3,029 results on '"A., Fuentes"'
Search Results
2. Anthelmintic effect of cannabidiol against 'Echinococcus granulosus sensu stricto'
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Albani, Clara Maria, Fuentes, Giselle, Ramirez, Cristina Lujan, Pensel, Patricia Eugenia, Gatti, Florencia, Albanese, Adriana, Nutter, Diego, Aguirre, Matias Ezequiel, Di Iorio, Yésica Dolores, and Elissondo, Maria Celina
- Published
- 2024
3. What do you need to know before studying chagas disease?: A beginner's guide
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De Fuentes-Vicente, Jose A, Santos-Hernandez, Nancy G, Ruiz-Castillejos, Christian, Espinoza-Medinilla, Eduardo E, Flores-Villegas, A Laura, de Alba-Alvarado, Mariana, Cabrera-Bravo, Margarita, Moreno-Rodriguez, Adriana, and Vidal-Lopez, Dolores G
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- 2023
4. Pneumocystis jirovecii colonization in Mexican patients with chronic obstructive pulmonary disease
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Plascencia-Cruz, Marcela, Plascencia-Hernandez, Arturo, De Armas-Rodriguez, Yaxsier, Cervantes-Guevara, Gabino, Cervantes-Cardona, Guillermo Alonso, Ramirez-Ochoa, Sol, Gonzalez-Ojeda, Alejandro, Fuentes-Orozco, Clotilde, Hernandez-Mora, Francisco Javier, Gonzalez-Valencia, Carlos Miguel, de Acha-Chavez, Andrea Perez, and Cervantes-Perez, Enrique
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- 2023
5. Assessment of post-dengue rheumatic symptoms using the WOMAC and DAS-28 questionnaires in a Honduran population after a four-month follow-up
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Zambrano, Lysien I, Fuentes-Barahona, Itzel Carolina, Portillo-Pineda, Ricardo, Aguilar-Ponce, Melissa, Murillo-Padilla, Jose Carlos, Suazo-Menocal, Marlen, Antunez-Salgado, Cesar, Medina-Bassilet, Edissa, Munoz-Lara, Fausto, Bonilla-Aldana, D Katterine, Montenegro-Idrogo, Juan J, and RodrIguez-Morales, Alfonso J
- Published
- 2022
6. Persistence of schistosomiasis-related morbidity in northeast Brazil: An integrated spatio-temporal analysis
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da Silva, Barbara Morgana, Ferreira, Anderson Fuentes, da Silva, Jose Alexandre Menezes, de Amorim, Rebeca Gomes, Domingues, Ana Lucia Coutinho, Pinheiro, Marta Cristhiany Cunha, de Moraes Bezerra, Fernando Schemelzer, Heukelbach, Jorg, and Ramos, Alberto Novaes
- Published
- 2021
7. Unhealthy Lifestyle Contributes to Negative Mental Health and Poor Quality of Life in Young University Students.
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Caamaño-Navarrete, Felipe, Saavedra-Vallejos, Esteban, Guzmán-Guzmán, Iris Paola, Arriagada-Hernández, Carlos, Fuentes-Vilugrón, Gerardo, Jara-Tomckowiack, Lorena, Lagos-Hernández, Roberto, Fuentes-Merino, Paola, Alvarez, Cristian, and Delgado-Floody, Pedro
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LIFESTYLES ,RISK assessment ,CROSS-sectional method ,MENTAL health ,RESEARCH funding ,LOGISTIC regression analysis ,ANXIETY ,DESCRIPTIVE statistics ,SCREEN time ,MANN Whitney U Test ,CHI-squared test ,ODDS ratio ,HEALTH behavior ,QUALITY of life ,PSYCHOLOGICAL stress ,COLLEGE students ,DATA analysis software ,CONFIDENCE intervals ,MENTAL depression ,PHYSICAL activity ,REGRESSION analysis - Abstract
Background: A negative lifestyle is reported to be related to poor mental health and quality of life (QOL). However, there is little information on this in university students. The objective of the present study was to investigate the association between mental health (i.e., anxiety, depression symptoms and stress), QOL, SWLS and lifestyle parameters (i.e., PA, sleep duration, ST and food habits) among Chilean university students and then to determine the differences in mental health, QOL, SWLS and lifestyle parameters according to gender. Methods: This cross-sectional study included a total of 211 university students (128 females and 83 males) aged 18–28 years. Mental health, QOL and lifestyle were measured through validated questionnaires. Results: Bad food habits (lowest score in the food survey) were linked to anxiety (2.3 [0.22–4.36], p = 0.03), depressive symptoms (3.75 [1.54–5.9], p = 0.001) and stress (2.24 [0.31–4.17], p = 0.023). Furthermore, <6 h of sleep was related to poorer mental health (13.5 [7.6–19.5], p = 0.001), anxiety (4.2 [2.0–6.4], p < 0.001), depressive symptoms (5.5 [3.2–7.9], p < 0.001) and stress (3.8 [1.8–5.9], p < 0.001). In addition, ≥4 h of ST was linked positively to negative mental health (8.3 [2.86–13.7], p = 0.003), depressive symptoms (3.45 [1.47–5.4], p = 0.001) and anxiety (3.2 [1.05–5.4], p = 0.004). Non-physical activity was related to the scores for anxiety (2.6 [0.20–5.0], p = 0.030), depression (2.7 [0.009–5.3], p = 0.049) and stress (2.4 [0.12–4.7], p = 0.039). Conclusions: this study showed that unhealthy lifestyle factors (i.e., insufficient sleep, lack of PA and prolonged ST) were strongly associated with poorer mental health and QOL in university students. These findings highlight the importance of addressing these aspects of lifestyle in intervention and health promotion programs aimed at young university students in order to improve their mental health and overall QOL. [ABSTRACT FROM AUTHOR]
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- 2024
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8. Types of Injuries and the Severity of Shoulder Dysfunction Associated with Diabetes Mellitus in Patients with Functional Impairment: A Case–Control Study.
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Fuentes-Murguia, Mercedes, Carrazco-Peña, Karla B., Delgado-Enciso, Osiris G., Castellanos-Gomez, Joel, Hernandez-Fuentes, Gustavo A., Rojas-Larios, Fabian, Sanchez-Ramirez, Carmen A., Martinez-Fierro, Margarita L., Rodriguez-Sanchez, Iram P., Guzmán-Esquivel, José, Garza-Veloz, Idalia, Del-Río-Valdivia, José E., Plata-Florenzano, Jorge E., and Delgado-Enciso, Iván
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ROTATOR cuff ,SHOULDER injuries ,TENDON injuries ,PEOPLE with diabetes ,SUPRASPINATUS muscles ,SHOULDER disorders - Abstract
Background/Objectives: Patients with diabetes have been reported to experience a higher prevalence of shoulder disorders compared to those without diabetes or with other medical conditions. However, the specific types of shoulder injuries and the extent of functional impairment associated with diabetes mellitus remain unclear. This study aimed to assess the association between diabetes and specific shoulder injuries, as well as the degree of functional impairment in affected patients. Methods: A case–control study was conducted involving 136 patients with shoulder functional impairment (UCLA Shoulder Scale ≤ 27). The study included 38 patients with diabetes and 98 non-diabetic controls. Shoulder injuries were diagnosed using ultrasonography, focusing on the supraspinatus tendon, long head of the biceps tendon, subscapularis tendon, and the presence of adhesive capsulitis or rotator cuff tears. Results: Diabetic patients had significantly higher rates of poor shoulder function compared to non-diabetic controls (89.47% vs. 63.26%, adjusted OR [adOR] 5.22, 95% CI 1.57–17.32, p = 0.007). While both groups had high rates of supraspinatus and long head of the biceps tendon injuries (~80%), no significant differences were found between them (p > 0.300). However, diabetic patients were more than three times as likely to have subscapularis tendon injuries (adOR 3.15, 95% CI 1.26–7.90, p = 0.014) and massive rotator cuff tears (adOR 3.76, 95% CI 1.16–12.15, p = 0.027). Additionally, diabetes was associated with a fourfold increased risk of adhesive capsulitis (adOR 4.16, 95% CI 1.20–14.47, p = 0.025). Conclusions: Diabetes mellitus is linked to greater functional and structural deterioration of the shoulder, highlighting the importance of considering diabetes as a risk factor for specific shoulder injuries. Early diagnosis and treatment may improve outcomes for diabetic patients with shoulder disorders. [ABSTRACT FROM AUTHOR]
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- 2024
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9. Oral Pathobiont-Derived Outer Membrane Vesicles in the Oral–Gut Axis.
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Catalan, Eduardo A., Seguel-Fuentes, Emilio, Fuentes, Brandon, Aranguiz-Varela, Felipe, Castillo-Godoy, Daniela P., Rivera-Asin, Elizabeth, Bocaz, Elisa, Fuentes, Juan A., Bravo, Denisse, Schinnerling, Katina, and Melo-Gonzalez, Felipe
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EXTRACELLULAR vesicles , *GASTROINTESTINAL diseases , *PORPHYROMONAS gingivalis , *BACTERIAL genes , *INTESTINAL mucosa - Abstract
Oral pathobionts are essential in instigating local inflammation within the oral cavity and contribute to the pathogenesis of diseases in the gastrointestinal tract and other distant organs. Among the Gram-negative pathobionts, Porphyromonas gingivalis and Fusobacterium nucleatum emerge as critical drivers of periodontitis, exerting their influence not only locally but also as inducers of gut dysbiosis, intestinal disturbances, and systemic ailments. This dual impact is facilitated by their ectopic colonization of the intestinal mucosa and the subsequent mediation of distal systemic effects by releasing outer membrane vesicles (OMVs) into circulation. This review elucidates the principal components of oral pathobiont-derived OMVs implicated in disease pathogenesis within the oral–gut axis, detailing virulence factors that OMVs carry and their interactions with host epithelial and immune cells, both in vitro and in vivo. Additionally, we shed light on the less acknowledged interplay between oral pathobionts and the gut commensal Akkermansia muciniphila, which can directly impede oral pathobionts' growth and modulate bacterial gene expression. Notably, OMVs derived from A. muciniphila emerge as promoters of anti-inflammatory effects within the gastrointestinal and distant tissues. Consequently, we explore the potential of A. muciniphila-derived OMVs to interact with oral pathobionts and prevent disease in the oral–gut axis. [ABSTRACT FROM AUTHOR]
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- 2024
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10. Synthesis, Physicochemical Characterization, and Antimicrobial Evaluation of Halogen-Substituted Non-Metal Pyridine Schiff Bases.
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Carreño, Alexander, Morales-Guevara, Rosaly, Cepeda-Plaza, Marjorie, Páez-Hernández, Dayán, Preite, Marcelo, Polanco, Rubén, Barrera, Boris, Fuentes, Ignacio, Marchant, Pedro, and Fuentes, Juan A.
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STREPTOCOCCUS agalactiae ,STREPTOCOCCUS pyogenes ,GRAM-negative bacteria ,SCHIFF bases ,SALMONELLA typhimurium - Abstract
Four synthetic Schiff bases (PSB1 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4,6-dibromophenol], PSB2 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4,6-diiodophenol], PSB3 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4-iodophenol], and PSB4 [(E)-2-(((4-aminopyridin-3-yl)imino)methyl)-4-chloro-6-iodophenol]) were fully characterized. These compounds exhibit an intramolecular hydrogen bond between the hydroxyl group of the phenolic ring and the nitrogen of the azomethine group, contributing to their stability. Their antimicrobial activity was evaluated against various Gram-negative and Gram-positive bacteria, and it was found that the synthetic pyridine Schiff bases, as well as their precursors, showed no discernible antimicrobial effect on Gram-negative bacteria, including Salmonella Typhi (and mutant derivatives), Salmonella Typhimurium, Escherichia coli, and Morganella morganii. In contrast, a more pronounced biocidal effect against Gram-positive bacteria was found, including Bacillus subtilis, Streptococcus agalactiae, Streptococcus pyogenes, Enterococcus faecalis, Staphylococcus aureus, and Staphylococcus haemolyticus. Among the tested compounds, PSB1 and PSB2 were identified as the most effective against Gram-positive bacteria, with PSB2 showing the most potent biocidal effects. Although the presence of reactive oxygen species (ROS) was noted after treatment with PSB2, the primary mode of action for PSB2 does not appear to involve ROS generation. This conclusion is supported by the observation that antioxidant treatment with vitamin C only partially mitigated bacterial inhibition, indicating an alternative biocidal mechanism. [ABSTRACT FROM AUTHOR]
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- 2024
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11. Appropriateness of Ketoanalogues of Amino Acids, Calcium Citrate, and Inulin Supplementation for CKD Management: A RAND/UCLA Consensus.
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Saavedra-Fuentes, Nadia, Carmona-Montesinos, Enrique, Castañeda-Hernández, Gilberto, Campos, Israel, Castillo-Salinas, Juan Carlos, Castillo-Tapia, Javier Alberto, Del Castillo-Loreto, Karla Guadalupe, Falcón-Martínez, Juan Carlos, Fuentes-García, Raquel, García de León Guerrero, Miguel Ángel, García-García, Victor, Gómez-García, Erika F., González-Toledo, Rafael, Jaime, Angélica, Rely, Kely, Lerma, Claudia, Morales-Buenrostro, Luis E., Quilantan-Rodriguez, Mateo, Rodriguez-Matías, Adrián, and Rojas-Rodriguez, Felipe Octavio
- Abstract
Background: Current treatment for chronic kidney disease (CKD) focuses on improving manifestations and delaying progression. Nutritional approaches play a crucial role in CKD management, and various supplements have become available. Ketoanalogues of amino acids (KAs), calcium citrate, and inulin have been proposed as suitable supplements, yet their widespread use has been limited due to insufficient evidence. This study aimed to generate general guidance statements on the appropriateness of these supplements through a RAND/UCLA consensus process. Methods: A RAND/UCLA consensus panel was convened to evaluate the appropriateness of these supplements in different clinical scenarios. In this study, we present a subgroup analysis focusing on a panel of eleven clinical nephrologists from among the experts. Results: Supplementation of low-protein diets (LPDs) and very low-protein diets (VLPDs) with KA was considered appropriate to reduce manifestations and delay CKD outcomes, supplementation with calcium citrate is considered appropriate to reduce CKD manifestations, and supplementation with inulin is considered appropriate to delay CKD outcomes and manage comorbidities. Conclusions: Based on a combination of clinical experience and scientific evidence, the panel reached a consensus that KA supplementation of LPD and VLPD, calcium citrate, and inulin are appropriate in patients with CKD across various scenarios. [ABSTRACT FROM AUTHOR]
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- 2024
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12. Influence of Materials of Moulds and Geometry of Specimens on Mechanical Properties of Grouts Based on Ultrafine Hydraulic Binder
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Universidad de Sevilla. Departamento de Ingeniería y Ciencia de los Materiales y del Transporte, Universidad de Sevilla. Departamento de Estructuras de Edificación e Ingeniería del Terreno, Universidad de Sevilla. Departamento de Mecánica de Medios Continuos y Teoría de Estructuras, Universidad de Sevilla. TEP206: SATH Sostenibilidad en Arquitectura, Tecnología y Patrimonio: Materialidad y Sistemas Constructivos, Universidad de Sevilla. TEP245: Ingeniería de las Estructuras, Universidad de Sevilla. TEP963: Ingeniería de Estructuras y Materiales, Universidad de Sevilla. TEP123: Metalurgia e Ingeniería de los Materiales, European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER), Ministerio de Ciencia e Innovación (MICIN). España, Junta de Andalucía, Universidad de Sevilla, Hortigón Fuentes, Beatriz, Rodríguez-Mayorga, Esperanza, Santiago-Espinal, José Antonio, Fernández Ancio, Fernando, Gallardo Fuentes, José María, Universidad de Sevilla. Departamento de Ingeniería y Ciencia de los Materiales y del Transporte, Universidad de Sevilla. Departamento de Estructuras de Edificación e Ingeniería del Terreno, Universidad de Sevilla. Departamento de Mecánica de Medios Continuos y Teoría de Estructuras, Universidad de Sevilla. TEP206: SATH Sostenibilidad en Arquitectura, Tecnología y Patrimonio: Materialidad y Sistemas Constructivos, Universidad de Sevilla. TEP245: Ingeniería de las Estructuras, Universidad de Sevilla. TEP963: Ingeniería de Estructuras y Materiales, Universidad de Sevilla. TEP123: Metalurgia e Ingeniería de los Materiales, European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER), Ministerio de Ciencia e Innovación (MICIN). España, Junta de Andalucía, Universidad de Sevilla, Hortigón Fuentes, Beatriz, Rodríguez-Mayorga, Esperanza, Santiago-Espinal, José Antonio, Fernández Ancio, Fernando, and Gallardo Fuentes, José María
- Abstract
Ultrafine hydraulic binder grout injection is a technique utilised for repairing masonry, either to connect sections, seal joints, or fill voids due to its great capacity for penetration and higher mechanical strength than lime grout. In this research, the mechanical properties of ultrafine hydraulic cement grout are analysed considering the influence of the mould material for preparing the specimens and their geometry characteristics in the context of the specifications set out in several international standards. The test campaign to ascertain compressive and flexural strength in different circumstances is supplemented with a physical and chemical characterisation of both binder and fresh and hardened grout. Significant differences in mechanical properties between specimens prepared with absorbent or non-absorbent-water material are found due to the influence of drying shrinkage and decanting binder during the curing process. Furthermore, the slenderness of specimens is presented as an important factor in determining the compressive strength of mixtures.
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- 2024
13. Characterizing Muscle Tissue Quality Post-Stroke: Echovariation as a Clinical Indicator.
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Asadi, Borhan, Pujol-Fuentes, Clara, Carcasona-Otal, Alberto, Calvo, Sandra, Herrero, Pablo, and Lapuente-Hernández, Diego
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FEATURE extraction , *SKELETAL muscle , *ULTRASONIC imaging , *STROKE , *IMAGE analysis - Abstract
Background/Objectives: Strokes remain a major global health concern, contributing significantly to disability and healthcare costs. Currently, there are no established indicators to accurately assess the degree of muscle tissue impairment in stroke-affected individuals. However, ultrasound imaging with an echotexture analysis shows potential as a quantitative tool to assess muscle tissue quality. This study aimed to identify specific echotexture features in the gastrocnemius medialis that effectively characterize muscle impairment in post-stroke individuals. Methods: An observational study was conducted with 22 post-stroke individuals. A total of 21 echotexture features were extracted and analyzed, including first-order metrics, a grey-level co-occurrence matrix, and a grey-level run length matrix. The modified Heckmatt scale was also applied to correlate with the most informative echotexture features. Results: Among the features analyzed, echovariation (EV), echointensity, and kurtosis emerged as the most informative indicators of muscle tissue quality. The EV was highlighted as the primary feature due to its strong and significant correlation with the modified Heckmatt scale (r = −0.81, p < 0.001) and its clinical and technical robustness. Lower EV values were associated with poorer muscle tissue quality, while higher values indicated better quality. Conclusions: The EV may be used as a quantitative indicator for characterizing the gastrocnemius medialis muscle tissue quality in post-stroke individuals, offering a more nuanced assessment than traditional qualitative scales. Future studies should investigate the correlation between the EV and other clinical outcomes and explore its potential to monitor the treatment efficacy, enhancing its applicability in clinical practice. [ABSTRACT FROM AUTHOR]
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- 2024
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14. Targeting of Non-Classical Human Leukocyte Antigens as Novel Therapeutic Strategies in Cancer.
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Benitez Fuentes, Javier David, Bartolome Arcilla, Jorge, Mohamed Mohamed, Kauzar, Lopez de Sa, Alfonso, de Luna Aguilar, Alicia, Guevara-Hoyer, Kissy, Ballestin Martinez, Pablo, Lazaro Sanchez, Antonio David, Carosella, Edgardo D., Ocaña, Alberto, and Sánchez-Ramon, Silvia
- Abstract
Simple Summary: Non-classical human leukocyte antigens (HLAs) are molecules that help control the immune system's response to cancer. While classical HLAs have been studied for their role in detecting and fighting tumors, non-classical HLAs—specifically HLA-E, HLA-F, HLA-G, and HLA-H—are less understood but appear to play unique roles in helping tumors evade the immune system. This review examines how these non-classical HLAs contribute to cancer progression and discusses their potential as new targets for cancer treatments. By exploring the specific functions of HLA-E, HLA-F, HLA-G, and HLA-H in various cancers, the authors aim to highlight their importance in the immune system's interaction with tumors. Human leukocyte antigens (HLAs) are essential regulators of immune responses against cancer, with classical HLAs well-documented for their role in tumor recognition and immune surveillance. In recent years, non-classical HLAs—including HLA-E, HLA-F, HLA-G, and HLA-H—have emerged as critical players in the immune landscape of cancer due to their diverse and less conventional functions in immune modulation. These molecules exhibit unique mechanisms that enable tumors to escape immune detection, promote tumor progression, and contribute to therapeutic resistance. This review provides a comprehensive examination of the current understanding of non-classical HLAs in solid cancers, focusing on their specific roles in shaping the tumor microenvironment and influencing immune responses. By analyzing how HLA-E, HLA-F, HLA-G, and HLA-H modulate interactions with immune cells, such as T cells, natural killer cells, and antigen-presenting cells, we highlight key pathways through which these molecules contribute to immune evasion and metastasis. Additionally, we review promising therapeutic strategies aimed at targeting non-classical HLAs, including emerging immunotherapies that could potentially enhance cancer treatment outcomes by reversing immune suppression within tumors. Understanding the influence of these non-classical HLAs in solid cancers may offer new insights into cancer immunology and may lead to the development of innovative and more effective immunotherapeutic approaches. This review underscores the importance of non-classical HLAs as potential therapeutic targets, providing a necessary foundation for future studies in the evolving field of cancer immunotherapy. [ABSTRACT FROM AUTHOR]
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- 2024
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15. Mechanical Behaviour and Microstructural Analysis of Earthen Materials Reinforced with Intensive Agricultural By-Products and Binders.
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Cervilla-Maldonado, Ana, Valverde-Palacios, Ignacio, Martín-Villegas, Francisco, and Fuentes-García, Raquel
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CONSTRUCTION & demolition debris ,SUSTAINABLE agriculture ,AGRICULTURAL wastes ,MATERIALS analysis ,REINFORCED soils - Abstract
Modern construction is largely dependent on steel and concrete, with natural materials such as earth being significantly underutilised. Despite its sustainability and accessibility, earth is not being used to its full potential in developed countries. This study explores innovative building materials using Alhambra Formation soil (Granada, Spain) reinforced with difficult-to-recycle agricultural waste: polypropylene fibres contaminated with organic matter and leachates. Fibres were added at a ratio between 0.20 and 0.80% of the soil mass, leachates at a ratio between 4.25 and 8.50%, and lime was incorporated at 2.00% and 4.00% for specimens with higher residue content. Physico-mechanical properties, including uniaxial compressive strength and longitudinal strain, were analysed together with the microstructure. The results showed that polypropylene fibres, in comparison to the use of leachates, improved compressive strength and ductility, reaching a compressive strength of 1.76 MPa with a fibre content of 0.40%. On the other hand, this value is 7.4% lower than the reference sample without additives. The fibre-reinforced samples showed a higher porosity compared to the samples with leachates or without additives. This approach highlights the potential of agricultural waste for the development of sustainable construction materials, offering enhancements in the strength and ductility of reinforced soils. [ABSTRACT FROM AUTHOR]
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- 2024
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16. The Effect of H + Fluence Irradiation on the Optical, Structural, and Morphological Properties of ZnO Thin Films.
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López-Suárez, Alejandra, Cruz-Delgado, Yaser D., Acosta, Dwight R., López-Patiño, Juan, and Fuentes, Beatriz E.
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RUTHERFORD backscattering spectrometry ,SUBSTRATES (Materials science) ,PARTICLE size distribution ,ZINC oxide films ,OPTICAL spectroscopy ,IRRADIATION - Abstract
Polycrystalline zinc oxide (ZnO) thin films were deposited on soda-lime glass substrates using the chemical spray pyrolysis method at 450 °C. The samples were irradiated with 8 keV H
+ ions at three different fluences using a Colutron ion gun. The effects of the irradiation on the structural, morphological, and optical properties were studied with different techniques, including Rutherford Backscattering Spectrometry (RBS), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and Ultraviolet and Visible Spectroscopy (UV–Vis). The results show that ion irradiation enhances crystallinity, narrowing the optical band gap. The changes in transmittance are related to defect formation within the material, which acts as light absorption and re-emission centers. A shifting of the film's preferred growth orientation to the c-axis and changing the grain morphology and size distribution was detected. We observed an increase in the lattice parameters observed after irradiation, suggesting an expansion of the crystalline structure due to ions incorporation and defects within the ZnO crystal lattice. The morphological study shows an increase in the average size of the large particles after irradiation. This change is attributed to the emergence of defects and nucleation centers during irradiation. The average size of small particles remained relatively constant after irradiation, suggesting that small particles are more stable and less susceptible to external influences, resulting in fewer changes due to irradiation. [ABSTRACT FROM AUTHOR]- Published
- 2024
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17. Tissue Sources Influence the Morphological and Morphometric Characteristics of Collagen Membranes for Guided Bone Regeneration.
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Alarcón-Apablaza, Josefa, Godoy-Sánchez, Karina, Jarpa-Parra, Marcela, Garrido-Miranda, Karla, and Fuentes, Ramón
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GUIDED bone regeneration ,FOURIER transform infrared spectroscopy ,BIOPOLYMERS ,ANALYTICAL chemistry ,CHEMICAL properties ,PERICARDIUM - Abstract
(1) Background: Collagen, a natural polymer, is widely used in the fabrication of membranes for guided bone regeneration (GBR). These membranes are sourced from various tissues, such as skin, pericardium, peritoneum, and tendons, which exhibit differences in regenerative outcomes. Therefore, this study aimed to evaluate the morphological and chemical properties of porcine collagen membranes from five different tissue sources: skin, pericardium, dermis, tendons, and peritoneum. (2) Methods: The membrane structure was analyzed using energy-dispersive X-ray spectrometry (EDX), variable pressure scanning electron microscopy (VP-SEM), Fourier transform infrared spectroscopy (FTIR), and thermal stability via thermogravimetric analysis (TGA). The absorption capacity of the membranes for GBR was also assessed using an analytical digital balance. (3) Results: The membranes displayed distinct microstructural features. Skin- and tendon-derived membranes had rough surfaces with nanopores (1.44 ± 1.24 µm and 0.46 ± 0.1 µm, respectively), while pericardium- and dermis-derived membranes exhibited rough surfaces with macropores (78.90 ± 75.89 µm and 64.89 ± 13.15 µm, respectively). The peritoneum-derived membrane featured a rough surface of compact longitudinal fibers with irregular macropores (9.02 ± 3.70 µm). The thickness varied significantly among the membranes, showing differences in absorption capacity. The pericardium membrane exhibited the highest absorption, increasing by more than 10 times its initial mass. In contrast, the skin-derived membrane demonstrated the lowest absorption, increasing by less than 4 times its initial mass. Chemical analysis revealed that all membranes were primarily composed of carbon, nitrogen, and oxygen. Thermogravimetric and differential scanning calorimetry analyses showed no significant compositional differences among the membranes. FTIR spectra confirmed the presence of collagen, with characteristic peaks corresponding to Amide A, B, I, II, and III. (4) Conclusions: The tissue origin of collagen membranes significantly influences their morphological characteristics, which may, in turn, affect their osteogenic properties. These findings provide valuable insights into the selection of collagen membranes for GBR applications. [ABSTRACT FROM AUTHOR]
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- 2024
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18. Comparative Analysis of Infusions and Ethanolic Extracts of Annona muricata Leaves from Colima, Mexico: Phytochemical Profile and Antioxidant Activity.
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Hernandez-Fuentes, Gustavo A., Delgado-Enciso, Osiris G., Larios-Cedeño, Edgar G., Sánchez-Galindo, Juan M., Ceballos-Magaña, Silvia G., Pineda-Urbina, Kayim, Alcalá-Pérez, Mario A., Magaña-Vergara, Nancy E., Delgado-Enciso, Josuel, Díaz-Llerenas, Uriel, Diaz-Martinez, Janet, Garza-Veloz, Idalia, Martinez-Fierro, Margarita L., Rodriguez-Sanchez, Iram P., and Delgado-Enciso, Ivan
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OXIDANT status , *PHENOLS , *BIOACTIVE compounds , *TRADITIONAL medicine , *FLAVONOIDS , *TANNINS - Abstract
Background: Annona muricata L. (guanabana) leaves are rich in bioactive compounds with potential antioxidant properties. In the state of Colima, both ethanolic extracts and infusions are traditionally used in folk medicine to address various ailments. This study aimed to evaluate and compare the phytochemical composition and antioxidant activities of ethanolic extracts and infusions of A. muricata leaves from three geographic regions in Colima, Mexico, with a focus on how geographic origin affects their bioactive properties. Methods: Ethanolic extracts and infusions were prepared from A. muricata leaves and analyzed using phytochemical screening; DPPH, total antioxidant capacity (TAC), and total phenolic content (TPC) measurements; and HPLC. TLC was also conducted to examine the presence of specific compounds, such as flavonoids and phenols. Results: Both the ethanolic extracts and infusions contained significant levels of alkaloids, flavonoids, tannins, and phenolic compounds. The infusions demonstrated superior antioxidant capacity, with DPPH inhibition values of 72.5%, 68.3%, and 65.1% in the northern, central, and southern regions, respectively, compared to the ethanolic extracts' values of 50.3%, 48.9%, and 45.0%. HPLC identified quercetin as a major compound across all samples. Geographically, the northern region exhibited higher concentrations of bioactive compounds, particularly total flavonoid content (TFC) and iron-reducing power (FRPA). Conclusions: Both the ethanolic extracts and infusions of A. muricata leaves exhibited significant antioxidant properties, with the infusions showing superior performance. The results suggest that A. muricata infusions may have potential applications in managing oxidative stress-related diseases such as cancer and diabetes. Exploring their use in traditional medicine and employing this type of approach can help discern the metabolite profile responsible for these bioactivities. Geographic factors influence the bioactive profile of the plant, and further research is needed to isolate specific bioactive compounds and elucidate their therapeutic mechanisms. [ABSTRACT FROM AUTHOR]
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- 2024
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19. Diet Supplementation with Ketoanalogues, Inulin, and Calcium Citrate in Chronic Kidney Disease: A Retrospective Cohort.
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Calderón-Juárez, Martín, Saavedra-Fuentes, Nadia, Del Castillo-Loreto, Karla Guadalupe, Castillo-Salinas, Juan Carlos, and Lerma, Claudia
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CHRONIC kidney failure , *LOW-protein diet , *BODY composition , *BODY mass index , *MUSCLE mass , *INULIN - Abstract
The addition of ketoanalogues (KAs) to a low-protein diet has been shown to mitigate the progression of pre-dialysis chronic kidney disease (CKD). The addition of inulin and calcium citrate may add further benefits, given their nephroprotective effects. In this study, we tested the changes in estimated glomerular filtration rate (eGFR), CKD symptoms, body composition, and biochemical parameters after 6 months of diet supplementation with Cetolán III, a combination of KA, inulin, and calcium citrate. We included 76 adult patients diagnosed with CKD stages 3 and 4 and not treated with renal replacement therapy in a retrospective cohort. In this cohort, participants were followed through two clinic visits at 3 and 6 months after diet supplementation. We found a slight increase in eGFR at 3 and 6 months compared with baseline, as well as a decrease in the severity of CDK-related symptoms, fat mass, and muscle mass. We observed only a slight decrease in creatinine and uric acid after 6 months of follow-up. We did not find a remarkable change in anthropometric parameters (e.g., body mass index, waist circumference, and arm muscle area). This observational study suggests that addition of KA, inulin, and calcium citrate to a low protein- diet could be associated with an improvement in eGFR and symptom severity in CKD pre-dialysis. [ABSTRACT FROM AUTHOR]
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- 2024
- Full Text
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20. Use of Edaphic Bioindicators to Mitigate Environmental Impact and Improve Agricultural Research and Training.
- Author
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Cano-Ortiz, Ana, Piñar Fuentes, José Carlos, Peña-Martínez, Juan, and Cano, Eusebio
- Subjects
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ORGANIC farming , *AGRICULTURAL education , *SUSTAINABILITY , *CONSCIOUSNESS raising , *AGRICULTURAL research - Abstract
The world is currently experiencing unsustainable development, which poses significant risks to global society. In response, there is a growing advocacy for sustainable development across all sectors, driven by social resilience. This shift is fostering substantial socio-environmental tensions. However, the combined power of scientific research and social education has the potential to reverse this trend. Transitioning from an unsustainable territorial model to a sustainable one is both feasible and economically profitable. This transition can be achieved through knowledge of soil bioindicators, which provide valuable information about soil nutrient content. By understanding these indicators, nutrient inputs can be tailored, reducing or eliminating pollutants such as excessive fertilizers, herbicides, and pesticides. Training experts and raising social awareness through education on new research are essential steps in this process. For decades, it has been recognized that globalization, industrialization, and population growth have driven unsustainable development, leading to degraded agroecosystems. To address this issue, government institutions are promoting sustainability through ecological agriculture and CO2 reduction, both of which can be supported by the use of soil bioindicators. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
21. Enteric Methane Emission Factor for Dairy Farming in Peru.
- Author
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Fernandez, Melisa, Fuentes Navarro, Eduardo, Viera Valencia, Mario Agustín, Llacsa, Javier, Carrasco Chilón, William Leoncio, Altamirano, Wilman, Romero Delgado, Gelver, Ayala, Richard, Vela-Alvarado, Jorge Washinton, Zegarra Paredes, Jorge Luis, Molina-Botero, Isabel Cristina, and Gómez, Carlos
- Subjects
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DAIRY cattle , *MILK yield , *DAIRY farming , *CALVES , *GREENHOUSE gases , *HEIFERS - Abstract
The objective of this study was to determine the enteric methane (CH4) emission factor (EF) at the national level for Peruvian dairy cattle following the IPCC Tier II (2006, 2019) methodology. Data were collected from seven regions of Peru and classified according to the type of feeding as intensive, semi-intensive or extensive. It included farm information (geolocation) and livestock information for two seasons of the year. At the national level, lactating cows obtained the highest EF with 117 kg CH4/head/year, followed by heifers from 15 to 24 months of age (91 kg), non-lactating cows (74 kg), heifers from 12 to 15 months of age (67 kg), calves (62 kg) and pre-weaned calves (16 kg). Additionally, the highest EF was reported for lactating cows in the intensive system (151.8 kg CH4/head), which is 46.8 kg CH4/head more per year than that reported in the semi-intensive and extensive systems in the same animal category. The combined uncertainty in all animal categories was low to very low (between 9.4 and 18.72%), except for that of lactating cows, which was low to medium (22.24 and 26.72%). These results allowed us to find the EF that exerts the most pressure according to the level of intensity in Peruvian dairy farming. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
22. Salivary IL-1 Beta Level Associated with Poor Sleep Quality in Children/Adolescents with Autism Spectrum Disorder.
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Fuentes-Albero, Milagros, Mafla-España, Mayra Alejandra, Martínez-Raga, José, and Cauli, Omar
- Subjects
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SLEEP quality , *AUTISM spectrum disorders , *INTERLEUKIN-1 , *SLEEP disorders , *PSYCHIATRIC drugs - Abstract
Background: Sleep disorders are common in youths with autism spectrum disorders. Inflammatory cytokines such as Il-1 beta and Il-6 in saliva have been associated with alterations in sleep quality in various conditions. We assessed whether there were associations between the salivary concentration of IL-1 beta and IL-6 and sleep quality in youths with ASD versus typically developing (TD) age- and gender-matched youths. Method: Forty children and adolescents with ASD or TD participated in this study (20% females). Their parents answered the items of a validated questionnaire on sleep quality (Pittsburgh Sleep Quality Index). Results: The mean Pittsburgh score was significantly higher (i.e., the quality of sleep was poorer) in the ASD group (8.68 ± 0.35 (SEM), ranging from 7 to 12 points), compared to the TD group (7.35 ± 0.54 (SEM), ranging from 2 to 12 points) (p = 0.02, Mann–Whitney U test). There were no significant differences in the salivary concentration of Il-1 beta and IL-6 receptor between the two groups, but salivary IL-1 beta concentration was inversely associated with poor sleep quality in the ASD group. No associations between the salivary Il-6 concentration and sleep quality were found in either group. Linear regression analysis by separate groups revealed significant associations between the sleep quality score and the concentration of IL-1 beta in the ASD group (p = 0.01, OR = −0.53, 95% CI −0.008–0.001). In contrast, no significant associations were observed in the TD group, or for IL-6 in either group. No significant effects of sex, age, or use of psychotropic medications were found. Conclusions: Children and adolescents with ASD showed significantly poorer sleep quality based on their parents' reports compared to the TD group, and the salivary IL-1 beta concentration was inversely associated with sleep quality only in the ASD group. Further studies on the associations between inflammatory cytokines and sleep in ASD are needed. [ABSTRACT FROM AUTHOR]
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- 2024
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23. Botany Teaching–Learning Proposal Using the Phytosociological Method for University Students' Study of the Diversity and Conservation of Forest Ecosystems for University Students.
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Cano-Ortiz, Ana, Piñar Fuentes, José Carlos, Musarella, Carmelo Maria, and Cano, Eusebio
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BIOSPHERE reserves , *TROPICAL dry forests , *FOREST conservation , *HABITAT conservation , *ENDEMIC species - Abstract
We propose a method consisting of four steps for phytosociological research and education on flora and vegetation diversity. We demonstrate the application of this method using as an example a territory of special interest due to its high index of endemism (Dominican Republic Island), which is a biodiversity hotspot and hosts several protected areas, such as the Jaragua-Bahoruco-Enriquillo Biosphere Reserve. Nonetheless, this model, based on teaching the phytosociological method, can be extrapolated to any location worldwide. As an example, we analyzed the dry and humid forests. Through the four research phases, this study revealed a greater number of endemic species in the dry forest compared to the humid forest, with more endemics found in districts A12 and A16. The sequenced teaching of the research phases allows for the training of university students, future managers, and educators. The model enables learning sampling techniques, developing analysis and interpretation skills, and assessing the need for conservation of habitats rich in endemic species. The teaching outcomes of this study provide optimal training for the management and dissemination of ecological values, which allow broader society to learn to respect the environment. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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24. Molecular Profiling of Endocrine Resistance in HR+/HER2-Metastatic Breast Cancer: Insights from Extracellular Vesicles-Derived DNA and ctDNA in Liquid Biopsies.
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Martínez-Rodríguez, Ana, Fuentes-Antrás, Jesús, Lorca, Víctor, López de Sá, Alfonso, Pérez-Segura, Pedro, Moreno, Fernando, García-Sáenz, Jose Angel, and García-Barberán, Vanesa
- Abstract
Standard treatments in hormone receptor-positive (HR+)/HER2-metastatic breast cancer (mBC) typically involve endocrine therapy (ET) combined with CDK4/6 inhibitors, yet resistance to ET remains a persistent challenge in advanced cases. A deeper knowledge of the use of liquid biopsy is crucial for the implementation of precision medicine in mBC with real-time treatment guidance. Our study assesses the prognostic value of PIK3CA and ESR1 mutations in DNA derived from extracellular vesicles (EV-DNA) in longitudinal plasma from 59 HR+/HER2-mBC patients previously exposed to aromatase inhibitors, with a comparative analysis against circulating tumor DNA (ctDNA). Mutations were evaluated by digital PCR. PIK3CA and ESR1 mutations were found in 22 and 25% of patients. Baseline ESR1 mutations in EV-DNA were associated with shorter progression-free survival (PFS) across the cohort, with the Y537S mutation showing a particularly strong impact on the outcome of fulvestrant-treated patients. In contrast, PIK3CA mutations in EV-DNA did not significantly correlate with PFS, whereas in ctDNA, they were linked to poor outcomes. Altogether, this study positions EV-DNA as a valuable biomarker alongside ctDNA, enriching the understanding of different analytes in liquid biopsy and supporting strategies for HR+/HER2-mBC in precision oncology. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
25. Students and Clinical Teachers' Experiences About Productive Feedback Practices in the Clinical Workplace from a Sociocultural Perspective.
- Author
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Fuentes-Cimma, Javiera, Sluijsmans, Dominique, Ortega-Bastidas, Javiera, Villagran, Ignacio, Riquelme-Perez, Arnoldo, and Heeneman, Sylvia
- Published
- 2024
- Full Text
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26. Integrating Thermo-Ombroclimatic Indicators into Sustainable Olive Management: A Pathway for Innovation and Education.
- Author
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Piñar-Fuentes, José Carlos, Peña-Martínez, Juan, and Cano-Ortiz, Ana
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SUSTAINABILITY ,CLIMATE change ,SUSTAINABLE agriculture ,PRINCIPAL components analysis ,AGRICULTURAL education - Abstract
The study explores the integration of thermo and ombroclimatic bioindicators into sustainable agricultural practices, focusing on olive production in the Mediterranean. Given the increasing challenges posed by climate change, the study highlights the critical role of bioindicators in optimizing crop resilience and yield. Using data from the CHELSA model and long-term olive production records, the research identifies the impact of key climatic factors, such as temperature and precipitation, on olive yield variability. Principal component analysis (PCA) revealed that geographical location, precipitation, and thermal extremes significantly influence productivity. Furthermore, a multiple linear regression model confirmed the ombroclimatic index (Io) as a strong predictor of yield, emphasizing the necessity of balanced climatic conditions. The findings advocate for the integration of bioclimatic principles into agricultural training programs, promoting a holistic approach to crop management. Ultimately, the study underscores the need for informed decision-making and adaptive practices to ensure sustainable agricultural production under varying climatic conditions. This research provides a framework for future studies aiming to enhance crop resilience and address climate challenges, suggesting a pathway towards an innovative, sustainable agricultural model. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
27. Social Media Use and Fear of Missing out: An Exploratory Cross-Sectional Study in Junior High Students from Western Mexico.
- Author
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Maciel-Saldierna, Manuel, Méndez-Garavito, Ignacio Roberto, Elizondo-Hernandez, Emmanuel, Fuentes-Orozco, Clotilde, González-Ojeda, Alejandro, Ramírez-Ochoa, Sol, Cervantes-Pérez, Enrique, Vicente-Hernández, Berenice, Vázquez-Sánchez, Sergio Jiram, Chejfec-Ciociano, Jonathan Matías, and Cervantes-Guevara, Gabino
- Subjects
SOCIAL media ,JUNIOR high school students ,COVID-19 pandemic ,JUNIOR high schools ,DEMOGRAPHIC characteristics - Abstract
Background/Objectives: The increased use of social media in Mexico has given rise to the "fear of missing out" (FoMO) phenomenon, especially among adolescents. This study aimed to measure the extent of FoMO among junior high school students in the metropolitan area of Guadalajara, Mexico, during the COVID-19 pandemic. Additionally, this study explored the association between FoMO levels and demographic characteristics, as well as the type and frequency of social media use. Methods: A cross-sectional survey was conducted from November 2021 to January 2022 in four junior high schools. A total of 1264 students (656 females and 608 males) aged 11–16 years completed the Fear of Missing Out Scale, adapted to the Mexican context. Data on demographics, social media usage, and school shifts were collected. Statistical analyses were performed using t-tests, ANOVA, and correlation coefficients. Results: The mean FoMO score was 1.79 ± 0.64, with higher scores observed in females (p < 0.001) and students attending morning shifts (p = 0.001). Significant associations were found between higher FoMO scores and the use of social media platforms like Instagram, TikTok, and Pinterest (p < 0.001 for each). The most frequently used social media platforms were WhatsApp (1093), TikTok (828), and Instagram (583). Participants who used social media all week exhibited significantly higher FoMO scores than those who used it only on weekends (p < 0.001). Conclusions: FoMO is a significant phenomenon among junior high school students in Guadalajara, Mexico, particularly among females and those who use multiple social media platforms. The findings suggest a need for interventions to manage social media use and mitigate FoMO-related negative health outcomes in this population. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
28. Application of the Sponge Model Implants in the Study of Vaccine Memory in Mice Previously Immunized with LBSap.
- Author
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Lanna, Mariana Ferreira, Resende, Lucilene Aparecida, De Luca, Paula Mello, Goes, Wanessa Moreira, Zaldívar, Maykelin Fuentes, Costa, André Tetzl, Dutra, Walderez Ornelas, Reis, Alexandre Barbosa, Martins-Filho, Olindo Assis, Gollob, Kenneth Jhon, de Moura, Sandra Aparecida Lima, Dias, Edelberto Santos, Monteiro, Érika Michalsky, Silveira-Lemos, Denise, and Giunchetti, Rodolfo Cordeiro
- Subjects
VACCINE effectiveness ,LABORATORY mice ,IMMUNE response ,T cells ,DENDRITIC cells - Abstract
Background/Objectives: Considering the large number of candidates in vaccine-testing studies against different pathogens and the amount of time spent in the preclinical and clinical trials, there is a pressing need to develop an improved in vivo system to quickly screen vaccine candidates. The model of a polyester–polyurethane sponge implant provides a rapid analysis of the specific stimulus–response, allowing the study of a compartmentalized microenvironment. The sponge implant's defined measurements were standardized as a compartment to assess the immune response triggered by the vaccinal antigen. The LBSap vaccine (composed of Leishmania braziliensis antigens associated with saponin adjuvant) was used in the sponge model to assess the antigen-specific immunological biomarker, including memory generation after initial contact with the antigen. Methods: Mice strains (Swiss, BALB/c, and C57BL/6) were previously immunized using LBSap vaccine, followed by an antigenic booster performed inside the sponge implant. The sponge implants were assessed after 72 h, and the immune response pattern was analyzed according to leukocyte immunophenotyping and cytokine production. Results: After LBSap vaccination, the innate immune response of the antigenic booster in the sponge implants demonstrated higher levels in the Ly+ neutrophils and CD11c+ dendritic cells with reduced numbers of F4/80+ macrophages. Moreover, the adaptive immune response in Swiss mice demonstrated a high CD3+CD4+ T-cell frequency, consisting of an effector memory component, in addition to a cytoxicity response (CD3+CD8+ T cells), displaying the central memory biomarker. The major cell surface biomarker in the BALB/c mice strain was related to CD3+CD4+ effector memory, while the increased CD3+CD8+ effector memory was highlighted in C57/BL6. The cytokine profile was more inflammatory in Swiss mice, with the highest levels of IL-6, TNF, IFN-g, and IL-17, while the same cytokine was observed in in C57BL/6 yet modulated by enhanced IL-10 levels. Similar to Swiss mice, BALB/c mice triggered an inflammatory environment after the antigenic booster in the sponge implant with the increased levels in the ILL-6, TNF, and IFN-g. Conclusions: The findings emphasized the impact of genetic background on the populations engaged in immune responses, suggesting that this model can be utilized to enhance and track both innate and adaptive immune responses in vaccine candidates. Consequently, these results may inform the selection of the most suitable experimental model for biomolecule testing, taking into account how the unique characteristics of each mouse strain affect the immune response dynamics. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
29. Olive Growing Farming System and Damage by Cicadas.
- Author
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González-Ruiz, Ramón, Cuevas-López, Valentina, Sainz-Pérez, María, Cuesta Cocera, Juan F., and García-Fuentes, Antonio
- Subjects
OLIVE growing ,ORGANIC farming ,AGRICULTURE ,CICADAS ,OLIVE - Abstract
Although cicadas have traditionally been considered pests of little or no importance, in recent decades, an increase in damages is being recorded in olive groves of southern Spain. New agricultural practices that affect soil management are behind it. During 2024, intensive sampling has been carried out in an organic grove with herbaceous cover (VC2), and in a second one with mixed vegetation cover (VC1, in which the crushed remains of the annual pruning are added). In both ecological groves, inventories of the vegetation have been carried out, as well as intensive sampling in the olive canopy, with the densities of oviposition injuries being recorded and compared with respect to conventional management (CONV). The objectives of this study are to compare the three managements based on the density of oviposition injuries, to determine the priority areas for cicadas' oviposition within the trees; and to develop a sampling method to assess damage over large areas. The results show significant increases in the density of injuries in organic groves, with maximum values recorded in the olive grove with mixed cover. Oviposition injuries show an altitudinal gradient distribution, with maximum values in the lower zone of the trees. The factors involved are discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
30. Hydroxyproline in Urine Microvesicles as a Biomarker of Fibrosis in the Renal Transplant Patient.
- Author
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Torres Sánchez, María José, Ruiz Fuentes, María Carmen, Clavero García, Elena, Rísquez Chica, Noelia, Espinoza Muñoz, Karla, Espigares Huete, María José, Caba Molina, Mercedes, Osuna, Antonio, and Wangensteen, Rosemary
- Subjects
IMINO acids ,RENAL fibrosis ,CHRONIC kidney failure ,HYDROXYPROLINE ,RENAL biopsy ,KIDNEY transplantation - Abstract
Background/Objectives: Interstitial fibrosis/tubular atrophy in kidney transplantation is an unspecific lesion induced by immune and non-immune factors, which determines the progression of chronic kidney disease. Hydroxyproline is an imino acid that is part of the molecule of collagen. The aim of this study was to assess hydroxyproline in urine microvesicles as a marker of fibrosis in the renal transplant patient. Patients and Methods: An observational cross-sectional study was conducted on 46 renal transplant patients who had undergone renal biopsy with diagnostic intention, as well as 19 healthy controls. Clinical, histological, and laboratory variables were collected at the time of marker determination and renal function was analyzed 2 years later. Hydroxyproline was measured in urine microvesicles. Results: Renal transplant patients showed a higher microvesicular concentration of hydroxyproline compared to the control group, with the following medians (interquartile range (IQR)): 28.024 (5.53) ng/mL vs. 2.51 (1.16) ng/mL, p < 0.001. In the transplanted patients, patients in whom biopsy showed some score of total cortical parenchymal inflammation (ti) displayed a significantly higher concentration of hydroxyproline in urine microvesicles than those patients who did not score for cortical parenchymal inflammation (29.91 ± 2.797 ng/mL vs. 22.72 ± 8.697 ng/mL, p = 0.034). No significant correlation was observed between urinary markers and serum creatinine, calcium, and parathyroid hormone (PTH). Conclusions: The concentration of hydroxyproline in urinary microvesicles increased in renal transplant patients relative to healthy controls. Hydroxyproline in urinary microvesicles is a marker of chronic renal inflammation in transplanted patients, and further studies are required to confirm this finding in other pathologies, as well as the association with fibrosis and the evolution of renal function. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
31. Patents of Systems and Methods Using Non-Ionizing Radiation for Measuring Rearfoot Deformations: A Review.
- Author
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Trujillo-Hernández, Gabriel, Flores-Fuentes, Wendy, Ramírez-Hernández, Luis Roberto, Sergiyenko, Oleg, Castro-Toscano, Moises J., Mercado-Herrera, Abelardo, and Murrieta-Rico, Fabian N.
- Subjects
NONIONIZING radiation ,JOINT pain ,MEASUREMENT errors ,ELECTRONIC equipment ,ELECTRONIC measurements - Abstract
Individuals' lifestyles are affected by valgus and varus deformities in the rearfoot, causing pain in the joints and plantar surface due to the misalignment between the tibial and calcaneus. In orthopedics, medical professionals measure this misalignment by using X-ray systems and goniometers. The X-ray emits ionizing radiation that can cause damage through cumulative exposure over a lifetime, whereas the goniometer will produce measurement errors. This patent review conducted a technological search of systems and methods across various databases using inclusion and exclusion criteria. These thirty-five obtained patents provide valuable information about mechanical, electronic, and mechatronic technologies and non-ionizing radiation to evaluate valgus and varus deformities. The patents are classified into stationary mechanisms, stationary electronic devices, dynamic mechanisms, dynamic electronic devices, stationary mechatronic devices, and dynamic mechatronic devices. They are further categorized based on their measurement methods as either visual or automatic. Additionally, the patents are grouped by usage mode into sitting, standing, and walking. This patent review aims to provide medical professionals with little-known techniques for measuring and evaluating the rearfoot alignment. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
32. Variations in Some Features of Oral Health by Personality Traits, Gender, and Age: Key Factors for Health Promotion.
- Author
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Fuentes, Allexey Martínez, Romo-González, Tania, Huesca-Domínguez, Israel, Campos-Uscanga, Yolanda, and Barranca-Enríquez, Antonia
- Subjects
HUMAN body ,HEALTH facilities ,HEALTH behavior ,PERSONALITY ,DENTAL offices ,DENTAL education - Abstract
Background: Oral diseases remain among the most common non-communicable diseases worldwide, affecting almost half of the world's population. This is partly because there has been a separation of the mouth from the rest of the body and human health, and psychological aspects such as personality, thoughts, and emotions are not taken into account in the dental office. The objective was to analyze the relationship between oral health conditions and personality traits in adult patients who underwent dental treatment at the Center for Health Studies and Services. Methods: This was a descriptive, observational, and correlational study, carried out at the Center for Health Studies and Services. A total of 184 patients who attended the dentistry area in the period from October 2022 to May 2023 participated in the study, of which 59.78% were women and 40.21% men. The age of the population was 18 to 79 years, with the age range of 21–40 years being the most prevalent (48.37%). Results: The results show that although the hygiene of the population treated was good (0.77 ± 0.79) and that the perception of oral health was positive (14.34 ± 9.43), the means and percentages of oral pathologies and parafunctional habits were high (i.e., DMFT: 9.98 ± 5.40; attrition: 87.50%; onychophagia: 45.10%). It is noteworthy that both the correlation, network, multiple line regression, and logistic regression analyses showed associations of the personality, gender, and age variables with a history of caries and oral hygiene as well as with parafunctional habits. Conclusions: Therefore, variations in both the personality and the age and gender of the patients treated have repercussions on oral health conditions, which can be used in the prevention of oral diseases and in health promotion. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
33. Navigating Uncertainty: The Role of Mood and Confidence in Decision-Making Flexibility and Performance.
- Author
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Lavín, Claudio, García, Roberto, and Fuentes, Miguel
- Subjects
DYNAMIC balance (Mechanics) ,TASK performance ,LEARNING strategies ,EMOTIONS ,METACOGNITION - Abstract
Dealing with uncertainty is a pivotal skill for adaptive decision-making across various real-life contexts. Cognitive models suggest that individuals continuously update their knowledge based on past choices and outcomes. Traditionally, uncertainty has been linked to negative states such as fear and anxiety. Recent evidence, however, highlights that uncertainty can also evoke positive emotions, such as surprise, interest, excitement, and enthusiasm, depending on one's task expectations. Despite this, the interplay between mood, confidence, and learning remains underexplored. Some studies indicate that self-reported mood does not always align with confidence, as these constructs evolve on different timescales. We propose that mood influences confidence, thereby enhancing decision flexibility—defined as the ability to switch effectively between exploration and exploitation. This increased flexibility is expected to improve task performance by increasing accuracy. Our findings support this hypothesis, revealing that confidence modulates exploration/exploitation strategies and learning rates, while mood affects reward perception and confidence levels. These findings indicate that metacognition entails a dynamic balance between exploration and exploitation, integrating mood states with high-level cognitive processes. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
34. West Nile Virus: An Update Focusing on Southern Europe.
- Author
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Carrasco, Lara, Utrilla, Maria Jose, Fuentes-Romero, Beatriz, Fernandez-Novo, Aitor, and Martin-Maldonado, Barbara
- Subjects
WEST Nile fever ,WEST Nile virus ,BIRD populations ,POPULATION dynamics ,MIGRATORY birds ,MOSQUITOES - Abstract
West Nile Virus (WNV) is a zoonotic, vector-borne pathogen affecting humans and animals, particularly in Europe. The virus is primarily transmitted through mosquitoes that infect birds, which serve as the main reservoirs. Humans and horses are incidental hosts. This review focuses on the epidemiology of WNV in southern Europe, particularly its increasing prevalence. Methods included an extensive literature review and analysis of recent outbreaks. WNV is largely asymptomatic in humans, but a small percentage can develop West Nile neuroinvasive disease (WNND), leading to severe neurological symptoms and fatalities. Horses can also suffer from neurological complications, with high mortality rates. Climate change, migratory birds, and mosquito population dynamics contribute to the virus spread across Europe. Control efforts focus on vector management, and while vaccines are available for horses, none has been approved for humans. Surveillance, particularly of bird and mosquito populations, and further research into the virus molecular structure are crucial for understanding and mitigating future outbreaks. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
35. Rhizobacteria Enterobacter sp. LHB11 and Bacillus sp. PIXIE Induced Systemic Tolerance Against Drought Stress in Tomato (Solanum lycopersicum).
- Author
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Muñoz-Carvajal, Eduardo, González, Máximo, Fuentes, Yihajara, Oetiker, Nia, Giordano, Ady, and Stoll, Alexandra
- Subjects
PLANT growth-promoting rhizobacteria ,INDOLEACETIC acid ,VOLATILE organic compounds ,PLANT metabolism ,ATMOSPHERIC nitrogen ,TOMATOES - Abstract
Plant growth-promoting rhizobacteria (PGPR) induce changes in the plant metabolism, improving plant growth under drought stress conditions by employing different mechanisms of interaction. In this study, two bacterial strains (Enterobacter sp. LHB11 and Bacillus sp. PIXIE) were evaluated in vitro regarding their PGPR traits, including the ACC-Deaminase enzyme activity. Both PGPR strains produced indole acetic acid (40.65–75.81 µg
−1 mL−1 ), exopolysaccharides (39.23–40.20 µg eq CR mL−1 ), proline (61.5–106.1 mM), and volatile organic compounds. Furthermore, both solubilized phosphate (1.15–1.53 ratio, halo/colony) and fixed the atmospheric nitrogen. Only LHB11 showed ACC-Deaminase activity. Furthermore, both strains tolerated osmotic stress induced in liquid media with up to 20% of Polyethylene glycol-6000. In a drought stress pot experiment, both strains were applied to tomato roots, exposed to normal irrigation (100%) and drought stress (decreasing irrigation by 50%). The inoculation of both strains improved the plant growth parameters under stress conditions significantly, e.g., the root dry weight (+41.0–43.4%), while the proline content decreased to a level similar to the unstressed control. In addition, strain inoculation increased the total phenolic content and the antioxidant capacity measured as the inhibitions of the ABTS radical and as the reduction in ferric ions and increased the catalase and ascorbate peroxidase enzyme activity. The bacterial contribution to the changes in biochemical parameters is higher than in morphological parameters. At the same time, the strains modulate specific parameters depending on the stress condition, e.g., ABTS, catalase activity, and proline content. In conclusion, both strains Induced Systemic Tolerance (IST), regardless of their capacity to use the ACC-Deaminase mechanism, by modulating several mechanisms of plant response to drought stress. Our results showcase the relevance of considering the orchestration of several plant response mechanisms in order to fully assess the potential and efficiency of the plant–PGPR interaction under drought stress. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
36. Macroalgae Compound Characterizations and Their Effect on the Ruminal Microbiome in Supplemented Lambs.
- Author
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De la Cruz Gómez, Adriana Guadalupe, Campos-García, Huitzimengari, Mendoza, German D., García-López, Juan Carlos, Álvarez-Fuentes, Gregorio, Hernández-García, Pedro A., Jiménez, José Alejandro Roque, Cifuentes-Lopez, Oswaldo, Relling, Alejandro E, and Lee-Rangel, Héctor A.
- Subjects
RED algae ,BROWN algae ,GIANT kelp ,CELLULOLYTIC bacteria ,METHANOGENS - Abstract
Simple Summary: Mexico ranked among the ten countries with the highest GHG production in 2017, reporting a contribution of 1.68% of global emissions; in this sense, it has committed to reducing GHG emissions by up to 22% by 2030 (Government of Mexico, 2015). The First National Tier 2 Inventory of methane emissions from enteric fermentation of cattle in Mexico, registering 2039.21 ± 205.5 Gg of CH4 per year. Currently, most studies on livestock and climate change in Latin America are focused on quantifying CH4 emission volumes, determining emission factors, and calculating national inventories; few studies focus on the development of mitigation strategies; many positive attributes of macroalgae have been identified concerning contributing nutrients such as protein and also in the energy metabolism of animals of livestock interest. Some in vitro studies have shown that red and brown macroalgae can reduce CH4 production by controlling the populations of methanogenic bacteria in the rumen. The impact of macroalgae species on rumen function remains largely unexplored. This present study aimed to identify the biocompounds of the three types of marine macroalgae described: Macrocystis pyrifera (Brown), Ulva spp. (Lettuce), Mazzaella spp. (Red) and their effect on species-specific modulations of the rumen microbiome. The macroalgae were characterized using GC-MS. Twelve Rambouillet lambs were randomly assigned to one of four experimental diets (n = 3 per treatment): (a) control diet (CD); (b) CD + 5 g of Red algae; (c) CD + 5 g of Brown algae; and (d) CD + 5 g of Lettuce algae. After the lambs ended their fattening phase, they donated ruminal fluid for DNA extraction and 16S rRNA gene V3 amplicon sequencing. Results: The tagged 16S rRNA amplicon sequencing and statistical analysis revealed that the dominant ruminal bacteria shared by all four sample groups belonged to phyla Firmicutes and Bacteroidota. However, the relative abundance of these bacterial groups was markedly affected by diet composition. In animals fed with macroalgae, the fibrinolytic and cellulolytic bacteria Selenomonas was found in the highest abundance. The diversity in chemical composition among macroalgae species introduces a range of bioactive compounds, particularly VOCs like anethole, beta-himachalene, and 4-ethylphenol, which demonstrate antimicrobial and fermentation-modulating properties. [ABSTRACT FROM AUTHOR]
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- 2024
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37. Development and Psychometric Properties of a Scale of Teachers' Coping Strategies Towards the Evaluation of Performance in Public Schools.
- Author
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Chambilla-Apaza, Jocabeth Nohemi, Merchan-Fuentes, Ailyn Yicela, Cunza-Aranzábal, Denis Frank, and Abanto-Ramírez, Carlos D.
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CAREER development ,EDUCATIONAL quality standards ,EXPLORATORY factor analysis ,CONFIRMATORY factor analysis ,ELEMENTARY education - Abstract
Teaching evaluation performance is an important policy adopted by the governing body of education in Peru to promote the growth of educational quality, professional development, and continuous training of teachers, as well as to ensure educational quality standards, especially in Peruvian elementary education. Therefore, this research aims to develop and evaluate the psychometric properties of a scale that measures the coping strategies adopted by elementary education teachers when evaluating their performance. A study was conducted with 317 teachers between 20 and 70 years old (M = 43.6, SD = 11.8) in public education, from preschool (10.4%) to secondary (24.9%) educational levels, including special and alternative education, and with employment status of contracted (46.1%) and appointed (53.9%). An exploratory factor analysis was performed, from which four factors emerged. These factors were then corroborated by confirmatory factor analysis (χ
2 = 162, df = 13, CFI = 0.968, TLI = 0.961, RMSEA = 0.061, and SRMR = 0.056) and were named as follows: maladaptive coping, adaptive individual coping, religious coping, and instrumental support coping. Internal reliability was high for the full scale and dimensions (α and ω > 0.8), indicating that it was free of random error, yielding the same results across multiple applications for the same sample. It is concluded that the scale of teachers' coping strategies towards the evaluation of performance (STCEP) is a valid and reliable instrument to measure coping strategies adopted by elementary education teachers in response to performance evaluation. [ABSTRACT FROM AUTHOR]- Published
- 2024
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38. Thoracic Extradural Psammomatous Meningioma on T6–T8: A Case Report and Literature Review.
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Albavera-Gutiérrez, Roberto Renan, Espíndola-Rodríguez, Arturo, Castro-Fuentes, Carlos Alberto, Martínez, Ana Karen Aguayo, Valencia-Ledezma, Omar Esteban, Salgado-Camacho, Juan Manuel, Mendoza, Luis Bernal, and Nava, Ernesto Nuñez
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MUSCLE strength testing ,SURGICAL emergencies ,TUMOR surgery ,SURGICAL excision ,BORING & drilling (Earth & rocks) ,STRENGTH training - Abstract
Tumors of the spine are rare, with an incidence of 1.0 and 1.5 per 100,000 individuals. A 44-year-old female patient underwent emergency surgery for posterior decompression and tumor resection. A 3-level laminectomy was performed from T6 to T8 using the Medtronic Midas Rex drill and a 5 mm diamond drill, with microsurgical resection of the lesion. A new resection was performed one week later to address a residual tumor located towards the rostral and cephalic levels. A sample of the extradural lesion was obtained and was sent to the Pathology Department of the Hospital Regional de Alta Especialidad de Ixtapaluca (HRAEI) for histopathological diagnosis, reporting Grade 1 psammomatous meningioma according to the WHO's criteria. Our patient's rehabilitation treatment consisted of two parts. The first part occurred during her hospital stay, before and after surgery, and upon her discharge. At the first outpatient consultation three weeks after surgery, the patient showed improved strength in the lower extremities, scoring 4/5 on the Daniel's scale muscle strength test. After one year of follow-up, our patient has recovered muscle strength. This allows her to move freely, scoring 5/5 on the Daniel's scale muscle strength test. [ABSTRACT FROM AUTHOR]
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- 2024
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39. The Impact of Dog-Assisted Therapy Among Children and Adolescents with Autism Spectrum Disorder: A Systematic Review.
- Author
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Galvany-López, Paula, Martí-Vilar, Manuel, Hidalgo-Fuentes, Sergio, and Cabedo-Peris, Javier
- Abstract
Background and Objectives: Animal-assisted therapies have been utilized in various profiles to improve people's quality of life. This systematic review aims to assess the impact of dog-assisted therapies (DAT) on children and adolescents with Autism Spectrum Disorder (ASD). The benefits provided, the feasibility of implementation, and potential limitations are analysed. Methods: An exhaustive search was carried out in the following databases: Web of Science (WoS), Scopus, ERIC, PubMed, PubPsych, CINAHL, PsycInfo and Dialnet. The procedure was preregistered on PROSPERO. Results: This review included 19 scientific articles. Of these, 84% suggest that DAT has a positive impact on communication and social interaction during the development of children and adolescents diagnosed with ASD. The dog is often perceived as a communication facilitator that serves as a reinforcer, capturing the individual's attention. Emotional benefits have also been reported, including reducing stereotyped and self-harming behaviours. Additionally, an increase in smiling frequency and self-esteem levels was observed. Conclusions: These findings highlight the potential of DAT as a component of socio-educational intervention for children and adolescents diagnosed with ASD. However, further research is necessary due to the limited sample sizes in the studies reviewed. [ABSTRACT FROM AUTHOR]
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- 2024
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40. Complexity Assessment in Projects Using Small-World Networks for Risk Factor Reduction.
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Álvarez-Espada, Juan-Manuel, Fuentes-Bargues, José Luis, Sánchez-Lite, Alberto, and González-Gaya, Cristina
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SEWAGE disposal plants ,FUZZY integrals ,FUZZY logic ,COST overruns ,PROJECT managers - Abstract
Despite following standard practices of well-known project management methodologies, some projects fail to achieve expected results, incurring unexplained cost overruns or delays. These problems occur regardless of the type of project, the environment, or the project manager's experience and are characteristic of complex projects. Such projects require special control using a multidimensional network approach that includes contractual aspects, supply and resource considerations, and information exchange between stakeholders. By modelling project elements as nodes and their interrelations as links within a network, we can analyze how components evolve and influence each other, a phenomenon known as coevolution. This network analysis allows us to observe not only the evolution of individual nodes but also the impact of their interrelations on the overall dynamics of the project. Two metrics are proposed to address the inherent complexity of these projects: one to assess Structural Complexity (SC) and the other to measure Dynamic Complexity (DC). These metrics are based on Boonstra and Reezigt's studies on the dimensions and domains of complex projects. These two metrics have been combined to create a Global Complexity Index (GCI) for measuring project complexity under uncertainty using fuzzy logic. These concepts are applied to a case of study, the construction of a wastewater treatment plant, a complex project due to the intense interrelations, the integration of new technologies that require R&D, and its location next to a natural park. The application of the GCI allows constant monitoring of dynamic complexity, thus providing a tool for risk anticipation and decision support. Also, the integration of fuzzy logic in the model facilitates the incorporation of imprecise or partially defined information. It makes it possible to deal efficiently with the dynamic variation of complexity parameters in the project, adapting to the inherent uncertainties of the environment. [ABSTRACT FROM AUTHOR]
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- 2024
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41. Bioassays with Allium cepa for the Monitoring of Toxicity in the Groundwater of Yucatan, Mexico.
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Cauich-Suárez, Loremy Yehudí, Sánchez-Sánchez, Víctor Emmanuel, Moreno-Ortiz, Gissela, Noreña-Barroso, Elsa, and Rodríguez-Fuentes, Gabriela
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POISONS ,ONIONS ,POLLUTANTS ,FLUORANTHENE ,WATER quality - Abstract
Featured Application: Low-cost method for the assessment of the presence of cytotoxic and genotoxic contaminants in water. This study employed the Allium cepa bioassay to evaluate the toxic effects of contaminants in the Yucatan aquifer. Seven monitoring wells were studied during September and October 2021. Nutrient concentrations showed significant variation between sites, with samples closer to the coast (P3 and P7) presenting higher ammonia and phosphate concentrations. The pesticides found at the highest concentration were δ-HCH and chlorpyrifos, with 141.44 and 175.92 ng/L, respectively. Heptachlor and aldrin were present in sites P4oct and P2sept. Interestingly, DDT values were highly correlated with caffeine concentrations. The PAHs acenaphthylene and the sum of B(k)fluoranthene and B(b)fluoranthene presented the highest prevalence. B(k)fluoranthene and B(b)fluoranthene were the PAHs found at the highest concentration. The results of the A. cepa bioassay indicated no nuclear abnormalities. The study also found no statistical differences in the mitotic index, root length, biomarkers of oxidative stress, and inhibition of B-esterases between sites and controls. In summary, the wells sampled in the present study had low concentrations of contaminants that can be used as a proxy of anthropogenic discharges; the lack of effect in the biomarkers used at organism, cellular, and biochemical levels indicated no toxic effect on A. cepa roots. [ABSTRACT FROM AUTHOR]
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- 2024
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42. Germination Strategies and Seed Quality of Colobanthus quitensis : Implications for Sustainable Antarctic Ecosystems and Ex Situ Plant Conservation.
- Author
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Ontivero, Yadiana, Cuba-Díaz, Marely, Fuentes-Lillo, Eduardo, and Convey, Peter
- Abstract
The conservation of the Antarctic ecosystem is linked to scientific and tourism activities. The Colección Activa de Plantas Vasculares Antárticas at the Universidad de Concepción aims to help conserve the region's vascular flora to support scientific research while minimizing anthropogenic pressure on natural ecosystems. Colobanthus quitensis is the only native dicotyledonous plant native to Antarctica and, as an extremophilic plant, is capable of withstanding extreme abiotic conditions. This species has potentially important use as a biological model to study the physiological deterioration of dormant seeds and other traits, some of which may contribute to vegetation development in Antarctica. Although studies have addressed the reproduction and germination of C. quitensis, there is no recent synthesis of information regarding its reproductive biology and seed traits that could support its conservation. This work synthesizes and critically analyzes the current knowledge of C. quitensis reproduction in natural and controlled environments, identifying factors that contribute to the decline in seed quality. We propose that growth conditions, seed morphology, and interactions with endophytic fungi influence germination and seedling establishment. We also highlight critical knowledge gaps that must be addressed to better understand the species' phenology, the impact of biotic and abiotic factors on its development, strategies for seed conservation, and biotechnological applications. [ABSTRACT FROM AUTHOR]
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- 2024
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43. Silver Nanoparticles as a Potent Nanopesticide: Toxic Effects and Action Mechanisms on Pest Insects of Agricultural Importance—A Review.
- Author
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Martínez-Cisterna, Daniel, Rubilar, Olga, Tortella, Gonzalo, Chen, Lingyun, Chacón-Fuentes, Manuel, Lizama, Marcelo, Parra, Pablo, and Bardehle, Leonardo
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POISONS ,INSECT pests ,SILVER nanoparticles ,LIFE cycles (Biology) ,AGRICULTURE - Abstract
Nanotechnology has been a promising plant protection discipline in recent years, attributed to the unique physicochemical properties exhibited at the nanoscale. In this context, silver nanoparticles (AgNPs) have been effective in various applications, including medical, industrial, and agronomic, and during the last few years, the control of insect pests has raised great interest. The present review mainly provides updated information about the use of AgNPs elaborated by different synthesis methods, such as biological (plants, microorganisms), physical, and chemical, and their effect against various insect species of agricultural importance belonging to the order Diptera, Coleoptera, Lepidoptera, and Hemiptera. The physiological and toxic effects of applying AgNPs are reported and characterized by developmental problems, mortality, weight reduction, interference with enzymatic activity, and anomalies in the life cycle. Moreover, in the final section, the action mechanisms through which AgNPs act on insects are also discussed, highlighting mechanisms such as alteration of transmembrane permeability, interruption of DNA replication, alteration of protein synthesis, and production of reactive oxygen species (ROS). [ABSTRACT FROM AUTHOR]
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- 2024
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44. A Hyper-Parameter Optimizer Algorithm Based on Conditional Opposition Local-Based Learning Forbidden Redundant Indexes Adaptive Artificial Bee Colony Applied to Regularized Extreme Learning Machine.
- Author
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Vasquez-Iglesias, Philip, Pizarro, Amelia E., Zabala-Blanco, David, Fuentes-Concha, Juan, Ahumada-Garcia, Roberto, Laroze, David, and Gonzalez, Paulo
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ARTIFICIAL neural networks ,EXTREME learning machines ,SUPPORT vector machines ,METAHEURISTIC algorithms ,ALGORITHMS - Abstract
Finding the best configuration of a neural network's hyper-parameters may take too long to be feasible using an exhaustive search, especially when the cardinality of the search space has a big combinatorial number of possible solutions with various hyper-parameters. This problem is aggravated when we also need to optimize the parameters of the neural network, such as the weight of the hidden neurons and biases. Extreme learning machines (ELMs) are part of the random weights neural network family, in which parameters are randomly initialized, and the solution, unlike gradient-descent-based algorithms, can be found analytically. This ability is especially useful for metaheuristic analysis due to its reduced training times allowing a faster optimization process, but the problem of finding the best hyper-parameter configuration is still remaining. In this paper, we propose a modification of the artificial bee colony (ABC) metaheuristic to act as parameterizers for a regularized ELM, incorporating three methods: an adaptive mechanism for ABC to balance exploration (global search) and exploitation (local search), an adaptation of the opposition-based learning technique called opposition local-based learning (OLBL) to strengthen exploitation, and a record of access to the search space called forbidden redundant indexes (FRI) that allow us to avoid redundant calculations and track the explored percentage of the search space. We set ten parameterizations applying different combinations of the proposed methods, limiting them to explore up to approximately 10% of the search space, with results over 98% compared to the maximum performance obtained in the exhaustive search in binary and multiclass datasets. The results demonstrate a promising use of these parameterizations to optimize the hyper-parameters of the R-ELM in datasets with different characteristics in cases where computational efficiency is required, with the possibility of extending its use to other problems with similar characteristics with minor modifications, such as the parameterization of support vector machines, digital image filters, and other neural networks, among others. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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45. Serum 25-Hydroxyvitamin D Levels and Disease Activity in Patients with Systemic Lupus Erythematosus: An Exploratory Study in Western Mexico.
- Author
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Deossa-Piedrahita, Daniela, Vicente-Hernández, Berenice, Ramírez-Ochoa, Sol, Ambriz-Alarcón, Mauricio Alfredo, Cervantes-Pérez, Gabino, Cervantes-Guevara, Gabino, González-Ojeda, Alejandro, Fuentes-Orozco, Clotilde, Hernández-Mora, Francisco Javier, Zepeda-Gutiérrez, Luis Asdruval, Michel-González, Jorge Isaac, Vázquez-Beltrán, Janet Cristina, and Cervantes-Pérez, Enrique
- Subjects
SYSTEMIC lupus erythematosus ,VITAMIN D ,DEFICIENCY diseases ,MEXICANS ,SIGNIFICANT others - Abstract
Background and objectives: The correlation between diminished 25-hydroxyvitamin D (25-(OH)D) concentrations and heightened disease activity in systemic lupus erythematosus (SLE) patients remains contentious, as clinical studies have yielded conflicting outcomes—some propose a potential link, while others assert no relationship exists. Nonetheless, all studies report a significant prevalence of low 25-(OH)D levels among SLE patients. This study aimed to assess the frequency of low serum levels of 25-(OH)D in Mexican patients with SLE and to evaluate the correlation between 25-(OH)D deficiency or insufficiency and disease activity levels. Materials and Methods: This retrospective analysis comprised patients admitted to our hospital from November 2022 to October 2023, diagnosed with SLE, and had their serum 25-(OH)D levels tested upon admission. The frequency of low levels of 25-(OH)D was assessed, and clinical and demographic data were gathered to examine potential causes linked to 25-(OH)D deficiency or insufficiency. Results: A total of 61 patients were included, and 87% (n = 53) had low serum 25-(OH)D levels. Patients with 25-(OH)D deficiency (n = 21) were significantly younger (mean 23 vs. 39 years, p = 0.04) and had higher protein levels in 24 h urine protein (1.8 vs. 1.1 g/24 h, p = 0.006) than patients who presented only 25-(OH)D insufficiency, without significant differences in other indicators of disease activity. Conclusions: In this investigation, patients with SLE exhibited a high frequency of low serum levels of 25-(OH)D, consistent with existing literature; however, no significant correlations were identified between 25-(OH)D levels and indicators of disease activity. These findings require validation in subsequent research. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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46. Substance Use and Mental Health in Emerging Adult University Students Before, During, and After the COVID-19 Pandemic in Mexico: A Comparative Study.
- Author
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Hernandez-Fuentes, Gustavo A., Romero-Michel, Jessica C., Guzmán-Sandoval, Veronica M., Diaz-Martinez, Janet, Delgado-Enciso, Osiris G., Garcia-Perez, Ruth R., Godínez-Medina, Monserrat, Zamora-Barajas, Vicente, Hilerio-Lopez, Angel G., Ceja-Espiritu, Gabriel, Toro-Equihua, Mario Del, Martinez-Fierro, Margarita L., Garza-Veloz, Idalia, Rodriguez-Sanchez, Iram P., Sanchez-Ramirez, Carmen A., Ramirez-Flores, Mario, and Delgado-Enciso, Ivan
- Subjects
STUDENT health ,MENTAL health of students ,MENTAL health ,TRANSITION to adulthood ,TOBACCO use - Abstract
Background: The COVID-19 pandemic significantly impacted mental health and substance use patterns, particularly among young adults. Objective: This study aimed to assess changes in anxiety, depression, self-esteem, and substance use among university students in Mexico before, during, and after the pandemic. Methods: Using a repeated cross-sectional design, this study was conducted with university students in Mexico across three periods: pre-pandemic (2017 and 2019); during the pandemic (2021); and post-pandemic (2023). A total of 2167 students were interviewed during one of the three periods. Standardized scales measured anxiety, depression, self-esteem, Erotic Response and Sexual Orientation Scale (EROS), and substance use. Results: showed a marked and significant increase in the proportion of students with anxiety (40.0%, 71.7%, and 79.6%) and depression (14.4%, 61.9%, and 62.6%) during the pre-pandemic, pandemic, and post-pandemic periods, respectively. Self-esteem significantly decreased during and after the pandemic, compared to pre-pandemic, particularly among females. The proportion of students categorized as moderate/high-risk for their substance use changed over time, showing a reduction in alcohol use (from 29.9% to 20.2%) and tobacco use (from 26.0% to 18.2%) but an increase in sedative use (from 7.1% to 11.7%), before vs after the pandemic, respectively. Multivariate analysis revealed that anxiety, low self-esteem, and increased sedative use were consistently linked to a heightened risk of depression during and after the pandemic. Notably, anxiety and depression levels remained in a proportion significantly elevated even in the post-pandemic period. Conclusions: These findings underscore the enduring impact of the COVID-19 pandemic on the mental health of university students, highlighting the urgent need for targeted interventions, early detection strategies, and customized educational programs to effectively support students' mental well-being in the ongoing post-pandemic era. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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47. Bioactive Content and Antioxidant Properties of Spray-Dried Microencapsulates of Peumus boldus M. Leaf Extracts.
- Author
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Polanco, Valentina, Cerdá-Bernad, Débora, Quispe-Fuentes, Issis, Bernal, Claudia, and López, Jéssica
- Subjects
RESPONSE surfaces (Statistics) ,PHENOLS ,OXIDANT status ,SCANNING electron microscopy ,ENDEMIC plants - Abstract
Boldo (Peumus boldus M.), an plant endemic to central and southern Chile, has been recognized as a medicinal herb, especially its leaves that are rich in bioactive compounds with beneficial properties, such as antioxidant, anti-inflammatory, sedative, and antimicrobial properties, among others. This research aimed to evaluate solid-liquid extraction using a response surface methodology to obtain phenolic-rich extracts from boldo leaves and to encapsulate them through spray-drying. A Box-Behnken design was applied to optimize extraction process variables (temperature, time, and solid-liquid ratio). Extracts were characterized in terms of their total phenolic content, with the maximum value obtained being 37.78 mg GAE/g using extraction conditions of a temperature of 100 °C, a time of 60 min, and a solid-liquid ratio of 1:100. The developed microcapsules containing the optimal boldo extracts were characterized (moisture, water activity, scanning electron microscopy, zeta potential, FTIR, total phenolic compounds, antioxidant capacity, and phenolic profile by HPLC-DAD), highlighting their high phenolic content (5.38–5.49 mg GAE/g) and antioxidant capacity, as well as their bioactive content in terms of catechin (445 ± 37 mg/100 g), pyrogallol (304 ± 24 mg/100 g), and epigallocatechin (156 ± 12 mg/100 g). Overall, this study revealed an efficient technique by which to isolate and stabilize bioactive compounds from boldo leaves, with the microcapsules being promising candidates as high added-value ingredients. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
48. First-Line (1L) Treatment Decision Patterns and Survival of Hormone Receptor (HR)-Positive/HER2-Negative Advanced Breast Cancer (ABC) Patients in a Latin American (LATAM) Public Institution.
- Author
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Valencia, Guillermo, Rioja, Patricia, Chirito, Miguel, Peralta, Olenka, Sánchez, Jorge, Rabanal, Connie, Mantilla, Raúl, Morante, Zaida, Fuentes, Hugo, Castaneda, Carlos, Vidaurre, Tatiana, Pacheco, Cristian, Neciosup, Silvia, and Gomez, Henry L.
- Subjects
METASTATIC breast cancer ,OVERALL survival ,HORMONE therapy ,CANCER chemotherapy ,HORMONE receptors - Abstract
Advanced breast cancer is an incurable disease, with a median overall survival of 3 years, including in countries without access problems. Although chemotherapy is reserved in some cases, it is still used in many countries as a first-line therapy. The aim of our study is to evaluate the first-line treatment choices and the factors that influence therapeutic decisions. A retrospective analysis was conducted of hormone receptor (+)/HER2 (−) advanced breast cancer patients classified into three groups according to the first-line and second-line treatment received: endocrine therapy–chemotherapy, endocrine therapy–endocrine therapy and chemotherapy–endocrine therapy. Additionally, we explored the overall survival of sequencing therapy groups. First-line chemotherapy was chosen in 34% of patients. Also, around 60% of our patients met the "aggressive disease" criteria from the RIGHT Choice trial, justifying the use of chemotherapy in a population with poor prognosis. Furthermore, de novo and progressive disease were prognostic factors that influenced the use of chemotherapy as a first-line treatment. Regarding overall survival, the sequencing treatment groups in this trial saw an increase in survival compared with patients of the MONALEESA trials (endocrine therapy alone arms). No significant differences in progression-free survival or overall survival were found in the treatment sequencing groups. There was a higher use of chemotherapy as a first-line therapy, with de novo and "aggressive disease" criteria being the main factors to influence the decision. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
49. Innovative Strategies and Transformations in the Montilla–Moriles Wine-Production Area: Adaptation and Success in the Global Market.
- Author
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Fuentes-García, Fernando J., Sánchez-Cañizares, Sandra M., González-Mohíno, Miguel, and Cabeza-Ramírez, L. Javier
- Subjects
DYNAMIC capabilities ,WINE industry ,WINE marketing ,TWENTY-first century ,EXPORT marketing - Abstract
This study examines the transformative changes in the wine industry of Southern Europe over recent decades, focusing on one of Spain's oldest Protected Designations of Origin (PDO), Montilla–Moriles. The region faced severe challenges during the second wave of globalization at the beginning of the 21st century. According to the 1999 Strategic Plan for this PDO, far-reaching strategic actions were needed; 25 years later, however, fewer than half of the original companies remain. To understand this complex issue, a qualitative analysis was conducted using case studies and in-depth interviews with key stakeholders in the sector. The paper presents several success stories featuring companies with strong dynamic capabilities: Bodegas Robles, Lagar de la Salud, and Tonelería del Sur–Casknolia. These companies were selected for their notable growth, contrary to the general industry trend, their diverse strategies, and their role in revitalizing the Montilla–Moriles wine market. Their success is attributed to a blend of traditional expertise, innovation, sustainability, and strategic internationalization. The findings of this study reveal that despite the industry's challenges, innovative initiatives can thrive by leveraging global market opportunities. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
50. Development and Validation of the Short Form (JAEN-10) of the Joint Assessment of Equilibrium and Neuromotor Status Scale (JAEN-20).
- Author
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Peinado-Rubia, Ana Belén, Osuna-Pérez, María Catalina, Núñez-Fuentes, David, Rodríguez-Almagro, Daniel, Zagalaz-Anula, Noelia, and Lomas-Vega, Rafael
- Subjects
CRONBACH'S alpha ,CHRONIC fatigue syndrome ,PSYCHOMETRICS ,DISABILITY evaluation ,FACTOR analysis - Abstract
Objectives: The objective of this study was to develop and validate the short version of The Joint Assessment of Equilibrium and Neuromotor Status Scale (JAEN scale) for use in women with Fibromyalgia Syndrome (FMS) to make the balance disorder measurement process more efficient. Methods: A cross-sectional observational validation study was conducted. Fifty-six women with FMS and forty-four healthy controls were included. Certain items from the original tool were selected with the aim of (1) improving internal consistency by reducing item redundancy and (2) obtaining a diagnostic capacity with an area under the ROC curve (AUC) greater than 0.70 for discriminating FMS patients and fallers. The internal consistency, factorial validity, concurrent validity and diagnostic capacity of the new tool were analyzed. Results: Factorial analysis showed a two-factor structure that explained 72% of the variance. Cronbach alpha coefficients of 0.904 were obtained for the total score of the JAEN-10 items. Concurrent validity analysis showed strong correlations of the JAEN-10 with other instruments that measured quality of life, postural balance or disability related to dizziness. The score of the JAEN-10 items showed an AUC of 0.858 with a sensitivity of 64.29 and a specificity of 95.45 for discriminating between FMS and healthy controls, and an AUC of 0.835 with a sensitivity of 90.48 and a specificity of 67.24 for discriminating between fallers and non-fallers. Conclusions: The 10-item JAEN scale is a valid instrument for discriminating between subjects with or without FMS and between fallers and non-fallers. Its psychometric properties are good and are similar to those of the original 20-item scale. Moreover, it is quicker to complete, which may be relevant for subjects with a tendency to experience fatigue. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
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