98 results on '"Carvalho RP"'
Search Results
2. Dois métodos diferentes para análise cinemática dos movimentos de cabeça durante a coordenação viso-cefálica de lactentes
- Author
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Lima, CD, primary, Carvalho, RP, additional, Barros, RML, additional, and Tudella, E, additional
- Published
- 2008
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3. Influência do nível de habilidade e posição corporal no alcance de lactentes
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Carvalho, RP, primary, Gonçalves, H, additional, and Tudella, E, additional
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- 2008
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4. Transient and steady decay of persistent photoconductivity in Si-doped AlxGa1-xAs
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Sampaio, Chaves, Ribeiro, Guimarães, de Carvalho RP, and de Oliveira AG
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- 1991
5. Feet care among diabetes mellitus patients.
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Carvalho RP, Carvalho CP, and Martins DA
- Published
- 2010
6. Two different methods for kinematic analysis of head movements relating to eye-head coordination in infants.
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Lima CD, Carvalho RP, Barros RML, and Tudella E
- Abstract
Background: Kinematic analysis is a method for quantitative assessment applied in different fields of study. In the field of motor development, this analysis may promote better understanding of the acquisition and development of motor skills. Objective: To develop and compare two experimental set-ups for kinematic analysis of head movements relating to eye-head coordination (EHC) in infants. Methods: Two experimental set-ups (A and B) were tested. They differed from each other regarding the numbers and locations of the cameras, and regarding the volume of the calibration system. Results: The accuracy of the two experimental set-ups was 2.47mm, thus indicating that both can provide realistic reconstructions of the movement. The three cameras used in set-up B made it possible to view the full range of motion with at least one of the cameras. This led to improvement of the qualitative analysis and reduction of the time taken to process quantitative data, which was 33% shorter than seen with set-up A. In addition, set-up B presented a better cost benefit relationship. Conclusions: Although both setups were adequate for kinematic analysis of head movements relating to EHC in infants, set-up B is more advantageous. The methodology far set-up B can be used in studies investigating head movements in either typical or atypical infants. The results from such studies could be used to complement assessments on at-risk Infants and consequently could assist in implementing early interventions. [ABSTRACT FROM AUTHOR]
- Published
- 2008
7. Influence of skill level and body position on infants' reaching.
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Carvalho RP, Gonçalves H, and Tudella E
- Abstract
Background: Although the development of reaching under different body position conditions has been widely studied, little research has addressed this issue considering the infant's skill level. Objective: To investigate how different body positions affect proximal and distal reaching adjustments among four to six-month-old infants. Methods: Ten infants classified as less (n=6) and more skilled (n=4) were evaluated both in the month when they acquired reaching abilities (Ml) and after one month of spontaneous practice (M2), in the supine (00), reclined (45 degrees) and seated (70 degrees) positions. Proximal (one or two-hand reaching) and distal (open, half-open or closed hand) adjustments, arm starting position (next to or away from the body) and grasping movements were analyzed. Results: One-hand reaching predominated among the more skilled infants. Less skilled infants showed higher frequency of one-hand reaching in Ml (seated) and M2 (supine and seated). Reaching with the hands half-open predominated, except among the more skilled infants in M2 in the reclined position. The less skilled infants presented hands next to the body in Ml (reclined and seated) and in M2 (reclined), while the more skilled ones started their reaching with hands away from the body in M2 (supine). The more skilled infants performed more reaching followed by grasping in M2, in the supine and seated positions. Conclusions: Body position affects proximal and distal adjustments to reaching maneuvers, according to the infant's skill level.Clinical Trial Registration Number (in a register validated according to the criteria established by WHO and ICMJE): ACTRN12607000507482a. [ABSTRACT FROM AUTHOR]
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- 2008
8. Effects of wrist orthoses in reducing pain in individuals with carpal tunnel syndrome: a systematic review.
- Author
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Figueiredo DS, Ariboni RR, Tucci HT, and Carvalho RP
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- Humans, Pain Management instrumentation, Pain Management methods, Pain Measurement, Randomized Controlled Trials as Topic, Treatment Outcome, Carpal Tunnel Syndrome diagnosis, Carpal Tunnel Syndrome rehabilitation, Orthotic Devices
- Abstract
Purpose: To examine the effectiveness of wrist orthoses in reducing pain in individuals with carpal tunnel syndrome., Materials and Methods: The searches were carried out in the CINAHL, Cochrane Library, EMBASE, Regional Portal of the Virtual Health Library, PubMed, Scopus, and Web of Science databases on 18 February 2021, and updated on 16 February 2023. Four independent evaluators performed the steps for inclusion of studies following the recommendations of the PRISMA and methods of the Cochrane Handbook for systematic review., Results: Three randomized clinical trials, two quasi-randomized clinical trials and one cohort study met the inclusion criteria. The visual analogue scale and numeric analog scale were used as a tool to assess pain outcome. The treatment period ranged from 2 weeks to 3 months. The period of use varied between nighttime only, and nighttime plus daytime. Most orthoses promoted a statistically significant reduction in intensity pain at night, at rest or during activities. Only one study carried out follow-up after the end of treatment and showed that pain reduction was maintained up to 6 months after treatment., Conclusions: The findings suggest that the isolated use of orthoses were effective in reducing pain in individuals with carpal tunnel syndrome.
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- 2024
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9. Evaluation of Anti-Thyroperoxidase (A-TPO) and Anti-Thyroglobulin (A-Tg) Antibodies in Women with Previous Hashimoto's Thyroiditis during and after Pregnancy.
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Zaccarelli-Marino MA, Dsouki NA, de Carvalho RP, and Maciel RMB
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Background/Objective: Autoimmune thyroid diseases (AITD) affect 2 to 5% of the general population. This study aimed to determine changes in activity of A-Tg and A-TPO antibodies before, during, and after pregnancy in women with previous AITD. Methods: This was a single-center study with a retrospective review of the medical records of 30 female patients aged 25-41 years who came to our endocrinology service in the city of Santo André, state of São Paulo, Brazil, to investigate thyroid diseases. The following data were reviewed: total triiodothyronine (totalT3), total thyroxine (totalT4), free thyroxine (FT4), thyroid-stimulating hormone (TSH), and anti-TSH receptor antibodies (anti-TSH receptor or anti-thyrotropin receptor antibodies (TRAb), anti-thyroid peroxidase (A-TPO), and anti-thyroglobulin (A-Tg)). These data were reviewed for 30 patients before and during the three trimesters of pregnancy and during the three months after pregnancy. Results: During gestation, we observed a progressive decrease in the blood values of A-TPO and A-Tg, which reached their lowest values in the third trimester of pregnancy, but after birth, they returned to values statistically equivalent to those before pregnancy. Analyzing the three trimesters and the post-pregnancy period, A-TPO increased 192% between the first trimester and postpartum ( p = 0.009); it increased 627% between the second trimester and postpartum ( p < 0.001); and it increased >1000% between the third trimester and postpartum ( p < 0.001). There was no significant difference in the A-TPO values between the pre- and post-gestational periods ( p = 1.00), between the first and second trimesters ( p = 0.080), or between the second and third trimesters ( p = 0.247). Conclusions: According to the results presented here, we observed changes in the activities of A-Tg and A-TPO antibodies during and after pregnancy in women with previous AITD. In women who intend to become pregnant, are pregnant, or have given birth within three months, it is essential to monitor A-TPO, A-Tg, and thyroid function as well as serum thyroid hormones and TSH to identify thyroid dysfunction in a timely manner and adjust the treatment strategy to avoid the deleterious effects of hypothyroidism on both mother and baby during and after pregnancy.
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- 2024
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10. Recovery and partial purification of fibrinolytic protease from Pleurotus ostreatus and P. eryngii and cytotoxic and antioxidant activity of their extracts.
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Santana RDS, Mendes FS, Paula da Silva BJ, Lima ES, Nascimento TP, Carneiro da Cunha MN, Porto ALF, Teixeira MFS, Carvalho RP, and Gomes WR
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- Humans, Antioxidants chemistry, Peptide Hydrolases metabolism, Endopeptidases metabolism, Pleurotus chemistry, Agaricales chemistry, Antineoplastic Agents metabolism
- Abstract
Mushrooms are a source of primary and secondary metabolites. Little is known about the most suitable conditions for production of mushrooms by submerged fermentation. This article reports antioxidant and cytotoxic assays, in addition to quantitatively evaluating the content of proteases with fibrinolytic action in the crude extracts of two species of edible mushrooms produced in different formulations, as well as evaluating the recovery of these enzymes by aqueous two-phase systems (ATPS). The mushrooms Pleurotus ostreatus and Pleurotus eryngii , at concentration of 100 µg/mL, displayed inhibition of DPPH and ABTS radicals below 50%. In the cytotoxicity test, the cells human fibroblast cell lines (MRC-5) showed cell viability greater than 80%. Concerning fibrinolytic activity, P. eryngii presented 226.47 ± 7.26 U/mL, therefore being more efficient than P. ostreatus (71.5 ± 0.56 U/mL). In the recovery of the P. eryngii extract by ATPS, the fibrinolytic protease was partitioned in the salt phase (30.25 U/mL). The molecular mass of the proteases was between 75 and 100 kDa. These results prove the low cytotoxicity of the extracts produced and that fermentation in supplemented malt broth favored the excretion of fibrinolytic proteases compared to the other evaluated media.
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- 2024
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11. Relationship between trunk control and gross motor development of infants in the first year of life: A systematic review.
- Author
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Silva KMD, Pádua RF, Sá CDSC, and Carvalho RP
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- Humans, Infant, Posture physiology, Child Development physiology, Motor Skills physiology, Torso physiology
- Abstract
Objective: to verify the relationship between the level of trunk control and the acquisition of gross motor skills in the first year of life., Methods: a searching strategy was developed using the PICO tool and performed in the databases PubMed, Cochrane Library, Virtual Library in Health, Embase, and Scopus, from September 2020 to July 2022. The methodological quality of the articles was evaluated by the Ottawa Quality Assessment Scale Cohort Studies (NOS)., Results: six studies that evaluated the level of trunk control and gross motor development in infants aged 4 to 12 months were found. Four studies evaluated full-term infants, and only two studies evaluated preterm infants comparing them to full-term ones. Five studies showed high methodological quality and one study, low methodological quality. Most studies found significant correlation between the levels of segmental trunk control (static, active, and reactive), by the Segmental Assessment Trunk Control (SATCo), and gross motor development (prone, supine, sitting, standing, and walking) by the Alberta Infant Motor Scale (AIMS)., Conclusion: trunk control is directly related to gross motor development in different postures in infants between 7 and 12 months., Competing Interests: Declaration of competing interest The authors received no financial support for the research, authorship, and/or publication of this article., (Copyright © 2023. Published by Elsevier B.V.)
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- 2024
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12. GABAergic and glutamatergic transmission reveals novel cardiovascular and urinary bladder control features in the shell nucleus accumbens.
- Author
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de Carvalho RP, do Vale B, Dsouki NA, Cafarchio EM, De Luca LA, Aronsson P, and Sato MA
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- Rats, Animals, Male, Rats, Wistar, Glutamic Acid, gamma-Aminobutyric Acid, Nucleus Accumbens physiology, Urinary Bladder
- Abstract
The shell Nucleus Accumbens (NAcc) projects to the lateral preoptic area, which is involved in the central micturition control and receives inputs from medullary areas involved in cardiovascular control. We investigated the role of GABAergic and glutamatergic transmission in the shell NAcc on intravesical pressure (IP) and cardiovascular control. Male Wistar rats with guide cannulas implanted bilaterally in the shell NAcc 7 days prior to the experiments were anesthetized with 2% isoflurane in 100% O
2 and subjected to cannulation of the femoral artery and vein for mean arterial pressure (MAP) and heart rate recordings (HR) and infusion of drugs, respectively. The urinary bladder (UB) was cannulated for IP measurement. A Doppler flow probe was placed around the renal arterial for renal blood flow (RBF) measurement. After the baseline MAP, HR, IP and RBF recordings for 15 min, GABA or bicuculline methiodate (BMI) or L-glutamate or kynurenic acid (KYN) or saline (vehicle) were bilaterally injected into the shell NAcc and the variables were measured for 30 min. Data are as mean ± SEM and submitted to Student́s t test. GABA injections into the shell NAcc evoked a significant fall in MAP and HR and increased IP and RC compared to saline. L-glutamate in the shell NAcc increased MAP, HR and IP and reduced RC. Injections of BMI and KYN elicited no changes in the variables recorded. Therefore, the GABAergic and glutamatergic transmissions in neurons in the shell NAcc are involved in the neural pathways responsible for the central cardiovascular control and UB regulation., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier B.V. All rights reserved.)- Published
- 2023
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13. Selpercatinib and capmatinib combination promotes sustained complete response in novel ISOC1-RET fusion lung cancer after resistance to RET inhibitor via MET amplification: Case Report.
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Leite CA, Carvalho RP, da Costa FM, Medeiros AK, Schutz FA, and William WN Jr
- Abstract
RET fusions occur in 1-2% of non-small cell lung cancer. Selpercatinib and pralsetinib are selective RET inhibitors with significant improvement of outcome in patients with tumor harboring RET fusion; however, resistance mechanisms appear frequently, mainly driven by MAPK pathway bypass, secondary RET mutations, or in 5% via MET amplification. Co-inhibition of RET and MET is a compelling strategy for overcoming MET -dependent resistance to RET inhibitors and potentially other inhibitors. To our knowledge, this is the first report of a novel ISOC1-RET fusion lung cancer with a durable complete response to selpercatinib, with resistance via MET amplification, which was overcome by the successful combination of selpercatinib and capmatinib., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Leite, Carvalho, da Costa, Medeiros, Schutz and William.)
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- 2023
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14. Angiotensinergic and GABAergic transmission in the medial preoptic area: role in urinary bladder and cardiovascular control in female rats.
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Daiuto SA, de Carvalho RP, do Vale B, Dsouki NA, Giannocco G, Cafarchio EM, Aronsson P, and Sato MA
- Abstract
Introduction: The medial preoptic area (mPOA) participates in thermoregulatory control and blood pressure modulation as shown by studies with electrical stimulation of this area or cobalt chloride injection, a non-selective synapse inhibitor. This study aimed to investigate whether angiotensin II (Ang II) and GABA could act or not in the mPOA to mediate the cardiovascular and micturition control pathways. Methods: Female Wistar rats were submitted to stereotaxic surgery for implantation of a guide cannula into the mPOA 7 days prior to the experiments. Afterwards, the animals were isoflurane- anesthetized and submitted to the catheterization of the femoral artery and vein and urinary bladder cannulation for mean arterial pressure (MAP), heart rate (HR), and intravesical pressure (IP) recordings, respectively. After the baseline MAP, HR, and IP recordings for 15 min, Ang II (0.1 nM, 1 μL), losartan (AT-1 receptor antagonist, 100 nM, 1 μL), GABA (50 mM, 1 μL) or saline (1 μL) were injected into the mPOA, and the variables were measured for additional 30 min. In a different group of rats, the AT-1 receptor, angiotensin II converting enzyme (ACE), and GABAa receptor gene expression was evaluated in mPOA samples by qPCR. The data are as mean ± SEM and submitted to One-way ANOVA (Tukey posttest) or paired Student t-test (P <0.05). Results: The injection of Ang II into the mPOA evoked a significant hypotension (-37±10 mmHg, n = 6, p = 0.024) and bradycardia (-47 ± 20 bpm, p = 0.030) compared to saline (+1 ± 1 mmHg and +6 ± 2 bpm, n = 6). A significant increase in IP was observed after Ang II injection into the mPOA (+72.25 ± 17.91%, p = 0.015 vs. -1.80 ± 2.98%, n = 6, saline). No significant changes were observed in MAP, HR and IP after the losartan injection in the mPOA compared to saline injection. Injection of GABA into the mPOA evoked a significant fall in MAP and HR (-68 ± 2 mmHg, n = 6, p < 0.0001 and -115 ± 14 bpm, n = 6, p = 0.0002 vs. -1 ± 1 mmHg and +4 ± 2 bpm, n = 6, saline), but no significant changes were observed in IP. The AT-1 receptor, ACE and GABAa receptor mRNA expression was observed in all mPOA samples. Discussion: Therefore, in female rats, Ang II mediated transmission in the mPOA is involved in the cardiovascular regulation and in the control of central micturition pathways. A phasic control dependent on AT-1 receptors in the mPOA seems to be involved in the regulation of those cardiovascular and intravesical 3 parameters. In contrast, GABAergic transmission in the mPOA participates in the pathways of cardiovascular control in anesthetized female rats, nevertheless, this neurotransmission is not involved in the micturition control., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Daiuto, de Carvalho, Vale, Dsouki, Giannocco, Cafarchio, Aronsson and Sato.)
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- 2023
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15. Plasticity of face-hand sensorimotor circuits after a traumatic brachial plexus injury.
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Torres FF, Ramalho BL, Rodrigues MR, Schmaedeke AC, Moraes VH, Reilly KT, Carvalho RP, and Vargas CD
- Abstract
Background: Interactions between the somatosensory and motor cortices are of fundamental importance for motor control. Although physically distant, face and hand representations are side by side in the sensorimotor cortex and interact functionally. Traumatic brachial plexus injury (TBPI) interferes with upper limb sensorimotor function, causes bilateral cortical reorganization, and is associated with chronic pain. Thus, TBPI may affect sensorimotor interactions between face and hand representations., Objective: The aim of this study was to investigate changes in hand-hand and face-hand sensorimotor integration in TBPI patients using an afferent inhibition (AI) paradigm., Method: The experimental design consisted of electrical stimulation (ES) applied to the hand or face followed by transcranial magnetic stimulation (TMS) to the primary motor cortex to activate a hand muscle representation. In the AI paradigm, the motor evoked potential (MEP) in a target muscle is significantly reduced when preceded by an ES at short-latency (SAI) or long-latency (LAI) interstimulus intervals. We tested 18 healthy adults (control group, CG), evaluated on the dominant upper limb, and nine TBPI patients, evaluated on the injured or the uninjured limb. A detailed clinical evaluation complemented the physiological investigation., Results: Although hand-hand SAI was present in both the CG and the TBPI groups, hand-hand LAI was present in the CG only. Moreover, less AI was observed in TBPI patients than the CG both for face-hand SAI and LAI., Conclusion: Our results indicate that sensorimotor integration involving both hand and face sensorimotor representations is affected by TBPI., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Torres, Ramalho, Rodrigues, Schmaedeke, Moraes, Reilly, Carvalho and Vargas.)
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- 2023
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16. Translation and cross-cultural adaptation of the pediatric cerebral performance category (PCPC) and pediatric overall performance category (POPC) to Brazilian Portuguese.
- Author
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Chiarastelli TC, de Sá CDSC, Garcia CSNB, Cabó SL, and Carvalho RP
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- Humans, Child, Brazil, Surveys and Questionnaires, Intensive Care Units, Pediatric, Translations, Reproducibility of Results, Cross-Cultural Comparison, Language
- Abstract
Objective: To translate and culturally adapt the scales Pediatric Cerebral Performance Category (PCPC) and Pediatric Overall Performance Category (POPC) to the Brazilian population., Methods: Two English language proficient professionals independently translated the original version of the scales into Brazilian Portuguese. After consensus, it was generated a translated version of each scale. These were back translated into English by two native English translators. A new consensus process resulted in an English version of each scale, which were compared with the originals and approved by the author. A committee of experts with clinical and academic experience in intensive care checked the validity of the content and produced the pre-final versions of the scales, which were tested by 25 professionals from a Pediatric Intensive Care Unit. An audit was conducted to verify the consistency of the methodological process., Results: The pre-final versions were approved by 96% of the Brazilian professionals. No significant changes were made to the content of the instrument; however, it was identified the need of a guide with instructions on how to use the scales., Conclusions: The process of translation and cross-cultural adaptation of the scales was completed and resulted in PCPC-BR and POPC-BR scales.
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- 2023
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17. Extraction and characterization of collagen from the skin of Amazonian freshwater fish pirarucu.
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Carpio KCR, Bezerra RS, Cahú TB, Monte FTDD, Neri RCA, Silva JFD, Santos PRD, Carvalho RP, Galeno DML, and Inhamuns AJ
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- Animals, Collagen Type I, Skin chemistry, Fishes, Fresh Water, Fish Proteins analysis, Fish Proteins chemistry, Collagen
- Abstract
The need to fully exploit fishing resources due to increasing production and consequent waste generation requires research to promote the sustainability of the fishing industry. Fish waste from the industry is responsible for relevant environmental contamination. However, these raw materials contain high amounts of collagen and other biomolecules, being attractive due to their industrial and biotechnological applicability. Thus, to reduce the waste from pirarucu (Arapaima gigas) processing, this study aimed to obtain collagen from pirarucu skin tissue. The extraction process used 0.05 M sodium hydroxide, 10% butyl alcohol, and 0.5 M acetic acid, with extraction temperature of 20°C. The obtained yield was 27.8%, and through sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), it was determined that the collagen obtained was type I. This study showed that collagen solubility was highest at pH 3 and the lowest solubility was at concentrations of 3% sodium chloride. The denaturation temperature of collagen was 38.1°C, and its intact molecular structure was observed using the Fourier transform infrared spectrophotometry technique with an absorption radius of 1. The results showed that it was possible to obtain collagen from pirarucu skin at 20°C, which has the typical characteristics of commercial type I collagen. In conclusion, the procedures used may be considered to be an interesting alternative for collagen extraction, a new product obtained from the processing of fish waste.
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- 2023
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18. Understanding the lithiation limits of high-capacity organic battery anodes by atomic charge derivative analysis.
- Author
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Carvalho RP, Marchiori CFN, Brandell D, and Araujo CM
- Abstract
The superlithiation of organic anodes is a promising approach for developing the next generation of sustainable Li-ion batteries with high capacity. However, the lack of fundamental understanding hinders its faster development. Here, a systematic study of the lithiation processes in a set of dicarboxylate-based materials is carried out within the density functional theory formalism. It is demonstrated that a combined analysis of the Li insertion reaction thermodynamics and the conjugated-moiety charge derivative enables establishing the experimentally observed maximum storage, thus allowing an assessment of the structure-function relationships also.
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- 2022
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19. Upper limb joint coordination preserves hand kinematics after a traumatic brachial plexus injury.
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Lustosa L, Silva AEL, Carvalho RP, and Vargas CD
- Abstract
Background: Traumatic brachial plexus injury (TBPI) causes a sensorimotor deficit in upper limb (UL) movements., Objective: Our aim was to investigate the arm-forearm coordination of both the injured and uninjured UL of TBPI subjects., Methods: TBPI participants ( n = 13) and controls ( n = 10) matched in age, gender, and anthropometric characteristics were recruited. Kinematics from the shoulder, elbow, wrist, and index finger markers were collected, while upstanding participants transported a cup to their mouth and returned the UL to a starting position. The UL coordination was measured through the relative phase (RP) between arm and forearm phase angles and analyzed as a function of the hand kinematics., Results: For all participants, the hand transport had a shorter time to peak velocity ( p < 0.01) compared to the return. Also, for the control and the uninjured TBPI UL, the RP showed a coordination pattern that favored forearm movements in the peak velocity of the transport phase ( p < 0.001). TBPI participants' injured UL showed a longer movement duration in comparison to controls ( p < 0.05), but no differences in peak velocity, time to peak velocity, and trajectory length, indicating preserved hand kinematics. The RP of the injured UL revealed altered coordination in favor of arm movements compared to controls and the uninjured UL ( p < 0.001). Finally, TBPI participants' uninjured UL showed altered control of arm and forearm phase angles during the deceleration of hand movements compared to controls ( p < 0.05)., Conclusion: These results suggest that UL coordination is reorganized after a TBPI so as to preserve hand kinematics., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Lustosa, Silva, Carvalho and Vargas.)
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- 2022
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20. Blockade of vasopressin receptors reduces the threshold pressure of micturition reflex in female rats.
- Author
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Neri LSS, de Carvalho RP, Daiuto SA, Vale BD, Cafarchio EM, Aronsson P, and Sato MA
- Abstract
The mechanisms involved in urinary bladder control are not fully understood, but it is well accepted that a complex central network is involved in micturition control. The micturition reflex can be modulated by direct cortical influence through facilitatory and inhibitory mechanisms. In addition, humoral mechanisms are involved in the bladder control. Vasopressin increases bladder contraction and intravesical pressure. This study sought to investigate the effect of intravenous injections of vasopressin receptor antagonists on cystometric parameters in anesthetized female rats. Isoflurane anesthetized adult female Wistar rats underwent femoral artery and vein cannulation for arterial pressure (AP) and heart rate (HR) recordings, and infusion of drugs, respectively. The bladder was also cannulated for intravesical pressure (IP) recordings and infusion of saline (10 mL/h) for cystometric evaluation. After baseline AP, HR and IP recordings, saline (vehicle, 1 mL/kg), V1a (5 μg/kg) or V2 receptor antagonist (5 μg/kg) was injected i.v. and after 25 min the cystometry was carried out. Neither saline nor V1a or V2 receptor blockade evoked any change in AP, HR and IP. Nevertheless, during cystometry, the threshold pressure of the micturition reflex was significantly reduced in rats with V1a (to 19.30 ± 2.39 mmHg) and V2 receptor blockade (to 19.88 ± 2.49 mmHg) compared to the saline group (28.85 ± 2.06 mmHg, p = 0.014). No difference was observed in the other cystometric parameters. Therefore, the data suggest that blockade of V1a and V2 receptors reduces the threshold pressure of the micturition reflex and does not influence other cystometric parameters in anesthetized female Wistar rats., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. All authors approved the final version of the manuscript and agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved. All persons designated as authors qualify for authorship, and all those who qualify for authorship are listed., (© 2022 The Authors.)
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- 2022
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21. Vitamin D supplementation at different doses affects the vagal component of the baroreceptor reflex and the Bezold-Jarisch reflex in eutrophic rats.
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Fioretti AC, Dsouki NA, do Vale B, de Carvalho RP, Dias DPM, Venancio DP, Fonseca FLA, and Sato MA
- Abstract
Vitamin D has been used to prevent several diseases. The 1,25 (OH) 2D3, the active form of vitamin D (VitD), participates in calcium metabolism, and has direct action in various tissues as those of the cardiovascular system binding to the VitD receptor. We investigated whether the supplementation with different doses of VitD affect or not the resting mean arterial pressure (MAP) and heart rate (HR), heart rate variability (HRV), baroreceptor and Bezold-Jarisch reflexes in eutrophic rats. Adult male Wistar rats were randomly assigned in 4 groups (Control, VitD 15, 250, and 3,750 IU/day, n = 6/group). After 3 days of supplementation, MAP and HR recordings were performed in freely moving rats. Baseline (resting) MAP, HR, and HRV showed no difference in Control and VitD groups. Nevertheless, the index of the baroreceptor reflex showed that the bradycardic component of the baroreflex evoked by a pressor dose of phenylephrine (3 μg/kg of b.w.) in bolus injection had a significant increase in rats supplemented with VitD 15 IU/day for 3 days compared to Control animals. No difference was observed in the index of the baroreflex evaluated with phenylephrine in rats treated with VitD 250 and 3,750 IU/day for 3 days in comparison to the Control group. The index of the baroreceptor reflex evaluated with an intravenous bolus injection of a depressor dose of sodium nitroprusside (30 μg/kg of b.w.) showed that the tachycardic component of the baroreflex is not different comparing all groups supplemented with VitD and Control animals. Rats supplemented with VitD 15 IU/day presented exaggerated bradycardic responses to the intravenous injection of phenylbiguanide (PBG, 5 μg/kg of b.w.) compared to Control animals, despite the similar hypotension in both groups. Higher doses of supplementation of VitD (250 and 3,750 IU/day for 3 days) abolished the hypotension and bradycardia induced by PBG. The findings suggest that the supplementation with different doses of VitD (15, 250, and 3,750 IU/day) for 3 days did not affect the resting arterial pressure, heart rate and autonomic modulation on the heart in rats. Despite that, the supplementation with a low dose of VitD (15 IU/day for 3 days) improved the sensitivity of the bradycardic component of the baroreflex, whereas higher doses of supplementation with VitD (250 and 3,750 IU/day for 3 days) were unable to cause such effect. In addition, the Bezold-Jarisch reflex responses can be affected regardless the dose of VitD (15, 250 or 3,750 IU/day) supplementation for 3 days in rats., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Fioretti, Dsouki, do Vale, de Carvalho, Dias, Venancio, Fonseca and Sato.)
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- 2022
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22. Genetic diversity of Peltophorum dubium (Spreng.) Taub. progenies from the states of Minas Gerais and Mato Grosso do Sul, Brazil.
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Bassan DAZ, Santos SC, Davide LMC, Trovato VW, Medeiros ES, Santos CC, and Carvalho RP
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- Brazil, Cluster Analysis, Genetic Variation genetics, Humans, Seeds, Fabaceae
- Abstract
There is little information regarding the genetic diversity of native species aimed at identifying the best viable progenies for in situ and ex situ conservation. Furthermore, there is a lack of future forest improvement programs. We aimed to know the genetic diversity of 64 Peltophorum dubium (Spreng.) Taub. (Fabaceae) progenies. We determined this species' dendrometric characteristics, and when using multivariate techniques and cluster analysis, we verified the differences between the progenies and groups with less heterogeneity. The progeny and provenance test was installed in Dourados (Mato Grosso do Sul - MS), with seeds collected in three MS regions (Vale do Ivinhema, Serra de Maracaju, and Serra da Bodoquena) and in the micro-region of Lavras (Minas Gerais - MG). The experiment was conducted in an alpha lattice 8 x 8 with four repetitions. We found genetic variability among and within P. dubium populations for all height, diameter, circumference at breast height, volume, and basal area characters. We suggest that P. dubium populations have high genetic variability, which indicates possible genetic improvement through best progeny selection. The UPGMA and Tocher methods grouped the progenies into three and nine groups, respectively, in which the most divergent individuals come from MG and the Bonito region in MS. Based on morphological characters, P. dubium progenies identified as 45, 47, 49, 50, 55, and 59 from MG are the most promising, while progenies 6 and 9 were the least promising.
- Published
- 2022
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23. Exploring Metastable Phases During Lithiation of Organic Battery Electrode Materials.
- Author
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Carvalho RP, Alhanash M, Marchiori CFN, Brandell D, and Araujo CM
- Abstract
In this work, the Li-ion insertion mechanism in organic electrode materials is investigated through the lens of atomic-scale models based on first-principles theory. Starting with a structural analysis, the interplay of density functional theory with evolutionary and potential-mapping algorithms is used to resolve the crystal structure of the different (de)lithiated phases. These methods elucidate different lithiation reaction pathways and help to explore the formation of metastable phases and predict one- or multi-electron reactions, which are still poorly understood for organic intercalation electrodes. The cathode material dilithium 2,5-oxyterephthalate (operating at 2.6 V vs. Li/Li+) is investigated in depth as a case study, owing to its rich redox chemistry. When compared with recent experimental results, it is demonstrated that metastable phases with peculiar ring-ring molecular interactions are more likely to be controlling the redox reactions thermodynamics and consequently the battery voltage., (© 2022 The Authors. ChemSusChem published by Wiley-VCH GmbH.)
- Published
- 2022
- Full Text
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24. Tuning the Electrochemical Properties of Organic Battery Cathode Materials: Insights from Evolutionary Algorithm DFT Calculations.
- Author
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Carvalho RP, Marchiori CFN, Brandell D, and Araujo CM
- Abstract
Several forms of organic materials have arisen as promising candidates for future active electrode materials for Li-ion and post-Li-ion batteries, owing to a series of key features that encompasses sustainability, accessibility, and tunable electrochemical properties by molecular modifications. In this context, a series of organic electrode materials (OEMs) are investigated to further understand their thermodynamic and electronic properties. Through an evolutionary algorithm approach combined with first-principles calculations, the crystal structure of lithiated and delithiated phases of these OEMs and their respective NO
2 -substituted analogues are predicted. This framework allows a first assessment of their electrochemical and electronic properties and further understanding on the effects of the nitro group in the substituted compounds. NO2 is found to strongly affect structural and thermodynamic aspects during the electrochemical reaction with the reducing equivalents (Li+ +e- ), changing the OEM's character from a low-potential anode to a high-potential cathode by creating a localization of the additional electrons, thus resulting in a better-defined redox-active center and leading to a shift in the potential from 0.92 V to 2.66 V vs. Li/Li+ ., (© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)- Published
- 2020
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25. Motor performance of children with cerebral palsy in anterior reach.
- Author
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Soares LMDS, Rozane JMSG, and Carvalho RP
- Subjects
- Adolescent, Anthropometry, Biomechanical Phenomena, Child, Cross-Sectional Studies, Female, Humans, Imaging, Three-Dimensional, Male, Movement, Spasm, Torso, Cerebral Palsy physiopathology, Motor Skills, Postural Balance, Range of Motion, Articular
- Abstract
Background: Children with cerebral palsy perform small displacements during the anterior reach movement from standing position without loss of balance. There are two possible reasons for their decreased performance: the difficulty to stabilize their lower limbs during forward body inclination to reach greater distances or to control the movement of forward reaching. The objective of this study is to identify and compare the motor performance of children with CP and typically developing children, during anterior reach., Methods: This is a cross-sectional study, composed of 28 children, 14 with spastic cerebral palsy and 14 typical children, who were all evaluated by the Pediatric Reach Test and three-dimensional motion analysis., Findings: The decreased performance was shown by the lower movement control by children with cerebral palsy. The bilateral and unilateral cerebral palsy children showed lower range of motion of shoulder and trunk than typical children., Interpretation: Children with cerebral palsy show lower anterior displacement and movement control and difficulty bending the trunk and flexing shoulders while reaching forward, suggesting poor postural balance., (Copyright © 2019 Elsevier Ltd. All rights reserved.)
- Published
- 2019
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26. RE-INTERVENTION IN DE NOVO VITREOUS OPACITIES AFTER PARS PLANA VITRECTOMY IN FAMILIAL AMYLOIDOTIC POLYNEUROPATHY TTR VAL30METPORTUGUESE PATIENTS.
- Author
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Ferreira NN, Cunha Dias DA, Afonso Carvalho RP, and Pardal Monteiro Coelho MT
- Subjects
- Aged, Female, Humans, Male, Middle Aged, Prealbumin genetics, Reoperation, Retrospective Studies, Amyloid Neuropathies, Familial complications, Eye Diseases surgery, Plaque, Amyloid surgery, Vitrectomy methods, Vitreous Body pathology
- Abstract
Purpose: To report management of de novo vitreous amyloid opacities after previous pars plana vitrectomy in familial amyloidotic polyneuropathy transthyretin Val30Met., Methods: This work is a retrospective observational consecutive case series of five eyes of four patients. Demographic data, transthyretin mutation involved, age at the beginning of disease, duration of disease, treatment (liver transplant or tafamidis), time between vitrectomy and re-intervention, and ophthalmologic changes were evaluated. Surgical re-intervention included phacoemulsification with intraocular lens implantation in phakic eyes, re-vitrectomy as complete as possible with posterior capsulectomy, and internal limiting membrane peeling if wrinkling of internal retinal surface was present., Results: All patients had transthyretin Val30Met mutation, and three were women. Mean age of onset of the disease was 52 ± 11.0 years, and average evolution time of the disease was 8 years. Three patients had been submitted to liver transplant 4, 9, and 15 years before. Time between first vitrectomy and surgical re-intervention was longer than 2 years in all cases. Two eyes had amyloid deposits on anterior lens surface and pupillary border with scalloped pupil. Two eyes were phakic. Glaucoma was present in two eyes; one of them had previous trabeculectomy. All cases had vitreous opacities behind posterior lens capsule and at vitreous base area. After re-intervention, no further recurrence was observed (average follow-up of 10 months)., Conclusion: De novo vitreous amyloid opacities may occur several years after pars plana vitrectomy. Amyloid deposition in vitreous cavity was observed only in strong vitreous adherence locations (behind posterior lens capsule and at vitreous base area). The authors expect that this procedure, an extensive re-vitrectomy associated with posterior capsulectomy, will prevent de novo vitreous amyloid opacities.
- Published
- 2019
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27. Infants' Age and Walking Experience Shapes Perception-Action Coupling When Crossing Obstacles.
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Vieira APB, Carvalho RP, Barela AMF, and Barela JA
- Subjects
- Age Factors, Biomechanical Phenomena, Female, Humans, Infant, Male, Child Development physiology, Psychomotor Performance physiology, Space Perception physiology, Visual Perception physiology, Walking physiology
- Abstract
This study examined the effects of age and walking experience on infants' ability to step over an obstacle. We videotaped 30 infants with one (mean [ M] age = 12.6 months), three ( M age = 14.7 months), and six months ( M age = 17.7 months) of walking experience walking on a pathway with and without an obstacle. We found a shorter stride and slower velocity for infants with one month of walking experience and for the walking condition with an obstacle than for other experience groups or for walking without an obstacle. Across all groups, the horizontal distance between an infant's foot and the obstacle was larger for the trailing leg than for the leading leg. The vertical distance for both legs was similar among 1-month walkers, increased for 3-month walkers, and was similar for the trailing leg of the 6-month walker group. The percentage of the interlimb coordination relative phase for the leading limb was smaller for 3- and 6-month walker groups. In conclusion, age and walking experience contribute to improving coupling between sensory information and motor action and to organization for stepping over an obstacle in infants.
- Published
- 2019
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28. Kinematic characteristics of arm and trunk when drinking from a glass in children with and without cerebral palsy.
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Machado LR, Heathcock J, Carvalho RP, Pereira ND, and Tudella E
- Subjects
- Adolescent, Biomechanical Phenomena, Child, Child, Preschool, Female, Humans, Male, Muscle Spasticity physiopathology, Range of Motion, Articular, Arm physiopathology, Cerebral Palsy physiopathology, Drinking, Movement, Torso physiopathology
- Abstract
Background: Children with cerebral palsy (CP) often have difficulty with activities that require the upper extremities secondary to deficits in strength and range of motion, spasticity, and poor timing and coordination of movement. This study aimed to identify and compare timing and coordination of the trunk and upper extremity in children with and without CP during a functional task., Methods: Eighteen children, N = 9 with CP and N = 9 with typical development were enrolled. Participants were seated in a standard chair and instructed to drink from a glass placed at a distance of 75% of available arm length. The task was divided into 3 Phases: 1) reaching to the glass, 2) transporting the glass to the mouth, and 3) returning the glass to the table. The spatiotemporal and angular variables were analyzed with 3D kinematics of movement using a 4-camera Qualysis Motion System., Findings: Children with CP demonstrated poor upper extremity timing and coordination. Despite significant trunk displacement used as a compensation in Phase 1, children with CP demonstrated a significantly lower mean velocity and velocity peak during Phases 2 and 3; and demonstrated less straight motion which required more time and movement units in all phases., Interpretation: Children with CP demonstrated poor upper extremity timing and coordination when drinking (even when they successfully completed the task) measured by more trunk displacement, slower, less straight movements, and more movement units. Current rehabilitation strategies could consider training speed and use functional tasks that require different strategies across multiple phases., (Copyright © 2019 Elsevier Ltd. All rights reserved.)
- Published
- 2019
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29. Faunistic Analysis of the Families Calliphoridae and Mesembrinellidae (Diptera) at Jardim Botânico do Rio de Janeiro, Brazil.
- Author
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Figueiredo AL, Carvalho RP, Azevedo WTA, Teixeira MLF, Rebello MT, Ramos ACDC, Lessa CSS, and Aguiar VM
- Subjects
- Animals, Brazil, Biodiversity, Diptera
- Abstract
Flies of the family Calliphoridae play a variety of ecological roles. They carry various pathogens and cause myiasis in humans and livestock, but they are useful to forensic entomology and in larval therapy. Mesembrinellidae flies, formerly classified in the family Calliphoridae, are good bioindicators of human interference in natural environments. In this study, we carried out an inventory of the Calliphoridae and Mesembrinellidae at four collecting sites within the Jardim Botânico do Rio de Janeiro. Eight traps were set, four in the arboretum (sites A and B), where the public is allowed to visit, and four at an Atlantic Forest fragment (sites C and D), open only to researchers. From July 2014 to June 2015, a total of 35,890 calliphorid flies were captured in 10 species and 145 Mesembrinellidea in 3. The greatest number of flies was found at site A and diversity was higher at site C. Chrysomya megacephala (Wiedemann) (Diptera: Calliphoridae) was the most prevalent species, being present at all sites. Mesembrinella bellardiana (Aldrich) (Diptera: Mesembrinellidae), Laneella nigripes (Guimarães) (Diptera: Mesembrinellidae), and Huascaromusca purpurata (Aldrich) (Diptera: Mesembrinellidae) were present at sites C and D, which indicates a preservation of the area because they are asynanthropic species. There were significant differences between sites A and D and sites B and D.
- Published
- 2018
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30. Calliphoridae (Diptera) Associated With Rattus rattus Carcasses in the Tijuca National Park, Rio de Janeiro, Brazil.
- Author
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Azevedo WTA, Carvalho RP, Figueiredo AL, Ross SD, Lessa CSS, Fortes RDR, and Aguiar VM
- Subjects
- Animals, Brazil, Entomology, Larva growth & development, Parks, Recreational, Seasons, Cadaver, Diptera growth & development, Forensic Sciences, Rats parasitology
- Abstract
Forensic entomology is a complementary tool for penal procedures, mainly on estimating postmortem interval. Study of cadaveric fauna in various environments is primary as source of information to support this science. This study collected information about the fauna of Calliphoridae associated to carcasses of Rattus rattus in the Tijuca National Park, RJ. Four collections were conducted, one for each season of 2015, exposing six carcasses at georeferenced points in each collection. The carcasses were placed 550 m from the boarder and equidistant by 100 m. Five decomposition stages were identified, and 10,559 individuals of Calliphoridae belonging to 10 species were collected. The most abundant species were Hemilucilia semidiaphana (Rondani) (Diptera: Calliphoridae) and Lucilia eximia (Wiedemann) (Diptera: Calliphoridae). L. eximia was the most abundant species during the Swelling and Black Putrefaction stages, succeeded in the next stages by two species of the genera Hemilucilia. H. semidiaphana was the dominant species in the last two stages, followed by Hemilucilia segmentaria (Fabricius) (Diptera: Calliphoridae). The genus Mesembrinella (Diptera: Calliphoridae) occurred mainly during the Black putrefaction stage. Mesembrinella bellardiana (Aldrich) was more abundant, with higher occurrence during the Black putrefaction and Dry decay stages. Mesembrinella peregrina (Aldrich) occurred in the two last stages with low abundance. Huascaromusca aeneiventris (Wiedemann) (Diptera: Calliphoridae) occurred during all the observed stages, mainly during the Butyric fermentation stage. Huascaromusca purpurata (Aldrich) (Diptera: Calliphoridae) occurred only during the Dry decay stage and in low abundance. A succession pattern in the carcasses colonization was observed, providing relevant information for the resolution of criminal investigations in this environment.
- Published
- 2018
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31. Cross-Cultural Adaptation of the Physician Orders for Life-Sustaining Treatment Form to Brazil.
- Author
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Mayoral VFS, Fukushima FB, Rodrigues AM, Carvalho RP, Carvalho LP, Pinheiro LAFV, Polegato BF, Minicucci MF, Bassett R, Moss AH, Steinberg KE, and Vidal EIO
- Subjects
- Adult, Aged, Aged, 80 and over, Brazil, Female, Humans, Male, Middle Aged, Pilot Projects, United States, Advance Care Planning standards, Cross-Cultural Comparison, Life Support Care standards, Palliative Care standards, Practice Guidelines as Topic, Translations
- Abstract
Background: The Physician Orders for Life-Sustaining Treatment (POLST) paradigm is considered one of the most important strategies to respect patients' values at the end of life in the United States. The cross-cultural adaptation of POLST entailed several methodological considerations, which may be informative for international researchers who may also consider bringing POLST to their countries as a means to promote care at the end of life that is consistent with patients' preferences., Objective: To report the methods and outcome of the cross-cultural adaptation of the POLST form to Brazil., Design: Cross-cultural adaptation study., Setting/subjects: Twenty physicians and 10 patients at a university hospital participated in the pilot tests., Results: The cross-cultural adaptation process included choosing which existing POLST form(s) to use as a source, deciding the intended reading level, which healthcare professionals should be allowed to sign the form, and consultation with attorneys, bioethicists, and members of the National POLST Paradigm Task Force. Pilot tests occurred in two stages using different approaches. First, 20 physicians were trained about POLST and asked for any unclear aspects related to the form. Second, trained investigators completed POLST forms after engaging in advance care planning conversations with 10 hospitalized patients or patients' surrogates., Conclusions: This report provides a basis for future cross-cultural adaptations of POLST to other countries. The authors hope such new adaptations will broaden the possibilities of research using POLST and also may promote wider provision of care at the end of life that is consistent with patients' preferences.
- Published
- 2018
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32. Dipterofauna Associated With Rat Carcasses in the Atlantic Forest, Southeastern Brazil.
- Author
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Carvalho RP, Azevedo WTA, Figueiredo AL, Lessa CSS, and Aguiar VM
- Subjects
- Animals, Biodiversity, Cadaver, Rats, Seasons, Diptera, Forensic Sciences
- Abstract
Each biome has its own fauna and intrinsic local conditions that determine the succession patterns of insects on carcasses. For this reason, regional studies are very important to forensics. This study deals with the flies that visit carcasses of Rattus rattus (L., 1758) in the Atlantic Forest remnant of Floresta da Tijuca, Rio de Janeiro, Brazil. We compare the diversity and relative abundance of fly families and species throughout the four seasons of the year and test for correlations between certain environmental variables and fly richness. In each of the four seasons, we exposed the carcasses of three rats. The carcasses were put in traps that were installed on the ground, separated by 100 m. The flies were collected from the carcasses on a daily basis, and were taken to the laboratory and kept in a climate chamber (28 °C day and 26 °C night). A total of 5,537 flies were captured, identified into 12 families: Calliphoridae (4,884 specimens), followed by Sarcophagidae, Micropezidae, Fannidae, Muscidae, Phoridae, and Neridae. Canonical correspondence and redundancy analyses of the environmental variables indicated no relationship between the seasons and fly abundance. Carcass decomposition lasted longer in the winter (12 d) than in the summer (8 d). The Margalef richness index indicated higher richness in the spring and winter, and lower richness in the summer. The Shannon-Wiener index and Simpson dominance indicated greater diversity in the spring. Diptera colonized all stages of decomposition. The families Calliphoridae and Sarcophagidae were more prevalent during the Fermentation stage. Our data have important implications for forensic entomology., (© The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)
- Published
- 2017
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33. Identification of hispidin as a bioluminescent active compound and its recycling biosynthesis in the luminous fungal fruiting body.
- Author
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Oba Y, Suzuki Y, Martins GNR, Carvalho RP, Pereira TA, Waldenmaier HE, Kanie S, Naito M, Oliveira AG, Dörr FA, Pinto E, Yampolsky IV, and Stevani CV
- Subjects
- Agaricales chemistry, Agaricales metabolism, Agaricus chemistry, Agaricus metabolism, Basidiomycota chemistry, Basidiomycota metabolism, Fruiting Bodies, Fungal metabolism, Molecular Structure, Fruiting Bodies, Fungal chemistry, Luminescent Agents analysis, Luminescent Agents metabolism, Luminescent Measurements, Pyrones analysis, Pyrones metabolism
- Abstract
We previously showed that luminous fungi share a common mechanism in bioluminescence, and identified hispidin as a luciferin precursor in Neonothopanus nambi mycelium. Here we showed the presence of hispidin as a bioluminescent active compound at 25-1000 pmol g
-1 in the fruiting bodies of Mycena chlorophos, Omphalotus japonicus, and Neonothopanus gardneri. These results suggest that luminous mushrooms contain hispidin as a luciferin precursor. We also found that non-luminous "young" fruiting bodies exhibited luminescence by hispidin treatment. Furthermore, we observed a gradual luminescence enhancement of the cell-free fruiting body extract by the addition of hispidin biosynthetic components, namely caffeic acid, ATP and malonyl-CoA. These findings suggest that continuous weak glow of luminous mushrooms is regulated by slow recycling biosynthesis of hispidin.- Published
- 2017
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34. Mechanism and color modulation of fungal bioluminescence.
- Author
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Kaskova ZM, Dörr FA, Petushkov VN, Purtov KV, Tsarkova AS, Rodionova NS, Mineev KS, Guglya EB, Kotlobay A, Baleeva NS, Baranov MS, Arseniev AS, Gitelson JI, Lukyanov S, Suzuki Y, Kanie S, Pinto E, Di Mascio P, Waldenmaier HE, Pereira TA, Carvalho RP, Oliveira AG, Oba Y, Bastos EL, Stevani CV, and Yampolsky IV
- Subjects
- Fungal Proteins metabolism, Fungi metabolism, Indoles metabolism, Luciferases metabolism, Pyrazines metabolism, Pyrones chemistry, Fungal Proteins chemistry, Fungi chemistry, Indoles chemistry, Luciferases chemistry, Luminescence, Pyrazines chemistry
- Abstract
Bioluminescent fungi are spread throughout the globe, but details on their mechanism of light emission are still scarce. Usually, the process involves three key components: an oxidizable luciferin substrate, a luciferase enzyme, and a light emitter, typically oxidized luciferin, and called oxyluciferin. We report the structure of fungal oxyluciferin, investigate the mechanism of fungal bioluminescence, and describe the use of simple synthetic α-pyrones as luciferins to produce multicolor enzymatic chemiluminescence. A high-energy endoperoxide is proposed as an intermediate of the oxidation of the native luciferin to the oxyluciferin, which is a pyruvic acid adduct of caffeic acid. Luciferase promiscuity allows the use of simple α-pyrones as chemiluminescent substrates.
- Published
- 2017
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35. Measuring postural control during mini-squat posture in men with early knee osteoarthritis.
- Author
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Petrella M, Gramani-Say K, Serrão PR, Lessi GC, Barela JA, Carvalho RP, and Mattiello SM
- Subjects
- Cross-Sectional Studies, Humans, Isometric Contraction, Knee physiopathology, Knee Joint physiopathology, Male, Middle Aged, Movement, Muscle Strength, Muscle, Skeletal physiopathology, Osteoarthritis, Knee rehabilitation, Pain etiology, Quadriceps Muscle physiopathology, Self Report, Torque, Osteoarthritis, Knee physiopathology, Postural Balance, Posture
- Abstract
Studies have suggested a compromised postural control in individuals with knee osteoarthritis (OA) evidenced by larger and faster displacement of center of pressure (COP). However, quantification of postural control in the mini-squat posture performed by patients with early knee OA and its relation to muscle strength and self-reported symptoms have not been investigated. The main aim of this cross-sectional, observational, controlled study was to determine whether postural control in the mini-squat posture differs between individuals with early knee OA and a control group (CG) and verify the relation among knee extensor torque (KET) and self-reported physical function, stiffness and pain. Twenty four individuals with knee OA grades I and II (OAG) (mean age: 52.35±5.00) and twenty subjects without knee injuries (CG) (mean age: 51.40±8.07) participated in this study. Participants were assessed in postural control through a force plate (Bertec Mod. USA), which provided information about the anterior-posterior (AP) and medial-lateral (ML) COP displacement during the mini-squat, in isometric, concentric and eccentric knee extensor torque (KET) (90°/s) through an isokinetic dynamometer (BiodexMulti-Joint System3, Biodex Medical Incorporation, New York, NY, USA), and in self-reported symptoms through the WOMAC questionnaire. The main outcomes measured were the AP and ML COP amplitude and velocity of displacement; isometric, concentric, and eccentric KET and self-reported physical function, stiffness and pain. No significant differences were found between groups for postural control (p>0.05). Significant lower eccentric KET (p=0.01) and higher scores for the WOMAC subscales of pain (p=<0.001), stiffness (p=0.001) and physical function (p<0.001) were found for the OAG. Moderate and negative correlations were found between the AP COP amplitude of displacement and physical function (ρ=-0.40, p=0.02). Moderate and negative correlations were observed between the AP COP velocity of displacement and physical function (ρ=0.47, p=0.01) and stiffness (ρ=-0.45, p=0.02). The findings of the present study emphasize the importance of rehabilitation from the early degrees of knee OA to prevent postural instability and the need to include quadriceps muscle strengthening, especially by eccentric contractions. The relationship between the self-reported symptoms and a lower and slower COP displacement suggest that the postural control strategy during tasks with a semi-flexed knee should be further investigated., (Copyright © 2017 Elsevier B.V. All rights reserved.)
- Published
- 2017
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36. Isolated and Community Contexts Produce Distinct Responses by Host Plants to the Presence of Ant-Aphid Interaction: Plant Productivity and Seed Viability.
- Author
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Canedo-Júnior EO, Santiago GS, Zurlo LF, Ribas CR, Carvalho RP, Alves GP, Carvalho MC, and Souza B
- Subjects
- Animals, Quantitative Trait, Heritable, Ants physiology, Aphids physiology, Host-Parasite Interactions physiology, Phaseolus growth & development, Phaseolus parasitology, Seeds physiology
- Abstract
Ant-aphid interactions may affect host plants in several ways, however, most studies measure only the amount of fruit and seed produced, and do not test seed viability. Therefore, the aim of this study was to assess the effects of the presence of ant-aphid interactions upon host plant productivity and seed viability in two different contexts: isolated and within an arthropod community. For this purpose we tested the hypothesis that in both isolated and community contexts, the presence of an ant-aphid interaction will have a positive effect on fruit and seed production, seed biomass and rate of seed germination, and a negative effect on abnormal seedling rates, in comparison to plants without ants. We performed a field mesocosm experiment containing five treatments: Ant-aphid, Aphid, Community, Ant-free community and Control. We counted fruits and seeds produced by each treatment, and conducted experiments for seed biomass and germinability. We found that in the community context the presence of an ant-aphid interaction negatively affected fruit and seed production. We think this may be because aphid attendance by tending-ants promotes aphid damage to the host plant, but without an affect on seed weight and viability. On the other hand, when isolated, the presence of an ant-aphid interaction positively affected fruit and seed production. These positive effects are related to the cleaning services offered to aphids by tending-ants, which prevent the development of saprophytic fungi on the surface of leaves, which would cause a decrease in photosynthetic rates. Our study is important because we evaluated some parameters of plant fitness that have not been addressed very well by other studies involving the effects of ant-aphid interactions mainly on plants with short life cycles. Lastly, our context dependent approach sheds new light on how ecological interactions can vary among different methods of crop management., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2017
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37. Association between asthma and female sex hormones.
- Author
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Baldaçara RP and Silva I
- Subjects
- Asthma physiopathology, Brazil, Contraceptives, Oral adverse effects, Female, Hormone Replacement Therapy adverse effects, Humans, Menopause, Pregnancy, Pregnancy Complications, Progesterone adverse effects, Risk Factors, Asthma etiology, Gonadal Steroid Hormones adverse effects
- Abstract
Context and Objective:: The relationship between sex hormones and asthma has been evaluated in several studies. The aim of this review article was to investigate the association between asthma and female sex hormones, under different conditions (premenstrual asthma, use of oral contraceptives, menopause, hormone replacement therapy and pregnancy)., Design and Setting:: Narrative review of the medical literature, Universidade Federal do Tocantins (UFT) and Universidade Federal de São Paulo (Unifesp)., Methods:: We searched the CAPES journal portal, a Brazilian platform that provides access to articles in the MEDLINE, PubMed, SciELO, and LILACS databases. The following keywords were used based on Medical Subject Headings: asthma, sex hormones, women and use of oral contraceptives., Results:: The associations between sex hormones and asthma remain obscure. In adults, asthma is more common in women than in men. In addition, mortality due to asthma is significantly higher among females. The immune system is influenced by sex hormones: either because progesterone stimulates progesterone-induced blocking factor and Th2 cytokines or because contraceptives derived from progesterone and estrogen stimulate the transcription factor GATA-3., Conclusions:: The associations between asthma and female sex hormones remain obscure. We speculate that estrogen fluctuations are responsible for asthma exacerbations that occur in women. Because of the anti-inflammatory action of estrogen, it decreases TNF-α production, interferon-γ expression and NK cell activity. We suggest that further studies that highlight the underlying physiopathological mechanisms contributing towards these interactions should be conducted.
- Published
- 2017
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38. Alteration in Phospholipidome Profile of Myoblast H9c2 Cell Line in a Model of Myocardium Starvation and Ischemia.
- Author
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Sousa B, Melo T, Campos A, Moreira AS, Maciel E, Domingues P, Carvalho RP, Rodrigues TR, Girão H, and Domingues MR
- Subjects
- Animals, Biomarkers metabolism, Cell Line, Fatty Acids metabolism, Rats, Myoblasts metabolism, Myocardial Infarction metabolism, Phospholipids metabolism
- Abstract
Myocardium infarction is one of the most deathly cardiovascular diseases. It is characterized by myocardium ischemia as a result of nutrients depletion and hypoxia. The cell can respond to this injury by autophagy or apoptosis, which determines the evolution and possible recovery of the myocardium infarction. Lipids play an important role in cardiovascular disease. However reports stating lipidome variations in cardiovascular disease are scarce and the role that lipids play in this pathological condition is not completely understood. The aim of this work was to identify changes in lipid profile of a myoblast H9c2 cell line under starvation and ischemia, to better understand and recognize new biomarkers for myocardial infarction. Lipidomic profile was evaluated by HILIC-LC-MS and GC-MS. Cardiac cells showed alterations in phosphatidylcholines PC (34:1) and PC (36:2), lysophosphatidylcholines lyso PC(16:0), lysoPC(18:1) and lysoPC(18:0), phosphatidylethanolamine PE (34:1), phosphatidylserine PS (36:1), phosphatidylinositol PI (36:2), PI (38:3) and PI (38:5), sphingomyelin SM (34:1) and cardiolipins CL(68:4), CL(72:5) and CL(74:7) in ischemia and/or starvation, in comparison with control. Specific differences observed only in starvation were decrease of SM (34:1) and FA (20:4), and increase of PS (36:1). Differences observed only in ischemia were decrease of PC (36:2), lyso PC (16:0) and FA (18:1) and simultaneous increase of FA (16:0), and FA (18:0). Interestingly, PC (34:1) increased in ischemia and decreased in starvation. In conclusion, our work suggests that lipids are potential markers for evaluation of cell fate, either cell death or recovery, which will be useful to improve diagnosis and prognostic of cardiovascular diseases. J. Cell. Physiol. 231: 2266-2274, 2016. © 2016 Wiley Periodicals, Inc., (© 2016 Wiley Periodicals, Inc.)
- Published
- 2016
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39. Enzyme replacement therapy for Anderson-Fabry disease.
- Author
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El Dib R, Gomaa H, Carvalho RP, Camargo SE, Bazan R, Barretti P, and Barreto FC
- Subjects
- Fabry Disease enzymology, Female, Humans, Male, Pain Measurement, Randomized Controlled Trials as Topic, Recombinant Proteins, Time Factors, Trihexosylceramides analysis, Trihexosylceramides blood, Enzyme Replacement Therapy methods, Fabry Disease drug therapy, Isoenzymes administration & dosage, alpha-Galactosidase administration & dosage
- Abstract
Background: Anderson-Fabry disease is an X-linked defect of glycosphingolipid metabolism. Progressive renal insufficiency is a major source of morbidity, additional complications result from cardio- and cerebro-vascular involvement. Survival is reduced among affected males and symptomatic female carriers.This is an update of a Cochrane review first published in 2010, and previously updated in 2013., Objectives: To evaluate the effectiveness and safety of enzyme replacement therapy compared to other interventions, placebo or no interventions, for treating Anderson-Fabry disease., Search Methods: We searched the Cystic Fibrosis and Genetic Disorders Group's Inborn Errors of Metabolism Trials Register (date of the most recent search: 08 July 2016). We also searched 'Clinical Trials' on The Cochrane Library, MEDLINE, Embase and LILACS (date of the most recent search: 24 September 2015)., Selection Criteria: Randomized controlled trials of agalsidase alfa or beta in participants diagnosed with Anderson-Fabry disease., Data Collection and Analysis: Two authors selected relevant trials, assessed methodological quality and extracted data., Main Results: Nine trials comparing either agalsidase alfa or beta in 351 participants fulfilled the selection criteria.Both trials comparing agalsidase alfa to placebo reported on globotriaosylceramide concentration in plasma and tissue; aggregate results were non-significant. One trial reported pain scores measured by the Brief Pain Inventory severity, there was a statistically significant improvement for participants receiving treatment at up to three months, mean difference -2.10 (95% confidence interval -3.79 to -0.41; at up to five months, mean difference -1.90 (95% confidence interval -3.65 to -0.15); and at up to six months, mean difference -2.00 (95% confidence interval -3.66 to -0.34). There was a significant difference in the Brief Pain Inventory pain-related quality of life at over five months and up to six months, mean difference -2.10 (95% confidence interval -3.92 to -0.28) but not at other time points. Death was not an outcome in either of the trials.One of the three trials comparing agalsidase beta to placebo reported on globotriaosylceramide concentration in plasma and tissue and showed significant improvement: kidney, mean difference -1.70 (95% confidence interval -2.09 to -1.31); heart, mean difference -0.90 (95% confidence interval -1.18 to -0.62); and composite results (renal, cardiac, and cerebrovascular complications and death), mean difference -4.80 (95% confidence interval -5.45 to -4.15). There was no significant difference between groups for death; no trials reported on pain.Only two trials compared agalsidase alfa to agalsidase beta. One of them showed no significant difference between the groups regarding adverse events, risk ratio 0.36 (95% confidence interval 0.08 to 1.59), or any serious adverse events; risk ratio 0.30; (95% confidence interval 0.03 to 2.57).Two trials compared different dosing schedules of agalsidase alfa. One of them involved three different doses (0.2 mg/kg every two weeks; 0.1 mg/kg weekly and; 0.2 mg/kg weekly), the other trial evaluated two further doses to the dosage schedules: 0.4 mg/kg every week and every other week. Both trials failed to show significant differences with various dosing schedules on globotriaosylceramide levels. No significant differences were found among the schedules for the primary efficacy outcome of self-assessed health state, or for pain scores.One trial comparing agalsidase alfa to agalsidase beta showed no significant difference for any adverse events such as dyspnoea and hypertension.The methodological quality of the included trials was generally unclear for the random sequence generation and allocation concealment., Authors' Conclusions: Trials comparing enzyme replacement therapy to placebo show significant improvement with enzyme replacement therapy in regard to microvascular endothelial deposits of globotriaosylceramide and in pain-related quality of life. There is, however, no evidence identifying if the alfa or beta form is superior or the optimal dose or frequency of enzyme replacement therapy. With regards to safety, adverse events (i.e., rigors, fever) were more significant in the agalsidase beta as compared to placebo. The long-term influence of enzyme replacement therapy on risk of morbidity and mortality related to Anderson-Fabry disease remains to be established. This review highlights the need for continued research into the use of enzyme replacement therapy for Anderson-Fabry disease.
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- 2016
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40. Record of the First Cases of Human Myiasis by Lucilia cuprina (Diptera: Calliphoridae), Rio de Janeiro, Brazil.
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Azevedo WT, Figueiredo AL, Carvalho RP, Lemos GA, Silva PF, Miranda TA, Lessa CS, and Aguiar VM
- Subjects
- Adolescent, Adult, Aged, Animals, Brazil, Female, Humans, Male, Middle Aged, Diptera, Myiasis parasitology
- Abstract
Myiasis is a disease caused by an infestation of the tissues of vertebrates by developing fly larvae. We document the first cases of human myiasis by Lucilia cuprina (Wiedemann, 1830) in Rio de Janeiro, Brazil, analyzed the epidemiological and clinical profiles of the patients, and their risk factors associated with the occurrence of the disease. Between May 2008 to July 2013, six cases of myiasis caused by larvae of L. cuprina were reported in patients treated in the Federal Hospital of Andaraí, Rio de Janeiro, Brazil. The six patients ranged between 13 and 72 yr old, belonged to various ethnic groups, and both sexes were represented. The affected individuals were relatively uneducated, had low income and poor hygiene habits. Infections were more common in the legs. The following factors were found to predispose individuals to myiasis: trauma, pediculosis, erysipelas, skin infections, and wounds resulting from congestive heart failure. Myiasis by L. cuprina occurred predominantly in the summer when there is abundant rainfall., (© The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)
- Published
- 2015
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41. Evaluation of Antioxidant Capacity of Solanum sessiliflorum (Cubiu) Extract: An In Vitro Assay.
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Mascato DR, Monteiro JB, Passarinho MM, Galeno DM, Cruz RJ, Ortiz C, Morales L, Lima ES, and Carvalho RP
- Abstract
Cubiu is a vegetable of Solanaceae family, native to the Amazon, which is widely distributed through Brazil, Peru, and Colombia. It is used in food, medicine, and cosmetics by native populations. Research has shown that cubiu extracts have antioxidant activities with great biological relevance. We performed a phytochemical screening to identify the main chemical groups that could confer antioxidant activity to this extract. Several tests and qualitative precipitation specific staining for major classes of secondary metabolites were used. Antioxidant capacity in vitro tests (DPPH and ABTS) were also used to assess the extract's ability to sequester free radicals of 70% hydroethanolic and aqueous extracts of cubiu flour. Alkaloids, organic acids, phenols, flavonoid glycosides, and coumarins were found in the hydroethanolic extract while the aqueous extract presented anthocyanins, gums, tannins and mucilage, amino groups, and volatile and fixed acids. For in vitro tests, the IC50 value obtained in the DPPH assay was 606.3 ± 3.5 μg/mL while that for the ABTS assay was 290.3 ± 10.7 µg/mL. Although cubiu extracts present chemical compounds directly related to antioxidant activity, our results show that it has a low antioxidant activity. Additional studies will be needed to isolate and characterize specific compounds to further assess antioxidant activity.
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- 2015
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42. The relevance of the procedures related to the physiotherapy in the interventions in patients with prostate cancer: short review with practice approach.
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Bernardo-Filho M, Barbosa Júnior ML, da Cunha Sá-Caputo D, de Aguiar Ede O, de Lima RP, Santos-Filho SD, de Paoli S, Presta GA, de Oliveira Bravo Monteiro M, and Tavares A
- Abstract
Advances in medical science procedures and their utilization in the field of oncology improved the survival of patients. In consequence, these advances have influenced the practice of physiotherapy. Physiotherapists utilize physical agents with the objective to enhance the health, welfare and quality of life and thus they can play important role in the management and rehabilitation of patients with prostate cancer (PCa). Urinary incontinence (UI) and erectile dysfunction (ED) are effects normally associated with the radical prostatectomy and radiotherapy due to the damage of the muscles of the pelvic floor (MPV). The aim of this work is to present findings related to the PCa and how the physiotherapist can guide the patient in relation to the knowledge and understanding of the anatomic structures related directly with the pelvic floor, the correct breathing and the perception of the MPV, as other muscles of the pelvis. Interventions of the physiotherapy will re-train the muscles of the pelvis by improving the active retention strength of the MPV in order to overcome the insufficiency (mainly the UI and ED) of the injured muscles. In conclusion, it is suggested to consider and to offer to the PCa patients the techniques related to the physiotherapy before and after the treatment.
- Published
- 2014
43. Evaluation of the influence of the antibiotic ciprofloxacin in the development of an Old World screwworm fly, Chrysomya putoria.
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Ferraz AC, Dallavecchia DL, da Silva DC, de Carvalho RP, da Silva Filho RG, and Aguiar-Coelho VM
- Subjects
- Animals, Female, Larva drug effects, Larva growth & development, Male, Pupa drug effects, Pupa growth & development, Anti-Bacterial Agents toxicity, Ciprofloxacin toxicity, Diptera drug effects, Diptera growth & development
- Abstract
Chrysomya putoria (Wiedemann) (Diptera: Calliphoridae), an Old World screwworm fly, is a species with potential for maggot therapy practice and has been described in myiasis and forensic entomology studies. The objective of the present study was to assess the action of different ciprofloxacin concentrations on the growth and development of C. putoria. First instar maggots of the third generation were raised on 60 g of chicken gizzard homogenate in 65% agar diet and received ciprofloxacin chloridrate. Each concentration of the antibiotic tested (3.33 µg/mL, 6.66 µg/mL, and 13.33 µg/mL) and the control (no antibiotic) were replicated four times (40 maggots/replication). The control received distilled water instead of the antibiotic. Maggots were kept in an acclimatized chamber at 30° C during the day and 28° C at night, with 70 + 10% RH and a 14:10 L:D photoperiod. They were weighed in batches of five and stored in test tubes sealed with nylon fabric and elastic. Microsoft Excel and STAT were used for the analysis. The variation among the maggot weight means and the duration of the maggot stage, pupal stage, and time to total development (neolarvae to adult) were analyzed by Student's t-test (α= 5%). The viabilities and the normality rates were compared using ANOVA, and the expected sex ratio frequency was tested by the chisquared test (χ(2)). There was no significant difference among the four treatments regarding mean individual maggot weight, mean duration of the maggot inoculation until abandonment, the duration of the maggot and pupal stages, and the total duration of all stages. The sex ratios found in the four treatments did not differ from the expected. Only treatment 2 (6.66 µg/mL concentration of ciprofloxacin) differed significantly from the control in maggot and total viability. The antibiotic did not seem to alter C. putoria development in the postembryonic period., (This is an open access paper. We use the Creative Commons Attribution 3.0 license that permits unrestricted use, provided that the paper is properly attributed.)
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- 2014
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44. THE INTAKE OF FIBER MESOCARP PASSIONFRUIT (PASSIFLORA EDULIS) LOWERS LEVELS OF TRIGLYCERIDE AND CHOLESTEROL DECREASING PRINCIPALLY INSULIN AND LEPTIN.
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Corrêa EM, Medina L, Barros-Monteiro J, Valle NO, Sales R, Magalães A, Souza FC, Carvalho TB, Lemos JR, Lira EF, Lima ES, Galeno DM, Morales L, Ortiz C, and Carvalho RP
- Abstract
Background: Diabetes mellitus (DM) is a major risk factor for coronary artery disease, renal failure, retinopathy, and neuropathy. Over the last years, there has been an increasing demand in folk medicine for natural sources that could help in the treatment of chronic diseases, including diabetes. The rind of passion fruit (Passiflora edulis f. Flavicarpa) is traditionally used as a functional food due to its high concentration of soluble and insoluble fiber., Objective: The aim of this study was to determine the effect of high-fiber diet albedo of passion fruit on the metabolic and biochemical profile in diabetic rats induced by alloxan (2%)., Design: The passion fruit mesocarp fiber was dried in an oven with circulating air at 60°C and pulverized. We used 32 adult male rats, divided into 4 groups: Wistar group 1 control (GC), Wistar group 2, 15% fiber (GF15), Wistar group 3, 30% fiber (GF30), Wistar group 4, fiber disolved in water (GFH2O). The ratio of passion fruit was prepared according to the AIN 93M guidelines, varying only the source of dietary fiber. The corresponding diet for each group was offered to the animals for 60 days., Results: There was a statically significant decrease in plasma glucose for GFH2O, GF15%, and GF30% groups with 27.0%, 37.4%, and 40.2%, respectively., Conclusion: The use of mesocarp fiber of passion fruit at concentrations of 15% and 30% are an important dietary supplement for the treatment of DM due to its potential hypoglycemic effect, and its ability to reduce triglycerides and VLDL-cholesterol levels with a principal reduction of insulin and leptin.
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- 2014
45. Extract from Eugenia punicifolia is an antioxidant and inhibits enzymes related to metabolic syndrome.
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Lopes Galeno DM, Carvalho RP, Boleti AP, Lima AS, Oliveira de Almeida PD, Pacheco CC, Pereira de Souza T, and Lima ES
- Subjects
- 3T3-L1 Cells, Animals, Enzyme Inhibitors isolation & purification, Enzyme Inhibitors therapeutic use, Free Radical Scavengers isolation & purification, Free Radical Scavengers therapeutic use, Metabolic Syndrome drug therapy, Mice, Plant Extracts isolation & purification, Plant Extracts therapeutic use, Plant Leaves chemistry, Enzyme Inhibitors pharmacology, Free Radical Scavengers pharmacology, Metabolic Syndrome enzymology, Plant Extracts pharmacology, Syzygium chemistry
- Abstract
The present study aimed to investigate in vitro biological activities of extract of Eugenia punicifolia leaves (EEP), emphasizing the inhibitory activity of enzymes related to metabolic syndrome and its antioxidant effects. The antioxidant activity was analyzed by free radicals scavengers in vitro assays: DPPH·, ABTS(·+), O2(·−), and NO· and a cell-based assay. EEP were tested in inhibitory colorimetric assays using α-amylase, α-glucosidase, xanthine oxidase, and pancreatic lipase enzymes. The EEP exhibited activity in ABTS(·+), DPPH·, and O2(·−) scavenger (IC50 = 10.5 ± 1.2, 28.84 ± 0.54, and 38.12 ± 2.6 μg/mL), respectively. EEP did not show cytotoxic effects, and it showed antioxidant activity in cells in a concentration-dependent manner. EEP exhibited inhibition of α-amylase, α-glucosidase, and xanthine oxidase activities in vitro assays (IC50 = 122.8 ± 6.3; 2.9 ± 0.1; 23.5 ± 2.6), respectively; however, EEP did not inhibit the lipase activity. The findings supported that extract of E. punicifolia leaves is a natural antioxidant and inhibitor of enzymes, such as α-amylase, α-glucosidase, and xanthine oxidase, which can result in a reduction in the carbohydrate absorption rate and decrease of risks factors of cardiovascular disease, thereby providing a novel dietary opportunity for the prevention of metabolic syndrome.
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- 2014
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46. Current status of research on fungal bioluminescence: biochemistry and prospects for ecotoxicological application.
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Stevani CV, Oliveira AG, Mendes LF, Ventura FF, Waldenmaier HE, Carvalho RP, and Pereira TA
- Subjects
- Luminescence, Toxicity Tests, Fungi metabolism
- Abstract
Over the last half decade the study of fungal bioluminescence has regained momentum since the involvement of enzymes has been confirmed after over 40 years of controversy. Since then our laboratory has worked mainly on further characterizing the substances involved in fungal bioluminescence and its mechanism, as well as the development of an ecotoxicological bioluminescent assay with fungi. Previously, we proved the involvement of a NAD(P)H-dependent reductase and a membrane-bound luciferase in a two-step reaction triggered by addition of NAD(P)H and molecular oxygen to generate green light. The fungal luminescent system is also likely shared across all lineages of bioluminescent fungi based on cross-reaction studies. Moreover, fungal bioluminescence is inhibited by the mycelium exposure to toxicants. The change in light emission under optimal and controlled conditions has been used as endpoint in the development of toxicological bioassays. These bioassays are useful to better understand the interactions and effects of hazardous compounds to terrestrial species and to assist the assessment of soil contaminations by biotic or abiotic sources. In this work, we present an overview of the current state of the study of fungal luminescence and the application of bioluminescent fungi as versatile tool in ecotoxicology., (© 2013 The American Society of Photobiology.)
- Published
- 2013
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47. THE CONSUMPTION OF RED PUPUNHA (BACTRIS GASIPAES KUNTH) INCREASES HDL CHOLESTEROL AND REDUCES WEIGHT GAIN OF LACTATING AND POST-LACTATING WISTAR RATS.
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Carvalho RP, Lemos JR, de Aquino Sales RS, Martins MG, Nascimento CH, Bayona M, Marcon JL, and Monteiro JB
- Abstract
Introduction: The lactating and post-lactating periods are marked by large metabolic change. Production of milk is 60% lipid dependent. We reported in a recent scientific meeting that Red pupunha palm tree fruit increases HDL cholesterol in lactating rats. This study evaluated if consumption of Red Pupunha by adult female rats has a beneficial impact on the lipid metabolism of lacting and post-lacting adult rats., Objective: Evaluate if consumption of red pupunha has a beneficial effect in the lipid metabolism of lacting and post-lacting adult Wistar rats., Research Methods: Four groups including two for control; (1) control adult lactating rats, (2) control adults post-lactating rats; and two experimental groups; (3) pupunha adults lactating rats and (4) pupunha adult post-lactating rats were evaluated and compared regarding: weight gain, food consumption, plasma total protein, glucose, total lipid, triglycerides, total cholesterol and HDL-cholesterol levels. The mean difference and its 95% confidence intervals were used for group comparisons. Group comparisons were evaluated by using analysis of variance (one-way ANOVA). The statistical significance of the pairwise differences among groups was assessed by using the two-sided Tukey test., Results: There were no important differences in food consumption, plasma glucose, total lipids and triglycerides among groups. The red pupunha lactating group gain less weight showing lower body mass index (BMI) than controls (p < 0.05). Total cholesterol was lower in red pupunha lactating than in controls but not in the red pupunha post-lactating group as compared to controls. Triglycerides were lower in the post-lactating red pupunha group as compared to the control group (p = 0.039) but not for the lactating groups. Red pupunha lactating and post-lactating groups had higher HDL-cholesterol than their corresponding control groups (p ≤ 0.01)., Conclusion: Original findings include the beneficial effect of red pupunha in post-lactating rats increasing the HDL-cholesterol and lowering the BMI. Red pupunha was confirmed to increase HDL-cholesterol in lactating rats. These results suggest that red pupunha is a healthy fruit to be consumed during lactating and post-lactating periods as it is related to better lipid profile and less body weight gain.
- Published
- 2013
48. Prevalence of allergen sensitization, most important allergens and factors associated with atopy in children.
- Author
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Baldaçara RP, Fernandes Mde F, Baldaçara L, Aun WT, Mello JF, and Pires MC
- Subjects
- Adolescent, Brazil epidemiology, Chi-Square Distribution, Child, Child, Preschool, Cross-Sectional Studies, Female, Food Hypersensitivity epidemiology, Food Hypersensitivity immunology, Humans, Infant, Male, Prevalence, Risk Factors, Sensitivity and Specificity, Skin Tests, Allergens immunology, Hypersensitivity, Immediate epidemiology, Hypersensitivity, Immediate immunology
- Abstract
Context and Objective: Knowledge of the profile of allergen sensitization among children is important for planning preventive measures. The objective of this study was to assess the prevalence and profile of sensitization to inhaled allergens and food among children and adolescents in an outpatient population in the city of Palmas., Design and Setting: Cross-sectional study at outpatient clinics in Palmas, Tocantins, Brazil., Methods: Ninety-four patients aged 1-15 years who were attending two pediatric outpatient clinics were selected between September and November 2008. All of the subjects underwent clinical interviews and skin prick tests., Results: A positive skin prick test was observed in 76.6% of the participants (72.3% for inhalants and 28.9% for food allergens). The most frequent allergens were Dermatophagoides pteronyssinus (34%), cat epithelium (28.7%), dog epithelium (21.3%), Dermatophagoides farinae (19.1%), Blomia tropicalis (18.1%), cow's milk (9.6%) and grasses (9.6%). A positive skin prick test correlated with a history of atopic disease (odds ratio, OR = 5.833; P = 0.002), a family history of atopic disease (OR = 8.400; P < 0.001), maternal asthma (OR = 8.077; P = 0.048), pet exposure (OR = 3.600; P = 0.012) and cesarean delivery (OR = 3.367; P = 0.019)., Conclusion: Dermatophagoides pteronyssinus was the most frequent aeroallergen and cow's milk was the most prevalent food allergen. There was a positive correlation between a positive skin prick test and several factors, such as a family history of atopic disease, maternal asthma, pet exposure and cesarean delivery.
- Published
- 2013
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49. Leishmania metacyclogenesis is promoted in the absence of purines.
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Serafim TD, Figueiredo AB, Costa PA, Marques-da-Silva EA, Gonçalves R, de Moura SA, Gontijo NF, da Silva SM, Michalick MS, Meyer-Fernandes JR, de Carvalho RP, Uliana SR, Fietto JL, and Afonso LC
- Subjects
- Animals, Culture Media chemistry, Female, Leishmania, Mice, Mice, Inbred BALB C, Mice, Inbred C57BL, Psychodidae parasitology, Leishmania infantum growth & development, Leishmania infantum metabolism, Leishmania mexicana growth & development, Leishmania mexicana metabolism, Purines metabolism
- Abstract
Leishmania parasites, the causative agent of leishmaniasis, are transmitted through the bite of an infected sand fly. Leishmania parasites present two basic forms known as promastigote and amastigote which, respectively, parasitizes the vector and the mammalian hosts. Infection of the vertebrate host is dependent on the development, in the vector, of metacyclic promastigotes, however, little is known about the factors that trigger metacyclogenesis in Leishmania parasites. It has been generally stated that "stressful conditions" will lead to development of metacyclic forms, and with the exception of a few studies no detailed analysis of the molecular nature of the stress factor has been performed. Here we show that presence/absence of nucleosides, especially adenosine, controls metacyclogenesis both in vitro and in vivo. We found that addition of an adenosine-receptor antagonist to in vitro cultures of Leishmania amazonensis significantly increases metacyclogenesis, an effect that can be reversed by the presence of specific purine nucleosides or nucleobases. Furthermore, our results show that proliferation and metacyclogenesis are independently regulated and that addition of adenosine to culture medium is sufficient to recover proliferative characteristics for purified metacyclic promastigotes. More importantly, we show that metacyclogenesis was inhibited in sand flies infected with Leishmania infantum chagasi that were fed a mixture of sucrose and adenosine. Our results fill a gap in the life cycle of Leishmania parasites by demonstrating how metacyclogenesis, a key point in the propagation of the parasite to the mammalian host, can be controlled by the presence of specific purines.
- Published
- 2012
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50. Alternative diets for Chrysomya putoria, an Old World screwworm fly.
- Author
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Ferraz AC, Dallavecchia DL, da Silva DC, de Carvalho RP, da Silva Filho RG, and Aguiar-Coelho VM
- Subjects
- Animal Feed, Animals, Cattle, Chickens, Female, Larva growth & development, Male, Pupa growth & development, Diptera growth & development
- Abstract
Abstract The purpose of this study was to evaluate the post-embryonic development of Chrysomya putoria (Wiedemann 1818) (Diptera: Calliphoridae) reared on a diet of gizzard or gizzard/agar homogenate, with a diet of beef used as the control. Four replicates per treatment were performed (60 mL of each diet). The gizzard (60%), distilled water, and agar homogenate were combined in a blender. Each replicate consisted of 40 newly hatched larvae of C. putoria (5(th) generation). Each glass beaker containing a diet was inserted into a larger flask containing sawdust, which was covered with a nylon cloth held in place by an elastic band. The larvae were weighed and stored in test tubes sealed with a nylon cloth and an elastic band. The average temperature, measured with a thermohygrograph, was 20.6 °C, and the average relative humidity was 67.7%. The variation in the mean weight of mature larvae and in the duration of the larval, pupal, and total stages (newly hatched larvae to imagoes) were analyzed by Student's t-test (α = 5%), while viability was compared by ANOVA. The sex ratio was evaluated by the chi-squared test. The average duration of the period from the larval to imago stage was 8.868 days on the beef diet, 8.676 on the gizzard diet, and 9.067 on the gizzard/agar homogenate diet. Larval survival rates on these diets were 98, 92, and 73%, respectively, while pupal viabilities were 98, 91, and 71%, respectively, and larva-to-imago viabilities were 93, 83, and 64%, respectively. The duration of the pupal period differed significantly between the blowflies reared on the beef and gizzard/agar homogenate diets. The two diets proved to be good alternatives for rearing C. putoria.
- Published
- 2012
- Full Text
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