10 results on '"Metaloproteinasas de la matriz"'
Search Results
2. Expression of matrix factors in the process of neovascularization of intervertebral disc
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Pedro Henrique Isoldi Pohl, Thais Cuperman, Thomas Lozito, Takashi Yurube, Rocky Tuan, James Kang, Nam Vo, and Luciano Miller Reis Rodrigues
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Disco intervertebral ,Neovascularización patológica ,Metaloproteinasas de la matriz ,Orthopedic surgery ,RD701-811 ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
OBJECTIVE: To investigate the effects of proteins products of endothelial cells (ECs) on the annulus fibrosus (AF) cell metabolism in an in vitro culture.METHODS:Human AF cells were expanded in monolayer cultures and treated with proteins from the medium of cell line HMEC-1 (Human Microvascular Endothelial Cells) (125µg/ml). After 72h of treatment RNA was isolated from AF cells for analysis of gene expression and the culture medium was collected for protein expression analysis.RESULTS: The qRT-PCR analysis demonstrated increased gene expression of matrix metalloproteinases (MMPs) in AF cells treated with protein products of endothelial cells compared with cells from control group of AF cells: MMP-1 243.10 times (pCONCLUSIONS: In this study, we observed that the proteins produced by ECs induced the MMPs expression and suppressed the TIMPs as well as the aggrecan in primary cells of the human intervertebral disc, targeting the development of potential treatments for intervertebral disc degeneration and associated discogenic pain.
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- 2015
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3. Metaloproteinasas de la matriz extracelular y su participación en el proceso de cicatrización.
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Ferranti-Ramos, Andrea, Garza-Garza, Gregorio, Bátiz-Armenta, Jorge, Martínez-Delgado, Guillermo, De la Garza-Álvarez, Francisco, Martínez-Menchaca, Héctor R., and Rivera-Silva, Gerardo
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- 2017
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- View/download PDF
4. Expression of matrix metalloproteinases and their degradation products are associated with blood glucose levels in patients with active tuberculosis
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Cadillo Hernandez, Ronald Armando, Ugarte Gil, César Augusto, and Montes Delgado, Martín
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purl.org/pe-repo/ocde/ford#3.02.07 [http] ,Tuberculosis ,Metaloproteinasas de la Matriz ,Hiperglicemia ,purl.org/pe-repo/ocde/ford#3.02.18 [http] ,purl.org/pe-repo/ocde/ford#3.03.08 [http] - Abstract
Antecedentes: Dentro de los factores que intervienen en la degradación y remodelación del tejido pulmonar por tuberculosis (TB) se encuentran las MMPs, MDPs y TIMPs. Asimismo, se sabe que la hiperglicemia conlleva a mayor riesgo de fracaso en el tratamiento de TB. La hiperglicemia podría mediar la actividad de dichos biomarcadores de forma indirecta mediante el incremento del estrés oxidativo, que puede ser cuantificado mediante la expresión de HO-1. Materiales y Métodos: estudio piloto de tipo descriptivo. Se midió la concentración de los biomarcadores en muestras de lavado bronco-alveolar (BALF) utilizando ELISAs y Luminex©. Se realizó análisis univariado mediante SPSS Statistics-26®. Objetivo: Comparar los niveles de MMPs, MDPs, TIMPs y HO-1 en BALF de pacientes con TB e hiperglicemia y pacientes con TB normoglicémicos y evaluar la asociación entre la hiperglicemia y estrés oxidativo con dichas variables. Resultados: El grupo con TB-Hiperglicemia presento mayor presencia de cavernas comparado al grupo TB-Normoglicemia. La concentración media de MMP-1(85.5 pg/ml) y PIIIN (4.5 ng/ml) fue mayor en el grupo de TB-Hiperglicemia (p=0.715 y 0.114 respectivamente). En el análisis de clúster jerárquico, el único grupo que logra formar un clúster es el de TB-Hiperglicemia. Finalmente, el grupo TB-Hiperglicemia y TB-Normoglicemia presentaron mayor número de correlaciones entre los biomarcadores estudiados(p
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- 2022
5. Metalloproteinases 1 and 3 as Potential Biomarkers in Breast Cancer Development
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Amanda Rocío González Ramírez, Sandra Ríos Arrabal, Pablo Torne Poyatos, Alejandro Alonso, Angela Ximena Argote Camacho, María Auxiliadora Olivares Urbano, Juan David Rejón García, María Isabel Núñez, [Argote Camacho,AX] Department of Surgery, Clínico San Cecilio University Hospital, Granada, Spain. [González Ramírez,AR] Bio-Health Research Foundation of Eastern Andalusia—Alejandro Otero (FIBAO), Granada, Spain. [Pérez Alonso,AJ] Department of Surgery, Virgen de las Nieves University Hospital, Granada, Spain. [Rejón García,JD] Andalusian Tumour Bank Network, Granada, Spain. [Olivares Urbano,MA, Ríos Arrabal,S, Nuñez,MI] Department of Radiology and Physical Medicine, University of Granada, Granada, Spain. [Torné Poyatos,P] Department of Surgery and Its Specialties, University of Granada, Granada, Spain. [Nuñez,MI] Institute of Biopathology and Regenerative Medicine (IBIMER), University of Granada, Granada, Spain. [Nuñez,MI] Biosanitary Research Institute, ibs.Granada, Granada, Spain., and This research was funded by Fundación Progreso Salud, grant number PI-0730-2013, and by ISCIII, grant number PIE16/00045.
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Oncology ,Chemicals and Drugs::Enzymes and Coenzymes::Enzymes::Hydrolases::Peptide Hydrolases::Endopeptidases::Metalloendopeptidases::Collagenases::Matrix Metalloproteinase 2 [Medical Subject Headings] ,Chemicals and Drugs::Enzymes and Coenzymes::Enzymes::Hydrolases::Peptide Hydrolases::Metalloproteases [Medical Subject Headings] ,Metaloproteinasas de la matriz ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics as Topic::Epidemiologic Studies::Case-Control Studies::Retrospective Studies [Medical Subject Headings] ,Disease ,Matrix metalloproteinase ,medicine.disease_cause ,Chemicals and Drugs::Enzymes and Coenzymes::Enzymes::Hydrolases::Peptide Hydrolases::Endopeptidases::Metalloendopeptidases::Collagenases::Matrix Metalloproteinase 1 [Medical Subject Headings] ,Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Primates::Haplorhini::Catarrhini::Hominidae::Humans [Medical Subject Headings] ,Cohort Studies ,Chemicals and Drugs::Enzymes and Coenzymes::Enzymes::Hydrolases::Peptide Hydrolases::Endopeptidases::Metalloendopeptidases::Matrix Metalloproteinases::Matrix Metalloproteinases, Secreted::Matrix Metalloproteinase 3 [Medical Subject Headings] ,MMP inhibitors ,Medicine ,Breast ,Biology (General) ,Spectroscopy ,Persons::Persons::Age Groups::Adult::Aged [Medical Subject Headings] ,Aged, 80 and over ,Chemicals and Drugs::Enzymes and Coenzymes::Enzymes::Hydrolases::Peptide Hydrolases::Metalloproteases::Metalloendopeptidases::Collagenases::Matrix Metalloproteinase 9 [Medical Subject Headings] ,Mortality rate ,Chemicals and Drugs::Amino Acids, Peptides, and Proteins::Proteins::Proteinase Inhibitory Proteins, Secretory::Tissue Inhibitor of Metalloproteinases [Medical Subject Headings] ,Proteolytic enzymes ,Tissue Inhibitor of Metalloproteinases ,General Medicine ,Diseases::Neoplasms::Neoplastic Processes::Carcinogenesis::Cocarcinogenesis [Medical Subject Headings] ,Middle Aged ,Immunohistochemistry ,Computer Science Applications ,Chemistry ,Matrix Metalloproteinase 9 ,Disease Progression ,Matrix Metalloproteinase 2 ,Female ,Matrix Metalloproteinase 3 ,Matriz extracelular ,MMPs ,Matrix Metalloproteinase 1 ,Chemicals and Drugs::Biological Factors::Biological Markers::Biomarkers, Pharmacological [Medical Subject Headings] ,medicine.medical_specialty ,QH301-705.5 ,extracellular matrix ,Breast Neoplasms ,Catalysis ,Article ,metalloproteinases ,Inorganic Chemistry ,Breast cancer ,breast cancer ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Data Collection::Vital Statistics::Morbidity::Incidence [Medical Subject Headings] ,Internal medicine ,Biomarkers, Tumor ,Humans ,Metaloproteasas ,immunohistochemical expression ,Physical and Theoretical Chemistry ,Molecular Biology ,QD1-999 ,Linfedema del cáncer de mama ,Diseases::Neoplasms::Neoplasms by Site::Breast Neoplasms [Medical Subject Headings] ,Aged ,Retrospective Studies ,Geographical Locations::Geographic Locations::Europe::Spain [Medical Subject Headings] ,Diseases::Pathological Conditions, Signs and Symptoms::Pathologic Processes::Disease Attributes::Disease Progression [Medical Subject Headings] ,business.industry ,Organic Chemistry ,Inhibidores de la metaloproteinasa de la matriz ,biomarkers ,Retrospective cohort study ,Persons::Persons::Age Groups::Adult::Middle Aged [Medical Subject Headings] ,medicine.disease ,Biomarcadores ,Persons::Persons::Age Groups::Adult::Aged::Aged, 80 and over [Medical Subject Headings] ,Spain ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics as Topic::Epidemiologic Studies::Cohort Studies [Medical Subject Headings] ,diagnostic factors ,Case-Control Studies ,Metalloproteases ,business ,Carcinogenesis ,epithelial-to-mesenchymal transition (EMT) - Abstract
Breast cancer continues to be one of the main causes of morbidity and mortality globally and was the leading cause of cancer death in women in Spain in 2020. Early diagnosis is one of the most effective methods to lower the incidence and mortality rates of breast cancer. The human metalloproteinases (MMP) mainly function as proteolytic enzymes degrading the extracellular matrix and plays important roles in most steps of breast tumorigenesis. This retrospective cohort study shows the immunohistochemical expression levels of MMP-1, MMP-2, MMP-3, and MMP-9 in 154 women with breast cancer and 42 women without tumor disease. The samples of breast tissue are assessed using several tissue matrices (TMA). The percentages of staining (≤50%–>, 50%) and intensity levels of staining (weak, moderate, or intense) are considered. The immunohistochemical expression of the MMP-1-intensity (p = 0.043) and MMP-3 percentage (p = 0.018) and intensity, (p = 0.025) present statistically significant associations with the variable group (control–case), therefore, expression in the tumor tissue samples of these MMPs may be related to the development of breast cancer. The relationships between these MMPs and some clinicopathological factors in breast cancer are also evaluated but no correlation is found. These results suggest the use of MMP-1 and MMP-3 as potential biomarkers of breast cancer diagnosis.
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- 2021
6. The impact of hypoestrogenism and occlusal function on MMP1, MMP8 and MMP13 expression in the odontogenic region in rats
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João Armando Brancher, Kesly Mary Ribeiro Andrades, João César Zielak, Paulo Nelson-Filho, Flares Baratto-Filho, Claudia Salete Judachesci, Isabela Ribeiro Madalena, Sabrina Schulze, Lucas Alexandre Ramazzotto, and Erika Calvano Küchler
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medicine.medical_specialty ,MMP1 ,medicine.drug_class ,Metaloproteinasas de la matriz ,Hypoestrogenism ,MMP8 ,Internal medicine ,Osteogenese ,Gene expression ,Occlusion ,medicine ,Osteogénesis ,Osteogenesis ,Saco Dentário ,General Environmental Science ,business.industry ,Estrógeno ,Dental Sac ,Estrogens ,Hyperfunction ,medicine.disease ,Estrógenos ,Endocrinology ,Real-time polymerase chain reaction ,Matrix metalloproteinases ,Estrogen ,Saco dental ,General Earth and Planetary Sciences ,Metaloproteinases da matriz ,business - Abstract
Background: The impact of estrogen deficiency and occlusion in the matrix metalloproteinases (MMPs) expression in dental tissues has not yet been elucidated. Objective: To evaluate the influence of estrogen deficiency and occlusal hypofunction and hyperfunction on the gene expression of MMP1, MMP8 and MMP13 in the odontogenic region of teeth in continuous growth, in the murine model. Material and methods: Rats (Wistar Hannover lineage) were divided into two groups according to the intervention received: Hypoestrogenism Group - ovariectomy surgery and Control Group - fictitious surgery. Occlusal hypofunction and hyperfunction conditions were also established in all animals (each animal presented both conditions). After euthanasia, the hemimandibles were removed to evaluate the gene expression through real time PCR. T-test was used to compare the mean differences between groups (P0.05). A statistically significant difference of the relative MMP13 expression between the occlusal hypofunction and hyperfunction tooth was observed (P=0.03). In the hypoestrogenism group, MMP13 was overexpressed in hypofunction tooth (P=0.045). Conclusion: Occlusal function affects MMP13 expression in the odontogenic region, in murine model. Antecedentes: El impacto de la deficiencia de estrógeno y oclusión dentaria sobre la expresión de metaloproteinasas de la matriz (MMPs) en los tejidos dentales aún no ha sido suficientemente estudiada. Objetivo: Evaluar la influencia de la deficiencia de estrógeno y función oclusal (hipo- e hiperfunción) sobre la expresión génica de MMP1, MMP8 y MMP13 en la región odontogénica de dientes con erupción continua, usando un modelo murino. Materiales y métodos: Ratas del linaje Wistar-Hannover fueron divididas en dos grupos de acuerdo a la intervención recibida: grupo con hipoestrogenismo - cirugía de ovariectomía, y grupo control - cirugía ficticia. Fueron creadas condiciones de hipo- e hiperfunción oclusal en los animales (cada animal presentó ambas condiciones). Una vez realizada la eutanasia, las hemimandíbulas fueron separadas para evaluar la expresión génica por medio de PCR en tiempo real. Se utilizó la prueba t para comparación entre los grupos (P=0,05). Resultados: No hubo diferencia estadísticamente significativa en la expresión genética relativa de MMP1, MMP8 y MMP13 entre el grupo con hipoestrogenismo y el grupo control (P>0,05). Se observó una diferencia estatísticamente significativa en la expresión de MMP13 entre los grupos con hipo- e hiperfunción oclusal (P=0,03). MMP13 fue sobre expresada en los dientes con hipofunción del grupo de animales con hipoestrogenismo (P=0,045). Conclusión: La función oclusal afecta la expresión de MMP13 en la región odontogénica, en modelo murino. Introdução: O impacto da deficiência de estrógeno e da oclusão na expressão das metaloproteinases da matriz (MMPs) nos tecidos dentários ainda não foi elucidado. Objetivo: Avaliar a influência da deficiência de estrógeno e da hipofunção e hiperfunção oclusal na expressão gênica de MMP1, MMP8 e MMP13 na região odontogênica de dentes em crescimento contínuo, no modelo murino. Material e métodos: Ratas (linhagem Wistar Hannover) foram divididas em dois grupos de acordo com a intervenção recebida: Grupo Hipoestrogenismo - cirurgia de ovariectomia e Grupo Controle - cirurgia fictícia. Condições de hipofunção e hiperfunção oclusal também foram estabelecidas em todos os animais (cada animal apresentava ambas as condições). Após a eutanásia, as hemimandíbulas foram retiradas para avaliação da expressão gênica por meio de PCR em tempo real. O teste t foi usado para comparar as diferenças médias entre os grupos (P0,05). Foi observada uma diferença estatisticamente significativa da expressão relativa de MMP13 entre a hipofunção oclusal e a hiperfunção dentária (P=0,03). No grupo de hipoestrogenismo, MMP13 foi superexpresso no dente com hipofunção (P=0,045). Conclusão: A função oclusal afeta a expressão de MMP13 na região odontogênica, em modelo murino.
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- 2021
7. Biomarcadores para la evaluación y diagnóstico del síndrome de ojo seco: una revisión
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Angulo Sánchez, Sara Viviana, Ortiz Avila, David Alejandro, Angulo Sánchez, Sara Viviana, and Ortiz Avila, David Alejandro
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Introducción: El síndrome de ojo seco es una enfermedad en la que se generan signos y síntomas que conducen a alteraciones oculares prolongadas, por lo tanto, es relevante establecer con precisión la etiología de la enfermedad con la finalidad de establecer el tratamiento más efectivo, de allí, la importancia del desarrollo de exámenes innovadores como son los biomarcadores, los cuales permiten identificar con mayor precisión el cuadro clínico. Por esta razón, el presente trabajo pretende describir los principales avances de los biomarcadores de la superficie ocular y reconocer su aplicación clínica para el diagnóstico de ojo seco entre los años 2013 a 2018. Metodología: Se analizó literatura sobre biomarcadores empleados para el diagnóstico del ojo seco, mediante una revisión sistemática tipo narrativa de 2013 a 2018 por medio de los descriptores controlados “Dry Eye Syndrome” “biomarkers” “tear proteins” “eye proteins” seleccionados en DeCS y Pubmed; la búsqueda arrojó 48 estudios, de los cuales seleccionamos 21 para el análisis. Resultados: Son diversas las proteínas lagrimales que pueden ser relacionadas con la presencia y ausencia de la enfermedad, es vital que los biomarcadores sean valorados como una herramienta alternativa para diagnosticar con facilidad y precisión la enfermedad del ojo seco. Discusión: Los biomarcadores permiten reconocer los procesos patógenos y biológicos del síndrome de ojo seco, al reflejar el estado de la superficie ocular en presencia o ausencia de signos y síntomas, facilitando el diagnóstico precoz, seguimiento, tratamiento y control de la enfermedad., Introduction: Dry eye syndrome is a disease in which signs and symptoms that lead to prolonged ocular alterations occur, therefore, it is relevant to accurately establish the etiology of the disease with the configuration of establishing the most effective treatment, hence the development of innovative exams such as biomarkers selected with greater precision the clinical picture. For this reason, the present work aims to describe the main advances of biomarkers of the ocular surface and to recognize their clinical application for the diagnosis of dry eye between 2013 and 2018. Metodology: Literature on biomarkers used for the diagnosis of dry eye was analyzed, by means of a systematic narrative review from 2013 to 2018 by means of the controlled descriptors “Dry Eye Syndrome” “biomarkers” “tear proteins” “eye proteins” selected in DeCS and Pubmed; The search yielded 48 studies and 21 studies were selected for the analysis. Results: There are several tear proteins that can be related to the presence and absence of the disease, it is vital that biomarkers are evaluated as an alternative tool to easily and accurately diagnose dry eye disease. Discussion: Biomarkers allow to recognize the pathogenic and biological processes of dry eye syndrome, reflecting the state of the ocular surface in the presence or absence of signs and symptoms, facilitating early diagnosis, monitoring, treatment and control of the disease.
- Published
- 2020
8. Efecto de la aplicación de un flavonoide en el comportamiento de la interfase adhesiva resina-dentina
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Betancourt, Diego Enrique, Castellanos, Jaime, and Castellanos, Jaime [0000-0003-1596-8383]
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Flavonoids ,Bonding ,Matrix metalloproteinases ,WU 100 ,Adhesión ,Metaloproteinasas de la matriz ,Dentin ,Dentina ,Interfase ,Interface ,Flavonoides - Abstract
Es bien sabido que los adhesivos hidrofílicos actuales producen una capa híbrida que es inestable con el tiempo, en parte por la activación de las metaloproteinasas de la matriz extracelular (MMP) que degradan la red de colágeno expuesta por el acondicionamiento ácido y se infiltran parcialmente por los monómeros de resina. El objetivo de este estudio es evaluar el efecto de la aplicación de un flavonoide experimental (MRT-1) en la interfase adhesiva dentina-resina, en términos de actividad de MMP y resistencia de unión microtensil (μTBS). el ensayo de actividad MMP se realizó en bloques de dentina, que se obtuvieron de terceros molares bajo consentimiento informado. Todas las muestras se desmineralizaron con ácido fosfórico al 10% overnight y se distribuyeron aleatoriamente en los grupos de prueba. La actividad de MMP se midió con un kit genérico de ensayo de actividad MMP. Para la prueba μTBS, se eliminó el esmalte oclusal de 20 terceros molares repartidos aleatoriamente en 4 grupos de prueba (MRT-1 a 600 μM, etanol al 100%, clorhexidina al 0.2% y control negativo, para el protocolo adhesivo grabado-enjuague). En cada grupo se aplicó el tratamiento adhesivo propuesto y se construyeron bloques de resina que, posteriormente, se seccionaron en barras de 1,0 mm2 para hacer la prueba tensil inmediata y después de 6 meses de almacenamiento en saliva artificial. el ensayo de actividad de MMP mostró que MRT-1 al 600 μM (120s) fue eficaz para disminuir la actividad de MMP en un 74% con respecto al grupo control. En la prueba μTBS, MRT-1 al 600 μM, clorhexidina al 0.2% y etanol al 100%, aplicados de manera independiente después del grabado ácido de la dentina, no interfirieron con la adhesión. MRT-1 al igual que la clorhexidina mantuvo los mismos valores de resistencia de unión durante 6 meses, mientras que el control negativo disminuyó los valores de μTBS después del envejecimiento. el tratamiento con MRT-1, clorhexidina y etanol estabilizó la interfase dentina-resina durante 6 meses. El uso de un flavonoide experimental (MRT-1) durante 2 min sería útil en un protocolo clínico de adhesión para preservar la interfase dentina-resina. Magíster en Ciencias Odontológicas Maestría It is well-known that conventional hydrophilic adhesives produce a hybrid layer that is unstable over time, in part because of the activation of extracellular matrix metalloproteinases (MMPs) that degrade the collagen network exposed by acid conditioning. In addition, the network can be partially infiltrated by resin monomers. The aim of this study is to evaluate the effects of the application of an experimental flavonoid (MRT-1) on the dentin-resin adhesive interface in terms of MMP activity and microtensile bond strength (μTBS). An MMP activity assay was performed on dentin beams obtained from third molars with informed consent. The specimens were demineralized with 10% phosphoric acid overnight and randomly divided into test groups. The MMP activity was measured with a generic MMP activity assay kit. For the μTBS test, occlusal enamel was removed from 20 third molars and divided randomly into 4 test groups (600 μM MRT-1, 100% ethanol, 0.2% chlorhexidine, and negative control groups for etch-rinse adhesive protocol). Each group was subjected to the proposed adhesive treatment, and composite buildups were constructed and sectioned in sticks of 1.0 mm2 for immediate tension tests and after 6 months of storage in artificial saliva. The MMP activity assay showed that 600 μM MRT-1 (120 s) effectively decreased the MMP activity by 74% compared to the control group. In the μTBS test, 600 μM MRT-1, 2% chlorhexidine and 100% ethanol applied after acid etching did not interfere with the μTBS of the dentin. MRT-1, similar to chlorhexidine, maintained the same bond strength values over 6 months, while the negative control showed decreased μTBS values after aging. MRT-1, chlorhexidine, and ethanol treatments stabilized the dentin-resin interface over 6 months. Application of the experimental flavonoid MRT-1 for 2 min would be useful in a dentin-bonding clinical protocol to preserve the dentin-resin interface.
- Published
- 2019
9. Metaloproteinasas de la matriz extracelular y su participación en el proceso de cicatrización
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Ferranti Ramos, Andrea, Garza Garza, Gregorio, Bátiz Armenta, Jorge, Martínez Delgado, Guillermo, Garza Álvarez, Francisco de la, Martínez Menchaca, Héctor R., Rivera, Gerardo, Ferranti Ramos, Andrea, Garza Garza, Gregorio, Bátiz Armenta, Jorge, Martínez Delgado, Guillermo, Garza Álvarez, Francisco de la, Martínez Menchaca, Héctor R., and Rivera, Gerardo
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Matrix metalloproteinases are essential for structural maintenance of extracellular matrix enzymes, as well as degradation in situations where tissue repair process is warranted. Objective: To review the most current aspects of matrix metalloproteinases and their role in the healing process. Research Methodology: A review of about 95 papers was conducted during the period from July 18, 2015 to September 20, 2016; PubMed, Scopus, Scielo and Science Direct were used. Results: There are six subfamilies of metalloproteinases: collagenases, stromalysins, elastases, gelatinases, matrilysins and metalloproteinases associated with the plasma membrane. Vascular endothelial cells secrete them where there is epithelial damage and a healing process is required. Conclusions: Metalloproteinases are zinc dependent endopeptidases that are essential for the maintenance and degradation of the extracellular matrix. When the adjustment mechanism fails and matrix metalloproteinases are overexpressed, poor healing processes occur, causing problems such as liver chronic wounds, keloids or hypertrophic scars, pterygium, pulmonary and liver fibrosis, among other clinical conditions. MÉD.UIS. 2017;30(2):55-62., Las metaloproteinasas son enzimas fundamentales para el mantenimiento estructural de la matriz extracelular, así como para su degradación en situaciones donde se requiere un proceso de reparación tisular. Objetivo: realizar una revisión de los aspectos más actuales de las metaloproteinasas y su papel en la cicatrización. Metodología de búsqueda: se realizó una revisión de 95 artículos, durante el período comprendido entre el 18 de julio de 2015 y 20 de septiembre de 2016 se utilizó las bases de datos Medline, Scopus, Scielo y Science Direct. Resultados: existen seis subfamilias de metaloproteinasas: colagenasas, estromalisinas, elastasas, gelatinasas, matrilisinas y las metaloproteinasas asociadas a la membrana plasmática. Las células endoteliales vasculares las secretan en donde hay daño epitelial y serequiere de un proceso de cicatrización. Conclusiones: las metaloproteinasas son endopeptidasas dependientes de zinc fundamentales para el mantenimiento y degradación de la matriz extracelular. Cuando el mecanismo de regulación falla y las metaloproteinasas tiene una sobreexpresión, ocurren procesos de cicatrización deficientes, condicionando la aparición de heridas crónicas, cicatrices hipertróficas o queloides, pterigión, fibrosis pulmonar y hepática, entre otras condiciones. MÉD.UIS. 2017;30(2):55-62.
- Published
- 2017
10. Expression of matrix factors in the process of neovascularization of intervertebral disc
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Thais Cuperman, Luciano Miller Reis Rodrigues, James D. Kang, Rocky S. Tuan, Takashi Yurube, Nam Vo, Thomas P. Lozito, and Pedro Pohl
- Subjects
lcsh:Diseases of the musculoskeletal system ,Metaloproteinasas de la matriz ,Neovascularization pathologic ,Disco intervertebral ,Neovascularización patológica ,Intervertebral disc ,lcsh:RD701-811 ,Matrix metalloproteinases ,lcsh:Orthopedic surgery ,Neovascularização patológica ,Orthopedics and Sports Medicine ,Surgery ,Neurology (clinical) ,lcsh:RC925-935 ,Metaloproteinases da matriz - Abstract
OBJECTIVE: To investigate the effects of proteins products of endothelial cells (ECs) on the annulus fibrosus (AF) cell metabolism in an in vitro culture.METHODS:Human AF cells were expanded in monolayer cultures and treated with proteins from the medium of cell line HMEC-1 (Human Microvascular Endothelial Cells) (125µg/ml). After 72h of treatment RNA was isolated from AF cells for analysis of gene expression and the culture medium was collected for protein expression analysis.RESULTS: The qRT-PCR analysis demonstrated increased gene expression of matrix metalloproteinases (MMPs) in AF cells treated with protein products of endothelial cells compared with cells from control group of AF cells: MMP-1 243.10 times (pCONCLUSIONS: In this study, we observed that the proteins produced by ECs induced the MMPs expression and suppressed the TIMPs as well as the aggrecan in primary cells of the human intervertebral disc, targeting the development of potential treatments for intervertebral disc degeneration and associated discogenic pain. OBJETIVO:Analisar o efeito de produtos proteicos de células endoteliais (CEs) sobre o metabolismo de células de ânulo fibroso (AF) em ambiente controlado de cultura celular in vitro.MÉTODOS: Células de AF humano foram expandidas em camada única e tratadas com proteínas obtidas a partir do meio de cultura de células da linhagem celular HMEC-1 (Human Microvascular Endothelial Cells) (125µg/ml). Após 72h de tratamento, isolou-se RNA das células de AF para análise da expressão gênica e coletou-se meio de cultura para análise de expressão proteica.RESULTADOS: A análise da qRT-PCR demonstrou aumento da expressão gênica das metaloproteinases de matriz (MMPs) nas células de AF tratadas com produtos proteicos das células endoteliais, em comparação com grupo controle de células de AF: MMP-1 243,10 vezes (p < 0,05), MMP-2 1,37 vezes (p < 0,05), MMP-3 39,83 vezes (p < 0,05) e MMP13 5,70 vezes (p < 0,05). Em contraste, os inibidores teciduais das metaloproteinases (TIMPs) apresentaram supressão da expressão gênica de TIMP-2 (0,55 vezes) (p < 0,05) e TIMP-3 (0,60 vezes) (p < 0,05) nos grupos expostos. A expressão do gene agrecan (0,83 vezes) (p < 0,05), componente importante da matriz extracelular, também estava diminuída. Foi realizada detecção de MMP-1 e MMP-3, confirmando os resultados de PCR através de técnica de Western Blot.CONCLUSÕES: Neste estudo observamos que proteínas produzidas pelas CEs induziram a expressão de MMPs e suprimiram a expressão de TIMPs e agrecan nas células primárias do disco intervertebral humano, objetivando desenvolvimento de potenciais terapias no tratamento da degeneração do disco intervertebral e dor discogênica associada. OBJETIVO: Analizar el efecto de los productos de proteína de las células endoteliales (CEs) en el metabolismo celular del anillo fibroso (AF) en sistema in vitro de cultivo controlado.MÉTODOS: Las células del AF humano se ampliaron en monocapa y se las trató con las proteínas obtenidas a partir de los medios de cultivo de la línea de células HMEC-1 (Human Microvascular Endothelial Cells) (125µg/ml). Después de 72h de tratamiento, se aisló el ARN de las células de AF para el análisis de la expresión génica y se recogió el medio de cultivo para el análisis de expresión de la proteína.RESULTADOS: El análisis de qRT-PCR demostró una mayor expresión génica de las metaloproteinasas de matriz (MMP) en las células tratadas con productos de proteína de AF en las células endoteliales, en comparación con el grupo de control de células AF: MMP-1 243,10 veces (p < 0,05), MMP-2 1,37 veces (p < 0,05), MMP-3 39,83 veces (p < 0,05) y MMP-13 5,70 veces (p < 0,05). En contraste, los inhibidores tisulares de las metaloproteinasas (TIMP), presentaron supresión de la expresión del gen TIMP-2 (0,55 veces) (p < 0,05) y TIMP-3 (0,60 veces) (p < 0,05) en los grupos expuestos. La expresión génica de agrecano (0,83 veces) (p < 0,05), importante componente de la matriz extracelular, también se redujo. La detección de MMP-1 y de MMP-3 fue realizada y se confirmaron los resultados de la PCR mediante la técnica Western Blot.CONCLUSIONES: En el presente estudio se observó que las proteínas producidas por las CEs indujeron la expresión de MMP y suprimieron la expresión del TIMP y de agrecano en células primarias del disco intervertebral humano, con el objetivo de desarrollar posibles tratamientos para la degeneración del disco intervertebral y el dolor discogénico asociado.
- Published
- 2015
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