CONTENIDO DE HIDROXIPROLINA EN FRACCIONES MICROVESICULAR Y EXOSÓMICA DE ORINA COMO MARCADOR DE FIBROSIS RENAL
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2017-07-06
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Jaén: Universidad de Jaén
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[ES] La enfermedad renal crónica es un problema de salud a nivel mundial con una incidencia y
prevalencia en aumento. La fibrosis intersticial puede ocurrir como resultado de la
enfermedad renal crónica. La fibrosis intersticial es un proceso dinámico y complejo donde
participan diferentes células como las células epiteliales tubulares, los fibroblastos, los
macrófagos, etc. Los mediadores moleculares implicados son numerosos e implican vías
tales como el TFG-β1, la BMP, el HGF, el PDGF, etc. Los exosomas son nanovesiculas de
origen endocítico. Tienen entre 30 y 100 nm de diámetro y consisten en una bicapa lipídica
limitante, proteínas transmembrana y un núcleo hidrofílico que contiene proteínas, ARNms y
microARNs. El objetivo principal de este trabajo es investigar si el contenido de
hidroxiprolina presente en las fracciones microvesicular y exosómica de la orina puede ser
utilizado como marcador no invasivo de la fibrosis intersticial renal utilizando un modelo
animal de fibrosis intersticial renal. La hidroxiprolina en las fracciones microvesicular y
exosómica urinarias se ha analizado mediante ELISA. El principal resultado del presente
trabajo es que la cantidad de hidroxiprolina eliminada por la orina, así como en las
fracciones microvesicular y exosómica urinarias de ratas tratadas con cisplatino de manera
crónica se encuentra relacionada con la cantidad de hidroxiprolina y, por tanto, con la
cantidad de colágeno, depositada en el tejido renal. Como consecuencia, la excreción de
hidroxiprolina tanto en orina, como en las fracciones microvesicular y exosómica de la orina
podría ser un potencial marcador no invasivo de la fibrosis intersticial renal.
[EN] Chronic kidney disease is a worldwide health problem. The incidence and prevalence of this patology is in constant increase. Interstitial fibrosis can occur as a result of chronic kidney disease. Interstitial fibrosis is a dynamic and complex process. Cells involved include: tubular epithelial cells, fibroblasts, macrophages, etc. Molecular mediators involved are numerous and involve pathways such as TGF-β, BMP, PDGF, HGF, etc. Exosomes are nanovesicles of endocytic origin. They range between 30 and 100 nm in diameter, and consist of a limiting lipid bilayer, transmembrane proteins and a hydrophilic core containing proteins, mRNAs and microRNAs. The main objective of this work is to investigate if the content of hydroxyproline present in the microvesicular and exosomic fractions of urine can be used as a non-invasive marker of renal interstitial fibrosis to use an animal model of interstitial fibrosis. The hydroxyproline in the microvesicular and exosomal fractions of urine has been analyzed by ELISA. The main result of the present study is that the amount of hydroxyproline eliminated by urine as well as in the microvesicular and exosomic fractions of urine of rats treated with cisplatin in a chronic manner is related to the amount of hydroxyproline and therefore to the amount of collagen, deposited in the renal tissue. As a consequence, hydroxyproline excretion in both urine and microvesicular and exosomal fractions of urine could be a potential non-invasive marker of renal interstitial fibrosis.
[EN] Chronic kidney disease is a worldwide health problem. The incidence and prevalence of this patology is in constant increase. Interstitial fibrosis can occur as a result of chronic kidney disease. Interstitial fibrosis is a dynamic and complex process. Cells involved include: tubular epithelial cells, fibroblasts, macrophages, etc. Molecular mediators involved are numerous and involve pathways such as TGF-β, BMP, PDGF, HGF, etc. Exosomes are nanovesicles of endocytic origin. They range between 30 and 100 nm in diameter, and consist of a limiting lipid bilayer, transmembrane proteins and a hydrophilic core containing proteins, mRNAs and microRNAs. The main objective of this work is to investigate if the content of hydroxyproline present in the microvesicular and exosomic fractions of urine can be used as a non-invasive marker of renal interstitial fibrosis to use an animal model of interstitial fibrosis. The hydroxyproline in the microvesicular and exosomal fractions of urine has been analyzed by ELISA. The main result of the present study is that the amount of hydroxyproline eliminated by urine as well as in the microvesicular and exosomic fractions of urine of rats treated with cisplatin in a chronic manner is related to the amount of hydroxyproline and therefore to the amount of collagen, deposited in the renal tissue. As a consequence, hydroxyproline excretion in both urine and microvesicular and exosomal fractions of urine could be a potential non-invasive marker of renal interstitial fibrosis.
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Biomedicina