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Nephrotic Syndrome I : Introduction

Nephrotic Syndrome I : Introduction

Published on: June 19, 2025

La hiperhomocisteinemia promueve la generación inflamatoria de monocitos y acelera la aterosclerosis en ratones

Daqing Zhang¹, Xiaohua Jiang, Pu Fang

¹Department of Pharmacology and Cardiovascular Research Center, Temple University School of Medicine, Philadelphia, PA 19140, USA.

|October 28, 2009

Resumen

La hiperhomocisteinemia (HHcy) conduce a la aterosclerosis mediante el aumento de los subconjuntos inflamatorios de monocitos. Esto ocurre a través del estrés oxidativo mediado por la NAD(P) H oxidasa, promoviendo la acumulación de monocitos en las lesiones.

Área de la Ciencia:

Biología Cardiovascular Biología Cardiovascular
Inmunología Inmunología.
Investigación de Enfermedades Metabólicas.

Sus antecedentes:

La hiperhomocisteinemia (HHcy) es un factor de riesgo conocido para las enfermedades cardiovasculares.
Los monocitos, células inmunes clave, tienen subconjuntos distintos involucrados en la aterogénesis.
Este estudio investigó cómo HHcy influye en la heterogeneidad de los monocitos y contribuye a la aterosclerosis.

Objetivo del estudio:

Para determinar si HHcy modula la heterogeneidad de los monocitos.
Para investigar el papel de HHcy en la promoción de la aterosclerosis.
Aclarar los mecanismos por los cuales HHcy afecta a los subconjuntos de monocitos.

Principales métodos:

Desarrolló un nuevo modelo de ratón (Tg-hCBS apoE(-/-) Cbs(-/-)) con HHcy grave e hipercolesterolemia.
Se utilizó un segundo modelo de ratón HHcy (Tg-S466L Cbs(-/-)) que carecía de hiperlipidemia.
Se analizaron las poblaciones de monocitos y subconjuntos en sangre, bazo y médula ósea.
Realizó experimentos in vitro con l-homocisteína y inhibidores del estrés oxidativo.

Principales resultados:

HHcy grave aceleró la aterosclerosis y la acumulación inflamatoria de monocitos / macrófagos en las lesiones.
HHcy aumentó las poblaciones globales de monocitos y amplió los subconjuntos inflamatorios Ly-6C (hi) y Ly-6C (mid).
In vitro, la l-homocisteína indujo la diferenciación de los monocitos Ly-6C (medio) a través del estrés oxidante mediado por la NAD (P) H oxidasa.

Conclusiones:

HHcy promueve la diferenciación de los subconjuntos de monocitos inflamatorios.
HHcy contribuye al desarrollo de lesiones ateroscleróticas mediante el aumento de la acumulación de monocitos inflamatorios.
El estrés oxidativo dependiente de la NAD(P) H oxidasa es un mecanismo clave que vincula HHcy a la disfunción monocítica en la aterosclerosis.

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