What question did this study set out to answer?

To examine the role of the costimulatory molecule B7-1 in podocytes as a modifier of glomerular permselectivity and its contribution to nephrotic syndrome.

May 15, 2004Journal of Clinical InvestigationOpen Access

Induction of B7-1 in podocytes is associated with nephrotic syndrome

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Authors

JRJochen ReiserThe University of Texas Medical Branch at Galveston GGGero von GersdorffUniversity of Cologne MLMartin LoosHeidelberg University

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Implication

Experimental study demonstrates that podocyte B7-1 induction causes proteinuria in mice and human lupus nephritis, highlighting B7-1 as a molecular target for kidney disease.

Key Points

To examine the role of the costimulatory molecule B7-1 in podocytes as a modifier of glomerular permselectivity and its contribution to nephrotic syndrome.
Examined B7-1 expression across genetic, drug-induced, immune-mediated, and bacterial toxin-induced experimental kidney disease models and human lupus nephritis tissue.
Administered low-dose lipopolysaccharide (LPS) to wild-type, severe combined immunodeficiency (SCID), and B7-1-knockout mice to measure in vivo podocyte expression and proteinuria.
Stimulated cultured podocytes with LPS via toll-like receptor-4 to analyze actin cytoskeleton remodeling and slit diaphragm protein reorganization.
B7-1 was induced in podocytes across multiple experimental nephrotic syndrome models and correlated with disease severity in human lupus nephritis biopsies.
Low-dose LPS rapidly induced podocyte B7-1 and nephrotic-range proteinuria in wild-type and SCID mice, while B7-1-deficient mice were protected from proteinuria.
Toll-like receptor-4 activation by LPS directly disrupted the podocyte actin cytoskeleton and reorganized essential slit diaphragm proteins in vitro.

Cite This Study

Reiser et al. (2004) studied this question.

synapsesocial.com/papers/6a16e2c7b13aec50ea6b99c0 https://doi.org/10.1172/jci20402

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Implication

Experimental study demonstrates that podocyte B7-1 induction causes proteinuria in mice and human lupus nephritis, highlighting B7-1 as a molecular target for kidney disease.

Induction of B7-1 in podocytes is associated with nephrotic syndrome

Discussion

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Implication

Key Points

Cite This Study

Induction of B7-1 in podocytes is associated with nephrotic syndrome

Discussion

Member takes

Implication

Key Points

Cite This Study

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