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Endothelial mitochondrial oxidative stress determines podocyte depletion in segmental glomerulosclerosis

Daehn, I. (author)
Casalena, G. (author)
Zhang, T. R. (author)
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Shi, S. L. (author)
Fenninger, F. (author)
Barasch, N. (author)
Yu, L. P. (author)
D'Agati, V. (author)
Schlondorff, D. (author)
Kriz, W. (author)
Haraldsson, Börje, 1957 (author)
Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Institute of Medicine, Department of Molecular and Clinical Medicine
Bottinger, E. P. (author)
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 (creator_code:org_t)
2014-03-03
2014
English.
In: Journal of Clinical Investigation. - : American Society for Clinical Investigation. - 0021-9738. ; 124:4, s. 1608-1621
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Focal segmental glomerular sclerosis (FSGS) is a primary kidney disease that is commonly associated with proteinuria and progressive loss of glomerular function, leading to development of chronic kidney disease (CKD). FSGS is characterized by podocyte injury and depletion and collapse of glomerular capillary segments. Progression of FSGS is associated with TGF-beta activation in podocytes; however, it is not clear how TGF-beta signaling promotes disease. Here, we determined that podocyte-specific activation of TGF-beta signaling in transgenic mice and BALB/c mice with Adriamycin-induced glomerulosclerosis is associated with endothelin-1 (EDN1) release by podocytes, which mediates mitochondrial oxidative stress and dysfunction in adjacent endothelial cells via paracrine EDN1 receptor type A (EDNRA) activation. Endothelial dysfunction promoted podocyte apoptosis, and inhibition of EDNRA or scavenging of mitochondrial-targeted ROS prevented podocyte loss, albuminuria, glomerulosclerosis, and renal failure. We confirmed reciprocal crosstalk between podocytes and endothelial cells in a coculture system. Biopsies from patients with FSGS exhibited increased mitochondrial DNA damage, consistent with EDNRA-mediated glomerular endothelial mitochondrial oxidative stress. Our studies indicate that segmental glomerulosclerosis develops as a result of podocyte-endothelial crosstalk mediated by EDN1/EDNRA-dependent mitochondrial dysfunction and suggest that targeting the reciprocal interaction between podocytes and endothelia may provide opportunities for therapeutic intervention in FSGS.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Endokrinologi och diabetes (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Endocrinology and Diabetes (hsv//eng)

Keyword

GROWTH-FACTOR-BETA
GLOMERULAR-FILTRATION BARRIER
CHRONIC
KIDNEY-DISEASE
NITRIC-OXIDE SYNTHASE
DIABETIC-NEPHROPATHY
NADPH-OXIDASE
TGF-BETA
MESANGIAL CELL
EXPRESSION
INJURY

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ref (subject category)
art (subject category)

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