Induction of progressive glomerulonephritis by podocyte-specific overexpression of platelet-derived growth factor-D

Kidney Int. 2011 Dec;80(12):1292-305. doi: 10.1038/ki.2011.278. Epub 2011 Aug 24.


Platelet-derived growth factor-D (PDGF-D), normally expressed in podocytes, mediates mesangial cell proliferation in vivo. To study this further, we created transgenic mice with podocyte-specific overexpression of PDGF-D. Hemizygous mice were grossly indistinguishable from wild-type littermates through 11 months of age; however, hemizygous mice older than 4 weeks commonly exhibited increased cell proliferation within the glomerular tuft. Many hemizygous mice also developed widespread segmental glomerulosclerosis and focal extracapillary proliferation with fibrin/fibrinogen deposition, extensive tubulointerstitial damage, proteinuria, and renal insufficiency. Electron microscopy found focal foot process effacement. Renal mRNA expression of podocin and nephrin, as well as the number of glomerular WT-1-positive cells, were significantly reduced in hemizygous compared to wild-type mice, indicating loss and/or dedifferentation of podocytes. PDGF-A, -B, and both PDGF receptor chain mRNAs, fibronectin, type IV collagen, RANTES, MCP-1, and CCR-2 mRNAs were all increased in the renal cortex of PDGF-D transgenic mice. Only 8.5% of newborn mice were homozygous overexpressors exhibiting a mortality rate of 37% at 4 weeks. Thus, podocyte-specific overexpression of PDGF-D caused mesangioproliferative disease, glomerulosclerosis, and crescentic glomerulonephritis. Hence, podocyte-specific growth factor overexpression can induce paracrine mesangial cell proliferation upstream of the filtration flow.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Age Factors
  • Animals
  • Cell Proliferation*
  • Disease Models, Animal
  • Female
  • Gene Expression Regulation
  • Glomerulonephritis / genetics
  • Glomerulonephritis / metabolism*
  • Glomerulonephritis / pathology
  • HEK293 Cells
  • Hemizygote
  • Homozygote
  • Humans
  • Lymphokines / genetics
  • Lymphokines / metabolism*
  • Male
  • Mesangial Cells / metabolism*
  • Mesangial Cells / pathology
  • Mice
  • Mice, Transgenic
  • Paracrine Communication
  • Phenotype
  • Platelet-Derived Growth Factor / genetics
  • Platelet-Derived Growth Factor / metabolism*
  • Podocytes / metabolism*
  • Podocytes / pathology
  • Proteinuria / genetics
  • Proteinuria / metabolism
  • RNA, Messenger / metabolism
  • Rats
  • Renal Insufficiency / genetics
  • Renal Insufficiency / metabolism
  • Transfection
  • Up-Regulation


  • Lymphokines
  • Pdgfd protein, rat
  • Platelet-Derived Growth Factor
  • RNA, Messenger