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Generation of Patient-Derived Podocytes from Skin Biopsies
Published on: May 26, 2023
Podocytes in HIV-associated nephropathy
Ting-Chi Lu1, John Cijiang He, Paul E Klotman
1Division of Nephrology, Department of Medicine, Mount Sinai School of Medicine, New York, NY, USA. Ting-chi.Lu@mssm.edu
Nephron. Clinical Practice
|June 16, 2007
Summary
HIV-associated nephropathy (HIVAN) causes kidney failure in HIV-1 patients. All-trans-retinoic acid treatment helps restore podocyte function and reduce proliferation in HIVAN.
Area of Science:
- Nephrology
- Virology
- Cell Biology
Background:
- HIV-associated nephropathy (HIVAN) is a primary cause of end-stage renal disease in HIV-1 positive individuals.
- Pathological hallmarks include collapsing focal segmental glomerulosclerosis and epithelial cell proliferation in Bowman's space.
Purpose of the Study:
- To investigate the mechanisms of podocyte dedifferentiation and proliferation in HIVAN.
- To explore therapeutic modulation of these cellular changes.
Main Methods:
- Analysis of podocyte phenotype, including differentiation markers and cell cycle regulation.
- Investigation of signaling pathways activated by HIV-1 proteins (Nef, Vpr).
- Assessment of all-trans-retinoic acid effects on the cAMP/PKA pathway in podocytes.
Main Results:
- HIV-1 proteins Nef and Vpr induce podocyte dedifferentiation and proliferation.
- Nef activates Src-Stat3 and ras-raf-MAPK signaling pathways.
- All-trans-retinoic acid activates the cAMP/PKA pathway, reversing dedifferentiation and proliferation.
Conclusions:
- HIV-1 proteins directly cause podocyte dysfunction in HIVAN.
- Targeting the cAMP/PKA pathway with all-trans-retinoic acid offers a potential therapeutic strategy for HIVAN.
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