Abstract
Background: Human immunodeficiency virus-associated nephropathy (HIVAN) is the most common cause of renal failure in HIV-1-seropositive patients. Recent studies using an HIV-1 transgenic mouse model have demonstrated that expression of HIV-1 in the kidney is required for the development of HIVAN. What has remained unclear, however, is the renal cell type responsible for pathogenesis and the essential pathological process. Methods: To address these issues, we used a transgenic murine model of HIVAN. We identified the cell types in kidney in which HIV transgene expression occurs using in situ hybridization. We evaluated evidence of proliferation by immunocytochemical analysis using an antibody to Ki-67 and cell type-specific markers, including WT-1, synaptopodin, Na+,K+-ATPase, adducin, and desmin. TUNEL assay was used to evaluate apoptosis. Results: We found that glomerular and tubular epithelial cells express the HIV-1 transgene early in the disease process when renal architecture is well preserved. Transgene expression is lost, however, in tubular epithelial cells when they lose their differentiated cuboidal phenotype. In glomerular epithelial cells, dedifferentiation occurs with reduced expression of WT-1 and synaptopodin, in association with activation of desmin expression. Tubular microcysts also form with mislocalization of Na+,K+-ATPase expression to the lateral and apical cellular membranes. Conclusions: These studies support the hypothesis that the glomerular and renal epithelial cells are the primary targets of HIV-1 pathogenesis in the kidney. The essential pathologic process is dysregulation of the epithelial cell cycle with increased proliferation, apoptosis, cellular dedifferentiation, and altered cellular polarity.
| Original language | English |
|---|---|
| Pages (from-to) | 173-181 |
| Number of pages | 9 |
| Journal | Kidney International |
| Volume | 58 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jul 15 2000 |
| Externally published | Yes |
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Keywords
- AIDS
- Chronic renal failure
- Glomerular cells
- Ki-67 cell type specific markers
- Kidney and HIV
- Podocytes
- Virus
ASJC Scopus subject areas
- Nephrology
Cite this
HIV-1 induces renal epithelial dedifferentiation in a transgenic model of HIV-associated nephropathy. / Barisoni-Thomas, Laura; Bruggeman, Leslie A.; Mundel, Peter; D'Agati, Vivette D.; Klotman, Paul E.
In: Kidney International, Vol. 58, No. 1, 15.07.2000, p. 173-181.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - HIV-1 induces renal epithelial dedifferentiation in a transgenic model of HIV-associated nephropathy
AU - Barisoni-Thomas, Laura
AU - Bruggeman, Leslie A.
AU - Mundel, Peter
AU - D'Agati, Vivette D.
AU - Klotman, Paul E.
PY - 2000/7/15
Y1 - 2000/7/15
N2 - Background: Human immunodeficiency virus-associated nephropathy (HIVAN) is the most common cause of renal failure in HIV-1-seropositive patients. Recent studies using an HIV-1 transgenic mouse model have demonstrated that expression of HIV-1 in the kidney is required for the development of HIVAN. What has remained unclear, however, is the renal cell type responsible for pathogenesis and the essential pathological process. Methods: To address these issues, we used a transgenic murine model of HIVAN. We identified the cell types in kidney in which HIV transgene expression occurs using in situ hybridization. We evaluated evidence of proliferation by immunocytochemical analysis using an antibody to Ki-67 and cell type-specific markers, including WT-1, synaptopodin, Na+,K+-ATPase, adducin, and desmin. TUNEL assay was used to evaluate apoptosis. Results: We found that glomerular and tubular epithelial cells express the HIV-1 transgene early in the disease process when renal architecture is well preserved. Transgene expression is lost, however, in tubular epithelial cells when they lose their differentiated cuboidal phenotype. In glomerular epithelial cells, dedifferentiation occurs with reduced expression of WT-1 and synaptopodin, in association with activation of desmin expression. Tubular microcysts also form with mislocalization of Na+,K+-ATPase expression to the lateral and apical cellular membranes. Conclusions: These studies support the hypothesis that the glomerular and renal epithelial cells are the primary targets of HIV-1 pathogenesis in the kidney. The essential pathologic process is dysregulation of the epithelial cell cycle with increased proliferation, apoptosis, cellular dedifferentiation, and altered cellular polarity.
AB - Background: Human immunodeficiency virus-associated nephropathy (HIVAN) is the most common cause of renal failure in HIV-1-seropositive patients. Recent studies using an HIV-1 transgenic mouse model have demonstrated that expression of HIV-1 in the kidney is required for the development of HIVAN. What has remained unclear, however, is the renal cell type responsible for pathogenesis and the essential pathological process. Methods: To address these issues, we used a transgenic murine model of HIVAN. We identified the cell types in kidney in which HIV transgene expression occurs using in situ hybridization. We evaluated evidence of proliferation by immunocytochemical analysis using an antibody to Ki-67 and cell type-specific markers, including WT-1, synaptopodin, Na+,K+-ATPase, adducin, and desmin. TUNEL assay was used to evaluate apoptosis. Results: We found that glomerular and tubular epithelial cells express the HIV-1 transgene early in the disease process when renal architecture is well preserved. Transgene expression is lost, however, in tubular epithelial cells when they lose their differentiated cuboidal phenotype. In glomerular epithelial cells, dedifferentiation occurs with reduced expression of WT-1 and synaptopodin, in association with activation of desmin expression. Tubular microcysts also form with mislocalization of Na+,K+-ATPase expression to the lateral and apical cellular membranes. Conclusions: These studies support the hypothesis that the glomerular and renal epithelial cells are the primary targets of HIV-1 pathogenesis in the kidney. The essential pathologic process is dysregulation of the epithelial cell cycle with increased proliferation, apoptosis, cellular dedifferentiation, and altered cellular polarity.
KW - AIDS
KW - Chronic renal failure
KW - Glomerular cells
KW - Ki-67 cell type specific markers
KW - Kidney and HIV
KW - Podocytes
KW - Virus
UR - http://www.scopus.com/inward/record.url?scp=0033947637&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033947637&partnerID=8YFLogxK
U2 - 10.1046/j.1523-1755.2000.00152.x
DO - 10.1046/j.1523-1755.2000.00152.x
M3 - Article
C2 - 10886562
AN - SCOPUS:0033947637
VL - 58
SP - 173
EP - 181
JO - Kidney International
JF - Kidney International
SN - 0085-2538
IS - 1
ER -