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Intercellular adhesion molecule 1 mediates mononuclear cell infiltration into rat glomeruli after renal ablation
N Miyatake1, K Shikata, H Sugimoto
1Department of Medicine III, Okayama University Medical School, Japan.
Nephron
|June 3, 1998
Summary
Glomerular hyperfiltration increases Intercellular Adhesion Molecule 1 (ICAM-1) expression, leading to more macrophages infiltrating the glomeruli. Blocking ICAM-1 with antibodies reduced this infiltration, suggesting a key role in kidney disease progression.
Area of Science:
- Nephrology
- Immunology
- Pathophysiology
Background:
- Mononuclear cells, including macrophages and lymphocytes, drive glomerular diseases.
- Intercellular Adhesion Molecule 1 (ICAM-1) mediates leukocyte infiltration during inflammation.
- Glomerular hyperfiltration is a key factor in the progression of glomerulosclerosis.
Purpose of the Study:
- To investigate the role of ICAM-1 in mononuclear cell infiltration in a rat model of glomerular hyperfiltration.
- To determine if glomerular hyperfiltration induces ICAM-1 expression and subsequent leukocyte infiltration.
Main Methods:
- Utilized a five-sixth nephrectomized rat model to induce glomerular hyperfiltration.
- Quantified ICAM-1 expression and leukocyte infiltration in glomeruli using fluorescence intensity and cell counts.
- Administered anti-ICAM-1 monoclonal antibody to assess its effect on macrophage infiltration.
Main Results:
- Significantly increased ICAM-1 expression and leukocyte infiltration were observed in nephrectomized rats compared to controls at 1 and 2 weeks.
- Macrophages constituted the majority of infiltrating leukocytes.
- Anti-ICAM-1 antibody treatment effectively inhibited macrophage infiltration into the glomeruli.
Conclusions:
- Glomerular hyperfiltration appears to induce ICAM-1 expression in the glomeruli.
- ICAM-1 plays a critical role in mediating macrophage infiltration following glomerular injury.
- Targeting ICAM-1 may offer a therapeutic strategy for glomerular diseases.
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