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[Interleukin-1 production by mononuclear leukocytes and mesangial cells in experimental nephrotoxic nephritis]
Insights
Nephrotoxic serum nephritis in rats shows increased mesangial cell proliferation and interleukin-1 (IL-1) production. This is linked to bone marrow-derived mononuclear leucocytes (MNL) infiltrating the glomerulus.
Area of Science:
- Nephrology
- Immunology
- Cell Biology
Background:
- Nephrotoxic serum (NTS) nephritis is an experimental model of glomerular disease.
- Understanding the cellular mechanisms driving nephritis progression is crucial.
Purpose of the Study:
- To investigate cell proliferation, mononuclear leucocyte (MNL) infiltration, and interleukin-1 (IL-1) production in rat glomerular cell cultures with NTS nephritis.
- To elucidate the relationship between these factors in the pathogenesis of NTS nephritis.
Main Methods:
- Rats were induced with NTS nephritis or served as controls.
- Glomeruli were isolated, collagenase-treated, and cultured for 20 days.
- Cell proliferation, MNL counts, and IL-1 production were assessed in cultures.
Main Results:
- Significantly higher mesangial cell proliferation in NTS nephritis cultures compared to controls.
- Increased numbers of mononuclear leucocytes (MNL) were observed in NTS nephritis glomeruli.
- Elevated production of interleukin-1 (IL-1) was detected in NTS nephritis cultures.
Conclusions:
- Intensive mesangial cell proliferation in experimental NTS nephritis is associated with MNL infiltration.
- Bone marrow-derived MNL contribute to nephritis by increasing IL-1 production.
- This study highlights the role of MNL and IL-1 in the pathogenesis of NTS nephritis.
Abstract:
We investigated the intensiveness of the cell proliferation, number of mononuclear leucocytes (MNL) and production of interleukin-1 (IL-1) in glomerular cell cultures of rats with nephrotoxic serum (NTS) nephritis and control (C) rats. Five days after intravenous injection of nephrotoxic serum from rabbits the glomeruli were isolated, treated with collagenase and cultured over a period of 20 days. In cultures the number and intensity of mesangial cell proliferation in the NTS group were significantly higher than in the C group. Thus, the intensive mesangial cell proliferation in experimental nephrotoxic serum nephritis is related to infiltration of glomerulus by MNL of bone marrow origin with increased production of IL-1.
