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Immune modulation with interleukin-4 and interleukin-10 prevents crescent formation and glomerular injury in
P G Tipping1, A R Kitching, X R Huang
1Centre for Inflammatory Diseases, Monash University Department of Medicine, Clayton, Australia.
Insights
This study shows that T helper 2 (Th2) cytokines, specifically interleukin-4 (IL-4) and interleukin-10 (IL-10), can prevent crescentic glomerulonephritis (GN) and kidney damage. Administration of these cytokines reduced inflammation and protected kidney function in a mouse model.
Area of Science:
- Immunology
- Nephrology
- Cytokine Therapy
Background:
- Crescentic glomerulonephritis (GN) is characterized by a T helper (Th)1-driven delayed-type hypersensitivity (DTH) immune response.
- Understanding the role of Th2 cytokines in mitigating GN is crucial for developing targeted therapies.
Purpose of the Study:
- To investigate the therapeutic potential of interleukin-4 (IL-4) and interleukin-10 (IL-10), key Th2 cytokines, in preventing crescentic GN.
- To determine if Th2 cytokine administration can attenuate glomerular injury and renal impairment associated with GN.
Main Methods:
- A mouse model of GN was established using sheep anti-mouse glomerular basement membrane (GBM) globulin.
- Mice were treated with IL-4, IL-10, or a combination of both (IL-4 + 10) starting before disease induction and continuing daily.
- Key indicators of kidney injury, including crescent formation, proteinuria, renal function (creatinine clearance), and immune cell infiltration, were assessed.
Main Results:
- IL-4, IL-10, and IL-4 + 10 treatments significantly prevented crescent formation and reduced proteinuria compared to controls.
- Combined IL-4 + 10 treatment effectively preserved renal function, while IL-10 alone partially limited the decline.
- All treatments reduced T cell and macrophage accumulation in glomeruli and suppressed Th1-associated immune responses, including interferon-gamma production and DTH reactions.
Conclusions:
- Administration of Th2 cytokines (IL-4 and IL-10) is a viable strategy for preventing crescentic GN and associated renal impairment.
- The protective effects of Th2 cytokines are linked to the attenuation of Th1-mediated immune responses and reduced inflammation in the glomeruli.
Abstract:
Crescentic glomerulonephritis (GN) demonstrates immunopathological features of a T helper (Th)1-directed delayed-type hypersensitivity (DTH) response. The capacity of Th2 cytokines to attenuate crescentic glomerular injury in this disease was examined by administering interleukin (IL)-4 and IL-10, singly and in combination. GN was induced by i.v. administration of sheep anti-mouse glomerular basement membrane (GBM) globulin to mice sensitized to sheep globulin 10 days earlier. Treatment (2.5 microg, i.p.) with IL-4, IL-10, or both IL-4 and IL-10 (IL-4 + 10), was started 1 h before sensitization and continued daily until the end of the study (10 days after administration of anti-GBM globulin). Control mice treated with PBS developed GN with glomerular accumulation of T cells and macrophages, crescents in 42.5 +/- 4.5 % of glomeruli (normal 0 %), proteinuria (8.3 +/- 0.9 mg/24 h, normal 0.74 +/- 0.08 mg/24 h, p <0.001) and renal impairment (creatinine clearance [cr/cl]: 93 +/- 12 microl/min, normal 193 +/- 10 microl/min, p < 0.001). Treatment with either IL-4, IL-10, or IL-4 + 10 prevented crescent formation (crescentic glomeruli: 0.8 +/- 0.5, 1.2 +/- 0.9, and 1.4 +/- 1.0 %, respectively, all p < 0.01 compared to control) and attenuated proteinuria (3.6 +/- 1.0, 2.2 +/- 0.5, and 2.9 +/- 0.5 mg/24 h, respectively, all p < 0.01 compared to control). IL-4 + 10 prevented development of renal impairment (cr/cl: 183 +/- 22 microl/min); IL-10 given alone limited the decline in renal function (cr/cl: 150 +/- 20 microl/min), but IL-4 alone did not provide any significant protection (cr/cl: 121 +/- 17 microl/min). All treatments markedly diminished glomerular T cell and macrophage accumulation, reduced interferon-gamma production by splenic T cells, prevented cutaneous DTH to the disease-initiating antigen and reduced antigen-specific immunoglobulin of the IgG2a and IgG3 isotypes. These data demonstrate that crescentic GN and renal impairment can be prevented by administration of Th2 cytokines and that this effect is associated with attenuation of the Th1 response to the disease-initiating antigen.