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[Searching for ways to correct thymic dysfunction in rats with experimental diabetes mellitus]
Fiziolohichnyi Zhurnal (Kiev, Ukraine : 1994)
|September 4, 2008
Summary
N-nitroL-arginine (NNLA) improved thymic function in diabetic rats more than L-arginine. NNLA increased regulatory T-cells (Treg-cells) and cell proliferation while decreasing iNOS(+) and Bcl-2(+) cells in experimental diabetes mellitus (EDM).
Area of Science:
- Immunology
- Endocrinology
- Cell Biology
Context:
- Experimental diabetes mellitus (EDM) significantly impacts immune organ function.
- Nitric oxide (NO) synthesis pathway modulation is a potential therapeutic target in diabetes.
Purpose:
- To investigate the effects of L-arginine and N-nitroL-arginine (NNLA) on the thymic morpho-functional status in rats with experimental diabetes mellitus (EDM).
- To evaluate the impact of NO precursor and NOS blocker on thymocyte proliferation, regulatory T-cells (Treg-cells), insulin expression, and apoptosis markers (Bcl-2) in EDM.
Summary:
- Immunohistochemical analysis revealed that NNLA administration had a more pronounced effect than L-arginine in rats with EDM.
- NNLA treatment increased the number of Treg-cells, insulin-expressing cells, and proliferating thymocytes.
- NNLA administration decreased the density of inducible nitric oxide synthase (iNOS)-positive and Bcl-2-positive cells in the thymus of diabetic rats.
Impact:
- These findings suggest that modulating the NO pathway, specifically with NOS blockers like NNLA, may offer a therapeutic strategy to restore thymic function in diabetes.
- Understanding these mechanisms can lead to novel approaches for managing immune dysregulation associated with metabolic disorders.
