Diabetologia · 2001
The LEW.1AR1/Ztm-iddm rat: a new model of spontaneous insulin-dependent diabetes mellitus.
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Lenzen S, Tiedge M, Elsner M, Lortz S, Weiss H, Jörns A, Klöppel G, Wedekind D, Prokop C M, Hedrich H J
Аннотация
AIMS/HYPOTHESIS: We describe a new Type I (insulin-dependent) diabetes mellitus rat model (LEW.1AR1/Ztm-iddm) which arose through a spontaneous mutation in a congenic Lewis rat strain with a defined MHC haplotype (RT1.Aa B/Du Cu).
METHODS: The development of diabetes was characterised using biochemical, immunological and morphological methods.
RESULTS: Diabetes appeared in the rats with an incidence of 20 % without major sex preference at 58+/-2 days. The disease was characterised by hyperglycaemia, glycosuria, ketonuria and polyuria. In peripheral blood, the proportion of T lymphocytes was in the normal range expressing the RT6.1 differentiation antigen. Islets were heavily infiltrated with B and T lymphocytes, macrophages and NK cells with beta cells rapidly destroyed through apoptosis in areas of insulitis.
CONCLUSION/INTERPRETATION: This Type I diabetic rat develops a spontaneous insulin-dependent autoimmune diabetes through beta cell apoptosis. It could prove to be a valuable new animal model for clarifying the mechanisms involved in the development of autoimmune diabetes.
METHODS: The development of diabetes was characterised using biochemical, immunological and morphological methods.
RESULTS: Diabetes appeared in the rats with an incidence of 20 % without major sex preference at 58+/-2 days. The disease was characterised by hyperglycaemia, glycosuria, ketonuria and polyuria. In peripheral blood, the proportion of T lymphocytes was in the normal range expressing the RT6.1 differentiation antigen. Islets were heavily infiltrated with B and T lymphocytes, macrophages and NK cells with beta cells rapidly destroyed through apoptosis in areas of insulitis.
CONCLUSION/INTERPRETATION: This Type I diabetic rat develops a spontaneous insulin-dependent autoimmune diabetes through beta cell apoptosis. It could prove to be a valuable new animal model for clarifying the mechanisms involved in the development of autoimmune diabetes.