Faculty Research 1990 - 1999

Use of recombinant congenic and congenic strains of NOD mice to identify a new insulin-dependent diabetes resistance gene.

Document Type

Article

Publication Date

1994

Keywords

Animal, Base-Sequence, Chromosome-Mapping, Diabetes-Mellitus-Insulin-Dependent: ge, Female, Human, Male, Mice, Mice-Inbred-NOD: ge, Molecular-Sequence-Data, Recombination-Genetic, SUPPORT-NON-U-S-GOVT, SUPPORT-U-S-GOVT-P-H-S

First Page

1553

Last Page

1558

JAX Source

J Exp Med 1994 Oct 1;180(4):1553-8

Grant

DK36175/DK/NIDDK, DK27722/DK/NIDDK, DK46266/DK/NIDDK

Abstract

Insulin-dependent diabetes mellitus (IDDM) in NOD/Lt mice represents a complex polygenic disease. NOR/Lt is a recombinant congenic strain (RCS) in which limited regions of the NOD/Lt genome have been replaced by genome from the C57BL/KsJ strain. NOR mice are insulitis resistant and diabetes free despite genetic identity with NOD at numerous chromosomal regions containing previously described insulin-dependent diabetes (Idd) genes, including the strongly diabetogenic H2g7 major histocompatibility complex (MHC) haplotype. The present study revealed BKs-derived genome on segments of chromosomes (Chr) 1, 2, 4, 5, 7, 11, 12, and 18, approximating 11.6% of the total NOR genome analyzed. (NOD x NOR)F2 segregation analysis was employed to identify chromosomal regions in NOR containing Idd resistance alleles. IDDM developed in 33% (10/30) of F1 females, and 29.3% (36/123) of F2 females aged to 1 yr. A previously unrecognized diabetes resistance locus (designated Idd13r) strongly protective in homozygous state was identified on NOR Chr 2 in linkage with the Il1 alpha structural gene. The existence of this locus was confirmed by construction of a NOD stock congenic for NOR-derived markers on Chr 2. Our analysis shows the utility of RCS and congenic stocks for the identification and isolation of non-MHC genes with strong antidiabetogenic functions.

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