Localization of Idd11 is not associated with thymus and nkt cell abnormalities in NOD mice.
Congenic mouse strains provide a unique resource for genetic dissection and biological characterization of chromosomal regions associated with diabetes progression in the nonobese diabetic (NOD) mouse. Idd11, a mouse diabetes susceptibility locus, was previously localized to a region on chromosome 4. Comparison of a panel of subcongenic NOD mouse strains with different intervals derived from the nondiabetic C57BL/6 (B6) strain now maps Idd11 to an approximately 8-Mb interval. B6-derived intervals protected congenic NOD mice from diabetes onset, even though lymphocytic infiltration of pancreatic islets was similar to that found in NOD mice. In addition, neither thymic structural irregularities nor NKT cell deficiencies were ameliorated in diabetes-resistant congenic NOD mice, indicating that Idd11 does not contribute to these abnormalities, which do not need to be corrected to prevent disease.
Brodnicki
Thomas C
TC
Genetics and Bioinformatics Division, The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3050 Australia. brodnicki@wehi.edu.au
Fletcher
Anne L
AL
Pellicci
Daniel G
DG
Berzins
Stuart P
SP
McClive
Peter
P
Quirk
Fiona
F
Webster
Kylie E
KE
Scott
Hamish S
HS
Boyd
Richard L
RL
Godfrey
Dale I
DI
Morahan
Grant
G
D000818:Animals; D002874:Chromosome Mapping; D003922:Diabetes Mellitus, Type 1 / Q000235:genetics*; D020022:Genetic Predisposition to Disease; D051379:Mice; D008810:Mice, Inbred C57BL; D016688:Mice, Inbred NOD; D013950:Thymus Gland / Q000473:pathology*