Idd-linked genetic regulation of TACIhigh expressing B cells in NOD mice
2007 (English)In: Journal of Autoimmunity, ISSN 0896-8411, E-ISSN 1095-9157, Vol. 29, no 2-3, 116-124 p.Article in journal (Refereed) Published
In NOD mice, B cells play a key role in the initiation of type 1 diabetes pathogenesis. We have identified a novel NOD-specific B cell-related trait, i.e. the increased percentage of TACI(high)-expressing splenic B cells, by comparing NOD mice with non-autoimmune C57BL/6 mice. Using athymic NOD mice, we determined that this trait was T cell independent. We mapped the loci contributing to the increased proportion of TACI(high) expressing splenic B cells and found that the control of TACI expression was strongly linked to chromosome 1, in a region which includes the insulin-dependent diabetes (Idd) 5 loci. Moreover, another locus potentially involved was detected in the vicinity of Idd22 on chromosome 8. Interestingly, when analyzing age-dependent contribution to the obtained LOD scores we observed that the linkage to chromosome 8 was explained solely by mice > or =61 days of age, suggesting a temporal genetic regulation of TACI expression. In addition, analysis of genetic interaction between chromosome 1 and chromosome 8 indicated that the two loci acted in an additive fashion. Our findings corroborate the notion that B cell deviations contribute to type 1 diabetes development, and suggest a temporal regulation of TACI(high) expression, possibly influenced by the ongoing autoimmune process.
Place, publisher, year, edition, pages
2007. Vol. 29, no 2-3, 116-124 p.
B cell; Genetics; NOD mouse; Temporal genetic regulation; TACI
Immunology in the medical area
IdentifiersURN: urn:nbn:se:umu:diva-21138DOI: 10.1016/j.jaut.2007.05.005PubMedID: 17656068OAI: oai:DiVA.org:umu-21138DiVA: diva2:210806