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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Genetic dissection of "OLETF", a rat model for non-insulin-dependent diabetes mellitus.

To elucidate the genetic factors underlying non-insulin-dependent diabetes mellitus ( NIDDM), we performed genome-wide quantitative trait locus (QTL) analysis, using the Otsuka Long-Evans Tokushima Fatty (OLETF) rat. The OLETF rat is an excellent animal model of NIDDM because the features of the disease closely resemble human NIDDM. Genetic dissection with two kinds of F2 intercross progeny, from matings between the OLETF rat and non-diabetic control rats F344 or BN, allowed us to identify on Chromosome (Chr) 1 a major QTL associated with features of NIDDM that was common to both crosses. We also mapped two additional significant loci, on Chrs 7 and 14, in the (OLETF x F344)F2 cross alone, and designated these three loci as Diabetes mellitus, OLETF type Dmo 1, Dmo2 and Dmo3 respectively. With regard to suggestive QTLs, we found loci on Chrs 10, 11, and 16 that were common to both crosses, as well as loci on Chrs 5 and 12 in the (OLETF x F344)F2 cross and on Chrs 4 and 13 in the (OLETF x BN)F2 cross. Our results showed that NIDDM in the OLETF rat is polygenic and demonstrated that different genetic backgrounds could affect "fitness" for QTLs and produce different phenotypic effects from the same locus.[1]


  1. Genetic dissection of "OLETF", a rat model for non-insulin-dependent diabetes mellitus. Kanemoto, N., Hishigaki, H., Miyakita, A., Oga, K., Okuno, S., Tsuji, A., Takagi, T., Takahashi, E., Nakamura, Y., Watanabe, T.K. Mamm. Genome (1998) [Pubmed]
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