NDLI: Diabetic modifier QTLs in F2 intercrosses carrying homozygous transgene of TGF-β

Content Provider	Springer Nature Link
Author	Suzuki, Takao Moritani, Maki Yoshi, Masayasu Kagami, Mitsuhiro Iwasaki, Shoji Nishimura, Kouichi Akamatsu, Masahiko Kobori, Masato Matsushime, Hitoshi Kotoh, Masao Furuichi, Kiyoshi Itakura, Mitsuo
Copyright Year	2007
Abstract	When the homozygous active form of porcine TGF-β1 transgene (Tgf/Tgf) (under control of the rat glucagon promoter) is introduced into the nonobese diabetic mouse (NOD) genetic background, the mice develop endocrine and exocrine pancreatic hypoplasia, low serum insulin concentrations, and impaired glucose tolerance. To identify genetic modifiers of the diabetic phenotypes, we crossed hemizygous NOD-Tgf with DBA/2J mice (D2) or C3H/HeJ mice (C3H) and used the “transgenic mice” for quantitative trait loci (QTL) analysis. Genome-wide scans of F2-D Tgf/Tgf (D2 × NOD) and F2-C Tgf/Tgf (C3H × NOD), homozygous for the TGF-β1 transgene, identified six statistically significant modifier QTLs: one QTL (Tdn1) in F2-D Tgf/Tgf, and five QTLs (Tcn1 to Tcn5) in F2-C Tgf/Tgf. Tdn1 (Chr 13, LOD = 4.39), and Tcn3 (Chr 2, LOD = 4.94) showed linkage to body weight at 8 weeks of age. Tcn2 (Chr 7, LOD = 4.38) and Tcn4 (Chr 14, LOD = 3.99 and 3.78) showed linkage to blood glucose (BG) concentrations in ipGTT at 30, 0, and 120 min, respectively. Tcn1 (Chr 1, LOD = 4.41) and Tcn5 (Chr 18, LOD = 4.99) showed linkage to serum insulin concentrations in ipGTT at 30 min. Tcn2 includes the candidate gene, uncoupling protein 2 (Ucp2), and shows linkage to Ucp2 mRNA levels in the soleus muscle (LOD = 4.90). Identification of six QTLs for diabetes-related traits in F2-D Tgf/Tgf and F2-C Tgf/Tgf raises the possibility of identifying candidate susceptibility genes and new targets for drug development for human type 2 diabetes.
Starting Page	15
Ending Page	25
Page Count	11
File Format	PDF
ISSN	09388990
Journal	Mammalian Genome
Volume Number	19
Issue Number	1
e-ISSN	14321777
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-12-27
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Zoology Anatomy Cell Biology
Content Type	Text
Resource Type	Article
Subject	Genetics

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