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We engineered a CSAD KO mouse to investigate the physiological roles of taurine. The disruption of the CSAD gene was verified by Southern, Northern, and Western blotting. HPLC indicated an 83% decrease of taurine concentration in the plasma of CSAD(-/-). Although CSAD(-/-) generation (G)1 and G2 survived, offspring from G2 CSAD(-/-) had low brain and liver taurine concentrations and most died within 24 hrs of birth. Taurine concentrations in G3 CSAD(-/-) born from G2 CSAD(-/-) treated with taurine in the drinking water were restored and survival rates of G3 CSAD(-/-) increased from 15% to 92%. The mRNA expression of CDO, ADO, and TauT was not different in CSAD(-/-) compared to WT and CSAD mRNA was not expressed in CSAD(-/-). Expression of Gpx 1 and 3 was increased significantly in CSAD(-/-) and restored to normal levels with taurine supplementation. Lactoferrin and the prolactin receptor were significantly decreased in CSAD(-/-). The prolactin receptor was restored with taurine supplementation. These data indicated that CSAD KO is a good model for studying the effects of taurine deficiency and its treatment with taurine supplementation.
Pubmed ID: 24639894
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Mus musculus with name C57BL/6J from IMSR.
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