Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1937475 | Biochemical and Biophysical Research Communications | 2007 | 5 Pages |
Abstract
We have previously produced transgenic G-InsKi mice, a model allowing regulated portal insulin delivery from gastric G cells without using β cells. Here, we report that in G-InsKi mice portal levels of transgenic human insulin are 6-fold higher than in peripheral circulation. Peptone-induced release of transgenic human insulin from G cells preferentially stimulated signaling cascades in the liver rather than in peripheral insulin-sensitive tissues, as judged by tyrosine phosphorylation of insulin receptor β subunit and phosphorylation of protein kinase Akt/PKB at Thr-308. G-InsKi mice provide a novel animal model for elucidating direct effects of insulin on liver functions.
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Authors
Yu-Chun Lu, Enrique Rozengurt, Elena Zhukova,