We will search for the mechanism of action of the hormone, insulin, using isolated liver and adipose cells and enzymes extracted from such cells. We will search for the defect in protein synthesis that is characteristic of diabetes. The """"""""third mode"""""""" of action of insulin, inhibition of cyclic AMP-dependent protein kinase, will be studied to determine the mechanism by which insulin decreases the affinity of the kinase site 2 for cyclic nucleotides. The role of insulin in a new mechanism of regulating glycogen synthesis will be examined using isolated hepatocytes from diabetic rats to determine whether they can respond to the combination of glutamine, leucine, and dehydroxyacetone. This combination stimulates the conversion of glycogen synthase b to a in cells and will now be studied in cell-free enzyme preparations.

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Research Project (R01)
Project #
5R01DK020678-13
Application #
3226791
Study Section
Biochemistry Study Section (BIO)
Project Start
1977-09-01
Project End
1992-11-30
Budget Start
1990-12-01
Budget End
1992-11-30
Support Year
13
Fiscal Year
1991
Total Cost
Indirect Cost
Name
University of Wisconsin Madison
Department
Type
Other Domestic Higher Education
DUNS #
161202122
City
Madison
State
WI
Country
United States
Zip Code
53715