BASAL HEPATIC GLUCOSE AND INSULIN SENSITIVITY IN BABOONS

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This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. The purpose of this study was to conduct assessments of glucose metabolism by performing the euglycemic-hyperinsulinemic clamp procedure in baboons in order to compare the difference in glucose clearance between obese, lean, and diabetic animals. The euglycemic- hyperinsulinemic clamp procedure is considered the "Gold Standard" technique to measure insulin sensitivity, and is routinely performed in human subjects, and will allow us to evaluate insulin sensitivity in these animals. During the euglycemic-hyperinsulinemic clamp procedure circulating glucose is held constant by infusion of exogenous glucose in response to rising insulin levels. As part of this project we have also collected muscle, fat and liver biopsies while under insulin administration to examine tissue-specific differences in glucose utilization, insulin signaling, and gene expression patterns. Our major objective is to validate this protocol for long term studies in molecular genetics of the insulin-glucose axis.