MOLECULAR MAPPING OF NIDDM LOCI IN RODENTS AND HUMANS

Project: Research project

Project Details

Description

Type II or non-insulin dependent diabetes mellitus (NIDDM) is estimated to
affect 5% of the world's population. Considering the additional 10-11% of
the adult population with impaired glucose tolerance (which imposes a
greater than 6-fold increased risk of developing NIDDM), 8-10% of adults
either have, or will develop, NIDDM. Approximately 20% of the members of
the US population over 65 years of age are diabetic.

The medical consequences of this disorder are staggering. The complication
rates in NIDDM patients are equivalent (per year of disease) to the much
smaller number of individuals with type I, insulin-dependent diabetes.
Diabetes is the leading cause of blindness, end stage renal disease and
amputations in the US, and contributes significantly to the high
prevalence of dyslipidemias and hypertension. The enormous physical and
psychological burdens imposed by this disease are only partly reflected in
the estimated $25 billion dollars spent annually on its treatment in the
US alone.

There is a strong genetic predisposition to NIDDM, the expression of which
is facilitated by the presence of obesity. Over 60% of individuals with
NIDDM are obese. The mechanisms by which obesity predisposes to NIDDM is
not known, but it is likely that obesity stresses the pancreatic beta
cells by diminishing the action of insulin on glucose metabolism. The goal
of this proposal is to identify the genes which, in the presence of
obesity, predispose to the development of NIDDM.

The complexity of the genetics of NIDDM in humans favors the initial use
of simpler animals models to identify candidate genes for NIDDM-
susceptibility and resistance. Using well characterized mouse and rat
genetic models of obesity-diabetes, such genes will be identified. These
genes will be then be examined by genetic linkage techniques in human
families in which NIDDM is present. Ultimately, knowledge of the
structure/action of such genes can be used to prevent or treat NIDDM.
StatusFinished
Effective start/end date9/30/938/31/94

Funding

  • National Institute of Diabetes and Digestive and Kidney Diseases

ASJC

  • Genetics
  • Endocrinology, Diabetes and Metabolism

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