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Pleotropic effects of dietary DHEA
L Milewich1, F Catalina, M Bennett
1Department of Obstetrics-Gynecology and Pathology, University of Texas, Southwestern Medical Center at Dallas 75235, USA.
Annals of the New York Academy of Sciences
|December 29, 1995
Summary
Dietary dehydroepiandrosterone (DHEA) impacts rodent metabolism, reducing weight gain and altering liver function. Key effects include changes in enzyme activity, lipid synthesis, and hormone levels.
Area of Science:
- Biochemistry
- Endocrinology
- Toxicology
Background:
- Dehydroepiandrosterone (DHEA) is an endogenous steroid hormone with various physiological roles.
- Understanding the in vivo effects of dietary DHEA is crucial for assessing its metabolic impact.
Purpose of the Study:
- To investigate the comprehensive in vivo effects of dietary dehydroepiandrosterone (DHEA) administration in rodent models.
- To characterize the biochemical and physiological alterations induced by DHEA exposure.
Main Methods:
- Administration of dietary DHEA to mice and rats.
- Analysis of body weight, organ weights (liver), and serum parameters (triglycerides, cholesterol, prolactin).
- Assessment of hepatic enzyme activities (peroxisomal, mitochondrial, malic enzyme, glutathione S-transferase, AMPase, GTPase) and synthesis rates (fatty acids, cholesterol).
Main Results:
- DHEA decreased body weight gain and altered liver characteristics, including weight and color.
- Significant changes in hepatic enzyme induction and activity were observed, alongside altered peroxisome and mitochondria morphology.
- Metabolic pathways were affected, with decreased fatty acid synthesis and increased cholesterol synthesis, alongside altered serum lipid profiles and reduced prolactin levels.
Conclusions:
- Dietary DHEA significantly impacts rodent physiology, affecting body weight, liver metabolism, and endocrine function.
- DHEA administration leads to a complex profile of biochemical changes, including altered enzyme activities and lipid metabolism.
- The formation of 5-androstene-3 beta,17 beta-diol is a key metabolite in DHEA's in vivo effects.