Aging, stress, and chronic disease interact to suppress plasma testosterone in Syrian hamsters.

Abstract

The effects of old age, chronic disease, and stress on testicular function were examined in Syrian hamsters living on a 12-hr photoperiod. Plasma testosterone concentrations and testes weights were maintained in healthy hamsters 16-19 months of age, but chronic stress decreased plasma testosterone in these old hamsters and not in younger ones (8-11 months… (More)

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