Dynamics of gene C-Fos activity in paraventricular nuclei of the hypothalamus of rats at light stress

Abstract

Stress influence (light deprivation and stimulation) on gene c-fos state of early functional activity in subnuclei of paraventricular nucleus (PVN) of hypothalamus of rats in various periods of twenty-four hours (day and night) has been elucidated. Product expression of this gene - c-Fos protein - in animals which were hold under normal conditions of light and darkness alternations showed rather distinct circadian character. Simultaneously, change of duration of the light-darkness cycle results in evident desynchronization.