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Effect of chronic stress on cell division in the corneal and tongue epithelium


, : Effect of chronic stress on cell division in the corneal and tongue epithelium. Byulleten' Eksperimental'noi Biologii i Meditsiny 97(1): 93-94

Chronic stress was simulated by daily 1.5-h cooling of rats to 28-30.degree. C for 28 and 35 days. Stress development was marked by the decreased animals' weight, the reduction in the thymus weight, increase in the adrenal weight and lowered epinephrine content in the adrenals. Chronic stress resulted in a high level of pathological mitoses in the cornea. All series of experiments demonstrated DNA synthesis activation detectable by autoradiography. There were 3 variants of mitotic activity: the 1st one was characterized by scissors between high DNA synthesis and low mitotic activity, the 2nd one by high DNA synthesis attended by mitotic activity normalization, and the 3rd variant was marked by agreement between high DNA synthesis and high mitotic activity. A possible reason for the scissors between DNA synthesis and mitotic activity is discussed.

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