Abstract
Changes of the mitotic index in the esophageal epithelium were studied every 20 min for 24 hours in control mice and in mice kept under conditions of an inverted light regime for 10 days. A monophasic circadian rhythm was revealed, which was virtually completely resynchronized to the new light regime after 10 days of photoinversion. Circahoralian fluctuations of the mitotic index with 1–2-hour periods were noted. In controls the period of these fluctuations was shorter in the active phase of the circadian rhythm than during the passive phase. After photoinversion this regularity was no longer observed. Hence, in contrast to the circadian rhythm, the hierarchical structure of the temporal organization of the mitotic index rhythm of the esophageal epithelium in different periods was not restructured during the 10 days of the new light/dark regime.
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Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 121, No 1, pp. 94–97, January, 1996
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Romanov, Y.A., Irikov, O.A., Filippovich, S.S. et al. Effect of an inverted light regime on the biological rhythms of the mitotic index of mouse esophageal epithelium in different periods. Bull Exp Biol Med 121, 86–89 (1996). https://doi.org/10.1007/BF02445715
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DOI: https://doi.org/10.1007/BF02445715