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KMID : 0378019700130100119
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New Medical Journal
1970 Volume.13 No. 10 p.119 ~ p.132
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Radioautographic Studies on Cell Renewal System of Adrenal Corer of Albino Mouse in Different Ages
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Abstract
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The effects of successive increase of postnatal ages on the adrenal cortex from the normal albino mouse have been investigated by means of the microradioautographic technique after the intraperitoneal administration of single dose of 0.8 microcurie/mg of body weight of tritiated thymidine.
Sixty-eight mice(of which 29 were male and the rest of them were 39 of female) were put into six age groups. The age range was from 4-day old suckling to the age more than 50-week old of mature adult.
Each of the mice was sacrificed at 120 minutes after the administration of the radioactive i s6lope, and the stripping film method was adopted after the histological preparation of three micra section from the adrenal gland tissue. The microslides were stained with Ehrlich´s acid haematoxylin after 28 days exposure in room temperature.
1. Regardless the sex,. high cell renewal frequencies from the suckling young age groups except the 3 week old group were contrasted with those of the adult groups of low.
2. Of the suckling young, successive increase of the postnatal age was induced decrease of the cell renewal frequencies of the fascicular zone. This fact was reversed in their glomerular zone.
3. Of the adult male, decrease of the cell renewal rates of the glomerular zone with increase of the postnatal age were accompanied by concommitant increase of those in their reticular zone.
4. It appears to be that the adrenocortical cell renewal frequencies were modified by the sex hormones through both the ovarian cyclic change and related postnatal ages.
5. The lowest cell renewal rate in the 3-week old group suggests further detection is needed.
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KEYWORD
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