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Uptake of /sup 125/I-iododeoxyuridine in mouse organs during deuteration of body water: evidence for a thymus-specific effect

Journal Article · · Life Sci.; (United States)
The effects of body water deuteration on mammalian DNA synthesis in vivo during the deuterium equilibration period in the body were studied. Young adult mice were given 15 percent or 30 percent D/sub 2/O in the drinking water for 4, 10 or 21 days. Control mice were given distilled water. Eighteen hours prior to sacrifice, /sup 125/IUdR, a conveniently monitored synthetic analogue of the DNA precursor thymidine, was injected intravenously. Although neither radioiodine activity of the total body nor body weight varied significantly among the three groups, thymic radioactivity per g tissue was significantly lower in mice given 30 percent D/sub 2/O and, to a lesser extent, in mice given 15 percent D/sub 2/O than in the control group. In contrast, intestine and hemopoietic bone marrow displayed minor changes in /sup 125/IUdR incorporation. This reduction of /sup 125/IUdR incorporation is discussed in relation to the particular importance of thymidine reutilization in the thymus.
Research Organization:
Brookhaven National Lab., Upton, NY
OSTI ID:
7331990
Journal Information:
Life Sci.; (United States), Journal Name: Life Sci.; (United States) Vol. 19; ISSN LIFSA
Country of Publication:
United States
Language:
English

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