Human amino acid metabolism during combined short-term exposure to head-down tilt hypokinesia and ultraviolet irradiation
Ushakov, A.S.; Vlasova, T.F.; Miroshnikova, E.B.; Panferova, N.E.; Murugova, T.P.
Kosmicheskaia Biologiia i Aviakosmicheskaia Meditsina 19(2): 46-49
1985
ISSN/ISBN: 0321-5040 PMID: 3990233 Document Number: 246367
Changes in the amino acid pool in the plasma of test subjects exposed to short-term head-down tilt combined with ultraviolet irradiation were investigated. Exposure to head-down tilt alone (Group 1 of 3 test subjects) and combined with ultraviolet irradiation (10 sessions) (Groups 2 and 3 of 3 test subjects each) acted as a stress-agent that diminished the amino acid pool. Exposure to 2-hour head-down tilt in combination with 20 UV-irradiations (Groups 2 and 3) increased the amino acid pool as a result of inhibition of anabolic and stimulation of catabolic processes. The amino acid pool did not return to normal within the recovery period allowed.