Gc. Kostervanhoffen et al., EFFECTS OF A NOVEL MELATONIN ANALOG ON CIRCADIAN-RHYTHMS OF BODY-TEMPERATURE AND ACTIVITY IN YOUNG, MIDDLE-AGED, AND OLD RATS, Neurobiology of aging, 14(6), 1993, pp. 565-569
Circadian rhythms of body temperature and activity were recorded in yo
ung, middle-aged, and old rats. A new melatonin analog, S20242, was ad
ministered daily around the onset of darkness for a 2-week period. Com
pared to the young animals, there was a significant age-related reduct
ion in the amplitude and stability of body temperature and activity in
both the middle-aged and old rats. In these two groups there was an i
mprovement of the circadian rhythm of body temperature as a result of
daily application of the melatonin analog.