TY - JOUR
T1 - Interleukin-1 inhibits sexual behavior in female but not in male rats
AU - Yirmiya, Raz
AU - Avitsur, Ronit
AU - Donchin, Opher
AU - Cohen, Edna
PY - 1995/9
Y1 - 1995/9
N2 - The cytokine interleukin-1 (IL-1) is released by a variety of cells in response to infection or injury. Il-1 produces several neuroendocrine and behavioral effects, including a suppression of reproductive functions and goal-directed behaviors. The present study examined the effect of IL-1 on sexual behavior in male and female rats. The following behavioral tests were employed: preference for a sexually appropriate partner, preceptive (soliciting) behavior, the lordosis quotient (sexual receptivity), and mating performance. Peripheral tip) IL-1β, 2 or 10 μg/kg, injected 2 h before testing, significantly suppressed preceptive behavior and sexual receptivity in intact, normally cycling females. In ovariectomized rats treated with ovarian hormones, IL-1β (2 or to μg/kg) significantly decreased the preference for a sexually active male partner and suppressed preceptive behavior and sexual receptivity. These effects were evident 2, but not 4 or 6, h after IL-1β administration. Intracerebroventricular administration of IL-1β (10 ng/rat) also suppressed the preference for a male partner and preceptive behavior in normally cycling females. Similar doses of IL-1β had no suppressive effect on any aspect of male sexual behavior, and the highest dose even increased the preference for a receptive female partner. In contrast to the gender-specific effects on sexual behavior, the suppressive effects of IL-1β on activity in the open-field rest were comparable in male and female rats. The inhibition of female sexual behavior by IL-1 may be adaptive, in that it prevents conception while the animal is sick, thus reducing the risk of spontaneous abortion or abnormal development.
AB - The cytokine interleukin-1 (IL-1) is released by a variety of cells in response to infection or injury. Il-1 produces several neuroendocrine and behavioral effects, including a suppression of reproductive functions and goal-directed behaviors. The present study examined the effect of IL-1 on sexual behavior in male and female rats. The following behavioral tests were employed: preference for a sexually appropriate partner, preceptive (soliciting) behavior, the lordosis quotient (sexual receptivity), and mating performance. Peripheral tip) IL-1β, 2 or 10 μg/kg, injected 2 h before testing, significantly suppressed preceptive behavior and sexual receptivity in intact, normally cycling females. In ovariectomized rats treated with ovarian hormones, IL-1β (2 or to μg/kg) significantly decreased the preference for a sexually active male partner and suppressed preceptive behavior and sexual receptivity. These effects were evident 2, but not 4 or 6, h after IL-1β administration. Intracerebroventricular administration of IL-1β (10 ng/rat) also suppressed the preference for a male partner and preceptive behavior in normally cycling females. Similar doses of IL-1β had no suppressive effect on any aspect of male sexual behavior, and the highest dose even increased the preference for a receptive female partner. In contrast to the gender-specific effects on sexual behavior, the suppressive effects of IL-1β on activity in the open-field rest were comparable in male and female rats. The inhibition of female sexual behavior by IL-1 may be adaptive, in that it prevents conception while the animal is sick, thus reducing the risk of spontaneous abortion or abnormal development.
UR - http://www.scopus.com/inward/record.url?scp=0028808294&partnerID=8YFLogxK
U2 - 10.1006/brbi.1995.1021
DO - 10.1006/brbi.1995.1021
M3 - Article
AN - SCOPUS:0028808294
SN - 0889-1591
VL - 9
SP - 220
EP - 233
JO - Brain, Behavior, and Immunity
JF - Brain, Behavior, and Immunity
IS - 3
ER -