The physiological and behavioral effects of subchronic intracisternal administration of TGF-beta in rats: comparison with the effects of CRF.
We studied the physiological and behavioral effects of subchronic intracisternal administration of transforming growth factor-beta (TGF-beta) for 7 days. Subchronic intracisternal administration of TGF-beta significantly inhibited the increase in body weight of rats but did not affect food intake. In the measurement of locomotor activity after the final intracisternal administration on day 7, the total count for 1.5 h increased significantly in the TGF-beta group compared with the vehicle group. However, that for 10 h was not different between both groups. Furthermore, significant elevations in oxygen consumption were observed in the TGF-beta group during both light and dark phase. Subchronic TGF-beta treatment induced a significant decrease in the number of total leukocytes and lymphocytes and the relative weight of the thymus, and a significant increase in brown adipose tissue weight. Corticotropin-releasing factor (CRF) is the primary neuroendocrine factor released in response to stress. Subchronic treatment with CRF, as a positive control, significantly affected body weight, food intake, oxygen consumption, total leukocyte and lymphocyte counts, and thymus and adrenal weight. Subchronic TGF-beta administration partially mimicked the stress responses, implicating a role for TGF-beta in the brain in stress.
Shibakusa
Tetsuro
T
Laboratory of Nutrition Chemistry, Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Japan.
Iwaki
Yoko
Y
Mizunoya
Wataru
W
Matsumura
Shigenobu
S
Nishizawa
Yuko
Y
Inoue
Kazuo
K
Fushiki
Tohru
T
D000221:Adaptation, Ocular; D002001:Adipose Tissue, Brown / Q000187:drug effects; D000818:Animals; D001835:Body Weight / Q000187:drug effects; D002946:Cisterna Magna; D003346:Corticotropin-Releasing Hormone / Q000008:administration & dosage / Q000494:pharmacology / Q000502:physiology*; D004435:Eating / Q000187:drug effects; D007958:Leukocyte Count; D018655:Lymphocyte Count; D008297:Male; D009043:Motor Activity / Q000187:drug effects; D009929:Organ Size / Q000187:drug effects; D010101:Oxygen Consumption / Q000187:drug effects; D051381:Rats; D017207:Rats, Sprague-Dawley; D013950:Thymus Gland / Q000033:anatomy & histology / Q000187:drug effects; D016212:Transforming Growth Factor beta / Q000008:administration & dosage / Q000494:pharmacology / Q000502:physiology*
D016212:Transforming Growth Factor beta; D003346:Corticotropin-Releasing Hormone