DAILY TORPOR IN THE ABSENCE OF THE SUPRACHIASMATIC NUCLEUS IN SIBERIAN HAMSTERS

被引:80
作者
RUBY, NF [1 ]
ZUCKER, I [1 ]
机构
[1] UNIV CALIF BERKELEY,DEPT PSYCHOL,BERKELEY,CA 94720
来源
AMERICAN JOURNAL OF PHYSIOLOGY | 1992年 / 263卷 / 02期
关键词
BODY TEMPERATURE; CIRCADIAN; ENTRAINMENT; FOOD RESTRICTION; RETINOHYPOTHALAMIC TRACT;
D O I
10.1152/ajpregu.1992.263.2.R353
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Siberian hamsters express torpor spontaneously after several weeks of exposure to short days. In long days, torpor is expressed only when food intake is restricted. Hamsters maintained in a long photoperiod (16 h light/day) at 15-degrees-C expressed daily torpor during food restriction both before and after bilateral ablation of the suprachiasmatic nucleus (SCN). Hamsters housed in short days (8 h light/day, ambient temperature 15-degrees-C) and fed ad libitum displayed torpor before, but not after, ablation of the SCN (SCNX). Torpor was reinstated in all short-day SCNX hamsters during postoperative food restriction and persisted in several animals even after ad libitum feeding was reinstated. Torpor was entrained to the light-dark cycle in both long- and short-day hamsters preoperatively but appeared to occur in a temporally random fashion in SCNX animals. SCNX hamsters, unlike control animals, displayed multiple torpor bouts per 24 h. The SCN is not essential for the expression of torpor but plays a crucial role in its temporal organization.
引用
收藏
页码:R353 / R362
页数:10
相关论文
共 33 条
[1]   ROLE OF THE SUPRACHIASMATIC NUCLEI IN THE CIRCADIAN TIMING SYSTEM OF THE SQUIRREL-MONKEY .2. LIGHT-DARK CYCLE ENTRAINMENT [J].
ALBERS, HE ;
LYDIC, R ;
MOOREEDE, MC .
BRAIN RESEARCH, 1984, 300 (02) :285-293
[2]  
BARTHOLOMEW G. A., 1957, JOUR MAMMOL, V38, P60, DOI 10.2307/1376476
[3]   SCN LESIONS BLOCK RESPONSES TO SYSTEMIC MELATONIN INFUSIONS IN SIBERIAN HAMSTERS [J].
BARTNESS, TJ ;
GOLDMAN, BD ;
BITTMAN, EL .
AMERICAN JOURNAL OF PHYSIOLOGY, 1991, 260 (01) :R102-R112
[4]   EFFECT OF SHORT-TERM STARVATION ON REPRODUCTIVE HORMONE GENE-EXPRESSION, SECRETION AND RECEPTOR LEVELS IN MALE-RATS [J].
BERGENDAHL, M ;
PERHEENTUPA, A ;
HUHTANIEMI, I .
JOURNAL OF ENDOCRINOLOGY, 1989, 121 (03) :409-417
[5]   INFLUENCES OF THE PARAVENTRICULAR AND SUPRACHIASMATIC NUCLEI AND OLFACTORY BULBS ON MELATONIN RESPONSES IN THE GOLDEN-HAMSTER [J].
BITTMAN, EL ;
CRANDELL, RG ;
LEHMAN, MN .
BIOLOGY OF REPRODUCTION, 1989, 40 (01) :118-126
[6]   SUPRACHIASMATIC AND PARAVENTRICULAR CONTROL OF PHOTOPERIODISM IN SIBERIAN HAMSTERS [J].
BITTMAN, EL ;
BARTNESS, TJ ;
GOLDMAN, BD ;
DEVRIES, GJ .
AMERICAN JOURNAL OF PHYSIOLOGY, 1991, 260 (01) :R90-R101
[7]   EFFECTS OF STARVATION IN RATS ON SERUM LEVELS OF FOLLICLE-STIMULATING HORMONE, LUTEINIZING-HORMONE, THYROTROPIN, GROWTH-HORMONE AND PROLACTIN - RESPONSE TO LH-RELEASING HORMONE AND THYROTROPIN-RELEASING-HORMONE [J].
CAMPBELL, GA ;
KURCZ, M ;
MARSHALL, S ;
MEITES, J .
ENDOCRINOLOGY, 1977, 100 (02) :580-587
[8]   PERSISTENT MEAL-ASSOCIATED RHYTHMS IN SCN-LESIONED RATS [J].
CLARKE, JD ;
COLEMAN, GJ .
PHYSIOLOGY & BEHAVIOR, 1986, 36 (01) :105-113
[9]   ROLE OF SHORT PHOTOPERIOD AND COLD-EXPOSURE IN REGULATING DAILY TORPOR IN DJUNGARIAN HAMSTERS [J].
ELLIOTT, JA ;
BARTNESS, TJ ;
GOLDMAN, BD .
JOURNAL OF COMPARATIVE PHYSIOLOGY A-SENSORY NEURAL AND BEHAVIORAL PHYSIOLOGY, 1987, 161 (02) :245-253
[10]  
Goldman B.D., 1986, P341