scholarly journals Corrigendum to “Endocannabinoids mediate long-lasting behavioural and physiological changes in male rats induced by the repeated activation of the mesolimbic system by copulation to satiety” [Behav. Brain Res. 383 (2020) 112510]

2020 ◽  
Vol 385 ◽  
pp. 112572
Author(s):  
Estefanía González-Morales ◽  
Gabriela Rodríguez-Manzo
Keyword(s):  
Male Rats ◽  
Physiological Changes ◽  
Mesolimbic System

Acclimation of rats following stepwise or direct exposure to heat

1985 ◽  
Vol 59 (2) ◽  
pp. 408-412 ◽  
Author(s):  
A. R. Gwosdow ◽  
E. L. Besch ◽  
C. L. Chen
Keyword(s):  
Water Intake ◽  
Elevated Temperatures ◽  
Plasma Corticosterone ◽  
Male Rats ◽  
Controlled Environment ◽  
Physiological Changes ◽  
Evaporative Water ◽  
Initial Exposure ◽  
Direct Exposure ◽  
Food And Water Intake

The physiological changes in male rats during acclimation were studied following direct or stepwise exposure to heat (32.5 degrees C) in a controlled-environment room. The animals were exposed to each temperature for 10 days beginning at 24.5 degrees C and returning to 24.5 degrees C in the reverse order of initial exposure. Relative humidity of 50 +/- 2% and a 12-h light-dark photoperiod (light from 0900 to 2100 h) were maintained. Physiological changes in metabolic rate (MR), evaporative water loss (EWL), plasma corticosterone, body water turnover, and food and water intake were measured. The results indicate a significantly (P less than 0.001) elevated plasma corticosterone and MR in rats exposed directly to heat from control temperature (24.5 degrees C) but not in those animals exposed stepwise via 29.0 degrees C. All kinetic parameters of water pool changed (P less than 0.01) on direct exposure to heat, whereas rats exposed in a stepwise manner increased only pool turnover. In addition, exposure to experimental temperatures resulted in reduced (P less than 0.05) relative food intake and increased (P less than 0.05) water intake. Compared with the control condition of 24.5 degrees C, EWL was significantly (P less than 0.05) elevated when the animals were exposed either directly or in a stepwise fashion to 32.5 degrees C. These data suggest that the response to elevated temperatures is influenced by the temperature to which the rat is acclimated.

Growth and bone haemodynamic responses to castration in male rats. Reversibility by testosterone

1984 ◽  
Vol 107 (3) ◽  
pp. 428-432 ◽  
Author(s):  
A. Schoutens ◽  
M. Verhas ◽  
M. L'Hermite-Baleriaux ◽  
M. L'Hermite ◽  
A. Verschaeren ◽  
...  
Keyword(s):  
Body Weight ◽  
Bone Growth ◽  
Accretion Rate ◽  
Calcium Content ◽  
Male Rats ◽  
Testosterone Replacement Therapy ◽  
Physiological Changes ◽  
Tibial Length ◽  
Negative Effect ◽  
Old Rats

Abstract. Orchidectomy in postpubertal 55 day old rats, compared to sham-operated controls, led beyond 2 months to a decrease in body weight (87% of controls by 120 d), tibial length (97% of controls) and in tibial calcium content (85% of controls). Bone plasma flow increased three times to reach a peak at 31 days; it was decreased but no significantly at 86 and 120 days. The number of oosteoclasts was maximal at 51 days (X 2.3) and was still elevated at 120 days. The calcium accretion rate increased briefly at 31 days (110% of controls) and was diminished at 86 and 120 days (78% of controls). The initial 'physiological' changes in the tibia occurred before any weight change and might be directly due to the lack of androgens. They can be interpreted as inducing the conditions for enhanced bone resorption. Testosterone replacement therapy, initiated after the initial haemodynamic response, inhibited the negative effect of castration on bone growth.

Physiological Changes in Androgen Plasma Levels with Elapsing of Time from Castration in Adult Male Rats

1988 ◽  
Vol 20 (02) ◽  
pp. 96-99 ◽  
Author(s):  
S. Ando ◽  
S. Aquila ◽  
E. Beraldi ◽  
M. Canonaco ◽  
M. Panno ◽  
...  
Keyword(s):  
Adult Male ◽  
Plasma Levels ◽  
Male Rats ◽  
Physiological Changes

Aluminum Chloride Administration Induced Behavioral and Physiological Changes in Adult Male Rats

2019 ◽  
Vol 10 (10) ◽  
pp. 3032
Author(s):  
Halla Abdul-Hadi CHabuk ◽  
Hussein Jasim Al-Harbi ◽  
Haider Kamil Zaidan Al-Saadi
Keyword(s):  
Adult Male ◽  
Aluminum Chloride ◽  
Male Rats ◽  
Physiological Changes

CHANGES IN THE LEVELS OF LUTEINIZING HORMONE AND TESTOSTERONE IN THE CIRCULATION OF AGEING MALE RATS

1978 ◽  
Vol 76 (3) ◽  
pp. 551-552 ◽  
Author(s):  
G. D. GRAY
Keyword(s):  
Complex Interaction ◽  
Male Rats ◽  
Hormonal Changes ◽  
Physiological Changes ◽  
Functional Relationships ◽  
School Of Medicine ◽  
Age Related ◽  
Ageing Male ◽  
Old Rats ◽  
Time Information

Department of Physiology, Stanford University School of Medicine, Stanford, California 94305, U.S.A. (Received 26 September 1977) Pituitary-testicular function changes substantially with increasing age in male rats; the levels of testosterone and gonadotrophins in the circulation are reduced in old animals (Ghanadian, Lewis & Chisholm, 1976; Riegle & Meites, 1976; Chan, Leathem & Esashi, 1977). However, previous studies compared only young and very old rats (more than 18 months) and the development of age-related changes in the concentrations of testosterone and gonadotrophins has not been examined. Since ageing is a complex interaction of physiological changes over a prolonged period of time, information on the precise timing of the various changes is important in establishing functional relationships in the ageing process. This study investigates hormonal changes in a group of male rats between 8 and 21 months old. Adult male Long–Evans rats were housed three/cage in a temperature-controlled room with a 14

scholarly journals Hormonal Physiological Changes of Testis Resulting From Exposure to Vinyl Cyanide and the Possible Protective Role of β-cryptoxanthin in Male Rat

2021 ◽  
Vol 36 (2) ◽  
pp. 167-174
Author(s):  
Nura I. Al-Zail
Keyword(s):  
Serum Testosterone ◽  
Protective Role ◽  
Male Rats ◽  
Male Rat ◽  
Albino Rats ◽  
Physiological Changes ◽  
Human Beings ◽  
Endocrine Parameters ◽  
Aliphatic Nitrile

Vinyl cyanide (VCN) is an aliphatic nitrile product which is extensively used in various synthetic chemical industries. VCN is known to exert toxic actions to human beings as well as experimental animals. The present study was designed to examine the ability of β-cryptoxanthin, a naturally occurring antioxidant, to attenuate VCN-induced testicular toxicity in adult albino rats. Daily oral administration of VCN at a dose level of 30 mg/kg b.w. (7.2mg/ animal) to male rats for a period of 5 days significantly reduced the levels of serum testosterone (T), androsterone, follicle-stimulating hormone (FSH) and luteinizing hormone (LH) which indicates injury to the testis function. Compared to VCN-treated animals, pretreatment with β-cryptoxanthin and its co-administration with VCN once daily at a dose of 40 mg/kg b.w. (9.6mg/ animal) for 30 days induced a remarkable degree of improvement in the levels of endocrine parameters including T, androsterone, FSH and LH. In conclusion, the present results clearly demonstrate the protective role of β-cryptoxanthin against VCN-induced physiological changes in the testis of rats.

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