Some effects of ovarian hormones on food intake and body weight in female rats.

1975 ◽  
Vol 88 (1) ◽  
pp. 183-193 ◽  
Author(s):  
George N. Wade
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Ovarian Hormones ◽  
Female Rats

Effect of (-)-hydroxycitrate on development of obesity in the Zucker obese rat

1981 ◽  
Vol 240 (1) ◽  
pp. E72-E78 ◽  
Author(s):  
M. R. Greenwood ◽  
M. P. Cleary ◽  
R. Gruen ◽  
D. Blase ◽  
J. S. Stern ◽  
...  
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Cell Size ◽  
Treatment Period ◽  
Body Fat ◽  
Substantial Reduction ◽  
Female Rats ◽  
Fat Cell ◽  
Fat Cell Size ◽  
Obese Rats

Young Zucker lean (Fa/-) and obese (fa/fa) female rats were fed the fatty acid synthesis inhibitor (-)-hydroxy-citrate as a dietary admixture for 39 days. In the lean rats, (-)-hydroxycitrate treatment decreased body weight, food intake, percent of body fat, and fat cell size. In the obese rat, food intake and body weight were reduced but the percent of body fat remained unchanged. Throughout the treatment period, obese rats maintained a fat cell size equivalent to their obese controls. Although a reduction in fat cell number in the obese rats occurred during the treatment period, marked hyperplasia was observed during the posttreatment period. The results of this study indicate that the obese rat, despite a substantial reduction in body weight produced by (-)-hydroxycitrate, still defends its obese body composition.

BODY WEIGHT AND FOOD CONSUMPTION OF LACTATING RATS NURSING VARIOUS SIZES OF LITTERS

1967 ◽  
Vol 38 (3) ◽  
pp. 263-268 ◽  
Author(s):  
K. ÔTA ◽  
A. YOKOYAMA
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Food Consumption ◽  
Ovarian Function ◽  
Experimental Period ◽  
Close Correlation ◽  
Female Rats ◽  
Linear Relationships ◽  
Rate Of Increase ◽  
Daily Gain

SUMMARY Changes in body weight and food consumption during lactation in rats nursing various sizes of litters were studied. The rate of increase in body weight of the mother rats during the experimental period (day 3–14 of lactation) was very similar in mothers with different numbers (2, 4, 8 and 12) of suckling pups/litter. It is suggested that the weight increase of adult female rats during lactation is related more closely to the alteration of ovarian function caused by the suckling stimulus than to the enhanced food intake during this period. Both the food intake of mother rats and the daily gain in weight of litters increased as the number of suckling pups/litter increased and as lactation advanced. Linear relationships were observed between the logarithm of the litter size and both the food intake of the mother rats and the weight gain of the litters. The presence of a close correlation between the food intake of mother rats and the quantity of milk produced by them is suggested.

Impeded Eruption Rate of the Rat Maxillary Incisor During Exposure to Different Simulated Altitudes

1987 ◽  
Vol 66 (9) ◽  
pp. 1490-1492 ◽  
Author(s):  
M.J. Giglio ◽  
A.M. Sanz ◽  
A. Constanzo ◽  
C.E. Bozzini
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Sea Level ◽  
Body Length ◽  
Conclusive Evidence ◽  
Female Rats ◽  
Maxillary Incisor ◽  
Eruption Rate ◽  
Insight Into

Female rats weighing about 200 g each were separated into normoxic and hypoxic groups. The former were maintained at sea-level conditions. The hypoxic groups were placed in an altitude chamber and maintained at the equivalent of 1850 m, 4100 m, or 7100 m over a period of two weeks. Hematocrit, body weight, body length, and impeded eruption rate were recorded once a week. Food intake was recorded every day. Exposure to 1850 m did not significantly alter hematocrit, body weight and body length gains, food intake, and impeded eruption rate. Nevertheless, exposure to 4100 m and 7100 m decreased body weight and body length gains, food intake, and impeded eruption rate, and increased hematocrit value. These parameters varied as a function of altitude. In spite of the lack of conclusive evidence, this work affords further insight into the particular significance of polycythemia on the eruption rate.

scholarly journals Effect of chronic infusion of olanzapine and clozapine on food intake and body weight gain in male and female rats

Life Sciences ◽  
2007 ◽  
Vol 81 (12) ◽  
pp. 1024-1030 ◽  
Author(s):  
SuJean Choi ◽  
Briana DiSilvio ◽  
JayLynn Unangst ◽  
John D. Fernstrom
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Food Intake ◽  
Body Weight Gain ◽  
Female Rats ◽  
Male And Female ◽  
Male And Female Rats ◽  
Chronic Infusion

Stimulation of food intake and weight gain in mature female rats by bovine prolactin and bovine growth hormone

1993 ◽  
Vol 264 (6) ◽  
pp. E986-E992 ◽  
Author(s):  
J. C. Byatt ◽  
N. R. Staten ◽  
W. J. Salsgiver ◽  
J. G. Kostelc ◽  
R. J. Collier
Keyword(s):  
Growth Hormone ◽  
Body Weight ◽  
Weight Gain ◽  
Food Intake ◽  
Body Weight Gain ◽  
Mature Female ◽  
Female Rats ◽  
Bovine Growth Hormone ◽  
Female Rat ◽  
Moisture Percentage

Recombinant bovine prolactin (rbPRL) or bovine growth hormone (rbGH) was administered to mature female rats (10/treatment group) by daily subcutaneous injection for 10 days. Doses ranged from 7 to 5,000 micrograms/day (0.03-24 mg/kg body wt). Both rbPRL and rbGH increased body weight gain and food intake, but these parameters were increased at lower doses of rbPRL (7-63 micrograms/day) than rbGH (> 190 micrograms/day). Weight gain and food intake were maximally stimulated by 190 micrograms/day rbPRL, whereas maximal increased weight gain was obtained with the highest dose of rbGH (5,000 micrograms/day). Total carcass protein was increased by both hormones; however, protein as a percentage of body weight was unchanged. Similarly, neither rbPRL nor rbGH changed the percentage of carcass moisture. Percentage of body fat was increased by rbPRL but was decreased by rbGH. Weight of the gastrointestinal tract and kidneys was increased by both hormones, but increases were in proportion to body weight gain. These data confirm that ungulate prolactin is a hyperphagic agent in the female rat. In addition, they suggest that, while prolactin stimulates growth in mature female rats, this growth is probably not via a somatogenic mechanism.

Food intake, body weight, and adiposity in female rats: actions and interactions of progestins and antiestrogens

1981 ◽  
Vol 240 (5) ◽  
pp. E474-E481 ◽  
Author(s):  
J. M. Gray ◽  
G. N. Wade
Keyword(s):  
Body Weight ◽  
Adipose Tissue ◽  
Food Intake ◽  
Estradiol Benzoate ◽  
Female Rats ◽  
Antiestrogenic Activity ◽  
Ovx Rats ◽  
Increase Food Intake ◽  
Series Of Experiments ◽  
Adipose Tissue Lipoprotein Lipase

A series of experiments examined the effects of two progestins, progesterone and R 5020, and two nonsteroidal antiestrogens, nafoxidine and MER-25, on body weight and composition in female rats. Both progesterone and R 5020 increased food intake, body weight, and carcass adiposity in ovariectomized (OVX) rats treated with estradiol benzoate (EB), but neither progestin had any effect on these measures in OVX rats not treated with EB. R 5020 was substantially more effective than progesterone on all end points. Nafoxidine and MER-25 mimicked the actions of estradiol and decreased adipose tissue lipoprotein lipase (LPL) activity by 75–80%. For adipose tissue LPL activity, both nafoxidine and MER-25 were full estrogen agonists and without antiestrogenic activity. Nafoxidine also mimicked the effects of EB by reducing food intake, body weight, and carcass adiposity in OVX rats. In contrast, nafoxidine antagonized the induction of cytoplasmic progestin ([3H]R 5020) binding sites by EB in parametrial adipose tissue of OVX rats. In nafoxidine-treated OVX rats, concurrent progesterone administration had no effect on adipose tissue LPL activity, but progesterone did increase food intake, body weight, and carcass fat content. Some physiological mechanisms by which gonadal steroids may act to influence eating and adiposity are discussed.

Sex Differences in Severity of Inflammation-Induced Anorexia and Weight Loss

2004 ◽  
Vol 5 (4) ◽  
pp. 255-264 ◽  
Author(s):  
Terry A. Lennie
Keyword(s):  
Weight Loss ◽  
Body Weight ◽  
Sex Differences ◽  
Food Intake ◽  
Acute Inflammation ◽  
Sesame Oil ◽  
Female Rats ◽  
Male Rats ◽  
Weight Changes ◽  
Body Weight Changes

Food intake and body weight changes in response to induction of acute inflammation were examined in intact cycling females, ovariectomized females, and sham-operated male rats. In intact females, body weight and feeding responses were compared between rats in which inflammation was induced on day of estrus with rats in which inflammation was induced on day of diestrus. Anorexia and weight loss were more severe in the female rats with inflammation induced on estrus day, which coincides with peak serum estrogen levels. In ovariectomized females, inflammation was induced the day after rats received injections of estrogen, progesterone, or sesame oil (vehicle). Males received vehicle injections. Among female rats, the group that received estradiol injections the previous day displayed the most severe anorexia. The least severe anorexia was observed in female rats that received progesterone the previous day. Food intake of female rats that received vehicle injections prior to induction of inflammation was greater than the rats receiving estrogen but less than the rats receiving progesterone. Male rats displayed the most severe anorexia and greatest weight loss. These data suggest that, although females exposed to estradiol prior to induction of acute inflammation display more severe anorexia than those exposed to progesterone, it may be that progesterone attenuates severity of anorexia rather than estrogen solely potentiating severity. Male rats, however, appear to experience the most severe anorexia in response to this form of inflammation.

Pattern of food intake and body weight gain in aged, noncycling female rats

1976 ◽  
Vol 18 (4) ◽  
pp. 551-561 ◽  
Author(s):  
Ralph L. Cooper ◽  
Markku Linnoila
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Food Intake ◽  
Body Weight Gain ◽  
Female Rats

Effects of chronic testosterone administration on body weight and food intake differ among pre-pubertal, gonadal-intact, and ovariectomized female rats

2016 ◽  
Vol 309 ◽  
pp. 35-43 ◽  
Author(s):  
Takeshi Iwasa ◽  
Toshiya Matsuzaki ◽  
Altankhuu Tungalagsuvd ◽  
Munkhsaikhan Munkhzaya ◽  
Mayila Yiliyasi ◽  
...  
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Female Rats ◽  
Testosterone Administration
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