EFFECT OF MELATONIN UPON THYROID HORMONE SECRETION RATE IN FEMALE HAMSTERS AND MALE RATS

1972 ◽  
Vol 69 (1) ◽  
pp. 35-40 ◽  
Author(s):  
D. V. Singh ◽  
C. W. Turner
Keyword(s):  
Body Weight ◽  
Thyroid Hormone ◽  
Hormone Secretion ◽  
Secretion Rate ◽  
Male Rats ◽  
Male Rat ◽  
Maximum Effect ◽  
Control Group ◽  
Sprague Dawley ◽  
The Mean

ABSTRACT Thyroid hormone secretion rate (TSR) of female golden hamsters and male Sprague-Dawley-Rolfsmeyer rats at 25 days of age were estimated as 0.75 μg L-T4/100 g body weight and 1.41 μg L-T4/100 g body weight respectively. The mean TSR of control group of both hamster and male rat reduced at 55 days (0.60 and 1.20 μg L-T4/100 g body weight, respectively) gives further evidence of aging. In hamsters, melatonin treatment at higher levels had no greater depressing effect upon TSR than the lower level, but had greater effect on food consumption. However, in male rats, melatonin depressed TSR at the higher level only. It seems that hamster is more sensitive to melatonin than rats. Thus the lower level exerts a maximum effect whereas in the rat, higher levels are required for maximum effect.

scholarly journals 6. Administration of Centella Leaf Extract (Centella asiatica (L.) Urban) for Decreasing cAMP Responsive Element Modulator (CREM) Expression in Testicular Seminiferous Tubule of Male Rats (Rattus norvegicus)

2016 ◽  
Vol 1 (2) ◽  
pp. 31-37
Author(s):  
Susi Darmayanti ◽  
Sri Wahyuni ◽  
Muslim Akmal ◽  
Tongku Nizwan Siregar ◽  
Sugito Sugito
Keyword(s):  
Body Weight ◽  
Rattus Norvegicus ◽  
Leaf Extract ◽  
Centella Asiatica ◽  
Male Rats ◽  
Male Rat ◽  
Seminiferous Tubules ◽  
Control Group ◽  
Responsive Element ◽  
Neutral Formalin

The objective of this study was to determine the effect of centella leaf extract administration on decreased of the molecule cAMP responsive element modulator (CREM) expression in the testicular seminiferous tubules of male rats (Rattus norvegicus). Eight rats, aged 3.5 months with 150-250 grams of body weight (BW) were used in this study. All rats were divided randomly into four groups as if K0 as a control group whereas K1, K2, and K3 were given the centella leaf extract with doses 125, 250, and 500 mg / kg body weight respectivelly that given once daily for 30 days. At the end of the treatment, rats were sacrificed and their testes were collected and subsequently fixed in buffered neutral formalin (BNF) 10% as fixative solution for histological preparation. The CREMs expressions were detected using immunohistochemical methods. The results showed that the number of CREM expression in the seminiferous tubules significantly differ (P <0.05) between K0 and the treatment group (K1, K2, and K3). Conclusion, the administration of centella leaf extract with of the dose 125, 250, and 500 mg/kg BW can decreased CREM expression spermatids of testicular seminiferous tubules in male rat.

Effects of Testosterone Metabolites on Serum Gonadotropin Concentrations in Immature Male Rats

1975 ◽  
Vol 53 (5) ◽  
pp. 839-844 ◽  
Author(s):  
William H. Moger
Keyword(s):  
Body Weight ◽  
Testosterone Propionate ◽  
Male Rats ◽  
Ventral Prostate ◽  
Male Rat ◽  
Control Group ◽  
Immature Male ◽  
Serum Lh ◽  
Serum Gonadotropin ◽  
Testosterone Metabolites

The ability of testosterone, androsterone, 5α-androstane-3α,17β-diol, and 5α-androstane-3β,17β-diol to prevent the castration-induced rise in serum gonadotropin levels was investigated in immature male rats. Rats castrated at 30 days of age were treated once per day by subcutaneous injection of 12.5–100 μg of the steroid per 100 g body weight per day for 3 days, beginning on the day of castration. The animals were sacrificed 24 h after the last injection. Testosterone propionate, androsterone propionate, and 5α-androstane-3α,17β-diol dipropionate were also tested at the approximate molar equivalent of 100 μg of the free alcohol form per 100 g body weight per day.Testosterone propionate and 5α-androstane-3α,17β-diol were the only compounds tested that prevented the castration induced rise in luteinizing hormone (LH) concentrations. Testosterone propionate also inhibited the rise in follicle stimulating hormone (FSH) concentrations whereas 5α-androstane-3α,17β-diol inhibited the rise in FSH in one but not in another experiment. These were the only compounds tested that affected serum FSH concentrations.The lower doses of testosterone tested significantly increased serum LH, but not FSH concentrations compared to castrate control animals. The highest dose tested partially inhibited the rise in serum LH concentrations.Both androsterone and androsterone propionate maintained ventral prostate weights. Although neither compound prevented the castration induced rise in serum LH, two groups receiving androsterone had serum LH concentrations significantly lower than the castrate control group.5α-Androstane-3β,17β-diol and 5α-androstane-3α,17β-diol dipropionate failed to maintain ventral prostate weights or prevent the rise in serum gonadotropin levels.These results indicate that 5α-androstane-3α,17β-diol is capable of preventing the castration induced rise in serum LH concentrations in the immature male rat and thus may participate in the regulation of LH secretion in these animals.

The effects of an anabolic steroid (oxandrolone) on reproductive development in the male rat

1992 ◽  
Vol 126 (2) ◽  
pp. 173-178 ◽  
Author(s):  
Bernard H Grokett ◽  
Nazir Ahmad ◽  
Dwight W Warren
Keyword(s):  
Anabolic Steroid ◽  
Reproductive System ◽  
Leydig Cells ◽  
Anabolic Steroids ◽  
Reproductive Development ◽  
Male Rats ◽  
Male Rat ◽  
Control Group ◽  
Sprague Dawley ◽  
Personal Appearance

Oxandrolone is a 5α-reduced anabolic steroid that is administered for the treatment of short stature disease in children. It is a commonly used substance beginning as early as prepuberty by some individuals who are seeking to enhance athletic performance or personal appearance. Because of the lack of data on the effects of anabolic steroids on the reproductive system, we have examined the effects of oxandrolone treatment on reproductive development in male rats with treatment beginning two days after weaning. Male, Sprague-Dawley rats (N=12) received a daily subcutaneous injection of oxandrolone (32.7 μmol·kg−1·day−1) and the control group (N= 12) received vehicle only (dimethyl sulfoxide). Treatment began at age 23 days and continued to 60 days of age. The weights of the testes, prostate glands, and seminal vesicles in the treatment group were 69%, 50% and 29% below control levels, respectively and were all significantly decreased (p<0.01). Testicular testosterone production in a 3-h incubation was inhibited in the treated animals to 1.3% of control values (p<0.001). Serum FSH (11.7% of control) and LH (undetectable) in the treated animals were both significantly less than controls. Histological findings indicated an arrest of advanced spermatids and a severe depletion of Leydig cells in the interstitial compartment. It was concluded that treatment of immature male rats with oxandrolone results in effects on the adult male reproductive system which are profound and occur at several levels. The most likely affected sites are the hypothalamus, pituitary gland, and the Leydig cells.

scholarly journals RUSIP SEHUBUNGAN PROFIL LIPID DALAM KEADAAN HIPERKOLESTEROLEMIA

2018 ◽  
Vol 20 (2) ◽  
pp. 97
Author(s):  
Indranila KS ◽  
Satrianugraha MD
Keyword(s):  
Body Weight ◽  
Lipid Profile ◽  
White Male ◽  
Hdl Cholesterol ◽  
Male Rats ◽  
Control Group ◽  
High Cholesterol Diet ◽  
Sprague Dawley ◽  
Research Subjects ◽  
The Difference

Rusip is a fermented fish product made from anchovies. Several lactic acid bacteria have been identified in rusip fermentation. Lacticacid bacteria are known to be able to reduce serum cholesterol. The aim of the research was to know the lipid profile changes due toadministration of rusip in hypercholesterolemia rats. The research was done by using Pre and Post Randomized Controlled Group Design.The research subjects consisted of twenty-eight Sprague Dawley strain white male rats aged 20 weeks with normal body weight, who weregiven a high-fat high-cholesterol diet, then divided into four (4) groups: control group, without Rusip administration; P1, P2 and P3 whoreceived 2.55; 5.10 and 7.65 mg Rusip/g body weight. After 14 days treatment, blood samples were taken to determine the lipid profileusing enzymatic methods. ANOVA or alternative test, was used to test the difference between the groups at the 95% confidence level. Basedon the research, the administration of Rusip in the treatment group caused significant changes in the lipid profiles of hypercholesterolemiarats (p<0.05). The total cholesterol, triglycerides and LDL cholesterol levels decreased significantly in all three treatment doses (p<0.05).The HDL cholesterol increased significantly in all three treatment doses (p<0.05). The highest change in lipid profile results was obtainedin the treatment of P3 to all variables. In this study, it was found that administration of Rusip could improve the state of blood lipidprofiles of hypercholesterolemia rats. Whereas, the highest changes were obtained in treatment with P3.

CHANGES IN THYROID ACTIVITY DURING GROWTH IN THE SHEEP

1961 ◽  
Vol 22 (1) ◽  
pp. 23-30 ◽  
Author(s):  
I. R. FALCONER ◽  
H. A. ROBERTSON
Keyword(s):  
Body Weight ◽  
Energy Metabolism ◽  
Thyroid Hormone ◽  
Rate Constants ◽  
Hormone Secretion ◽  
Secretion Rate ◽  
Initial Increase ◽  
Thyroid Activity ◽  
Thyroid Uptake ◽  
Unit Body Weight

SUMMARY The rate constants for thyroid uptake (K1) and release (K4) of 131I, the serum protein-bound iodine (PBI) level and the rate of secretion of thyroid hormone have been determined for sheep from 5 weeks to 7 years old. The secretion rate of thyroid hormone has been shown to increase rapidly up to the age of 6–8 months, and then decline slightly with increasing age. The rate constant for 131I release from the thyroid (K4), showed an increase up to 1 year of age, and considerably lower values at 5 and 7 years old. When the thyroid hormone secretion rate is expressed per unit body weight, the highest rate was observed at approx. 6 months of age or 20–40 kg. body weight. The significance of this initial increase in thyroid hormone secretion rate per unit body weight is discussed in conjunction with the results of other workers on the energy metabolism of immature animals. Serum PBI levels decreased sharply during the 1st year of life and then remained relatively constant.

Thyroid hormone secretion rate and milk yield in lactating rats

1961 ◽  
Vol 200 (3) ◽  
pp. 483-485 ◽  
Author(s):  
Clark E. Grosvenor
Keyword(s):  
Body Weight ◽  
Thyroid Hormone ◽  
Milk Yield ◽  
Hormone Secretion ◽  
Secretion Rate ◽  
Female Rats ◽  
Milk Secretion ◽  
Maternal Body ◽  
Thyroid Secretion

Thyroid secretion rate (TSR) obtained from primiparous lactating rats during the first 14 days of lactation averaged 1.93 µg/100 gm/day l-thyroxine or 130% more than obtained from nonlactating female rats of the same age and strain. TSR was significantly correlated with the amount of milk obtained from mothers on day 14 of lactation. TSR obtained from the same rats during a second 14-day period of lactation (nursing a foster litter) was significantly reduced to an average of 0.98 µg/100 gm/day l-thyroxine. A significant reduction in milk yield on day 28 accompanied the reduction in TSR. The reduction in milk secretion during the second 14 days of lactation resulted in slower growth of the foster litters. Maternal body weight was unaltered. In a second experiment the average TSR of 2.10 µg/100 gm/day obtained during the first 14 days of lactation fell to 0.75 µg/100 gm/day during a subsequent 14-day period of nonnursing. The intensity of lactation apparently is associated with the intensity of thyroid hormone output, and inadequate thyroid hormone secretion may be an important factor in the decline of milk secretion.

scholarly journals Effect of Peanut (Arachis hypogaea) on Kidney in Rats

2014 ◽  
Vol 2 (1) ◽  
pp. 17-21
Author(s):  
Sadia Choudhury Shimmi ◽  
M Tanveer Hossain Parash ◽  
Lazina Afrin ◽  
Pervin Akter
Keyword(s):  
Body Weight ◽  
Serum Creatinine ◽  
Arachis Hypogaea ◽  
Biochemical Parameters ◽  
Treated Group ◽  
Male Rats ◽  
Control Group ◽  
Peanut Kernel ◽  
The Mean ◽  
Experimental Group

Background: Kidney is the main excretory organ which can be damaged by various disease conditions, foods, exposure to some chemicals, toxins, or infectious agents. Peanuts (Arachis hypogaea) may have antioxidant activity thereby can be used for the improvement of kidney functions though its exact role is yet to be explored. Objective: To observe the effect of peanut kernel powder on kidney by observing the histology and some biochemical parameters (serum creatinine and blood urea) in Wistar albino rats. Materials and method: This experimental study was conducted between October 2012 to December 2012 in the Institute of Food and Nutrition, University of Dhaka, Bangladesh. A total number of 20 apparently healthy Wistar albino male rats, weighing between 120 to 150 grams, age range 90 to 120 days were used. Prior to conducting the study, the animals were acclimatized for 14 days. Then, they were divided into two groups; control group (Group A) consisted of 10 rats and experimental group (Group B- Peanut treated group) consisted of 10 rats. All groups of animals received basal diet for 21 consecutive days and in addition, experimental group received peanut kernel powder (500mg/kg body weight/day; orally) in the morning along with food for 21 consecutive days. All the animals were sacrificed on 22nd day. The blood and kidney samples were collected. Blood urea, serum creatinine levels were measured and histopathology of kidney was done by using standard laboratory procedure. Results: The mean body weight of peanut treated group was significantly lower than that of control group. The mean blood urea and creatinine levels were higher in peanut treated group in comparison to those of control group but the differences were not statistically significant. On histology, kidney revealed normal findings both in control and peanut treated group. Conclusion: Role of peanut kernel powder in normalizing the biochemical parameters is controversial. DOI: http://dx.doi.org/10.3329/dmcj.v2i1.17792 Delta Med Col J. Jan 2014; 2(1): 17-21

scholarly journals Effect of Different Doses of Nitrate Supplements on hepatocellular Damage Markers in Male Sprague Dawley Rats Following One Session of Exercise

2020 ◽  
pp. 119-133
Keyword(s):  
Body Weight ◽  
Low Dose ◽  
Male Rats ◽  
Control Group ◽  
High Dose ◽  
Sprague Dawley ◽  
Hepatocellular Damage ◽  
Sprague Dawley Rats ◽  
And Control ◽  
Different Doses

Background: Hepatocellular damage caused by physical activity or the use of supplements is one of the serious problems facing athletes in various fields. This study aimed to evaluate the effect of different doses of nitric oxide supplements on AST and ALT liver enzymes and the ratio of AST to ALT following a session of eccentric exercise in Sprague Dawley male rats. Materials and Methods: In this study, 36 Sprague Dawley male rats (two months old) were divided into three groups of control, low dose (4.8 mg/kg body weight), and high dose of NO supplements (15.4 mg/kg body weight). Supplements were given to rats for seven days. Subsequently, all three groups of rats were forced to run on a treadmill for 45 min with a speed of 20 m/min, and a slope of -15 degrees. Blood samples were taken directly from cardiac puncture of rats 24 h after the running exercise. Blood serum variables of the study were measured afterward. Results: Low dose of nitrate supplements did not change AST and ALT indices, while the high dose of nitrate supplements increased ALT serum level and decreased AST to ALT ratio, compared to a low dose of NO supplements and control group. Conclusion: Based on the obtained results, the consumption of a low dose of NO supplements does not change hepatocellular damage markers, while the high dose of NO supplements causes degeneration of hepatic cells in athletes.

Overtraining of aerobic physical exercise reduce rats (Rattus norvegicus) memory

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Ni Made Ridla Parwata
Keyword(s):  
Body Weight ◽  
Physical Exercise ◽  
Rattus Norvegicus ◽  
Research Method ◽  
Male Rat ◽  
Control Group ◽  
Adult Male Rat ◽  
The Subject ◽  
Heavy Training

Overtraining syndrome is a decrease in physical capacity, emotions and immunity due to training that is too often without adequate periods of rest. Overtraining is often experienced by athletes who daily undergo heavy training with short break periods. This research aims to look at the effect of overtraining aerobic physical exercise on memory in mice. The research method was experimental in vivo with the subject of adult male rat (Rattus Norvegicus) Winstar strain aged 8-10 weeks, body weight 200-250 gr. Divided into three groups, namely the control group, aerobic group and overtraining group. The results of memory tests with water E Maze showed an increase in the duration of travel time and the number of animal errors made by the overtraining group (p = 0.003). This study concludes that overtraining aerobic physical exercise can reduce memory in rat hippocampus.

Effect of High Plane of Nutrition on Blood Biochemical Profile and Onset of Puberty in Prepubertal HF X Kankrej Crossbred Heifers

2019 ◽  
Vol 15 (02) ◽  
pp. 14-17
Author(s):  
K K Hadiya ◽  
A J Dhami ◽  
D V Chaudhari ◽  
P M Lunagariya
Keyword(s):  
Body Weight ◽  
Treatment Group ◽  
Plasma Levels ◽  
Age Of Onset ◽  
The Body ◽  
Monthly Interval ◽  
Control Group ◽  
Blood Biochemical ◽  
Lower Protein ◽  
The Mean

This study was initiated on 24 prepubertal Holstein x Kankrej crossbred heifers of nearly identical age (7-9 months) and body weight (130-140 kg) at University farm to evaluate the effect of high plane of nutrition on blood biochemical and minerals profile and the age at puberty. Twelve heifers were managed under routine farm feeding (control) and the rest 12 under ideal optimum feeding regime (treatment) that included extra 1 kg concentrate, 30 g min mix and ad-lib dry fodder. The body weight and ovarian ultrasonography together with blood sampling was carried out at monthly interval from 10 to 18 months of age to study the ovarian dynamics and blood biochemical changes. High plane of nutrition to growing heifers was beneficial in reducing the age of onset of puberty (by 2-3 months) compared to routine farm fed group. The mean plasma total protein and cholesterol concentrations showed a rising trend with significant variations from 10 to 16 months of age, where it got mostly stabilized indicating adult profile. The activity of enzymes GOT and GPT also rose gradually and significantly from 10 months till 14-15 months of age, and thereafter it remained more or less static till 18 months of age. The levels of both these enzymes were higher, with lower protein and cholesterol, in control than the treatment group from 15-16 months of age onwards. The mean plasma levels of both calcium and phosphorus increased gradually and significantly with advancing age till 16-17 months of age, with little higher values in supplemented than a control group. The plasma levels of zinc, iron, copper, and cobalt also showed rising trend with significant differences between 10th and 12th-14th months of age, and from 15th to 18th months of age the levels were statistically the same in all the groups with slightly higher values in the treatment group.

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