Influence of season, gonadotropins, and gonadal hormones on the thyroid activity of freshwater perch, Anabas testudineus (Bloch)

1983 ◽  
Vol 61 (2) ◽  
pp. 359-364 ◽  
Author(s):  
Pradip Chakraborti ◽  
Deb Kumar Rakshit ◽  
Samir Bhattacharya
Keyword(s):  
Body Weight ◽  
Luteinizing Hormone ◽  
Reproductive Cycle ◽  
Follicle Stimulating Hormone ◽  
Gonadal Hormones ◽  
Thyroid Activity ◽  
Anabas Testudineus ◽  
Ovarian Steroids ◽  
17Β Estradiol ◽  
Stimulating Hormone

Perch thyroid activity fluctuated in different phases of the reproductive cycle, being highest at spawning and lowest at postspawning. Treatment of intact perch with salmon gonadotropin (SG-G100) or ovine luteinizing hormone (LH) (1 μg/100 g body weight) for 15 days markedly enhanced thyroid activity. The extent of stimulation was greater with SG-G 100 than with LH. Follicle-stimulating hormone (FSH) had no effect. Ovarian steroids, 17β-estradiol and estrone (100 ng/100 g body weight), also significantly augmented thyroid activity. There was a striking reduction of thyroid activity as a result of ovariectomy, a decrease that could not be improved by SG-G100; however, estrone or 17β-estradiol supplementation resulted in a significant increase of thyroid activity in comparison with ovariectomized controls. These findings suggest that gonadotropin mediated its stimulatory effect on perch thyroid activity via the release of ovarian steroids.

Pharmacological doses of calcitonin reduce sex hormone levels in rat plasma

1988 ◽  
Vol 119 (4) ◽  
pp. 525-528 ◽  
Author(s):  
Talaat S. Mahrous ◽  
Atif M. Nakhla
Keyword(s):  
Body Weight ◽  
Luteinizing Hormone ◽  
Salmon Calcitonin ◽  
Follicle Stimulating Hormone ◽  
Plasma Concentrations ◽  
Rat Plasma ◽  
Sex Hormone ◽  
Time Dependent ◽  
Hormone Levels ◽  
Stimulating Hormone

Abstract. Administration of a pharmacological dose of salmon calcitonin into rats (10 MRC U/kg body weight) significantly reduced plasma concentrations of testosterone and estradiol in a time-dependent fashion. This apparently was mediated by a diminished secretion of luteinizing hormone and follicle-stimulating hormone, the levels of which were also significantly reduced after 1 h of calcitonin administration.

scholarly journals Effect of Tramadol on Hormones and Lipid Peroxidation of male Rabbits

2021 ◽  
pp. 908-913
Author(s):  
Eman, G. A. Allafi ◽  
Om-alsaad E. I. Omar ◽  
Fayrouz. A. Khaled
Keyword(s):  
Lipid Peroxidation ◽  
Body Weight ◽  
Luteinizing Hormone ◽  
Negative Impact ◽  
Follicle Stimulating Hormone ◽  
Thiobarbituric Acid ◽  
Thiobarbituric Acid Reactive Substances ◽  
The Common ◽  
Keywords Tramadol ◽  
Stimulating Hormone

Tramadol manhandle straightforwardly impacts the discharge of luteinizing hormone and follicular stimulating g hormone from the front pituitary organ that diminishes the common discharge of luteinizing hormone in a pulsatile way, resulting in a negative impact on male testiclesdue to lower levels of testosterone hormone. Animals were orally given 40 mg/kg B.W. doses of tramadol. The tried measurements were given to rabbits each other day for 6 weeks. Tramadol significantly decreased body weight (BW), weight of brain, testes, testosterone, estradiol, follicle stimulating hormone (FSH), luteinizing hormone (LH), triiodothyronine (T3) and thyroxin hormone (T4). While, it caused significant increase in thiobarbituric acid-reactive substances (TBARS) concentrations in plasma, testes and brain. Keywords: Tramadol; Hormone; TBARS; Rabbits

scholarly journals Gonadal hormones level and morphometric traits in cow deliveres twin and single calves

2017 ◽  
Vol 42 (2) ◽  
pp. 128
Author(s):  
T. Yuwono ◽  
I. Sumeidiana ◽  
Y. S. Ondho ◽  
E. Kurnianto
Keyword(s):  
Body Weight ◽  
Luteinizing Hormone ◽  
Follicle Stimulating Hormone ◽  
Gonadal Hormones ◽  
Abdominal Circumference ◽  
Morphometric Traits ◽  
Beef Cow ◽  
Central Java ◽  
Significant Difference ◽  
Crossbred Cow

The objectives of study were to investigate follicle stimulating hormone (FSH) and luteinizing hormone (LH) level in four groups beef cow composed of Ongole Grade cow delivered twinning calves (OGT), Ongole Grade cow delivered single calf (OGS), Simmental crossbred cow delivered twinning calves (SCT) and Simmental crossbred cow delivered single calf (SCS). Morphometric traits included body weight, heart girth, body length, shoulder height, and abdominal circumference were taken from cows. Cows were reared by farmers in Grobogan and Kendal Regency, Central Java. Blood serums of cows were taken at estrus. FSH and LH concentration were measured with enzyme linked fluorescent assays (ELFA) technique.FSH and LH concentration were compared between OGT, OGS, SCT, and SCS. Result showed that there were no significant difference of FSH and LH concentration between OGT and OGS, between OGT and SCT, between OGT and SCS. There were no significant difference between OGS and SCT, and OGS and SCS. There were no significant difference between SCT and SCS. Low concentration of FSH and LH in all cows was related to suckle period, when prolactin concentration was inversely related to FSH and LH concentration.

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