Serum profiles of androstenedione, testosterone and LH from birth through puberty in buffalo bull calves

Hemeida, N.A.; El-Baghdady, Y.R.M.; El-Fadaly, M. A.

doi:10.1530/jrf.0.0740311

Cited by 10 publications

(2 citation statements)

References 27 publications

(51 reference statements)

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“…A linear relation in plasma testosterone with age was observed among the animals aged between 192 and 708 days. Similar changes in plasma testosterone were also noticed in investigations conducted on Egyptian buffalo bulls (Hemeida et al, 1985), Angus bull calves (Moura et al, 2001), Angus and Angus × Charolais bull calves (Brito et al, 2007), and Japanese Black bull calves (Kawate et al, 2011).…”

Section: Resultssupporting

confidence: 82%

Age-related changes in testicular parameters and their relationship to thyroid hormones and testosterone in male Murrah buffaloes

2018

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Abstract. The present study aims to investigate the age-related changes in testicular parameters and their association with plasma triiodothyronine (T 3 ), thyroxine (T 4 ), and testosterone in male Murrah buffaloes. Testicular measurements and single blood samples were collected from male Murrah buffaloes (n = 103) aged between 6 months and 8 years. The correlation coefficients of average testicular length (ATL), paired testis width (PTW), and scrotal circumference (SC) in relation to age were 0.88, 0.91, and 0.90, respectively. The regression equation between testicular weight (TW) and age was Y = 1.48 × x 0.005 (r = 0.90; R 2 = 0.79). Plasma T 4 and testosterone increased significantly (p < 0.001) with age and their levels ranged between 12.9 and 41.8 and 0.05 and 1.48 ng mL −1 , respectively. With respect to associations between testicular parameters and plasma hormone levels, we observed significant (p < 0.01) correlations between ATL, PTW, SC, TW, and plasma T 4 . A significant correlation (r = 0.31; p < 0.01) between plasma T 4 and testosterone levels was also observed. However, the correlations between plasma T 3 and testicular parameters and plasma T 3 and testosterone were non-significant. From the present study, we conclude that plasma T 4 is positively correlated with testicular parameters and plasma testosterone, indicating its role in testis development and steroidogenesis.

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Section: Resultssupporting

confidence: 82%

Age-related changes in testicular parameters and their relationship to thyroid hormones and testosterone in male Murrah buffaloes

2018

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“…with advancement of age the testosterone levels increased at 18 month mean (2.5 ng/ml ) in agreement of (Ahmad, N. et al, 1989, Bedair and Thibier, 1979, Gunarajasingam, et al, 1985 andBarreto-Filho, et al, 1996). The period of puberty is associated with quick testicular growth, increased the gonadotropins secretion, testosterone secretion in response to releases of LH and start of spermatogenesis (Hemeida, et al, 1985); During puberty a higher concentration of androgen is required for the beginning of spermatogenesis, (Handelsman, et (1984). This difference might be owing to breed difference and, nutritional factors and seasonal variations (Lunstra, et a, 1978 andPelletier, 1979).…”

Section: Discussionmentioning

confidence: 99%

Testicular biometry, ultrastructure, cellular cytometry and hormonal profile in relation to age in Egyptian buffaloes.

Ghania

Sosa

Mahmoud³

et al. 2020

Benha Veterinary Medical Journal

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This study was conducted on a number of (30) buffaloes in Qalubia. The age ranged from 12 to 36 month. There were divided into two groups: group (I) and group (II), their ages ranged from <18 month and ≥18 till 36 months, respectively. Testosterone levels in the blood, testicular biometry by the optical and the electronic microscope, and finally flow cytometry of the testicular cells were estimated. it was concluded that: The testosterone hormone level in the blood in group (I) and in group (II) was 1.9 ± 0.48 and 1.07 ± 0.35 ng/ ml serum prospectively, weight, length and width of the testicle in group (I) was 75± 13.8 gm., 7.3 ± 0.48cm and 4.22 ± 0.31 cm, respectively, and in group (II) was 118.38 ± 11.29 gm., 8.12 ± o.63 cm, and 5.0 ± 0.23 cm, respectively. The diameter of the seminiferous tubules in group (I) was 99.90 ± 17.4µm, while in group (II) was 104.6 ± 15.82 µm. The number of Leydig cells in group (I) was 40.14 ± 15.52, and in group (II) was 49.16 ± 27.99. The lining epithelium thickness of the seminiferous tubules in group (I) was 26.06 ± 5.51 µm, and in group (II) was 27.64 ±5.52 µm, while degree of cell degeneration in group (I) was 6.12±0.79 and in group (II) was 4.62±0.66. By using flow cytometer there was difference between 2 age group in the testicular cell and apoptosis. An electron micrograph showing difference in the testicular cells' ultrastructure Buffalo bull Electron microscope.

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Functional Morphology of the Male Reproductive System

Das,

Mukherjee,

Banerjee

2023

Textbook of Veterinary Physiology

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Serum profiles of androstenedione, testosterone and LH from birth through puberty in buffalo bull calves

Cited by 10 publications

References 27 publications

Age-related changes in testicular parameters and their relationship to thyroid hormones and testosterone in male Murrah buffaloes

Age-related changes in testicular parameters and their relationship to thyroid hormones and testosterone in male Murrah buffaloes

Testicular biometry, ultrastructure, cellular cytometry and hormonal profile in relation to age in Egyptian buffaloes.

Functional Morphology of the Male Reproductive System

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