Development of some male characteristics supported by oestrone but not dehydroepiandrosterone in the boar

Booth, W. D.

doi:10.1530/jrf.0.0680009

Cited by 20 publications

(20 citation statements)

References 30 publications

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“…Plasma concentrations of many steroid sulphates are substantially higher than that of their unconjugated forms [14,15]. In fact, dehydroepiandrosterone (DHEA) has been reported to be present primarily as a sulphoconjugate in porcine plasma, such that only 10-15% is in the nonconjugated form [16].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of free and sulphoconjugated 16-androstene steroids by the Leydig cells of the mature domestic boar

Sinclair

Squires

Raeside

et al. 2005

The Journal of Steroid Biochemistry and Molecular Biology

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Section: Introductionmentioning

confidence: 99%

Synthesis of free and sulphoconjugated 16-androstene steroids by the Leydig cells of the mature domestic boar

Sinclair

Squires

Raeside

et al. 2005

The Journal of Steroid Biochemistry and Molecular Biology

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“…In such boars, 5a-androstenone level was not related to sexual maturity since there was no significant correlation with testis or epididymis weight, and fat 5a-androstenone level depended on between-animal variability in the potentiality for steroid production, as shown by the significant correlations with seminal vesicle or bulbourethral gland development. Indeed, both glands are well-known target organs for androgens and estrogens in male pigs (Joshi and Raeside, 1973 ;Morat et al, 1980 ;Booth, 1980Booth, , 1983Lauwers et al, 1981).…”

Section: Introductionmentioning

confidence: 99%

Effects of age and live weight on fat 5α-androstenone levels in young boars fed two planes of nutrition

Bonneau¹,

Conseil²,

Giovanni³

et al. 1987

Reprod. Nutr. Dévelop.

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Summary. The aim of the present experiment was to determine whether age, live weight, or a combination of both, was the most important factor influencing fat 5a-androstenone levels in male pigs. Partial correlations between fat 5a-androstenone and age were significant at the first biopsy, whereas partial correlations with live weight were significant at all three times of measurement. In SA boars weighing 90 kg there was a significant correlation between fat 5a-androstenone and all the developmental traits of the genital tract. In SW and CTRL pigs weighing 125 kg, fat 5a-androstenone was significantly correlated with accessory sex gland development but not with testis or epididymis weight.From the present data it is concluded that both age and live weight had a significant effect on fat 5a-androstenone levels in young, light boars. In older, heavier boars, age had no effect per se but live weight still had a significant influence on 5a-androstenone concentrations. In boars weighing 90 kg, fat 5a-androstenone level depended on sexual maturity. When the animals were sexually mature at 125 kg of live weight, 5a-androstenone level depended on the individual's potentiality for steroid production, which is probably under genetic control.Introduction.

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“…Cervix weight and length increased (P < 0.01) to a lesser extent ( x 1.4 and x 1.2, respectively) after puberty. (Joshi and Raeside, 1973 ;Morat et al 1980 ;Booth, 1980Booth, , 1983Lauwers et al, 1981) and undernutrition is known to reduce androgen production (Dickerson et al, 1964 ;Bonneau, 1987 (1983). However, the growth performances in the study of Den Hartog and Noordewier (1984) were similar to ours, while in that of Etienne et al (1983) gilts fed ad libitum had a slower growth rate so that they were one month older at 125 kg of live weight.…”

mentioning

confidence: 99%

Effects of age and live weight on the sexual development of gilts and boars fed two planes of nutrition

Prunier¹,

Bonneau²,

Etienne³

1987

Reprod. Nutr. Dévelop.

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Summary. The Age had a significant influence on puberty attainment in gilts while live weight had nearly no effect. Percentages of cyclic gilts in the CTRL, SW and SA groups were 32, 79 and 20, respectively. Ovarian weight was mainly dependent on live weight in cyclic as well as in prepuberal gilts. In the latter animals, the weight and length of uterine horns and cervix were influenced by both age and live weight, whereas in cyclic gilts the only obvious effect was that of age on uterine horn weight. Season of birth (autumn vs spring) had no effect on the puberty attainment of gilts.Introduction.

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Development of some male characteristics supported by oestrone but not dehydroepiandrosterone in the boar

Cited by 20 publications

References 30 publications

Synthesis of free and sulphoconjugated 16-androstene steroids by the Leydig cells of the mature domestic boar

Synthesis of free and sulphoconjugated 16-androstene steroids by the Leydig cells of the mature domestic boar

Effects of age and live weight on fat 5α-androstenone levels in young boars fed two planes of nutrition

Effects of age and live weight on the sexual development of gilts and boars fed two planes of nutrition

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