Studies on Properties of the Seminal Gel of the Boar Using Natural Gel and Gel Formed in Vitro

Boursnell, J. C.; Butler, E.J.

doi:10.1530/jrf.0.0340457

Cited by 9 publications

(2 citation statements)

References 4 publications

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“…GC-MS analysis of components in seminal gel secreted with boar semen has been done with respect to composition (Boursnell et al, 1970; Boursnell and Butler, 1973) only. It needs further exploration and validation for active ingredients having biostimulatory effect in pig.…”

Section: Discussionmentioning

confidence: 99%

Mass spectrometric analysis and biostimulatory effects of boar seminal gel, saliva and semen in pigs

Kumar

Islam

Chanda

et al. 2023

Preprint

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The present study aimed to identify novel biostimulatory compounds in boar seminal gel (SG), saliva and semen using Gas chromatography-mass spectrometry (GC-MS). SG alone and its combined application with saliva (SG+saliva) and semen (SG+semen) also studied to train young boars. SG alone and SG+Saliva investigated for estrus induction in gilts and sows. Distilled water (DW) exposure was kept as control. SG, saliva and semen screened for total 105, 96 and 89 compounds. The highest concentration was of alkanes followed by sugar alcohols, then hydrocarbons, amino acids and fatty acids. Elaidic acid is the novel compound identified in pigs. Other compounds were tridecenol, undecane, hexadecone, eicosane, tetracosane etc. Further, young males (64.86%) were able to get trained. Significant higher (p<0.05) number of males got trained in exposure to SG (80%), SG+saliva (75%) and SG+semen (75%) than control. The time (hrs) taken by young boars to get trained on exposure to combination of SG+saliva (244±22.19) and SG+semen (216±13.14) was lesser (p<0.05) than SG (356±61.85) alone. Interval (hrs) for exhibition of different sexual behaviour by males on exposure to SG, saliva and semen was lesser (p<0.05) than control. Estrus was induced in 61.25% of females. Significant (p<0.05) higher number of females showed estrus response to exposure of SG (72.72%) and SG+saliva (69.23%) than control. Interval taken to exhibit estrus was lesser (p<0.05) in females exposed to SG+saliva (201.88±12.66) than SG (262.14±20.06) alone. Interval (hrs) for exhibition of different sexual behaviour by females on exposure to SG+saliva was lesser (p<0.05) than control. In conclusion, novel compounds with biostimulatory properties have been identified in boar SG, saliva and semen. The combined exposure of SG with saliva and semen have more intense biostimulation effect than SG alone. Such compounds and biostimulatory effects can be exploited for augmenting reproductive efficiency in pigs.

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Section: Discussionmentioning

confidence: 99%

Mass spectrometric analysis and biostimulatory effects of boar seminal gel, saliva and semen in pigs

Kumar

Islam

Chanda

et al. 2023

Preprint

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“…The diversion of energy to maintain such a large mass of bulbourethral glands suggests a positive rather than neutral contribution of these glands in the boar, presumably more than lubrication. Gel particles containing zinc-binding proteins could function to swab the ejaculatory pathway [3]. The small amount of gel in the initial fraction of semen might cleanse this path prior to the ejaculation of the sperm-rich fraction.…”

Section: Introductionmentioning

confidence: 99%

Gene Expression in Porcine Bulbourethral Glands

Noto,

Nitta-Oda,

Berger

2024

Animals

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The porcine bulbourethral glands produce a gel-type secretion. Although the role of these contributions to reproductive success remains murky, the bulbourethral glands are major accessory sex glands in this species. Isometric growth in the early neonatal interval is followed by allometric growth in the late juvenile interval (6 to 11 weeks of age), while circulating endogenous steroids are low. The rate of allometric growth increases during the peripuberal interval (16 to 20 weeks of age) when systemic testosterone is relatively high. Gene expression for androgen receptor (AR) and for the steroid 5 alpha-reductase 2 (SRD5A2) enzyme that synthesizes the more potent androgen dihydrotestosterone from its precursor was evaluated by qPCR analyses of bulbourethral gland tissue. Tissues were collected from control boars (2 weeks to 40 weeks of age) and from littermates of these boars treated with letrozole to suppress endogenous estrogen synthesis. Gene expression for these two key proteins in androgen signaling was quite low during the initial allometric growth in the late juvenile and prepuberal intervals, suggesting that this initial growth was not primarily stimulated by androgens. These observations are consistent with a more direct estrogen-mediated inhibition of growth via GPER previously proposed, with the sensitivity extending into the late juvenile interval when estrogens as well as androgens are normally relatively low.

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