Prevention of Coagulation in Monkey Semen by Surgery

Greer, W. E.; Roussel, J.D.; Austin, C. R.

doi:10.1530/jrf.0.0150153

Cited by 17 publications

(10 citation statements)

References 1 publication

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“…One important chemical secreted by the prostate gland is vesiculase, an enzyme which mixes with proteins (semenogelins) produced by the seminal vesicles to cause semen to coagulate once ejaculation has occurred. The cranial lobe of the prostate plays a crucial role in this process; its removal (in the rhesus monkey) prevents the coagulation of semen [Greer et al, 1968]. None of the primates for which adequate information exists exhibits complete absence of coagulation.…”

Section: The Male Accessory Reproductive Glands and Ductsmentioning

confidence: 99%

Copulatory and Postcopulatory Sexual Selection in Primates

Dixson¹

2018

IJFP

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Many aspects of primate reproductive anatomy and physiology have been influenced by copulatory and postcopulatory sexual selection, especially so in taxa where multiple-partner matings by females result in the sperm of rival males competing for access to a given set of ova (sperm competition). However, the female reproductive system also exerts profound effects upon sperm survival, storage and transport, raising the possibility that female traits influence male reproductive success (via cryptic female choice). Current knowledge of sperm competition and cryptic choice in primates and other mammals is reviewed here. The relevance of these comparative studies to our understanding of human reproduction and evolution is discussed.

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Section: The Male Accessory Reproductive Glands and Ductsmentioning

confidence: 99%

Copulatory and Postcopulatory Sexual Selection in Primates

Dixson¹

2018

IJFP

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“…The seminal vesicles secrete the bulk of the fluid in which spermatozoa are suspended at ejaculation [12,13]. They also secrete a large number of chemical constituents, including proteins which interact with a prostatic enzyme (vesiculase) to cause seminal coagulation immediately after ejaculation [14][15][16]. In some cases a soft coagulum is formed (e.g.…”

Section: Introductionmentioning

confidence: 99%

Sexual Selection, Seminal Coagulation and Copulatory Plug Formation in Primates

Dixson¹,

Anderson²

2002

IJFP

133

107

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This study examines the question of whether multipartner matings by female primates, with resulting sperm competition among males, may have favored the evolution of biochemical mechanisms to enhance seminal coagulationand copulatory plug formation. Comparative ratings of seminal coagulation (using a four-point scale where 1 = no coagulation and 4 = copulatory plug formation) were obtained for 40 species representing 26 primate genera. Coagulation ratings were highest (mean = 3.64) in those genera where females commonly mate with multiple partners, and lowest (mean = 2.09) in genera where females are primarily monogamous or belong to polygynous (one male) units(p < 0.0001). This result remained significant (p < 0.001) after the use of comparative analysis of independent contrasts (CAIC) to control for possible phylogenetic biases in the data set. Results indicate that sexual selection has played an important role in the evolution of seminal coagulation, and copulatory plug function, in primates.

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“…The liquefaction of the gel is due to proteolytic degradation of the semenogelins (Sg) by the prostate-secreted protein prostatespecific antigen (PSA; Lilja, 1988). Semen from the rhesus monkey forms a firm gel when fluid from the seminal vesicles is mixed with secretions from the cranial lobe of the prostate (Greer, 1968;van Wagenen, 1936). The liquefaction process seen in man is not observed in the rhesus monkey; instead the spermatozoa are believed to be released by an exudation process that is completed within 40 min (van Pelt and Keyser, 1970).…”

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confidence: 99%

Cloning of the Semenogelin II Gene of the Rhesus Monkey

Ulvsbäck

Lundwall

1997

European Journal of Biochemistry

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The semenogelin I1 gene from the rhesus monkey has been cloned and characterized. The transcription unit is split into three exons of 97, 2086 and 124 bp, with two intervening introns of 241 bp and 862 bp. The first exon codes for a 23-amino-acid signal peptide and the two amino-terminal residues of the secreted protein. The second exon codes for the rest of the mature protein, and the third exon contains non-coding nucleotides only. Secreted rhesus monkey seinenogelin I1 consists of 683 amino acid residues, has a calculated Mr of 77362, is devoid of Cys and Met, and displays a highly repetitive structure composed of ten 60-amino-acid repeats. Hybridization with genomic DNA showed that the semenogelin I1 gene of man, rhesus monkey and baboon has evolved through extension of the coding region with 360-bp segments. In contrast, the length of the semenogelin I gene of these species appears to be conserved.The two genes are also present in some New World monkeys, as was revealed by hybridization with genomic DNA from the marmoset. However, another New World monkey, the cotton-top tamarin, carries only one semenogelin gene, but also has a gene that is similar to the mouse semenoclotin gene.Keywords: semen ; transglutaminase; evolution ; coagulation ; primate.Semen is composed of secretions from the accessory sex glands and epididymal spermatozoa. Newly ejaculated human semen has the structure of a loose gel which liquefies within 5-20 min to release the entrapped spermatozoa. The major gelforming proteins are the closely related semenogelin I and I1 (SgI, SgII), primarily expressed in the seminal vesicles (Lilja and Laurel], 1984;Lilja et al., 1989;Lilja and Lundwall, 1992). The liquefaction of the gel is due to proteolytic degradation of the semenogelins (Sg) by the prostate-secreted protein prostatespecific antigen (PSA;Lilja, 1988). Semen from the rhesus monkey forms a firm gel when fluid from the seminal vesicles is mixed with secretions from the cranial lobe of the prostate (Greer, 1968;van Wagenen, 1936). The liquefaction process seen in man is not observed in the rhesus monkey; instead the spermatozoa are believed to be released by an exudation process that is completed within 40 min (van Pelt and Keyser, 1970). Little is known about the proteins constituting the gel in the rhesus monkey, although immunoreactive material recognized by antibodies raised against human SgI has been found in the seminal vesicles and in the vas deferens (Aumuller et al., 1990).It was recently shown that the genes encoding Sg and other predominant proteins secreted by the seminal vesicles, together with the gene encoding the protease inhibitor skin-derived antileukoproteinase/elafin, constitute a gene family (Lundwall and Lazure, 1995 ;Lundwall, 1996a;Lundwall and Ulvsback, 1996). The genes belonging to this family consist of a characteristic University Hospital, Malmo, S-205 02 Malmo, Sweden three-exon transcription unit in which the nucleotide sequences in the first and the last exon are conserved, whereas the second exon is diss...

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Prevention of Coagulation in Monkey Semen by Surgery

Cited by 17 publications

References 1 publication

Copulatory and Postcopulatory Sexual Selection in Primates

Copulatory and Postcopulatory Sexual Selection in Primates

Sexual Selection, Seminal Coagulation and Copulatory Plug Formation in Primates

Cloning of the Semenogelin II Gene of the Rhesus Monkey

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