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Identification of a potential FSH modulatory protein in human testis and seminal plasma
potential FSH modulatory protein human testis seminal plasma
2009/2/23
A variety of factors capable of inhibiting the in vitro binding of FSH to its receptor have been identified in gonadal tissues from males and females. Interest in these factors has been stimulated b...
Purification and characterization of a sperm motility inhibitor in human seminal plasma
sperm motility inhibitor human seminal plasma
2009/2/23
A sperm motility inhibitor from human seminal plasma was purified and characterized. The purification procedure includes dialysis, ion exchange chromatography on SP-Sephadex C-25 and adsorption chro...
Comparison between proteinases of human seminal plasma and of sperm origin
proteinases human seminal plasma sperm origin
2009/2/23
A comparison of the alkaline proteinase activity of human seminal plasma, the seminal non-gamete cellular material and spermatozoa was made by gelatin-sodium dodecyl sulfate-polyacrylamide gel elect...
Possible significance of transferrin levels in seminal plasma of fertile and infertile men
seminal transferrin FSH fertility man
2009/2/23
Human seminal plasma contains large amounts of transferrin, which is a protein secreted mostly by Sertoli cells. It has been suggested that the concentration of transferrin may serve as a possible c...
Similar biochemical properties of human seminal plasma and epididymal alpha-1,4-glucosidase
1-4 glucosidase seminal plasma epididymis
2009/2/20
We have studied some characteristics of alpha-1,4-glucosidases in human male reproductive organs in order to obtain information on the origin of the enzyme in seminal plasma. Acid and neutral enzyme...
Identification of arginine esterase as the major androgen-dependent protein secreted by dog prostate and preliminary molecular characterization in seminal plasma
arginine esterase dog prostate seminal
2009/2/20
This work was undertaken to determine the identity of the major androgen-dependent 15,000 molecular weight protein previously observed on SDS polyacrylamide gel electrophoresis of both dog prostate ...
Human and Ram Seminal Plasma Both Contain a Calcium-Dependent Regulator Protein
Spermatozoa initiation of motility Ca2+-dependent regulator Ca2+-ATPase epididymis
2009/2/19
Biochemical aspects of post-testicular sperm maturation have been studied. Partial purification of either human or ram seminal plasma yields a heat-stable, acidic protein which is a Ca2+-dependent...
Follicle-stimulating Hormone Receptor Binding Inhibitors in Human Seminal Plasma
FSH binding inhibition seminal plasma
2009/2/19
Human seminal plasma, freed of spermatozoa by centrifugation, inhibited binding of iodine-125 (125I)-hFSH to receptors in calf testes. Binding inhibition (BI) was seen in seminal plasma from intact ...
Disappearance of Inhibin-like Activity in Bull Seminal Plasma Following Castration
inhibin seminal plasma castration
2009/2/19
Ejaculates from normal and castrated bulls were evaluated for the presence of inhibin-like activity. Inhibin activity found in the seminal plasma of normal bulls became undetectable after castrati...
Concentrations of Immunoreactive Inhibin in Seminal Plasma and Serum from Normospermic, Oligospermic, Vasectomized, Klinefelter's Syndrome, and Sertoli-cell—only Syndrome Subjects
inhibin radioimmunoassay seminal plasma serum
2009/2/18
Semen samples and blood were collected from 57 men: 23 normospermic, 20 oligospermic, 10 vasectomized, two with Klinefelter's syndrome, and two with Sertoli-cell—only syndrome. Inhibin was measure...
Occurrence of DOPA/5-HTP Decarboxylase in Human Seminal Plasma：Kinetic Parameters and Demonstration of a Naturally Occurring Inhibitor of the Enzyme
DOPA/5-HTP decarboxylase human seminal plasma biogenic amines
2009/2/18
The authors found that DOPA/5-HTP decarboxylase was present in the human seminal plasma and that its activity was lower in fertile men than in infertile men. The Km and Vmax of the enzyme were, re...
Origin of an 84-kDa protein with ABH blood-typing antigen activity in human seminal plasma
p 84 ABO blood group substance lactotransferrin
2009/2/18
In order to investigate the origin of an 84-kDa protein with ABH blood-typing antigen activity (p 84) and its concentration in human seminal plasma, a monoclonal antibody (mAb p 84) was produced....
Modulation of insulin-like growth factor-1 in the seminal plasma of infertile men
Modulation insulin-like growth factor-1 seminal plasma infertile men
2009/2/18
It has been suggested that insulin-like growth factor (IGF)-1 plays an important role in the regulation of spermatogenesis in the testes. In the present study, concentrations of total IGF-1 we...
Protein kinase CK2 activities in human prostatic and seminal-vesicle secretions and seminal plasma
Prostate vasectomy normozoospermia oligozoospermia
2009/2/18
Human prostatic secretion and seminal plasma contain certain protein kinase activities. Protein kinases play important roles in regulating a vast variety of cellular functions. The objective of this...
Presence and modulation of interleukin-12 in seminal plasma of fertile and infertile men
Cytokines interleukins infertility semen
2009/2/17
Interleukin-12 (IL-12) is a unique cytokine that recently has drawn considerable attention because of its immunomodulatory properties and its possible involvement in several normal physiological a...