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Relationship of human sperm acrosin and proacrosin to semen parameters. II. Correlations
human sperm acrosin semen parameters
2009/2/23
Previous results, simultaneously confirmed by others, suggest that a relationship exists between sperm acrosin levels and fertility in man. The assessment of sperm acrosin may therefore be a useful ...
Comparison of glycerol and a zwitter ion buffer system as cryoprotective media for human spermatozoa. Effect on motility, penetration of zona-free hamster oocytes, and acrosin/proacrosin
spermatozoa human cryopreservation
2009/2/20
This study compared the cryoprotective effect of glycerol with that of a zwitter ion buffer system (TESTCY). Spermatozoa that are cryopreserved in the presence of glycerol possess a somewhat highe...
Relationship of Human Sperm Acrosin and Proacrosin to Semen Parameters. I. Comparisons Between Symptomatic Men of Infertile Couples and Asymptomatic Men, and Between Different Split Ejaculate Fractions
acrosin proacrosin semen spermatozoa split ejaculate fertility infertility
2009/2/19
Acrosin is a sperm serine proteinase whose activity appears to be essential for fertilization in mammals, although this has not been shown in man due to experimental limitations. The present stu...
Glycosaminoglycan Stimulation of the In Vitro Conversion of Boar Proacrosin into Acrosin
acrosomal enzymes acrosome reaction proacrosin acrosin glycosaminoglycan
2009/2/18
Glycosaminoglycans obtained from shark cartilage, whale cartilage, porcine intestinal mucosa, porcine skin, and human umbilical cord were found to accelerate the in vitro conversion of highly puri...
Acrosin, Proacrosin, and Acrosin Inhibitor of Human Spermatozoa：Extraction, Quantitation, and Stability
acrosin proacrosin acrosin inhibitor human spermatozoa
2009/2/18
Ten different methods were evaluated to determine the treatment for obtaining maximal amounts of acrosin, proacrosin, and acrosin inhibitor (the acrosin system) from human spermatozoa by a single te...
Evidence of proacrosin molecule abnormality as a possible cause of low acrosin activity and unexplained failure of fertilization in vitro
Spermatozoa male infertility immunoblotting
2009/2/17
The aim of this study was to investigate whether the molecular abnormality of proacrosin is associated with an unexplained failure of in vitro fertilization (IVF) and low acrosin activity in human...
Proacrosin gene expression in rat spermatogenic cells
Testis sperm development meiosis acrosome germ
2009/2/12
Mammalian proacrosin gene expression was considered to be exclusively postmeiotic until recent studies detected the presence of proacrosin mRNA in mouse pachytene spermatocytes. To determine if rat ...
Biochemical alterations in the proacrosin-acrosin system during epididymal maturation of the rat spermatozoa
Biochemical alterations proacrosin-acrosin system epididymal maturation rat spermatozoa
2009/2/10
Acrosin, an acrosomal serine protease, is believed to have a role in fertilization. The enzyme is synthesized in an enzymatically inactive precursor form, proacrosin, and is processed to enzymatical...
In vitro interactions of calmodulin with the ovine proacrosin-acrosin system
acrosome spermatozoa proteolytic activity
2009/1/5
The authors studied the interaction of calmodulin (CaM) with proacrosin and acrosin from ram spermatozoa. CaM binding evaluated by the [125I]-CaM overlay procedure was shown to occur preferentially ...
The Proacrosin Binding Protein, sp32, Is Tyrosine Phosphorylated During Capacitation of Pig Sperm
Fertilization p32 acrosin acrosome reaction
2008/12/23
Mammalian sperm must undergo capacitation, a preparation period in the female reproductive tract or in vitro, in order to fertilize. We have previously described a Mr 32 000 tyrosine phosphorylated ...