Fractal analysis of capacitating human spermatozoa
نویسندگان
چکیده
منابع مشابه
In vitro capacitating effect of gamma-aminobutyric acid in ram spermatozoa.
We have evaluated the capacitating effect of gamma-aminobutyric acid (GABA) in ram spermatozoa in vitro, in a chemically defined medium, by means of the chlortetracycline (CTC) binding assay. Semen from adult Australian Merino rams was collected in an artificial vagina; spermatozoa were washed once in modified Biggers, Whitten, and Wittingham medium (m-BWW), without BSA or serum, and incubated ...
متن کاملA novel signal transduction cascade in capacitating human spermatozoa characterised by a redox-regulated, cAMP-mediated induction of tyrosine phosphorylation.
Capacitation is a priming event that renders mammalian spermatozoa responsive to signals originating from the cumulus-oocyte complex. The attainment of a capacitated state is dependent upon an increase in tyrosine phosphorylation and results in the acquisition of responsiveness to physiological agonists such as progesterone and ZP3. In this study we have shown that this capacitation-dependent i...
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Phosphorylation of tyrosine residues on sperm proteins is one important intracellular mechanism regulating sperm function that may be a meaningful indicator of capacitation. There is substantial evidence that cryopreservation promotes the capacitation of sperm and this cryocapacitation is frequently cited as one factor associated with the reduced longevity of cryopreserved sperm in the female r...
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The study of human dynamics has attracted much interest from many fields recently. In this paper, the fractal characteristic of human behaviors is investigated from the perspective of time series constructed with the amount of library loans. The Hurst exponents and length of non-periodic cycles calculated through Rescaled Range Analysis indicate that the time series of human behaviors is fracta...
متن کاملAnalysis of chaperone proteins associated with human spermatozoa during capacitation.
Mammalian spermatozoa must undergo a post-ejaculatory period of maturation, known as capacitation, before they can engage in the process of fertilization. Studies in the mouse have established that capacitation facilitates sperm-zona recognition via mechanisms that involve the appearance of tyrosine phosphorylated chaperone proteins on the sperm surface overlying the acrosome, the site of sperm...
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ژورنال
عنوان ژورنال: Human Reproduction
سال: 1996
ISSN: 0268-1161,1460-2350
DOI: 10.1093/oxfordjournals.humrep.a019295