Flagellar hyperactivation of bull and boar spermatozoa
نویسندگان
چکیده
منابع مشابه
Electrical control of flagellar activity in impaled bull spermatozoa.
The control of bull spermatozoon flagellar activity has been investigated using direct current injection into the cells through an impaling glass microelectrode. Negative current injection results in a decrease in the flagellar frequency. Flagellar frequencies can be decreased to zero with high negative currents. This current injection response is dependent on the magnesium concentration availa...
متن کاملBiochemical and immunochemical characterization of boar sperm flagellar protein with role in hyperactivation/capacitation process.
Investigations on specific and functionally active sperm antigens could bring about the elucidation of the mechanisms of gamete interaction and help the search for new approaches in prognosis and regulation of fertility. Previously, we reported that the monoclonal antibody (Mab) 3G4 against capacitated boar spermatozoa was capable of inhibiting boar sperm-porcine zona pellucida binding due to i...
متن کاملChanges in flagellar bending during the course of hyperactivation in hamster spermatozoa.
The motility pattern of mammalian spermatozoa changes during migration in the female genital tract and during incubation in vitro. This change in motility is termed hyperactivation. Hyperactivated spermatozoa swim vigorously in 'whiplash', 'figure-8' or 'small circle' trajectories. In this study, a quantitative analysis was carried out of the changes in the motility pattern of hamster spermatoz...
متن کاملEffects of HSPA8, an evolutionarily conserved oviductal protein, on boar and bull spermatozoa.
Previous studies have shown that a soluble protein fraction derived from preparations of apical plasma membrane (APM) of the oviductal epithelium enhances the in vitro survival of mammalian spermatozoa. Here, we show that the survival enhancing property of the soluble protein fraction seems to depend significantly upon heat shock 70 kDa protein 8 (HSPA8 previously known as HSPA10). The followin...
متن کاملThe effect of ouabain on membrane potential and flagellar wave in ejaculated bull spermatozoa.
Ejaculated bull spermatozoa were exposed to various concentrations of ouabain to ascertain the effect on membrane potential, intracellular concentrations of sodium and potassium and motility. Membrane potenital, measured by electrophysiological methods, decreased. Intracellular potassium decreased and intracellular sodium increased. Progressive motility decreased. In addition, the motility chan...
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ژورنال
عنوان ژورنال: Reproductive Medicine and Biology
سال: 2018
ISSN: 1445-5781
DOI: 10.1002/rmb2.12227