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Titolo:
ACTIVATION OF HAMSTER ZONA-FREE OOCYTES BY HOMOLOGOUS AND HETEROLOGOUS SPERMATOZOA
Autore:
MALESZEWSKI M; KLINE D; YANAGIMACHI R;
Indirizzi:
UNIV HAWAII,SCH MED,DEPT ANAT & REPROD BIOL HONOLULU HI 96822 KENT STATE UNIV,DEPT BIOL SCI KENT OH 44242 UNIV WARSAW,INST ZOOL,DEPT EMBRYOL WARSAW POLAND
Titolo Testata:
Journal of Reproduction and Fertility
fascicolo: 1, volume: 105, anno: 1995,
pagine: 99 - 107
SICI:
0022-4251(1995)105:1<99:AOHZOB>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
GUINEA-PIG SPERMATOZOA; REPETITIVE CALCIUM TRANSIENTS; FERTILIZING-CAPACITY; ACROSOME REACTION; GOLDEN-HAMSTER; MAMMALIAN EGGS; MOUSE EGGS; SPERM; PENETRATION; INVOLVEMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
M. Maleszewski et al., "ACTIVATION OF HAMSTER ZONA-FREE OOCYTES BY HOMOLOGOUS AND HETEROLOGOUS SPERMATOZOA", Journal of Reproduction and Fertility, 105(1), 1995, pp. 99-107

Abstract

Spermatozoa of a wide variety of species can fuse with zona-free hamster oocytes. Zona-tree hamster oocytes were inseminated with spermatozoa of homologous (hamster) and other (mouse, guinea-pig and human) species, and their responses were closely examined to determine whether such interspecific sperm-oocyte fusion always induces normal oocyte activation. While guinea-pig and human spermatozoa could activate hamsteroocytes as efficiently as hamster spermatozoa, mouse spermatozoa could not. Mouse spermatozoa fused readily with hamster oocytes, yet most oocytes remained inactivated at least during the first 1.5-2 h. The amount of M-phase (metaphase) promoting factor was reduced in hamster oocytes fused with one or several mouse spermatozoa; however, repetitiveCa2+ transients failed to occur unless oocytes were inseminated with a concentrated sperm suspension and penetrated by very many spermatozoa. These observations suggest that sperm-oocyte membrane fusion per seis not sufficient to trigger oocyte activation, and that putative sperm-derived oocyte activating factors show some degree of species specificity.

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Documento generato il 28/11/20 alle ore 00:56:56