A Comparative Overview of Mammalian Fertilization by J. Michael Bedford (auth.), Bonnie S. Dunbar, Michael G. PDF

By J. Michael Bedford (auth.), Bonnie S. Dunbar, Michael G. O’Rand (eds.)

ISBN-10: 1475789823

ISBN-13: 9781475789829

ISBN-10: 147578984X

ISBN-13: 9781475789843

In 1964, the Fertilization and Gamete body structure learn education application (FERGAP) used to be verified on the Marine organic Laboratories, Woods gap, Massachusetts. Over the process the subsequent 12 years, below the directorship of Dr. Charles B. Metz, FERGAP introduced jointly, proficient, and encouraged a iteration of scholars in reproductive biology from around the globe. As scholars of C. B. Metz and as FERGAP trainees, we want to devote this gathered paintings on comparative mammalian fertilization to our instructor and mentor, Dr. Charles B. Metz. Like a few authors contributing to this quantity, we've been struck by means of the numerous influence that C. B. Metz and FERGAP had at the improvement of scholars of reproductive biology. using either the classical and molecular innovations of mobile biology and immunology to difficulties of gamete biology, Dr. Metz emphasised a comparative and analytical method that was once mirrored in his personal examine on fertilization in Paramecia, sea urchins, frogs, and mammals. it really is was hoping that this quantity will serve to stimulate scholars to find the myriad of interesting study difficulties in gamete and reproductive biology. Bonnie S. Dunbar Michael G. O'Rand Houston, Texas Chapel Hill, North Carolina ix Contents half I COMPARATIVE evaluate OF MAMMALIAN GAMETES The Coevolution of Mammalian Gametes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . three J. Michael Bedford I. creation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . three 2. Gamete layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . four 2.1. Monotremes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . five . . . . . . . . . . . . . . 2.2. Marsupials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . five . . . . . . . . . . . . . . . 2.3. Eutherians . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . nine three. Gamete Maturation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 . . . . . . . . . . . . . . . three .1. Oocyte Maturation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 . . . . . . . . . . . . . 3.2. Sperm Maturation within the Male . . . . . . . . . . . . . . . . . . . . . . . 15 . . . . . . . . . .

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1986; Florman and First, 1988). The fact that they will react to cumulus oophorus also is evident in spermatozoa moving within it (Austin, 1960) and in those in cumulus fixed for electron microscopy soon after collection from oviducts (Bedford, 1972; Yanagimachi and Phillips, 1984). In contemplating why there should be a need for capacitation before an acrosome reaction can occur in response to the egg, there are good reasons now to focus on the system of sperm storage in the cauda epididymidis.

1976). 5 hr after tubal insemination, upper corpus spermatozoa had developed the immediate ability to fertilize whereas potentially fertile spermatozoa from the cauda epididymidis, had not. support for the concept. Knowing that body temperature suppresses some of the proteins in cauda fluid (Esponda and Bedford, 1986), we studied hamster spermatozoa from the cauda reflected to the abdomen. Such spermatozoa undergo hyperactivation and the acrosome reaction sooner in vitro and fertilize sooner in vitro and in vivo (Bedford and Yanagimachi, 1991).

It must be appreciated that the molecular details of capacitation almost certainly vary among species. Moreover, the determinants of this probably are not confined only to the caudal region. The ability of maturing rat epididymal spermatozoa to bind HIS protein depends on a change that takes place more proximally in the corpus epididymidis (Rifkin and Olson, 1985), the site of ASF acquisition by the rabbit sperm. 4. GAMETE INTERACTION The cytology of fertilization was established more than 100 years ago by Hertwig, Van Beneden, and then Boveri and others (see Lilli, 1919; Austin and Walton, 1960).

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A Comparative Overview of Mammalian Fertilization by J. Michael Bedford (auth.), Bonnie S. Dunbar, Michael G. O’Rand (eds.)


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