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A procedure is described which permits the isolation from the prepuberal mouse testis of highly purified populations of primitive type A spermatogonia, type A spermatogonia, type B spermatogonia, preleptotene primary spermatocytes, leptotene and zygotene primary spermatocytes, pachytene primary spermatocytes and Sertoli cells. The successful isolation of(More)
Nectin-2 is a cell adhesion molecule encoded by a member of the poliovirus receptor gene family. This family consists of human, monkey, rat, and murine genes that are members of the immunoglobulin gene superfamily. Nectin-2 is a component of cell-cell adherens junctions and interacts with l-afadin, an F-actin-binding protein. Disruption of both alleles of(More)
There is pharmacological evidence that Ca2+ channels play an essential role in triggering the mammalian sperm acrosome reaction, an exocytotic process required for sperm to fertilize the egg. Spermatozoa are small terminally differentiated cells that are difficult to study by conventional electrophysiological techniques. To identify the members of the(More)
Four monoclonal antibodies have been produced that recognize surface molecules of the guinea pig sperm. Each antibody binds to a unique, localized region of the sperm surface. The four antibody-binding patterns are restricted to the anterior head, of the sperm, the posterior head, the whole head and the posterior tail. Based on absorption experiments, the(More)
In somatic cells the level of myc transcription is not restricted to particular cell types but correlates closely with the rate of cell division. Such transcription involves the use of two active myc promoters and produces two messenger RNA species that are differentially represented among the transcripts of different tissues. In apparent contrast to(More)
The temporal expression of cell surface antigens during mammalian spermatogenesis has been investigated using isolated populations of mouse germ cells. Spermatogenic cells at advanced stages of differentiation, including pachytene primary spermatocytes, round spermatids, and residual bodies of Regaud and mature spermatozoa, contain common antigenic membrane(More)
A mitogenic polypeptide, previously identified in Sertoli cells of the prepuberal mouse (Feig, L. A., A. R. Bellvé, N. Horbach-Erickson, and M. Klagsbrun, 1980, Proc. Natl. Acad. Sci. USA., 77:4774-4778), now has been shown to exist in Sertoli cells of the adult mouse and in the seminiferous epithelium of several other mammalian species, including the rat,(More)
Expression of the Lactate Dehydrogenase (LDH) genes during various stages of spermatogenesis was studied by using a combination of Northern blot analyses and in situ hybridization techniques. These studies have indicated that developmentally programmed expression of all three functional LDH genes occurs during differentiation of germ cells. The LDH/C(More)
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