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Biology of Reproduction, Vol 29, 479-486, Copyright © 1983 by Society for the Study of Reproduction

ARTICLES

Proacrosin and the differentiation of the spermatozoa

L Phi-Van, W Muller-Esterl, S Florke, M Schmid and W Engel

Using the indirect immunofluorescence staining technique, the occurrence and localization of proacrosin, the zymogen form of acrosin, was studied during spermatogenesis in the bull, ram, boar and rabbit. Proacrosin staining was demonstrable for the first time in the early haploid spermatid and increased with the differentiation of the spermatid to spermatozoon. The spermatozoon is covered by a cap-like structure of uniform fluorescence corresponding to the acrosomal compartment of the male gamete. No fluorescence could be found in diploid spermatogenic cells, i.e., in spermatogonia and spermatocytes. An identical developmental pattern of proacrosin was observed with the indirect immunoperoxidase staining technique. However, with this staining technique a distinct distribution of proacrosin staining was observed in the acrosome of epididymal and ejaculated spermatozoa of the bull, ram, boar, rabbit and man. Proacrosin seems to be distributed in the acrosome in granules rather than in the homogeneous form, as was indicated by the results of indirect immunofluorescence staining.


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A Sreekumar, K K Acharya, H S Lalitha, S S Indi, P Bali, and P B Seshagiri
Germ cell-specific localization of immunoreactive riboflavin carrier protein in the male golden hamster: appearance during spermatogenesis and role in sperm function
Reproduction, May 1, 2005; 129(5): 577 - 587.
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Copyright © 1983 by the Society for the Study of Reproduction.