The Chromatoid Body in Spermatogenesis: Nucleo-Cytoplasmic Transport of Haploid Gene Products and Its Cytoskeletal Regulation
All cells of the germ line are characterized by specific cytoplasmic components, germ cell determinants, that are called polar granules in insects, germinal plasm in amphibians and nuage in mammals (Beams and Kessel, 1974). The chromatoid body is a germ cell determinant; it is characteristic for mammalian spermatocytes and spermatids (Eddy, 1974; Söderström, 1981, for review, see Sud, 1961). In early spermatids, it is a lobulated cytoplasmic structure with l–2µm in diameter (Figure 1). During the first appearance of the chromatoid material in mid-pachytene spermatocytes (Russell and Frank, 1978; Head and Kresge, 1985), it is often seen to be intimately associated with mitochondria (Fawcett et al., 1970). During early spermiogenesis, the chromatoid body is located on the surface of the nucleus close to the Golgi complex and the developing acrosome (Susi and Clermont, 1970). During this period, two cytochemically distinct compartments of the Golgi cortex, characterized by acid phosphatases, nicotinamide adenine dinucleotide phosphatase (NADPase) and cytidine mono-phosphatase (CMPase), independently contribute to the formation of the vesicular component of the chromatoid body (Thorne-Tjomsland et al., 1988). Towards the end of spermiogenesis, the chromatoid body diminishes in size and is found in the region of the developing flagellum. It becomes separated from the spermatozoon at spermiation in the residual body.
KeywordsAlbumin Polysaccharide Germinal Bicarbonate Hepes
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- Dadoune J.-P., Alfonsi M.-F., and Fain-Maurel M.-A. 1987, Marquage ultrastructural du corps Chromatide et du corps associé au centriole a l’aide du complexe DNase-or colloidal dans les spermatides de singe. C. R. Acad. Sci., 305:135.Google Scholar
- Mali P., Fagerhed R.-M., and Parvinen M. 1987, Cytoskeletal regulation of the chromatoid body. In: ‘Development and Function of the Reproductive Organs’, Serono Symposia Review no 14, M. Parvinen, I. Huhtaniemi, and L. J. Pelliniemi, eds., Ares Serono Symposia, Rome, Italy, p. 317.Google Scholar
- Paniagua R., Nistal M., Amat P., and Rodriguez M. C. 1985, Presence of ribonucleoproteins and basic proteins in the nuage and intermitochondrial bars of human spermatogonia. J. Anat., 143:201.Google Scholar
- Söderström K.-O. 1977, Effect of actinomycin D on the structure of the chromatoid body in the rat spermatids. Cell Tiss. Res., 184:411.Google Scholar
- Söderström K.-O. 1981, The relationship between the nuage and the chromatoid body during spermatogenesis in the rat. Cell Tiss. Res., 215:425.Google Scholar
- Sud B. N. 1961, The ‘chromatoid body’ in spermatogenesis. Quart. J. Micr. Sci., 102:273.Google Scholar
- Walt H., and Armbruster B. L. 1984, Actin and RNA are components of the chromatoid bodies in spermatids of the rat. Cell Tiss. Res., 236:487.Google Scholar