Histochemical analysis of glycoconjugates in the domestic cat testis

• Autores: S. Desantis, G. Ventriglia, D. Zubani, M. Deflorio, P. Megalofonou, F. Acone, A. Zarrilli, G. Palmieri, Gregorio de Metrio
• Localización: Histology and histopathology: cellular and molecular biology, ISSN-e 1699-5848, ISSN 0213-3911, Vol. 21, Nº. 1, 2006, págs. 11-22
• Idioma: inglés
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  • Summary. The localization and characterization of oligosaccharide sequences in the cat testis was investigated using 12 lectins in combination with the ß-elimination reaction, N-Glycosidase F and sialidase digestion. Leydig cells expressed O-linked glycans with terminal alphaGalNAc (HPA reactivity) and N-glycans with terminal/internal aMan (Con A affinity). The basement membrane showed terminal Neu5Acalpha2,6Gal/GalNAc, Galß1,3GalNAc, alpha/ßGalNAc, and GlcNAc (SNA, PNA, HPA, SBA, GSA II reactivity) in O-linked oligo-saccharides, terminal Galß1,4GlcNAc (RCA120 staining) and alphaMan in N-linked oligosaccharides; in addition, terminal Neu5acalpha2,3Galß1,4GlcNac, Forssman pentasaccharide, alphaGal, alphaL-Fuc and internal GlcNAc (MAL II, DBA, GSA I-B4, UEA I, KOH-sialidase-WGA affinity) formed both O- and N-linked oligosaccharides. The Sertoli cells cytoplasm contained terminal Neu5Ac-Galß1,4GlcNAc, Neu5Ac-ßGalNAc as well as internal GlcNAc in O-linked glycans, alphaMan in N-linked glycoproteins and terminal Neu5Acalpha2,6Gal/GalNAc in both O- and N-linked oligosaccharides. Spermatogonia exhibited cytoplasmic N-linked glycoproteins with aMan residues. The spermatocytes cytoplasm expressed terminal Neu5acalpha2,3Galß1,4GlcNAc and Galß1,3GalNAc in O-linked oligo-saccharides, terminal Galß1,4GlcNAc and alpha/ßGalNAc in N-linked glycoconjugates. The Golgi region showed terminal Neu5acalpha2,3Galß1,4GlcNac, Galß1,4GlcNAc, Forssman pentasaccharide, and alphaGalNAc in O-linked oligosaccharides, alphaMan and terminal ßGal in N-linked oligosaccharides. The acrosomes of Golgi-phase spermatids expressed terminal Galß1,3GalNAc, Galß1,4GlcNAc, Forssmann pentasaccharide, alpha/ßGalNAc, alphaGal and internal GlcNAc in O-linked oligosaccharides, terminal alpha/ßGalNAc, alphaGal and terminal/internal alphaMan in N-linked glycoproteins. The acrosomes of cap-phase spermatids lacked internal Forssman pentasaccharide and alphaGal, while having increased alpha/ßGalNAc. The acrosomes of elongated spermatids did not show terminal Galß1,3GalNAc, displayed terminal Galß1,4GlcNAc and alpha/ßGalNAc in N-glycans and Neu5Ac-Galß1,3GalNAc in O-linked oligosaccharides. Histol Histopathol 21, 11-22 (2006)