Pyriform cell differentiation in Podarcis sicula is accompanied by the appearance of surface glycoproteins bearing alpha-galNAc terminated chains

The Anatomical Record
P AndreuccettiM Prisco

Abstract

The present histochemical and cytochemical study using a lectin panel (WGA, GSI-A4, GSI-B4, PSA UEA-I, PNA, LCA, Con-A, DBA, MPA, BPA) has demonstrated that, in Podarcis sicula, the differentiation of small follicle cells into pyriform cells by means of intermediate cells is accompanied by the appearance of glycoproteins bearing alpha-GalNAc terminated O-linked side chains on the cell surface. The distribution of DBA- and MPA-binding sites over the follicular epithelium changed during the different stages of oocyte growth. DBA- and MPA-binding sites first appeared at the beginning of folliculogenesis within the zona pellucida (ZP) and on the surface of small cells, i.e., the stem cells of pyriform cells. Afterward, labeling was evident on the cell surfaces of intermediate cells and, later on, also of pyriform cells. On the other hand, no labeling was detected on the small cells located under the basal lamina, which, reportedly, do not differentiate into pyriform cells (Filosa et al. J. Embryol. Exp. Morphol., 1979; 15:297-316). Once pyriform cells were differentiated, the distribution of DBA- and MPA-binding sites over the follicular epithelium remained unchanged until intermediate and pyriform cells underwent apoptosis (Motta ...Continue Reading

References

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Citations

Oct 15, 2009·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·Franca Raucci, Maria Maddalena Di Fiore
Jan 27, 2010·Journal of Morphology·Simón VieiraMartha Patricia Ramírez-Pinilla
Jul 11, 2008·Biology of Reproduction·Ellen Menkhorst, Lynne Selwood
Dec 4, 2003·Molecular Reproduction and Development·Loredana RicchiariAndreuccetti Piero

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