Seven rhodamine-conjugated lectins were utilized to study the distribution of glycoproteins in the developing rat testis and epididymis. In the testis a clear developmental pattern was found in Ley dig cells and the cell boundaries between Sertoli and spermatogenic cells, as well as during acrosome formation. Some of the first degenerating meiotic cells and the apical extensions of the Sertoli cells at the time of spermiation also displayed a characteristic lectin binding. The epididymal differentiation was characterized by an increasing lectin binding of the subapical Golgi zone and apical surface, and intratubular secretion prior to the arrival of sperm. After the accumulation of tubular secretion and sperm some epithelial cells were transformed into narrow (initial segment) and light cells (distal caput, cauda) with a strong affinity for some lectins. These cells appeared to be responsible for the absorption and digestion of tubular material derived from the testis and of surplus secretion and/or sperm structures.

Keywords:
Rat, Testis, Epididymis, Lectin binding, Postnatal development
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© 1986 S. Karger AG, Basel
1986
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