Studies on Regional Fine Structure and Function in the Rabbit Epididymis

Autor:	Lennart Nicander, L. Plöen
Rok vydání:	1979
Předmět:	Urology Endocrinology Diabetes and Metabolism Pinocytosis Anatomy Vacuole Merocrine Golgi apparatus Biology Epididymis symbols.namesake medicine.anatomical_structure Secretory protein Reproductive Medicine medicine Cytochemistry symbols Micropinocytosis
Zdroj:	International Journal of Andrology. 2:463-481
ISSN:	1365-2605 0105-6263
DOI:	10.1111/j.1365-2605.1979.tb00078.x
Popis:	The regional fine structure of principal cells in the rabbit epididymal duct is described. Pinocytotic markers and enzyme cytochemistry were used to study pinocytotic mechanisms. Three main segments were defined. The initial segment showed selective micropinocytosis with transfer of surface membrane into large multivesicular bodies. The middle segment showed profuse pinocytosis of opaque material in the lumen and of the pinocytotic markers, and abundant lysosomes. The terminal segment showed some micropinocytosis only with small multivesicular bodies. Iron dextrin only was taken up. There was some evidence of micro-merocrine protein secretion in the initial segment, but most of the lumenal materials was taken up again in the proximal part of the middle segment. Small vacuoles appeared to form from the Golgi complex in the other segments, too. The possibility is suggested that these vacuoles may represent merocrine secretory vacuoles in all principal cells of the epididymis. Morphological sperm maturation is completed in the proximal half of the middle segment, functional maturation in the proximal third of the terminal segment.
Databáze:	OpenAIRE
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