Cumulus cell processes remaining in the zona pellucida of mouse oocytes mechanically isolated from the ovary have been indirectly visualized by labeling their actin microfilament core with rhodaminyl-phalloidin. If the isolation of the oocytes is performed in Ca2+-free medium, the presence of such processes allows the entry into the cell of low molecular weight molecules (such as 5-6 carboxyfluorescein) and contributes to the death of the cell in such experimental conditions. Following dissolution of the zona pellucida (by enzymatic or acidic treatment) the oocyte is no longer permeable to small molecules and becomes resistant to Ca2+-free medium, probably as a consequence of the collapse of cumulus cell processes. The role of cumulus cell processes and gap junctions in the permeability of mechanically isolated ovarian oocytes is discussed.

DE FELICI, M., DOLCI IANNINI, S., Siracusa, G. (1989). Influence of cumulus cell processes on oolemma permeability and lethality of isolated mouse oocytes cultured in Ca2+-free medium. GAMETE RESEARCH, 23(3), 245-253 [10.1002/mrd.1120230302].

Influence of cumulus cell processes on oolemma permeability and lethality of isolated mouse oocytes cultured in Ca2+-free medium

DE FELICI, MASSIMO;DOLCI IANNINI, SUSANNA;SIRACUSA, GREGORIO
1989-07-01

Abstract

Cumulus cell processes remaining in the zona pellucida of mouse oocytes mechanically isolated from the ovary have been indirectly visualized by labeling their actin microfilament core with rhodaminyl-phalloidin. If the isolation of the oocytes is performed in Ca2+-free medium, the presence of such processes allows the entry into the cell of low molecular weight molecules (such as 5-6 carboxyfluorescein) and contributes to the death of the cell in such experimental conditions. Following dissolution of the zona pellucida (by enzymatic or acidic treatment) the oocyte is no longer permeable to small molecules and becomes resistant to Ca2+-free medium, probably as a consequence of the collapse of cumulus cell processes. The role of cumulus cell processes and gap junctions in the permeability of mechanically isolated ovarian oocytes is discussed.
lug-1989
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/17 - ISTOLOGIA
English
Con Impact Factor ISI
Animals; Zona Pellucida; Calcium; Fluoresceins; Mice; Cell Survival; Cells, Cultured; Peptides, Cyclic; Ovarian Follicle; Actins; Oocytes; Rhodamines; Cell Membrane Permeability; Actin Cytoskeleton; Female
DE FELICI, M., DOLCI IANNINI, S., Siracusa, G. (1989). Influence of cumulus cell processes on oolemma permeability and lethality of isolated mouse oocytes cultured in Ca2+-free medium. GAMETE RESEARCH, 23(3), 245-253 [10.1002/mrd.1120230302].
DE FELICI, M; DOLCI IANNINI, S; Siracusa, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/66290
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