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Ultrastructural and cytochemical studies on extranucleolar bodies in rat oocytes at the preovulatory follicle stage.
Antoine, Nadine; Thiry, Marc; Goessens, Guy
1989In Biology of the Cell, 65 (1), p. 61-6
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Keywords :
Animals; Chorionic Gonadotropin/pharmacology; Female; Follicle Stimulating Hormone/pharmacology; Microscopy, Electron; Oocytes/cytology/drug effects/ultrastructure; Organelles/ultrastructure; Rats; Rats, Inbred Strains; Staining and Labeling
Abstract :
[en] At the antral follicle stage, the nucleolus is entirely composed of a homogeneous proteinic compact mass. This nucleolar compaction during oogenesis seems to be a general feature in mammalian oocytes. However, when oocyte maturation is induced by gonadotropin hormone (LH), oocytes enter into preovulatory stage. All the nucleoli are vacuolated and extranucleolar bodies appear in the germinal vesicle near the nucleolar mass. Based on the results obtained by ultrastructural cytochemical stainings, we postulate that these extranucleolar bodies originate from the nucleolar mass itself. The presence of the extranucleolar bodies could reflect the extrusion of nucleolar material, essentially ribonucleoproteins, into the ooplasm. This material could persist after fertilization in the pronuclei until the resumption of transcription at the early stage of embryogenesis.
Disciplines :
Zoology
Anatomy (cytology, histology, embryology...) & physiology
Author, co-author :
Antoine, Nadine ;  Université de Liège - ULiège > Département de morphologie et pathologie > Histologie
Thiry, Marc  ;  Université de Liège - ULiège > Département des sciences de la vie > Biologie cellulaire
Goessens, Guy ;  Université de Liège - ULiège > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences)
Language :
English
Title :
Ultrastructural and cytochemical studies on extranucleolar bodies in rat oocytes at the preovulatory follicle stage.
Publication date :
1989
Journal title :
Biology of the Cell
ISSN :
0248-4900
eISSN :
1768-322X
Publisher :
Portland Press, Colchester, United Kingdom
Volume :
65
Issue :
1
Pages :
61-6
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 25 November 2009

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