[A study of quantitative dynamics of F-actin during oocyte maturation in the starfish Asterias amurensis].
We studied the actin cytoskeleton state in Asterias amurensis oocytes within 30 min after the 1-methyladenine-induced maturation until the germinal vesicle breakdown. The total amount of actin remained unchanged during oocyte maturation. In immature oocytes, the major part of actin is not a part of filaments, but in the presence of 1-methyladenine massive actin polymerization began already within 20 min. Electron immunocytochemistry methods demonstrated joint localization of actin and alpha-protein in the cytoplasm. They were redistributed from the cortex to the cytoplasm in the presence of 1-methyladenine. A possible involvement of actin cytoskeleton in transmembrane transduction of the hormonal signal at the postreceptor stages is discussed.
Lamash
N E
NE
Eliseĭkina
M G
MG
D000199:Actins / Q000502:physiology*; D000225:Adenine / Q000031:analogs & derivatives / Q000494:pharmacology; D000818:Animals; D003593:Cytoplasm / Q000502:physiology; D003599:Cytoskeleton / Q000187:drug effects / Q000502:physiology / Q000648:ultrastructure; D019206:GTP-Binding Protein alpha Subunits, Gi-Go / Q000378:metabolism; D007150:Immunohistochemistry; D008540:Meiosis; D016253:Microscopy, Immunoelectron; D009865:Oocytes / Q000187:drug effects / Q000502:physiology / Q000648:ultrastructure; D013215:Starfish / Q000502:physiology* / Q000648:ultrastructure
D000199:Actins; C008407:1-methyladenine; D019206:GTP-Binding Protein alpha Subunits, Gi-Go; D000225:Adenine