Cargando…

Non-spindle microtubule organizing centers in metaphase II-arrested mouse oocytes

A human autoantiserum (5051) directed against pericentriolar material (PCM) was used to study the distribution of microtubule-organizing centers (MTOCs) in the oocyte and during the first cell cycle of mouse development. In oocytes, the PCM was found not only at the poles of the barrel-shaped metaph...

Descripción completa

Detalles Bibliográficos
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1985
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2113955/
https://www.ncbi.nlm.nih.gov/pubmed/2865266
_version_ 1782140306582405120
collection PubMed
description A human autoantiserum (5051) directed against pericentriolar material (PCM) was used to study the distribution of microtubule-organizing centers (MTOCs) in the oocyte and during the first cell cycle of mouse development. In oocytes, the PCM was found not only at the poles of the barrel-shaped metaphase II spindle but also at many discrete loci around the cytoplasm near the cell cortex. The spindle poles were also composed of several PCM foci. In metaphase-arrested eggs only the PCM foci located near the chromosomes acted as MTOCs. However, after reduction of the critical concentration for tubulin polymerization by taxol, the cytoplasmic PCM foci were also found to be associated with nucleation of microtubules. After fertilization the cortical PCM foci remained in a peripheral position until the end of the S phase, when they appeared to migrate centrally towards the pronuclei. At prometaphase of the first mitotic division, numerous MTOCs were found around the two sets of chromosomes; these MTOCs then aligned to form two bands on either side of the metaphase plate of the first mitosis.
format Text
id pubmed-2113955
institution National Center for Biotechnology Information
language English
publishDate 1985
publisher The Rockefeller University Press
record_format MEDLINE/PubMed
spelling pubmed-21139552008-05-01 Non-spindle microtubule organizing centers in metaphase II-arrested mouse oocytes J Cell Biol Articles A human autoantiserum (5051) directed against pericentriolar material (PCM) was used to study the distribution of microtubule-organizing centers (MTOCs) in the oocyte and during the first cell cycle of mouse development. In oocytes, the PCM was found not only at the poles of the barrel-shaped metaphase II spindle but also at many discrete loci around the cytoplasm near the cell cortex. The spindle poles were also composed of several PCM foci. In metaphase-arrested eggs only the PCM foci located near the chromosomes acted as MTOCs. However, after reduction of the critical concentration for tubulin polymerization by taxol, the cytoplasmic PCM foci were also found to be associated with nucleation of microtubules. After fertilization the cortical PCM foci remained in a peripheral position until the end of the S phase, when they appeared to migrate centrally towards the pronuclei. At prometaphase of the first mitotic division, numerous MTOCs were found around the two sets of chromosomes; these MTOCs then aligned to form two bands on either side of the metaphase plate of the first mitosis. The Rockefeller University Press 1985-11-01 /pmc/articles/PMC2113955/ /pubmed/2865266 Text en This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Articles
Non-spindle microtubule organizing centers in metaphase II-arrested mouse oocytes
title Non-spindle microtubule organizing centers in metaphase II-arrested mouse oocytes
title_full Non-spindle microtubule organizing centers in metaphase II-arrested mouse oocytes
title_fullStr Non-spindle microtubule organizing centers in metaphase II-arrested mouse oocytes
title_full_unstemmed Non-spindle microtubule organizing centers in metaphase II-arrested mouse oocytes
title_short Non-spindle microtubule organizing centers in metaphase II-arrested mouse oocytes
title_sort non-spindle microtubule organizing centers in metaphase ii-arrested mouse oocytes
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2113955/
https://www.ncbi.nlm.nih.gov/pubmed/2865266