Abstract:
:Through serial thin-section analysis of rat mammary epithelial cells, the number of centrioles per cell and their intracellular location were determined. In all developmental stages (e.g. virginal, pregnant, lactation, involution), each epithelial cell contained a single centriole that was located in the apical region. Centrioles were 200-220 (mean = 210) nm in transverse section, and exhibited the typical 9 X 3 'pinwheel' configuration of microtubules. In longitudinal section, centrioles were 330-380 (mean = 360) nm in length. Each centriole was surrounded by a homogeneous pericentriolar matrix. During mitosis in pregnant animals, centrioles were paired at the nuclear poles and oriented at right angles (90 degrees) to each other. At the completion of mitosis a single diplosome (pair of centrioles) was associated with each interphase nucleus. Because all postmitotic cells contained only a single centriole, it was assumed that one of the two diplosomal centrioles had disintegrated. There appeared to be a correlation between centriole location and cell polarity. When centrioles were located near the apical plasma membrane, epithelial cells exhibited polarity. However, when centrioles were associated with the nuclear poles during mitosis, epithelial cells were typically apolar. These observations suggest that centrioles may function as determinants in cell polarity.
journal_name
J Cell Scijournal_title
Journal of cell scienceauthors
Dylewski DP,Keenan TWsubject
Has Abstractpub_date
1984-12-01 00:00:00pages
185-93eissn
0021-9533issn
1477-9137journal_volume
72pub_type
杂志文章abstract::Electrical synapses (gap junctions) rapidly transmit signals between neurons and are composed of connexins. In neurons, connexin36 (Cx36) is the most abundant isoform; however, the mechanisms underlying formation of Cx36-containing electrical synapses are unknown. We focus on homocellular and heterocellular gap juncti...
journal_title:Journal of cell science
pub_type: 杂志文章
doi:10.1242/jcs.133066
更新日期:2014-03-15 00:00:00
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journal_title:Journal of cell science
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journal_title:Journal of cell science
pub_type: 杂志文章
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journal_title:Journal of cell science
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更新日期:2003-03-15 00:00:00
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pub_type: 杂志文章
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更新日期:2010-05-01 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
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更新日期:1999-07-01 00:00:00
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journal_title:Journal of cell science
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journal_title:Journal of cell science
pub_type: 杂志文章
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更新日期:2014-08-01 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1999-04-01 00:00:00
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pub_type: 杂志文章
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journal_title:Journal of cell science
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更新日期:2009-04-01 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
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journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1990-10-01 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:2002-09-01 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
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更新日期:2006-03-15 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1980-08-01 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
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pub_type: 杂志文章
doi:
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journal_title:Journal of cell science
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journal_title:Journal of cell science
pub_type: 杂志文章
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journal_title:Journal of cell science
pub_type: 评论,杂志文章,评审
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journal_title:Journal of cell science
pub_type: 杂志文章
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更新日期:2004-10-01 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
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更新日期:2006-02-15 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
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更新日期:2004-10-15 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
doi:
更新日期:1985-08-01 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
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更新日期:2005-02-15 00:00:00
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journal_title:Journal of cell science
pub_type: 杂志文章
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更新日期:2018-04-23 00:00:00