Abstract：
:Previous investigators have examined mitochondrial DNA (mtDNA) in the electron microscope (EM) after extraction from mitochondria and rotary shadowing. We have observed mtDNA in situ by the osmiumammine procedure for specific staining of DNA in the EM. The procedure was modified to improve the regularity of the staining and then applied to the rapidly dividing cells present in mouse duodenal crypts. In the stained sections of these cells, 25% of the mitochondria exhibited discrete reactive filaments. The filaments, whether observed directly or in stereopairs, appeared either irregular or arranged into distinct patterns, some of which were similar to those previously described after rotary shadowing of duplicating mtDNA: namely, simple and double circular figures, displacement loops and supercoiled forms. The filaments could be traced in serial sections of the same mitochondria and, therefore, were not artifacts. Moreover, their disappearance after DNase digestion demonstrated that they were composed of DNA. It is concluded that mtDNA can be visualized by the modified osmium-ammine technique and may show patterns that can be interpreted as phases in its replication.
journal_name
J Cell Scijournal_title
Journal of cell scienceauthors
Liu DF,el-Alfy M,Leblond CPkeywords:
subject
Has Abstractpub_date
1992-04-01 00:00:00pages
785-93eissn
0021-9533issn
1477-9137journal_volume
101 ( Pt 4)pub_type
杂志文章abstract：:Changes in cellular behavior that cause epithelial cells to lose adhesiveness, acquire a motile invasive phenotype and metastasize to secondary sites are complex and poorly understood. Molecules that normally function to integrate adhesive spatial information with cytoskeleton dynamics and membrane trafficking probabl...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.031641
更新日期：2008-09-01 00:00:00
abstract：:Earlier reports have indicated that the pollen of Eucalyptus is mechanically robust and unusually resistant to the osmotic stress imposed by immersion in water. We have investigated some of the features of the germination mechanism in the pollen of E. rhodantha with a view to clarifying the role of pollen-wall special...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：1985-02-01 00:00:00
abstract：:Collagen V is a regulatory fibril-forming collagen that forms heterotypic fibrils with collagen I. Deletion of collagen V in the mouse is associated with a lack of fibril assembly in the embryonic mesenchyme, with a resultant lethal phenotype. The current work elucidates the regulatory roles of collagen V during devel...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.091363
更新日期：2011-12-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：1990-10-01 00:00:00
abstract：:Glycosylphosphatidylinositol-anchored proteins on the egg surface have been proposed to play a role in gamete fusion on the basis of in vitro experiments. We tested this hypothesis by asking if oocyte GPI-anchored proteins are required for fertilization in vivo. Oocyte-specific knockout mice were created using the Cre...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.00430
更新日期：2003-06-01 00:00:00
abstract：:Cutaneous wound healing is accelerated by exogenous mechanical forces and is impaired in TRPC6-knockout mice. Therefore, we designed experiments to determine how mechanical force and TRPC6 channels contribute to wound healing using HaCaT keratinocytes. HaCaT cells were pretreated with hyperforin, a major component of ...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.147314
更新日期：2014-10-01 00:00:00
abstract：:T cell activation is accompanied by actin-mediated receptor clustering and reorganization of lipid rafts. It has been suggested that costimulatory molecules might be involved in these processes. We here provide evidence that engagement of the adhesion molecule CD44 initiates cytoskeletal rearrangement and membrane reo...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：2001-03-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：1984-03-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.173021
更新日期：2015-10-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：2001-05-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：1975-07-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.01331
更新日期：2004-09-01 00:00:00
abstract：:Neural progenitors in the vertebrate nervous system are fully polarized epithelial cells, with intercellular junctions at the apical region. These progenitor cells remain within the neuroepithelium throughout neurogenesis, and will ultimately give rise to all the neurons in the mature nervous system. We have addressed...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.03170
更新日期：2006-10-15 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：1989-11-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.02757
更新日期：2006-02-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：1994-03-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.043794
更新日期：2009-08-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.138313
更新日期：2013-11-15 00:00:00
abstract：:It is now becoming clear that additional transmembrane components can modify integrin-mediated adhesion. Syndecan-4 is a transmembrane heparan sulfate proteoglycan whose external glycosaminoglycan chains can bind extracellular matrix ligands and whose core protein cytoplasmic domain can signal during adhesion. Two pap...
journal_title：Journal of cell science
pub_type： 评论,杂志文章,评审
doi：
更新日期：1999-10-01 00:00:00
abstract：:During meiotic prophase in the ciliate Tetrahymena thermophila micronuclei dramatically elongate and form thread-like crescents. The arrangement of the chromosomes within the crescent as well as the timing of chromosome pairing and recombination with respect to the elongation process have been subjects of ongoing deba...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.01504
更新日期：2004-11-15 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.051755
更新日期：2009-11-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：1993-12-01 00:00:00
abstract：:Transcriptional activation of the major histocompatibility complex (MHC) by IFNgamma is a key step in cell-mediated immunity. At an early stage of IFNgamma induction, chromatin carrying the entire MHC locus loops out from the chromosome 6 territory. We show here that JAK/STAT signalling triggers this higher-order chro...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.012328
更新日期：2007-09-15 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：2001-02-01 00:00:00
abstract：:The identification and characterization of scaffold and targeting proteins of the ERK/MAP kinase pathway is important to understand the function and intracellular organization of this pathway. The F-actin binding protein leukocyte-specific protein 1 (LSP1) binds to PKCbetaI and expression of B-LSP1, an LSP1 truncate c...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.00955
更新日期：2004-04-15 00:00:00
abstract：:We have previously demonstrated that the subcellular distribution of the adhesion plaque protein, talin, changes dramatically in human platelets in response to platelet activation (Beckerle et al., J. Cell Biol. 109, 3333-3346, 1989). Talin is uniformly distributed throughout the cytoplasm of resting platelets. Howeve...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：1993-12-01 00:00:00
abstract：:Membrane-type matrix metalloproteinase 1 (MT1-MMP) is a membrane-anchored matrix metalloproteinase (MMP) that is frequently associated with processes involving tissue remodelling and cell migration. We have examined MT1-MMP expression and subcellular distribution as a function of MCF10A mammary epithelial cell migrati...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：2001-08-01 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：10.1242/jcs.02875
更新日期：2006-04-15 00:00:00
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journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：1994-04-01 00:00:00
abstract：:In the present study, to further elucidate the molecular events that control neural crest cell migration, we have analyzed in vitro the adhesive and locomotory response of avian trunk neural crest cells to laminin-1 and searched for the integrin receptors involved in this process. Adhesion of crest cells on laminin-1 ...
journal_title：Journal of cell science
pub_type： 杂志文章
doi：
更新日期：1997-11-01 00:00:00
