Abstract:
:Neural stem cells are a multipotent population of tissue-specific stem cells with a broad but limited differentiation potential. However, recent studies have shown that over-expression of the pluripotency gene, Oct4, alone is sufficient to initiate a process by which these can form 'induced pluripotent stem cells' (iPS cells) with the same broad potential as embryonic stem cells. This led us to examine the expression of Oct4 in endogenous neural stem cells, as data regarding its expression in neural stem cells in vivo are contradictory and incomplete. In this study we have therefore analysed the expression of Oct4 and other genes associated with pluripotency throughout development of the mouse CNS and in neural stem cells grown in vitro. We find that Oct4 is still expressed in the CNS by E8.5, but that this expression declines rapidly until it is undetectable by E15.5. This decline is coincident with the gradual methylation of the Oct4 promoter and proximal enhancer. Immunostaining suggests that the Oct4 protein is predominantly cytoplasmic in location. We also found that neural stem cells from all ages expressed the pluripotency associated genes, Sox2, c-Myc, Klf4 and Nanog. These data provide an explanation for the varying behaviour of cells from the early neuroepithelium at different stages of development. The expression of these genes also provides an indication of why Oct4 alone is sufficient to induce iPS formation in neural stem cells at later stages.
journal_name
J Anatjournal_title
Journal of anatomyauthors
Lee SH,Jeyapalan JN,Appleby V,Mohamed Noor DA,Sottile V,Scotting PJdoi
10.1111/j.1469-7580.2010.01269.xsubject
Has Abstractpub_date
2010-09-01 00:00:00pages
203-13issue
3eissn
0021-8782issn
1469-7580pii
JOA1269journal_volume
217pub_type
杂志文章abstract::The study of the underlying mechanisms by which cells respond to mechanical stimuli, i.e. the link between the mechanical stimulus and gene expression, represents a new and important area in the morphological sciences. Several cell types ('mechanocytes'), e.g. osteoblasts and fibroblasts as well as smooth, cardiac and...
journal_title:Journal of anatomy
pub_type: 杂志文章,评审
doi:10.1046/j.1469-7580.1999.19430323.x
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abstract::The occurrence of pneumatisation in the skull of the adult domestic fowl was investigated in eight birds by gross and histological examination. It was found to occur regularly throughout the neurocranium and in the quadrate and variably in the mandible, but to be absent in the facial skeleton. Close agreement was foun...
journal_title:Journal of anatomy
pub_type: 杂志文章
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abstract::Hydrocortisone administration in vivo to neonatal mice for seven days led to a significant increase in both the size and the labelling index of extra-adrenal chromaffin tissue (as represented by the para-aortic body) of 8 days old mice. In untreated animals at this age, the para-aortic body was in most cases too small...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
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abstract::Anatomical specimens used in human or veterinary anatomy laboratories are usually prepared with formaldehyde (a cancerous and teratogenic substance), glycerin (an expensive and viscous fluid), or ethanol (which is flammable). This research aimed to verify the viability of an aqueous 30% sodium chloride solution for pr...
journal_title:Journal of anatomy
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更新日期:2014-07-01 00:00:00
abstract::The role of the neural arch in weight transmission in the cervical and upper thoracic regions of the vertebral column has been investigated. Measurements at the levels of C2, C4, C6, C7, T1 and T5 vertebrae were made in 44 adult male vertebral columns. At each level, the area of the inferior surface of the body was co...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
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abstract::The morphology of the cartilage-marrow interface in chick embryo tibiae has been studied from Day 11 to Day 14. The cartilage-marrow interface did not present a uniform aspect and three different areas could be defined. Most of the interface was lined by fibroblast-like cells, macrophage-like cells and multinucleate g...
journal_title:Journal of anatomy
pub_type: 杂志文章
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abstract::The unusual occurrence of skeletal muscle in the pineal gland of the bat Rhinopoma microphyllum is described. Individual muscle fibres were centrally placed and were incompletely encapsulated by a labyrinthine network of widened spaces filled with electron-dense material. The 2.4 micron long sarcomeres consisted of we...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
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abstract::The number of large neurons in the lateral vestibular nucleus of the mouse brain decreases in number after 25 months of age, from 488 at 25 months to 298 at 31 months. The number of small neurons in the nucleus remains constant up to 31 months of age. Large neurons accumulate lipofuscin from 25 months and their mean n...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1989-10-01 00:00:00
abstract::We sought to study the effect of synovectomy on the surface morphology of articular cartilages of the rabbit knee using scanning electron microscopy (SEM). Fifteen rabbits were surgically synovectomised and allowed to regenerate their synovia during time intervals ranging from 3 to 44 wk. Cartilage specimens were shav...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1046/j.1469-7580.1998.19230343.x
更新日期:1998-04-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
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journal_title:Journal of anatomy
pub_type: 杂志文章
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更新日期:2010-03-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章,评审
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.12354
更新日期:2015-10-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/j.1469-7580.2006.00639.x
更新日期:2006-11-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1989-12-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
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更新日期:2004-07-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/j.1469-7580.2010.01243.x
更新日期:2010-07-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
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更新日期:2016-05-01 00:00:00
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journal_title:Journal of anatomy
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 anatomy
pub_type: 杂志文章
doi:
更新日期:1978-03-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1977-04-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1981-03-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
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更新日期:1999-04-01 00:00:00
abstract::Fluorescence microscopy and transmission electron microscopy were used to study peribronchial ganglia of cats. An osmiophilic substance that is selectively taken up into the synaptic vesicles of adrenergic nerves (5-hydroxydopamine) was used to help differentiate adrenergic and non-adrenergic terminals. Peribronchial ...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1980-10-01 00:00:00
abstract::The proposal that the cytoplasmic granules of glomerular peripolar cells (PPCs) of the adult sheep and lamb contain a kallikrein-like substance has been re-examined. After extensive characterisation and purification of anti-kallikrein antibodies, it was concluded that PPCs do not contain immunohistochemically detectab...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1989-02-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1995-12-01 00:00:00
abstract::The mammalian cochlea is a remarkable sensory organ, capable of perceiving sound over a range of 10(12) in pressure, and discriminating both infrasonic and ultrasonic frequencies in different species. The sensory hair cells of the mammalian cochlea are exquisitely sensitive, responding to atomic-level deflections at s...
journal_title:Journal of anatomy
pub_type: 杂志文章,评审
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