Spatial and temporal regulation of gene expression in the mammalian growth plate.

Spatial and temporal regulation of gene expression in the mammalian growth plate.
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DOI:
10.1016/j.bone.2010.01.373
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发表时间:
2010-05
期刊:
影响因子:
4.1
通讯作者:
Nilsson, Ola
Nilsson, Ola
中科院分区:
医学2区
文献类型:
--
作者:
Lui, Julian C. K.;Andrade, Anenisia C.;Forcinito, Patricia;Hegde, Anita;Chen, WeiPing;Baron, Jeffrey;Nilsson, Ola

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生长板在空间上极化并构造成三个组织学和功能不同的层——静止区(RZ)、增殖区(PZ)和肥大区(HZ)。随着年龄的增长,生长板会经历功能和结构的衰老变化,包括生长速率、增殖速率、生长板高度和细胞数量的下降。为了以公正的方式探索生长板的空间相关分化和时间相关衰老的机制,我们使用显微解剖从1周大鼠的胫骨近端收集单个生长板区域以及从3周、6周、9周和12周大鼠生长板的PZ和早期肥大区,并使用微阵列分析基因表达。然后,我们使用生物信息学方法来识别生物功能、分子途径、转录因子的显着变化,并识别可用作单个区域或时间发育的分子标记的特定基因产物。
Growth plates are spatially polarized and structured into three histologically and functionally distinct layers – the resting zone (RZ), proliferative zone (PZ), and hypertrophic zone (HZ). With age, growth plates undergo functional and structural senescent changes including declines of growth rate, proliferation rate, growth plate height and cell number. To explore the mechanisms responsible for spatially-associated differentiation and temporally-associated senescence of growth plate in an unbiased manner, we used microdissection to collect individual growth plate zones from proximal tibiae of 1-wk rats and the PZ and early hypertrophic zones of growth plates from 3-, 6-, 9-, and 12-wk rats and analyzed gene expression using microarray. We then used bioinformatic approaches to identify significant changes in biological functions, molecular pathways, transcription factors and also to identify specific gene products that can be used as molecular markers for individual zones or for temporal development.
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