XBP1 may determine the size of the ameloblast endoplasmic reticulum.

XBP1 may determine the size of the ameloblast endoplasmic reticulum.
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DOI:
10.1177/154405910808701115
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发表时间:
2008-11
影响因子:
7.6
通讯作者:
Bartlett JD
Bartlett JD
中科院分区:
医学1区
文献类型:
--
作者:
Tsuchiya M;Tye CE;Sharma R;Smith CE;Bartlett JD

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成釉细胞在牙齿上形成釉质的过程中经历了确定的发育阶段。分泌前成釉细胞产生高柱状分泌性成釉细胞,其引导釉质达到其全部厚度。在成熟阶段,成釉细胞缩短并引导釉质达到其最终硬化形式。在这里,我们问如何选择成釉细胞器的体积变化(每成釉细胞的体积百分比),成釉细胞的进展,通过六个定义的发展阶段。我们证明,线粒体体积在成熟后期达到峰值,表明成熟阶段的成釉细胞保持高水平的代谢活性。此外,内质网(ER)的体积变化显着的功能的发育阶段。这促使我们问,如果X-box结合蛋白-1(XBP 1)起着调节成釉细胞ER体积的作用,如先前已证明的分泌腺泡细胞和浆细胞分化。我们证明Xbp 1的表达与成釉细胞ER的体积百分比呈正相关。
Ameloblasts progress through defined stages of development as enamel forms on teeth. Pre-secretory ameloblasts give rise to tall columnar secretory ameloblasts that direct the enamel to achieve its full thickness. During the maturation stage, the ameloblasts shorten and direct the enamel to achieve its final hardened form. Here we ask how the volume of selected ameloblast organelles changes (percent volume per ameloblast) as ameloblasts progress through six defined developmental stages. We demonstrate that mitochondria volume peaks during late maturation, indicating that maturation-stage ameloblasts maintain a high level of metabolic activity. Also, the endoplasmic reticulum (ER) volume changes significantly as a function of developmental stage. This prompted us to ask if X-box-binding protein-1 (XBP1) plays a role in regulating ameloblast ER volume, as has been previously demonstrated for secretory acinar cells and for plasma cell differentiation. We demonstrate that Xbp1 expression correlates positively with percent volume of ameloblast ER.
DOI: 10.1038/35085509
发表时间: 2001-07-19
期刊: NATURE
影响因子: 64.8
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发表时间: 1977-01-01
期刊: ANATOMICAL RECORD
影响因子: --
作者:
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通讯作者: WARSHAWSKY, H