Activity-driven extracellular volume expansion drives vertebrate axis elongation

Activity-driven extracellular volume expansion drives vertebrate axis elongation
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活动驱动的细胞外体积扩张驱动脊椎动物轴伸长

DOI:
10.1101/2022.06.27.497799
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发表时间:
2022
期刊:
bioRxiv
影响因子:
--
通讯作者:
O. Pourquié
O. Pourquié
中科院分区:
--
文献类型:
--
作者:
Arthur Michaut;Alessandro Mongera;Anupam Gupta;M. Serra;Pietro Rigoni;Jong Gwan Lee;Felipe Duarte;A. Hall;L. Mahadevan;K. Guevorkian;O. Pourquié

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脊椎动物的包皮计划主要是通过胚胎组织的形成而形成的,从头到尾的过程。这种伸长需要分裂前的中胚层(PSM),其生物力学机制仍然知之甚少。在这里,我们发现,鸟类的PSM外植体在体外物理限制时可以自主伸长,产生的推力可以在很大程度上解释胚胎的后部伸长。组织伸长是由细胞活动驱动的体积扩张导致的,并伴随着细胞外成分沿AP轴的不均匀增加。我们发现,成纤维细胞生长因子信号促进依赖糖酵解的透明质酸(HA)的产生,透明质酸是扩张后PSM所必需的。我们的发现通过对成纤维细胞生长因子信号下游细胞外基质产生的代谢控制,将体轴延长与组织扩张联系起来。一句话总结活跃的组织扩张推动身体伸长,不依赖于细胞增殖驱动的生长
The vertebrate bauplan is primarily established via the formation of embryonic tissues in a head-to-tail progression. The biomechanics of this elongation, which requires the presomitic mesoderm (PSM), remains poorly understood. Here, we find that avian PSM explants can elongate autonomously when physically confined in vitro, producing a pushing force that can largely account for the posterior elongation of the embryo. Tissue elongation results from volumetric expansion that is driven by cellular activity and accompanied by inhomogeneous increase of the extracellular fraction along the AP axis. We show that FGF signaling promotes glycolysis-dependent production of Hyaluronic Acid (HA), which is required for expansion of the posterior PSM. Our findings link body axis elongation to tissue expansion through the metabolic control of extracellular matrix production downstream of FGF signaling. One-Sentence Summary Active tissue expansion propels body elongation independent of cell proliferation-driven growth
纠正随机细胞运动作为胚胎伸长的​​机制。
DOI: 10.1242/dev.199423
发表时间: 2022
期刊: Development (Cambridge, England)
影响因子: --
作者:
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