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基因信号与生物电信号之间的相互作用使得模型多细胞集合体中的膜电位呈现出空间区域化。

The interplay between genetic and bioelectrical signaling permits a spatial regionalisation of membrane potentials in model multicellular ensembles.

作者信息

Cervera Javier, Meseguer Salvador, Mafe Salvador

机构信息

Dept. de Termodinàmica, Facultat de Física, Universitat de València, E-46100 Burjassot, Spain.

Laboratory of RNA Modification and Mitochondrial Diseases, Centro de Investigación Príncipe Felipe, Valencia 46012, Spain.

出版信息

Sci Rep. 2016 Oct 12;6:35201. doi: 10.1038/srep35201.

Abstract

The single cell-centred approach emphasises ion channels as specific proteins that determine individual properties, disregarding their contribution to multicellular outcomes. We simulate the interplay between genetic and bioelectrical signals in non-excitable cells from the local single-cell level to the long range multicellular ensemble. The single-cell genetic regulation is based on mean-field kinetic equations involving the mRNA and protein concentrations. The transcription rate factor is assumed to depend on the absolute value of the cell potential, which is dictated by the voltage-gated cell ion channels and the intercellular gap junctions. The interplay between genetic and electrical signals may allow translating single-cell states into multicellular states which provide spatio-temporal information. The model results have clear implications for biological processes: (i) bioelectric signals can override slightly different genetic pre-patterns; (ii) ensembles of cells initially at the same potential can undergo an electrical regionalisation because of persistent genetic differences between adjacent spatial regions; and (iii) shifts in the normal cell electrical balance could trigger significant changes in the genetic regulation.

摘要

以单细胞为中心的方法强调离子通道是决定个体特性的特定蛋白质,而忽略了它们对多细胞结果的贡献。我们模拟了从局部单细胞水平到远距离多细胞集合体中非兴奋性细胞中遗传信号和生物电信号之间的相互作用。单细胞遗传调控基于涉及mRNA和蛋白质浓度的平均场动力学方程。转录速率因子被假定取决于细胞电位的绝对值,而细胞电位由电压门控细胞离子通道和细胞间间隙连接决定。遗传信号和电信号之间的相互作用可能允许将单细胞状态转化为提供时空信息的多细胞状态。模型结果对生物学过程具有明确的启示:(i)生物电信号可以超越略有不同的遗传预模式;(ii)由于相邻空间区域之间存在持续的遗传差异,最初处于相同电位的细胞集合体可能会经历电区域化;(iii)正常细胞电平衡的改变可能会触发遗传调控的显著变化。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/947b/5059667/6630456ed9d5/srep35201-f1.jpg

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