非遗传差异是食道上皮质克隆之间的增殖变异的基础
Raúl A Reyes Hueros1, Rodrigo A Gier2, Sydney M Shaffer2,3
1Department of Biochemistry and Molecular Biophysics, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America.
PLoS computational biology
|October 28, 2024
概括
细胞生长有很大的差异,有些克隆会呈指数级增殖,而另一些则会停止. 这项研究确定了与食道细胞高增殖相关的遗传生长特征和分子途径.
科学领域:
- 细胞生物学 细胞生物学
- 干细胞生物学 干细胞生物学
- 基因组学就是基因组学.
背景情况:
- 个体细胞在培养中表现出多样化的生长模式,影响研究.
- 这种生长变化的基础细胞状态和动态尚不清楚.
研究的目的:
- 在体外研究食道上皮细胞的生长动态和细胞状态.
- 确定影响细胞增殖和生长潜力的遗传性因素.
主要方法:
- 使用食道上皮细胞的成像和细胞条形码的克隆追踪 (EPC2-hTERT).
- 数学建模用于分析增长行为 (指数式与后勤式).
- 单细胞RNA测序 (scRNA-seq) 与条形码结合,以识别细胞状态.
主要成果:
- 大约10%的克隆表现出指数增长;其余的变得非繁殖.
- 指数式增长倾向是继承的,超过四个倍增.
- 增加的涂层密度挽救了不那么繁殖的克隆的繁殖.
- 高增殖克隆与WNT和PI3K通路基因表达有关.
- 在生长的健康人食道上皮质中发现了类似的细胞状态.
结论:
- 消化道上皮细胞在体外增殖的特点是独特的,可遗传的生长动态.
- 特定的分子通路 (WNT,PI3K) 与高增殖潜力有关.
- 这些发现表明,与体内食道上皮细胞行为有关.
相关概念视频
01:14Maintenance of the ES Cell State
2.2K
The cells of the blastocyst inner cell mass only remain pluripotent for a short time. This state of pluripotency and self-renewal can be maintained in embryonic stem (ES) cell culture by adding specific chemicals or growth factors to ensure the cells can continue dividing and later differentiate into different cell types. In some cases, the cells are grown on a feeder layer of differentiated cells, which provides the growth factors and extracellular matrix components necessary for stem cell...
2.2K
02:26Comparing Copy Number Variations and SNPs
17.4K
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
17.4K