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相关概念视频

Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

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Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
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Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that  lead to cell proliferation, migration, and differentiation. Overexpression of EGFR  stimulates cells to proliferate. Excessive  EGFR...
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Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.
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The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
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The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...
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Updated: Sep 19, 2025

Application of Impermeable Barriers Combined with Candidate Factor Soaked Beads to Study Inductive Signals in the Chick
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MYB68调节辐射内皮分化和亚皮蛋白模式的形成.

Leonie Kraska1, Josep Mercadal Melia1, Ryohei Thomas Nakano1

  • 1Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, 50829 Cologne, Germany.

Cell reports
|June 7, 2025
PubMed
概括
此摘要是机器生成的。

研究人员确定了植物根中亚基化的一个关键调节器,揭示了西附近的特定通道细胞如何保持选择性吸收. 这一发现揭示了内皮细胞分化和根辐射组织.

关键词:
CP: 植物 植物细胞激素细胞激素是细胞激素.它们的内皮质 (endodermis) 是:穿越细胞 穿越细胞 穿越细胞根系血管系统 根系血管系统苏贝林就是这样的.组织图案 组织图案

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Grafting of Beads into Developing Chicken Embryo Limbs to Identify Signal Transduction Pathways Affecting Gene Expression
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Last Updated: Sep 19, 2025

Application of Impermeable Barriers Combined with Candidate Factor Soaked Beads to Study Inductive Signals in the Chick
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科学领域:

  • 植物生物学 植物生物学
  • 根部发展 根部发展
  • 细胞生物学 细胞生物学

背景情况:

  • 植物根具有特殊的内皮层,可以选择性地吸收营养和水分.
  • 成熟的内皮细胞发展出一层suberin,一种疏水的聚合物,密封内根组织.
  • 特定的内皮细胞,称为通道细胞,邻树皮细胞仍然未分类,表明在血管接入中发挥作用.

研究的目的:

  • 调查不同的内皮细胞身份和细胞档案的存在和重要性.
  • 为了确定控制细胞档案特异性亚分化和通道细胞分化的遗传调节者,在Arabidopsis thaliana.
  • 了解潜化背后的时空机制及其与体近距离的联系.

主要方法:

  • 在基因和发育研究中利用了模型植物Arabidopsis thaliana.
  • 研究了控制内皮体内亚体化模式的基因调节剂.
  • 分析了细胞档案特定的分化及其与树发育的关系.

主要成果:

  • 发现了一种新型的基因调节器,该调节器控制了内皮体内细胞文件特异性的亚基化.
  • 证明了这个调节器,亚分化和通道细胞分化之间的直接联系.
  • 提供了对控制内皮屏障形成和选择性细胞命运的机制的时空洞察力.

结论:

  • 穿越细胞代表着一个独特的内皮细胞类型,它们的分化有着特定的遗传基础.
  • 鉴定的调节器为了解内皮的辐射组织提供了一个框架.
  • 这项工作突出了通道细胞在促进血管接入和植物根中的选择性吸收方面的功能意义.