相关实验视频
Updated: Jan 22, 2026

10:19
Derivation of Mouse Trophoblast Stem Cells from Blastocysts
Published on: June 8, 2010
18.7K
鼠标热原体干细胞缺乏TNFα激活的NFκB信号通路和炎症反应
Yeseul Bae1, Marwah Walid Ali Alzara1, Yan-Lin Guo1
1Cell and Molecular Biology Program, University of Southern Mississippi, Hattiesburg, USA.
American journal of reproductive immunology (New York, N.Y. : 1989)
|January 21, 2026
概括
热原体干细胞 (TSC) 不对TNFα作出反应,避免炎症诱导的细胞死亡. 这项研究揭示了这种不反应的分子基础,表明TSCs独立于TNFα信号传递来调节基本基因.
科学领域:
- 免疫学 免疫学 免疫学
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
背景情况:
- 已知多细胞干细胞 (TSCs) 和它们的分化后代 (TSC-TBs) 对瘤坏死因子-α (TNFα) 没有反应.
- 这种不响应对于预防结合TNFα和干扰素玛 (IFNγ) 暴露的细胞毒性作用至关重要.
- 了解这种TNFα不敏感性背后的分子机制对于理解胎盘发育和免疫特权至关重要.
研究的目的:
- 阐明TSC和TSC-TB对TNFα不反应的分子基础.
- 评估TNFα信号通路在这些特定细胞类型中的功能.
- 调查TSC和TSC-TB如何维持细胞基本功能,尽管它们对TNFα诱导的炎症信号没有反应.
主要方法:
- 在TSC/TSC-TB和小鼠胚胎纤维细胞 (MEF) 之间对TNFα反应的比较分析.
- 使用RNA测序 (RNA-seq) 来分析基因表达变化,进行全基因组的转录基因分析.
- 详细检查TNFα信号通路,NFκB激活和基因表达.
主要成果:
- MEFs在NFκB目标基因表达中表现出显著的TNFα诱导的变化,而TSC和TSC-TB则对TNFα表现出最小的转录反应.
- 尽管TNFα不响应,但TSC和TSC-TB表达重要的NFκB基因,这些基因对它们的特定功能至关重要.
- 这些基因以特定细胞类型的方式进行调节,表明独立的控制机制.
结论:
- 该研究确定了TSC和TSC-TB中缺乏对TNFα的炎症反应的分子基础.
- TSCs和TSC-TBs已经发展出了避免TNFα诱导的细胞毒性,同时保持重要的细胞功能的机制.
- 这种独特的免疫特性有助于胎盘的免疫特权.
相关概念视频
Inflammatory Response
16.1K
An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
16.1K
Interactions Between Signaling Pathways
7.2K
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
7.2K
Diversity in Cell Signaling Responses
7.7K
The physiological function of a cell and cellular communication are outcomes of a range of extrinsic signals, intracellular signaling pathways, and cellular responses. No two cell types express the same repertoire of signaling components. Receptors are highly selective for their cognate ligands, but once activated, they can alter multiple cellular processes such as DNA transcription, protein synthesis, and metabolic activity.
Graded and Abrupt Responses
Some signaling systems generate...
Graded and Abrupt Responses
Some signaling systems generate...
7.7K
Inflammatory Response II: Inflammatory Exudate and Tissue Repair
7.5K
The immune system's inflammatory response destroys the invading pathogen, permitting the tissue to heal. The changes during the cellular and vascular stages allow exudate formation at the site of inflammation. The inflammatory exudate released from the wound has high protein content and a specific gravity above 1.020.
The typical wound exudate is odorless, transparent, straw-colored, thin, and watery. Exudate, however, can differ depending on the state of wound healing. Likewise, the...
The typical wound exudate is odorless, transparent, straw-colored, thin, and watery. Exudate, however, can differ depending on the state of wound healing. Likewise, the...
7.5K
Notch Signaling Pathway
6.5K
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
6.5K
Hedgehog Signaling Pathway
9.9K
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
9.9K

