在口腔状细胞癌中,PIAS1通过抑制免疫逃避来形成抑制瘤的微环境
Parisa Ghahremanifard1,2, Jinsu An1,2, Ayan Chanda1,2
1Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada.
Cancers
|September 13, 2025
概括
在口腔癌中,激活STAT1 (PIAS1) 的蛋白抑制剂促进了抗瘤免疫力. 瘤细胞和免疫细胞中的PIAS1表达重新编程了瘤微环境,表明PIAS1是治疗点.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 激活STAT1蛋白抑制剂 (PIAS1) 是一种参与癌症途径的SUMO E3联酶.
- 它在瘤微环境 (TME),特别是非恶性细胞中的作用尚不清楚.
- 这项研究调查了口腔状细胞癌 (OSCC) 的TME中的PIAS1.
研究的目的:
- 在OSCC瘤微环境中描述PIAS1表达.
- 为了确定PIAS1在树皮和免疫细胞中的功能相关性.
- 探索PIAS1对抗瘤免疫力和治疗潜力的影响.
主要方法:
- 免疫组织化学 (IHC) 用于评估OSCC组织中的PIAS1蛋白水平.
- 单细胞RNA测序 (scRNA-seq) 来映射细胞类型特定的PIAS1表达.
- 生物信息分析包括差异性基因表达,IPA,GSEA和细胞间通信.
主要成果:
- 较高的 stromal PIAS1 与改善的患者存活率相关.
- PIAS1的表达在大多数树皮/免疫细胞中增加,但在TME内的癌细胞中减少.
- PIAS1阳性免疫细胞显示出瘤抑制途径,与具有免疫抑制信号的PIAS1阴性细胞不同.
结论:
- 体和免疫细胞中的PIAS1驱动OSCC微环境的瘤抑制重编程.
- 通过促进促炎信号和免疫细胞激活,PIAS1影响抗瘤免疫力.
- 在OSCC中,PIAS1是调节抗瘤免疫力的潜在治疗标.
相关概念视频
Abnormal Proliferation
5.1K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
5.1K
The Tumor Microenvironment
7.6K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
7.6K
piRNA - Piwi-interacting RNAs
7.5K
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
7.5K
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
Cancer Stem Cells and Tumor Maintenance
5.9K
Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
5.9K
The JAK-STAT Signaling Pathway
12.2K
Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...
12.2K


