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Rbfox3 Promotes Transformation of MDSC-Like Tumor Cells to Shape Immunosuppressive Microenvironment
Advanced Science ( IF 14.3 ) Pub Date : 2025-01-07 , DOI: 10.1002/advs.202404585
Zhiyang Li 1, 2 , Zhuangzhuang Feng 1 , Mengzhan Chen 1 , Xinxiu Shi 1 , Bijia Cui 1 , Yujie Sun 1 , Heng Zhang 1, 2 , Yinan Li 1 , Caihong Chen 1 , Yiqian Feng 1 , Jingxia Han 1 , Xuewu Xing 3 , Huijuan Liu 1 , Tao Sun 1
Advanced Science ( IF 14.3 ) Pub Date : 2025-01-07 , DOI: 10.1002/advs.202404585
Zhiyang Li 1, 2 , Zhuangzhuang Feng 1 , Mengzhan Chen 1 , Xinxiu Shi 1 , Bijia Cui 1 , Yujie Sun 1 , Heng Zhang 1, 2 , Yinan Li 1 , Caihong Chen 1 , Yiqian Feng 1 , Jingxia Han 1 , Xuewu Xing 3 , Huijuan Liu 1 , Tao Sun 1
Affiliation
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Myeloid-derived suppressor cells (MDSCs) within the tumor microenvironment (TME) contribute to the malignant progression of tumors by exerting immunosuppressive effects. Bacterial lipopolysaccharides (LPS) have been widely demonstrated in various types of solid tumors. LPS can promote the malignant progression of tumors, which mechanism has not yet been fully elucidated. In this study, a type of MDSC-like tumor cells (MLTCs) is found in tumor tissues induced by low-dose and long-term LPS stimulation. MLTCs can simultaneously express tumor cell and MDSCs markers. Similar to MDSCs, MLTCs can produce arginine, nitric oxide, and reactive oxygen species and inhibit the activity of NK and T cells to promote the formation of an immunosuppressive microenvironment. MLTCs can also promote tumor cell proliferation and vasculogenic mimicry formation. CRISPR-Cas9 activity screening studies identified RNA-binding Fox-1 homolog 3 (Rbfox3) as a critical protein for MLTCs formation after LPS treatment. Rbfox3 can transcriptionally regulate the expression of Ass1 in the form of phase-separated particles. Crocin can inhibit the generation of MLTCs by disrupting phase-separated particles of Rbfox3 and enhance the anti-tumor effects of immune checkpoint inhibitors (ICIs).
中文翻译:
Rbfox3 促进 MDSC 样肿瘤细胞转化以塑造免疫抑制微环境
肿瘤微环境 (TME) 中的髓源性抑制细胞 (MDSC) 通过发挥免疫抑制作用促进肿瘤的恶性进展。细菌脂多糖 (LPS) 已在各种类型的实体瘤中得到广泛证明。LPS 可促进肿瘤的恶性进展,其机制尚未完全阐明。在这项研究中,在低剂量和长期 LPS 刺激诱导的肿瘤组织中发现了一种 MDSC 样肿瘤细胞 (MLTC)。MLTC 可以同时表达肿瘤细胞和 MDSCs 标志物。与 MDSC 类似,MLTC 可以产生精氨酸、一氧化氮和活性氧,并抑制 NK 和 T 细胞的活性,促进免疫抑制微环境的形成。MLTC 还可以促进肿瘤细胞增殖和血管生成模拟物的形成。CRISPR-Cas9 活性筛选研究发现 RNA 结合 Fox-1 同源物 3 (Rbfox3) 是 LPS 处理后 MLTC 形成的关键蛋白。Rbfox3 可以以相分离颗粒的形式转录调节 Ass1 的表达。藏红花素可以通过破坏 Rbfox3 的相分离颗粒来抑制 MLTC 的产生,并增强免疫检查点抑制剂 (ICI) 的抗肿瘤作用。
更新日期:2025-01-07
中文翻译:

Rbfox3 促进 MDSC 样肿瘤细胞转化以塑造免疫抑制微环境
肿瘤微环境 (TME) 中的髓源性抑制细胞 (MDSC) 通过发挥免疫抑制作用促进肿瘤的恶性进展。细菌脂多糖 (LPS) 已在各种类型的实体瘤中得到广泛证明。LPS 可促进肿瘤的恶性进展,其机制尚未完全阐明。在这项研究中,在低剂量和长期 LPS 刺激诱导的肿瘤组织中发现了一种 MDSC 样肿瘤细胞 (MLTC)。MLTC 可以同时表达肿瘤细胞和 MDSCs 标志物。与 MDSC 类似,MLTC 可以产生精氨酸、一氧化氮和活性氧,并抑制 NK 和 T 细胞的活性,促进免疫抑制微环境的形成。MLTC 还可以促进肿瘤细胞增殖和血管生成模拟物的形成。CRISPR-Cas9 活性筛选研究发现 RNA 结合 Fox-1 同源物 3 (Rbfox3) 是 LPS 处理后 MLTC 形成的关键蛋白。Rbfox3 可以以相分离颗粒的形式转录调节 Ass1 的表达。藏红花素可以通过破坏 Rbfox3 的相分离颗粒来抑制 MLTC 的产生,并增强免疫检查点抑制剂 (ICI) 的抗肿瘤作用。