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Bioinformatics analysis of CMTM family in pan-cancer and preliminary exploration of CMTM6 in bladder cancer

免疫系统 免疫疗法 肿瘤微环境 癌症 癌症研究 癌症免疫疗法 膀胱癌 生物标志物 生物 癌细胞 计算生物学 医学 免疫学 遗传学
作者
Yan Xu,Qianlong Li,Hualong Lin
出处
期刊:Cellular Signalling [Elsevier BV]
卷期号:115: 111012-111012 被引量:9
标识
DOI:10.1016/j.cellsig.2023.111012
摘要

The chemokine-like factor (CKLF)-like Marvel transmembrane structural domain (CMTM) family is widely expressed in the tumor and immune systems and is essential in human cancer progression. However, the multi-omic profile of CMTM family genes and their role in tumor patient prognosis and immune microenvironment have not been explored. We collected data from 33 cancers and 33 non-cancers and then comprehensively analyzed the basal expression levels of CMTM family genes in normal human tissues as well as abnormal expression in diseases, genomic alterations, diagnostic and prognostic roles, subcellular localization, pathway enrichment, the immune microenvironment, associations with immune checkpoints, and drug sensitivities as well as to predict the immunotherapeutic response of patients to ICIs and targeting of small molecule drugs, the above results were validated by immunohistochemical staining, pathology sections and experiments. We also performed protein docking of immune checkpoints binding to CMTM6 and screening of small molecule drugs targeting CMTM6 based on mass spectrometry results and molecular docking techniques. Finally, we experimentally confirmed the role of CMTM6 in bladder cancer. We found differential expression and diagnostic biomarker value of the CMTMs family in diseases (cancer and non-cancer). CMTMs were also found to play a key role in pan-cancer with the tumor microenvironment. CMTMs were closely associated with common immune checkpoints, TMB and MSI, so we scored CMTMs based on CMTMs expression in patients undergoing ICI, and patients with lower scores had better survival and showed higher immunotherapy response after immunotherapy. Finally, molecular docking was used to identify small molecule inhibitors that could target CMTM6 and binding poses of CMTM6 to other immune checkpoint genes. Finally, it was determined experimentally that knockdown of CMTM6 gene expression inhibited the proliferation and invasion of bladder cancer cells. Our findings provide a valuable strategy to guide the diagnostic and therapeutic direction of CMTM family genes in disease.
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