背景:同源异型盒C6(HOXC6)是一种编码参与各种细胞过程的转录因子的基因,包括发展和分化,并调节癌症进展。然而,HOXC6在肺腺癌(LUAD)中的致癌作用仍需进一步研究。
方法:在多个公开数据集中,研究了mRNA和蛋白质水平的差异HOXC6表达水平,包括癌症基因组图谱(TCGA)和人类蛋白质图谱(HPA)数据集。基因表达Omnibus(GSE31210),国际癌症基因组联盟(ICGC)数据集和广西医科大学附属医院LUAD样本。我们还研究了HOXC6表达与临床病理指标之间的关系。此外,免疫浸润的相关性,研究了药物反应性和HOXC6。
结果:与正常肺组织相比,LUAD组织中HOXC6的mRNA和蛋白表达上调。此外,总生存时间相对较短,更差的T和N阶段,在高表达HOXC6亚组中发现较低的免疫评分。值得注意的是,调节性T细胞(Tregs),巨噬细胞M0和浆细胞在高HOXC6表达亚组中具有较高的浸润水平,当NK细胞被激活时,单核细胞,树突状细胞静息,静止的肥大细胞具有较低的浸润水平。在药物敏感性分析中,我们发现,高-HOXC6表达的LUAD患者可能更易感喜树碱,阿糖胞苷,多西他赛,Elesclomol,雷帕霉素,索拉替尼,坦西罗莫司,还有Vorinostat.
结论:综合来看,HOXC6很有可能成为一种预后生物标志物,并有助于开发LUAD患者的治疗策略.需要进一步探索HOXC6的机制和药物开发。
BACKGROUND: Homeobox C6 (HOXC6) is a gene that encodes for a transcription factor involved in various cellular processes, including development and differentiation, and regulates cancer progression. However, the carcinogenesis and effect of HOXC6 in lung adenocarcinoma (LUAD) still need further investigation.
METHODS: The differential HOXC6 expression levels at the mRNA and protein level were explored in multiple public datasets, including The Cancer Genome Atlas (TCGA) and Human Protein Atlas (HPA) dataset. Gene Expression Omnibus (GSE31210), International Cancer Genome Consortium (ICGC) datasets and the LUAD sample from Affiliated Hospital of Guangxi Medical University. We also investigated the relation between HOXC6 expression and clinicopathologic indexes. Furthermore, the correlation of immune infiltration, drug responsiveness and HOXC6 were explored.
RESULTS: The upregulated HOXC6 expressions at mRNA and protein levels were found in LUAD tissues compared to the normal lung tissues. Besides, the relatively shorter overall survival time, worse T and N stages, and lower immune scores were found in the high-expression HOXC6 subgroup. Notably, T cells regulatory (Tregs), Macrophages M0, and Plasma cells had the higher infiltration levels in the high-HOXC6 expression subgroup, while NK cells activated, Monocytes, Dendritic cells resting, and Mast cells resting had the lower infiltration levels. In drug sensitivity analysis, we revealed that LUAD patients with high-HOXC6 expression may be more susceptible to Camptothecin, Cytarabine, Docetaxel, Elesclomol, Rapamycin, Sorafinib, Temsirolimus, and Vorinostat.
CONCLUSIONS: Taken together, there is a great potential for HOXC6 to become a prognosis biomarker and contribute to develop treatment strategies for LUAD patients. Further mechanism exploration and drug development for HOXC6 are needed.