结直肠癌组织浸润免疫细胞组成及特征

目的：研究结直肠癌（CRC）患者和健康人大肠组织中免疫细胞的浸润情况，为后续开展肿瘤微环境的研究提供前期的分析结果和数据。方法：通过GEO数据库对51例正常人结直肠组织和333例CRC患者肿瘤组织的基因表达谱数据进行计算分析，通过CIBERSORT方法将基因表达谱数据转化为组织中22种免疫细胞的浸润比例，对比这些免疫细胞在两者中的分布情况。结果：肠道浸润的免疫细胞组成在CRC患者与健康人之间有较大差异。T细胞和B细胞在肿瘤组织中的浸润数量少于健康人，而巨噬细胞、中性粒细胞、肥大细胞和树突状细胞在肿瘤组织中的浸润数量大于健康人。结论：CRC患者和健康人的结直肠组织中免疫细胞浸润存在较大的差异，这些具有差异的免疫细胞在癌症进展中可能发挥重要作用。

Differences of immune cell composition between colorectal cancer and normal colorectal tissue

Objective: To investigate the infiltrated immune cells in colorectal cancer patients and normal people, and to provide new ideas and directions for cancer related research. Methods: Gene expression profiles of 51 normal people and 333 colorectal cancer (CRC) patients from GEO database were analyzed, and CIBERSORT was used to transform the gene expression profile data into the infiltration ratio of 22 kinds of immune cells, and the distribution of these immune cells in both groupd of patients was compared. Results: The composition of intestinal infiltrated immune cells was significantly different between CRC patients and healthy people. The infiltration of T cells and B cells in tumor tissue was less than that in healthy people, while the infiltration of macrophages, neutrophils, mast cells and dendritic cells in tumor tissue was more than that in healthy people. Conclusion: There are great differences in the infiltration of immune cells in colorectal tissues between CRC patients and healthy people. These different immune cells may play an important role in the development of cancer.