Purpose
With immunotherapy for colorectal cancer (COAD or CRC) presenting certain adverse effects, there arises a pressing need for novel targets within this domain. Hence, this study endeavors to explore the potential role of ATG7, an immune autophagy gene, as a pivotal factor influencing tumor cell growth.
Methods
The mRNA expression profile of ATG7 was assessed by aggregating samples from both tumor and normal tissues sourced from the TCGA, TARGET, and GTEx databases. The HPA database and GEPIA database were used to examine the expression and location of ATG7 in tumor tissues and its correlation with the survival rate of tumor patients. In addition, we used the STRING, TIMER 2.0 and LinkedOmics database to analyze the role of ATG7 in immune-related signaling pathways.
Results
This study demonstrated that ATG7 expression was significantly elevated in tumor tissues compared to normal tissues. Furthermore, higher ATG7 expression was associated with a more favorable prognosis in colorectal cancer (COAD). Additionally, our analysis revealed notable correlations between ATG7 expression in COAD and immune cell infiltration and immune cell markers, with ATG7 having the highest correlation with STAT1. Finally, the examination of the co-expression network of ATG7 revealed its involvement in the humoral immune response, response to interleukin-12, and activation of granulocytes.
Conclusion
The findings of this study highlight the pivotal role of ATG7 in multiple signaling pathways associated with immune response, immune cell infiltration, and tumor regulation. Therefore, ATG7 could be a promising biomarker for assessing the prognosis of patients with COAD.
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