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Fatty acid synthase is a prognostic marker and associated with immune infiltrating in gastric cancers precision medicine.

Aim: Fatty acid synthase (FASN), a key enzyme for de novo synthesis of fatty acids, has been identified as an oncogene in some tumor types; however, the function of FASN in gastric cancer (GC) is poorly elucidated. Method: Integrative bioinformatics analyses were performed to unveil the role of FASN in tumor progression and cancer-associated immunology of GC. Result: FASN was overexpressed in the GC tissues and correlated with an inferior survival outcome, and largely contributed to the carcinogenesis of GC. Moreover, FASN expression was closely associated with the immune-infiltrating levels of CD8+ T, CD4+ T, neutrophils, macrophages and dendritic cells. Conclusion: FASN was closely associated with GC and may be involved in the tumorigenesis and cancer-immune interactions, and could be a promising prognostic and therapeutic biomarker in GC.