PLK1 and neoplasm: Furthermore, the results showed that our β-carboline-3-carboxylic acid dimers may directly influence CASP7, CCNA2, ERBB4, MMP7, PLK1, and TK1. These six genes are involved in tumor immunity of SARC through correlating with B cell, CD4+ T cell, CD8+ T cell, Macrophage, Neutrophil, and Dendritic cells of SARC (Figures S5, S6).