This peptide can augment the release of anti-inflammatory cytokines, neutralize bacterial LPS, inhibit the release of proinflammatory factors, limit the expansion of inflammation, maintain the body's immune balance, and at the same time, recruit MSCs into tumors to enhance the immunosuppressive effect; in the tumor environment, LL-37 facilitate macrophage differentiation to anti-inflammatory M2-type cells, along with MSCs exerting carcinogenesis. This evidence concerns the gene CAMP and neoplasm.