Cao et al. [43] found that the downregulation of Mir-886-3p in small-cell lung cancer is closely related to the shorter survival of patients, and Mir-886-3p can inhibit the expression of target genes PLK1 and TGF-β1, thus inhibiting the proliferation, migration, and invasion of small-cell lung cancer. Here, TGFB1 is linked to small cell lung carcinoma.