LINC00511 is upregulated in thyroid carcinoma and its silencing promotes radiosensitivity of thyroid carcinoma cells. (A) The expression level of LINC00511 in thyroid carcinoma cell lines (TPC-1, BCPAP and IHH-4) and normal thyroid epithelial cell line (Nthy-ori 3–1) was measured by qRT-PCR. (B) qRT-PCR analysis of LINC00511 expression in TPC-1 and BCPAP cells under 4Gy irradiation. (C) qRT-PCR was used again to examine the expression level of LINC00511 in TPC-1 and BCPAP cells treated with sh-NC, sh-LINC00511#1 or LINC00511#2. (D) Cell proliferation of TPC-1 and BCPAP cells with the silencing of LINC00511 under 0 or 4Gy irradiation was, respectively, tested by CCK-8 assay. (E) Colony formation result of sh-LINC00511#1-transfected TPC-1 and BCPAP cells at the indicated irradiation of 0, 2, 4, 6 or 8Gy. (F) Under 0 or 4Gy irradiation, cell apoptosis rates of TPC-1 and BCPAP cells with the treatment of sh-LINC00511#1 were individually assessed by flow cytometry. (G) Western blot analysis of PARP levels in sh-LINC00511#1-treated TPC-1 and BCPAP cells with 0 or 4Gy radiation. *P < .05, **P < .01.