Ku80 gene knockdown by the CRISPR/Cas9 technique affects the biological functions of human thyroid carcinoma cells.

Abstract:

:In the present study, to evaluate the role of Ku80 in thyroid carcinoma (TC), 86 thyroid tissue samples from patients with a spectrum of thyroid disorders were examined for protein levels of Ku80, nuclear factor‑κB (NF‑κB) and RET/TC by immunohistochemistry. Furthermore, in TC cells, Ku80 mRNA was detected by reverse transcription‑quantitative PCR analysis and silenced using the clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR‑associated protein 9 (Cas9) technique to assess its role. An antibody array was used to identify Ku80‑related regulatory genes. The protein levels of Ku80 in the TC tissues were significantly higher than those in non‑neoplastic adjacent tissue samples (P<0.01). The activation of NF‑kB and expression of RET/TC in the TC group were significantly increased (P<0.05) and were correlated with the protein expression of Ku80 (P<0.05). In papillary TC cells, the mRNA levels of Ku80 were high; Ku80 knockdown resulted in reductions in proliferation, invasion and colony formation, increased apoptosis, and reduced levels of proteins involved in MAPK signaling, cell proliferation and apoptosis. The high expression of Ku80 in TC was found to be associated with the expression of RET/TC and activation of NF‑κB, and Ku80 knockdown decreased the malignancy of TC cells.

journal_name

Oncol Rep

journal_title

Oncology reports

authors

Fan Y,Li J,Wei W,Fang H,Duan Y,Li N,Zhang Y,Yu J,Wang J

doi

10.3892/or.2019.7348

subject

Has Abstract

pub_date

2019-12-01 00:00:00

pages

2486-2498

issue

6

eissn

1021-335X

issn

1791-2431

journal_volume

42

pub_type

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