Silencing Lin28 promotes apoptosis in colorectal cancer cells by upregulating let‑7c targeting of antiapoptotic BCL2L1.

Abstract:

:Colorectal cancer (CRC) remains a primary contributor to cancer‑associated mortality. The Lin28/let‑7 axis has previously been verified to participate in numerous pathophysiological processes involved in CRC. However, the potential roles and underlying mechanisms of this axis in apoptosis during CRC remain to be fully elucidated. The present study aimed to evaluate the role and reveal the molecular mechanisms of the Lin28/let‑7 axis in the apoptosis of CRC cells. An MTT assay was conducted to assess the cell viability of HCT116 and HT29 CRC cells, and caspase‑3 activity was analyzed to measure the apoptosis of CRC cells. Western blotting and reverse transcription‑quantitative polymerase chain reaction were performed to examine the expression of Lin28, B‑cell lymphoma 2 (Bcl‑2), Bcl‑2‑associated X protein, Bcl‑2‑like 1 (BCL2L1) and let‑7c. The present study demonstrated that Lin28 was upregulated whereas let‑7c was downregulated in CRC tissues and cell lines compared with normal tissues and NCM460 normal colon epithelial cells, respectively. Forced overexpression of let‑7c promoted apoptosis in CRC cells, which was at least partially mediated via the targeting of BCL2L1. Furthermore, knockdown of Lin28 decreased viability and promoted apoptosis in CRC cells, whereas this effect was attenuated by let‑7c inhibition. The findings of the present study suggest the involvement of the Lin28/let‑7c axis in apoptosis during CRC, and indicate the potential role of this pathway as a novel therapeutic target in CRC.

journal_name

Mol Med Rep

authors

Zhang H,Zong Y,Qiu G,Jia R,Xu X,Wang F,Wu D

doi

10.3892/mmr.2018.8483

subject

Has Abstract

pub_date

2018-04-01 00:00:00

pages

5143-5149

issue

4

eissn

1791-2997

issn

1791-3004

journal_volume

17

pub_type

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