MiR-326/Sp1/KLF3: A novel regulatory axis in lung cancer progression.

Abstract:

OBJECTIVES:To investigate the function and regulatory mechanism of Krüppel-like factor 3 (KLF3) in lung cancer. MATERIALS AND METHODS:KLF3 expression was analysed by qRT-PCR and Western blot assays. The proliferation, migration, invasion, cycle and apoptosis were measured by CCK-8 and EdU, wound-healing and Transwell, and flow cytometry assays. The tumour growth was detected by nude mouse tumorigenesis assay. In addition, the interaction between KLF3 and Sp1 was accessed by luciferase reporter, EMSA and ChIP assay. JAK2, STAT3, PI3K and p-AKT levels were evaluated by Western blot and IHC assays. RESULTS:The results indicated that KLF3 expression was elevated in lung cancer tissues. Knockdown of KLF3 inhibited lung cancer cell proliferation, migration and invasion, and induced cell cycle arrest and apoptosis. In addition, the downregulation of KLF3 suppressed tumour growth in vivo. KLF3 was transcriptionally activated by Sp1. miR-326 could bind to 3'UTR of Sp1 but not KLF3 and decreased the accumulation of Sp1, which further indirectly reduced KLF3 expression and inactivated JAK2/STAT3 and PI3K/AKT signaling pathways in vitro and in vivo. CONCLUSIONS:Our data demonstrate that miR-326/Sp1/KLF3 regulatory axis is involved in the development of lung cancer, which hints the potential target for the further therapeutic strategy against lung cancer.

journal_name

Cell Prolif

journal_title

Cell proliferation

authors

Wang R,Xu J,Xu J,Zhu W,Qiu T,Li J,Zhang M,Wang Q,Xu T,Guo R,Lu K,Yin Y,Gu Y,Zhu L,Huang P,Liu P,Liu L,De W,Shu Y

doi

10.1111/cpr.12551

subject

Has Abstract

pub_date

2019-03-01 00:00:00

pages

e12551

issue

2

eissn

0960-7722

issn

1365-2184

journal_volume

52

pub_type

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