title: miR-135a acts as a tumor suppressor in gastric cancer in part by targeting KIFC1.
abstract: miR-135a was downregulated in the majority of human primary gastric cancer (GC) tissues and GC cell lines. Kinesin family member C1 (KIFC1) was significantly upregulated in GC tissues and cell lines and promoted GC development and progression. We searched for miR-135a targets by using MiRanda, TargetScan, and PicTar tools, and found that KIFC1 was a potential target of miR-135a. Based on these findings, we speculated that miR-135a might target KIFC1 to inhibit GC growth. We determined the expression of miR-135a and KIFC1 by quantitative real-time polymerase chain reaction and Western blot assays, respectively, and found downregulation of miR-135a and upregulation of KIFC1 in GC tissues and cell lines. Cell proliferation and apoptosis assays showed that knockdown of KIFC1 inhibited proliferation and promoted apoptosis of GC cells, and miR-135a mimics had similar effects on GC cell proliferation and apoptosis. Furthermore, we verified that KIFC1 was a direct target of miR-135a, which confirmed our speculation that the functional effect of miR-135a on GC cells, at least, in part, depends on KIFC1. These findings suggest that miR-135a has an important role in the suppression of GC and presents a novel mechanism of miRNA-mediated KIFC1 expression in cancer cells.
authors.affiliation: Department of Digestive Diseases, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, People's Republic of China.
authors.forename: Chuanlei
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Department of Digestive Diseases, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, People's Republic of China.
authors.forename: Xiaoqi
authors.initials: X
authors.lastname: Chen
authors.affiliation: Department of Digestive Diseases, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, People's Republic of China.
authors.forename: Xinju
authors.initials: X
authors.lastname: Chen
authors.affiliation: Department of Digestive Diseases, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, People's Republic of China.
authors.forename: Xinting
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Digestive Diseases, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, People's Republic of China.
authors.forename: Aiying
authors.initials: A
authors.lastname: Ji
authors.affiliation: Department of Chinese Traditional and Western Medicine, Henan Cancer Hospital, Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, People's Republic of China.
authors.forename: Lifeng
authors.initials: L
authors.lastname: Jiang
authors.affiliation: Department of Acquired Immune Deficiency Syndrome Treatment and Research Center, Key Laboratory of Viral Diseases Prevention and Treatment of Traditional Chinese Medicine of Henan Province, Zhengzhou, People's Republic of China.
authors.forename: Feng
authors.initials: F
authors.lastname: Sang
authors.affiliation: The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, People's Republic of China.
authors.forename: Fucheng
authors.initials: F
authors.lastname: Li
keywords: apoptosis; gastric cancer; kinesin family member C1; miR-135a; proliferation