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2017 ; 16
(1
): 46
Nephropedia Template TP
gab.com Text
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English Wikipedia
KCNMA1 cooperating with PTK2 is a novel tumor suppressor in gastric cancer and is
associated with disease outcome
#MMPMID28231797
Ma G
; Liu H
; Hua Q
; Wang M
; Du M
; Lin Y
; Ge Y
; Gong W
; Zhao Q
; Qiang F
; Tao G
; Zhang Z
; Chu H
Mol Cancer
2017[Feb]; 16
(1
): 46
PMID28231797
show ga
BACKGROUND: Inactivation of tumor suppressor genes by promoter hypermethylation
plays a key role in the tumorgenesis. It is necessary to uncover the detailed
pattern of whole genome-wide abnormal DNA methylation during the development of
gastric cancer (GC). METHOD: We performed a genome-wide methylation detection
using 12 paired of GC tissues and their corresponding normal tissues.
Methylation-specific PCR (MSP) and bisulphite sequencing (BSP) were used to
measure methylation status of specific CpG site. Based on the bioinformatic
analysis, the cell phenotypes and mouse model experiments were constructed to
detect effect of the target gene. Using the Kaplan-Meier survival curve, the
clinical value of KCNMA1 was assessed in GC patients. RESULTS: The CpG site
cg24113782 located at the promoter of KCNMA1 showed the most significant
difference, contributing to the commonly silenced KCNMA1in gastric cancer cells
and primary GC tissues. The promoter methylation of KCNMA1 was detected in 68.7%
(77/112) of tumor tissues, compared with 16.2% (18/112) of normal tissues
(P?0.001). The survival curve indicated that KCNMA1 hypermethylation was
significantly associated with the shortened survival in GC patients (P?=?0.036).
KCNMA1 significantly inhibited biological malignant behavior of gastric cancer
cell by inducing cell apoptosis in vitro, and suppressed xenograft tumor growth
in subcutaneous mouse models (both P?0.001). Furthermore, the anti-tumor effect
of KCNMA1was mediated through suppressing the expression of PTK2. CONCLUSION:
KCNMA1 is a critical tumor suppressor in gastric carcinogenesis and its
hypermethylation is an independent prognostic factor in patients with gastric
cancer.