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Photostimulation by Femtosecond Laser Activates Extracellular-signal-regulated Kinase ERK Signaling or Mitochondrial Events in Target Cells
Published on: July 6, 2019
NIMA related kinase 2 promotes gastric cancer cell proliferation via ERK/MAPK signaling
Wei-Dong Fan1, Tao Chen2, Peng-Jun Liu3
1Department of Gastroenterology, the Affiliated Zhangjiagang Hospital of Soochow University, Zhangjiagang 215600, Jiangsu Province, China.
Background:
NIMA related kinase 2 (NEK2) is closely related to mitosis, and it is currently considered to be over-expressed frequently in many poorly prognostic cancers. However, the effect of the up-regulated NEK2 on cellular signaling in tumors, such as gastric cancer (GC), is con-fusing.
Aim:
To determine the role of the up-regulation of NEK2 in GC.
Methods:
To investigate the pathological significance of NEK2 in GC, the expression pattern of NEK2 in GC was investigated based on the "Oncomain" database and compared between 30 pairs of cancer samples and adjacent tissues. The co-expression of NEK2 and ERK in GC was analyzed using The Cancer Genome Atlas (TCGA) database and confirmed in clinical samples by quantitative real-time PCR (qRT-PCR), and the survival curve was also plotted. Western blot or qRT-PCR was used to analyze the effect of NEK2 on the phosphorylation levels of ERK and c-JUN in two GC cell lines (BGC823 and SGC7901) with NEK2 overexpression, and the expression of the downstream effector cyclin D1. Furthermore, CCK8, EdU incorporation assay, and flow cytometry were used to detect the proliferative ability of BGC823 and SGC7901 cells with stably silenced ERK.
Results:
NEK2 was significantly up-regulated in human GC tissues. ERK was significantly associated with NEK2 expression in human clinical specimens, and combined overexpression of NEK2 and ERK potentially forecasted a poor prognosis and survival in GC patients. NEK2 knockdown in GC cells inhibited ERK and c-JUN phosphory-lation and reduced the transcription of cyclin D1. More interestingly, NEK2 can rescue the inhibition of cellular viability, proliferation, and cell cycle progression due to ERK knockdown.
Conclusion:
Our results indicate that NEK2 plays a carcinogenic role in the malignant proliferation of GC cells via the ERK/MAPK signaling, which may be important for treatment and improving patient survival.
Insights
NIMA related kinase 2 (NEK2) promotes gastric cancer (GC) cell proliferation by activating the ERK/MAPK pathway. Targeting NEK2 may improve patient survival in GC.
Area of Science:
- Molecular oncology
- Cancer signaling pathways
Background:
- NIMA related kinase 2 (NEK2) is frequently over-expressed in cancers with poor prognoses.
- The role of NEK2 in gastric cancer (GC) signaling remains unclear.
- NEK2's association with mitosis suggests a potential role in cell proliferation.
Purpose of the Study:
- To elucidate the role of NEK2 up-regulation in gastric cancer.
- To investigate the impact of NEK2 on cellular signaling and proliferation in GC.
Main Methods:
- Analysis of NEK2 expression in GC tissues using the Oncomain database and clinical samples.
- Co-expression analysis of NEK2 and ERK using TCGA and qRT-PCR.
- Investigation of NEK2's effect on ERK/MAPK signaling components (ERK, c-JUN, cyclin D1) and GC cell proliferation assays.
Main Results:
- NEK2 is significantly up-regulated in human GC tissues.
- NEK2 overexpression correlates with ERK expression and predicts poor prognosis in GC patients.
- NEK2 knockdown inhibits ERK/MAPK signaling and cell proliferation; NEK2 can rescue ERK knockdown-induced inhibition.
Conclusions:
- NEK2 promotes malignant proliferation in GC cells through the ERK/MAPK signaling pathway.
- Targeting NEK2 represents a potential therapeutic strategy for improving GC patient survival.
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