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LMTK2 Inhibits Metastasis of Colon Cancer Cells Through p38 MAPK
Jie Lun1,2, Jinzhao Zhang3, Jianxin Xu1,2
1Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao, China.
Cancer Science
|August 4, 2026
Summary
Lemur tyrosine kinase 2 (LMTK2) suppresses colon cancer metastasis by inhibiting p38 activation. Low LMTK2 levels correlate with advanced metastasis, revealing its novel anti-metastatic role.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Metastasis is a primary cause of death in colon cancer patients.
- The role of Lemur tyrosine kinase 2 (LMTK2) in cancer metastasis remains largely undefined.
- LMTK2 is known to be involved in cell proliferation.
Purpose of the Study:
- To investigate the role of LMTK2 in colon cancer metastasis.
- To elucidate the molecular mechanisms underlying LMTK2's function in metastasis.
Main Methods:
- Analysis of LMTK2 expression in a large colon cancer cohort and clinical specimens.
- In vitro cell migration and invasion assays.
- In vivo metastasis mouse model.
- Investigation of the p38 MAPK signaling pathway.
Main Results:
- Low LMTK2 expression correlates with advanced metastatic status (M1) and increased metastasis rates.
- LMTK2 expression inversely correlates with pro-metastatic genes and positively with metastasis suppressors.
- LMTK2 inhibits colon cancer cell migration and invasion in vitro and suppresses metastasis in vivo.
- LMTK2 disrupts p38 MAPK activation by interfering with MKK3/6 interaction, independently of its kinase activity.
Conclusions:
- LMTK2 possesses a novel anti-metastatic function in colon cancer.
- LMTK2 inhibits metastasis by suppressing p38 MAPK signaling pathway activation.
- LMTK2's anti-metastatic effect is independent of its kinase activity, offering potential therapeutic avenues.
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