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[The expression and significance of RKIP in lung squamous cell carcinoma tissues]
Haiyuan Xu1, Xin Wang, Wenxiang Shen
1Department of Medical Oncology, the First People's Hospital of Kunshan, Affiliated to Jiangsu University, Kunshan, China. alain15024@gmail.com
Background And Objective:
Raf kinase inhibitory protein (RKIP) belongs to the phosphatidylethanolamine binding protein (PEBP) family. RKIP is an endogenous inhibitor of the Raf-1-MEK1/2-ERK1/2 signaling pathway, NFkappaB signaling pathway and G protein coupled receptors signaling pathway. The aim of this study is to explore the expression of RKIP in lung squamous cell carcinoma, and the relationship between RKIP expression and clinical pathology of lung squamous cell carcinoma.
Methods:
The expression of RKIP mRNA was detected in 56 lung squamous cell carcinoma tissues and adjacent cancer tissues by RT-PCR. The expression level of RKIP protein was detected by Western blot. The positive rates of RKIP expression in cancer tissues and adjacent cancer tissues were analyzed.
Results:
RKIP mRNA positive expression rate in cancer tissues was significantly lower than that in adjacent cancer tissues (P < 0.05). The positive rate of RKIP mRNA expression in the cancer tissues with lymph node metastasis was significantly lower than that without lymph node metastasis (P < 0.05). RKIP mRNA expression has no remarkable correlation with age, sex, tumor differentiation and size (P > 0.05). RKIP protein expression in the cancer tissues was significantly lower than that in adjacent cancer tissues (P < 0.05).
Conclusions:
The deficiency of RKIP expression is positively correlated with carcinogenesis and invasion metastasis of lung squamous cell carcinoma.
Insights
Reduced expression of Raf kinase inhibitory protein (RKIP) is linked to lung squamous cell carcinoma development and metastasis. This suggests RKIP may play a role in inhibiting tumor progression.
Area of Science:
- Molecular biology
- Oncology
- Biochemistry
Context:
- Raf kinase inhibitory protein (RKIP) is a member of the phosphatidylethanolamine binding protein (PEBP) family.
- RKIP acts as an endogenous inhibitor for key signaling pathways including Raf-1-MEK1/2-ERK1/2, NF-kappaB, and G protein-coupled receptors.
- Dysregulation of these pathways is implicated in various cancers.
Purpose:
- To investigate the expression levels of RKIP in lung squamous cell carcinoma (LSCC).
- To determine the correlation between RKIP expression and the clinical pathological features of LSCC.
Summary:
- RKIP mRNA and protein expression were significantly lower in LSCC tissues compared to adjacent non-cancerous tissues.
- Lower RKIP mRNA expression correlated with lymph node metastasis in LSCC patients.
- No significant correlation was found between RKIP expression and age, sex, tumor differentiation, or size.
Impact:
- RKIP deficiency is associated with the initiation and metastatic potential of LSCC.
- These findings highlight RKIP as a potential biomarker for LSCC progression and metastasis.
- Understanding RKIP's role could lead to novel therapeutic strategies targeting LSCC.
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