Abstract
Purpose
We aimed to examine the expression levels of the genes encoding adenomatous polyposis coli (APC) 1, APC-2, Dickkopf related protein (DKK)-1, DKK-3, secreted frizzled-related protein (SFRP)-2, SFRP-4, and SFRP-5, which play roles in the Wnt signaling pathway, in lung adenocarcinoma and adjacent normal lung tissues and to evaluate their relationships with clinicopathologic factors.
Materials and methods
The expression levels of genes in formalin-fixed paraffin-embedded samples of tumor tissue and adjacent intact lung tissue from 57 patients who underwent surgery for lung adenocarcinoma between 2011 and 2018 were determined by real-time PCR analysis.
Results
The expression levels of the DKK-1 in tumor tissue, especially in stage I–II tumor tissue, were significantly suppressed compared to those in normal tissue (p < 0.025). Whereas DKK-1 expression was suppressed in the tumor tissue of patients with early-stage lung adenocarcinoma, expression of the SFRP-5 in these patients was significantly higher in tumor tissue than in normal tissue (p < 0.039).
Conclusion
In our study, opposing regulation was found between the SFRP-5 and DKK-1, which are known to be extracellular antagonists of the Wnt signaling pathway. The SFRP-5 was found to have an oncogenic role in adenocarcinoma development. Studies of the opposing regulation between these genes in early-stage lung adenocarcinoma may shed light on the mechanisms associated with the development of carcinogenesis. The relationships or interactions of these genes may serve as potential therapeutic targets.
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Abbreviations
- SFRP:
-
Secreted frizzled-related protein
- DKK:
-
Dickkopf-related protein
- FZD:
-
Frizzled receptor
- GSK3β:
-
Glycogen synthase kinase 3 beta
- LRP:
-
Lipoprotein receptor-related protein
- NSCLC:
-
Non-small cell lung cancer
- APC:
-
Adenomatous polyposis coli
- DVL:
-
Disheveled-related protein
- CK1α:
-
Casein-kinase 1α protein
- WIF:
-
Wnt inhibitory factor
- CSC:
-
Cancer stem cell
- EMT:
-
Epithelial-to-mesenchymal transition
- JNK:
-
C-Jun N-terminal kinase protein
- RYK:
-
Receptor tyrosine kinase protein
- ROS:
-
Reactive oxygen species
- ROR:
-
Receptor tyrosine kinase-like orphan receptor
- AXIN:
-
Axis inhibition protein
- TKI:
-
Tyrosine kinase receptor inhibitor
- EGFR:
-
Epidermal growth factor receptor
- BAX:
-
BCL2-associated X
- Bcl-2:
-
B-cell lymphoma
- KEGG:
-
Kyoto encyclopedia of genes and genomes
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Funding
This work was supported by Mugla Sıtkı Koçman University (Project Number 19/087/07/3/4).
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AZ: project administration, investigation, writing—original draft. NÖ: data curation, resources. SK: data curation, resources, English editing. KT: formal analysis. GTE: writing, review, editing. TMK: resources, analysis. LT: resources. EME: conceptualization, methodology.
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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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All procedures performed in our study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards The study protocol (no. 169) was approved by the Ethics Committee of Human Investigations of Muğla Sıtkı Koçman University on 13.12.2018.Declaration of competing interests.
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Zeybek, A., Öz, N., Kalemci, S. et al. The role of Wnt pathway antagonists in early-stage lung adenocarcinoma. Mol Biol Rep 49, 9–17 (2022). https://doi.org/10.1007/s11033-021-06759-2
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DOI: https://doi.org/10.1007/s11033-021-06759-2