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Integrin ανβ6 Protein Expression and Prognosis in Solid Tumors: A Meta-Analysis
Alexandra Desnoyers1, Carlos González1,2,3,4,5, Pedro Pérez-Segura2
1Division of Medical Oncology and Hematology, Department of Medicine, Princess Margaret Cancer Centre, The University of Toronto, Toronto, ON, Canada.
Molecular Diagnosis & Therapy
|February 27, 2020
Summary
High ανβ6 integrin expression in solid tumors is linked to worse overall survival (OS). This finding highlights ανβ6 integrin as a potential prognostic marker and therapeutic target in various cancers.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Integrins are cell surface receptors mediating extracellular matrix interactions and intracellular signaling.
- Integrins, particularly ανβ6 integrin, are implicated in cancer progression, promoting migration, invasion, metastasis, and survival.
- ανβ6 integrin is frequently overexpressed in various solid tumors.
Purpose of the Study:
- To evaluate the prognostic impact of ανβ6 integrin protein expression on overall survival (OS) in patients with solid tumors.
- To synthesize existing evidence through a meta-analysis to determine the association between ανβ6 integrin expression and patient outcomes.
Main Methods:
- Systematic literature search of electronic databases for studies on ανβ6 integrin and OS.
- Meta-analysis of hazard ratios (HRs) using inverse variance and random effects models.
- Subgroup analyses based on tumor site, stage, immunohistochemistry (IHC) antibody, and HR extraction method; meta-regression to explore clinical variable influence.
Main Results:
- Seventeen studies including 5795 patients were analyzed.
- High ανβ6 integrin expression correlated with significantly worse OS (HR 1.65, 95% CI 1.32-2.06).
- Adverse outcomes were consistent across tumor sites, with strongest association in gastric cancer and weakest in head and neck cancer; no significant differences based on stage, IHC antibody, or analysis method.
Conclusions:
- Elevated ανβ6 integrin expression is associated with poorer survival outcomes in multiple solid tumors.
- ανβ6 integrin may serve as a valuable prognostic biomarker in oncology.
- Further prospective studies are needed to confirm the prognostic significance of ανβ6 integrin and explore its therapeutic potential.
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