oral squamous cell carcinoma, microfibrillar-associated protein 2, autophagy, Wnt/β-catenin pathway, in vivo, Biochemistry, QD415-436, Genetics, QH426-470

Microfibrillar-associated protein 2 (MFAP2) is a small glycoprotein that is involved in vascular development and metabolic disease. The present study aims to explore the regulatory role of MFAP2 in the development and progression of oral squamous cell carcinoma (OSCC), including the underlying mechanisms. MFAP2 expression and its association with the progression of OSCC are explored using bioinformatics. MFAP2 expression in OSCC tissues is detected by immunohistochemical staining. SCC15 cell migration, invasion, apoptosis, proliferation, and viability are detected by wound healing, Transwell, flow cytometry, colony formation, and cell counting kit-8 assays. An in vivo experiment is used to detect tumor formation. Western blot analysis is used to determine MFAP2’s regulatory role in autophagy and the Wnt/β-catenin signaling pathway. MFAP2 is highly expressed in SCC15 cells and OSCC tissues, which correlates positively with the poor prognosis of patients with OSCCs. Functionally, MFAP2 promotes oncogenic autophagy to increase cell invasion, migration, and proliferation but inhibits apoptosis in SCC15 cells and promotes tumor growth in vivo. Mechanistically, MFAP2 upregulates autophagy and Wnt/β-catenin signaling to stimulate OSCC development. Intriguingly, regulation of Wnt/β-catenin signaling dependent on autophagy contributes to the malignant behaviors of SCC15 cells. MFAP2 could serve as a novel biomarker for OSCC and could affect OSCC tumorigenesis and development via autophagic regulation of Wnt/β-catenin signaling.