SCUBE3 Exerts a Tumor-Promoting Effect in Tongue Squamous Cell Carcinoma by Promoting CEBPA Binding to the CCL2 Promoter

Author:

Zhu Minhui1ORCID,Ma Yi1ORCID,Wang Wei1ORCID,Li Meng1ORCID,Chen Shicai1ORCID,Liu Fei1ORCID,Shi Xiaoqiong1ORCID,Bi Hongsen2ORCID,Zhang Chen2ORCID,Nie Fangfei2ORCID,Zheng Hongliang1ORCID,Zhang Caiyun1ORCID

Affiliation:

1. 1Department of Otorhinolaryngology-Head and Neck Surgery, Changhai Hospital, Naval Medical University, Shanghai, P.R. China.

2. 2Department of Plastic Surgery, Peking University Third Hospital, Beijing, P.R. China.

Abstract

Abstract Tongue squamous cell carcinoma (TSCC) is the main pathologic subtype of oral cancer, and the current therapeutic effect is far from satisfactory. The signal peptide-CUB-EGF domain-containing protein 3 (SCUBE3) has been shown to be a tumor-promoting factor in several malignancies. However, little is known about the role of SCUBE3 in TSCC. In this study, we identified that SCUBE3 was highly expressed in TSCC. Clinically, high expression of SCUBE3 was positively associated with tumor stage and T stage of TSCC. Functionally, SCUBE3 silence remarkably restrained cell proliferation, migration, and invasion, induced apoptosis as well as cell cycle arrest in G2-phase, and weakened the tumorigenicity of TSCC cells in vivo. Mechanistically, SCUBE3 promoted the direct binding of CCAAT enhancer binding protein alpha (CEBPA) to C-C motif chemokine ligand 2 (CCL2) promoter in TSCC cells. Interestingly, CCL2 overexpression partially reversed the inhibitory effect of SCUBE3 deficiency on TSCC cell viability and migration. Moreover, STAT3 signaling contributed to CCL2-mediated phenotypes in TSCC cells. Implications: Our data revealed a tumor-promoting role for SCUBE3 in TSCC via the CEBPA/CCL2/STAT3 axis, which provided new insight into novel potential therapeutic target for TSCC.

Funder

National Natural Science Foundation of China

Publisher

American Association for Cancer Research (AACR)

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