DNA methyltransferase 1 inhibits O6-methylguanine-DNAmethyl-transferase-mediated cell growth and metastasis of hypopharyngeal squamous carcinoma

被引：2

作者：

Tian, Ruxian ^{[1
]}

Lv, Yayun ^{[1
]}

Yang, Xin ^{[1
]}

Cui, Limei ^{[1
]}

Wu, Xinxin ^{[1
]}

Liu, Chuan ^{[2
]}

Li, Jingjing ^{[3
]}

Yao, Yao ^{[1
]}

Yang, Yujuan ^{[1
]}

Mou, Yakui ^{[1
]}

Song, Xicheng ^{[1
]}

机构：

[1] Qingdao Univ, Affiliated Yantai Yuhuangding Hosp, Dept Otorhinolaryngol Head & Neck Surg, 20 East Yuhuangding Rd, Yantai 264000, Shandong, Peoples R China

[2] Chongqing Med Univ, Affiliated Hosp 1, Dept Otorhinolaryngol, Chongqing 40016, Peoples R China

[3] Binzhou Med Univ, Yantai Yuhuangding Hosp, Yantai 264000, Shandong, Peoples R China

来源：

ARCHIVES OF ORAL BIOLOGY | 2021年 / 128卷

关键词：

DNMT1; Hypopharyngeal squamous carcinoma; Cell growth; Metastasis; MGMT; PROGNOSTIC VALUE; DNMT1; PROTEIN; MGMT METHYLATION; EXPRESSION; CANCER; TUMOR; PROLIFERATION; GLIOBLASTOMA; METAANALYSIS; INVASION;

D O I：

10.1016/j.archoralbio.2021.105160

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

Objective: To explore the role of DNA methyltransferase 1 (DNMT1) in development and progression of hypopharyngeal squamous carcinoma. Design: A total of 32 hypopharyngeal squamous carcinoma biopsy samples and 20 normal tissue specimens were collected. Immunohistochemical staining, quantitative real-time polymerase chain reaction, and Western blot were performed for expression analysis. The mRNA and protein expression in the specimens and subcellular localization were analyzed. hypopharyngeal squamous carcinoma cells (FaDu) were used for small interfering RNA of DNMT1, and proliferation, cell cycle, and apoptosis were determined in the transfected cells. Furthermore, metastatic ability and methylation status of O-6-methylguanine-DNAmethyl-transferase (MGMT) promoter was assessed. Results: Our results showed that DNMT1 was overexpressed, while MGMT was down expressed in hypopharyngeal squamous carcinoma. DNMT1 overexpression and MGMT down expression were significantly associated with poorly differentiated tumors, lymph node metastasis, and clinical stage. DNMT1 and MGMT were majorly distributed in the nucleus. Furthermore, knockdown of DNMT1 inhibited proliferation and metastasis, induced apoptosis and G1 phase arrest in FaDu cells, and upregulated MGMT expression to reverse methylation status of MGMT promoter. Conclusions: This study for the first time demonstrated the clinical value and the role of DNMT1 and MGMT in the biological function of hypopharyngeal squamous carcinoma. This work suggested that DNMT1 might serve as a potential therapeutic target for patients with hypopharyngeal squamous carcinoma.

引用

页数：9

共 32 条

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