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CD133/PROM1のプロモーターハイパーメチル化は、頭頸部扁平上皮癌の独立した予後不良因子である
Promoter hypermethylation of CD133/PROM1 is an independent poor prognosis factor for head and neck squamous cell carcinoma.
PMID: 32176088 DOI: 10.1097/MD.0000000000019491.
抄録
PROM1は腫瘍幹細胞の同定や分離に重要な役割を果たしている。本研究では、PROM1プロモーターのメチル化と頭頸部扁平上皮癌(HNSCC)との関連性、診断・予後評価を目的として、Cancer Genome Atlas-HNSCおよびGene Expression Omnibusデータセットを用いてバイオインフォマティクス解析を行った。メチル化されたPROM1データに基づく受信機動作特性曲線下面積は0.799であった。さらに、PROM1メチル化亢進は、HNSCC患者において、不良な全生存(ハザード比[HR]:1.459、95%信頼区間[CI]:1.071~1.987、P"Zs_200A"="Zs_200A".016)および無再発生存(HR:1.729、95%CI:1.088~2.749、P"Zs_200A"="Zs_200A".021)を独立して予測していた。さらに、PROM1のメチル化は、そのmRNA発現と弱い負の相関を示した(Pearson r"Zs_200A"="Zs_200A"-0.148, P"Zs_200A"<"Zs_200A".001)。また、PROM1のメチル化亢進は、部分的にはHNSCCにおけるPROM1のダウンレギュレーションに寄与している可能性がある。
PROM1 has played a pivotal role in the identification and isolation of tumor stem cells. This study aimed to assess the association between PROM1 promoter methylation and head and neck squamous cell carcinoma (HNSCC), and its diagnostic and prognostic value.Bioinformatic analysis was performed using data from the Cancer Genome Atlas-HNSC and Gene Expression Omnibus datasets.The results showed that PROM1 promoter was hypermethylated in HNSCCs compared with normal head and neck tissues (P = 4.58E-37). The area under the receiver-operating characteristic curve based on methylated PROM1 data was 0.799. In addition, PROM1 hypermethylation independently predicted poor overall survival (hazard ratio [HR]: 1.459, 95% confidence interval [CI]: 1.071-1.987, P = .016) and recurrence-free survival (HR: 1.729, 95% CI: 1.088-2.749, P = .021) in HNSCC patients. Moreover, PROM1 methylation was weakly negatively correlated with its mRNA expression (Pearson r = -0.148, P < .001).In summary, our study reveals that methylated PROM1 might serve as a valuable diagnostic biomarker and predictor of poor survival for HNSCC patients. PROM1 hypermethylation might partially contribute to its downregulation in HNSCC.