Microbiomic subprofiles and MDR1 promoter methylation in head and neck squamous cell carcinoma

被引:50
作者
Bebek, Gurkan [1 ,4 ]
Bennett, Kristi L. [1 ]
Funchain, Pauline [1 ,3 ]
Campbell, Rebecca [1 ]
Seth, Rahul [2 ]
Scharpf, Joseph [2 ]
Burkey, Brian [2 ]
Eng, Charis [1 ,3 ,5 ,6 ]
机构
[1] Cleveland Clin, Genom Med Inst, Lerner Res Inst, Cleveland, OH 44195 USA
[2] Cleveland Clin, Head & Neck Inst, Cleveland, OH 44195 USA
[3] Cleveland Clin, Taussig Canc Inst, Cleveland, OH 44195 USA
[4] Case Western Reserve Univ, Sch Med, Ctr Prote & Bioinformat, Cleveland, OH 44116 USA
[5] Case Western Reserve Univ, Sch Med, Dept Genet, Cleveland, OH 44116 USA
[6] Case Western Reserve Univ, Sch Med, Case Comprehens Canc Ctr, Cleveland, OH 44116 USA
基金
美国国家卫生研究院;
关键词
HELICOBACTER-PYLORI INFECTION; GASTROINTESTINAL MICROFLORA; CANCER; INFLAMMATION; GUT;
D O I
10.1093/hmg/ddr593
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Clinical observations and epidemiologic studies suggest that the incidence of head and neck squamous cell carcinoma (HNSCC) correlates with dental hygiene, implying a role for bacteria-induced inflammation in its pathogenesis. Here we begin to explore the pilot hypothesis that specific microbial populations may contribute to HNSCC pathogenesis via epigenetic modifications in inflammatory- and HNSCC-associated genes. Microbiomic profiling by 16S rRNA sequencing of matched tumor and adjacent normal tissue specimens in 42 individuals with HNSCC demonstrate a significant association of specific bacterial subpopulations with HNSCC over normal tissue (P 0.01). Furthermore, microbial populations can separate tumors by tobacco status (P 0.008), but not by alcohol status (P 0.41). If our subhypothesis regarding a mechanistic link from microorganism to carcinogenesis via inflammation and consequent aberrant DNA methylation is correct, then we should see hypermethylation of relevant genes associate with specific microbiomic profiles. Methylation analysis in four genes (MDR1, IL8, RARB, TGFBR2) previously linked to HNSCC or inflammation shows significantly increased methylation in tumor samples compared with normal oral mucosa. Of these, MDR1 promoter methylation associates with specific microbiomic profiles in tumor over normal mucosa. Additionally, we report that MDR1 methylation correlates with regional nodal metastases in the context of two specific bacterial subpopulations, Enterobacteriaceae and Tenericutes (P 0.001 for each). These associations may lead to a different, and potentially more comprehensive, perspective on the pathogenesis of HNSCC, and support further exploration of mechanistic linkage and, if so, novel therapeutic strategies such as demethylating agents and probiotic adjuncts, particularly for patients with advanced or refractory disease.
引用
收藏
页码:1557 / 1565
页数:9
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