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Ndon S, Singh A, Ha PK, Aswani J, Chan JYK, Xu MJ. Human Papillomavirus-Associated Oropharyngeal Cancer: Global Epidemiology and Public Policy Implications. Cancers (Basel) 2023; 15:4080. [PMID: 37627108 PMCID: PMC10452639 DOI: 10.3390/cancers15164080] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
Global trends in human papillomavirus (HPV)-associated head and neck cancers (HNC), specifically in the oropharynx subsite, have been dynamically changing, leading to new staging and treatment paradigms. Epidemiologic studies have noted regional variations in HPV-associated oropharyngeal squamous cell carcinoma (OPSCC). While HPV vaccination remains the main preventative approach, vaccination policy in relation to gender neutrality is heterogeneous and particularly sparse in low- and middle-income countries, where the burden of global cancer cases and HPV-associated HNC are not well-characterized in certain regions. This review summarizes the existing literature on regional variations of HPV-associated OPSCC and gender-neutral vaccine policies. Based on available data, the incidence of HPV-associated OPSCC is highest in North America, Europe, and Oceania. As of 2022, 122 of 195 (63%) World Health Organization (WHO) member states had incorporated HPV vaccinations nationally; of these, 41 of 122 (34%) member states have introduced gender-neutral vaccine coverage. Future research is needed to describe continued evolving trends in HPV-associated OPSCC, understand underlying risk factors leading to regional variation in disease, and implement gender-neutral policy more broadly.
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Affiliation(s)
- Sifon Ndon
- Department of Otolaryngology-Head and Neck Surgery, University of California San Francisco, San Francisco, CA 94115, USA
| | - Amritpal Singh
- School of Medicine, University of California San Francisco, San Francisco, CA 94143, USA
| | - Patrick K. Ha
- Department of Otolaryngology-Head and Neck Surgery, University of California San Francisco, San Francisco, CA 94115, USA
| | - Joyce Aswani
- Department of Surgery, University of Nairobi, Nairobi 00100, Kenya
| | - Jason Ying-Kuen Chan
- Department of Otorhinolaryngology, Head and Neck Surgery, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Mary Jue Xu
- Department of Otolaryngology-Head and Neck Surgery, University of California San Francisco, San Francisco, CA 94115, USA
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2
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Wang W, Li W, Zhang H. An Overview of DNA Methylation Indicators for the Course of Oral Precancer. Appl Bionics Biomech 2022; 2022:6468773. [PMID: 36060560 PMCID: PMC9439927 DOI: 10.1155/2022/6468773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/06/2022] [Accepted: 08/08/2022] [Indexed: 11/18/2022] Open
Abstract
DNA methylation is a physiologically epigenetic alteration that happens when a methyl group is introduced to a CpG dinucleotide in the gene-regulating sequence of DNA. However, the majority of oral cancers have a well-defined precancerous stage; there are few clinical and morphological parameters for detecting and signalling the progression of precancerous to malignant tumours. DNA methylation forms are dynamic and reversible, allowing them to adjust to environmental or therapeutic changes. We did an extensive investigation to compile the data supporting aberrant DNA methylation forms as a possible biomarker for prediction. According to two longitudinal studies, p16 hypermethylation was considerably higher in precancerous lesions that progressed to cancer than in lesions that shrank. Most of the studies examined for this study were tiny cross-sectional research with scant validation and inadequately specified control groups. Existing evidence suggests that DNA methylation sequences can be relevant as a diagnostic biomarker for OPS development; however, sample size and research design restrictions make it difficult to draw definitive conclusions. Strong studies, including extensive epigenome-wide methylation scans of OPS with longitudinal monitoring, are necessary in this study in order to corroborate the recently discovered signals and discover new risk loci and disease progression molecular pathways.
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Affiliation(s)
- Wenjing Wang
- The First Affiliated Hospital of Yangtze University, Department of Stomatology, The First People's Hospital of Jingzhou, Jingzhou 434000, China
| | - Wei Li
- The First Affiliated Hospital of Yangtze University, Department of Stomatology, The First People's Hospital of Jingzhou, Jingzhou 434000, China
| | - Hongyi Zhang
- The First Affiliated Hospital of Yangtze University, Department of Stomatology, The First People's Hospital of Jingzhou, Jingzhou 434000, China
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3
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Antra, Parashar P, Hungyo H, Jain A, Ahmad S, Tandon V. Unraveling molecular mechanisms of Head and neck cancer. Crit Rev Oncol Hematol 2022; 178:103778. [PMID: 35932993 DOI: 10.1016/j.critrevonc.2022.103778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 03/02/2022] [Accepted: 08/01/2022] [Indexed: 12/24/2022] Open
Abstract
Malignancies that develop from mucosal epithelium of the upper aerodigestive tract are known as head and neck squamous cell carcinomas (HNSCC). Heterogeneity, late stage diagnosis and high recurrence rate are big hurdles in head and neck treatment regimen. Presently, the biomarkers available for diagnosis and prognosis of HNSCC are based on smoking as the major risk habit. This review shed light on the differential environment of HNSCC in smokeless tobacco consuming Indian patients. Frequent mutation in genes involved in DNA repair pathway (p53), cell proliferation (PIK3CA, HRAS) and cell death (CASP8, FADD) are common in western population. On the contrary, the genes involved in metastasis (MMPs, YAP1), lymphocyte proliferation (TNFRSF4, CD80), cell-cell adhesion (DCC, EDNRB), miRNA processing (DROSHA) and inflammatory responses (TLR9, IL-9) are mutated in Indian HNSCC patients. Gene ontology enrichment analysis highlighted that responses to chemical stimulus, immune pathways and stress pathways are highly enriched in Indian patients.
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Affiliation(s)
- Antra
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067
| | - Palak Parashar
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067
| | - Hungharla Hungyo
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067
| | - Anuja Jain
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi 110067
| | - Shandar Ahmad
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi 110067
| | - Vibha Tandon
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067.
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4
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Patra S, Patil S, Das S, Bhutia SK. Epigenetic dysregulation in autophagy signaling as a driver of viral manifested oral carcinogenesis. Biochim Biophys Acta Mol Basis Dis 2022; 1868:166517. [DOI: 10.1016/j.bbadis.2022.166517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 07/15/2022] [Accepted: 08/02/2022] [Indexed: 12/24/2022]
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5
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The World of Oral Cancer and Its Risk Factors Viewed from the Aspect of MicroRNA Expression Patterns. Genes (Basel) 2022; 13:genes13040594. [PMID: 35456400 PMCID: PMC9027895 DOI: 10.3390/genes13040594] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/17/2022] [Accepted: 03/23/2022] [Indexed: 01/27/2023] Open
Abstract
Oral cancer is one of the leading causes of death worldwide, with a reported 5-year survival rate of around 50% after treatment. Epigenetic modifications are considered to have a key role in oral carcinogenesis due to histone modifications, aberrant DNA methylation, and altered expression of miRNAs. MicroRNAs (miRNAs) are small non-coding RNAs that have a key role in cancer development by regulating signaling pathways involved in carcinogenesis. MiRNA deregulation identified in oral cancer has led to the idea of using them as potential biomarkers for early diagnosis, prognosis, and the development of novel therapeutic strategies. In recent years, a key role has been observed for risk factors in preventing and treating this malignancy. The purpose of this review is to summarize the recent knowledge about the altered mechanisms of oral cancer due to risk factors and the role of miRNAs in these mechanisms.
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6
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Head and Neck Cancers Are Not Alike When Tarred with the Same Brush: An Epigenetic Perspective from the Cancerization Field to Prognosis. Cancers (Basel) 2021; 13:cancers13225630. [PMID: 34830785 PMCID: PMC8616074 DOI: 10.3390/cancers13225630] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/30/2021] [Accepted: 11/02/2021] [Indexed: 12/26/2022] Open
Abstract
Simple Summary Squamous cell carcinomas affect different head and neck subsites and, although these tumors arise from the same epithelial lining and share risk factors, they differ in terms of clinical behavior and molecular carcinogenesis mechanisms. Differences between HPV-negative and HPV-positive tumors are those most frequently explored, but further data suggest that the molecular heterogeneity observed among head and neck subsites may go beyond HPV infection. In this review, we explore how alterations of DNA methylation and microRNA expression contribute to head and neck squamous cell carcinoma (HNSCC) development and progression. The association of these epigenetic alterations with risk factor exposure, early carcinogenesis steps, transformation risk, and prognosis are described. Finally, we discuss the potential application of the use of epigenetic biomarkers in HNSCC. Abstract Head and neck squamous cell carcinomas (HNSCC) are among the ten most frequent types of cancer worldwide and, despite all efforts, are still diagnosed at late stages and show poor overall survival. Furthermore, HNSCC patients often experience relapses and the development of second primary tumors, as a consequence of the field cancerization process. Therefore, a better comprehension of the molecular mechanisms involved in HNSCC development and progression may enable diagnosis anticipation and provide valuable tools for prediction of prognosis and response to therapy. However, the different biological behavior of these tumors depending on the affected anatomical site and risk factor exposure, as well as the high genetic heterogeneity observed in HNSCC are major obstacles in this pursue. In this context, epigenetic alterations have been shown to be common in HNSCC, to discriminate the tumor anatomical subsites, to be responsive to risk factor exposure, and show promising results in biomarker development. Based on this, this review brings together the current knowledge on alterations of DNA methylation and microRNA expression in HNSCC natural history, focusing on how they contribute to each step of the process and on their applicability as biomarkers of exposure, HNSCC development, progression, and response to therapy.
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Li CC, Shen Z, Bavarian R, Yang F, Bhattacharya A. Oral Cancer: Genetics and the Role of Precision Medicine. Surg Oncol Clin N Am 2021; 29:127-144. [PMID: 31757309 DOI: 10.1016/j.soc.2019.08.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Oral squamous cell carcinoma (OSCC) is one of the leading cancers in the world. OSCC patients are managed with surgery and/or chemoradiation. Prognoses and survival rates are dismal, however, and have not improved for more than 20 years. Recently, the concept of precision medicine was introduced, and the introduction of targeted therapeutics demonstrated promising outcomes. This article reviews the current understanding of initiation, progression, and metastasis of OSCC from both genetic and epigenetic perspectives. In addition, the applications and integration of omics technologies in biomarker discovery and drug development for treating OSCC are reviewed.
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Affiliation(s)
- Chia-Cheng Li
- Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA.
| | - Zhen Shen
- Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA
| | - Roxanne Bavarian
- Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA; Division of Oral Medicine and Dentistry, Brigham and Women's Hospital, Francis Street, Boston, MA 02115, USA
| | - Fan Yang
- Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA
| | - Aditi Bhattacharya
- Department of Oral and Maxillofacial Surgery, NYU College of Dentistry, East 24th Street, New York, NY 10010, USA
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Salivary DNA Methylation as an Epigenetic Biomarker for Head and Neck Cancer. Part II: A Cancer Risk Meta-Analysis. J Pers Med 2021; 11:jpm11070606. [PMID: 34206840 PMCID: PMC8304899 DOI: 10.3390/jpm11070606] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/18/2021] [Accepted: 06/21/2021] [Indexed: 12/21/2022] Open
Abstract
Aberrant methylation of tumor suppressor genes has been reported as an important epigenetic silencer in head and neck cancer (HNC) pathogenesis. Here, we performed a comprehensive meta-analysis to evaluate the overall and specific impact of salivary gene promoter methylation on HNC risk. The methodological quality was assessed using the Newcastle–Ottawa scale (NOS). Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to evaluate the strength of the association and Egger’s and Begg’s tests were applied to detect publication bias. The frequency of salivary DNA promoter methylation was significantly higher in HNC patients than in healthy controls (OR: 8.34 (95% CI = 6.10–11.39; p < 0.01). The pooled ORs showed a significant association between specific tumor-related genes and HNC risk: p16 (3.75; 95% CI = 2.51–5.60), MGMT (5.72; 95% CI = 3.00–10.91), DAPK (5.34; 95% CI = 2.18–13.10), TIMP3 (3.42; 95% CI = 1.99–5.88), and RASSF1A (7.69; 95% CI = 3.88–15.23). Overall, our meta-analysis provides precise evidence on the association between salivary DNA promoter hypermethylation and HNC risk. Thus, detection of promoter DNA methylation in saliva is a potential biomarker for predicting HNC risk.
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9
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Hier J, Vachon O, Bernstein A, Ibrahim I, Mlynarek A, Hier M, Alaoui-Jamali MA, Maschietto M, da Silva SD. Portrait of DNA methylated genes predictive of poor prognosis in head and neck cancer and the implication for targeted therapy. Sci Rep 2021; 11:10012. [PMID: 33976322 PMCID: PMC8113272 DOI: 10.1038/s41598-021-89476-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 04/23/2021] [Indexed: 12/31/2022] Open
Abstract
In addition to chronic infection with human papilloma virus (HPV) and exposure to environmental carcinogens, genetic and epigenetic factors act as major risk factors for head and neck cancer (HNC) development and progression. Here, we conducted a systematic review in order to assess whether DNA hypermethylated genes are predictive of high risk of developing HNC and/or impact on survival and outcomes in non-HPV/non-tobacco/non-alcohol associated HNC. We identified 85 studies covering 32,187 subjects where the relationship between DNA methylation, risk factors and survival outcomes were addressed. Changes in DNA hypermethylation were identified for 120 genes. Interactome analysis revealed enrichment in complex regulatory pathways that coordinate cell cycle progression (CCNA1, SFN, ATM, GADD45A, CDK2NA, TP53, RB1 and RASSF1). However, not all these genes showed significant statistical association with alcohol consumption, tobacco and/or HPV infection in the multivariate analysis. Genes with the most robust HNC risk association included TIMP3, DCC, DAPK, CDH1, CCNA1, MGMT, P16, MINT31, CD44, RARβ. From these candidates, we further validated CD44 at translational level in an independent cohort of 100 patients with tongue cancer followed-up beyond 10 years. CD44 expression was associated with high-risk of tumor recurrence and metastasis (P = 0.01) in HPV-cases. In summary, genes regulated by methylation play a modulatory function in HNC susceptibility and it represent a critical therapeutic target to manage patients with advanced disease.
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Affiliation(s)
- Jessica Hier
- Department of Otolaryngology-Head and Neck Surgery, Lady Davis Institute for Medical Research and Segal Cancer Centre, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, H3T 1E2, Canada
| | - Olivia Vachon
- Department of Otolaryngology-Head and Neck Surgery, Lady Davis Institute for Medical Research and Segal Cancer Centre, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, H3T 1E2, Canada
| | - Allison Bernstein
- Department of Otolaryngology-Head and Neck Surgery, Lady Davis Institute for Medical Research and Segal Cancer Centre, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, H3T 1E2, Canada
| | - Iman Ibrahim
- Department of Otolaryngology-Head and Neck Surgery, Lady Davis Institute for Medical Research and Segal Cancer Centre, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, H3T 1E2, Canada
| | - Alex Mlynarek
- Department of Otolaryngology-Head and Neck Surgery, Lady Davis Institute for Medical Research and Segal Cancer Centre, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, H3T 1E2, Canada
| | - Michael Hier
- Department of Otolaryngology-Head and Neck Surgery, Lady Davis Institute for Medical Research and Segal Cancer Centre, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, H3T 1E2, Canada
| | - Moulay A Alaoui-Jamali
- Segal Cancer Centre of the Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, Montreal, QC, Canada
| | - Mariana Maschietto
- Department of Structural and Functional Biology, Institute of Biology, Universidade Estadual de Campinas (UNICAMP) and Boldrini Children's Center, Campinas, Sao Paulo, Brazil
| | - Sabrina Daniela da Silva
- Department of Otolaryngology-Head and Neck Surgery, Lady Davis Institute for Medical Research and Segal Cancer Centre, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, 3755 Côte Ste-Catherine Road, Montreal, QC, H3T 1E2, Canada. .,Segal Cancer Centre of the Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, Montreal, QC, Canada.
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10
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Herreros-Pomares A, Llorens C, Soriano B, Bagan L, Moreno A, Calabuig-Fariñas S, Jantus-Lewintre E, Bagan J. Differentially methylated genes in proliferative verrucous leukoplakia reveal potential malignant biomarkers for oral squamous cell carcinoma. Oral Oncol 2021; 116:105191. [PMID: 33657465 DOI: 10.1016/j.oraloncology.2021.105191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/31/2020] [Accepted: 01/13/2021] [Indexed: 01/03/2023]
Abstract
OBJECTIVES To explore the pathophysiology of proliferative verrucous leucoplakia (PVL) through a methylated DNA immunoprecipitation and high-throughput sequencing (MeDIP-seq) case-control study. MATERIALS AND METHODS Oral biopsies from ten PVL patients and five healthy individuals were obtained and used to compare their epigenetic patterns. Network biology methods and integrative analyses of MeDIP-seq and RNAseq data were applied to investigate functional relations among differentially methylated genes (DMGs). The value of selected genes as malignant biomarkers was evaluated in a large cohort of oral squamous cell carcinoma (OSCC) patients from TCGA. RESULTS A total of 4647 differentially methylated regions were found, with a prominent state of hypermethylation in PVL patients. At the gene level, differentially methylated regions (DMRs) covered 826 genes with distinct roles, including transcription factors and binding proteins with functions in cell adhesion, migration, proliferation, regulation of transcription, bone morphogenesis, and cell signalling. Network analysis revealed three major hubs, two of them collecting proteins related to the response of the patients to PVL and treatment and one hub collecting proteins related to PVL and cancer. The integrative analysis revealed 8 genes (ARTN, CD8A, GATA3, HOXD10, MYO7A, OSR2, PLCB1, and SPOCK2) significantly upregulated in PVL compared to control and 5 genes (ANKRD6, DLG2, GPX3, PITX2, and ZNF736) significantly downregulated. The status of de-regulation found for PVL patients was concordant with what was found for OSCC samples compared to normal adjacent tissue. CONCLUSION Our findings show the potential of methylation markers in PVL and suggest novel OSCC diagnostic biomarkers which may boost the development of novel epigenetic-based therapies.
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Affiliation(s)
- Alejandro Herreros-Pomares
- Molecular Oncology Laboratory, Fundación Hospital General Universitario de Valencia, Valencia, Spain; CIBERONC, Valencia, Spain
| | - Carlos Llorens
- Biotechvana, Parc Cientific, Universitat de València, Paterna, Valencia, Spain
| | - Beatriz Soriano
- Biotechvana, Parc Cientific, Universitat de València, Paterna, Valencia, Spain
| | - Leticia Bagan
- Medicina Oral Unit, Stomatology Department, Valencia University, Spain
| | - Andrea Moreno
- Molecular Oncology Laboratory, Fundación Hospital General Universitario de Valencia, Valencia, Spain; TRIAL Mixed Unit, Centro de Investigación Príncipe Felipe-Fundación para la Investigación del Hospital General Universitario de Valencia, Valencia, Spain
| | - Silvia Calabuig-Fariñas
- Molecular Oncology Laboratory, Fundación Hospital General Universitario de Valencia, Valencia, Spain; CIBERONC, Valencia, Spain; TRIAL Mixed Unit, Centro de Investigación Príncipe Felipe-Fundación para la Investigación del Hospital General Universitario de Valencia, Valencia, Spain; Department of Pathology, Universitat de València, Valencia, Spain
| | - Eloísa Jantus-Lewintre
- Molecular Oncology Laboratory, Fundación Hospital General Universitario de Valencia, Valencia, Spain; CIBERONC, Valencia, Spain; TRIAL Mixed Unit, Centro de Investigación Príncipe Felipe-Fundación para la Investigación del Hospital General Universitario de Valencia, Valencia, Spain; Department of Biotechnology, Universitat Politècnica de València, Valencia, Spain.
| | - José Bagan
- CIBERONC, Valencia, Spain; Medicina Oral Unit, Stomatology Department, Valencia University, Spain; Department of Stomatology and Maxillofacial Surgery, Hospital General Universitario de Valencia, Valencia, Spain.
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Hallikeri K, Sudhakaran A, Monteiro R. Immunohistochemical expression of P16 and β-catenin in oral submucous fibrosis and oral squamous cell carcinoma with or without coexistence of oral submucous fibrosis. CLINICAL CANCER INVESTIGATION JOURNAL 2021. [DOI: 10.4103/ccij.ccij_75_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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12
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Marthong L, Ghosh S, Palodhi A, Imran M, Shunyu NB, Maitra A, Ghosh S. Whole Genome DNA Methylation and Gene Expression Profiling of Oropharyngeal Cancer Patients in North-Eastern India: Identification of Epigenetically Altered Gene Expression Reveals Potential Biomarkers. Front Genet 2020; 11:986. [PMID: 33133131 PMCID: PMC7578381 DOI: 10.3389/fgene.2020.00986] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 08/05/2020] [Indexed: 12/31/2022] Open
Abstract
Oropharyngeal cancer is a subtype of head and neck squamous cell carcinoma that is associated with unique risk exposures like consumption of smokeless tobacco and areca nut and is highly prevalent in the northeastern region of India, especially Meghalaya. However, the underlying epigenetic and transcriptomic changes in this cancer type is yet to be delineated. We have undertaken a study on genome wide somatic alterations in the DNA methylation and transcriptome in oropharyngeal cancer patients from this region using genome wide techniques in paired tumors and adjacent normal tissues. By using integrative approaches, we have identified 194 epigenetically silenced and 241 epigenetically overexpressed genes in the tumor tissue of these patients. Pathways that are significantly enriched by these genes include the pathways of immune systems, such as the interleukin signaling pathways and Toll-like receptor signaling pathway. Also, osteoclast differentiation pathway was found to be epigenetically upregulated. The pathways enriched by the epigenetically downregulated genes were found to be predominantly those involved in xenobiotic metabolism and keratinization. Two major transcription factors - SPI1 and RUNX1 were identified as epigenetically dysregulated, which further modulates 129 downstream genes. Comparison of our observations with the head and neck cancer data from TCGA revealed distinct DNA methylation and gene expression landscapes which might be specific for oropharyngeal cancer. HPV DNA sequences were not detected in any of the tumor samples in RNA-Seq data. The results obtained in this study might provide improved understanding of the disease.
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Affiliation(s)
- Lastborn Marthong
- Department of Zoology, North Eastern Hill University (NEHU), Shillong, India
| | - Sahana Ghosh
- National Institute of Biomedical Genomics (NIBMG), Kalyani, India
| | - Arindam Palodhi
- National Institute of Biomedical Genomics (NIBMG), Kalyani, India
| | - Mohamed Imran
- National Institute of Biomedical Genomics (NIBMG), Kalyani, India
| | - Neizekhotuo Brian Shunyu
- Department of Otorhinolaryngology (ENT), North Eastern Indira Gandhi Regional Institute of Health and Medical Sciences (NEIGRIHMS), Shillong, India
| | - Arindam Maitra
- National Institute of Biomedical Genomics (NIBMG), Kalyani, India
| | - Srimoyee Ghosh
- Department of Zoology, North Eastern Hill University (NEHU), Shillong, India
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13
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Reis RSD, Santos JAD, Abreu PMD, Dettogni RS, Santos EDVWD, Stur E, Agostini LP, Anders QS, Alves LNR, Valle IBD, Lima MA, Souza ED, Podestá JRV, Zeidler SVV, Cordeiro-Silva MDF, Louro ID. Hypermethylation status of DAPK, MGMT and RUNX3 in HPV negative oral and oropharyngeal squamous cell carcinoma. Genet Mol Biol 2020; 43:e20190334. [PMID: 32870234 PMCID: PMC7452731 DOI: 10.1590/1678-4685-gmb-2019-0334] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 06/28/2020] [Indexed: 01/08/2023] Open
Abstract
Squamous cell carcinoma of the oral cavity and oropharynx is the sixth most common type of cancer in the world. During tumorigenesis, gene promoter hypermethylation is considered an important mechanism of transcription silencing of tumor suppressor genes, such as DAPK, MGMT and RUNX3. These genes participate in signaling pathways related to apoptosis, DNA repair and proliferation whose loss of expression is possibly associated with cancer development and progression. In order to investigate associations between hypermethylation and clinicopathological and prognostic parameters, promoter methylation was evaluated in 72 HPV negative oral and oropharyngeal tumors using methylation-specific PCR. Hypermethylation frequencies found for DAPK, MGMT and RUNX3 were 38.88%, 19.44% and 1.38% respectively. Patients with MGMT hypermethylation had a better 2-year overall survival compared to patients without methylation. Being MGMT a repair gene for alkylating agents, it could be a biomarker of treatment response for patients who are candidates for cisplatin chemotherapy, predicting drug resistance. In view of the considerable levels of hypermethylation in cancer cells and, for MGMT, its prognostic relevance, DAPK and MGMT show potential as epigenetic markers, in a way that additional studies may test its viability and efficacy in clinical management.
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Affiliation(s)
- Raquel Silva Dos Reis
- Universidade Federal do Espírito Santo, Departamento de Ciências Biológicas, Núcleo de Genética Humana e Molecular, Vitória, ES, Brazil
| | - Jéssica Aflávio Dos Santos
- Universidade Federal do Espírito Santo, Departamento de Ciências Biológicas, Núcleo de Genética Humana e Molecular, Vitória, ES, Brazil
| | - Priscila Marinho de Abreu
- Universidade Federal do Espírito Santo, Programa de Pós-Graduação em Biotecnologia, Vitória, ES, Brazil.,Universidade Federal do Espírito Santo, Departamento de Patologia, Laboratório de Patologia Molecular, Vitória, ES, Brazil
| | - Raquel Spinassé Dettogni
- Universidade Federal do Espírito Santo, Departamento de Ciências Biológicas, Núcleo de Genética Humana e Molecular, Vitória, ES, Brazil
| | | | - Elaine Stur
- Universidade Federal do Espírito Santo, Departamento de Ciências Biológicas, Núcleo de Genética Humana e Molecular, Vitória, ES, Brazil
| | - Lidiane Pignaton Agostini
- Universidade Federal do Espírito Santo, Departamento de Ciências Biológicas, Núcleo de Genética Humana e Molecular, Vitória, ES, Brazil
| | - Quézia Silva Anders
- Universidade Federal do Espírito Santo, Programa de Pós-Graduação em Ciências Fisiológicas, Vitória, ES, Brazil
| | - Lyvia Neves Rebello Alves
- Universidade Federal do Espírito Santo, Departamento de Ciências Biológicas, Núcleo de Genética Humana e Molecular, Vitória, ES, Brazil.,Universidade Federal do Espírito Santo, Programa de Pós-Graduação em Biotecnologia, Vitória, ES, Brazil
| | - Isabella Bittencourt do Valle
- Universidade Federal do Espírito Santo, Programa de Pós-Graduação em Biotecnologia, Vitória, ES, Brazil.,Universidade Federal do Espírito Santo, Departamento de Patologia, Laboratório de Patologia Molecular, Vitória, ES, Brazil
| | - Marília Arantes Lima
- Universidade Federal do Espírito Santo, Departamento de Patologia, Laboratório de Patologia Molecular, Vitória, ES, Brazil
| | - Evandro Duccini Souza
- Hospital Santa Rita de Cássia - SESA, Programa de Prevenção e Detecção Precoce do Câncer Bucal, Setor de Cirurgia de Cabeça e Pescoço, Vitória, ES, Brazil
| | - José Roberto Vasconcelos Podestá
- Hospital Santa Rita de Cássia - SESA, Programa de Prevenção e Detecção Precoce do Câncer Bucal, Setor de Cirurgia de Cabeça e Pescoço, Vitória, ES, Brazil
| | - Sandra Ventorin von Zeidler
- Universidade Federal do Espírito Santo, Programa de Pós-Graduação em Biotecnologia, Vitória, ES, Brazil.,Universidade Federal do Espírito Santo, Departamento de Patologia, Laboratório de Patologia Molecular, Vitória, ES, Brazil
| | - Melissa de Freitas Cordeiro-Silva
- Universidade Federal do Espírito Santo, Departamento de Ciências Biológicas, Núcleo de Genética Humana e Molecular, Vitória, ES, Brazil
| | - Iúri Drumond Louro
- Universidade Federal do Espírito Santo, Departamento de Ciências Biológicas, Núcleo de Genética Humana e Molecular, Vitória, ES, Brazil.,Universidade Federal do Espírito Santo, Programa de Pós-Graduação em Biotecnologia, Vitória, ES, Brazil
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14
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Renzi A, Morandi L, Lenzi J, Rigillo A, Bettini G, Bellei E, Giacomini A, Tinto D, Sabattini S. Analysis of DNA methylation and TP53 mutational status for differentiating feline oral squamous cell carcinoma from non-neoplastic mucosa: A preliminary study. Vet Comp Oncol 2020; 18:825-837. [PMID: 32506786 DOI: 10.1111/vco.12624] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 05/13/2020] [Accepted: 06/02/2020] [Indexed: 12/14/2022]
Abstract
Feline oral squamous cell carcinoma (FOSCC) is characterized by high local invasiveness and early bone lysis. The late diagnosis largely limits the efficacy of therapy and increases treatment-related morbidity. The aim of this exploratory study was to assess the methylation pattern of 10 candidate genes and TP53 mutational status in histologic samples of FOSCC. Results were compared with normal oral mucosa and oral inflammatory lesions, in order to establish a gene panel for FOSCC detection. For 10 cats, the above analyses were also performed on oral brushing samples, in order to explore the utility of these methods for screening purposes. Thirty-one FOSCC, 25 chronic inflammatory lesions and 12 controls were included. TP53 mutations were significantly more frequent in the FOSCC (68%) than in the non-neoplastic oral mucosa (3%; P <.001). Based on lasso regression analysis, a step-wise algorithm including TP53, FLI1, MiR124-1, KIF1A and MAGEC2 was proposed. The algorithm allowed to differentiate FOSCC with 94% sensitivity and 100% specificity (accuracy, 97%). When applying the proposed algorithm on 10 brushing samples, accuracy decreased to 80%. These results indicate that the altered DNA methylation of specific genes is present in FOSCC, together with a significant proportion of TP53 mutations. Such alterations are infrequent in normal oral mucosa and chronic stomatitis in cats, suggesting their involvement in feline oral carcinogenesis and their utility as diagnostic biomarkers. Further studies on a high number of brushing samples will be needed to assess the utility of a screening test for the early detection of FOSCC.
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Affiliation(s)
- Andrea Renzi
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Luca Morandi
- Department of Biomedical and Neuromotor Sciences, Functional MR Unit, IRCCS Istituto delle Scienze Neurologiche di Bologna, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Jacopo Lenzi
- Department of Biomedical and Neuromotor Sciences, Section of Hygiene, Public Health and Medical Statistics, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Antonella Rigillo
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Giuliano Bettini
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Emma Bellei
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Alessandra Giacomini
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Debora Tinto
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Silvia Sabattini
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy
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15
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Hsu PJ, Yan K, Shi H, Izumchenko E, Agrawal N. Molecular biology of oral cavity squamous cell carcinoma. Oral Oncol 2020; 102:104552. [PMID: 31918173 DOI: 10.1016/j.oraloncology.2019.104552] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/30/2019] [Accepted: 12/21/2019] [Indexed: 12/23/2022]
Abstract
Oral cavity squamous cell carcinoma (OCSCC) is a heterogeneous and complex disease that arises due to dysfunction of multiple molecular signaling pathways. Recent advances in high-throughput genetic sequencing technologies coupled with innovative analytical techniques have begun to characterize the molecular determinants driving OCSCC. An understanding of the key molecular signaling networks underlying the initiation and progression of is essential for informing treatment of the disease. In this chapter, we discuss recent findings of key genes altered in OCSCC and potential treatments targeting these genes.
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Affiliation(s)
- Phillip J Hsu
- Medical Scientist Training Program, The University of Chicago, Chicago, IL 60637, USA
| | - Kenneth Yan
- Section of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of Chicago Medicine, Chicago, IL 60637, USA
| | - Hailing Shi
- Department of Chemistry and Institute for Biophysical Dynamics, Howard Hughes Medical Institute, The University of Chicago, Chicago, IL 60637, USA
| | - Evgeny Izumchenko
- Section of Hematology Oncology, Department of Medicine, University of Chicago Medicine, Chicago, IL 60637, USA
| | - Nishant Agrawal
- Section of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of Chicago Medicine, Chicago, IL 60637, USA.
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16
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Potential of Melatonin as Adjuvant Therapy of Oral Cancer in the Era of Epigenomics. Cancers (Basel) 2019; 11:cancers11111712. [PMID: 31684096 PMCID: PMC6895876 DOI: 10.3390/cancers11111712] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/16/2019] [Accepted: 10/31/2019] [Indexed: 02/06/2023] Open
Abstract
The wide variety of epigenetic controls available is rapidly expanding the knowledge of molecular biology even overflowing it. At the same time, it can illuminate unsuspected ways of understanding the etiology of cancer. New emerging therapeutic horizons, then, promise to overcome the current antitumor strategies need. The translational utility of this complexity is particularly welcome in oral cancer (OC), in which natural history is alarmingly disappointing due to the invasive and mutilating surgery, the high relapsing rate, the poor quality of life and the reduced survival after diagnosis. Melatonin activates protective receptor-dependent and receptor-independent processes that prevent tissue cancerisation and inhibit progressive tumor malignancy and metastasis. Related evidence has shown that melatonin pleiotropy encompasses gene expression regulation through all the three best-characterized epigenetic mechanisms: DNA methylation, chromatin modification, and non-coding RNA. OC has received less attention than other cancers despite prognosis is usually negative and there are no significant therapy improvements recorded in the past decade. However, a large research effort is being carried out to elucidate how melatonin´s machinery can prevent epigenetic insults that lead to cancer. In the light of recent findings, a comprehensive examination of biochemistry through which melatonin may reverse epigenetic aberrations in OC is an extraordinary opportunity to take a step forward in the clinical management of patients.
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17
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Sánchez‐Siles M, Aliaga‐Sánchez A, Medina S, Adoamnei E, Fernández‐Ruiz JA, Pelegrín‐Hernández JP, Corno‐Caparrós A, Rosa‐Salazar V, Camacho‐Alonso F. Genotyping of the C>T allele of rs16906252, predictor of O16‐methylguanine‐DNA methyltransferase (MGMT) promoter methylation status, in erosive atrophic lesions of oral lichen planus. Int J Dermatol 2019; 58:1078-1082. [DOI: 10.1111/ijd.14473] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 02/18/2019] [Accepted: 04/11/2019] [Indexed: 12/11/2022]
Affiliation(s)
| | - Alfonso Aliaga‐Sánchez
- Oral and Maxillofacial Surgery Reina Sofia Hospital Murcia Spain
- Department of Oral Surgery University of Murcia Murcia Spain
| | - Sonia Medina
- Department of Food Science and Technology CEBAS‐CSIC Murcia Spain
| | - Evdochia Adoamnei
- Department of Public Health Sciences University of Murcia Murcia Spain
| | | | | | | | - Vladimir Rosa‐Salazar
- Tromboembolic Disease Unit/Short Stay Unit Virgen de la Arrixaca University Hospital Murcia Spain
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18
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Abstract
PURPOSE OF REVIEW The present review aims to describe the epigenetic alterations observed in oral cancer linked to the exposure to alcohol and/or tobacco. RECENT FINDINGS Recent findings emphasize the importance of epigenetics in oral cancer progression and in how risk factors (as tobacco and alcohol) affect the basal epigenetic profiles. Deeper techniques and detailed approaches allowed the perception that individual CG changes and even subtle changes may represent important epigenetic alterations resulting in expression changes and other carcinogenic consequences. New classes of epigenetic alterations including noncoding RNAs have been gaining attention. SUMMARY Many epigenetic alterations have been described in oral carcinoma progression induced by tobacco and/or alcohol, including: promoter hypermethylation in genes with tumor suppressive activity, global (genome-wide) hypomethylation, change in methylation patterns throughout the genes, alteration in noncoding RNAs, and histones modifications. These changes represent progress in the knowledge of how these risk factors act in a molecular level. There is an urgent need for large independent studies to move these potential makers further and validate them to identify risk assessment, early diagnostic markers, and therapeutic targets, as well as to be the base for prevention and intervention strategies.
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19
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Jiang X, Wu J, Wang J, Huang R. Tobacco and oral squamous cell carcinoma: A review of carcinogenic pathways. Tob Induc Dis 2019; 17:29. [PMID: 31582940 PMCID: PMC6752112 DOI: 10.18332/tid/105844] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 02/18/2019] [Accepted: 03/20/2019] [Indexed: 02/05/2023] Open
Abstract
INTRODUCTION Tobacco is one of the most important risk factors for premature death globally. More than 60 toxic chemicals in tobacco can invade the body’s various systems. Oral squamous cell carcinoma (OSCC) is a pathological type of oral cancer, accounting for over 90% of oral cancers. A vast quantity of scientific, clinical and epidemiological data shows that tobacco is associated with the development of oral squamous cell carcinoma, and its carcinogenic pathways may be complicated. METHODS We conducted a thorough electronic search by Cochrane, EMBASE and PubMed to identify relevant studies. Studies published up to the end of October 2018 were included. After assessing and selecting articles based on eligibility criteria, studies were classified and elaborated according to the pathogenesis. RESULTS Tobacco as an important risk factor can cause epigenetic alteration of oral epithelial cells, inhibit multiple systemic immune functions of the host, and its toxic metabolites can cause oxidative stress on tissues and induce OSCC. In addition, some specific viruses such as EBV and HPV are thought to play a role in the development of OSCC. CONCLUSIONS Oral cancer ranks eighth among the most common causes of cancer-related deaths worldwide, and tobacco is one the most important carcinogenic factors of OSCC. This review of the literature attempts to provide directions and ideas for future related research, and emphasizes the need for efforts to reduce tobacco consumption.
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Affiliation(s)
- Xiaoge Jiang
- Department of Pediatric Dentistry, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jiaxin Wu
- Department of Pediatric Dentistry, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jiexue Wang
- Department of Pediatric Dentistry, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ruijie Huang
- Department of Pediatric Dentistry, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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20
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Strzelczyk JK, Krakowczyk Ł, Owczarek AJ. Methylation status of SFRP1, SFRP2, RASSF1A, RARβ and DAPK1 genes in patients with oral squamous cell carcinoma. Arch Oral Biol 2018; 98:265-272. [PMID: 30576962 DOI: 10.1016/j.archoralbio.2018.12.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 11/20/2018] [Accepted: 12/02/2018] [Indexed: 12/24/2022]
Abstract
Our study assessed the methylation status of the SFRP1, SFRP2, RASSF1A, RARβ and DAPK1 genes, which are associated with epigenetic silencing in cancers. In a group of 75 patients with oral squamous cell carcinoma, aberrant methylation was detected using methylation-specific PCR in tumours and matched margins. Our results showed significantly higher methylation frequency in tumours than in surgical margin of SFRP2 (26.6% vs 11.9%, p < 0.05) and DAPK1 (65.3% vs 41.3%, p < 0.01) genes. Moreover, methylation of the SFRP1 and DAPK1 genes was associated with older age. Advanced tumour stages were associated with lower rates of SFRP1 gene methylation. Decreased methylation levels of the SFRP2 and RASSF1A genes were associated with positive N stage. On the contrary, lymph node metastasis were associated with higher methylation rates of RARβ and DAPK1 genes. Patients with a familial history of cancer were associated with more frequently methylated SFRP1, SFRP2 and DAPK1 genes. Hypermethylation of DAPK1 was associated with decreased risk of death in patients. Our results are suggestive, although not conclusive, that some epigenetic changes, especially frequent hypermethylation of SFRP2 and DAPK1 genes, can be useful as potential diagnostic biomarkers of oral cavity cancer. Moreover, estimating the methylation status in surgical margins could become an additional strategy for more accurate treatment methods. Further efforts are needed to identify and validate this finding on a larger patient group and using new advanced methylation testing methods.
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Affiliation(s)
- Joanna Katarzyna Strzelczyk
- Department of Medical and Molecular Biology, School of Medicine with the Division of Dentistry in Zabrze, Jordana 19 Str., 41-808 Zabrze, Medical University of Silesia in Katowice, Poland.
| | - Łukasz Krakowczyk
- Clinic of Oncological and Reconstructive Surgery, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice Branch, Wybrzeże Armii Krajowej 15 Str., 44-101 Gliwice, Poland.
| | - Aleksander Jerzy Owczarek
- Department of Statistics, Department of Instrumental Analysis, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Ostrogórska 30 Str., 41-200 Sosnowiec, Medical University of Silesia in Katowice, Poland.
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21
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Villa A, Sonis S. Oral leukoplakia remains a challenging condition. Oral Dis 2018; 24:179-183. [PMID: 29480606 DOI: 10.1111/odi.12781] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 09/14/2017] [Indexed: 12/19/2022]
Abstract
Crispian Scully had many interests in the realm of oral diseases. But oral leukoplakia was one that piqued his curiosity when he was still an academic neophyte and remained a topic which he studied throughout his enormously productive career. It is easy to understand why. While the clinical manifestations of oral leukoplakia are common, we still do not fully understand why one version of the condition is benign, while another, similar in appearance, progresses to a malignancy. The diagnosis of oral leukoplakia is based on expert clinical and histopathological examamination. Management and treatment of leukoplakia remain challenging especially for large lesions and the proliferative subtype. This review aims to provide a general overview on leukoplakia, explore current challenges in its diagnosis and management and discuss the opportunities to better understand the condition.
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Affiliation(s)
- A Villa
- Division of Oral Medicine and Dentistry, Brigham and Women's Hospital, Dana Farber Cancer Institute, Boston, MA, USA.,Department of Oral Medicine Infection and Immunity, Harvard School of Dental Medicine, Boston, MA, USA
| | - S Sonis
- Division of Oral Medicine and Dentistry, Brigham and Women's Hospital, Dana Farber Cancer Institute, Boston, MA, USA.,Department of Oral Medicine Infection and Immunity, Harvard School of Dental Medicine, Boston, MA, USA.,Biomodels LLC, Watertown, MA, USA
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22
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Abstract
Oral squamous cell carcinoma (OSCC) is one of the leading cancers in the world. OSCC patients are managed with surgery and/or chemoradiation. Prognoses and survival rates are dismal, however, and have not improved for more than 20 years. Recently, the concept of precision medicine was introduced, and the introduction of targeted therapeutics demonstrated promising outcomes. This article reviews the current understanding of initiation, progression, and metastasis of OSCC from both genetic and epigenetic perspectives. In addition, the applications and integration of omics technologies in biomarker discovery and drug development for treating OSCC are reviewed.
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23
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Nikitakis NG, Pentenero M, Georgaki M, Poh CF, Peterson DE, Edwards P, Lingen M, Sauk JJ. Molecular markers associated with development and progression of potentially premalignant oral epithelial lesions: Current knowledge and future implications. Oral Surg Oral Med Oral Pathol Oral Radiol 2018; 125:650-669. [DOI: 10.1016/j.oooo.2018.03.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 03/26/2018] [Accepted: 03/26/2018] [Indexed: 12/21/2022]
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24
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Current Insights into Oral Cancer Epigenetics. Int J Mol Sci 2018; 19:ijms19030670. [PMID: 29495520 PMCID: PMC5877531 DOI: 10.3390/ijms19030670] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 02/20/2018] [Accepted: 02/22/2018] [Indexed: 12/30/2022] Open
Abstract
Epigenetic modifications have emerged into one of the cancer hallmarks, replacing the concept of malignant pathologies as being solely genetic-based conditions. The epigenetic landscape is responsible for normal development but also for the heterogeneity among tissues in terms of gene expression patterns. Dysregulation in these mechanisms has been associated with disease stage, and increased attention is now granted to cancer in order to take advantage of these modifications in terms of novel therapeutic strategies or diagnosis/prognosis tools. Oral cancer has also been subjected to epigenetic analysis with numerous studies revealing that the development and progression of this malignancy are partially induced by an altered epigenetic substrate together with genetic alterations and prolonged exposure to environmental risk factors. The present review summarizes the most important epigenetic modifications associated with oral cancer and also their potential to be used as new therapeutic targets.
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25
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Ji X, Guan C, Jiang X, Li H. Diagnostic accuracy of DNA methylation for head and neck cancer varies by sample type and number of markers tested. Oncotarget 2018; 7:80019-80032. [PMID: 27683120 PMCID: PMC5346768 DOI: 10.18632/oncotarget.12219] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Accepted: 09/02/2016] [Indexed: 11/25/2022] Open
Abstract
Abnormal methylation of certain cancer related genes strongly predicts a diagnosis of head and neck cancer (HNC), while the predictive power of methylation of other DNA markers for HNC remains unclear. To systemically assess the diagnostic value of DNA methylation patterns for HNC and the effect of methylation platform techniques and sample types, we performed a PubMed search for studies of the correlation between DNA methylation and HNC completed before July 2016, and extracted the sensitivity and specificity for methylated biomarkers. Across these studies, DNA methylation showed high sensitivity for diagnosing HNC in solid tissue (0.57), and high specificity in saliva (0.89). Area under the curve (AUC) from summary receiver operating characteristic (SROC) curves revealed that DNA methylation had more diagnostic power in solid tissue (AUC = 0.82) than saliva (AUC = 0.80) or blood (AUC = 0.77). Combinations of multiple methylated genes were more sensitive diagnostic markers than single methylated genes. Our results suggest that the diagnostic accuracy of methylated biomarkers for HNC varied by sample type and were most accurate when results from multiple sample types were considered.
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Affiliation(s)
- Xu Ji
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Chao Guan
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Xuejun Jiang
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Hong Li
- Department of Otorhinolaryngology Head and Neck Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, 110032, China
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26
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D'Souza W, Saranath D. OMICS, Oral Cancer Molecular Landscapes, and Clinical Practice. ACTA ACUST UNITED AC 2017; 21:689-703. [DOI: 10.1089/omi.2017.0146] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Wendy D'Souza
- Department of Biological Sciences, Sunandan Divatia School of Science, SVKM's NMIMS (Deemed-to-be) University, Mumbai, India
| | - Dhananjaya Saranath
- Department of Biological Sciences, Sunandan Divatia School of Science, SVKM's NMIMS (Deemed-to-be) University, Mumbai, India
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27
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Metabolic Phase I (CYPs) and Phase II (GSTs) Gene Polymorphisms and Their Interaction with Environmental Factors in Nasopharyngeal Cancer from the Ethnic Population of Northeast India. Pathol Oncol Res 2017; 25:33-44. [PMID: 28952035 DOI: 10.1007/s12253-017-0309-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 09/13/2017] [Indexed: 01/06/2023]
Abstract
Multiple genetic and environmental factors and their interaction are believed to contribute in the pathogenesis of Nasopharyngeal Cancer (NPC). We investigate the role of Metabolic Phase I (CYPs) and Phase II (GSTs) gene polymorphisms, gene-gene and gene-environmental interaction in modulating the susceptibility to NPC in Northeast India. To determine the association of metabolic gene polymorphisms and environmental habits, 123 cases and 189 controls blood/swab samples were used for PCR and confirmed by Sanger sequencing. Analysis for GSTM1 and GSTT1 gene polymorphism was done by multiplex PCR. The T3801C in the 3'- flanking region of CYP1A1 gene was detected by PCR-RFLP method. The Logistic regression analysis was used to estimate odds ratios (OR) and 95% confidence intervals (95% CI). The GSTM1 null genotype alone (OR = 2.76) was significantly associated with NPC risk (P < 0.0001). The combinations of GSTM1 null and GSTT1 null genotypes also higher, 3.77 fold (P < 0.0001), risk of NPC, while GSTM1 null genotype along with CYP1A1 T3801C TC + CC genotype had 3.22 (P = 0.001) fold risk. The most remarkable risk was seen among individual carrying GSTM1 null, GSTT1 null genotypes and CYP1A1 T3801C TC + CC genotypes (OR = 5.71, P = 0.001). Further; analyses demonstrate an enhanced risk of NPC in smoked meat (OR = 5.56, P < 0.0001) and fermented fish consumers (OR = 5.73, P < 0.0001) carrying GSTM1 null genotype. An elevated risk of NPC was noted in smokers (OR = 12.67, P < 0.0001) and chewers (OR = 5.68, P < 0.0001) with GSTM1 null genotype. However, smokers had the highest risk of NPC among individuals carrying GSTT1 null genotype (OR = 4.46, P = 0.001) or CYP1A1 T3801C TC + CC genotype (OR = 7.13, P < 0.0001). The association of null genotypes and mutations of metabolic neutralizing genes along with the environmental habits (tobacco smokers and chewers, smoke meat, fermented fishes) can be used as a possible biomarker for early detection and preventive measure of NPC.
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28
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Jayaprakash C, Radhakrishnan R, Ray S, Satyamoorthy K. Promoter methylation of MGMT in oral carcinoma: A population-based study and meta-analysis. Arch Oral Biol 2017; 80:197-208. [DOI: 10.1016/j.archoralbio.2017.04.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 03/02/2017] [Accepted: 04/07/2017] [Indexed: 12/17/2022]
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29
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Murthy V, Calcuttawala A, Chadha K, d’Cruz A, Krishnamurthy A, Mallick I, Nair S, Teni T, Pawar S, Talapatra K, Patil A, Bhatt A, Chatterjee S, Swain M, Narayanan P, Ghadyalpatil N, Singhal M, Kuriakose M, Prabhash K, Agarwal J, Parikh P. Human papillomavirus in head and neck cancer in India: Current status and consensus recommendations. South Asian J Cancer 2017; 6:93-98. [PMID: 28975111 PMCID: PMC5615888 DOI: 10.4103/sajc.sajc_96_17] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Human papillomavirus (HPV) associated head and neck squamous cell cancers (HNSCC) have become increasingly common in the West, but the same cannot be said about India. These cancers have a different biology and confer a better prognosis, however, its current role in the management of patients in India is not clearly defined. At the 35th Indian Cooperative Oncology Network conference held in September 2016, a panel of radiation, surgical and medical oncologists, pathologists, and basic scientists from across the country having experience in clinical research with respect to HPV in HNSCC reviewed the available literature from India. All the ideas and facts were thereafter collated in this report. Various topics of controversy in dealing with the diagnosis and management of HPV-associated HNSCC have been highlighted in this report in context to the Indian scenario. Furthermore, the prevalence of the same and its association with tobacco and high-risk sexual behavior has been touched on. Conclusively, a set of recommendations has been proposed by the panel to guide the practicing oncologists of the country while dealing with HPV-associated HNSCC.
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Affiliation(s)
- Vedang Murthy
- Department of Radiation Oncology, Tata Memorial Centre, Mumbai, Maharashtra, India
| | - Adnan Calcuttawala
- Department of Radiation Oncology, Tata Memorial Centre, Mumbai, Maharashtra, India
| | - Kirti Chadha
- Department of Oncopathology, Metropolis Healthcare Ltd., Mumbai, Maharashtra, India
| | - Anil d’Cruz
- Department of Surgical Oncology, Cancer Institute (WIA), Chennai, Tamil Nadu, India
| | - Arvind Krishnamurthy
- Department of Radiation Oncology, Tata Medical Centre, Kolkata, West Bengal, India
| | - Indranil Mallick
- Department of Radiation Oncology, Tata Medical Centre, Kolkata, West Bengal, India
| | - Sudhir Nair
- Department of Head and Neck Surgery, Tata Memorial Centre, Mumbai, Maharashtra, India
| | - Tanuja Teni
- Teni Lab, Advanced Centre for Treatment, Research and Education in Cancer, Mumbai, Maharashtra, India
| | - Sagar Pawar
- Teni Lab, Advanced Centre for Treatment, Research and Education in Cancer, Mumbai, Maharashtra, India
| | | | - Asawari Patil
- Department of Pathology, Tata Memorial Centre, Mumbai, Maharashtra, India
| | - Amit Bhatt
- Department of Medical Oncology, Avinash Cancer Clinic, Pune, Maharashtra, India
| | - Sanjoy Chatterjee
- Department of Radiation Oncology, Tata Medical Centre, Kolkata, West Bengal, India
| | - Monali Swain
- Department of Radiation Oncology, Tata Memorial Centre, Mumbai, Maharashtra, India
| | - Prasad Narayanan
- Department of Medical Oncology, Cytecare Cancer Hospital, Bengaluru, Karnataka, India
| | - Nikhil Ghadyalpatil
- Department of Medical Oncology, Yashoda Cancer Institute, Somajiguda, Hyderabad, Telangana, India
| | - Manish Singhal
- Department of Medical Oncology, Indraprastha Apollo Hospitals, New Delhi, India
| | - Moni Kuriakose
- Department of Surgical Oncology, Mazumdar-Shaw Cancer Center, Bengaluru, Karnataka, India
| | - Kumar Prabhash
- Department of Medical Oncology, Tata Memorial Centre, Mumbai, Maharashtra, India
| | - Jaiprakash Agarwal
- Department of Radiation Oncology, Tata Memorial Centre, Mumbai, Maharashtra, India
| | - Purvish Parikh
- Department of Medical Oncology, Asian Institute of Oncology, Mumbai, Maharashtra, India
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Biological significance of 5-hydroxymethylcytosine in oral epithelial dysplasia and oral squamous cell carcinoma. Oral Surg Oral Med Oral Pathol Oral Radiol 2017; 125:59-73.e2. [PMID: 28743666 DOI: 10.1016/j.oooo.2017.06.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 05/27/2017] [Accepted: 06/06/2017] [Indexed: 02/07/2023]
Abstract
OBJECTIVES The aim of this study was to determine the levels of 5-hydroxylmethylcytosine (5-hmC) in oral epithelial dysplasia (OED) and oral squamous cell carcinoma (OSCC) compared with those in benign, reactive inflammatory lesions and to explore whether DNA hydroxymethylation may serve as a novel biomarker for early diagnosis and prognosis of OSCC. STUDY DESIGN The study included normal mucosa from uninvolved margins of 9 fibromas, 10 oral lichen planus, 15 OED, and 23 OSCC. Cultured human keratinocyte lines from benign oral mucosa, OED, and OSCC, as well as a murine model in which OSCC was induced with 4-nitroquinoline-1-oxide, were also evaluated. RESULTS Progressive loss of 5-hmC from benign oral mucosal lesions to OED and OSCC was documented in patient samples. Decreased levels in 5-hmC that typify OED and OSCC were also detectable in human cell lines. Moreover, we characterized similar alterations in 5-hmC in an animal model of OED/OSCC. CONCLUSIONS This study demonstrated that 5-hmC distinguishes OED and OSCC from benign lesions with high sensitivity and specificity. Consequently, loss of 5-hmC may be useful for the diagnosis of OED with potential implications for therapy of OSCC.
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Furlan C, Polesel J, Barzan L, Franchin G, Sulfaro S, Romeo S, Colizzi F, Rizzo A, Baggio V, Giacomarra V, Dei Tos AP, Boscolo-Rizzo P, Vaccher E, Dolcetti R, Sigalotti L, Fratta E. Prognostic significance of LINE-1 hypomethylation in oropharyngeal squamous cell carcinoma. Clin Epigenetics 2017; 9:58. [PMID: 28572862 PMCID: PMC5450111 DOI: 10.1186/s13148-017-0357-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 05/18/2017] [Indexed: 01/13/2023] Open
Abstract
Background Inclusion of new biomarkers to improve a personalized treatment approach for oropharyngeal squamous cell carcinoma (OPSCC) is urgently needed. Hypomethylation of the Long interspersed nucleotide element-1 (LINE-1) repetitive elements, a widely accepted surrogate of overall genomic DNA methylation content, was found to be associated with a poor prognosis in several cancers. At present, no studies have investigated the influence of LINE-1 methylation levels on OPSCC relapse. The main goal of this study was the evaluation of the prognostic value of LINE-1 methylation status in predicting early tumor relapse in locally advanced OPSCC. Methods We retrospectively reviewed a cohort of 77 patients with stage III–IVB OPSCC. Methylation of LINE-1 repetitive sequences was evaluated by real-time quantitative methylation-specific PCR in formalin-fixed paraffin-embedded tissues. The prognostic relevance of LINE-1 methylation was assessed by comparing patients who relapsed within 2 years from the end of treatment (cases) with those who did not (controls). Results were validated in an independent cohort of 33 patients with OPSCC. Results With respect to early OPSCC relapse, the mean LINE-1 methylation level was significantly lower in relapsed cases than in control group (p < 0.01). Interestingly, LINE-1 methylation was lower in relapsed cases than in controls in both HPV16-negative and HPV16-positive OPSCC patients, even if statistical significance was reached only for the former group (p = 0.01). LINE-1 methylation levels were also significantly reduced in relapsed cases with respect to the controls in OPSCC current smokers (p = 0.02). Consistently, in HPV16-negative current smokers, OPSCC relapse was significantly associated with decreased levels of LINE-1 methylation (p = 0.02). Using logistic regression model, we found that patients with hypomethylated LINE-1 were associated with a 3.5 higher risk of early relapse than hypermethylated ones (OR = 3.51; 95% CI 1.03–12.00). Adjustment for potential confounders did not substantially change the risk magnitude. Results from the validation cohort confirmed the lower LINE-1 methylation in patients who early relapsed compared to relapse-free patients. Conclusions LINE-1 hypomethylation is associated with higher risk of early relapse in stage III–IVB OPSCC. Further validation in a prospective study is needed for its application in daily clinical practice.
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Affiliation(s)
- Carlo Furlan
- Division of Radiotherapy, Centro di Riferimento Oncologico, IRCCS-National Cancer Institute, Aviano, PN Italy
| | - Jerry Polesel
- Unit of Cancer Epidemiology, Centro di Riferimento Oncologico, IRCCS-National Cancer Institute, Aviano, PN Italy
| | - Luigi Barzan
- Department of Surgery, Centro di Riferimento Oncologico, IRCCS-National Cancer Institute, Aviano, PN Italy
| | - Giovanni Franchin
- Division of Radiotherapy, Centro di Riferimento Oncologico, IRCCS-National Cancer Institute, Aviano, PN Italy
| | - Sandro Sulfaro
- Division of Pathology, General Hospital "S. Maria degli Angeli", Pordenone, Italy
| | - Salvatore Romeo
- Department of Pathology, San Donà di Piave Hospital, San Donà di Piave, Italy
| | - Francesca Colizzi
- Immunopathology and Cancer Biomarkers, Centro di Riferimento Oncologico, IRCCS-National Cancer Institute, Aviano, PN Italy
| | - Aurora Rizzo
- Immunopathology and Cancer Biomarkers, Centro di Riferimento Oncologico, IRCCS-National Cancer Institute, Aviano, PN Italy
| | - Vittorio Baggio
- Department of Radiation Oncology, Treviso Regional Hospital, Treviso, Italy
| | - Vittorio Giacomarra
- Unit of Otolaryngology, General Hospital "S. Maria degli Angeli", Pordenone, Italy
| | | | - Paolo Boscolo-Rizzo
- Department of Neurosciences, ENT Clinic and Regional Center for Head and Neck Cancer, Treviso Regional Hospital, University of Padua, Treviso, Italy
| | - Emanuela Vaccher
- Division of Medical Oncology A, Centro di Riferimento Oncologico, IRCCS-National Cancer Institute, Aviano, PN Italy
| | - Riccardo Dolcetti
- Immunopathology and Cancer Biomarkers, Centro di Riferimento Oncologico, IRCCS-National Cancer Institute, Aviano, PN Italy.,Translational Research Institute, The University of Queensland Diamantina Institute, Brisbane, Australia
| | - Luca Sigalotti
- Immunopathology and Cancer Biomarkers, Centro di Riferimento Oncologico, IRCCS-National Cancer Institute, Aviano, PN Italy.,Institute of Clinical Pathology, University Hospital of Udine, Udine, Italy
| | - Elisabetta Fratta
- Immunopathology and Cancer Biomarkers, Centro di Riferimento Oncologico, IRCCS-National Cancer Institute, Aviano, PN Italy
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Villa A, Woo SB. Leukoplakia—A Diagnostic and Management Algorithm. J Oral Maxillofac Surg 2017; 75:723-734. [DOI: 10.1016/j.joms.2016.10.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 10/18/2016] [Accepted: 10/18/2016] [Indexed: 02/07/2023]
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Jayaprakash C, Varghese VK, Bellampalli R, Radhakrishnan R, Ray S, Kabekkodu SP, Satyamoorthy K. Hypermethylation of Death-Associated Protein Kinase (DAPK1) and its association with oral carcinogenesis - An experimental and meta-analysis study. Arch Oral Biol 2017; 80:117-129. [PMID: 28412611 DOI: 10.1016/j.archoralbio.2017.03.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Revised: 03/25/2017] [Accepted: 03/31/2017] [Indexed: 12/19/2022]
Abstract
OBJECTIVES The value of abnormal DNA methylation of DAPK1 promoter and its association with various cancers have been suggested in the literature. To establish the significance of DNA methylation of DAPK1 promoter in oral squamous cell carcinoma (OSCC), we a) performed a case-control study, b) evaluated published data for its utility in the diagnosis and prognosis of OSCC and c) identified the association of DAPK1 gene expression with promoter DNA methylation status. DESIGN Bisulfite gene sequencing of DAPK1 promoter region was performed on non-malignant and malignant oral samples. Further, using a systematic search, 330 publications were retrieved from PubMed, Scopus, and Google Scholar and 11 relevant articles were identified. RESULTS Significant association of DAPK1 promoter methylation with OSCC (p<0.0001) was observed in the case-control study. The studies chosen for meta-analysis showed prognostic and predictive significance of DAPK1 gene promoter, despite defined inconsistencies in few studies. Overall, we obtained a statistically significant (p-value<0.001) association for both sensitivity and specificity of DAPK1 DNA promoter methylation in oral cancer cases, without publication bias. CONCLUSION DNA hypermethylation of DAPK1 gene promoter is a promising biomarker for OSCC prediction/prognostics and suggests further validation in large distinct cohorts to facilitate translation to clinics.
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Affiliation(s)
- Chinchu Jayaprakash
- Department of Cell and Molecular Biology, School of Life Sciences, Manipal University, Manipal, 576104, India.
| | - Vinay Koshy Varghese
- Department of Cell and Molecular Biology, School of Life Sciences, Manipal University, Manipal, 576104, India.
| | - Ravishankara Bellampalli
- Department of Cell and Molecular Biology, School of Life Sciences, Manipal University, Manipal, 576104, India.
| | - Raghu Radhakrishnan
- Department of Oral Pathology, Manipal College of Dental Sciences, Manipal University, Manipal, 576104, India.
| | - Satadru Ray
- Department of Surgical Oncology, Kasturba Medical College, Manipal University, Manipal, 576104, India.
| | - Shama Prasada Kabekkodu
- Department of Cell and Molecular Biology, School of Life Sciences, Manipal University, Manipal, 576104, India.
| | - Kapaettu Satyamoorthy
- Department of Cell and Molecular Biology, School of Life Sciences, Manipal University, Manipal, 576104, India.
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Cai F, Xiao X, Niu X, Zhong Y. Association between promoter methylation of DAPK gene and HNSCC: A meta-analysis. PLoS One 2017; 12:e0173194. [PMID: 28249042 PMCID: PMC5332095 DOI: 10.1371/journal.pone.0173194] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 02/16/2017] [Indexed: 01/05/2023] Open
Abstract
Background The death-associated protein kinase (DAPK) is a tumor suppressor gene, which is a mediator of cell death of INF-γ–induced apoptosis. Aberrant methylation of DAPK promoter has been reported in patients with head and neck squamous cell carcinoma (HNSCC). However, the results of these studies are inconsistent. Hence, the present study aimed to evaluate the association between the promoter methylation of DAPK gene and HNSCC. Methods Relevant studies were systematically searched in PubMed, Web of Science, Ovid, and Embase. The association between DAPK promoter methylation and HNSCC was assessed by odds ratio (ORs) and 95% confidence intervals (CI). To evaluate the potential sources of heterogeneity, we conducted the meta-regression analysis and subgroup analysis. Results Eighteen studies were finally included in the meta-analysis. The frequency of DAPK promoter methylation in patients with HNSCC was 4.09-fold higher than the non-cancerous controls (OR = 3.96, 95%CI = 2.26–6.95). A significant association between DAPK promoter methylation and HNSCC was found among the Asian region and the Non-Asia region (Asian region, OR = 4.43, 95% CI = 2.29–8.58; Non-Asia region, OR = 3.39, 95% CI = 1.18–9.78). In the control source, the significant association between DAPK promoter methylation and HNSCC was seen among the autologous group and the heterogeneous group (autologous group, OR = 2.71, 95% CI = 1.49–4.93; heterogeneous group, OR = 9.50, 95% CI = 2.98–30.27). DAPK promoter methylation was significantly correlated with alcohol status (OR = 1.85, 95% CI = 1.07–3.21). Conclusion The results of this meta-analysis suggested that aberrant methylation of DAPK promoter was associated with HNSCC.
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Affiliation(s)
- Fucheng Cai
- Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiyue Xiao
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xun Niu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yi Zhong
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- * E-mail:
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Ampofo E, Schmitt BM, Menger MD, Laschke MW. The regulatory mechanisms of NG2/CSPG4 expression. Cell Mol Biol Lett 2017; 22:4. [PMID: 28536635 PMCID: PMC5415841 DOI: 10.1186/s11658-017-0035-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 02/22/2017] [Indexed: 12/24/2022] Open
Abstract
Neuron-glial antigen 2 (NG2), also known as chondroitin sulphate proteoglycan 4 (CSPG4), is a surface type I transmembrane core proteoglycan that is crucially involved in cell survival, migration and angiogenesis. NG2 is frequently used as a marker for the identification and characterization of certain cell types, but little is known about the mechanisms regulating its expression. In this review, we provide evidence that the regulation of NG2 expression underlies inflammation and hypoxia and is mediated by methyltransferases, transcription factors, including Sp1, paired box (Pax) 3 and Egr-1, and the microRNA miR129-2. These regulatory factors crucially determine NG2-mediated cellular processes such as glial scar formation in the central nervous system (CNS) or tumor growth and metastasis. Therefore, they are potential targets for the establishment of novel NG2-based therapeutic strategies in the treatment of CNS injuries, cancer and other conditions of these types.
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Affiliation(s)
- Emmanuel Ampofo
- Institute for Clinical & Experimental Surgery, Saarland University, 66421 Homburg, Germany
| | - Beate M Schmitt
- Institute for Clinical & Experimental Surgery, Saarland University, 66421 Homburg, Germany
| | - Michael D Menger
- Institute for Clinical & Experimental Surgery, Saarland University, 66421 Homburg, Germany
| | - Matthias W Laschke
- Institute for Clinical & Experimental Surgery, Saarland University, 66421 Homburg, Germany
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Basu B, Chakraborty J, Chandra A, Katarkar A, Baldevbhai JRK, Dhar Chowdhury D, Ray JG, Chaudhuri K, Chatterjee R. Genome-wide DNA methylation profile identified a unique set of differentially methylated immune genes in oral squamous cell carcinoma patients in India. Clin Epigenetics 2017; 9:13. [PMID: 28174608 PMCID: PMC5292006 DOI: 10.1186/s13148-017-0314-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 01/19/2017] [Indexed: 01/06/2023] Open
Abstract
Background Oral squamous cell carcinoma (OSCC) is one of the common malignancies in Southeast Asia. Epigenetic changes, mainly the altered DNA methylation, have been implicated in many cancers. Considering the varied environmental and genotoxic exposures among the Indian population, we conducted a genome-wide DNA methylation study on paired tumor and adjacent normal tissues of ten well-differentiated OSCC patients and validated in an additional 53 well-differentiated OSCC and adjacent normal samples. Results Genome-wide DNA methylation analysis identified several novel differentially methylated regions associated with OSCC. Hypermethylation is primarily enriched in the CpG-rich regions, while hypomethylation is mainly in the open sea. Distinct epigenetic drifts for hypo- and hypermethylation across CpG islands suggested independent mechanisms of hypo- and hypermethylation in OSCC development. Aberrant DNA methylation in the promoter regions are concomitant with gene expression. Hypomethylation of immune genes reflect the lymphocyte infiltration into the tumor microenvironment. Comparison of methylome data with 312 TCGA HNSCC samples identified a unique set of hypomethylated promoters among the OSCC patients in India. Pathway analysis of unique hypomethylated promoters indicated that the OSCC patients in India induce an anti-tumor T cell response, with mobilization of T lymphocytes in the neoplastic environment. Survival analysis of these epigenetically regulated immune genes suggested their prominent role in OSCC progression. Conclusions Our study identified a unique set of hypomethylated regions, enriched in the promoters of immune response genes, and indicated the presence of a strong immune component in the tumor microenvironment. These methylation changes may serve as potential molecular markers to define risk and to monitor the prognosis of OSCC patients in India. Electronic supplementary material The online version of this article (doi:10.1186/s13148-017-0314-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Baidehi Basu
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata, 700108 India
| | - Joyeeta Chakraborty
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata, 700108 India
| | - Aditi Chandra
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata, 700108 India
| | - Atul Katarkar
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata, 700108 India.,Molecular Genetics Division, CSIR-Indian Institute of Chemical biology, 4 Raja S C Mullick Road, Kolkata, 700 032 India
| | | | | | - Jay Gopal Ray
- Dr. R Ahmed Dental College & Hospital, 114, A J C Bose Road, Kolkata, India
| | - Keya Chaudhuri
- Molecular Genetics Division, CSIR-Indian Institute of Chemical biology, 4 Raja S C Mullick Road, Kolkata, 700 032 India
| | - Raghunath Chatterjee
- Human Genetics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata, 700108 India
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Abstract
Oral squamous cell carcinoma (OSCC) is the most common type of oral neoplasm, accounting for over 90% of all oral malignancies and 38% of head and neck tumors. Worldwide, OSCC is the eighth most common human cancer, with more than 500,000 new cases being diagnosed every year with a fairly onerous prognosis, encouraging further research on factors that might modify disease outcome. Genetic and/or environmental risk factors associated with the development of oral cancer have been sufficiently understood (smoking, alcohol, betel, diet, living habits, etc.). Knowledge of the genetic basis in oral carcinogenesis is still a challenging task. To improve the diagnosis and prevention, a previously unknown type of chromatin modification, known as epigenetic, which is defined as heritable DNA changes that are not encoded in the sequence itself and which are reversible and increasingly appear to serve fundamental roles in cell differentiation and development are studied. Tumors shed their DNA into the blood and epigenetic changes that occur early during tumorigenesis, sometimes even in premalignant lesions, can provide valuable biomarkers. Key components involved in epigenetic regulation are DNA methylation, histone modifications and modifications in micro ribonucleic acids (miRNAs). Epigenetic modifications may contribute to aberrant epigenetic mechanisms seen in oral precancers and cancers. In the near future, epigenetic variations found in oral dysplastic cells can act as a molecular fingerprint for malignancies.
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Affiliation(s)
- K N Hema
- Department of Oral and Maxillofacial Pathology, V.S. Dental College and Hospital, Bengaluru, Karnataka, India
| | - T Smitha
- Department of Oral and Maxillofacial Pathology, V.S. Dental College and Hospital, Bengaluru, Karnataka, India
| | - H S Sheethal
- Department of Oral and Maxillofacial Pathology, V.S. Dental College and Hospital, Bengaluru, Karnataka, India
| | - S Angeline Mirnalini
- Department of Oral and Maxillofacial Pathology, V.S. Dental College and Hospital, Bengaluru, Karnataka, India
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Cai F, Xiao X, Niu X, Shi H, Zhong Y. Aberrant Methylation of MGMT Promoter in HNSCC: A Meta-Analysis. PLoS One 2016; 11:e0163534. [PMID: 27657735 PMCID: PMC5033341 DOI: 10.1371/journal.pone.0163534] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Accepted: 09/09/2016] [Indexed: 01/20/2023] Open
Abstract
Background O6-methylguanine-DNA methyl-transferase (MGMT) gene, a DNA repair gene, plays a critical role in the repair of alkylated DNA adducts that form following exposure to genotoxic agents. MGMT is generally expressed in various tumors, and its function is frequently lost because of hypermethylation in the promoter. The promoter methylation of MGMT has been extensively investigated in head and neck squamous cell carcinoma (HNSCC). However, the association between the promoter methylation of MGMT and HNSCC risk remains inconclusive and inconsistent. Therefore, we performed a meta-analysis to better clarify the association between the promoter methylation of MGMT and HNSCC risk. Methods A systematical search was conducted in PubMed, Web of Science, EMBASE, and Ovid for studies on the association between MGMT promoter methylation and HNSCC. Odds ratio (ORs) and 95% confidence intervals (CI) were calculated to estimate association between MGMT promoter methylation and risk of HNSCC. The meta-regression and subgroup analysis were undertaken to explore the potential sources of heterogeneity. Results Twenty studies with 1,030 cases and 775 controls were finally included in this study. The frequency of MGMT promoter methylation was 46.70% in HNSCC group and 23.23% in the control group. The frequency of MGMT promoter methylation in HNSCC group was significantly higher than the control group (OR = 2.83, 95%CI = 2.25–3.56). Conclusion This meta-analysis indicates that aberrant methylation of MGMT promoter was significantly associated with the risk of HNSCC, and it may be a potential molecular marker for monitoring the disease and may provide new insights to the treatment of HNSCC.
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Affiliation(s)
- Fucheng Cai
- Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiyue Xiao
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xun Niu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hao Shi
- Department of Epidemiology and Biostatistics, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yi Zhong
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- * E-mail:
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Kaliyaperumal S, Sankarapandian S. Evaluation of p16 hypermethylation in oral submucous fibrosis: A quantitative and comparative analysis in buccal cells and saliva using real-time methylation-specific polymerase chain reaction. South Asian J Cancer 2016; 5:73-9. [PMID: 27275454 PMCID: PMC4873703 DOI: 10.4103/2278-330x.181645] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Aims: The aim of this study was to quantitatively investigate the hypermethylation of p16 gene in buccal cells and saliva of oral submucous fibrosis (OSMF) patients using real-time quantitative methylation-specific polymerase chain reaction (PCR) and to compare the values of two methods. Subjects and Methods: A total of 120 samples were taken from 60 subjects selected for this study, of which 30 were controls and 30 patients were clinically and histopathologically diagnosed with OSMF. In both groups, two sets of samples were collected, one directly from the buccal cells through cytobrush technique and the other through salivary rinse. We analyzed the samples for the presence of p16 hypermethylation using quantitative real-time PCR. Results: In OSMF, the hypermethylation status of p16 in buccal cells was very high (93.3%) and in salivary samples, it was partially methylated (50%). However, no hypermethylation was found in controls suggesting that significant quantity of p16 hypermethylation was present in buccal cells and saliva in OSMF. Conclusions: This study indicates that buccal cell sampling may be a better method for evaluation than the salivary samples. It signifies that hypermethylation of p16 is an important factor to be considered in epigenetic alterations of normal cells to oral precancer, i.e. OSMF.
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Affiliation(s)
- Subadra Kaliyaperumal
- Department of Oral Medicine and Radiology, Faculty of Dental Sciences, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India
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Ma K, Cao B, Guo M. The detective, prognostic, and predictive value of DNA methylation in human esophageal squamous cell carcinoma. Clin Epigenetics 2016; 8:43. [PMID: 27110300 PMCID: PMC4840959 DOI: 10.1186/s13148-016-0210-9] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 04/14/2016] [Indexed: 12/17/2022] Open
Abstract
Esophageal cancer is one of the most common malignancies in the world. Squamous cell carcinoma accounts for approximately 90 % of esophageal cancer cases. Genetic and epigenetic changes have been found to accumulate during the development of various cancers, including esophageal squamous carcinoma (ESCC). Tobacco smoking and alcohol consumption are two major risk factors for ESCC, and both tobacco and alcohol were found to induce methylation changes in ESCC. Growing evidence demonstrates that aberrant epigenetic changes play important roles in the multiple-step processes of carcinogenesis and tumor progression. DNA methylation may occur in the key components of cancer-related signaling pathways. Aberrant DNA methylation affects genes involved in cell cycle, DNA damage repair, Wnt, TGF-β, and NF-κB signaling pathways, including P16, MGMT, SFRP2, DACH1, and ZNF382. Certain genes methylated in precursor lesions of the esophagus demonstrate that DNA methylation may serve as esophageal cancer early detection marker, such as methylation of HIN1, TFPI-2, DACH1, and SOX17. CHFR methylation is a late stage event in ESCC and is a sensitive marker for taxanes in human ESCC. FHIT methylation is associated with poor prognosis in ESCC. Aberrant DNA methylation changes may serve as diagnostic, prognostic, and chemo-sensitive markers. Characterization of the DNA methylome in ESCC will help to better understand its mechanisms and develop improved therapies.
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Affiliation(s)
- Kai Ma
- />Department of Thoracic Surgery, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Baoping Cao
- />Department of Gastroenterology and Hepatology, Chinese PLA General Hospital, #28 Fuxing Road, Beijing, 100853 China
| | - Mingzhou Guo
- />Department of Gastroenterology and Hepatology, Chinese PLA General Hospital, #28 Fuxing Road, Beijing, 100853 China
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Onerci Celebi O, Tezel GG, Hosal AS, Cengiz M, Gullu IH, Hayran M. Detection of O6-methylguanine-DNA methyltransferase gene promoter region methylation pattern using pyrosequencing and the effect of methylation pattern on survival, recurrence, and chemotherapy sensitivity in patients with laryngeal cancer. Pathol Res Pract 2016; 212:456-62. [PMID: 27067808 DOI: 10.1016/j.prp.2016.02.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 02/09/2016] [Accepted: 02/24/2016] [Indexed: 10/22/2022]
Abstract
AIM To determine the methylation pattern of the promoter region of the O6-methylguanine-DNA methyltransferase (MGMT) gene in laryngeal cancer and normal laryngeal mucosa samples using pyrosequencing, and to determine the relationship between the methylation pattern of MGMT, and tumor stage, survival, recurrence, and chemosensitivity in patients with laryngeal cancer. MATERIALS AND METHODS Laryngeal cancer and normal laryngeal mucosa specimens were obtained from our paraffin block archives, and then subjected to pyrosequencing. Different cut-off values were used to detect methylation. Clinicopathological data for the patients that provided specimens were obtained from archive records. RESULTS When 5% was used as the cut-off value, 78% of the laryngeal cancer specimens (64 of 82), and 27.3% of normal laryngeal mucosa specimens (3 of 11) were considered methylated. When 10% was used as the cut-off value, 47% of the laryngeal cancer specimens (39 of 82), and none of the normal laryngeal mucosa specimens were considered methylated. There was not a significant relationship between the methylation status of MGMT, and clinicopathological parameters, including age, tumor stage, histopathological differentiation, chemoradiotherapy protocol used, recurrence, or disease-free survival. CONCLUSION Pyrosequencing is a reliable semiquantitative technique that can be used to detect the methylation pattern. Methylation was common in the laryngeal cancer specimens, but there was not a significant relationship between the methylation status of MGMT and clinicopathological parameters.
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Affiliation(s)
- Ozlem Onerci Celebi
- Department of Otorhinolaryngology, Hacettepe University, Sihhiye 06100, Ankara, Turkey.
| | - Gaye Guler Tezel
- Department of Pathology, Hacettepe University, Sihhiye 06100, Ankara, Turkey
| | - Ali Sefik Hosal
- Department of Otorhinolaryngology, Hacettepe University, Sihhiye 06100, Ankara, Turkey
| | - Mustafa Cengiz
- Department of Radiation Oncology, Hacettepe University, Sihhiye 06100, Ankara, Turkey
| | - Ibrahim Halil Gullu
- Department of Medical Oncology, Hacettepe University, Sihhiye 06100, Ankara, Turkey
| | - Mutlu Hayran
- Department of Preventive Oncology, Hacettepe University Cancer Institute, Sihhiye 06100, Ankara, Turkey
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Shridhar K, Walia GK, Aggarwal A, Gulati S, Geetha AV, Prabhakaran D, Dhillon PK, Rajaraman P. DNA methylation markers for oral pre-cancer progression: A critical review. Oral Oncol 2015; 53:1-9. [PMID: 26690652 PMCID: PMC4788701 DOI: 10.1016/j.oraloncology.2015.11.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 11/10/2015] [Accepted: 11/14/2015] [Indexed: 02/07/2023]
Abstract
Although oral cancers are generally preceded by a well-established pre-cancerous stage, there is a lack of well-defined clinical and morphological criteria to detect and signal progression from pre-cancer to malignant tumours. We conducted a critical review to summarize the evidence regarding aberrant DNA methylation patterns as a potential diagnostic biomarker predicting progression. We identified all relevant human studies published in English prior to 30th April 2015 that examined DNA methylation (%) in oral pre-cancer by searching PubMed, Web-of-Science and Embase databases using combined key-searches. Twenty-one studies (18-cross-sectional; 3-longitudinal) were eligible for inclusion in the review, with sample sizes ranging from 4 to 156 affected cases. Eligible studies examined promoter region hyper-methylation of tumour suppressor genes in pathways including cell-cycle-control (n=15), DNA-repair (n=7), cell-cycle-signalling (n=4) and apoptosis (n=3). Hyper-methylated loci reported in three or more studies included p16, p14, MGMT and DAPK. Two longitudinal studies reported greater p16 hyper-methylation in pre-cancerous lesions transformed to malignancy compared to lesions that regressed (57-63.6% versus 8-32.1%; p<0.01). The one study that explored epigenome-wide methylation patterns reported three novel hyper-methylated loci (TRHDE; ZNF454; KCNAB3). The majority of reviewed studies were small, cross-sectional studies with poorly defined control groups and lacking validation. Whilst limitations in sample size and study design preclude definitive conclusions, current evidence suggests a potential utility of DNA methylation patterns as a diagnostic biomarker for oral pre-cancer progression. Robust studies such as large epigenome-wide methylation explorations of oral pre-cancer with longitudinal tracking are needed to validate the currently reported signals and identify new risk-loci and the biological pathways of disease progression.
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Affiliation(s)
- Krithiga Shridhar
- Centre for Chronic Conditions and Injuries, Public Health Foundation of India, Gurgaon, Haryana, India.
| | - Gagandeep Kaur Walia
- Centre for Chronic Conditions and Injuries, Public Health Foundation of India, Gurgaon, Haryana, India
| | - Aastha Aggarwal
- Centre for Chronic Conditions and Injuries, Public Health Foundation of India, Gurgaon, Haryana, India
| | - Smriti Gulati
- Centre for Chronic Conditions and Injuries, Public Health Foundation of India, Gurgaon, Haryana, India
| | - A V Geetha
- Centre for Chronic Conditions and Injuries, Public Health Foundation of India, Gurgaon, Haryana, India
| | - Dorairaj Prabhakaran
- Centre for Chronic Conditions and Injuries, Public Health Foundation of India, Gurgaon, Haryana, India; Centre for Chronic Disease Control, Gurgaon, Haryana, India; London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Preet K Dhillon
- Centre for Chronic Conditions and Injuries, Public Health Foundation of India, Gurgaon, Haryana, India
| | - Preetha Rajaraman
- Center for Global Health, National Cancer Institute, NIH, DHHS, Bethesda, Maryland, USA
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D'Souza W, Saranath D. Clinical implications of epigenetic regulation in oral cancer. Oral Oncol 2015; 51:1061-8. [PMID: 26421863 DOI: 10.1016/j.oraloncology.2015.09.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 09/02/2015] [Accepted: 09/08/2015] [Indexed: 01/05/2023]
Abstract
Oral cancer is a high incidence cancer which is of major public health concern in India being the most common cancer in males and fifth most common cancer in females in India, contributing to 26% of the global oral cancer burden. The major risk factors of oral cancer are tobacco, alcohol and high risk Human Papilloma Virus type 16/18. However, only 3-12% of the high risk individuals with dysplasia develop oral cancer. Thus, individual genomic variants representing the genomic constitution and epigenetic alterations play a critical role in the development of oral cancer. Extensive epigenetic studies on the molecular lesions including oncogenes, tumor suppressor genes, genes associated with apoptosis, DNA damage repair have been reported. The current review highlights epigenetic regulation with a focus on molecular biomarkers and epidrug therapy in oral cancer. Epigenetic regulation by hypermethylation, histone modifications and specific microRNAs are often associated with early events and advanced stages in oral cancer, and thus indicate epidrug therapy for intervention. The presence of epigenetic marks in oral lesions, cancers and tumor associated mucosa emphasizes indications as biomarkers and epidrugs with therapeutic potential for better patient management.
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Affiliation(s)
- Wendy D'Souza
- Department of Biological Sciences, Sunandan Divatia School of Science, SVKM's NMIMS (Deemed-to-be) University, Mumbai 400056, India
| | - Dhananjaya Saranath
- Department of Biological Sciences, Sunandan Divatia School of Science, SVKM's NMIMS (Deemed-to-be) University, Mumbai 400056, India.
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Abstract
Oral squamous cell carcinoma (OSCC) is a multistep process which is modulated by several endogenous and environmental factors. Epigenetic changes have been found to be equally responsible for OSCC as genetic changes. A plethora of genes showing hypermethylation have been discovered in OSCC. Since these changes are reversible, a lot of emphasis is on using the natural compounds for their ability to cause demethylation which could lead to reactivation of the inactivated tumor suppressor genes. This review encompasses the promoter hypermethylation of tumor suppressor genes in OSCC and its possible reversal using natural compounds. In addition, new compounds which could be screened for their demethylating ability have also been proposed.
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Association between P16INK4a promoter methylation and HNSCC: a meta-analysis of 21 published studies. PLoS One 2015; 10:e0122302. [PMID: 25835498 PMCID: PMC4383544 DOI: 10.1371/journal.pone.0122302] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 02/19/2015] [Indexed: 01/10/2023] Open
Abstract
Background The p16INK4a is an important tumor suppressor gene (TSG) and aberrant methylation of promoter is known to be a major inactivation mechanism of the tumor suppressor and tumor-related genes. Aberrant TSG methylation was considered an important epigenetic silencing mechanism in the progression of head and neck squamous cell carcinoma (HNSCC). However, some studies have reported differences in the methylation frequencies of P16INK4a promoter between cancer and the corresponding control group. Therefore, we conducted a meta-analysis to better identify the association. Methods PubMed, Ovid, ISI Web of Science, and EMBASE were searched to identify eligible studies to evaluate the association of p16INK4a promoter methylation and HNSCC. Odds ratio (ORs) and 95% confidence intervals (95%CI) were calculated to evaluate the strength of association between p16INK4a promoter methylation and HNSCC. Results A total of twenty-one studies with 1155 cases and 1017 controls were included in the meta-analysis. The frequencies of p16INK4a promoter methylation in the cancer group were significantly higher than those in the control group (cancer group: median: 46.67%, range = 7.84%-95.12%; control group: median: 18.37%, range = 0–83.33%; respectively). The pooled odds ratio was 3.37 (95%CI = 2.32–4.90) in the cancer group versus the corresponding control group under the random-effects model. Conclusion This meta-analysis of 21 published studies identified that aberrant methylation of p16INK4a promoter was found to be significantly associated with HNSCC.
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Ma HL, Yu C, Liu Y, Tan YR, Qiao JK, Yang X, Wang LZ, Li J, Chen Q, Chen FX, Zhang ZY, Zhong LP. Decreased expression of glutathione S-transferase pi correlates with poorly differentiated grade in patients with oral squamous cell carcinoma. J Oral Pathol Med 2014; 44:193-200. [PMID: 25047743 DOI: 10.1111/jop.12229] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2014] [Indexed: 12/20/2022]
Affiliation(s)
- Hai-long Ma
- Department of Oral & Maxillofacial-Head & Neck Oncology; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Cong Yu
- Department of Oral & Maxillofacial-Head & Neck Oncology; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Ying Liu
- Department of Oral & Maxillofacial-Head & Neck Oncology; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Yi-ran Tan
- Department of Oral & Maxillofacial-Head & Neck Oncology; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Jin-ke Qiao
- Department of Oral & Maxillofacial-Head & Neck Oncology; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Xi Yang
- Department of Oral & Maxillofacial-Head & Neck Oncology; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Li-zhen Wang
- Department of Oral Pathology; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Jiang Li
- Department of Oral Pathology; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Qiong Chen
- Department of Clinical Laboratories; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Fu-xiang Chen
- Department of Clinical Laboratories; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Zhi-yuan Zhang
- Department of Oral & Maxillofacial-Head & Neck Oncology; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Lai-ping Zhong
- Department of Oral & Maxillofacial-Head & Neck Oncology; Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
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Promoter region hypermethylation and mRNA expression of MGMT and p16 genes in tissue and blood samples of human premalignant oral lesions and oral squamous cell carcinoma. BIOMED RESEARCH INTERNATIONAL 2014; 2014:248419. [PMID: 24991542 PMCID: PMC4058681 DOI: 10.1155/2014/248419] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 04/23/2014] [Accepted: 05/13/2014] [Indexed: 01/09/2023]
Abstract
Promoter methylation and relative gene expression of O(6)-methyguanine-DNA-methyltransferase (MGMT) and p16 genes were examined in tissue and blood samples of patients with premalignant oral lesions (PMOLs) and oral squamous cell carcinoma (OSCC). Methylation-specific PCR and reverse transcriptase PCR were performed in 146 tissue and blood samples from controls and patients with PMOLs and OSCC. In PMOL group, significant promoter methylation of MGMT and p16 genes was observed in 59% (P = 0.0010) and 57% (P = 0.0016) of tissue samples, respectively, and 39% (P = 0.0135) and 33% (P = 0.0074) of blood samples, respectively. Promoter methylation of both genes was more frequent in patients with OSCC, that is, 76% (P = 0.0001) and 82% (P = 0.0001) in tissue and 57% (P = 0.0002) and 70% (P = 0.0001) in blood, respectively. Significant downregulation of MGMT and p16 mRNA expression was observed in both tissue and blood samples from patients with PMOLs and OSCC. Hypermethylation-induced transcriptional silencing of MGMT and p16 genes in both precancer and cancer suggests important role of these changes in progression of premalignant state to malignancy. Results support use of blood as potential surrogate to tissue samples for screening or diagnosing PMOLs and early OSCC.
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Kis A, Tatár TZ, Gáll T, Boda R, Tar I, Major T, Redl P, Gergely L, Szarka K. Frequency of genetic and epigenetic alterations of p14ARF and p16INK4A in head and neck cancer in a Hungarian population. Pathol Oncol Res 2014; 20:923-9. [PMID: 24710824 DOI: 10.1007/s12253-014-9775-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 03/27/2014] [Indexed: 11/29/2022]
Abstract
Occurrence of genetic and epigenetic alterations affecting p14ARF and p16INK4A were investigated in tumour samples of 37 oral (OSCC) and 28 laryngeal squamous cell cancer (LSCC) patients, and compared to exfoliated buccal epithelial cells of 68 healthy controls. Presence of deletions and mutations/polymorphisms affecting exons were examined using sequencing. Methylation status of promoters was assessed by methylation-specific PCR. Chi-square and Fisher's exact tests were used to compare frequency of events. Exon deletions were found in four controls, one OSCC and 22 LSCC patients; the latter significantly differed from controls (p < 0.001). Only two mutations (T24610A and C24702A) were in p16 exon 1 of two OSCC patients. Polymorphisms G28575A (Ala140Thr), G31292C (C540G) and G28608A were found in both patient groups. The p14 promoter was unmethylated in 86.7 % of OSCC and in 85.7 % of LSCC patients; for the p16 promoter these rates were 69.0 % and 76.2 % for OSCC and LSCC patients, respectively. Combining the two patient groups, unmethylated promoter was significantly less frequent in case of both p14 and p16 (p = 0.043 and p = 0.001, respectively) compared to the control group. In summary, exon deletion may be important in LSCC, while promoter methylation was relatively frequent in both patient groups.
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Affiliation(s)
- Andrea Kis
- Department of Medical Microbiology, Faculty of Medicine, University of Debrecen, H-4032, Debrecen, Nagyerdei krt. 98, Hungary
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Seethalakshmi C. Early Detection of Oral Squamous Cell Carcinoma (OSCC) - Role of Genetics: A Literature Review. J Clin Diagn Res 2013; 7:1824-6. [PMID: 24086928 DOI: 10.7860/jcdr/2013/5552.3281] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 03/28/2013] [Indexed: 11/24/2022]
Affiliation(s)
- C Seethalakshmi
- Senior Lecturer, (Oral Medicine and Radiology) Chettinad Dental College and Research Institute , Kelambakkam, Chennai, Tamil Nadu, India
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50
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Global analysis of DNA methylation changes during progression of oral cancer. Oral Oncol 2013; 49:1033-42. [PMID: 24035722 DOI: 10.1016/j.oraloncology.2013.08.005] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 08/15/2013] [Accepted: 08/17/2013] [Indexed: 01/14/2023]
Abstract
OBJECTIVES Earlier studies involving a priori gene selection have identified promoter regions deregulated by DNA methylation changes in oral squamous cell cancers (OSCCs) and precancers. Interrogation of global DNA methylation patterns for such specimens has not been reported, though such analyses are needed to uncover novel molecular factors driving disease. MATERIALS AND METHODS We evaluated global DNA methylation patterns for 30 biopsies obtained from 10 patients undergoing surgical removal of an OSCC or carcinoma in situ (CIS). From a disease field in each patient, we collected (i) dysplastic, (ii) CIS or OSCC, and (iii) adjacent normal biopsies. DNA isolated from each biopsy was profiled for methylation status using the Illumina HumanMethylation27K platform. RESULTS Our data demonstrate that aberrant methylation of promoter CpG islands exists across oral precancer and OSCC genomes. Non-hierarchical clustering of all methylation data revealed distinct methylation patterns between the normal and the CIS/OSCC tissues (with results for dysplastic biopsies split between groups). Multiple genes exhibiting recurrent aberrant DNA methylation were found for both dysplastic and CIS/OSCC groups, and included enrichment for genes found in the WNT and MAPK signaling pathways. CONCLUSION In identifying aberrant DNA methylation at the earliest stages of oral precancer and finding recurring epigenetic disruption of specific genes/pathways across our analyzed cohort, we see evidence that CpG methylation changes may play a role in oral cancer progression and that global DNA methylation analyses may have significant utility in wider studies that seek to derive biomarkers or potentially druggable targets to improve oral cancer outcomes.
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