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Khalil W, Alaa El Din F, Jaffal M, Kanj AEH, Nabbouh A, Kurban M, Rahal EA, Matar GM. Prevalence of Human Papillomavirus (HPV)-16 in Different Dental Infections in the Lebanese Population. Cureus 2023; 15:e38809. [PMID: 37303381 PMCID: PMC10251111 DOI: 10.7759/cureus.38809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/09/2023] [Indexed: 06/13/2023] Open
Abstract
BACKGROUND Dental infections, which are the main cause of tooth loss, are known to be caused by bacteria. However, recent research suggests that other organisms, such as viruses, may also play a role. In this study, we aim to detect the presence of human papillomavirus (HPV)-16 and assess its prevalence in tissues infected with various dental infections, including aggressive and chronic periodontitis, pericoronitis, and periapical infection, as well as healthy gingival tissues, saliva, and gingival crevicular fluid, for comparison. METHODS A cross-sectional study including 124 adult healthy patients presenting with dental infections requiring dental extractions were conducted to assess the prevalence of HPV-16 in saliva, infected, and healthy tissues using quantitative polymerase chain reaction (PCR) tests. Samples were collected and a categorical scale was used for the prevalence. Statistical analyses were performed using Chi-square for the prevalence of HPV-16. RESULTS Among the HPV-16-positive PCR cases, the prevalence of HPV-16 was highest in periapical infection tissues as compared to chronic periodontitis, aggressive periodontitis, pericoronitis, and control tissues. CONCLUSION The prevalence of HPV-16 in periapical infection samples was the highest among the studied dental infection samples. Thus, a primary conclusion can be drawn about the presence of an association between HPV-16 and the occurrence of periapical infection.
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Affiliation(s)
- Wael Khalil
- Oral and Maxillofacial Surgery Department, Lebanese University, Beirut, LBN
| | - Ferdos Alaa El Din
- Department of Microbiology, College of Dentistry, Al-Ayen University, Thi-Qar, IRQ
| | - Marwa Jaffal
- Restorative and Esthetic Dentistry, Saint Joseph University, Beirut, LBN
| | - Abd El Hadi Kanj
- Department of Orthodontics, College of Dentistry, Al-Ayen University, Thi-Qar, IRQ
| | - Ali Nabbouh
- Office of Graduate Studies in Biomedical Sciences, American University of Beirut, Beirut, LBN
| | - Mazen Kurban
- Dermatopathology, American University of Beirut Medical Center, Beirut, LBN
| | - Elias A Rahal
- Department of Experimental Pathology, Immunology, and Microbiology, American University of Beirut, Beirut, LBN
| | - Ghassan M Matar
- Department of Experimental Pathology, Immunology, and Microbiology, American University of Beirut, Beirut, LBN
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The Prevalence of High- and Low-Risk Types of HPV in Patients with Squamous Cell Carcinoma of the Head and Neck, Patients with Chronic Tonsillitis, and Healthy Individuals Living in Poland. Diagnostics (Basel) 2021; 11:diagnostics11122180. [PMID: 34943415 PMCID: PMC8699972 DOI: 10.3390/diagnostics11122180] [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: 09/21/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 12/05/2022] Open
Abstract
Human papillomavirus (HPV) is a virus with the potential to infect human epithelial cells and an etiological agent of many types of cancer, including head and neck cancer. The aim of the study was to determine the prevalence of HPV infection in patients with head and neck squamous cell carcinoma (HNSCC), patients with chronic tonsillitis, and healthy individuals, and to establish high- and low-risk HPV genotypes in these groups. The objectives also comprised the delineation of the relationship between the infection with high- or low-risk HPV subtypes and clinicopathological and demographic characteristics of the study groups. This study was composed of 76 patients diagnosed with HNSCC, 71 patients with chronic tonsillitis, and 168 cases without either of these conditions (the control group). HPV detection and identification of subtypes were performed on isolated DNA using a test which allowed detection of 33 common high-risk and low-risk HPV subtypes. The prevalence of HPV infection was 42.1%, 25.4%, and 37.5% in HNSCC, chronic tonsillitis, and control groups, respectively. HPV 16 was the most prevalent genotype in all groups and the non-oncogenic HPV 43/44 was frequent in HNSCC patients. This analysis provides insight into the prevalence of oral oncogenic and non-oncogenic HPVs in patients with head and neck cancer, patients with chronic tonsillitis and healthy individuals, and leads to the conclusion that further investigations are warranted to examine a larger cohort of patients focusing on high- and low-risk HPV genotypes. Efforts should be focused on screening and prevention strategies, and therefore, it is important to introduce tools for effective detection of HPV genotypes. Furthermore, given the role of vaccines against oral HPV infection, our observations lead to the suggestion that HPV vaccination should be of considerable importance in public health strategies.
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Divya B, Rao UD, Thavarajah R, Joshua E, Ranganathan K. HPV-16 Detection and Quantitation in Whole Mouth Fluid of Oral and Cervical Cancer Patients. JOURNAL OF OROFACIAL SCIENCES 2021. [DOI: 10.4103/jofs.jofs_38_21] [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] Open
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Ribeiro MGM, Marcolino LD, Ramos BRDA, Trento CL, Araujo KCGMD, Silva JRS, Jain S, Gurgel RQ, Silva MG, Dolabella SS. Elevated prevalence of high-risk HPV in healthy oral mucosa of users and nonusers of drugs in Northeastern Brazil. Braz Oral Res 2019; 33:e031. [PMID: 30994708 DOI: 10.1590/1807-3107bor-2019.vol33.0031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 03/14/2019] [Indexed: 01/20/2023] Open
Abstract
Variable rates of HPV infection have been reported in healthy oral mucosa worldwide. The main objective of this study was to detect and genotype HPV infection in users and nonusers of drugs with clinically healthy mucosa from the Northeast Brazil. Samples from 105 patients were amplified using the primers MY09/MY11 and GP5+/GP6+, and genotyping was performed by multiplex-PCR for HPV-6/11, 16 and 18. A total of 81.9% samples were positive. Among drug users, 84.5% presented the virus and 20.4% showed multiple infections. Among non-drug users, 78.7% were positive and 13.5% had multiple infections. Limited information is available on oral HPV in Brazilian population, especially for drug users, and our results showed higher HPV infection rates in both users and nonusers of drugs. More studies and researches focused on drug users including factors like sexual behavior, nutrition and cultural habits are necessary to enhance the comprehension of this relationship, and develop preventive strategies.
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Affiliation(s)
| | - Larissa Doddi Marcolino
- Universidade Estadual Paulista - Unesp, Botucatu Medical School, Department of Pathology, Botucatu, SP, Brazil
| | | | | | | | - José Rodrigo Santos Silva
- Universidade Federal de Sergipe - UFS, Department of Statistics and Actuarial Sciences, Aracaju, SE, Brazil
| | - Sona Jain
- Universidade Federal de Sergipe - UFS, Department of Morphology, Aracaju, SE, Brazil
| | | | - Márcia Guimarães Silva
- Universidade Estadual Paulista - Unesp, Botucatu Medical School, Department of Pathology, Botucatu, SP, Brazil
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Palve V, Bagwan J, Krishnan NM, Pareek M, Chandola U, Suresh A, Siddappa G, James BL, Kekatpure V, Kuriakose MA, Panda B. Detection of High-Risk Human Papillomavirus in Oral Cavity Squamous Cell Carcinoma Using Multiple Analytes and Their Role in Patient Survival. J Glob Oncol 2019; 4:1-33. [PMID: 30398949 PMCID: PMC7010445 DOI: 10.1200/jgo.18.00058] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
PURPOSE Accurate detection of human papillomavirus (HPV) in oral cavity squamous cell carcinoma (OSCC) is essential to understanding the role of HPV in disease prognosis and management of patients. We used different analytes and methods to understand the true prevalence of HPV in a cohort of patients with OSCC with different molecular backgrounds, and we correlated HPV data with patient survival. METHODS We integrated data from multiple analytes (HPV DNA, HPV RNA, and p16), assays (immunohistochemistry, polymerase chain reaction [PCR], quantitative PCR [qPCR], and digital PCR), and molecular changes (somatic mutations and DNA methylation) from 153 patients with OSCC to correlate p16 expression, HPV DNA, and HPV RNA with HPV incidence and patient survival. RESULTS High prevalence (33% to 58%) of HPV16/18 DNA did not correlate with the presence of transcriptionally active viral genomes (15%) in tumors. Eighteen percent of the tumors were p16 positive and only 6% were both HPV DNA and HPV RNA positive. Most tumors with relatively high copy number HPV DNA and/or HPV RNA, but not with HPV DNA alone (irrespective of copy number), were wild-type for TP53 and CASP8 genes. In our study, p16 protein, HPV DNA, and HPV RNA, either alone or in combination, did not correlate with patient survival. Nine HPV-associated genes stratified the virus-positive from the virus-negative tumor group with high confidence ( P < .008) when HPV DNA copy number and/or HPV RNA were considered to define HPV positivity, and not HPV DNA alone, irrespective of copy number ( P < .2). CONCLUSION In OSCC, the presence of both HPV RNA and p16 is rare. HPV DNA alone is not an accurate measure of HPV positivity and therefore may not be informative. HPV DNA, HPV RNA, and p16 do not correlate with patients' outcome.
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Affiliation(s)
- Vinayak Palve
- Vinayak Palve, Jamir Bagwan, Neeraja M. Krishnan, Manisha Pareek, Udita Chandola, and Binay Panda, Ganit Labs, Institute of Bioinformatics and Applied Biotechnology; Amritha Suresh, Gangotri Siddappa, Bonney L. James, and Moni Abraham Kuriakose, Mazumdar Shaw Centre for Translational Cancer Research; and Vikram Kekatpure and Moni Abraham Kuriakose, Mazumdar Shaw Medical Centre, Bangalore; Neeraja M. Krishnan and Binay Panda, Ganit Labs Foundation, Delhi, India
| | - Jamir Bagwan
- Vinayak Palve, Jamir Bagwan, Neeraja M. Krishnan, Manisha Pareek, Udita Chandola, and Binay Panda, Ganit Labs, Institute of Bioinformatics and Applied Biotechnology; Amritha Suresh, Gangotri Siddappa, Bonney L. James, and Moni Abraham Kuriakose, Mazumdar Shaw Centre for Translational Cancer Research; and Vikram Kekatpure and Moni Abraham Kuriakose, Mazumdar Shaw Medical Centre, Bangalore; Neeraja M. Krishnan and Binay Panda, Ganit Labs Foundation, Delhi, India
| | - Neeraja M Krishnan
- Vinayak Palve, Jamir Bagwan, Neeraja M. Krishnan, Manisha Pareek, Udita Chandola, and Binay Panda, Ganit Labs, Institute of Bioinformatics and Applied Biotechnology; Amritha Suresh, Gangotri Siddappa, Bonney L. James, and Moni Abraham Kuriakose, Mazumdar Shaw Centre for Translational Cancer Research; and Vikram Kekatpure and Moni Abraham Kuriakose, Mazumdar Shaw Medical Centre, Bangalore; Neeraja M. Krishnan and Binay Panda, Ganit Labs Foundation, Delhi, India
| | - Manisha Pareek
- Vinayak Palve, Jamir Bagwan, Neeraja M. Krishnan, Manisha Pareek, Udita Chandola, and Binay Panda, Ganit Labs, Institute of Bioinformatics and Applied Biotechnology; Amritha Suresh, Gangotri Siddappa, Bonney L. James, and Moni Abraham Kuriakose, Mazumdar Shaw Centre for Translational Cancer Research; and Vikram Kekatpure and Moni Abraham Kuriakose, Mazumdar Shaw Medical Centre, Bangalore; Neeraja M. Krishnan and Binay Panda, Ganit Labs Foundation, Delhi, India
| | - Udita Chandola
- Vinayak Palve, Jamir Bagwan, Neeraja M. Krishnan, Manisha Pareek, Udita Chandola, and Binay Panda, Ganit Labs, Institute of Bioinformatics and Applied Biotechnology; Amritha Suresh, Gangotri Siddappa, Bonney L. James, and Moni Abraham Kuriakose, Mazumdar Shaw Centre for Translational Cancer Research; and Vikram Kekatpure and Moni Abraham Kuriakose, Mazumdar Shaw Medical Centre, Bangalore; Neeraja M. Krishnan and Binay Panda, Ganit Labs Foundation, Delhi, India
| | - Amritha Suresh
- Vinayak Palve, Jamir Bagwan, Neeraja M. Krishnan, Manisha Pareek, Udita Chandola, and Binay Panda, Ganit Labs, Institute of Bioinformatics and Applied Biotechnology; Amritha Suresh, Gangotri Siddappa, Bonney L. James, and Moni Abraham Kuriakose, Mazumdar Shaw Centre for Translational Cancer Research; and Vikram Kekatpure and Moni Abraham Kuriakose, Mazumdar Shaw Medical Centre, Bangalore; Neeraja M. Krishnan and Binay Panda, Ganit Labs Foundation, Delhi, India
| | - Gangotri Siddappa
- Vinayak Palve, Jamir Bagwan, Neeraja M. Krishnan, Manisha Pareek, Udita Chandola, and Binay Panda, Ganit Labs, Institute of Bioinformatics and Applied Biotechnology; Amritha Suresh, Gangotri Siddappa, Bonney L. James, and Moni Abraham Kuriakose, Mazumdar Shaw Centre for Translational Cancer Research; and Vikram Kekatpure and Moni Abraham Kuriakose, Mazumdar Shaw Medical Centre, Bangalore; Neeraja M. Krishnan and Binay Panda, Ganit Labs Foundation, Delhi, India
| | - Bonney L James
- Vinayak Palve, Jamir Bagwan, Neeraja M. Krishnan, Manisha Pareek, Udita Chandola, and Binay Panda, Ganit Labs, Institute of Bioinformatics and Applied Biotechnology; Amritha Suresh, Gangotri Siddappa, Bonney L. James, and Moni Abraham Kuriakose, Mazumdar Shaw Centre for Translational Cancer Research; and Vikram Kekatpure and Moni Abraham Kuriakose, Mazumdar Shaw Medical Centre, Bangalore; Neeraja M. Krishnan and Binay Panda, Ganit Labs Foundation, Delhi, India
| | - Vikram Kekatpure
- Vinayak Palve, Jamir Bagwan, Neeraja M. Krishnan, Manisha Pareek, Udita Chandola, and Binay Panda, Ganit Labs, Institute of Bioinformatics and Applied Biotechnology; Amritha Suresh, Gangotri Siddappa, Bonney L. James, and Moni Abraham Kuriakose, Mazumdar Shaw Centre for Translational Cancer Research; and Vikram Kekatpure and Moni Abraham Kuriakose, Mazumdar Shaw Medical Centre, Bangalore; Neeraja M. Krishnan and Binay Panda, Ganit Labs Foundation, Delhi, India
| | - Moni Abraham Kuriakose
- Vinayak Palve, Jamir Bagwan, Neeraja M. Krishnan, Manisha Pareek, Udita Chandola, and Binay Panda, Ganit Labs, Institute of Bioinformatics and Applied Biotechnology; Amritha Suresh, Gangotri Siddappa, Bonney L. James, and Moni Abraham Kuriakose, Mazumdar Shaw Centre for Translational Cancer Research; and Vikram Kekatpure and Moni Abraham Kuriakose, Mazumdar Shaw Medical Centre, Bangalore; Neeraja M. Krishnan and Binay Panda, Ganit Labs Foundation, Delhi, India
| | - Binay Panda
- Vinayak Palve, Jamir Bagwan, Neeraja M. Krishnan, Manisha Pareek, Udita Chandola, and Binay Panda, Ganit Labs, Institute of Bioinformatics and Applied Biotechnology; Amritha Suresh, Gangotri Siddappa, Bonney L. James, and Moni Abraham Kuriakose, Mazumdar Shaw Centre for Translational Cancer Research; and Vikram Kekatpure and Moni Abraham Kuriakose, Mazumdar Shaw Medical Centre, Bangalore; Neeraja M. Krishnan and Binay Panda, Ganit Labs Foundation, Delhi, India
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Ramya AS, Majumdar S, Babu TM, Uppala D, Srinivas B, Rao AK. Expression of Human Papillomavirus DNA and p53 Polymorphisms through Polymerase Chain Reaction in Normal Mucosa and Oral Leukoplakia Individuals with Deleterious Oral Habits. Int J Appl Basic Med Res 2017; 7:134-138. [PMID: 28584747 PMCID: PMC5441263 DOI: 10.4103/ijabmr.ijabmr_57_16] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Context: Oral leukoplakia (OL) is a well-recognized precancerous lesion with various etiological factors. Most commonly deleterious oral habits such as tobacco smoking and viral etiologies mainly human papillomavirus (HPV) play an important role. p53 polymorphisms mostly homozygous Arginine (Arg) allele has a greater risk of degradation by HPV. Hence, HPV infection and p53 polymorphisms may act as synergistic factors for increased the risk of malignant transformation in oral precancerous lesions. Aims: The aim of this study is to evaluate the risk of OL and its malignant transformation due to infection by HPV and p53 polymorphisms in the oral biopsy samples through polymerase chain reaction (PCR). Subjects and Methods: A total of 40 individuals were involved– 10 individuals were controls without deleterious habits, 15 were controls with deleterious habits, and 15 were with histologically confirmed OL individuals with deleterious habits. PCR and restriction fragment length polymorphism using sma1 enzyme were carried out to evaluate the expression of HPV and p53 polymorphisms. Statistical Analysis Used: Chi-square test, Fischer's exact t-test, and odds ratio. Results: (1) HPV DNA expression was higher in Leukoplakia individuals than controls. (2) p53 genotype with homozygous Arg was more in HPV-infected individuals. Conclusions: To conclude HPV infected OL cases were mostly with Arg/Arg type of p53 polymorphism.
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Affiliation(s)
- Atmakuri Shanmukha Ramya
- Department of Oral Pathology and Microbiology, GITAM Dental College, Visakhapatnam, Andhra Pradesh, India
| | - Sumit Majumdar
- Department of Oral Pathology and Microbiology, GITAM Dental College, Visakhapatnam, Andhra Pradesh, India
| | - T Mahesh Babu
- Department of Oral Pathology and Microbiology, GITAM Dental College, Visakhapatnam, Andhra Pradesh, India
| | - Divya Uppala
- Department of Oral Pathology and Microbiology, GITAM Dental College, Visakhapatnam, Andhra Pradesh, India
| | - Baratam Srinivas
- Department of Orthodontics and Dentofacial Orthopedics, Kalinga Institute of Dental Sciences, Bhubaneswar, Odisha, India
| | - Ayyagari Kameswara Rao
- Department of Oral Pathology and Microbiology, GITAM Dental College, Visakhapatnam, Andhra Pradesh, India
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Pattanshetty S, Kotrashetti VS, Nayak R, Bhat K, Somannavar P, Babji D. PCR based detection of HPV 16 and 18 genotypes in normal oral mucosa of tobacco users and non-users. Biotech Histochem 2014; 89:433-9. [PMID: 24588599 DOI: 10.3109/10520295.2014.887143] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
There is increasing evidence of a causal association between human papillomavirus (HPV) and oral squamous cell carcinoma (OSCC). Several studies have shown that HPV is associated with increased risk of oral cancer independent of exposure to tobacco and alcohol. The association is valid for HPVs 16 and 18, which generally are considered high risk types, because they have been detected in oral dysplastic lesions and cancers. We determined the baseline prevalence of HPVs 16 and 18 in normal oral mucosa of individuals with and without tobacco habit. PCR was used for DNA collected by oral smears to detect HPV 16/18 DNA in normal oral mucosa of 60 healthy individuals who were assigned to two groups of 30 subjects each. One group had a tobacco habit, the other did not. The tobacco user group comprised individuals who were tobacco chewers only. Sixty-five percent of individuals were positive for HPV 16/18 DNA, but HPV 16/18 positivity was less in individuals with tobacco habit than in those without tobacco habit. No significant association was found between the presence of HPVs and gender, age or duration of chewing habit, or between groups with and without a tobacco habit. We propose that HPVs16 and 18 commonly are present in normal oral mucosa and emphasize the importance of distinguishing clinical, subclinical and latent HPV infections when investigating HPVs and OSCC.
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Affiliation(s)
- S Pattanshetty
- Departments of Oral Pathology and Microbiology, Maratha Mandal's NGH Institute of Dental Sciences , Belgaum 590010 Karnataka , India
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Blioumi E, Chatzidimitriou D, Pazartzi C, Katopodi T, Tzimagiorgis G, Emmanouil-Nikoloussi EN, Markopoulos A, Kalekou C, Lazaridis N, Diza E, Antoniades D. Detection and typing of human papillomaviruses (HPV) in malignant, dysplastic, nondysplastic and normal oral epithelium by nested polymerase chain reaction, immunohistochemistry and transitional electron microscopy in patients of northern Greece. Oral Oncol 2014; 50:840-7. [PMID: 25043883 DOI: 10.1016/j.oraloncology.2014.06.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 05/24/2014] [Accepted: 06/12/2014] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To evaluate the role of HPV in oral carcinogenesis, we examined the prevalence of HPV in malignant, potentially malignant and normal oral epithelium and studied the relation of HPV prevalence with other factors obtained from the patient's records. MATERIALS AND METHODS Our material consisted of 291 tissue specimens from 258 individuals. From every individual formalin fixed and paraffin embedded tissues were examined by nested Polymerase Chain Reaction (NPCR) for the detection of HPV DNA and by immunohistochemistry (IHC) for the in situ detection of HPV L1 protein. Positive PCR products were sequenced in order to type HPVs. Also 33 fresh tissues were obtained, fixed and used to detect HPV particles by transitional electron microscopy (TEM). RESULTS HPV was detected in 32.9% of the tissue specimens by NPCR, in 4.7% by immunohistochemistry and in 28.1% by TEM. In detail, by nested PCR HPV L1 DNA was detected in 40% of normal tissues, 40% of fibromas, 35.8% of non-dysplastic leukoplakias, 31.6% of dysplastic leukoplakias and 22.2% of oral squamous cell carcinomas. The HPV viral load of 96.5% of the samples was very low (1 viral copy per 10(2)-10(4) cells). HPV16 prevails in all histological groups in 89-100%. CONCLUSION We conclude that HPV does not seem, from the specific sample examined, to play a substantial role in oral carcinogenesis. However, it cannot be excluded that HPV could be involved in oral carcinogenesis only in cases with high viral load or at early stages of carcinogenesis possibly through the hit-and-run mechanism.
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Affiliation(s)
- E Blioumi
- Department of Stomatology, School of Dentistry, Aristotle University of Thessaloniki, Greece.
| | - D Chatzidimitriou
- B' Department of Microbiology, School of Medicine, Aristotle University of Thessaloniki, Greece
| | - Ch Pazartzi
- Department of Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Greece
| | - Th Katopodi
- Department of Biology, School of Medicine, Aristotle University of Thessaloniki, Greece
| | - G Tzimagiorgis
- Department of Biochemistry, School of Medicine, Aristotle University of Thessaloniki, Greece
| | - E-N Emmanouil-Nikoloussi
- Department of Histology, Embryology and Anthropology, School of Medicine, Aristotle University of Thessaloniki, Greece
| | - A Markopoulos
- Department of Stomatology, School of Dentistry, Aristotle University of Thessaloniki, Greece
| | - C Kalekou
- Department of Stomatology, School of Dentistry, Aristotle University of Thessaloniki, Greece
| | - N Lazaridis
- Department of Orofacial Surgery, School of Dentistry, Aristotle University of Thessaloniki, Greece
| | - E Diza
- Department of Microbiology, AHEPA University General Hospital of Thessaloniki, Greece
| | - D Antoniades
- Department of Stomatology, School of Dentistry, Aristotle University of Thessaloniki, Greece
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Erkhembaatar A, Kawai R, Kato S, Yoshida W, Kamiya K, Nagaya Y, Hattori T, Sugita Y, Kubo K, Maeda H. Hyperplastic Epithelium of Oral Mucosal Lesions Associated with Denture Wearing as a Potential Reservoir of Human Papillomavirus. J HARD TISSUE BIOL 2014. [DOI: 10.2485/jhtb.23.149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Mirghani H, Amen F, Moreau F, Guigay J, Ferchiou M, Melkane AE, Hartl DM, Lacau St Guily J. Human papilloma virus testing in oropharyngeal squamous cell carcinoma: what the clinician should know. Oral Oncol 2013; 50:1-9. [PMID: 24169585 DOI: 10.1016/j.oraloncology.2013.10.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 10/03/2013] [Accepted: 10/08/2013] [Indexed: 10/26/2022]
Abstract
High risk Human Papilloma virus (HR-HPV) associated oropharyngeal cancers are on the increase. Although, the scientific community is aware of the importance of Human Papilloma Virus (HPV) testing, there is no consensus on the assays that are required to reliably identify HR-HPV related tumors. A wide range of methods have been developed. The most widely used techniques include viral DNA detection, with polymerase chain reaction (PCR) or In Situ Hybridization, and p16 detected by immunohistochemistry. However, these tests provide different information and have their own specific limitations. In this review, we summarize these different techniques, in light of the recent literature. p16 Overexpression, which is an indirect marker of HPV infection, is considered by many head and neck oncologists to be the most important marker for patient stratification. We describe the frequent lack of concordance of this marker with other assays and the possible reasons for this. The latest developments in HPV testing are also reported, such as the RNAscope™ HPV test, and how they fit into the existing framework of techniques. HPV testing must not be considered in isolation, as there are important interactions with other parameters, such as tobacco exposure. This is an important and rapidly evolving field and is likely to become pivotal to staging and choice of treatment of oropharyngeal carcinoma in the future.
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Affiliation(s)
- Haïtham Mirghani
- Department of Head and Neck Surgery, Institut de Cancérologie Gustave Roussy, Villejuif, France.
| | - Furrat Amen
- Department of Head and Neck Surgery, Institut de Cancérologie Gustave Roussy, Villejuif, France.
| | - Frederique Moreau
- Department of Virology, Faculty of Medicine, University Pierre et Marie Curie Paris VI and Hospital Tenon Assistance Publique Hôpitaux de Paris, France.
| | - Joel Guigay
- Department of Medical Oncology, Institut de Cancérologie Gustave Roussy, Villejuif, France.
| | - Malek Ferchiou
- Department of Pathology, Institut de Cancérologie Gustave Roussy, Villejuif, France.
| | - Antoine E Melkane
- Department of Head and Neck Surgery, Institut de Cancérologie Gustave Roussy, Villejuif, France.
| | - Dana M Hartl
- Department of Head and Neck Surgery, Institut de Cancérologie Gustave Roussy, Villejuif, France.
| | - Jean Lacau St Guily
- Department of Otolaryngology, Head and Neck Surgery, Faculty of Medicine, University Pierre et Marie Curie Paris VI and Hospital Tenon Assistance Publique Hôpitaux de Paris, France.
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Smoking increases oral HPV persistence among men: 7-year follow-up study. Eur J Clin Microbiol Infect Dis 2013; 33:123-33. [PMID: 24026862 DOI: 10.1007/s10096-013-1938-1] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Accepted: 07/18/2013] [Indexed: 10/26/2022]
Abstract
Persistent high-risk human papillomavirus (HR-HPV) infection is the key event in the progression of HPV lesions, and more data are urgently needed on asymptomatic oral HPV infections in men. Asymptomatic fathers-to-be (n = 131, mean age 28.9 years) were enrolled in the cohort, sampled by serial oral scrapings at baseline and at 2-month, 6-month, 12-month, 24-month, 36-month, and 7-year follow-up visits to accomplish persistent and cleared HPV infections. HPV genotyping was performed using nested PCR and Multimetrix® assay. Covariates of persistent and cleared oral HPV infections were analysed using generalised estimating equation (GEE) and Poisson regression. Altogether, 17 HPV genotypes were detected in male oral mucosa point prevalence, varying from 15.1 % to 31.1 %. Genotype-specific HPV persistence was detected in 18/129 men the mean persistence time ranging from 6.0 to 30.7 months. History of genital warts decreased (p = 0.0001; OR = 0.41, 95 % CI 0.33-0.51) and smoking increased (p = 0.033, OR = 1.92, 95 % CI 1.05-3.50) the risk of persistent species 7/9 HPV infections. Of the 74 HPV-positive men, 71.6 % cleared their infection actuarial and crude clearance times, varying between 1.4 and 79.6 months. No independent predictors were identified for species 7/9 clearance. At the last follow-up-visit, 50.1 % of the fathers had oral mucosal changes, correlating only with smoking (p = 0.046). To conclude, most of the persisting oral infections in males were caused by HPV16. Smoking increased while previous genital warts decreased oral HR-HPV persistence. No predictors of HR-HPV clearance were disclosed.
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Prevalence of human papillomavirus in saliva and cervix of sexually active women. Gynecol Oncol 2013; 129:395-400. [DOI: 10.1016/j.ygyno.2013.02.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 02/06/2013] [Accepted: 02/10/2013] [Indexed: 11/19/2022]
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Abstract
BACKGROUND Little is known about the rates and determinants of oral human papillomavirus (HPV) infection, an infection that is etiologically linked with oropharyngeal cancers. METHODS A cohort of male university students (18-24 years) was examined every 4 months (212 men, 704 visits). Oral specimens were collected via gargle/rinse and swabbing of the oropharynx. Genotyping for HPV-16 and 36 other α-genus types was performed by polymerase chain reaction-based assay. Data on potential determinants were gathered via clinical examination, in-person questionnaire, and biweekly online diary. Hazards ratios (HR) were used to measure associations with incident infection. RESULTS Prevalence of oral HPV infection at enrollment was 7.5%, and 12-month cumulative incidence was 12.3% (95% confidence interval [CI], 7.0, 21.3). Prevalence of oral HPV-16 was 2.8% and 12-month cumulative incidence was 0.8% (95% CI, 0.1%-5.7%). None of the incident oral HPV infections and 28.6% of the prevalent oral HPV infections were detected more than once. In a multivariate model, incident oral HPV infection was associated with recent frequency of performing oral sex (≥1 per week: HR, 3.7; 95% CI, 1.4-9.8), recent anal sex with men (HR, 42.9; 95% CI, 8.8-205.5), current infection with the same HPV type in the genitals (HR, 6.2; 95% CI, 2.4-16.4), and hyponychium (HR, 11.8, 95% CI, 4.1-34.2). CONCLUSIONS Although nearly 20% of sexually active male university students had evidence of oral HPV infection within 12 months, most infections were transient. Human papillomavirus type 16 was not common. Sexual contact and autoinoculation appeared to play independent roles in the transmission of α-genus HPV to the oral cavity of young men.
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Louvanto K, Rautava J, Willberg J, Wideman L, Syrjänen K, Grénman S, Syrjänen S. Genotype-specific incidence and clearance of human papillomavirus in oral mucosa of women: a six-year follow-up study. PLoS One 2013; 8:e53413. [PMID: 23301068 PMCID: PMC3536668 DOI: 10.1371/journal.pone.0053413] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 11/28/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND There are no previous longitudinal studies on genotype-specific natural history of human papillomavirus (HPV) infections in oral mucosa of women. METHODS In the Finnish Family HPV Study, 329 pregnant women were enrolled and followed up. HPV-genotyping of oral scrapings was performed with nested PCR and Multimetrix® test (Progen, Heidelberg, Germany). Incidence and clearance times and rates for each HPV-genotype identified in oral mucosa were determined. Predictors for incident and cleared HPV infections for species 7/9 genotypes were analyzed using Poisson regression model. RESULTS Altogether, 115 baseline HPV-negative women acquired incident oral HPV infection, and 79 women cleared their infection. HPV16 and multiple HPVs most frequently caused incident infections (65% and 12%) in 13.3 and 17.1 months respectively, followed by HPV58, HPV18 and HPV6 (close to 5% each) in 11-24 months. HPV58, HPV18 and HPV66 were the most common to clear. HPV6 and HPV11 had the shortest clearance times, 4.6 months and 2.5 months, and the highest clearance rates, 225.5/1000 wmr and 400/1000 wmr, respectively. The protective factors for incident oral HPV-species 7/9 infections were 1) new pregnancy during follow-up and 2) having the same sexual partner during FU. Increased clearance was related with older age and a history of atopic reactions, whereas previous sexually transmitted disease and new pregnancy were associated with decreased clearance. CONCLUSIONS HPV16 was the most frequent genotype to cause an incident oral HPV-infection. Low risk HPV genotypes cleared from oral mucosa more quickly than high risk HPV genotypes. Pregnancy affected the outcome of oral HPV infection.
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Affiliation(s)
- Karolina Louvanto
- Department of Oral Pathology, Institute of Dentistry, Faculty of Medicine and Medicity Research Laboratory, University of Turku, Turku, Finland
- Department of Obstetrics and Gynecology, Turku University Hospital, University of Turku, Turku, Finland
| | - Jaana Rautava
- Department of Oral Pathology, Institute of Dentistry, Faculty of Medicine and Medicity Research Laboratory, University of Turku, Turku, Finland
- * E-mail:
| | - Jaana Willberg
- Department of Oral Pathology, Institute of Dentistry, Faculty of Medicine and Medicity Research Laboratory, University of Turku, Turku, Finland
| | - Lilli Wideman
- Department of Oral Pathology, Institute of Dentistry, Faculty of Medicine and Medicity Research Laboratory, University of Turku, Turku, Finland
| | - Kari Syrjänen
- Department of Oncology and Radiotherapy, Turku University Hospital, Turku, Finland
- Teaching and Research Institute, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
| | - Seija Grénman
- Department of Obstetrics and Gynecology, Turku University Hospital, University of Turku, Turku, Finland
| | - Stina Syrjänen
- Department of Oral Pathology, Institute of Dentistry, Faculty of Medicine and Medicity Research Laboratory, University of Turku, Turku, Finland
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Rautava J, Willberg J, Louvanto K, Wideman L, Syrjänen K, Grénman S, Syrjänen S. Prevalence, genotype distribution and persistence of human papillomavirus in oral mucosa of women: a six-year follow-up study. PLoS One 2012; 7:e42171. [PMID: 22952591 PMCID: PMC3431392 DOI: 10.1371/journal.pone.0042171] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Accepted: 07/04/2012] [Indexed: 01/22/2023] Open
Abstract
Background Human papillomavirus (HPV) infections have been linked to a subset of oral and oropharyngeal cancers. However, little is known on the natural history of oral HPV infections. We designed the prospective Finnish HPV Family Study to assess the dynamics of HPV infections in parents and their infants. This study reports HPV genotype distribution and virus persistence in oral mucosa of the mothers. Materials and Methods Totally, 324 pregnant women were enrolled at the 3rd trimester of pregnancy and followed-up for 6 years. Oral scrapings taken with a brush were collected and HPV-genotyping was performed with nested PCR and Multimetrix® test (Progen, Heidelberg, Germany). The predictors of persistent oral HPV species 7/9 infections were analyzed using generalized estimating equation models. Results The point prevalence of oral HPV varied from 15% to 24% during the 6-year follow-up. Altogether, 18 HPV genotypes were identified either as single or multiple-type oral infections. HPV16 was the most prevalent type at 9.7%–18.4%, followed by HPV18, HPV6, and multiple infections. Altogether, 74 women had persistent oral HPV infection determined as at least two consecutive samples positive with the same HPV genotype. HPV16 and HPV6 were the two most frequent types to persist (76% and 9%) for a mean of 18.6 and 20.2 months, respectively, followed by multiple infections (8%) for 18.3 months. An increased risk for persistent oral HPV infection with species 7/9 was associated with being seropositive for low-risk (LR)-HPV-types at baseline, whereas the use of oral contraceptives and a second pregnancy during follow-up were protective. Clinical oral lesions were detected in 17% of these women, one-third of whom had persistent oral HPV-infections. Conclusion HPV16 and HPV6 were the most common genotypes in oral HPV-infections and were also most likely to persist. Use of oral contraceptives and a second pregnancy protected against oral HPV persistence.
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Affiliation(s)
- Jaana Rautava
- Department of Oral Pathology, Institute of Dentistry, and Medicity Research Laboratory, Faculty of Medicine, University of Turku, Turku, Finland
| | - Jaana Willberg
- Department of Oral Pathology, Institute of Dentistry, and Medicity Research Laboratory, Faculty of Medicine, University of Turku, Turku, Finland
| | - Karolina Louvanto
- Department of Oral Pathology, Institute of Dentistry, and Medicity Research Laboratory, Faculty of Medicine, University of Turku, Turku, Finland
| | - Lilli Wideman
- Department of Oral Pathology, Institute of Dentistry, and Medicity Research Laboratory, Faculty of Medicine, University of Turku, Turku, Finland
| | - Kari Syrjänen
- Department of Oncology and Radiotherapy, Turku University Hospital, Turku, Finland
| | - Seija Grénman
- Department of Obstetrics and Gynecology, Turku University Hospital, Turku, Finland
| | - Stina Syrjänen
- Department of Oral Pathology, Institute of Dentistry, and Medicity Research Laboratory, Faculty of Medicine, University of Turku, Turku, Finland
- * E-mail:
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Gichki AS, Buajeeb W, Doungudomdacha S, Khovidhunkit SOP. Detection of Human Papillomavirus in Normal Oral Cavity in a Group of Pakistani Subjects using Real-Time PCR. Asian Pac J Cancer Prev 2012; 13:2299-304. [DOI: 10.7314/apjcp.2012.13.5.2299] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Termine N, Giovannelli L, Rodolico V, Matranga D, Pannone G, Campisi G. Biopsy vs. brushing: comparison of two sampling methods for the detection of HPV-DNA in squamous cell carcinoma of the oral cavity. Oral Oncol 2012; 48:870-5. [PMID: 22498489 DOI: 10.1016/j.oraloncology.2012.03.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 03/02/2012] [Accepted: 03/02/2012] [Indexed: 11/16/2022]
Abstract
BACKGROUND HR HPV infection was proposed as aetiological factor of oral squamous cell carcinomas (OSCC). HPV frequency in OSCC is highly variable, due to the discrepancy in oral sampling procedures, HPV testing methods and inclusion criteria regarding tumour site (strictly oral cavity vs. nearby structures). Our aim was to compare HPV DNA frequency and type-specific distribution in paired cytological and histological samples of SCC strictly located in oral cavity. The correlation between HPV detection rate by each method of sampling and demographical, behavioural and clinical-pathological variables was also examined. PATIENTS AND METHODS HPV DNA was detected in brushed cells and formalin-fixed paraffin-embedded biopsies obtained from 83 consecutive unselected immunocompetent adults with OSCC. HPV DNA detection was performed in all samples by nPCR followed by direct DNA sequencing and the assay INNO-LiPA HPV Genotyping. Univariate and multivariate statistics were used, including Cohen κ index to evaluate agreement between two methods and association between HPV infection and demographical, behavioural and clinical-pathological variables for each method of sampling (p<0.05 statistically significant). RESULTS HPV DNA was detected in 15.7% (13/83) of brushings and 12.1% (10/83) of biopsies (p>0.05). High risk HPV 51, 16 and 39 were genotypes more frequently detected, especially among biopsies; no concordance between two methods was found (Cohen κ index=0.04, p=0.34). CONCLUSION A fraction of OSCC could be linked to HR HPV infection in the Mediterranean area. Although without a statistical significance, biopsy specimen demonstrated more accurate for HR HPV detection than brushing in OSCC.
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Affiliation(s)
- N Termine
- Section of Oral Sciences, Sector of Oral Medicine, Department of Surgical and Oncologic Disciplines, University of Palermo, Palermo, Italy
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Castillo A, Koriyama C, Higashi M, Anwar M, Bukhari MH, Carrascal E, Mancilla L, Okumura H, Matsumoto M, Sugihara K, Natsugoe S, Eizuru Y, Akiba S. Human papillomavirus in upper digestive tract tumors from three countries. World J Gastroenterol 2011; 17:5295-304. [PMID: 22219599 PMCID: PMC3247694 DOI: 10.3748/wjg.v17.i48.5295] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Revised: 07/11/2011] [Accepted: 07/18/2011] [Indexed: 02/06/2023] Open
Abstract
AIM: To clarify human papillomavirus (HPV) involvement in carcinogenesis of the upper digestive tract of virological and pathological analyses.
METHODS: The present study examined the presence of HPV in squamous cell carcinomas of the oral cavity (n = 71), and esophagus (n = 166) collected from Japan, Pakistan and Colombia, with different HPV exposure risk and genetic backgrounds. The viral load and physical status of HPV16 and HPV16-E6 variants were examined. Comparison of p53 and p16INK4a expression in HPV-positive and HPV-negative cases was also made.
RESULTS: HPV16 was found in 39 (55%) oral carcinomas (OCs) and 24 (14%) esophageal carcinomas (ECs). This site-specific difference in HPV detection between OCs and ECs was statistically significant (P < 0.001). There was a significant difference in the geographical distribution of HPV16-E6 variants. Multiple infections of different HPV types were found in 13 ECs, but multiple infections were not found in OCs. This difference was statistically significant (P = 0.001). The geometric means (95% confidence interval) of HPV16 viral load in OCs and ECs were 0.06 (0.02-0.18) and 0.12 (0.05-0.27) copies per cell, respectively. The expression of p16INK4a proteins was increased by the presence of HPV in ECs (53% and 33% in HPV-positive and -negative ECs, respectively; P = 0.036), and the high-risk type of the HPV genome was not detected in surrounding normal esophageal mucosa of HPV-positive ECs.
CONCLUSION: Based on our results, we cannot deny the possibility of HPV16 involvement in the carcinogenesis of the esophagus.
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Torrente MC, Rodrigo JP, Haigentz M, Dikkers FG, Rinaldo A, Takes RP, Olofsson J, Ferlito A. Human papillomavirus infections in laryngeal cancer. Head Neck 2011; 33:581-6. [PMID: 20848441 DOI: 10.1002/hed.21421] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Although the association and clinical significance of human papillomavirus (HPV) infections with a subset of head and neck cancers, particularly for oropharyngeal carcinoma, has recently been well documented, the involvement of HPV in laryngeal cancer has been inadequately evaluated. Herein we review the currently known associations of HPV infections in diseases of the larynx and their potential for oncogenicity. Using several methods of detection, HPV DNA has been detected in benign (papillomatosis), indolent (verrucous carcinoma), and malignant (squamous cell carcinoma) lesions of the larynx. Consistent with the known oncogenic risk of HPV infections, common HPV types associated with laryngeal papillomatosis include low-risk HPV types 6 and 11, with high-risk HPV types 16 and 18 more commonly present in neoplastic lesions (verrucous carcinoma and squamous cell carcinoma). Although a broad range of prevalence has been noted in individual studies, approximately 25% of laryngeal squamous cell carcinomas harbor HPV infections on meta-analysis, with common involvement of high-risk HPV types 16 (highest frequency) and 18. Preliminary results suggest that these high-risk HPV infections seem to be biologically relevant in laryngeal carcinogenesis, manifested as having viral DNA integration in the cancer cell genome and increased expression of the p16 protein. Despite this knowledge, the clinical significance of these infections and the implications on disease prevention and treatment are unclear and require further investigation.
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Affiliation(s)
- Mariela C Torrente
- Departamento de Otorrinolaringologia, Universidad de Chile, Santiago de Chile, Chile
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Evans MF, Matthews A, Kandil D, Adamson CSC, Trotman WE, Cooper K. Discrimination of 'driver' and 'passenger' HPV in tonsillar carcinomas by the polymerase chain reaction, chromogenic in situ hybridization, and p16(INK4a) immunohistochemistry. Head Neck Pathol 2011; 5:344-8. [PMID: 21786153 PMCID: PMC3210222 DOI: 10.1007/s12105-011-0282-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Accepted: 07/08/2011] [Indexed: 11/25/2022]
Abstract
Human papillomavirus (HPV) positive tonsillar squamous cell carcinoma (TSCC) is associated with a favorable clinical outcome. However, the HPV detected in a given tumor may be causal (driver HPV) or an incidental bystander (passenger HPV). There is a need to discriminate these forms of HPV in TSCCs to understand their impact on HPV as a biomarker for use in TSCC patient management. This study has compared the polymerase chain reaction (PCR), chromogenic in situ hybridization (CISH), and p16(INK4a) immunohistochemistry in the assessment of HPV status in TSCC. Archival specimens of TSCC from thirty patients were investigated. HPV was detected by PCR in 25/30 (83.3%) tumors; HPV16 (70.0%) and HPV52 (6.7%) were the most common types. HPV was corroborated by CISH in 22/25 (88.0%) specimens; integrated HPV was implicated by the presence of punctate signals in each of these cases. p16(INK4a) staining was found in 20/22 (90.9%) HPV PCR positive samples; two PCR/CISH HPV positive cases were p16(INK4a) negative and two HPV negative samples were p16(INK4a) positive. These data suggest that a minority of HPV positive TSCCs are positive for passenger HPV and that two or more assays may be required for diagnosing driver HPV status. Further studies are required to exam whether oropharyngeal tumors positive for passenger HPV have a less favorable prognosis than tumors that are driver HPV positive. The clinical significance of TSCCs that test HPV negative/p16(INK4a) positive, PCR and CISH HPV positive/p16 (INK4a) negative, or PCR HPV positive/p16 (INK4a) and CISH negative, also requires further investigation.
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Affiliation(s)
- Mark Francis Evans
- Department of Pathology, University of Vermont College of Medicine, Burlington, VT 05405, USA.
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Migaldi M, Pecorari M, Forbicini G, Nanni N, Grottola A, Grandi T, Delle Donne G, Leocata P, Trovato D, Sgambato A. Low prevalence of human papillomavirus infection in the healthy oral mucosa of a Northern Italian population. J Oral Pathol Med 2011; 41:16-20. [PMID: 21762429 DOI: 10.1111/j.1600-0714.2011.01062.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Oral cancer is the sixth most common malignancy in developed countries, representing almost 3% of malignant tumors. Tobacco use and alcohol consumption are well-established risk factors. However, the observation that most patients with oral cancer have not been exposed to these risk factors suggests that additional causes may promote oral carcinogenesis. A link has been suggested between human papillomavirus (HPV) and oral cavity cancer but the significance of HPV contribution to oral carcinogenesis as well as the prevalence of HPV infection in normal oral cavity mucosa remains debated. METHODS In this study, the prevalence of oral HPV infection was evaluated in 81 randomly selected Northern Italian subjects with clinically normal oral mucosa using a nested PCR on DNA extracted by oral smears. RESULTS AND CONCLUSIONS No HPV-related lesions were detectable in any of the smears analyzed by cytological approach. nPCR identified HPV DNA in only one (1.2%) of the specimens obtained from clinically healthy oral mucosa and subsequent characterization assigned the positive case to HPV type 90. These data suggest that the incidence of HPV infection in the healthy population might be very low and that other risk factors are likely responsible to promote oral carcinogenesis.
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Affiliation(s)
- M Migaldi
- Section of Pathology, Azienda Ospedaliero-Universitaria Policlinico, University of Modena-Reggio Emilia, Modena, Italy
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Oral HPV infection and sexuality: a cross-sectional study in women. Int J Mol Sci 2011; 12:3928-40. [PMID: 21747715 PMCID: PMC3131599 DOI: 10.3390/ijms12063928] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 04/12/2011] [Accepted: 06/03/2011] [Indexed: 01/22/2023] Open
Abstract
Human Papillomavirus (HPV) is the main risk factor for cervical cancers and is associated with close to 36% of oropharyngeal cancers. There is increasing evidence that oral HPV transmission is related to sexual behavior but to our knowledge studies that involve women who have sex with women have not been performed. We examined the prevalence of oral HPV according to sexual behavior among a population-based sample of 118 women and have made some inferences of possible predictors of oral HPV infection. Women were categorized as heterosexual (history of vaginal sex and/or oral sex with males only, n = 75), bisexual (history of vaginal sex and oral sex with females, n = 32) and other (no history of vaginal sex but oral sex with females [homosexuals], virgins and women with incomplete sexual exposure data, n = 11) The prevalence of oral HPV infection was 12/118 (10.2%) for the overall study population and was not significantly different between heterosexual and bisexual women (10.7% (8/75) vs. 12.5% (4/32), p = 0.784). There was no oral HPV detected among homosexual women, virgins or among women where sexual exposure was unknown. Never smokers were more likely to be oral HPV+ compared to former smokers (Adjusted Odds Ratio (Adj OR) = 0.1, 95% CI, 0.0–1.1) and there was no difference in risk between never smokers and current smokers (Adj OR = 0.7, 95% CI, 0.1–4.6). Twenty-five percent (3/12) of oral HPV+ women had a history of HPV and/or genital warts compared to 9% (10/106) of oral HPV-women (p = 0.104). For the women with a history of vaginal sex (n = 110), oral HPV status was statistically significantly different according to oral sex exposure (p = 0.039). A higher proportion of oral HPV-positive women reported that they had no history of oral sex exposure compared to oral HPV-negative women (4/12, 33% vs. 7/98, 8%). The prevalence of cervical HPV infection did not vary between heterosexuals and bisexuals (35.7% (25/70) vs. 35.5% (11/31), p-value 0.411) and for all other women the cervical HPV prevalence was significantly lower (11.1%, 1/9). Our study suggests that smoking and sexual behavior involving males rather than female partners may be possible predictors of oral HPV infection in women. Further studies with larger sample size are needed to confirm these findings.
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Sánchez-Vargas LO, Díaz-Hernández C, Martinez-Martinez A. Detection of Human Papilloma Virus (HPV) in oral mucosa of women with cervical lesions and their relation to oral sex practices. Infect Agent Cancer 2010; 5:25. [PMID: 21129222 PMCID: PMC3014881 DOI: 10.1186/1750-9378-5-25] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Accepted: 12/04/2010] [Indexed: 12/01/2022] Open
Abstract
Background Previous studies have either investigated the relationship of HPV with oral cancer or the prevalence of HPV on the oral cavity. The purpose of this investigation was to study the prevalence of HPV in oral cavity of women with oral sex practices and cervical lesions. Methods Forty six (46) non-smokers and non-alcoholic patients attended the "Clínica de Displasias" of "Ciudad Juarez" were sampled. This population had a CIN diagnosis sometime between the previous six months. On previous consent they filled out a questionnaire related to their oral sex practices. Afterwards one swab from cheeks and another from palate/gum were taken; PCR was used to determine generic HPV, HPV16 and HPV18. Results Seventy two percent (72%) of the patients stated to have oral sex practices regularly which all of them were positive to HPV either in oral mucus, palate/gum or both. The total of the given results showed that 35% had HPV16; among those distributed in 26% with regular oral sex practices and 9% stated as never practiced oral sex. An association was found between oral HPV16 positivity and progression to cervical CIN advanced lesions. On the other hand HPV18 was not detected. The frequency of HPV16 was higher in buccal mucosa (23%) versus palate/gum (16%). Conclusions This study suggests that buccal HPV16 infection is associated with CIN progression.
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Affiliation(s)
- Luis O Sánchez-Vargas
- Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, Chihuahua, México.
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Klingenberg B, Hafkamp HC, Haesevoets A, Manni JJ, Slootweg PJ, Weissenborn SJ, Klussmann JP, Speel EJM. p16 INK4A overexpression is frequently detected in tumour-free tonsil tissue without association with HPV. Histopathology 2010; 56:957-67. [PMID: 20636796 DOI: 10.1111/j.1365-2559.2010.03576.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
AIMS Oncogenic human papillomavirus (HPV) type 16 has been strongly associated with tonsillar squamous cell carcinoma (TSCC) and appears to be of prognostic significance. Because HPV+ TSCC also accumulates p16(INK4A), this cyclin-dependent kinase inhibitor has been proposed as a potential biomarker for HPV in clinical diagnosis. The aim of this study was to determine the prevalence of HPV in tumour-free tonsillar tissue and the value of p16(INK4A) overexpression in predicting its presence. METHODS AND RESULTS p16(INK4A) overexpression was detected by immunohistochemistry in tissue sections of tumour-free tonsils of 262 patients. They were treated for non-oncological reasons (snoring or chronic/recurrent tonsillitis) consisting of tonsillectomy. Genomic DNA isolated from these tissues was subjected to HPV-specific polymerase chain reaction (PCR) analysis. p16(INK4A) immunoreactivity was detected in 28% of samples in both crypt epithelium (49/177) and lymphoid germinal centres (52/187), which correlated with each other (P < 0.0001). No reactivity was observed in superficial squamous cell epithelium. HPV16 and 18 were detected by PCR analysis in 2/195 cases (1%), which, however, were negative on fluorescence in situ hybridization analysis and discrepant on p16(INK4A) immunostaining. CONCLUSIONS No proof was found for the presence of HPV in tumour-free tonsil tissue, despite increased p16(INK4A) expression in a quarter of tonsil cases. Other mechanisms than HPV infection are therefore implicated in p16(INK4A) up-regulation.
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Affiliation(s)
- Boris Klingenberg
- Department of Molecular Cell Biology, GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, the Netherlands
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dos Santos Pinheiro R, de França TRT, de Carvalho Ferreira D, Beder Ribeiro CM, Leão JC, Castro GF. Human papillomavirus in the oral cavity of children. J Oral Pathol Med 2010; 40:121-6. [DOI: 10.1111/j.1600-0714.2010.00954.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Winters R, Trotman W, Adamson CSC, Rajendran V, Tang A, Elhosseiny A, Evans MF. Screening for human papillomavirus in basaloid squamous carcinoma: utility of p16(INK4a), CISH, and PCR. Int J Surg Pathol 2010; 19:309-14. [PMID: 20798066 DOI: 10.1177/1066896910380683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This study compares p16( INK4a) immunohistochemistry (IHC), HPV chromogenic in situ hybridization (ISH), and HPV polymerase chain reaction (PCR) genotyping for detection of HPV infection in basaloid squamous carcinoma (BSCC). A retrospective histopathological analysis of 40 BSCC from a single institution was carried out. p16 IHC, HPV DNA extraction and ISH, and HPV PCR genotyping were performed, and there was excellent agreement between all 3 methods of HPV detection. Analysis of variance yielded no significant differences between the results of the 3 tests ( P = .354) and Pearson product-moment correlation coefficients calculated for each pair of tests demonstrated direct correlation (r = .61 for PCR and IHC, r = .61 for PCR and ISH, and r = 1.00 for ISH and IHC). This supports the use of p16(INK4a) IHC as an initial screening tool for HPV infection in BSCC, while definitive evidence of HPV DNA can be sought subsequently with PCR or CISH.
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Affiliation(s)
- Ryan Winters
- Department of Otolaryngology, Tulane University, New Orleans, LA 70115, USA.
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28
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Horewicz VV, Feres M, Rapp GE, Yasuda V, Cury PR. Human papillomavirus-16 prevalence in gingival tissue and its association with periodontal destruction: a case-control study. J Periodontol 2010; 81:562-8. [PMID: 20367098 DOI: 10.1902/jop.2009.090571] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Human papillomavirus (HPV)-16 is detected in normal oral mucosa and several oral lesions, including squamous cell carcinoma, condyloma acuminatum, verruca vulgaris, focal epithelial hyperplasia, and periodontal diseases. It was hypothesized that HPV may be involved in periodontal breakdown and that periodontal tissue acts as a reservoir for the virus. Therefore, in this study, the prevalence of HPV-16 in the gingival tissue of Brazilians with periodontal health or disease is investigated. METHODS Fifty-six gingival samples from subjects with chronic periodontitis, 26 samples from subjects with gingivitis, and 22 samples from subjects with healthy peridontium were analyzed. Total DNA was extracted, and the presence of HPV-16 was assessed using a real-time polymerase chain reaction. Positive and negative controls were included in the reactions. RESULTS HPV-16 was not detected in any of the 104 gingival samples evaluated; therefore, this virus showed no association with periodontal disease in this study. CONCLUSION In the population studied, HPV-16 may not have participated in the pathogenesis of chronic periodontitis, and the gingival tissue did not act as a reservoir for this virus.
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Affiliation(s)
- Verônica V Horewicz
- Research Group on Periodontal Disease, Department of Periodontics, School of Dentistry, Federal University of Bahia, Salvador, BA, Brazil
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29
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Mehrotra R, Chaudhary AK, Pandya S, Debnath S, Singh M, Singh M. Correlation of addictive factors, human papilloma virus infection and histopathology of oral submucous fibrosis. J Oral Pathol Med 2010; 39:460-4. [DOI: 10.1111/j.1600-0714.2009.00849.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Campisi G, Giovannelli L. Controversies surrounding human papilloma virus infection, head & neck vs oral cancer, implications for prophylaxis and treatment. HEAD & NECK ONCOLOGY 2009; 1:8. [PMID: 19331691 PMCID: PMC2673223 DOI: 10.1186/1758-3284-1-8] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/20/2009] [Accepted: 03/30/2009] [Indexed: 11/26/2022]
Abstract
Head & Neck Cancer (HNC) represents the sixth most common malignancy worldwide and it is historically linked to well-known behavioural risk factors, i.e., tobacco smoking and/or the alcohol consumption. Recently, substantial evidence has been mounting that Human Papillomavirus (HPV) infection is playing an increasing important role in oral cancer. Because of the attention and clamor surrounding oral HPV infection and related cancers, as well as the use of HPV prophylactic vaccines, in this invited perspective the authors raise some questions and review some controversial issues on HPV infection and its role in HNC, with a particular focus on oral squamous cell carcinoma. The problematic definition and classification of HNC will be discussed, together with the characteristics of oral infection with oncogenic HPV types, the frequency of HPV DNA detection in HNC, the location of HPV-related tumours, the severity and prognosis of HPV-positive HNC, the diagnosis of oral HPV infection, common routes of oral infection and the likelihood of oro-genital HPV transmission, the prevention of HPV infection and novel therapeutic approaches.
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Affiliation(s)
- Giuseppina Campisi
- Settore di Medicina Orale, Dip. di Scienze Stomatologiche, Università Palermo, Via del Vespro 129-90127, Palermo, Italy.
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Varnai AD, Bollmann M, Bankfalvi A, Kovacs K, Heller H, Schmitt C, Volek J, Szendy M, Bollmann R, Hildenbrand R. The prevalence and distribution of human papillomavirus genotypes in oral epithelial hyperplasia: proposal of a concept. J Oral Pathol Med 2008; 38:181-7. [PMID: 19141061 DOI: 10.1111/j.1600-0714.2008.00723.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Evidence is accumulating for the aetiological role of human papillomavirus (HPV) in the pathogenesis of potentially malignant oral mucosal lesions and squamous cell carcinomas. METHODS Paraffin tissue sections from 49 patients with 'white patches' of the oral mucosa were investigated histologically, by broad-spectrum PCR followed by genotyping and chromogenic in situ hybridisation (CISH). RESULTS Histologically, 33 flat hyperplasias and 16 papillary hyperplasias were diagnosed. Twenty-two of 28 samples studied (78.6%) were positive for HPV DNA by PCR and six were negative. The following HPV types were detected in decreasing order of prevalence: HPV 35, HPV 6, HPV16, HPV 53, HPV 18, HPV 51 and HPV 55. Seventeen samples (60.7%) contained high-risk HPV DNA. Using CISH, >or= 1 HPV signals were detected at least in a few epithelial cells in 95% of cases studied. All but one case were positive with the high-risk HPV probe and all HPV infections contained low viral load. Concordant positive results both by PCR and CISH were detected in 14 of 19 cases (73.7%) analysed. CONCLUSIONS The high prevalence of HPV infection in hyperplastic 'white patches' of the oral mucosa supports the putative role of HPV at an early stage of oral carcinogenesis. These results further indicate that the majority of white oral mucosal lesions - flat, exophytic, wart-like or papillary proliferations - could be considered as the clinical manifestations of oral HPV infection. This finding has clinical relevance regarding therapy and patient management and may help in elucidating the role of HPV infection in oral carcinogenesis.
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32
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Richter KL, Van Rensburg EJ, Van Heerden WFP, Boy SC. Human papilloma virus types in the oral and cervical mucosa of HIV-positive South African women prior to antiretroviral therapy. J Oral Pathol Med 2008; 37:555-9. [DOI: 10.1111/j.1600-0714.2008.00670.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Matsukura T, Sugase M. Pitfalls in the epidemiologic classification of human papillomavirus types associated with cervical cancer using polymerase chain reaction: driver and passenger. Int J Gynecol Cancer 2008; 18:1042-50. [PMID: 18248389 DOI: 10.1111/j.1525-1438.2007.01157.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Cervical cancer is a common malignancy in women worldwide, and it has now been established that the human papillomavirus (HPV) is both necessary and causal for these lesions. HPV itself is both ubiquitous and markedly heterogeneous but can nevertheless be classified as either a high-risk type or a low-risk type based upon its frequency of detection in cervical cancer. Given that the association between HPV and cervical cancer is causal, the classification of this virus has been strengthened by large-scale epidemiologic studies and is widely accepted across many disciplines. It is evident, however, that cervical cancer is frequently associated with multiple HPV types. Therefore, it is crucial to distinguish causal types of HPV (drivers) from noncausal types (passengers) in cervical lesions. In this review, we highlight the current pitfalls of using polymerase chain reaction methods instead of Southern blot hybridization for detecting HPV and discuss the distinction between driver and passenger HPVs with regard to the viral type, the length of the viral genome, and the levels of viral DNA associated with cervical cancer. Finally, we newly propose three categories of HPV instead of two risk groups, based on similarities between viral genes.
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Affiliation(s)
- T Matsukura
- National Institute of Infectious Diseases, Tokyo, Japan; and Department of Obstetrics and Gynecology, Nagano Red Cross Hospital, Nagano, Japan
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34
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Anaya-Saavedra G, Ramírez-Amador V, Irigoyen-Camacho ME, García-Cuellar CM, Guido-Jiménez M, Méndez-Martínez R, García-Carrancá A. High association of human papillomavirus infection with oral cancer: a case-control study. Arch Med Res 2007; 39:189-97. [PMID: 18164962 DOI: 10.1016/j.arcmed.2007.08.003] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2007] [Accepted: 08/08/2007] [Indexed: 12/23/2022]
Abstract
BACKGROUND The aim of the present study was to determine the association of high-risk human papillomavirus (HR-HPV) in Mexican individuals with oral squamous cell carcinoma (OSCC) and their association with various risk factors. METHODS We designed a matched case-control study. Cases were individuals with newly diagnosed OSCC, age- and sex-matched with controls (1:4). Demographic and clinical data were obtained; also a self-administered questionnaire about sexual behavior was included. DNA from oral brushing was purified to amplify HPV-DNA through MY09/MY11 and GP5+/GP6+ primers and subsequently subjected to sequencing. Conditional regression models were built to calculate odds ratios (ORs) and 95% confidence intervals (CI). RESULTS Sixty two cases and 248 controls (53.2% males), median age 62 years (Q1-Q3=54-72 years) were included. HPV prevalence was 43.5% in cases and 17.3% in controls (HR-HPV: 37.1% cases, 9.7% controls). The most frequent types in cases were HPV-16 and HPV-18 (55.6 and 18.5%). The presence of HR-HPV was associated with OSCC (OR=6.2; 95% CI: 2.98-12.97) controlling for the most common risk factors. An interaction between smoking and drinking was detected, and family history of cancer was also significant (OR: 3.61; 95% CI=1.44-8.99). Early age at first sexual intercourse and large number of lifetime sexual partners showed an association with HR-HPV (p=0.019 and p=0.033, respectively). CONCLUSIONS Oral HR-HPV was strongly associated with OSCC, suggesting that HPV-16 and -18 are risk factors for oral cancer in Mexican patients. A significant association of tobacco and alcohol was confirmed. In addition, family history of cancer was associated with OSCC. The results underline the role of HPV in OSCC and its multifactorial etiology.
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35
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Koyama K, Uobe K, Tanaka A. Highly sensitive detection of HPV-DNA in paraffin sections of human oral carcinomas. J Oral Pathol Med 2007; 36:18-24. [PMID: 17181737 DOI: 10.1111/j.1600-0714.2006.00490.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Although human papillomavirus (HPV) infection has been shown to be a significant carcinogen in cervical squamous cell carcinoma (SCC), its significance in oral SCC remains unclear. METHODS We developed highly sensitive detection methods for HPV to elucidate the prevalence and localization of HPV in paraffin sections from human oral SCC using modified in situ polymerase chain reaction (PCR) and in situ hybridization AT tailing (ISH-AT). Analyses revealed a high prevalence of several HPV types (HPV-16, -18, -22, -38 and -70) under optimal conditions. The ISH-AT method can be used as an alternative to in situ PCR. RESULTS Various staining patterns were observed in the 20 cases examined, and HPV-positive cells were localized within the surface epithelium as well as in neoplastic cells. We demonstrated that HPV-DNA could be detected in paraffin sections using either the method of in situ PCR or ISH, providing an appropriate primer and probe are used. CONCLUSION These results suggest that HPV infection could be one of several risk factors being involved in oral SCC.
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Affiliation(s)
- Koichi Koyama
- Department of Oral Pathology, Osaka Dental University, Hirakata, Osaka, Japan
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36
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Sugiyama M, Bhawal UK, Kawamura M, Ishioka Y, Shigeishi H, Higashikawa K, Kamata N. Human papillomavirus-16 in oral squamous cell carcinoma: Clinical correlates and 5-year survival. Br J Oral Maxillofac Surg 2007; 45:116-22. [PMID: 16781026 DOI: 10.1016/j.bjoms.2006.04.012] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2006] [Indexed: 11/22/2022]
Abstract
We examined 66 oral squamous cell carcinomas (OSCCs) for human papillomavirus-16 (HPV-16) infection to evaluate its prognostic significance. Cox regression analysis of 5-year survival demonstrated that patients without nodal metastasis or with intratumoural HPV-16 showed better prognoses compared with each counterpart. In Kaplan-Meier survival analysis, nodal status but not HPV-16 status was statistically significant. The 5-year survival rate of HPV-16 positive patients without nodal metastasis (94%) was extremely high, compared with that of HPV-16 negative patients with nodal metastasis (25%). These results suggest that HPV-16 status as well as nodal status may provide prognostic significance in patients with OSCC.
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Affiliation(s)
- Masaru Sugiyama
- Department of Oral Health Research, School for Oral Health Science, Hiroshima University Faculty of Dentistry, Japan.
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37
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Ragin CCR, Modugno F, Gollin SM. The epidemiology and risk factors of head and neck cancer: a focus on human papillomavirus. J Dent Res 2007; 86:104-14. [PMID: 17251508 DOI: 10.1177/154405910708600202] [Citation(s) in RCA: 241] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Head and neck cancer was the eighth leading cause of cancer death worldwide in 2000. Although the incidence of head and neck squamous cell carcinoma (HNSCC) in the United States is relatively low, survival is poor and has not improved for several decades. While tobacco and alcohol are the primary risk factors for HNSCC development, epidemiological studies report a strong association with human papillomavirus (HPV) in a subset of HNSCC. More than 95% of cervical squamous cell carcinomas are linked to persistent HPV infection; evidence demonstrates that HPV is a necessary carcinogen. Not all HPV-positive HNSCC express the viral oncogenes (E6 and E7), which suggests that HPV may function as a carcinogen in a smaller proportion of HNSCC. This review presents our current understanding of the relationship between HPV and HNSCC, and describes future research directions that may lead to a better understanding of the involvement of HPV in head and neck cancer.
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Affiliation(s)
- C C R Ragin
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA 15261, USA.
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38
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Rose B, Wilkins D, Li W, Tran N, Thompson C, Cossart Y, McGeechan K, O'Brien C, Eris J. Human Papillomavirus in the Oral Cavity of Patients with and without Renal Transplantation. Transplantation 2006; 82:570-3. [PMID: 16926603 DOI: 10.1097/01.tp.0000231706.79165.e5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
This study investigates human papillomavirus (HPV) infection in the oral cavities of 88 Australian renal transplant recipients and 88 immunocompetent controls. Oral cavities were examined for lesions and brushings collected for HPV analysis by consensus PCR. No warts were identified; HPV DNA was detected in 18% of transplant versus 1% control samples (P<0.001). Cutaneous HPVs predominated. One patient had HPV16 in samples taken four years apart without evidence of associated lesions or malignancy. Transplant recipients were more likely than controls to have current cutaneous warts (P<0.001), fewer sexual partners (P=0.001), and to have never consumed alcohol (P=0.01). Among the transplant group, the risk of an HPV-positive sample was higher among older patients (P=0.05), and those with past cutaneous warts (P=0.04). This study extends previous surveys by encompassing overt and asymptomatic infection, a broad spectrum of cutaneous and genital HPVs, and by providing new data on risk factors for oral HPV infection.
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Affiliation(s)
- Barbara Rose
- Sydney Head & Neck Cancer Institute and Sydney Cancer Centre, Royal Prince Alfred Hospital, Sydney, Australia.
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39
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Boy S, Van Rensburg EJV, Engelbrecht S, Dreyer L, van Heerden M, van Heerden W. HPV detection in primary intra-oral squamous cell carcinomas--commensal, aetiological agent or contamination? J Oral Pathol Med 2006; 35:86-90. [PMID: 16430738 DOI: 10.1111/j.1600-0714.2006.00385.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND High-risk human papilloma viruses (HPV) are reported to be significant independent risk factors for oral squamous cell carcinoma (OSCC). The prevalence of HPV in OSCC in a South African population sample was evaluated comparing three different HPV detection methods. METHODS Tumour and adjacent morphologically normal oral mucosa of 59 resections of primary OSCC were evaluated for the presence of HPV using real-time polymerase chain reaction (PCR), conventional in situ hybridization (ISH), and a signal amplification ISH technique (Dako GenPoint). RESULTS HPV18 DNA was detected in seven cases using real-time PCR. No positivity was found with the other two ISH techniques. CONCLUSIONS We support the view that HPV is probably unimportant in the pathogenesis of OSCC and hypothesize HPV detection techniques as the main reason for the positive results in many studies. Real-time PCR was confirmed as the most sensitive technique, but researchers are urged to incorporate strict internal controls when using this detection method.
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Affiliation(s)
- Sonja Boy
- Department of Oral Pathology and Oral Biology, University of Pretoria, Pretoria, South Africa.
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40
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Giraldo P, Gonçalves AKS, Pereira SAS, Barros-Mazon S, Gondo ML, Witkin SS. Human papillomavirus in the oral mucosa of women with genital human papillomavirus lesions. Eur J Obstet Gynecol Reprod Biol 2006; 126:104-6. [PMID: 16324781 DOI: 10.1016/j.ejogrb.2005.09.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2004] [Revised: 06/30/2005] [Accepted: 09/21/2005] [Indexed: 10/25/2022]
Abstract
OBJECTIVES Human papillomavirus (HPV) infection is one of the most common sexually transmitted diseases worldwide. We determined the frequency of HPV in the oral cavity of women with and without genital HPV lesions. MATERIAL AND METHODS All patients were seen at the Department of Gynecology, Women's Health Center and the State University of Campinas, Sao Paulo, Brazil and submitted to a general physical and gynecological examination plus an evaluation of the oral cavity. Detailed histories investigated their sexual practices. HPV in the oral cavity was determined by polymerase chain reaction using consensus primers in 70 women presenting with histopathology-confirmed clinical HPV lesions in the genital region and 70 women negative by gynecological, colposcopic and cytological examination for clinical or subclinical HPV lesions. RESULTS Oral HPV was detected in 29 (20.7%) of the subjects. Among the positive women, 26 (89.7%) were also positive for genital HPV as opposed to only 3 (2.7%) who were genital HPV-negative (p < 0.0001). The overall prevalence of HPV in the oral cavity of patients with and without genital HPV was 37.1 and 4.3%, respectively, (p < 0.0001). The presence of oral HPV was unrelated to the practice of fellatio (22% versus 19%). CONCLUSION Patients with HPV genital infection have a greater frequency of HPV in their oral mucosa.
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Affiliation(s)
- Paulo Giraldo
- Department of Gynecology and Obstetrics, Department of Clinical Pathology, The State University of Campinas, School of Medical Sciences, CEP 13092-160 Campinas, São Paulo, Brazil.
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41
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Castro TPPG, Bussoloti Filho I. Prevalência do papilomavírus humano (HPV) na cavidade oral e na orofaringe. ACTA ACUST UNITED AC 2006. [DOI: 10.1590/s0034-72992006000200021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A prevalência do papilomavírus humano (HPV) na cavidade oral e na orofaringe ainda não está bem esclarecida como nos estudos do trato genital, na qual é bem definida. Entretanto, novas pesquisas estão surgindo após o aparecimento dos exames de biologia molecular. Neste estudo foi realizada uma revisão da literatura com o objetivo de verificar a prevalência do papilomavírus humano na cavidade oral e na orofaringe. Os resultados desta pesquisa mostraram uma prevalência do HPV 16 na mucosa oral normal (infecção latente). Já nas lesões benignas orais associadas ao HPV mostraram uma prevalência do HPV 6 e 11 em papilomas de células escamosas e condilomas, e, nas verrugas, uma prevalência do HPV 2 e 57, enquanto na hiperplasia epitelial focal prevaleceram os HPVs 13 e 32, e no câncer oral, principalmente, no carcinoma de células escamosas (CCE), foi evidenciada uma alta prevalência do HPV 16, o que sugere sua participação na carcinogênese oral, apesar de ser um assunto controverso. Constatou-se também uma enorme discrepância nos resultados da prevalência do papilomavírus humano (HPV) na mucosa oral normal (infecção latente) e no câncer oral, enquanto nas lesões benignas associadas ao vírus, os resultados foram confirmatórios.
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42
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Castro TPPG, Filho IB. Prevalence of human papillomavirus (HPV) in oral cavity and oropharynx. Braz J Otorhinolaryngol 2006; 72:272-82. [PMID: 16951865 PMCID: PMC9445676 DOI: 10.1016/s1808-8694(15)30068-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2005] [Accepted: 09/14/2005] [Indexed: 11/23/2022] Open
Abstract
The prevalence of human papillomavirus (HPV) in the oral cavity and oropharynx has not yet been as well studied as its infection of the vaginal tract. However, new study are emerge after the development of molecular biology techniques. The objective of this study is to show the prevalence of HPV in the oral cavity and the oropharynx. An ample bibliographic review was done showing a prevalence of HPV 6, 11 in a normal oral mucous membrane (latent infection). In oral benign lesions associated with HPV, a prevalence of HPV 6 and 11 was observed in squamous cell papilloma (SCP) and condylomas acuminatum, while HPV 2 and 57 were more prevalent in verruca vulgaris lesions. As for focal epithelial hyperplasia (FEH) and oral cancer, especially squamous cell carcinoma (SCC), the prevalence was of HPV 13 and 32, and HPV 16, respectively. The last findings are, nonetheless, controversial. The last findings are, nonetheless, controversial. Showed also discrepancy result the prevalence of human papillomavírus (HPV) in normal oral mucous (latent infection) and in oral cancer, however evidenced confirmatory result in oral benign lesions associated with virus.
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Affiliation(s)
- Therezita Peixoto Patury Galvão Castro
- Postgraduate student (PhD) - Department of Otorhinolaryngology - FCMSCSP, Assistant Professor of Otorhinolaryngology - UNCISAL and UFAL
- Mailing address: Av. Alvaro Otacílio 3031 ap. 402 Ponta Verde 570335180 Maceió AL. Fax: (0xx82) 241-0601
| | - Ivo Bussoloti Filho
- PhD in Medicine (Otorhinolaryngology), Professor of Otorhinolaryngology- FCMSCSP
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43
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Rinaggio J, Glick M, Lambert WC. Oral bowenoid papulosis in an HIV-positive male. ACTA ACUST UNITED AC 2006; 101:328-32. [PMID: 16504866 DOI: 10.1016/j.tripleo.2005.02.066] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2004] [Revised: 01/11/2005] [Accepted: 02/23/2005] [Indexed: 11/26/2022]
Abstract
Bowenoid papulosis (BP) is a condition triggered by human papillomavirus infection and characterized by the development of 1 or more warty lesions, usually in the anogenital region. Although the oral cavity has been known to host several types of warts, thus far only 4 cases of BP have been reported in this anatomic site. We describe a 42-year-old male with AIDS who presented with numerous papillary lesions of the labial mucosa and vermilion. Biopsy yielded a diagnosis of BP. Treatment of the condition consisted of intralesional and subcutaneous injections of interferon-alpha followed by topical application of imiquimod 5% cream. Neither regimen resulted in resolution of the lesions. To our knowledge, this represents the first case of BP arising in the oral mucosa of an HIV-infected individual.
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Affiliation(s)
- Joseph Rinaggio
- Department of Diagnostic Sciences, University of Medicine and Dentistry of New Jersey-New Jersey Dental School, Newark, NJ 07103-2400, USA.
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44
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Gonçalves AKS, Giraldo P, Barros-Mazon S, Gondo ML, Amaral RL, Jacyntho C. Secretory immunoglobulin A in saliva of women with oral and genital HPV infection. Eur J Obstet Gynecol Reprod Biol 2005; 124:227-31. [PMID: 16143445 DOI: 10.1016/j.ejogrb.2005.06.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2005] [Revised: 05/11/2005] [Accepted: 06/30/2005] [Indexed: 11/15/2022]
Abstract
UNLABELLED Secretory IgA contributes towards the protection of mucosal surfaces against invading microorganisms. OBJECTIVES Quantify secretory IgA titers in the saliva of women with HPV in the oropharynx and/or in the genital area. SUBJECTS AND METHODS Seventy women with clinical genital HPV lesions and 70 women without HPV infection were tested for oral HPV DNA and the levels of total IgA in their saliva. One millilitre of saliva was collected, centrifuged and stored at -80 degrees C for the measurement of secretory IgA by nephelometry technique. A pool of oral pharyngeal cells was collected for HPV identification by polymerase chain reaction. RESULTS Oral HPV PCR was positive in 29 (21%) women (26 women with genital HPV and only 3 women without genital HPV). Titers of secretory IgA were extremely lower in-patients with HPV DNA in the oropharynx when compared to HPV negative women (p<0.0001). Genital HPV and smoking were also associated to low levels of total sIgA in saliva (p<0.01). After multivariable analyses only the presence of HPV in the oral cavity and/or in genital area, but not smoking, was related to low levels of total secretory IgA. CONCLUSION Women with low levels of total secretory IgA could be more susceptible to having their oral mucosa colonized by HPV.
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45
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Abstract
The incidence of oral cancer amongst young adults is increasing in many European and high incidence countries. Most oral cancer is aetiologically linked to the use of tobacco and/or alcohol but nearly two decades ago, we produced the first evidence for the presence of viral nucleic acids in oral squamous cell carcinoma (OSCC) tissues, hypothesising that there may be a viral involvement in at least some OSCC. Subsequently, human papillomaviruses (HPV) in particular have been implicated in OSCC. Antibody responses to HPV are seen and HPV-DNA detected in tumours by us and many others, the virus being mainly HPV-16, the genotype associated with ano-genital cancer. Recent studies have indicated that HPV may be aetiologically important particularly in some types of oropharyngeal cancer, at least in tonsillar carcinogenesis, and may represent an alternative pathway in carcinogenesis to the established factors of tobacco and alcohol. Studies of patients with OSCC have suggested possible sexual transmission of HPV.
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Affiliation(s)
- C Scully
- Eastman Dental Institute for Oral Health Care Sciences, University of London, 256 Gray's Inn Road, London WC1X 8LD, UK
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Lin SS, Chou MY, Ho CC, Kao CT, Tsai CH, Wang L, Yang CC. Study of the viral infections and cytokines associated with recurrent aphthous ulceration. Microbes Infect 2005; 7:635-44. [PMID: 15840465 DOI: 10.1016/j.micinf.2004.12.023] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2004] [Revised: 12/24/2004] [Accepted: 12/28/2004] [Indexed: 11/29/2022]
Abstract
Mouth ulcers are one of the most common oral complaints. However, the association between oral ulceration and viruses and cytokines is uncertain. We detected the presence of human papilloma virus (HPV), cytomegalovirus (CMV), Epstein-Barr virus (EBV), herpes simplex virus (HSV)-1, HSV-2 and human herpesvirus (HHV)-8 DNA in oral tissues by polymerase chain reaction (PCR) and Southern hybridization techniques, and quantified the serum levels of cytokines including interleukin (IL)-2, IL-4, granulocyte-macrophage colony-stimulating factor (GM-CSF), soluble Fas (sFas) and the Fas ligand (FasL) by enzyme-linked immunosorbent assay (ELISA) for 67 recurrent aphthous ulcer (RAU) patients and 72 normal individuals. Seven patient specimens were excluded from the study due to the negative PCR results for the beta-globin used as the internal control. Among the 32 (53.3%) virus-positive results from 60 patients' samples, 8 (13.3%) HPV, 4 (6.7%) HSV-1, 11 (18.3%) CMV, 9 (15.0%) EBV, and 16 (26.7%) HHV-8 samples proved to be positive. No HSV-2-positive samples were found. The percentage of single-virus infection (56.3%) was significantly greater than that of double-virus co-infection (31.3%) and the percentage of double-virus co-infection was significantly greater than the percentage of triple-virus co-infection (12.5%) (P < 0.05). In the 72 normal oral-tissue specimens, no viral DNA was detected. The mean serum cytokine level for patients was significantly (P < 0.05) greater than for controls for most of the separate age groups. The mean serum cytokine concentrations for the patient group demonstrated a diffuse pattern covering a wide range of serum concentrations, a very different result from the compact serum concentration pattern and lower mean serum cytokine concentrations revealed by the normal group. Overall association between viruses and recurrent aphthous ulceration is HHV-8 > CMV > EBV > HPV > HSV-1, regarding the frequency of prevalence (P < 0.05).
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Affiliation(s)
- Shih-Shen Lin
- Department of Dentistry, Chung Shan Medical University Hospital, Taichung, Taiwan, ROC
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Campisi G, Giovannelli L, Aricò P, Lama A, Di Liberto C, Ammatuna P, D'Angelo M. HPV DNA in clinically different variants of oral leukoplakia and lichen planus. ACTA ACUST UNITED AC 2004; 98:705-11. [PMID: 15583544 DOI: 10.1016/j.tripleo.2004.04.012] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVES Our objectives were to determine the prevalence of human papillomavirus (HPV) infection in oral leukoplakia (OL) and oral lichen planus (OLP) in comparison with that in healthy oral mucosa, also conditionally to age, gender, smoking, and drinking habits of patients, so as to investigate any possible association of HPV infection with a specific clinical variant of OL or OLP. STUDY DESIGN We did research on HPV DNA in 68 cases of OL (homogeneous form [H] in 45 cases and nonhomogeneous form [non-H] in 23 cases), and in 71 cases of OLP (nonatrophic/erosive form [non-AE] in 27 cases, atrophic/erosive form [AE] in 44 cases). HPV DNA was investigated in exfoliated oral mucosa cells by nested PCR (nPCR: MY09-MY11/GP5-GP6) and the HPV genotype determined by direct DNA sequencing. RESULTS HPV DNA was found in 17.6% of OL, in 19.7% of OLP, and in 5.6% of controls, with a statistically significant higher risk of HPV infection in both lesion groups (for OL: P=.01; Odds Ratio [OR]=3.64; 95% CI: 1.21-10.80; for OLP: P=.005; OR=4.17; 95% CI: 1.41-12.18). Demographic variables analysis showed that the only significant association was between HPV status and current smoking in OL patients (OR'=3.40; 95% CI: 1.0-11.59). HPV DNA was found in 20% of H OL and 13% of non-H OL, without any association with the clinical variant (P=.73; OR=0.60; 95% CI: 0.14-2.48). HPV DNA was found in 18.5% of non-AE OLP and 20.4% of AE OLP, without any significant association with the clinical variant (P=.84; OR=1.13; 95% CI: 0.335-3.816). HPV-18 was the most frequently detected genotype (9/12 and 10/14 of HPV-positive OL and OLP, respectively), followed by HPV-16 (2/12 OL and 2/14 OLP), HPV-33 (1/12 OL), HPV-31 (1/14 OLP), and HPV-6 (1/14 OLP). CONCLUSIONS An increased risk of HPV infection was found in OL and OLP; however, no specific clinical variant of OL or OLP was noted to be associated with HPV infection. It is not possible to predict the likelihood of HPV infection from the clinical features of OL and OLP.
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Affiliation(s)
- Giuseppina Campisi
- School of Dentistry, Pontifical University Catholic, Porto Alegre, Brazil.
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Kurose K, Terai M, Soedarsono N, Rabello D, Nakajima Y, Burk RD, Takagi M. Low prevalence of HPV infection and its natural history in normal oral mucosa among volunteers on Miyako Island, Japan. ACTA ACUST UNITED AC 2004; 98:91-6. [PMID: 15243477 DOI: 10.1016/j.tripleo.2003.12.029] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
OBJECTIVE To investigate the prevalence of human papillomavirus (HPV) infection in normal oral mucosa, and to observe the natural history in the oral cavity in oral swab samples collected from healthy volunteers on Miyako Island, Okinawa, Japan. STUDY DESIGN The prevalence of HPV infection in oral buccal mucosa cell scrapes collected between 2000 and 2002 from a cohort of 668 healthy volunteers was determined. HPV DNA was detected by consensus polymerase chain reaction (PCR) using MY09/MY11 primers followed by direct cycle sequencing. Just over 2 years later the HPV-positive participants were reevaluated. RESULTS Of the 668 subjects, 662 samples were analyzed for HPV. HPV DNA was detected in 4 (0.6%) specimens. HPV type 16 (HPV16), HPV53, and HPV71, mucosal types, and HPV12, a cutaneous type, were all identified by direct sequencing. In the follow-up survey, the HPV71- and HPV12-positive participants again tested positive, while HPV DNA was not detected in the HPV16- and HPV53-positive participants. CONCLUSION The results of this study among healthy individuals from Miyako Island suggest that oral HPV infection is uncommon. In this cohort, HPV71 and HPV12 were persistent, while HPV16 and HPV53 were transient in normal oral mucosa.
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Affiliation(s)
- Kazuyo Kurose
- Department of Oral Restitution, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
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Remmerbach TW, Brinckmann UG, Hemprich A, Chekol M, Kühndel K, Liebert UG. PCR detection of human papillomavirus of the mucosa: comparison between MY09/11 and GP5+/6+ primer sets. J Clin Virol 2004; 30:302-8. [PMID: 15163418 DOI: 10.1016/j.jcv.2003.12.011] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 11/26/2003] [Accepted: 12/31/2003] [Indexed: 10/26/2022]
Abstract
BACKGROUND AND OBJECTIVES Human papillomaviruses (HPV) are the causal agent for the development of carcinomas in the cervix uteri and further pathological changes of the skin including mucosa, particularly warts, condylomas and dysplasias. Therefore, we investigated the efficacy of different consensus primers pairs for HPV detection by PCR using brushed samples from the oral cavity in comparison with samples from the cervix uteri. STUDY DESIGN In the present study, we used two well-established sets of PCR primers in different combinations for the detection of HPV DNA in 106 non-invasive brush biopsy samples of the oral mucosa and 56 samples from the cervix uteri. Direct sequencing of PCR products in all cases determined HPV genotype and specificity. RESULTS Overall, HPV was detected in 69 of 106 oral mucosa samples. HPV specific amplicons were obtained in 35.8% (N = 38) when using GP5+/6+ primers. The positivity rate was increased to 65.1% in a GP5+/6+ auto-nested PCR approach. In contrast, MY9/11 PCR and nested PCR with MY9/11 outer followed by GP5+/6+ inner primers yielded 2.2% and 16.1%, respectively. In gynaecological samples, PCR results were similar independent of the primer combination used. Thus, DNA quality and DNA content could be additional factors influencing the rate of positivity. CONCLUSION For oral mucosa samples, auto-nested GP5+/6+ PCR is in our hands the most suitable approach for epidemiological studies because of its high sensitivity, high reliability and reproducibility as well as its relatively simple laboratory procedure.
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Affiliation(s)
- Torsten W Remmerbach
- Department of Oral, Maxillofacial and Facial Plastic Surgery, University of Leipzig, Leipzig, Germany
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Affiliation(s)
- Craig G Burkhart
- Brown University Medical Hospitals, Providence, Rhode Island, USA.
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