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Pasamba EC, Orda MA, Villanueva BHA, Tsai PW, Tayo LL. Transcriptomic Analysis of Hub Genes Reveals Associated Inflammatory Pathways in Estrogen-Dependent Gynecological Diseases. BIOLOGY 2024; 13:397. [PMID: 38927277 PMCID: PMC11201105 DOI: 10.3390/biology13060397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 05/26/2024] [Accepted: 05/27/2024] [Indexed: 06/28/2024]
Abstract
Gynecological diseases are triggered by aberrant molecular pathways that alter gene expression, hormonal balance, and cellular signaling pathways, which may lead to long-term physiological consequences. This study was able to identify highly preserved modules and key hub genes that are mainly associated with gynecological diseases, represented by endometriosis (EM), ovarian cancer (OC), cervical cancer (CC), and endometrial cancer (EC), through the weighted gene co-expression network analysis (WGCNA) of microarray datasets sourced from the Gene Expression Omnibus (GEO) database. Five highly preserved modules were observed across the EM (GSE51981), OC (GSE63885), CC (GSE63514), and EC (GSE17025) datasets. The functional annotation and pathway enrichment analysis revealed that the highly preserved modules were heavily involved in several inflammatory pathways that are associated with transcription dysregulation, such as NF-kB signaling, JAK-STAT signaling, MAPK-ERK signaling, and mTOR signaling pathways. Furthermore, the results also include pathways that are relevant in gynecological disease prognosis through viral infections. Mutations in the ESR1 gene that encodes for ERα, which were shown to also affect signaling pathways involved in inflammation, further indicate its importance in gynecological disease prognosis. Potential drugs were screened through the Drug Repurposing Encyclopedia (DRE) based on the up-and downregulated hub genes, wherein a bacterial ribosomal subunit inhibitor and a benzodiazepine receptor agonist were the top candidates. Other drug candidates include a dihydrofolate reductase inhibitor, glucocorticoid receptor agonists, cholinergic receptor agonists, selective serotonin reuptake inhibitors, sterol demethylase inhibitors, a bacterial antifolate, and serotonin receptor antagonist drugs which have known anti-inflammatory effects, demonstrating that the gene network highlights specific inflammatory pathways as a therapeutic avenue in designing drug candidates for gynecological diseases.
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Affiliation(s)
- Elaine C. Pasamba
- School of Graduate Studies, Mapúa University, Manila City 1002, Philippines; (E.C.P.); (M.A.O.); (B.H.A.V.)
- School of Chemical, Biological, and Materials Engineering and Sciences, Mapúa University, Manila City 1002, Philippines
| | - Marco A. Orda
- School of Graduate Studies, Mapúa University, Manila City 1002, Philippines; (E.C.P.); (M.A.O.); (B.H.A.V.)
- School of Chemical, Biological, and Materials Engineering and Sciences, Mapúa University, Manila City 1002, Philippines
| | - Brian Harvey Avanceña Villanueva
- School of Graduate Studies, Mapúa University, Manila City 1002, Philippines; (E.C.P.); (M.A.O.); (B.H.A.V.)
- School of Chemical, Biological, and Materials Engineering and Sciences, Mapúa University, Manila City 1002, Philippines
| | - Po-Wei Tsai
- Department of Food Science, National Taiwan Ocean University, Keelung 20224, Taiwan;
| | - Lemmuel L. Tayo
- School of Graduate Studies, Mapúa University, Manila City 1002, Philippines; (E.C.P.); (M.A.O.); (B.H.A.V.)
- School of Chemical, Biological, and Materials Engineering and Sciences, Mapúa University, Manila City 1002, Philippines
- Department of Biology, School of Health Sciences, Mapúa University, Makati City 1203, Philippines
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Sarwar S, Mulla M, Mulla M, Tanveer R, Sabir M, Sultan A, Malik SA. Human papillomavirus, tobacco, and poor oral hygiene can act synergetically, modulate the expression of the nuclear factor kappa B signaling pathway for the development and progression of head and neck cancer in the Pakistani population. Chin Med J (Engl) 2022; 135:1829-1836. [PMID: 35838554 PMCID: PMC9521783 DOI: 10.1097/cm9.0000000000001970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Head and neck cancers (HNCs) are a heterogeneous group of tumors that progress owing to varied enviromental and genetic risk factors. Viral infections are threatening and adept at altering the expression of cellular transcription factors such as nuclear factor kappa B (NF-κB) and deregulation of other cellular proteins like NF kappa B inhibitor alpha (IκBα). The present study was conducted to detect high-risk genotypes of human papillomavirus (HPV) and protein expression of NF-κB signaling pathway in HNC patients with HPV infection. METHODS For HPV detection, genomic DNA from 152 HNC tumors was extracted formalin-fixed paraffin-embedded tissue DNA kit. For genotyping, polymerase chain reaction (PCR) using a general primer, HPV type-specific primers and agarose gel electrophoresis were performed. Immunohistochemistry (IHC) was also performed on 4-μm thick tissue sections using HPV E6 monoclonal antibody. Protein expression analysis of NF-κB signaling pathway including p50, p65, and IκBα was performed using IHC. RESULTS PCR analysis showed that 24.3% (37/152) of HNC cases were HPV positive. Among HPV positive, 86.5% (32/37) were tobacco users, while among HPV negative, 66.9% (77/115) were tobacco users. A significant association of HPV positivity and tobacco user was observed by univariate analysis [ P < 0.01; odds ratio (OR): 0.310, 95% confidence interval (CI): 0.110 to 0.870]. More HPV positive patients were with poor oral hygiene (78.3%) when compared with patients with good oral hygiene (21.6%) [ P < 0.03, OR: 2.440, 95% CI: 1.650 to 3.600]. The results of the logistic regression analysis showed that age, tobacco use and oral hygiene are significant predictors ( P < 0.02). PCR and IHC staining results confirmed that HPV16 was predominant among HNC cases (64.8%) when compared with HPV18 (35.2%). Expression of NF-κB proteins (p50, p65, and IκBα inhibitor) were also observed in HPV and non-HPV infected HNC tissues. IHC expression of p50, and p65 showed nuclear staining, while IκBα inhibitor showed cytoplasmic staining. Protein expression in HPV cases was higher as compared to HPV naive cases ( P < 0.05). CONCLUSIONS From the study, it can be established that the use of tobacco, oral hygiene, and HPV infection may be synergistically involved in modulating the expression of NF-κB signaling pathway for the development and progression of HNC in the Pakistani population.
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Affiliation(s)
- Sumaira Sarwar
- Department of Biochemistry, Qauid-i-Azam University, Islamabad 45320, Pakistan
| | - Mushir Mulla
- Department of Oral and Dental health, College of Applied Health Sciences in Arrass, Qassim University, Buraidah, Al Qasim 51921, Saudi Arabia
| | - Munaz Mulla
- Department of Periodontology and Oral medicine, College of Dentistry, Qassim University, Buraidah, Al Qasim 51921, Saudi Arabia
| | - Rida Tanveer
- Department of Biochemistry, Qauid-i-Azam University, Islamabad 45320, Pakistan
| | - Maimoona Sabir
- Department of Microbiology, The University of Haripur, Haripur, KP 22620, Pakistan
| | - Aneesa Sultan
- Department of Biochemistry, Qauid-i-Azam University, Islamabad 45320, Pakistan
| | - Salman A. Malik
- Department of Biochemistry, Qauid-i-Azam University, Islamabad 45320, Pakistan
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Rafael TS, Rotman J, Brouwer OR, van der Poel HG, Mom CH, Kenter GG, de Gruijl TD, Jordanova ES. Immunotherapeutic Approaches for the Treatment of HPV-Associated (Pre-)Cancer of the Cervix, Vulva and Penis. J Clin Med 2022; 11:1101. [PMID: 35207374 PMCID: PMC8876514 DOI: 10.3390/jcm11041101] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/15/2022] [Accepted: 02/17/2022] [Indexed: 02/07/2023] Open
Abstract
Human papillomavirus (HPV) infection drives tumorigenesis in almost all cervical cancers and a fraction of vulvar and penile cancers. Due to increasing incidence and low vaccination rates, many will still have to face HPV-related morbidity and mortality in the upcoming years. Current treatment options (i.e., surgery and/or chemoradiation) for urogenital (pre-)malignancies can have profound psychosocial and psychosexual effects on patients. Moreover, in the setting of advanced disease, responses to current therapies remain poor and nondurable, highlighting the unmet need for novel therapies that prevent recurrent disease and improve clinical outcome. Immunotherapy can be a useful addition to the current therapeutic strategies in various settings of disease, offering relatively fewer adverse effects and potential improvement in survival. This review discusses immune evasion mechanisms accompanying HPV infection and HPV-related tumorigenesis and summarizes current immunotherapeutic approaches for the treatment of HPV-related (pre-)malignant lesions of the uterine cervix, vulva, and penis.
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Affiliation(s)
- Tynisha S. Rafael
- Department of Urology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands; (T.S.R.); (O.R.B.); (H.G.v.d.P.)
| | - Jossie Rotman
- Department of Obstetrics and Gynecology, Center for Gynecological Oncology Amsterdam (CGOA), Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands; (J.R.); (C.H.M.); (G.G.K.)
| | - Oscar R. Brouwer
- Department of Urology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands; (T.S.R.); (O.R.B.); (H.G.v.d.P.)
| | - Henk G. van der Poel
- Department of Urology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands; (T.S.R.); (O.R.B.); (H.G.v.d.P.)
| | - Constantijne H. Mom
- Department of Obstetrics and Gynecology, Center for Gynecological Oncology Amsterdam (CGOA), Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands; (J.R.); (C.H.M.); (G.G.K.)
| | - Gemma G. Kenter
- Department of Obstetrics and Gynecology, Center for Gynecological Oncology Amsterdam (CGOA), Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands; (J.R.); (C.H.M.); (G.G.K.)
| | - Tanja D. de Gruijl
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands;
| | - Ekaterina S. Jordanova
- Department of Urology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands; (T.S.R.); (O.R.B.); (H.G.v.d.P.)
- Department of Obstetrics and Gynecology, Center for Gynecological Oncology Amsterdam (CGOA), Amsterdam UMC, Vrije Universiteit Amsterdam, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands; (J.R.); (C.H.M.); (G.G.K.)
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Vanajothi R, Srikanth N, Vijayakumar R, Palanisamy M, Bhavaniramya S, Premkumar K. HPV-mediated Cervical Cancer: A Systematic review on Immunological Basis, Molecular Biology and Immune evasion mechanisms. Curr Drug Targets 2021; 23:782-801. [PMID: 34939539 DOI: 10.2174/1389450123666211221160632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 07/26/2021] [Accepted: 07/28/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Human papillomavirus (HPV), one of the most frequently transmitted viruses globally, causing several malignancies including cervical cancer. AIM Owing to their unique pathogenicity HPV viruses can persist in the host organism for a longer duration than other virus types, to complete their lifecycle. During its association with the host, HPV causes various pathological conditions affecting the immune system by evading the host immune- mechanisms leading to the progression of various diseases, including cancer. METHOD To date, ~ 150 serotypes were identified, and certain high-risk HPV types are known to be associated with genital warts and cervical cancer. As of now, two prophylactic vaccines are in use for the treatment of HPV infection, however, no effective antiviral drug is available for HPV-associated disease/infections. Numerous clinical and laboratory studies are being investigated to formulate an effective and specific vaccine again HPV infections and associated diseases. RESULT As the immunological basis of HPV infection and associated disease progress persist indistinctly, deeper insights on immune evasion mechanism and molecular biology of disease would aid in developing an effective vaccine. CONCLUSION Thus this review focuses, aiming a systematic review on the immunological aspects of HPV-associated cervical cancer by uncovering immune evasion strategies adapted by HPV.
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Affiliation(s)
- Ramar Vanajothi
- Department of Biomedical Science, Bharathidasan University, Tiruchirappalli-620024. India
| | - Natarajan Srikanth
- Department of Integrative Biology, Vellore Institute of Technology, Vellore. India
| | - Rajendran Vijayakumar
- Department of Biology, College of Science in Zulfi, Majmaah University, Majmaah 11952. Saudi Arabia
| | - Manikandan Palanisamy
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Majmaah 11952. Saudi Arabia
| | - Sundaresan Bhavaniramya
- College of Food and Dairy Technology, Tamil Nadu Veterinary and Animal Sciences, University, Chennai-600052, Tamil Nadu. India
| | - Kumpati Premkumar
- Department of Biomedical Science, Bharathidasan University, Tiruchirappalli-620024. India
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Ivanovski O, Saidi S, Shabani B, Gurmeshevski S, Pejkov R, Komina S, Gavrilovska-Brazanov A. Penile cancer after a tick bite: A possible association. SAGE Open Med Case Rep 2021; 9:2050313X211036779. [PMID: 34377488 PMCID: PMC8323426 DOI: 10.1177/2050313x211036779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 07/12/2021] [Indexed: 11/18/2022] Open
Abstract
Penile cancer is a rare cancer in Western countries, but is more common in parts of the
developing world. Usually, it is associated with older uncircumcised men who have a
long-term phymotic preputium. Here, we report a case of penile cancer in a circumcised
patient, occurring 3 months after a tick bite on the head of the penis. To the best of our
knowledge, this is the first report that suggests a possible association between Lyme
disease and occurrence of “de novo” penile cancer. Further studies are needed to confirm
this hypothesis.
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Affiliation(s)
- Ognen Ivanovski
- University Clinic of Urology, Medical Faculty, University "SS Cyril and Methodius," Skopje, Macedonia
| | - Skender Saidi
- University Clinic of Urology, Medical Faculty, University "SS Cyril and Methodius," Skopje, Macedonia
| | - Bashkim Shabani
- University Clinic of Urology, Medical Faculty, University "SS Cyril and Methodius," Skopje, Macedonia
| | - Slobodan Gurmeshevski
- University Clinic of Urology, Medical Faculty, University "SS Cyril and Methodius," Skopje, Macedonia
| | - Risto Pejkov
- University Clinic of Urology, Medical Faculty, University "SS Cyril and Methodius," Skopje, Macedonia
| | - Selim Komina
- Institute of Pathology, University "SS Cyril and Methodius," Skopje, Macedonia
| | - Aleksandra Gavrilovska-Brazanov
- University Clinic for Traumatology, Orthopaedic Diseases, Anaesthesia, Reanimation, Intensive Care and Emergency Centre, Medical Faculty, University "SS Cyril and Methodius," Skopje, Macedonia
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Sarwar S, Tareen MU, Sabir M, Sultan A, Malik SA. NF-κB1 intronic region polymorphisms as risk factor for head and neck cancer in HPV-infected population from Pakistan. Curr Mol Med 2021; 22:74-82. [PMID: 33653249 DOI: 10.2174/1566524021666210302144344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 01/27/2021] [Accepted: 02/09/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Head and neck cancer (HNC) developed due to the number of risk factors, including infection of Human Papillomavirus (HPV). The genetic predisposition also plays an important role in deregulating the NF-κB pathway, and certain polymorphisms are reported to affect the pathway genes. OBJECTIVES The present study was conducted for the detection of HPV and polymorphisms in the NF-κB1 gene of HNC patients in the Pakistani population. METHODS Genomic DNA from HNC tumors samples were extracted using the Exgene SV DNA extraction Kit. Allele-specific PCR and direct sequencing were done for analysis of NF-κB1 SNPs, 94ins/del (rs28362491), rs1598858, and rs4648068. RESULTS The genotypes AG (36.2%/ 12%) of rs1598858, and AG (28.3%/ 12%) and GG (28.3%/ 22%) of rs4648068 were associated with significantly (p≤0.05) increased risk of head and neck cancer in studied population. Furthermore, among the HNC cases, genotypes AGrs1598858 (p≤0.014) and GGrs4648068 (p≤0.001) had increased risk of HPV related cancers. Tobacco use (OR-3.158442; [1.140, 8.754]), lymph nodes involvement (OR 4.05128; [1.854, 8.852]), and poorly differentiated tumors (OR 1.997155; [0.940, 4.245]) were positively associated with HPV induced cancers. CONCLUSION It was the first comprehensive study from Pakistan, to evaluate the polymorphic variants of NF-κB1. Genotypes AGrs4648068, GGrs4648068, and AGrs1598858 of NF-κB1 gene are associated with increased risk of head and neck cancers in the Pakistani population. It can be concluded that HPV infection, lymph nodes and tobacco use can act synergetic to each other and add up in modulating HNC when present together with intronic SNPs of NF-κB1 gene.
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Affiliation(s)
- Sumaira Sarwar
- Department of Biochemistry, Quaid-I-Azam University, Islamabad. Pakistan
| | | | - Maimoona Sabir
- Department of Microbiology, University of Haripur, KP. Pakistan
| | - Aneesa Sultan
- Department of Biochemistry, Quaid-I-Azam University, Islamabad. Pakistan
| | - Salman A Malik
- Department of Biochemistry, Quaid-I-Azam University, Islamabad. Pakistan
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Ahn S, Kim GJ, Do SI, Kim K, Lee H, Do IG, Kim DH, Chae SW, Ryu S, Sohn JH. High-sensitivity C-reactive Protein and Regression of Low-grade Squamous Intraepithelial Lesion: The Role of Low-grade Inflammation in Cervical Carcinogenesis. J Epidemiol 2021; 31:615-620. [PMID: 33536377 PMCID: PMC8593578 DOI: 10.2188/jea.je20200142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022] Open
Abstract
Background Inflammation is emerging as a potential mechanism of cervical carcinogenesis. However, few studies have investigated the association between host inflammatory status and the natural course of cervical precursor lesion. The aim of this study was to assess the probability of LSIL regression, associated with an inflammatory biomarker, high-sensitivity C-reactive protein (hs-CRP). Methods In a longitudinal cohort study, female participants were examined annually or biannually using cervical cytology between 2006 and 2015. Incident LSIL cases were included in the analysis, with regression defined as at least one consecutive normal cytologic result. A total of 520 women aged 22–64 years were followed up for LSIL regression. The multivariable-adjusted hazard ratios (HRs) for LSIL regression were estimated using a parametric proportional hazards model. Results During 827.5 person-years of follow-up, 486 out of 520 subjects (93.5%) showed LSIL regression. After adjusting several important potential confounders, a higher quartile of hs-CRP levels was significantly associated with a lower rate of regression (for quartile 4 vs quartile 1, inverse HR 1.33; 95% CI, 1.04–1.69; P for trend = 0.028). Conclusions The low rate of spontaneous regression recorded in women with higher hs-CRP lends support to the role of the perturbated host inflammatory status in cervical carcinogenesis, and suggests that hs-CRP level could help monitor LSIL.
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Affiliation(s)
- Sangjeong Ahn
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine
| | - Gi Jeong Kim
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine
| | - Sung-Im Do
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine
| | - Kyungeun Kim
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine
| | - Hyunjoo Lee
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine
| | - In-Gu Do
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine
| | - Dong-Hoon Kim
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine
| | - Seoung Wan Chae
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine
| | - Seungho Ryu
- Department of Occupational and Environmental Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine.,Center for Cohort Studies, Total Healthcare Center, Kangbuk Samsung Hospital, Sungkyunkwan University, School of Medicine.,Department of Clinical Research Design & Evaluation, SAIHST, Sungkyunkwan University
| | - Jin Hee Sohn
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine
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Jee B, Yadav R, Pankaj S, Shahi SK. Immunology of HPV-mediated cervical cancer: current understanding. Int Rev Immunol 2020; 40:359-378. [PMID: 32853049 DOI: 10.1080/08830185.2020.1811859] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Human papilloma virus (HPV) has emerged as a primary cause of cervical cancer worldwide. HPV is a relatively small (55 nm in diameter) and non-enveloped virus containing approximately 8 kb long double stranded circular DNA genome. To date, 228 genotypes of HPV have been identified. Although all HPV infections do not lead to the development of malignancy of cervix, only persistent infection of high-risk types of HPV (mainly with HPV16 and HPV18) results in the disease. In addition, the immunity of the patients also acts as a key determinant in the carcinogenesis. Since, no HPV type specific medication is available for the patient suffering with cervical cancer, hence, a deep understanding of the disease etiology may be vital for developing an effective strategy for its prevention and management. From the immunological perspectives, the entire mechanisms of disease progression still remain unclear despite continuous efforts. In the present review, the recent developments in immunology of HPV-mediated cervix carcinoma were discussed. At the end, the prevention of disease using HPV type specific recombinant vaccines was also highlighted.
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Affiliation(s)
- Babban Jee
- Department of Health Research, Ministry of Health and Family Welfare, Government of India, New Delhi, India
| | - Renu Yadav
- Department of Biotechnology, Acharya Nagarjuna University, Guntur, India
| | - Sangeeta Pankaj
- Department of Gynecological Oncology, Regional Cancer Centre, Indira Gandhi Institute of Medical Sciences, Patna, India
| | - Shivendra Kumar Shahi
- Department of Microbiology, Indira Gandhi Institute of Medical Sciences, Patna, India
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Hemmat N, Bannazadeh Baghi H. Association of human papillomavirus infection and inflammation in cervical cancer. Pathog Dis 2020; 77:5558235. [PMID: 31504464 DOI: 10.1093/femspd/ftz048] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 09/01/2019] [Indexed: 12/11/2022] Open
Abstract
Human papillomavirus (HPV) associated cancers, and in particular cervical cancer, are considered to be directly stimulated by HPV oncogenes. Alternatively, these types of cancers could also be indirectly stimulated by HPV-induced chronic inflammations, which in turn are also caused by HPV oncogenes activity. Chronic inflammation is associated with repeated tissue injury and development of mutations in the vital tumor suppressor genes. Thus, it is important to understand that the persistent HPV infection and its associated chronic inflammation is responsible for the progression of HPV-induced cancers. HPV E5, E6 and E7 could upregulate the expression of cyclooxygenase (COX)-2 and prostaglandin (PG) E2 followed by the activation of the COX-PG pathway. This pathway is assumed to be the main cause of HPV-induced inflammation. Additionally, HPV oncogenes could have an impact on the upregulation of pro-inflammatory cytokines in HPV-positive patients. The upregulation of such cytokines accelerates the incidence of inflammation following HPV infection. Other factors such as microRNAs, which are involved in the inflammation pathways and aging, give rise to the increased level of pro-inflammatory cytokines and could also be responsible for the acceleration of HPV-induced inflammation and consequent cervical cancer. In this review, the exact roles of HPV oncogenes in the occurrence of inflammation in cervical tissue, and the effects of other factors in this event are evaluated.
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Affiliation(s)
- Nima Hemmat
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Drug Applied Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hossein Bannazadeh Baghi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Virology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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Ferreira AR, Ramalho AC, Marques M, Ribeiro D. The Interplay between Antiviral Signalling and Carcinogenesis in Human Papillomavirus Infections. Cancers (Basel) 2020; 12:cancers12030646. [PMID: 32164347 PMCID: PMC7139948 DOI: 10.3390/cancers12030646] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/05/2020] [Accepted: 03/06/2020] [Indexed: 12/20/2022] Open
Abstract
Human papillomaviruses (HPV) are the causative agents of the most common sexually transmitted infection worldwide. While infection is generally asymptomatic and can be cleared by the host immune system, when persistence occurs, HPV can become a risk factor for malignant transformation. Progression to cancer is actually an unintended consequence of the complex HPV life cycle. Different antiviral defence mechanisms recognize HPV early in infection, leading to the activation of the innate immune response. However, the virus has evolved several specific strategies to efficiently evade the antiviral immune signalling. Here, we review and discuss the interplay between HPV and the host cell innate immunity. We further highlight the evasion strategies developed by different HPV to escape this cellular response and focus on the correlation with HPV-induced persistence and tumorigenesis.
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Affiliation(s)
| | | | | | - Daniela Ribeiro
- Correspondence: ; Tel.: +351-234-247 014; Fax: +351-234-372-587
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Macharia LW, Mureithi MW, Anzala O. Cancer in Kenya: types and infection-attributable. Data from the adult population of two National referral hospitals (2008-2012). AAS Open Res 2019; 1:25. [PMID: 32382698 PMCID: PMC7185250 DOI: 10.12688/aasopenres.12910.5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/04/2019] [Indexed: 12/16/2022] Open
Abstract
Background: Cancer in Africa is an emerging health problem. In Kenya it ranks third as a cause of death after infectious and cardiovascular diseases. Nearly 31% of the total cancer burden in sub-Saharan Africa is attributable to infectious agents. Information on cancer burden is scanty in Kenya and this study aimed to provide comprehensive hospital based data to inform policies. Method: A cross-sectional retrospective survey was conducted at Kenyatta National Hospital (KNH) and Moi Teaching and Referral Hospital (MTRH) from January 2008 to December 2012. Data was obtained from the patients files and the study was approved by the KNH/University of Nairobi and MTRH Ethics and Research Committees. Results: In KNH, the top five cancers were: cervical (62, 12.4%), breast (59, 11.8%), colorectal (31, 6.2%), chronic leukemia (27, 5.4%) and stomach cancer (26, 5.2%). Some 154 (30.8%) of these cancers were associated with infectious agents, while an estimated 138 (27.6%) were attributable to infections. Cancers of the cervix (62, 12.4%), stomach (26, 5.2%) and nasopharynx (17, 3.4%) were the commonest infection-associated cancers. In MTRH, the five common types of cancers were Kaposi's sarcoma (93, 18.6%), breast (77, 15.4%), cervical (41, 8.2%), non-Hodgkin's lymphoma (37, 7.4%) and colorectal, chronic leukemia and esophageal cancer all with 27 (5.4%). Some 241 (48.2%) of these cancers were associated with infectious agents, while an estimated 222 (44.4%) were attributable to infections. Kaposi's sarcoma (93, 18.6%), cancer of the cervix (41, 8.2%) and non-Hodgkin's lymphoma (37, 7.4%) were the commonest infection-associated cancers. Conclusion: Our results suggest that 30.8% and 48.2% of the total cancer cases sampled in KNH and MTRH respectively were associated with infectious agents, while 27.6% and 44.4% were attributable to infections in the two hospitals respectively. Reducing the burden of infection-attributable cancers can translate to a reduction of the overall cancer burden.
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Affiliation(s)
- Lucy Wanjiku Macharia
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
| | - Marianne Wanjiru Mureithi
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
- KAVI-Institute of Clinical Research (KAVI-ICR), College of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Omu Anzala
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
- KAVI-Institute of Clinical Research (KAVI-ICR), College of Health Sciences, University of Nairobi, Nairobi, Kenya
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Macharia LW, Mureithi MW, Anzala O. Cancer in Kenya: types and infection-attributable. Data from the adult population of two National referral hospitals (2008-2012). AAS Open Res 2019; 1:25. [PMID: 32382698 PMCID: PMC7185250 DOI: 10.12688/aasopenres.12910.4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2019] [Indexed: 11/14/2023] Open
Abstract
Background: Cancer in Africa is an emerging health problem. In Kenya it ranks third as a cause of death after infectious and cardiovascular diseases. Nearly 31% of the total cancer burden in sub-Saharan Africa is attributable to infectious agents. Information on cancer burden is scanty in Kenya and this study aimed to provide comprehensive hospital based data to inform policies. Method: A cross-sectional retrospective survey was conducted at Kenyatta National Hospital (KNH) and Moi Teaching and Referral Hospital (MTRH) from January 2008 to December 2012. Data was obtained from the patients files and the study was approved by the KNH/University of Nairobi and MTRH Ethics and Research Committees. Results: In KNH, the top five cancers were: cervical (62, 12.4%), breast (59, 11.8%), colorectal (31, 6.2%), chronic leukemia (27, 5.4%) and stomach cancer 26 (5.2%). Some 154 (30.8%) of these cancers were associated with infectious agents, while an estimated 138 (27.6%) were attributable to infections. Cancers of the cervix (62, 12.4%), stomach (26, 5.2%) and nasopharynx (17, 3.4%) were the commonest infection-associated cancers. In MTRH, the five common types of cancers were Kaposi's sarcoma (93, 18.6%), breast (77, 15.4%), cervical (41, 8.2%), non-Hodgkin's lymphoma (37, 7.4%) and colorectal, chronic leukemia and esophageal cancer all with 27 (5.4%). Some 241 (48.2%) of these cancers were associated with infectious agents, while an estimated 222 (44.4%) were attributable to infections. Kaposi's sarcoma (93, 18.6%), cancer of the cervix (41, 8.2%) and non-Hodgkin's lymphoma (37, 7.4%) were the commonest infection-associated cancers. Conclusion: Our results suggest that 30.8% and 48.2% of the total cancer cases sampled in KNH and MTRH respectively were associated with infectious agents, while 27.6% and 44.4% were attributable to infections in the two hospitals respectively. Reducing the burden of infection-attributable cancers can translate to a reduction of the overall cancer burden.
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Affiliation(s)
- Lucy Wanjiku Macharia
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
| | - Marianne Wanjiru Mureithi
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
- KAVI-Institute of Clinical Research (KAVI-ICR), College of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Omu Anzala
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
- KAVI-Institute of Clinical Research (KAVI-ICR), College of Health Sciences, University of Nairobi, Nairobi, Kenya
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Macharia LW, Mureithi MW, Anzala O. Cancer in Kenya: types and infection-attributable. Data from two National referral hospitals. AAS Open Res 2019; 1:25. [PMID: 32382698 PMCID: PMC7185250 DOI: 10.12688/aasopenres.12910.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2019] [Indexed: 11/14/2023] Open
Abstract
Background: Cancer in Africa is an emerging health problem. In Kenya it ranks third as a cause of death after infectious and cardiovascular diseases. Nearly 31% of the total cancer burden in sub-Saharan Africa is attributable to infectious agents. Information on cancer burden is scanty in Kenya and this study aimed to provide comprehensive hospital based data to inform policies. Method: A cross-sectional retrospective survey was conducted at Kenyatta National Hospital (KNH) and Moi Teaching and Referral Hospital (MTRH) from 2008 to 2012. Data was obtained from the patients files and the study was approved by the KNH/University of Nairobi and MTRH Ethics and Research Committees. Results: In KNH, the top five cancers were: cervical (62, 12.4%), breast (59, 11.8%), colorectal (31, 6.2%), chronic leukemia (27, 5.4%) and stomach cancer 26 (5.2%). Some 154 (30.8%) of these cancers were associated with infectious agents, while an estimated 138 (27.6%) were attributable to infections. Cancers of the cervix (62, 12.4%), stomach (26, 5.2%) and nasopharynx (17, 3.4%) were the commonest infection-associated cancers. In MTRH, the five common types of cancers were Kaposi's sarcoma (93, 18.6%), breast (77, 15.4%), cervical (41, 8.2%), non-Hodgkin's lymphoma (37, 7.4%) and colorectal, chronic leukemia and esophageal cancer all with 27 (5.4%). Some 241 (48.2%) of these cancers were associated with infectious agents, while an estimated 222 (44.4%) were attributable to infections. Kaposi's sarcoma (93, 18.6%), cancer of the cervix (41, 8.2%) and non-Hodgkin's lymphoma (37, 7.4%) were the commonest infection-associated cancers. Conclusion: Our results suggest that 30.8% and 48.2% of the total cancer cases sampled in KNH and MTRH respectively were associated with infectious agents, while 27.6% and 44.4% were attributable to infections in the two hospitals respectively. Reducing the burden of infection-attributable cancers can translate to a reduction of the overall cancer burden.
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Affiliation(s)
- Lucy Wanjiku Macharia
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
| | - Marianne Wanjiru Mureithi
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
- KAVI-Institute of Clinical Research (KAVI-ICR), College of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Omu Anzala
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
- KAVI-Institute of Clinical Research (KAVI-ICR), College of Health Sciences, University of Nairobi, Nairobi, Kenya
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Macharia LW, Mureithi MW, Anzala O. Burden of cancer in Kenya: types, infection-attributable and trends. A national referral hospital retrospective survey. AAS Open Res 2018; 1:25. [PMID: 32382698 PMCID: PMC7185250 DOI: 10.12688/aasopenres.12910.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2018] [Indexed: 11/14/2023] Open
Abstract
Background: Cancer in Africa is an emerging health problem. In Kenya it ranks third as a cause of death after infectious and cardiovascular diseases. Nearly 31% of the total cancer burden in sub-Saharan Africa is attributable to infectious agents. Information on cancer burden is scanty in Kenya and this study aimed to provide comprehensive hospital based data to inform policies. Method: A cross-sectional retrospective survey was conducted at Kenyatta National Hospital (KNH) and Moi Teaching and Referral Hospital (MTRH) from 2008 to 2012. Data was obtained from the patients files and the study was approved by the KNH/University of Nairobi and MTRH Ethics and Research Committees. Results: In KNH, the top five cancers were: cervical (62, 12.4%), breast (59, 11.8%), colorectal (31, 6.2%), chronic leukemia (27, 5.4%) and stomach cancer 26 (5.2%). Some 154 (30.8%) of these cancers were associated with infectious agents, while an estimated 138 (27.6%) were attributable to infections. Cancers of the cervix (62, 12.4%), stomach (26, 5.2%) and nasopharynx (17, 3.4%) were the commonest infection-associated cancers. In MTRH, the five common types of cancers were Kaposi's sarcoma (93, 18.6%), breast (77, 15.4%), cervical (41, 8.2%), non-Hodgkin's lymphoma (37, 7.4%) and colorectal, chronic leukemia and esophageal cancer all with 27 (5.4%). Some 241 (48.2%) of these cancers were associated with infectious agents, while an estimated 222 (44.4%) were attributable to infections. Kaposi's sarcoma (93, 18.6%), cancer of the cervix (41, 8.2%) and non-Hodgkin's lymphoma (37, 7.4%) were the commonest infection-associated cancers. Conclusion: Our results suggest that 30.8% and 48.2% of the total cancer cases sampled in KNH and MTRH respectively were associated with infectious agents, while 27.6% and 44.4% were attributable to infections in the two hospitals respectively. Reducing the burden of infection-attributable cancers can translate to a reduction of the overall cancer burden.
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Affiliation(s)
- Lucy Wanjiku Macharia
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
| | - Marianne Wanjiru Mureithi
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
- KAVI-Institute of Clinical Research (KAVI-ICR), College of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Omu Anzala
- Department of medical Microbiology, Faculty of Medicine, University of Nairobi, Nairobi, Kenya
- KAVI-Institute of Clinical Research (KAVI-ICR), College of Health Sciences, University of Nairobi, Nairobi, Kenya
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Shi HJ, Song H, Zhao QY, Tao CX, Liu M, Zhu QQ. Efficacy and safety of combined high-dose interferon and red light therapy for the treatment of human papillomavirus and associated vaginitis and cervicitis: A prospective and randomized clinical study. Medicine (Baltimore) 2018; 97:e12398. [PMID: 30213012 PMCID: PMC6156011 DOI: 10.1097/md.0000000000012398] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 08/24/2018] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND We evaluated the efficacy and safety of combined high-dose interferon (IFN) and red light therapy for the treatment of subclinical and latent human papillomavirus (HPV) infections. METHODS Ninety women diagnosed with subclinical or latent HPV infection were randomized to receive topical application of low-dose recombinant IFNα-2b (1 million IU), high-dose IFNα-2b (9 million IU), or a combination of high-dose IFNα-2b and red light therapy on the cervix and vagina. All patients received treatment once daily for 4 weeks. HPV titer was measured immediately and 4, 8, and 12 weeks after treatment to determine the rates of viral clearance and infection cure. Treatment of HPV-associated vaginitis and cervicitis was also evaluated. RESULTS Results showed that immediately and 4, 8, and 12 weeks after treatment, the HPV clearance rates and infection cure rates were higher in the high-dose IFN and combination groups compared to the low-dose IFN group. High-dose IFN and combination therapies were significantly effective against both low-risk and high-risk HPV infections. Although the cure rates for vaginitis and cervicitis were significantly higher in the high- compared to the low-dose IFN group, rates were even higher in the combination group compared to the high-dose IFN group. Mild adverse effects were reported by a very small subset of patients (3/30) in the combination group. CONCLUSIONS This study suggests that combination of high-dose IFN and red light therapy is safe and effective against subclinical and latent HPV infections.
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Affiliation(s)
- Hui-Juan Shi
- Department of Dermatovenereology, Ningxia Medical University General Hospital, Yinchuan
| | - Hongbin Song
- Department of Dermatology, Chinese PLA General Hospital, Beijing
| | - Qian-Ying Zhao
- Medical Experimental Center, Ningxia Medical University General Hospital
| | - Chun-Xia Tao
- Department of Dermatovenereology, Ningxia Yangguang Hospital, Yinchuan, China
| | - Min Liu
- Department of Dermatovenereology, Ningxia Medical University General Hospital, Yinchuan
| | - Qin-Qin Zhu
- Department of Dermatovenereology, Ningxia Yangguang Hospital, Yinchuan, China
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Steinbach A, Riemer AB. Immune evasion mechanisms of human papillomavirus: An update. Int J Cancer 2017; 142:224-229. [PMID: 28865151 DOI: 10.1002/ijc.31027] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 08/04/2017] [Indexed: 12/16/2022]
Abstract
Human papillomavirus (HPV) is the most frequently sexually transmitted agent in the world. It can cause cervical and other anogenital malignancies, and oropharyngeal cancer. HPV has the unique ability to persist in the host's epithelium for a long time-longer than most viruses do-which is necessary to complete its replication cycle. To this end, HPV has developed a variety of immune evasion mechanisms, which unfortunately also favor the progression of the disease from infection to chronic dysplasia and eventually to cancer. This article summarizes the current knowledge about HPV immune evasion strategies. A special emphasis lies in HPV-mediated changes of the antigen processing machinery, which is generating epitopes for T cells and contributes to the detectability of infected cells.
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Affiliation(s)
- Alina Steinbach
- Immunotherapy & Immunoprevention, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Molecular Vaccine Design, German Center for Infection Research, Partner Site Heidelberg, Heidelberg, Germany
| | - Angelika B Riemer
- Immunotherapy & Immunoprevention, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Molecular Vaccine Design, German Center for Infection Research, Partner Site Heidelberg, Heidelberg, Germany
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Fernandes JV, DE Medeiros Fernandes TAA, DE Azevedo JCV, Cobucci RNO, DE Carvalho MGF, Andrade VS, DE Araújo JMG. Link between chronic inflammation and human papillomavirus-induced carcinogenesis (Review). Oncol Lett 2015; 9:1015-1026. [PMID: 25663851 PMCID: PMC4315066 DOI: 10.3892/ol.2015.2884] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 10/02/2014] [Indexed: 02/06/2023] Open
Abstract
Inflammation is a defense strategy against invading agents and harmful molecules that is activated immediately following a stimulus, and involves the release of cytokines and chemokines, which activate the innate immune response. These mediators act together to increase blood flow and vascular permeability, facilitating recruitment of effector cells to the site of injury. Following resolution of the injury and removal of the stimulus, inflammation is disabled, but if the stimulus persists, inflammation becomes chronic and is strongly associated with cancer. This is likely to be due to the fact that the inflammation leads to a wound that does not heal, requiring a constant renewal of cells, which increases the risk of neoplastic transformation. Debris from phagocytosis, including the reactive species of oxygen and nitrogen that cause damage to DNA already damaged by the leukotrienes and prostaglandins, has an impact on inflammation and various carcinogenic routes. There is an association between chronic inflammation, persistent infection and cancer, where oncogenic action is mediated by autocrine and paracrine signals, causing changes in somatic cells under the influence of the microbial genome or of epigenetic factors. Among the infectious agents associated with cancer, certain genotypes of human papillomavirus (HPV) stand out. HPV is responsible for virtually all cases of cervical cancer and a lower proportion of cancers of the vagina, vulva, anus, penis and a number of extragenital cancers. In the present review, recent advances in the mechanisms involved in the inflammatory response are presented with their participation in the process of carcinogenesis, emphasizing the role of chronic inflammation in the development of HPV-induced cervical cancer.
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Affiliation(s)
- José Veríssimo Fernandes
- Department of Microbiology and Parasitology, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
| | | | | | | | | | - Vania Sousa Andrade
- Department of Microbiology and Parasitology, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
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Senba M, Mori N. Mechanisms of virus immune evasion lead to development from chronic inflammation to cancer formation associated with human papillomavirus infection. Oncol Rev 2012; 6:e17. [PMID: 25992215 PMCID: PMC4419623 DOI: 10.4081/oncol.2012.e17] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 08/02/2012] [Accepted: 08/03/2012] [Indexed: 12/11/2022] Open
Abstract
Human papillomavirus (HPV) has developed strategies to escape eradication by innate and adaptive immunity. Immune response evasion has been considered an important aspect of HPV persistence, which is the main contributing factor leading to HPV-related cancers. HPV-induced cancers expressing viral oncogenes E6 and E7 are potentially recognized by the immune system. The major histocompatibility complex (MHC) class I molecules are patrolled by natural killer cells and CD8+ cytotoxic T lymphocytes, respectively. This system of recognition is a main target for the strategies of immune evasion deployed by viruses. The viral immune evasion proteins constitute useful tools to block defined stages of the MHC class I presentation pathway, and in this way HPV avoids the host immune response. The long latency period from initial infection to persistence signifies that HPV evolves mechanisms to escape the immune response. It has now been established that there are oncogenic mechanisms by which E7 binds to and degrades tumor suppressor Rb, while E6 binds to and inactivates tumor suppressor p53. Therefore, interaction of p53 and pRb proteins can give rise to an increased immortalization and genomic instability. Overexpression of NF-κB in cervical and penile cancers suggests that NF-κB activation is a key modulator in driving chronic inflammation to cancer. HPV oncogene-mediated suppression of NF-κB activity contributes to HPV escape from the immune system. This review focuses on the diverse mechanisms of the virus immune evasion with HPV that leads to chronic inflammation and cancer.
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Affiliation(s)
- Masachika Senba
- Department of Pathology, Institute of Tropical Medicine, Nagasaki University
| | - Naoki Mori
- Department of Microbiology and Oncology, Graduate School of Medicine, University of the Ryukyus, Japan
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