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Nguyen HDT, Le TM, Lee E, Lee D, Choi Y, Cho J, Park NJY, Chong GO, Seo I, Han HS. Relationship between Human Papillomavirus Status and the Cervicovaginal Microbiome in Cervical Cancer. Microorganisms 2023; 11:1417. [PMID: 37374919 DOI: 10.3390/microorganisms11061417] [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: 03/31/2023] [Revised: 05/05/2023] [Accepted: 05/25/2023] [Indexed: 06/29/2023] Open
Abstract
Uterine cervical cancer (CC) is a complex, multistep disease primarily linked to persistent infection with high-risk human papillomavirus (HR-HPV). However, it is widely acknowledged that HR-HPV infection alone cannot account for the formation and progression of CC. Emerging evidence suggests that the cervicovaginal microbiome (CVM) also plays a significant role in HPV-related CC. Certain bacteria, such as Fusobacterium spp., Porphyromonas, Prevotella, and Campylobacter, are currently being considered as potential microbiomarkers for HPV-positive CC. However, the composition of the CVM in CC is inconsistent; thus, further studies are needed. This review comprehensively discusses the complex interplay between HPV and the CVM in cervical carcinogenesis. It is postulated that the dynamic interaction between HPV and the CVM creates an imbalanced cervicovaginal microenvironment that triggers dysbiosis, enhances HPV persistence, and promotes cervical carcinogenesis. Moreover, this review aims to provide updated evidence on the potential role of bacteriotherapy, particularly probiotics, in the treatment of CC.
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Affiliation(s)
- Hong Duc Thi Nguyen
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu 41944, Republic of Korea
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Tan Minh Le
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu 41944, Republic of Korea
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Eunmi Lee
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu 41944, Republic of Korea
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Donghyeon Lee
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu 41944, Republic of Korea
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Yeseul Choi
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu 41944, Republic of Korea
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Junghwan Cho
- Clinical Omics Institute, Kyungpook National University, Daegu 41405, Republic of Korea
| | - Nora Jee-Young Park
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
- Clinical Omics Institute, Kyungpook National University, Daegu 41405, Republic of Korea
- Department of Pathology, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
- Department of Pathology, Kyungpook National University Chilgok Hospital, Daegu 41404, Republic of Korea
| | - Gun Oh Chong
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
- Clinical Omics Institute, Kyungpook National University, Daegu 41405, Republic of Korea
- Department of Obstetrics and Gynecology, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
- Department of Obstetrics and Gynecology, Kyungpook National University Chilgok Hospital, Daegu 41404, Republic of Korea
| | - Incheol Seo
- Department of Immunology, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Hyung Soo Han
- Department of Biomedical Science, Graduate School, Kyungpook National University, Daegu 41944, Republic of Korea
- BK21 Four Program, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
- Clinical Omics Institute, Kyungpook National University, Daegu 41405, Republic of Korea
- Department of Physiology, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
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da Silva J, da Costa CC, de Farias Ramos I, Laus AC, Sussuchi L, Reis RM, Khayat AS, Cavalli LR, Pereira SR. Upregulated miRNAs on the TP53 and RB1 Binding Seedless Regions in High-Risk HPV-Associated Penile Cancer. Front Genet 2022; 13:875939. [PMID: 35812732 PMCID: PMC9263206 DOI: 10.3389/fgene.2022.875939] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/26/2022] [Indexed: 12/13/2022] Open
Abstract
Cancer development by the human papillomavirus (HPV) infection can occur through the canonical HPV/p53/RB1 pathway mediated by the E2/E6/E7 viral oncoproteins. During the transformation process, HPV inserts its genetic material into host Integration Sites (IS), affecting coding genes and miRNAs. In penile cancer (PeCa) there is limited data on the miRNAs that regulate mRNA targets associated with HPV, such as the TP53 and RB1 genes. Considering the high frequency of HPV infection in PeCa patients in Northeast Brazil, global miRNA expression profiling was performed in high-risk HPV-associated PeCa that presented with TP53 and RB1 mRNA downregulated expression. The miRNA expression profile of 22 PeCa tissue samples and five non-tumor penile tissues showed 507 differentially expressed miRNAs: 494 downregulated and 13 upregulated (let-7a-5p, miR-130a-3p, miR-142-3p, miR-15b-5p miR-16-5p, miR-200c-3p, miR-205-5p, miR-21-5p, miR-223-3p, miR-22-3p, miR-25-3p, miR-31-5p and miR-93-5p), of which 11 were identified to be in HPV16-IS and targeting TP53 and RB1 genes. One hundred and thirty-one and 490 miRNA binding sites were observed for TP53 and RB1, respectively, most of which were in seedless regions. These findings suggest that up-regulation of miRNA expression can directly repress TP53 and RB1 expression by their binding sites in the non-canonical seedless regions.
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Affiliation(s)
- Jenilson da Silva
- Postgraduate Program in Health Science, Federal University of Maranhão, São Luís, Brazil
| | - Carla Cutrim da Costa
- Degree in Biological Sciences, Department of Biology, Federal University of Maranhão, São Luís, Brazil
| | - Ingryd de Farias Ramos
- Postgraduate Program in Oncology and Medical Sciences, Federal University of Pará, Belém, Brazil
| | - Ana Carolina Laus
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Brazil
| | - Luciane Sussuchi
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Brazil
| | - Rui Manuel Reis
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Brazil
| | - André Salim Khayat
- Oncology Research Center, Federal University of Pará, Belém, Brazil
- Institute of Biological Sciences, Federal University of Pará, Belém, Brazil
| | | | - Silma Regina Pereira
- Laboratory of Genetics and Molecular Biology, Department of Biology, Federal University of Maranhão, São Luís, Brazil
- *Correspondence: Silma Regina Pereira,
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Jak HPV wysokiego ryzyka indukuje optymalne środowisko dla własnej replikacji w różnicującym się nabłonku. POSTEP HIG MED DOSW 2021. [DOI: 10.2478/ahem-2021-0049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstrakt
Wirusy brodawczaka ludzkiego (HPV) są często czynnikami wywołującymi niegroźne dla człowieka infekcje, ale przetrwałe zakażenie niektórymi typami HPV jest poważnym zagrożeniem dla zdrowia, ponieważ jest związane z wieloma nowotworami, w tym z rakiem szyjki macicy oraz rosnącą liczbą nowotworów głowy i szyi. Cykl replikacyjny HPV jest ściśle zależny od różnicowania komórek wielowarstwowego nabłonka, co oznacza, że genom wirusa musi być replikowany za pomocą różnych mechanizmów na różnych etapach różnicowania komórek. Ustanowienie infekcji i utrzymywanie genomu wirusa zachodzi w proliferujących komórkach nabłonka, gdzie dostępność czynników replikacji jest optymalna dla wirusa. Jednak produktywna faza cyklu rozwojowego wirusa, w tym produktywna replikacja, późna ekspresja genów i wytwarzanie wirionów, zachodzi w wyniku różnicowania się nabłonka w komórkach, które prawidłowo opuszczają cykl komórkowy. Wirus wykorzystuje wiele szlaków sygnalizacyjnych komórki, w tym odpowiedź na uszkodzenia DNA (DDR, DNA damage response) do realizacji produktywnej replikacji własnego genomu. Zrozumienie mechanizmów związanych z cyklem replikacyjnym HPV jest potrzebne do ustalenia właściwego podejścia terapeutycznego do zwalczania chorób powodowanych przez HPV.
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Malik RM, Fazal S, Kamal MA. Computational Analysis of Domains Vulnerable to HPV-16 E6 Oncoprotein and Corresponding Hot Spot Residues. Protein Pept Lett 2021; 28:414-425. [PMID: 32703126 DOI: 10.2174/0929866527666200722134801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/19/2020] [Accepted: 06/28/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND Human Papilloma Virus (HPV) is the primary cause of cancers in cervix, head and neck regions. Oncoprotein E6 of HPV-16, after infecting human body, alters host protein- protein interaction networks. E6 interacts with several proteins, causing the infection to progress into cervical cancer. The molecular basis for these interactions is the presence of short linear peptide motifs on E6 identical to those on human proteins. METHODS Motifs of LXXLL and E/DLLL/V-G after identification on E6, were analyzed for their dynamic fluctuations by use of elastic network models. Correlation analysis of amino acid residues of E6 was also performed in specific regions of motifs. RESULTS Arginine, Leucine, Glutamine, Threonine and Glutamic acid have been identified as hot spot residues of E6 which can subsequently provide a platform for drug designing and understanding of pathogenesis of cervical cancer. These amino acids play a significant role in stabilizing interactions with host proteins, ultimately causing infections and cancers. CONCLUSION Our study validates the role of linear binding motifs of E6 of HPV in interacting with these proteins as an important event in the propagation of HPV in human cells and its transformation into cervical cancer. The study further predicts the domains of protein kinase and armadillo as part of the regions involved in the interaction of E6AP, Paxillin and TNF R1, with viral E6.
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Affiliation(s)
| | - Sahar Fazal
- Capital University of Science and Technology, Islamabad, Pakistan
| | - Mohammad Amjad Kamal
- West China School of Nursing / Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
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Zhang C, Chen H, Deng Z, Long D, Xu L, Liu Z. DGCR8/miR-106 Axis Enhances Radiosensitivity of Head and Neck Squamous Cell Carcinomas by Downregulating RUNX3. Front Med (Lausanne) 2020; 7:582097. [PMID: 33385002 PMCID: PMC7770216 DOI: 10.3389/fmed.2020.582097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 11/02/2020] [Indexed: 12/13/2022] Open
Abstract
Purpose: Head and neck squamous cell carcinoma (HNSCC) is the sixth most prevalent malignant tumor worldwide, and the radiotherapy effect is strongly associated with human papillomavirus (HPV) infection. Therefore, the aim of our study was to analyze the mechanism of HPV E7 and its effects on radiosensitivity in HNSCC cells. Methods: The mRNA expression of DiGeorge syndrome critical region gene 8 (DGCR8), has-miR-106a, and Runt-related transcription factor 3 (RUNX3) was examined by quantitative real-time PCR (RT-qPCR). The protein expression of DGCR8, E7, RUNX3, caspase-3/cleaved caspase-3, poly(ADP-ribose) polymerase (PARP)/cleaved PARP, and γH2AX was measured by Western blot. The expression level of DGCR8 was measured by immunofluorescence assay. Starbase database (http://starbase.sysu.edu.cn/) was used to analyze the correlation between has-miR-106a-5p and DGCR8. TargetScan database (http://www.targetscan.org/vert_72/) was adopted to calculate the prediction of binding sites. Radiosensitivity was evaluated through clone formation assays and Cell Counting Kit-8 (CCK-8) assays. Results: In our study, we found that the mRNA and protein expression levels of HPV E7 and DGCR8 in HPV-positive HNSCC cells were higher than those in HPV-negative cells. The expression of DGCR8 was increased in FaDu and UM-SCC-4 with E7 overexpression, while the expression of DGCR8 was decreased in UM-SCC-47 and UPCI-SCC-090 with E7 silence. The miR-106a expression was increased after DGCR8 overexpression in FaDu and UM-SCC-4. However, the miR-106a expression was decreased in UM-SCC-47 and UPCI-SCC-090 with E7 silence. In radiation conditions, clone formation assays found that less clones formed in FaDu and UM-SCC-4 cells subsequent to silencing DGCR8 or miR-106a than that in the control group, and more clones were formed in UM-SCC-47 and UPCI-SCC-090 cells overexpressing DGCR8 or miR-106a than that in the control group. Luciferase reporter gene assays verified that miR-106a targeted the 3' untranslated region (UTR) of RUNX3 mRNA. MiR-106a overexpression resulted in a decrease in RUNX3 expression, and miR-106a silence increased RUNX3 expression. Rescue experiments conducted with miR-106a inhibitor restored radiation resistance and reduced DNA damage in radiation condition. Conclusions: Our study indicated that HPV E7 activated DGCR8/miR-106a/RUNX3 axis to enhance radiation sensitivity and provided directions for targeted therapeutic interventions.
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Affiliation(s)
- Chunlin Zhang
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Hangqi Chen
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Zeyi Deng
- Department of Otorhinolaryngology, Head and Neck Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Dan Long
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Li Xu
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Zhaohui Liu
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
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Squarzanti DF, Zavattaro E, Pizzimenti S, Amoruso A, Savoia P, Azzimonti B. Non-Melanoma Skin Cancer: news from microbiota research. Crit Rev Microbiol 2020; 46:433-449. [PMID: 32692305 DOI: 10.1080/1040841x.2020.1794792] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Recently, research has been deeply focusing on the role of the microbiota in numerous diseases, either affecting the skin or other organs. What it is well established is that its dysregulation promotes several cutaneous disorders (i.e. psoriasis and atopic dermatitis). To date, little is known about its composition, mediators and role in the genesis, progression and response to therapy of Non-Melanoma Skin Cancer (NMSC). Starting from a bibliographic study, we classified the selected articles into four sections: i) normal skin microbiota; ii) in vitro study models; iii) microbiota and NMSC and iv) probiotics, antibiotics and NMSC. What has emerged is how skin microflora changes, mainly represented by increases of Staphylococcus aureus, Streptococcus pyogenes and Pseudomonas aeruginosa strains, modifications in the mutual quantity of β-Human papillomavirus genotypes, of Epstein Barr Virus and Malassezia or candidiasis, may contribute to the induction of a state of chronic self-maintaining inflammation, leading to cancer. In this context, the role of S. aureus and that of specific antimicrobial peptides look to be prominent. Moreover, although antibiotics may contribute to carcinogenesis, due to their ability to influence the microbiota balance, specific probiotics, such as Lacticaseibacillus rhamnosus GG, Lactobacillus johnsonii NCC 533 and Bifidobacteria spp., may be protective.
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Affiliation(s)
- Diletta Francesca Squarzanti
- Department of Health Sciences (DiSS), University of Piemonte Orientale (UPO), Novara, Italy.,Center for Translational Research on Autoimmune and Allergic Diseases (CAAD), DiSS, UPO, Novara, Italy
| | - Elisa Zavattaro
- Department of Translational Medicine (DiMeT), UPO, Novara, Italy
| | - Stefania Pizzimenti
- Department of Clinical and Biological Sciences (DSCB), University of Turin, Turin, Italy
| | | | - Paola Savoia
- Department of Health Sciences (DiSS), University of Piemonte Orientale (UPO), Novara, Italy
| | - Barbara Azzimonti
- Department of Health Sciences (DiSS), University of Piemonte Orientale (UPO), Novara, Italy.,Center for Translational Research on Autoimmune and Allergic Diseases (CAAD), DiSS, UPO, Novara, Italy
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Zhang C, Mi J, Deng Y, Deng Z, Long D, Liu Z. DNMT1 Enhances the Radiosensitivity of HPV-Positive Head and Neck Squamous Cell Carcinomas via Downregulating SMG1. Onco Targets Ther 2020; 13:4201-4211. [PMID: 32523356 PMCID: PMC7237113 DOI: 10.2147/ott.s227395] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 02/18/2020] [Indexed: 01/21/2023] Open
Abstract
Introduction Head and neck squamous cell carcinoma (HNSCC), which rank the 7th malignant tumors worldwide, is closely related to methylation and HPV infection. Ionizing radiation therapy is the main strategy for HNSCC patients in advanced stage. Previously, HPV-positive HNSCC predict better prognosis than HPV-negative HNSCCs under radiotherapy, however its molecular mechanism is unresolved. SMG1 serves as a potential tumor suppressor in various cancers, including HNSCC. Methods The mRNAs and proteins expression of HPV E6/E7, p16, p53, DNMT1, SMG1 were detected after different treatments by qPCR and Western blot. The clone formation ability was measured in radiation dose after different treatments. Results In our study, the expression of HPV16 E6, DNA Methyltransferase 1(DNMT1) and SMG1 in head and neck carcinomas cell lines was detected by RT-qPCR and Western blot. Forced E6 level in HPV-negative cells by overexpression plasmid promoted the expression of DNMT1, which resulted in decreased SMG1 expression. Silenced SMG1 in HPV-negative HNSCC cells elicited increased radiation sensitivity, suggesting that SMG1 may be an effective switch to regulate the effect of radiotherapy in HNSCC. Conclusion Our study indicated that DNMT1 enhances the radiosensitivity of HPV-positive head and neck squamous cell carcinomas via downregulating SMG1.
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Affiliation(s)
- Chunlin Zhang
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, People's Republic of China
| | - Jiaoping Mi
- Department of Otorhinolaryngology, Head and Neck Surgery, The Fifth Affiliated Hospital of Sun Yat-Sun University, Zunyi, People's Republic of China
| | - Yuan Deng
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, People's Republic of China
| | - Zeyi Deng
- Department of Otorhinolaryngology, Head and Neck Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Dan Long
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, People's Republic of China.,The Graduate School of Zunyi Medical University, Zunyi, People's Republic of China
| | - Zhaohui Liu
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, People's Republic of China
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Macedo J, Silva E, Nogueira L, Coelho R, da Silva J, Dos Santos A, Teixeira-Júnior AA, Belfort M, Silva G, Khayat A, de Oliveira E, Dos Santos AP, Cavalli LR, Pereira SR. Genomic profiling reveals the pivotal role of hrHPV driving copy number and gene expression alterations, including mRNA downregulation of TP53 and RB1 in penile cancer. Mol Carcinog 2020; 59:604-617. [PMID: 32212199 DOI: 10.1002/mc.23185] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 02/26/2020] [Accepted: 03/02/2020] [Indexed: 12/13/2022]
Abstract
The incidence of penile cancer (PeCa) is increasing worldwide, however, the highest rates are reported in underdeveloped countries. The molecular mechanisms that underly the onset and progression of these tumors are still unclear. Therefore, our goal was to determine the genome-wide copy number alterations and the involvement of human papiloma virus (HPV) (TP53 and RB1), inflammatory (COX2 and EGFR), and PI3K/AKT pathway (AKT1, AKT2, EGFR, ERBB3, ERBB4, PIK3CA, and PTEN) associated genes in patients with PeCa from a high incidence region in Brazil (Maranhão). HPV genotyping was performed by nest-PCR and genome sequencing, copy number alterations (CNAs) by array comparative genomic hybridization and gene copy number status, gene, and protein expression by quantitative polymerase chain reaction, reverse transcriptase-quantitative polymerase chain reaction, and immunohistochemistry, respectively. HPV genotyping revealed one of the highest frequencies of HPV reported in PeCa, affecting 96.4% of the cases. The most common CNAs observed were located at the HPV integration sites, such as 2p12-p11.2 and 14q32.33, where ADAM 6, KIAA0125, LINC00226, LINC00221, and miR7641-2, are mapped. Increased copy number of ERBB3 and EGFR genes were observed in association with COX2 and EGFR overexpression, reinforcing the role of the inflammatory pathway in PeCa, and suggesting anti-EGFR and anti-COX2 inhibitors as promising therapies for PeCa. Additionally, TP53 and RB1 messenger RNA downregulation was observed, suggesting the occurrence of other mechanisms for repression of these oncoproteins, in addition to the canonical HPV/TP53/RB1 signaling pathway. Our data reinforce the role of epigenetic events in abnormal gene expression in HPV-associated carcinomas and suggest the pivotal role of HPV driving CNAs and controlling gene expression in PeCa.
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Affiliation(s)
- Juliana Macedo
- Postgraduate Program in Health Science, Federal University of Maranhão, São Luís, Maranhão, Brazil
| | - Elis Silva
- Laboratory of Genetics and Molecular Biology, Department of Biology, Federal University of Maranhão, São Luís, Maranhão, Brazil
| | | | - Ronald Coelho
- Aldenora Bello Cancer Hospital, São Luís, Maranhão, Brazil
| | - Jenilson da Silva
- Postgraduate Program in Health Science, Federal University of Maranhão, São Luís, Maranhão, Brazil.,Laboratory of Genetics and Molecular Biology, Department of Biology, Federal University of Maranhão, São Luís, Maranhão, Brazil
| | - Alcione Dos Santos
- Public Health Department, Federal University of Maranhão, São Luís, Maranhão, Brazil
| | | | - Marta Belfort
- Postgraduate Program in Health Science, Federal University of Maranhão, São Luís, Maranhão, Brazil
| | - Gyl Silva
- Biology Undergraduate Course, Department of Pathology, Federal University of Maranhão, São Luís, Maranhão, Brazil
| | - André Khayat
- Oncology Research Center, Federal University of Pará, Belém, Pará, Brazil
| | - Edivaldo de Oliveira
- Tissue Culture and Cytogenetics Laboratory, Institute of Evandro Chagas, Belém, Pará, Brazil
| | - Ana Paula Dos Santos
- Department of Physiological Sciences, Federal University of Maranhão, São Luís, Maranhão, Brazil
| | - Luciane R Cavalli
- Faculdades Pequeno Príncipe, Instituto de Pesquisa Pelé Pequeno Príncipe, Curitiba, Paraná, Brazil.,Department of Oncology, Georgetown Lombardi Comprehensive Cancer Center, Washington, District of Columbia, United States
| | - Silma Regina Pereira
- Laboratory of Genetics and Molecular Biology, Department of Biology, Federal University of Maranhão, São Luís, Maranhão, Brazil
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Human papillomavirus E7 oncoprotein targets RNF168 to hijack the host DNA damage response. Proc Natl Acad Sci U S A 2019; 116:19552-19562. [PMID: 31501315 DOI: 10.1073/pnas.1906102116] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
High-risk human papillomaviruses (HR-HPVs) promote cervical cancer as well as a subset of anogenital and head and neck cancers. Due to their limited coding capacity, HPVs hijack the host cell's DNA replication and repair machineries to replicate their own genomes. How this host-pathogen interaction contributes to genomic instability is unknown. Here, we report that HPV-infected cancer cells express high levels of RNF168, an E3 ubiquitin ligase that is critical for proper DNA repair following DNA double-strand breaks, and accumulate high numbers of 53BP1 nuclear bodies, a marker of genomic instability induced by replication stress. We describe a mechanism by which HPV E7 subverts the function of RNF168 at DNA double-strand breaks, providing a rationale for increased homology-directed recombination in E6/E7-expressing cervical cancer cells. By targeting a new regulatory domain of RNF168, E7 binds directly to the E3 ligase without affecting its enzymatic activity. As RNF168 knockdown impairs viral genome amplification in differentiated keratinocytes, we propose that E7 hijacks the E3 ligase to promote the viral replicative cycle. This study reveals a mechanism by which tumor viruses reshape the cellular response to DNA damage by manipulating RNF168-dependent ubiquitin signaling. Importantly, our findings reveal a pathway by which HPV may promote the genomic instability that drives oncogenesis.
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