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1.
J Mol Biol ; 434(11): 167408, 2022 06 15.
Artigo em Inglês | MEDLINE | ID: mdl-34929203

RESUMO

Detecting viral and vector integration events is a key step when investigating interactions between viral and host genomes. This is relevant in several fields, including virology, cancer research and gene therapy. For example, investigating integrations of wild-type viruses such as human papillomavirus and hepatitis B virus has proven to be crucial for understanding the role of these integrations in cancer. Furthermore, identifying the extent of vector integration is vital for determining the potential for genotoxicity in gene therapies. To address these questions, we developed isling, the first tool specifically designed for identifying viral integrations in both wild-type and vector from next-generation sequencing data. Isling addresses complexities in integration behaviour including integration of fragmented genomes and integration junctions with ambiguous locations in a host or vector genome, and can also flag possible vector recombinations. We show that isling is up to 1.6-fold faster and up to 170% more accurate than other viral integration tools, and performs well on both simulated and real datasets. Isling is therefore an efficient and application-agnostic tool that will enable a broad range of investigations into viral and vector integration. These include comparisons between integrations of wild-type viruses and gene therapy vectors, as well as assessing the genotoxicity of vectors and understanding the role of viruses in cancer.


Assuntos
Terapia Genética , Vetores Genéticos , Software , Integração Viral , Alphapapillomavirus/fisiologia , Vetores Genéticos/fisiologia , Vírus da Hepatite B/fisiologia , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Neoplasias/virologia
2.
Viruses ; 13(12)2021 12 10.
Artigo em Inglês | MEDLINE | ID: mdl-34960740

RESUMO

Understanding and modulating the early steps in oncogenic Human Papillomavirus (HPV) infection has great cancer-preventative potential, as this virus is the etiological agent of virtually all cervical cancer cases and is associated with many other anogenital and oropharyngeal cancers. Previous work from our laboratory has identified cell-surface-expressed vimentin as a novel HPV16 pseudovirus (HPV16-PsVs)-binding molecule modulating its infectious potential. To further explore its mode of inhibiting HPV16-PsVs internalisation, we supplemented it with exogenous recombinant human vimentin and show that only the globular form of the molecule (as opposed to the filamentous form) inhibited HPV16-PsVs internalisation in vitro. Further, this inhibitory effect was only transient and not sustained over prolonged incubation times, as demonstrated in vitro and in vivo, possibly due to full-entry molecule engagement by the virions once saturation levels have been reached. The vimentin-mediated delay of HPV16-PsVs internalisation could be narrowed down to affecting multiple steps during the virus' interaction with the host cell and was found to affect both heparan sulphate proteoglycan (HSPG) binding as well as the subsequent entry receptor complex engagement. Interestingly, decreased pseudovirus internalisation (but not infection) in the presence of vimentin was also demonstrated for oncogenic HPV types 18, 31 and 45. Together, these data demonstrate the potential of vimentin as a modulator of HPV infection which can be used as a tool to study early mechanisms in infectious internalisation. However, further refinement is needed with regard to vimentin's stabilisation and formulation before its development as an alternative prophylactic means.


Assuntos
Papillomavirus Humano 16/fisiologia , Vimentina/farmacologia , Internalização do Vírus , Alphapapillomavirus/fisiologia , Animais , Membrana Celular/virologia , Feminino , Células HEK293 , Proteoglicanas de Heparan Sulfato/metabolismo , Interações Hospedeiro-Patógeno , Humanos , Camundongos , Camundongos Endogâmicos C57BL , Infecções por Papillomavirus/virologia , Conformação Proteica , Receptores Virais/metabolismo , Proteínas Recombinantes/química , Proteínas Recombinantes/farmacologia , Vimentina/química , Pseudotipagem Viral , Vírion/fisiologia
3.
J Reprod Immunol ; 148: 103435, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34741834

RESUMO

Cervical carcinoma is significantly associated with the human papillomavirus (HPV). Persistent infection with high risk-HPV is necessary but not sufficient for the development of cervical cancer. It is not fully understood which immunological mechanisms lead to persistence in some patients. During the life cycle, HPV uses excellent immune evasion mechanisms. Keratinocytes, Langerhans cells (LC), dendritic cells (DC), tissue-resident macrophages, and intraepithelial gamma-delta T cells (γδ T cells) are cellular components of the mucosal immune defense of the female genital tract against HPV. γδ T cells, the prototype of unconventional T cells, play a major role in the first line defense of epithelial barrier protection. γδ T cells connect the innate and adaptive immunity and behave like a guardian of the epithelium against any form of damage such as trauma and infection. Any changes in γδ T cell distribution and functional capability may have a role in persistent HPV infection and cervical carcinogenesis in the early phase. Poor stimulation and maturation of APCs (LC/DC) might lead to persistent HPV infection which all point out pivotal role of γδ T cells in HPV persistence. If such an intriguing link is proven, γδ T cells can be used in potential therapeutics against HPV in infected patients.


Assuntos
Alphapapillomavirus/fisiologia , Células Apresentadoras de Antígenos/imunologia , Colo do Útero/imunologia , Infecções por Papillomavirus/imunologia , Linfócitos T/imunologia , Animais , Diferenciação Celular , Colo do Útero/virologia , Feminino , Humanos , Imunidade Inata , Receptor Cross-Talk , Receptores de Antígenos de Linfócitos T gama-delta/metabolismo
4.
mBio ; 12(6): e0268421, 2021 12 21.
Artigo em Inglês | MEDLINE | ID: mdl-34749533

RESUMO

The life cycle of human papillomavirus (HPV) depends on keratinocyte differentiation as the virus modulates and takes advantage of cellular pathways to replicate its genome and assemble viral particles in differentiated cells. Viral genomes are amplified in nuclear replication foci in differentiated keratinocytes, and DNA repair factors from the DNA damage response signaling pathway are recruited to replicate viral DNA. The HPV genome is associated with cellular histones at all stages of the infectious cycle, and here, we show that the histone variant macroH2A1 is bound to the HPV genome and enriched in viral replication foci in differentiated cells. macroH2A1 isoforms play important roles in cellular transcriptional repression, double-strand break repair, and replication stress. The viral E8^E2 protein also binds to the HPV genome and inhibits viral replication and gene expression by recruiting NCoR/SMRT complexes. We show here that E8^E2 and SMRT also localize within replication foci, though independently from macroH2A1. Conversely, transcription complexes containing RNA polymerase II and Brd4 are located on the surface of the foci. Foci generated with an HPV16 E8^E2 mutant genome are not enriched for SMRT or macroH2A1 but contain transcriptional complexes throughout the foci. We propose that both the cellular macroH2A1 protein and viral E8^E2 protein help to spatially separate replication and transcription activities within viral replication foci. IMPORTANCE Human papillomaviruses are small DNA viruses that cause chronic infection of cutaneous and mucosal epithelium. In some cases, persistent infection with HPV can result in cancer, and 5% of human cancers are the result of HPV infection. In differentiated cells, HPV amplifies viral DNA in nuclear replication factories and transcribes late mRNAs to produce capsid proteins. However, very little is known about the spatial organization of these activities in the nucleus. Here, we show that repressive viral and cellular factors localize within the foci to suppress viral transcription, while active transcription takes place on the surface. The cellular histone variant macroH2A1 is important for this spatial organization.


Assuntos
Alphapapillomavirus/fisiologia , Genoma Viral , Infecções por Papillomavirus/virologia , Replicação Viral , Alphapapillomavirus/genética , Histonas/genética , Histonas/metabolismo , Interações Hospedeiro-Patógeno , Humanos , Correpressor 1 de Receptor Nuclear/genética , Correpressor 1 de Receptor Nuclear/metabolismo , Correpressor 2 de Receptor Nuclear/genética , Correpressor 2 de Receptor Nuclear/metabolismo , Proteínas Oncogênicas Virais/genética , Proteínas Oncogênicas Virais/metabolismo , Infecções por Papillomavirus/genética , Infecções por Papillomavirus/metabolismo
5.
Br J Cancer ; 125(10): 1408-1419, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34526665

RESUMO

BACKGROUND: Integration of human papillomavirus (HPV) into the host genome is a dominant feature of invasive cervical cancer (ICC), yet the tumorigenicity of cis genomic changes at integration sites remains largely understudied. METHODS: Combining multi-omics data from The Cancer Genome Atlas with patient-matched long-read sequencing of HPV integration sites, we developed a strategy for using HPV integration events to identify and prioritise novel candidate ICC target genes (integration-detected genes (IDGs)). Four IDGs were then chosen for in vitro functional studies employing small interfering RNA-mediated knockdown in cell migration, proliferation and colony formation assays. RESULTS: PacBio data revealed 267 unique human-HPV breakpoints comprising 87 total integration events in eight tumours. Candidate IDGs were filtered based on the following criteria: (1) proximity to integration site, (2) clonal representation of integration event, (3) tumour-specific expression (Z-score) and (4) association with ICC survival. Four candidates prioritised based on their unknown function in ICC (BNC1, RSBN1, USP36 and TAOK3) exhibited oncogenic properties in cervical cancer cell lines. Further, annotation of integration events provided clues regarding potential mechanisms underlying altered IDG expression in both integrated and non-integrated ICC tumours. CONCLUSIONS: HPV integration events can guide the identification of novel IDGs for further study in cervical carcinogenesis and as putative therapeutic targets.


Assuntos
Alphapapillomavirus/fisiologia , Perfilação da Expressão Gênica/métodos , Infecções por Papillomavirus/genética , Neoplasias do Colo do Útero/virologia , Sequenciamento Completo do Genoma/métodos , Linhagem Celular Tumoral , Movimento Celular , Proliferação de Células , Proteínas de Ligação a DNA/genética , Feminino , Regulação Neoplásica da Expressão Gênica , Células HeLa , Humanos , Infecções por Papillomavirus/virologia , Proteínas Serina-Treonina Quinases/genética , Análise de Sobrevida , Fatores de Transcrição/genética , Ubiquitina Tiolesterase/genética , Neoplasias do Colo do Útero/genética , Integração Viral
6.
Viruses ; 13(9)2021 09 16.
Artigo em Inglês | MEDLINE | ID: mdl-34578427

RESUMO

Papillomaviruses cause persistent, and usually self-limiting, infections in the mucosal and cutaneous surfaces of the host epithelium. However, in some cases, infection with an oncogenic HPV can lead to cancer. The viral genome is a small, double-stranded circular DNA molecule that is assembled into nucleosomes at all stages of infection. The viral minichromosome replicates at a low copy number in the nucleus of persistently infected cells using the cellular replication machinery. When the infected cells differentiate, the virus hijacks the host DNA damage and repair pathways to replicate viral DNA to a high copy number to generate progeny virions. This strategy is highly effective and requires a close association between viral and host chromatin, as well as cellular processes associated with DNA replication, repair, and transcription. However, this association can lead to accidental integration of the viral genome into host DNA, and under certain circumstances integration can promote oncogenesis. Here we describe the fate of viral DNA at each stage of the viral life cycle and how this might facilitate accidental integration and subsequent carcinogenesis.


Assuntos
Alphapapillomavirus/genética , Alphapapillomavirus/fisiologia , DNA Viral/genética , DNA Viral/metabolismo , Genoma Viral , Infecções por Papillomavirus/virologia , Integração Viral , Carcinogênese , Diferenciação Celular , Proliferação de Células , Cromossomos Humanos/virologia , Humanos , Mitose , Corpos Nucleares da Leucemia Promielocítica/virologia , Proteínas Virais/metabolismo , Replicação Viral
7.
Fam Community Health ; 44(4): 245-256, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34397570

RESUMO

We compared the effectiveness of an educational intervention at reducing stigma and improving knowledge of human papillomavirus (HPV) and cervical cancer among Nigerian men and women. We used a pre-/posttest design to deliver 2 educational interventions to 266 adults. Low knowledge was observed at baseline, which improved significantly post-intervention with no difference between groups. No significant changes were observed between groups in 5 out the 6 stigma domains. Health education was effective in improving knowledge. However, the lack of positive change in stigma shows urgent need for HPV and cervical cancer stigma reduction interventions.


Assuntos
Alphapapillomavirus , Educação em Saúde , Infecções por Papillomavirus , Adulto , Alphapapillomavirus/fisiologia , Feminino , Educação em Saúde/normas , Educação em Saúde/estatística & dados numéricos , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Masculino , Nigéria , Infecções por Papillomavirus/complicações , Infecções por Papillomavirus/prevenção & controle , Vacinas contra Papillomavirus , Aceitação pelo Paciente de Cuidados de Saúde , Neoplasias do Colo do Útero/prevenção & controle
8.
Am J Pathol ; 191(10): 1774-1786, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34303699

RESUMO

Viruses are the second leading cause of cancer worldwide, and human papillomavirus (HPV)-associated head and neck cancers are increasing in incidence in the United States. HPV preferentially infects the crypts of the tonsils rather than the surface epithelium. The present study sought to characterize the unique microenvironment within the crypts to better understand the viral tropism of HPV to a lymphoid-rich organ. Laser-capture microdissection of distinct anatomic areas (crypts, surface epithelium, and germinal centers) of the tonsil, coupled with transcriptional analysis and multiparameter immunofluorescence staining demonstrated that the tonsillar crypts are enriched with myeloid populations that co-express multiple canonical and noncanonical immune checkpoints, including PD-L1, CTLA-4, HAVCR2 (TIM-3), ADORA2A, IDO1, BTLA, LGALS3, CDH1, CEACAM1, PVR, and C10orf54 (VISTA). The resident monocytes may foster a permissive microenvironment that facilitates HPV infection and persistence. Furthermore, the myeloid populations within HPV-associated tonsil cancers co-express the same immune checkpoints, providing insight into potential novel immunotherapeutic targets for HPV-associated head and neck cancers.


Assuntos
Alphapapillomavirus/fisiologia , Células Mieloides/patologia , Células Mieloides/virologia , Tonsila Palatina/patologia , Tonsila Palatina/virologia , Tropismo Viral/fisiologia , Antígenos CD/metabolismo , Antígenos B7/metabolismo , Antígeno B7-H1/metabolismo , Moléculas de Adesão Celular/metabolismo , Epitélio/patologia , Epitélio/virologia , Centro Germinativo/patologia , Neoplasias de Cabeça e Pescoço/patologia , Neoplasias de Cabeça e Pescoço/virologia , Humanos , Proteínas de Checkpoint Imunológico/metabolismo , Microdissecção e Captura a Laser , Monócitos/patologia , Receptores Virais/metabolismo , Transcriptoma/genética
9.
Int J Cancer ; 149(10): 1833-1844, 2021 11 15.
Artigo em Inglês | MEDLINE | ID: mdl-34310698

RESUMO

Human papillomavirus (HPV)-induced anal intraepithelial neoplasia (AIN, graded 1-3) is highly prevalent in HIV-positive (HIV+) men who have sex with men (MSM), but only a minority of lesions progresses to cancer. Our study aimed to characterise comprehensively anal tissue samples from a cross-sectional series (n = 104) of HIV+ MSM and longitudinal series (n = 40) of AIN2/3 progressing to cancer using different biomarkers. The cross-sectional series consisted of 8 normal, 26 AIN1, 45 AIN2, 15 AIN3 and 10 anal squamous cell carcinoma. Tissue sections were immunohistochemically (IHC) stained for p16 (viral transformation marker), Ki-67 (cellular proliferation marker) and HPV-E4 (viral production marker). We evaluated the expression of IHC markers and compared it with DNA methylation, a marker for malignant transformation. E4 positivity decreased, whereas p16 and Ki-67 scores and methylation marker positivity increased (P values < .001) with increasing severity of anal lesions. Within AIN2, a heterogeneous biomarker pattern was observed concerning E4, p16 and methylation status, reflecting the biological heterogeneity of these lesions. In the longitudinal series, all AIN2/3 and carcinomas showed high p16 and Ki-67 expression, strong methylation positivity and occasional E4 positivity. We earlier showed that high methylation levels are associated with progression to cancer. The observed E4 expression in some AIN2/3 during the course of progression to cancer and absence of E4 in a considerable number of AIN1 lesions make the potential clinical significance of E4 expression difficult to interpret. Our data show that IHC biomarkers can help to characterise AIN; however, their prognostic value for cancer risk stratification, next to objective methylation analysis, appears to be limited.


Assuntos
Canal Anal/metabolismo , Neoplasias do Ânus/metabolismo , Biomarcadores Tumorais/biossíntese , Carcinoma in Situ/metabolismo , Inibidor p16 de Quinase Dependente de Ciclina/biossíntese , Infecções por HIV/metabolismo , Homossexualidade Masculina/estatística & dados numéricos , Antígeno Ki-67/biossíntese , Adulto , Alphapapillomavirus/metabolismo , Alphapapillomavirus/fisiologia , Canal Anal/patologia , Neoplasias do Ânus/diagnóstico , Neoplasias do Ânus/genética , Biomarcadores Tumorais/genética , Carcinoma in Situ/diagnóstico , Carcinoma in Situ/genética , Estudos Transversais , Metilação de DNA , Infecções por HIV/genética , Infecções por HIV/virologia , Humanos , Imuno-Histoquímica/métodos , Masculino , Proteínas Oncogênicas Virais/biossíntese , Infecções por Papillomavirus/genética , Infecções por Papillomavirus/metabolismo , Infecções por Papillomavirus/virologia , Estudos Retrospectivos
10.
J Med Virol ; 93(11): 6089-6099, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34180541

RESUMO

The role of human papillomavirus (HPV) in the development of oral lesions is controversial. There has been no comprehensive study about HPV prevalence in Iran. This systematic review and meta-analysis were aimed at finding HPV prevalence of oral lesions and normal oral mucosa in Iran. International (PubMed, Web of Science, and Scopus) and national (Iranmedex, Irandoc, and SID) databases were searched systematically until October 2020. Studies that examined the prevalence of HPV in oral lesions by polymerase chain reaction method were included. The heterogeneity of articles was assessed with the Cochran test and I-Square statistics. The prevalence rate of HPV was calculated using a random-effect model. Of 3729 initially searched articles, 29 articles were eligible for inclusion. The overall prevalence of HPV in oral lesions was 21%. The prevalence was the highest in Rasht (50%) city. Lip lesions had the highest HPV prevalence (40%). According to the classification of lesions, the highest prevalence was of precancerous lesions (29%) and the lowest in normal mucosa (8%). Well-differentiated tumors showed a higher prevalence than poorly-differentiated ones. The highest prevalence of HPV was hairy leukoplakia (70%) and the lowest was of pyogenic granuloma (6%). Also, the prevalence was 31% in oral squamous cell carcinoma. There are differences between HPV prevalence according to the geographical area, intraoral location, type of lesion, and grading. As HPV prevalence was fairly high, further attention to vaccination and treatment for HPV in Iran, as a potential risk factor for oral precancerous and cancerous lesions is recommended.


Assuntos
Alphapapillomavirus/genética , Alphapapillomavirus/fisiologia , Carcinoma de Células Escamosas/virologia , Neoplasias Bucais/virologia , Infecções por Papillomavirus/complicações , Granuloma Piogênico/virologia , Humanos , Irã (Geográfico)/epidemiologia , Leucoplasia Oral/virologia , Mucosa Bucal/virologia , Infecções por Papillomavirus/epidemiologia , Lesões Pré-Cancerosas/virologia , Prevalência
11.
OMICS ; 25(6): 358-371, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-34037476

RESUMO

About a tenth of all cancers are caused by viruses or associated with viral infection. Recent global events including the coronavirus disease-2019 (COVID-19) pandemic means that human encounter with viruses is increased. Cancer development in individuals with viral infection can take many years after infection, demonstrating that the involvement of viruses in cancer development is a long and complex process. This complexity emanates from individual genetic heterogeneity and the many steps involved in cancer development owing to viruses. The process of tumorigenesis is driven by the complex interaction between several viral factors and host factors leading to the creation of a tumor microenvironment (TME) that is ideal and promotes tumor formation. Viruses associated with human cancers ensure their survival and proliferation through activation of several cellular processes including inflammation, migration, and invasion, resistance to apoptosis and growth suppressors. In addition, most human oncoviruses evade immune detection and can activate signaling cascades including the PI3K-Akt-mTOR, Notch and Wnt pathways associated with enhanced proliferation and angiogenesis. This expert review examines and synthesizes the multiple biological factors related to oncoviruses, and the signaling cascades activated by these viruses contributing to viral oncogenesis. In particular, I examine and review the Epstein-Barr virus, human papillomaviruses, and Kaposi's sarcoma herpes virus in a context of cancer pathogenesis. I conclude with a future outlook on therapeutic targeting of the viruses and their associated oncogenic pathways within the TME. These anticancer strategies can be in the form of, but not limited to, antibodies and inhibitors.


Assuntos
Infecções por Vírus Epstein-Barr/virologia , Neoplasias/virologia , Infecções por Papillomavirus/virologia , Infecções por Retroviridae/virologia , Retroviridae/fisiologia , Sarcoma de Kaposi/virologia , Infecções Tumorais por Vírus/virologia , Alphapapillomavirus/fisiologia , Carcinogênese , Transformação Celular Viral , Infecções por Vírus Epstein-Barr/patologia , Herpesvirus Humano 4/fisiologia , Herpesvirus Humano 8/fisiologia , Humanos , Terapia de Alvo Molecular , Neoplasias/patologia , Neoplasias/terapia , Infecções por Papillomavirus/patologia , Infecções por Retroviridae/patologia , Sarcoma de Kaposi/patologia , Transdução de Sinais , Microambiente Tumoral , Infecções Tumorais por Vírus/patologia
12.
PLoS Pathog ; 17(5): e1009580, 2021 05.
Artigo em Inglês | MEDLINE | ID: mdl-33974675

RESUMO

Human papillomaviruses (HPVs) utilize an atypical mode of nuclear import during cell entry. Residing in the Golgi apparatus until mitosis onset, a subviral complex composed of the minor capsid protein L2 and viral DNA (L2/vDNA) is imported into the nucleus after nuclear envelope breakdown by associating with mitotic chromatin. In this complex, L2 plays a crucial role in the interactions with cellular factors that enable delivery and ultimately tethering of the viral genome to mitotic chromatin. To date, the cellular proteins facilitating these steps remain unknown. Here, we addressed which cellular proteins may be required for this process. Using label-free mass spectrometry, biochemical assays, microscopy, and functional virological assays, we discovered that L2 engages a hitherto unknown protein complex of Ran-binding protein 10 (RanBP10), karyopherin alpha2 (KPNA2), and dynein light chain DYNLT3 to facilitate transport towards mitotic chromatin. Thus, our study not only identifies novel cellular interactors and mechanism that facilitate a poorly understood step in HPV entry, but also a novel cellular transport complex.


Assuntos
Alphapapillomavirus/fisiologia , Proteínas do Capsídeo/metabolismo , Núcleo Celular/metabolismo , DNA Viral/metabolismo , Genoma Viral/genética , Fatores de Troca do Nucleotídeo Guanina/metabolismo , Proteínas Associadas aos Microtúbulos/metabolismo , Infecções por Papillomavirus/virologia , Transporte Ativo do Núcleo Celular , Alphapapillomavirus/genética , Proteínas do Capsídeo/genética , Cromatina/genética , Dineínas/genética , Dineínas/metabolismo , Fatores de Troca do Nucleotídeo Guanina/genética , Humanos , Proteínas Associadas aos Microtúbulos/genética , Mitose , Internalização do Vírus , alfa Carioferinas/genética , alfa Carioferinas/metabolismo
13.
JNCI Cancer Spectr ; 5(2): pkab011, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33748668

RESUMO

The current global novel coronavirus disease 2019 (COVID-19) pandemic threatens to derail the uptake of human papillomavirus (HPV) vaccination in low- and lower-middle income countries with major disruptions to routine immunization and the introduction of new vaccines delayed. This has a major impact on the World Health Organization cervical cancer elimination strategy, where it is dependent on HPV vaccination as well as cervical cancer screening and treatment. We discuss current opportunities and barriers to achieve high uptake of HPV vaccination in low- and lower-middle income countries as well as the impact of COVID-19. Implementation of 4 key recommendations for HPV vaccination in low- and lower-middle income countries is needed: increased global financial investment; improved vaccine supply and accelerated use of a single-dose schedule; education and social marketing; and adoption of universal school-based delivery. With the commitment of the global health community, the adoption of these strategies would underpin the effective elimination of cervical cancer.


Assuntos
Alphapapillomavirus/imunologia , COVID-19/complicações , Infecções por Papillomavirus/imunologia , Vacinas contra Papillomavirus/imunologia , Neoplasias do Colo do Útero/imunologia , Vacinação/estatística & dados numéricos , Alphapapillomavirus/fisiologia , COVID-19/epidemiologia , COVID-19/virologia , Países em Desenvolvimento , Feminino , Humanos , Programas de Imunização/economia , Programas de Imunização/estatística & dados numéricos , Pandemias , Infecções por Papillomavirus/complicações , Infecções por Papillomavirus/prevenção & controle , Vacinas contra Papillomavirus/administração & dosagem , SARS-CoV-2/fisiologia , Neoplasias do Colo do Útero/prevenção & controle , Neoplasias do Colo do Útero/virologia , Vacinação/métodos
14.
Immunol Invest ; 50(7): 821-832, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-33724139

RESUMO

The identification of the human papillomavirus (HPV) as the causative agent of multiple cancers allowed for the development of vaccines and immunization strategies to prevent cancers caused by HPV infection. The public health ramifications of reduction of HPV disease burden are momentous in scope. Vaccine hesitancy has impacted widespread vaccination, but strategies have been identified to combat vaccine safety and efficacy misinformation and promote immunization.


Assuntos
Alphapapillomavirus/fisiologia , Infecções por Papillomavirus/imunologia , Vacinas contra Papillomavirus/imunologia , Neoplasias do Colo do Útero/prevenção & controle , Autoimunidade , Feminino , Humanos , Infecções por Papillomavirus/complicações , Vacinas contra Papillomavirus/efeitos adversos , Saúde Pública , Neoplasias do Colo do Útero/etiologia , Vacinação , Hesitação Vacinal
15.
Am J Reprod Immunol ; 86(1): e13394, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33501727

RESUMO

PROBLEM: Cervical cancer screening strategies in the United States include cotesting (human papillomavirus (HPV) with cytology), primary HPV with genotyping and reflex cytology, and cytology alone. An ongoing challenge is the appropriate triage of patients to colposcopy to those at highest risk. We investigated whether incorporation of p16INK4a immunodetection by enzyme-linked immunosorbent assay (ELISA) on fresh cervical samples obtained at the time of screening could improve appropriate referral to colposcopy. METHOD OF STUDY: A derivation group comprised of cervical swabs collected from subjects with high-grade dysplasia or cancer (positive control) and from subjects with negative screening history (negative control). Samples collected from colposcopy were used to evaluate the existing screening strategies individually and with incorporation of p16INK4a ELISA. Histology was used as the gold standard. RESULTS: Among 163 subjects recruited, 138 were included. In the derivation group, mean p16INK4a level was 2.86 ng/mL (n = 31) and 0.58 ng/mL (n = 20) among positive and negative controls respectively (p = 0.002) with an area under the receiver operator characteristic curve of 0.79 (p < 0.001). Among colposcopy subjects, sensitivity/specificity for cotesting, primary HPV, and cytology were 94%/42%, 88%/45%, and 88%/49%, respectively. Incorporation of p16INK4a resulted in similar sensitivity and improved specificity (cotesting+p16 88%/58%, primary HPV+p16 88%/57%, cytology+p16 81%/62%; p = 0.23/p = 0.008) with decrease in colposcopy referrals by 15% to 22% (p = 0.01). CONCLUSIONS: These results demonstrate the feasibility of quantifying p16INK4a by ELISA in fresh cervical samples, and its potential as an adjunct to existing screening strategies in the identification of high grade-dysplasia while reducing the number of colposcopic referrals.


Assuntos
Alphapapillomavirus/fisiologia , Colo do Útero/metabolismo , Inibidor p16 de Quinase Dependente de Ciclina/metabolismo , Detecção Precoce de Câncer/métodos , Infecções por Papillomavirus/diagnóstico , Neoplasias do Colo do Útero/diagnóstico , Adulto , Biomarcadores , Colo do Útero/patologia , Estudos de Coortes , Colposcopia , Inibidor p16 de Quinase Dependente de Ciclina/genética , Ensaio de Imunoadsorção Enzimática , Estudos de Viabilidade , Feminino , Células HeLa , Humanos , Pessoa de Meia-Idade , Estudos Prospectivos , Encaminhamento e Consulta , Sensibilidade e Especificidade , Triagem
16.
J Gen Virol ; 102(3)2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33427604

RESUMO

Persistent infection with high-risk human papillomaviruses (HR-HPVs) is the causal factor in over 99 % of cervical cancer cases, and a significant proportion of oropharyngeal and anogenital cancers. The key drivers of HPV-mediated transformation are the oncoproteins E5, E6 and E7. Together, they act to prolong cell-cycle progression, delay differentiation and inhibit apoptosis in the host keratinocyte cell in order to generate an environment permissive for viral replication. The oncoproteins also have key roles in mediating evasion of the host immune response, enabling infection to persist. Moreover, prolonged infection within the cellular environment established by the HR-HPV oncoproteins can lead to the acquisition of host genetic mutations, eventually culminating in transformation to malignancy. In this review, we outline the many ways in which the HR-HPV oncoproteins manipulate the host cellular environment, focusing on how these activities can contribute to carcinogenesis.


Assuntos
Alphapapillomavirus/fisiologia , Transformação Celular Viral , Proteínas Oncogênicas Virais/metabolismo , Infecções por Papillomavirus/virologia , Alphapapillomavirus/genética , Alphapapillomavirus/patogenicidade , Apoptose , Carcinogênese , Pontos de Checagem do Ciclo Celular , Diferenciação Celular , Proliferação de Células , Reprogramação Celular , Epigênese Genética , Genoma Viral , Humanos , Evasão da Resposta Imune , Proteínas Oncogênicas Virais/genética , Domínios PDZ , RNA não Traduzido/genética , Transdução de Sinais , Replicação Viral
17.
EBioMedicine ; 63: 103165, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33422988

RESUMO

BACKGROUND: Recent publications from a single research group have suggested that aldehyde-based high-level disinfectants (HLDs), such as ortho-phthalaldehyde (OPA), are not effective at inactivating HPVs and that therefore, patients may be at risk of HPV infection from medical devices. These results could have significant public health consequences and therefore necessitated evaluation of their reproducibility and clinical relevance. METHODS: We developed methods and used standardised controls to: (1) quantify the infectious levels of clinically-sourced HPVs from patient lesions and compare them to laboratory-derived HPVs, (2) evaluate experimental factors that should be controlled to ensure consistent and reproducible infectivity measurements of different HPV genotypes, and (3) determine the efficacy of select HLDs. FINDINGS: A novel focus forming unit (FFU) infectivity assay demonstrated that exfoliates from patient anogenital lesions and respiratory papillomas yielded infectious HPV burdens up to 2.7 × 103 FFU; therefore, using 2.2 × 102 to 1.0 × 104 FFU of laboratory-derived HPVs in disinfection assays provides a relevant range for clinical exposures. RNase and neutralising antibody sensitivities were used to ensure valid infectivity measures of tissue-derived and recombinant HPV preparations. HPV infectivity was demonstrated over a dynamic range of 4-5 log10; and disinfection with OPA and hypochlorite was achieved over 3 to >4 log10 with multiple genotypes of tissue-derived and recombinant HPV isolates. INTERPRETATION: This work, along with a companion publication from an independent lab in this issue, address a major public health question by showing that HPVs are susceptible to HLDs. FUNDING: Advanced Sterilization Products; US NIH (R01CA207368, U19AI084081, P30CA118100).


Assuntos
Alphapapillomavirus/efeitos dos fármacos , Alphapapillomavirus/fisiologia , Desinfetantes/farmacologia , Infecções por Papillomavirus/virologia , Carga Viral , Alphapapillomavirus/classificação , Alphapapillomavirus/genética , Anticorpos Neutralizantes/imunologia , Anticorpos Antivirais/imunologia , Linhagem Celular , Células Cultivadas , Desinfecção/métodos , Feminino , Genoma Viral , Genótipo , Humanos , Masculino , Testes de Neutralização
18.
Int J Cancer ; 148(8): 1850-1857, 2021 04 15.
Artigo em Inglês | MEDLINE | ID: mdl-33070318

RESUMO

Attendance at early recall and colposcopy is crucial to attaining the benefits of primary high-risk human papillomavirus (HR-HPV)-based screening. Within the English HPV pilot, we analysed deprivation- and age-related patterns of attendance at colposcopy and 12- and 24-month early recall of HR-HPV positive women screened in 2013 to 2015 (N = 36 466). We fitted logistic regression models for adjusted odds ratios (OR). Despite high overall attendance, area deprivation had a small but significant impact at both early recalls, for example, attendance at 24 months was 86.3% and 83.0% in less vs more deprived areas, respectively (ORadj : 0.76; 95% CI: 0.67-0.87). Older women (≥30 years) were more likely to attend early recall than younger women (<30 years), for example, attendance at 24 months was 86.1% vs 82.3%, respectively (ORadj : 1.32, 95% CI: 1.16-1.51). Most women attended colposcopy following a baseline referral, with 96.9% attendance among more deprived and 97.8% among less deprived areas (ORadj : 0.70; 95% CI: 0.55-0.88). Differences in colposcopy attendance by deprivation level at 12 and 24 months were of approximately the same magnitude. In conclusion, attendance at early recall and colposcopy was reassuringly high. Although there were statistically significant differences by deprivation and age group, these were small in absolute terms.


Assuntos
Colposcopia/estatística & dados numéricos , Detecção Precoce de Câncer/estatística & dados numéricos , Programas de Rastreamento/estatística & dados numéricos , Infecções por Papillomavirus/diagnóstico , Displasia do Colo do Útero/diagnóstico , Neoplasias do Colo do Útero/diagnóstico , Adulto , Fatores Etários , Alphapapillomavirus/fisiologia , Colo do Útero/virologia , Colposcopia/métodos , Detecção Precoce de Câncer/métodos , Feminino , Humanos , Programas de Rastreamento/métodos , Pessoa de Meia-Idade , Infecções por Papillomavirus/virologia , Projetos Piloto , Encaminhamento e Consulta/estatística & dados numéricos , Neoplasias do Colo do Útero/virologia , Esfregaço Vaginal/métodos , Esfregaço Vaginal/estatística & dados numéricos , Adulto Jovem , Displasia do Colo do Útero/virologia
19.
Cancer Immunol Immunother ; 70(5): 1227-1237, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33125511

RESUMO

Approximately 15% of advanced head and neck squamous cell carcinomas (HNSCC) respond to anti-PD-(L)1 monotherapies. Tumor PD-L1 expression and human papillomavirus (HPV) status have been proposed as biomarkers to identify patients likely to benefit from these treatments. We aimed to understand the potential immune effects of HPV in HNSCC and to characterize additional potentially targetable immune-regulatory pathways in primary, treatment-naïve tumors. CD3, CD4, CD8, CD20, CD68, FoxP3, PD-1, PD-L2, LAG-3, IDO-1, and GITR cell densities were determined in 27 HNSCC specimens. IHC for PD-L1 assessed percentage of positive tumor cells and immune cells separately or as a combined positive score (CPS), and whether PD-L1 was expressed in an adaptive or constitutive pattern (i.e., PD-L1+ tumor cells juxtaposed to TILs or in the absence of TILs, respectively). HPV testing with p16 IHC was confirmed by HPV genotyping. When compared to HPV(-) tumors (n = 14), HPV+ tumors (n = 13) contained significantly higher densities of CD3+, CD4+, CD8+, CD20+, and PD-1+ cells (P < 0.02), and there was a trend towards increased density of FoxP3 + cells. PD-L1 expression patterns did not vary by tumor viral status, suggesting possible heterogeneous mechanisms driving constitutive vs adaptive PD-L1 expression patterns in HNSCC. IDO-1 expression was abundant (> 500 IDO-1+ cells/mm2 in 17/27 specimens) and was found on tumor cells as well as immune cells in 12/27 (44%) cases (range 5-80% tumor cells+). Notably, the studied markers varied on a per-patient basis and were not always related to the degree of T cell infiltration. These findings may inform therapeutic co-targeting strategies and raise consideration for a personalized treatment approach.


Assuntos
Alphapapillomavirus/fisiologia , Neoplasias de Cabeça e Pescoço/imunologia , Infecções por Papillomavirus/imunologia , Carcinoma de Células Escamosas de Cabeça e Pescoço/imunologia , Linfócitos T/imunologia , Adulto , Idoso , Antígeno B7-H1/genética , Antígeno B7-H1/metabolismo , Biomarcadores Tumorais/metabolismo , Estudos de Coortes , Feminino , Fatores de Transcrição Forkhead/genética , Fatores de Transcrição Forkhead/metabolismo , Regulação Neoplásica da Expressão Gênica , Neoplasias de Cabeça e Pescoço/virologia , Humanos , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Infecções por Papillomavirus/virologia , Receptor de Morte Celular Programada 1/genética , Receptor de Morte Celular Programada 1/metabolismo , Carcinoma de Células Escamosas de Cabeça e Pescoço/virologia , Transcriptoma , Microambiente Tumoral
20.
Int J Cancer ; 148(2): 277-284, 2021 01 15.
Artigo em Inglês | MEDLINE | ID: mdl-32638362

RESUMO

The age-standardised incidence of cervical cancer in Europe varies widely by country (between 3 and 25/100000 women-years) in 2018. Human papillomavirus (HPV) vaccine coverage is low in countries with the highest incidence and screening performance is heterogeneous among European countries. A broad group of delegates of scientific professional societies and cancer organisations endorse the principles of the WHO call to eliminate cervical cancer as a public health problem, also in Europe. All European nations should, by 2030, reach at least 90% HPV vaccine coverage among girls by the age of 15 years and also boys, if cost-effective; they should introduce organised population-based HPV-based screening and achieve 70% of screening coverage in the target age group, providing also HPV testing on self-samples for nonscreened or underscreened women; and to manage 90% of screen-positive women. To guide member states, a group of scientific professional societies and cancer organisations engage to assist in the rollout of a series of concerted evidence-based actions. European health authorities are requested to mandate a group of experts to develop the third edition of European Guidelines for Quality Assurance of Cervical Cancer prevention based on integrated HPV vaccination and screening and to monitor the progress towards the elimination goal. The occurrence of the COVID-19 pandemic, having interrupted prevention activities temporarily, should not deviate stakeholders from this ambition. In the immediate postepidemic phase, health professionals should focus on high-risk women and adhere to cost-effective policies including self-sampling.


Assuntos
Alphapapillomavirus/imunologia , Infecções por Papillomavirus/imunologia , Vacinas contra Papillomavirus/imunologia , Saúde Pública/métodos , Neoplasias do Colo do Útero/prevenção & controle , Adolescente , Adulto , Alphapapillomavirus/fisiologia , COVID-19/epidemiologia , COVID-19/prevenção & controle , COVID-19/virologia , Detecção Precoce de Câncer , Europa (Continente) , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Pandemias , Infecções por Papillomavirus/prevenção & controle , Infecções por Papillomavirus/virologia , Vacinas contra Papillomavirus/administração & dosagem , Saúde Pública/normas , Saúde Pública/estatística & dados numéricos , SARS-CoV-2/fisiologia , Neoplasias do Colo do Útero/diagnóstico , Neoplasias do Colo do Útero/imunologia , Vacinação/métodos , Organização Mundial da Saúde , Adulto Jovem
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