1
|
Khelil M, Griffin H, Bleeker MCG, Steenbergen RDM, Zheng K, Saunders-Wood T, Samuels S, Rotman J, Vos W, van den Akker BE, de Menezes RX, Kenter GG, Doorbar J, Jordanova ES. Delta-Like Ligand-Notch1 Signaling Is Selectively Modulated by HPV16 E6 to Promote Squamous Cell Proliferation and Correlates with Cervical Cancer Prognosis. Cancer Res 2021; 81:1909-1921. [PMID: 33500246 DOI: 10.1158/0008-5472.can-20-1996] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 11/25/2020] [Accepted: 01/20/2021] [Indexed: 11/16/2022]
Abstract
Human papillomavirus (HPV) drives high-grade intraepithelial neoplasia and cancer; for unknown reasons, this occurs most often in the cervical transformation zone. Either mutation or HPV E6-driven inhibition of Notch1 can drive neoplastic development in stratified squamous epithelia. However, the contribution of Notch1 and its Delta-like ligands (DLL) to site susceptibility remains poorly understood. Here, we map DLL1/DLL4 expression in cell populations present in normal cervical biopsies by immunofluorescence. In vitro keratinocyte 2D monolayer models, growth assays, and organotypic raft cultures were used to assess the functional role of DLL-Notch signaling in uninfected cells and its modulation by HPV16 in neoplasia. An RNA sequencing-based gene signature was used to suggest the cell of origin of 279 HPV-positive cervical carcinomas from The Cancer Genome Atlas and to relate this to disease prognosis. Finally, the prognostic impact of DLL4 expression was investigated in three independent cervical cancer patient cohorts. Three molecular cervical carcinoma subtypes were identified, with reserve cell tumors the most common and linked to relatively good prognosis. Reserve cells were characterized as DLL1-/DLL4+, a proliferative phenotype that is temporarily observed during squamous metaplasia and wound healing but appears to be sustained by HPV16 E6 in raft models of low-grade and, more prominently, high-grade neoplasia. High expression of DLL4 was associated with an increased likelihood of cervical cancer-associated death and recurrence. Taken together, DLL4-Notch1 signaling reflects a proliferative cellular state transiently present during physiologic processes but inherent to cervical reserve cells, making them strongly resemble neoplastic tissue even before HPV infection has occurred. SIGNIFICANCE: This study investigates cervical cancer cell-of-origin populations and describes a DLL-Notch1 phenotype that is associated with disease prognosis and that might help identify cells that are susceptible to HPV-induced carcinogenesis.
Collapse
Affiliation(s)
- Maryam Khelil
- Centre for Gynaecological Oncology Amsterdam (CGOA): Amsterdam UMC and The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital (NKI-AvL), Amsterdam, the Netherlands
| | - Heather Griffin
- Department of Pathology, University of Cambridge, Cambridge, United Kingdom
| | - Maaike C G Bleeker
- Amsterdam UMC, Vrije Universiteit Amsterdam, Pathology, Cancer Center Amsterdam (CCA), Amsterdam, the Netherlands
| | - Renske D M Steenbergen
- Amsterdam UMC, Vrije Universiteit Amsterdam, Pathology, Cancer Center Amsterdam (CCA), Amsterdam, the Netherlands
| | - Ke Zheng
- Department of Pathology, University of Cambridge, Cambridge, United Kingdom
| | | | - Sanne Samuels
- Centre for Gynaecological Oncology Amsterdam (CGOA): Amsterdam UMC and The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital (NKI-AvL), Amsterdam, the Netherlands
| | - Jossie Rotman
- Centre for Gynaecological Oncology Amsterdam (CGOA): Amsterdam UMC and The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital (NKI-AvL), Amsterdam, the Netherlands
| | - Wim Vos
- Amsterdam UMC, Vrije Universiteit Amsterdam, Pathology, Cancer Center Amsterdam (CCA), Amsterdam, the Netherlands
| | | | - Renée X de Menezes
- Amsterdam UMC, Vrije Universiteit Amsterdam, Epidemiology and Biostatistics, Amsterdam, the Netherlands
| | - Gemma G Kenter
- Centre for Gynaecological Oncology Amsterdam (CGOA): Amsterdam UMC and The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital (NKI-AvL), Amsterdam, the Netherlands
| | - John Doorbar
- Department of Pathology, University of Cambridge, Cambridge, United Kingdom
| | - Ekaterina S Jordanova
- Centre for Gynaecological Oncology Amsterdam (CGOA): Amsterdam UMC and The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital (NKI-AvL), Amsterdam, the Netherlands.
- Department of Pathology, Leiden University Medical Center, Leiden, the Netherlands
| |
Collapse
|
2
|
Rojo-León V, García C, Valencia C, Méndez MA, Wood C, Covarrubias L. The E6/E7 oncogenes of human papilloma virus and estradiol regulate hedgehog signaling activity in a murine model of cervical cancer. Exp Cell Res 2019; 381:311-322. [PMID: 31125556 DOI: 10.1016/j.yexcr.2019.05.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 04/25/2019] [Accepted: 05/19/2019] [Indexed: 01/06/2023]
Abstract
Human papilloma virus oncogenes and estradiol are major etiologic factors associated with cervical cancer. In order to understand the mechanism by which these two factors promote carcinogenesis, the role of the Hedgehog (Hh) signaling pathway was evaluated during the normal growth of cervical epithelium and in the presence of E6/E7 oncogenes and exogenous estradiol. Hh signaling activity was determined in live animals (i.e., Gli-Luc reporter levels) during the estrous cycle and was found to be higher in the cervical area during the major growth phases, proestrus-estrus, in comparison to the diestrus phase. The same pattern was observed in transgenic mice expressing the E6/E7 oncogenes, though with notably higher levels than in control mice. Adding estradiol also markedly increased Gli activity in the cervix and the skin. In agreement with the correlation between high bioluminescence and tissue growth in different context, cervical cell proliferation was reduced upon Hh signaling inhibition in mice. Treatment with itraconazole, a putative novel Hh inhibitor, at an early stage of cervical carcinogenesis, did not decrease Hh signaling but it did reduce growth. Therefore, Hh signaling likely contributes to cervical carcinogenesis and itraconazole is effective to reduce growth but by a mechanism involving additional signaling pathways.
Collapse
Affiliation(s)
- Verónica Rojo-León
- Department of Developmental Genetics and Molecular Physiology, Instituto de Biotecnología, Universidad Nacional Autónoma de México. Av. Universidad 2001, Cuernavaca Morelos, 62210, México.
| | - Celina García
- Department of Developmental Genetics and Molecular Physiology, Instituto de Biotecnología, Universidad Nacional Autónoma de México. Av. Universidad 2001, Cuernavaca Morelos, 62210, México.
| | - Concepción Valencia
- Department of Developmental Genetics and Molecular Physiology, Instituto de Biotecnología, Universidad Nacional Autónoma de México. Av. Universidad 2001, Cuernavaca Morelos, 62210, México.
| | - Marco-Antonio Méndez
- Department of Developmental Genetics and Molecular Physiology, Instituto de Biotecnología, Universidad Nacional Autónoma de México. Av. Universidad 2001, Cuernavaca Morelos, 62210, México.
| | - Christopher Wood
- Department of Developmental Genetics and Molecular Physiology, Instituto de Biotecnología, Universidad Nacional Autónoma de México. Av. Universidad 2001, Cuernavaca Morelos, 62210, México.
| | - Luis Covarrubias
- Department of Developmental Genetics and Molecular Physiology, Instituto de Biotecnología, Universidad Nacional Autónoma de México. Av. Universidad 2001, Cuernavaca Morelos, 62210, México.
| |
Collapse
|
3
|
Liu Z, Yu D, Xu J, Li X, Wang X, He Z, Zhao T. Human umbilical cord mesenchymal stem cells improve irradiation-induced skin ulcers healing of rat models. Biomed Pharmacother 2018. [PMID: 29524881 DOI: 10.1016/j.biopha.2018.02.093] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Irradiation-induced skin ulcers can be resultant from nuclear accident or reaction to radiation therapy of tumor and is intractable for healing. Human umbilical cord mesenchymal stem cells (hUC-MSCs) have been considered to be the potential therapeutic tools for tissue regeneration. However, the underlying mechanisms are still not well understood. This study aims to investigate the effects of hUC-MSCs on irradiation-induced skin ulcers healing and the related mechanisms. The ulcers were induced by irradiating the skin of adult SD rats. The ulcers of SD rats were treated with vehicle or hUC-MSCs donated from mother giving birth. The ulcer healing was measured by imaging the healing rate and the H&E staining. CD31 and VEGF expression was measured with immunohistochemistry assay. iTRAQ proteomics analysis was used to analyze the signaling pathway. The results showed that hUC-MSCs improved healing of irradiation-induced skin ulcers in vivo using a rat model of skin ulcer. Transplantation of hUC-MSCs promoted keratin generation and keratinocytes proliferation of ulcer areas. Furthermore, the results demonstrated that hUC-MSCs increased expression of CD31 and VEGF in ulcers and promoted neovascularization. iTRAQ proteomics analysis results indicated that PI3K/Akt signaling pathway involved in hUC-MSCs-mediated repairing of irradiation-induced skin ulcer. In conclusion, human umbilical cord mesenchymal stem cells promoted neovascularization and re-epithelization, and improved healing of irradiation-induced skin ulcers. This healing improvement may be conducted through activating the PI3K/Akt signaling pathway, however, which needs to be proven by the further investigations.
Collapse
Affiliation(s)
- Zhongshan Liu
- Department of Plastic, The Second Affiliated Hospital of Soochow University, Suzhou, China; Department of the Burns and Plastic, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Daojiang Yu
- Department of Plastic, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Jianwei Xu
- The Stem Cell and Tissue Engineering Research Center, Guizhou Medical University, China
| | - Xiujie Li
- Department of Plastic, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Xianyao Wang
- Department of Cell Biology, Jiangsu Key Laboratory of Stem Cell Research, Suzhou, China
| | - Zhixu He
- The Stem Cell and Tissue Engineering Research Center, Guizhou Medical University, China.
| | - Tianlan Zhao
- Department of Plastic, The Second Affiliated Hospital of Soochow University, Suzhou, China.
| |
Collapse
|
4
|
Spurgeon ME, den Boon JA, Horswill M, Barthakur S, Forouzan O, Rader JS, Beebe DJ, Roopra A, Ahlquist P, Lambert PF. Human papillomavirus oncogenes reprogram the cervical cancer microenvironment independently of and synergistically with estrogen. Proc Natl Acad Sci U S A 2017; 114:E9076-E9085. [PMID: 29073104 PMCID: PMC5664542 DOI: 10.1073/pnas.1712018114] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
High-risk human papillomaviruses (HPVs) infect epithelial cells and are causally associated with cervical cancer, but HPV infection is not sufficient for carcinogenesis. Previously, we reported that estrogen signaling in the stromal tumor microenvironment is associated with cervical cancer maintenance and progression. We have now determined how HPV oncogenes and estrogen treatment affect genome-wide host gene expression in laser-captured regions of the cervical epithelium and stroma of untreated or estrogen-treated nontransgenic and HPV-transgenic mice. HPV oncogene expression in the cervical epithelium elicited significant gene-expression changes in the proximal stromal compartment, and estrogen treatment uniquely affected gene expression in the cervical microenvironment of HPV-transgenic mice compared with nontransgenic mice. Several potential estrogen-induced paracrine-acting factors were identified in the expression profile of the cervical tumor microenvironment. The microenvironment of estrogen-treated HPV-transgenic mice was significantly enriched for chemokine/cytokine activity and inflammatory and immune functions associated with carcinogenesis. This inflammatory signature included several proangiogenic CXCR2 receptor ligands. A subset of the same CXCR2 ligands was likewise increased in cocultures of early-passage cells from human cervical samples, with levels highest in cocultures of cervical fibroblasts and cancer-derived epithelial cells. Our studies demonstrate that high-risk HPV oncogenes profoundly reprogram the tumor microenvironment independently of and synergistically with estrogen. These observations illuminate important means by which HPVs can cause cancer through alterations in the tumor microenvironment.
Collapse
Affiliation(s)
- Megan E Spurgeon
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison, Madison, WI 53706
| | - Johan A den Boon
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison, Madison, WI 53706
- Morgridge Institute for Research, Madison, WI 53715
| | - Mark Horswill
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison, Madison, WI 53706
- Morgridge Institute for Research, Madison, WI 53715
| | - Sonalee Barthakur
- Department of Physiology, University of Wisconsin-Madison, Madison, WI 53706
| | | | - Janet S Rader
- Department of Obstetrics and Gynecology, Medical College of Wisconsin, Milwaukee, WI 53226
| | - David J Beebe
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI 53706
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53706
| | - Avtar Roopra
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI 53706
- Department of Neuroscience, University of Wisconsin-Madison, Madison, WI 53706
| | - Paul Ahlquist
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison, Madison, WI 53706;
- Morgridge Institute for Research, Madison, WI 53715
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI 53706
- Howard Hughes Medical Institute, University of Wisconsin-Madison, Madison, WI 53706
| | - Paul F Lambert
- McArdle Laboratory for Cancer Research, Department of Oncology, University of Wisconsin-Madison, Madison, WI 53706;
- Carbone Cancer Center, University of Wisconsin-Madison, Madison, WI 53706
| |
Collapse
|
5
|
E6/E7 oncogenes in epithelial suprabasal layers and estradiol promote cervical growth and ear regeneration. Oncogenesis 2017; 6:e374. [PMID: 28846079 PMCID: PMC5608921 DOI: 10.1038/oncsis.2017.73] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 06/10/2017] [Accepted: 07/17/2017] [Indexed: 02/06/2023] Open
Abstract
Tissue growth is a common characteristic of carcinogenesis and regeneration. Here we show that suprabasal expression of human papillomavirus (HPV)16 E6/E7 oncogenes in Tg(K6b-E6/E7) mice, similar to that observed in HPV-infected human tissue, and estradiol increased cervical epithelium growth and ear-hole closure efficiency. Oncogenes in combination with estradiol had a significant contribution to the proliferation of suprabasal cells of cervical epithelium that correlated with an increased expression of keratin genes. Remarkably, long-term treatments with estradiol resulted in evident cellular and tissue abnormalities indicative of a precancerous phenotype. Regenerating ear epithelium of transgenic mice also showed increased suprabasal cell proliferation and expression of keratin genes. Unexpectedly, we observed higher ear regeneration efficiency in adult than in young female mice, which was further increased by E6/E7 oncogenes. Supporting a role of estradiol in this phenomenon, ovariectomy and treatment with an estrogen receptor inhibitor caused a significant reduction in regenerative capacity. Our data suggest that Tg(K6b-E6/E7) mice are unique to mimic the initial stages of HPV-mediated cervical carcinogenesis, and ear regeneration could facilitate the elucidation of mechanisms involved.
Collapse
|
6
|
Schiffman M, Doorbar J, Wentzensen N, de Sanjosé S, Fakhry C, Monk BJ, Stanley MA, Franceschi S. Carcinogenic human papillomavirus infection. Nat Rev Dis Primers 2016; 2:16086. [PMID: 27905473 DOI: 10.1038/nrdp.2016.86] [Citation(s) in RCA: 540] [Impact Index Per Article: 67.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Infections with human papillomavirus (HPV) are common and transmitted by direct contact. Although the great majority of infections resolve within 2 years, 13 phylogenetically related, sexually transmitted HPV genotypes, notably HPV16, cause - if not controlled immunologically or by screening - virtually all cervical cancers worldwide, a large fraction of other anogenital cancers and an increasing proportion of oropharyngeal cancers. The carcinogenicity of these HPV types results primarily from the activity of the oncoproteins E6 and E7, which impair growth regulatory pathways. Persistent high-risk HPVs can transition from a productive (virion-producing) to an abortive or transforming infection, after which cancer can result after typically slow accumulation of host genetic mutations. However, which precancerous lesions progress and which do not is unclear; the majority of screening-detected precancers are treated, leading to overtreatment. The discovery of HPV as a carcinogen led to the development of effective preventive vaccines and sensitive HPV DNA and RNA tests. Together, vaccination programmes (the ultimate long-term preventive strategy) and screening using HPV tests could dramatically alter the landscape of HPV-related cancers. HPV testing will probably replace cytology-based cervical screening owing to greater reassurance when the test is negative. However, the effective implementation of HPV vaccination and screening globally remains a challenge.
Collapse
Affiliation(s)
- Mark Schiffman
- National Cancer Institute, Division of Cancer Epidemiology and Genetics, Room 6E544, 9609 Medical Center Drive, Rockville, Maryland 20850, USA
| | - John Doorbar
- Department of Pathology, University of Cambridge, Cambridge, UK
| | - Nicolas Wentzensen
- National Cancer Institute, Division of Cancer Epidemiology and Genetics, Room 6E544, 9609 Medical Center Drive, Rockville, Maryland 20850, USA
| | - Silvia de Sanjosé
- Catalan Institute of Oncology, IDIBELL, Cancer Epidemiology Research Programme and CIBER Epidemiologia Y Salud Publica, Barcelona, Spain
| | - Carole Fakhry
- Department of Otolaryngology, Johns Hopkins Medicine, Baltimore, Maryland, USA
| | - Bradley J Monk
- Division of Gynecologic Oncology, US Oncology Network, University of Arizona-Phoenix, Phoenix, Arizona, USA
| | | | - Silvia Franceschi
- International Agency for Research on Cancer, Infections and Cancer Epidemiology Group, Lyon, France
| |
Collapse
|
7
|
Doorbar J, Egawa N, Griffin H, Kranjec C, Murakami I. Human papillomavirus molecular biology and disease association. Rev Med Virol 2015; 25 Suppl 1:2-23. [PMID: 25752814 PMCID: PMC5024016 DOI: 10.1002/rmv.1822] [Citation(s) in RCA: 524] [Impact Index Per Article: 58.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 06/12/2014] [Accepted: 06/25/2014] [Indexed: 12/27/2022]
Abstract
Human papillomaviruses (HPVs) have evolved over millions of years to propagate themselves in a range of different animal species including humans. Viruses that have co‐evolved slowly in this way typically cause chronic inapparent infections, with virion production in the absence of apparent disease. This is the case for many Beta and Gamma HPV types. The Alpha papillomavirus types have however evolved immunoevasion strategies that allow them to cause persistent visible papillomas. These viruses activate the cell cycle as the infected epithelial cell differentiates in order to create a replication competent environment that allows viral genome amplification and packaging into infectious particles. This is mediated by the viral E6, E7, and E5 proteins. High‐risk E6 and E7 proteins differ from their low‐risk counterparts however in being able to drive cell cycle entry in the upper epithelial layers and also to stimulate cell proliferation in the basal and parabasal layers. Deregulated expression of these cell cycle regulators underlies neoplasia and the eventual progression to cancer in individuals who cannot resolve high‐risk HPV infection. Most work to date has focused on the study of high‐risk HPV types such as HPV 16 and 18, which has led to an understanding of the molecular pathways subverted by these viruses. Such approaches will lead to the development of better strategies for disease treatment, including targeted antivirals and immunotherapeutics. Priorities are now focused toward understanding HPV neoplasias at sites other than the cervix (e.g. tonsils, other transformation zones) and toward understanding the mechanisms by which low‐risk HPV types can sometimes give rise to papillomatosis and under certain situations even cancers. Copyright © 2015 John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
- John Doorbar
- Department of Pathology, University of Cambridge, Cambridge, UK
| | | | | | | | | |
Collapse
|
8
|
|
9
|
Doorbar J, Quint W, Banks L, Bravo IG, Stoler M, Broker TR, Stanley MA. The biology and life-cycle of human papillomaviruses. Vaccine 2012; 30 Suppl 5:F55-70. [PMID: 23199966 DOI: 10.1016/j.vaccine.2012.06.083] [Citation(s) in RCA: 878] [Impact Index Per Article: 73.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 06/04/2012] [Accepted: 06/05/2012] [Indexed: 12/20/2022]
Abstract
Human papillomaviruses (HPVs) comprise a diverse group, and have different epithelial tropisms and life-cycle strategies. Many HPVs are classified as low-risk, as they are only very rarely associated with neoplasia or cancer in the general population. These HPVs typically cause inapparent/inconspicuous infections, or benign papillomas, which can persist for months or years, but which are eventually resolved by the host's immune system. Low-risk HPVs are difficult to manage in immunosuppressed people and in individuals with genetic predispositions, and can give rise to papillomatosis, and in rare instances, to cancer. The high-risk HPV types are, by contrast, a cause of several important human cancers, including almost all cases of cervical cancer, a large proportion of other anogenital cancers and a growing number of head and neck tumours. The high-risk HPV types constitute a subset of the genus Alphapapillomavirus that are prevalent in the general population, and in most individuals cause only inconspicuous oral and genital lesions. Cancer progression is associated with persistent high-risk HPV infection and with deregulated viral gene expression, which leads to excessive cell proliferation, deficient DNA repair, and the accumulation of genetic damage in the infected cell. Although their life-cycle organisation is broadly similar to that of the low-risk HPV types, the two groups differ significantly in their capacity to drive cell cycle entry and cell proliferation in the basal/parabasal cell layers. This is thought to be linked, at least in part, to different abilities of the high- and low-risk E6 proteins to modulate the activity of p53 and PDZ-domain proteins, and the differential ability of the E7 proteins to target the several different members of the retinoblastoma protein family. This article forms part of a special supplement entitled "Comprehensive Control of HPV Infections and Related Diseases" Vaccine Volume 30, Supplement 5, 2012.
Collapse
Affiliation(s)
- John Doorbar
- Division of Virology, National Institute for Medical Research, London, United Kingdom.
| | | | | | | | | | | | | |
Collapse
|
10
|
RXRα deletion and E6E7 oncogene expression are sufficient to induce cervical malignant lesions in vivo. Cancer Lett 2012; 317:226-36. [DOI: 10.1016/j.canlet.2011.11.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 11/23/2011] [Accepted: 11/23/2011] [Indexed: 01/01/2023]
|
11
|
Regeneration of Hair Follicles Is Modulated by Flightless I (Flii) in a Rodent Vibrissa Model. J Invest Dermatol 2011; 131:838-47. [DOI: 10.1038/jid.2010.393] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
12
|
Liu X, Lee PY, Ho CM, Lui V, Chen Y, Che CM, Tam P, Wong K. Silver Nanoparticles Mediate Differential Responses in Keratinocytes and Fibroblasts during Skin Wound Healing. ChemMedChem 2010; 5:468-75. [DOI: 10.1002/cmdc.200900502] [Citation(s) in RCA: 194] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
13
|
Induction of focal epithelial hyperplasia in tongue of young bk6-E6/E7 HPV16 transgenic mice. Transgenic Res 2009; 18:513-27. [PMID: 19165615 DOI: 10.1007/s11248-009-9243-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2008] [Accepted: 01/04/2009] [Indexed: 10/21/2022]
Abstract
Squamous cell carcinoma (SCC) of the oral cavity is one of the most common neoplasms in the world. During the past 2 decades, the role of high-risk human papilloma virus (HR-HPV) has been studied and the data supporting HPV as a one of the causative agents in the development and progression of a sub-set of head and neck squamous cell carcinomas (HNSCC) has accumulated. In order to investigate the role of HR-HPV oncogene expression in early epithelial alterations in vivo, we produced transgenic mice expressing HPV16 early region genes from the promoter of the bovine keratin 6 gene (Tg[bK6-E6/E7]). In this article, we demonstrate that E6/E7 transgene was abundantly expressed and cellular proliferation was increased in the middle tongue epithelia of transgenic mice, and that in the same region young (27 weeks old) Tg[bK6-E6/E7] mice spontaneously developed histological alterations, mainly focal epithelial hyperplasia (FEH).
Collapse
|