Role of High-Risk Human Papillomaviruses in Breast Carcinogenesis

2014 ◽  
pp. 243-260 ◽  
Author(s):  
Ala-Eddin Al Moustafa
Keyword(s):  
High Risk ◽  
Human Papillomaviruses ◽  
Breast Carcinogenesis

scholarly journals Human Papillomavirus in Breast Carcinogenesis: A Passenger, a Cofactor, or a Causal Agent?

Biology ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 804
Author(s):  
Rancés Blanco ◽  
Diego Carrillo-Beltrán ◽  
Juan P. Muñoz ◽  
Alejandro H. Corvalán ◽  
Gloria M. Calaf ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Risk Factor ◽  
Human Papillomavirus ◽  
High Risk ◽  
Experimental Evidence ◽  
Potential Risk ◽  
Hpv Infection ◽  
Breast Carcinogenesis ◽  
Tumor Tissues

Breast cancer (BC) is the most commonly diagnosed malignancy in women worldwide as well as the leading cause of cancer-related death in this gender. Studies have identified that human papillomavirus (HPV) is a potential risk factor for BC development. While vaccines that protect against oncogenic HPVs infection have been commercially available, global disparities persist due to their high cost. Interestingly, numerous authors have detected an increased high risk (HR)-HPV infection in BC specimens when compared with non-tumor tissues. Therefore, it was suggested that HR-HPV infection could play a role in breast carcinogenesis in a subset of cases. Additional epidemiological and experimental evidence is still needed regarding the role of HR-HPV infection in the development and progression of BC.

scholarly journals Human Papillomaviruses and Epstein–Barr Virus Interactions in Colorectal Cancer: A Brief Review

Pathogens ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 300 ◽  
Author(s):  
Queenie Fernandes ◽  
Ishita Gupta ◽  
Semir Vranic ◽  
Ala-Eddin Al Moustafa
Keyword(s):  
Colorectal Cancer ◽  
High Risk ◽  
Cancer Progression ◽  
Epstein Barr Virus ◽  
Human Papillomaviruses ◽  
Colorectal Carcinogenesis ◽  
Mesenchymal Transition ◽  
Barr Virus ◽  
Epstein Barr

Human papillomaviruses (HPVs) and the Epstein–Barr virus (EBV) are the most common oncoviruses, contributing to approximately 10%–15% of all malignancies. Oncoproteins of high-risk HPVs (E5 and E6/E7), as well as EBV (LMP1, LMP2A and EBNA1), play a principal role in the onset and progression of several human carcinomas, including head and neck, cervical and colorectal. Oncoproteins of high-risk HPVs and EBV can cooperate to initiate and/or enhance epithelial-mesenchymal transition (EMT) events, which represents one of the hallmarks of cancer progression and metastasis. Although the role of these oncoviruses in several cancers is well established, their role in the pathogenesis of colorectal cancer is still nascent. This review presents an overview of the most recent advances related to the presence and role of high-risk HPVs and EBV in colorectal cancer, with an emphasis on their cooperation in colorectal carcinogenesis.

scholarly journals Role of E6/E7 onco-proteins of high-risk human papillomaviruses in human colorectal carcinogenesis

Cell Cycle ◽  
2009 ◽  
Vol 8 (12) ◽  
pp. 1964-1965 ◽  
Author(s):  
Riccardo Ricciardi ◽  
Lina Ghabreau ◽  
Amber Yasmeen ◽  
Andrew D. Darnel ◽  
Nizar Akil ◽  
...  
Keyword(s):  
High Risk ◽  
Human Papillomaviruses ◽  
Colorectal Carcinogenesis

scholarly journals Co-Incidence of Epstein–Barr Virus and High-Risk Human Papillomaviruses in Cervical Cancer of Syrian Women

2018 ◽  
Author(s):  
Hamda Al-Thawadi ◽  
Lina Ghabreau ◽  
Tahar Aboulkassim ◽  
Amber Yasmeen ◽  
Semir Vranic ◽  
...  
Keyword(s):  
Cervical Cancer ◽  
High Risk ◽  
Human Papillomaviruses ◽  
Barr Virus ◽  
Aggressive Cancer ◽  
Important Regulator ◽  
Poorly Differentiated ◽  
Cancer Phenotype ◽  
Cancer Tissues

Epstein–Barr virus (EBV) has been recently shown to be co-present with high-risk human papillomaviruses (HPVs) in human cervical cancer; thus, these oncoviruses play an important role in the initiation and/or progression of this cancer. Accordingly, our group has recently viewed the presence and genotyping distribution of high-risk HPVs in cervical cancer in Syrian women; our data pointed out that HPVs are present in 95.45% of our samples. Herein, we aim to explore the co-prevalence of EBV and high-risk HPVs in 44 cervical cancer tissues from Syrian women using polymerase chain reaction (PCR), immunohistochemistry (IHC) and tissue microarray (TMA) analyses. We found that EBV and high-risk HPVs are co-present in 15/44 (34%) of the samples. Additionally, we report that the co-expression of LMP1 and E6 genes of EBV and high-risk HPVs, respectively, is associated with poorly differentiated squamous cell carcinomas phenotype; this is accompanied by a strong and diffused Id-1 overexpression, which is an important regulator of cell invasion and metastasis. These data imply that EBV and HPVs are co-present in cervical cancer in the Middle East area including Syria and their co-presence is associated with a more aggressive cancer phenotype. Future investigations are needed to elucidate the exact role of EBV and HPVs cooperation in cervical carcinogenesis.

scholarly journals Role of the Common Fragile Sites in Cancers with a Human Papillomavirus Etiology

2016 ◽  
Vol 150 (3-4) ◽  
pp. 217-226 ◽  
Author(s):  
Ge Gao ◽  
David I. Smith
Keyword(s):  
Cervical Cancer ◽  
Squamous Cell Carcinoma ◽  
High Risk ◽  
Chromosomal Instability ◽  
The United States ◽  
Fragile Sites ◽  
Human Papillomaviruses ◽  
New Models ◽  
The Common

High-risk human papillomaviruses (HPVs) are known to be associated with different anogenital cancers including cervical, anal, penile, and vaginal cancers. They are also found to be responsible for the dramatic increases in oropharyngeal squamous cell carcinoma (OPSCC) observed in the United States and Europe. The model for how high-risk HPVs induce cancer formation comes from studies of cervical cancer which usually involves integration of the HPV into the human genome and subsequent changes due to induced chromosomal instability. Recent work, discussed here, however suggests that this model may not be completely correct. In addition, we summarize studies now done in OPSCC which demonstrate that the role of HPV in these cancers may be different from that in cervical cancer. Finally, we propose new models for how HPV may be involved in the formation of these 2 cancers.

scholarly journals Role of the PDZ Domain-Binding Motif of the Oncoprotein E6 in the Pathogenesis of Human Papillomavirus Type 31

2004 ◽  
Vol 78 (22) ◽  
pp. 12366-12377 ◽  
Author(s):  
Choongho Lee ◽  
Laimonis A. Laimins
Keyword(s):  
High Risk ◽  
Pdz Domain ◽  
Immunohistochemical Analysis ◽  
Human Papillomaviruses ◽  
Binding Motif ◽  
Wild Type ◽  
Pdz Proteins ◽  
Viral Copy Number ◽  
Viral Copy

ABSTRACT A number of PDZ domain-containing proteins have been identified as binding partners for the oncoprotein E6 of the high-risk type human papillomaviruses (HPVs). These include hDlg, hScrib, MAGI-1, MAGI-2, MAGI-3, and MUPP1. The PDZ domain-binding motif (-X-T-X-V) at the carboxy terminus of E6 is essential for targeting PDZ proteins for proteasomal degradation. The presence of this motif only in the high-risk HPVs suggests its possible role in HPV-induced oncogenesis. To investigate the role of the PDZ domain-binding motif of E6 in the HPV life cycle, two mutant HPV31 genomes were constructed: E6ValΔ, with a deletion of the last amino acid residue of E6 (valine), and E6ETQVΔ, with a deletion of the entire PDZ domain-binding motif of E6 (ETQV). Three human foreskin keratinocyte (HFK) cell lines were established which maintained transfected wild-type HPV31 or either of two mutant genomes. Cells containing either of two mutant genomes were significantly retarded in their growth rates and reduced in their viral copy numbers compared to those transfected with wild-type genomes. Western analysis did not reveal any significant changes in the levels of PDZ proteins following stable transfection of any HPV31 genomes into HFKs. Although the E6ETQVΔ-transfected HFKs exhibited a pattern of morphological differentiation that appeared different from the HPV31 wild-type-transfected HFKs in organotypic raft cultures, immunohistochemical analysis failed to identify substantial changes in the differentiation-dependent membrane localization of hDlg proteins. These results suggest that binding of E6 to PDZ proteins modulates the early viral functions such as proliferation and maintenance of the viral copy number in undifferentiated cells.

scholarly journals High-Risk Human Papillomaviruses and Epstein–Barr Virus in Colorectal Cancer and Their Association with Clinicopathological Status

Pathogens ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 452 ◽  
Author(s):  
Ishita Gupta ◽  
Halema Al Farsi ◽  
Ayesha Jabeen ◽  
Faruk Skenderi ◽  
Hamda Al-Thawadi ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
High Risk ◽  
Epstein Barr Virus ◽  
Human Papillomaviruses ◽  
Sample Population ◽  
Barr Virus ◽  
The Status ◽  
Epstein Barr ◽  
High Risk Hpv

Colorectal cancer (CRC) is a common malignancy with a high mortality rate worldwide. It is a complex, multifactorial disease that is strongly impacted by both hereditary and environmental factors. The role of microbes (e.g., viruses) in the pathogenesis of CRC is poorly understood. In the current study, we explored the status of high-risk human papillomaviruses (HPV) and Epstein–Barr virus (EBV) in a well-defined CRC cohort using immunohistochemistry and polymerase chain reaction assays. Our data showed that high-risk HPVs were common (~80%) and EBV had a low presence (14–25%) in the CRC samples. The most common high-risk HPVs are HPV16, 31, 18, 51, 52 and 45 genotypes. The co-presence of high-risk HPV and EBV was observed in ~16% of the sample population without any significant association with the clinicopathological variables. We conclude that high-risk HPVs are very prevalent in CRC samples while EBV positivity is relatively low. The co-expression of the two viruses was observed in a minority of cases and without any correlation with the studied parameters. Further studies are necessary to confirm the clinical relevance and potential therapeutic (preventive) effects of the observations reported herein.

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