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Papillomavirus E5: the smallest oncoprotein with many functions.
Aldo Venuti1, Francesca Paolini, Lubna Nasir
1Department of Pathology and Animal Health, University of Naples Federico II, Naples, Italy.
Molecular Cancer
|November 15, 2011
Summary
Human papillomaviruses (HPVs) cause cancers, with E6 and E7 oncoproteins well-studied. This review focuses on the less understood E5 oncoprotein, using Bovine Papillomavirus (BPV) as a model, and explores E5 as a therapeutic target.
Area of Science:
- Oncology
- Virology
- Molecular Biology
Background:
- Papillomaviruses (PVs) are linked to human and animal cancers, infecting epithelial cells.
- High-risk Human PVs (HPVs) are associated with cervical cancer and other malignancies.
- PV early oncoproteins E5, E6, and E7 contribute to tumor progression.
Purpose of the Study:
- To clarify the role of the E5 oncoprotein in PV-associated oncogenesis.
- To compare HPV-16 E5 (16E5) with E5 proteins from other PVs, particularly Bovine PV (BPV).
- To discuss the potential of targeting E5 as a therapeutic strategy.
Main Methods:
- Review of existing literature on PV oncoproteins.
- Comparative analysis of E5 protein functions across different PV types.
- Exploration of therapeutic implications based on E5's role.
Main Results:
- The oncogenic activities of HPV E6 and E7 are well-established.
- The specific role of the E5 oncoprotein in PV-induced cancer remains less understood.
- Bovine PV (BPV) serves as a key animal model for studying PV oncogenesis, especially the E5 protein's transformation potential.
Conclusions:
- Understanding PV E5 oncoproteins is crucial due to the widespread association of PVs with cancer.
- Differences between HPV-16 E5 and BPV E5 warrant further investigation.
- Targeting E5 presents a potential avenue for novel cancer therapies.
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