title: Antiviral approaches for cancers related to Epstein-Barr virus and human papillomavirus.
abstract: Epstein-Barr virus and human papillomaviruses (HPV) are DNA viruses underlying the carcinogenesis of 15-20% of human cancers worldwide. Viral oncoproteins are involved in malignant transformation and maintenance of the malignant phenotype, mainly through interaction between oncoproteins and products of tumour-suppressor genes. The use of vaccines to prevent the occurrence of HPV-related cancers is being investigated. Several approaches have been used to inhibit expression of viral oncoproteins. The first strategy uses antisense oligodeoxynucleotides against viral oncoproteins; downregulation of the oncoproteins can influence tumour cell growth and restore sensitivity to cytotoxic agents. Another approach uses antiviral drugs such as acyclic nucleoside phosphonates; inhibition of virus replication can lead to downregulation of viral oncoproteinsand ultimately reactivate tumour-suppressor-gene pathways. In addition, the combination of acyclic nucleoside phosphonates with conventional cytotoxic agents is more effective than either agent alone. These data provide the basis for a novel anticancer strategy to improve the therapeutic ratio in virus-related cancers, which needs to be further investigated for clinical applications.
authors.affiliation: Departement de Radiotherapie, Institut Gustave Roussy, Villejuif, France.
authors.forename: B
authors.initials: B
authors.lastname: Abdulkarim
authors.forename: J
authors.initials: J
authors.lastname: Bourhis
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use; D000998:Antiviral Agents / Q000627:therapeutic use*; D002471:Cell Transformation, Neoplastic; D004359:Drug Therapy, Combination; D020031:Epstein-Barr Virus Infections / Q000188:drug therapy*; D005814:Genes, Viral; D004854:Herpesvirus 4, Human / Q000235:genetics; D006801:Humans; D009857:Oncogenes / Q000187:drug effects; D027383:Papillomaviridae; D030361:Papillomavirus Infections / Q000188:drug therapy*; D014412:Tumor Virus Infections / Q000188:drug therapy*
chemical_list: D000970:Antineoplastic Agents; D000998:Antiviral Agents