title: Multifactorial nature of hepatocellular carcinoma drug resistance: could plant polyphenols be helpful?
abstract: Primary hepatocellular carcinoma (HCC) is a quite frequent tumor which results in high mortality and most often exhibits a poor response to present drug therapies. Clearly, a thorough understanding of the biological bases of this malignancy might suggest new strategies for its treatment. Here we examine the evidences that both "pharmacological" mechanisms (e.g. drug transporter or detoxification enzyme over-expression) and alterations in other critical factors, including the IAPs (Inhibitory of Apoptosis Proteins), involved in enhancement of cell survival and proliferation may determine the therapeutic resistance of HCC; we also underline the possible role in the process of the activation of transcription factors, like NF-kappaB, capable of contemporaneously up-regulating the mechanisms discussed. On this basis, we finally comment on the possible use of natural multi-targeted antitumoral agents like plant polyphenols to achieve sensitization to treatments in HCC.
authors.affiliation: Department of Pharmacological Sciences, University of Palermo, Via del Vespro 129, Palermo 90127, Italy. dalessan@unipa.it
authors.forename: Natale
authors.initials: N
authors.lastname: D'Alessandro
authors.forename: Paola
authors.initials: P
authors.lastname: Poma
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Montalto
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000188:drug therapy* / Q000503:physiopathology; D019008:Drug Resistance, Neoplasm / Q000502:physiology*; D005419:Flavonoids / Q000494:pharmacology / Q000627:therapeutic use*; D006801:Humans; D051034:Inhibitor of Apoptosis Proteins / Q000502:physiology; D008113:Liver Neoplasms / Q000188:drug therapy* / Q000503:physiopathology; D016328:NF-kappa B / Q000502:physiology; D010636:Phenols / Q000494:pharmacology / Q000627:therapeutic use*; D008517:Phytotherapy / Q000379:methods; D028321:Plant Preparations / Q000494:pharmacology / Q000627:therapeutic use; D059808:Polyphenols
chemical_list: D005419:Flavonoids; D051034:Inhibitor of Apoptosis Proteins; D016328:NF-kappa B; D010636:Phenols; D028321:Plant Preparations; D059808:Polyphenols