title: Effect of the chalcone analog E,E-bis(2-hydroxybenzylidene) acetone on the 7,12-dimethylbenz[a]anthracene-induced Ha-ras gene activity in vivo.
abstract: The chalcone analog E,E-bis(2-hydroxybenzylidene)acetone (HBA) was found to display strong NAD(P)H:quinone reductase (NQO1) inducer potency in Hepa 1c1c7 cells. In order to determine whether this promising chemopreventive activity would extend to anticarcinogenic properties, the effect of HBA on the 7,12-dimethylbenz[a]anthracene (DMBA)-induced expression of the Ha-ras gene in isolated RNA from liver, lung, kidney, spleen, thymus, lymph nodes and bone marrow of CBA/Ca inbred mice was investigated. DMBA is a well-known chemical carcinogen, which can act as initiator by causing point mutations in certain oncogenes and tumor suppressor genes. According to the previous results, elevated Ha-ras expression has been noted even 24 h after DMBA treatment. Administration of HBA simultaneously with DMBA resulted in a decrease of the DMBA-induced Ha-ras gene expression in all the investigated tissues. This observation suggests metabolic interaction of HBA and DMBA. Administration of HBA 24 h prior to the DMBA treatment reduced the Ha-ras gene expression in all the tissues but the liver, where a slight elevation could be detected. This latter effect could be the result of a possible CYPIA inducer and pro-oxidant effects of HBA. The pro-oxidant effect of HBA can be taken into consideration based on its previously demonstrated GSH-reactivity and the present results obtained by investigation of the time-course of Fenton reaction-initiated degradation of 2-deoxyribose in the presence of HBA.
authors.affiliation: Institute of Pharmaceutical Chemistry, University of Pe'cs, School of Medicine, Rókus str. 2, H-7623, Pécs, Hungary. pal.perjesi@aok.pte.hu
authors.forename: Pál
authors.initials: P
authors.lastname: Perjési
authors.forename: István
authors.initials: I
authors.lastname: Ember
authors.forename: Richard E
authors.initials: RE
authors.lastname: Bozak
authors.forename: Edit
authors.initials: E
authors.lastname: Nádasi
authors.forename: Zsuzsanna
authors.initials: Z
authors.lastname: Rozmer
authors.forename: Timea
authors.initials: T
authors.lastname: Varjas
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: Hicks
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene / Q000494:pharmacology*; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D047188:Chalcones / Q000494:pharmacology*; D005260:Female; D005786:Gene Expression Regulation / Q000187:drug effects*; D011905:Genes, ras; D051379:Mice; D008808:Mice, Inbred CBA
chemical_list: D000975:Antioxidants; D047188:Chalcones; C509656:E,E-bis(2-hydroxybenzylidene)acetone; D015127:9,10-Dimethyl-1,2-benzanthracene