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DNA-drug interaction measurements using surface plasmon resonance.
Bischoff, G; Bischoff, R; Birch-Hirschfeld, E; Gromann, U; Lindau, S; Meister, W V; de A Bambirra, S; Bohley, C; Hoffmann, S.
Afiliación
  • Bischoff G; Martin Luther University, Halle-Wittenberg, Institute of Biochemistry, Halle (Saale), Germany. bischoff@fu-berlin.de
J Biomol Struct Dyn ; 16(2): 187-203, 1998 Oct.
Article en En | MEDLINE | ID: mdl-9833660
ABSTRACT
The interactions of the drugs 2,7-bis[(diethylamino)-ethoxy]-fluoren-9-one dihydrochloride (Tilorone), 2,7-bis[(dipropylamino)-acetamido]-fluoren-9-one dihydrochloride (FA-2), 2'-(4-hydroxyphenyl)-5-(4-methyl-1-piperazinyl)-2,5'-bi-1H-benzimidazole trihydrochloride (Hoechst 33258), and hematoporphyrin IX derivative (HPD) with synthetic self-complementary DNA (36-b.p.; 5'-biotin-spacer-[d(CGCTATATAGCG)]3-3') were studied by SPR (Surface Plasmon Resonance). Monolayers of biotinylated DNA were immobilized on a streptavidin-dextran-gold triple-layer. Small portions of the drugs (approximately 30 pmol/ml) were injected in continuous flow. The mass corresponded to the amount of the bound molecules. Injections of 50 mM sodium hydroxide pulses separated the DNA double strands, releasing the effector molecules. Subsequent treatments with the effectors gave reproducible results. The maximum interaction between drug and DNA was observed in the case of Tilorone. 41 molecules could bind to the 36-b.p. DNA duplex. To investigate the microscopic behavior in condensed nucleic acid phases, SFM (Scanning Force Microscopy)-imaging and polarizing microscopic observations of DNA-effector complexes were carried out. Supplementary UV-absorption thermal denaturation curves of DNA with the above-mentioned effectors in dilute solutions were measured. As an additional aid to understand the geometries of DNA-drug interactions, computer simulations were performed and compared with the experimental data.
Asunto(s)
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Bases de datos: MEDLINE Asunto principal: Tilorona / Derivado de la Hematoporfirina / ADN Complementario / Resonancia por Plasmón de Superficie / Bisbenzimidazol / Sustancias Intercalantes Idioma: En Revista: J Biomol Struct Dyn Año: 1998 Tipo del documento: Article País de afiliación: Alemania
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Bases de datos: MEDLINE Asunto principal: Tilorona / Derivado de la Hematoporfirina / ADN Complementario / Resonancia por Plasmón de Superficie / Bisbenzimidazol / Sustancias Intercalantes Idioma: En Revista: J Biomol Struct Dyn Año: 1998 Tipo del documento: Article País de afiliación: Alemania