PMID- 31718965 OWN - NLM STAT- MEDLINE DCOM- 20201113 LR - 20201113 IS - 1873-3557 (Electronic) IS - 1386-1425 (Linking) VI - 228 DP - 2020 Mar 5 TI - A novel view of the separate and simultaneous binding effects of docetaxel and anastrozole with calf thymus DNA: Experimental and in silico approaches. PG - 117528 LID - S1386-1425(19)30918-7 [pii] LID - 10.1016/j.saa.2019.117528 [doi] AB - DNA stands as the primary purpose of many anticancer drugs and according to the performed research on this field, some certain changes contain crucial functionalities in the regulated transcription of DNA. Therefore, the interaction between anticancer drugs and DNA play an important role in understanding their function and also provide a better groundwork for producing more efficient and newer drugs. Here, the interaction between Docetaxel (DO) and calf thymus DNA (ct DNA), in the presence and absence of Anastrozole (AN), has been examined through the usage of different methods that include isothermal titration calorimetry, multi-spectroscopic, viscometry, and molecular docking techniques. Interaction studies have been performed by preparing different molar ratios of DO with the constant ct DNA and AN concentration at pH = 6.8. The binding constants have been calculated to be 7.93 x 10(4) M(-1) and 6.27 x 10(4) M(-1), which indicate the strong binding of DO with ct DNA double helix in the absence and presence of AN, respectively. Thermodynamic parameters, which were obtained from fluorescence spectroscopy and isothermal titration calorimetry, have suggested that the binding of DO and AN to ct DNA as binary and ternary systems have been mainly driven by the electrostatic interactions. The relative viscosity of ct DNA has increased upon the addition of DO and AN, which confirms the interaction mode. A competitive binding study has reported that the enhanced emission intensity of ethidium bromide (EB) and acridine orange (AO), in the presence of ct DNA, have been quenched through the addition of DO and Anastrozole as binary and ternary systems. As it is indicated by these findings, DO is capable of displacing EB and AO from their binding site in ct DNA; hence, it can be concluded that DO and AN are able to intercalate into the base pairs of ct DNA in binary and ternary systems. Molecular docking studies have corroborated the mentioned experimental results. CI - Copyright (c) 2019 Elsevier B.V. All rights reserved. FAU - Dareini, Maryam AU - Dareini M AD - Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran. FAU - Amiri Tehranizadeh, Zeinab AU - Amiri Tehranizadeh Z AD - Medicinal Chemistry Department, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address: amiritz921@mums.ac.ir. FAU - Marjani, Narges AU - Marjani N AD - Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran. FAU - Taheri, Reza AU - Taheri R AD - Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran. FAU - Aslani-Firoozabadi, Sogand AU - Aslani-Firoozabadi S AD - Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran. FAU - Talebi, Atiye AU - Talebi A AD - Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran. FAU - NayebZadeh Eidgahi, Negar AU - NayebZadeh Eidgahi N AD - Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran. FAU - Saberi, Mohammad Reza AU - Saberi MR AD - Medicinal Chemistry Department, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address: saberimr@mums.ac.ir. FAU - Chamani, Jamshidkhan AU - Chamani J AD - Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran. Electronic address: chamani.j@ut.ac.ir. LA - eng PT - Journal Article DEP - 20191030 PL - England TA - Spectrochim Acta A Mol Biomol Spectrosc JT - Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy JID - 9602533 RN - 15H5577CQD (Docetaxel) RN - 2Z07MYW1AZ (Anastrozole) RN - 9007-49-2 (DNA) RN - 91080-16-9 (calf thymus DNA) SB - IM MH - Anastrozole/chemistry/*metabolism MH - Binding, Competitive MH - Calorimetry MH - *Computer Simulation MH - DNA/chemistry/*metabolism MH - Docetaxel/chemistry/*metabolism MH - Kinetics MH - Models, Molecular MH - Nucleic Acid Denaturation MH - Osmolar Concentration MH - Scattering, Radiation MH - Spectrometry, Fluorescence MH - Thermodynamics MH - Viscosity OTO - NOTNLM OT - Anastrozole OT - Docetaxel OT - Intercalate OT - Molecular dynamics OT - Spectroscopy OT - Viscosity OT - ct DNA EDAT- 2019/11/14 06:00 MHDA- 2020/11/18 06:00 CRDT- 2019/11/14 06:00 PHST- 2019/07/26 00:00 [received] PHST- 2019/09/12 00:00 [revised] PHST- 2019/09/12 00:00 [accepted] PHST- 2019/11/14 06:00 [pubmed] PHST- 2020/11/18 06:00 [medline] PHST- 2019/11/14 06:00 [entrez] AID - S1386-1425(19)30918-7 [pii] AID - 10.1016/j.saa.2019.117528 [doi] PST - ppublish SO - Spectrochim Acta A Mol Biomol Spectrosc. 2020 Mar 5;228:117528. doi: 10.1016/j.saa.2019.117528. Epub 2019 Oct 30.