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Fluorometric study of fluoxetine DNA binding

Paper ID Volume ID Publish Year Pages File Format Full-Text
30784 44503 2012 6 PDF Available
Title
Fluorometric study of fluoxetine DNA binding
Abstract

Fluoxetine (FLX), a selective serotonin reuptake inhibitor (SSRI), is commonly prescribed to treat depression. The interaction between FLX antidepressant and calf thymus DNA (ctDNA) was investigated under simulated physiological conditions (Tris–HCl buffer at pH 7.4) using methylene blue [3,7-bis(dimethylamino) pheno-thrazin-5-ium chloride] (MB) dye as a probe using fluorescence spectroscopy. A strong fluorescence quenching reaction of DNA to FLX was observed. The corresponding numbers of binding sites (n) and binding constants (Kf) of DNA with FLX at 281, 310 and 318 K were calculated 2.1 × 105, 6.7 × 105 and 9.7 × 105 respectively. It can be concluded that FLX molecules could interact with ctDNA via outside, non-intercalative, binding as evidenced by quenching study with I−, ionic strength with NaCl and competitive investigation with MB. Thermodynamic parameters, enthalpy (ΔH) and entropy (ΔS) changes were calculated according to Van’t Hoff equation, which indicated that reaction is entropically driven. Furthermore, the interaction of FLX with poly A–T and poly C–G were carried out in order to comprehend the binding location of drug to DNA.

► Fluoxetine (FLX) is a wildly used antidepressant. ► Fluoxetine is a serotonin reuptake inhibitor. ► The interaction between FLX and DNA was studied via different fluorometric methods. ► All the results have been portended that FLX was a DNA groove binder.

Keywords
Fluoxetine; DNA binding; Methylene blue; Fluorescence spectroscopy
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 113, 1 August 2012, Pages 1–6
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us