کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1234875 968838 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spectroscopic studies of dactinomycin and vinorelbine binding to deoxyribonucleic acid and chromatin
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Spectroscopic studies of dactinomycin and vinorelbine binding to deoxyribonucleic acid and chromatin
چکیده انگلیسی

Dactinomycin and vinorelbine are anticancer drugs, widely used as chemotherapeutic agents for the treatment of various cancers. This study represents an attempt to compare the effect of these drugs on DNA and soluble chromatin employing UV/vis, fluorescence and circular dichroism spectroscopy techniques. The results demonstrated that the absorbance at 260 and 210 nm was decreased and quenching of drugs with DNA and chromatin chromospheres induced reduction of fluorescence emission intensity. Circular dichroism profiles showed that the binding of drugs induced structural changes in both positive and negative extremes of DNA and chromatin revealing release or displacement of histone proteins from chromatin upon dactinomycin binding whereas vinorelbine preceded the chromatin into compaction. The results suggest that dactinomycin shows higher affinity to DNA compared to chromatin, whereas, vinorelbine recognizes the chromatin structure with higher affinity than free DNA. Also chromatin proteins play a fundamental role in drug–chromatin complex process.

Figure optionsDownload as PowerPoint slideHighlights
► Different affinity of dactinomycin and vinorelbine to DNA and chromatin.
► Release of histone proteins from DNA upon binding of dactinomycin to chromatin.
► Vinorelbine shows higher affinity to chromatin than to DNA.
► Compaction of chromatin by vinorelbine.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 84, Issue 1, 15 December 2011, Pages 62–67
نویسندگان
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