کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1948711 1054707 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Selective binding of imatinib to the genetic variants of human α1-acid glycoprotein
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Selective binding of imatinib to the genetic variants of human α1-acid glycoprotein
چکیده انگلیسی

Imatinib is a selective tyrosine kinase inhibitor, successfully used for the treatment of chronic myelogenous leukaemia. Its strong plasma protein binding referred to α1-acid glycoprotein (AGP) component was found to inhibit the pharmacological activity. AGP shows genetic polymorphism and the two main genetic variants have different drug binding properties. The binding characteristics of imatinib to AGP genetic variants and the possibility of its binding interactions were investigated by various methods. The results proved that binding of imatinib to the two main genetic variants is very different, the high affinity binding belongs dominantly to the F1-S variant. This interaction is accompanied with specific spectral changes (induced circular dichroism, UV change, intrinsic fluorescence quenching), suggesting that the bound ligand has chiral conformation that would largely overlap with other ligands inside the protein cavity. Binding parameters of Ka = 1.7(± 0.2) × 106 M− 1 and n = 0.94 could be determined for the binding on the F1-S variant at 37°. Imatinib binding on the A variant is weaker and less specific. The binding affinity of imatinib to human serum albumin (nKa ≈ 3 × 104 M− 1) is low. Pharmacologically relevant binding interactions with other drugs can be expected on the F1-S variant of AGP.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - General Subjects - Volume 1760, Issue 11, November 2006, Pages 1704–1712
نویسندگان
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