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Conjugation of Resveratrol with RGD and KGD Derivatives

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The reaction between Arg-Gly-Asp (RGD) and Lys-Gly-Asp (KGD) derivatives with 3,4',5-trihydroxy-transstilbene (resveratrol) was investigated. Knowing that resveratrol, RGD as well as KGD analogues inhibit human platelet aggregation in vitro, it was tempting for us to examine whether their coupling products present enhanced biological activity. Here, we report on the synthesis and identification of these coupling products. The N-protected peptides were synthesized by solid phase technique, using the 2-chlorotrityl-chloride resin, by the method of carbodiimides. Coupling reactions with resveratrol took place in solution using N,N-dicyclohexylcarbodiimide (DCC) as coupling reagent and 4- dimethylaminopyridine (DMAP) as catalyst. The reaction products were purified by reversed phase HPLC and identified by ESI-MS. The mono-esterified resveratrol derivative was the main (or only) reaction product, whereas the di- and the tri-ester (to a less extent) formation was noticed in some cases.

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Keywords: KGD; RGD; Resveratrol; coupling reactions; esterification

Document Type: Research Article

Publication date: 2007-10-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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