A New Family of Highly Potent Inhibitors of Microbes: Synthesis and Conjugation of Elastin Based Peptides to Piperazine Derivative
作者:R. Suhas、S. Chandrashekar、D. Channe Gowda
DOI:10.1007/s10989-011-9282-8
日期:2012.6
Elastin protein-based polymers have their origin in repeating sequences of the mammalian elastic protein, elastin. The sequences of elastin peptides chosen are tetrapeptides, pentapeptides and tricosamers (30 amino acids) and also aromatic amino acids. These have been conjugated to 1-(2,3-dichlorophenyl)piperazine to study the effect of conjugation on the activity. The conjugates so obtained were characterized by physical and analytical techniques followed by the antimicrobial evaluation. The study revealed that all the conjugates have exhibited enhanced activity than the conventional drugs. Further, the conjugates of tricosamers have shown extraordinary activity against the fungal species with MIC value of 3–5 μg/ml which is five fold more potent than the antibiotic used.
Synthesis of elastin based peptides conjugated to benzisoxazole as a new class of potent antimicrobials – A novel approach to enhance biocompatibility
作者:R. Suhas、S. Chandrashekar、D. Channe Gowda
DOI:10.1016/j.ejmech.2010.12.005
日期:2011.2
The peptides of elastin sequences chosen for the present study included tetrapeptides, pentapeptides and tricosapeptides (30 amino acids), synthesized by classical solution phase method and conjugated to [3-(4-piperidyl)-6-fluoro-1,2-benzisoxazole]. The structures of the compounds were confirmed by physical and spectroscopic techniques followed by the antimicrobial evaluation by both agar well diffusion and microdilution methods. Here we wish to report the effect of conjugation of these moieties which enabled us to identify a novel set of peptides conjugated to heterocycle which have exhibited more potent antimicrobial activity than the conventional drugs used. Further, conjugates of tricosamers 34 and 35 were able to inhibit the growth of fungal species at 3-5 mu g/mL which is nearly 5 fold more potent than the reference drug. (C) 2010 Elsevier Masson SAS. All rights reserved.