Decoralin Analogs with Increased Resistance to Degradation and Lower Hemolytic Activity

Author(s)

Torres, Marcelo D. T. ; Pedron, Cibele N. ; Araujo, Iris ; Silva, Jr., Pedro I. ; Silva, Fernanda D. ; Oliveira, Vani X.

• Document type: Journal article
• Source: CHEMISTRYSELECT; v. 2, n. 1, p. 18-23, JAN 10 2017.
• Web of Science Citations: 11

Abstract

Decoralin is an antimicrobial peptide with activity against microorganisms and pronounced hemolytic activity. Decoralin analogs have been proposed, and the results indicated that when isoleucine at position 6 was substituted by phenylalanine residue, the peptides exhibited increased resistance towards enzymes action. Besides that, lower hemolytic activity was obtained for {[}Pro](4)-Decoralin-NH2 and {[}Phe](6)-Des{[}Thr](11)-Decoralin-NH2; this effect is probably due to their poor helical tendency. {[}Arg](1)-Decoralin-NH2 exhibited + 4 net charge and lower hemolytic activity (25.0 mu mol L-1) and even showed helical propensity; as a consequence, it presented the higher therapeutic indexes (values from 16.0 to 32.0). The helical conformational tendency is believed to be determinant of the antimicrobial activity of this decoralin family and has been shown to be as important as the increased positive net charge. This points to a new direction for the design of potential chemotherapeutic agents. (AU)

• FAPESP's process: 14/12938-6 - Biologically active peptides against pathogenic micro-organisms
• Grantee: Vani Xavier de Oliveira Junior
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/04507-5 - Biological applications of new antimicrobial peptides
• Grantee: Marcelo Der Torossian Torres
• Support Opportunities: Scholarships in Brazil - Doctorate