Synthesis of potent CXCR4 inhibitors possessing low cytotoxicity and improved biostability based on T140 derivatives

Org Biomol Chem. 2003 Nov 7;1(21):3656-62. doi: 10.1039/b306473p.

Abstract

A peptidic CXCR4 antagonist T140 efficiently blocks the entry of T cell line-tropic strains of HIV-1 (X4-HIV-1) into target cells. In this study, a series of T140 derivatives, replacing the basic amino acid residues with Glu (D-Glu) and/or L-citrulline (Cit), were synthesized in order to reduce non-specific binding and cytotoxicity. Among them, TE14011 ([Cit6, D-Glu8]-T140 with the C-terminal amide) exhibited strong anti-HIV activity and low cytotoxicity. TE14011 was found to be stable in mouse serum, but unstable in rat liver homogenate due to the deletion of the N-terminal Arg1-Arg2-L-3-(2-naphthyl)alanine (Nal)3 residues from the parent peptide. N-Terminal acetylation of TE14011 led to the development of a novel lead compound, Ac-TE 14011, which possesses a high selectivity index as well as increased stability in serum and liver homogenate.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Cell Line
  • Humans
  • Mice
  • Molecular Sequence Data
  • Oligopeptides / chemistry
  • Oligopeptides / pharmacology*
  • Receptors, CXCR4 / antagonists & inhibitors*
  • T-Lymphocytes / drug effects
  • T-Lymphocytes / metabolism

Substances

  • Oligopeptides
  • Receptors, CXCR4
  • T140 peptide