Identification of the Anti-Mycobacterial Functional Properties of Piperidinol Derivatives

Br J Pharmacol. 2017 Jul;174(14):2183-2193. doi: 10.1111/bph.13744. Epub 2017 Mar 23.

Abstract

Background and purpose: Tuberculosis (TB) remains a major global health threat and is now the leading cause of death from a single infectious agent worldwide. The current TB drug regimen is inadequate, and new anti-tubercular agents are urgently required to be able to successfully combat the increasing prevalence of drug-resistant TB. The purpose of this study was to investigate a piperidinol compound derivative that is highly active against the Mycobacterium tuberculosis bacillus.

Experimental approach: The antibacterial properties of the piperidinol compound and its corresponding bis-Mannich base analogue were evaluated against M. smegmatis and Gram-negative organisms. Cytotoxicity studies were undertaken in order to determine the selectivity index for these compounds. Spontaneous resistant mutants of M. smegmatis were generated against the piperidinol and corresponding bis-Mannich base lead derivatives and whole genome sequencing employed to determine the genetic modifications that lead to selection pressure in the presence of these compounds.

Key results: The piperidinol and the bis-Mannich base analogue were found to be selective for mycobacteria and rapidly kill this organism with a cytotoxicity selectivity index for mycobacteria of >30-fold. Whole genome sequencing of M. smegmatis strains resistant to the lead compounds led to the identification of a number of single nucleotide polymorphisms indicating multiple targets.

Conclusion and implications: Our results indicate that the piperidinol moiety represents an attractive compound class in the pursuit of novel anti-tubercular agents.

Linked articles: This article is part of a themed section on Drug Metabolism and Antibiotic Resistance in Micro-organisms. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.14/issuetoc.

MeSH terms

  • Anti-Bacterial Agents / chemical synthesis
  • Anti-Bacterial Agents / chemistry
  • Anti-Bacterial Agents / pharmacology*
  • Cell Survival / drug effects
  • Dose-Response Relationship, Drug
  • Escherichia coli / drug effects*
  • Humans
  • Microbial Sensitivity Tests
  • Molecular Structure
  • Mycobacterium smegmatis / drug effects*
  • Mycobacterium smegmatis / genetics
  • Piperidines / chemical synthesis
  • Piperidines / chemistry
  • Piperidines / pharmacology*
  • Polymorphism, Single Nucleotide / drug effects
  • Polymorphism, Single Nucleotide / genetics
  • Pseudomonas putida / drug effects*
  • Structure-Activity Relationship
  • Tumor Cells, Cultured

Substances

  • Anti-Bacterial Agents
  • Piperidines