Synthesis, biological evaluation, and metabolic stability of phenazine derivatives as antibacterial agents

Maddeboina Krishnaiah, Nathalia Rodrigues de Almeida, Venkatareddy Udumula, Zhongcheng Song, Yashpal Singh Chhonker, Mai M. Abdelmoaty, Valter Aragao do Nascimento, Daryl J Murry, Martin Conda Sheridan

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Drug-resistant pathogens are a major cause of hospital- and community-associated bacterial infections in the United States and around the world. These infections are increasingly difficult to treat due to the development of antibiotic resistance and the formation of bacterial biofilms. In the paper, a series of phenazines were synthesized and evaluated for their in vitro antimicrobial activity against Gram positive (methicillin resistant staphylococcus aureus, MRSA) and Gram negative (Escherichia coli, E. coli) bacteria. The compound 6,9-dichloro-N-(methylsulfonyl)phenazine-1-carboxamide (18c) proved to be the most active molecule (MIC = 16 μg/mL) against MRSA whereas 9-methyl-N-(methylsulfonyl)phenazine-1-carboxamide (30e) showed good activity against both MRSA (MIC = 32 μg/mL) and E. coli (MIC = 32 μg/mL). Molecule 18c also demonstrated significant biofilm dispersion and inhibition against S. aureus. Preliminary studies indicate the molecules do not disturb bacterial membranes and there activity is not directly linked to the generation of reactive oxygen species. Compound 18c displayed minor toxicity against mammalian cells. Metabolic stability studies of the most promising compounds indicate stability towards phase I and phase II metabolizing enzymes.

Original languageEnglish (US)
Pages (from-to)936-947
Number of pages12
JournalEuropean Journal of Medicinal Chemistry
Volume143
DOIs
StatePublished - Jan 1 2018

Fingerprint

Methicillin
Methicillin-Resistant Staphylococcus aureus
Biofilms
Anti-Bacterial Agents
Derivatives
Escherichia coli
Molecules
Phenazines
Bacterial Drug Resistance
Phase stability
Pathogens
Bacterial Infections
Toxicity
Staphylococcus aureus
Reactive Oxygen Species
Bacteria
Cells
Membranes
Enzymes
Infection

Keywords

  • Antibacterials
  • Biofilms
  • Medicinal chemistry
  • Phenazine

ASJC Scopus subject areas

  • Pharmacology
  • Drug Discovery
  • Organic Chemistry

Cite this

Synthesis, biological evaluation, and metabolic stability of phenazine derivatives as antibacterial agents. / Krishnaiah, Maddeboina; de Almeida, Nathalia Rodrigues; Udumula, Venkatareddy; Song, Zhongcheng; Chhonker, Yashpal Singh; Abdelmoaty, Mai M.; do Nascimento, Valter Aragao; Murry, Daryl J; Conda Sheridan, Martin.

In: European Journal of Medicinal Chemistry, Vol. 143, 01.01.2018, p. 936-947.

Research output: Contribution to journalArticle

Krishnaiah, Maddeboina ; de Almeida, Nathalia Rodrigues ; Udumula, Venkatareddy ; Song, Zhongcheng ; Chhonker, Yashpal Singh ; Abdelmoaty, Mai M. ; do Nascimento, Valter Aragao ; Murry, Daryl J ; Conda Sheridan, Martin. / Synthesis, biological evaluation, and metabolic stability of phenazine derivatives as antibacterial agents. In: European Journal of Medicinal Chemistry. 2018 ; Vol. 143. pp. 936-947.
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