Discovery of indeno[1,2-c]quinoline derivatives as potent dual antituberculosis and anti-inflammatory agents

Chih Hua Tseng, Chun Wei Tung, Chen Hsin Wu, Cherng Chyi Tzeng, Yen Hsu Chen, Tsong Long Hwang, Yeh Long Chen

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A series of indeno[1,2-c]quinoline derivatives were designed, synthesized and evaluated for their anti-tuberculosis (anti-TB) and anti-inflammatory activities. The minimum inhibitory concentration (MIC) of the newly synthesized compound was tested against Mycobacterium tuberculosis H37RV. Among the tested compounds, (E)-N-[6-(4-hydroxypiperidin-1-yl)-11H-indeno[1,2-c]quinolin-11-ylidene]isonicotino-hydrazide (12), exhibited significant activities against the growth of M. tuberculosis (MIC values of 0.96 µg/mL) with a potency approximately equal to that of isoniazid (INH), an anti-TB drug. Important structure features were analyzed by quantitative structure–activity relationship (QSAR) analysis to give better insights into the structure determinants for predicting the anti-TB activity. The anti-inflammatory activity was induced by superoxide anion generation and neutrophil elastase (NE) release using the formyl-L-methionyl-L-leucyl-L-phenylalanine (fMLF)-activated human neutrophils method. Results indicated that compound 12 demonstrated a potent dual inhibitory effect on NE release and superoxide anion generation with IC50 values of 1.76 and 1.72 µM, respectively. Our results indicated that compound 12 is a potential lead compound for the discovery of dual anti-TB and anti-inflammatory drug candidates. In addition, 6-[3-(hydroxymethyl)piperidin-1-yl]-9-methoxy-11H- indeno[1,2-c]quinolin-11-one (4g) showed a potent dual inhibitory effect on NE release and superoxide anion generation with IC50 values of 0.46 and 0.68 µM, respectively, and is a potential lead compound for the discovery of anti-inflammatory drug candidates.

Original languageEnglish
Article number1001
JournalMolecules
Volume22
Issue number6
DOIs
Publication statusPublished - Jun 1 2017
Externally publishedYes

Keywords

  • Anti-inflammatory activity
  • Antimycobacterial activity
  • Indeno[1,2-c]quinoline

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemistry (miscellaneous)
  • Molecular Medicine
  • Pharmaceutical Science
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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