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Production of antibacterial compounds using

Omaish Alqahtani1,2, Paul Stapleton2, Simon Gibbons3

  • 1Department of Pharmacognosy, College of Pharmacy, Najran University, Najran, Saudi Arabia.

Saudi Pharmaceutical Journal : SPJ : the Official Publication of the Saudi Pharmaceutical Society
|June 7, 2023
PubMed
Summary

Researchers explored Saudi Arabian thermal springs, discovering bacteria that produce antibacterial compounds. These compounds show activity against resistant bacteria, offering potential for new drug development.

Keywords:
16S rRNA gene sequencingAntimicrobial agentsBacillus spp.Bacterial resistanceThermal springs

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Area of Science:

  • Microbiology
  • Natural Product Chemistry
  • Pharmacology

Background:

  • Antibiotic resistance is a growing global health threat.
  • Natural products from extremophiles are a promising source for novel antimicrobials.

Purpose of the Study:

  • To isolate and identify antibiotic-producing bacteria from Saudi Arabian thermal springs.
  • To characterize the antibacterial compounds produced by these bacteria.
  • To evaluate the efficacy of isolated compounds against pathogenic bacteria.

Main Methods:

  • Collection and analysis of water samples from thermal springs.
  • Microbiological assays for antibacterial activity screening.
  • 16S rRNA gene sequencing for bacterial identification.
  • Chromatographic and spectroscopic techniques for compound isolation and structure elucidation.
  • Minimum Inhibitory Concentration (MIC) assays.

Main Results:

  • Four compounds were isolated: N-acetyltryptamine (1), isovaleric acid (2), ethyl-4-ethoxybenzoate (3), and phenylacetic acid (4).
  • Compounds 1, 2, and 4 were produced by *Bacillus pumilus*, and compound 3 by *Bacillus licheniformis* (AH-E1).
  • All isolated compounds exhibited antibacterial activity against Gram-positive pathogens (MICs 128–512 mg/L).
  • Compound 2 demonstrated activity against *Escherichia coli*.

Conclusions:

  • Saudi Arabian thermal springs harbor bacteria with potential for producing novel antibacterial agents.
  • The isolated compounds, particularly isovaleric acid, show promise for combating bacterial infections.
  • Further research into these natural products could lead to new therapeutic strategies against antibiotic-resistant bacteria.