Varsha Prakash Shetty, Sadanand Dangari Akshay, Praveen Rai, Vijaya Kumar Deekshit

Integrons as the potential targets for combating multidrug resistance inEnterobacteriaceaeusing CRISPR- Cas9 technique

  • Applied Microbiology and Biotechnology
  • General Medicine
  • Biotechnology
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AbstractThe emergence of multi-drug resistance (MDR) to pan-drug resistance (PDR) in Enterobacteriaceae has made treatment extremely challenging. Genetic mutations and horizontal gene transfer (HGT) through mobile genetic elements (MGEs) were frequently associated mechanisms of drug resistance in pathogens. However, transposons, plasmids, and integrons transfer MDR genes in bacterium via HGT much faster. Integrons are dsDNA segment that plays a crucial role in the adaptation and evolution of bacteria. They contain multiple gene cassettes that code for antibiotic resistance determinants that are expressed by a single promoter (Pc). Integrons are the cause of drug resistance in Enterobacteriaceae. Although alternatives to antibiotics such as bacteriophages, phage proteins, antimicrobial peptides, and natural compounds have been widely used to treat MDR infections, there have been limited efforts to reverse the antibiotic resistance ability of bacteria. Thus, silencing the genes harboured on MGEs achieved by Gene Editing Techniques (GETs) might prevent the spread of MDR. One such GETs, which has a simple design, good repeatability, low cost, and high efficiency, is CRISPR- Cas9 system. Thus, this review is a first of the kind that focuses on utilizing the structure of an integron to make it an ideal target for GETs like CRISPR- Cas9 systems.

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