Biotechnology Bulletin ›› 2022, Vol. 38 ›› Issue (9): 28-34.doi: 10.13560/j.cnki.biotech.bull.1985.2022-0384

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Research Progress in Colistin(COL)Resistance in Bacterial and Its Reversal Mechanism

HU Gong-zheng(), CUI Xiao-die, ZHAI Ya-jun, HE Dan-dan   

  1. College of Veterinary Medicine,Henan Agricultural University,Zhengzhou 450046
  • Received:2022-03-30 Online:2022-09-26 Published:2022-10-11
  • Contact: HU Gong-zheng E-mail:yaolilab@126.com

Abstract:

Colistin(COL)is presently considered the “last resort” of defense against human infections caused by multidrug-resistant Gram-negative bacteria. With the increasing use of COL,bacterial COL resistance is also increasing worldwide. It is extremely difficult to develop new antibacterial drugs with new targets,and combination drugs to reverse drug resistance are cost-effective strategies to combat MDR bacteria. Antibiotic adjuvants target non-essential functions of bacteria and enhance antibiotic activity,providing a cost-effective way to reverse bacterial resistance. Based on the summary of the action mechanism of COL and resistant mechanism in bacteria,this paper focuses on the reversal role of adjuvants on COL resistance in Gram-negative and its molecular mechanism are mainly discussed. More than 60 adjuvants that can reverse COL resistance have been reported to date. It has been proved that the disruption of the bacterial cell envelope,efflux pump inhibition are the expression decrease of mcr-1 gene or activity inhibition of MCR-1 protein the important mechanism of COL resistance reversal. The research status and existing problems on the reversal role of adjuvants on COL resistance and its molecular mechanism of adjuvants is analyzed,and its development trend is prospected. Screening of the efficient reversal adjuvants,dose-effect relationship of the reversal roles and in-depth mechanistic studies will be important development direction in the future.

Key words: colistin, resistance reversal, reversal mechanism, action mechanism, resistance mechanism