SUN Jingdu
College of Animal Sciences, Zhejiang University, Hangzhou 310030, Zhejiang, ChinaJIA Chenghao
College of Animal Sciences, Zhejiang University, Hangzhou 310030, Zhejiang, China;Hainan Institute of Zhejiang University, Sanya 572025, Hainan, ChinaTANG Biao
Institute of Agricultural Product Quality, Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang, ChinaZHAO Guoping
Key Laboratory of Synthetic Biology, Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 200031, China;Biomedical Big Data Center, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai 200031, China;College of Life and Health Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, Zhejiang, ChinaYUE Min
College of Animal Sciences, Zhejiang University, Hangzhou 310030, Zhejiang, China;Hainan Institute of Zhejiang University, Sanya 572025, Hainan, ChinaAntibiotics are considered one of the cornerstones of modern medicine. However, the abuse of antimicrobial agents, including antibiotics, has accelerated the emergence of super bacteria that can resist multiple antimicrobial agents. Resistance genes are the key factors leading to bacterial resistance and can be horizontally transmitted by mobile genetic elements (MGEs), such as plasmids, transposons, and insertion sequences, posing a serious threat to public health. In recent years, facing the outbreak of carbapenem-resistant and polymyxin-resistant bacteria, tigecycline has been regarded as the “last line of defense” against multiple drug-resistant bacterial infections in humans. Recently, a novel mobile efflux pump gene cluster tmexCD-toprJ, mainly existing in plasmids, was found. This gene cluster encodes resistance-nodulation-cell division (RND) efflux pumps, which can expel a variety of antibiotics, including tigecycline, out of bacteria, greatly enhancing the resistance of bacteria. The tmexCD-toprJ gene cluster has been horizontally transferred to humans, animals, and the environment by mobile elements such as plasmids, posing a serious threat to public health. However, research on the specific structure and functional mechanism of TMexCD-TOprJ remains to be carried out. This article systematically summarizes the distribution characteristics, transmission mechanisms, and efflux pump structures of tmexCD-toprJ and proposes measures to block its spread from the concept of One Health, offering a scientific basis for slowing down the dissemination of tmexCD-toprJ.
SUN Jingdu, JIA Chenghao, TANG Biao, ZHAO Guoping, YUE Min. Research progress in a novel mobile RND efflux pump TMexCD-TOprJ. [J]. Acta Microbiologica Sinica, 2023, 63(11): 4101-4117
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