Anusha M, Tejaswini V, Udhaya Kumar S, Prashantha C N, Vasudevan Karthick, George Priya Doss C
Department of Biotechnology, School of Applied Sciences, REVA University, Bengaluru, 560064, India.
Laboratory of Integrative Genomics, Department of Integrative Biology, School of Bio Sciences and Technology, Vellore Institute of Technology (VIT), Vellore, India.
Microb Pathog. 2023 May;178:106083. doi: 10.1016/j.micpath.2023.106083. Epub 2023 Mar 22.
Antimicrobial resistance has caused chaos worldwide due to the depiction of multidrug-resistant (MDR) infective microorganisms. A thorough examination of antimicrobial resistance (AMR) genes and associated resistant mechanisms is vital to solving this problem. Clostridium difficile (C. difficile) is an opportunistic nosocomial bacterial strain that has acquired exogenous AMR genes that confer resistance to antimicrobials such as erythromycin, azithromycin, clarithromycin, rifampicin, moxifloxacin, fluoroquinolones, vancomycin, and others. A network of interactions, including 20 AMR genes, was created and analyzed. In functional enrichment analysis, Cellular components (CC), Molecular Functions (MF), and Biological Processes (BP) were discovered to have substantial involvement. Mutations in the rpl genes, which encode ribosomal proteins, confer resistance in Gram-positive bacteria. Full erythromycin and azithromycin cross-resistance can be conferred if more than one of the abovementioned genes is present. In the enriched BP, rps genes related to transcriptional regulation and biosynthesis were found. The genes belong to the rpoB gene family, which has previously been related to rifampicin resistance. The genes rpoB, gyrA, gyrB, rpoS, rpl genes, rps genes, and Van genes are thought to be the hub genes implicated in resistance in C. difficile. As a result, new medications could be developed using these genes. Overall, our observations provide a thorough understanding of C. difficile AMR mechanisms.
由于多重耐药(MDR)感染性微生物的出现,抗生素耐药性已在全球范围内引发混乱。彻底检查抗生素耐药(AMR)基因及相关耐药机制对于解决这一问题至关重要。艰难梭菌是一种机会性医院菌株,它获得了赋予对红霉素、阿奇霉素、克拉霉素、利福平、莫西沙星、氟喹诺酮类、万古霉素等抗生素耐药性的外源AMR基因。构建并分析了一个包含20个AMR基因的相互作用网络。在功能富集分析中,发现细胞成分(CC)、分子功能(MF)和生物学过程(BP)有大量参与。编码核糖体蛋白的rpl基因中的突变赋予革兰氏阳性菌耐药性。如果存在上述多个基因,则可产生完全的红霉素和阿奇霉素交叉耐药性。在富集的BP中,发现了与转录调控和生物合成相关的rps基因。这些基因属于rpoB基因家族,此前已与利福平耐药性相关。rpoB、gyrA、gyrB、rpoS、rpl基因、rps基因和Van基因被认为是与艰难梭菌耐药性相关的枢纽基因。因此,可以利用这些基因开发新药物。总体而言,我们的观察结果提供了对艰难梭菌AMR机制的全面理解。