5345-68-6Relevant articles and documents
Vancomycin Derivative Inactivates Carbapenem-Resistant Acinetobacter baumannii and Induces Autophagy
Ammanathan, Veena,Chopra, Sidharth,Ghosh, Chandradhish,Haldar, Jayanta,Kaul, Grace,Manjithaya, Ravi,Samaddar, Sandip,Sarkar, Paramita,Shukla, Manjulika,Yarlagadda, Venkateswarlu
, p. 884 - 889 (2020)
Vancomycin is a standard drug for the treatment of multidrug-resistant Gram-positive bacterial infections. Albeit, development of resistance (VRE, VRSA) and its inefficacy against persistent infections is a demerit. It is also intrinsically inactive against Gram-negative bacteria. Herein, we report a vancomycin derivative, VanQAmC10, that addresses these challenges. VanQAmC10 was rapidly bactericidal against carbapenem-resistant A. baumannii (6 log10 CFU/mL reduction in 6 h), disrupted A. baumannii biofilms, and eradicated their stationary phase cells. In MRSA infected macrophages, the compound reduced the bacterial burden by 1.3 log10 CFU/mL while vancomycin exhibited a static effect. Further investigation indicated that the compound, unlike vancomycin, promoted the intracellular degradative mechanism, autophagy, in mammalian cells, which may have contributed to its intracellular activity. The findings of the work provide new perspectives on the field of glycopeptide antibiotics.
Alkyl-Aryl-Vancomycins: Multimodal Glycopeptides with Weak Dependence on the Bacterial Metabolic State
Sarkar, Paramita,Basak, Debajyoti,Mukherjee, Riya,Bandow, Julia E.,Haldar, Jayanta
, p. 10185 - 10202 (2021/07/28)
Resistance to last-resort antibiotics such as vancomycin for Gram-positive bacterial infections necessitates the development of new therapeutics. Furthermore, the ability of bacteria to survive antibiotic therapy through formation of biofilms and persiste
Antibacterial and Antibiofilm Activity of Cationic Small Molecules with Spatial Positioning of Hydrophobicity: An in Vitro and in Vivo Evaluation
Hoque, Jiaul,Konai, Mohini M.,Sequeira, Shanola S.,Samaddar, Sandip,Haldar, Jayanta
, p. 10750 - 10762 (2016/12/16)
More than 80% of the bacterial infections are associated with biofilm formation. To combat infections, amphiphilic small molecules have been developed as promising antibiofilm agents. However, cytotoxicity of such molecules still remains a major problem. Herein we demonstrate a concept in which antibacterial versus cytotoxic activities of cationic small molecules are tuned by spatial positioning of hydrophobic moieties while keeping positive charges constant. Compared to the molecules with more pendent hydrophobicity from positive centers (MIC = 1-4 μg/mL and HC50 = 60-65 μg/mL), molecules with more confined hydrophobicity between two centers show similar antibacterial activity but significantly less toxicity toward human erythrocytes (MIC = 1-4 μg/mL and HC50 = 805-1242 μg/mL). Notably, the optimized molecule is shown to be nontoxic toward human cells (HEK 293) at a concentration at which it eradicates established bacterial biofilms. The molecule is also shown to eradicate preformed bacterial biofilm in vivo in a murine model of superficial skin infection.