The rapid growth of antibiotic resistance in Staphylococcus aureus coupled with their biofilm forming ability has made the infections difficult to treat with conventional antibiotics.
金黄色葡萄球菌对抗生素的快速耐药性增长,加上其生物膜形成能力,使得这些感染难以用传统抗生素治疗。
Evolution of New “Bolaliposomes” using Novel α-Tocopheryl Succinate Based Cationic Lipid and 1,12-Disubstituted Dodecane-Based Bolaamphiphile for Efficient Gene Delivery
作者:Mallikarjun Gosangi、Hithavani Rapaka、Venkatesh Ravula、Srilakshmi V. Patri
DOI:10.1021/acs.bioconjchem.7b00283
日期:2017.7.19
Nonviral lipid-based vectors are promising transporting systems for the intracellular delivery of therapeutic gene sequences and directly influence the success of gene delivery. However, the associated drawbacks like lower transfection, toxicity, and targetability require further improvement. Thus, herein, we report a novel lipid formulation by the mixing of two distinct cationic surfactants such as tocopheryl succinate based cationic lipid and 1,12 dodecane based bolaamphiphile and prove it to be a good transfection reagent with its competing potential with the “golden standard”, Lipofectamine 3000 (L3K). These interesting aggregations were named “Bolaliposome” and showed adequate unilamellar vesicle morphology under transmission electron microscopy, having a size of around 100 nm and could transfect efficiently different varieties of cell lines. Moreover, the generated complexes from bolaliposome and DNA (bolalipoplex) were characterized in terms of surface potential, hydrodynamic size, and gel electrophoresis. Various pharmacological inhibitors were also used in reporter gene expression to prove that the complexes followed the clathrin-mediated endocytosis. Finally, these findings would be helpful in the making of new aggregates and the development of better cytofectins. This was developed by optimizing the formulation based on the efficiency of reporter gene expression performed using the pEGFP-N3 plasmid.
Cleavable Cationic Antibacterial Amphiphiles: Synthesis, Mechanism of Action, and Cytotoxicities
作者:Jiaul Hoque、Padma Akkapeddi、Venkateswarlu Yarlagadda、Divakara S. S. M. Uppu、Pratik Kumar、Jayanta Haldar
DOI:10.1021/la302303d
日期:2012.8.21
emergence of infectious diseases caused by pathogenic bacteria. Toward this end, we have developed a set of cationic dimeric amphiphiles (bearing cleavable amide linkages between the headgroup and the hydrocarbon tail with different methylene spacers) that showed high antibacterialactivity against human pathogenic bacteria (Escherichia coli and Staphylococcus aureus) and low cytotoxicity. The Minimum
Alkyl-Aryl-Vancomycins: Multimodal Glycopeptides with Weak Dependence on the Bacterial Metabolic State
作者:Paramita Sarkar、Debajyoti Basak、Riya Mukherjee、Julia E. Bandow、Jayanta Haldar
DOI:10.1021/acs.jmedchem.1c00449
日期:2021.7.22
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 persister cells complicates treatment. Toward this, we report alkyl-aryl-vancomycins (AAVs), with high potency against vancomycin-resistant enterococci and staphylococci. Unlike vancomycin, the lead
Further Investigations into Rigidity‐Activity Relationships in BisQAC Amphiphilic Antiseptics
作者:Austin J. Leitgeb、Javier A. Feliciano、Hugo A. Sanchez、Ryan A. Allen、Kelly R. Morrison、Kyle J. Sommers、Robert G. Carden、William M. Wuest、Kevin P. C. Minbiole
DOI:10.1002/cmdc.201900662
日期:2020.4.20
antimicrobial activity. The synthesized compounds showed strong antimicrobial activity against a panel of both Gram-positive and Gram-negative bacteria, including methicillin-resistant Staphylococcus aureus (MRSA). While the linker geometry showed only a modest correlation with antimicrobial activity, several of the synthesized bisQACs are promising potential antiseptics due to good antimicrobial activity (MIC≤2 μM)