Article
Public, Environmental & Occupational Health
Z. Elnasser, R. Elsamarneh, H. Obeidat, Z. Amarin, S. Jaradat, N. Kaplan
Summary: The study identified multidrug-resistant Gram negative bacteria isolates with high resistance to various antibiotics, including approximately 21.4% resistance to tigecycline. These pathogens also carried resistance-related genes such as AcrB, RamR, and TetA.
JOURNAL OF INFECTION AND PUBLIC HEALTH
(2021)
Article
Microbiology
Weijie Wang, Xiaoli Zhu, Huan Luo, Zheng Wang, Anjin Hong, Jie Zeng, Li Li, Dai Wang, Xianming Deng, Xilin Zhao
Summary: As the increase in antimicrobial resistance continues, the options for effectively treating multidrug-resistant (MDR) Gram-negative infections are decreasing. Finding ways to enhance the lethality of old agents with unique molecular targets is important, as new antimicrobial development is increasingly difficult. This study showed that the old antibiotic bicyclomycin has good bacteriostatic activity against multiple clinical isolates of MDR Gram-negative pathogens. Additionally, the combination of bicyclomycin with doxycycline showed enhanced efficacy in inhibiting bacterial growth and in vivo killing, suggesting the potential of bicyclomycin-containing regimens as new treatment options for MDR Gram-negative infections caused by specific pathogens.
MICROBIOLOGY SPECTRUM
(2023)
Article
Immunology
Sharon Ong'uti, Mary Czech, Elizabeth Robilotti, Marisa Holubar
Summary: Cefiderocol, a novel injectable siderophore cephalosporin, is effective against multidrug-resistant gram-negative bacteria by hijacking the bacterial iron transport system. It has broad-spectrum antibacterial activity, including against carbapenem-resistant and Acinetobacter baumannii strains.
CLINICAL INFECTIOUS DISEASES
(2022)
Article
Microbiology
Arianne Lovey, Mila Krel, Allen Borchardt, Thomas Brady, Jason N. Cole, Quyen-Quyen Do, Joanne Fortier, Grayson Hough, Wanlong Jiang, Alain Noncovich, Les Tari, Qiping Zhao, James M. Balkovec, Yanan Zhao, David S. Perlin
Summary: ADCs have the potential to bind strongly to drug-resistant G- pathogens, regardless of lipopolysaccharide modifications, indicating a promising treatment alternative in infections caused by drug-resistant G- bacteria.
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
(2021)
Article
Infectious Diseases
Saoussen Oueslati, Pierre Bogaerts, Laurent Dortet, Sandrine Bernabeu, Hend Ben Lakhal, Christopher Longshaw, Youri Glupczynski, Thierry Naas
Summary: The study evaluated the in vitro activity of cefiderocol against multidrug-resistant GN bacteria, including MR and PR isolates from France and Belgium. The results showed that cefiderocol demonstrated high susceptibility rates against a wide range of MDR GN pathogens.
Article
Infectious Diseases
Hang Thi Nguyen, Henrietta Venter, Tania Veltman, Ruth Williams, Lisa Anne O'Donovan, Cecilia C. Russell, Adam McCluskey, Stephen W. Page, Abiodun David Ogunniyi, Darren J. Trott
Summary: This study investigated the potential of using the novel antibiotic NCL195 combined with subinhibitory concentrations of colistin against infections caused by Gram-negative bacteria. The combination showed synergistic activity against clinical multidrug-resistant GNB pathogens and caused marked ultrastructural changes in the cell envelope. Further exploration is warranted to determine the specific treatment of acute GNB infections.
INTERNATIONAL JOURNAL OF ANTIMICROBIAL AGENTS
(2021)
Article
Microbiology
Su Min Son, Joonbeom Kim, Sangryeol Ryu
Summary: The study introduces a potential biocontrol agent, a fusion endolysin called Lys1S-L9P, which shows high bactericidal effects and biofilm eradication capabilities against MDR Gram-negative bacteria. It also demonstrates stability at various storage temperatures and no cytotoxicity against human cells, making it a promising candidate for clinical use.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Immunology
Mariana Albano, Wim Alexander Fleischmann, Kerryl E. Greenwood-Quaintance, Robin Patel
Summary: Arbekacin showed inhibitory activity against drug-resistant Gram-negative bacilli, with similar MIC50 values to amikacin and gentamicin, lower than tobramycin, and higher than plazomicin.
JOURNAL OF MICROBIOLOGY IMMUNOLOGY AND INFECTION
(2021)
Review
Biotechnology & Applied Microbiology
Gleyce Hellen de Almeida de Souza, Luana Rossato, Alexandre Ribeiro de Oliveira, Simone Simionatto
Summary: The spread of polymyxin-resistant Klebsiella pneumoniae strains poses a challenge to patient treatment, necessitating the development of new antibiotics. Antimicrobial peptides (AMPs) are potential compounds in combating antimicrobial resistance, and their patents tested against polymyxin-resistant K. pneumoniae were reviewed. Out of 1313 patents examined, only 14 were found to be effective against polymyxin-resistant K. pneumoniae strains. Although still in the experimental or pre-clinical phase, these AMPs provide a starting point for the development of new antimicrobials.
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
(2023)
Article
Microbiology
Jacinda C. Abdul-Mutakabbir, Logan Nguyen, Philip T. Maassen, Kyle C. Stamper, Razieh Kebriaei, Keith S. Kaye, Mariana Castanheira, Michael J. Rybak
Summary: Cefiderocol, a novel siderophore cephalosporin, shows potent activity against multidrug-resistant Acinetobacter baumannii, with lower MIC values compared to other Gram-negative agents. Studies indicate synergistic effects when combined with other antibiotics, and beta-lactamase inhibitors increase susceptibility to CFDC in MDR A. baumannii isolates.
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
(2021)
Review
Medicine, General & Internal
Erlangga Yusuf, Hannelore I. Bax, Nelianne J. Verkaik, Mireille van Westreenen
Summary: Infections in the ICU are often caused by Gram-negative bacteria, which can become resistant to traditional antibiotics, limiting treatment options. In recent years, FDA has approved new antibiotics with predominant activities against Gram-negative bacteria, providing more choices for treatment in specific circumstances.
JOURNAL OF CLINICAL MEDICINE
(2021)
Review
Immunology
Arsheena Yassin, Mariya Huralska, Jason M. Pogue, Deepali Dixit, Robert G. Sawyer, Keith S. Kaye
Summary: The prevalence of multidrug-resistant gram-negative bacterial infections has significantly increased in the past decade, leading to higher rates of morbidity and mortality. Treating these infections presents challenges, particularly for critically ill patients with limited margin for error. The availability of new therapies has improved treatment options, but optimal clinical and therapeutic approaches for managing these infections still need to be established.
CLINICAL INFECTIOUS DISEASES
(2023)
Article
Chemistry, Medicinal
Dongliang Guan, Jian Li, Feifei Chen, Jiaqi Li, Xiaolei Bian, Yue Yu, Xinxin Feng, Lefu Lan, Wei Huang
Summary: A concise semisynthetic approach was established to modify daptomycin specifically and effectively. A total of 19 novel derivatives were synthesized and evaluated, with the optimal compound hexakynomycin exhibiting significantly higher activity against various drug-resistant pathogens compared to daptomycin. This study provided insights and a promising strategy for the next generation of daptomycin derivatives. Overall, the findings are significant and deserving of a rating of 8/10.
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Review
Pharmacology & Pharmacy
Chuanhai Wang, Deqing Yang, Yifan Wang, Wentao Ni
Summary: Cefiderocol is a promising powerful weapon for treating multidrug-resistant (MDR) infections, showing high in vitro and in vivo activity, especially against carbapenem-resistant isolates. Clinical trials have demonstrated its efficacy in treating complicated urinary tract infection and nosocomial pneumonia.
FRONTIERS IN PHARMACOLOGY
(2022)
Article
Microbiology
Yuvaneswary Veloo, Syahidiah S. A. Thahir, Sakshaleni Rajendiran, Lim K. Hock, Norazah Ahmad, Vickneshwaran Muthu, Rafiza Shaharudin
Summary: The indiscriminate use of antibiotics in poultry farming has led to the emergence of antibiotic-resistant bacteria in poultry products and the surrounding environment. This study found high rates of multidrug-resistant Gram-negative bacteria in the environment of poultry farms, with some strains exhibiting resistance to multiple antibiotics. The presence of these bacteria poses a significant threat to the effectiveness of available antibiotics in treating infectious diseases. Efforts to regulate antibiotic use and conduct research on One Health issues are necessary to combat and prevent the spread of antibiotic-resistant bacteria.
MICROBIOLOGY SPECTRUM
(2022)
Article
Biochemistry & Molecular Biology
Sorina Chiorean, Isaac Antwi, Daniel W. Carney, Ioli Kotsogianni, Andrew M. Giltrap, Francesca M. Alexander, Stephen A. Cochrane, Richard J. Payne, Nathaniel I. Martin, Antoine Henninot, John C. Vederas
Article
Medicine, Research & Experimental
Andrew G. Masoud, Jiaxin Lin, Abul K. Azad, Maikel A. Farhan, Conrad Fischer, Lin F. Zhu, Hao Zhang, Banu Sis, Zamaneh Kassiri, Ronald B. Moore, Daniel Kim, Colin C. Anderson, John C. Vederas, Benjamin A. Adam, Gavin Y. Oudit, Allan G. Murray
JOURNAL OF CLINICAL INVESTIGATION
(2020)
Article
Chemistry, Multidisciplinary
Camilla Calabrese, Iciar Uriarte, Aran Insausti, Montserrat Vallejo-Lopez, Francisco J. Basterretxea, Stephen A. Cochrane, Benjamin G. Davis, Francisco Corzana, Emilio J. Cocinero
ACS CENTRAL SCIENCE
(2020)
Article
Biochemical Research Methods
Diana P. Gomez-Mendoza, Rafael Pereira Lemos, Itamar C. G. Jesus, Vladimir Gorshkov, Shaun M. K. McKinnie, John C. Vederas, Frank Kjeldsen, Silvia Guatimosim, Robson Augusto Santos, Adriano M. C. Pimenta, Thiago Verano-Braga
JOURNAL OF PROTEOME RESEARCH
(2020)
Article
Chemistry, Medicinal
Conrad Fischer, Tess Lamer, Kleinberg Fernandez, Mahmoud Gheblawi, Wang Wang, Cameron Pascoe, Gareth Lambkin, Xavier Iturrioz, Catherine Llorens-Cortes, Gavin Y. Oudit, John C. Vederas
JOURNAL OF MEDICINAL CHEMISTRY
(2020)
Correction
Multidisciplinary Sciences
Wayne Vuong, Muhammad Bashir Khan, Conrad Fischer, Elena Arutyunova, Tess Lamer, Justin Shields, Holly A. Saffran, Ryan T. McKay, Marco J. van Belkum, Michael A. Joyce, Howard S. Young, D. Lorne Tyrrell, John C. Vederas, M. Joanne Lemieux
NATURE COMMUNICATIONS
(2020)
Review
Chemistry, Medicinal
Brad R. Baker, Callum M. Ives, Ashley Bray, Martin Caffrey, Stephen A. Cochrane
Summary: UdpK is a bifunctional undecaprenol kinase/phosphatase crucial for regulating the homeostasis of the bacterial undecaprenoid pool in Gram-positive bacteria; dgkA gene expression is linked to bacterial growth, survival, and resistance mechanisms; research on the mechanism and substrate specificity of UdpK might lead to novel antibiotic treatments.
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2021)
Article
Biotechnology & Applied Microbiology
Albert Remus R. Rosana, Stanley Pokorny, Jennifer G. Klutsch, Cherry Ibarra-Romero, Randy Sanichar, Daniel Engelhardt, Marco J. van Belkum, Nadir Erbilgin, Joerg Bohlmann, Allan L. Carroll, John C. Vederas
Summary: The mountain pine beetle has become an invasive species in certain regions of Canada, with the research on Beauveria bassiana showing potential as a biocontrol agent and identifying three phenotypic groups. There are significant differences in infection rates and mortality rates among various populations of bark beetles.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2021)
Article
Immunology
Pollyana Maria de Oliveira Pimentel, Diego Rodney Rodrigues de Assis, Melisa Gualdron-Lopez, Andreia Barroso, Fatima Brant, Paulo Gaio Leite, Bruno Cabral de Lima Oliveira, Lisia Esper, Shaun M. K. McKinnie, John C. Vederas, Marta do Nascimento Cordeiro, Pablo Victor Mendes dos Reis, Mauro Martins Teixeira, Adriano Monteiro de Castro Pimenta, Marcia Helena Borges, Maria Elena de Lima, Fabiana Simao Machado
Summary: The study found that components of Tityus serrulatus venom have therapeutic effects on Trypanosoma cruzi infection, increasing nitric oxide and proinflammatory cytokine production while decreasing parasite replication and release, with a positive effect on p38 activation. This research opens up new perspectives for finding new strategies for Chagas Disease treatment.
CLINICAL IMMUNOLOGY
(2021)
Article
Chemistry, Medicinal
Ioli Kotsogianni, Thomas M. Wood, Francesca M. Alexander, Stephen A. Cochrane, Nathaniel Martin
Summary: Multidrug-resistant bacteria are a serious global health threat, and understanding the mechanism of action of antimicrobials is key to developing new drugs to combat antimicrobial resistance. Daptomycin disrupts Gram-positive bacterial membranes and its calcium binding is strongly dependent on the presence of phosphatidylglycerol.
ACS INFECTIOUS DISEASES
(2021)
Article
Chemistry, Medicinal
Ross D. Ballantine, Karol Al Ayed, Samantha J. Bann, Michael Hoekstra, Nathaniel I. Martin, Stephen A. Cochrane
Summary: In this study, the researchers found that the macrocyclic core of brevicidine and laterocidine, which are macrocyclic lipodepsipeptides with selective activity against Gram-negative bacteria, is not essential for their antibacterial activity. By modifying the linear scaffolds of these peptides, they were able to retain their potent antibacterial activity and low hemolysis. This linearization strategy may provide a more efficient and cost-effective method for synthesizing peptides and could potentially be applied to other nonribosomal antibacterial peptides.
JOURNAL OF MEDICINAL CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Ned P. Buijs, Eilidh J. Matheson, Stephen A. Cochrane, Nathaniel I. Martin
Summary: Since the discovery of penicillin by Fleming, numerous natural product antibiotics have been found, many of which are still clinically important today. These antibiotics selectively target and kill bacterial cells through various mechanisms of action. Bacterial cell wall biosynthesis is a crucial process for their growth and survival, and the vulnerability in maintaining the cell wall is exploited by many antibiotics. In this feature article, we provide an overview of natural product antibiotics that specifically function by binding to membrane-anchored bacterial cell wall precursors.
CHEMICAL COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Ross D. Ballantine, Karol Al Ayed, Samantha J. Bann, Michael Hoekstra, Nathaniel I. Martin, Stephen A. Cochrane
Summary: The brevicidine and laterocidine family of lipopeptide antibiotics show strong activity against multidrug-resistant Gram-negative bacteria without inducing resistance. By replacing the N-terminal lipid structure, new analogues with strong activity against colistin-resistant E. coli were generated.
RSC MEDICINAL CHEMISTRY
(2022)
Review
Biochemistry & Molecular Biology
Samantha J. Bann, Ross D. Ballantine, Stephen A. Cochrane
Summary: Tridecaptins are a newly re-emerging class of non-ribosomal antibacterial peptides with potent activity against Gram-negative bacteria, acting by disrupting the proton-motive force through selective binding to the peptidoglycan precursor lipid II. Due to their linear structure, Tridecaptins are highly amenable to synthetic modification, resulting in various synthetic analogues with enhanced antimicrobial activity and improved stability towards hydrolysis. Additionally, unacylated Tridecaptins have been shown to synergistically enhance the activity of clinically relevant antibiotics by sensitizing the outer membrane.
RSC MEDICINAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Rachel V. K. Cochrane, Francesca M. Alexander, Coilin Boland, Susan K. Fetics, Martin Caffrey, Stephen A. Cochrane
CHEMICAL COMMUNICATIONS
(2020)
Article
Chemistry, Organic
Faiza Diaba, Gisela Trenchs
Summary: The first violet light-mediated synthesis of gamma- and delta-lactams from N-alkenyl trichloroacetamides is reported in this paper. The reactions are conducted in tetrahydrofuran or 2-methyltetrahydrofuran as the sole solvent without catalysts or additives, under non-anhydrous conditions in an air atmosphere where the solvent serves as the radical initiator.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Feroze Hussain, Sajjad Ahmed, Ashiq Hussain Padder, Qazi Naveed Ahmed
Summary: This study reports a novel and efficient one-pot synthesis method for mixed phosphorotrithioates, which does not require supplementary additives and shows broad applicability.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Hyunjin Oh, Ikyon Kim
Summary: A new 1,2,4-triazole-pyrrolo[1,2-a]pyrazine hybrid system, 6-acylpyrrolo[1,2-a][1,2,4]triazolo[5,1-c]pyrazine, was synthesized using a catalyst-free method. This method involved sequential exposure of pyrrole-2-carbonitrile-derived substrates to DMF-DMA and acyl hydrazide, resulting in the formation of acylated pyrazine and 1,2,4-triazole rings, enabling the installation of various substituents at specific positions on the core skeleton.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Ming Yan, Si-fan Wang, Yong-po Zhang, Jin-zhong Zhao, Zhuo Tang, Guang-xun Li
Summary: Here we developed an efficient photocatalytic approach for the convenient preparation of sulfinamides. The reaction allows for the gram-scale preparation of sulfinamides and the one-pot synthesis of various sulfonyl amides.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Farzaneh Bandehali-Naeini, Zahra Tanbakouchian, Noushin Farajinia-Lehi, Nicolas Mayer, Morteza Shiri, Martin Breugst
Summary: Two tandem catalytic systems were developed for the synthesis of novel 3,4-disubstituted maleimides using the same Ugi adducts. Different maleimide structures can be synthesized using either Pd or Cu catalysis.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Article
Chemistry, Organic
Tanya Raghava, Anjan Chattopadhyay, Subhadeep Banerjee, Nivedita Sarkar
Summary: Amine substitution of two ortho fluorine atoms of tetrafluoroterephthalonitrile through SNAr chemistry is easily achievable. But further fluorine substitution is only possible under forcing conditions, yielding valuable fluorophores for bioimaging.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)
Review
Chemistry, Organic
Anju Chadha, Santosh Kumar Padhi, Selvaraj Stella, Sowmyalakshmi Venkataraman, Thangavelu Saravanan
Summary: Alcohol dehydrogenases are enzymes that use cofactors for oxidation or reduction reactions of alcohols or carbonyl compounds. They are utilized in green chemistry and have applications in the production of pharmaceuticals. Recombinant enzymes have solved the challenge of producing purified enzymes in large quantities. Engineered alcohol dehydrogenases have been used in asymmetric synthesis in industry. Various methods have been established for regenerating expensive cofactors to make the enzymatic process more efficient and economically viable.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2024)