1
|
Mathur A, Parihar AS, Modi S, Kalra A. Photodynamic therapy for ESKAPE pathogens: An emerging approach to combat antimicrobial resistance (AMR). Microb Pathog 2023; 183:106307. [PMID: 37604213 DOI: 10.1016/j.micpath.2023.106307] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/09/2023] [Accepted: 08/14/2023] [Indexed: 08/23/2023]
Abstract
The increase in antimicrobial resistance, particularly in ESKAPE pathogens, has resulted in the dire need for new therapeutic approaches. ESKAPE is an acronym for a group of bacteria that are responsible for a majority of nosocomial and community acquired infections. The acronym stands for Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species. These pathogens are known for their ability to develop resistance to multiple antibiotics, making them difficult to treat thus posing a significant threat to public health. In light of the alarming consequences of antimicrobial resistance, it has been estimated that, in the absence of a substantial increase in the rate of development of new effective drugs, the number of casualties related to these infections will increase from about 700,000 in 2016 up to nearly 10,000,000 in 2050 [1]. One potential strategy to treat these pathogens is photodynamic therapy (PDT). In the early 20th century, Oscar Raab observed the phototoxicity of acridine red against Paramecium caudatum, while Tappenier and Jesionek demonstrated the photodynamic effects of eosin for treating cutaneous diseases. These discoveries laid the foundation for Photodynamic Therapy (PDT), which utilizes a non-toxic photosensitizer (PS) followed by targeted light irradiation for treatment [2]. PDT involves the use of a photosensitizer, a light source, and oxygen to eliminate highly active infectious pathogens such as bacteria, viruses, and fungi. PDT is known to possess several advantages including localized treatment and fewer side effects. Various photosensitizers and light sources have been assessed in different strains, showing promising results suggesting PDT to be a promising potential treatment option. PDT utilizes PS compounds with suitable light absorption that showcase effective results against the pathogens in vitro and in vivo, including BODIPY derivatives, Methylene Blue, and other dyes like porphyrin derivatives, phthalocyanines, indole derivatives, Photophrin, etc., inhibiting the growth of infections, for both in planktonic cells and in biofilms. Combination of PDT with other therapies like efflux pump inhibitors or quorum sensing inhibitors has also proven to be efficacious. However, this domain further needs to be assessed before it reaches the society.
Collapse
Affiliation(s)
| | | | - Simran Modi
- Dr. B. Lal Institute of Biotechnology, Jaipur, India
| | | |
Collapse
|
2
|
Lin X, Zhao M, Peng T, Zhang P, Shen R, Jia Y. Detection and discrimination of pathogenic bacteria with nanomaterials-based optical biosensors: A review. Food Chem 2023; 426:136578. [PMID: 37336102 DOI: 10.1016/j.foodchem.2023.136578] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/16/2023] [Accepted: 06/02/2023] [Indexed: 06/21/2023]
Abstract
Pathogenic bacteria can pose a great threat to food safety and human health. It is therefore imperative to develop a rapid, portable, and sensitive determination and discrimination method for pathogenic bacteria. Over the past few years, various nanomaterials (NMs) have been employed as desirable nanoprobes because they possess extraordinary properties that can be used for optical signal enabled detection and identification of bacteria. By means of modification, NMs can, depending on different mechanisms, sense targets directly or indirectly, which then provides an essential support for the detection and differentiation of pathogenic bacteria. In this review, recent application of NMs-based optical biosensors for food safety bacterial detection and discrimination is performed, mainly in but not limited to noble metal NMs, fluorescent NMs, and point-of-care testing (POCT). This review also focuses on future trends in bacterial detection and discrimination, and machine learning in performing intelligent rapid detection and multiple accurate identification of bacteria.
Collapse
Affiliation(s)
- Xiaodong Lin
- Zhuhai UM Science & Technology Research Institute, Zhuhai, China.
| | - Minyang Zhao
- Precision Medicine Institute, The First Affiliated Hospital of Sun Yat-Sen University, Sun Yat-Sen University, Guangzhou, China
| | - Tao Peng
- Zhuhai UM Science & Technology Research Institute, Zhuhai, China
| | - Pan Zhang
- State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China
| | - Ren Shen
- State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China
| | - Yanwei Jia
- Zhuhai UM Science & Technology Research Institute, Zhuhai, China; State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, China.
| |
Collapse
|
3
|
Oxygen-vacancy-rich molybdenum carbide MXene nanonetworks for ultrasound-triggered and capturing-enhanced sonocatalytic bacteria eradication. Biomaterials 2023; 296:122074. [PMID: 36889145 DOI: 10.1016/j.biomaterials.2023.122074] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 02/25/2023] [Accepted: 02/28/2023] [Indexed: 03/05/2023]
Abstract
Incurable bacterial infection and intractable multidrug resistance remain critical challenges in public health. A prevalent approach against bacterial infection is phototherapy including photothermal and photodynamic therapy, which is unfortunately limited by low penetration depth of light accompanied with inevitable hyperthermia and phototoxicity damaging healthy tissues. Thus, eco-friendly strategy with biocompatibility and high antimicrobial efficacy against bacteria is urgently desired. Herein, we propose and develop an oxygen-vacancy-rich MoOxin situ on fluorine-free Mo2C MXene with unique neural-network-like structure, namely MoOx@Mo2C nanonetworks, in which their desirable antibacterial effectiveness originates from bacteria-capturing ability and robust reactive oxygen species (ROS) generation under precise ultrasound (US) irradiation. The high-performance, broad-spectrum microbicidal activity of MoOx@Mo2C nanonetworks without damaging normal tissues is validated based on systematic in vitro and in vivo assessments. Additionally, RNA sequencing analysis illuminates that the underlying bactericidal mechanism is attributed to the chaotic homeostasis and disruptive peptide metabolisms on bacteria instigated by MoOx@Mo2C nanonetworks under US stimulation. Considering antibacterial efficiency and a high degree of biosafety, we envision that the MoOx@Mo2C nanonetworks can serve as a distinct antimicrobial nanosystem to fight against diverse pathogenic bacteria, especially eradicating multidrug-resistant bacteria-induced deep tissue infection.
Collapse
|
4
|
N-Derivatives of ( Z)-Methyl 3-(4-Oxo-2-thioxothiazolidin-5-ylidene)methyl)-1 H-indole-2-carboxylates as Antimicrobial Agents-In Silico and In Vitro Evaluation. Pharmaceuticals (Basel) 2023; 16:ph16010131. [PMID: 36678628 PMCID: PMC9865890 DOI: 10.3390/ph16010131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 01/18/2023] Open
Abstract
Herein, we report the experimental evaluation of the antimicrobial activity of seventeen new (Z)-methyl 3-(4-oxo-2-thioxothiazolidin-5-ylidene)methyl)-1H-indole-2-carboxylate derivatives. All tested compounds exhibited antibacterial activity against eight Gram-positive and Gram-negative bacteria. Their activity exceeded those of ampicillin as well as streptomycin by 10-50 fold. The most sensitive bacterium was En. Cloacae, while E. coli was the most resistant one, followed by M. flavus. The most active compound appeared to be compound 8 with MIC at 0.004-0.03 mg/mL and MBC at 0.008-0.06 mg/mL. The antifungal activity of tested compounds was good to excellent with MIC in the range of 0.004-0.06 mg/mL, with compound 15 being the most potent. T. viride was the most sensitive fungal, while A. fumigatus was the most resistant one. Docking studies revealed that the inhibition of E. coli MurB is probably responsible for their antibacterial activity, while 14a-lanosterol demethylase of CYP51Ca is involved in the mechanism of antifungal activity. Furthermore, drug-likeness and ADMET profile prediction were performed. Finally, the cytotoxicity studies were performed for the most active compounds using MTT assay against normal MRC5 cells.
Collapse
|
5
|
Duca M, Haksar D, van Neer J, Thies-Weesie DM, Martínez-Alarcón D, de Cock H, Varrot A, Pieters RJ. Multivalent Fucosides Targeting β-Propeller Lectins from Lung Pathogens with Promising Anti-Adhesive Properties. ACS Chem Biol 2022; 17:3515-3526. [PMID: 36414265 PMCID: PMC9764287 DOI: 10.1021/acschembio.2c00708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Fungal and bacterial pathogens causing lung infections often use lectins to mediate adhesion to glycoconjugates at the surface of host tissues. Given the rapid emergence of resistance to the treatments in current use, β-propeller lectins such as FleA from Aspergillus fumigatus, SapL1 from Scedosporium apiospermum, and BambL from Burkholderia ambifaria have become appealing targets for the design of anti-adhesive agents. In search of novel and cheap anti-infectious agents, we synthesized multivalent compounds that can display up to 20 units of fucose, the natural ligand. We obtained nanomolar inhibitors that are several orders of magnitude stronger than their monovalent analogue according to several biophysical techniques (i.e., fluorescence polarization, isothermal titration calorimetry, and bio-layer interferometry). The reason for high affinity might be attributed to a strong aggregating mechanism, which was examined by analytical ultracentrifugation. Notably, the fucosylated inhibitors reduced the adhesion of A. fumigatus spores to lung epithelial cells when administered 1 h before or after the infection of human lung epithelial cells. For this reason, we propose them as promising anti-adhesive drugs for the prevention and treatment of aspergillosis and related microbial lung infections.
Collapse
Affiliation(s)
- Margherita Duca
- Department
of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical
Sciences, Utrecht University, NL-3508 TB Utrecht, The Netherlands,Department
of Biology, Utrecht University, Padualaan 8, 3584 CS Utrecht, The Netherlands,Univ.
Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France
| | - Diksha Haksar
- Department
of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical
Sciences, Utrecht University, NL-3508 TB Utrecht, The Netherlands
| | - Jacq van Neer
- Department
of Biology, Utrecht University, Padualaan 8, 3584 CS Utrecht, The Netherlands
| | - Dominique M.E. Thies-Weesie
- Debye
Institute for Nanomaterials Science, Utrecht
University, Padualaan
8, 3584 CS Utrecht, The Netherlands
| | | | - Hans de Cock
- Department
of Biology, Utrecht University, Padualaan 8, 3584 CS Utrecht, The Netherlands,
| | | | - Roland J. Pieters
- Department
of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical
Sciences, Utrecht University, NL-3508 TB Utrecht, The Netherlands,
| |
Collapse
|
6
|
Muleta F, Desalegn T, Eswaramoorthy R, Garg A. Synthesis, characterization, in-silico, and in-vitro biological studies of Cu(II), Zn(II) complexes of semicarbazone, thiosemicarbazone derivatives of dehydrozingerone. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
7
|
The Exploration of Complement-Resistance Mechanisms of Pathogenic Gram-Negative Bacteria to Support the Development of Novel Therapeutics. Pathogens 2022; 11:pathogens11080931. [PMID: 36015050 PMCID: PMC9412335 DOI: 10.3390/pathogens11080931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/15/2022] [Accepted: 08/16/2022] [Indexed: 11/17/2022] Open
Abstract
Resistance to antibiotics in Bacteria is one of the biggest threats to human health. After decades of attempting to isolate or design antibiotics with novel mechanisms of action against bacterial pathogens, few approaches have been successful. Antibacterial drug discovery is now moving towards targeting bacterial virulence factors, especially immune evasion factors. Gram-negative bacteria present some of the most significant challenges in terms of antibiotic resistance. However, they are also able to be eliminated by the component of the innate immune system known as the complement system. In response, Gram-negative bacteria have evolved a variety of mechanisms by which they are able to evade complement and cause infection. Complement resistance mechanisms present some of the best novel therapeutic targets for defending against highly antibiotic-resistant pathogenic bacterial infections.
Collapse
|
8
|
Wyllie JA, McKay MV, Barrow AS, Soares da Costa TP. Biosynthesis of uridine diphosphate N-Acetylglucosamine: An underexploited pathway in the search for novel antibiotics? IUBMB Life 2022; 74:1232-1252. [PMID: 35880704 PMCID: PMC10087520 DOI: 10.1002/iub.2664] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 07/04/2022] [Indexed: 11/06/2022]
Abstract
Although the prevalence of antibiotic resistance is increasing at an alarming rate, there are a dwindling number of effective antibiotics available. Thus, the development of novel antibacterial agents should be of utmost importance. Peptidoglycan biosynthesis has been and is still an attractive source for antibiotic targets; however, there are several components that remain underexploited. In this review, we examine the enzymes involved in the biosynthesis of one such component, UDP-N-acetylglucosamine, an essential building block and precursor of bacterial peptidoglycan. Furthermore, given the presence of a similar biosynthesis pathway in eukaryotes, we discuss the current knowledge on the differences and similarities between the bacterial and eukaryotic enzymes. Finally, this review also summarises the recent advances made in the development of inhibitors targeting the bacterial enzymes.
Collapse
Affiliation(s)
- Jessica A Wyllie
- School of Agriculture, Food and Wine, Waite Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Mirrin V McKay
- School of Agriculture, Food and Wine, Waite Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Andrew S Barrow
- School of Agriculture, Food and Wine, Waite Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Tatiana P Soares da Costa
- School of Agriculture, Food and Wine, Waite Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| |
Collapse
|
9
|
Jalil MB, Al Atbee MYN. The prevalence of multiple drug resistance
Escherichia coli
and
Klebsiella pneumoniae
isolated from patients with urinary tract infections. J Clin Lab Anal 2022; 36:e24619. [PMID: 35870190 PMCID: PMC9459318 DOI: 10.1002/jcla.24619] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 06/14/2022] [Accepted: 07/12/2022] [Indexed: 11/09/2022] Open
Affiliation(s)
- Mays B. Jalil
- Department of Medical Laboratory Techniques Al‐Kunooze University College Basrah Iraq
| | | |
Collapse
|
10
|
Proteome Exploration of
Legionella pneumophila
To Identify Novel Therapeutics: a Hierarchical Subtractive Genomics and Reverse Vaccinology Approach. Microbiol Spectr 2022; 10:e0037322. [PMID: 35863001 PMCID: PMC9430848 DOI: 10.1128/spectrum.00373-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Legionella pneumophila
is a human pathogen distributed worldwide, causing Legionnaires’ disease (LD), a severe form of pneumonia and respiratory tract infection.
L. pneumophila
is emerging as an antibiotic-resistant strain, and controlling LD is now difficult. Hence, developing novel drugs and vaccines against
L. pneumophila
is a major research priority.
Collapse
|
11
|
McKenna CH, Asgari D, Crippen TL, Zheng L, Sherman RA, Tomberlin JK, Meisel RP, Tarone AM. Gene expression in Lucilia sericata (Diptera: Calliphoridae) larvae exposed to Pseudomonas aeruginosa and Acinetobacter baumannii identifies shared and microbe-specific induction of immune genes. INSECT MOLECULAR BIOLOGY 2022; 31:85-100. [PMID: 34613655 DOI: 10.1111/imb.12740] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 09/24/2021] [Accepted: 09/26/2021] [Indexed: 06/13/2023]
Abstract
Antibiotic resistance is a continuing challenge in medicine. There are various strategies for expanding antibiotic therapeutic repertoires, including the use of blow flies. Their larvae exhibit strong antibiotic and antibiofilm properties that alter microbiome communities. One species, Lucilia sericata, is used to treat problematic wounds due to its debridement capabilities and its excretions and secretions that kill some pathogenic bacteria. There is much to be learned about how L. sericata interacts with microbiomes at the molecular level. To address this deficiency, gene expression was assessed after feeding exposure (1 h or 4 h) to two clinically problematic pathogens: Pseudomonas aeruginosa and Acinetobacter baumannii. The results identified immunity-related genes that were differentially expressed when exposed to these pathogens, as well as non-immune genes possibly involved in gut responses to bacterial infection. There was a greater response to P. aeruginosa that increased over time, while few genes responded to A. baumannii exposure, and expression was not time-dependent. The response to feeding on pathogens indicates a few common responses and features distinct to each pathogen, which is useful in improving the wound debridement therapy and helps to develop biomimetic alternatives.
Collapse
Affiliation(s)
- C H McKenna
- Department of Entomology, Texas A&M University, College Station, TX, USA
| | - D Asgari
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA
| | - T L Crippen
- Southern Plains Agricultural Research Center, Agricultural Research Service, US Department of Agriculture, College Station, TX, USA
| | - L Zheng
- Department of Entomology, Texas A&M University, College Station, TX, USA
| | - R A Sherman
- BioTherapeutics, Education and Research (BTER) Foundation, Irvine, CA, USA
- Monarch Labs, Irvine, CA, USA
| | - J K Tomberlin
- Department of Entomology, Texas A&M University, College Station, TX, USA
| | - R P Meisel
- Department of Biology and Biochemistry, University of Houston, Houston, TX, USA
| | - A M Tarone
- Department of Entomology, Texas A&M University, College Station, TX, USA
| |
Collapse
|
12
|
Katoch O, Khurana S, Mathur P, Malhotra R. Antimicrobial Resistance in Enterobacteriaceae Bacteria Causing Infection in Trauma Patients: A 5-Year Experience from a Tertiary Trauma Center. J Lab Physicians 2022; 13:296-308. [PMID: 34975247 PMCID: PMC8714315 DOI: 10.1055/s-0041-1730819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Introduction Multiple drug resistance emergences among bacteria at an alarming rate worldwide are posing a serious threat to the treatment benefits that have been achieved with antibiotics. This crisis is due to the inappropriate and overuse of existing antibiotics. We evaluated the antimicrobial resistance pattern of Enterobacteriaceae pathogens isolated from intensive care units (ICUs), wards, and outpatient department (OPD) patients. Objectives The aim of the study is to determine the antimicrobial resistance pattern in bacteria of Enterobacteriaceae family. Material and Methods This is a retrospective study conducted at a tertiary care level-1 trauma center in the capital city of India. We collected all the retrospective data of 5 years from the laboratory information system software of the microbiology laboratory. The retrospective data included patients' details, samples detail, organism's identification, and their antimicrobial susceptibility testing, done by Vitek2 compact system and disk diffusion test according to each year's Clinical and Laboratory Standards Institute (CLSI) guidelines. This study included the interpretation of zone diameters and minimum inhibitory concentrations of all isolates according to CLSI guidelines, 2018. Results Among all the Enterobacteriaceae , Klebsiella spp. was the most commonly isolated pathogen, followed by Escherichia coli and Enterobacter spp. in ICUs and wards, while in OPD patients E. coli was the most commonly isolated pathogen, followed by Klebsiella spp. and Enterobacter spp. Enterobacteriaceae isolates remained resistant to all classes of cephalosporins in all settings. In addition, β lactam and β-lactamase inhibitor remained less effective. Carbapenems showed less resistance than quinolones and aminoglycosides. Among the different antimicrobial agents, tigecycline proved most effective in all settings; however, it showed more resistance than other studies. Conclusion Tigecycline proved effective among different multidrug resistance bacteria. Multidrug resistance in bacteria leads to prolonged hospital stays as well as makes the treatment less cost effective. Proper and judicious use of antimicrobials is the need of the hour.
Collapse
Affiliation(s)
- Omika Katoch
- Department of Laboratory Medicine, JPNA Trauma Centre, All India Institute of Medical Sciences, New Delhi, India
| | - Surbhi Khurana
- Department of Laboratory Medicine, JPNA Trauma Centre, All India Institute of Medical Sciences, New Delhi, India
| | - Purva Mathur
- Department of Laboratory Medicine, JPNA Trauma Centre, All India Institute of Medical Sciences, New Delhi, India
| | - Rajesh Malhotra
- Department of Orthopaedics, JPNA Trauma Centre, All India Institute of Medical Sciences, New Delhi, India
| |
Collapse
|
13
|
Elsayed AM, El‐Remaily MAEAAA, Salama KSM, Abdelhamid AA. Utility of pyrrole‐2‐thioacetohydrazide in synthesis of new heterocyclic compounds with promising antimicrobial activities and molecular docking studies. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4392] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ahmed M. Elsayed
- Department of Chemistry, Faculty of Science Sohag University Sohag Egypt
| | | | - Kaoud S. M. Salama
- Department of Chemistry, Faculty of Science Sohag University Sohag Egypt
| | - Antar A. Abdelhamid
- Department of Chemistry, Faculty of Science Sohag University Sohag Egypt
- Chemistry Department, Faculty of Science Albaha University Albaha Saudi Arabia
| |
Collapse
|
14
|
Adaptive responses of Pseudomonas aeruginosa to treatment with antibiotics. Antimicrob Agents Chemother 2021; 66:e0087821. [PMID: 34748386 DOI: 10.1128/aac.00878-21] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Pseudomonas aeruginosa is among the highest priority pathogens for drug development, because of its resistance to antibiotics, extraordinary adaptability, and persistence. Anti-pseudomonal research is strongly encouraged to address the acute scarcity of innovative antimicrobial lead structures. In an effort to understand the physiological response of P. aeruginosa to clinically relevant antibiotics, we investigated the proteome after exposure to ciprofloxacin, levofloxacin, rifampicin, gentamicin, tobramycin, azithromycin, tigecycline, polymyxin B, colistin, ceftazidime, meropenem, and piperacillin/tazobactam. We further investigated the response to CHIR-90, which represents a promising class of lipopolysaccharide biosynthesis inhibitors currently under evaluation. Radioactive pulse-labeling of newly synthesized proteins followed by 2D-PAGE was used to monitor the acute response of P. aeruginosa to antibiotic treatment. The proteomic profiles provide insights into the cellular defense strategies for each antibiotic. A mathematical comparison of these response profiles based on upregulated marker proteins revealed similarities of responses to antibiotics acting on the same target area. This study provides insights into the effects of commonly used antibiotics on P. aeruginosa and lays the foundation for the comparative analysis of the impact of novel compounds with precedented and unprecedented modes of action.
Collapse
|
15
|
McCuskey SR, Chatsirisupachai J, Zeglio E, Parlak O, Panoy P, Herland A, Bazan GC, Nguyen TQ. Current Progress of Interfacing Organic Semiconducting Materials with Bacteria. Chem Rev 2021; 122:4791-4825. [PMID: 34714064 DOI: 10.1021/acs.chemrev.1c00487] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Microbial bioelectronics require interfacing microorganisms with electrodes. The resulting abiotic/biotic platforms provide the basis of a range of technologies, including energy conversion and diagnostic assays. Organic semiconductors (OSCs) provide a unique strategy to modulate the interfaces between microbial systems and external electrodes, thereby improving the performance of these incipient technologies. In this review, we explore recent progress in the field on how OSCs, and related materials capable of charge transport, are being used within the context of microbial systems, and more specifically bacteria. We begin by examining the electrochemical communication modes in bacteria and the biological basis for charge transport. Different types of synthetic organic materials that have been designed and synthesized for interfacing and interrogating bacteria are discussed next, followed by the most commonly used characterization techniques for evaluating transport in microbial, synthetic, and hybrid systems. A range of applications is subsequently examined, including biological sensors and energy conversion systems. The review concludes by summarizing what has been accomplished so far and suggests future design approaches for OSC bioelectronics materials and technologies that hybridize characteristic properties of microbial and OSC systems.
Collapse
Affiliation(s)
- Samantha R McCuskey
- Department of Chemistry, National University of Singapore, Singapore 119077, Singapore
| | - Jirat Chatsirisupachai
- Center for Polymers and Organic Solids & Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States.,Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Erica Zeglio
- Division of Micro and Nanosystems, School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, Stockholm 17177, Sweden
| | - Onur Parlak
- Dermatology and Venereology Division, Department of Medicine(Solna), Karolinska Institute, Stockholm 17177, Sweden.,AIMES Center of Integrated Medical and Engineering Sciences, Department of Neuroscience, Karolinska Institute, Stockholm 17177, Sweden
| | - Patchareepond Panoy
- Center for Polymers and Organic Solids & Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States.,Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong 21210, Thailand
| | - Anna Herland
- Division of Micro and Nanosystems, School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, Stockholm 17177, Sweden.,AIMES Center of Integrated Medical and Engineering Sciences, Department of Neuroscience, Karolinska Institute, Stockholm 17177, Sweden
| | - Guillermo C Bazan
- Department of Chemistry, National University of Singapore, Singapore 119077, Singapore
| | - Thuc-Quyen Nguyen
- Center for Polymers and Organic Solids & Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| |
Collapse
|
16
|
Fouad SA, El-Gendey MS, Ahmed EM, Hessein SA, Ammar YA, Zaki YH. Convenient Synthesis of Some New Thiophene, Pyrazole, and Thiazole Derivatives Bearing Biologically Active Sulfonyl Guanidine Moiety. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2021.1988999] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Sawsan A. Fouad
- Department of Chemistry, Faculty of Science, Al-Azhar University (Girls), Cairo, Egypt
| | - Marwa S. El-Gendey
- Department of Chemistry, Faculty of Science, Al-Azhar University (Girls), Cairo, Egypt
- Department of Chemistry, Turabah University College, Taif University, Turabah, Saudi Arabia
| | - Entsar M. Ahmed
- Department of Chemistry, Faculty of Science, Al-Azhar University (Girls), Cairo, Egypt
| | - Sadia A. Hessein
- Department of Chemistry, Faculty of Science, Al-Azhar University (Girls), Cairo, Egypt
| | - Yousry A. Ammar
- Department of Chemistry, Faculty of Science, Al-Azhar University (Boys), Cairo, Egypt
| | - Yasser H. Zaki
- Department of Chemistry, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
- Department of Chemistry, Faculty of Science and Humanity Studies, Al-Quwayiyah, Shaqra University, Al-Quwayiyah, Saudi Arabia
| |
Collapse
|
17
|
Huebinger RM, Do DH, Carlson DL, Yao X, Stones DH, De Souza Santos M, Vaz DP, Keen E, Wolf SE, Minei JP, Francis KP, Orth K, Krachler AM. Bacterial adhesion inhibitor prevents infection in a rodent surgical incision model. Virulence 2021; 11:695-706. [PMID: 32490711 PMCID: PMC7550027 DOI: 10.1080/21505594.2020.1772652] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Surgical site infection risk continues to increase due to lack of efficacy in current standard of care drugs. New methods to treat or prevent antibiotic-resistant bacterial infections are needed. Multivalent Adhesion Molecules (MAM) are bacterial adhesins required for virulence. We developed a bacterial adhesion inhibitor using recombinant MAM fragment bound to polymer scaffold, mimicking MAM7 display on the bacterial surface. Here, we test MAM7 inhibitor efficacy to prevent Gram-positive and Gram-negative infections. Using a rodent model of surgical infection, incision sites were infected with antibiotic-resistant bioluminescent strains of Staphylococcus aureus or Pseudomonas aeruginosa. Infections were treated with MAM7 inhibitor or control suspension. Bacterial abundance was quantified for nine days post infection. Inflammatory responses and histology were characterized using fixed tissue sections. MAM7 inhibitor treatment decreased burden of S. aureus and P. aeruginosa below detection threshold. Bacterial load of groups treated with control were significantly higher than MAM7 inhibitor-treated groups. Treatment with inhibitor reduced colonization of clinically-relevant pathogens in an in vivo model of surgical infection. Use of MAM7 inhibitor to block initial adhesion of bacteria to tissue in surgical incisions may reduce infection rates, presenting a strategy to mitigate overuse of antibiotics to prevent surgical site infections.
Collapse
Affiliation(s)
- R M Huebinger
- Department of Surgery, Division of General and Acute Care Surgery, University of Texas Southwestern Medical Center , Dallas, TX, USA
| | - D H Do
- Department of Surgery, Division of General and Acute Care Surgery, University of Texas Southwestern Medical Center , Dallas, TX, USA
| | - D L Carlson
- Department of Surgery, Division of General and Acute Care Surgery, University of Texas Southwestern Medical Center , Dallas, TX, USA
| | - X Yao
- Department of Surgery, Division of General and Acute Care Surgery, University of Texas Southwestern Medical Center , Dallas, TX, USA
| | - D H Stones
- School of Biosciences, Institute of Microbiology and Infection, University of Birmingham , Birmingham, UK.,University of Gloucestershire, School of Natural and Social Sciences , Cheltenham, UK
| | - M De Souza Santos
- Department of Molecular Biology, University of Texas Southwestern Medical Center , Dallas, TX, USA
| | - D P Vaz
- Department of Microbiology and Molecular Genetics, University of Texas Health Science Center at Houston, McGovern Medical School , Houston, TX, USA
| | - E Keen
- School of Biosciences, Institute of Microbiology and Infection, University of Birmingham , Birmingham, UK
| | - S E Wolf
- Department of Surgery, Division of General and Acute Care Surgery, University of Texas Southwestern Medical Center , Dallas, TX, USA.,UTMB Department of Surgery, Shriners Hospitals for Children , Galveston, TX, USA
| | - J P Minei
- Department of Surgery, Division of General and Acute Care Surgery, University of Texas Southwestern Medical Center , Dallas, TX, USA
| | | | - K Orth
- Department of Molecular Biology, University of Texas Southwestern Medical Center , Dallas, TX, USA.,Department of Biochemistry, University of Texas Southwestern Medical Center , Dallas, TX, USA.,Howard Hughes Medical Institute, University of Texas Southwestern Medical Center , Dallas, TX, USA
| | - A M Krachler
- Department of Microbiology and Molecular Genetics, University of Texas Health Science Center at Houston, McGovern Medical School , Houston, TX, USA
| |
Collapse
|
18
|
Caméléna F, Morel F, Merimèche M, Decousser JW, Jacquier H, Clermont O, Darty M, Mainardis M, Cambau E, Tenaillon O, Denamur E, Berçot B. Genomic characterization of 16S rRNA methyltransferase-producing Escherichia coli isolates from the Parisian area, France. J Antimicrob Chemother 2021; 75:1726-1735. [PMID: 32300786 DOI: 10.1093/jac/dkaa105] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 01/15/2020] [Accepted: 02/27/2020] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND The resistance to all aminoglycosides (AGs) conferred by 16S rRNA methyltransferase enzymes (16S-RMTases) is a major public health concern. OBJECTIVES To characterize the resistance genotype, its genetic environment and plasmid support, and the phylogenetic relatedness of 16S-RMTase-producing Escherichia coli from France. METHODS We screened 137 E. coli isolates resistant to all clinically relevant AGs from nine Parisian hospitals for 16S-RMTases. WGS was performed on clinical isolates with high-level AG resistance (MIC ≥256 mg/L) and their transformants. RESULTS Thirty of the 137 AG-resistant E. coli produced 16S-RMTases: 11 ArmA, 18 RmtB and 1 RmtC. The 16S-RMTase producers were also resistant to third-generation cephalosporins (90% due to a blaCTX-M gene), co-trimoxazole, fluoroquinolones and carbapenems (blaNDM and blaVIM genes) in 97%, 83%, 70% and 10% of cases, respectively. Phylogenomic diversity was high in ArmA producers, with 10 different STs, but a similar genetic environment, with the Tn1548 transposon carried by a plasmid closely related to pCTX-M-3 in 6/11 isolates. Conversely, RmtB producers belonged to 12 STs, the most frequent being ST405 and ST complex (STc) 10 (four and four isolates, respectively). The rmtB gene was carried by IncF plasmids in 10 isolates and was found in different genetic environments. The rmtC gene was carried by the pNDM-US plasmid. CONCLUSIONS ArmA and RmtB are the predominant 16S-RMTases in France, but their spread follows two different patterns: (i) dissemination of a conserved genetic support carrying armA in E. coli with high levels of genomic diversity; and (ii) various genetic environments surrounding rmtB in clonally related E. coli.
Collapse
Affiliation(s)
- François Caméléna
- AP-HP, Service de Microbiologie, Hôpital Saint-Louis, Paris, France.,Université de Paris, INSERM, IAME, Paris, France
| | - Florence Morel
- Université de Paris, INSERM, IAME, Paris, France.,AP-HP, Service de Bactériologie-Virologie, Hôpital Lariboisière, Paris, France
| | - Manel Merimèche
- AP-HP, Service de Microbiologie, Hôpital Saint-Louis, Paris, France.,Université de Paris, INSERM, IAME, Paris, France
| | - Jean-Winoc Decousser
- Université de Paris, INSERM, IAME, Paris, France.,AP-HP, Service de Bactériologie et d'Hygiène Hospitalière, Hôpital Henri Mondor, Créteil, France
| | - Hervé Jacquier
- Université de Paris, INSERM, IAME, Paris, France.,AP-HP, Service de Bactériologie-Virologie, Hôpital Lariboisière, Paris, France
| | | | - Mélanie Darty
- AP-HP, Service de Bactériologie et d'Hygiène Hospitalière, Hôpital Henri Mondor, Créteil, France
| | - Mary Mainardis
- AP-HP, Service de Microbiologie, Hôpital Saint-Louis, Paris, France
| | - Emmanuelle Cambau
- Université de Paris, INSERM, IAME, Paris, France.,AP-HP, Service de Bactériologie-Virologie, Hôpital Lariboisière, Paris, France
| | | | - Erick Denamur
- Université de Paris, INSERM, IAME, Paris, France.,AP-HP, Laboratoire de Génétique Moléculaire, Hôpital Bichat, Paris, France
| | - Béatrice Berçot
- AP-HP, Service de Microbiologie, Hôpital Saint-Louis, Paris, France.,Université de Paris, INSERM, IAME, Paris, France
| | | |
Collapse
|
19
|
Nguyen HT, Morshed MT, Vuong D, Crombie A, Lacey E, Garg S, Pi H, Woolford L, Venter H, Page SW, Piggott AM, Trott DJ, Ogunniyi AD. Evaluation of Benzguinols as Next-Generation Antibiotics for the Treatment of Multidrug-Resistant Bacterial Infections. Antibiotics (Basel) 2021; 10:antibiotics10060727. [PMID: 34208698 PMCID: PMC8233939 DOI: 10.3390/antibiotics10060727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/10/2021] [Accepted: 06/10/2021] [Indexed: 11/16/2022] Open
Abstract
Our recent focus on the “lost antibiotic” unguinol and related nidulin-family fungal natural products identified two semisynthetic derivatives, benzguinols A and B, with unexpected in vitro activity against Staphylococcus aureus isolates either susceptible or resistant to methicillin. Here, we show further activity of the benzguinols against methicillin-resistant isolates of the animal pathogen Staphylococcus pseudintermedius, with minimum inhibitory concentration (MIC) ranging 0.5–1 μg/mL. When combined with sub-inhibitory concentrations of colistin, the benzguinols demonstrated synergy against Gram-negative reference strains of Acinetobacter baumannii, Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa (MICs of 1–2 μg/mL in the presence of colistin), whereas the benzguinols alone had no activity. Administration of three intraperitoneal (IP) doses of 20 mg/kg benzguinol A or B to mice did not result in any obvious adverse clinical or pathological evidence of acute toxicity. Importantly, mice that received three 20 mg/kg IP doses of benzguinol A or B at 4 h intervals exhibited significantly reduced bacterial loads and longer survival times than vehicle-only treated mice in a bioluminescent S. aureus murine sepsis challenge model. We conclude that the benzguinols are potential candidates for further development for specific treatment of serious bacterial infections as both stand-alone antibiotics and in combination with existing antibiotic classes.
Collapse
Affiliation(s)
- Hang Thi Nguyen
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, Roseworthy Campus, The University of Adelaide, Roseworthy, SA 5371, Australia; (H.T.N.); (H.P.)
- Department of Pharmacology, Toxicology, Internal Medicine and Diagnostics, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi 100000, Vietnam
| | - Mahmud T. Morshed
- Department of Molecular Sciences, Macquarie University, Sydney, NSW 2109, Australia; (M.T.M.); (E.L.); (A.M.P.)
| | - Daniel Vuong
- Microbial Screening Technologies Pty. Ltd., Smithfield, NSW 2164, Australia; (D.V.); (A.C.)
| | - Andrew Crombie
- Microbial Screening Technologies Pty. Ltd., Smithfield, NSW 2164, Australia; (D.V.); (A.C.)
| | - Ernest Lacey
- Department of Molecular Sciences, Macquarie University, Sydney, NSW 2109, Australia; (M.T.M.); (E.L.); (A.M.P.)
- Microbial Screening Technologies Pty. Ltd., Smithfield, NSW 2164, Australia; (D.V.); (A.C.)
| | - Sanjay Garg
- Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia;
| | - Hongfei Pi
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, Roseworthy Campus, The University of Adelaide, Roseworthy, SA 5371, Australia; (H.T.N.); (H.P.)
| | - Lucy Woolford
- School of Animal and Veterinary Sciences, Roseworthy Campus, The University of Adelaide, Roseworthy, SA 5371, Australia;
| | - Henrietta Venter
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia;
| | - Stephen W. Page
- Advanced Veterinary Therapeutics, Newtown, NSW 2042, Australia;
| | - Andrew M. Piggott
- Department of Molecular Sciences, Macquarie University, Sydney, NSW 2109, Australia; (M.T.M.); (E.L.); (A.M.P.)
| | - Darren J. Trott
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, Roseworthy Campus, The University of Adelaide, Roseworthy, SA 5371, Australia; (H.T.N.); (H.P.)
- Correspondence: (D.J.T.); (A.D.O.); Tel.: +61-883-137-989 (D.J.T.); +61-432-331-914 (A.D.O.)
| | - Abiodun D. Ogunniyi
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, Roseworthy Campus, The University of Adelaide, Roseworthy, SA 5371, Australia; (H.T.N.); (H.P.)
- Correspondence: (D.J.T.); (A.D.O.); Tel.: +61-883-137-989 (D.J.T.); +61-432-331-914 (A.D.O.)
| |
Collapse
|
20
|
Mukherjee M, Laird E, Gentry TJ, Brooks JP, Karthikeyan R. Increased Antimicrobial and Multidrug Resistance Downstream of Wastewater Treatment Plants in an Urban Watershed. Front Microbiol 2021; 12:657353. [PMID: 34108949 PMCID: PMC8181147 DOI: 10.3389/fmicb.2021.657353] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 04/27/2021] [Indexed: 01/21/2023] Open
Abstract
Development and spread of antimicrobial resistance (AMR) and multidrug resistance (MDR) through propagation of antibiotic resistance genes (ARG) in various environments is a global emerging public health concern. The role of wastewater treatment plants (WWTPs) as hot spots for the dissemination of AMR and MDR has been widely pointed out by the scientific community. In this study, we collected surface water samples from sites upstream and downstream of two WWTP discharge points in an urban watershed in the Bryan-College Station (BCS), Texas area, over a period of nine months. E. coli isolates were tested for resistance to ampicillin, tetracycline, sulfamethoxazole, ciprofloxacin, cephalothin, cefoperazone, gentamycin, and imipenem using the Kirby-Bauer disc diffusion method. Antimicrobial resistant heterotrophic bacteria were cultured on R2A media amended with ampicillin, ciprofloxacin, tetracycline, and sulfamethoxazole for analyzing heterotrophic bacteria capable of growth on antibiotic-containing media. In addition, quantitative real-time polymerase chain reaction (qPCR) method was used to measure eight ARG – tetA, tetW, aacA, ampC, mecA, ermA, blaTEM, and intI1 in the surface water collected at each time point. Significant associations (p < 0.05) were observed between the locations of sampling sites relative to WWTP discharge points and the rate of E. coli isolate resistance to tetracycline, ampicillin, cefoperazone, ciprofloxacin, and sulfamethoxazole together with an increased rate of isolate MDR. The abundance of antibiotic-resistant heterotrophs was significantly greater (p < 0.05) downstream of WWTPs compared to upstream locations for all tested antibiotics. Consistent with the results from the culture-based methods, the concentrations of all ARG were substantially higher in the downstream sites compared to the upstream sites, particularly in the site immediately downstream of the WWTP effluent discharges (except mecA). In addition, the Class I integron (intI1) genes were detected in high amounts at all sites and all sampling points, and were about ∼20 times higher in the downstream sites (2.5 × 107 copies/100 mL surface water) compared to the upstream sites (1.2 × 106 copies/100 mL surface water). Results suggest that the treated WWTP effluent discharges into surface waters can potentially contribute to the occurrence and prevalence of AMR in urban watersheds. In addition to detecting increased ARG in the downstream sites by qPCR, findings from this study also report an increase in viable AMR (HPC) and MDR (E. coli) in these sites. This data will benefit establishment of improved environmental regulations and practices to help manage AMR/MDR and ARG discharges into the environment, and to develop mitigation strategies and effective treatment of wastewater.
Collapse
Affiliation(s)
- Maitreyee Mukherjee
- School of Biological, Environmental, and Earth Sciences, The University of Southern Mississippi, Long Beach, MS, United States.,Department of Soil and Crop Sciences, Texas A&M University, College Station TX, United States
| | - Edward Laird
- Department of Soil and Crop Sciences, Texas A&M University, College Station TX, United States
| | - Terry J Gentry
- Department of Soil and Crop Sciences, Texas A&M University, College Station TX, United States
| | - John P Brooks
- USDA-ARS, Mississippi State, Starkville, MS, United States
| | | |
Collapse
|
21
|
Elevated Incidences of Antimicrobial Resistance and Multidrug Resistance in the Maumee River (Ohio, USA), a Major Tributary of Lake Erie. Microorganisms 2021; 9:microorganisms9050911. [PMID: 33923266 PMCID: PMC8146589 DOI: 10.3390/microorganisms9050911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 04/20/2021] [Accepted: 04/22/2021] [Indexed: 11/30/2022] Open
Abstract
Maumee River, the major tributary in the western basin of Lake Erie, serves as one of major sources of freshwater in the area, supplying potable, recreational, and industrial water. In this study we collected water samples from four sites in the Maumee River Bay between 2016–2017 and E. coli was isolated, enumerated, and analyzed for antimicrobial resistance (AMR) and multidrug resistance (MDR). Strikingly, 95% of the total isolates were found to be resistant to at least one antibiotic. A very high resistance to the drugs cephalothin (95.3%), ampicillin (38.3%), tetracycline (8.8%), gentamicin (8.2%), ciprofloxacin (4.2%), cefoperazone (4%), and sulfamethoxazole (1.5%) was observed within isolates from all four sampling sites. Percentages of AMR and MDR was consistently very high in the summer and fall months, whereas it was observed to be lowest in the winter. A remarkably high number of the isolates were detected to be MDR—95% resistant to ≥1 antibiotic, 43% resistant to ≥2 antibiotics, 15% resistant to ≥3 antibiotics, 4.9% resistant to ≥4 antibiotic and 1.2% resistant to ≥5 antibiotics. This data will serve in better understanding the environmental occurrence and dissemination of AMR/MDR in the area and assist in improving and establishing control measures.
Collapse
|
22
|
Nguyen HT, Venter H, Veltman T, Williams R, O'Donovan LA, Russell CC, McCluskey A, Page SW, Ogunniyi AD, Trott DJ. In vitro synergistic activity of NCL195 in combination with colistin against Gram-negative bacterial pathogens. Int J Antimicrob Agents 2021; 57:106323. [PMID: 33746046 DOI: 10.1016/j.ijantimicag.2021.106323] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 02/01/2021] [Accepted: 03/13/2021] [Indexed: 12/21/2022]
Abstract
In this study, the potential of using the novel antibiotic NCL195 combined with subinhibitory concentrations of colistin against infections caused by Gram-negative bacteria (GNB) was investigated. We showed synergistic activity of the combination NCL195 + colistin against clinical multidrug-resistant GNB pathogens with minimum inhibitory concentrations (MICs) for NCL195 ranging from 0.5-4 μg/mL for Acinetobacter baumannii, Escherichia coli, Klebsiella pneumoniae and Pseudomonas aeruginosa, whereas NCL195 alone had no activity. Transmission electron microscopy of the membrane morphology of E. coli and P. aeruginosa after single colistin or combination drug treatment showed marked ultrastructural changes most frequently in the cell envelope. Exposure to NCL195 alone did not show any change compared with untreated control cells, whereas treatment with the NCL195 + colistin combination caused more damage than colistin alone. Direct evidence for this interaction was demonstrated by fluorescence-based membrane potential measurements. We conclude that the synergistic antimicrobial activity of the combination NCL195 + colistin against GNB pathogens warrants further exploration for specific treatment of acute GNB infections.
Collapse
Affiliation(s)
- Hang Thi Nguyen
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia; Department of Pharmacology, Toxicology, Internal Medicine and Diagnostics, Faculty of Veterinary Medicine, Vietnam National University of Agriculture, Hanoi, Vietnam
| | - Henrietta Venter
- Health and Biomedical Innovation, Clinical and Health Sciences, University of South Australia, Adelaide, SA, Australia
| | - Tania Veltman
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia
| | - Ruth Williams
- Adelaide Microscopy, University of Adelaide, Adelaide, SA, Australia
| | - Lisa Anne O'Donovan
- ARC Centre of Excellence in Plant Energy Biology, School of Agriculture, Food & Wine, University of Adelaide, SA, Australia
| | - Cecilia C Russell
- Chemistry, School of Environmental & Life Sciences, University of Newcastle, Callaghan, NSW, Australia
| | - Adam McCluskey
- Chemistry, School of Environmental & Life Sciences, University of Newcastle, Callaghan, NSW, Australia
| | | | - Abiodun David Ogunniyi
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia.
| | - Darren J Trott
- Australian Centre for Antimicrobial Resistance Ecology, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia.
| |
Collapse
|
23
|
Khan FM, Gondil VS, Li C, Jiang M, Li J, Yu J, Wei H, Yang H. A Novel Acinetobacter baumannii Bacteriophage Endolysin LysAB54 With High Antibacterial Activity Against Multiple Gram-Negative Microbes. Front Cell Infect Microbiol 2021; 11:637313. [PMID: 33738267 PMCID: PMC7960757 DOI: 10.3389/fcimb.2021.637313] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/21/2021] [Indexed: 12/14/2022] Open
Abstract
The rapid spread and emergence of multidrug-resistant Acinetobacter baumannii and other pathogenic Gram-negative bacteria spurred scientists and clinicians to look for alternative therapeutic agents to conventional antibiotics. In the present study, an A. baumannii bacteriophage p54 was isolated and characterized. Morphological and genome analysis revealed that bacteriophage p54 belongs to Myoviridae family with a genome size of 165,813 bps. A novel endolysin, namely LysAB54, showing low similarity with other well-known related endolysins, was cloned, expressed, and characterized from the bacteriophage p54. LysAB54 showed significant bactericidal activity against multidrug-resistant A. baumannii and other Gram-negative bacteria, including Pseudomonas aeruginosa, Klebsiella pneumoniae, and Escherichia coli, in the absence of outer membrane permeabilizers. Based on all those observations, LysAB54 could represent a potential agent for the treatment of multidrug-resistant Gram-negative superbugs.
Collapse
Affiliation(s)
- Fazal Mehmood Khan
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,International College, University of Chinese Academy of Sciences, Beijing, China
| | - Vijay Singh Gondil
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Changchang Li
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,International College, University of Chinese Academy of Sciences, Beijing, China
| | - Mengwei Jiang
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Junhua Li
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China
| | - Junping Yu
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,International College, University of Chinese Academy of Sciences, Beijing, China
| | - Hongping Wei
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,International College, University of Chinese Academy of Sciences, Beijing, China
| | - Hang Yang
- CAS Key Laboratory of Special Pathogens and Biosafety, Center for Biosafety Mega-Science, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, China.,International College, University of Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
24
|
Li J, Li Z, Liu X, Li C, Zheng Y, Yeung KWK, Cui Z, Liang Y, Zhu S, Hu W, Qi Y, Zhang T, Wang X, Wu S. Interfacial engineering of Bi 2S 3/Ti 3C 2T x MXene based on work function for rapid photo-excited bacteria-killing. Nat Commun 2021; 12:1224. [PMID: 33619276 PMCID: PMC7900204 DOI: 10.1038/s41467-021-21435-6] [Citation(s) in RCA: 149] [Impact Index Per Article: 49.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 01/15/2021] [Indexed: 12/24/2022] Open
Abstract
In view of increasing drug resistance, ecofriendly photoelectrical materials are promising alternatives to antibiotics. Here we design an interfacial Schottky junction of Bi2S3/Ti3C2Tx resulting from the contact potential difference between Ti3C2Tx and Bi2S3. The different work functions induce the formation of a local electrophilic/nucleophilic region. The self-driven charge transfer across the interface increases the local electron density on Ti3C2Tx. The formed Schottky barrier inhibits the backflow of electrons and boosts the charge transfer and separation. The photocatalytic activity of Bi2S3/Ti3C2Tx intensively improved the amount of reactive oxygen species under 808 nm near-infrared radiation. They kill 99.86% of Staphylococcus aureus and 99.92% of Escherichia coli with the assistance of hyperthermia within 10 min. We propose the theory of interfacial engineering based on work function and accordingly design the ecofriendly photoresponsive Schottky junction using two kinds of components with different work functions to effectively eradicate bacterial infection.
Collapse
Affiliation(s)
- Jianfang Li
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin, China
| | - Zhaoyang Li
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin, China
| | - Xiangmei Liu
- Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan, China.
| | - Changyi Li
- Stomatological Hospital, Tianjin Medical University, Tianjin, China
| | - Yufeng Zheng
- College of Engineering, State Key Laboratory for Turbulence and Complex System, Department of Materials Science and Engineering, Peking University, Beijing, China
| | - Kelvin Wai Kwok Yeung
- Department of Orthopaedics & Traumatology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Zhenduo Cui
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin, China
| | - Yanqin Liang
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin, China
| | - Shengli Zhu
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin, China
| | - Wenbin Hu
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin, China
| | - Yajun Qi
- Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan, China
| | - Tianjin Zhang
- Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan, China
| | - Xianbao Wang
- Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan, China
| | - Shuilin Wu
- School of Materials Science & Engineering, The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin, China.
| |
Collapse
|
25
|
2-Methoxy-5-(6-methoxypyridin-3-yl-imino-methyl)phenol and its transition metal complexes as potent antibacterial agents: Synthesis, characterization, theoretical investigations and biological evaluation. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
26
|
Gupta S, Kumar M, Shergill SPS, Tandel K. Evaluation of ceftriaxone-sulbactam-disodium edetate adjuvant combination against multi-drug resistant Gram-negative organisms. Afr J Lab Med 2020; 9:991. [PMID: 33354525 PMCID: PMC7736688 DOI: 10.4102/ajlm.v9i1.991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 08/27/2020] [Indexed: 11/23/2022] Open
Abstract
Background Multi-drug resistant (MDR) Gram-negative bacteria are an emerging threat, both in hospital and community settings. As very few antibiotics are effective against such infections, the need of the hour is a new antibiotic or drug combination which can overcome the effect of extended-spectrum β-lactamases (ESBL) and metallo β-lactamases (MBL). A new antibiotic combination of ceftriaxone, sulbactam and disodium edetate (CSE) has recently been proposed to tackle the MDR organisms. Objective Our study was carried out to assess the susceptibility of ESBL- and MBL-producing Gram-negative organisms to CSE. Methods The study was conducted in a tertiary-care hospital in Delhi, India, from February 2017 to June 2017. A total of 179 MDR (85 ESBL + 94 MBL) Gram-negative isolates from various clinical samples, identified by an automated system (Vitek 2) were tested against CSE using the Kirby-Bauer disc diffusion method. Susceptibility to CSE was recorded based on interpretative zone sizes of ceftriaxone as per 2017 Clinical and Laboratory Standards Institute guidelines. Results The most common isolate was Escherichia coli (76/179; 42.4%) followed by Klebsiella pneumoniae (53/179; 29.6%) and Acinetobacter baumanii (27/179; 15.1%). The in vitro susceptibility of ESBL- and MBL-producing Gram-negative isolates to CSE was found to be 58/85 (68.2%) for ESBL and 37/94 (39.4%) for MBL. Conclusion The in vitro susceptibility results obtained for CSE against ESBL-producing organisms is promising. It has the potential to emerge as a carbapenem-sparing antibiotic, active against ESBL-producing strains. Further clinical studies are required to establish the clinical efficacy of CSE against MDR pathogens.
Collapse
Affiliation(s)
- Shilpi Gupta
- Department of Microbiology, Military Hospital, Bhopal, India
| | - Mahadevan Kumar
- Department of Microbiology, Bharati Vidyapeeth University Medical College, Pune, India
| | | | - Kundan Tandel
- Department of Microbiology, Command Hospital (Central Command), Lucknow, India
| |
Collapse
|
27
|
Atukuri D, S V, R S, L V, R P, M M R. Identification of quinoline-chalcones and heterocyclic chalcone-appended quinolines as broad-spectrum pharmacological agents. Bioorg Chem 2020; 105:104419. [PMID: 33142228 DOI: 10.1016/j.bioorg.2020.104419] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/19/2020] [Accepted: 10/20/2020] [Indexed: 10/23/2022]
Abstract
Quinoline derivatives have been reported to possess enticing pharmacological properties. In particular, quinoline-chalcones are identified as promising scaffolds for drug discovery. For a long, the quinoline analogs have been in clinical use for various medical conditions such as cancer inhibitory activity, antibacterial and antifungal, anti-plasmodial, DNA damage inhibitory activity, etc. The number of causalities recorded because of the above-mentioned clinical states is significantly large. Though drug design and discovery is a continuous process all over the world, issues like drug-resistance, low metabolic stability, and long-range side effects are potential hindrances for the continuous use of present pharmacological drugs. In this review work, we focused on the recent drug discovery based on quinoline-chalcones. The work emphasizes the potency of a wide range of quinoline chalcone analogs towards the inhibition of infections caused by the various pathogenic microbes such as bacteria, fungi, plasmodium. Alongside, the quinoline chalcones possessing DNA cleavage properties and cancer cell growth inhibitory properties are also discussed. More importantly, the strongest pharmacological molecules are identified based on the inhibitory properties, cytotoxic values, and pharmacokinetics of synthesized derivatives. Additionally, a structure-activity relationship is established amongst the evaluated molecules. Supplemented by the mechanism of action in few pharmacological activities, the potent activity is also proved by the favorable binding interactions in molecular simulation studies.
Collapse
Affiliation(s)
- Dorababu Atukuri
- Department of Chemistry, SRMPP Govt. First Grade College, Huvinahadagali 583219, India.
| | - Vijayalaxmi S
- Department of Chemistry, SRMPP Govt. First Grade College, Huvinahadagali 583219, India
| | - Sanjeevamurthy R
- Department of Chemistry, SRMPP Govt. First Grade College, Huvinahadagali 583219, India
| | - Vidya L
- Department of Chemistry, SRMPP Govt. First Grade College, Huvinahadagali 583219, India
| | - Prasannakumar R
- Department of Chemistry, SRMPP Govt. First Grade College, Huvinahadagali 583219, India
| | - Raghavendra M M
- Department of Chemistry, SRMPP Govt. First Grade College, Huvinahadagali 583219, India
| |
Collapse
|
28
|
Khatkar P, Ahlawat A, Asija S, Singh V. Synthesis, characterization, in vitro antimicrobial, DNA binding activity and QSAR studies of diorganotin(IV) complexes of Schiff bases derived from 2-benzoyl-1 H-indene-1,3(2 H)-dione and 4-substituted benzoic acid hydrazides. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2020.1821026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Priyanka Khatkar
- Department of Chemistry, Guru Jambheshwar University of Science & Technology, Hisar, India
| | - Aarti Ahlawat
- Department of Chemistry, Guru Jambheshwar University of Science & Technology, Hisar, India
| | - Sonika Asija
- Department of Chemistry, Guru Jambheshwar University of Science & Technology, Hisar, India
| | - Vikramjeet Singh
- Department of Pharmaceutical Sciences, Guru Jambheshwar University of Science & Technology, Hisar, India
| |
Collapse
|
29
|
Soleymanzadeh Moghadam S, Mohammad N, Ghooshchian M, FathiZadeh S, Khodaii Z, Faramarzi M, Fagheei Aghmiyuni Z, Roudbari M, Pazouki A, Mousavi Shabestari T. Comparison of the effects of Lactobacillus plantarum versus imipenem on infected burn wound healing. Med J Islam Repub Iran 2020; 34:94. [PMID: 33315993 PMCID: PMC7722975 DOI: 10.34171/mjiri.34.94] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Indexed: 12/13/2022] Open
Abstract
Background: Infection of burn wounds is one of the most important problems in the world. Lactobacillus plantarum is known for burn wound healing because of the immunomodulatory and anti-microbial roles. This study was performed to compare the effects of L. plantarum and imipenem - alone and in combination - on infected burn wound healing. Methods: Burn wounds were experimentally induced on 50 rats in three test groups (germ and supernatant of L. plantarum ) and two control groups (n=10 each) and were inoculated with Pseudomonas aeruginosa. During a 14-day period, wounds in all groups were daily treated topically. The data were analyzed using one-way analysis of variance followed by Tukey-Kramer and LSD. A p-value of < 0.05 was considered as statistically significant. Results: The mean size of the wound on day 14 after the treatment in the probiotic group was significantly lower than the control and the supernatant treated groups (p<0.05). The percentage of wound healing was significantly higher in the probiotic pellet treated group compared to the imipenem and the supernatant groups (by Anova test: 69.58%, p=0.022). The mean leukocyte count in the probiotic pellet group (12110) and supernatant group (13650) was significantly higher than the imipenem group (7670) (p=0.002 and 0.001, respectively). Wound cultures revealed that the percentage of cases where the pathogens had no growth was significantly different among the comparison groups. In all three test groups, P. aeruginosa was completely eliminated in comparison to the positive control group (p<0.05). Conclusion: The results of our study showed that L. plantarum and its by-products promote wound healing and can be used as an alternative to antibiotics to treat ulcer infections caused by resistant bacteria.
Collapse
Affiliation(s)
- Somayeh Soleymanzadeh Moghadam
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Nazanin Mohammad
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Maryam Ghooshchian
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Sara FathiZadeh
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Zohreh Khodaii
- Dietary Supplements and Probiotic Research Center, Alborz University of Medical Science, Karaj, Iran
| | - Mahmood Faramarzi
- Research Center of Pediatric Infectious Diseases, Institute of immunology and infectious diseases, Iran University of medical sciences, Tehran, Iran
| | - Zeinab Fagheei Aghmiyuni
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Masoud Roudbari
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
- Department of Biostatistics, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Abdolreza Pazouki
- Division of Minimally Invasive Surgery Fellowship Program, Rasoul Akram Hospital, Iran University of Medical Science, Tehran, Iran
| | - Tahereh Mousavi Shabestari
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
30
|
Montis C, Joseph P, Magnani C, Marín-Menéndez A, Barbero F, Estrada AR, Nepravishta R, Angulo J, Checcucci A, Mengoni A, Morris CJ, Berti D. Multifunctional nanoassemblies target bacterial lipopolysaccharides for enhanced antimicrobial DNA delivery. Colloids Surf B Biointerfaces 2020; 195:111266. [PMID: 32739771 DOI: 10.1016/j.colsurfb.2020.111266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/10/2020] [Accepted: 07/19/2020] [Indexed: 10/23/2022]
Abstract
The development of new therapeutic strategies against multidrug resistant Gram-negative bacteria is a major challenge for pharmaceutical research. In this respect, it is increasingly recognized that an efficient treatment for resistant bacterial infections should combine antimicrobial and anti-inflammatory effects. Here, we explore the multifunctional therapeutic potential of nanostructured self-assemblies from a cationic bolaamphiphile, which target bacterial lipopolysaccharides (LPSs) and associates with an anti-bacterial nucleic acid to form nanoplexes with therapeutic efficacy against Gram-negative bacteria. To understand the mechanistic details of these multifunctional antimicrobial-anti-inflammatory properties, we performed a fundamental study, comparing the interaction of these nanostructured therapeutics with synthetic biomimetic bacterial membranes and live bacterial cells. Combining a wide range of experimental techniques (Confocal Microscopy, Fluorescence Correlation Spectroscopy, Microfluidics, NMR, LPS binding assays), we demonstrate that the LPS targeting capacity of the bolaamphiphile self-assemblies, comparable to that exerted by Polymixin B, is a key feature of these nanoplexes and one that permits entry of therapeutic nucleic acids in Gram-negative bacteria. These findings enable a new approach to the design of efficient multifunctional therapeutics with combined antimicrobial and anti-inflammatory effects and have therefore the potential to broadly impact fundamental and applied research on self-assembled nano-sized antibacterials for antibiotic resistant infections.
Collapse
Affiliation(s)
- Costanza Montis
- Department of Chemistry and CSGI, University of Florence, Florence, Italy
| | - Pierre Joseph
- LAAS-CNRS, Université de Toulouse, CNRS, Toulouse, France
| | - Chiara Magnani
- Department of Chemistry and CSGI, University of Florence, Florence, Italy
| | | | | | | | | | - Jesus Angulo
- School of Pharmacy, University of East Anglia, Norwich, UK
| | - Alice Checcucci
- Department of Biology, University of Florence, Florence, Italy
| | - Alessio Mengoni
- Department of Biology, University of Florence, Florence, Italy
| | | | - Debora Berti
- Department of Chemistry and CSGI, University of Florence, Florence, Italy.
| |
Collapse
|
31
|
A novel Triticum durum Annexin 12 protein: Expression, purification and biological activities against Listeria monocytogenes growth in meat under refrigeration. Microb Pathog 2020; 143:104143. [DOI: 10.1016/j.micpath.2020.104143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 03/10/2020] [Accepted: 03/10/2020] [Indexed: 01/08/2023]
|
32
|
Abushaheen MA, Muzaheed, Fatani AJ, Alosaimi M, Mansy W, George M, Acharya S, Rathod S, Divakar DD, Jhugroo C, Vellappally S, Khan AA, Shaik J, Jhugroo P. Antimicrobial resistance, mechanisms and its clinical significance. Dis Mon 2020; 66:100971. [PMID: 32201008 DOI: 10.1016/j.disamonth.2020.100971] [Citation(s) in RCA: 157] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Antimicrobial agents play a key role in controlling and curing infectious disease. Soon after the discovery of the first antibiotic, the challenge of antibiotic resistance commenced. Antimicrobial agents use different mechanisms against bacteria to prevent their pathogenesis and they can be classified as bactericidal or bacteriostatic. Antibiotics are one of the antimicrobial agents which has several classes, each with different targets. Consequently, bacteria are endlessly using methods to overcome the effectivity of the antibiotics by using distinct types of mechanisms. Comprehending the mechanisms of resistance is vital for better understanding and to continue use of current antibiotics. Which also helps to formulate synthetic antimicrobials to overcome the current mechanism of resistance. Also, encourage in prudent use and misuse of antimicrobial agents. Thus, decline in treatment costs and in the rate of morbidity and mortality. This review will be concentrating on the mechanism of actions of several antibiotics and how bacteria develop resistance to them, as well as the method of acquiring the resistance in several bacteria and how can a strain be resistant to several types of antibiotics. This review also analyzes the prevalence, major clinical implications, clinical causes of antibiotic resistance. Further, it evaluates the global burden of antimicrobial resistance, identifies various challenges and strategies in addressing the issue. Finally, put forward certain recommendations to prevent the spread and reduce the rate of resistance growth.
Collapse
Affiliation(s)
- Manar Ali Abushaheen
- Department of Clinical Laboratory Science, College of Applied Medical Sciences, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Muzaheed
- Department of Clinical Laboratory Science, College of Applied Medical Sciences, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.
| | - Amal Jamil Fatani
- Department of Pharmacology & Toxicology, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mohammed Alosaimi
- Consultant, Department of Restorative Dentistry, College of Dentistry, King Saud bin Abdul Aziz University for Health Sciences, P.O Box: 22490, Riyadh 11426, Saudi Arabia
| | - Wael Mansy
- Clinical Pharmacy Department, College of Pharmacy, King Saud University, Saudi Arabia; Pharmacology Department, Faculty of Medicine, Cairo University, Egypt
| | - Merin George
- General Dentist and Public Health Researcher, Australia
| | - Sadananda Acharya
- Department of Public Health, College of Public Health, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Sanjay Rathod
- Department of Post Graduate Studies and Research in Microbiology, Gulbarga University, Gulbarga- 585106, India
| | - Darshan Devang Divakar
- Dental Biomaterials Research Chair, Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia
| | - Chitra Jhugroo
- Dental Biomaterials Research Chair, Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia
| | - Sajith Vellappally
- Dental Biomaterials Research Chair, Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia
| | - Aftab Ahmed Khan
- Dental Biomaterials Research Chair, Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia
| | - Jilani Shaik
- Genome Research Chair, Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Poojdev Jhugroo
- CAP Research Ltd., 2nd Floor Orbis Court, 132 St Jean Road 72218 Quatre Bornes, Mauritius
| |
Collapse
|
33
|
Magalhães AP, Jorge P, Pereira MO. Pseudomonas aeruginosa and Staphylococcus aureus communication in biofilm infections: insights through network and database construction. Crit Rev Microbiol 2019; 45:712-728. [DOI: 10.1080/1040841x.2019.1700209] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Andreia Patrícia Magalhães
- CEB - Centre of Biological Engineering, LIBRO - Laboratory of Research in Biofilms Rosário Oliveira, University of Minho, Braga, Portugal
| | - Paula Jorge
- CEB - Centre of Biological Engineering, LIBRO - Laboratory of Research in Biofilms Rosário Oliveira, University of Minho, Braga, Portugal
| | - Maria Olívia Pereira
- CEB - Centre of Biological Engineering, LIBRO - Laboratory of Research in Biofilms Rosário Oliveira, University of Minho, Braga, Portugal
| |
Collapse
|
34
|
Antimicrobial Resistance Prediction for Gram-Negative Bacteria via Game Theory-Based Feature Evaluation. Sci Rep 2019; 9:14487. [PMID: 31597945 PMCID: PMC6785542 DOI: 10.1038/s41598-019-50686-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 09/13/2019] [Indexed: 12/16/2022] Open
Abstract
The increasing prevalence of antimicrobial-resistant bacteria drives the need for advanced methods to identify antimicrobial-resistance (AMR) genes in bacterial pathogens. With the availability of whole genome sequences, best-hit methods can be used to identify AMR genes by differentiating unknown sequences with known AMR sequences in existing online repositories. Nevertheless, these methods may not perform well when identifying resistance genes with sequences having low sequence identity with known sequences. We present a machine learning approach that uses protein sequences, with sequence identity ranging between 10% and 90%, as an alternative to conventional DNA sequence alignment-based approaches to identify putative AMR genes in Gram-negative bacteria. By using game theory to choose which protein characteristics to use in our machine learning model, we can predict AMR protein sequences for Gram-negative bacteria with an accuracy ranging from 93% to 99%. In order to obtain similar classification results, identity thresholds as low as 53% were required when using BLASTp.
Collapse
|
35
|
Hawiger J, Zienkiewicz J. Decoding inflammation, its causes, genomic responses, and emerging countermeasures. Scand J Immunol 2019; 90:e12812. [PMID: 31378956 PMCID: PMC6883124 DOI: 10.1111/sji.12812] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 07/03/2019] [Accepted: 07/29/2019] [Indexed: 12/11/2022]
Abstract
Inflammation is the mechanism of diseases caused by microbial, autoimmune, allergic, metabolic and physical insults that produce distinct types of inflammatory responses. This aetiologic view of inflammation informs its classification based on a cause‐dependent mechanism as well as a cause‐directed therapy and prevention. The genomic era ushered in a new understanding of inflammation by highlighting the cell's nucleus as the centre of the inflammatory response. Exogenous or endogenous inflammatory insults evoke genomic responses in immune and non‐immune cells. These genomic responses depend on transcription factors, which switch on and off a myriad of inflammatory genes through their regulatory networks. We discuss the transcriptional paradigm of inflammation based on denying transcription factors’ access to the nucleus. We present two approaches that control proinflammatory signalling to the nucleus. The first approach constitutes a novel intracellular protein therapy with bioengineered physiologic suppressors of cytokine signalling. The second approach entails control of proinflammatory transcriptional cascades by targeting nuclear transport with a cell‐penetrating peptide that inhibits the expression of 23 out of the 26 mediators of inflammation along with the nine genes required for metabolic responses. We compare these emerging anti‐inflammatory countermeasures to current therapies. The transcriptional paradigm of inflammation offers nucleocentric strategies for microbial, autoimmune, metabolic, physical and other types of inflammation afflicting millions of people worldwide.
Collapse
Affiliation(s)
- Jacek Hawiger
- Immunotherapy Program at Vanderbilt University School of Medicine, Nashville, TN, USA.,Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA.,Department of Veterans Affairs, Tennessee Valley Health Care System, Nashville, TN, USA.,Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Jozef Zienkiewicz
- Immunotherapy Program at Vanderbilt University School of Medicine, Nashville, TN, USA.,Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA.,Department of Veterans Affairs, Tennessee Valley Health Care System, Nashville, TN, USA
| |
Collapse
|
36
|
Abstract
The emergence of antimicrobial drug resistance requires development of alternative therapeutic options. Multidrug-resistant strains of Enterococcus spp., Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumanii, Pseudomonas aeruginosa and Enterobacter spp. are still the most commonly identified antimicrobial-resistant pathogens. These microorganisms are part of the so-called 'ESKAPE' pathogens to emphasize that they currently cause the majority of hospital acquired infections and effectively 'escape' the effects of antibacterial drugs. Thus, alternative, safer and more efficient antimicrobial strategies are urgently needed, especially against 'ESKAPE' superbugs. Antimicrobial photodynamic inactivation is a therapeutic option used in the treatment of infectious diseases. It is based on a combination of a photosensitizer, light and oxygen to remove highly metabolically active cells.
Collapse
|
37
|
Approaches to the Structure-Based Design of Antivirulence Drugs: Therapeutics for the Post-Antibiotic Era. Molecules 2019; 24:molecules24030378. [PMID: 30678155 PMCID: PMC6384752 DOI: 10.3390/molecules24030378] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 01/14/2019] [Accepted: 01/18/2019] [Indexed: 01/02/2023] Open
Abstract
The alarming rise of multidrug-resistant bacterial strains, coupled with decades of stagnation in the field of antibiotic development, necessitates exploration of new therapeutic approaches to treat bacterial infections. Targeting bacterial virulence is an attractive alternative to traditional antibiotics in that this approach disarms pathogens that cause human diseases, without placing immediate selective pressure on the target bacterium or harming commensal species. The growing number of validated virulence protein targets for which structural information has been obtained, along with advances in computational power and screening algorithms, make the rational design of antivirulence drugs a promising avenue to explore. Here, we review the principles of structure-based drug design and the exciting opportunities this technique presents for antivirulence drug discovery.
Collapse
|
38
|
Khan S, P MR, Rizvi A, Alam MM, Rizvi M, Naseem I. ROS mediated antibacterial activity of photoilluminated riboflavin: A photodynamic mechanism against nosocomial infections. Toxicol Rep 2019; 6:136-142. [PMID: 30671349 PMCID: PMC6330557 DOI: 10.1016/j.toxrep.2019.01.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 01/04/2019] [Accepted: 01/08/2019] [Indexed: 11/16/2022] Open
Abstract
Riboflavin undergoes intersystem conversion under photoillumination. Interacts with molecular oxygen and generates ROS. Generated ROS disrupts E. coli cell membranes. Ultimately killing E. coli. Mechanism can be used to kill E. coli on hospital ware causing nosocomial infections.
Nosocomial infections are a major threat to modern therapeutics. The major causative agent of these infections is multidrug-resistant gram-negative bacteria, which impart high morbidity and mortality rate. This has led to an urge for the development of new antibiotics. Antimicrobial photodynamic therapy is a promising strategy to which till date no resistant strain has been reported. Since the efficacy of photodynamic therapy largely depends on the selection and administration of an appropriate photosensitizer, therefore, the realization of clinically active photosensitizers is an immediate need. Here, by using E. coli as a study model we have demonstrated the antimicrobial photodynamic potential of riboflavin. Intracellular ROS formation by DCFH-DA assay, lipid peroxidation, protein carbonylation, LDH activity was measured in treated bacterial samples. Enzymatic (SOD, CAT, GSH) antioxidants and non-enzymatic (GSH) was further evaluated. Bacterial death was confirmed by colony forming assay, optical microscopy and scanning electron microscopy. The treated bacterial cells exhibited abundant ROS generation and marked increment in the level of oxidative stress markers as well as significant reduction in LDH activity. Marked reduction in colony forming units was also observed. Optical microscopic and SEM images further confirmed the bacterial death. Thus, we can say that photoilluminated riboflavin renders the redox status of bacterial cells into a compromised state leading to significant membrane damage ultimately causing bacterial death. This study aims to add one more therapeutic dimension to photoilluminated riboflavin as it can be effectively employed in targeting bacterial biofilms occurring on hospital wares causing several serious medical conditions.
Collapse
Affiliation(s)
- Saniyya Khan
- Department of Biochemistry, Faculty of Life Sciences, The Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Mohammed Rayis P
- Department of Biochemistry, Faculty of Life Sciences, The Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Asim Rizvi
- Department of Biochemistry, Faculty of Life Sciences, The Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Md Maroof Alam
- Department of Biochemistry, Faculty of Life Sciences, The Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Meher Rizvi
- Department of Microbiology, Jawaharlal Nehru Medical College, The Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Imrana Naseem
- Department of Biochemistry, Faculty of Life Sciences, The Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| |
Collapse
|
39
|
Affiliation(s)
- Ariel L. Furst
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Matthew B. Francis
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| |
Collapse
|
40
|
Synthesis, characterization, in vitro antimicrobial and QSAR studies of diorganotin(IV) complexes of Schiff bases derived from 2-(3-methylbutanoyl)-1H-indene-1,3(2H)-dione and 4-substituted anilines. MONATSHEFTE FUR CHEMIE 2018. [DOI: 10.1007/s00706-018-2308-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
41
|
Arthropod venoms: Biochemistry, ecology and evolution. Toxicon 2018; 158:84-103. [PMID: 30529476 DOI: 10.1016/j.toxicon.2018.11.433] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 11/20/2018] [Accepted: 11/26/2018] [Indexed: 12/17/2022]
Abstract
Comprising of over a million described species of highly diverse invertebrates, Arthropoda is amongst the most successful animal lineages to have colonized aerial, terrestrial, and aquatic domains. Venom, one of the many fascinating traits to have evolved in various members of this phylum, has underpinned their adaptation to diverse habitats. Over millions of years of evolution, arthropods have evolved ingenious ways of delivering venom in their targets for self-defence and predation. The morphological diversity of venom delivery apparatus in arthropods is astounding, and includes extensively modified pedipalps, tail (telson), mouth parts (hypostome), fangs, appendages (maxillulae), proboscis, ovipositor (stinger), and hair (urticating bristles). Recent investigations have also unravelled an astonishing venom biocomplexity with molecular scaffolds being recruited from a multitude of protein families. Venoms are a remarkable bioresource for discovering lead compounds in targeted therapeutics. Several components with prospective applications in the development of advanced lifesaving drugs and environment friendly bio-insecticides have been discovered from arthropod venoms. Despite these fascinating features, the composition, bioactivity, and molecular evolution of venom in several arthropod lineages remains largely understudied. This review highlights the prevalence of venom, its mode of toxic action, and the evolutionary dynamics of venom in Arthropoda, the most speciose phylum in the animal kingdom.
Collapse
|
42
|
Kamaruzzaman NF, Tan LP, Mat Yazid KA, Saeed SI, Hamdan RH, Choong SS, Wong WK, Chivu A, Gibson AJ. Targeting the Bacterial Protective Armour; Challenges and Novel Strategies in the Treatment of Microbial Biofilm. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1705. [PMID: 30217006 PMCID: PMC6164881 DOI: 10.3390/ma11091705] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/07/2018] [Accepted: 09/09/2018] [Indexed: 02/07/2023]
Abstract
Infectious disease caused by pathogenic bacteria continues to be the primary challenge to humanity. Antimicrobial resistance and microbial biofilm formation in part, lead to treatment failures. The formation of biofilms by nosocomial pathogens such as Staphylococcus aureus (S. aureus), Pseudomonas aeruginosa (P. aeruginosa), and Klebsiella pneumoniae (K. pneumoniae) on medical devices and on the surfaces of infected sites bring additional hurdles to existing therapies. In this review, we discuss the challenges encountered by conventional treatment strategies in the clinic. We also provide updates on current on-going research related to the development of novel anti-biofilm technologies. We intend for this review to provide understanding to readers on the current problem in health-care settings and propose new ideas for new intervention strategies to reduce the burden related to microbial infections.
Collapse
Affiliation(s)
- Nor Fadhilah Kamaruzzaman
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa 16100, Kelantan, Malaysia.
| | - Li Peng Tan
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa 16100, Kelantan, Malaysia.
| | - Khairun Anisa Mat Yazid
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa 16100, Kelantan, Malaysia.
| | - Shamsaldeen Ibrahim Saeed
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa 16100, Kelantan, Malaysia.
| | - Ruhil Hayati Hamdan
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa 16100, Kelantan, Malaysia.
| | - Siew Shean Choong
- Faculty of Veterinary Medicine, Universiti Malaysia Kelantan, Pengkalan Chepa 16100, Kelantan, Malaysia.
| | - Weng Kin Wong
- School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia.
| | - Alexandru Chivu
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London NW3 2PF, UK.
| | - Amanda Jane Gibson
- Royal Veterinary College, Pathobiology and Population Sciences, Hawkshead Lane, North Mymms, Hatfield AL9 7TA, UK.
| |
Collapse
|
43
|
Chavan AS, Kharat AS, Bhosle MR, Mane RA. Baker’s yeast catalyzed one-pot synthesis of bioactive 2-[benzylidene(or pyrazol-4-ylmethylene)hydrazono]-1,3-thiazolidin-4-one-5-yl-acetic acids. HETEROCYCL COMMUN 2018. [DOI: 10.1515/hc-2017-0130] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
An efficient and simple one-pot protocol has been developed for synthesis of substituted derivatives of 2-hydrazono-4-thiazolidinone-5-acetic acids 4a–j and 6a–g by cyclocondensation of aryl/pyrazolyl aldehyde, thiosemicarbazide and maleic anhydride in acetonitrile in the presence of readily available whole cell biocatalyst, baker’s yeast (Saccharomyces cerevisiae). The reaction is enhanced by ultrasonication.
Collapse
|
44
|
Bowker KE, Noel AR, Tomaselli S, Attwood M, MacGowan AP. Pharmacodynamics of inhaled amikacin (BAY 41-6551) studied in an in vitro pharmacokinetic model of infection. J Antimicrob Chemother 2018; 73:1305-1313. [DOI: 10.1093/jac/dky002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 12/27/2017] [Indexed: 01/26/2023] Open
Affiliation(s)
- Karen E Bowker
- Bristol Centre for Antimicrobial Research & Evaluation (BCARE), Severn Infection Sciences Partnership, Southmead Hospital, Bristol BS10 5NB, UK
| | - Alan R Noel
- Bristol Centre for Antimicrobial Research & Evaluation (BCARE), Severn Infection Sciences Partnership, Southmead Hospital, Bristol BS10 5NB, UK
| | - Sharon Tomaselli
- Bristol Centre for Antimicrobial Research & Evaluation (BCARE), Severn Infection Sciences Partnership, Southmead Hospital, Bristol BS10 5NB, UK
| | - Marie Attwood
- Bristol Centre for Antimicrobial Research & Evaluation (BCARE), Severn Infection Sciences Partnership, Southmead Hospital, Bristol BS10 5NB, UK
| | - Alasdair P MacGowan
- Bristol Centre for Antimicrobial Research & Evaluation (BCARE), Severn Infection Sciences Partnership, Southmead Hospital, Bristol BS10 5NB, UK
| |
Collapse
|
45
|
Patil RH, Kalam Khan FA, Jadhav K, Damale M, Akber Ansari S, Alkahtani HM, Ali Khan A, Shinde SD, Patil R, Sangshetti JN. Fungal biofilm inhibition by piperazine-sulphonamide linked Schiff bases: Design, synthesis, and biological evaluation. Arch Pharm (Weinheim) 2018. [DOI: 10.1002/ardp.201700354] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Rajendra H. Patil
- Department of Biotechnology; Savitribai Phule Pune University; Pune India
| | - Firoz A. Kalam Khan
- Department of Pharmaceutical Chemistry; Oriental College of Pharmacy; Navi Mumbai India
| | - Kaivalya Jadhav
- Y. B. Chavan College of Pharmacy; Dr. Rafiq Zakaria Campus; Aurangabad India
| | - Manoj Damale
- Shreeyash Institute of Pharmaceutical Education and Research; Aurangabad India
| | - Siddique Akber Ansari
- Department of Pharmaceutical Chemistry; College of Pharmacy, King Saud University; Riyadh Saudi Arabia
| | - Hamad M. Alkahtani
- Department of Pharmaceutical Chemistry; College of Pharmacy, King Saud University; Riyadh Saudi Arabia
| | - Azmat Ali Khan
- Department of Pharmaceutical Chemistry; College of Pharmacy, King Saud University; Riyadh Saudi Arabia
| | | | - Rajesh Patil
- Sinhgad Technical Education Society's; Smt. Kashibai Navale College of Pharmacy, Kondhwa (Bk); Pune India
| | | |
Collapse
|
46
|
Design, synthesis and biological evaluation of quinazolin-4(3 H )-one Schiff base conjugates as potential antiamoebic agents. JOURNAL OF SAUDI CHEMICAL SOCIETY 2018. [DOI: 10.1016/j.jscs.2016.05.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
47
|
Incentivising innovation in antibiotic drug discovery and development: progress, challenges and next steps. J Antibiot (Tokyo) 2017; 70:1087-1096. [PMID: 29089600 PMCID: PMC5746591 DOI: 10.1038/ja.2017.124] [Citation(s) in RCA: 139] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 09/04/2017] [Accepted: 09/09/2017] [Indexed: 12/30/2022]
Abstract
Political momentum and funding for combatting antimicrobial resistance (AMR) continues to build. Numerous major international and national initiatives aimed at financially incentivising the research and development (R&D) of antibiotics have been implemented. However, it remains unclear how to effectively strengthen the current set of incentive programmes to further accelerate antibiotic innovation. Based on a literature review and expert input, this study first identifies and assesses the major international, European Union, US and UK antibiotic R&D funding programmes. These programmes are then evaluated across market and public health criteria necessary for comprehensively improving the antibiotic market. The current set of incentive programmes are an important initial step to improving the economic feasibility of antibiotic development. However, there appears to be a lack of global coordination across all initiatives, which risks duplicating efforts, leaving funding gaps in the value chain and overlooking important AMR goals. This study finds that incentive programmes are overly committed to early-stage push funding of basic science and preclinical research, while there is limited late-stage push funding of clinical development. Moreover, there are almost no pull incentives to facilitate transition of antibiotic products from early clinical phases to commercialisation, focus developer concentration on the highest priority antibiotics and attract large pharmaceutical companies to invest in the market. Finally, it seems that antibiotic sustainability and patient access requirements are poorly integrated into the array of incentive mechanisms.
Collapse
|
48
|
Fankam AG, Kuiate JR, Kuete V. Antibacterial and antibiotic resistance modulatory activities of leaves and bark extracts of Recinodindron heudelotii (Euphorbiaceae) against multidrug-resistant Gram-negative bacteria. Altern Ther Health Med 2017; 17:168. [PMID: 28340621 PMCID: PMC5366133 DOI: 10.1186/s12906-017-1687-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 03/15/2017] [Indexed: 11/17/2022]
Abstract
Background Recinodindron heudelotii (Euphorbiaceae) is a plant used in Africa, particularly in Cameroon to treat various ailments including bacterial infections. In this study, we evaluated the extracts of the leaves (RHL) and bark (RHB) of R. heudelotii for their antibacterial and antibiotic resistance modulating activities against 29 Gram-negative bacteria, including multidrug-resistant (MDR) phenotypes. Methods The broth micro-dilution assay was used to evaluate the antibacterial activity, and the antibiotic resistance modulating effects of the plant extracts. Results RHL displayed the most important spectrum of activity with minimal inhibitory concentrations (MICs) values ranging from 256 to 1024 μg/mL against 75.86% of the 29 tested bacteria strains while RHB was not active. RHL also showed killing effects with minimal bactericidal concentrations (MBCs) ranging from 256 to 1024 μg/mL. The activities of tetracycline and kanamycin associated with RHL were improved on 88.89% and 77.78% of the tested MDR bacteria, at MIC/2 at MIC/4 respectively, with 2 to 16-folds decreasing of MIC. This suggests the antibiotic resistance modulating effects of these antibiotics. Conclusion The present study provides data indicating a possible use of the leaves extract of Recinodindron heudelotii alone or in association with common antibiotics in the fight against bacterial infections including those involving MDR bacteria.
Collapse
|
49
|
Targeting bacterial adherence inhibits multidrug-resistant Pseudomonas aeruginosa infection following burn injury. Sci Rep 2016; 6:39341. [PMID: 27996032 PMCID: PMC5171828 DOI: 10.1038/srep39341] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 11/18/2016] [Indexed: 12/19/2022] Open
Abstract
Classical antimicrobial drugs target proliferation and therefore place microbes under extreme selective pressure to evolve resistance. Alternative drugs that target bacterial virulence without impacting survival directly offer an attractive solution to this problem, but to date few such molecules have been discovered. We previously discovered a widespread group of bacterial adhesins, termed Multivalent Adhesion Molecules (MAMs) that are essential for initial binding of bacteria to host tissues and virulence. Thus, targeting MAM-based adherence is a promising strategy for displacing pathogens from host tissues and inhibiting infection. Here, we show that topical application of polymeric microbeads functionalized with the adhesin MAM7 to a burn infected with multidrug-resistant Pseudomonas aeruginosa substantially decreased bacterial loads in the wound and prevented the spread of the infection into adjacent tissues. As a consequence, the application of this adhesion inhibitor allowed for vascularization and wound healing, and maintained local and systemic inflammatory responses to the burn. We propose that MAM7-functionalized microbeads can be used as a topical treatment, to reduce bacterial attachment and hence prevent bacterial colonization and infection of wounds. As adhesion is not required for microbial survival, this anti-infective strategy has the potential to treat multidrug-resistant infections and limit the emergence of drug-resistant pathogens.
Collapse
|
50
|
Genome Sequence of Bacteriophage GG32, Which Can Infect both Salmonella enterica Serovar Typhimurium and Escherichia coli O157:H7. GENOME ANNOUNCEMENTS 2016; 4:4/6/e00802-16. [PMID: 27932635 PMCID: PMC5146427 DOI: 10.1128/genomea.00802-16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We report here a new virulent Salmonella enterica serovar Typhimurium (S. Typhimurium) bacteriophage, GG32, which was isolated from the Guem River in the Republic of Korea. The strain can infect both S. Typhimurium and Escherichia coli (E. coli) O157:H7 and may be a good candidate for a bio-control agent.
Collapse
|