Photosensitized reactive chlorine species-mediated therapeutic destruction of drug-resistant bacteria using plasmonic core–shell Ag@AgCl nanocubes as an external nanomedicine

Nanoscale ◽  
2020 ◽  
Vol 12 (24) ◽  
pp. 12970-12984 ◽  
Author(s):  
Suresh Thangudu ◽  
Sagar Sunil Kulkarni ◽  
Raviraj Vankayala ◽  
Chi-Shiun Chiang ◽  
Kuo Chu Hwang
Keyword(s):  
Antibiotic Resistance ◽  
Rapid Growth ◽  
Bacterial Infections ◽  
Resistant Bacteria ◽  
Core Shell ◽  
Drug Resistant ◽  
Bacterial Antibiotic Resistance ◽  
Drug Resistant Bacteria

Due to the rapid growth of drug-resistant bacterial infections, there is an urgent need to develop innovative antimicrobial strategies to conquer the bacterial antibiotic resistance problems.

Re-challenging antibiotic resistance with Daniel Berman

2020 ◽  
Author(s):  
Daniel Berman
Keyword(s):  
Bacterial Infections ◽  
Point Of Care ◽  
Healthcare Setting ◽  
Rapid Diagnostic Tests ◽  
Resistant Bacteria ◽  
Drug Resistant ◽  
Drug Resistant Bacteria ◽  
Global Threat ◽  
The Right ◽  
Point Of Care Tests

How can we prevent the rise of resistance to antibiotics? In this video, Daniel Berman,  Nesta Challenges, discusses the global threat of AMR and how prizes like the Longitude Prize can foster the development of rapid diagnostic tests for bacterial infections, helping to contribute towards reducing the global threat of drug resistant bacteria. Daniel outlines how accelerating the development of rapid point-of-care tests will ensure that bacterial infections are treated with the most appropriate antibiotic, at the right time and in the right healthcare setting.

scholarly journals Novel Seleno- and Thio-Urea Containing Dihydropyrrol-2-One Analogues as Antibacterial Agents

Antibiotics ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 321
Author(s):  
Shekh Sabir ◽  
Tsz Tin Yu ◽  
Rajesh Kuppusamy ◽  
Basmah Almohaywi ◽  
George Iskander ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Antibiotic Resistance ◽  
Quorum Sensing ◽  
Antibacterial Agents ◽  
Inhibitory Concentration ◽  
Resistant Bacteria ◽  
Drug Resistant ◽  
Positive Bacterium ◽  
Quorum Sensing Inhibition ◽  
Drug Resistant Bacteria

The quorum sensing (QS) system in multi-drug-resistant bacteria such as P. aeruginosa is primarily responsible for the development of antibiotic resistance and is considered an attractive target for antimicrobial drug discovery. In this study, we synthesised a series of novel selenourea and thiourea-containing dihydropyrrol-2-one (DHP) analogues as LasR antagonists. The selenium DHP derivatives displayed significantly better quorum-sensing inhibition (QSI) activities than the corresponding sulphur analogues. The most potent analogue 3e efficiently inhibited the las QS system by 81% at 125 µM and 53% at 31 µM. Additionally, all the compounds were screened for their minimum inhibitory concentration (MIC) against the Gram-positive bacterium S. aureus, and interestingly, only the selenium analogues showed antibacterial activity, with 3c and 3e being the most potent with a MIC of 15.6 µM.

Recent advances: peptides and self-assembled peptide-nanosystems for antimicrobial therapy and diagnosis

2020 ◽  
Vol 8 (18) ◽  
pp. 4975-4996
Author(s):  
Pengfei Zou ◽  
Wen-Ting Chen ◽  
Tongyi Sun ◽  
Yuanyuan Gao ◽  
Li-Li Li ◽  
...  
Keyword(s):  
Human Health ◽  
Antimicrobial Therapy ◽  
Bacterial Infections ◽  
The Body ◽  
Resistant Bacteria ◽  
Drug Resistant ◽  
Self Assembling ◽  
Recent Advances ◽  
Drug Resistant Bacteria ◽  
Therapy And Diagnosis

Bacterial infections, especially the refractory treatment of drug-resistant bacteria, are one of the greatest threats to human health. Self-assembling peptide-based strategies can specifically detect the bacteria at the site of infection in the body and kill it.

Antimicrobial peptide HPA3NT3-A2 effectively inhibits biofilm formation in mice infected with drug-resistant bacteria

2019 ◽  
Vol 7 (12) ◽  
pp. 5068-5083 ◽  
Author(s):  
Jong-Kook Lee ◽  
Loredana Mereuta ◽  
Tudor Luchian ◽  
Yoonkyung Park
Keyword(s):  
Antibiotic Resistance ◽  
Antimicrobial Peptide ◽  
Biofilm Formation ◽  
Extracellular Polymeric Substances ◽  
Resistant Bacteria ◽  
Bacterial Biofilms ◽  
Drug Resistant ◽  
Drug Resistant Bacteria ◽  
Serious Infections

Bacterial biofilms formed through secretion of extracellular polymeric substances (EPS) have been implicated in many serious infections and can increase antibiotic resistance by a factor of more than 1000.

scholarly journals A Simple Assay to Screen Antimicrobial Compounds Potentiating the Activity of Current Antibiotics

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Junaid Iqbal ◽  
Ruqaiyyah Siddiqui ◽  
Shahana Urooj Kazmi ◽  
Naveed Ahmed Khan
Keyword(s):  
Aqueous Extract ◽  
Bacterial Infections ◽  
Juglans Regia ◽  
Tree Bark ◽  
Resistant Bacteria ◽  
Multiple Drug ◽  
Drug Resistant ◽  
Antimicrobial Compounds ◽  
Drug Resistant Bacteria ◽  
Multiple Drug Resistant

Antibiotic resistance continues to pose a significant problem in the management of bacterial infections, despite advances in antimicrobial chemotherapy and supportive care. Here, we suggest a simple, inexpensive, and easy-to-perform assay to screen antimicrobial compounds from natural products or synthetic chemical libraries for their potential to work in tandem with the available antibiotics against multiple drug-resistant bacteria. The aqueous extract ofJuglans regiatree bark was tested against representative multiple drug-resistant bacteria in the aforementioned assay to determine whether it potentiates the activity of selected antibiotics. The aqueous extract ofJ. regiabark was added to Mueller-Hinton agar, followed by a lawn of multiple drug-resistant bacteria,Salmonella typhior enteropathogenicE. coli. Next, filter paper discs impregnated with different classes of antibiotics were placed on the agar surface. Bacteria incubated with extract or antibiotics alone were used as controls. The results showed a significant increase (>30%) in the zone of inhibition around the aztreonam, cefuroxime, and ampicillin discs compared with bacteria incubated with the antibiotics/extract alone. In conclusion, our assay is able to detect either synergistic or additive action ofJ. regiaextract against multiple drug-resistant bacteria when tested with a range of antibiotics.

Tea: An anti-bacterial agent against drug resistant bacteria

2021 ◽  
Vol 15 (10) ◽  
pp. 2506-2511
Author(s):  
Nayyab Sultan ◽  
Sabahat Javaid Butt ◽  
Wajeeha Mehak ◽  
Samreen Qureshi ◽  
Syed Hamza Abbas ◽  
...  
Keyword(s):  
Bacterial Infections ◽  
Salmonella Typhi ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Klebsiella Pneumonia ◽  
Drug Resistant ◽  
Antibiotic Resistant ◽  
Bacterial Agent ◽  
Drug Resistant Bacteria ◽  
Scientific World

Antibiotics have played a crucial role in the treatment of bacterial infections. Past few decades are marked with advancement of multidrug resistant (MDR) pathogens, which have endangered antibiotic’s therapeutic efficacy. Scientific world is now struggling with the crisis of MDR pathogens. This supreme matter demands careful attention or otherwise it would jeopardize clinical management of infectious diseases. Implication of alternative approaches can pave a new way in the treatment of these troublesome bacteria. Tea leaves are known to pose antibacterial activity against many pathogenic microorganisms. This review has summarized the antibacterial potential of tea leave’s extracts against resistant bacterial pathogens such as Staphylococcus aureus, Pseudomonas aeruginosa, Helicobacter pylori, Escherichia coli, Klebsiella pneumonia, Salmonella typhi, Acenitobacter spp, Campylobacter spp. Consumption of natural products such as tea may very well replace, minimize or obliterate this complicated situation. Keywords: Anti-bacterial, Tea, Camellia sinensis, Drug resistant bacteria, Antibiotic resistant bacteria, Synergism, Polyphenols.

scholarly journals MULTIDRUG-RESISTANT AND EXTREMELY DRUG-RESISTANT BACTERIA: ARE WE FACING THE END OF THE ANTIBIOTIC ERA?

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
G.M. Rossolini
Keyword(s):  
Antibiotic Resistance ◽  
Bacterial Infections ◽  
Multidrug Resistant ◽  
Modern Medicine ◽  
Infectious Complications ◽  
Future Perspective ◽  
Resistant Bacteria ◽  
Bacterial Strains ◽  
Public Health Agencies ◽  
Drug Resistant Bacteria

Antibiotics are one of the most significant advancements of modern medicine. They have changed the prognosis of several bacterial infections, and made possible advanced medical practices associated with a high risk of infectious complications. Unfortunately, antibiotics are affected by the phenomenon of antibiotic resistance, which jeopardizes their efficacy. In recent years, antibiotic discovery and development has been lagging, due to a lower appeal of this sector for the pharmaceutical industry, while antibiotic resistance has continued to evolve with the eventual emergence and dissemination of bacterial strains which are resistant to most available antibiotics and pose a major challenge to antimicrobial chemotherapy. This worrisome scenario, indicated as the “antibiotic resistance crisis”, has been acknowledged by Scientific Societies and Public Health Agencies, and is now gathering an increasing attention from the Media and Governments. This article reviews the antibiotic-resistant pathogens which currently pose major problems in terms of clinical and epidemiological impact, and briefly discuss future perspective in this field.

scholarly journals Mass Balance Study of the Engineered Cationic Antimicrobial Peptide, WLBU2, Following a Single Intravenous Dose of 14C-WLBU2 in Mice.

2020 ◽  
Vol 15 ◽  
Author(s):  
Jan H. Beumera ◽  
Jianxia Guo ◽  
Evan C. Ray ◽  
Jonas Scemama ◽  
Robert A. Parise ◽  
...  
Keyword(s):  
Multidrug Resistance ◽  
Antimicrobial Peptides ◽  
Mass Balance ◽  
Bacterial Infections ◽  
Resistant Bacteria ◽  
Drug Resistant ◽  
Balance Study ◽  
Drug Resistant Bacteria ◽  
Mouse Tissues ◽  
Mass Balance Study

Background: To address multidrug resistance we developed engineered cationic antimicrobial peptides (eCAPs). Lead eCAP WLBU2 displays potent activity against drug-resistant bacteria and effectively treats lethal bacterial infections in mice reducing bacterial loads to undetectable levels in diverse organs. Background: To address multidrug resistance we developed engineered cationic antimicrobial peptides (eCAPs). Lead eCAP WLBU2 displays potent activity against drug-resistant bacteria and effectively treats lethal bacterial infections in mice reducing bacterial loads to undetectable levels in diverse organs. Objective: To support development of WLBU2, we conducted a mass balance study. Methods: CD1 mice were administered 10, 15, 20 and 30 mg/kg QDx5 WLBU2 or a single dose of [14C]-WLBU2 at 15 mg/kg IV. Tolerability, tissue distribution and excretion were evaluated with liquid scintillation and HPLCradiochromatography. Results: The maximum tolerated dose of WLBU2 is 20 mg/kg IV. We could account for greater than >96% of the radioactivity distributed within mouse tissues at 5 and 15 min. By 24 h, only ~40-50% of radioactivity remained in the mice. The greatest % of the dose was present in liver, accounting for ~35% of radioactivity at 5 and 15 min, and ~ 8% of radioactivity remained at 24 h. High radioactivity was also present in kidneys, plasma, red blood cells and lungs, while less than 0.2% of radioactivity was present in brain, fat, or skeletal muscle. Urinary and fecal excretion accounted for 12.5 and 2.2% of radioactivity at 24 h. Conclusion: WLBU2 distributes widely to mouse tissues and is rapidly cleared with a terminal radioactivity half-life of 22 h, a clearance of 27.4 mL/h/kg, and a distribution volume of 0.94 L/kg. At 2-100 µg-eq/g, the concentrations of 14CWLBU2 appear high enough in the tissues to account for inhibition of microbial growth.

scholarly journals New Delhi metallo-beta-lactamase-1: A weapon for the newly emerging drug-resistant bacteria

2017 ◽  
Vol 69 (1) ◽  
pp. 29
Author(s):  
Sanghamitra Padhi
Keyword(s):  
Bacterial Infections ◽  
Medical Literature ◽  
Resistant Bacteria ◽  
New Delhi ◽  
Beta Lactamase ◽  
Drug Resistant ◽  
Recent Past ◽  
Bacterial Strains ◽  
Drug Resistant Bacteria ◽  
Micro Organisms

<p class="ABS">The world has seen the emergence of many micro-organisms in the recent past which can curb the human population with their newly built genetic make-up. The latest addition to this list of panic creating organisms is, bacteria encoding the gene for New Delhi metallo-beta-lactamase (NDM)-1. NDM-1 is an enzyme that can hydrolyse and inactivate carbapenems, which are used as a last resort for the treatment of multiresistant bacterial infections. Name of these bacteria were not found in the medical literature before December 2009, because of which it can take the credit of becoming a powerful emerging bacteria which are difficult to treat. Besides <span class="Italic">Escherichia</span><span class="CharOverride-2"> </span><span class="Italic">coli</span> and <span class="BoldItalic CharOverride-2">Klebsiella pneumoniae</span>, other bacterial strains have also expressed the gene for NDM-1, which are detected in many countries.</p><div> </div>

Silver nanoflower coupled with low dose antibiotics enables highly effective Drug-resistant bacteria eradication

2021 ◽  
Author(s):  
Xin Li ◽  
Xianting Ding ◽  
Khan Zara Ahmad ◽  
Jie He ◽  
Hongxia Li ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Low Dose ◽  
Multidrug Resistant ◽  
Effective Drug ◽  
Resistant Bacteria ◽  
Drug Resistant ◽  
Multidrug Resistant Bacteria ◽  
Effective Strategies ◽  
Drug Resistant Bacteria ◽  
Highly Effective

Due to the global overuse of antibiotics, multidrug-resistant bacteria (MDR) continuously call for effective strategies to tackle the antibiotic resistance crisis. Here, we develop a silver nanomaterial with a petal-like...

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