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Drug resistance microbial

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https://www.readbyqxmd.com/read/29775296/incorporation-of-a-theranostic-two-tone-luminescent-silver-complex-into-biocompatible-agar-hydrogel-composite-for-the-eradication-of-eskape-pathogens-in-a-skin-and-soft-tissue-infection-model
#1
Miguel N Pinto, Jorge Martinez-Gonzalez, Indranil Chakraborty, Pradip K Mascharak
Microbial invasion and colonization of the skin and underlying soft tissues are among the most common types of infections, becoming increasingly prevalent in hospital settings. Systemic antibiotic chemotherapies are now extremely limited due to emergence of drug-resistant Gram-positive and multidrug-resistant Gram-negative bacterial strains. Topical administration of antimicrobials provides an effective route for the treatment of skin and soft tissue infections (SSTIs). Therefore, the development of new and effective materials for the delivery of these agents is of paramount importance...
May 18, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29774759/melatonin-stimulated-biosynthesis-of-anti-microbial-znonps-by-enhancing-bio-reductive-prospective-in-callus-cultures-of-catharanthus-roseus-var-alba
#2
Hafiza Rida Riaz, Syed Salman Hashmi, Tariq Khan, Christophe Hano, Nathalie Giglioli-Guivarc'h, Bilal Haider Abbasi
Melatonin as plant growth regulator induces differential effects on metabolites that are responsible for reduction, capping and stabilization of zinc oxide nanoparticles. Phytochemical analysis of callus cultures was performed and results were compared with callus cultures supplemented with other plant growth regulators (α-napthalene acetic acid, 2,4-dichlorophenoxy acetic acid and thidiazuron). Highest total phenolic and flavonoid content [42.23 mg of gallic acid equivalent (GAE) g-1 DW and 36.4 mg of (quercetin equivalent) g-1 DW, respectively] were recorded at melatonin (1...
May 18, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29765203/identification-of-novel-drug-targets-in-bovine-respiratory-disease-an-essential-step-in-applying-biotechnologic-techniques-to-develop-more-effective-therapeutic-treatments
#3
Meena Kishore Sakharkar, Karthic Rajamanickam, Ramesh Chandra, Haseeb A Khan, Abdullah S Alhomida, Jian Yang
Background: Bovine Respiratory Disease (BRD) is a major problem in cattle production which causes substantial economic loss. BRD has multifactorial aetiologies, is multi-microbial, and several of the causative pathogens are unknown. Consequently, primary management practices such as metaphylactic antimicrobial injections for BRD prevention are used to reduce the incidence of BRD in feedlot cattle. However, this poses a serious threat in the form of development of antimicrobial resistance and demands an urgent need to find novel interventions that could reduce the effects of BRD drastically and also delay/prevent bacterial resistance...
2018: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/29760684/bioprospecting-deep-sea-actinobacteria-for-novel-anti-infective-natural-products
#4
Dongbo Xu, Linna Han, Chunhui Li, Qi Cao, Duolong Zhu, Nolan H Barrett, Dedra Harmody, Jing Chen, Haining Zhu, Peter J McCarthy, Xingmin Sun, Guojun Wang
The global prevalence of drug resistance has created an urgent need for the discovery of novel anti-infective drugs. The major source of antibiotics in current clinical practice is terrestrial actinobacteria; the less-exploited deep-sea actinobacteria may serve as an unprecedented source of novel natural products. In this study, we evaluated 50 actinobacteria strains derived from diverse deep water sponges and environmental niches for their anti-microbial activities against a panel of pathogens including Candida albicans , Clostridium difficile , Staphylococcus aureus , and methicillin-resistant S...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29752116/antimicrobial-and-anticancer-activities-of-silver-nanoparticles-synthesized-from-the-root-hair-extract-of-phoenix-dactylifera
#5
Mohammad Oves, Mohammad Aslam, Mohd Ahmar Rauf, Shariq Qayyum, Huda A Qari, Mohd Shahnawaz Khan, Mohammad Zubair Alam, Shams Tabrez, Arivalagan Pugazhendhi, Iqbal M I Ismail
There is a continuous rise in the rate of medicine consumption because of the development of drug resistance by microbial pathogens. In the last one decade, silver nanoparticles (AgNPs) have become a remarkable choice for the development of new drugs due to their excellent broad-spectrum antimicrobial activity. In the current piece of work, we have synthesized AgNPs from the root extract of Phoenix dactylifera to test their antimicrobial and anti-cancer potential. UV-visible spectra showed the surface plasmon resonance peak at 420 nm λmax corresponding to the formation of silver nanoparticles, FTIR spectra further confirmed the involvement of biological moieties in AgNPs synthesis...
August 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29742188/chlorine-dioxide-complex-cleanser-a-new-agent-with-rapid-efficacy-for-keratosis-pilaris
#6
Matthew J Zirwas, Jill Fichtel
Chlorine dioxide complex™ is a new molecule to dermatology that is a unique, non-toxic, broad spectrum anti-microbial and keratolytic compound. Chlorine dioxide has been used as an antiseptic in industrial settings for decades, primarily in water treatment facilities for municipal water supplies and food preparation. The compound has exceptional antiseptic properties with no known potential for development of resistance. It is a true keratolytic and anti-inflammatory, but is non-toxic to human tissue due to its unique mechanism of action...
May 1, 2018: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29739943/designer-cells-programming-quorum-sensing-interference-with-microbes
#7
Ferdinand Sedlmayer, Dennis Hell, Marius Müller, David Ausländer, Martin Fussenegger
Quorum sensing is a promising target for next-generation anti-infectives designed to address evolving bacterial drug resistance. The autoinducer-2 (AI-2) is a key quorum-sensing signal molecule which regulates bacterial group behaviors and is recognized by many Gram-negative and Gram-positive bacteria. Here we report a synthetic mammalian cell-based microbial-control device that detects microbial chemotactic formyl peptides through a formyl peptide sensor (FPS) and responds by releasing AI-2. The microbial-control device was designed by rewiring an artificial receptor-based signaling cascade to a modular biosynthetic AI-2 production platform...
May 8, 2018: Nature Communications
https://www.readbyqxmd.com/read/29730283/photodynamic-therapy-as-an-alternative-to-antibiotic-therapy-for-the-treatment-of-infected-leg-ulcers
#8
REVIEW
Aleksandra Kawczyk-Krupka, Barbara Pucelik, Anna Międzybrodzka, Aleksander Sieroń, Janusz M Dąbrowski
Infected leg ulcers are painful, debilitating and immensely reducing patient's quality of life, therefore they are becoming a more and more significant clinical and socioeconomic problems nowadays. Increasing resistance to antibiotics, drugs and therapies is one of the most urgent challenge in medicine worldwide and requires searching for a new, innovative and more efficient medical strategies. One of the opportunities for the cure of leg ulcers is photodynamic inactivation (PDI), that has been widely used in the treatment of various bacterial, fungal and viral infections...
May 3, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29726837/fracture-resistant-antibiofilm-adherent-self-assembled-pmma-zno-nanoformulations-for-biomedical-applications-physico-chemical-and-biological-perspectives-of-nano-reinforcement
#9
Indu Raj, Miran Mozetic, Jayachandran V Prabhu, Jiya Jose, Sabu Thomas, Nandakumar Kalarikkal
Antimicrobial, antibiofilm adherent, fracture resistant nano Zinc Oxide (ZnO NP) formulations based on poly methyl methacrylate (PMMA) matrix were developed by ex situ compression moulding technique in a facile manner. These formulations demonstrated potent, long-term biofilm-resisting effects against Candida Albicans (9000 CFU to 1000CFU) and Streptococcal Mutans. Proposed mechanism of biofilm resistance was the release of metallic ions/metal oxide by 'particle-corrosion'. MTT and cellular proliferation assays confirmed both qualitatively and quantitatively equal human skin fibroblast cell line proliferations (approximately 75%) on both PMMA/ZnO formulation and on neat PMMA...
May 4, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29723440/antimicrobial-activity-in-culturable-gut-microbial-communities-of-springtails
#10
Valeria Agamennone, Dick Roelofs, Nico M van Straalen, Thierry K S Janssens
AIMS: The rise of antibiotic resistance pushes the pharmaceutical industry to continually search for substances with new structures and novel mechanisms of action. Many environmental niches are still to be explored as sources of antimicrobials. In this paper we assess the antimicrobial potential of gut microbes of springtails, soil invertebrates which live in a microbe-dominated environment and are known to be tolerant to entomopathogenic microorganisms. METHODS AND RESULTS: Bacteria isolated from the guts of five springtail species were tested for inhibitory activity against different microbial pathogens...
May 3, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29712657/commonly-used-oncology-drugs-decrease-antifungal-effectiveness-against-candida-and-aspergillus-species
#11
Arielle Butts, Parker Reitler, Wenbo Ge, Jarrod R Fortwendel, Glen E Palmer
The incidence of invasive fungal infections has risen significantly in recent decades as medical interventions have become increasingly aggressive. These infections are extremely difficult to treat due to the extremely limited repertoire of systemic antifungals, the development of drug resistance, and the extent of to which the patient's immune function is compromised. Even when the appropriate antifungal therapies are administered in a timely fashion, treatment failure is common, frequently even in the absence of in vitro microbial resistance...
April 30, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29705666/the-pre-assembled-state-of-magainin-2-lysine-linked-dimer-determines-its-enhanced-antimicrobial-activity
#12
Esteban N Lorenzón, Thatyane M Nobre, Luciano Caseli, Eduardo M Cilli, Gabriel C A da Hora, Thereza A Soares, Osvaldo N Oliveira
Antimicrobial peptides (AMPs) are alternatives to conventional antibiotics against multi-drug resistant bacteria with low potential for developing microbial resistance. The design of such molecules requires understanding of the mechanisms of action, particularly the interaction with bacteria cell membranes. In this work, we determine the mechanism responsible for the higher activity against Escherichia coli of the C-terminal lysine dimer of magainin 2, (MG2)2 K, in comparison to the monomeric peptide magainin 2 (MG2)...
April 20, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29705358/abdominal-pain-of-cardiovascular-origin
#13
Pedro Epifânio, Maria Emanuel Amaral, Natália Noronha, Paula Martins, Dina Rodrigues, António Pires, Eduardo Castela
Infective endocarditis is a microbial infection of the endocardium and it is rare in the pediatric population. In children, congenital heart disease is one of the most important risk factors for developing infective endocarditis and can involve other structures in addition to cardiac valves. The prognosis is generally better than in other forms of endocarditis, although the average mortality rate in the pediatric population is 15-25%. Clinical manifestations can mimic other diseases such as meningitis and collagen-vascular disease or vasculitis...
April 25, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29702423/microbial-interactions-trigger-the-production-of-antibiotics
#14
REVIEW
Tina Netzker, Michal Flak, Mario Kc Krespach, Maria C Stroe, Jakob Weber, Volker Schroeckh, Axel A Brakhage
Since the discovery of penicillin, antibiotics have been instrumental in treating infectious diseases. However, emerging antibiotic multi-resistance coinciding with a nearly exhausted drug pipeline is a major concern for the future of the therapy of infections. A novel approach for the discovery of antibiotics relies on the analysis of microbial consortia in their ecological context, taking into account the potential natural role of antibiotics. Co-cultivations of microorganisms have been successfully applied for the isolation of unknown secondary metabolites including antibiotics, and, thus, open new avenues to the production of bioactive compounds while at the same time providing insight into the natural function of the produced molecules and the regulation of their formation...
April 24, 2018: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/29702266/genome-sequence-of-mycobacterium-yongonense-rt-955-2015-isolate-from-a-patient-misdiagnosed-with-multi-drug-resistant-tuberculosis-first-clinical-isolate-in-tanzania
#15
Nicholaus Peter Mnyambwa, Dong-Jin Kim, Esther Ngadaya, Jongsik Chun, Sung-Min Ha, Pammla Petrucka, Kennedy Kwasi Addo, Rudovick R Kazwala, Sayoki G Mfinanga
BACKGROUND: Mycobacterium yongonense is a recently described novel species belonging to Mycobacterium avium complex which is the most prevalent etiology of non-tuberculous mycobacteria associated with pulmonary infections, and posing tuberculosis diagnostic challenges in high-burden, resource-constrained settings. METHODS: We used whole genome shotgun sequencing and comparative microbial genomic analyses to characterize the isolate from a patient diagnosed with multi-drug resistant tuberculosis (MDR-TB) after relapse...
April 24, 2018: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29701657/characterization-of-silver-nanomaterials-derived-from-marine-streptomyces-sp-al-dhabi-87-and-its-in-vitro-application-against-multidrug-resistant-and-extended-spectrum-beta-lactamase-clinical-pathogens
#16
Naif Abdullah Al-Dhabi, Abdul-Kareem Mohammed Ghilan, Mariadhas Valan Arasu
A novel antagonistic marine Streptomyces sp. Al-Dhabi-87 that was recovered from the Gulf region of Saudi Arabia was used to synthesize silver nanoparticles (NP) from the culture free extract. The produced NP were confirmed by UV-visible spectroscopy (UV-Vis), high-resolution scanning electron microscope (HRSEM), transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FTIR), Energy Dispersive Spectroscopy (EDAX), and X-ray Powder Diffraction (XRD), and broth micro dilution techniques were employed for the determination of minimum inhibitory concentrations (MIC) values...
April 26, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29697128/supramolecular-hydrogels-for-antimicrobial-therapy
#17
Benhui Hu, Cally Owh, Pei Lin Chee, Wan Ru Leow, Xuan Liu, Yun-Long Wu, Peizhi Guo, Xian Jun Loh, Xiaodong Chen
The emergence of drug-resistant microbes has become a threat to global health, and microbial infections severely limit the use of healthcare materials. To achieve efficient antimicrobial therapy, supramolecular hydrogels demonstrate unprecedented advantages in medical applications due to the tunable and reversible nature of their supramolecular interactions and the capability of hydrogels to incorporate various therapeutic agents. Herein, antimicrobial hydrogels are categorized according to their inherent antimicrobial properties or based on their roles in encapsulating antimicrobial materials...
April 26, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/29695695/-increase-in-bacterial-resistance-to-antibiotics-after-cancer-therapy-with-platinum-based-drugs
#18
V A Chistyakov, E V Prazdnova, M S Mazanko, M N Churilov, V K Chmyhalo
The use of platinum-based anticancer drugs is limited by both their side effects and their effect on normal microflora's metagenome. Drugs that possess mutagenic and genotoxic properties may cause mutations in microbial genomes that contribute to the emergence of resistance to antimicrobial preparations and the development of complications after chemotherapy. The effects of cisplatin and oxaliplatin on microorganisms were studied using bacterial biosensors - E. coli strains MG1655 pKatG-lux, which reacts to the generation of hydrogen peroxide; MG1655 pSoxS-lux, which reacts to the superoxide anion radical; and the MG1655 pColD-lux strain, which detects DNA damage...
March 2018: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/29693574/liver-transplantation-and-gut-microbiota-profiling-in-a-child-colonized-by-a-multi-drug-resistant-klebsiella-pneumoniae-a-new-approach-to-move-from-antibiotic-to-eubiotic-control-of-microbial-resistance
#19
Federica Del Chierico, Sabrina Cardile, Andrea Pietrobattista, Daniela Liccardo, Alessandra Russo, Manila Candusso, Maria Sole Basso, Chiara Grimaldi, Laura Pansani, Paola Bernaschi, Giuliano Torre, Lorenza Putignani
The increase of microorganisms multi-drug resistant (MDR) to antibiotics (ATBs) is becoming a global emergency, especially in frail subjects. In chronic liver disease (LD) with indications for liver transplantation (LT), MDR colonization can significantly affect the LT outcome. However, no clear guidelines for microbial management are available. A novel approach toward MDR-colonized patients undergoing LT was developed at our Center refraining from ATBs use during the transplant waiting list, and use of an intensive perioperative prophylaxis cycle...
April 25, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29692778/new-players-in-immunity-to-tuberculosis-the-host-microbiome-lung-epithelium-and-innate-immune-cells
#20
REVIEW
Nancy Gupta, Rakesh Kumar, Babita Agrawal
Tuberculosis (TB) is a highly contagious infection and devastating chronic disease, causing 10.4 million new infections and 1.8 million deaths every year globally. Efforts to control and eradicate TB are hampered by the rapid emergence of drug resistance and limited efficacy of the only available vaccine, BCG. Immunological events in the airways and lungs are of major importance in determining whether exposure to Mycobacterium tuberculosis ( Mtb ) results in successful infection or protective immunity. Several studies have demonstrated that the host microbiota is in constant contact with the immune system, and thus continually directs the nature of immune responses occurring during new infections...
2018: Frontiers in Immunology
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