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https://www.readbyqxmd.com/read/29232642/feasibility-of-the-uv-aa-process-as-a-pretreatment-approach-for-bioremediation-of-dye-laden-wastewater
#1
Minghui Yang, Bingdang Wu, Qiuhao Li, Xiaofeng Xiong, Haoran Zhang, Yu Tian, Jiawen Xie, Ping Huang, Suo Tan, Guodong Wang, Li Zhang, Shujuan Zhang
Biodegradability and toxicity are two important indexes in considering the feasibility of a chemical process for environmental remediation. The acetylacetone (AA) mediated photochemical process has been proven as an efficient approach for dye decolorization. Both AA and its photochemical degradation products had a high bioavailability. However, the biocompatibility and ecotoxicology of the UV/AA treated solutions are unclear yet. In the present work, we evaluated the biocompatibility and toxicity of the UV/AA treated solutions at both biochemical and organismal levels...
December 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/29231976/reduced-salivary-flow-rate-and-high-levels-of-oxidative-stress-in-whole-saliva-of-children-with-down-syndrome
#2
Natália Bertolo Domingues, Matheus Racy Mariusso, Marcia Hiromi Tanaka, Raquel Mantuaneli Scarel-Caminaga, Marcia Pinto Alves Mayer, Fernanda Lourenção Brighenti, Ângela Cristina Cilense Zuanon, Flávia Kazue Ibuki, Fernando Neves Nogueira, Elisa Maria Aparecida Giro
AIM: To investigate salivary parameters between children with Down Syndrome (DS) and without DS. MATERIALS AND METHODS: Stimulated whole saliva was collected from 18 children with DS and 23 without DS. Salivary flow rate, pH, and salivary buffering capacity were determined. Cariogenic microorganisms were quantified by culture, and periodontopathogens by quantitative real-time polymerase chain reaction. The antioxidant profile was quantified spectrophotometrically, while malondialdehyde (MDA) was quantified by high-performance liquid chromatography...
December 12, 2017: Special Care in Dentistry
https://www.readbyqxmd.com/read/29231910/-clinical-pictures-of-borreliosis
#3
EDITORIAL
Tadeusz Płusa
Lyme disease occurs in a variety of clinical manifestations, ranging from skin lesions, through musculoskeletal, neurological, and cardiac syndrome, to severe irreversible lesions. Borrelia burgdorferi's organotropy has an impact on the development of the disease. In initial management, it is important to implement effective treatment to prevent further progression of infection. Dominant skin lesions should be differentiated in detail. In the form of disseminated disease complex of clinical syndromes is observed but it requires of confirmation in immunoassays...
November 23, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29231854/nisin-in-combination-with-cinnamaldehyde-and-edta-to-control-growth-of-escherichia-coli-strains-of-swine-origin
#4
Des Field, Inès Baghou, Mary C Rea, Gillian E Gardiner, R Paul Ross, Colin Hill
Post-weaning diarrhoea (PWD) due to enterotoxigenic Escherichia coli (ETEC) is an economically important disease in pig production worldwide. Although antibiotics have contributed significantly to mitigate the economic losses caused by PWD, there is major concern over the increased incidence of antimicrobial resistance among bacteria isolated from pigs. Consequently, suitable alternatives that are safe and effective are urgently required. Many naturally occurring compounds, including the antimicrobial peptide nisin and a number of plant essential oils, have been widely studied and are reported to be effective as antimicrobial agents against pathogenic microorganisms...
December 12, 2017: Antibiotics
https://www.readbyqxmd.com/read/29231844/collismycin-c-from-the-micronesian-marine-bacterium-streptomyces-sp-mc025-inhibits-staphylococcus-aureus-biofilm-formation
#5
Jin-Hyung Lee, Eonmi Kim, Hyukjae Choi, Jintae Lee
Biofilm formation plays a critical role in antimicrobial resistance in Staphylococcus aureus. Here, we investigated the potential of crude extracts of 79 Micronesian marine microorganisms to inhibit S. aureus biofilm formation. An extract of Streptomyces sp. MC025 inhibited S. aureus biofilm formation. Bioactivity-guided isolation led to the isolation of a series of 2,2'-bipyridines: collismycin B (1), collismycin C (2), SF2738 D (3), SF2738 F (4), pyrisulfoxin A (5), and pyrisulfoxin B (6). Among these bipyridines, collismycin C (2) was found to be the most effective inhibitor of biofilm formation by methicillin-sensitive S...
December 12, 2017: Marine Drugs
https://www.readbyqxmd.com/read/29231774/modern-management-of-diabetic-foot-osteomyelitis-the-when-how-and-why-of-conservative-approaches
#6
Javier Aragón-Sánchez, Benjamin A Lipsky
Introduction Diabetic foot osteomyelitis (DFO) has long been considered a complex infection that is both difficult to diagnose and treat, and is associated with a high rate of relapse and limb loss. Areas covered DFO can usually be diagnosed by a combination of clinical evaluation, serum inflammatory markers and plain X-ray. When the results of these procedures are negative or contradictory, advanced imaging tests or bone biopsy may be necessary. Staphylococcus aureus remains the most frequent microorganism isolated from bone specimens, but infection is often polymicrobial...
December 12, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/29231755/pharmaceutical-aspects-of-silver-nanoparticles
#7
Prateek Mathur, Swati Jha, Suman Ramteke, N K Jain
Silver nanoparticles are particles in the size ranging between 1 and 100 nm. The two major methods used for synthesis of silver nanoparticle are the physical and chemical methods with the disadvantage that they are expensive and can also have toxicity. Biological method is being used as an expedient alternative, as this approach is environment-friendly and less toxic and it includes plant extracts, microorganism, fungi, etc. The major applications of silver nanoparticles in the medical field include diagnostic applications and therapeutic applications, apart from its antimicrobial activity...
December 12, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29230650/available-forms-of-nutrients-and-heavy-metals-control-the-distribution-of-microbial-phospholipid-fatty-acids-in-sediments-of-the-three-gorges-reservoir-china
#8
Hongyang Sun, Yanhong Wu, Haijian Bing, Jun Zhou, Na Li
The construction of the Three Gorges Reservoir (TGR) as well as the development of local industry and agriculture not only had tremendous impacts on the environment but also affected human health. Although water, soil, and air in the TGR have been well studied for environmental risk assessment, very little information is available on benthic sediments and microorganisms. In this study, sedimentary samples were collected along the main stream of the TGR to examine microbial phospholipid fatty acids (PLFA) and relevant variables (e...
December 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29230345/new-trends-for-the-evaluation-of-heat-treatments-of-milk
#9
REVIEW
Mena Ritota, Maria Gabriella Di Costanzo, Maria Mattera, Pamela Manzi
Milk is generally very rich in nutrients and this may lead it to be an ideal growth environment for many microorganisms, including pathogens, so effective measurements aiming to ensure total microbiological safety of milk and minimize the risk to human health are needed. Milk heat treatments are the most common practices carried out to inhibit the microbial growth; therefore it is necessary to have analytical procedures that are more and more up-to-date and capable of detecting the effectiveness of the heat treatments...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29230225/sensing-lipids-with-mincle-structure-and-function
#10
REVIEW
Spencer J Williams
Mincle is a C-type lectin receptor that has emerged as an important player in innate immunity through its capacity to recognize a wide range of lipidic species derived from damaged/altered self and foreign microorganisms. Self-ligands include sterols (e.g., cholesterol), and β-glucosylceramides, and the protein SAP130, which is released upon cell death. Foreign lipids comprise those from both microbial pathogens and commensals and include glycerol, glucose and trehalose mycolates, and glycosyl diglycerides...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29230218/endogenous-antimicrobial-peptide-expression-in-response-to-bacterial-epidermal-colonization
#11
REVIEW
Michael Brandwein, Zvi Bentwich, Doron Steinberg
Bacterial commensal colonization of human skin is vital for the training and maintenance of the skin's innate and adaptive immune functions. In addition to its physical barrier against pathogen colonization, the skin expresses a variety of antimicrobial peptides (AMPs) which are expressed constitutively and induced in response to pathogenic microbial stimuli. These AMPs are differentially effective against a suite of microbial skin colonizers, including both bacterial and fungal residents of the skin. We review the breadth of microorganism-induced cutaneous AMP expression studies and their complementary findings on the efficacy of skin AMPs against different bacterial and fungal species...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29230214/exome-sequencing-identifies-a-novel-map3k14-mutation-in-recessive-atypical-combined-immunodeficiency
#12
Nikola Schlechter, Brigitte Glanzmann, Eileen Garner Hoal, Mardelle Schoeman, Britt-Sabina Petersen, Andre Franke, Yu-Lung Lau, Michael Urban, Paul David van Helden, Monika Maria Esser, Marlo Möller, Craig Kinnear
Primary immunodeficiency disorders (PIDs) render patients vulnerable to infection with a wide range of microorganisms and thus provide good in vivo models for the assessment of immune responses during infectious challenges. Priming of the immune system, especially in infancy, depends on different environmental exposures and medical practices. This may determine the timing and phenotype of clinical appearance of immune deficits as exemplified with early exposure to Bacillus Calmette-Guérin (BCG) vaccination and dissemination in combined immunodeficiencies...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29230210/checkpoint-blockade-toxicity-and-immune-homeostasis-in-the-gastrointestinal-tract
#13
REVIEW
Michael Dougan
Monoclonal antibodies targeting the regulatory immune "checkpoint" receptors CTLA-4, PD-1, and PD-L1 are now standard therapy for diverse malignancies including melanoma, lung cancer, and renal cell carcinoma. Although effective in many patients and able to induce cures in some, targeting these regulatory pathways has led to a new class of immune-related adverse events. In many respects, these immune toxicities resemble idiopathic autoimmune diseases, such as inflammatory bowel disease, autoimmune hepatitis, rheumatoid arthritis, and vitiligo...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29230202/development-of-a-novel-escherichia-coli-kocuria-shuttle-vector-using-the-cryptic-pkpal3-plasmid-from-k-palustris-ipufs-1-and-its-utilization-in-producing-enantiopure-s-styrene-oxide
#14
Hiroshi Toda, Nobuya Itoh
The novel cryptic pKPAL3 plasmid was isolated from the Gram-positive microorganism Kocuria palustris IPUFS-1 and characterized in detail. pKPAL3 is a circular plasmid that is 4,443 bp in length. Open reading frame (ORF) and homology search analyses indicated that pKPAL3 possesses four ORFs; however, there were no replication protein coding genes predicted in the plasmid. Instead, there were two nucleotide sequence regions that showed significant identities with untranslated regions of K. rhizophila DC2201 (NBRC 103217) genomic sequences, and these sequences were essential for autonomous replication of pKPAL3 in Kocuria cells...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29229989/necroptotic-signaling-is-primed-in-mycobacterium-tuberculosis-infected-macrophages-but-its-pathophysiological-consequence-in-disease-is-restricted
#15
Michael D Stutz, Samar Ojaimi, Cody Allison, Simon Preston, Philip Arandjelovic, Joanne M Hildebrand, Jarrod J Sandow, Andrew I Webb, John Silke, Warren S Alexander, Marc Pellegrini
Mixed lineage kinase domain-like (MLKL)-dependent necroptosis is thought to be implicated in the death of mycobacteria-infected macrophages, reportedly allowing escape and dissemination of the microorganism. Given the consequent interest in developing inhibitors of necroptosis to treat Mycobacterium tuberculosis (Mtb) infection, we used human pharmacologic and murine genetic models to definitively establish the pathophysiological role of necroptosis in Mtb infection. We observed that Mtb infection of macrophages remodeled the intracellular signaling landscape by upregulating MLKL, TNFR1, and ZBP1, whilst downregulating cIAP1, thereby establishing a strong pro-necroptotic milieu...
December 11, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29228818/evaluation-of-herbal-concoctions-sold-at-ga-maja-limpopo-province-in-south-africa-and-in-vitro-pharmacological-evaluation-of-plants-used-to-manufacture-the-concoctions
#16
Mash M Matotoka, Peter Masoko
The aim of the study was to evaluate the biological activities and safety of commercial herbal concoctions manufactured in Ga Maja (Limpopo province). Microbial contamination was evaluated by spread-plating the concoctions on agar plates. The VITEK 2 instrument was used for identification of the pure cultures. Nutritional content of the concoctions was determined. Thin layer chromatography was used to analyze the chemical constituents of the extracts. The microdilution assay and bioautography were used to evaluate antimicrobial activity against selected microorganisms...
January 1, 2017: Journal of Evidence-based Complementary & Alternative Medicine
https://www.readbyqxmd.com/read/29228814/cold-adapted-enzymes-produced-by-fungi-from-terrestrial-and-marine-antarctic-environments
#17
Alysson Wagner Fernandes Duarte, Juliana Aparecida Dos Santos, Marina Vitti Vianna, Juliana Maíra Freitas Vieira, Vitor Hugo Mallagutti, Fabio José Inforsato, Lia Costa Pinto Wentzel, Luciana Daniela Lario, Andre Rodrigues, Fernando Carlos Pagnocca, Adalberto Pessoa Junior, Lara Durães Sette
Antarctica is the coldest, windiest, and driest continent on Earth. In this sense, microorganisms that inhabit Antarctica environments have to be adapted to harsh conditions. Fungal strains affiliated with Ascomycota and Basidiomycota phyla have been recovered from terrestrial and marine Antarctic samples. They have been used for the bioprospecting of molecules, such as enzymes. Many reports have shown that these microorganisms produce cold-adapted enzymes at low or mild temperatures, including hydrolases (e...
December 11, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/29228375/influence-of-temperature-on-in-vitro-zoosporogenesis-of-pythium-insidiosum
#18
Cristina Gomes Zambrano, Angelita Reis Gomes, Carolina Litchina Brasil, Júlia de Souza Silveira Valente, Carolina Quintana Braga, Maria Isabel de Azevedo, Sônia de Avila Botton, Daniela Isabel Brayer Pereira
This study verified the influence of different temperatures on P. insidiosum in vitro zoosporogenesis. P. insidiosum isolates (n = 26) were submitted to zoosporogenesis and incubated at 5°C, 15°C, 20°C and 37°C (1st stage). Grass fragments were evaluated under optical microscopy at 4, 8, and 24 hours of incubation. Afterward, all isolates were incubated at 37°C and assessed at the same periods of time (2nd stage). The development of hyphae, presence of vesicles, zoosporangia and zoospores were checked...
December 8, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29228322/tlr9-stimulation-induces-increase-in-fungicidal-activity-of-human-dendritic-cells-challenged-with-paracoccidioides-brasiliensis
#19
Ivy Rafacho Vieira, Reginaldo Keller Fernandes, Daniela Ramos Rodrigues, Carolina Mendonça Gorgulho, Ramon Kaneno, Ângela Maria Victoriano Campos Soares
Microorganisms killing by dendritic cells (DCs) is an important effector mechanism during innate immune response, as it can avoid dissemination of infection during migration of these cells toward draining lymph nodes. However, this function depends on pattern recognition receptors (PRRs) to which the microorganism will bind in these cells. Regarding this, TLR9 activation, by stimulating the oxidative metabolism, induces increase in microbicidal activity of these cells. Accordingly, we showed that DCs treatment with a TLR9 agonist results in an increase in fungicidal activity of these cells against the fungus Paracoccidioides brasiliensis (Pb), which however, was not associated to higher H2O2 levels...
December 8, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29228246/clinical-impact-of-candida-spp-biofilm-production-in-a-cohort-of-patients-with-candidemia
#20
Priscilla Morais Monfredini, Ana Carolina Remondi Souza, Renan Pelluzzi Cavalheiro, Ricardo Andreotti Siqueira, Arnaldo Lopes Colombo
Persistent candidemia refers to the continued isolation of the same Candida species in the blood of a candidemic patient despite appropriate therapy. Despite the clinical importance of persistent candidemia, studies have superficially addressed the biological conditions behind this phenomenon. The aim of this study was to evaluate the correlation between the biofilm-forming ability by Candida bloodstream isolates and the persistence of infection. A total of 55 isolates of Candida were tested and characterized in two groups: (i) group I, which included seven patients with persistent candidemia, and (ii) group II, which included 18 patients with nonpersistent candidemia...
December 8, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
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