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https://www.readbyqxmd.com/read/29169147/c-type-lectin-receptors-in-anti-fungal-immunity
#1
REVIEW
Moe Shiokawa, Sho Yamasaki, Shinobu Saijo
Host immune systems are constantly engaged with fungal pathogens which are common in environments as well as in healthy human skin and mucosa. C-type lectin receptors (CLRs) are expressed in myeloid cells and play central roles in host defenses against fungal infections by coordinating innate and adaptive immune systems. Upon ligand binding, CLRs stimulate cellular responses by inducing the production of cytokines and reactive oxygen species via the Syk/CARD9 signaling pathway, leading to fungal elimination...
November 20, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/29167801/breaking-the-bad-bacillus-blocks-fungal-virulence-factors
#2
COMMENT
François L Mayer, James W Kronstad
Fungal pathogens rely on the production of specific virulence factors during infection. Inhibiting such factors generally results in reduced fungal pathogenicity. Most studies in the past have focused on understanding the molecular mechanisms of fungal virulence factor expression during mono-culture, or during interaction with the host. However, a potentially important, second type of interaction has been less well studied thus far - the interplay of fungal pathogens of humans with other microbes found in their natural habitat...
October 30, 2017: Microbial Cell
https://www.readbyqxmd.com/read/29166928/effects-of-long-term-weekly-iron-and-folic-acid-supplementation-on-lower-genital-tract-infection-a-double-blind-randomised-controlled-trial-in-burkina-faso
#3
Loretta Brabin, Stephen A Roberts, Sabine Gies, Andrew Nelson, Salou Diallo, Christopher J Stewart, Adama Kazienga, Julia Birtles, Sayouba Ouedraogo, Yves Claeys, Halidou Tinto, Umberto d'Alessandro, E Brian Faragher, Bernard Brabin
BACKGROUND: Provision of routine iron supplements to prevent anaemia could increase the risk for lower genital tract infections as virulence of some pathogens depends on iron availability. This trial in Burkina Faso assessed whether weekly periconceptional iron supplementation increased the risk of lower genital tract infection in young non-pregnant and pregnant women. METHODS: Genital tract infections were assessed within a double blind, controlled, non-inferiority trial of malaria risk among nulliparous women, randomised to receive either iron and folic acid or folic acid alone, weekly, under direct observation for 18 months...
November 23, 2017: BMC Medicine
https://www.readbyqxmd.com/read/29163441/antifungal-and-anti-biofilm-activity-of-essential-oil-active-components-against-cryptococcus-neoformans-and-cryptococcus-laurentii
#4
Poonam Kumari, Rutusmita Mishra, Neha Arora, Apurva Chatrath, Rashmi Gangwar, Partha Roy, Ramasare Prasad
Cryptococcosis is an emerging and recalcitrant systemic infection occurring in immunocompromised patients. This invasive fungal infection is difficult to treat due to the ability of Cryptococcus neoformans and Cryptococcus laurentii to form biofilms resistant to standard antifungal treatment. The toxicity concern of these drugs has stimulated the search for natural therapeutic alternatives. Essential oil and their active components (EO-ACs) have shown to possess the variety of biological and pharmacological properties...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29162707/cd4-t-cells-orchestrate-lethal-immune-pathology-despite-fungal-clearance-during-cryptococcus-neoformans-meningoencephalitis
#5
Lori M Neal, Enze Xing, Jintao Xu, Jessica L Kolbe, John J Osterholzer, Benjamin M Segal, Peter R Williamson, Michal A Olszewski
Cryptococcus neoformans is a major fungal pathogen that disseminates to the central nervous system (CNS) to cause fatal meningoencephalitis, but little is known about immune responses within this immune-privileged site. CD4(+) T cells have demonstrated roles in anticryptococcal defenses, but increasing evidence suggests that they may contribute to clinical deterioration and pathology in both HIV-positive (HIV+) and non-HIV patients who develop immune reconstitution inflammatory syndrome (IRIS) and post-infectious inflammatory response syndrome (PIIRS), respectively...
November 21, 2017: MBio
https://www.readbyqxmd.com/read/29162063/elevated-aspergillus-specific-antibody-levels-among-hiv-infected-ugandans-with-pulmonary-tuberculosis
#6
Richard Kwizera, Rosalind Parkes-Ratanshi, Iain D Page, Christine Sekaggya-Wiltshire, Joseph Musaazi, Jan Fehr, Barbara Castelnuovo, Andrew Kambugu, David W Denning
BACKGROUND: The incidence of tuberculosis (TB) is high among human immunodeficiency virus (HIV) infected Ugandans. Recent evidence suggests that Chronic Pulmonary Aspergillosis and Aspergillus sensitisation might be responsible for significant mortality in patients treated for tuberculosis in Uganda. METHODS: We retrieved and tested paired serum aliquots for 101 HIV-TB co-infected patients at the beginning and week 24 of TB treatment. We tested samples for Aspergillus-specific immunoglobulin G (IgG) and immunoglobulin E (IgE) using ImmunoCAP®; and Aspergillus-specific IgG and total serum IgE using Immulite® immunoassays...
November 21, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29160732/optimization-and-characterization-of-sertaconazole-nitrate-flexisomes-embedded-in-hydrogel-for-improved-antifungal-activity
#7
Satish K Mandlik, Shridhar S Siras, Kiran R Birajdar
The aim of the present research work was to develop, characterize and optimize sertaconazole nitrate (STZN) embedded flexisomes (STZN-FS) to improve the cutaneous anti-fungal activity of STZN. Flexisomes are self-aggregating, flexible, deformable lipidic vesicles possessing an aqueous core. A 3(2) factorial design was implemented to optimize the effects of the critical material attributes of concentration of phospholipid (X1) and edge activator (X2) on the critical quality attributes of particle size (Y1), entrapment efficiency (Y2) and deformability index (Y3)...
November 21, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/29159425/novel-biosynthetic-pathway-for-sulfur-amino-acids-in-cryptococcus-neoformans
#8
Akio Toh-E, Misako Ohkusu, Kiminori Shimizu, Naruhiko Ishiwada, Akira Watanabe, Katsuhiko Kamei
We elucidated a unique feature of sulfur metabolism in Cryptococcus neoformans. C. neoformans produces cysteine solely by the O-acetylserine pathway that consists of serine-O-acetyl transferase and cysteine synthase. We designated the gene encoding the former enzyme CYS2 (locus tag CNE02740) and the latter enzyme CYS1 (locus tag CNL05880). The cys1Δmutant strain was found to be avirulent in a murine infection model. Methionine practically does not support growth of the cys1Δ strain, and cysteine does not serve as a methionine source, indicating that the transsulfuration pathway does not contribute to sulfur amino acid synthesis in C...
November 20, 2017: Current Genetics
https://www.readbyqxmd.com/read/29158974/whole-genome-sequencing-of-rhodotorula-mucilaginosa-isolated-from-the-chewing-stick-distemonanthus-benthamianus-insights-into-rhodotorula-phylogeny-mitogenome-dynamics-and-carotenoid-biosynthesis
#9
Han Ming Gan, Bolaji N Thomas, Nicole T Cavanaugh, Grace H Morales, Ashley N Mayers, Michael A Savka, André O Hudson
In industry, the yeast Rhodotorula mucilaginosa is commonly used for the production of carotenoids. The production of carotenoids is important because they are used as natural colorants in food and some carotenoids are precursors of retinol (vitamin A). However, the identification and molecular characterization of the carotenoid pathway/s in species belonging to the genus Rhodotorula is scarce due to the lack of genomic information thus potentially impeding effective metabolic engineering of these yeast strains for improved carotenoid production...
2017: PeerJ
https://www.readbyqxmd.com/read/29158685/invasive-aspergillus-terreus-morphological-transitions-and-immunoadaptations-mediating-antifungal-resistance
#10
Louis Bengyella, Elsie Laban Yekwa, Muhammad Nasir Subhani, Ernest Tambo, Kiran Nawaz, Bakoena Ashton Hetsa, Sehrish Iftikhar, Sayanika Devi Waikhom, Pranab Roy
Background and aims: Aspergillus terreus Thom is a pathogen of public health and agricultural importance for its seamless abilities to expand its ecological niche. The aim of this study was holistically to investigate A. terreus morphological and immunoadaptations and their implication in antifungal resistance and proliferation during infection. Materials and methods: In-depth unstructured mining of relevant peer-reviewed literature was performed for A. terreus morphological, immune, resistance, and genetic diversity based on the sequenced calmodulin-like gene...
2017: Infection and Drug Resistance
https://www.readbyqxmd.com/read/29154044/modulating-host-immune-responses-to-fight-invasive-fungal-infections
#11
REVIEW
James E Scriven, Mark W Tenforde, Stuart M Levitz, Joseph N Jarvis
Modulation of host immunity in invasive fungal infection is an appealing but as yet mostly elusive treatment strategy. Animal studies in invasive candidiasis and aspergillosis have demonstrated beneficial effects of colony stimulating factors, interferon-gamma and monoclonal antibodies. More recent studies transfusing leukocytes pre-loaded with lipophilic anti-fungal drugs, or modulated T-cells, along with novel vaccination strategies show great promise. The translation of immune therapies into clinical studies has been limited to date but this is changing and the results of new Candida vaccine trials are eagerly awaited...
November 15, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/29150834/il-22-neutralizing-autoantibodies-impair-fungal-clearance-in-murine-oropharyngeal-candidiasis-model
#12
Rudolf Bichele, Jaanika Kärner, Kai Truusalu, Imbi Smidt, Reet Mändar, Heather R Conti, Sarah L Gaffen, Pärt Peterson, Martti Laan, Kai Kisand
Protection against mucocutaneous candidiasis depends on the T helper (Th)17 pathway, as gene defects affecting its integrity result in inability to clear Candida albicans infection on body surfaces. Moreover, autoantibodies neutralizing Th17 cytokines have been related to chronic candidiasis in a rare inherited disorder called autoimmune polyendocriopathy candidiasis ectodermal dystrophy (APECED) caused by mutations in autoimmune regulator (AIRE) gene. However, the direct pathogenicity of these autoantibodies has not yet been addressed...
November 17, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/29144588/varicuothiols-a-and-b-new-fungal-metabolites-from-aspergillus-versicolor-with-anti-inflammatory-activities
#13
Ran Chen, Dong Liu, Peng Guo, Wenhan Lin
Chemical examination of a coral-associated fungus Aspergillus versicolor LZD-44-03 resulted in the isolation of two new compounds with the trivial names of varicuothiols A (1) and B (2) as a unique scaffold. Their structures were determined through extensive spectroscopic analyses in association with the modified Mosher's method and chemical conversion. Both 1 and 2 exhibited significant inhibition against LPS-induced RAW24.7 cell proliferation, in association with the down regulation of nitrite production and cytokines (MCP-1, IL-6, and TNF-α)...
November 16, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29142562/drug-poisoning-and-associated-factors-in-western-saudi-arabia-a-five-year-retrospective-chart-review-2011-2016
#14
Sami H Alzahrani, Ali H Alqahtani, Fayssal Mostafa Farahat, Mohammed Abdel Galil Elnour, Jamil Bashawri
Objective: Drug poisoning is a globally common cause of emergency-room admissions. This study explores drug-poisoning prevalence patterns, associated risk factors (gender, age and exposure circumstances), and outcomes in western Saudi Arabia. Methods: Retrospective analysis of Clinical drug poisoning cases (2011-2016). The data were retrieved from the Saudi Ministry of Health's record and Patients' medical charts were analyzed. Results: The Ministry of Health received 1,474 reports of drug poisoning during 2011-2016...
September 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29140934/response-of-symptomatic-persistent-chronic-disseminated-candidiasis-to-corticosteroid-therapy-in-immunosuppressed-pediatric-patients-case-study-and-review-of-the-literature
#15
Vered Shkalim-Zemer, Itzhak Levi, Salvador Fischer, Hannah Tamary, Joanne Yakobovich, Gali Avrahami, Gil Gilad, Sara Elitzur, Isaac Yaniv, Ronit Elhasid, Michal Manistersky, Itamar Shalit
BACKGROUND: Chronic disseminated candidiasis (CDC) is a severe invasive fungal infection principally observed during neutrophil recovery in patients with acute leukemia treated with intensive chemotherapy. Its pathophysiology remains unclear. We describe the management of six children with symptomatic CDC who did not respond to antifungal therapy. METHODS: The databases of the hematology-oncology departments of two tertiary pediatric medical centers were searched for all patients diagnosed with CDC from 2003 to 2015 who responded to corticosteroids after failing antifungal therapy...
November 14, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29137671/herpes-simplex-virus-1-entrapped-in-candida-albicans-biofilm-displays-decreased-sensitivity-to-antivirals-and-uva1-laser-treatment
#16
Cristian Ascione, Arianna Sala, Elham Mazaheri-Tehrani, Simona Paulone, Beniamino Palmieri, Elisabetta Blasi, Claudio Cermelli
BACKGROUND: Recently, we published data suggesting a mutualistic relationship between HSV-1 and Candida. albicans; in particular: (a) HSV-1 infected macrophages are inhibited in their anti-Candida effector function and (b) Candida biofilm protects HSV-1 from inactivation. The present in vitro study is aimed at testing the effects of Candida biofilm on HSV-1 sensitivity to pharmacological and physical stress, such as antiviral drugs (acyclovir and foscarnet) and laser UVA1 irradiation...
November 14, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/29135948/effect-of-a-lactobacillus-salivarius-probiotic-on-a-double-species-streptococcus-mutans-and-candida-albicans-caries-biofilm
#17
Wirginia Krzyściak, Dorota Kościelniak, Monika Papież, Palina Vyhouskaya, Katarzyna Zagórska-Świeży, Iwona Kołodziej, Beata Bystrowska, Anna Jurczak
The aim of the study was to evaluate the anti-cariogenic effects of Lactobacillus salivarius by reducing pathogenic species and biofilm mass in a double-species biofilm model. Coexistence of S. mutans with C. albicans can cause dental caries progression or recurrence of the disease in the future. Fifty-nine children with diagnosed early childhood caries (ECC) were recruited onto the study. The condition of the children's dentition was defined according to the World Health Organization guidelines. The participants were divided into children with initial enamel demineralization and children showing dentin damage...
November 14, 2017: Nutrients
https://www.readbyqxmd.com/read/29134404/curcumin-mediated-anti-microbial-photodynamic-therapy-against-candida-dubliniensis-biofilms
#18
Paula Volpato Sanitá, Ana Cláudia Pavarina, Lívia Nordi Dovigo, Ana Paula Dias Ribeiro, Mariana Carvalho Andrade, Ewerton Garcia de Oliveira Mima
The purpose of this study was to evaluate the effectiveness of anti-microbial photodynamic therapy (aPDT) mediated by curcumin (Cur) associated with LED light against biofilms of Candida dubliniensis, and further, investigate cellular uptake and drug penetration through the biofilms under confocal laser scanning microscopy (CLSM). Four C. dubliniensis strains were tested: three clinical isolates from HIV-positive patients and one reference strain (CBS 7987). Biofilms were treated with three Cur concentrations (20...
November 13, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29129902/quantification-of-fraglide-1-a-new-functional-ingredient-in-vinegars
#19
Aydan H Yatmaz, Tetsuaki Kinoshita, Akio Miyazato, Masahiro Takagi, Yoshio Tsujino, Fumiaki Beppu, Naohiro Gotoh
Vinegar is a widely used condiment in the world, and is produced from ethanol by acetic acid fermentation. Different fruits, vegetables, cereals, and wines can be used as ingredients for vinegar production. It is known that vinegar has many nutrient components such as organic acids, polyphenols, and aromatic compounds. Because of these bioactive components, it has many health benefits. China has a long history of producing vinegar and has been using it for health products and as medicine. Chinese aromatic Zhenjiang vinegar (Kozu) is produced from sticky rice...
November 13, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/29127020/does-the-use-of-antifungal-agents-in-agriculture-and-in-food-foster-polyene-resistance-development-a-reason-for-concern
#20
REVIEW
Axel Dalhoff
Environmental fungicides are used in agriculture to reduce fungal spoilage of crop to a minimum and the polyene macrolide natamycin is used as a food preservative. The use of natamycin in yoghurt has recently been authorized in the USA and some other countries. However, resistance development is a serious risk associated with the use of antimicrobials as food additives and environmental fungicides. Cross-resistance between agricultural and medical azoles and amphothericin B, respectively, not being used in agriculture has been demonstrated in clinical and environmental isolates...
November 7, 2017: Journal of Global Antimicrobial Resistance
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