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https://www.readbyqxmd.com/read/28440496/pu-1-serves-a-critical-role-in-the-innate-defense-against-aspergillus%C3%A2-fumigatus-via-dendritic-cell-associated-c-type-lectin-receptor-1-and-toll-like-receptors-2-and-4-in-thp-1-derived-macrophages
#1
Chenyang Liu, Min Wang, Wenkui Sun, Feng Cai, Shen Geng, Xin Su, Yi Shi
Aspergillus fumigatus (A. fumigatus) is one of the most common fungal pathogens of invasive pulmonary aspergillosis (IPA), which may be life threatening in immunocompromised individuals. The dendritic cell-associated C-type lectin receptor (Dectin-1), toll‑like receptor (TLR)-2 and TLR-4 are major pattern recognition receptors in alveolar macrophages that recognize A. fumigatus components. The PU.1 transcription factor is known to be important for the transcriptional control of these three receptors in mature macrophages...
April 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28431001/invasive-aspergillosis-in-patients-with-underlying-liver-cirrhosis-a-prospective-cohort-study
#2
Juergen Prattes, Martin Hoenigl, Robert Krause, Walter Buzina, Thomas Valentin, Frederike Reischies, Christoph Koidl, Ines Zollner-Schwetz
The aim of this study was to determine the prevalence of invasive aspergillosis (IA) in patients with liver cirrhosis and the performance of serum galactomannan (GM) screening. Patients with decompensated liver cirrhosis and patients with compensated liver cirrhosis presenting with fever and/or respiratory symptoms were prospectively enrolled. All patients were screened by serum GM twice weekly irrespective of clinical signs and symptoms. Positive serum GM triggered work-up consisting of chest computed tomography and in case of pathological findings bronchoscopy...
April 20, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28427940/characterization-of-the-rax1-gene-encoding-a-putative-regulator-of-g-protein-signaling-in-aspergillus-fumigatus
#3
Olumuyiwa Ayokunle Igbalajobi, Jae-Hyuk Yu, Kwang-Soo Shin
The filamentous fungus Aspergillus fumigatus is the major cause of life threatening invasive aspergillosis, and its small hydrophobic asexual spores (conidia) are the major infection agent. To better understand biology of A. fumigatus, we have characterized the rax1 gene encoding a putative regulator of G protein signaling (RGS). The deletion (Δ) of rax1 results in restricted colony growth and highly reduced number of conidia in A. fumigatus. Transcript levels of the three central activators of asexual development abaA, brlA, and wetA are significantly reduced in the Δrax1 mutant...
April 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28422065/detection-of-1-3-%C3%AE-d-glucan-for-the-diagnosis-of-invasive-fungal-infection-in-liver-transplant-recipients
#4
Eric Levesque, Fadi Rizk, Zaid Noorah, Nawel Aït-Ammar, Catherine Cordonnier-Jourdin, Sarra El Anbassi, Christine Bonnal, Daniel Azoulay, Jean-Claude Merle, Françoise Botterel
Invasive fungal infections (IFI) are complications after liver transplantation involving high morbidity and mortality. (1,3)-β-d-glucan (BG) is a biomarker for IFI, but its utility remains uncertain. This study was designed to evaluate the impact of BG following their diagnosis. Between January 2013 and May 2016, 271 liver transplants were performed in our institution. Serum samples were tested for BG (Fungitell(®), Associates Cape Code Inc., Falmouth, MA, USA) at least weekly between liver transplantation and the discharge of patients...
April 19, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28416540/in-vivo-efficacy-of-liposomal-amphotericin-b-against-wild-type-and-azole-resistant-aspergillus-fumigatus-isolates-in-two-different-immunosuppressed-models-of-invasive-aspergillosis
#5
Seyedmojtaba Seyedmousavi, Johan W Mouton, Willem J G Melchers, Paul E Verweij
Using an immunocompetent murine model of invasive aspergillosis (IA), we previously reported (AAC, 2013, 57, 4, 1866-1871) that the efficacy of liposomal amphotericin B (L-AmB) is not hampered by the presence of azole resistance mutations in Aspergillus fumigatus We here investigated the role of immune suppression, i.e. neutropenic and steroid-treated, on L-AmB efficacy in mice infected with a wild type (WT) and azole-resistant Aspergillus fumigatus harboring TR34/L98H mutation in cyp-51A gene.Survival of treated animals at day 14 in both immunosuppressed models was significantly better than that of non-treated controls...
April 17, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28409094/successful-treatment-of-azole-resistant-invasive-aspergillosis-in-a-bottlenose-dolphin-with-high-dose-posaconazole
#6
Paulien E Bunskoek, Seyedmojtaba Seyedmousavi, Steven J M Gans, Peter B J van Vierzen, Willem J G Melchers, Cornelis E van Elk, Johan W Mouton, Paul E Verweij
Invasive aspergillosis due to azole-resistant Aspergillus fumigatus is difficult to manage. We describe a case of azole-resistant invasive aspergillosis in a female bottlenose dolphin, who failed to respond to voriconazole and posaconazole therapy. As intravenous therapy was precluded, high dose posaconazole was initiated aimed at achieving trough levels exceeding 3 mg/l. Posaconazole serum levels of 3-9.5 mg/l were achieved without significant side-effects. Follow-up bronchoscopy and computed tomography showed complete resolution of the lesions...
June 2017: Medical Mycology Case Reports
https://www.readbyqxmd.com/read/28397466/absolute-eosinophil-count-was-significantly-associated-with-serum-1-3-%C3%AE-d-glucan-in-patients-with-invasive-fungal-infections
#7
Pengfei Zhu, Jun Lv, Yongkui Kong, Hui Xu, Liang Ming
BACKGROUND: Measurement of serum (1,3)-β-D-glucan has emerged as an important diagnostic strategy for invasive fungal infections (IFI). Previous studies suggested that the eosinophil count would be related with the value of serum (1,3)-β-D-glucan. METHODS: 572 blood samples obtained from 126 patients at the First Affiliated Hospital of Zhengzhou University were analyzed. The unsuitable samples were excluded according to the patient selection. RESULTS: In our study, we found that in the 572 cumulative results, the absolute eosinophil count was significantly associated with the value of (1,3)-β-D-glucan (r = 0...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28395406/-expression-and-differential-diagnostic-value-of-serum-microrna-for-invasive-pulmonary-aspergillosis
#8
Z N Wen, Z G Ling, Y Huang, X Li
Objective: To explore the expression and the clinical diagnostic value of serum miR-21 for invasive pulmonary aspergillosis (IPA). Methods: Outpatients and inpatients from the Fourth Affiliated Hospital of Guangxi Medical University were included in the study during June 2014 to September 2015. The IPA group had 40 patients, male 22, female 18, aged 55-68 years (mean 60 ), while the control groups included 50 patients with pulmonary tuberculosis [male 23, female 27, aged 50-62 years (mean 55 )], 50 patients with lung cancer [male 30, female 20, aged 55-70 years (mean 62)], and 50 healthy controls [male 25, female 25, aged 50-67 years (mean 60) ]...
April 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28389392/il-10-overexpression-predisposes-to-invasive-aspergillosis-by-suppressing-antifungal-immunity
#9
Cristina Cunha, Samuel M Gonçalves, Cláudio Duarte-Oliveira, Luís Leite, Katrien Lagrou, António Marques, Carmen B Lupiañez, Inês Mesquita, Joana Gaifem, Ana Margarida Barbosa, Carlos Pinho Vaz, Rosa Branca, Fernando Campilho, Fátima Freitas, Dário Ligeiro, Cornelia Lass-Flörl, Jürgen Löffler, Manuel Jurado, Margarida Saraiva, Oliver Kurzai, Fernando Rodrigues, António G Castro, Ricardo Silvestre, Juan Sainz, Johan A Maertens, Egídio Torrado, Ilse D Jacobsen, João F Lacerda, António Campos, Agostinho Carvalho
We show that the genetically-determined overexpression of IL-10 is a risk factor for invasive aspergillosis after stem-cell transplantation. Our results identify an IL-10-mediated mechanism that regulates the balance between anti- and proinflammatory antifungal immunity.
April 4, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28384860/fungal-opportunistic-pneumonias-in-hiv-aids-patients-an-indian-tertiary-care-experience
#10
Ravinder Kaur, Bhanu Mehra, Megh Singh Dhakad, Ritu Goyal, Preena Bhalla, Richa Dewan
INTRODUCTION: Opportunistic pneumonias are a major cause of mortality and morbidity in Human Immunodeficiency Virus (HIV) reactive patients. Despite the significant role that fungi play in causation of this opportunistic mycoses, very few Indian studies have attempted to investigate the burden and aetiological spectrum of HIV/AIDS-associated fungal pneumonias. AIM: To document the prevalence of fungal aetiology in HIV/AIDS-related opportunistic pneumonias in an Indian setting; and to elucidate the various fungal opportunists responsible for the same...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28384600/a-prospective-study-of-fungal-biomarkers-to-improve-management-of-invasive-fungal-diseases-in-a-mixed-specialty-critical-care-unit
#11
Alida Fe Talento, Katie Dunne, Eimear Ann Joyce, Michael Palmer, Elizabeth Johnson, P Lewis White, Jan Springer, Juergen Loeffler, Thomas Ryan, Daniel Collins, Thomas R Rogers
PURPOSE: The diagnosis of invasive fungal diseases (IFD) in critical care patients (CrCP) is difficult. The study investigated the performance of a set of biomarkers for diagnosis of IFD in a mixed specialty critical care unit (CrCU). METHODS: A prospective observational study in patients receiving critical care for ≥7days was performed. Serum samples were tested for the presence of: (1-3) - β-d-glucan (BDG), galactomannan (GM), and Aspergillus fumigatus DNA...
March 30, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28379569/one-health-pathogens-in-the-aspergillus-viridinutans-complex
#12
Jessica J Talbot, Vanessa R Barrs
Cryptic species in Aspergillus section Fumigati are increasingly recognised as pathogens in humans and animals. The A. viridinutans complex (AVC) has recently expanded to comprise 10 species, of which six are known to be pathogenic, including A. udagawae, A. felis, A. pseudofelis, A. parafelis, A. pseudoviridinutans, and A. wyomingensis. They cause locally invasive and disseminated invasive disease syndromes, including chronic pulmonary aspergillosis and invasive aspergillosis in humans, invasive fungal rhinosinusitis in cats, and disseminated invasive aspergillosis in dogs...
March 31, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28379304/changes-in-in-vitro-susceptibility-patterns-of-aspergillus-to-triazoles-and-correlation-with-aspergillosis-outcome-in-a-tertiary-care-cancer-center-1999-2015
#13
Sang Taek Heo, Alexander M Tatara, Cristina Jiménez-Ortigosa, Ying Jiang, Russell E Lewis, Jeffrey Tarrand, Frank Tverdek, Nathaniel D Albert, Paul E Verweij, Jacques F Meis, Antonios G Mikos, David S Perlin, Dimitrios P Kontoyiannis
Background.: Azole-resistant aspergillosis in high risk patients with hematological malignancy or hematopoietic stem cell transplantation (HSCT) is a cause of concern. Methods.: We examined changes over time in triazole MICs (CLSI method) of 290 sequential Aspergillus isolates recovered from respiratory sources from 1999-2002 (before introduction of the Aspergillus-potent triazoles voriconazole and posaconazole) and 2003-2015 at MD Anderson Cancer Center. We also tested for polymorphisms in ergosterol biosynthetic genes (cyp51A, erg3C, erg1) in the 37 A...
March 31, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28378982/early-diagnosis-and-treatment-of-invasive-aspergillosis-as-a-main-determinant-of-outcome-review-of-literature-according-to-the-presented-case-report
#14
Michał Borys, Paweł Piwowarczyk, Justyna Sysiak, Mirosław Czuczwar, Andrzej Prystupa
Although. Aspergillus spp infection is not the major cause of morbidity in Intensive Care Units (ICUs), mortality among patients treated for it is tremendous. Moreover, invasive aspergillosis (IA) is an independent risk factor of hospital costs and length of stay. The prevalence of this disease is inversely correlated with the immunocompetence of individuals; for instance, the incidence of IA among patients with leukemia is estimated as high as 12.7%. Although there is a significant improvement in the antifungal armamentarium, the appropriate treatment is still being given too late, mostly because of late diagnosis...
March 21, 2017: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/28377877/invasive-aspergillosis-related-to-ibrutinib-therapy-for-chronic-lymphocytic-leukemia
#15
Benjamin Arthurs, Kathy Wunderle, Maylee Hsu, Suil Kim
We report a case of invasive pulmonary aspergillosis in a patient taking ibrutinib, a Bruton's tyrosine kinase inhibitor used to treat refractory chronic lymphocytic leukemia. We hypothesize that ibrutinib promoted this infection by suppressing innate immune responses against Aspergillus. Clinicians should be aware of potential Aspergillus infections in patients treated with this drug.
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28355467/new-pharmacological-opportunities-for-the-treatment-of-invasive-mould-diseases
#16
Marie-Pierre Ledoux, Elise Toussaint, Julie Denis, Raoul Herbrecht
Recently, several randomized studies have been published that will shape treatment decisions in the prevention and management of invasive mould infections. Liposomal amphotericin B is an option for empirical or targeted treatment of invasive aspergillosis or mucormycosis, but for prophylaxis therapy, the triazole class now predominates. The triazole voriconazole is currently regarded as a drug of choice for the treatment of proven or probable invasive aspergillosis, and has shown significantly higher response rates than amphotericin B deoxycholate in this setting, with fewer severe drug-related adverse events...
March 1, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28355466/invasive-mould-infections-in-the-icu-setting-complexities-and-solutions
#17
Matteo Bassetti, Emilio Bouza
Infections caused by filamentous fungi represent a major burden in the ICU. Invasive aspergillosis is emerging in non-neutropenic individuals with predisposing conditions, e.g. corticosteroid treatment, chronic obstructive pulmonary disease, liver cirrhosis, solid organ cancer, HIV infection and transplantation. Diagnosis is challenging because the signs and symptoms are non-specific, and initiation of additional diagnostic examinations is often delayed because clinical suspicion is low. Isolation of an Aspergillus species from the respiratory tract in critically ill patients, and tests such as serum galactomannan, bronchoalveolar lavage 1-3-β-d-glucan and specific PCR should be interpreted with caution...
March 1, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28355464/early-diagnosis-of-invasive-mould-infections-and-disease
#18
Frédéric Lamoth, Thierry Calandra
Invasive mould infections (IMIs), such as invasive aspergillosis or mucormycosis, are a major cause of death in patients with haematological cancer and in patients receiving long-term immunosuppressive therapy. Early diagnosis and prompt initiation of antifungal therapy are crucial steps in the management of patients with IMI. The diagnosis of IMI remains a major challenge, with an increased spectrum of fungal pathogens and a diversity of clinical and radiological presentations within the expanding spectrum of immunocompromised hosts...
March 1, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28353473/invasive-aspergillosis-masquerading-as-a-lacrimal-sac-abscess
#19
Kristin E Hirabayashi, Evan Kalin-Hajdu, M Reza Vagefi, Robert C Kersten
No abstract text is available yet for this article.
March 28, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28353454/utility-of-the-aspergillus-galactomannan-antigen-testing-for-neutropenic-paediatric-patients
#20
Hafize Sav, Mustafa Altay Atalay, Ayse Nedret Koc, Ekrem Unal, Gonca Demir, Gokmen Zararsiz
Invasive aspergillosis (IA) is an increasingly important cause of morbidity and mortality particularly in paediatric patients. Early diagnosis and the initiation of efficacious antifungal treatments could affect the prognosis of these patients. The aim of this study was to determine the clinical contribution of Galactomannan (GM) screening in paediatric patients. We reviewed the records of all in-patients, and followed up, in the various units at the Medical Faculty Children's Hospital of Erciyes University (Kayseri, Turkey), those who had at least one GM assay result from August 2009 to April 2012...
March 1, 2017: Le Infezioni in Medicina
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