151
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Arancia S, Sandini S, De Bernardis F, Fortini D. Rapid, simple, and low-cost identification of Candida species using high-resolution melting analysis. Diagn Microbiol Infect Dis 2011; 69:283-5. [DOI: 10.1016/j.diagmicrobio.2010.10.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Revised: 09/29/2010] [Accepted: 10/05/2010] [Indexed: 11/28/2022]
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152
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Lyseng-Williamson KA. Posaconazole: a pharmacoeconomic review of its use in the prophylaxis of invasive fungal disease in immunocompromised hosts. PHARMACOECONOMICS 2011; 29:251-268. [PMID: 21309616 DOI: 10.2165/11206800-000000000-00000] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Posaconazole (Noxafil®) is an oral, second-generation, extended-spectrum triazole whose approved indications include prophylaxis of invasive fungal disease (IFD) in immunocompromised patients. In pivotal head-to-head trials, posaconazole was significantly more effective in preventing IFD than standard azole therapy (i.e. oral fluconazole or itraconazole) in chemotherapy-induced neutropenic patients with acute myelogenous leukaemia (AML) or myelodysplastic syndromes (MDS) and was noninferior to treatment with fluconazole in patients with graft-versus-host disease (GVHD) who were receiving intensive immunosuppressive therapy following haematopoietic stem cell transplantation. In both indications, prophylactic posaconazole was associated with significantly lower rates of IFD-related mortality. The overall tolerability profile of posaconazole was generally similar to that of the other prophylactic treatments. The large body of modelled cost-effectiveness analyses from a healthcare payer perspective on the use of prophylactic posaconazole suggest that it is a dominant or cost-effective option relative to prophylaxis with standard azole therapy in neutropenic patients with AML/MDS, and fluconazole in patients with GVHD. Based on clinical trial data in these patient groups, antifungal prophylaxis with posaconazole was predicted to be a dominant or cost-effective option relative to prophylaxis with standard oral azoles, with regard to the incremental cost per QALY gained, life-year (LY) gained and/or other outcomes in cost-effectiveness analyses in numerous countries. In those analyses in which posaconazole did not dominate the comparator, posaconazole was considered cost effective, as the incremental cost per QALY or LY gained with posaconazole was lower than assumed willingness-to-pay thresholds. Sensitivity analyses consistently demonstrated that these results were robust to plausible changes in key model assumptions. In conclusion, prophylactic treatment with posaconazole is clinically effective in preventing IFD in neutropenic patients with AML/MDS and patients with GVHD. Available pharmacoeconomic data from several countries, despite some inherent limitations, support the use of posaconazole as a dominant or cost-effective prophylactic antifungal treatment relative to prophylaxis with standard oral azoles in these patient populations at high risk of developing IFD.
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153
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Azoulay E. What Has Been Learned from Postmortem Studies? PULMONARY INVOLVEMENT IN PATIENTS WITH HEMATOLOGICAL MALIGNANCIES 2011. [PMCID: PMC7123032 DOI: 10.1007/978-3-642-15742-4_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Infectious and noninfectious pulmonary diseases are commonly found on postmortem autopsy studies in patients with hematological malignancy. Despite the technological advances in diagnostic testing and imaging modalities, obtaining an accurate clinical diagnosis remains difficult and often not possible until autopsy. Major diagnostic discrepancies between clinical premortem diagnoses and postmortem autopsy findings have been reported in these patients. The most common missed diagnoses are due to opportunistic infections and cardiopulmonary complications. These findings underscore the importance of enhanced surveillance, monitoring and treatment of infections and cardiopulmonary disorders in these patients. Autopsies remain important in determining an accurate cause of death and for improved understanding of diagnostic deficiencies, as well as for medical education and quality assurance.
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Affiliation(s)
- Elie Azoulay
- Service de Réanimation Médicale, Hôpital Saint Louis, Avenue Claude Vellefaux 1, Paris, 75010 France
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154
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de Naurois J, Novitzky-Basso I, Gill MJ, Marti FM, Cullen MH, Roila F. Management of febrile neutropenia: ESMO Clinical Practice Guidelines. Ann Oncol 2010; 21 Suppl 5:v252-6. [PMID: 20555092 DOI: 10.1093/annonc/mdq196] [Citation(s) in RCA: 243] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- J de Naurois
- Department of Medical Oncology, University Hospital Birmingham NHS Foundation Trust, UK
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155
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Putignani L, Del Chierico F, Onori M, Mancinelli L, Argentieri M, Bernaschi P, Coltella L, Lucignano B, Pansani L, Ranno S, Russo C, Urbani A, Federici G, Menichella D. MALDI-TOF mass spectrometry proteomic phenotyping of clinically relevant fungi. MOLECULAR BIOSYSTEMS 2010; 7:620-9. [PMID: 20967323 DOI: 10.1039/c0mb00138d] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Proteomics is particularly suitable for characterising human pathogens with high life cycle complexity, such as fungi. Protein content and expression levels may be affected by growth states and life cycle morphs and correlate to species and strain variation. Identification and typing of fungi by conventional methods are often difficult, time-consuming and frequently, for unusual species, inconclusive. Proteomic phenotypes from MALDI-TOF MS were employed as analytical and typing expression profiling of yeast, yeast-like species and strain variants in order to achieve a microbial proteomics population study. Spectra from 303 clinical isolates were generated and processed by standard pattern matching with a MALDI-TOF Biotyper (MT). Identifications (IDs) were compared to a reference biochemical-based system (Vitek-2) and, when discordant, MT IDs were verified with genotyping IDs, obtained by sequencing the 25-28S rRNA hypervariable D2 region. Spectra were converted into virtual gel-like formats, and hierarchical clustering analysis was performed for 274 Candida profiles to investigate species and strain typing correlation. MT provided 257/303 IDs consistent with Vitek-2 ones. However, amongst 26/303 discordant MT IDs, only 5 appeared "true". No MT identification was achieved for 20/303 isolates for incompleteness of database species variants. Candida spectra clustering agreed with identified species and topology of Candida albicans and Candida parapsilosis specific dendrograms. MT IDs show a high analytical performance and profiling heterogeneity which seems to complement or even outclass existing typing tools. This variability reflects the high biological complexity of yeasts and may be properly exploited to provide epidemiological tracing and infection dispersion patterns.
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Affiliation(s)
- Lorenza Putignani
- Microbiology Unit, Children's Hospital and Research Institute Bambino Gesù, Piazza Sant'Onofrio 4, 00165, Rome, Italy.
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156
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Cornely OA, Maertens J, Bresnik M, Ebrahimi R, Dellow E, Herbrecht R, Donnelly JP. Efficacy outcomes in a randomised trial of liposomal amphotericin B based on revised EORTC/MSG 2008 definitions of invasive mould disease. Mycoses 2010; 54:e449-55. [PMID: 21039936 DOI: 10.1111/j.1439-0507.2010.01947.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In 2008, the European Organisation for Research and Treatment of Cancer/Mycoses Study Group (EORTC/MSG) published revised definitions for diagnosing invasive fungal disease. A previous prospective trial of liposomal amphotericin B for invasive mould disease (AmBiLoad) used modified EORTC/MSG 2002 criteria. We wished to re-evaluate the response and survival based on the revised definitions to compare the outcomes of early vs. late treatment. Patients who had received an allogeneic haematopoietic stem cell transplant or who were neutropaenic (absolute neutrophil count <500 μl(-1) within 14 days of study entry) had been recruited on the basis of a halo or air crescent sign on chest computerised tomography. Originally classified as probable invasive mould disease, they were categorised as possible invasive mould disease using 2008 criteria. Patients had received liposomal amphotericin B at either 3 or 10 mg kg(-1) QD for 14 days, followed by 3 mg kg(-1) QD. Response at end of treatment and the 12-week survival were re-calculated according to 2008 definitions. Six-week survival was estimated by Kaplan-Meier analysis. Of 201 patients with invasive mould disease, 118 (59%) had a diagnosis based on halo signs (possible cases). Mycological evidence was present in 83 (41%) cases (probable/proven cases). Survival rates at 12 weeks for possible vs. probable/proven cases in the 3 mg kg(-1) QD group were 82% vs. 58% (P = 0.006), and 65% vs. 50% (P = 0.15) in the 10 mg kg(-1) QD group. At 6 weeks, rates were 87% vs. 69% in the 3 mg kg(-1) QD group (P = 0.009), and 75% vs. 61% in the 10 mg kg(-1) QD group (P = 0.01). Patients with possible invasive mould disease based on EORTC/MSG 2008 criteria had improved survival rates compared with those treated for probable/proven invasive mould disease. As possible invasive mould disease probably reflects an early-stage of disease, a better outcome might be expected when treatment with liposomal amphotericin B is started preemptively.
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Affiliation(s)
- Oliver A Cornely
- Department I of Internal Medicine, Infectious Diseases, University of Cologne, Cologne, Germany.
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157
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Paniagua Martin M, Marzoa Rivas R, Barge Caballero E, Grille Cancela Z, Fernandez C, Solla M, Pedrosa V, Rodriguez Fernandez J, Herrera J, Castro-Beiras A, Crespo-Leiro M. Efficacy and Tolerance of Different Types of Prophylaxis for Prevention of Early Aspergillosis After Heart Transplantation. Transplant Proc 2010; 42:3014-6. [DOI: 10.1016/j.transproceed.2010.08.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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158
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Kuroyanagi JI, Kanai K, Sugimoto Y, Horiuchi T, Achiwa I, Takeshita H, Kawakami K. 1,3-Benzoxazole-4-carbonitrile as a novel antifungal scaffold of β-1,6-glucan synthesis inhibitors. Bioorg Med Chem 2010; 18:7593-606. [PMID: 20875745 DOI: 10.1016/j.bmc.2010.08.044] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Revised: 08/21/2010] [Accepted: 08/24/2010] [Indexed: 10/19/2022]
Abstract
Synthesis and in vitro antifungal evaluations of 1,3-benzoxazole-7-carbonitrile 3, 1,3-benzoxazole-4-carbonitrile 4, benzofuran 5, benzoxazine 7, and benzimidazole 8 were reported. Among them, 1,3-benzoxazole-4-carbonitrile was found to be a superior scaffold structure with moderate growth inhibition against Candida species. 1,3-Benzoxazole-4-carbonitrile 6 showed potent activity against Candida species compared to 5-desmethyl compound 4 and triazolopyridine 2. Compound 6 was efficiently prepared from versatile intermediate 24, which possessed six different substituents on the benzene ring. Conversion of benzene 24 into various 1,3-benzoxazole derivatives such as 2-aliphatic 34, 2-amino 35, and lactone 38 was demonstrated.
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Affiliation(s)
- Jun-ichi Kuroyanagi
- Lead Discovery & Optimization Research Laboratories II, Daiichi Sankyo Co., Ltd, 1-16-13 Kitakasai, Edogawa-ku, Tokyo 134-8630, Japan.
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159
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Asif AR, Oellerich M, Amstrong VW, Gross U, Reichard U. Analysis of the cellular Aspergillus fumigatus proteome that reacts with sera from rabbits developing an acquired immunity after experimental aspergillosis. Electrophoresis 2010; 31:1947-58. [PMID: 20564691 DOI: 10.1002/elps.201000015] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Invasive aspergillosis caused by the mould Aspergillus fumigatus is a life-threatening lung or systemic infection in the immunocompromised host. In this study, a protective immune response against the disease was achieved in two infected rabbits, and the cellular fungal antigenic proteome that mediated such a response was investigated against the background of vaccine development efforts. Altogether, 59 different Aspergillus proteins were found becoming reactive in the course of the developing immunity, many of which are described in this context for the first time. These included proteins related to oxidative stress management, glycolysis and other metabolic pathways. As oxidative stress is suspected to be one of the major defense mechanisms, the results may indicate at least in part a continuous response of the pathogen to evade the host's immune system. In addition, proteins with suspected cell surface association or crucial function for fungal cell development were identified. As these antigens are newly recognized during the process of the developing immunoprotection, they may not only represent valuable infection markers but also importantly broaden the list of possible vaccine candidates.
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Affiliation(s)
- Abdul R Asif
- Department of Clinical Chemistry, University Medical Center Goettingen, Goettingen, Germany.
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160
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Kuroyanagi JI, Kanai K, Sugimoto Y, Fujisawa T, Morita C, Suzuki T, Kawakami K, Takemura M. Novel antifungal agents: Triazolopyridines as inhibitors of β-1,6-glucan synthesis. Bioorg Med Chem 2010; 18:5845-54. [DOI: 10.1016/j.bmc.2010.06.096] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2010] [Revised: 06/28/2010] [Accepted: 06/29/2010] [Indexed: 11/26/2022]
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161
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Evaluation of lysine biosynthesis as an antifungal drug target: biochemical characterization of Aspergillus fumigatus homocitrate synthase and virulence studies. EUKARYOTIC CELL 2010; 9:878-93. [PMID: 20363898 DOI: 10.1128/ec.00020-10] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Aspergillus fumigatus is the main cause of severe invasive aspergillosis. To combat this life-threatening infection, only limited numbers of antifungals are available. The fungal alpha-aminoadipate pathway, which is essential for lysine biosynthesis, has been suggested as a potential antifungal drug target. Here we reanalyzed the role of this pathway for establishment of invasive aspergillosis in murine models. We selected the first pathway-specific enzyme, homocitrate synthase (HcsA), for biochemical characterization and for study of its role in virulence. A. fumigatus HcsA was specific for the substrates acetyl-coenzyme A (acetyl-CoA) and alpha-ketoglutarate, and its activity was independent of any metal ions. In contrast to the case for other homocitrate synthases, enzymatic activity was hardly affected by lysine and gene expression increased under conditions of lysine supplementation. An hcsA deletion mutant was lysine auxotrophic and unable to germinate on unhydrolyzed proteins given as a sole nutrient source. However, the addition of partially purified A. fumigatus proteases restored growth, confirming the importance of free lysine to complement auxotrophy. In contrast to lysine-auxotrophic mutants from other fungal species, the mutant grew on blood and serum, indicating the existence of high-affinity lysine uptake systems. In agreement, although the virulence of the mutant was strongly attenuated in murine models of bronchopulmonary aspergillosis, virulence was partially restored by lysine supplementation via the drinking water. Additionally, in contrast to the case for attenuated pulmonary infections, the mutant retained full virulence when injected intravenously. Therefore, we concluded that inhibition of fungal lysine biosynthesis, at least for disseminating invasive aspergillosis, does not appear to provide a suitable target for new antifungals.
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162
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Rüping MJGT, Vehreschild JJ, Cornely OA. Primary antifungal prophylaxis in acute myeloblastic leukemia and myelodysplastic syndrome--still an open question? Leuk Lymphoma 2010; 51:20-6. [PMID: 20017598 DOI: 10.3109/10428190903242602] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In this review, we aim to compare different early treatment strategies of invasive fungal diseases in patients undergoing induction chemotherapy for acute myelogenous leukemia or myelodysplastic syndrome. Three treatment approaches--prophylactic, empiric, and preemptive treatment--are subject to continuous discussion among physicians treating patients at risk. Considering the available clinical basis of evidence, we opt for antifungal prophylaxis with posaconazole 200 mg tid po as our primary prophylactic strategy, while the employment of preemptive treatment should be delayed until more accurate diagnostic tools become available. In addition to antifungal prophylaxis, empiric treatment with caspofungin or L-AmB may be administered to patients with fever resistant to broad-spectrum antibiotic treatment and without radiographic findings typical of invasive fungal disease.
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Affiliation(s)
- Maria J G T Rüping
- Department I of Internal Medicine, Clinical Trials Unit II for Infectious Diseases, Hospital of the University of Cologne, Köln, Germany
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163
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Ruiz-Camps I, Aguado JM, Almirante B, Bouza E, Ferrer Barbera C, Len O, López-Cerero L, Rodríguez-Tudela JL, Ruiz M, Solé A, Vallejo C, Vázquez L, Zaragoza R, Cuenca-Estrella M. Recomendaciones sobre la prevención de la infección fúngica invasora por hongos filamentosos de la Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica (SEIMC). Enferm Infecc Microbiol Clin 2010; 28:172.e1-172.e21. [DOI: 10.1016/j.eimc.2009.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Accepted: 11/24/2009] [Indexed: 11/30/2022]
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164
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Myrianthefs P, Markantonis SL, Evaggelopoulou P, Despotelis S, Evodia E, Panidis D, Baltopoulos G. Monitoring plasma voriconazole levels following intravenous administration in critically ill patients: an observational study. Int J Antimicrob Agents 2010; 35:468-72. [PMID: 20188523 DOI: 10.1016/j.ijantimicag.2009.12.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Revised: 12/20/2009] [Accepted: 12/23/2009] [Indexed: 12/13/2022]
Abstract
Data relating to the pharmacokinetics of voriconazole in critically ill patients are lacking. A prospective observational study was conducted on 18 non-consecutive critically ill patients aged 24-97 years, comprising 12 patients with normal renal function (NRF) [creatinine clearance (CL(Cr)) > or = 60 mL/min] and 6 patients with moderate renal impairment (MRI) (CL(Cr) 40-55 mL/min), administered voriconazole intravenously (6 mg/kg loading dose and 3-4 mg/kg twice daily thereafter) in order to determine the suitability of these doses in this patient population. Steady-state blood levels were monitored and liver and renal function were recorded throughout treatment. Large variability in patient plasma levels was observed, ranging from 37% at < or = 1 mg/L (minimum inhibitory concentration at which, for most fungal pathogens, 90% of isolates are susceptible) to 19% at >5.5mg/L. Moreover, maintaining trough concentrations above clinical breakpoints was not consistently achieved because 16/30 (53%) were < or = 1 mg/L. In a few MRI patients, average concentrations were found to be significantly different compared with those of NRF patients administered the same dose, however this difference was not noted in pharmacokinetic parameters following dose normalisation. None of the patients experienced deterioration in renal or liver function. Recommended voriconazole doses are inadequate to achieve drug concentrations >1 microg/mL over the entire dosing interval in some critically ill patients.
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Affiliation(s)
- Pavlos Myrianthefs
- Intensive Care Unit, KAT Hospital, School of Nursing, Athens University, Athens 157.71, Greece
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165
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Current world literature. Curr Opin Oncol 2010; 22:155-61. [PMID: 20147786 DOI: 10.1097/cco.0b013e32833681df] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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166
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Tolkoff-Rubin NE, Rubin RH. Infection in solid organ transplantation. Infect Dis (Lond) 2010. [DOI: 10.1016/b978-0-323-04579-7.00075-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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167
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Del Poeta M. Fungi are Not All "Fun-Guys" after All. Front Microbiol 2010; 1:105. [PMID: 21687719 PMCID: PMC3109610 DOI: 10.3389/fmicb.2010.00105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Accepted: 08/06/2010] [Indexed: 01/28/2023] Open
Affiliation(s)
- Maurizio Del Poeta
- Departments of Biochemistry and Molecular Biology, Microbiology and Immunology, and Craniofacial Biology, and Division of Infectious Diseases, Medical University of South Carolina Charleston, SC, USA
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168
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Abstract
PURPOSE OF REVIEW The present review updates treatment of neutropenia from articles published from January 2008 through April 2009. RECENT FINDINGS Chemotherapy-induced neutropenia occurs most commonly in the first cycle of treatment. Older patients, patients with multiple comorbidities, and those receiving more myelotoxic drugs are prone to develop neutropenia and its complications. Current guidelines recommend the prophylactic use of the myeloid growth factors for the first cycle of chemotherapy for patients with more than a 20% risk of febrile neutropenia. Meta analysis from randomized trials shows that granulocyte colony-stimulating factor prophylaxis is associated with patients receiving more intensive chemotherapy, having better survival, but also having a higher risk of secondary acute myeloid leukemia. Antibiotics are standard treatment of febrile neutropenia and are increasingly used for prophylaxis in 'low-risk' patients. SUMMARY The myeloid growth factor granulocyte colony-stimulating factor has radically changed our approach to the prevention of febrile neutropenia. Antibiotics remain the mainstay of treatment of febrile neutropenia.
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169
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Drug interactions and adverse events associated with antimycotic drugs used for invasive aspergillosis in hematopoietic SCT. Bone Marrow Transplant 2009; 45:1197-203. [PMID: 19946342 DOI: 10.1038/bmt.2009.325] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The aim of this study was to assess the frequency of potential drug-drug interactions (pDDIs) and adverse drug events (ADEs) associated with antimycotics in hospitalized patients with hematopoietic SCT (HSCT). Of the 120 HSCT recipients evaluated, 36 received antimycotics. A total of 124 ADEs were recorded in 32 of the 36 patients treated, with 54 ADEs being possibly and 9 probably related to antimycotics. Of the treatments with amphotericin B, 93% were associated with one or more possible and 36% with probable ADEs. The corresponding figures for lipid-based amphotericin B were 100% and 7%, for voriconazole 68% and 11% and for caspofungin 70% and 0%. A total of 57 potentially severe DDIs associated with antimycotics were detected in 31 of the 36 patients. Of these, 14 DDIs were a possible cause of an ADE and 5 (4 times a combination of voriconazole with CYA and once a combination of CYA with conventional amphotericin B) were probably related. Although the prevalence of pDDIs and ADEs is high in HSCT patients, ADEs related with a high probability to treatment with antimycotics are rare. Regarding the high prevalence of pDDIs, our findings underscore the importance of close monitoring of laboratory and clinical parameters, as well as dose adjustment for critical drugs, in patients with HSCT.
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170
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Schütte M, Thullier P, Pelat T, Wezler X, Rosenstock P, Hinz D, Kirsch MI, Hasenberg M, Frank R, Schirrmann T, Gunzer M, Hust M, Dübel S. Identification of a putative Crf splice variant and generation of recombinant antibodies for the specific detection of Aspergillus fumigatus. PLoS One 2009; 4:e6625. [PMID: 19675673 PMCID: PMC2721682 DOI: 10.1371/journal.pone.0006625] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2009] [Accepted: 07/02/2009] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Aspergillus fumigatus is a common airborne fungal pathogen for humans. It frequently causes an invasive aspergillosis (IA) in immunocompromised patients with poor prognosis. Potent antifungal drugs are very expensive and cause serious adverse effects. Their correct application requires an early and specific diagnosis of IA, which is still not properly achievable. This work aims to a specific detection of A. fumigatus by immunofluorescence and the generation of recombinant antibodies for the detection of A. fumigatus by ELISA. RESULTS The A. fumigatus antigen Crf2 was isolated from a human patient with proven IA. It is a novel variant of a group of surface proteins (Crf1, Asp f9, Asp f16) which belong to the glycosylhydrolase family. Single chain fragment variables (scFvs) were obtained by phage display from a human naive antibody gene library and an immune antibody gene library generated from a macaque immunized with recombinant Crf2. Two different selection strategies were performed and shown to influence the selection of scFvs recognizing the Crf2 antigen in its native conformation. Using these antibodies, Crf2 was localized in growing hyphae of A. fumigatus but not in spores. In addition, the antibodies allowed differentiation between A. fumigatus and related Aspergillus species or Candida albicans by immunofluorescence microscopy. The scFv antibody clones were further characterized for their affinity, the nature of their epitope, their serum stability and their detection limit of Crf2 in human serum. CONCLUSION Crf2 and the corresponding recombinant antibodies offer a novel approach for the early diagnostics of IA caused by A. fumigatus.
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Affiliation(s)
- Mark Schütte
- Technische Universität Braunschweig, Institut für Biochemie und Biotechnologie, Braunschweig, Germany
| | - Philippe Thullier
- Groupe de biotechnologie des anticorps, Département de biologie des agents transmissibles, Centre de Recherche du Service de Santé des Armées, La Tronche, France
| | - Thibaut Pelat
- Groupe de biotechnologie des anticorps, Département de biologie des agents transmissibles, Centre de Recherche du Service de Santé des Armées, La Tronche, France
| | - Xenia Wezler
- Technische Universität Braunschweig, Institut für Biochemie und Biotechnologie, Braunschweig, Germany
| | - Philip Rosenstock
- Technische Universität Braunschweig, Institut für Biochemie und Biotechnologie, Braunschweig, Germany
| | - Dominik Hinz
- Technische Universität Braunschweig, Institut für Biochemie und Biotechnologie, Braunschweig, Germany
| | - Martina Inga Kirsch
- Technische Universität Braunschweig, Institut für Biochemie und Biotechnologie, Braunschweig, Germany
| | - Mike Hasenberg
- Institute of Molecular and Clinical Immunology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Ronald Frank
- Helmholtz-Centre for Infection Research, Braunschweig, Germany
| | - Thomas Schirrmann
- Technische Universität Braunschweig, Institut für Biochemie und Biotechnologie, Braunschweig, Germany
| | - Matthias Gunzer
- Institute of Molecular and Clinical Immunology, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Michael Hust
- Technische Universität Braunschweig, Institut für Biochemie und Biotechnologie, Braunschweig, Germany
| | - Stefan Dübel
- Technische Universität Braunschweig, Institut für Biochemie und Biotechnologie, Braunschweig, Germany
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171
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Krueger KP, Nelson AC. Economic considerations in the treatment of invasive aspergillosis: a review of voriconazole pharmacoeconomic studies. CLINICOECONOMICS AND OUTCOMES RESEARCH 2009; 1:35-43. [PMID: 21935305 PMCID: PMC3169992 DOI: 10.2147/ceor.s4244] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Indexed: 11/23/2022] Open
Abstract
Invasive aspergillosis is a life-threatening fungal infection predominately affecting immunocompromised individuals. The incidence of inpatient-treated aspergillosis cases in the US is estimated to be between 3.02 and 3.80 per 10,000 hospitalized patients. The estimated difference in hospital costs of patients with an aspergillosis infection is US$36,867 to US$59,356 higher than those of patients without the infection. Voriconazole is a synthetic, broad spectrum triazole antifungal agent, with FDA-approved indications for the treatment of invasive aspergillosis, esophageal candidiasis, candidemia in nonneutropenic patients, invasive candidiasis, and infections due to Scedosporium apiospermum and Fusarium species in patients refractory to or intolerant of other therapy. Eight cost-effectiveness analyses, one cost-minimization analysis, and one cost analysis were identified from a Medline search. The 10 pharmacoeconomic analyses were conducted in six different countries comparing voriconazole to conventional amphotericin B, liposomal amphotericin B, itraconazole, and caspofungin. All the cost-effectiveness and cost-minimization analyses identified voriconazole as the most cost-effective therapy. The cost analysis demonstrated voriconazole cost-savings. While the acquisition costs of voriconazole are higher than those of conventional amphotericin B, the toxicity profile and rate of treatment success associated with voriconazole result in lower total treatment costs per successfully treated patient.
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Affiliation(s)
- Kem P Krueger
- School of Pharmacy, University of Wyoming, Laramie, WY, USA
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Yu OHY, Keet AWW, Sheppard DC, Brewer T. Articular aspergillosis: case report and review of the literature. Int J Infect Dis 2009; 14:e433-5. [PMID: 19656708 DOI: 10.1016/j.ijid.2009.05.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 05/01/2009] [Accepted: 05/24/2009] [Indexed: 11/25/2022] Open
Abstract
The incidence of invasive aspergillosis is increasing due to more frequent use of immunosuppressant agents in patients with autoimmune diseases, hematological malignancies, and solid organ and hematopoietic stem cell transplants. Invasive aspergillosis most commonly affects the lungs, sinuses, and brain. Aspergillosis affecting the musculoskeletal system is rare. We describe here a case of articular aspergillosis in a febrile neutropenic patient successfully treated with voriconazole and caspofungin, and briefly review the 10 cases of articular aspergillosis that have previously been described in the literature.
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Affiliation(s)
- Oriana Hoi Yun Yu
- Department of Internal Medicine, Jewish General Hospital, McGill University, 3755 Cote St. Catherine Road, Montreal, Quebec, Canada H3T 1E2.
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Ruiz-Camps I, Cuenca-Estrella M. Antifúngicos para uso sistémico. Enferm Infecc Microbiol Clin 2009; 27:353-62. [DOI: 10.1016/j.eimc.2009.04.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2009] [Accepted: 04/27/2009] [Indexed: 01/10/2023]
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Moen MD, Lyseng-Williamson KA, Scott LJ. Liposomal amphotericin B: a review of its use as empirical therapy in febrile neutropenia and in the treatment of invasive fungal infections. Drugs 2009; 69:361-92. [PMID: 19275278 DOI: 10.2165/00003495-200969030-00010] [Citation(s) in RCA: 222] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Liposomal amphotericin B (AmBisome) is a lipid-associated formulation of the broad-spectrum polyene antifungal agent amphotericin B. It is active against clinically relevant yeasts and moulds, including Candida spp., Aspergillus spp. and filamentous moulds such as Zygomycetes, and is approved for the treatment of invasive fungal infections in many countries worldwide. It was developed to improve the tolerability profile of amphotericin B deoxycholate, which was for many decades considered the gold standard of antifungal treatment, despite being associated with infusion-related events and nephrotoxicity. In well controlled trials, liposomal amphotericin B had similar efficacy to amphotericin B deoxycholate and amphotericin B lipid complex as empirical therapy in adult and paediatric patients with febrile neutropenia. In addition, caspofungin was noninferior to liposomal amphotericin B as empirical therapy in adult patients with febrile neutropenia. For the treatment of confirmed invasive fungal infections, liposomal amphotericin B was more effective than amphotericin B deoxycholate treatment in patients with disseminated histoplasmosis and AIDS, and was noninferior to amphotericin B deoxycholate in patients with acute cryptococcal meningitis and AIDS. In adults, micafungin was shown to be noninferior to liposomal amphotericin B for the treatment of candidaemia and invasive candidiasis. Data from animal studies suggested that higher dosages of liposomal amphotericin B might improve efficacy; however, in the AmBiLoad trial in patients with invasive mould infection, there was no statistical difference in efficacy between the standard dosage of liposomal amphotericin B 3 mg/kg/day and a higher 10 mg/kg/day dosage, although the standard dosage was better tolerated. Despite being associated with fewer infusion-related adverse events and less nephrotoxicity than amphotericin B deoxycholate and amphotericin B lipid complex, liposomal amphotericin B use is still limited to some extent by these adverse events. Both echinocandins were better tolerated than liposomal amphotericin B. The cost of liposomal amphotericin B therapy may also restrict its use, but further pharmacoeconomic studies are required to fully define its cost effectiveness compared with other antifungal agents. Based on comparative data from well controlled trials, extensive clinical experience and its broad spectrum of activity, liposomal amphotericin B remains a first-line option for empirical therapy in patients with febrile neutropenia and in those with disseminated histoplasmosis, and is an option for the treatment of AIDS-associated cryptococcal meningitis, and for invasive Candida spp. or Aspergillus spp. infections. Amphotericin B, a macrocyclic, polyene antifungal agent, is thought to act by binding to ergosterol, the principal sterol in fungal cell membranes and Leishmania cells. This results in a change in membrane permeability, causing metabolic disturbance, leakage of small molecules and, as a consequence, cell death. In vitro and in vivo studies have shown that liposomal amphotericin B remains closely associated with the liposomes in the circulation, thereby reducing the potential for nephrotoxicity and infusion-related toxicity associated with conventional amphotericin B. Amphotericin B shows very good in vitro activity against a broad spectrum of clinically relevant fungal isolates, including most strains of Candida spp. and Aspergillus spp., and other filamentous fungi such as Zygomycetes. Liposomal amphotericin B has proven effective in various animal models of fungal infections, including those for candidiasis, aspergillosis, fusariosis and zygomycosis. Liposomal amphotericin B also shows immunomodulatory effects, although the mechanisms involved are not fully understood, and differ from those of amphotericin B deoxycholate and amphotericin B colloidal dispersion. In adult patients with febrile neutropenia, intravenous liposomal amphotericin B has nonlinear pharmacokinetics, with higher than dose-proportional increases in exposure being consistent with reticuloendothelial saturation and redistribution of amphotericin B in the plasma compartment. Liposomal amphotericin B is rapidly and extensively distributed after single and multiple doses, with steady-state concentrations of amphotericin B attained within 4 days and no clinically relevant accumulation of the drug following multiple doses of 1-7.5 mg/kg/day. In autopsy tissue, the highest concentrations of the drug were found in the liver and spleen, followed by the kidney, lung, myocardium and brain tissue. Elimination of liposomal amphotericin B, like that of amphotericin B deoxycholate, is poorly understood; its route of metabolism is not known and its excretion has not been studied. The terminal elimination half-life is about 7 hours. No dosage adjustment is required based on age or renal impairment. In several randomized, double-blind trials (n = 73-1095) in adult and/or paediatric patients, liposomal amphotericin B was effective as empirical therapy or as treatment for confirmed invasive fungal infections, including invasive candidiasis, candidaemia, invasive mould infection (mainly aspergillosis), histoplasmosis and cryptococcal meningitis. All agents were administered as an intravenous infusion; the typical dosage for liposomal amphotericin B was 3 mg/kg/day. Treatment was generally given for 1-2 weeks. Participants in trials evaluating empirical therapy had neutropenia and a persistent fever despite antibacterial treatment and had received chemotherapy or undergone haematopoietic stem cell transplantation. As empirical therapy in adult and paediatric patients, liposomal amphotericin B appeared to be as effective as amphotericin B deoxycholate (approximately 50% of patients in each group achieved treatment success) or amphotericin B lipid complex (approximately 40% of liposomal amphotericin B recipients experienced treatment success). Of note, in the first trial, results of the statistical test to determine equivalence between treatments were not reported. In the second trial, efficacy was assessed as an 'other' endpoint. In another trial, caspofungin was shown to be noninferior to liposomal amphotericin B, with approximately one-third of patients in each group experiencing treatment success. Liposomal amphotericin B was significantly more effective than amphotericin B deoxycholate for the treatment of moderate to severe disseminated histoplasmosis in patients with AIDS, with 88% and 64% of patients, respectively, having a successful response. Liposomal amphotericin B was noninferior to amphotericin B deoxycholate for the treatment of cryptococcal meningitis in terms of mycological success. Micafungin therapy was shown to be noninferior to liposomal amphotericin B for the treatment of adult patients with candidaemia or invasive candidiasis. In a substudy in paediatric patients, which was not powered to determine noninferiority, liposomal amphotericin B was as effective as micafungin for the treatment of candidaemia or invasive candidiasis. In this patient population, within each trial, 90% of adult patients and approximately three-quarters of paediatric patients in both treatment groups experienced a successful response. In patients with invasive mould infection (mainly aspergillosis), there was no difference in efficacy between a higher dosage of liposomal amphotericin B (10 mg/kg/day) and the standard dosage (3 mg/kg/day), with 46% and 50% of patients experiencing a favourable overall response. In well designed clinical trials, liposomal amphotericin B was generally at least as well tolerated as other lipid-associated formulations of amphotericin B and better tolerated than amphotericin B deoxycholate in adult and paediatric patients. Compared with other amphotericin B formulations, liposomal amphotericin B treatment was associated with a lower incidence of infusion-related adverse events and nephrotoxicity. A higher than recommended dosage of liposomal amphotericin B (10 mg/kg/day) was associated with an increased incidence of nephrotoxicity compared with the standard dosage (3 mg/kg/day), although the incidence of infusion-related reactions did not differ between treatment groups. In general, liposomal amphotericin B treatment was not as well tolerated as echinocandin therapy in well designed clinical trials. As empirical therapy or for the treatment of confirmed invasive fungal infections in adult patients, liposomal amphotericin B recipients experienced more infusion-related events and nephrotoxicity than caspofungin or micafungin recipients. There was no difference in the incidence of these adverse events between the liposomal amphotericin B and micafungin groups in a study in paediatric patients.
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Affiliation(s)
- Marit D Moen
- Wolters Kluwer Health
- Adis, Auckland, New Zealand.
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&NA;. Prophylactic, empirical, pre-emptive and targeted antibacterial therapy all play a role in invasive aspergillosis. DRUGS & THERAPY PERSPECTIVES 2009. [DOI: 10.2165/0042310-200925010-00005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Sterling JA. Recent Publications on Medications and Pharmacy. Hosp Pharm 2008. [DOI: 10.1310/hpj4311-937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Hospital Pharmacy presents this feature to keep pharmacists abreast of new publications in the medical/pharmacy literature. Articles of interest regarding a broad scope of topics are abstracted monthly.
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