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BACKGROUND
Allergic bronchopulmonary aspergillosis (ABPA) in cystic fibrosis (CF) patients is a potentially fatal inflammatory disease due to the dual-type immune response provoked by the fungal antigens. Despite serious side effects long-term treatment with corticosteroids is often required.
Aspergillus fumigatus is a fungal pathogen that is capable of adapting to different host niches and to avoid host defenses. An enhanced understanding of how, and which, A. fumigatus signal transduction pathways are engaged in the regulation of these processes is essential for the development of
An 11-year-old boy with chronic granulomatous disease caused by cytochrome b deficiency developed right upper lung lobe aspergillosis. Intracerebral lesions developed on maximum doses of flucytosine and amphotericin B. Treatment with 16 mg/kg oral itraconazole was followed by a dramatic clinical
Aspergillus fumigatus is an opportunistic pathogenic fungus able to infect immunocompromised patients, eventually causing disseminated infections that are difficult to control and lead to high mortality rates. It is important to understand how the signaling pathways that regulate these factors
Aspergillus fumigatus is a fungal pathogen that causes several invasive and noninvasive diseases named aspergillosis. This disease is generally regarded as multifactorial, considering that several pathogenicity determinants are present during the establishment of this illness. It is necessary to
Metal restriction imposed by mammalian hosts during an infection is a common mechanism of defence to reduce or avoid the pathogen infection. Metals are essential for organism survival due to its involvement in several biological processes. Aspergillus fumigatus causes invasive aspergillosis, a
The trehalose biosynthesis pathway is critical for virulence in human and plant fungal pathogens. In this study, we tested the hypothesis that trehalose 6-phosphate phosphatase (T6PP) is required for Aspergillus fumigatus virulence. A mutant of the A. fumigatus T6PP, OrlA, displayed severe
The main characteristic of biofilm formation is extracellular matrix (ECM) production. The cells within the biofilm are surrounded by ECM which provides structural integrity and protection. During an infection, this protection is mainly against cells of the immune system and antifungal drugs. A.
Aspergillosis, candidiasis, and zygomycosis were diagnosed in tissues from three lovebirds (Agapornis roseicollis) using indirect enzyme-immunohistochemical techniques. In these techniques, the first antibody was raised against fungal antigen. A second antibody, which was raised in another animal
IgE and IgG antibodies against Af were measured by ELISA in sera from 15 patients with ABPA and compared with antibody levels in six patients with extrinsic asthma and immediate-type skin reactivity to Af (prick skin test 3+ or 4+) but no other evidence for ABPA. The assay used polyvinyl
The fungus Aspergillus fumigatus is a leading infectious killer in immunocompromised patients. Calcineurin, a calmodulin (CaM)-dependent protein phosphatase comprised of calcineurin A (CnaA) and calcineurin B (CnaB) subunits, localizes at the hyphal tips and septa to direct A. fumigatus invasion and
To evaluate procedures used for epidemiologic analysis of outbreaks of aspergillosis, we analyzed a collection of 35 Aspergillus fumigatus isolates using three typing methods: isoenzyme analysis (IEA), random amplified polymorphic DNA (RAPD) analysis, and restriction endonuclease analysis (REA).
Surfactant protein D (SP-D) plays a central role in pulmonary innate immune responses to microbes and allergens, often enhancing clearance of inhaled material. Although SP-D functions during bacterial and viral infections are well established, much less is known about its possible roles during
Precursor T-cell acute lymphoblastic leukaemia (T-ALL)/lymphoma (T-LBL) is a neoplasm with cytological features that include blast cells of medium size, high nuclear cytoplasmic ratio and inconspicuous nucleoli, which are usually TdT (Terminal Deoxynucleotidyl Transferase) positive and variably
Studies in yeasts have implicated the importance of Kin1 protein kinase, a member of the eukaryotic PAR1/MARK/MELK family, in polarized growth, cell division and septation through coordinated activity with the phosphatase, calcineurin. Kin1 is also required for virulence of the fungal pathogens