keratitis/carbohydrate

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Pathogenesis of Acanthamoeba keratitis: carbohydrate-mediated host-parasite interactions.

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Acanthamoeba keratitis is a sight-threatening corneal infection. In a recent study, the saccharide mannose has been shown to inhibit the binding of Acanthamoeba organisms to the epithelium of the cornea (L. D. Morton, G. L. McLaughlin, and H. E. Whiteley, Infect. Immun. 59:3819-3822, 1991). In an

An L-fucose specific lectin from Aspergillus niger isolated from mycotic keratitis patient and its interaction with human pancreatic adenocarcinoma PANC-1 cells.

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An L-fucose specific lectin from pathogenic fungus Aspergillus niger isolated from the corneal smears of keratitis patient was purified in a single step using mucin coupled sepharose-4B column by 58-fold. The purified lectin, ANL has molecular mass of 30 kDa by SDS-PAGE and 31.6 kDa by ESI-MS. ANL

Fluorescein-conjugated lectin visualization of fungi and acanthamoebae in infectious keratitis.

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The authors investigated the efficacy of two fluorescein-conjugated lectins (FCLs), concanavalin A (F-ConA) and wheat germ agglutinin (F-WGA), to visualize microorganisms from clinical specimens with documented mycotic and acanthamoebic keratitis. Corneal scrapings from 18 patients with

Role of carbohydrate-mediated adherence in cytopathogenic mechanisms of Acanthamoeba.

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Acanthamoeba keratitis is a vision-threatening corneal infection. The mannose-binding protein of Acanthamoeba is thought to mediate adhesion of parasites to host cells. We characterized the amoeba lectin with respect to its carbohydrate binding properties and the role in amoeba-induced cytopathic

Description of Virulent Factors and Horizontal Gene Transfers of Keratitis-Associated Amoeba Acanthamoeba Triangularis by Genome Analysis.

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Acanthamoeba triangularis strain SH 621 is a free-living amoeba belonging to Acanthamoeba ribo-genotype T4. This ubiquitous protist is among the free-living amoebas responsible for Acanthamoeba keratitis, a severe infection of human cornea. Genome sequencing and genomic

Carbohydrate deposits on the surfaces of worn extended-wear soft contact lenses.

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Three different commercial extended-wear soft contact lenses worn continuously by patients for at least 28 days were stained with fluorescein isothiocyanate-labeled lectins. These lectins detected the presence of alpha-linked or beta-linked D-mannose, D-glucose, D-galactose, L-fucose,

Biofilm characterization of Fusarium solani keratitis isolate: increased resistance to antifungals and UV light.

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Fusarium solani has drawn phytopathogenic, biotechnological, and medical interest. In humans, it is associated with localized infections, such as onychomycosis and keratomycosis, as well as invasive infections in immunocompromised patients. One pathogenicity factor of filamentous fungi is biofilm

Application of vaccine technology to prevention of Pseudomonas aeruginosa infections.

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Development of an effective vaccine against the multiple presentations of Pseudomonas aeruginosa infection, including nosocomial pneumonia, bloodstream infections, chronic lung infections in cystic fibrosis patients and potentially sight-threatening keratitis in users of contact lenses, is a high

Acanthamoeba castellanii: characterization of an adhesin molecule.

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Acanthamoeba castellanii is a free-living protozoan that causes keratitis in humans and has been associated with pneumonia and granulomatous amebic encephalitis in dogs, sheep, and other species. Adherence of the Acanthamoeba to epithelial cells is critical to the pathogenesis of this disease. In

The use of fluorescein-conjugated lectins for visualizing atypical mycobacteria.

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We investigated the feasibility of using fluorescein-conjugated lectins for visualizing and differentiating two species of atypical mycobacteria. Pure cultures of Mycobacterium fortuitum and Mycobacterium chelonei were established, as was an experimental model of infectious keratitis involving these

"Targeting the Feast of a Sleeping Beast": Nutrient and Mineral dependencies of an encysted Acanthamoeba castellanii

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Acanthamoeba spp. cause a corneal infection, Acanthamoeba keratitis (AK), and a cerebral infection, granulomatous amoebic encephalitis (GAE). Though aggressive chemotherapy has been able to kill the active trophozoite form of Acanthamoeba, the encysted form of this parasite has remained problematic

The most abundant cyst wall proteins of Acanthamoeba castellanii are lectins that bind cellulose and localize to distinct structures in developing and mature cyst walls.

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Acanthamoeba castellanii, which causes keratitis and blindness in under-resourced countries, is an emerging pathogen worldwide, because of its association with contact lens use. The wall makes cysts resistant to sterilizing reagents in lens solutions and to antibiotics applied to the

Colocalization of Galectin-3 With CD147 Is Associated With Increased Gelatinolytic Activity in Ulcerating Human Corneas.

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Galectin-3 is a carbohydrate-binding protein known to promote expression of matrix metalloproteinases, a hallmark of ulceration, through interaction with the extracellular matrix metalloproteinase inducer CD147. The aim of this study was to investigate the distribution of galectin-3 in corneas of

Combating Acanthamoeba spp. cysts: what are the options?

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Acanthamoeba spp. are protist pathogens and causative agents of serious infections including keratitis and granulomatous amoebic encephalitis. Its ability to convert into dormant and highly resistant cysts form limits effectiveness of available therapeutic agents and presents a pivotal challenge for

Pathological lymphangiogenesis is modulated by galectin-8-dependent crosstalk between podoplanin and integrin-associated VEGFR-3.

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Lymphangiogenesis plays a pivotal role in diverse pathological conditions. Here, we demonstrate that a carbohydrate-binding protein, galectin-8, promotes pathological lymphangiogenesis. Galectin-8 is markedly upregulated in inflamed human and mouse corneas, and galectin-8 inhibitors reduce

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