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New insights into persistent corneal subepithelial infiltrates following epidemic keratoconjunctivitis: The first case report with ultrastructural and immunohistochemical investigations.
Acta Histochem
January 2025
Section of Anatomy and Histology, Imaging Platform, Department of Experimental and Clinical Medicine, University of Florence, Largo Brambilla 3, Florence 50134, Italy. Electronic address:
Epidemic keratoconjunctivitis (EKC) is one of the most severe clinical manifestations of human adenovirus ocular surface infection, which may lead to the formation of subepithelial infiltrates (SEIs) in the anterior corneal stroma in 20-50 % of cases. SEIs may be asymptomatic or give rise to corneal aberrations and visual impairment for months or years after acute infection, despite treatments. Here, we describe the ultrastructural and immunophenotypic features of the anterior corneal stroma of a patient who underwent superficial anterior lamellar keratoplasty (SALK) surgery to remove corneal opacities related to clinically significant and steroid-unresponsive, long-lasting SEIs after adenoviral EKC.
View Article and Find Full Text PDFZonal Characteristics of Collagen Ultrastructure and Responses to Mechanical Loading in Articular Cartilage.
Acta Biomater
January 2025
Biomedical Engineering, College of Engineering, Mathematics and Physical Sciences, University of Exeter, UK. Electronic address:
The biomechanical properties of articular cartilage arise from a complex bioenvironment comprising hierarchically organised collagen networks within the extracellular matrix (ECM) that interact with the proteoglycan-rich interstitial fluid. This network features a depth-dependent fibril organisation across different zones. Understanding how collagen fibrils respond to external loading is key to elucidating the mechanisms behind lesion and managing degenerative conditions like osteoarthritis.
View Article and Find Full Text PDFUltrastructure of Olkasia polycarbonata (Euglenozoa, Euglenida) demonstrates cytoskeletal innovations associated with the feeding and flagellar apparatuses.
J Eukaryot Microbiol
January 2025
Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada.
Euglenids are flagellates with diverse modes of nutrition, including the photosynthetic Euglenophyceae, which acquired plastids via secondary endosymbiosis with green algae, and a diverse assemblage of predators of bacteria and other microeukaryotes. Most heterotrophic euglenids have never been cultivated, so their morphology remains poorly characterized and limited to only a few studies. "Ploeotids" are a paraphyletic group representing much of the diversity of heterotrophic euglenids and are characterized by their feeding apparatus and a rigid pellicle of 10-12 longitudinally arranged strips.
View Article and Find Full Text PDFMorphometric parameters of seeds as a practical method for identifying rare species of the genus L. (Liliaceae) from East Kazakhstan region.
PhytoKeys
January 2025
Department of Plant Taxonomy and Nature Conservation, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308 Gdańsk, Poland University of Gdansk Gdańsk Poland.
The genus includes some of the most important ornamental plants. The aim of this work was to study the seed morphology of species from East Kazakhstan, including seed coat structure. An analysis focused on five taxa from various natural environmental conditions.
View Article and Find Full Text PDF3D scaffold of hydroxyapatite/β tricalcium phosphate from mussel shells: Synthesis, characterization and cytotoxicity.
Heliyon
January 2025
Department of Cell Biology, Federal University of Paraná, Post box-19031, Zip code -81531-970, Curitiba, PR, Brazil.
Unlabelled: Bone tissue substitutes are increasing in importance. Hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP) act as a cell matrix and improve its mechanical properties. One of their raw materials is marine-origin by-products.
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