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FcgammaRIIb Expression Is Decreased on Naive and Marginal Zone-Like B Cells From Females With Multiple SclerosisB cells are critical to the development of multiple sclerosis (MS), but the mechanisms by which they contribute to the disease are poorly defined. We hypothesised that the expression of CD32b (FcγRIIb), a receptor for the Fc region of IgG with inhibitory activities in B cells, is lower on B cell subsets from people with clinically isolated syndrome (CIS) or MS. CD32b expression was highest on post-naive IgM+ B cell subsets in healthy controls. For females with MS or CIS, significantly lower CD32b expression was identified on IgM+ B cell subsets, including naive and IgMhi MZ-like B cells, when compared with control females. Lower CD32b expression on these B cell subsets was associated with detectable anti-Epstein Barr Virus viral capsid antigen IgM antibodies, and higher serum levels of B cell activating factor. To investigate the effects of lower CD32b expression, B cells were polyclonally activated in the presence of IgG immune complexes, with or without a CD32b blocking antibody, and the expression of TNF and IL-10 in B cell subsets was assessed.
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Effects of UVR exposure on the gut microbiota of mice and humansBoth human and murine studies report that multiple exposures to sub-erythemal UV radiation can increase the diversity of the gut microbiome
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Exposure to Solar UVR Suppresses Cell-Mediated Immunization Responses in Humans: The Australian Ultraviolet Radiation and Immunity StudyHigher UVR exposure at antigen sensitization was associated with a reduced delayed-type hypersensitivity response and altered T helper type 17 kinetics
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Inflammatory bowel diseases: interrelationships between dietary vitamin D, exposure to UV radiation and the fecal microbiomeThis review explores the interaction of vitamin D, and ultraviolet radiation, with the intestinal innate and adaptive immune systems
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UVB phototherapy for participants with an early form of multiple sclerosisMatt Prue Stephanie Cooper Hart Trend BCA Marketing, BSc Statistics and Applied Statistics, PhD BSc (Hons) MSc PhD BSc PhD Manager, Biostatistics
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Topical 1,25-dihydroxyvitamin D3 subverts the priming ability of draining lymph node dendritic cellsThe active form of vitamin D, 1,25-hydroxyvitamin D(3) [1,25(OH)(2)D(3)] is produced in skin following exposure to sunlight
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1,25-dihydroxyvitamin D3 enhances the ability of transferred CD4+ CD25+ cells to modulate T helper type 2-driven asthmatic responsesThe severity of allergic diseases may be modified by vitamin D. However, the immune pathways modulated by the active form of vitamin D, 1,25-dihydroxyvitamin D.
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Investigating the roles of regulatory T cells, mast cells and interleukin-9 in the control of skin inflammat roles of regulatory T cells, mast cells and interleukin-9 in the control of skin inflammation by vitamin D. Arch Dermatol Res. 2018;310(3):221-30.We investigated the ability of topical 1,25(OH)2D to suppress contact dermatitis through an IL9 dependent process, examining mast cells and IL9 secreting cells.
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Vitamin D deficiency causes airway hyperresponsiveness and increases airway smooth muscle mass in the lungs of female BALB/c miceWe tested whether there is a causal association between vitamin D deficiency, airway smooth muscle (ASM) mass, and the development of airway hyperresponsiveness
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High-dose intramuscular Vitamin D provides long-lasting moderate increases in serum 25-hydroxVitamin D levels and shorter-Term changes in plasma calciumIntramuscular injection of a large bolus of Vitamin D effectively increases serum 25-hydroxyVitamin D levels without evidence of metabolic abnormality.