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The mast cells have been suggested to be a cellular source of nitric oxide (NO) which level is increased in the pathogenesis of asthma. However, isoforms of the NO generating enzyme, nitric oxide synthase (NOS), in primary human mast cells have not been defined due to the lack of a suitable model. We hence examined directly the expression of NOS mRNA and proteins in primary human cultured mast cells...
During some helminth infections, increased expression of the low-affinity receptor for IgE (CD23/FcϵRII) by macrophages and/or increased levels of plasma IgE have been seen, but their role in host protection or disease progression remains unclear. Recently, crosslinking of CD23 was shown to promote intracellular killing of Leishmania parasites in human macrophages, a phenomenon involving the production...
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