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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Immunocytochemical identification of azurophilic and specific granule markers in the giant granules of Chediak-Higashi neutrophils.

We used immunofluorescent microscopy to characterize the abnormal granules in neutrophils from five patients with Chediak-Higashi disease. Monospecific antiserums to the azurophilic markers myeloperoxidase, elastase, cathepsin G and lysozyme, and to the specific granule markers lactoferrin and lysozyme, were labeled with fluorescein and rhodamine and were used to demonstrate two antigens in the same cell simultaneously. The abnormal granules in Chediak-Higashi neutrophils contained both azurophilic and specific granule markers. Normal-appearing lactoferrin-positive granules were also present, but normal azurophilic granules were not seen. Analysis of bone-marrow samples from two of these patients suggested that the abnormal granules were formed during granulocyte maturation by the progressive aggregation and fusion of normally formed azurophilic and specific granules. These results are consistent with a membrane abnormality or a defect of microtubular function leading to inappropriate granule fusion, and suggest that the granular abnormality is more generalized than previously appreciated.[1]


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