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Correction of characteristic abnormalities of microtubule function and granule morphology in Chediak-Higashi syndrome with cholinergic agonists.
J M Oliver, R B Zurier
J M Oliver, R B Zurier
Published May 1, 1976
Citation Information: J Clin Invest. 1976;57(5):1239-1247. https://doi.org/10.1172/JCI108392.
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Research Article

Correction of characteristic abnormalities of microtubule function and granule morphology in Chediak-Higashi syndrome with cholinergic agonists.

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Abstract

Chediak-Higashi (CH) syndrome is a genetic disorder of children and certain animal species including the beige mouse. We have previously described a membrane abnormality in CH mouse polymorphonuclear leukocytes (PMH). Whereas normal mouse PMN do not form surface caps with concanavalin A except after treatment with agents such as colchicine that inhibit microtubule assembly, CH mouse PMN show spontaneous cap formation. This capping is inhibited by 3',5 cyclic guanosine monophosphate and by the cholinergic agonists carbamylcholine and carbamyl beta-methylcholine that increase 3',5' cyclic guanosine monophosphate generation. These data suggested that microtubule function may be impaired in CH syndrome perhaps secondary to an abnormality in 3',5' cyclic guanosine monophosphate generation. The cholinergic agonists were also shown to prevent development of the giant granules that are pathognomonic of CH syndrome in embryonic fibroblasts isolated from CH mice and cultured in vitro. In this report it is shown that an extreme degree of spontaneous concanavalin A cap formation is also characteristic of peripheral blood PMN from two patients with CH syndrome. This indicates an abnormality of microtubule function in CH syndrome in man. 3',5' cyclic guanosine monophasphate, carbamylcholine, and carbamyl beta-methylcholine reduce spontaneous capping in CH cells. In addition, it is shown that monocytes isolated from the patients' blood and incubated in tissue culture generate a large complement of abnormal granules. When the same cells mature in vitro in the presence of carbamylcholine or carbamyl beta-methylcholine, the proportion of cells containing morphologically normal granules is significantly increased. These responses can be reproduced in vivo in the beige (CH) mouse. Animals treated for 3 wk and longer with carbamylcholine or carbamyl beta-methylcholline show normal granule morphology and a normal degree of concanavalin A cap formation in peripheral blood PMN leukocytes.

Authors

J M Oliver, R B Zurier

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