Protective effect of small molecule analogues of the Acanthocheilonema viteae secreted product ES-62 on oxazolone-induced ear inflammation

Al-Riyami, L., Rodgers, D. T., Rzepecka, J., Pineda, M. A. , Suckling, C. J., Harnett, M. M. and Harnett, W. (2015) Protective effect of small molecule analogues of the Acanthocheilonema viteae secreted product ES-62 on oxazolone-induced ear inflammation. Experimental Parasitology, 158, pp. 18-22. (doi:10.1016/j.exppara.2015.03.025) (PMID:25836375) (PMCID:PMC4659540)

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Abstract

ES-62 is the major secreted protein of the rodent filarial nematode Acanthocheilonema viteae. The molecule contains covalently attached phosphorylcholine (PC) residues, which confer anti-inflammatory properties on ES-62, underpinning the idea that drugs based on this active moiety may have therapeutic potential in human diseases associated with aberrant inflammation. Here we demonstrate that two synthetic small molecule analogues (SMAs) of ES-62 termed SMA 11a and SMA 12b are protective in the oxazolone-induced acute allergic contact dermatitis mouse model of skin inflammation, as measured by a significant reduction in ear inflammation following their administration before oxazolone sensitisation and before oxazolone challenge. Furthermore, it was found that when tested, 12b was effective at reducing ear swelling even when first administered before challenge. Histological analysis of the ears showed elevated cellular infiltration and collagen deposition in oxazolone-treated mice both of which were reduced by treatment with the two SMAs. Likewise, the oxazolone-induced increase in IFNγ mRNA in the ears was reduced but no effect on other cytokines investigated was observed. Finally, no influence on the mast cell populations in the ear was observed.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Harnett, Professor Margaret and Harnett, Professor William and Pineda, Dr Miguel
Authors: Al-Riyami, L., Rodgers, D. T., Rzepecka, J., Pineda, M. A., Suckling, C. J., Harnett, M. M., and Harnett, W.
College/School:College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
Journal Name:Experimental Parasitology
Publisher:Elsevier B.V.
ISSN:0014-4894
ISSN (Online):1090-2449
Published Online:30 March 2015
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Experimental Parasitology 158:18-22
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
495342ES-62, TLR4, the Mast Cell and development of novel drugs for mast cell-mediated inflammationMargaret HarnettWellcome Trust (WELLCOME)086852/Z/08/ZIII -IMMUNOLOGY