title: Protective effect of small molecule analogues of the Acanthocheilonema viteae secreted product ES-62 on oxazolone-induced ear inflammation.
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.
authors.affiliation: Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK.
authors.forename: Lamyaa
authors.initials: L
authors.lastname: Al-Riyami
authors.affiliation: Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow G12 8TA, UK.
authors.forename: David T
authors.initials: DT
authors.lastname: Rodgers
authors.affiliation: Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK.
authors.forename: Justyna
authors.initials: J
authors.lastname: Rzepecka
authors.affiliation: Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow G12 8TA, UK.
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Pineda
authors.affiliation: Department of Pure & Applied Chemistry, University of Strathclyde, Glasgow G1 1XI, UK.
authors.forename: Colin J
authors.initials: CJ
authors.lastname: Suckling
authors.affiliation: Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow G12 8TA, UK.
authors.forename: Margaret M
authors.initials: MM
authors.lastname: Harnett
authors.affiliation: Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK. Electronic address: W.Harnett@strath.ac.uk.
authors.forename: William
authors.initials: W
authors.lastname: Harnett
mesh_terms: D063486:Acanthocheilonema / Q000276:immunology*; D000276:Adjuvants, Immunologic / Q000633:toxicity; D000818:Animals; D017449:Dermatitis, Allergic Contact / Q000276:immunology* / Q000469:parasitology / Q000517:prevention & control; D004195:Disease Models, Animal; D015801:Helminth Proteins / Q000276:immunology* / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C; D010032:Otitis Externa / Q000139:chemically induced / Q000473:pathology / Q000517:prevention & control*; D010081:Oxazolone / Q000633:toxicity; D060888:Real-Time Polymerase Chain Reaction
chemical_list: D000276:Adjuvants, Immunologic; C435884:ES-62 protein, Acanthocheilonema viteae; D015801:Helminth Proteins; D010081:Oxazolone
keywords: ES-62; Immunomodulation; Oxazolone; Parasitic worm; Skin inflammation
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