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Morphofunctional analysis of antigen uptake mechanisms following sublingual immunotherapy with beads in mice

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/73351

Title: Morphofunctional analysis of antigen uptake mechanisms following sublingual immunotherapy with beads in mice
Authors: Elewa, Yaser Hosny Ali Browse this author →ORCID
Mizoguchi, Tatsuya Browse this author
Ichii, Osamu Browse this author →KAKEN DB
Nakamura, Teppei Browse this author
Kon, Yasuhiro Browse this author →KAKEN DB
Issue Date: 20-Dec-2018
Publisher: PLOS
Journal Title: PLoS ONE
Volume: 13
Issue: 12
Start Page: e0201330
Publisher DOI: 10.1371/journal.pone.0201330
Abstract: Background Recently, sublingual immunotherapy (SLIT) has been used as a safe and efficient method for the treatment of and immunization against asthma and various allergies. However, the routes of antigen/allergen (particulate antigen) uptake through the mucosa of the oral cavity remain incompletely understood, as do the roles of sex and age in the process. For this purpose, to elucidate the mechanism and efficacy of SLIT among different sexes and ages, microbeads were dripped into the sublingual region to mimic particulate antigen uptake by the sublingual mucosa. Methods Twenty microliters of either phosphate buffered saline (PBS) or fluorescently labelled microbeads (latex and silica beads) were placed under the tongue of both male and female C57BL/6 mice at young (3 months) and old (6 months) ages. The lower jaw was examined 30 min after administration, and beads were detected with a fluorescence stereomicro-scope. Morphological observations of the mucosa of the fluorescent areas were made with a scanning electron microscope (SEM) and an all-in-one light fluorescence microscope (LM). Fluorescence intensity was compared between both sexes and ages. Results Stereomicroscopic observation revealed fluorescent illuminations in three compartments of the sublingual mucosa: the sublingual caruncles (SC), the oral rostral mucosa (OR) and the buccal mucosa (BM). Interestingly, the fluorescence intensity tended to be higher among females than among males in the SC region in particular. However, there were no significant age-related differences. SEM and LM revealed beads in the lumina of both mandibular ducts and sublingual ducts (Sd). Additionally, the apical cytoplasm of some Sd cells contained silica beads. However, there was no specification in the OR mucosa or BM. Conclusions This study reveals the major role Sd plays in local immunity via the antigen uptake mechanisms. Furthermore, our data suggest that the efficacy of SLIT in humans could be affected by sex.
Rights: https://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/73351
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: ELEWA YASER HOSNY ALI

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