Structural changes in the lacrimal sac epithelium and associated lymphoid tissue during experimental dacryocystitis

Makoto Ishikawa1, Masabumi Kubo2, Seiji Maeda3, Yu Sawada1, Eiichi Uchio4, Takeshi Yoshitomi11Department of Ophthalmology, Akita University School of Medicine, Akita, Japan; 2Fukiage Eye Clinic, Hachinohe, Japan; 3Maeda Eye Clinic, Honjo, Japan; 4Department of Ophthalmology, Fukuoka University Schoo...

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Autores principales:	Yoshitomi T, Uchio E, Sawada Y, Maeda S, Kubo M, Ishikawa M
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2011
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/8f72542708ef4d9da9cdbd9c491200d0
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spelling	oai:doaj.org-article:8f72542708ef4d9da9cdbd9c491200d02021-12-02T06:16:17ZStructural changes in the lacrimal sac epithelium and associated lymphoid tissue during experimental dacryocystitis1177-54671177-5483https://doaj.org/article/8f72542708ef4d9da9cdbd9c491200d02011-10-01T00:00:00Zhttp://www.dovepress.com/structural-changes-in-the-lacrimal-sac-epithelium-and-associated-lymph-a8564https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Makoto Ishikawa1, Masabumi Kubo2, Seiji Maeda3, Yu Sawada1, Eiichi Uchio4, Takeshi Yoshitomi11Department of Ophthalmology, Akita University School of Medicine, Akita, Japan; 2Fukiage Eye Clinic, Hachinohe, Japan; 3Maeda Eye Clinic, Honjo, Japan; 4Department of Ophthalmology, Fukuoka University School of Medicine, Fukuoka, JapanPurpose: To examine structural changes in the lacrimal sac epithelium and associated lymphoid tissue of rabbits with experimentally induced dacryocystitis.Methods: Experimental dacryocystitis was induced by an inoculation of Staphylococcus aureus into the lacrimal sac. The histological changes of the inflamed lacrimal sac epithelium and associated lymphoid tissue were studied by light and electron microscopy.Results: After 1 month, numerous inflammatory cells (CD20-positive B lymphocytes, CD3-positive T lymphocytes, IgA-positive plasma cells, and polymorphonuclear leukocytes) infiltrated the lamina propria and the epithelium overlying the diffuse lymphoid tissue. Three months later, the density of the infiltrated leukocytes was markedly decreased. The epithelial lining overlying the diffuse lymphoid tissue became thicker with numerous secretory granules in the supranuclear regions.Conclusion: The lacrimal sac epithelium and associated lymphoid tissue play a major role in the defense mechanism during inflammation. Overproduction of secretory granules after bacterial inoculation could enhance the antimicrobial defense.Keywords: experimental dacryocystitis, lacrimal sac epithelium, lymphoid tissue, structure, rabbitYoshitomi TUchio ESawada YMaeda SKubo MIshikawa MDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2011, Iss default, Pp 1567-1574 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Yoshitomi T Uchio E Sawada Y Maeda S Kubo M Ishikawa M Structural changes in the lacrimal sac epithelium and associated lymphoid tissue during experimental dacryocystitis
description	Makoto Ishikawa1, Masabumi Kubo2, Seiji Maeda3, Yu Sawada1, Eiichi Uchio4, Takeshi Yoshitomi11Department of Ophthalmology, Akita University School of Medicine, Akita, Japan; 2Fukiage Eye Clinic, Hachinohe, Japan; 3Maeda Eye Clinic, Honjo, Japan; 4Department of Ophthalmology, Fukuoka University School of Medicine, Fukuoka, JapanPurpose: To examine structural changes in the lacrimal sac epithelium and associated lymphoid tissue of rabbits with experimentally induced dacryocystitis.Methods: Experimental dacryocystitis was induced by an inoculation of Staphylococcus aureus into the lacrimal sac. The histological changes of the inflamed lacrimal sac epithelium and associated lymphoid tissue were studied by light and electron microscopy.Results: After 1 month, numerous inflammatory cells (CD20-positive B lymphocytes, CD3-positive T lymphocytes, IgA-positive plasma cells, and polymorphonuclear leukocytes) infiltrated the lamina propria and the epithelium overlying the diffuse lymphoid tissue. Three months later, the density of the infiltrated leukocytes was markedly decreased. The epithelial lining overlying the diffuse lymphoid tissue became thicker with numerous secretory granules in the supranuclear regions.Conclusion: The lacrimal sac epithelium and associated lymphoid tissue play a major role in the defense mechanism during inflammation. Overproduction of secretory granules after bacterial inoculation could enhance the antimicrobial defense.Keywords: experimental dacryocystitis, lacrimal sac epithelium, lymphoid tissue, structure, rabbit
format	article
author	Yoshitomi T Uchio E Sawada Y Maeda S Kubo M Ishikawa M
author_facet	Yoshitomi T Uchio E Sawada Y Maeda S Kubo M Ishikawa M
author_sort	Yoshitomi T
title	Structural changes in the lacrimal sac epithelium and associated lymphoid tissue during experimental dacryocystitis
title_short	Structural changes in the lacrimal sac epithelium and associated lymphoid tissue during experimental dacryocystitis
title_full	Structural changes in the lacrimal sac epithelium and associated lymphoid tissue during experimental dacryocystitis
title_fullStr	Structural changes in the lacrimal sac epithelium and associated lymphoid tissue during experimental dacryocystitis
title_full_unstemmed	Structural changes in the lacrimal sac epithelium and associated lymphoid tissue during experimental dacryocystitis
title_sort	structural changes in the lacrimal sac epithelium and associated lymphoid tissue during experimental dacryocystitis
publisher	Dove Medical Press
publishDate	2011
url	https://doaj.org/article/8f72542708ef4d9da9cdbd9c491200d0
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Structural changes in the lacrimal sac epithelium and associated lymphoid tissue during experimental dacryocystitis

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