Expression of endothelia and lymphocyte adhesion molecules in bronchus-associated lymphoid tissue (BALT) in adult human lung
<p>Abstract</p> <p>Background</p> <p>Bronchus-associated lymphoid tissue (BALT) is the secondary lymphoid tissue in bronchial mucosa and is involved in the development of bronchopulmonary immune responses. Although migration of lymphocytes from blood vessels into second...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2009-10-01
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| Series: | Respiratory Research |
| Online Access: | http://respiratory-research.com/content/10/1/97 |
| _version_ | 1818530196155793408 |
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| author | Takeuchi Toru Kusumoto Mayumi Aoyama Kohji Nishijima Hiroo Xu Baohui Kawamata Nakaaki Tei Chuwa Michie Sara A Matsuyama Takami |
| author_facet | Takeuchi Toru Kusumoto Mayumi Aoyama Kohji Nishijima Hiroo Xu Baohui Kawamata Nakaaki Tei Chuwa Michie Sara A Matsuyama Takami |
| author_sort | Takeuchi Toru |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Background</p> <p>Bronchus-associated lymphoid tissue (BALT) is the secondary lymphoid tissue in bronchial mucosa and is involved in the development of bronchopulmonary immune responses. Although migration of lymphocytes from blood vessels into secondary lymphoid tissues is critical for the development of appropriate adaptive immunity, the endothelia and lymphocyte adhesion molecules that recruit specific subsets of lymphocytes into human BALT are not known. The aim of this study was to determine which adhesion molecules are expressed on lymphocytes and high endothelial venules (HEVs) in human BALT.</p> <p>Methods</p> <p>We immunostained frozen sections of BALT from lobectomy specimens from 17 patients with lung carcinoma with a panel of monoclonal antibodies to endothelia and lymphocyte adhesion molecules.</p> <p>Results</p> <p>Sections of BALT showed B cell follicles surrounded by T cells. Most BALT CD4<sup>+ </sup>T cells had a CD45RO<sup>+ </sup>memory phenotype. Almost all BALT B cells expressed α<sub>4 </sub>integrin and L-selectin. In contrast, 43% of BALT T cells expressed α<sub>4 </sub>integrin and 20% of BALT T cells expressed L-selectin. Almost all BALT lymphocytes expressed LFA-1. HEVs, which support the migration of lymphocytes from the bloodstream into secondary lymphoid tissues, were prominent in BALT. All HEVs expressed peripheral node addressin, most HEVs expressed vascular cell adhesion molecule-1, and no HEVs expressed mucosal addressin cell adhesion molecule-1.</p> <p>Conclusion</p> <p>Human BALT expresses endothelia and lymphocyte adhesion molecules that may be important in recruiting naive and memory/effector lymphocytes to BALT during protective and pathologic bronchopulmonary immune responses.</p> |
| first_indexed | 2024-12-11T17:16:39Z |
| format | Article |
| id | doaj.art-b378b63e35e9485eb0bbb6c74ae077c1 |
| institution | Directory Open Access Journal |
| issn | 1465-9921 |
| language | English |
| last_indexed | 2024-12-11T17:16:39Z |
| publishDate | 2009-10-01 |
| publisher | BMC |
| record_format | Article |
| series | Respiratory Research |
| spelling | doaj.art-b378b63e35e9485eb0bbb6c74ae077c12022-12-22T00:57:19ZengBMCRespiratory Research1465-99212009-10-011019710.1186/1465-9921-10-97Expression of endothelia and lymphocyte adhesion molecules in bronchus-associated lymphoid tissue (BALT) in adult human lungTakeuchi ToruKusumoto MayumiAoyama KohjiNishijima HirooXu BaohuiKawamata NakaakiTei ChuwaMichie Sara AMatsuyama Takami<p>Abstract</p> <p>Background</p> <p>Bronchus-associated lymphoid tissue (BALT) is the secondary lymphoid tissue in bronchial mucosa and is involved in the development of bronchopulmonary immune responses. Although migration of lymphocytes from blood vessels into secondary lymphoid tissues is critical for the development of appropriate adaptive immunity, the endothelia and lymphocyte adhesion molecules that recruit specific subsets of lymphocytes into human BALT are not known. The aim of this study was to determine which adhesion molecules are expressed on lymphocytes and high endothelial venules (HEVs) in human BALT.</p> <p>Methods</p> <p>We immunostained frozen sections of BALT from lobectomy specimens from 17 patients with lung carcinoma with a panel of monoclonal antibodies to endothelia and lymphocyte adhesion molecules.</p> <p>Results</p> <p>Sections of BALT showed B cell follicles surrounded by T cells. Most BALT CD4<sup>+ </sup>T cells had a CD45RO<sup>+ </sup>memory phenotype. Almost all BALT B cells expressed α<sub>4 </sub>integrin and L-selectin. In contrast, 43% of BALT T cells expressed α<sub>4 </sub>integrin and 20% of BALT T cells expressed L-selectin. Almost all BALT lymphocytes expressed LFA-1. HEVs, which support the migration of lymphocytes from the bloodstream into secondary lymphoid tissues, were prominent in BALT. All HEVs expressed peripheral node addressin, most HEVs expressed vascular cell adhesion molecule-1, and no HEVs expressed mucosal addressin cell adhesion molecule-1.</p> <p>Conclusion</p> <p>Human BALT expresses endothelia and lymphocyte adhesion molecules that may be important in recruiting naive and memory/effector lymphocytes to BALT during protective and pathologic bronchopulmonary immune responses.</p>http://respiratory-research.com/content/10/1/97 |
| spellingShingle | Takeuchi Toru Kusumoto Mayumi Aoyama Kohji Nishijima Hiroo Xu Baohui Kawamata Nakaaki Tei Chuwa Michie Sara A Matsuyama Takami Expression of endothelia and lymphocyte adhesion molecules in bronchus-associated lymphoid tissue (BALT) in adult human lung Respiratory Research |
| title | Expression of endothelia and lymphocyte adhesion molecules in bronchus-associated lymphoid tissue (BALT) in adult human lung |
| title_full | Expression of endothelia and lymphocyte adhesion molecules in bronchus-associated lymphoid tissue (BALT) in adult human lung |
| title_fullStr | Expression of endothelia and lymphocyte adhesion molecules in bronchus-associated lymphoid tissue (BALT) in adult human lung |
| title_full_unstemmed | Expression of endothelia and lymphocyte adhesion molecules in bronchus-associated lymphoid tissue (BALT) in adult human lung |
| title_short | Expression of endothelia and lymphocyte adhesion molecules in bronchus-associated lymphoid tissue (BALT) in adult human lung |
| title_sort | expression of endothelia and lymphocyte adhesion molecules in bronchus associated lymphoid tissue balt in adult human lung |
| url | http://respiratory-research.com/content/10/1/97 |
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