TY - JOUR
T1 - Lymphocyte recruitment via high endothelial venules in lymphoid stroma of Warthin's tumour
AU - Ohya, Ayumi
AU - Kobayashi, Motohiro
AU - Sakai, Yasuhiro
AU - Kawashima, Hiroto
AU - Kageyama, Shunsuke
AU - Nakayama, Jun
N1 - Funding Information:
supported in part by Grant-in-Aid for Scientific Research 24590410 from the Japan Society for the Promotion of Science (to MK). The authors state that there are no conflicts of interest to disclose.
PY - 2013/2
Y1 - 2013/2
N2 - Aims: Warthin's tumour is composed of bilayered oncocytic epithelium and organised lymphoid stroma, which resembles mucosa-associated lymphoid tissue (MALT); however, the histogenesis of the lymphoid stroma is not fully understood. We hypothesised that lymphocytes consisting of the stroma are recruited via high endothelial venules (HEVs) by the mechanism operating in normal lymphocyte homing in secondary lymphoid organs. The aim of this study was to determine immunohistochemically the molecules expressed on these HEVs. Methods: Tissue sections of Warthin's tumour (n=10) were immunostained for vascular addressin-related antigens including peripheral lymph node addressin (PNAd) and mucosal addressin cell adhesion molecule 1 (MAdCAM-1). An L-selectin·IgM chimera in situ binding assay was also carried out. Triple immunostaining for PNAd, CD3, and CD20/CD79α was performed to determine which lymphocyte subsets are closely associated with these HEVs. Results: HEVs in the lymphoid stroma of Warthin's tumour express PNAd, which is detected by MECA-79 as well as recently developed monoclonal antibodies S1 and S2. These HEVs were bound by L-selectin·IgM chimeras in a calciumdependent manner, and numbers of lymphocytes, particularly T cells, attached to these HEVs. Conclusions: The lymphoid stroma of Warthin's tumour is most likely developed by lymphocytes recruited via HEVs.
AB - Aims: Warthin's tumour is composed of bilayered oncocytic epithelium and organised lymphoid stroma, which resembles mucosa-associated lymphoid tissue (MALT); however, the histogenesis of the lymphoid stroma is not fully understood. We hypothesised that lymphocytes consisting of the stroma are recruited via high endothelial venules (HEVs) by the mechanism operating in normal lymphocyte homing in secondary lymphoid organs. The aim of this study was to determine immunohistochemically the molecules expressed on these HEVs. Methods: Tissue sections of Warthin's tumour (n=10) were immunostained for vascular addressin-related antigens including peripheral lymph node addressin (PNAd) and mucosal addressin cell adhesion molecule 1 (MAdCAM-1). An L-selectin·IgM chimera in situ binding assay was also carried out. Triple immunostaining for PNAd, CD3, and CD20/CD79α was performed to determine which lymphocyte subsets are closely associated with these HEVs. Results: HEVs in the lymphoid stroma of Warthin's tumour express PNAd, which is detected by MECA-79 as well as recently developed monoclonal antibodies S1 and S2. These HEVs were bound by L-selectin·IgM chimeras in a calciumdependent manner, and numbers of lymphocytes, particularly T cells, attached to these HEVs. Conclusions: The lymphoid stroma of Warthin's tumour is most likely developed by lymphocytes recruited via HEVs.
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U2 - 10.1097/PAT.0b013e32835c766d
DO - 10.1097/PAT.0b013e32835c766d
M3 - Article
C2 - 23250041
AN - SCOPUS:84873854252
SN - 0031-3025
VL - 45
SP - 150
EP - 154
JO - Pathology
JF - Pathology
IS - 2
ER -