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BioMed Research International
Volume 2013 (2013), Article ID 683768, 8 pages
http://dx.doi.org/10.1155/2013/683768
Research Article

Changes of Regulatory T and B Cells in Patients with Papillary Thyroid Carcinoma after 131I Radioablation: A Preliminary Study

1Department of Nuclear Medicine, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, China
2Department of Hematology, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, China
3Biomedical Research Center, Zhongshan Hospital, Fudan University, Shanghai 200032, China

Received 24 July 2013; Accepted 2 September 2013

Academic Editor: Hong Zhang

Copyright © 2013 Lei Jiang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Introduction. Lymphocytic infiltration and specific lymphocytes subsets may play important roles in papillary thyroid carcinoma (PTC) progression and prognosis. In this study, we try to understand the influence of 131I radioablation on the important lymphocytes subtypes of regulatory T and B cells (Tregs and Bregs). Methods. Peripheral blood mononuclear cells from 30 PTC patients before and after 131I therapy, and 20 healthy donors were collected. The expression of Tregs (CD4+CD25+ ) and B cell (CD5+CD19+) and production and secretion of interleukin 10 (IL-10) were analyzed by FACS and ELISA assay, respectively. Results. For Tregs percentage in peripheral blood lymphocytes, there was no difference between pretreatment and control and between posttreatment and control. Compared with pretherapy, increased Tregs infiltration was noted in posttherapy ( ). Although no difference was between pretreatment and control, compared with these two groups, decreased CD19+ and CD5+CD19+ B cell percentage in posttreatment was observed ( ). Among these groups, no significant difference was displayed in intracellular IL-10 production and extracellular IL-10 secretion. Conclusions. 131I Radioablation increased Tregs and decreased CD19+ and CD5+CD19+ B cells percentage after treatment. However, it has no effect on IL-10 and lymphocytes in peripheral blood. Therefore, longer follow-up of Tregs and Bregs should be further investigated.