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Loss of interleukin-21 leads to atrophic germinal centers in multicentric Castleman’s disease

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Abstract

Both multicentric Castleman’s disease (MCD) and immunoglobulin (Ig)G4-related disease (IgG4-RD) are systemic diseases, presenting with hypergammaglobulinemia and elevated serum levels of IgG4. However, with regard to histopathological findings, MCD shows atrophic germinal centers. On the other hand, expanded germinal centers are detected in IgG4-RD. We extracted germinal centers from specimens of each disorder by microdissection and analyzed the expression of mRNAs by real-time polymerase chain reaction to clarify the mechanisms underlying atrophied germinal centers in MCD. This analysis disclosed loss of interleukin (IL)-21 and B cell lymphoma (Bcl)-6 in the germinal centers of MCD. Loss of IL-21 is considered to be involved in the disappearance of Bcl-6 and leads to atrophied germinal centers in MCD.

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Acknowledgments

This work was supported by the Research on Measures for Intractable Diseases Project matching fund subsidy from the Ministry of Health Labour and Welfare, Japan, and the Minako Shiokawa Young Investor’s Award for Collagen Disease Research, from the Japan Rheumatism Foundation.

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The authors declare that they have no conflict of interest.

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Correspondence to Motohisa Yamamoto.

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Yajima, H., Yamamoto, M., Shimizu, Y. et al. Loss of interleukin-21 leads to atrophic germinal centers in multicentric Castleman’s disease. Ann Hematol 95, 35–40 (2016). https://doi.org/10.1007/s00277-015-2500-2

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  • DOI: https://doi.org/10.1007/s00277-015-2500-2

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