Abstract
Signal transducers and activators of transcription 3 (STAT3) are activated by various cytokines and oncogenes; however, the activity and pathogenesis of STAT3 in diffuse large B cell lymphoma of the central nervous system have not been thoroughly elucidated. We investigated the phosphorylation levels of STAT3 in 40 specimens of primary central nervous system diffuse large B-cell lymphoma (PCNS DLBCL) and analyzed the association between phsopho-STAT3 (pSTAT3) expression and cerebrospinal fluid (CSF) concentration of interleukin-10 (IL-10) or IL-6. Immunohistochemistry and Western blot analysis revealed that most of the specimens in PCNS DLBCL expressed pSTST3 protein, and a strong phosphorylation levels of STAT3 was statistically associated with high CSF IL-10 levels, but not with CSF IL-6 levels. Next, we demonstrated that recombinant IL-10 and CSF containing IL-10 induced the phosphorylation of STAT3 in PCNS DLBCL cells. Furthermore, molecular subtype classified by Hans’ algorithm was correlated with pSTAT3 expression levels and CSF IL-10 levels. These results suggest that the STAT3 activity is correlated with CSF IL-10 level, which is a useful marker for STAT3 activity in PCNS DLBCLs.
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This study was supported in part by a Grant-in-Aid for Scientific Research to Eiji Kohmura (25293309), Takashi Sasayama (25462258), and Kazuhiro Tanaka (24791501) from the Japanese Ministry of Education, Culture, Sports, Science and Technology.
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Supplementary Fig. 1 Histological examinations of HKBML tumors implanted into nude mice. HKBML PCNSL cells (5 x 106/200 μl) were injected s.c. into the right flank of nude mice (BALB-c nu/nu). After 2 weeks, the tumor was removed, fixed, and analyzed by immunohistochemistry. The HKBML tumor was identified as a non-GCB type tumor. (Original magnification: × 400)
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Mizowaki, T., Sasayama, T., Tanaka, K. et al. STAT3 activation is associated with cerebrospinal fluid interleukin-10 (IL-10) in primary central nervous system diffuse large B cell lymphoma. J Neurooncol 124, 165–174 (2015). https://doi.org/10.1007/s11060-015-1843-9
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DOI: https://doi.org/10.1007/s11060-015-1843-9