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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zelman-Toister, Einat Maharshak, Nitsan Binsky-Ehrenreich, Inbal Shachar, Idit Harroch, Sheila Gordin, Maya Hazan-Halevy, Inbal Herishanu, Yair Bucala, Richard Haran, Michal Shvidel, Lev Cohen, Sivan Shoshana, Or-yam Leng, Lin |
| Description | Country affiliation: Israel Author Affiliation: Cohen S ( Department of Immunology, Weizmann Institute of Science, Rehovot, Israel) |
| Abstract | Lasting B cell persistence depends on survival signals that are transduced by cell surface receptors. In this study, we describe a novel biological mechanism essential for survival and homeostasis of normal peripheral mature B cells and chronic lymphocytic leukemia cells, regulated by the heparin-binding cytokine, midkine (MK), and its proteoglycan receptor, the receptor-type tyrosine phosphatase ζ (RPTPζ). We demonstrate that MK initiates a signaling cascade leading to B cell survival by binding to RPTPζ. In mice lacking PTPRZ, the proportion and number of the mature B cell population are reduced. Our results emphasize a unique and critical function for MK signaling in the previously described MIF/CD74-induced survival pathway. Stimulation of CD74 with MIF leads to c-Met activation, resulting in elevation of MK expression in both normal mouse splenic B and chronic lymphocytic leukemia cells. Our results indicate that MK and RPTPζ are important regulators of the B cell repertoire. These findings could pave the way toward understanding the mechanisms shaping B cell survival and suggest novel therapeutic strategies based on the blockade of the MK/RPTPζ-dependent survival pathway. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1101468 |
| Journal | The Journal of Immunology |
| Issue Number | 1 |
| Volume Number | 188 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2012-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antigens, Differentiation, B-lymphocyte Immunology B-lymphocytes Cytokines Histocompatibility Antigens Class Ii Membrane Glycoproteins Receptor-like Protein Tyrosine Phosphatases, Class 2 Receptors, Growth Factor Signal Transduction Animals Genetics Metabolism Cell Line, Tumor Cell Survival Gene Expression Regulation Mice Mice, Knockout Proto-oncogene Proteins C-met Spleen Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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