PMID- 17458859 OWN - NLM STAT- MEDLINE DCOM- 20070911 LR - 20171116 IS - 0014-2980 (Print) IS - 0014-2980 (Linking) VI - 37 IP - 6 DP - 2007 Jun TI - Erythropoietin enhances immune responses in mice. PG - 1584-93 AB - Erythropoietin (Epo) is the main erythropoietic hormone. Recombinant human Epo (rHuEpo) is thus used in clinical practice for the treatment of anemia. Accumulating data reveals that Epo exerts pleiotropic activities. We have previously shown an anti-neoplastic activity of Epo in murine multiple myeloma (MM) models, and in MM patients. Our findings that this anti-neoplastic effect operates via CD8+ T lymphocytes led us to hypothesize that Epo possesses a wider range of immunomodulatory functions. Here we demonstrate the effect of Epo on B lymphocyte responses, focusing on three experimental models: (i) tumor-bearing mice, (5T2 MM mouse); (ii) antigen-injected healthy mice; and (iii) antigen-injected transgenic mice (tg6), overexpressing human Epo. In the MM model, despite bone marrow dysfunction, Epo-treated mice retained higher levels of endogenous polyclonal immunoglobulins, compared to their untreated controls. In both Epo-treated wild type and tg6 mice, Epo effect was manifested in the higher levels of splenocyte proliferative response induced in vitro by lipopolysaccharide. Furthermore, these mice had increased in vivo production of anti-dinitrophenyl (DNP) antibodies following immunization with DNP-keyhole limpet hemocyanin. Epo-treated mice showed an enhanced immune response also to the clinically relevant hepatitis B surface antigen. These findings suggest a potential novel use of rHuEpo as an immunomodulator. FAU - Katz, Odelia AU - Katz O AD - Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel. FAU - Gil, Lidor AU - Gil L FAU - Lifshitz, Lilach AU - Lifshitz L FAU - Prutchi-Sagiv, Sara AU - Prutchi-Sagiv S FAU - Gassmann, Max AU - Gassmann M FAU - Mittelman, Moshe AU - Mittelman M FAU - Neumann, Drorit AU - Neumann D LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Eur J Immunol JT - European journal of immunology JID - 1273201 RN - 0 (2,4-dinitrophenyl keyhole limpet hemocyanin) RN - 0 (Adjuvants, Immunologic) RN - 0 (Antibodies, Monoclonal) RN - 0 (CD3 Complex) RN - 0 (Hepatitis B Surface Antigens) RN - 0 (Immunoglobulin G) RN - 0 (Immunoglobulin gamma-Chains) RN - 0 (Immunoglobulin kappa-Chains) RN - 0 (Lipopolysaccharides) RN - 0 (Recombinant Proteins) RN - 11096-26-7 (Erythropoietin) RN - 9013-72-3 (Hemocyanins) SB - IM CIN - Eur J Immunol. 2007 Jun;37(6):1427-30. PMID: 17506033 MH - Adjuvants, Immunologic/genetics/*pharmacology MH - Animals MH - Antibodies, Monoclonal/immunology/pharmacology MH - Antibody Formation/*drug effects/immunology MH - B-Lymphocytes/cytology/drug effects/immunology MH - CD3 Complex/immunology MH - Cell Proliferation/drug effects MH - Erythropoietin/genetics/*pharmacology/therapeutic use MH - Female MH - Hemocyanins/immunology MH - Hepatitis B Surface Antigens/immunology MH - Humans MH - Immunoglobulin G/blood MH - Immunoglobulin gamma-Chains/blood MH - Immunoglobulin kappa-Chains/blood MH - Lipopolysaccharides/pharmacology MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Mice, Transgenic MH - Multiple Myeloma/blood/drug therapy MH - Recombinant Proteins/pharmacology/therapeutic use MH - Survival Analysis MH - T-Lymphocytes/cytology/drug effects/immunology MH - Vaccination EDAT- 2007/04/27 09:00 MHDA- 2007/09/12 09:00 CRDT- 2007/04/27 09:00 PHST- 2007/04/27 09:00 [pubmed] PHST- 2007/09/12 09:00 [medline] PHST- 2007/04/27 09:00 [entrez] AID - 10.1002/eji.200637025 [doi] PST - ppublish SO - Eur J Immunol. 2007 Jun;37(6):1584-93. doi: 10.1002/eji.200637025.