Abstract
Soluble interleukin‐6 receptor (sIL‐6R) was found to be spontaneously released from human myeloma cell line U266 cells into culture supernatant, and was quantitatively measured with a fluorescence sandwich enzyme‐linked immunosorbent assay employing antibodies specific to IL‐6R. The supernatant IL‐6R was generated only from IL‐6R‐positive cell lines; myeloma cell lines RPMI8226 and RPMI1788, and myelomonocytic cell lines U937, THP‐1, and HL‐60. In contrast, it was not released from the IL‐6R‐negative cells; T cell line MoIt‐4 and Burkitt lympboma cell line Raji. SDS‐PAGE analysis of the soluble IL‐6R from U266 cells suggested a molecular weight of approximately 50‐55 kDa, 25–30 kDa smaller than the mature cell surface receptor. These results suggest that the generation of soluble IL‐6R may be a maker of myeloma cells and myelomonocytic cells.
Keywords: Key words, Human IL‐6 receptor, Soluble interleukin receptor, Recombinant soluble IL‐6 receptor, Interleukin‐6
Full Text
The Full Text of this article is available as a PDF (389.8 KB).
REFERENCES
- 1. ) Hirano , T. and Kishimoto , T.Interleukin‐6 (IL‐6) . Handb. Exp. Pharmacol , 86 , 633 – 665 ( 1991. ). [Google Scholar]
- 2. ) Zilberstein , A. , Ruggieri , R. , Korn , J. H. and Revel , M.Structure and expression of cDNA and genes for human interferon‐beta‐2, a distinct species by growth stimulatory cytokines . EMBO. J. , 5 , 2529 – 2537 ( 1986. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 3. ) May , L. T. , Helfgott , D. C. and Sehgal , P. B.Anti‐β‐interferon antibodies inhibit the increased expression of HLA‐B7 mRNA in tumor necrosis factor treated human fibroblasts: structural studies of the/32 interferon involved . Proc. Natl. Acad. Set. USA , 83 , 8957 – 8961 ( 1986. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 4. ) van Damme , J. , Opdenakker , G. , Simpson , R. G. , Rubira , M. R. , Cayphas , S. , Vink , A. , Billiau , A. and Scick , J. V.Identification of the human 26‐kDa protein, interferon β2 (IFN‐β2), as a B cell hybridoma/plasmacytoma growth factor induced by interleukin 1 and tumor necrosis factor . J. Exp. Med. , 165 , 914 – 919 ( 1987. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 5. ) Garman , R. D. , Jacobs , K. A. , Clark , S. C. and Raulet , D. H.B‐cell‐stimulatory factor (β2 interferon) functions as a second signal for interleukin 2 production by mature murine T cells . Proc. Natl. Acad. Sci. USA , 84 , 7629 – 7633 ( 1987. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 6. ) Lotz , M. , Jirik , F. , Kabouridis , R. , Tsoukas , T. , Hirano , T. , Kishimoto , T. and Carson , D. A.BSF‐2/IL‐6 is a costimulant for human thymocytes and T lymphocytes . J. Exp. Med. , 167 , 1253 – 1258 ( 1988. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 7. ) Takai , Y. , Wong , G. G. , Clark , S. C , Burakoff , S. J. and Herrman , S. H.B cell stimulatory factor‐2 is involved in the differentiation of cytotoxic T lymphocytes . J. Immunol. , 140 , 508 – 512 ( 1988. ). [PubMed] [Google Scholar]
- 8. ) Gauldie , J. , Richard , C , Harnish , D. , Lansdorp , P. and Baumann , H.Interferon /β2/B‐cell stimulatory factor type 2 shares identity with monocyte derived hepatocyte‐stimulating factor and regulates the major acute phase protein response in liver cells . Proc. Natl. Acad. Sci. USA , 86 , 7251 – 7255 ( 1987. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 9. ) Andus , T. , Geiger , T. , Hirano , T. , Northoff , H. , Ganter , U. , Bauer , J. , Kishimoto , T. and Heinrich , P. C.Recombinant human B cell stimulatory factor 2 (BSF‐2/ INF‐/β2) regulates β‐fibrinogen and albumin mRNA levels in Fao‐9 cells . FEBS Lett. , 221 , 18 – 22 ( 1987. ). [DOI] [PubMed] [Google Scholar]
- 10. ) Satoh , T. , Nakamura , S. , Taga , T. , Matsuda , T. , Hirano , T. , Kishimoto , T. and Kaziro , Y.Induction of neural differentiation in PC 12 cells by B cell stimulatory factor/ interleukin 6 . Mol. Cell. Biol. , 8 , 3546 – 3549 ( 1988. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 11. ) Ikebuchi , K. , Wong , G. G. , Clark , S. C , Ihle , J. N. , Hirai , Y. and Ogawa , M.Interleukin‐6 enhancement of inter‐leukin‐3‐dependent proliferation of multipotential hemopoietic progenitors . Proc. Natl. Acad. Sci. USA , 84 , 9035 – 9039 ( 1987. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 12. ) Taga , T. , Kawanishi , Y. , Hardy , R. R. , Hirano , T. , and Kishimoto , T.Receptors for B cell stimulatory factor 2. Quantitation, specificity, distribution, and regulation of expression . J. Exp. Med. , 166 , 967 – 981 ( 1987. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 13. ) Yamasaki , K. , Taga , T. , Hirata , Y. , Yawata , H. , Kawanishi , Y. , Seed , B. , Taniguchi , T. , Hirano , T. and Kishimoto , T.Cloning and expression of the human interleukin‐6 (BSF‐2/IFN‐/β2) receptor . Science , 241 , 825 – 828 ( 1988. ). [DOI] [PubMed] [Google Scholar]
- 14. ) Hirata , Y. , Taga , T. , Hibi , M. , Nakano , N. , Hirano , T. and Kishimoto , T.Characterization of IL‐6 receptor expression by monoclonal and polyclonal antibodies . Immunol. , 143 , 2900 – 2906 ( 1989. ). [PubMed] [Google Scholar]
- 15. ) Taga , T. , Hibi , M. , Hirata , Y. , Yasukawa , K. , Masuda , T. , Hirano , T. and Kishimoto , T.Interleukin‐6 triggers the association of its receptor with a possible signal transducer, gp130 . Cell , 58 , 573 – 581 ( 1989. ). [DOI] [PubMed] [Google Scholar]
- 16. ) Novick , D. , Engelmann , H. , Wallach , D. and Rubinstein , M.Soluble cytokine receptors are present in normal human urine . J. Exp. Med. , 170 , 1409 – 1414 ( 1989. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 17. ) Novick , D. , Engelmann , H. and Wallach , D.Purification of soluble cytokine receptors from normal human urine by ligand‐affinity and immunoaffinity chromatography . J. Chromatogr. , 510 , 331 – 337 ( 1990. ). [DOI] [PubMed] [Google Scholar]
- 18. ) Yasukawa , K. , Hirano , T. , Watanabe , Y. , Muratani , K. , Matsuda , T. , Nakai , S. and Kishimoto , T.Structure and expression of human B cell stimulatory factor‐2 (BSF‐2/ IL‐6) gene . EMBO J. , 6 , 2939 – 2945 ( 1987. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 19. ) Yasukawa , K. , Saito , T. , Fukunaga , T. , Sekimori , Y. , Koishihara , Y. , Fukui , H. , Osugi , Y. , Matsuda , T. , Yawata , H. , Hirano , T. , Taga , T. and Kishimoto , T.Purification and characterization of soluble human IL‐6 receptor expressed in CHO cell . J. Biochem. , 108 , 673 – 679 ( 1990. ). [DOI] [PubMed] [Google Scholar]
- 20. ) Honda , M. , Kitamura , K. , Matsuda , K. , Yokota , Y. , Yamamoto , N. , Mitsuyasu , R. , Chermann , J.‐C. and Tokunaga , T.Soluble IL‐2 receptor in AIDS: correlation of its serum level with the classification of HIV‐induced diseases and its characterization . Immunol. , 142 , 4248 – 4255 ( 1989. ). [PubMed] [Google Scholar]
- 21. ) Honda , M. , Nagao , S. , Yamamoto , N. , Tanaka , Y. , Tozawa , H. and Tokunaga , T.Fluorescence sandwich enzyme‐linked immunosorbent assay for detecting human interleukin‐2 receptors . J. Immunol. Methods , 110 , 129 – 136 ( 1988. ). [DOI] [PubMed] [Google Scholar]
- 22. ) Laemmli , U. K.Cleavage of structural proteins during the assembly of the head of bacteriophage T4 . Nature , 227 , 680 – 685 ( 1970. ). [DOI] [PubMed] [Google Scholar]
- 23. ) Saito , T. , Yasukawa , K. , Suzuki , H. , Futatsugi , K. , Fukunaga , T. , Yokomizo , C , Koishihara , Y. , Fukui , H. , Ohsugi , Y. , Yawata , H. , Hirano , T. , Taga , T. and Kishimoto , T.Preparation of soluble murine IL‐6 receptor and anti‐murine IL‐6 receptor antibodies . J. Immunol , 147 , 168 – 173 ( 1991. ). [PubMed] [Google Scholar]
- 24. ) Gavin , J. R. , Buell , D. N. and Roth , J.Water soluble insulin receptors from lymphocytes . Science , 178 , 168 – 189 ( 1972. ). [DOI] [PubMed] [Google Scholar]
- 25. ) Weber , W. , Gill , G. and Spiess , J.Production of an epidermal growth factor receptor‐related protein . Science , 224 , 294 – 297 ( 1984. ). [DOI] [PubMed] [Google Scholar]
- 26. ) Rubin , L. A. , Kurman , C. C , Fritz , M. E. , Biddison , W. E. , Boutin , B. , Yachoan , R. and Nelson , D. L.Soluble interleukin 2 receptors are released from activated human lymphoid cells in vitro . J. Immunol , 135 , 3172 – 3177 ( 1985. ). [PubMed] [Google Scholar]
- 27. ) Engelmann , H. , Aderka , D. , Rubinstein , M , Rotman , D. and Wallach , D.A tumor necrosis factor‐binding protein purified to homogeneity from human urine protects cells from tumor necrosis factor toxicity . J. Biol. Chem. , 264 , 11974 – 11980 ( 1989. ). [PubMed] [Google Scholar]
- 28. ) Olsson , I. , Lantz , M , Nilsson , E. , Peetre , C , Thysell , H. , Groubb , A. and Adolf , G.Isolation and characterization of a tumor necrosis factor binding protein from urine . Eur. J. Haematol , 42 , 270 – 278 ( 1989. ). [DOI] [PubMed] [Google Scholar]
- 29. ) Srckinger , P. , Isaaz , S. and Dayer , J.‐M.Purification and biologic characterization of a specific tumor necrosis factor alpha inhibitor . Biol. Chem. , 264 , 11966 – 11973 ( 1989. ). [PubMed] [Google Scholar]
- 30. ) Nakajima , T. , Sarfati , M. and Delespesse , G.Relationship between human IgE‐binding factor (IgE‐BF) and lymphocyte receptors for IgE . J. Immunol , 139 , 848 – 854 ( 1987. ). [PubMed] [Google Scholar]
- 31. ) Sarfati , M. , Bron , D. , Lagneaux , L. , Fonteyn , C , Frost , H. and Delespesse , G.Elevation of IgE‐binding factors in serum of patients with B cell‐derived chronic lymphocytic leukemia . Blood , 71 , 94 – 98 ( 1988. ). [PubMed] [Google Scholar]
- 32. ) Cosma , D. , Khoury , G. and Jay , G.Three classes of mouse H‐2 messenger RNA distinguished by analysis of cDNA clones . Nature , 295 , 73 – 76 ( 1982. ). [DOI] [PubMed] [Google Scholar]
- 33. ) Maloy , W. L. , Coligan , J. E. , Barra , Y. , and Jay , G.Detection of a secreted form of the murine H‐2 class I antigen with an antibody against its predicted carboxyl terminus . Proc. Natl Acad. Sci. USA , 81 , 1216 – 1220 ( 1984. ). [DOI] [PMC free article] [PubMed] [Google Scholar]
- 34. ) Sachs , D. H. , Kiszkiss , P. and Kim , K. J.Release of la antigens by a cultured B cell line . J. Immunol , 124 , 2130 – 2136 ( 1980. ). [PubMed] [Google Scholar]
- 35. ) Fujimoto , J. , Levy , S. and Levy , R.Spontaneous release of Leu‐2 (T8) molecule from human T cells . J. Exp. Med. , 158 , 752 – 766 ( 1983. ). [DOI] [PMC free article] [PubMed] [Google Scholar]