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Construction of a fluorescein‐responsive chimeric receptor with strict ligand dependency
Author(s) -
Liu Wenhai,
Kawahara Masahiro,
Ueda Hiroshi,
Nagamune Teruyuki
Publication year - 2008
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.21961
Subject(s) - erythropoietin receptor , cytokine receptor , glycoprotein 130 , microbiology and biotechnology , receptor , biology , chimera (genetics) , chimeric antigen receptor , cytokine , fusion protein , chemistry , signal transduction , biochemistry , immunology , recombinant dna , t cell , immune system , gene , stat3
Since many cell functions are regulated by members of the cytokine receptor superfamily, the artificial mimicry of the cytokine receptor system would be attractive for cellular engineering. We previously showed that an antibody/cytokine receptor chimera can transduce a growth signal in response to non‐natural ligands, such as fluorescein‐conjugated BSA. However, considerable background of cell proliferation was observed without antigen. Therefore, we redesigned chimeric receptor constructs with different combinations of domains containing anti‐fluorescein single chain Fv (ScFv), extracellular D1/D2 as well as transmembrane domains of erythropoietin receptor (EpoR), and the intracellular domain of glycoprotein 130 (gp130), to obtain strictly fluorescein‐dependent chimeric receptors. When interleukin‐3‐dependent Ba/F3 cells were transduced with retroviral vectors encoding individual chimeric receptors, the chimeras either with both D1 and D2 domains or without any EpoR extracellular domain attained a strict ligand‐dependent ON/OFF regulation. Biotechnol. Bioeng. © 2008 Wiley Periodicals, Inc.