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  • Interleukins 19, 20, and 24 signal through two distinct receptor complexes Differences in receptor-ligand interactions mediate unique biological functions
  • Parrish-Novak J; Xu W; Brender T; Yao L; Jones C; West J; Brandt C; Jelinek L; Madden K; McKernan PA; Foster DC; Jaspers S; Chandrasekher YA
  • J Biol Chem 2002[Dec]; 277 (49): 47517-23
  • Cytokines that signal through Class II receptors form a distinct family that includes the interferons and interleukin 10 (IL-10). Recent identification of several IL-10 homologs has defined a cytokine subfamily that includes AK155, IL-19, IL-20, IL-22, and IL-24. Within this subfamily, IL-19, IL-20, and IL-24 exhibit substantial sharing of receptor complexes; all three are capable of signaling through IL-20RA/IL-20RB, and IL-20 and IL-24 both can also use IL-22R/IL-20RB. However, the biological effects of these three cytokines appear quite distinct: immune activity with IL-19, skin biology with IL-20, and tumor apoptosis with IL-24. To more fully elucidate their interactions with the receptor complexes, we have performed a series of in vitro assays. Reporter, proliferation, and direct STAT activation assays using cell lines expressing transfected receptors revealed differences between the receptor complexes. IL-19 and IL-24 also exhibited growth inhibition on a cell line endogenously expressing all three receptor subunits, an effect that was seen at cytokine levels two orders of magnitude above those required for STAT activation or proliferation. These results demonstrate that, although this subclass exhibits receptor complex redundancy, there are differences in ligand/receptor interactions and in signal transduction that may lead to specificity and a distinct biology for each cytokine.
  • |*Signal Transduction[MESH]
  • |Cell Division[MESH]
  • |Cell Line[MESH]
  • |Cytokines/metabolism[MESH]
  • |Dose-Response Relationship, Drug[MESH]
  • |Genes, Reporter[MESH]
  • |Genes, Tumor Suppressor[MESH]
  • |Humans[MESH]
  • |In Situ Hybridization[MESH]
  • |Interleukin-10/*chemistry/metabolism[MESH]
  • |Interleukins/*chemistry/metabolism[MESH]
  • |Ligands[MESH]
  • |Luciferases/metabolism[MESH]
  • |Lung/pathology[MESH]
  • |Protein Binding[MESH]
  • |Protein Transport[MESH]
  • |Reverse Transcriptase Polymerase Chain Reaction[MESH]
  • |Thymidine/chemistry[MESH]
  • |Tissue Distribution[MESH]
  • |Transfection[MESH]
  • |Tumor Cells, Cultured[MESH]





  • *{{pmid12351624}}
    *<b>[http://www.kidney.de/mlpefetch.php?search=12351624 Interleukins 19, 20, and 24 signal through two distinct receptor complexes Differences in receptor-ligand interactions mediate unique biological functions ]</b> J Biol Chem 2002; 277(49) ; 47517-23 Parrish-Novak J; Xu W; Brender T; Yao L; Jones C; West J; Brandt C; Jelinek L; Madden K; McKernan PA; Foster DC; Jaspers S; Chandrasekher YA

        *12351624*

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    J Biol Chem

    47517 49.277 2002