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Title:   Author  item
                                            Min, Wongiitem
                                            Lillehoj, Hyun
  Submitted to: Avian Immunology Group Meeting
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 5/1/2004
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: The common cytokine receptor gamma (gamma-c) chain is a shared component of the receptors for IL-2, -4, -7, -9, -15, and -21, and is a member of the cytokine receptor superfamily displaying a characteristic spacing of four conserved cysteine residues and a WSXWS motif.  The gamma-c chain is expressed as a transmembrane glycoprotein on CD4+ and CD8+ T cells, B cells, NK cells, monocytes/macrophages, neutrophils, and granulocytes where it forms heterodimeric or heterotrimeric complexes with specific interleukin receptors thereby augmenting ligand affinity, receptor internalization, and signal transduction.  In this study, we discovered that, unlike mammals, chickens possess two different gamma-c gene transcripts, chgamma-c-a and chgamma-c-b.  Sequence comparisons between the cDNAs and a gamma-c genomic clone isolated by PCR revealed that chgamma-c-b contained an in-frame 78 bp insertion between Gly-222 and Val-223 of the chgamma-c-a sequence.  This insertion most likely resulted from alternative mRNA splicing such that the 5th intron was not removed from the chgamma-c-b transcript.  Furthermore, while chgamma-c-a and chgamma-c-b transcripts were expressed equally in the spleen, thymus, bursa, and cecal tonsils, they were differentially expressed during the time course of Con A stimulation of splenic T lymphocytes.


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