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Quantitative Proteomics Reveals GIMAP Family Proteins 1 and 4 to Be Differentially Regulated during Human T Helper Cell Differentiation

Ahlfors H; Filen S; Kouvonen P; Bjorkman M; West A; Tuomela S; Filen JJ; Rasool O; Nyman TA; Moulder R; Kantola S; Lahesmaa R; Katajamaa M

Quantitative Proteomics Reveals GIMAP Family Proteins 1 and 4 to Be Differentially Regulated during Human T Helper Cell Differentiation

Ahlfors H
Filen S
Kouvonen P
Bjorkman M
West A
Tuomela S
Filen JJ
Rasool O
Nyman TA
Moulder R
Kantola S
Lahesmaa R
Katajamaa M
Katso/Avaa
Mol Cell Proteomics-2009-Filén-32-44.pdf (659.0Kb)
Lataukset: 

AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
doi:10.1074/mcp.M800139-MCP200
URI
http://www.mcponline.org/content/8/1/32.full.pdf+html
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Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042714098
Tiivistelmä
T helper (Th) cells differentiate into functionally distinct effector cell subsets of which Th1 and Th2 cells are best characterized. Besides T cell receptor signaling, IL-12-induced STAT4 and T-bet- and IL-4-induced STAT6 and GATA3 signaling pathways are the major players regulating the Th1 and Th2 differentiation process, respectively. However, there are likely to be other yet unknown factors or pathways involved. In this study we used quantitative proteomics exploiting cleavable ICAT labeling and LC-MS/MS to identify IL-4-regulated proteins from the microsomal fractions of CD4(+) cells extracted from umbilical cord blood. We were able to identify 557 proteins of which 304 were also quantified. This study resulted in the identification of the down-regulation of small GTPases GIMAP1 and GIMAP4 by IL-4 during Th2 differentiation. We also showed that both GIMAP1 and GIMAP4 genes are up-regulated by IL-12 and other Th1 differentiation-inducing cytokines in cells induced to differentiate toward Th1 lineage and down-regulated by IL-4 in cells induced to Th2. Our results indicate that the GIMAP (GTPase of the immunity-associated protein) family of proteins is differentially regulated during Th cell differentiation. Molecular & Cellular Proteomics 8:32-44, 2009.
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