Abstract
The impact of interleukin (IL)-1beta on tumor necrosis factor alpha-induced adipose-related protein (TIARP)/six-transmembrane protein of prostate 2 (STAMP2) was determined in adipocytes. TIARP/STAMP2 mRNA synthesis was significantly stimulated by IL-1beta in a dose- and time-dependent fashion in 3T3-L1 adipocytes. Signaling studies suggested that janus kinase 2, nuclear factor kappaB, and p44/42 mitogen-activated protein kinase are involved in IL-1beta-induced TIARP/STAMP2 mRNA expression. Furthermore, IL-1beta, TNFalpha, and IL-6 showed synergistic stimulatory effects on TIARP/STAMP2 gene expression. Moreover, both TIARP/STAMP2 mRNA synthesis and protein expression were induced by IL-1beta in fully differentiated human mesenchymal stem cell-derived adipocytes (hMSC-Ad). Taken together, TIARP/STAMP2 is highly upregulated in 3T3-L1 cells and hMSC-Ad by IL-1beta and might, therefore, modulate proinflammatory and insulin resistance-inducing effects of IL-1beta.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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3T3-L1 Cells
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Adipocytes / cytology
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Adipocytes / metabolism*
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Animals
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Cell Differentiation / drug effects
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Cell Differentiation / physiology
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Dose-Response Relationship, Drug
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Drug Synergism
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Gene Expression Regulation / drug effects*
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Gene Expression Regulation / physiology
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Humans
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Insulin Resistance / physiology
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Interleukin-1beta / agonists
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Interleukin-1beta / pharmacology*
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Interleukin-6 / agonists
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Interleukin-6 / pharmacology
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Janus Kinase 2 / metabolism
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Membrane Proteins / biosynthesis*
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Mesenchymal Stem Cells / cytology
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Mesenchymal Stem Cells / metabolism
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Mice
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Mitogen-Activated Protein Kinase 1 / metabolism
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NF-kappa B / metabolism
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Oxidoreductases / biosynthesis*
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RNA, Messenger / biosynthesis
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Tumor Necrosis Factor-alpha / agonists
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Tumor Necrosis Factor-alpha / pharmacology
Substances
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IL6 protein, human
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Interleukin-1beta
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Interleukin-6
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Membrane Proteins
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NF-kappa B
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RNA, Messenger
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Tiarp protein, mouse
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Tumor Necrosis Factor-alpha
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Oxidoreductases
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STEAP4 protein, human
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JAK2 protein, human
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Jak2 protein, mouse
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Janus Kinase 2
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Mitogen-Activated Protein Kinase 1