Identification of tocopherol-associated protein as an activin/TGF-β-inducible gene in mast cells

Masayuki Funaba, Masaru Murakami, Teruo Ikeda, Kenji Ogawa, Kunihiro Tsuchida, Hiromu Sugino

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Previous studies have demonstrated that treatment with activin A and TGF-β1, members of the TGF-β family, stimulated maturation of mouse bone marrow-derived cultured mast cells (BMMC), which was characterized by morphology and gene expression of mouse mast cell proteases (mmcps). In order to gain a better understanding of activin A- and TGF-β1-induced maturation in mast cells, we investigated the genes that were up-regulated in response to treatment with these two members of the TGF-β family. The cDNA microarray analyses indicated that in BMMC, five genes were induced by treatment with 4 nM activin A for 2 h. Tocopherol-associated protein (Tap) was one of the induced genes, and the Tap induction in response to activin A treatment was confirmed by real-time RT-PCR analyses. Treatment with TGF-β1 at 200 pM but not BMP-2 at 4 nM also increased Tap gene transcript in BMMC. Activin A-induced Tap expression was detected in BMMC but not in RAW264 macrophage-like cells, B16 melanoma cells or P19 embryonic carcinoma cells. Treatment with > 1 μM SB431542, an inhibitor of activin and TGF-β type I receptors ALK4/5, reduced responsiveness of Tap expression to TGF-β1, whereas < 0.5 μM SB431542 effectively reduced TGF-β1-induced expression of mmcp-1 and mmcp-7. These results suggest that inhibitory effects of SB431542 are different between TGF-β-induced genes. Reporter assays indicated that Tap expression enhances transcription mediated by the activin/TGF-β pathway. Thus, the present results suggest that Tap induction in response to activin/TGF-β occurs predominantly in mast cells and serves as a positive regulator in activin/TGF-β signaling.

Original languageEnglish
Pages (from-to)900-906
Number of pages7
JournalBiochimica et Biophysica Acta - Molecular Cell Research
Volume1763
Issue number8
DOIs
Publication statusPublished - 01-08-2006

Fingerprint

Activins
Tocopherols
Mast Cells
Cultured Cells
Genes
Bone Marrow
Proteins
Type I Activin Receptors
Experimental Melanomas
Microarray Analysis
Oligonucleotide Array Sequence Analysis
Real-Time Polymerase Chain Reaction
Peptide Hydrolases
Macrophages
activin A
Carcinoma
Gene Expression

All Science Journal Classification (ASJC) codes

  • Cell Biology
  • Molecular Biology
  • Biophysics

Cite this

Funaba, Masayuki ; Murakami, Masaru ; Ikeda, Teruo ; Ogawa, Kenji ; Tsuchida, Kunihiro ; Sugino, Hiromu. / Identification of tocopherol-associated protein as an activin/TGF-β-inducible gene in mast cells. In: Biochimica et Biophysica Acta - Molecular Cell Research. 2006 ; Vol. 1763, No. 8. pp. 900-906.
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Identification of tocopherol-associated protein as an activin/TGF-β-inducible gene in mast cells. / Funaba, Masayuki; Murakami, Masaru; Ikeda, Teruo; Ogawa, Kenji; Tsuchida, Kunihiro; Sugino, Hiromu.

In: Biochimica et Biophysica Acta - Molecular Cell Research, Vol. 1763, No. 8, 01.08.2006, p. 900-906.

Research output: Contribution to journalArticle

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AB - Previous studies have demonstrated that treatment with activin A and TGF-β1, members of the TGF-β family, stimulated maturation of mouse bone marrow-derived cultured mast cells (BMMC), which was characterized by morphology and gene expression of mouse mast cell proteases (mmcps). In order to gain a better understanding of activin A- and TGF-β1-induced maturation in mast cells, we investigated the genes that were up-regulated in response to treatment with these two members of the TGF-β family. The cDNA microarray analyses indicated that in BMMC, five genes were induced by treatment with 4 nM activin A for 2 h. Tocopherol-associated protein (Tap) was one of the induced genes, and the Tap induction in response to activin A treatment was confirmed by real-time RT-PCR analyses. Treatment with TGF-β1 at 200 pM but not BMP-2 at 4 nM also increased Tap gene transcript in BMMC. Activin A-induced Tap expression was detected in BMMC but not in RAW264 macrophage-like cells, B16 melanoma cells or P19 embryonic carcinoma cells. Treatment with > 1 μM SB431542, an inhibitor of activin and TGF-β type I receptors ALK4/5, reduced responsiveness of Tap expression to TGF-β1, whereas < 0.5 μM SB431542 effectively reduced TGF-β1-induced expression of mmcp-1 and mmcp-7. These results suggest that inhibitory effects of SB431542 are different between TGF-β-induced genes. Reporter assays indicated that Tap expression enhances transcription mediated by the activin/TGF-β pathway. Thus, the present results suggest that Tap induction in response to activin/TGF-β occurs predominantly in mast cells and serves as a positive regulator in activin/TGF-β signaling.

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