High-performance affinity purification for identification of 15-deoxy-Δ12,14-PGJ2 interacting factors using magnetic nanobeads

Naoya Maekawa, Masaki Hiramoto, Satoshi Sakamoto, Motoki Azuma, Takumi Ito, Marie Ikeda, Michitaka Naitou, Hukum P. Acharya, Yuichi Kobayashi, Makoto Suematsu, Hiroshi Handa, Takeshi Imai

研究成果: Article査読

6 被引用数 (Scopus)


Prostaglandin J2 (PGJ2) family have been reported to show various kinds of biological activities. Considerable progress has been made toward understanding the mechanism of adipogenesis, however, the mechanisms of other actions of PGJ2 family remain controversial. The 15-deoxy-Δ12,14-PGJ2 (15d-PGJ2) is one of the members of PGJ2 family, and is known as a ligand for peroxisome proliferator-activated receptor γ (PPARγ), which promotes the expression of the crucial genes for adipogenesis. In this study, we found that 15d-PGJ2 did not stimulate PPARγ-mediated gene expression in HEK293 cells whereas 15d-PGJ2 transactivated PPARγ-dependent transcription in other cell lines. Moreover, we confirmed that 15d-PGJ2 suppressed the growth of HEK293 cells. These observations suggest that 15d-PGJ2 shows another biological activity e.g. growth inhibition in HEK293 cells via unknown receptor for 15d-PGJ2. The aim of this study is to develop and validate effective purification system for PGJ2 interacting factors (PGJIFs). We have recently developed high performance magnetic nanobeads. In this study, we have newly developed 15d-PGJ2-immobilized beads by conjugating 15d-PGJ2 to the surface of these nanobeads. Firstly, we showed that PPARγ specifically bound to 15d-PGJ2-immobilized beads. Secondly, we newly identified voltage dependent anionic channel 1 (VDAC1) as new PGJIF from crude extracts of HEK293 cells using this affinity purification system. These data presented here demonstrate that 15d-PGJ2-immobilized beads are effective tool for purification of PGJIFs directly from crude cell extracts.

ジャーナルBiomedical Chromatography
出版ステータスPublished - 2011 4月

ASJC Scopus subject areas

  • 創薬
  • 分析化学
  • 分子生物学
  • 生化学
  • 臨床生化学
  • 薬理学


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