P53-and mevalonate pathway-driven malignancies require Arf6 for metastasis and drug resistance

• Hashimoto, Ari

• Oikawa, Tsukasa

• Hashimoto, Shigeru

• Sugino, Hirokazu

• Yoshikawa, Ayumu

• Otsuka, Yutaro

• Handa, Haruka

• Onodera, Yasuhito

• Nam, Jin-Min

• Oneyama, Chitose

• Okada, Masato

• Fukuda, Mitsunori

• Sabe, Hisataka

抄録

Drug resistance, metastasis, and a mesenchymal transcriptional program are central features of aggressive breast tumors. The GTPase Arf6, often overexpressed in tumors, is critical to promote epithelial mesenchymal transition and invasiveness. The metabolic mevalonate pathway (MVP) is associated with tumor invasiveness and known to prenylate proteins, but which prenylated proteins are critical for MVP-driven cancers is unknown. We show here that MVP requires the Arf6-dependent mesenchymal program. The MVP enzyme geranylgeranyl transferase II (GGT-II) and its substrate Rab11b are critical for Arf6 trafficking to the plasma membrane, where it is activated by receptor tyrosine kinases. Consistently, mutant p53, which is known to support tumorigenesis via MVP, promotes Arf6 activation via GGT-II and Rab11b. Inhibition of MVP and GGT-II blocked invasion and metastasis and reduced cancer cell resistance against chemotherapy agents, but only in cells overexpressing Arf6 and components of the mesenchymal program. Overexpression of Arf6 and mesenchymal proteins as well as enhanced MVP activity correlated with poor patient survival. These results provide insights into the molecular basis of MVP-driven malignancy.

収録刊行物

• Journal of cell biology

  Journal of cell biology 213 (1), 81-95, 2016-04-11

  Rockefeller University Press

詳細情報

• CRID: 1050282813997212928
• NII論文ID: 120005763128
• NII書誌ID: AA00694812
• HANDLE: 2115/62128
• ISSN: 00219525
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles