Inhibition of Akt induces significant downregulation of survivin and cytotoxicity in human multiple myeloma cells

Teru Hideshima, Laurence Catley, Noopur Raje, Dharminder Chauhan, Klaus Podar, Constantine Mitsiades, Yu Tzu Tai, Sonia Vallet, Tanyel Kiziltepe, Enrique Ocio, Hiroshi Ikeda, Yutaka Okawa, Hiromasa Hideshima, Nikhil C. Munshi, Hiroshi Yasui, Paul G. Richardson, Kenneth C. Anderson*

*Corresponding author for this work

Research output: Journal article (peer-reviewed)Journal article

100 Citations (Scopus)


Akt mediates growth and drug resistance in multiple myeloma (MM) cells in the bone marrow (BM) microenvironment. We have shown that a novel Akt inhibitor Perifosine induces significant cytotoxicity in MM cells in the BM milieu. This study further delineated molecular mechanisms whereby Perifosine triggered cytotoxicity in MM cells. Neither the intensity of Jun NH2-terminal kinase phosphorylation nor caspase/poly (ADP-ribose) polymerase cleavage correlated with Perifosine-induced cytotoxicity in MM.1S, INA6, OPM1 and OPM2 MM cells. However, survivin, which regulates caspase-3 activity, was markedly downregulated by Perifosine treatment, without changes in other anti-apoptotic proteins. Downregulation of survivin by siRNA significantly inhibited OPM1 MM cell growth, confirming that survivin mediates MM cell survival. Perifosine significantly downregulated both function and protein expression of β-catenin. Co-culture with BM stromal cells (BMSCs) upregulated both β-catenin and survivin expression in MM cells, which was blocked by Perifosine. Importantly, Perifosine treatment also downregulated survivin expression in human MM cells grown in vivo in a severe combined immunodeficient mouse xenograft model. Finally, Perifosine inhibited bortezomib-induced upregulation of survivin, associated with enhanced cytotoxicity of combined bortezomib and Perifosine treatment. These preclinical studies provide the framework for clinical trials of bortezomib with Perifosine to improve patient outcome in MM.

Original languageEnglish
Pages (from-to)783-791
Number of pages9
JournalBritish Journal of Haematology
Issue number6
Publication statusPublished - Sept 2007
Externally publishedYes


  • β-catenin
  • Akt
  • Multiple myeloma
  • Perifosine
  • Survivin

ASJC Scopus subject areas

  • Hematology


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