Phosphoinositide 3-kinase enhancer (PIKE) in the brain: is it simply a phosphoinositide 3-kinase/Akt enhancer?

• Authors: Chi Bun Chan, Emory University; Keqiang Ye, Emory University
• Journal Title: Reviews in the Neurosciences
• Volume: Volume 23, Number 2
• Publisher: De Gruyter | 2012-01-26, Pages 153-161
• Type of Work: Article | Post-print: After Peer Review
• Publisher DOI: http://doi.org/10.1515/revneuro-2011-0066
• Subjects: Health Sciences, Pathology; Health Sciences, Medicine and Surgery
• Keywords: Akt; GTPase; neuron; PI3K; PIKE

Abstract

Since its discovery in 2000, phosphoinositide 3-kinase enhancer (PIKE) has been recognized as a class of GTPase that controls the enzymatic activities of phosphoinositide 3-kinase (PI3K) and Akt in the central nervous system (CNS). However, recent studies suggest that PIKEs are not only enhancers to PI3K/Akt but also modulators to other kinases including insulin receptor tyrosine kinase and focal adhesion kinases. Moreover, they regulate transcription factors such as signal transducer and activator of transcription and nuclear factor κB. Indeed, PIKE proteins participate in multiple cellular processes including control of cell survival, brain development, memory formation, gene transcription, and metabolism. In this review, we have summarized the functions of PIKE proteins in CNS and discussed their potential implications in various neurological disorders.