摘要

Phosphoinositides are critical regulators in cell biology. Phosphatidylinositol 4,5-bisphosphate, also known as PI(4,5)P-2 or PIP2, was the first variety of phosphoinositide to enter in the T cell signaling scene. Phosphatidylinositol bis-phosphates are the substrates for different types of enzymes such as phospholipases C (beta and gamma isoforms) and phosphoinositide 3-kinases (PI3K class IA and IB) that are largely involved in signal transduction. However until recently, only a few studies highlighted phosphatidylinositol monophosphates as signaling molecules. This was mostly due to the difficulty of detection of some of these phosphoinositides, such as phosphatidylinositol 5-phosphate, also known as Pl5P. Some compelling evidence argues for a role of Pl5P in cell signaling and/or cell trafficking. Recently, we reported the detection of a Pl5P increase upon TCR triggering. Here, we describe the current knowledge of the role of Pl5P in T cell signaling. The future challenges that will be important to achieve in order to fully characterize the role of Pl5P in T cell biology, will be discussed.

  • 出版日期2013