Myo-inositol-dependent neuronal signaling pathway

The "Myo-inositol-dependent neuronal signaling pathway" is not a single molecular target such as a receptor, enzyme, or transporter. Instead, it refers to a broad cellular process involving the use of myo-inositol—a sugar alcohol that serves as the structural basis for various secondary messengers and phosphoinositides essential for eukaryotic cell function[2][5]. In neurons, myo-inositol is critical for synthesizing phosphoinositides that regulate growth cone development and synaptic activity. Neurons acquire myo-inositol primarily through uptake from the extracellular environment using specific transporters such as SMIT1/SMIT2 (Na+-dependent) and HMIT/SLC2A13 (H+-dependent), which are regulated by factors like osmolarity and cell depolarization[1]. Within cells, myo-inositol is incorporated into key molecules like phosphatidylinositol and its phosphorylated derivatives—these act as precursors to important second messengers including inositol trisphosphate (IP3), which mediates calcium release from intracellular stores upon activation by upstream signals[4]. The overall pathway encompasses multiple enzymes, transporters, receptors (such as the IP3 receptor), and regulatory mechanisms rather than being attributable to one discrete druggable target. Because this entry describes an entire biochemical pathway rather than an individual protein or molecular entity typically considered a therapeutic target, it should be flagged as incorrect for structured drug-target databases seeking canonical targets.

Other names

Myo-inositol signalingInositol phosphate signalingInositol-dependent signal transduction