[Calcium-permeable cation channel activated by growth factors]

Area of Science:

• Cell Biology
• Molecular Biology
• Physiology

Context:

• Calcium ions (Ca2+) are essential for cell cycle progression.
• Growth factors stimulate G1 phase progression by activating calcium-permeable cation channels.
• Inhibition of these channels abrogates growth factor signaling.
• The molecular identity of these crucial channels remains largely unknown.

Purpose:

• To elucidate the molecular nature of growth factor-regulated calcium channels.
• To identify novel components involved in calcium signaling pathways.

Summary:

• Growth factors promote cell cycle progression, particularly G1 phase, through the activation of calcium-permeable cation channels.
• This activation leads to a sustained increase in intracellular calcium.
• The recent identification of the primary structure of GRC-1, a novel growth factor-regulated channel, provides a molecular target for further investigation.

Impact:

• Provides the molecular basis for understanding how growth factors regulate calcium influx.
• Opens new avenues for therapeutic interventions targeting cell cycle control.
• Enhances knowledge of calcium signaling in cell proliferation and development.