Receptor for protons: First observations on Acid Sensing Ion Channels

Area of Science:

• Neuroscience
• Molecular Biology
• Physiology

Background:

• Acid-Sensing Ion Channels (ASICs) were first observed in 1980 as proton-gated sodium channels.
• Their cloning in 1996 marked a new era in understanding their ubiquitous presence in the mammalian nervous system.
• Initially proposed as nociceptors, their role in pain has been extensively validated.

Purpose of the Study:

• To provide a historical overview of ASIC research.
• To highlight the established and speculative functions of ASICs in the nervous system.
• To identify remaining fundamental questions in ASIC research.

Main Methods:

• Historical review of scientific literature.
• Synthesis of findings on ASIC discovery and characterization.
• Discussion of physiological and pathological roles.

Main Results:

• ASICs are a family of widely distributed ion channels in the nervous system.
• ASICs are confirmed mediators of pain signaling.
• ASICs are implicated in numerous other physiological and disease processes.

Conclusions:

• ASICs are essential transducers of pH changes into neural signals.
• Further research is needed to fully elucidate ASIC function in health and disease.
• Understanding ASICs is critical for advancing neuroscience and pain management.