Abstract
Acid-sensing ion channel 3 (ASIC3), a proton-gated ion channel of the degenerins/epithelial sodium channel (DEG/ENaC) receptor family is expressed predominantly in sensory neurons including nociceptive neurons responding to protons. To study the role of ASIC3 in pain signaling, we generated ASIC3 knockout mice. Mutant animals were healthy and responded normally to most sensory stimuli. However, in behavioral assays for pain responses, ASIC3 null mutant mice displayed a reduced latency to the onset of pain responses, or more pain-related behaviors, when stimuli of moderate to high intensity were used. This unexpected effect seemed independent of the modality of the stimulus and was observed in the acetic acid-induced writhing test (0.6 vs. 0.1-0.5%), in the hot-plate test (52.5 and 55 vs. 50 degrees C), and in tests for mechanically induced pain (tail-pinch vs. von Frey filaments). We postulate that ASIC3 is involved in modulating moderate- to high-intensity pain sensation.
MeSH Terms
Acid Sensing Ion Channels
Animals
Base Sequence
Behavior, Animal
DNA Primers
Membrane Proteins
Mice
Mice, Knockout
Nerve Tissue Proteins
Pain/physiopathology
Physical Stimulation
Sodium Channels/genetics,physiology
Chemicals
ASIC3 protein, human
Acid Sensing Ion Channels
DNA Primers
Membrane Proteins
Nerve Tissue Proteins
Sodium Channels
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
Chen Chih-Cheng
Laboratory of Genetics, National Institute of Mental Health, 36 Convent Drive 3D06, Bethesda, MD 20892, USA.
Zimmer Anne
Sun Wei-Hsin
Hall Jennifer
Brownstein Michael J
Zimmer Andreas
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