Journal article
Role of ASIC3 in the primary and secondary hyperalgesia produced by joint inflammation in mice
Pain (Amsterdam), Vol.137(3), pp.662-669
03/14/2008
DOI: 10.1016/j.pain.2008.01.020
PMCID: PMC2756650
PMID: 18343037
Abstract
The acid sensing ion channel 3 (ASIC3) is critical for the development of secondary hyperalgesia as measured by mechanical stimulation of the paw following muscle insult. We designed experiments to test whether ASIC3 was necessary for the development of both primary and secondary mechanical hyperalgesia that develops after joint inflammation. We used ASIC3 -/- mice and examined the primary (response to tweezers) and secondary hyperalgesia (von Frey filaments) that develops after joint inflammation comparing to ASIC3 +/+ mice. We also examined the localization of ASIC3 to the knee joint afferents innervating the joint capsule using immunohistochemical techniques before and after joint inflammation. We show that secondary mechanical hyperalgesia does not develop in ASIC3 -/- mice. However, the primary mechanical hyperalgesia of the inflamed knee joint still develops in ASIC3 -/- mice and is similar to ASIC3 +/+ mice. In knee joint synovium from ASIC3 +/+ mice without joint inflammation, ASIC3 was not localized to joint afferents that were stained with an antibodies to protein gene product (PGP) 9.5 or calcitonin gene-related peptide (CGRP). ASIC3 was found, however, in synoviocytes of the knee joint of uninflamed mice. In ASIC3 +/+ mice with joint inflammation, ASIC3 co-localized with PGP 9.5 or CGRP in joint afferents innervating the synovium. We conclude that the decreased pH that occurs after inflammation would activate ASIC3 on primary afferent fibers innervating joint, increasing the input to the spinal cord resulting in central sensitization manifested behaviorally as secondary hyperalgesia of the paw.
Details
- Title: Subtitle
- Role of ASIC3 in the primary and secondary hyperalgesia produced by joint inflammation in mice
- Creators
- M IkeuchiS J KolkerLa BurnesRy WalderK A Sluka
- Resource Type
- Journal article
- Publication Details
- Pain (Amsterdam), Vol.137(3), pp.662-669
- DOI
- 10.1016/j.pain.2008.01.020
- PMID
- 18343037
- PMCID
- PMC2756650
- NLM abbreviation
- Pain
- ISSN
- 0304-3959
- eISSN
- 1872-6623
- Language
- English
- Date published
- 03/14/2008
- Academic Unit
- Iowa Neuroscience Institute; Nursing; Anesthesia; Physical Therapy and Rehabilitation Science; Neuroscience and Pharmacology
- Record Identifier
- 9984040357502771
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