RGD Reference Report - NOV/CCN3 attenuates inflammatory pain through regulation of matrix metalloproteinases-2 and -9. - Rat Genome Database

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NOV/CCN3 attenuates inflammatory pain through regulation of matrix metalloproteinases-2 and -9.

Authors: Kular, L  Rivat, C  Lelongt, B  Calmel, C  Laurent, M  Pohl, M  Kitabgi, P  Melik-Parsadaniantz, S  Martinerie, C 
Citation: Kular L, etal., J Neuroinflammation. 2012 Feb 21;9:36. doi: 10.1186/1742-2094-9-36.
RGD ID: 10400878
Pubmed: PMID:22353423   (View Abstract at PubMed)
PMCID: PMC3332238   (View Article at PubMed Central)
DOI: DOI:10.1186/1742-2094-9-36   (Journal Full-text)

BACKGROUND: Sustained neuroinflammation strongly contributes to the pathogenesis of pain. The clinical challenge of chronic pain relief led to the identification of molecules such as cytokines, chemokines and more recently matrix metalloproteinases (MMPs) as putative therapeutic targets. Evidence points to a founder member of the matricial CCN family, NOV/CCN3, as a modulator of these inflammatory mediators. We thus investigated the possible involvement of NOV in a preclinical model of persistent inflammatory pain. METHODS: We used the complete Freund's adjuvant (CFA)-induced model of persistent inflammatory pain and cultured primary sensory neurons for in vitro experiments. The mRNA expression of NOV and pro-inflammatory factors were measured with real-time quantitative PCR, CCL2 protein expression was assessed using ELISA, MMP-2 and -9 activities using zymography. The effect of drugs on tactile allodynia was evaluated by the von Frey test. RESULTS: NOV was expressed in neurons of both dorsal root ganglia (DRG) and dorsal horn of the spinal cord (DHSC). After intraplantar CFA injection, NOV levels were transiently and persistently down-regulated in the DRG and DHSC, respectively, occurring at the maintenance phase of pain (15 days). NOV-reduced expression was restored after treatment of CFA rats with dexamethasone. In vitro, results based on cultured DRG neurons showed that siRNA-mediated inhibition of NOV enhanced IL-1beta- and TNF-alpha-induced MMP-2, MMP-9 and CCL2 expression whereas NOV addition inhibited TNF-alpha-induced MMP-9 expression through beta1 integrin engagement. In vivo, the intrathecal delivery of MMP-9 inhibitor attenuated mechanical allodynia of CFA rats. Importantly, intrathecal administration of NOV siRNA specifically led to an up-regulation of MMP-9 in the DRG and MMP-2 in the DHSC concomitant with increased mechanical allodynia. Finally, NOV intrathecal treatment specifically abolished the induction of MMP-9 in the DRG and, MMP-9 and MMP-2 in the DHSC of CFA rats. This inhibitory effect on MMP is associated with reduced mechanical allodynia. CONCLUSIONS: This study identifies NOV as a new actor against inflammatory pain through regulation of MMPs thus uncovering NOV as an attractive candidate for therapeutic improvement in pain relief.



Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
Ccn3Ratnegative regulation of sensory perception of pain involved_inIMP PMID:22353423UniProt 

Objects Annotated

Genes (Rattus norvegicus)
Ccn3  (cellular communication network factor 3)


Additional Information