RGD Reference Report - Granulocyte chemotaxis and disease expression are differentially regulated by GRK subtype in an acute inflammatory arthritis model (K/BxN). - Rat Genome Database

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Granulocyte chemotaxis and disease expression are differentially regulated by GRK subtype in an acute inflammatory arthritis model (K/BxN).

Authors: Tarrant, TK  Rampersad, RR  Esserman, D  Rothlein, LR  Liu, P  Premont, RT  Lefkowitz, RJ  Lee, DM  Patel, DD 
Citation: Tarrant TK, etal., Clin Immunol. 2008 Oct;129(1):115-22. Epub 2008 Jul 26.
RGD ID: 5688373
Pubmed: PMID:18662895   (View Abstract at PubMed)
PMCID: PMC2637521   (View Article at PubMed Central)
DOI: DOI:10.1016/j.clim.2008.06.008   (Journal Full-text)

OBJECTIVE: Chemokine receptors are G-protein coupled receptors (GPCRs) phosphorylated by G-protein receptor kinases (GRKs) after ligand-mediated activation. We hypothesized that GRK subtypes differentially regulate granulocyte chemotaxis and clinical disease expression in the K/BxN model. METHODS: Clinical, histologic, and cytokine responses in GRK6-/-, GRK5-/-, GRK2+/-, and wildtype mice were evaluated using K/BxN serum transfer. Granulocyte chemotaxis was analyzed by transendothelial migration assays. RESULTS: Both GRK6-/- and GRK2+/- mice had increased arthritis disease severity (p<0.001); whereas GRK5-/- was not different from controls. Acute weight loss was enhanced in GRK6-/- and GRK2+/- mice (p<0.001, days 3-10). However, GRK6-/- mice uniquely had more weight loss (>10%), elevated serum IL-6, and enhanced migration toward LTB4 and C5a in vitro. CONCLUSIONS: GRK6 and -2, but not GRK5, are involved in the pathogenesis of acute arthritis in the K/BxN model. In particular, GRK6 may dampen inflammatory responses by regulating granulocyte trafficking toward chemoattractants.



RGD Manual Disease Annotations    Click to see Annotation Detail View

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
GRK2Humanrheumatoid arthritis  ISOGrk2 (Mus musculus)DNA: deletion: : heterozygousRGD 
GRK5Humanrheumatoid arthritis no_associationISOGrk5 (Mus musculus)DNA: deletion::GRK2 and GRK6 deletions resulted in more severe arthritisRGD 
GRK6Humanrheumatoid arthritis  ISODNA: deletion: : homozygousRGD 
Grk2Ratrheumatoid arthritis  ISOGrk2 (Mus musculus)DNA: deletion: : heterozygousRGD 
Grk2Mouserheumatoid arthritis  IAGP DNA: deletion: : heterozygousRGD 
Grk5Ratrheumatoid arthritis no_associationISOGrk5 (Mus musculus)DNA: deletion::GRK2 and GRK6 deletions resulted in more severe arthritisRGD 
Grk5Mouserheumatoid arthritis no_associationIAGP DNA: deletion::GRK2 and GRK6 deletions resulted in more severe arthritisRGD 
Grk6Ratrheumatoid arthritis  ISODNA: deletion: : homozygousRGD 
Grk6Mouserheumatoid arthritis  IAGP DNA: deletion: : homozygousRGD 

Objects Annotated

Genes (Rattus norvegicus)
Grk2  (G protein-coupled receptor kinase 2)
Grk5  (G protein-coupled receptor kinase 5)
Grk6  (G protein-coupled receptor kinase 6)

Genes (Mus musculus)
Grk2  (G protein-coupled receptor kinase 2)
Grk5  (G protein-coupled receptor kinase 5)
Grk6  (G protein-coupled receptor kinase 6)

Genes (Homo sapiens)
GRK2  (G protein-coupled receptor kinase 2)
GRK5  (G protein-coupled receptor kinase 5)
GRK6  (G protein-coupled receptor kinase 6)


Additional Information