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KCa1.1 potassium channels regulate key proinflammatory and invasive properties of fibroblast-like synoviocytes in rheumatoid arthritis.

The Journal of biological chemistry | 2012

Fibroblast-like synoviocytes (FLS) play important roles in the pathogenesis of rheumatoid arthritis (RA). Potassium channels have regulatory roles in many cell functions. We have identified the calcium- and voltage-gated KCa1.1 channel (BK, Maxi-K, Slo1, KCNMA1) as the major potassium channel expressed at the plasma membrane of FLS isolated from patients with RA (RA-FLS). We further show that blocking this channel perturbs the calcium homeostasis of the cells and inhibits the proliferation, production of VEGF, IL-8, and pro-MMP-2, and migration and invasion of RA-FLS. Our findings indicate a regulatory role of KCa1.1 channels in RA-FLS function and suggest this channel as a potential target for the treatment of RA.

Pubmed ID: 22074915 RIS Download

Research resources used in this publication

None found

Additional research tools detected in this publication

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Associated grants

  • Agency: NCRR NIH HHS, United States
    Id: M01 RR018535
  • Agency: NIAID NIH HHS, United States
    Id: AI036211
  • Agency: NCRR NIH HHS, United States
    Id: M01RR018535
  • Agency: NCRR NIH HHS, United States
    Id: S10RR024574
  • Agency: NCI NIH HHS, United States
    Id: P30CA125123
  • Agency: NIAID NIH HHS, United States
    Id: R01 AI054348
  • Agency: NIAID NIH HHS, United States
    Id: AI54348
  • Agency: NIAID NIH HHS, United States
    Id: P30 AI036211
  • Agency: NIAID NIH HHS, United States
    Id: R56 AI084981
  • Agency: NCRR NIH HHS, United States
    Id: S10 RR024574
  • Agency: NINDS NIH HHS, United States
    Id: NS042901
  • Agency: NCI NIH HHS, United States
    Id: P30 CA125123
  • Agency: NIAID NIH HHS, United States
    Id: AI084981
  • Agency: NINDS NIH HHS, United States
    Id: R01 NS042901
  • Agency: NIAMS NIH HHS, United States
    Id: R03 AR059838
  • Agency: NIAMS NIH HHS, United States
    Id: AR0426213
  • Agency: NIAMS NIH HHS, United States
    Id: AR059838

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This is a list of tools and resources that we have found mentioned in this publication.


Anti-Slo1 Maxi-K+ Channel Antibody (antibody)

RRID:AB_10698180

This monoclonal targets Slo1 potassium channel

View all literature mentions

Anti-Slo1 Maxi-K+ Channel Antibody (antibody)

RRID:AB_2249538

This monoclonal targets Slo1 maxi-K+ channel

View all literature mentions