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Different expression of β subunits of the KCa1.1 channel by invasive and non-invasive human fibroblast-like synoviocytes.

Arthritis research & therapy | 2016

Fibroblast-like synoviocytes (FLS) in rheumatoid arthritis (RA-FLS) contribute to joint inflammation and damage characteristic of the disease. RA-FLS express KCa1.1 (BK, Slo1, MaxiK, KCNMA1) as their major plasma membrane potassium channel. Blocking KCa1.1 reduces the invasive phenotype of RA-FLS and attenuates disease severity in animal models of RA. This channel has therefore emerged as a promising therapeutic target in RA. However, the pore-forming α subunit of KCa1.1 is widely distributed in the body, and blocking it induces severe side effects, thus limiting its value as a therapeutic target. On the other hand, KCa1.1 channels can also contain different accessory subunits with restricted tissue distribution that regulate channel kinetics and pharmacology. Identification of the regulatory subunits of KCa1.1 expressed by RA-FLS may therefore provide the opportunity for generating a selective target for RA treatment.

Pubmed ID: 27165430 RIS Download

Research resources used in this publication

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Associated grants

  • Agency: NHLBI NIH HHS, United States
    Id: T32 HL007676
  • Agency: NCI NIH HHS, United States
    Id: P30 CA125123
  • Agency: NIAID NIH HHS, United States
    Id: T32 AI053831
  • Agency: NIAID NIH HHS, United States
    Id: P30 AI036211
  • Agency: NCRR NIH HHS, United States
    Id: S10 RR024574
  • Agency: NIGMS NIH HHS, United States
    Id: T32 GM088129

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