Dendritic Cell Subsets in Psoriatic and Rheumatoid Arthritis
Author Information
Author(s): Jongbloed Sarah L, Lebre M Cristina, Fraser Alasdair R, Gracie J Alastair, Sturrock Roger D, Tak Paul P, McInnes Iain B
Primary Institution: Division of Immunology, Infection and Inflammation, Glasgow Royal Infirmary, UK
Hypothesis
The study aims to characterize the immunophenotype and functional characteristics of dendritic cell subsets in psoriatic arthritis and rheumatoid arthritis.
Conclusion
Dendritic cell numbers are reduced in the peripheral blood of rheumatoid arthritis and psoriatic arthritis patients, and their maturation is incomplete in the inflamed synovial compartment.
Supporting Evidence
- Circulating pDC numbers were significantly reduced in PsA and RA patients compared to healthy controls.
- mDCs were significantly reduced in RA patients compared to healthy controls.
- Both mDCs and pDCs in the synovial fluid exhibited an immature phenotype.
Takeaway
The study found that certain immune cells called dendritic cells are fewer in people with arthritis, which might affect how their bodies respond to inflammation.
Methodology
The study used flow cytometry to analyze dendritic cell subsets in blood and synovial fluid from patients with psoriatic arthritis, rheumatoid arthritis, and healthy controls.
Potential Biases
Potential bias due to the exclusion of patients on corticosteroids.
Limitations
The study did not include patients on corticosteroids, which may affect dendritic cell numbers.
Participant Demographics
Participants included 12 rheumatoid arthritis patients, 13 psoriatic arthritis patients, 11 osteoarthritis patients, and 12 healthy controls.
Statistical Information
P-Value
0.0098 for pDCs in PsA, 0.0194 for pDCs in RA, 0.0086 for mDCs in RA
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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