Related Experiment Video
Updated: Feb 28, 2026
Routine Screening Method for Microparticles in Platelet Transfusions
Published on: January 31, 2018
[Association of Elevated Platelet Microparticles with Disease Activity in Rheumatoid Arthritis]
Li-Jia Xue1, Bei-Bei Cui1, Xi Li2
1Department of Rheumatology, West China Hospital, Sichuan University, Chengdu 610041, China.
Objectives:
To explore the expression of platelets microparticles (PMPs) in peripheral blood (PB) and synovial fluid (SF) of rheumatoid arthritis (RA) patients and its correlation with clinical inflammatory parameters.
Methods:
The levels of PMPs in PB were detected by flow cytometry in 26 active RA patients and 15 healthy control (HC). SF was collected from 16 patients. The percentages of CD62P+PMPs, CD154+PMPs and clinical parameters (including CRP, ESR, RF and ACPA) were also measured, then the correlations of PMPs with these parameters were analyzed.
Results:
PMPs levels in PB of RA patients were higher than those in PB from HC and those in SF of RA patients (P< 0.01). CD62P+PMPs levels in PB of RA patients were higher than those in PB of HC and those in SF of RA patients (P< 0.05). CD154+PMPs levels in PB of RA patients were higher than those in PB of HC (P< 0.01) and those in SF of RA patients (P< 0.05). The levels of PB PMPs were positively correlated with disease activity score DAS28 ( r=0.462, P=0.018), but not with ESR, CRP, RF or ACPA. The levels of SF PMPs were not correlated with any of them (P>0.05).
Conclusions:
PMPs may be involved in immune regulation and systemic inflammation of RA. The elevated levels of PMPs could be a potential biomarker for RA.
Insights
Platelet microparticles (PMPs) are elevated in rheumatoid arthritis (RA) patients' blood and correlate with disease activity. These PMPs may serve as a potential biomarker for RA, indicating involvement in systemic inflammation.
Area of Science:
- Rheumatology
- Immunology
- Biomarker Discovery
Background:
- Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by systemic inflammation.
- Platelet microparticles (PMPs) are small vesicles released from activated platelets, implicated in inflammatory processes.
Purpose of the Study:
- To investigate the expression levels of PMPs in peripheral blood (PB) and synovial fluid (SF) of RA patients.
- To determine the correlation between PMP levels and clinical inflammatory parameters in RA.
Main Methods:
- Flow cytometry was used to quantify PMP levels in PB of 26 active RA patients and 15 healthy controls (HC).
- SF was collected from 16 RA patients.
- Percentages of CD62P+PMPs and CD154+PMPs were measured, alongside clinical markers like CRP, ESR, RF, and ACPA.
Main Results:
- PMP levels in the PB of RA patients were significantly higher than in HC and SF (P<0.01).
- Elevated CD62P+PMPs and CD154+PMPs were observed in RA patients' PB compared to HC and SF (P<0.05).
- PB PMP levels positively correlated with the DAS28 disease activity score (r=0.462, P=0.018) but not with ESR, CRP, RF, or ACPA.
Conclusions:
- Elevated PMPs in RA patients suggest their involvement in immune regulation and systemic inflammation.
- Increased PMP levels may represent a potential diagnostic biomarker for rheumatoid arthritis.
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