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Radiolabelled lymphocyte migration in rheumatoid synovitis
C Jorgensen1, I Couret, C Bologna
1Service d'Immuno-Rhumatologie, Centre Gui-de-Chauliac, Montpellier, France.
Annals of the Rheumatic Diseases
|January 1, 1995
Summary
Technetium-99m hexamethyl propylene amineoxime (HMPAO) labelled lymphocyte scintigraphy effectively detects active rheumatoid arthritis (RA) synovitis. The imaging technique shows distinct lymphocyte kinetics in early versus long-standing RA, aiding in disease assessment.
Area of Science:
- Nuclear medicine
- Rheumatology
- Immunology
Background:
- Rheumatoid arthritis (RA) is characterized by synovial inflammation.
- Accurate quantification of synovial inflammation is crucial for RA management.
- Technetium-99m hexamethyl propylene amineoxime (HMPAO) labeled lymphocyte scintigraphy is a potential imaging modality.
Purpose of the Study:
- To evaluate the ability of 99mTc-HMPAO labeled lymphocyte scintigraphy to quantify synovial inflammation in RA patients.
- To analyze the kinetics of lymphocyte retention within the joints of RA patients.
Main Methods:
- Lymphocytes were isolated and radiolabeled in vitro with 99mTc-HMPAO.
- Scintigraphic scans were performed at 30 minutes, 3 hours, and 20 hours post-injection.
Main Results:
- Increased scintigram signal at 20 hours correlated with joint swelling and pain, predicting active synovitis.
- Lymphocyte kinetics differed based on disease duration: early RA showed increasing and persistent signals, while long-standing RA had decreasing signals at 20 hours.
- Scintigraphy detected and localized active RA.
Conclusions:
- 99mTc-HMPAO joint scintigraphy is a valuable tool for detecting and localizing active rheumatoid arthritis.
- The study highlights the potential of this technique in assessing disease activity and understanding lymphocyte behavior in RA.