Beta 2-microglobulin can be a disease activity marker in systemic lupus erythematosus

• Published in: The American journal of the medical sciences Vol. 339; no. 4; p. 337
• Main Authors: Kim, Hyoun-Ah, Jeon, Ja-Young, Yoon, Jeong-Moon, Suh, Chang-Hee
• Format: Journal Article
• Language: English
• Published: United States 01.04.2010
• Subjects: Adolescent; Adult; beta 2-Microglobulin - blood; Biomarkers - blood; Female; Humans; Lupus Erythematosus, Systemic - blood; Lupus Erythematosus, Systemic - diagnosis; Male; Middle Aged; Young Adult
• ISSN: 1538-2990
• DOI: 10.1097/MAJ.0b013e3181d26dfb

To investigate the clinical significance of beta2-microglobulin in Korean patients with systemic lupus erythematosus (SLE). Blood samples were collected from patients with SLE (n = 100) and normal healthy controls (n = 50). The level of beta2-microglobulin was investigated by enzyme-linked immunosorbent assay. Serial samples from SLE patients were collected at 4.2 +/- 2.6 months after first sampling. The beta2-microglobulin levels of the SLE patients (2.64 +/- 0.11 microg/mL) were higher than the normal controls (2.14 +/- 0.04 microg/mL, P < 0.001). The patients with SLE with serositis, oral ulcer, or lupus nephritis had significantly higher beta2-microglobulin levels than those without, respectively. A significant correlation was found between the beta2-microglobulin level and each of anti-dsDNA antibody, hemoglobin, complement, and SLE Disease Activity Index. In sequential sampling of patients with SLE, a positive correlation was found between the change of the SLE Disease Activity Index and the change of the beta2-microglobulin levels. These data suggest that the measurement of beta2-microglobulin seem to be a useful addition to the laboratory tests that can help in assessment of disease activity of SLE.