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Gamal DM, Badr FM, Taha SIAEF, Moustafa NM, Teama MAEM. Serum beta-2 microglobulin as a predictor of nephritis, disease activity, and damage score in systemic lupus erythematosus: a cross-sectional study. Rheumatol Int 2023; 43:323-333. [PMID: 36205758 PMCID: PMC9898324 DOI: 10.1007/s00296-022-05221-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 09/24/2022] [Indexed: 02/06/2023]
Abstract
A strong correlation between lupus nephritis (LN), disease activity, and serum beta 2-microglobulin (b2MG) was observed. The current study examines the correlation between serum b2MG and renal involvement, damage score, and disease activity in systemic lupus erythematosus (SLE) patients. One hundred SLE patients from Ain Shams University Hospital were enrolled and categorized into two groups. Group I had 40 patients with negative b2MG, while Group II had 60 patients with positive b2MG levels. Medical history, clinical examination, and assessing disease activity based on SLE disease activity index (SLEDAI-2 K), and damage score were recorded for all patients. Laboratory examinations, such as serum b2MG, complete blood count, blood urea nitrogen (BUN), serum creatinine, glomerular filtration rate (GFR), urine analysis, 24 h urinary protein excretion, Antinuclear antibodies (ANA), anti-dsDNA antibody, and serum complement (C3, C4). BUN, 24 h urinary protein, serum creatinine, active urinary sediment, SLEDAI score, and damage score were all elevated in group II compared to group I (p < 0.001). There is a positive correlation between serum b2MG and 24 h urinary protein, BUN, serum creatinine, disease activity, and damage score (p < 0.001), while it was negatively correlated with GFR, C3, and C4 (p < 0.001). Serum b2MG has proven to be a predictor of LN in SLE patients (Sensitivity 92.45%, Specificity 74.47%), also being a predictor of the activity of the disease as well as damage index (Sensitivity 96.67%, Specificity 85%) (Sensitivity 92.45%, Specificity 74.47%), respectively. Serum b2MG level can be used as a valuable predictor for LN, clinical disease activity, and damage score.
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Affiliation(s)
- Dalia Mohamed Gamal
- Internal Medicine, Rheumatology and Immunology, Faculty of Medicine, 2 Staff Member Buildings of Ain Shams University, Ramsis Street, Abbassya Square, El Al Waili/El-Abaseya, Post No: 11517, Cairo, Egypt
| | - Fatma Mohammed Badr
- Internal Medicine, Rheumatology and Immunology, Faculty of Medicine, 2 Staff Member Buildings of Ain Shams University, Ramsis Street, Abbassya Square, El Al Waili/El-Abaseya, Post No: 11517, Cairo, Egypt
| | | | - Nouran M Moustafa
- Medical Microbiology and Immunology Department, Faculty of Medicine, Ain Shams University, Ramsis Street, Abbassya Square, Cairo, Egypt
| | - Mohammed Abd El Monem Teama
- Internal Medicine, Rheumatology and Immunology, Faculty of Medicine, 2 Staff Member Buildings of Ain Shams University, Ramsis Street, Abbassya Square, El Al Waili/El-Abaseya, Post No: 11517, Cairo, Egypt.
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Allam NT, Ali MA, El-Abed DM, Zahran AM. Serum beta2-microglobulin level in systemic lupus erythematosus patients: Relation to disease activity. THE EGYPTIAN RHEUMATOLOGIST 2023. [DOI: 10.1016/j.ejr.2022.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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