Arterial hypertension (HPT) burden up to two third of systemic lupus erythematosus (SLE) patients and contributes to accelerated atherosclerosis and cardiovascular (CV) risk. We aim to determine the prevalence of HPT among lupus nephritis (LN) patients who were in complete remission (CR) for a minimum of 6 months, with estimated glomerular filtration rate (eGFR) of >60 mL/min/1.73 m(2). This is a cross-sectional study of 64 LN patients who attended Nephrology/SLE Clinic at The National University of Malaysia Medical Centre (UKMMC). Persistent hypertension (blood pressure (BP) ≥140/90 mmHg for at least two occasions), CR for a minimum of 6 months and eGFR of >60 mL/min/1.73 m(2) were identified. Univariate and multivariate analyses were performed to determine the demographic and disease characteristics associated with HPT. Thirty-four of them (53.1 %) were hypertensive. Persistent HPT was associated with disease duration, acute kidney injury and high BP at the onset of LN, longer duration interval to achieve CR, number of relapses and cyclosporine A (CyA) use. There were no associations between histological classes, nephrotic range proteinuria, body mass index and waist circumference with HPT. Factors independently associated with HPT were disease duration OR 1.06 [95 %CI (0.91-1.24)], longer duration interval to achieve CR OR 1.104 [95 %CI (1.02-1.19)], number of relapses OR 2.53 [95 % CI (1.01-6.3)] and CyA use OR 5.3 [95 % CI (1.14-23.9)]. The prevalence of HPT among LN is high despite in remission. Aggressive treatment is important to achieve early CR and to prevent relapses.
Study site: Nephrology/SLE clinics, Pusat Perubatan Universiti Kebangsaan Malaysia (PPUKM), Kuala Lumpur, Malaysia
AIM: The main objective of this study is to elucidate the role of immunoglobulin A (IgA) rheumatoid factor (RF) in predicting the clinical response to tumour necrosis factor α inhibitors (TNFi) among patients with rheumatoid arthritis (RA).
METHOD: We recruited all patients with RA who were ever on TNFi for a minimum duration of 3 months at our centre. Based on the European League Against Rheumatism response criteria, subjects were further divided into responders and non-responders. Age-matched RA patients who were on conventional disease-modifying anti-rheumatic drugs and in remission were enrolled as controls. Subjects were tested for quantitative values of IgA, IgM, IgG RF and anti-citrulinated cyclic peptides (CCP). Further, all subjects were assessed for the disease activity score that includes 28 joints (DAS28) and Stanford Health Assessment Questionnaire (HAQ) 8-item Disability Index (HAQ-DI).
RESULTS: A total of 31 subjects with RA who had received TNFi and 15 controls were enrolled in this study. There was a trend for the non-responders (n = 10) to have higher levels of all isotypes of RF and anti-CCP. However, only the IgA RF and anti-CCP levels were significantly higher in the non-responder group compared to the responders and controls (P = 0.001, P = 0.034, respectively). On multivariate analysis, only the IgA RF remained significant (OR 0.989; 95% CI 0.980-0.999; P = 0.026).
CONCLUSION: IgA RF is potentially a novel predictor of response to TNFi in RA patients. Testing for pretreatment IgA RF levels could be a reasonable consideration before commencement of TNFi.
Study site: Pusat Perubatan Universiti Kebangsaan Malaysia (PPUKM), Kuala Lumpur, Malaysia
The purpose of this study was to compare the serum interleukin (IL)-23 levels between rheumatoid arthritis (RA) patients and healthy controls and to determine the correlation of IL-23 levels with disease activity, joint damage and functional disability in RA. Serum samples were obtained from 45 patients with RA and 45 healthy controls. The enzyme-linked immunosorbent assay method was used for quantitative analysis of IL-23. All the RA patients were assessed for disease activity based on the 28-joint disease activity score, joint damage based on modified Sharp score, and functional ability using the Health Assessment Questionnaire-Disability Index. The mean serum IL-23 level was much higher among the RA patients (24.50 ± 13.98 pg/mL) compared to the controls (5.98 ± 3.40 pg/mL; p < 0.01). There was a significant positive relationship between IL-23 levels and disease activity and questionnaire scores (p = 0.003 and 0.020, respectively). On logistic regression analysis, IL-23 levels were significantly higher in patients with moderate to high disease activity (p = 0.008, odds ratio = 1.073, 95% confidence interval = 1.019-1.130) and patients with significant functional disability (p = 0.008, odds ratio = 1.085, 95% confidence interval = 1.021-1.153). RA patients have significantly higher levels of serum IL-23. The IL-23 levels correlate well with disease activity and functional disability but not with radiographic joint damage.
Study site: Rheumatology clinic, Pusat Perubatan Universiti Kebangsaan Malaysia (PPUKM)