Lupus in Baltimore: evidence-based ‘clinical pearls’ from the Hopkins Lupus Cohort

A Systematic Review of the Economic Evaluations of Belimumab in Systemic Lupus Erythematosus

OBJECTIVES

Systemic lupus erythematosus is a heterogeneous, multisystem autoimmune disease. These attributes cause lupus to be a challenging condition to adequately manage, which is further aggravated by the lack of treatment modalities. Belimumab is a full human monoclonal antibody, and its safety and efficacy in lupus management have been demonstrated in a number of randomized clinical trials. However, these gains come at a high cost in an era that is demarcated by soaring pharmaceutical expenditure. Therefore, the objective of this paper is to critically assess the economic evaluations of belimumab.

METHODS

A systematic review was performed for economic evaluations of belimumab and the retrieved studies were assessed with the quality of health economic studies questionnaire.

RESULTS

A total of 3 studies and 5 abstracts were retrieved. Belimumab demonstrated a consistent favorable economic profile across Spain, Italy, Portugal, Greece, Hong Kong, Canada, and Greece. The sensitivity analyses revealed that the effectiveness of treatment and the discontinuation rate had the greatest effect on the outcome.

CONCLUSION

Current data underscore a favorable cost-effectiveness ratio of belimumab in the treatment of systemic lupus erythematosus. Results are consistent across Spain, Italy, Portugal, Greece, Hong Kong, Canada, and Greece, countries for which an economic evaluation was available. Nevertheless, the low number of assessments, along with concerns regarding its long-term effectiveness, underpin areas that necessitate further research.

Lupus Cohorts

Large cohorts with diverse ethnic backgrounds and heterogenous clinical features have provided the real-life data about the safety and efficacy of various treatment regimens for systemic lupus erythematosus (SLE). There are multiple well-established regional, national, and international lupus cohorts that have made significant contributions to the understanding of SLE. Using social media for cohort-based studies can significantly increase the outreach in a short time period for studying rare diseases such as SLE. Lack of strict inclusion criteria allows study of a broad range of patients but selection bias and incomplete data are possible in long-term cohort studies.

Impact of systemic lupus erythematosus disease activity, hydroxychloroquine and NSAID on the risk of subsequent organ system damage and death: analysis in a single US medical centre

OBJECTIVE

To assess the impact of mild-moderate systemic lupus erythematosus (SLE) disease activity during a 12-month period on the risk of death or subsequent organ system damage.

METHODS

1168 patients with ≥24 months of follow-up from the Hopkins Lupus Cohort were included. Disease activity in a 12-month observation period was calculated using adjusted mean Safety of Estrogens in Lupus Erythematosus National Assessment (SELENA) version of the SLE Disease Activity Index (SLEDAI), defined as the area under the curve divided by the time interval. Damage accrual in the follow-up period was defined as change in Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index (SDI) score ≥1 among patients without prior damage. Patients visited the clinic quarterly and had SELENA-SLEDAI and SDI assessed at every visit.

RESULTS

During follow-up (median 7 years), 39% of patients accrued new damage in any organ system (7% cardiovascular and 3% renal) and 8% died. In adjusted models, an increased SELENA-SLEDAI score increased the risk of death (HR=1.22, 95% CI 1.13 to 1.32, p<0.001), renal damage (HR=1.24, 95% CI 1.08 to 1.42, p=0.003) and cardiovascular damage (HR=1.17, 95% CI 1.07 to 1.29, p<0.001). Hydroxychloroquine use reduced the risk of death (HR=0.46, 95% CI 0.29 to 0.72, p<0.05) and renal damage (HR=0.30, 95% CI 0.13 to 0.68, p<0.05). Non-steroidal anti-inflammatory drug use increased the risk of cardiovascular damage (HR=1.66, 95% CI 1.04 to 2.63, p<0.05). Without prior damage, an increased adjusted mean SELENA-SLEDAI score increased the risk of overall damage accrual (HR=1.09, 95% CI 1.04 to 1.15, p<0.001).

CONCLUSIONS

Each one-unit increase in adjusted mean SELENA-SLEDAI during a 12-month observation period was associated with an increased risk of death and developing cardiovascular and renal damage.

HIBISCUS: Hydroxychloroquine for the secondary prevention of thrombotic and obstetrical events in primary antiphospholipid syndrome

The relapse rate in antiphospholipid syndrome (APS) remains high, i.e. around 20%-21% at 5 years in thrombotic APS and 20-28% in obstetrical APS [2, 3]. Hydroxychloroquine (HCQ) appears as an additional therapy, as it possesses immunomodulatory and anti-thrombotic various effects [4-16]. Our group recently obtained the orphan designation of HCQ in antiphospholipid syndrome by the European Medicine Agency. Furthermore, the leaders of the project made the proposal of an international project, HIBISCUS, about the use of Hydroxychloroquine in secondary prevention of obstetrical and thrombotic events in primary APS. This study has been launched in several countries and at now, 53 centers from 16 countries participate to this international trial. This trial consists in two parts: a retrospective and a prospective study. The French part of the trial in thrombosis has been granted by the French Minister of Health in December 2015 (the academic trial independent of the pharmaceutical industry PHRC N PAPIRUS) and is coordinated by one of the members of the leading consortium of HIBISCUS.

Hydroxychloroquine in the primary thrombosis prophylaxis of antiphospholipid antibody positive patients without systemic autoimmune disease

Objective The objective of this study was to determine the efficacy of hydroxychloroquine (HCQ) in the primary thrombosis prevention of antiphospholipid antibody (aPL)-positive patients with no other systemic autoimmune diseases. Methods Under the auspices of Antiphospholipid Syndrome Alliance for Clinical Trials and International Networking, a multicenter, international, randomized controlled trial (RCT) was initiated, in which persistently aPL-positive but thrombosis-free patients without systemic autoimmune diseases were randomized to receive HCQ or no treatment in addition to their standard regimen. The primary objective was the efficacy of HCQ in preventing the first thrombosis. The secondary objectives were the thrombosis incidence rate, and the effects of HCQ on aPL profile and mortality rate. Patients were risk-stratified based on antiplatelet agent use. The goal was to follow patients every 6 months for 5 years. Results We recruited 20 persistently aPL-positive patients (female: 19, mean age: 46.6 ± 9.9 years, and baseline antiplatelet medication: 14); 9/20 were randomized to HCQ. During the mean follow-up of 1.7 years, no patients developed thrombosis or a serious adverse event. The study was terminated early due to the low recruitment rate, exacerbated by the prolonged manufacturing shortage and significant price increase of HCQ in the United States. Conclusion Given that a small number of patients with a relatively short follow-up were enrolled in our RCT, and no patients developed thrombosis, we cannot accurately assess the effectiveness of HCQ for primary thrombosis prevention in persistently aPL-positive patients with no other systemic autoimmune diseases. Our experience suggests that conducting an international RCT, especially without pharmaceutical support, is an extremely challenging undertaking.

Insulin-Like Growth Factor Binding Protein-4 as a Marker of Chronic Lupus Nephritis

Kidney biopsy remains the mainstay of Lupus Nephritis (LN) diagnosis and prognostication. The objective of this study is to identify non-invasive biomarkers that closely parallel renal pathology in LN. Previous reports have demonstrated that serum Insulin-like growth factor binding protein 4 (IGFBP-4) was increased in diabetic nephropathy in both animal models and patients. We proceeded to assess if IGFBP4 could be associated with LN. We performed ELISA using the serum of 86 patients with LN. Normal healthy adults (N = 23) and patients with other glomerular diseases (N = 20) served as controls. Compared to the healthy controls or other glomerular disease controls, serum IGFBP-4 levels were significantly higher in the patients with LN. Serum IGFBP-4 did not correlate well with systemic lupus erythematosus disease activity index (SLEDAI), renal SLEDAI or proteinuria, but it did correlate with estimated glomerular filtration rate (R = 0.609, P < 0.0001). Interestingly, in 18 patients with proliferative LN whose blood samples were obtained at the time of renal biopsy, serum IGFBP-4 levels correlated strongly with the chronicity index of renal pathology (R = 0.713, P < 0.001). IGFBP-4 emerges a potential marker of lupus nephritis, reflective of renal pathology chronicity changes.

Outcome of lupus nephritis in childhood onset SLE in North and Central India: single-centre experience over 25 years

INTRODUCTION

Childhood SLE (cSLE) has a higher prevalence of lupus nephritis (LN), and there are ethnic variations in response to treatment as well as outcome of LN. There are limited data on long-term outcome of LN in cSLE from the Indian subcontinent.

METHODS

Retrospective analysis of case records of patients with cSLE (satisfying revised American College of Rheumatology (ACR) 1997 criteria for diagnosis) and age of onset <18 years was conducted from 1989 to 2013. Data on clinical features, renal involvement and biopsy findings, treatment, renal outcome, damage accrual and mortality were collected. End-stage renal disease (ESRD) was defined as the need for renal replacement therapy. Actuarial ESRD-free survival was studied as the primary outcome measure using Kaplan-Meier analysis.

RESULTS

Among 205 children with cSLE, 134 (121 girls) had evidence of LN. The mean age at disease onset was 13.7 ± 3.5 years and the mean disease duration at presentation was 1.9 ± 2.5 years. Kidney biopsy was available for 92 patients, and histology included: 13 (14.2%) Class II, 24 (26%) Class III, 43 (46.7%) Class IV and 12 (13.1%) Class V LN. The mean follow-up period was 6.75 ± 5.7 years. At last visit, 81 (60.4%) children were in complete remission, 28 (20.9%) were in partial remission, 15 (11.2%) still had active nephritis and 10 (7.4%) had progressed to ESRD. Almost two-thirds (62.9%) of patients experienced lupus flares, and mean flare rate was 0.09 flares/patient follow-up year. Fifty-six (43.8%) children accrued damage and the mean Systemic Lupus International Collaborating Clinics (SLICC)/ACR damage score was 0.79 ± 1.13. Actuarial ESRD-free survival at five, 10 and 15 years was 91.1%, 79% and 76.2%, and five-, 10- and 15-year renal survival was 93.8%, 87.1% and 84%, respectively. Although multiple factors individually predicted poor outcome (death/ESRD), only raised serum creatinine at onset (R square = 0.65, p ≤ 0.0001) and damage accrual (R square = 0.62, p ≤ 0.0001) remained significant on multivariate analysis. Eleven (8.2%) children died during the follow-up period, and infections were the leading cause of mortality.

CONCLUSIONS

Long-term outcome of LN in cSLE in our cohort was better than previous reports from India. However, a high rate of major infection still remains the leading cause of mortality.

Therapy and pharmacological properties of hydroxychloroquine and chloroquine in treatment of systemic lupus erythematosus, rheumatoid arthritis and related diseases

OBJECTIVES

This review examines the pharmacokinetics, modes of action and therapeutic properties of the anti-malarial drugs, hydroxychloroquine (HCQ) and chloroquine (CQ), in the treatment of systemic lupus erythematosus (SLE), rheumatoid arthritis (RA) and related conditions, as well as osteoarthritis (OA).

KEY FINDINGS

Both HCQ and CQ have historically been employed successfully for the treatment of SLE and RA for over 70 years. HCQ has been used extensively for SLE where it has a good reputation for controlling the dermatological complications in SLE. It has also been reported to effectively control the symptoms of Sjøgren's syndrome, as well as preventing thrombosis in phospholipid antibody (aPL) syndrome. In RA and SLE, HCQ is preferred because of the lower incidence of gastrointestinal adverse reactions compared with CQ and it might have a lower risk of ocular adverse reactions. There is increasing evidence that HCQ may reduce atherosclerosis and risks of cardiovascular disease in rheumatic patients. Both HCQ and CQ have been shown to improve glycaemia and reduce the risks of type II diabetes mellitus. Although both HCQ and CQ are effective in low-moderate RA, HCQ is now preferred as part of combination therapy for more severe disease. The advantages of combination therapy are that the doses of the individual drugs may be lowered so reducing adverse reactions. Both HCQ and CQ are diastereoisomers, have basic properties and are given as the sulphate and phosphate salts. While being relatively well absorbed orally and with good bioavailability, they have long and variable plasma terminal elimination half-lives (approximately 40-60 days). This reflects their high volume of distribution, V D (HCQ 44,000L; CQ 65,000L) which extends into aqueous compartments, long mean residence time (HCQ 1300 h; CQ 900 h) and with about half the drugs (metabolites) undergoing renal clearance. The strong binding to melanin reflects the ocular injury and dermatological properties of these drugs. The consensus is that the occurrence of ocular adverse reactions can be minimised by close attention to the dose (which should be set on a body weight basis) with regular (e.g. quarterly) retinal examination. Although HCQ and CQ can pass through the placenta, the use of these drugs during pregnancy does not appear to risk harm to the baby and might be beneficial to the mother with SLE and her child by controlling the SLE disease activity, which is known to be an important factor affecting pregnancy outcome. The modes of action of HCQ and CQ in these arthritides represent somewhat of an enigma. Undoubtedly, these drugs have multiple actions related, in part, their ability to accumulate in lysosomes and autophagosomes of phagocytic cells as well as affecting MHC Class II expression and antigen presentation; actions of the production of pro-inflammatory cytokines [e.g. interleukin-1 (IL-1) tumour necrosis factor-α (TNFα)]; control of toll-like receptor-9 activation; and leucocyte generation of reactive oxygen species (ROS); i.e. antioxidant activity. The actions of these drugs on T and B cells are less clear but may depend on these leucocyte-mediated actions. Anti-malarials also protect against cytokine-mediated cartilage resorption. This and other actions may underlie the potential benefits in treating OA. The exact relationships of these various actions, mostly determined in vitro, have not been specifically defined in vivo or ex vivo in relation to clinical efficacy.

OUTCOMES

HCQ and CQ have a good reputation for being effective and relatively safe treatments in SLE, mild-moderate RA and Sjøgren's syndrome. There is need for (a) more information on their mode of action in relation to the control of these diseases, (b) scope for developing formulations that have improved pharmacokinetic and therapeutic properties and safety, and (c) further exploring their use in drug combinations not only with other disease modifying agents but also with biologics.

Health technology assessment of belimumab: a new monoclonal antibody for the treatment of systemic lupus erythematosus

Objective. Systemic lupus erythematosus (SLE) is treated with anti-inflammatory and immunosuppressive drugs and off-label biologics. Belimumab is the first biologic approved after 50 years as an add-on therapy for active disease. This paper summarizes a health technology assessment performed in Italy. Methods. SLE epidemiology and burden were assessed using the best published international and national evidences and efficacy and safety of belimumab were synthesized using clinical data. A cost-effectiveness analysis was performed by a lifetime microsimulation model comparing belimumab to standard of care (SoC). Organizational and ethical implications were discussed. Results. Literature review showed that SLE affects 47 per 100,000 people for a total of 28,500 patients in Italy, 50% of whom are affected by active form of the disease despite SoC. These patients, if autoantibodies and anti-dsDNA positive with low complement, are eligible for belimumab. SLE determines work disability and a 2–5-fold increase in mortality. Belimumab with SoC may prevent 4,742 flares in three years being cost-effective with an incremental cost-effectiveness ratio of €32,859 per quality adjusted life year gained. From the organizational perspective, the development of clear and comprehensive clinical pathways is crucial. Conclusions. The assessment supports the use of belimumab into the SLE treatment paradigm in Italy.

Top 10 clinical research developments in antiphospholipid syndrome

Persistently positive antiphospholipid antibodies (aPL) with thrombosis and/or pregnancy morbidity are a characteristic of antiphospholipid syndrome (APS). Although many challenges and controversies exist regarding APS diagnosis and management, there has been significant progress in APS clinical research in parallel with increased understanding of the pathogenesis. The purpose of this review is to discuss the "top ten" recent clinical developments in APS, including the magnitude of the problem, standardization of aPL tests, predictors of clinical events, diagnostic algorithms, new clinical research collaboration, and potential future treatments, e.g., new anticoagulants and immunosuppressive agents.

Social Determinants of Health, the Chronic Care Model, and Systemic Lupus Erythematosus

Systemic lupus erythematosus (SLE) is a chronic inflammatory rheumatic disease that disproportionately affects African Americans and other minorities in the USA. Public health attention to SLE has been predominantly epidemiological. To better understand the effects of this cumulative disadvantage and ultimately improve the delivery of care, specifically in the context of SLE, we propose that more research attention to the social determinants of SLE is warranted and more transdisciplinary approaches are necessary to appropriately address identified social determinants of SLE. Further, we suggest drawing from the chronic care model (CCM) for an understanding of how community-level factors may exacerbate disparities explored within social determinant frameworks or facilitate better delivery of care for SLE patients. Grounded in social determinants of health (SDH) frameworks and the CCM, this paper presents issues relative to accessibility to suggest that more transdisciplinary research focused on the role of place could improve care for SLE patients, particularly the most vulnerable patients. It is our hope that this paper will serve as a springboard for future studies to more effectively connect social determinants of health with the chronic care model and thus more comprehensively address adverse health trajectories in SLE and other chronic conditions.

Increased risk of death in African American patients with end-stage renal disease secondary to lupus

Background

Systemic lupus erythematosus (SLE) is a devastating systemic disease that can lead to end-stage renal disease (ESRD). Our goal was to assess the relative mortality risk associated with race in pediatric and adult populations with ESRD secondary to SLE maintained on hemodialysis (HD).

Methods

We identified an inception cohort of patients who were started on HD in January 1990 from data collected by the United States Renal Data System (USRDS). Kaplan–Meier survival analyses were performed in these patients using the time at risk from 1 January 1990 through 31 December 2010, the last date of the USRDS data collection period in this dataset. Cox proportional hazard models were used to assess mortality, adjusted for age at dialysis initiation. Subjects were censored at transplantation or end of follow-up.

Results

There were 1580 patients with ESRD secondary to SLE, 252 pediatric patients (62% African American) and 1328 adults (56% African American). African American pediatric patients with ESRD secondary to SLE had a 2-fold increased risk of death compared with African American children with other causes of ESRD [hazard ratio (HR): 2.1, 95% confidence interval (CI): 1.4–2.9, P < 0.01]. Increased risk of death was also seen in African American adults with ESRD secondary to SLE compared with both Caucasians with ESRD secondary to SLE (HR: 2.3, 95% CI: 1.2–4.2, P < 0.01) and African American adults with ESRD secondary to other diseases (HR: 1.2, 95% CI: 1.1–1.4, P < 0.01).

Conclusion

Our study suggests that there is a significant increased risk for mortality in African American children and adults with ESRD secondary to SLE. This suggests that African Americans with ESRD secondary to SLE need aggressive monitoring.

Predictors of self-reported health-related quality of life in systemic lupus erythematosus

OBJECTIVE

The Medical Outcomes Short Form-36 Survey (SF-36) has been widely used as a measure of health-related quality of life (HRQOL) in different populations. SLE patients have consistently reported lower scores compared with the general population. The objective of our study was to identify predictors of HRQOL using SF-36 among patients with SLE enrolled in a 2-year randomized controlled trial (RCT).

METHODS

We analysed 200 SLE patients enrolled in the Lupus Atherosclerosis Prevention Study (LAPS), an RCT of atorvastatin vs placebo, who completed SF-36 at qualifying, 12- and 24-month (final) visits.

RESULTS

At baseline, mean SF-36 domain scores were lower than those of age- and gender-matched population norms. There was no statistical difference reported between Physical Component Summary (PCS), Mental Component Summary and eight domain scores in the atorvastatin vs placebo group at 2 years. In multiple regression analyses, African American patients reported significantly lower scores in Physical Functioning compared with Caucasians. The presence of FM was significantly associated with lower scores in physical functioning, role physical, bodily pain, general health, vitality, social functioning and lower overall mean PCS scores. The Physician's Global Assessment of disease activity was associated with multiple SF-36 domains in univariate analysis.

CONCLUSION

This longitudinal study confirmed lower scores reported across all SF-36 domains. No one explanatory variable was independently associated with all domain scores. FM was independently associated with poorer HRQOL in most domains, underscoring the need for effective treatments for FM in SLE.

Pediatric lupus nephritis: more options, more chances?

Lupus nephritis (LN) is more common and severe in childhood-onset systemic lupus erythematosus (SLE) than in adults. It is one of the major causes of acute kidney injury (AKI) and chronic kidney disease (CKD) in children. Steroid therapy has been used as the first-line treatment for SLE since 1970, and has improved the survival of SLE patients from ∼ 50% to >80%. Over the years many immunosuppressive drugs, including pulse methylprednisolone, oral cyclophosphamide, pulse intravenous cyclophosphamide, mycophenolate mofitil, rituximab, and tacrolimus, have been combined with prednisolone, further improving survival rates to 90%-95%. However, the effectiveness of these drugs is still uncertain, as most seem very good in the beginning, but in studies examining longer-term follow-up the remission of disease does not remain. Fatal infection is still a major complication of aggressive chemotherapy, and the potential benefits as well as adverse events from each drug need to be considered. Induction of remission is the major aim of therapy, with safe and effective maintenance therapy for long-term remission. The survival rates of many published studies vary widely because of differences in patients and treatment modalities, severity of disease, renal histopathology, racial factors, and duration of follow-up. Finding the optimal treatment for SLE and related co-morbidities is highly challenging, and will likely involve a complex combination of different drugs for different patients in the search for giving them an opportunity to be free from this debilitating disease.

Lupus-prone strains vary in susceptibility to antibody-mediated end organ disease

Renal involvement is the major cause of morbidity and mortality in lupus. Besides autoantibodies, intrinsic renal factors may contribute to the susceptibility to lupus nephritis. To determine how different mouse strains that develop spontaneous lupus fare in their susceptibility to immune mediated nephritis, mice from six lupus-prone strains and two non-lupus control strains (B6 and BALB/c) were challenged with rabbit anti-GBM sera. Among the strains tested, NZM2410 (or NZM) mice developed severe glomerulonephritis (GN), whereas BXSB and B6.lpr, NZB mice were relatively resistant to anti-GBM disease, as were the BALB/c controls. BWF1 and B6.Yaa mice exhibited intermediate degrees of GN that was comparable to the B6 controls. The severity of the renal disease in these strains did not appear to be related to the degree of the systemic immune response to the administered rabbit Ig. In addition, cytokine profiling demonstrated differential urinary excretion of several molecules in the NZM mice, compared with the controls. Together with our previous reports, our studies demonstrate that lupus-prone strains vary in their susceptibility to immune mediated nephritis, despite similar levels of circulating autoantibodies and comparable degrees of immune complex deposition in the kidneys.

A longitudinal analysis of costs associated with change in disease activity in systemic lupus erythematosus

OBJECTIVES

To estimate the economic consequences of changes in disease activity on healthcare resource utilization (HRU) and costs.

METHODS

A retrospective longitudinal study of systemic lupus erythematosus (SLE) patients receiving care in a regional integrated health delivery system in the US from 01/2004 through 03/2011 was conducted using electronic health records, medical chart reviews, and claims. Eligible patients were ≥18 years old, with ≥1 rheumatologist-confirmed SLE diagnosis and ≥1 eligible rheumatology encounter. Patients were continuously enrolled ≥90 days before and ≥30 days after the encounters. Charts were manually reviewed to estimate SLEDAI scores. Average unit costs of each medical procedure, facility use, and prescription were estimated from a payer perspective (2011 USD) using a managed care claims database. HRU and costs were calculated for the 30-day period surrounding every SLEDAI score date (10 days before and 19 after). Relationships between HRU/costs and SLEDAI scores were estimated using mixed-effect models.

RESULTS

Overall, 178 SLE patients were included; mean age was 50.6 years, 91% were female, and 95.5% Caucasian. Patients had a total of 1343 encounters with SLEDAI scores over an average period of 1035 days. Reductions of SLEDAI scores were associated with reductions in HRU and costs. SLEDAI score reductions of 4-points were associated with reductions of 10% HRU and 14% costs over a 30-day period; reductions of 8-points had associated reductions of 19% HRU and 26% costs; and reductions of 10-points had associated reductions of 23% HRU and 31% costs. Annualized, changes in SLEDAI scores are associated with changes of $2485 (SLEDAI score change: 10-6), $4624 (10-2), and $5579 (10-0), respectively.

CONCLUSION

Reductions in disease activity were associated with substantial reductions of HRU and costs.

LIMITATIONS

Only short-term effects of disease activity change were investigated, disregarding other potential benefits of low disease activity on long-term organ damage prevention or comorbidities.

Effect of hydroxychloroquine treatment on pro-inflammatory cytokines and disease activity in SLE patients: data from LUMINA (LXXV), a multiethnic US cohort

OBJECTIVE

We sought to determine the effect of hydroxychloroquine therapy on the levels proinflammatory/prothrombotic markers and disease activity scores in patients with systemic lupus erythematosus (SLE) in a multiethnic, multi-center cohort (LUMINA).

METHODS

Plasma/serum samples from SLE patients (n = 35) were evaluated at baseline and after hydroxychloroquine treatment. Disease activity was assessed using SLAM-R scores. Interferon (IFN)-α2, interleukin (IL)-1β, IL-6, IL-8, inducible protein (IP)-10, monocyte chemotactic protein-1, tumor necrosis factor (TNF)-α and soluble CD40 ligand (sCD40L) levels were determined by a multiplex immunoassay. Anticardiolipin antibodies were evaluated using ELISA assays. Thirty-two frequency-matched plasma/serum samples from healthy donors were used as controls.

RESULTS

Levels of IL-6, IP-10, sCD40L, IFN-α and TNF-α were significantly elevated in SLE patients versus controls. There was a positive but moderate correlation between SLAM-R scores at baseline and levels of IFN-α (p = 0.0546). Hydroxychloroquine therapy resulted in a significant decrease in SLAM-R scores (p = 0.0157), and the decrease in SLAM-R after hydroxychloroquine therapy strongly correlated with decreases in IFN-α (p = 0.0087).

CONCLUSIONS

Hydroxychloroquine therapy resulted in significant clinical improvement in SLE patients, which strongly correlated with reductions in IFN-α levels. This indicates an important role for the inhibition of endogenous TLR activation in the action of hydroxychloroquine in SLE and provides additional evidence for the importance of type I interferons in the pathogenesis of SLE. This study underscores the use of hydroxychloroquine in the treatment of SLE.

Epidemiology and management of refractory lupus nephritis

Although the survival of patients with lupus nephritis (LN) has improved considerably in recent years, refractory LN appears in a substantial proportion of patients and, therefore, treatment of LN remains a real challenge today. We will use the term "refractory" LN, for those cases with none or partial response to first-line therapies. In this sense, numerous epidemiological factors, including racial, socioeconomic, histological and serological parameters, may influence treatment response and, therefore, may have an impact on the outcome of renal involvement. Initial conventional therapy will depend somewhat on these epidemiological factors. If this initial therapy fails, fortunately today we have alternative therapies that include the multitarget therapy and the use of biologics. Published evidence about these therapies is presented in this review. Important terms in the management of LN, such as the definition of complete response, partial response, sustained response and renal flare as well as the discrimination of different types of flare, are also discussed here according to the European consensus statement on the terminology used in the management of lupus glomerulonephritis.

Do Asian patients have worse lupus?

The predisposition to and clinical phenotype of systemic lupus erythematosus, an autoimmune disease that is associated with significant morbidity and mortality, are affected by genetic and environmental factors. This article aims to examine whether Asians have worse lupus by reviewing the literature on genetic predisposition and clinical outcomes, including major organ involvement, damage score and mortality in Asian populations compared with other ethnicities. A number of lupus nephritis susceptibility genes have been identified in Asians and White patients, with further variations among different Asian populations. Meta-analysis studies on various Fcγ receptor subtypes revealed that FcγRIIIA-F158 allele, which is associated with low binding affinity to IgG1 and IgG3, predisposed to lupus nephritis in Asian patients. Asian patients were reported to have higher rates of lupus nephritis-associated autoantibodies, lupus nephritis and more active glomerulonephritis compared with White patients. Renal outcome and the level of immunosuppressant use in Asians were comparable to Afro-American Blacks in some studies. Asians were also found to have higher overall damage scores compared with Whites. The difference in mortality between Asian patients and other ethnicities in different geographical regions was found to vary depending on socioeconomic factors such as access to health care. Poverty, education level, cultural and behavioural factors are confounders to ethnicity in determining clinical outcome of systemic lupus erythematosus.

Antiphospholipid syndrome treatment beyond anticoagulation: are we there yet?

Persistently positive antiphospholipid antibodies in association with thromboses and/or pregnancy morbidity is the hallmark of the antiphospholipid syndrome. The management of antiphospholipid antibody-positive patients has been focused on utilizing anti-thrombotic medications such as heparin or warfarin. Given that our understanding of the molecular mechanisms of antiphospholipid antibody-mediated thrombosis has been growing, it is highly likely that the current ‘anti-thrombotic’ approach to these patients will be replaced by an ‘immunomodulatory’ approach in the near future. This review article will address the experimental and/or clinical evidence behind some of these potential ‘immunomodulatory’ approaches (tissue factor inhibition, P38 mitogen-activated protein kinase inhibition, nuclear factor-κB inhibition, platelet glycoprotein receptor inhibition, hydroxychloroquine, statins, inhibition of β2GPI and/or anti-β2GPI binding to target cells, complement inhibition, and B cell inhibition) in antiphospholipid syndrome.

Prognostically distinct clinical patterns of systemic lupus erythematosus identified by cluster analysis

The objective of this study was to evaluate the patterns of clinical manifestations and their mortality in a large cohort of Chinese patients with systemic lupus erythematosus. The cumulative clinical manifestations of a large group of Chinese systemic lupus erythematosus patients who fulfilled at least four American College of Rheumatology criteria for systemic lupus erythematosus were studied. Patients were divided into distinct groups by using the K-mean cluster analysis. Clinical features, prevalence of proliferative lupus nephritis (World Health Organization class III, IV), autoantibody profile, and treatment data were compared and the standardized mortality ratios were calculated for each cluster of patients. There were 1082 patients included in the study (mean age at systemic lupus erythematosus diagnosis 30.5 years; mean systemic lupus erythematosus duration 10.3 years). Three distinct groups of patients were identified. Cluster 1 (n = 347) was characterized predominantly by mucocutaneous manifestations (malar rash, discoid rash, photosensitivity, oral ulcer) and arthritis but having the lowest prevalence of serositis, hematologic manifestations (hemolytic anemia, leukopenia, and thrombocytopenia), and proliferative lupus nephritis. Patients in cluster 2 (n = 409) had mainly renal and hematological manifestations but having the lowest prevalence of mucocutaneous manifestations. Pulmonary and gastrointestinal manifestations were significantly more frequent in cluster 2 than the other clusters. Cluster 3 patients (n = 326) had the most heterogeneous features. Besides having a high prevalence of mucocutaneous manifestations, serositis and hematologic manifestations, renal involvement, and proliferative lupus nephritis was also most prevalent among the three clusters. Patients in cluster 2 had a much higher standardized mortality ratio [standardized mortality ratio 7.23 (6.7—7.7), p < 0.001] than those in cluster 3 [standardized mortality ratio 1.27 (1.1—1.5), p = 0.005] and cluster 1 [standardized mortality ratio 0.95 (0.5—1.7), p = 0.86]. In conclusion, patients with systemic lupus erythematosus could be clustered into prognostically distinct patterns of clinical manifestations. Lupus (2009) 18, 1267—1275.

Prednisone, lupus activity, and permanent organ damage

OBJECTIVE

To estimate the effect of corticosteroids (prednisone dose) on permanent organ damage among persons with systemic lupus erythematosus (SLE).

METHODS

We identified 525 patients with incident SLE in the Hopkins Lupus Cohort. At each visit, clinical activity indices, laboratory data, and treatment were recorded. The study population was followed from the month after the first visit until June 29, 2006, or attainment of irreversible organ damage, death, loss to follow-up, or receipt of pulse methylprednisolone therapy. We estimated the effect of cumulative average dose of prednisone on organ damage using a marginal structural model to adjust for time-dependent confounding by indication due to SLE disease activity.

RESULTS

Compared with non-prednisone use, the hazard ratio of organ damage for prednisone was 1.16 (95% CI 0.54, 2.50) for cumulative average doses > 0-180 mg/month, 1.50 (95% CI 0.58, 3.88) for > 180-360 mg/month, 1.64 (95% CI 0.58, 4.69) for > 360-540 mg/month, and 2.51 (95% CI 0.87, 7.27) for > 540 mg/month. In contrast, standard Cox regression models estimated higher hazard ratios at all dose levels.

CONCLUSION

Our results suggest that low doses of prednisone do not result in a substantially increased risk of irreversible organ damage.

Controversies in the antiphospholipid syndrome: can we ever stop warfarin?

Patients with antiphospholipid syndrome are at increased risk for recurrent arterial and venous thrombosis and therefore benefit from long term warfarin therapy. The optimal duration of warfarin therapy after a first venous thromboembolic event is however a matter of some controversy and many questions remain unanswered. After reviewing and analysing the available evidence, we discuss some common scenarios in everyday clinical practice where treatment decisions are difficult.

Clinical and laboratory characteristics and long-term outcome of pediatric systemic lupus erythematosus: a longitudinal study

OBJECTIVES

To determine the frequency and characteristics of clinical signs, symptoms, laboratory findings, and medication use in children with pediatric systemic lupus erythematosus (pSLE) at presentation and during the course of the disease, and to examine correlations among disease manifestations, disease activity, and damage over time.

STUDY DESIGN

The study involved an analysis of medical records and the SLE database of an inception cohort of 256 patients with pSLE (female:male ratio, 4.7:1).

RESULTS

The most common clinical manifestations were arthritis (67%), malar rash (66%), nephritis (55%), and central nervous system (CNS) disease (27%). At diagnosis, patients with both renal and CNS disease had the highest SLE Disease Activity Index (SLEDAI) scores (P < .0001), but these scores were similar to those of the total group at 1 year (P = .11). Patients who developed renal and CNS disease more than 1 year after diagnosis had higher SLEDAI scores at disease onset. Some 34% of patients had Systemic Lupus International Collaborative Clinics Damage Index (SLICC-DI) scores >1 at a mean follow-up of 3.5 years. A greater proportion of patients with renal and CNS disease had SLICC-DI scores of >1, and these patients had higher mean scores compared with patients without major organ involvement (70% vs 11% [P < .0001] and 1.4 vs 0.1 [P < .0001], respectively).

CONCLUSIONS

Most of the patients in our cohort exhibited major organ involvement. These patients had the highest SLEDAI scores at diagnosis, which normalized at 1 year but preceded development of renal and CNS disease. The average SLICC-DI score was lower than that previously reported in patients with pSLE.

Ethnic and geographical differences in systemic lupus erythematosus: an overview

Systemic lupus erythematosus (SLE) is one of the most heterogeneous autoimmune disorders known. There is production of a variety of autoantibodies and patients present with a wide range of symptoms due to multiple organ involvement by the disease process. The underlying cause is not fully understood but it may involve genetic and environmental factors. It is interesting to note that while SLE is found worldwide, it is more commonly found in some countries, and within a country certain ethnic groups appear to be more susceptible to develop this condition than others. Additionally, the presentation and course of SLE appear highly variable between patients of different ethnic origins. For example, African-Americans and Orientals are believed to have a more severe disease than Caucasian whites. But are these ethnic and geographical differences real? If yes, they may provide investigators insight into the underlying pathoaetiology of this condition and pave the way to future research directions in lupus.