Disentangling the riddle of systemic lupus erythematosus with antiphospholipid syndrome: blood transcriptome analysis reveals a less-pronounced IFN-signature and distinct molecular profiles in venous versus arterial events

INTRODUCTION

Systemic lupus erythematosus with antiphospholipid syndrome (SLE-APS) represents a challenging SLE endotype whose molecular basis remains unknown.

METHODS

We analysed whole-blood RNA-sequencing data from 299 patients with SLE (108 SLE-antiphospholipid antibodies (aPL)-positive, including 67 SLE-APS; 191 SLE-aPL-negative) and 72 matched healthy controls (HC). Pathway enrichment analysis, unsupervised weighted gene coexpression network analysis and machine learning were applied to distinguish disease endotypes.

RESULTS

Patients with SLE-APS demonstrated upregulated type I and II interferon (IFN) pathways compared with HC. Using a 100-gene random forests model, we achieved a cross-validated accuracy of 75.6% in distinguishing these two states. Additionally, the comparison between SLE-APS and SLE-aPL-negative revealed 227 differentially expressed genes, indicating downregulation of IFN-α and IFN-γ signatures, coupled with dysregulation of the complement cascade, B-cell activation and neutrophil degranulation. Unsupervised analysis of SLE transcriptome identified 21 gene modules, with SLE-APS strongly linked to upregulation of the 'neutrophilic/myeloid' module. Within SLE-APS, venous thromboses positively correlated with 'neutrophilic/myeloid' and 'B cell' modules, while arterial thromboses were associated with dysregulation of 'DNA damage response (DDR)' and 'metabolism' modules. Anticardiolipin and anti-β2GPI positivity-irrespective of APS status-were associated with the 'neutrophilic/myeloid' and 'protein-binding' module, respectively.

CONCLUSIONS

There is a hierarchical upregulation and-likely-dependence on IFN in SLE with the highest IFN signature observed in SLE-aPL-negative patients. Venous thrombotic events are associated with neutrophils and B cells while arterial events with DDR and impaired metabolism. This may account for their differential requirements for anticoagulation and provide rationale for the potential use of mTOR inhibitors such as sirolimus and the direct fIIa inhibitor dabigatran in SLE-APS.

Pragmatic targets for moderate/severe SLE and their implications for clinical care and trial design: sustained DORIS or LLDAS for at least 6 months is sufficient while their attainment for at least 24 months ensures high specificity for damage-free progression

OBJECTIVES

Treatment targets in systemic lupus erythematosus (SLE) have been validated in unselected-in terms of severity-cohorts, which limits their generalisability. We assessed remission (Definition of Remission in SLE (DORIS)) and Lupus Low Disease Activity State (LLDAS) in a historical cohort of 348 patients with active moderate-to-severe disease and median follow-up of 5 years.

METHODS

Active SLE was defined as Physician Global Assessment ≥1.5 and/or SLE Disease Activity Index 2000 ≥6, requiring therapy intensification. DORIS/LLDAS, organ damage, flares and adverse events were monitored. Shared frailty survival, generalised linear models and K-means clustering were applied.

RESULTS

Sustained DORIS and LLDAS for ≥6 months occurred in 41.1% and 80.4%, respectively, and resulted in reduced damage accrual (HR: 0.58; 95% CI 0.36 to 0.93 and 0.61; 0.43 to 0.86) and severe flares (HR: 0.14; 0.08 to 0.27 and 0.19; 0.13 to 0.27). LLDAS without DORIS was also protective (HR: 0.65; 0.43 to 0.98 for damage, 0.49; 0.36 to 0.67 for flares). Models fitting increasing duration of targets showed that DORIS ≥50% and LLDAS ≥60% of time, or alternatively, ≥24 and ≥36 months, achieved optimal balance between feasibility (20.2-41.7%) and specificity (73.3-86.1%) for damage-free outcome. These targets were linked to reduced serious adverse events (risk ratio (RR): 0.56-0.71), hospitalisation (RR: 0.70) and mortality (RR: 0.06-0.13). Patients with predominant arthritis and mucocutaneous disease experienced reduced DORIS/LLDAS, compared with counterparts with major organ involvement. Conventional drugs were more frequently used in the former group, whereas potent immunosuppressive/biological agents in the latter.

CONCLUSIONS

In moderate-to-severe SLE, sustained DORIS/LLDAS for at least 6 months is sufficient, while attainment for at least 24 months ensures higher specificity for damage-free progression, thus facilitating treat-to-target strategies and clinical trials. Arthritis and skin disease represent unmet therapeutic needs that could benefit from novel biologics.

Therapeutic Strategies and Outcomes in Neuropsychiatric Systemic Lupus Erythematosus: An International Multicenter Retrospective Study

OBJECTIVES

The management of neuropsychiatric systemic lupus erythematosus (NPSLE) poses considerable challenges due to limited clinical trials. Therapeutic decisions are customized based on suspected pathogenic mechanisms and symptom severity. This study aimed to investigate therapeutic strategies and disease outcome for patients with NPSLE experiencing their first neuropsychiatric (NP) manifestation.

METHODS

This retrospective cohort study defined NP events according to the American College of Rheumatology case definition, categorizing them into three clusters: central/diffuse, central/focal and peripheral. Clinical judgment and a validated attribution algorithm were used for NP event attribution. Data included demographic variables, SLE disease activity index, cumulative organ damage, and NP manifestation treatments. The clinical outcome of all NP events was determined by a physician seven-point Likert scale. Predictors of clinical improvement/resolution were investigated in a multivariable logistic regression analysis.

RESULTS

The analysis included 350 events. Immunosuppressants and corticosteroids were more frequently initiated/escalated for SLE-attributed central diffuse or focal NP manifestations. At 12 months of follow-up, 64% of patients showed a clinical improvement in NP manifestations. Focal central events and SLE-attributed manifestations correlated with higher rates of clinical improvement. Patients with NP manifestations attributed to SLE according to clinical judgment and treated with immunosuppressants had a significantly higher probability of achieving clinical response (OR 2.55, 95%CI 1.06-6.41, p= 0.04). Age at diagnosis and focal central events emerged as additional response predictors.

CONCLUSION

NP manifestations attributed to SLE by clinical judgment and treated with immunosuppressants demonstrated improved 12-month outcomes. This underscores the importance of accurate attribution and timely diagnosis of NPSLE.

Diurnal production of cortisol and prediction of treatment response in rheumatoid arthritis: a 6-month, real-life prospective cohort study

OBJECTIVES

A reduced adrenal reserve-associated cortisol production relative to the enhanced needs of chronic inflammation (disproportion principle) has been observed in rheumatoid arthritis (RA). We examined the possible clinical value of diurnal cortisol measurements in active RA on treatment response prediction.

METHODS

Diurnal cortisol production (measured at: 08-12:00/18:00-22:00) was assessed by electrochemiluminescence immunoassay in 28 consecutive patients with moderately/highly active RA, as well as 3 and 6 months after treatment initiation or/escalation. Twenty-eight COVID-19 patients and 28 age-matched healthy individuals (HC) served as controls.

RESULTS

Saliva diurnal cortisol production in patients with RA was similar to that of HC, despite 12-fold higher serum C reactive protein (CRP) levels, and lower than COVID-19 patients (area under the curve: RA: 87.0±37.6 vs COVID-19: 146.7±14.3, p<0.001), having similarly high CRP. Moreover, a disturbed circadian cortisol rhythm at baseline was evident in 15 of 28 of patients with RA vs 4 of 28 and 20 of 28 of HC and COVID-19 patients, respectively. Treatment-induced minimal disease activity (MDA) at 6 months was achieved by 16 of 28 patients. Despite comparable demographics and clinical characteristics at baseline, non-MDA patients had lower baseline morning cortisol and higher adrenocorticotropic hormone (ACTH) levels compared with patients on MDA (cortisol: 10.9±4.0 vs 18.4±8.2 nmol/L, respectively, p=0.005 and ACTH: 4.8±3.3 vs 2.4±0.4 pmol/L, respectively, p=0.047). Baseline morning cortisol <13.9 nmol/L predicted non-MDA at 6 months (75% sensitivity, 92% specificity, p=0.006). Prospective measurements revealed that individualised diurnal cortisol production remained largely unchanged from baseline to 3 and 6 months.

CONCLUSIONS

An impaired adrenal reserve is present in patients with RA. Further studies to confirm that assessment of diurnal cortisol production may be useful in guiding treatment decisions and/or predicting treatment response in RA are warranted.

TRIAL REGISTRATION NUMBER

NCT05671627.

EULAR recommendations for the management of systemic lupus erythematosus: 2023 update

OBJECTIVES

To update the EULAR recommendations for the management of systemic lupus erythematosus (SLE) based on emerging new evidence.

METHODS

An international Task Force formed the questions for the systematic literature reviews (January 2018-December 2022), followed by formulation and finalisation of the statements after a series of meetings. A predefined voting process was applied to each overarching principle and recommendation. Levels of evidence and strengths of recommendation were assigned, and participants finally provided their level of agreement with each item.

RESULTS

The Task Force agreed on 5 overarching principles and 13 recommendations, concerning the use of hydroxychloroquine (HCQ), glucocorticoids (GC), immunosuppressive drugs (ISDs) (including methotrexate, mycophenolate, azathioprine, cyclophosphamide (CYC)), calcineurin inhibitors (CNIs, cyclosporine, tacrolimus, voclosporin) and biologics (belimumab, anifrolumab, rituximab). Advice is also provided on treatment strategies and targets of therapy, assessment of response, combination and sequential therapies, and tapering of therapy. HCQ is recommended for all patients with lupus at a target dose 5 mg/kg real body weight/day, considering the individual's risk for flares and retinal toxicity. GC are used as 'bridging therapy' during periods of disease activity; for maintenance treatment, they should be minimised to equal or less than 5 mg/day (prednisone equivalent) and, when possible, withdrawn. Prompt initiation of ISDs (methotrexate, azathioprine, mycophenolate) and/or biological agents (anifrolumab, belimumab) should be considered to control the disease and facilitate GC tapering/discontinuation. CYC and rituximab should be considered in organ-threatening and refractory disease, respectively. For active lupus nephritis, GC, mycophenolate or low-dose intravenous CYC are recommended as anchor drugs, and add-on therapy with belimumab or CNIs (voclosporin or tacrolimus) should be considered. Updated specific recommendations are also provided for cutaneous, neuropsychiatric and haematological disease, SLE-associated antiphospholipid syndrome, kidney protection, as well as preventative measures for infections, osteoporosis, cardiovascular disease.

CONCLUSION

The updated recommendations provide consensus guidance on the management of SLE, combining evidence and expert opinion.

Systemic Lupus Erythematosus and COVID-19

PURPOSE OF REVIEW

To describe the current state of knowledge regarding COVID-19 in patients with systemic lupus erythematosus (SLE). We focus on (i) SARS-CoV-2 vaccination uptake, immunogenicity and safety, and (ii) outcomes of COVID-19 in patients with SLE and pertinent risk factors for adverse sequelae.

RECENT FINDINGS

Notwithstanding the potential concern of patients about possible post-vaccination side-effects, the safety of anti-SARS-CoV-2 vaccines in patients with SLE has been undisputedly confirmed in numerous studies. Humoral immunogenicity is generally attained in SLE, although affected by the use of background immunosuppressive drugs, especially rituximab. The latter has also clearly been implicated with adverse COVID-19 outcomes in SLE, including need for hospitalization, mechanical ventilation and death. Although the wide adoption of vaccination has significantly improved COVID-19 outcomes, patients with SLE continue to pose challenges during the pandemic, mainly owing to administered immunosuppressive medications.

Transcriptomic and proteomic profiling reveals distinct pathogenic features of peripheral non-classical monocytes in systemic lupus erythematosus

Peripheral blood monocytes propagate inflammation in systemic lupus erythematosus (SLE). Three major populations of monocytes have been recognized namely classical (CM), intermediate (IM) and non-classical monocytes (NCM). Herein, we performed a comprehensive transcriptomic, proteomic and functional characterization of the three peripheral monocytic subsets from active SLE patients and healthy individuals. Our data demonstrate extensive molecular disruptions in circulating SLE NCM, characterized by enhanced inflammatory features such as deregulated DNA repair, cell cycle and heightened IFN signaling combined with differentiation and developmental cues. Enhanced DNA damage, elevated expression of p53, G0 arrest of cell cycle and increased autophagy stress the differentiation potential of NCM in SLE. This immunogenic profile is associated with an activated macrophage phenotype of NCM exhibiting M1 characteristics in the circulation, fueling the inflammatory response. Together, these findings identify circulating SLE NCM as a pathogenic cell type in the disease that could represent an additional therapeutic target.

Multidisciplinary approach to lupus nephritis: Clinical pearls, pitfalls, and positioning of newly-approved agents

Lupus nephritis (LN) is a major course of morbidity and mortality in patients with systemic lupus erythematosus (SLE), best managed by a multidisciplinary group. To this end, we gathered a group of rheumatologists, nephrologists and a nephropathologist to review current evidence regarding diagnosis and management of LN. In this consensus paper, we summarize the key points from this meeting and provide practice guidelines for the management of kidney involvement in SLE, in view of emerging new data concerning novel agents approved recently. Renal biopsy is indispensable for the management of LN. Yet, important pearls and pitfalls need to be considered regarding indications and interpretation, which are summarized in informative tables. In new-onset LN, experts agreed that, although belimumab may be added from disease onset, patients with moderate to severe proliferative nephritis (defined as: NIH activity index > 5 plus ≥ 1 of the following: (i) NIH chronicity index > 2, (ii) proteinuria > 3 g/24 h, and (iii) increase in serum creatinine > 20%) may be more likely to benefit the most. In all other patients who have already started standard-of-care treatment with either mycophenolate mofetil (MMF) or cyclophosphamide (CY), belimumab could be considered in cases with an inadequate clinical response by 3 months, or in cases that experience a nephritic flare following initial response, or have an inability to reduce the dose of glucocorticoids. In all circumstances, the drug should be given as add-on therapy, that is, in combination with a standard-of-care therapy (MMF or CY). Voclosporin could be considered for up to 3 years, in combination with MMF, in patients with heavy proteinuria (well above the nephrotic range), wherein a quick reduction of protein loss in urine is desirable to avoid the complications of the nephrotic syndrome, either as part of the initial regimen, or in cases of inadequate reduction of proteinuria with MMF. In view of the potential scarring effects, long-term administration beyond the first year requires further documentation.

Belimumab versus anifrolumab in adults with systemic lupus erythematosus: an indirect comparison of clinical response at 52 weeks

OBJECTIVE

To generate comparative efficacy evidence of belimumab versus anifrolumab in SLE that can inform treatment practices.

METHODS

The SLE Responder Index (SRI)-4 response at 52 weeks of belimumab versus anifrolumab was evaluated with an indirect treatment comparison. The evidence base consisted of randomised trials that were compiled through a systemic literature review.A feasibility assessment was performed to comprehensively compare the eligible trials and to determine the most appropriate indirect treatment comparison analysis method. A multilevel network meta-regression (ML-NMR) was implemented that adjusted for differences across trials in four baseline characteristics: SLE Disease Activity Index-2K, anti-double-stranded DNA antibody positive, low complement (C)3 and low C4. Additional analyses were conducted to explore if the results were robust to different sets of baseline characteristics included for adjustment, alternative adjustment methods and changes to the trials included in the evidence base.

RESULTS

The ML-NMR included eight trials: five belimumab trials (BLISS-52, BLISS-76, NEA, BLISS-SC, EMBRACE) and three anifrolumab trials (MUSE, TULIP-1, TULIP-2). Belimumab and anifrolumab were comparable in terms of SRI-4 response (OR (95% credible interval), 1.04 (0.74-1.45)), with the direction of the point estimate slightly favouring belimumab. Belimumab had a 0.58 probability of being the more effective treatment. The results were highly consistent across all analysis scenarios.

CONCLUSIONS

Our results suggest that the SRI-4 response of belimumab and anifrolumab are similar at 52 weeks in the general SLE population, but the level of uncertainty around the point estimate means we cannot rule out the possibility of a clinically meaningful benefit for either treatment. It remains to be seen if specific groups of patients could derive a greater benefit from anifrolumab or from belimumab, and there is certainly an unmet need to identify robust predictors towards more personalised selection of available biological agents in SLE.

Annals of the Rheumatic Diseases collection on lupus nephritis (2019-2022): novel insights and advances in therapy

No single organ has received as much attention in systemic lupus erythematosus (SLE) as the kidneys. During the period 2019-2022, the Annals of the Rheumatic Diseases published several original papers, brief reports and letters that further elucidate the pathogenesis and advance the management of LN. A selection of representative original papers is highlighted in this review.

Restoration of aberrant gene expression of monocytes in systemic lupus erythematosus via a combined transcriptome-reversal and network-based drug repurposing strategy

BACKGROUND

Monocytes -key regulators of the innate immune response- are actively involved in the pathogenesis of systemic lupus erythematosus (SLE). We sought to identify novel compounds that might serve as monocyte-directed targeted therapies in SLE.

RESULTS

We performed mRNA sequencing in monocytes from 15 patients with active SLE and 10 healthy individuals. Disease activity was assessed with the Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2 K). Leveraging the drug repurposing platforms iLINCS, CLUE and L1000CDS², we identified perturbagens capable of reversing the SLE monocyte signature. We identified transcription factors and microRNAs (miRNAs) that regulate the transcriptome of SLE monocytes, using the TRRUST and miRWalk databases, respectively. A gene regulatory network, integrating implicated transcription factors and miRNAs was constructed, and drugs targeting central components of the network were retrieved from the DGIDb database. Inhibitors of the NF-κB pathway, compounds targeting the heat shock protein 90 (HSP90), as well as a small molecule disrupting the Pim-1/NFATc1/NLRP3 signaling axis were predicted to efficiently counteract the aberrant monocyte gene signature in SLE. An additional analysis was conducted, to enhance the specificity of our drug repurposing approach on monocytes, using the iLINCS, CLUE and L1000CDS² platforms on publicly available datasets from circulating B-lymphocytes, CD4⁺ and CD8⁺ T-cells, derived from SLE patients. Through this approach we identified, small molecule compounds, that could potentially affect more selectively the transcriptome of SLE monocytes, such as, certain NF-κB pathway inhibitors, Pim-1 and SYK kinase inhibitors. Furthermore, according to our network-based drug repurposing approach, an IL-12/23 inhibitor and an EGFR inhibitor may represent potential drug candidates in SLE.

CONCLUSIONS

Application of two independent - a transcriptome-reversal and a network-based -drug repurposing strategies uncovered novel agents that might remedy transcriptional disturbances of monocytes in SLE.

Relapses are common in severe hematologic systemic lupus erythematosus and may be prevented by early institution of immunosuppressive agents: Α real-life single-center study

BACKGROUND

Hematologic manifestations are common in systemic lupus erythematosus (SLE), either at initial presentation or during the course of the disease, but data regarding their natural history are scarce.

OBJECTIVE

To describe the characteristics, treatments, and outcomes of severe hematological manifestations in a large cohort of lupus patients.

METHODS

Retrospective cohort study of patients in the "Attikon" lupus cohort who had a history of a severe hematologic manifestation, defined as autoimmune hemolytic anemia (AIHA) with hemoglobin < 8 g/dL, thrombocytopenia with platelet count < 30,000/mm³, Evans syndrome with hemoglobin < 8 g/dL, and/or platelet count < 30,000/mm³, neutropenia with < 500 neutrophils/mm³, thrombotic microangiopathy (TMA)/thrombotic thrombocytopenic purpura (TTP)-like syndrome, or macrophage activation syndrome (MAS). Demographic and clinical characteristics, treatments, and outcomes were recorded.

RESULTS

From over 300 patients with hematologic manifestations, 41 qualified as severe (70.7% women, mean [SD] age at SLE diagnosis 42.6 [18.0] years). Hematologic manifestations preceded SLE diagnosis in 13 patients (31.7%), was concomitant to SLE diagnosis in 16 patients (39%), and occurred during the course of the disease in 12 (29.3%) patients, with a mean (SD) disease duration of 8.7 (5.5) years. Thrombocytopenia was the most common severe hematological manifestation (56.1%), followed by AIHA (17.1%) and TTP-like syndrome (12.2%). For initial treatment, all patients were treated with glucocorticoids (GC), while rituximab and cyclophosphamide were the most frequently used immunosuppressive agents. Following initial treatment, relapse occurred in 22 patients (53.7%). Compared to patients that did not relapse, those that relapsed had less often received concomitant immunosuppressive agents following treatment of initial episode (n = 17/23, 73.9% vs 5/17, 29.4%, p = 0.005).

CONCLUSION

Severe hematologic disease in SLE has a high risk of relapse, which may be mitigated by the early institution of GC-sparing agents.

Clinical response trajectories and drug persistence in systemic lupus erythematosus patients on belimumab treatment: A real-life, multicentre observational study

Objective

To obtain real-world data on outcomes of belimumab treatment and respective prognostic factors in patients with systemic lupus erythematosus (SLE).

Methods

Observational study of 188 active SLE patients (median disease duration 6.2 years, two previous immunosuppressive/biological agents) treated with belimumab, who were monitored for SLEDAI-2K, Physician Global Assessment (PGA), LLDAS (lupus low disease activity state), remission (DORIS/Padua definitions), SELENA-SLEDAI Flare Index, SLICC/ACR damage index and treatment discontinuations. Group-based disease activity trajectories were modelled followed by multinomial regression for predictive variables. Drug survival was analysed by Cox-regression.

Results

At 6, 12 and 24 months, LLDAS was attained by 36.2%, 36.7% and 33.5%, DORIS-remission by 12.3%, 11.6% and 17.8%, and Padua-remission by 21.3%, 17.9% and 29.0%, respectively (attrition-corrected). Trajectory analysis of activity indices classified patients into complete (25.5%), partial (42.0%) and non-responder (32.4%) groups, which were predicted by baseline PGA, inflammatory rash, leukopenia and prior use of mycophenolate. During median follow-up of 15 months, efficacy-related discontinuations occurred in 31.4% of the cohort, especially in patients with higher baseline PGA (hazard ratio [HR] 2.78 per 1-unit; 95% CI 1.32-5.85). Conversely, PGA improvement at 3 months predicted longer drug retention (HR 0.57; 95% CI 0.33-0.97). Use of hydroxychloroquine was associated with lower risk for safety-related drug discontinuation (HR 0.33; 95% CI 0.13-0.85). Although severe flares were reduced, flares were not uncommon (58.0%) and contributed to treatment stops (odds ratio [OR] 1.73 per major flare; 95% CI 1.09-2.75) and damage accrual (OR 1.83 per mild/moderate flare; 95% CI 1.15-2.93).

Conclusions

In a real-life setting with predominant long-standing SLE, belimumab was effective in the majority of patients, facilitating the achievement of therapeutic targets. Monitoring PGA helps to identify patients who will likely benefit and stay on the treatment. Vigilance is required for the prevention and management of flares while on belimumab.

ATR-mediated DNA damage responses underlie aberrant B cell activity in systemic lupus erythematosus

B cells orchestrate autoimmune responses in patients with systemic lupus erythematosus (SLE), but broad-based B cell-directed therapies show only modest efficacy while blunting humoral immune responses to vaccines and inducing immunosuppression. Development of more effective therapies targeting pathogenic clones is a currently unmet need. Here, we demonstrate enhanced activation of the ATR/Chk1 pathway of the DNA damage response (DDR) in B cells of patients with active SLE disease. Treatment of B cells with type I IFN, a key driver of immunity in SLE, induced expression of ATR via binding of interferon regulatory factor 1 to its gene promoter. Pharmacologic targeting of ATR in B cells, via a specific inhibitor (VE-822), attenuated their immunogenic profile, including proinflammatory cytokine secretion, plasmablast formation, and antibody production. Together, these findings identify the ATR-mediated DDR axis as the orchestrator of the type I IFN-mediated B cell responses in SLE and as a potential novel therapeutic target.

Residual disease activity and treatment intensification in systemic lupus erythematosus: A cross-sectional study to quantify the need for new therapies

OBJECTIVE

The proportion of SLE patients with residual disease activity in routine settings is variable. We assessed disease activity state in patients during their most recent visit, and whether patients with residual activity were offered therapy intensification.

METHODS

Cross-sectional study of consecutive lupus patients in three tertiary centers. Patients were categorized as: i) remission off-therapy, ii) remission on-therapy, iii) low disease activity, and iv) non-optimally controlled disease. Multivariable regression identified factors associated with treatment intensification and ROC analysis calculated the accuracy of SLEDAI-2K to predict this intensification.

RESULTS

Three hundred and thirty-two patients were included [93.1% female, mean (SD) age 48.5 (14.7) years, median (IQR) disease duration 6.5 (12.4) years]. Mean (SD) total and clinical SLEDAI at last visit were 3.7 (3.0) and 3.0 (2.9), respectively. Although 23.2% of patients were in remission, 40.1% were categorized as non-optimally controlled disease (79.2% due to SLEDAI-2K > 4), but less than 50% of them were offered therapy intensification. Proteinuria (OR 6.78, 95% CI 2.06-22.25), arthritis (OR 5.48, 95% CI 3.20-9.40), and rash (OR 3.23, 95% CI 1.81-5.75) were associated with intensification of therapy, but the accuracy of either total or clinical SLEDAI to predict it was moderate (ROC area under the curve 0.761 and 0.779, respectively).

CONCLUSIONS

About 40% of patients have evidence of residual disease activity and could qualify for novel treatments. Most treatment changes were triggered by active renal, joint, and skin disease, whereas the predictive value of SLEDAI-2K as a metric of disease activity was modest.

Chilblains After SARS-CoV-2 Vaccination: Coincidence or Real Association?

We read with great interest the article of Meara et al¹ in your journal describing a case of chilblain-like lesions after vaccination against SARS-CoV-2. Since the start of the coronavirus disease 2019 (COVID-19) pandemic, millions of vaccine doses have been administered and their safety has been generally confirmed.

Cross-species transcriptome analysis for early detection and specific therapeutic targeting of human lupus nephritis

Objectives

Patients with lupus nephritis (LN) are in urgent need for early diagnosis and therapeutic interventions targeting aberrant molecular pathways enriched in affected kidneys.

Methods

We used mRNA-sequencing in effector (spleen) and target (kidneys, brain) tissues from lupus and control mice at sequential time points, and in the blood from 367 individuals (261 systemic lupus erythematosus (SLE) patients and 106 healthy individuals). Comparative cross-tissue and cross-species analyses were performed. The human dataset was split into training and validation sets and machine learning was applied to build LN predictive models.

Results

In murine SLE, we defined a kidney-specific molecular signature, as well as a molecular signature that underlies transition from preclinical to overt disease and encompasses pathways linked to metabolism, innate immune system and neutrophil degranulation. The murine kidney transcriptome partially mirrors the blood transcriptome of patients with LN with 11 key transcription factors regulating the cross-species active LN molecular signature. Integrated protein-to-protein interaction and drug prediction analyses identified the kinases TRRAP, AKT2, CDK16 and SCYL1 as putative targets of these factors and capable of reversing the LN signature. Using murine kidney-specific genes as disease predictors and machine-learning training of the human RNA-sequencing dataset, we developed and validated a peripheral blood-based algorithm that discriminates LN patients from normal individuals (based on 18 genes) and non-LN SLE patients (based on 20 genes) with excellent sensitivity and specificity (area under the curve range from 0.80 to 0.99).

Conclusions

Machine-learning analysis of a large whole blood RNA-sequencing dataset of SLE patients using human orthologs of mouse kidney-specific genes can be used for early, non-invasive diagnosis and therapeutic targeting of LN. The kidney-specific gene predictors may facilitate prevention and early intervention trials.

POS0122 CENTRAL NERVOUS SYSTEM DEMYELINATING SYNDROMES IN SYSTEMIC LUPUS ERYTHEMATOSUS: RESULTS FROM “ATTIKON” LUPUS COHORT

Background

Central nervous system (CNS) demyelinating syndromes that occur in the context of SLE may represent a manifestation of neuropsychiatric lupus, or an overlap of SLE and multiple sclerosis (MS). The differential diagnosis between the two entities has important clinical implications, because the therapeutic management differs between the two conditions.

Objectives

To characterize CNS demyelinating syndromes in a large SLE cohort as neuropsychiatric SLE or SLE-MS overlap, using a multidisciplinary approach and existing diagnostic (MS) and classification criteria (SLE)

Methods

Patients from the “Attikon” lupus cohort (n=707) were evaluated for demyelinating syndromes. Clinical, laboratory and neuroimaging data were recorded for each patient. Following multidisciplinary evaluation and application of criteria, the demyelinating syndrome was attributed to either SLE or MS. Patients with transverse myelitis were not included in this study.

Results

We identified 26 patients with demyelinating syndromes (3.7%) with mean age at diagnosis 46.9 (SD 12.3) years and median disease duration at last follow-up 60 (IQR 52) months. Of them, 12 were diagnosed as primary SLE-demyelination (46.2%) and 14 as overlap SLE-MS (53.8%). The two groups did not differ with respect to rheumatologic and neurologic manifestations, or serologic findings (ANA, dsDNA, C3/C4, aPL, ENA). SLE patients with demyelination manifested mild extra-CNS disease mainly involving joints and skin, while severe non-CNS manifestations were rare. However, patients with SLE-demyelination were less likely to have elevated IgG index (OR 0.055 95% CI: 0.008-0.40) and positive oligoclonal bands (OR 0.09 95% CI: 0.014-0.56). SLE patients with primary demyelinating syndrome were less likely to exhibit brain lesions in the spinal cord, infratentorial, periventricular and juxtacortical regions. A single brain region was affected in 9 SLE-demyelination patients (75%), while all MS-SLE patients had multiple affected brain regions. MS-SLE overlap was associated with increased likelihood of neurologic relapses (OR 18.2, 95% CI: 1.76-188), while SLE-demyelination patients were less likely to exhibit neurological deficits (EDSS>0) at last follow-up visit (50% vs. 78.6%in SLE-MS, respectively).

Conclusion

Demyelination in the context of SLE follows a more benign course compared to a frank SLE-MS overlap. Prolongation of follow-up will ascertain whether SLE-demyelination patients evolve to MS, or this is a bona fide NPSLE syndrome.

Disclosure of Interests

None declared

AB0238 HEALTH-RELATED QUALITY OF LIFE AND CORRELATION WITH DISEASE ACTIVITY IN PATIENTS WITH RHEUMATOID ARTHRITIS

Background

Patients with active rheumatoid arthritis (RA) are at risk for poor functional outcomes, affecting quality of life (QoL). SF-36 is a validated instrument to measure health-related quality of life (HRQoL) in various domains of physical and mental health1, and has been validated in RA. Nevertheless, data on the impact of RA disease activity on SF-36 scores in Greek patients are lacking.

Objectives

To compare SF-36 scores in Greek RA patients versus the general population and to assess the impact of disease activity on HRQoL.

Methods

Cross-sectional study in RA patients followed in the Department of Rheumatology, Asklepieio Voulas General Hospital (05-10/2021). Demographic characteristics, state of disease activity and current treatment for RA were recorded at most recent visit. All patients completed SF-36 questionnaires and were classified in three subgroups of DAS28-disease activity: i) Remission or Low disease activity (LDA), ii) Moderate disease activity (MDA), and iii) High disease activity (HDA). Data from the SF-36 validation study in the Greek general population with 1007 participants, were used as historical controls2. Descriptive statistics, one-way ANOVA and linear regression were used for statistical analyses.

Results

107 patients participated in the study (80,4% females, mean (SD) age 63.3 (12.1) years, 64.5% seropositive, 72% overweight or obese). One third (n=36) were active smokers and 63% (n=67) were receiving a biologic disease modifying antirheumatic drug (bDMARD).

Patients with RA exhibited low scores in all SF-36 domains and reported significantly worse results compared to the general population (Figure 1).

Figure 1.

Physical component score (PCS) and Mental component score (MCS) of the SF-36 showed a negative correlation with DAS28 (β= -8.28, p= <0.001 and β= -6.2, p= <0.001, respectively). Patients with remission or LDA exhibited better SF-36 scores compared to the other subgroups; moreover, patients with MDA had better SF-36 scores than those with HDA (Table 1). When patients with MDA were further divided into low- and high-moderate disease activity (DAS28: 3,21-4,19 and 4,2-5,1, respectively), no significant difference in any SF-36 domain was found between the two groups.

Table 1.SF-36 domain mean±SDRDA or LDA 51%MDA 37,2%HAD 11,7%p-valuePF48,43 ±34,2332,14 ±19,8320 ± 19,750.003RP34,9 ±43,6820,71 ± 32,920 ± 00.015BP51,2 ±30,4728,24 ± 24,4918,86 ± 23,54<0.001GH48,83 ±4541,57 ± 24,2532,27 ± 19,540.043VT49,48 ±22,2234,14 ± 18,5730,91 ± 15,940.001SF52,16 ±35,3340,36 ± 27,1328,41 ± 14,890.041RE39,01 ±44,6827,62 ± 40,8118,18 ± 34,520.246MH54,08 ±23,2447,57 ± 21,7540 ± 18,590.124

Conclusion

HRQoL assessed by SF-36 is dampened in RA patients, in both physical and mental component. Disease activity had a negative impact on both physical and mental components of HRQoL. Patients with remission or LDA showed better HRQoL outcomes, suggesting that the treat-to-target approach may also positively affect QoL.

References

[1]Ware, J. E., Jr, & Gandek, B. (1998) Journal of clinical epidemiology, 51(11), 903–912.

[2]Pappa E et al. Qual Life Res. 2005 Jun;14(5):1433-8

Disclosure of Interests

None declared

POS0210 A PREDOMINANT NON-SPECIFIC INTERSTITIAL PNEUMONIA PATTERN AND ABERRANT TRANSCRIPTOMIC NEUTROPHIL-MEDIATED IMMUNITY CHARACTERIZE A CONTEMPORARY RA-ILD COHORT

Background

Lung involvement is the most common extra-articular manifestation. Rheumatoid arthritis related interstitial lung disease (RA-ILD) comprises a heterogeneous group of parenchymal lung disorders classified by distinct clinical, pathologic, and radiographic features. According to the current paradigm, circulating immune complexes and aberrant neutrophil extracellular trap formation (NETosis) contribute to disease pathogenesis.

Objectives

To characterize the pattern of lung disease in “Attikon” RA-ILD cohort and develop insights about the pathophysiologic mechanisms via whole blood RNA sequencing.

Methods

Retrospective and prospective study to identify clinical, laboratory and radiologic characteristics of patients with RA and pulmonary manifestations in the “Attikon” RA-ILD cohort. Changes in pulmonary function tests (PFTs), pattern of lung involvement (chest HRCT), disease activity (DAS28-ESR) and incidence of complications and comorbidities, were prospectively analyzed during the one-year follow-up period. Peripheral blood was collected in a subset of RA-ILD (n=11) and control RA patients (n=9) for RNA isolation and RNA sequencing. The gene expression profile of RA-ILD was inferred through differential gene expression analysis, followed by pathway and enrichment analyses.

Results

114 patients with RA-ILD were included [67% female, mean (SD) age at diagnosis 71.5 (9) years, 58% seropositive]. Non-specific interstitial pneumonia (NSIP) was the radiologic pattern most frequently observed (52%), followed by usual interstitial pneumonia (UIP) (24%). RA was diagnosed after ILD in 40% of patients. Mean (SD) FVC and DLCOsb at baseline was 80.5 (19.2) and 55.4 (19.5), respectively. Disease activity was lower in seropositive compared to seronegative both at baseline and at 1-year follow-up (p=0.025). PFTs at 12 months from baseline had been stabilized. Respiratory infections were observed in 17.6% of patients during the first year of follow-up, more common in the NSIP vs UIP group (p=0.01), possibly due to the higher doses of glucocorticoids in NSIP patients. RNA-sequencing analysis revealed a distinct gene expression profile in RA-ILD, characterized by the activation of type I interferon response, neutrophil activation and degranulation, and CCR1 chemokine interactions.

Conclusion

NSIP is the most frequent pattern of ILD in this RA-ILD cohort, carrying a higher risk for respiratory infections probably related to higher doses of glucocorticoid used. Myeloid cells’ migration via CCR1 and the formation of pro-inflammatory and pro-fibrotic NETs by activated neutrophils may contribute to RA-ILD pathogenesis.

References

[1]Y Dai et al, Rheumatoid arthritis–associated interstitial lung disease: an overview of epidemiology, pathogenesis and management Clin Rheumatol. 2021 Apr;40(4):1211-1220

[2]X Zulma Yunt et al, Lung Disease in Rheumatoid Arthritis Rheum Dis Clin North Am. 2015 May;41(2):225-36

Table 1.

Patients’ characteristics with RA-ILD in Attikon cohort

Patients CharacteristicsN=114Mean age71.5±9Female: Male76/38Smoking (current/ex)23/43Arterial hypertension71Diabetes mellitus32Dyslipidemia52COPD/BA17Thyroid disease30Latent TB17Seropositive66Diagnosis RA before ILD34Diagnosis RA after ILD45NSIP59UIP27Mixed NSIP-UIP5Organizing Pneumonia (OP)17Nodules21

Disclosure of Interests

None declared

POS0366 MODERATE RATES OF TREATMENT INTENSIFICATION IN SLE PATIENTS WITH RESIDUAL DISEASE ACTIVITY

Background

The treat-to-target (T2T) strategy has gained significant attention in SLE,1 while EULAR has set remission or low disease activity as the goal of treatment.2 Nevertheless, the degree to which T2T is followed in real-life clinical settings has not been extensively studied.

Objectives

To assess the proportion of lupus patients with residual disease activity that had their therapy intensified during their most recent visit, identify associated factors, and assess the validity of the SLEDAI-2k as a predictor of this intensification.

Methods

Cross-sectional study of SLE patients who were evaluated in three tertiary centers in Greece during their last visit. Patients were categorized in four disease activity states (remission on and off treatment, low disease activity and non-optimally controlled), according to definitions used in previous studies.3 Intensification of treatment was defined as addition/increase of glucocorticoids (GC) or addition/increase of immunosuppressive (IS) agent (conventional or biologic). Logistic regression analysis was used to identify factors associated with treatment intensification and ROC analysis tο calculate sensitivity, specificity of different SLEDAI-2k cut-off values to predict this escalation.

Results

332 patients were included [93.1% female, mean (SD) age 48.5 (14.7) years, median (IQR) disease duration 6.5 (12.4) years]. Regarding disease activity states, 23.2% (n=77) of patients were in remission (off or on therapy), 36.7% (n=122) were in LDA, while 40.1% (n=133) were categorized as non-optimally controlled disease.

Within patients with residual disease activity, therapy intensification was offered to 25.8% and 48.9% of those with low disease activity and non-optimally controlled disease, respectively. In multivariable analysis, proteinuria (OR 6.78, 95% CI 2.06 – 22.25), arthritis (OR 5.48, 95% CI 3.20 - 9.40) and rash (OR 3.23, 95% CI 1.81 - 5.75), were associated with intensification of therapy. The AUC of the ROC analysis for total SLEDAI-2k to predict therapy escalation was 0.761, indicating only fair accuracy; the cut-off value with the best combination of sensitivity and specificity was 3 (sensitivity 87%, with a specificity of 55%). For clinical SLEDAI-2k, the respective AUC was marginally better (0.779), with a cut-off of 3 being associated with the best sensitivity (80%), with compromised specificity (64%). (Figure 1).

Figure 1.

ROC analysis of total and clinical SLEDAI to predict any increase in therapy

Conclusion

In real-life clinical settings, no therapy intensification was offered in more than half of patients categorized as non-optimally controlled disease. Total and clinical SLEDAI-2k showed only fair accuracy to predict therapy escalation, reflecting the role of additional parameters in the decision to escalate therapy in an individual patient.

References

[1]van Vollenhoven RF, Mosca M, Bertsias G, et al. Treat-to-target in systemic lupus erythematosus: recommendations from an international task force. Ann Rheum Dis 2014; 73: 958–967.

[2]Fanouriakis A, Kostopoulou M, Alunno A, et al. 2019 update of the EULAR recommendations for the management of systemic lupus erythematosus. Ann Rheum Dis 2019; 78: 736–745.

[3]Ugarte-Gil MF, Wojdyla D, Pons-Estel GJ, et al. Remission and Low Disease Activity Status (LDAS) protect lupus patients from damage occurrence: data from a multiethnic, multinational Latin American Lupus Cohort (GLADEL). Ann Rheum Dis 2017; 76: 2071–2074.

Disclosure of Interests

None declared

POS0781 RESIDUAL DISEASE ACTIVITY IN SLE: A REAL-LIFE CROSS-SECTIONAL STUDY IN THREE TERTIARY CENTRES TO EXPLORE THE ROOM FOR NOVEL THERAPIES

Background

According to updated EULAR recommendations, the goal of treatment in systemic lupus erythematosus (SLE) should be remission or low disease activity in all organ systems, achieved with the least possible dose of glucocorticoids.1 The proportion of patients achieving these two activity states under conventional therapies may vary between different patient cohorts and clinical settings.

Objectives

To assess the current disease activity state of SLE patients during their most recent visit in three tertiary centres experienced in the management of SLE.

Methods

In a cross-sectional study, patients were categorized as: 1) Remission off-therapy: SLE Disease Activity Index (SLEDAI)=0 without glucocorticoids (GC) or immunosuppressive drugs (IS), 2) Remission on-therapy: SLEDAI=0, GC ≤5mg/day prednisone (Pz) and/or IS (conventional and biologic, maintenance phase), 3) Low disease activity (LDA): SLEDAI ≤4, Pz ≤7.5mg/day and/or IS (maintenance phase), 4) Active/Non-optimally controlled: SLEDAI >4 and/or Pz >7.5mg/day and/or IS (induction phase).2 Hydroxychloroquine (HCQ) was allowed in all groups.

Results

A total of 332 patients were included [93.1% female, mean (SD) age 48.5 (14.7) years, median (IQR) disease duration 6.5 (12.4) years]. 81% (n=269) of patients were on HCQ and 69.6% (n=231) were receiving an additional IS at last visit. Regarding glucocorticoids (GC), almost half of our patients (48.2%, n=160) were not receiving any GC and of those receiving, only 7.8% (n=26) were receiving a Pz dose > 7.5 mg/day.

Mean (SD) total and clinical SLEDAI were 3.7 (3.0) and 3.0 (2.9), respectively. At their most recent visit, 33.7% (n=112) of patients had no clinical activity (clinical SLEDAI=0) and 24.4% (n=81) had neither clinical nor serological activity (total SLEDAI=0). 31.6% and 49.1% of patients had a total SLEDAI-2K ≥6 and a clinical SLEDAI-2K ≥4, respectively (Table 1). Regarding disease activity states, 23.2% (n=77) of patients were in remission (off or on therapy), 36.7% (n=122) were in LDA, while 40.1% (n=133) were categorized as non-optimally controlled. In the latter group, a total SLEDAI > 4 was present in most of patients (79.2% vs. 21.9% for prednisone > 7.5 mg/day and 19.8% for IS at induction regimen). In patients with LDA or non-optimally controlled disease, activity was mainly driven by the mucocutaneous and musculoskeletal components of SLEDAI, along with serologic activity (Figure 1). The latter was more common in LN patients. Overall, 83 patients (25.0%) in our cohort had evidence of serologic activity, of whom 31 (9.3% of total) had a clinical SLEDAI of 0.

Table 1.

Distribution of patients based on total and clinical SLEDAI-2K score at most recent visit

Total SLEDAIClinical SLEDAIScorePatients, n(%)ScorePatients, n(%)081(24.4)0112(33.7)1-5146(44)1-357(17.2)6-10101(30.4)4-8154(46.5)>104(1.2)>89(2.7)Figure 1.

Components of SLEDAI-2K at most recent visit (total cohort of patients and patients with LN)

Conclusion

Although a significant proportion of our patients were on HCQ and additional IS, about 40% of them were not in optimal control. Yet, residual disease activity, based on SLEDAI-2K, was moderate, compared to relatively high mean baseline SLEDAI-2K of lupus trials. These data provide a pragmatic view of lupus patients, who could be potential candidates for novel treatments or inclusion in clinical trials.

References:

[1]Fanouriakis A, Kostopoulou M, Alunno A, et al. 2019 update of the EULAR recommendations for the management of systemic lupus erythematosus. Ann Rheum Dis 2019; 78: 736–745.

[2]Ugarte-Gil MF, Wojdyla D, Pons-Estel GJ, et al. Remission and Low Disease Activity Status (LDAS) protect lupus patients from damage occurrence: data from a multiethnic, multinational Latin American Lupus Cohort (GLADEL). Ann Rheum Dis 2017; 76: 2071–2074.

Disclosure of Interests

None declared

Real-Life Outcome of Lupus Nephritis with Current Therapies: Study Protocol of a Multicentre Observational Study

Lupus nephritis (LN) affects a significant proportion of patients with systemic lupus erythematosus (SLE) and is characterised by increased morbidity and mortality. The updated joint EULAR/European Renal Association-European Dialysis and Transplant Association (ERA-EDTA) recommendations for the management of LN have set as target of therapy the optimisation (preservation or improvement) of kidney function, accompanied by a reduction in proteinuria of at least 25% by 3 months, 50% by 6 months, and below 500-700 mg/g by 12 months (complete clinical response). It is currently unknown what proportion of Greek patients with LN reach these proposed targets with the current available treatments. At the same time, recent successful phase 3 trials have led to the approval of both belimumab and voclosporin for the treatment of patients with LN and have steered discussions as to whether the "induction-maintenance" paradigm should be substituted by an early combination treatment for all patients. To inform future therapeutic decisions and facilitate the positioning of these new drugs in the therapeutic algorithm of LN, the current study protocol aims to map the unmet needs in the treatment of LN in Greece, by quantifying the proportion of patients who attain the recommended treatment targets in everyday clinical practice.

POS0365 RELAPSES ARE COMMON ΙΝ SEVERE HEMATOLOGICAL SLE: REAL-LIFE EXPERIENCE FROM THE “ATTIKON” LUPUS COHORT

Background

Hematological manifestations are common in systemic lupus erythematosus (SLE), and are thought to result from immune-mediated peripheral cell destruction or bone marrow failure(1,2).

Objectives

To assess the clinical characteristics and outcomes of severe hematological disease in a large cohort of lupus patients.

Methods

Retrospective analysis of the “Attikon” lupus cohort (over 800 patients total) (3) for the identification of patients with a history of severe hematological manifestation. The latter were defined as: thrombocytopenia with a platelet count <30.000/mm3, hemolytic anemia with an hemoglobin <8 g/dL, neutropenia with less than 500 neutrophils/mm3, history of thrombotic microangiopathy (TMA) or macrophage activation syndrome (MAS). Treatments and long-term outcomes (relapses, mortality) were recorded.

Results

Among 300 patients with hematologic manifestations, 40 patients had severe disease. Most of them were women (75%). Mean age at SLE diagnosis was 41,1 years and mean disease duration at diagnosis of cytopenia was 3.8 years. Hematologic manifestation preceded SLE diagnosis in 13 patients (32,5%).

Autoimmune thrombocytopenia was the most common (57,5%), followed by hemolytic anemia (17.5%), TMA (12.5%) and Evans syndrome (7,5%). All patients received glucocorticoids (GC). Rituximab (15%) and cyclophosphamide (12,5%) were the most frequently used GC-sparing agents during the first episode. Nine patients (22,5%) received intravenous immunoglobulin (IVIg). Relapse occurred in 23 patients (57,5%), most of which (N=17, 73,9%) were treated with GC alone or in combination with IVIg or plasma exchange at initial presentation, without the use of GC-sparing agents. Most of the flares (60,8%) were severe. No deaths were observed.

Conclusion

Hematological disease in SLE is treatment-responsive. GC remain the mainstay of treatment, but the high relapse rates underscore the need for more efficient GC-sparing agents.

References

[1]Fayyaz A, Igoe A, Kurien BT, Danda D, James JA, Stafford HA, Scofield RH. Haematological manifestations of lupus. Lupus Sci Med. 2015 Mar 3;2(1):e000078.

[2]Hepburn AL, Narat S, Mason JC. The management of peripheral blood cytopenias in systemic lupus erythematosus. Rheumatology (Oxford). 2010 Dec;49(12):2243-54

[3]Nikolopoulos D, Kostopoulou M, Pieta A, Karageorgas T, Tseronis D, Chavatza K, Flouda S, Rapsomaniki P, Banos A, Kremasmenou E, Tzavara V, Katsimbri P, Fanouriakis A, Boumpas DT. Evolving phenotype of systemic lupus erythematosus in Caucasians: low incidence of lupus nephritis, high burden of neuropsychiatric disease and increased rates of late-onset lupus in the ‘Attikon’ cohort. Lupus. 2020 Apr;29(5):514-522.

Table 1.

Characteristics of patients with hematological manifestations

Age at diagnosis, mean (years)41,1Women N(%)30(75)Mean disease duration at cytopenia diagnosis (years)3,8Thrombocytopenia, N=23, (mean platelet count,/mm3)11682Hemolytic anemia,N=7 (mean Hb,g/dL)6,75Neutropenia N=1,(mean neutrophil count)450Evans syndrome, N=3 (mean Hb, g, mean platelet count)7 /46600TMA,N=5, (mean platelet count)8750MAS, N=1Immunosuppressive treatment at initial presentationAzathioprine (N,%) 4(10) Corticosteroids (N,%) 40 (100) Cyclophosphamide (N,%) 5(12,5) IgIV (N,%) 9 (22,5) Mycophenolate mofetil (N,%) 2(5) Rituximab (N,%) 6(15)Relapse N(%)23(57,5)Severe relapse (N,%)14(60,8)Non responder to corticosteroids/IgIV (N,%)1(2,5)

Disclosure of Interests

None declared

POS0368 EARLY (3 MONTHS) IMPROVEMENT IN PHYSICIAN GLOBAL ASSESSMENT OF DISEASE ACTIVITY PREDICTS LONG-TERM RETENTION OF BELIMUMAB TREATMENT IN SLE: A MULTICENTRE OBSERVATIONAL STUDY OF 184 PATIENTS

Background

Belimumab has been introduced in the management of SLE for more than 10 years, however long-term efficacy and safety data are still limited and mostly derive from the extended phase of randomized clinical trials.

Objectives

To evaluate the long-term survival of belimumab treatment, reasons for treatment cessation and associated predictors in routine care setting.

Methods

Multicentre observational study of adult SLE patients who were treated with belimumab according to physician discretion and in line with the EULAR recommendations. Disease activity (Physician Global Assessment [PGA]: scale 0-3; SLE disease activity index-2000 [S2K]), flares (SELENA-SLEDAI Flare Index), organ damage (SLICC damage index [SDI]), co-administered treatments and dosage, adverse events and causes of belimumab discontinuation were monitored prospectively at 3–6-month intervals. Cox-regression analysis was performed to identify factors associated with reduced drug survival.

Results

A total 184 patients treated with belimumab for at least 3 months were included (women 95.6%; mean ± SD age 48.8 ± 13.4 years; disease duration 9.2 ± 11.3 years). Baseline S2K and PGA were 7.5 ± 3.0 and 1.64 ± 0.42, respectively, both demonstrating significant improvement at 6 months (4.5 ± 3.5 and 1.02 ± 0.69, respectively; p<0.001) and 12 months (3.5 ± 3.1 and 0.68 ± 0.55, respectively; p<0.001). Of patients receiving glucocorticoids at onset, 49.0% tapered the dose and 17.6% completely withdrew them. After a median (interquartile range) follow-up of 15.1 (16.9) months, 44.0% of patients discontinued belimumab due to suboptimal efficacy as judged by the treating physician (28.3%), adverse events (including infections) (9.8%) or other causes (e.g., pregnancy, patient decision). Accordingly, efficacy-related drug survival rates at 1 and 2 years were 70% and 61%, respectively, with corresponding safety-related survival rates of 94% and 87%, respectively. Baseline factors associated with belimumab discontinuation due to suboptimal efficacy included PGA >1.50 (hazard ratio [HR] 3.66; 95% confidence interval [95% CI] 1.14–11.73; p=0.029) and severe (RA-like) arthritis (HR 2.56; 95% CI 1.16–5.68; p=0.020) but not disease duration, use of glucocorticoids, active serology or organ damage. Notably, patients with early (3 months) improvement (i.e., any decrease in PGA) showed significantly lower risk for treatment cessation (HR 0.38; 95% CI 0.22–0.67; p=0.001) (Figure 1) and this effect was independent of the initial PGA level. Baseline use of hydroxychloroquine was associated with prolonged safety-related belimumab survival (HR 0.32; 95% CI 0.12–0.88; p=0.028).

Figure 1.

Efficacy-related survival of belimumab according to improvement or not of PGA at 3 months since treatment initiation.

Conclusion

In real-life setting, about 28% of SLE patients discontinue belimumab due to suboptimal treatment response per physician judgement, especially those with moderate-to-high activity and severe arthritis. Improvement in PGA at 3 months predicts long-term drug maintenance, therefore suggesting its value for patient monitoring. Our data confirm the very good tolerability of belimumab and identify hydroxychloroquine co-administration as a predictor for prolonged safety-related drug survival.

Acknowledgements

The study was partly funded by the Greek Rheumatology Society and the Greek Association of Professional Rheumatologists (ERE-EPERE) and by Pfizer Global Medical Grants

Disclosure of Interests

Myrto Nikoloudaki: None declared, Dionysis Nikolopoulos: None declared, SOFIA KOUTSOVITI: None declared, Irini Flouri: None declared, Noemin Kapsala: None declared, ARGYRO REPA: None declared, PELAGIA KATSIMPRI: None declared, EVANGELOS THEOTIKOS: None declared, Sofia Pitsigavdaki: None declared, Katerina Pateromichelaki: None declared, Anastasios Eskitzis: None declared, ANTONIA ELEZOGLOU: None declared, Prodromos Sidiropoulos: None declared, Antonis Fanouriakis: None declared, Dimitrios Boumpas: None declared, George Bertsias Speakers bureau: GSK, AstraZeneca, Pfizer, SOBI, UCB, Novartis, AENORASIS, Abbvie, Grant/research support from: GSK, Pfizer

Molecular Taxonomy of Systemic Lupus Erythematosus Through Data-Driven Patient Stratification: Molecular Endotypes and Cluster-Tailored Drugs

Objectives

Treatment of Systemic Lupus Erythematosus (SLE) is characterized by a largely empirical approach and relative paucity of novel compound development. We sought to stratify SLE patients based on their molecular phenotype and identify putative therapeutic compounds for each molecular fingerprint.

Methods

By the use of whole blood RNA-seq data from 120 SLE patients, and in a data-driven, clinically unbiased manner, we established modules of commonly regulated genes (molecular endotypes) and re-stratified patients through hierarchical clustering. Disease activity and severity were assessed using SLEDAI-2K and Lupus Severity Index, respectively. Through an in silico drug prediction pipeline, we investigated drugs currently in use, tested in lupus clinical trials, and listed in the iLINCS prediction databases, for their ability to reverse the gene expression signatures in each molecular endotype. Drug repurposing analysis was also performed to identify perturbagens that counteract group-specific SLE signatures.

Results

Molecular taxonomy identified five lupus endotypes, each characterized by a unique gene module enrichment pattern. Neutrophilic signature group consisted primarily of patients with active lupus nephritis, while the B-cell expression group included patients with constitutional features. Patients with moderate severity and serologic activity exhibited a signature enriched for metabolic processes. Mild disease was distributed in two groups, exhibiting enhanced basic cellular functions, myelopoiesis, and autophagy. Bortezomib was predicted to reverse disturbances in the "neutrophilic" cluster, azathioprine and ixazomib in the "B-cell" cluster, and fostamatinib in the "metabolic" patient subgroup.

Conclusion

The clinical spectrum of SLE encompasses distinct molecular endotypes, each defined by unique pathophysiologic aberrancies potentially reversible by distinct compounds.

Demyelinating Syndromes in Systemic Lupus Erythematosus: Data From the "Attikon" Lupus Cohort

Background

The demyelinating syndromes of the central nervous system (CNS) that occur in the context of systemic lupus erythematosus (SLE) may represent a manifestation of neuropsychiatric lupus (NPSLE) or an overlap of SLE and multiple sclerosis (MS). The differential diagnosis between the two entities has important clinical implications because the therapeutic management differs.

Objectives

To characterize CNS demyelinating syndromes in a large SLE cohort as neuropsychiatric SLE (NPSLE) or SLE-MS overlap using a multidisciplinary approach and existing diagnostic (for MS) and classification criteria (for SLE).

Methods

Patients from the "Attikon" lupus cohort (n = 707) were evaluated for demyelinating syndromes. Clinical, laboratory, and neuroimaging data were recorded for each patient. Following multidisciplinary evaluation and application of criteria, the demyelinating syndrome was attributed to either SLE or MS. Patients with transverse myelitis were not included in this study.

Results

We identified 26 patients with demyelinating syndromes (3.7%). Of them, 12 were diagnosed as primary SLE-demyelination (46.2%) and 14 as overlap SLE-MS (53.8%). The two groups did not differ with respect to rheumatologic and neurologic manifestations or autoantibodies. SLE patients with demyelination manifested mild extra-CNS disease mainly involving joints and skin, while severe non-CNS manifestations were rare. However, these patients were less likely to have elevated IgG index (OR 0.055 95% CI: 0.008-0.40) and positive oligoclonal bands (OR 0.09 95% CI: 0.014-0.56), as well as brain lesions in the spinal cord, infratentorial, periventricular, and juxtacortical regions. A single brain region was affected in 9 patients with SLE-demyelination (75%), while all patients with MS-SLE had multiple affected brain regions. MS-SLE overlap was associated with an increased likelihood of neurologic relapses (OR 18.2, 95% CI: 1.76-188), while SLE-demyelination patients were less likely to exhibit neurological deficits (EDSS >0) at the last follow-up visit (50 vs. 78.6% in SLE-MS, respectively).

Conclusions

Demyelination in the context of SLE follows a more benign course compared to a frank SLE-MS overlap. Extension of follow-up will ascertain whether patients with SLE-demyelination evolve to MS, or this is a bona fide NPSLE syndrome.

Tailored treatment strategies and future directions in systemic lupus erythematosus

Systemic lupus erythematosus (SLE) represents a diagnostic and therapeutic challenge for physicians due to its protean manifestations and unpredictable course. The disease may manifest as multisystemic or organ-dominant and severity at presentation may vary according to age at onset (childhood-, adult- or late-onset SLE). Different manifestations may respond variably to different immunosuppressive medications and, even within the same organ-system, the severity of inflammation may vary from mild to organ-threatening. Current "state-of-the-art" in SLE treatment aims at remission or low disease activity in all organ systems. Apart from hydroxychloroquine and glucocorticoids (which should be used with caution), the choice of the appropriate immunosuppressive agent should be individualized and depend on the prevailing manifestation, severity stratification and patient childbearing potential. In this review, we provide an overview of therapeutic options for the various organ manifestations and severity patterns of the disease, different phenotypes (such as multisystem versus organ-dominant disease), as well as specific considerations, including lupus with antiphospholipid antibodies, childhood and late-onset disease, as well as treatment options during pregnancy and lactation.

First Diagnosis of Systemic Lupus Erythematosus in Hospitalized Patients: Clinical Phenotypes and Pitfalls for the Non-Specialist

BACKGROUND

Prompt recognition of systemic lupus erythematosus (SLE) in hospitalized patients presenting with severe disease is essential to initiate treatment. We sought to characterize the phenotype of hospitalized patients with new-onset SLE and estimate potential diagnostic delays.

METHODS

An observational study of 855 patients ("Attikon" SLE cohort). Clinical phenotype was categorized according to the leading manifestation that led to hospitalization. Disease features, time to diagnosis, classification criteria, and the SLE Risk Probability Index (SLERPI) were recorded for each patient.

RESULTS

There were 191 patients (22.3% of the total cohort) hospitalized due to manifestations eventually attributed to SLE. Main causes of admission were neuropsychiatric syndromes (21.4%), cytopenias (17.8%), nephritis (17.2%), and thrombotic events (16.2%). Although 79.5% of patients were diagnosed within 3 months from hospitalization, in 39 patients diagnosis was delayed, particularly in those with hematological manifestations. At hospitalization, a SLERPI >7 (indicating high probability for SLE) was found in 87.4% of patients. Patients missed by the SLERPI had fever, thrombotic or neuropsychiatric manifestations not included in the algorithm. Lowering the SLERPI threshold to 5 in patients with fever or thrombotic events increased the diagnostic rate from 88.8% to 97.9% in this subgroup, while inclusion of all neuropsychiatric events yielded no additional diagnostic value.

CONCLUSION

One in five patients with new-onset SLE manifest disease presentations required hospitalization. Although early diagnosis was achieved in the majority of cases, in approximately 20%, diagnosis was delayed. A lower SLERPI cut-off (≥5) in patients with fever or thrombosis could enhance early diagnosis.

Performance of the systemic lupus erythematosus risk probability index in a cohort of undifferentiated connective tissue disease

OBJECTIVES

We sought to evaluate the performance of the systemic lupus erythematosus (SLE) Risk Probability Index (SLERPI) for identification of SLE in a large cohort of patients with undifferentiated connective tissue disease (UCTD).

METHODS

The SLERPI was applied in a cohort of patients who met classification criteria for UCTD and did not fulfill any classification criteria for other defined CTD including SLE. Patients with a SLERPI score of > 7 were "diagnosed" as SLE. Patients diagnosed with SLE and those not, were compared in terms of disease characteristics and index parameters.

RESULTS

A total of 422 patients with UCTD were included in the study. Median (IQR) SLERPI was 4.25 (2.5) points, while 39 (9.2%) patients had a SLERPI score >7 and were diagnosed as SLE. Patients with younger age (p = 0.026) and presence of malar rash (p < 0.0001), mucosal ulcer (p < 0.0001), alopecia (p < 0.0001), ANA positivity (p < 0.0001), low C3 and C4 (p = 0.002), proteinuria>500 mg/24 hours (p = 0.001), thrombocytopenia (p = 0.009) or autoimmune haemolytic anaemia (p < 0.0001) were more likely to fulfill criteria for SLE by the SLERPI.

CONCLUSION

SLERPI enabled a significant proportion of patients to be identified as SLE in our UCTD cohort. This new probability index may be useful for early identification of SLE among patients with signs of CTD without fulfilling any definite criteria set.

Screening for cognitive impairment in systemic lupus erythematosus: Application of the Montreal Cognitive Assessment (MoCA) in a Greek patient sample

BACKGROUND

Cognitive impairment (CI) is one of the most frequent neuropsychiatric manifestations of systemic lupus erythematosus (SLE). Given that extensive neuropsychological testing is not always feasible in routine clinical practice, brief cognitive screening tools are desirable. The aim of this study was to evaluate the Montreal Cognitive Assessment (MoCA) as a screening tool for CI in SLE.

METHODS

Consecutive SLE patients followed at a single centre were evaluated using MoCA and an extensive neuropsychological test battery (NPT), including the Digits Forward and Digits Backwards, Rey Auditory Verbal Learning Memory Test, Trail Making Test, Stroop Colour-Word Test, Semantic and Phonetic Verbal Fluency tests and a 25-problem version of the General Adult Mental Ability test. The criterion validity of MoCA was assessed through receiver operating characteristic (ROC) analyses using three different case definitions: i) against normative population data, ii) and iii) against average performance of a comparison group of rheumatoid arthritis (RA) patients, to adjust for possible confounding effects of chronic illness and inflammatory processes on cognitive performance. The effect of patient-related (age, years of education, anxiety, depression, fatigue and pain) and disease-related (activity, damage, age at diagnosis, disease duration, use of glucocorticoid, psychotropic and pain medication) parameters on the MoCA was examined.

RESULTS

A total of 71 SLE patients were evaluated. MoCA significantly correlated with all NPT scores and was affected by education level (p < 0.001), but not by other demographic or clinical variables. The optimal cutoff for detecting CI, as defined on the basis of normative population data, was 23/30 points, demonstrating 73% sensitivity and 75% specificity. A cutoff of 22/30 points, using neuropsychological profiles of the RA group as inflammatory disease controls, exhibited higher sensitivity (100%, based on both definitions) and specificity (87% and 90%, depending on the definition). The standard cutoff of 26/30 points displayed excellent sensitivity (91-100%) with significant expenses in specificity (43-45%).

CONCLUSION

The MoCA is an easily applied tool, which appears to be reliable for identifying CI in SLE patients. The standard cutoff score (26/30) ensures excellent sensitivity while lower cutoff scores (22-23/30) may, also, provide higher specificity.

Demyelination with autoimmune features: a distinct clinical entity? Results from a longitudinal cohort

OBJECTIVE

CNS demyelinating syndromes occurring in the context of SLE may represent a manifestation of neuropsychiatric lupus, or an overlap of SLE and multiple sclerosis (MS). We evaluated prospectively patients presenting with demyelinating syndrome for clinical and serological evidence of SLE and characterized the evolution of their clinical syndrome to a defined disease.

METHODS

Patients with CNS demyelinating syndromes not fulfilling the criteria for MS were evaluated in a rheumatology unit for features of SLE and followed longitudinally (enrolment period 2016-20). Clinical, laboratory and neuroimaging data were recorded at every visit, following multidisciplinary evaluation. At end of follow-up, patients were assessed for their final neurological and rheumatological diagnosis, and classified accordingly.

RESULTS

A total of 79 patients were included in the study [91.1% female, mean (s.d.) age at first demyelinating episode 38.4 (10.3) years, median (interquartile range) observation period 39 (57) months]. At last follow-up, 38 patients (48.1%) had evolved into MS. Of the remaining patients, 7 (17.1%) had SLE, while 34 (82.9%) had features of systemic autoimmunity without fulfilling classification criteria for SLE. The most common rheumatological features of these patients were inflammatory arthritis (73.5%), acute cutaneous lupus (47.1%) and positive ANA (72.1%). Importantly, these patients were less likely to have elevated IgG index (odds ratio 0.11, 95% CI 0.04, 0.32) and positive oligoclonal bands (odds ratio 0.21, 95% CI 0.08, 0.55).

CONCLUSION

A significant number of patients with demyelination do not fulfill criteria for either MS or SLE at follow-up. These patients exhibit lupus-like autoimmune features and may represent a distinct entity, 'demyelination with autoimmune features'.

Quality indicators for systemic lupus erythematosus based on the 2019 EULAR recommendations: development and initial validation in a cohort of 220 patients

BACKGROUND

Quality of care is receiving increased attention in systemic lupus erythematosus (SLE). We developed quality indicators (QIs) for SLE based on the 2019 update of European League Against Rheumatism recommendations.

METHODS

A total of 44 candidate QIs corresponding to diagnosis, monitoring and treatment, were independently rated for validity and feasibility by 12 experts and analysed by a modified Research and Development Corporation/University of California Los Angeles model. Adherence to the final set of QIs and correlation with disease outcomes (flares, hospitalisations and organ damage) was tested in a cohort of 220 SLE patients with a median monitoring of 2 years (IQR 2-4).

RESULTS

The panel selected a total of 18 QIs as valid and feasible. On average, SLE patients received 54% (95% CI 52.3% to 56.2%) of recommended care, with adherence ranging from 44.7% (95% CI 40.8% to 48.6%) for diagnosis-related QIs to 84.3% (95% CI 80.6% to 87.5%) for treatment-related QIs. Sustained remission or low disease activity were achieved in 26.8% (95% CI 21.1% to 33.2%). Tapering of prednisone dose to less than 7.5 mg/day was achieved in 93.6% (95% CI 88.2% to 97.0%) while 73.5% (95% CI 66.6% to 79.6%) received the recommended hydroxychloroquine dose. Higher adherence to monitoring-related QIs was associated with reduced risk for a composite adverse outcome (flare, hospitalisation or damage accrual) during the last year of observation (OR 0.97 per 1% adherence rate, 95% CI 0.96 to 0.99).

CONCLUSION

We developed QIs for assessing and improving the care of SLE patients. Initial real-life data suggest face validity, but a variable degree of adherence and a need for further improvement.

Management of lupus nephritis: a systematic literature review informing the 2019 update of the joint EULAR and European Renal Association-European Dialysis and Transplant Association (EULAR/ERA-EDTA) recommendations

Objectives

To analyse the current evidence for the management of lupus nephritis (LN) informing the 2019 update of the EULAR/European Renal Association-European Dialysis and Transplant Association recommendations.

Methods

According to the EULAR standardised operating procedures, a PubMed systematic literature review was performed, from January 1, 2012 to December 31, 2018. Since this was an update of the 2012 recommendations, the final level of evidence (LoE) and grading of recommendations considered the total body of evidence, including literature prior to 2012.

Results

We identified 387 relevant articles. High-quality randomised evidence supports the use of immunosuppressive treatment for class III and class IV LN (LoE 1a), and moderate-level evidence supports the use of immunosuppressive treatment for pure class V LN with nephrotic-range proteinuria (LoE 2b). Treatment should aim for at least 25% reduction in proteinuria at 3 months, 50% at 6 months and complete renal response (<500–700 mg/day) at 12 months (LoE 2a-2b). High-quality evidence supports the use of mycophenolate mofetil/mycophenolic acid (MMF/MPA) or low-dose intravenous cyclophosphamide (CY) as initial treatment of active class III/IV LN (LoE 1a). Combination of tacrolimus with MMF/MPA and high-dose CY are alternatives in specific circumstances (LoE 1a). There is low-quality level evidence to guide optimal duration of immunosuppression in LN (LoE 3). In end-stage kidney disease, all methods of kidney replacement treatment can be used, with transplantation having the most favourable outcomes (LoE 2b).

Conclusions

There is high-quality evidence to guide the initial and subsequent phases of class III/IV LN treatment, but low-to-moderate quality evidence to guide treatment of class V LN, monitoring and optimal duration of immunosuppression.

POS0764 EULAR RECOMMENDATION-BASED QUALITY INDICATORS (QIS) FOR SYSTEMIC LUPUS ERYTHEMATOSUS (SLE): ELABORATION, FINAL SET, PERFORMANCE AND INITIAL VALIDATION

Background:

Targets of therapy and quality of care are receiving increased attention in systemic lupus erythematosus (SLE).

Objectives:

To develop Quality Indicators (QIs) for the care of SLE patients based on the EULAR recommendations, and assess their performance.

Methods:

Using the published EULAR recommendations for SLE, we developed 44 candidate QIs. These were independently rated for validity and feasibility by 12 experts, analysed by a modified RAND/UCLA model and further scrutinized based on the scorings and expert opinion. (Fig.1) Adherence to the final set of QIs was tested in a cohort of 220 SLE patients combined with an assessment on its impact on disease outcomes such as flares, hospitalizations and organ damage.

Results:

The panel rated 18 QIs as valid and feasible. These involve diagnosis; disease and damage assessment; monitoring for lupus nephritis and drug toxicity; therapy and targets of therapy; fertility and pregnancy; and adjunct therapy (preventive measures for osteoporosis, vaccination, cardiovascular disease). On average, SLE patients received 54% (95%CI 52–56%) of the indicated care with adherence ranging from 41% for QIs related to monitoring to 88% for treatment-related QIs. Regarding targets of therapy, sustained remission or low disease activity were achieved in 27%, while 94% of patients received low-dose glucocorticoids, and 92% the recommended hydroxychloroquine dose. Dependent upon individual QI tested, adherence for lupus nephritis-related QIs was 88% for receiving appropriate adjunct therapy (ACE inhibitors) to 100% for being treated with the indicated immunosuppressive treatment. In contrast, adherence to QIs related to preventive measures and other adjunct therapies was moderate to low. Notably, patients who were eligible for cardiovascular risk modification, vaccination, and osteoporosis management received lower quality of care (40.5%, 47.7% and 45.5% respectively) while 91.4% had sunscreen protection. In reference to laboratory work-up and monitoring, complete laboratory work-up at diagnosis was performed in 48%, while disease activity and damage, were fully assessed only in 14.1% (in three consecutive visits) and 28.6% (annually) respectively, Similarly, reproductive health and pregnancy counselling adherence rates were modest estimated at 50% and 62% respectively. Higher adherence to the indicated care during follow-up (monitoring QIs) was associated with reduced risk for adverse outcomes during the last year of observation (OR 0.97, 95%CI 0.96-0.99). Patients who achieved sustained remission or LLDAS, exhibited fewer flares (OR=0.15, p-value<0.001) and damage accrual (OR=0.35, p-value<0.001). Of interest, patients who received low-dose of GCs or were appropriately vaccinated, had a lower risk of experiencing a flare (OR=0.23 and 0.46 respectively).

Conclusion:

A set of 18 QIs based on the EULAR recommendations for SLE was developed to be used towards improving care in SLE. Initial real-life data suggest variable degree of adherence with higher adherence resulting in reduced adverse outcomes.

References:

[1]Fanouriakis, et al., 2019 Update of the EULAR recommendations for the management of systemic lupus erythematosus. In Annals of the Rheumatic Diseases (Vol. 78, Issue 6, pp. 736–745). BMJ Publishing Group. https://doi.org/10.1136/annrheumdis-2019-215089.

[2]Nikolopoulos, D., et al., Evolving phenotype of systemic lupus erythematosus in Caucasians: low incidence of lupus nephritis, high burden of neuropsychiatric disease and increased rates of late-onset lupus in the ‘Attikon’ cohort. Lupus, 29(5), 514–522. https://doi.org/10.1177/0961203320908932.

Acknowledgements:

This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 742390)

Disclosure of Interests:

None declared

OP0019 DEFINING SYSTEMIC LUPUS ERYTHEMATOSUS MOLECULAR TAXONOMY THROUGH DATA-DRIVEN RESTRATIFICATION AND IDENTIFICATION OF CLUSTER-TAILORED DRUGS FOR A PERSONALIZED MEDICINE APPROACH

Background:

Systemic Lupus Erythematosus (SLE) is characterized by lack of treatment diversity, largely empirical treatment decisions, and paucity of novel compound development.

Objectives:

We sought to stratify SLE patients based on their molecular phenotype and predict personalized therapeutic compounds, tailored to the molecular fingerprint of each subgroup.

Methods:

We performed a co-expression analysis using our publicly available whole blood RNA-seq data of 120 SLE patients. Modules of commonly regulated genes were established and used to re-stratify patients through hierarchical clustering, in a data-driven, clinically independent, manner. Next, we established an in silico, subgroup signature-based, drug prediction pipeline. Investigated drugs included both those currently in practice and those who have been tested in SLE clinical trials and are listed in the iLINCS prediction databases. Finally, drug repurposing analysis was performed, to identify novel perturbagens that counteract group-specific SLE signatures.

Results:

Molecular taxonomy identified five distinct lupus molecular endotypes, each characterized by a unique gene module enrichment pattern. A group defined by strong neutrophilic signature encompassed almost exclusively patients with active nephritis, while a B-cell expression group included patients with severe lupus phenotype. Metabolic processes enrichment defined a group of patients with disease of moderate severity and serologic activity. Finally, patients with mild lupus features were distributed in two groups, which demonstrated enhanced basic cellular functions, myelopoiesis, and autophagy. The ability of different compounds to reverse the transcriptomic aberrancies observed in each patient group was examined. Bortezomib efficiently reversed disturbances in the “neutrophilic” cluster. Azathioprine and ixazomib might be a reasonable option for patients of the “B-cell” cluster, whereas fostamatinib appeared efficacious for the “Metabolism” patient subgroup.

Conclusion:

The clinical spectrum of SLE encompasses distinct molecular endotypes, each defined by unique pathophysiologic aberrancies, which can be utilized to guide personalized care and direct novel compound development.

Acknowledgements:

This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 742390).

Disclosure of Interests:

None declared

POS0786 UNMET TREATMENT NEEDS IN SYSTEMIC LUPUS ERYTHEMATOSUS (SLE): A CROSS-SECTIONAL ASSESSMENT OF DISEASE ACTIVITY IN SLE PATIENTS DURING THEIR LAST VISIT

Background:

The current goal of treatment in SLE is remission or low disease activity (LDA) and prevention of flares, achieved with the lowest possible dose of glucocorticoids. Nevertheless, in current clinical practice a significant number of patients still has active disease.1,2

Objectives:

To assess the current disease activity state of SLE patients during their most recent visit in two centers (Department of Rheumatology in “Asklepieio” Hospital and Rheumatology Unit in “Attikon” Hospital, both in Athens, Greece).

Methods:

Cross-sectional study of patients with a diagnosis of SLE for at least one year. Patients were divided into four groups: 1) Remission off-therapy: SLE Disease Activity Index (SLEDAI)=0 without prednisone or immunosuppressive drugs (IS), 2) Remission on-therapy: SLEDAI=0, prednisone dose ≤5mg/day and/or IS (conventional and biologic, maintenance phase), 3) LDA: SLEDAI ≤4, prednisone dose ≤7.5mg/day and/or IS (maintenance phase), 4) Active disease: SLEDAI >4 and/or prednisone dose >7.5mg/day and/or IS (induction phase).2 Hydroxychloroquine was allowed in all groups.

Results:

205 patients were included [95.1% female, mean (SD) age 48.4 (14.9) years and median disease duration (IQR) 6.2 (12.6) years]. A history of lupus nephritis and neuropsychiatric SLE was present in 16.6% and 17.1% of our patients, respectively, and 39% of patients had SLICC/ACR damage index (SDI) > 0. At last visit, remission off-therapy and remission on-therapy was present in 8.3% (n=17) and 15.1% (n=31) of our patients, respectively. Seventy-five patients (36.6%) had LDA, whereas 82 patients (40%) had active disease. More than 85% (86.3%) of patients were in treatment with hydroxychloroquine and 64.4% were receiving immunosuppressive drugs. Regarding glucocorticoids, 50.2% (n=103) were treated with prednisone dose ≤7.5mg/day and over 40% (42.4%, n=87) did not receive prednisone at all. A SLEDAI score 0 and 1-4 was achieved in 24.4% and 42.9% of patients, respectively, but only 3.9% had a SLEDAI > 8, indicative of high disease activity.

Conclusion:

Although the majority of our patients were treated with hydroxychloroquine and glucocorticoids in acceptable levels of daily dose, four out of ten patients in our practice have active disease during their last visit. Achieving treatment goals in SLE patients remains a challenge for future novel therapies.

References:

[1]Fanouriakis A, Kostopoulou M, Alunno A, et al. 2019 update of the EULAR recommendations for the management of systemic lupus erythematosus. Ann Rheum Dis 2019; 78: 736–745.

[2]Ugarte-Gil MF, Wojdyla D, Pons-Estel GJ, et al. Remission and Low Disease Activity Status (LDAS) protect lupus patients from damage occurrence: data from a multiethnic, multinational Latin American Lupus Cohort (GLADEL). Ann Rheum Dis 2017; 76: 2071–2074.

Disclosure of Interests:

None declared

POS0759 THE JOURNEY OF PATIENTS FROM FIRST SYMPTOMS TO DIAGNOSIS OF SYSTEMIC LUPUS ERYTHEMATOSUS (SLE): AN OBSERVATIONAL STUDY

Background:

The lack of pathognomonic features poses a considerable challenge in SLE diagnosis. The time from symptom onset to diagnosis has been reported to range from two to six years1.

Objectives:

To document the initial symptoms of the disease and the time lapse until its diagnosis.

Methods:

We examined 438 patients from the “Attikon” SLE cohort2. For diagnosis, we used the classification criteria (ACR, SLICC, EULAR-ACR) or in few cases clinical diagnosis (n=32, 7.3%). Data were collected using patient interviews, in-person clinical visits and medical charts review. Initial symptoms were recorded and determined chronologically using prespecified forms with a list of typical manifestations (skin, joints, renal, nervous system, pleuropulmonary, cardiovascular, anti-phospholipid syndrome) as well as characteristic disease features (Raynaud’s phenomenon, fatigue, fever, sicca symptoms). Questions also included the time between symptom onset and initial physician visit, the time from first medical consultation until first rheumatologist assessment, the time from rheumatologist assessment to SLE definite diagnosis, the number of physicians seen before SLE diagnosis, the specialty of first physician and of diagnosing physician. Information on demographic and clinical characteristics, disease activity and disease damage, was collected both at enrolment and at last follow-up visit.

Results:

88.5% of patients were females, mean (±SD) age at diagnosis was 41.9 years ± 15.4 and disease duration was 6.7 ± 7 years. Most common systems involved were joints (94.5%), skin (73.7%), blood (39.2%) and renal (17.5%). At diagnosis, 9.8% of patients were ANA negative. The most common initial symptoms at disease onset were arthritis/arthralgia (74.4%), followed by fatigue (53.1%) and photosensitive rash (50.9%) (Table 1). Among non-criteria features, Raynaud’s phenomenon was reported by 146 patients (33.3%) prior the diagnosis. The median interval between symptoms onset and the SLE diagnosis was 16 months (IQR 5-60). SLE was diagnosed earlier in ANA-positive than -negative patients [median time 14 months (IQR 5-60) vs 36 months (IQR 10.5-84); P=0.1, t-test]. Approximately half of the patients (52.5%) were diagnosed after 12 months from disease onset with only 15.9% diagnosed within 3 months of symptoms presentation. The median lag time between onset of symptoms and the first medical consultation was 2 months (IQR 1-12). Internists were the most common first consultants (27.8%) followed by orthopedists (15.9%), dermatologists (13.6%) and rheumatologists (13.4%). The median interval between the first medical assessment and first rheumatologist evaluation was 3 months (IQR 0-11.5) while the median time from rheumatologist assessment to definite diagnosis was 0 months (IQR 0-4). SLE patients consulted an average of 3 different physicians before the definite diagnosis, which in 95.8% was established by rheumatologists.

Conclusion:

Approximately 50% of patients were diagnosed with SLE after 12 months from symptom onset with a mean time from symptoms to definite diagnosis almost 4 years. Increasing awareness of internists to SLE and avoidance of strict adherence to ANA as a requirement for diagnosis may improve early diagnosis.

Table 1.

Initial symptoms prior to diagnosis

SymptomsN=438 (%)Duration*(mean months ±SD)Arthralgias326 (74.4)37.5 ±69.4Photosensitive rash223 (50.9)30.6 ±70.2Malar rash168 (38.3)22.6 ±62Alopecia167 (38.1)19.6 ±54.6Ulcers106 (24.2)16.8 ±54.4Fever103 (23.5)9.3 ±43.8Raynaud’s phenomenon146 (33.3)22.3 ±68.5Fatigue233 (53.1)19.7 ±45.7

*Mean time from symptom onset to established diagnosis

References:

[1]Nightingale AL, Davidson JE, Molta CT et al. Lupus Science & Medicine 2017; doi:10.1136/lupus-2016-000172.

[2]D Nikolopoulos et al. Lupus 2020; doi: 10.1177/0961203320908932.

Acknowledgements:

This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 742390)

Disclosure of Interests:

None declared