Cutaneous lupus erythematosus and cardiovascular disease: current knowledge and insights into pathogenesis

Association between systemic lupus erythematosus and cardiovascular health based on genetic data

OBJECTIVE

To investigate the genetic causal relationship between systemic lupus erythematosus (SLE) and cardiovascular diseases through Mendelian randomization (MR) analysis.

METHODS

This study employed a two-sample bidirectional MR design. Data were sourced from publicly available genome-wide association study (GWAS) databases. A total of 482,911 European individuals diagnosed with SLE were selected, covering 24,198,877 single-nucleotide polymorphisms (SNPs), along with relevant GWAS summary data for cardiovascular diseases. Genetic variants were used as instrumental variables. The MR analysis was conducted using the TwoSampleMR R package, employing methods including inverse-variance weighting (IVW), weighted median, and MR-Egger to assess the causal relationships. Sensitivity analyses were also performed to verify result robustness.

RESULTS

MR analysis indicated potential causal risk relationships between genetic predisposition to SLE and increased risk of pericarditis and peripheral artery disease (PAD). Conversely, reverse MR analyses did not demonstrate significant causal associations, with IVW estimates indicating no causal relationships between coronary artery disease (OR = 1.038, 95%CI 0.829-1.3, P = 0.745), dilated cardiomyopathy (OR = 1.044, 95%CI 0.907-1.203, P = 0.548), heart failure (OR = 0.991, 95%CI 0.729-1.348, P = 0.956), hypertrophic cardiomyopathy (OR = 0.958, 95%CI 0.896-1.024, P = 0.207), pericarditis (OR = 0.958, 95%CI 0.821-1.118, P = 0.589), or PAD (OR = 1.157, 95%CI 0.625-2.143, P = 0.642) and the risk of SLE.

CONCLUSIONS

This study utilizes MR analysis to reveal genetic causal relationships between SLE and cardiovascular complications, specifically pericarditis and PAD. These findings suggest that inflammation control in SLE patients may help prevent pericarditis while managing dyslipidemia could mitigate PAD risk. Key Points • This study utilizes MR analysis to reveal the causal relationships between SLE and conditions such as pericarditis and PAD from a genetic perspective. • It suggests that controlling inflammation in the treatment of SLE can prevent pericarditis, and managing abnormal lipid levels can reduce the risk of PAD.

Modern therapy of patients with lupus erythematosus must include appropriate management of their heightened rates of atherosclerotic cardiovascular events: a literature update

Atherosclerotic cardiovascular disease (ASCVD) remains the biggest killer of patients with lupus erythematosus (LE) and the general non-autoimmune population. In this literature update on LE and ASCVD, we focused on published work since our earlier review article, meaning from 2021 to the present, with an emphasis on cutaneous LE. Several themes emerged. First, new work shows that patients with lupus still exhibit a high burden of conventional risk factors for ASCVD events. Second, recent studies continue to implicate possible effects of lupus disease activity to worsen rates of ASCVD events beyond predictions from conventional risk factors. Third, new work on estimating the risk of future ASCVD events in patients with lupus supports arterial-wall imaging, inclusion of lupus-specific factors, estimators of ASCVD event risk that take lupus status into account and considering lupus as a diabetes equivalent or even as a diabetes-plus-smoking equivalent in this context. Technologies for arterial-wall imaging continue to improve and will likely play an increasing role in ASCVD assessment and management. Fourth, purported cardiovascular benefits from certain disease-modifying antirheumatic drugs such as antimalarials have become less clear. Fifth, earlier treatment of atherosclerosis, which is a lifelong disease, can be accomplished with diet, exercise, smoking cessation and new classes of safe and effective medications for lipid-lowering and blood pressure control. Benefits on subclinical arterial disease by imaging and on ASCVD events have been reported, supporting the concept that ASCVD is eminently manageable in this autoimmune condition. Sixth, despite the heightened risk for ASCVD events in patients with lupus, available therapeutic approaches remain unused or underused and, accordingly, event rates remain high.Raising awareness among patients and healthcare providers about ASCVD assessment and management in patients with LE is essential. Greater vigilance is needed to prevent ASCVD events in patients with lupus by addressing dyslipidaemias, hypertension, smoking, obesity and physical inactivity.

Incidence and Prevalence of Atherosclerotic Cardiovascular Disease in Cutaneous Lupus Erythematosus

Importance

Autoimmune diseases such as systemic lupus erythematosus (SLE) and psoriasis have been previously associated with an increased risk of atherosclerotic cardiovascular disease (ASCVD). Whether similar increased ASCVD risk is seen with cutaneous lupus erythematosus (CLE) remains unclear.

Objective

To evaluate the incidence and prevalence of ASCVD among those with CLE, SLE, and psoriasis compared with a disease-free control group.

Design, Setting, and Participants

This retrospective, matched longitudinal cohort study used data from January 2018 to December 2020 in the IBM MarketScan Commercial Claims and Encounters Database. The control population included individuals free of CLE, SLE, and psoriasis, matched 10:1 with the CLE population on age, sex, insurance type, and enrollment duration. Data were analyzed from September 2022 to April 2024.

Main Outcomes and Measures

Prevalent ASCVD was defined as coronary artery disease, prior myocardial infarction, or cerebrovascular accident. Incident ASCVD was assessed through the number of hospitalization events through the end of follow-up (up to 3 years) in each group. Multivariable logistic regression and Cox proportional hazards models were performed to compare the prevalence and incidence of ASCVD between exposure groups, adjusting for age, sex, and cardiovascular risk factors.

Results

A total of 8138 persons with CLE (median [IQR] age, 49 [40-47] years; 6618 [81%] female), 24 675 with SLE (median [IQR] age, 46 [36-54] years; 22 432 [91%] female), 192 577 persons with psoriasis (median [IQR] age, 48 [36-56] years; 106 631 [55%] female), and 81 380 control individuals (49 [40-57] years; 66 180 [81%] female) were identified. In multivariable analysis, the odds of ASCVD were higher than control for CLE (odds ratio [OR], 1.72 [95% CI, 1.45-2.02]; P < .001) and SLE (OR, 2.41 [95% CI, 2.14-2.70]; P < .001), but not psoriasis (OR, 1.03 [95% CI, 0.95-1.11]; P = .48). At median 3 years follow-up, incidence rates of ASCVD were highest for SLE (24.8 [95% CI, 23.3-26.4] per 1000 person-years), followed by CLE (15.2 [95% CI, 13.1-17.7] per 1000 person-years), psoriasis (14.0 [95% CI, 13.5-14.4] per 1000 person-years), and then controls (10.3 [95% CI, 9.77-10.94] per 1000 person-years). In multivariable Cox proportional regression modeling with the control group as a reference group, the highest risk of incident ASCVD was in those with SLE (hazard ratio [HR], 2.23 [95% CI, 2.05-2.43]; P < .001), followed by CLE (HR, 1.32 [95% CI, 1.13-1.55]; P < .001), and psoriasis (HR, 1.06 [95% CI, 0.99-1.13]; P = .09).

Conclusions and Relevance

In this retrospective matched longitudinal cohort study, CLE was associated with an increased risk for ASCVD, similar to the risk in SLE but higher than the risk in psoriasis. The role of comorbidities that augment ASCVD risk like smoking status should be further investigated. Clinicians treating patients with CLE can consider them at increased ASCVD risk and institute appropriate screening tests.

Systemic lupus erythematosus is associated with an increased risk of cervical artery dissection

Limited evidence suggests that autoimmune diseases are associated with an increased risk of cervical artery dissection (CeAD). We hypothesized individuals with systemic lupus erythematosus (SLE) would have an increased risk of CeAD following SLE diagnosis compared to matched non-lupus controls. We queried a de-identified United States electronic medical records network (TriNetX, Inc.) for individuals aged 10 and older from 2012 to 2020, for two cohorts: (1) SLE and (2) non-lupus controls, excluding those with prior CeAD. We used propensity matching to control for confounding variables and calculated the risk ratio (RR) for CeAD occurring over four years' follow-up, secondarily exploring cumulative incidence. After matching, both cohorts contained 77,008 patients, who were mostly female (89%). The incidence and risk of CeAD was significantly greater among those with SLE compared to matched non-lupus controls [95% CI] (0.08% vs. 0.04%; RR = 2.33 [1.49;3.66]; P < 0.0001). These findings support the hypothesis that SLE is a risk factor for CeAD. Additional research is needed to identify the mechanisms that may underly the SLE-CeAD association and examine the potential association between other autoimmune diseases and CeAD.

State of current management of the heightened risk for atherosclerotic cardiovascular events in an established cohort of patients with lupus erythematosus

OBJECTIVE

Patients with lupus erythematosus (LE) are at heightened risk for clinical events, chiefly heart attacks and strokes, from atherosclerotic cardiovascular disease (ASCVD). We recently proposed new guidelines to assess and manage ASCVD event risk specifically in LE. Here, we examined current cardiovascular management in light of these new recommendations.

METHODS

We studied our entire UPenn Longitudinal Lupus Cohort of patients with cutaneous LE, without (CLE-only) or with (CLE+SLE) concurrent systemic LE, for whom we had full access to medical records (n=370, LE-ASCVD Study Cohort).

RESULTS

Of our LE-ASCVD Study Cohort, 336 out of 370 (90.8%) had a designated primary-care physician. By the new guidelines, the most recent low-density lipoprotein (LDL) levels were above-goal for 249 out of 370 (67.3%). Two-hundred sixty-six (71.9%) had hypertension, which was undertreated or untreated in 198 out of 266 (74.4%). Of current smokers, 51 out of 63 (81.0%) had no documented smoking cessation counselling or referrals. Diabetes and triglyceridaemia were generally well managed. Of the cohort, 278 qualified for two widely used online estimators of ASCVD event risk in primary prevention: the ACC-ASCVD Risk Estimator Plus and QRisk3. We also stratified these 278 patients into our recently defined categories of ASCVD event risk in LE. These three methods for estimating ASCVD event risk showed clinically meaningful discordance for 169 out of 278 (60.8%). The documented rate of ASCVD events in the first 10 years after enrolment was 13.5% (95% CI 8.9%, 17.9%), similar between CLE-only and CLE+SLE, indicating an at-risk population despite the preponderance of women and an average age at enrolment of only 47 years.

CONCLUSION

Patients with CLE-only or CLE+SLE are undertreated compared with the new guidelines and, accordingly, they experience a significant burden of ASCVD events. Moreover, it is unclear how to accurately assess their future ASCVD event risk, except that it is substantial. Efforts are underway to improve ASCVD event risk estimation and guideline implementation in patients with lupus.

Cutaneous lupus erythematosus is associated with an increased risk of cardiac and vascular diseases: a large-scale, propensity-matched global retrospective cohort study

BACKGROUND

Autoimmune skin diseases can expedite various systemic sequelae involving other organs. Although limited to the skin, cutaneous lupus erythematosus (CLE) was noted to be associated with thromboembolic diseases. However, small cohort sizes, partially discrepant outcomes, missing data on CLE subtypes, and incomplete risk assessment limits these findings.

METHODS

The Global Collaborative Network of TriNetX provides access to medical records of more than 120 million patients worldwide. We used TriNetX to elucidate the risk for cardiac and vascular diseases after diagnosis of CLE, and its subtypes chronic discoid (DLE) and subacute cutaneous lupus erythematosus (SCLE). We included 30,315 CLE, 27,427 DLE, and 1613 SCLE patients. We performed propensity-matched cohort studies determining the risk to develop cardiac and vascular diseases (ICD10CM:I00-99) following diagnosis of CLE, DLE, or SCLE. Patients with systemic lupus erythematosus were excluded.

FINDINGS

We document that CLE and its subtype DLE but less so SCLE are associated with a higher risk for various cardiac and vascular diseases. This included predominantly thromboembolic events such as pulmonary embolism, cerebral infarction, and acute myocardial infarction, but also peripheral vascular disease and pericarditis. For example, the hazard ratio of arterial embolism and thrombosis was 1.399 (confidence interval: 1.230-1.591, p < 0.0001) following CLE diagnosis. The study is limited by retrospective data collection and reliance on ICD10-disease classification.

INTERPRETATION

CLE and its major subtype DLE are associated with an increased risk for the development of a wide range of cardiac and vascular diseases.

FUNDING

This research was funded by Deutsche Forschungsgemeinschaft (EXC 2167, CSSL/CS01-2022) and the Excellence-Chair Program of the State of Schleswig-Holstein.

Long-term risk of adverse cardiovascular outcomes associated with cutaneous lupus erythematosus: a nationwide cohort study

BACKGROUND

Autoimmune diseases, including systemic lupus erythematosus, have been associated with a substantial risk of cardiovascular morbidity and mortality. However, data on the long-term risk of incident heart failure and other adverse cardiovascular outcomes among patients diagnosed with cutaneous lupus erythematosus (CLE) are limited.

METHODS

In this cohort study, all patients ≥ 18 years with newly diagnosed CLE between 1996 and 2018 were identified through Danish nationwide registries and matched 1:4 by age, sex, and comorbidity with individuals without CLE. Incident adverse cardiovascular outcomes, including heart failure, were compared between the matched groups, overall, and according to sex.

RESULTS

Of 2085 patients diagnosed with CLE, 2062 patients were matched with 8248 control subjects from the Danish background population (median age 50 years [25th-75th percentile: 37-62 years]; 22.3% men). The median follow-up was 6.2 years. The 10-year cumulative incidences and adjusted hazard ratios (HR) of outcomes were as follows: heart failure: 3.29% (95% CI, 2.42-4.36%) for CLE patients versus 2.59% (2.20-3.02%) for the background population, HR 1.67 (95% CI, 1.24-2.24); atrial fibrillation or flutter: 5.15% (3.99-6.52%) versus 3.84% (3.37-4.36%), HR 1.40 (1.09-1.80); the composite of ICD implantation, ventricular arrhythmia, or cardiac arrest: 0.72% (0.34-1.40%) versus 0.44% (0.29-0.64%), HR 1.71 (0.85-3.45); the composite of pacemaker implantation, atrioventricular block, or sinoatrial dysfunction: 0.91% (0.48-1.59%) versus 0.54% (0.37-0.76%), HR 1.32 (0.72-2.41); myocardial infarction: 3.05% (2.18-4.15%) versus 1.59% (1.29-1.93%), HR 2.15 (1.53-3.00); ischemic stroke: 3.25% (2.38-4.32%) versus 2.50% (2.13-2.93%), HR 1.56 (1.16-2.10); and venous thromboembolism: 2.74% (1.94-3.75%) versus 2.05% (1.71-2.44%), HR 1.60 (1.16-2.21). Sex did not modify the association between CLE and adverse cardiovascular outcomes (P_interaction ≥ 0.12 for all outcomes).

CONCLUSIONS

Patients with CLE had a higher associated risk of adverse cardiovascular outcomes compared with the background population, irrespective of sex. Key Points • Findings: In this nationwide cohort study, including 2062 patients with cutaneous lupus erythematosus and 8248 matched controls, cutaneous lupus erythematosus was associated with an increased long-term risk of heart failure, cardiac arrhythmias, and thromboembolic events, irrespective of sex.

Cardiovascular Disease-Associated Skin Conditions

According to data from the American Heart Association and the World Health Organization, cardiovascular disease (CVD) is the most frequent cause of premature death. Several inflammatory and non-inflammatory skin diseases have been associated with metabolic syndrome and cardiovascular risk (CVR). Here, we classified these conditions into traditionally CVR-associated and those that have been linked to a lesser degree. Psoriasis and hidradenitis suppurativa are commonly associated with CVD, sharing common inflammatory pathways and a higher prevalence of traditional cardiovascular risk factors. Many other diseases could be associated indirectly – with no common pathogenic features with the atheromatous disease – but share a higher prevalence of standard cardiovascular risk and chronic inflammatory state. This review aims to highlight the associated cardiovascular risk that exists for some dermatologic diseases and sensitize cardiologists, dermatologists, and first care providers to implement risk factor control promptly.

Assessment and management of the heightened risk for atherosclerotic cardiovascular events in patients with lupus erythematosus or dermatomyositis

For patients with lupus erythematosus (LE) or dermatomyositis (DM), there is an urgent need to address a heightened risk of clinical events, chiefly heart attacks and strokes, caused by atherosclerotic cardiovascular disease (ASCVD). Patients with LE or DM frequently exhibit high levels of conventional risk factors for ASCVD events, particularly dyslipoproteinemia and hypertension; an amplified burden of atherosclerotic plaques; and increased age- and sex-adjusted rates of ASCVD events compared with the general population. The rate of ASCVD events exceeds what would be expected from conventional risk factors, suggesting that disease-specific autoimmune processes exacerbate specific, known pathogenic steps in atherosclerosis. Importantly, despite their heightened risk, patients with LE or DM are often undertreated for known causative agents and exacerbators of ASCVD. Herein, we propose an approach to assess and manage the heightened risk of ASCVD events in patients with LE or DM. Our approach is modeled in large part on established approaches to patients with diabetes mellitus or stage 3 or 4 chronic kidney disease, which are well-studied conditions that also show heightened risk for ASCVD events and have been explicitly incorporated into standard clinical guidelines for ASCVD. Based on the available evidence, we conclude that patients with LE or DM require earlier and more aggressive screening and management of ASCVD. We suggest that physicians consider implementing multipliers of conventional risk calculators to trigger earlier initiation of lifestyle modifications and medical therapies in primary prevention of ASCVD events, employ vascular imaging to quantify the burden of subclinical plaques, and treat to lower lipid targets using statins and newer therapies, such as PCSK9 inhibitors, that decrease ASCVD events in nonautoimmune cohorts. More clinical vigilance is needed regarding surveillance, prevention, risk modification, and treatment of dyslipidemias, hypertension, and smoking in patients with LE or DM. All of these goals are achievable.