The autoinflammatory side of recurrent pericarditis: Enlightening the pathogenesis for a more rational treatment

Incidence of secondary pericardial effusions associated with different etiologies: a comprehensive review of literature

Pericardial effusion is a relatively common complication associated with inflammatory and non-inflammatory diseases. The primary etiology of this condition could be considered when choosing therapeutic options and factors such as effusion size and its hemodynamic consequence. In most cases, small to moderate pericardial effusions can be managed with observation and anti-inflammatory medications unless the effusion develops rapidly. However, in a small proportion of patients, large effusions lead to impaired cardiac filling with hemodynamic compromise and cardiovascular collapse due to cardiac tamponade. The rate at which fluid accumulates is the primary determinant of hemodynamic impact and thus guides the choice of treatment, irrespective of the effusion's size. Severe cases are typically treated with pericardiocentesis with echocardiographic guidance. More aggressive treatments may be necessary for cases due to purulent or malignant etiologies. These cases may require a pericardial window to allow for long-term drainage of the pericardial fluid. This comprehensive review focuses on the epidemiology of pericardial effusion and discusses pathophysiology, diagnostic approaches, and therapeutic options for different causes of secondary pericardial effusions.

Old and New Biomarkers in Idiopathic Recurrent Acute Pericarditis (IRAP): Prognosis and Outcomes

PURPOSE OF REVIEW

To outline the latest discoveries regarding the utility and reliability of serum biomarkers in idiopathic recurrent acute pericarditis (IRAP), considering recent findings on its pathogenesis. The study highlights the predictive role of these biomarkers in potential short- (cardiac tamponade, recurrences) and long-term complications (constrictive pericarditis, death).

RECENT FINDINGS

The pathogenesis of pericarditis has been better defined in recent years, focusing on the autoinflammatory pathway. New studies have demonstrated the pivotal role of the classical inflammatory biomarkers in distinguishing pericarditis phenotypes (high-grade vs. low-grade inflammation) and in defining outcomes of this condition. Pericarditis involves intense inflammatory activity, which causes elevation of different markers, such as C-reactive protein, erythrocyte sedimentation rate, neutrophils and platelets, serum amyloid A and D-Dimer. Conversely, lymphocytes are often reduced, as well as hemoglobin during the acute phase. Cardiac troponins T and I are elevated in up to 30% of cases. A Biomarker for CRP-negative cases is needed. Other markers have been proposed for diagnosis and prognosis in IRAP, such as anti-heart antibodies and anti-intercalated disk antibodies, but we need further studies to validate them.

Recurrent pericarditis and interleukin (IL)-1 inhibitors

Recurrent pericarditis (RP) is defined by the European Society of Cardiology (ESC) as an instance of acute pericarditis (AP) that occurs at least 4-6 weeks after the resolution of a previous episode of the same ailment. To mitigate the risk of RP, it is advised to administer accurate and prolonged pharmacological treatment for both the initial AP and subsequent RP. ESC guidelines recommend commencing treatment for any single episode of AP, including those that contribute to RP, with non-steroidal anti-inflammatory drugs (NSAIDs) in conjunction with colchicine for several months, often followed by gradual tapering. If there is an inadequate response, corticosteroids (CS) may be introduced cautiously. However, in a minority of cases, even when NSAIDs, colchicine, and CS are administered together at the highest recommended dosages, they may prove ineffective. In such instances, treatment with immunosuppressive drugs or biologics is advised. Among biologics, interleukin (IL)-1 inhibitors have been extensively studied, although certain gaps remain. This narrative review delves into the rationale for employing IL-1 inhibitors and presents findings from existing studies regarding their efficacy, tolerability, and safety. Analysis of the literature indicates that there is currently insufficient data to ascertain the true therapeutic role of IL-1 inhibitors in managing and preventing RP. However, theoretically, drugs targeting both IL-1α and IL-1β may offer superior efficacy compared to those solely targeting IL-1β due to the significant involvement of both cytokines in inflammation. Further research is warranted to determine the comparative effectiveness of IL-1α and IL-1β inhibitors.

Decrease in Hemoglobin Levels during Acute Attacks in Patients with Idiopathic Recurrent Pericarditis: A Model of Anemia in Acute Disease

Background/Objectives: Anemia during acute inflammation is not well described in the literature. We aimed to study whether patients develop a transient hemoglobin decrease during an acute attack of recurrent pericarditis. Methods: We retrospectively analyzed patients with recurrent pericarditis. The primary endpoint was the difference in hemoglobin levels during an acute attack and in the following remission. As secondary endpoints, we correlated this variation with laboratory and clinical features; we also evaluated the available baseline hemoglobin values. Results: Sixty-two patients, including thirty females (48.4%), with a median age of 39 years, were observed during an acute attack and remission. The attack indexed was the first in 21 patients and the second or the third in 41, with pre-attack hemoglobin levels available for the latter group. Median hemoglobin levels (IQR) were 13.8 (12.8-15.1) g/dL at baseline, 12.0 (11.2-13.4) during attacks and 13.6 (13.1-14.0) during remission (p < 0.001). The median hemoglobin reduction between an acute attack and remission was 1.4 g/dL. Their mean corpuscular volume remained in the normal range. Hb reduction significantly correlated with C-reactive protein (CRP) elevation, neutrophilia and the neutrophil-to-lymphocyte ratio, but not serosal involvement. Only CRP elevation remained associated with the variation of Hb in a multivariate analysis (p = 0.007). Conclusions: This study is a proof of concept: hemoglobin levels may decline rapidly during acute inflammation in correlation with CRP elevation, with transient normocytic anemia, followed by a rapid rebound. In this regard, idiopathic pericarditis may represent a pathogenetic model of this type of anemia.

Novel Treatments in Refractory Recurrent Pericarditis

Refractory recurrent pericarditis is a troublesome condition that severely impairs the quality of life of affected patients and significantly increases healthcare spending. Until recently, therapeutic options included only a few medications and most of the patients resorted to chronic glucocorticoid treatment with steroid dependence. In the most recent decade, the introduction of interleukin-1 blockers in clinical practice has revolutionized the treatment of glucocorticoid-dependent and colchicine-resistant recurrent pericarditis due to their excellent efficacy and good safety profile. The rationale for the introduction of this class of medications in clinical practice is the autoinflammatory nature of recurrent pericarditis in a substantial rate of cases, with interleukin-1 being the main pro-inflammatory cytokine involved in this context. This review aims to discuss the contemporary available evidence from original research and real-world data on interleukin-1 blocker use in refractory recurrent pericarditis, in terms of indications, mechanism of action, efficacy, side effects, and recommended treatment protocols. Moreover, novel treatment proposals, such as hydroxychloroquine, beta blockers, and cannabidiol, which showed encouraging preliminary results, are addressed. Finally, gaps in knowledge, unmet needs, and future perspectives related to recurrent pericarditis are thoroughly discussed.

Disease phenotypes in adult patients with suspected undifferentiated autoinflammatory diseases and PFAPA syndrome: Clinical and therapeutic implications

BACKGROUND

Undifferentiated autoinflammatory diseases are characterized by recurrent or persistent fever, usually combined with other inflammatory manifestations, and negative or inconclusive genetic studies for monogenic autoinflammatory disorders.

AIMS

To define and characterize disease phenotypes in adult patients diagnosed in an adult reference center with undifferentiated autoinflammatory diseases, and to analyze the efficacy of the drugs used in order to provide practical diagnostic and therapeutic recommendations.

METHODS

Retrospective study (2015-2022) of patients with undifferentiated autoinflammatory diseases among all patients visited in our reference center. Demographic, clinical, laboratory features and detailed therapeutic information was collected.

RESULTS

Of the 334 patients with a suspected autoinflammatory disease, 134 (40%) patients (61% women) were initially diagnosed with undifferentiated autoinflammatory diseases. Mean age at disease onset and at diagnosis was 28.7 and 37.7 years, respectively. In 90 (67.2%) patients, symptoms started during adulthood. Forty-four (32.8%) patients met diagnostic/classification criteria for adult periodic fever with aphthous stomatitis, pharyngitis and cervical adenitis (PFAPA) syndrome. In the remaining patients, four additional phenotypes were differentiated according to the predominant manifestations: a) Predominantly fever phenotype (n = 18; 13.4%); b) Predominantly abdominal/pleuritic pain phenotype (n = 9; 6.7%); c) Predominantly pericarditis phenotype (n = 18; 13.4%), and d) Complex syndrome phenotype (n = 45; 33.6%). Prednisone (mainly on demand), colchicine and anakinra were the drugs commonly used. Overall, complete responses were achieved with prednisone in 41.3%, colchicine in 40.2%, and anakinra in 58.3% of patients in whom they were used. By phenotypes, prednisone on demand was more effective in adult PFAPA syndrome and colchicine in patients with the abdominal/pleuritic pain pattern and PFAPA syndrome. Patients with complex syndrome achieved complete responses with prednisone (21.9%), colchicine (25.7%) and anakinra (44.4%), and were the group more often requiring additional immunosuppressive drugs.

CONCLUSIONS

The analysis of the largest single-center series of adult patients with undifferentiated autoinflammatory diseases identified and characterized different disease phenotypes and their therapeutic approaches. This study is expected to contribute to increase the awareness of physicians for an early identification of these conditions, and to provide the best known therapeutic options.

Cardiovascular adverse events associated with immune checkpoint inhibitors: a meta-analysis

Objective

To evaluate the cardiovascular safety of anticancer drug immune checkpoint inhibitors (ICIs) used in patients with malignant tumors.

Methods

Four clinical research databases that have been completed since their establishment were searched, and the odds ratios and 95% confidence intervals of each indicator were statistically calculated.

Results

62 randomized controlled trial and controlled trials were included. In single drug treatment ICIs group, the overall risk of cardio cerebral Vascular disease at all levels was higher than that in the placebo/chemotherapy group. Especially in all grades of Myocarditis and above grade 3 compared with normal controls, except for pericardial lesions, other indicators have no obvious side effects.

Conclusion

Single drug use of an anti-tumor ICIs may increase cardiovascular side effects risk in cancer patients, so we need to strengthen monitoring, identification and management, and timely intervention to manage ICI induced adverse events.

Novel Therapeutic Insights Into the Treatment of Pericarditis: Targeting the Innate Immune System

ABSTRACT

Acute pericarditis is characterized by pericardial inflammation that can be treated with anti-inflammatory drugs. A considerable percentage of patients develops recurrent pericarditis with several relapses. In developed countries, the idiopathic form is the most frequent and has a high risk of recurrences. Two pathophysiological mechanisms have been described for idiopathic recurrent pericarditis: autoimmune and autoinflammatory. The autoimmune mechanism is more frequently encountered in patients with rheumatologic disorders, especially systemic lupus erythematosus. The innate immune system plays a central role in the pathophysiology of pericarditis, especially in the autoinflammatory phenotype. Current evidence highlights the central role played by interleukin 1 and NLRP3 (NACHT, leucine-rich repeat, and pyrin domain-containing protein 3) in idiopathic recurrent pericarditis. Accordingly, interleukin 1 blockers have been approved for the treatment of this condition. Neutrophils are likely to be important in such setting; however, their role has only been partially investigated. In the present review, we have collected the current knowledge on the role of innate immune system in pericarditis pathophysiology and how this can be used to provide targeted treatments for patients with recurrent pericarditis.

Interleukin-1 Blockers: A Paradigm Shift in the Treatment of Recurrent Pericarditis

Recurrent pericarditis is a problematic clinical condition that impairs the quality of life of the affected patients due to the need for repeated hospital admissions, emergency department visits, and complications from medications, especially glucocorticoids. Unfortunately, available treatments for recurrent pericarditis are very limited, including only a handful of medications such as aspirin/NSAIDs, glucocorticoids, colchicine, and immunosuppressants (such as interleukin-1 (IL-1) blockers, azathioprine, and intravenous human immunoglobulins). Until recently, the clinical experience with the latter class of medications was very limited. Nevertheless, in the last decade, experience with IL-1 blockers has consistently grown, and valid clinical data have emerged from randomized clinical trials. Accordingly, IL-1 blockers are a typical paradigm shift in the treatment of refractory recurrent pericarditis with a clearly positive cost/benefit ratio for those unfortunate patients with multiple recurrences. A drawback related to the above-mentioned medications is the absence of universally accepted and established treatment protocols regarding the full dose administration period and the need for a tapering protocol for individual medications. Another concern is the need for long-standing treatments, which should be discussed with the patients. The above-mentioned unmet needs are expected to be addressed in the near future, such as further insights into pathophysiology and an individualized approach to affected patients.

Comprehensive bioinformatics analysis and systems biology approaches to identify the interplay between COVID-19 and pericarditis

Background

Increasing evidence indicating that coronavirus disease 2019 (COVID-19) increased the incidence and related risks of pericarditis and whether COVID-19 vaccine is related to pericarditis has triggered research and discussion. However, mechanisms behind the link between COVID-19 and pericarditis are still unknown. The objective of this study was to further elucidate the molecular mechanisms of COVID-19 with pericarditis at the gene level using bioinformatics analysis.

Methods

Genes associated with COVID-19 and pericarditis were collected from databases using limited screening criteria and intersected to identify the common genes of COVID-19 and pericarditis. Subsequently, gene ontology, pathway enrichment, protein-protein interaction, and immune infiltration analyses were conducted. Finally, TF-gene, gene-miRNA, gene-disease, protein-chemical, and protein-drug interaction networks were constructed based on hub gene identification.

Results

A total of 313 common genes were selected, and enrichment analyses were performed to determine their biological functions and signaling pathways. Eight hub genes (IL-1β, CD8A, IL-10, CD4, IL-6, TLR4, CCL2, and PTPRC) were identified using the protein-protein interaction network, and immune infiltration analysis was then carried out to examine the functional relationship between the eight hub genes and immune cells as well as changes in immune cells in disease. Transcription factors, miRNAs, diseases, chemicals, and drugs with high correlation with hub genes were predicted using bioinformatics analysis.

Conclusions

This study revealed a common gene interaction network between COVID-19 and pericarditis. The screened functional pathways, hub genes, potential compounds, and drugs provided new insights for further research on COVID-19 associated with pericarditis.

Interleukin-1 Blockers in Recurrent and Acute Pericarditis: State of the Art and Future Directions

Diseases of the pericardium encompass a spectrum of conditions, including acute and recurrent pericarditis, where inflammation plays a pivotal role in the pathogenesis and clinical manifestations. Anti-inflammatory therapy indeed forms the cornerstone of treating these conditions: NSAIDs, colchicine, and corticosteroids (as a second-line treatment) are recommended by current guidelines. However, these medications come with several contraindications and are not devoid of adverse effects. In recent years, there has been an increased focus on the role of the inflammasome and potential therapeutic targets. Recurrent pericarditis also shares numerous characteristics with other autoinflammatory diseases, in which interleukin-1 antagonists have already been employed with good efficacy and safety. The objective of this review is to summarize the available studies on the use of anti-IL-1 drugs both in acute and recurrent pericarditis.

Autoinflammatory Recurrent Pericarditis Associated with a New NLRP12 Mutation in a Male Adolescent

Idiopathic recurrent pericarditis (IRP) can be the hallmark of an autoinflammatory syndrome with recurrent attacks of chest pain and symptom-free intervals following an acute episode. The recurrence rate may be 35% in the pediatric population, frequently with less severe manifestations than at the first episode. Pericarditis can be the sole clinical manifestation or may be part of a systemic autoinflammatory disease (SAID), especially in the case of a recurrence. Familial Mediterranean Fever (FMF), Tumor Necrosis Factor Receptor-Associated Periodic Syndrome (TRAPS), Mevalonate-Kinase Deficiency (MKD), nucleotide-binding oligomerization domain 2 (NOD2)-associated autoinflammatory syndrome, and others are closely related to IRP based on similar clinical manifestations and treatment responses to anti-interleukin 1 (IL-1) agents, such as anakinra, and should therefore be excluded in patients with IRP. A newly described SAID, an autosomal dominant disorder known as NLRP12-AID (nucleotide-binding leucine-rich repeat-containing receptor 12-related autoinflammatory disease) is caused by heterozygous mutations in the NLRP12 gene and most commonly affects children. Fewer than 40 pediatric patients with NLRP12-AID have been described in the medical literature, with none presenting with RP. We report a case of relapsing pericarditis responsive to anti-IL-1 therapy in a male adolescent who carried a missense mutation in the NLRP12 gene potentially causative of the excessive activation of inflammatory pathways. This is a unique case in the medical literature that associates recurrent pericarditis in an adolescent presumed to be related to the missense mutation in the NLRP12 gene. The role of the NLRP12 inflammasome in generating and maintaining recurrent pericardial inflammation should be considered.

Cardiovascular Manifestations of Human Monkeypox Virus: An Updated Review

Cardiovascular manifestations in human monkeypox virus (MPXV) infection has gained increasing recognition as significant complications with both social and clinical implications. Myocarditis, viral pericarditis, heart failure, and arrhythmias can occur, leading to adverse effects on individuals' health and quality of life. Understanding the detailed pathophysiology of these cardiovascular manifestations is essential for improved diagnosis and management. The social implications of these cardiovascular complications are multifaceted, ranging from public health concerns and the impact on individuals' quality of life to psychological distress and social stigma. Clinically, diagnosing, and managing these complications present challenges, requiring a multidisciplinary approach and specialized care. The burden on healthcare resources necessitates preparedness and resource allocation to effectively address these complications. We delve into the pathophysiological mechanisms involved, including viral-induced cardiac damage, immune response, and inflammatory processes. Additionally, we explore the types of cardiovascular manifestations and their clinical presentations. Addressing cardiovascular manifestations' social and clinical implications in MPXV infection requires a comprehensive approach involving healthcare professionals, public health authorities, and communities. By prioritizing research, enhancing diagnosis and treatment strategies, and promoting preventive measures, we can mitigate the impact of these complications, improve patient care, and protect public health.

New Developments in the Management of Recurrent Pericarditis

Recurrent pericarditis is a common and troublesome complication that affects 15%-30% of patients with a previous episode of pericarditis. However, the pathogenesis of these recurrences is not well understood, and most cases remain idiopathic. Recent advances in medical therapy, including the use of colchicine and anti-interleukin-1 agents like anakinra and rilonacept, have suggested an autoinflammatory rather than an autoimmune mechanism for recurrences with an inflammatory phenotype. As a result, a more personalized approach to treatment is now recommended. Patients with an inflammatory phenotype (fever and elevated C-reactive protein level) should receive colchicine and anti-interleukin-1 agents as first-line therapy, whereas those without systemic inflammation should receive low to moderate doses of corticosteroids (eg, prednisone 0.2-0.5 mg/kg/d as an initial dose) and consider azathioprine and intravenous human immunoglobulins in the case of corticosteroid failure. Tapering of corticosteroids should be slow after achieving clinical remission. In this article, we review the new developments in the management of recurrent pericarditis.

Acute pericarditis with pleuropulmonary involvement, fever and elevated C-reactive protein: A systemic autoinflammatory disease? A cohort study

OBJECTIVES

This cohort study describes a systemic phenotype of pericarditis, comparing this phenotype with other forms of pericarditis.

PATIENTS AND METHODS

Patients in our center were enrolled in a prospectively maintained registry from 2019 to 2022. 412 patients with idiopathic recurrent pericarditis were analyzed. "Systemic inflammatory" subset was defined as the presence of all the following criteria: fever ≥38C°, CRP ≥2 times normal values, pleural effusion detected with any imaging techniques. The absence of any of the 3 criteria was defined as "isolated" subset.

RESULTS

We found that 211 (51.2%) of 412 patients (188 female) presented the systemic subset and the variables significantly associated with this subset in univariate analysis (p<0.001) were: higher mean age: 45.5 (±SD 17.2) vs 39.9 (±SD 16.4) years, higher mean CRP values: 128.8 vs 49.9 mg/L, higher proportion of pericardiocentesis: 19% vs 1.5%, higher mean leukocyte count: 13,143.3 vs 9910.3/mm3, higher mean neutrophils number: 10,402.5 vs 6779.8 /mm3 and lower mean lymphocyte count: 1693.9 vs 2079.3 /mm3. As results the neutrophil-to-lymphocyte ratio was higher in systemic inflammatory phenotype: 6.6 vs 3.4 (p< 0.001). Anti-IL1 therapy was started more frequently in the systemic subgroup (26%) than in the isolated subset (7.5%) (p < 0.001). On multivariate analysis neutrophil count and lymphopenia were statistically associated with the systemic subset (p < 0.001).

CONCLUSION

This results demonstrate the relevance of the systemic inflammatory phenotype, characterized by pleural effusions, confirming its analogy with autoinflammatory diseases, thus possibly requiring an eventual escalation of therapy to IL-1 inhibitors.

Combining nanotechnology with monoclonal antibody drugs for rheumatoid arthritis treatments

Rheumatoid arthritis (RA) is a systemic immune disease characterized by synovial inflammation. Patients with RA commonly experience significant damage to their hand and foot joints, which can lead to joint deformities and even disability. Traditional treatments have several clinical drawbacks, including unclear pharmacological mechanisms and serious side effects. However, the emergence of antibody drugs offers a promising approach to overcome these limitations by specifically targeting interleukin-1 (IL-1), interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-α), and other cytokines that are closely related to the onset of RA. This approach reduces the incidence of adverse effects and contributes to significant therapeutic outcomes. Furthermore, combining these antibody drugs with drug delivery nanosystems (DDSs) can improve their tissue accumulation and bioavailability.Herein, we provide a summary of the pathogenesis of RA, the available antibody drugs and DDSs that improve the efficacy of these drugs. However, several challenges need to be addressed in their clinical applications, including patient compliance, stability, immunogenicity, immunosupression, target and synergistic effects. We propose strategies to overcome these limitations. In summary, we are optimistic about the prospects of treating RA with antibody drugs, given their specific targeting mechanisms and the potential benefits of combining them with DDSs.

Can Asthma Cause Pericardial Effusion? Insights Into an Intriguing Association

BACKGROUND

Pericardial effusion (PE) is a commonly encountered condition in clinical practice, but its etiology can be difficult to identify, with many cases remaining classified as idiopathic. This study aimed to investigate whether an association exists between asthma and idiopathic PE (IPE).

METHODS

Patients who had been diagnosed with PE in the authors' outpatient cardiology clinics between March 2015 and November 2018 were retrospectively analyzed. The study population was divided into 2 groups-non-IPE (NIPE) and IPE-based on whether a cause had been identified. Demographic, laboratory, and clinical data for the 2 groups were examined statistically.

RESULTS

A total of 714 patients were enrolled in the study after exclusion of 40 cases. Of these 714 patients, 558 were allocated to the NIPE group and 156 to the IPE group (NIPE group median [IQR] age, 50 [41-58] years vs IPE group median [IQR] age, 47 [39-56] years; P = .03). Asthma was significantly more prevalent among patients in the IPE group than among those in the NIPE group (n = 54 [34.6%] vs n = 82 [14.7%]; P < .001). In multivariate logistic regression analysis, asthma (odds ratio, 2.67 [95% CI, 1.53-4.67]; P = .001) was found to be an independent predictor of IPE. In the IPE group, patients with asthma had either mild or moderate PE, with the right atrium being the most common location in these patients.

CONCLUSION

Asthma was an independent predictor of mild to moderate IPE. The right atrium was the most frequently encountered location for PE in patients with asthma.

Relapsing pericarditis: Peripheral blood neutrophilia, lymphopenia and high neutrophil-to-lymphocyte ratio herald acute attacks, high-grade inflammation, multiserosal involvement, and predict multiple recurrences

AIMS

To identify peripheral blood cellular correlates of active pericarditis and to verify whether peripheral blood neutrophils, lymphocytes and the neutrophil to-lymphocyte ratio (NLR) are associated with disease phenotype or prognosis.

METHODS

Observational prospective study on a cohort of 63 patients with idiopathic pericarditis followed for 12 months after each pericarditis recurrence. Two distinct analyses were performed: the "index attack" analysis focused on the first pericarditis episode in each patient, while the "all attacks" analysis included all episodes occurring during the study.

RESULTS

Absolute and relative neutrophilia and lymphopenia, together with high NLR, were observed during active pericarditis, as compared with disease remission, at both analyses. Neutrophils showed a positive correlation with plasma C-reactive protein levels, while lymphocyte count showed a negative correlation. Relative neutrophil count was higher, and lymphocyte count lower in patients with pleural effusion; a higher NLR and lower absolute lymphocyte count were observed in those with peritoneal involvement. No correlations were found between peripheral blood neutrophil or lymphocyte counts and size of pericardial effusion, or with the presence of myocardial involvement. Peripheral neutrophilia, lymphopenia and NLR during acute attacks predicted the number of recurrences in the following 12 months.

CONCLUSIONS

Peripheral blood neutrophilia and lymphopenia are typical of acute idiopathic pericarditis. Acute attacks of pericarditis are associated with neutrophilia and lymphopenia, as compared with disease remission. During acute attacks, neutrophilia and lymphopenia reflect the extent of serosal inflammation and could help to customize therapeutic management after remission has been achieved.

The Role of Colchicine in Different Clinical Phenotypes of Behcet Disease

PURPOSE

Behcet disease (BD) is a multisystemic disorder characterized by variable clinical manifestations that affect nearly all systems and organs. Colchicine, an alkaloid plant extract, is considered as the first-line therapy for gout, pericarditis, and familial Mediterranean fever. However, the role of colchicine in the treatment of different clinical phenotypes of BD has not been clearly described. This narrative review summarizes the clinical use of colchicine in BD.

METHODS

All relevant literature from 1980 to March 2021 was searched in PubMed, MEDLINE, and Cochrane Library. The Medical Subject Heading terms and related words that were searched are as follows: Behcet's disease, Behcet's syndrome, BD, colchicine, management, treatment, and therapy.

FINDINGS

BD is an autoimmune systemic vasculitis with various clinical phenotypes, with involvement of skin mucosa, joints, eyes, and gastrointestinal, vascular, and neurologic systems. Colchicine has been used for centuries, acts by binding to tubulin to prevent the mitotic process, and has anti-inflammatory, antitumor, and antifibrotic properties. Colchicine has been reported to be an effective option for the treatment of skin, mucosal, and joint involvement in patients with certain BD clinical phenotypes.

IMPLICATIONS

Colchicine reduces the severity of certain clinical phenotypes and may improve the overall disease activity index in patients with BD. More randomized clinical trials are needed to confirm the value of colchicine in the treatment of BD, and further elucidation of the mechanisms is also needed, which may reveal new application of colchicine that has been used for centuries.

Off-label use of canakinumab in pediatric rheumatology and rare diseases

Since the first success of interleukin-1 blockade in cryopyrin-associated periodic syndrome, the use of interleukin-1 inhibitors has expanded to other disorders, including off-label indications. In particular, canakinumab has been employed in an off-label fashion in several diseases such as rare monogenic autoinflammatory diseases and multifactorial autoinflammatory diseases, disclosing an excellent efficacy and good safety profile in pediatric patients unresponsive to standards of care. In addition, hyperferritinemic syndromes and complex disorders, as well as Kawasaki disease, uveitis, and other pediatric rare disorders, represent additional areas where canakinumab efficacy is worth exploring. Altogether, the results summarized below are of paramount importance in pediatric patients where a considerable proportion of treatments are prescribed off-label. This review focuses on the off-label use of canakinumab in pediatric patients affected by systemic immune-mediated diseases.

Advances in Imaging and Targeted Therapies for Recurrent Pericarditis: A Review

Importance

Pericarditis is the most common form of pericardial disease. Recurrence of pericarditis affects 15% to 30% of patients after the initial episode of pericarditis. Up to 50% of patients with the first recurrence have additional recurrences. These patients often progress to have colchicine-resistant and corticosteroid-dependent disease. Rapidly evolving cardiac magnetic resonance imaging techniques and novel targeted therapies have paved the way for imaging-guided therapy for recurrent pericarditis. However, the optimal application of these recent advances remains unclear.

Observations

A search was conducted using the PubMed and Cochrane databases for English-language studies, management guidelines, meta-analyses, and review articles published until April 2022 on recurrent pericarditis. Following the 2015 European Society of Cardiology guidelines for the diagnosis and management of pericardial diseases, new clinical trials and registry data have emerged that demonstrate the efficacy of interleukin-1 blockers in recurrent pericarditis. In addition, new observational data have come to light supporting the use of cardiac magnetic resonance imaging in the diagnosis, risk stratification, and management of such patients.

Conclusions and Relevance

Advances in imaging and targeted therapies have led to a paradigm shift in the management of recurrent pericarditis. This narrative review summarizes the established and emerging data on the diagnosis and treatment of recurrent pericarditis with special emphasis on the role of cardiac magnetic resonance imaging and interleukin-1 blockers in the current era of tailored therapy for recurrent pericarditis.

Pericardial Involvement in Severe COVID-19 Patients

Background and Objectives: SARS-CoV-2 has an extensive tissue tropism due to its ability to attach to the surfaces of cells through different receptors, leading to systemic complications. In this article, we aim to present the prevalence of pericardial effusions in patients with severe COVID-19, to identify the risk factors/predictors for pericardial involvement, and to evaluate its impact on overall mortality. Materials and Methods: We enrolled 100 patients with severe COVID-19 in our observational cohort study and divided them in two groups: Group A (27 patients with pericardial effusion) and Group B (73 patients without pericardial effusion). We recorded demographic and lifestyle parameters, anthropometric parameters, clinical parameters, inflammation markers, respiratory function parameters, complete blood count, coagulation parameters, and biochemical serum parameters. All patients were evaluated by computer tomography scans within 48 h of admission. Results: The median age was 61 years in both groups and the male/female ratio was 3.5 vs. 2.8 in Group A vs. Group B. We identified mild pericardial effusion (3–4 mm) in 62.9% patients and moderate pericardial effusion (5–9 mm) in 37.1% patients, with a median value of 4 [3;6] mm. The patients with pericardial effusion presented with higher percentages of obesity, type-2 diabetes mellitus, arterial hypertension, and congestive heart failure, without statistical significance. Increased values in cardiac enzymes (myoglobin, CK, CK-MB) and LDH were statistically associated with pericardial effusion. The overall mortality among the participants of the study was 24% (24 patients), 33.3% in Group A and 20.8% in Group B. Conclusions: Pericardial effusion has a high prevalence (27%) among patients with severe forms of COVID-19 and was associated with higher mortality. Pericardial effusion in our study was not associated with the presence of comorbidities or the extent of lung involvement. Overall mortality was 60% higher in patients with pericardial effusion.

Serosal Involvement in Adult-Onset Still's Disease: A Multicenter and Retrospective Study

BACKGROUND

This study evaluated the characteristics of serosal involvement in Adult-onset Still's disease.

METHODS

Patients meeting the Yamaguchi classification criteria were classified into AOSD with and without serosal involvement according to their manifestations and sonography/radiography. Clinical data were retrospectively reviewed from 102 AOSD patients of two centers.

RESULTS

Forty-two patients (41.2%) had serosal involvement. The frequencies of pulmonary infiltrate and impaired liver function were significantly higher in patients with serosal involvement (P=0.002 and P=0.007, respectively), who also had a higher modified systemic score (P=0.009). In addition, the percentages of CD3+ T cells (P<0.0001) and, especially, the CD8+ T cells (P=0.004) were significantly increased in the peripheral blood of AOSD patients with serosal involvement. Notably, patients with serosal involvement were more likely to develop MAS (P=0.047) and develop into chronic pattern (P=0.016) during the follow-up.

CONCLUSION

Patients with serosal involvement demonstrated the more severe disease activity and different immune phenotypes, and these patients were more likely to develop MAS, and they may require more aggressive treatment at an early time to control their systemic inflammation.

Pericardial effusion in giant cell arteritis is associated with increased inflammatory markers: a retrospective cohort study

OBJECTIVE

Giant cell arteritis (GCA) is the most frequent vasculitis affecting adults aged > 50 years. Cardiac involvement in GCA is considered rare, and only a few cases of pericarditis have been reported. The aim of this study was to determine the characteristics and prognosis of GCA patients suffering from pericardial involvement at diagnosis.

METHODS

We conducted a single-centre, retrospective chart review of patients with GCA in internal medicine departments (from 2000 to 2020). Patients were identified through a centralized hospital database. We retrospectively collected demographic, clinicobiological, histological, imaging, treatment and outcome data. Patients with pericardial effusion, defined as an effusion visible on the CT-scan performed at GCA diagnosis were compared to those without pericardial involvement.

RESULTS

Among the 250 patients with GCA, 23 patients (9.2%) had pericardial effusion on CT-scan. The comparison between the groups revealed similar distribution of age, gender, cranial symptoms and ocular ischaemic complications. Patients with pericardial effusion had a higher frequency of weight loss. They also had lower haemoglobin levels and higher platelet levels (p = 0.006 and p = 0.002, respectively), and they more frequently had positive temporal artery biopsy. There were no differences concerning the treatment, relapses, follow-up duration or deaths.

CONCLUSIONS

This case series sheds light on GCA as a cause of unexplained pericardial effusion or symptomatic pericarditis among adults aged > 50 years and elevated inflammatory biological markers. Fortunately, pericardial involvement is a benign GCA manifestation. In that context, the search for constitutional symptoms, cranial symptoms and associated signs of polymyalgia rheumatica is crucial for rapidly guiding GCA diagnosis.

Anakinra effectiveness in refractory polyserositis: An Italian multicenter study

OBJECTIVES

Polyserositis is an inflammatory condition involving different serosal membranes at the same time, specifically the pericardium, pleura, and peritoneum with exudates in the respective cavities. Treatment with non-steroidal anti-inflammatory drugs (NSAIDs), colchicine and glucocorticoids may be effective in patients with polyserositis, but relapses often occur when these drugs are tapered or discontinued. The interleukin (IL)-1 receptor antagonist anakinra has shown a beneficial effect in idiopathic recurrent pericarditis, mostly in unresponsive patients who develop steroid dependence and/or colchicine resistance. To date, there are no data suggesting the best therapy for managing acute episodes and/or relapses of polyserositis. On this basis, we performed a retrospective study aimed at evaluating the effectiveness and safety profile of anakinra in treating patients with refractory polyserositis.

METHODS

Patients with idiopathic polyserositis or rheumatic diseases presenting inflammation of 2 or more serous membranes were included. Serositis had to be confirmed by imaging tests comprising either echocardiography, abdominal ultrasound, chest or abdomen computed tomography and/or chest x-ray scan. We included patients with polyserositis who started anakinra from January 2011 to January 2019 due to a poorly controlled disease despite treatment with NSAIDs, conventional immunosuppressant drugs, or the need to minimize oral corticosteroids intake. Erythrocyte sedimentation rate (ESR), C reactive protein (CRP), and imaging tests, were recorded to monitor serositis at baseline and either at 3, 6 and 12-month follow-up. Patients with malignancies and infectious diseases were excluded from the analysis.

RESULTS

Forty-five patients with recurrent polyserositis (23 women) (mean age 43.2±15.8 years and mean disease duration 23.1±28 years) were analysed. Polyserositis was idiopathic in 26 (57.8%) patients. Thirteen patients suffered from autoinflammatory diseases, whereas 6 were affected by autoimmune diseases. Combination treatment with colchicine and NSAIDs at anakinra baseline was administered in 38/45 (84.4%) and 37/45 (82.2%) patients, respectively. After starting anakinra, 84.5% of patients experienced a resolution of serositis with a dramatic decrease in ESR and CRP (P<0.001, for both) already at 3 months, furthermore the same beneficial effect was observed up to 12 months. No relapse was seen at 3 months, whereas the median number of relapses at 6 and 12 months was 0 (interquartile range 0-1). Glucocorticoids were discontinued in 22/45 (48.9%) patients already after 3 months (P<0.001). After 12 months 32/37 (86.5%) patients were steroid-free. Similarly, NSAIDs use significantly was decreased at 3 months (7/45 [15.6%] patients, P<0.001), whereas at 12-month follow-up no patient was on NSAIDs. Urticarial rashes at anakinra injection site occurring in 3 patients were the most common adverse events.

CONCLUSIONS

Anakinra appeared to be a safe and useful therapeutic choice for patients refractory to optimal anti-inflammatory therapy (NSAIDs, colchicine and corticosteroids), allowing not only a dramatic reduction of recurrences but also of corticosteroids use. Anakinra was effective both in the idiopathic forms of polyserositis and in those with an underlying rheumatic disease, suggesting a common pathogenic pathway leading to serositis onset.

Disease and Economic Burden Associated with Recurrent Pericarditis in a Privately Insured United States Population

INTRODUCTION

Approximately 30% of patients with a first acute pericarditis episode experience a recurrence ≤ 18 months; ~ 15% experience multiple recurrences. This study assessed the recurrence and economic burden among patients with multiple recurrences.

METHODS

Adults with idiopathic pericarditis were identified in the OptumHealth Care Solutions, Inc., database (2007-2017). Recurrent pericarditis (RP) was defined as ≥ 2 episodes of care separated by > 28 days; multiple recurrences were defined as ≥ 2 recurrences.

RESULTS

Among 944 patients with RP, 375 (39.7%) experienced multiple recurrences and were propensity score-matched 1:1 to 375 patients without recurrence. Among patients with multiple recurrences, median disease duration (time from first episode to end of last recurrence, confirmed by a 1.5-year recurrence-free period) was 2.84 years. The multiple recurrences cohort had higher rates of hospitalizations per-patient-per-month (PPPM) than the no recurrence cohort (rate ratio [95% confidence interval (CI)] = 2.22 [1.35-3.65]). Mean total healthcare costs were significantly higher in the multiple recurrences versus no recurrence cohort ($2728 vs. $1568 PPPM, cost ratio [95% CI] = 1.74 [1.29-2.32]), mainly driven by higher hospitalization costs in the multiple recurrences cohort (mean: $1180 vs. $420 PPPM, cost ratio [95% CI] = 2.81 [1.80-4.66]). Mean work loss costs were higher in the multiple recurrences versus no recurrence cohort ($696 vs. $169 PPPM, cost ratio [95% CI] = 4.12 [1.64-9.61]). In patients with multiple recurrences, mean cost of the first episode was $19,189; subsequent recurrences ranged from $2089 to $7366 (second recurrence = $6222).

CONCLUSION

In conclusion, among patients with multiple pericarditis recurrences, disease symptoms persisted several years, and healthcare and work loss costs were further compounded in this subset of patients.

Early introduction of anakinra improves acute pericarditis and prevents tamponade in Staphylococcal sepsis

The clinical response to anakinra observed by this patient concurrently treated with antibiotics indirectly confirms the potentially pathogenic role of IL-1 in maintaining the pericardial disease and shows how IL-1 blockade might allow avoiding the pericardiocentesis procedure. The report supports the hypothesis that anakinra is an effective and safe tool in the early treatment of acute pericarditis of presumed bacterial origin nonresponding to targeted antibiotic therapy.

Autoimmune and Autoinflammatory Pericarditis: Definitions and New Treatments

PURPOSE OF THE REVIEW

The purpose of the review is to analyze the pathogenetic mechanisms that underlie acute pericarditis, with attention to autoimmune and autoinflammatory pericarditis, and, in addition, to review the available therapeutic armamentarium.

RECENT FINDINGS

Several studies have been published on the use of anti-IL-1 drugs in recurrent pericarditis, including anakinra and rilonacept. The latest, the RHAPSODY study, based on the use of rilonacept in recurrent pericarditis, has recently reached phase 3 with promising results in terms of efficacy and safety. Alterations in the function of the inflammasome and the consequent overproduction of IL-1 play a pivotal role in the genesis of autoinflammatory pericarditis. Recent studies added evidence to the importance of anti-IL-1 drugs in the treatment of recurrent pericarditis with raised C-reactive protein. In the era of tailored medicine, anti-IL-1 agents may be very useful in the subset of patients with recurrent pericarditis and a clear inflammatory phenotype.

Pericardial Diseases in COVID19: a Contemporary Review

PURPOSE OF REVIEW

Coronavirus disease 2019 (COVID19) involves the heart, including pericardium. This article reviews the possible pathophysiological mechanisms in pericardial involvement in COVID19 and pericardial manifestations of COVID19. It also summarizes the patients with pericarditis secondary to COVID19 and outlines the contemporary treatment strategies in this patient population.

RECENT FINDINGS

A high degree of suspicion is required to identify the pericardial involvement in COVID19 patients. It is proposed that an underlying hyperinflammatory reaction in COVID19 leads to pericardial inflammation. Acute pericarditis with or without myocardial involvement is diagnosed on clinical presentation, serum inflammatory markers, electrocardiogram, and echocardiogram. Multimodality imaging may also have an additional diagnostic value. Patients are usually managed medically, but some patients develop a life-threatening pericardial tamponade necessitating pericardial drainage. Pericardial involvement is an important clinical manifestation of COVID19 requiring a proper workup. Timely diagnosis and a specific management plan based on the presentation and concomitant organ involvement usually lead to a complete recovery.

Recurrent pericarditis: an update on diagnosis and management

Recurrent pericarditis is a true challenge for clinicians, especially when the patient becomes unresponsive or not tolerant to conventional treatments. An accurate diagnosis of recurrent pericarditis, possibly supported by advanced imaging tools, is critical to provide timely and appropriate treatment of symptoms and prevention of further episodes. The incessant research on the inflammatory pathways underlying cardiovascular diseases, led recently to the assessment of anti interleukin-1 agents in the setting of recurrent pericarditis. This review will focus on the diagnostic assessment of recurrent pericarditis, along with the most modern therapeutic advances in this field. Bibliographic databases were searched (MEDLINE/PubMed, BioMed Central, the Cochrane Collaboration Database of Randomized Trials, Scopus, ClinicalTrials.gov, EMBASE, Google Scholar) using the terms "recurrent pericarditis" AND "diagnosis" OR "treatment" OR "IL-1" OR "inflammation".