NCT06293924

Pericardial Fluid Analysis in Recurrent Pericarditis

The Pericardial Fluid Analysis in Recurrent Pericarditis Trial

• Status: Enrolling By Invitation
• Phase: —
• Study type: Observational
• Enrollment: 432 (estimated)
• Sponsor: ASST Fatebenefratelli Sacco · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This clinical trial aims to examine the biochemical and cytological features of pericardial effusion during acute and recurrent pericarditis and to understand the molecular factors responsible for pathogenesis. The primary objective of this study is to identify and validate diagnostic criteria in pericardial fluid analysis that can differentiate patients with acute and recurrent pericarditis from those with only pericardial fluid but no inflammation. This study will enroll patients with acute pericarditis who require pericardiocentesis for either diagnostic or therapeutic purposes. Two control groups will also be included: one consisting of patients who need cardiac surgery with a collection of pericardial fluid, and the other consisting of patients who require pericardiocentesis for non-inflammatory pericardial effusion. The purpose of the study is to compare the cell activation status and cytokines present in pericardial fluid during acute pericarditis with those present during other pericardial pathologies.

Detailed description

Idiopathic recurrent pericarditis is a condition characterized by recurrent inflammation of the pericardial sac and sometimes another serosa, accompanied by systemic signs and symptoms. Differential diagnosis of this condition includes all forms of pericarditis secondary to other diseases such as infections, autoimmune and autoinflammatory diseases, malignancy and other conditions (post-actinic, post-traumatic, post-pericardiotomy or post-infarct pericarditis, or those associated with metabolic dysregulations such as uremia). Some patients have pericardial effusion without any signs of inflammation: this condition is known as idiopathic pericardial effusion. The analysis of pericardial effusion helps diagnostic and therapeutic decisions. European Society of Cardiology (ESC) guidelines recommend pericardial fluid analysis from pericardiocentesis or surgical access only whenever a suspected infectious or neoplastic form. Pericardiocentesis is also a procedure used to remove excess fluid from the sac surrounding the heart with hemodynamic effects on ventricular diastolic filling. It is performed in emergencies such as cardiac tamponade to relieve pressure on the heart. The causes and mechanisms of idiopathic pericarditis are not yet well understood. However, studies have shown that colchicine, a medication used to treat this condition, can prevent the formation of microtubules, the migration of neutrophils, and the formation of the NLRP3 inflammasome. These factors have been suggested to play a role in the development of this disease. In addition, research has focused on the use of Anakinra, an anti-interleukin 1 (IL-1) drug, in the treatment of acute pericarditis. This confirms the possible involvement of IL-1 beta in this disease. It is produced by the activation of a complex called NLRP3 inflammasome, which is triggered by microbial products (PAMPs), urate crystals, cholesterol, and molecules known as damage-associated molecular patterns (DAMPs). Therapeutic options for idiopathic pericarditis include colchicine, non-steroidal anti-inflammatory drugs (NSAIDs), steroids, and IL-1 antagonists to regulate inflammation and leukocyte migration. This study focuses on two main unmet needs related to acute and recurrent pericarditis. The first need is related to the informativeness of the data obtained through pericardiocentesis. Although the biochemical analysis is recommended by ESC guidelines, the most valuable data in the diagnostic process comes from cytological and microbiological analyses. These analyses help in excluding neoplastic or infectious etiologies. Biochemical features of pericardial fluid are less understood than those of peritoneal and pleural fluids. Specific biochemical parameters used to distinguish exudation as Light's criteria do not apply to pericardial fluid: a previous study showed a unique composition of pericardial fluid, which suggests that Light's criteria cannot be used in this case. The second unsatisfied need is related to pathogenesis, including the pathway of Interleukin-1 (IL-1) at the level of pericardial fluid and which cells are responsible for local cytokines and inflammatory mediators productions. This study aims to collect observational data on pericardial effusion analysis and to analyse cellular and molecular composition in a subgroup of patients to assess the pathophysiological mechanisms of disease.

Conditions

• Acute Pericarditis
• Pericardial Effusion
• Pericardial Disease
• Pericardial Fluid Exudate
• Autoinflammatory Disorders
• Autoinflammatory Disease

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	Pericardiocentesis	Enrolled patients will not undergo any invasive investigations outside of normal clinical practice. Patients with acute pericarditis and non-inflammatory pericardial effusion will undergo pericardiocentesis for diagnostic or therapeutic purposes. Four ml of pericardial fluid will be collected: 2 ml for biochemical analysis in lithium heparin or serum-gel separator-associated tubes, and 2 ml for cellular analysis in K3 EDTA tubes.
DIAGNOSTIC_TEST	Pericardiotomy	During any type of cardiac surgery involving pericardiotomy, 4 ml of pericardial fluid will be collected and analyzed upon opening the pericardial sac of enrolled patients. Four ml of pericardial fluid will be collected: 2 ml for biochemical analysis in lithium heparin or serum-gel separator-associated tubes, and 2 ml for cellular analysis in K3 EDTA tubes.
DIAGNOSTIC_TEST	Cytofluorometry and Gene expression analysis	A 30 ml sample of peripheral venous blood in K3 EDTA tubes will be collected by enrolled patients who participating in the translational substudy and stored with pericardial fluid samples. Pericardial fluid cells by lineage and expression of inflammatory cytokines will be characterized through cytofluorometry and expression profile analysis of transcribed RNAs. Cytokine concentrations in peripheral blood and pericardial fluid will be analyzed by molecular assay. Peripheral blood mononucleated cells (PBMCs) and pericardial fluid cells will be cultured in vitro and exposed to the main therapies used during pericarditis, to verify the effects on gene expression and inflammatory molecules.

Timeline

• Start date: 2024-08-18
• Primary completion: 2029-02-01
• Completion: 2031-02-01
• First posted: 2024-03-05
• Last updated: 2024-11-27

Locations

1 site across 1 country: Italy