Free plasma DNA in patients with pulmonary embolism

Area of Science:

• Biochemistry
• Medical Diagnostics
• Immunology

Background:

• Pulmonary embolism (PE) diagnosis can be challenging.
• Current diagnostic methods may have limitations.
• Systemic lupus erythematosus (SLE) patients often have anti-DNA antibodies.

Purpose of the Study:

• To investigate the presence of free DNA in plasma of patients with suspected pulmonary embolism (PE) and acute myocardial infarction (AMI).
• To evaluate counterimmunoelectrophoresis (CIE) as a rapid screening method for PE.

Main Methods:

• Plasma samples from 46 patients with suspected PE and 25 with suspected AMI were analyzed for DNA using CIE.
• Anti-DNA serum from an SLE patient was used for detection.
• Lung scan results were used to categorize PE probability.

Main Results:

• Free DNA was detected in 88% of patients with high-probability PE and 29% with low-probability PE.
• Only one patient with myocardial infarction and none with normal scans had detectable plasma DNA.
• CIE proved to be a rapid and simple detection method.

Conclusions:

• Plasma DNA detection by CIE is a potentially valuable tool for screening suspected pulmonary embolism.
• This method shows higher sensitivity in patients with a high probability of PE.
• Further research may validate CIE as a primary screening tool for PE.