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Related Concept Videos

Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

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Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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Related Experiment Video

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Sighting acute myocardial infarction through platelet gene expression.

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  • 1Department of Medicine and Surgery, University of Parma, Parma, Italy.

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|December 22, 2019
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Summary

Platelet gene expression profiling identified five key genes that can detect ST-segment elevation myocardial infarction (STEMI) even before the event. This discovery offers early detection for acute myocardial infarction.

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Area of Science:

  • Cardiovascular Medicine
  • Molecular Biology
  • Genomics

Background:

  • Acute myocardial infarction (AMI) is often caused by atherosclerotic plaque rupture and thrombus formation.
  • Platelets are crucial in the development and progression of atherosclerosis and thrombosis.
  • Platelets, lacking a nucleus, retain mRNA from their precursors, making their gene expression a snapshot of pre-event cellular state.

Purpose of the Study:

  • To identify specific platelet gene expression profiles associated with ST-segment elevation myocardial infarction (STEMI).
  • To determine if these gene profiles can serve as early biomarkers for AMI.
  • To validate the diagnostic potential of identified genes in distinguishing STEMI patients from those with atherosclerosis alone.

Main Methods:

  • Gene-by-gene analysis of platelet mRNA expression in STEMI patients versus healthy donors.
  • Development of a logistic regression model combining differentially expressed genes to create a STEMI diagnostic score.
  • External validation of the identified gene signature using platelet gene expression data from patients with coronary atherosclerosis but no thrombosis.

Main Results:

  • Five differentially expressed genes (FKBP5, S100P, SAMSN1, CLEC4E, S100A12) were identified in platelets of STEMI patients.
  • A logistic regression model incorporating these five genes achieved an Area Under the Curve (AUC) of 0.95 for distinguishing STEMI from healthy controls.
  • The same five genes successfully validated the ability to identify STEMI patients against a background of coronary atherosclerosis.

Conclusions:

  • Platelet gene expression profiling can identify a specific signature of five genes capable of detecting STEMI.
  • This gene expression profile can differentiate STEMI patients from individuals with underlying atherosclerosis.
  • Early indicators of impending acute myocardial infarction may be detectable through platelet gene expression analysis prior to the event.