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Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
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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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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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Related Experiment Video

Updated: Aug 5, 2025

Dynamic Monitoring of Seroconversion using a Multianalyte Immunobead Assay for Covid-19
08:48

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Biomarker Profiles Associated with COVID-19 Severity and Mortality.

Silvia Sánchez-Díez1,2, Carlos Gómez-Ollés1, María-Jesús Cruz1,2

  • 1Pulmonology Service, Department of Medicine, Vall d'Hebron University Hospital, Autonomous University of Barcelona, 08035 Barcelona, Spain.

Current Issues in Molecular Biology
|March 28, 2023
PubMed
Summary
This summary is machine-generated.

Biomarkers like YKL-40 and KL-6 predict mortality in COVID-19 patients. Different cytokine profiles indicate severity, with Th2 cytokines linked to ICU admission and innate immune responses to ward admission.

Keywords:
COVID-19cytokineslung fibrosisserum

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Area of Science:

  • Immunology
  • Pulmonology
  • Infectious Diseases

Background:

  • Understanding SARS-CoV-2 infection severity and progression is crucial.
  • Identifying predictive biomarkers aids in patient management and prognosis.

Purpose of the Study:

  • To analyze biomarkers for predicting SARS-CoV-2 infection severity and progression.
  • To differentiate immune responses between ward and ICU admitted patients.

Main Methods:

  • Inclusion of unvaccinated COVID-19 patients admitted to ward or ICU.
  • Collection of clinical data, blood samples, lung function tests, and CT scans at multiple time points.
  • Measurement of various cytokines and lung fibrosis biomarkers (YKL-40, KL-6).

Main Results:

  • Higher IL-4, IL-5, IL-6 in ICU patients; higher IL-17, IL-8 in ward patients.
  • Elevated YKL-40 and KL-6 levels in non-survivors.
  • Negative correlation between YKL-40, KL-6 and lung function (FVC, FEV1, DLCO) post-discharge.

Conclusions:

  • Distinct cytokine profiles (Th2 vs. innate/Th1/Th17) correlate with COVID-19 severity.
  • YKL-40 and KL-6 are associated with COVID-19 mortality and impaired lung function recovery.