Longitudinal assessment of the platelet transcriptome in advanced heart failure patients following mechanical unloading.

07:00 EST 14th January 2020 | BioPortfolio

Summary of "Longitudinal assessment of the platelet transcriptome in advanced heart failure patients following mechanical unloading."

Patients with heart failure (HF) and left ventricular assist devices (LVAD) have dysregulated thrombo-inflammatory responses, mediated in part by platelets. While studies of platelet activation have been undertaken in HF, changes in the platelet transcriptome in HF patients following mechanical unloading with an LVAD have not been investigated. We prospectively enrolled and longitudinally followed advanced HF patients (n = 32) for a mean of 57 months post-LVAD implantation. For comparison, healthy donors were also enrolled (n = 20). Platelets were hyperactive in HF, as evidenced by significantly increased formation of circulating platelet-monocyte aggregate formation. Platelet transcriptome interrogation by next-generation RNA-sequencing identified that the expression of numerous genes (n = 588) was significantly (FDR < 0.05) altered in HF patients prior to LVAD implantation. Differentially expressed genes were predicted to have roles in angiogenesis, immune and inflammatory responses, apoptosis, and cardiac muscle contraction. 90 days following LVAD implantation, the majority (80%) of differentially expressed genes in HF patients normalized, as compared to the platelet transcriptomes of healthy donors. In conclusion, advanced HF is associated with marked alterations in the platelet transcriptome. While LVAD implantation to off load the failing heart results in resolution in the majority of differentially expressed genes, a subset of the platelet transcriptome remains persistently altered.


Journal Details

This article was published in the following journal.

Name: Platelets
ISSN: 1369-1635
Pages: 1-8


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Medical and Biotech [MESH] Definitions

Enlargement of the HEART, usually indicated by a cardiothoracic ratio above 0.50. Heart enlargement may involve the right, the left, or both HEART VENTRICLES or HEART ATRIA. Cardiomegaly is a nonspecific symptom seen in patients with chronic systolic heart failure (HEART FAILURE) or several forms of CARDIOMYOPATHIES.

A heterogeneous condition in which the heart is unable to pump out sufficient blood to meet the metabolic need of the body. Heart failure can be caused by structural defects, functional abnormalities (VENTRICULAR DYSFUNCTION), or a sudden overload beyond its capacity. Chronic heart failure is more common than acute heart failure which results from sudden insult to cardiac function, such as MYOCARDIAL INFARCTION.

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