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July 11, 2026HereditasOpen Access

Upregulated miR-146b-5p is linked to AMI and predicts poor prognosis.

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Why the study?

MiR-146b-5p has been implicated in multiple pathologies, but its role in acute myocardial infarction remained unexplored.

Population

103 AMI patients and 95 healthy controls

Comparison

AMI patients vs healthy controls

Design

Case-control and in vitro study

Key result

Upregulated miR-146b-5p expression was observed in 103 AMI patients compared to 95 healthy controls, demonstrating diagnostic value and predicting poor prognosis.

Authors

HWHailiang WuHZHui ZhangYHYuyan Hou

Discussion

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Overview

May aid AMI diagnosis if replicated; first human data extends miR-146b-5p observations to acute coronary syndromes.

Key Points

  • This study aims to investigate the role of miR-146b-5p in acute myocardial infarction and its implications for endothelial injury.
  • Analyzed serum from 103 AMI patients and 95 healthy controls using qRT-PCR for miR-146b-5p/PRKAR2A expression.
  • Conducted ROC curve analyses to evaluate diagnostic performance and correlation analyses with clinical markers.
  • Utilized in vitro models of ox-LDL-induced HCAEC injury with various assays to explore cellular mechanisms.
  • Upregulated miR-146b-5p in AMI patients correlated with hs-CRP, CK-MB, cTnI, LVEF, and Killip grade.
  • Higher miR-146b-5p was associated with a poor prognosis in AMI patients.
  • Inhibition of miR-146b-5p reduced apoptosis and inflammatory markers in ox-LDL-induced HCAECs, enhancing cell proliferation.

Study Design

Type

Case-Control (n=198)

Structured PICO

P
Population
198 participants, including 103 patients with acute myocardial infarction and 95 healthy controls, assessed for miR-146b-5p expression.
E
Exposure
Assessment of miR-146b-5p expression levels (clinical); miR-146b-5p inhibition (in vitro)
C
Comparator
Healthy controls (clinical); ox-LDL without inhibition (in vitro)
O
Outcome
Diagnostic performance, prognostic association, and cellular mechanisms of endothelial injury (apoptosis, inflammation, endothelial dysfunction)surrogate

miR-146b-5p is upregulated in AMI, correlates with disease severity and poor prognosis, and promotes endothelial injury by targeting PRKAR2A, suggesting it as a potential biomarker and therapeutic target.

Cite This Study

Wu et al. (2026) conducted a case-control in Acute myocardial infarction (n=198). miR-146b-5p expression vs. Healthy controls was evaluated on Diagnosis and prognosis of acute myocardial infarction. Upregulated miR-146b-5p expression was observed in 103 AMI patients compared to 95 healthy controls, demonstrating diagnostic value and predicting poor prognosis.

synapsesocial.com/papers/6a51deadc18d7f28ca5005f2https://doi.org/10.1186/s41065-026-00706-6
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