What type of study is this?

This is a Animal Study study (also classified as: Validation Study).

What question did this study set out to answer?

The aim is to understand how microRNAs regulate pathways leading to early-onset cardiac hypertrophy in neonatal HHRs.

January 9, 2026PLoS ONEOpen Access

MicroRNA mediated regulation in early-onset cardiac hypertrophy: Insights from the hypertrophic heart rat model

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Key result

Neonatal Hypertrophic Heart Rats exhibited a significantly increased cardiac weight index compared to Normal Heart Rats, indicating early-onset cardiac hypertrophy.

Authors

SSShahzad SadiqDeakin University FCFadi J. CharcharFederation University ASAndrew SanigorskiDeakin University

Discussion

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Implication

Characterizes microRNA involvement in early-onset cardiac hypertrophy, suggesting implications for treatment.

Key Points

The aim is to understand how microRNAs regulate pathways leading to early-onset cardiac hypertrophy in neonatal HHRs.
Utilized the Hypertrophic Heart Rat model to study early cardiac hypertrophy
Performed microarray profiling to identify differentially expressed miRNAs and mRNAs
Conducted Gene Set Enrichment Analysis (GSEA) to find biological pathways
Validated findings using quantitative reverse transcription PCR (RT-qPCR)
Neonatal HHRs showed significantly elevated cardiac weight index compared to Normal Heart Rats
Identified 107 differentially expressed miRNAs, with key ones being miR-34a, miR-351, and miR-490*
Upregulation of hypertrophic markers such as NPPA, NPPB, and MAPK1
miR-34a was validated to target HTR2A, indicating involvement of serotonin signalling
Elevated SGPP1 expression suggests increased sphingolipid metabolism

Cite This Study

Sadiq et al. (2025) studied this question. Neonatal Hypertrophic Heart Rats exhibited a significantly increased cardiac weight index compared to Normal Heart Rats, indicating early-onset cardiac hypertrophy.

synapsesocial.com/papers/69612fdc30ef6c21f6853dff https://doi.org/10.1371/journal.pone.0338909

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