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Updated: Oct 24, 2025
Tissue-specific miRNA Expression Profiling in Mouse Heart Sections Using In Situ Hybridization
Published on: September 15, 2018
miRNA expression analysis in the human heart: Undifferentiated progenitors vs. bioptic tissues-Implications for
Gioacchin Iannolo1, Maria Rita Sciuto2, Nicola Cuscino1
1Department of Research, Istituto Mediterraneo per i Trapianti e Terapie ad alta specializzazione (ISMETT-IRCCS), Palermo, Italy.
Insights
Cardiospheres (CSs) and cardiosphere-derived cells (CDCs) show potential for heart repair after myocardial infarction (MI). MicroRNA (miRNA) profiling revealed key differences in their expression, impacting cell proliferation and differentiation.
Area of Science:
- Cardiology
- Molecular Biology
- Regenerative Medicine
Background:
- Cardiovascular diseases are the leading cause of death globally.
- Cardiospheres (CSs) and cardiosphere-derived cells (CDCs) show promise in myocardial regeneration post-myocardial infarction (MI).
- MicroRNAs (miRNAs) are increasingly recognized for their role in cardiac repair mechanisms.
Purpose of the Study:
- To investigate the involvement of miRNAs in human heart repair.
- To compare miRNA expression profiles in human heart biopsies, CSs, and CDCs.
Main Methods:
- Microarray analysis
- Next-generation sequencing (NGS) of miRNA expression
- Comparison of miRNA profiles across different cardiac cell types and tissues.
Main Results:
- Identified specific miRNAs upregulated in CSs/CDCs, potentially regulating proliferation and undifferentiation.
- Found miRNAs downregulated in CSs/CDCs compared to heart biopsies.
- Observed correlations between miRNA expression levels and patient age (e.g., miR-490 downregulation) and inverse correlations for upregulated miRNAs (e.g., miR-31).
Conclusions:
- miRNA expression profiles differ significantly between cardiac progenitor cells and native heart tissue.
- Specific miRNAs may be crucial for the regenerative capacity of CSs/CDCs.
- Age-related changes in miRNA expression could influence the efficacy of cell-based cardiac therapies.
Abstract:
In developed countries, cardiovascular diseases are currently the first cause of death. Cardiospheres (CSs) and cardiosphere-derived cells (CDCs) have been found to have the ability to regenerate the myocardium after myocardial infarction (MI). In recent years, much effort has been made to gain insight into the human heart repair mechanisms, in which miRNAs have been shown to play an important role. In this regard, to elucidate the involvement of miRNAs, we evaluated the miRNA expression profile across human heart biopsy, CSs and CDCs using microarray and next-generation sequencing (NGS) technologies. We identified several miRNAs more represented in the progenitors, where some of them can be responsible for the proliferation or the maintenance of an undifferentiated state, while others have been found to be downregulated in the undifferentiated progenitors compared with the biopsies. Moreover, we also found a correlation between downregulated miRNAs in CSs/CDCs and patient age (eg miR-490) and an inverse correlation among miRNAs upregulated in CSs/CDCs (eg miR-31).
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