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Updated: May 5, 2026

Single Cell Transcriptional Profiling of Adult Mouse Cardiomyocytes
08:23

Single Cell Transcriptional Profiling of Adult Mouse Cardiomyocytes

Published on: December 28, 2011

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RNA sequencing of formalin fixed paraffin-embedded heart tissue provides transcriptomic information about

Valentina K Todorova1, Michael A Bauer2, Gohar Azhar3

  • 1Division of Hematology/Oncology, University of Arkansas for Medical Sciences, Little Rock, AR, USA; Department of Geriatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA.

Pathology, Research and Practice
|April 28, 2024
PubMed

Insights

Gene expression analysis of archival formalin-fixed paraffin-embedded (FFPE) heart tissue using RNA sequencing can reveal mechanisms of doxorubicin (DOX)-induced cardiotoxicity. This approach supports using FFPE tissues for retrospective cardiovascular disease studies.

Area of Science:

  • Biomedical research
  • Molecular biology
  • Cardiovascular science

Background:

  • Chemotherapeutics like doxorubicin (DOX) can cause cardiotoxicity, but underlying mechanisms require further elucidation.
  • Formalin-fixed paraffin-embedded (FFPE) tissues are valuable archival resources for molecular studies.
  • Investigating gene expression in FFPE tissues offers potential for retrospective analysis of cardiovascular diseases.

Purpose of the Study:

  • To assess the feasibility of using RNA sequencing on archival FFPE rat heart tissue to study doxorubicin (DOX)-induced cardiotoxicity.
  • To correlate gene expression profiles from FFPE heart tissue with those from fresh-frozen heart tissue.
  • To identify molecular pathways involved in DOX-induced cardiotoxicity using FFPE samples.

Main Methods:

  • RNA sequencing was applied to archival FFPE rat heart tissue and fresh-frozen heart tissue.
  • Differential gene expression analysis was performed to identify genes affected by doxorubicin (DOX) treatment.
  • Bioinformatic analysis was used to explore molecular mechanisms related to DOX-induced cardiotoxicity.

Main Results:

  • RNA extracted from FFPE samples showed degradation, leading to fewer uniquely mapped reads compared to fresh-frozen tissue.
  • Despite RNA degradation, differentially expressed genes in FFPE samples reflected key mechanisms of DOX-induced cardiotoxicity, including inflammation, calcium binding, endothelial dysfunction, senescence, and cardiac hypertrophy signaling.
  • Gene expression patterns in FFPE tissue correlated with known molecular pathways of doxorubicin (DOX) cardiotoxicity.

Conclusions:

  • RNA sequencing of archival FFPE heart tissue is a viable method for investigating molecular mechanisms of drug-induced cardiotoxicity, such as that caused by doxorubicin (DOX).
  • FFPE tissues can be effectively utilized in retrospective studies for cardiovascular disorders, offering insights into disease mechanisms and treatment side effects.
  • This study validates the use of FFPE samples for uncovering molecular details of cardiovascular conditions and drug toxicities.
Keywords:
CardiotoxicityDoxorubicinFFPEGene expressionRNA sequencing

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