Differential expression of novel MicroRNAs from developing fetal heart of Gallus gallus domesticus implies a role in cardiac development

Abstract

Heart development is a complex process regulated by multi-layered genetic as well epigenetic regulators many of which are still unknown. Besides their critical role during cardiac development, these molecular regulators emerge as key modulators of cardiovascular pathologies, where fetal cardiac genes’ re-expression is witnessed. MicroRNAs have recently emerged as a crucial part of signalling cascade in both development and diseases. We aimed to identify, validate, and perform functional annotation of putative novel miRNAs using chicken as a cardiac development model system. Novel miRNAs were obtained through deep sequencing of small RNAs extracted from chicken embryonic cardiac tissue of different developmental stages. After filtering out real pre-miRNAs, their expression analysis, potential target gene’s prediction and functional annotations were performed. Expression analysis revealed that miRNAs were differentially expressed during different developmental stages of chicken heart. The expression of selected putative novel miRNAs was further validated by real-time PCR. Our analysis indicated the presence of novel cardiac miRNAs that might be regulating critical cardiac development events such as cardiac cell growth, differentiation, cardiac action potential generation and signal transduction.

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Acknowledgements

This study was supported by DST-SERB, Government of India (File No: EMR/2016/005914); and CSIR, Government of India (File No: 09/1132 (0004)/18-EMR-I).

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Correspondence to Vibha Rani.

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11010_2019_3618_MOESM1_ESM.tif

Supplementary material 1—Flowchart depicting the steps taken for identification and validation of novel miRNAs and generation of interaction network between enriched GO terms and KEEG pathways. (TIFF 148 kb)

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Saxena, S., Mathur, P., Shukla, V. et al. Differential expression of novel MicroRNAs from developing fetal heart of Gallus gallus domesticus implies a role in cardiac development. Mol Cell Biochem 462, 157–165 (2019). https://doi.org/10.1007/s11010-019-03618-4

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Keywords

  • Fetal
  • Cardiac
  • Development
  • Novel miRNAs
  • Cardiovascular diseases
  • Gene re-expression