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Profiling the small non-coding RNA transcriptome of the human placenta.

Victor D Martinez1,2, David E Cohn3, Nikita Telkar1,4,5

  • 1British Columbia Cancer Research Centre, 675 West 10th Ave, Vancouver, BC, Canada.

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|July 3, 2021
PubMed
Summary
This summary is machine-generated.

This study characterizes small non-coding RNAs (sncRNAs) in the human placenta, identifying novel microRNAs (miRNAs) and variants. This provides a foundational understanding of sncRNA regulation in placental development and health.

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Area of Science:

  • Reproductive Biology
  • Genomics
  • Molecular Biology

Background:

  • Placental function is crucial for maternal and fetal well-being.
  • MicroRNAs (miRNAs) influence placental gene expression, but other small non-coding RNAs (sncRNAs) roles are less understood.
  • sncRNAs are increasingly studied for their role in environmental impacts on fetal development and reproductive health.

Purpose of the Study:

  • To delineate the human placental small non-coding RNA (sncRNA) transcriptome.
  • To characterize sncRNA expression patterns in term and preterm placental tissues.
  • To establish a baseline for investigating sncRNA regulatory functions and responses to environmental factors or disease.

Main Methods:

  • Small RNA sequencing analysis was performed on 30 human placental chorionic villi samples.
  • Samples represented a range of gestational ages (mean ± SD = 23.7 ± 11.3 weeks).
  • Bioinformatic analysis was used to identify and quantify sncRNAs and miRNA variants (isomiRs).

Main Results:

  • A total of 1544 sncRNAs were identified in the human placenta.
  • This included 48 microRNAs (miRNAs) not previously annotated in humans.
  • 18,003 miRNA variants (isomiRs) were detected across 654 observed miRNA species.

Conclusions:

  • This comprehensive characterization provides fundamental data on the human placental sncRNA transcriptome.
  • The findings offer a baseline expression profile for future studies on sncRNA regulatory roles.
  • This work supports investigations into how sncRNAs are affected by environmental exposures and disease states in pregnancy.