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Non-Protein-Coding RNA Instability in the Human Postmortem Brain.

Fabien Dachet¹, Jeffrey A Loeb¹

¹University of Illinois Chicago, Chicago, Illinois, USA.

Toxicologic Pathology

|November 30, 2025

Summary

This summary is machine-generated.

Long non-coding RNAs (lncRNAs) show variable stability in the human brain postmortem. Neuronal lncRNAs degrade quickly, while glial lncRNAs increase, impacting disease research.

Keywords:

brain non-coding RNA postmortem

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Area of Science:

Genomics
Neuroscience
Molecular Biology

Background:

The human genome contains numerous long non-coding RNA (lncRNA) genes with crucial regulatory roles.
lncRNAs are implicated in brain function and various neurological diseases.
Understanding RNA stability in postmortem brain tissue is vital for accurate research.

Purpose of the Study:

To investigate the stability of lncRNAs in a simulated human postmortem interval.
To determine cell-type specificity of lncRNA stability.
To compare lncRNA stability with protein-coding RNAs and microRNAs.

Main Methods:

Simulated postmortem interval experiment.
Analysis of lncRNA expression in different human brain cell types.
Comparative stability assessment of lncRNAs, protein-coding RNAs, and microRNAs.

Main Results:

lncRNA stability is variable and cell-type specific.
Some lncRNAs remain stable for up to 24 hours postmortem.
Neuronal lncRNAs rapidly decline, while glial lncRNAs (astrocytes, microglia) increase.
lncRNAs are less stable than protein-coding RNAs; microRNAs are highly unstable.

Conclusions:

lncRNA stability varies significantly by cell type in the postmortem human brain.
Rapid changes in lncRNA levels necessitate careful consideration in postmortem brain studies.
Accurate interpretation of RNA data in neurological disease research requires knowledge of postmortem stability profiles.