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Related Experiment Video

Updated: Feb 7, 2026

A RAPID Method for Blood Processing to Increase the Yield of Plasma Peptide Levels in Human Blood
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Increased PKR level in human CADASIL brains.

Emmanuel Cognat1,2,3, Marion Tible1, Ilyes Methnani1

  • 1INSERM U942, Paris, France.

Virchows Archiv : an International Journal of Pathology
|August 4, 2018
PubMed
Summary
This summary is machine-generated.

Cerebral autosomal dominant arteriolopathy with subcortical infarcts and leucoencephalopathy (CADASIL) shows activated PKR pathway in neurons, but not altered autophagy. This finding offers new insights into neuronal apoptosis mechanisms in CADASIL.

Keywords:
AutophagyCADASILPKRSVDSmall vessel disease

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Area of Science:

  • Neuroscience
  • Genetics
  • Pathology

Background:

  • Cerebral autosomal dominant arteriolopathy with subcortical infarcts and leucoencephalopathy (CADASIL) is the most common hereditary small vessel disease (SVD) of the brain.
  • Neuronal apoptosis is a known feature in the cerebral cortex of CADASIL patients.

Purpose of the Study:

  • To investigate the potential role of the pro-apoptotic protein PKR pathway in CADASIL.
  • To explore the activation status of autophagy in CADASIL brains.
  • To elucidate the molecular mechanisms underlying cortical neuron apoptosis in CADASIL.

Main Methods:

  • Immunostaining was performed on brain samples from four CADASIL patients and five control individuals.
  • The expression of PKR (phosphoPKR) and autophagy markers (ATG5, LC3II) was analyzed.
  • Quantitative analysis compared marker expression between CADASIL and control groups.

Main Results:

  • Significant nuclear phosphoPKR staining was observed in neurons of CADASIL brains compared to controls (p=0.001).
  • No significant differences in autophagy markers (ATG5, LC3II) were detected between CADASIL patients and controls.
  • The pro-apoptotic PKR pathway is activated in CADASIL, independent of detectable autophagy modulation.

Conclusions:

  • The study demonstrates the activation of the PKR pathway in the cerebral cortex of CADASIL patients.
  • Autophagy does not appear to be significantly modulated in CADASIL, suggesting it is not a primary driver of neuronal apoptosis in this condition.
  • These findings open new avenues for understanding the mechanisms of neuronal apoptosis in CADASIL and may inform future therapeutic strategies.