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Related Concept Videos

Ribosome Profiling02:24

Ribosome Profiling

Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...

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Decoding hippocampal subfield and glial responses in ischemia using single-cell transcriptomics.

Donghee Kwak1, Ji Hyun Park2, Yun Hak Kim3,4

  • 1Convergence Medical Sciences, Pusan National University, Yangsan, Republic of Korea.

Journal of Translational Medicine
|June 17, 2025
PubMed
Summary
This summary is machine-generated.

Stroke impacts brain regions differently. This study reveals unique glial and vascular cell responses in the hippocampus after ischemic stroke, offering new therapeutic targets for stroke recovery.

Keywords:
HippocampusIschemic strokeNeurogliaSingle-cell gene expression analysis

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Ischemic Stroke Research

Background:

  • Stroke affects millions globally, causing significant physical and cognitive deficits.
  • The brain's peri-infarct zone, including glial and vascular cells, influences stroke progression.
  • The hippocampus shows regional vulnerability, with CA1 being highly susceptible to ischemia.

Purpose of the Study:

  • To investigate cellular and molecular changes in hippocampal subregions post-ischemia.
  • To differentiate glial and vascular cell responses in CA1 versus CA3-DG regions after stroke.
  • To understand regional variations in the brain's response to global cerebral ischemia.

Main Methods:

  • Single-cell RNA sequencing was performed on Sprague-Dawley rats.
  • A four-vessel occlusion (4-VO) model induced transient global cerebral ischemia.
  • Hippocampal CA1 and CA3-DG regions were analyzed in ischemic and sham-operated rats.

Main Results:

  • Pro-inflammatory microglial subtypes increased post-stroke, with region-specific pathway alterations.
  • A novel oligodendrocyte subtype appeared in the ischemic hippocampus.
  • cd74-positive pericytes increased in the CA3-DG subfield following ischemia.

Conclusions:

  • Global cerebral ischemia induces diverse molecular signatures in hippocampal cells.
  • Glial heterogeneity contributes to regional differences in stroke vulnerability.
  • Findings offer insights into glial and vascular roles in stroke pathology and potential therapeutic strategies.