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Related Experiment Video

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Induction and Micro-CT Imaging of Cerebral Cavernous Malformations in Mouse Model
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Mapping cell diversity in human sporadic cerebral cavernous malformations.

Xiaocan Hou1, Feng Liang2, Jiaoxing Li3

  • 1Department of Rehabilitation Medicine, The First Affiliated Hospital, Sun Yat-sen University, No.58 Zhongshan Road 2, Guangzhou, 510080, China.

Gene
|May 24, 2024
PubMed
Summary

Researchers identified several genes, including PVT1, that are significantly upregulated in sporadic cerebral cavernous malformation (SCCM) tissues. These findings offer new insights into the genetic mechanisms underlying SCCM development and progression.

Keywords:
CCMEndothelial cellsPVT1Single cell RNA sequencingSmooth muscle cells

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Area of Science:

  • Vascular Biology
  • Genomics
  • Cell Biology

Background:

  • Cerebral cavernous malformation (CCM) is a vascular disease associated with hemorrhage, seizures, and neurological deficits.
  • Both sporadic (SCCM) and familial forms exist, with SCCM characterized by single lesions.
  • The underlying genetic causes and pathological mechanisms of SCCM remain incompletely understood.

Purpose of the Study:

  • To investigate the molecular mechanisms and identify candidate genes involved in sporadic cerebral cavernous malformation (SCCM).
  • To provide a comprehensive molecular atlas and evidence for the SCCM generative process using advanced sequencing techniques.

Main Methods:

  • Single-cell RNA sequencing (scRNA-Seq) and bulk assay for transposase-accessible chromatin sequencing (ATAC-Seq) were performed on SCCM and control patient samples.
  • Gene expression was validated using quantitative polymerase chain reaction (qPCR) and RNA in situ hybridization (RNA FISH).

Main Results:

  • Six distinct cell types were identified in both SCCM and control vessels.
  • The expression of NEK1, RNPC3, FBRSL1, IQGAP2, MCUB, AP3B1, ESCO1, MYO9B, and PVT1 was found to be upregulated in SCCM tissues.
  • PVT1 expression showed a distinct pattern, with a rising peak in endothelial cells and an increasing trend in smooth muscle cells during SCCM development.

Conclusions:

  • PVT1 plays a significant role in the development of SCCM, exhibiting altered expression dynamics in endothelial and smooth muscle cells.
  • The study identified multiple upregulated genes (NEK1, RNPC3, FBRSL1, IQGAP2, MCUB, AP3B1, ESCO1, MYO9B, PVT1) in SCCM specimens, advancing our understanding of the disease's molecular pathology.