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Related Experiment Video

Updated: Nov 12, 2025

Spatial Profiling of Protein and RNA Expression in Tissue: An Approach to Fine-Tune Virtual Microdissection
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Profiling MicroRNAs with Associated Spatial Dynamics in Acute Tissue Slices.

Kai Xie1, Zixun Wang1, Lin Qi2

  • 1Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR China.

ACS Nano
|March 15, 2021
PubMed
Summary

New diamond nanoneedle technology profiles microRNAs (miRNAs) in tissues, revealing astrocyte dysregulation in a schizophrenia model. This method offers insights into disease mechanisms and cellular responses.

Keywords:
brain diseasecellular heterogeneitydiamond nanoneedlesin situ profilingmicroRNAspatial transcriptome

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Neuroscience

Background:

  • MicroRNAs (miRNAs) are crucial in disease pathogenesis but lack techniques for simultaneous expression and spatial profiling.
  • Understanding miRNA dynamics in different cell types is vital for disease research.

Purpose of the Study:

  • To develop a novel platform for multiplexed *in situ* miRNA profiling in acute tissue slices.
  • To enable quasi-single-cell analysis of miRNA expression and spatial dynamics within tissues.

Main Methods:

  • Utilized diamond nanoneedles functionalized with RNA-binding proteins for direct miRNA isolation from cellular cytosol.
  • Applied the platform to analyze miRNA expression and spatial distribution in a rat model of schizophrenia.

Main Results:

  • Demonstrated quantitative evaluation of miRNA expression levels and their relative spatial dynamics.
  • Identified heterogeneous effects on astrocytes, not neurons, in the hippocampus of MK-801-induced schizophrenia model rats.
  • Observed down-regulation of miRNA-135a and miRNA-143 in affected astrocytes, which were also more spatially dispersed.

Conclusions:

  • The developed platform provides a powerful tool for *in situ* miRNA profiling, offering insights into cellular heterogeneity and spatial organization.
  • Findings suggest astrocyte dysregulation, characterized by specific miRNA changes and altered spatial distribution, plays a role in schizophrenia pathogenesis.