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Related Experiment Video

Updated: May 31, 2026

Techniques to Induce and Quantify Cellular Senescence

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

Decoding the Spatiotemporal Logic of Cellular Senescence through Multimodal Exosomal miRNA Integration.

Haonan Chang¹, Yunfeng Feng², Bing Zhang¹

¹Medical Science and Technology Innovation Center, Shandong First Medical University, Jinan 250117, China.

|May 29, 2026

Summary

This summary is machine-generated.

This study introduces a novel biosensing platform for monitoring exosomal RNAs without cell lysis. The system precisely maps RNA dynamics in aging and Alzheimer

Keywords:

RNA dynamic map cellular senescence exosomal RNAs multimodal biosensing rolling circle amplification (RCA)situ monitoring

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Area of Science:

Biomedical Engineering
Molecular Biology
Gerontology

Background:

Exosomal RNAs are crucial biomarkers for cellular communication and disease progression.
Current methods for exosomal RNA analysis often require cell lysis, limiting in situ monitoring.
Understanding dynamic RNA changes in aging and neurodegenerative diseases like Alzheimer's is critical.

Purpose of the Study:

To develop a multimodal biosensing platform for in situ, label-free monitoring of exosomal RNAs.
To create a comprehensive RNA dynamic map during oxidative stress-induced cellular senescence.
To validate the platform for staging Alzheimer's disease (AD) and identifying diagnostic biomarkers.

Main Methods:

A cascade biosensing system integrating aptamer recognition, rolling circle amplification (RCA), and G-quadruplex/hemin signal transduction.
Electrochemical and colorimetric signal integration using an inverse-variance-weighted data fusion algorithm.
Application to oxidative stress models and clinical samples from Alzheimer's disease patients.

Main Results:

Ultrasensitive and precise detection of exosomal RNAs without cell lysis.
Construction of a time-resolved RNA dynamic map during cellular senescence, revealing distinct miRNA roles (miRNA-21, miRNA-29c, miRNA-34a).
Successful staging of Alzheimer's disease (mild cognitive impairment vs. progressive AD) and identification of exosomal miRNA-21 and miRNA-34a as independent risk factors.

Conclusions:

The developed amplified, multimodal biosensing framework enables robust profiling of exosomal RNA communication.
This platform offers a powerful tool for stage-resolved biomolecular mapping in precision geroscience and diagnostics.
Exosomal miRNA signatures provide a robust molecular basis for precision diagnostics in aging and Alzheimer's disease.