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Updated: May 13, 2026
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Non-invasive Strategies for Chronic Manipulation of DREADD-controlled Neuronal Activity
Published on: August 25, 2019
Bidirectional Brain-Machine Communication and Neuromodulation by Supramolecular Hydrogel Neural Probes for Chronic
Yanxia Qin1,2, Minfei Dang1,2, Dehai Yu3
1State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|May 12, 2026
Summary
A new hydrogel brain-machine interface (BMI) offers stable, long-term neural recording and modulation for chronic pain. This advanced neural interface technology shows promise for improved therapeutic outcomes in neuropathic pain models.
Area of Science:
- Biomaterials Science
- Neuroscience
- Medical Devices
Background:
- Chronic pain presents a significant therapeutic challenge due to complex pathophysiology and limited conventional treatment efficacy.
- Rigid implantable brain-machine interfaces (BMIs) face challenges with mechanical mismatch to brain tissue, leading to inflammation and signal degradation.
- Existing probes often lack integrated capabilities for simultaneous neural recording and in situ neuromodulation.
Purpose of the Study:
- To develop a novel supramolecular hydrogel-based brain-machine interface (BMI) with enhanced mechanical compliance, conductivity, and optical transparency.
- To evaluate the long-term performance of the hydrogel probe for neural recording and in situ neuromodulation in a chronic neuropathic pain model.
- To investigate the therapeutic potential of integrated neural recording and modulation for chronic pain management.
Main Methods:
- Fabrication of a supramolecular hydrogel using α-helical polypeptide cross-linkers.
- Implantation of the hydrogel probe in the rat prelimbic cortex for chronic local field potential (LFP) recording.
- Concurrent in situ neuromodulation and evoked LFP recording in a chronic neuropathic pain model.
Main Results:
- The hydrogel probe demonstrated stable LFP recording for up to 16 weeks post-implantation.
- Integrated neuromodulation via the hydrogel probe enhanced prelimbic cortical activity.
- Treatment resulted in increased mechanical withdrawal thresholds and reduced cold allodynia in the pain model.
Conclusions:
- The developed hydrogel-based BMI overcomes limitations of rigid probes, offering long-term stability and integrated functionality.
- This technology enables simultaneous neural monitoring and neuromodulation, advancing neural interface design for chronic pain therapy.
- The findings represent a paradigm shift in implantable devices for effective chronic pain management.
