Related Experiment Video
Updated: Jun 23, 2026
10:27
Spatio-Temporal Manipulation of Small GTPase Activity at Subcellular Level and on Timescale of Seconds in Living Cells
Published on: March 9, 2012
Receptor-Tethered Cytosolic Modulators Enable Spatial Control of Cell Signaling Specificity
Pantong Hu1, Zhimin Wang1, Limei Wu1
1Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo and Biosensing, College of Chemistry and Chemical Engineering, College of Biology, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha, Hunan 410082, China.
ACS Nano
|June 22, 2026
Summary
Researchers developed a novel nanoplatform to control cellular signaling. This tool precisely manipulates effector protein activity near membrane receptors, enabling new insights into immune cell regulation and potential therapies.
Area of Science:
- Cellular Biology
- Immunology
- Biotechnology
Background:
- Cellular signaling specificity relies on spatial regulation of effector proteins.
- Membrane receptors initiate signaling cascades by recruiting cytosolic effectors.
- Understanding localized effector activity is crucial for cellular function.
Purpose of the Study:
- To engineer a tool for precise spatial manipulation of cytosolic effector activity.
- To investigate the role of localized effector activity in immune cell signaling.
- To establish a nanoplatform for dissecting signaling networks.
Main Methods:
- Engineered receptor-tethered cytosolic modulators with three distinct modules.
- Utilized modulators to locally inhibit Src family kinases (SFKs) near PD1 and T-cell receptor/CD3.
- Assessed the impact of localized inhibition on receptor phosphorylation and T-cell activity.
Main Results:
- Local inhibition of SFKs near PD1 suppressed PD1 phosphorylation and restored T-cell activity.
- Inhibition of SFKs near the T-cell receptor/CD3 complex impaired T-cell activation.
- Demonstrated the ability to spatially control effector activity with high precision.
Conclusions:
- Developed a versatile and modular nanoplatform for dissecting signaling networks.
- Spatial control of effector activity is critical for precise signaling outcomes.
- The nanoplatform offers opportunities for targeted bioregulation and therapeutic interventions.
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