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Related Experiment Video

Updated: Oct 13, 2025

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Genetic-code-expanded cell-based therapy for treating diabetes in mice.

Chao Chen1, Guiling Yu2, Yujia Huang1

  • 1State Key Laboratory of Natural and Biomimetic Drugs, Department of Molecular and Cellular Pharmacology, School of Pharmaceutical Sciences, Peking University, Beijing, China.

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|November 16, 2021
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Summary
This summary is machine-generated.

A novel noncanonical amino acids (ncAAs)-triggered therapeutic switch (NATS) system enables rapid, translation-level protein expression for cell-based therapies. This breakthrough offers faster therapeutic responses compared to traditional methods.

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Area of Science:

  • Biotechnology
  • Synthetic Biology
  • Genetic Engineering

Background:

  • Inducer-triggered therapeutic protein expression from designer cells shows promise for disease treatment.
  • Current systems relying on transcriptional control have slow protein expression kinetics, limiting therapeutic applications.
  • There is a need for rapid, controllable therapeutic protein production systems.

Purpose of the Study:

  • To engineer a genetic code expansion-based system for fast therapeutic protein expression.
  • To develop a noncanonical amino acids (ncAAs)-triggered therapeutic switch (NATS) system.
  • To demonstrate the potential of NATS for next-generation cell-based therapies.

Main Methods:

  • Engineered a genetic code expansion-based system (NATS) for translational control of protein expression.
  • Utilized cognate noncanonical amino acids (ncAAs) to trigger therapeutic protein production.
  • Tested NATS system responsiveness and compatibility with transcriptional switches.
  • Evaluated NATS system efficacy in diabetic mouse models with microencapsulated cell implants.

Main Results:

  • The NATS system demonstrated therapeutic protein expression response within 2 hours.
  • Transcription-machinery-based systems showed no detectable signal within the same timeframe.
  • NATS system is compatible with transcriptional switches for multi-regulatory control.
  • Oral delivery of ncAA to diabetic mice with NATS cell implants alleviated hyperglycemia within 90 minutes.
  • ncAA-containing 'cookies' achieved long-term glycemic control in diabetic mice.

Conclusions:

  • The NATS system provides a rapid, translation-level control mechanism for therapeutic protein expression.
  • NATS offers a significant advancement over transcription-based systems for therapeutic applications requiring fast response times.
  • This proof-of-concept study highlights the potential of NATS for designing next-generation, orally inducible cell-based therapies.