Reward-based hypertension control by a synthetic brain-dopamine interface

Area of Science:

• Synthetic biology
• Neuroscience
• Biomedical engineering

Background:

• Dopamine signaling in the brain regulates reward and behavior.
• Dopamine levels in plasma can correlate with brain activity.
• Synthetic biology offers tools to engineer cellular responses to biological signals.

Purpose of the Study:

• To design a synthetic dopamine-sensitive transcription controller.
• To link brain activity to peripheral therapeutic gene expression.
• To investigate the potential for subconscious behavioral control of physiological responses.

Main Methods:

• Rewiring the human dopamine receptor D1 (DRD1) using cyclic adenosine monophosphate (cAMP) pathways.
• Utilizing synthetic promoters with cAMP-responsive operator modules.
• Implanting circuit-transgenic human cell lines in immunoprotective microcontainers into mice.

Main Results:

• The synthetic controller demonstrated reversible gene expression fine-tuning at physiologically relevant dopamine levels.
• Implanted devices responded to reward system stimulation (food, arousal, drugs) in mice.
• Reward-triggered brain activity remotely programmed implants to produce atrial natriuretic peptide, normalizing blood pressure in hypertensive mice.

Conclusions:

• A synthetic dopamine-sensitive transcription controller was successfully developed and tested.
• This technology enables remote, behavior-driven programming of therapeutic implants.
• This approach holds promise for future therapeutic strategies by linking subconscious behavior to physiological regulation.