A tunable synthetic mammalian oscillator

Area of Science:

• Synthetic biology
• Systems biology
• Molecular biology

Background:

• Circadian clocks are essential biological timekeepers regulating critical cellular processes.
• The molecular mechanisms of mammalian circadian clocks are not fully understood.
• Oscillator circuits are minimal genetic devices central to circadian rhythms.

Purpose of the Study:

• To design and construct a synthetic mammalian oscillator for tunable gene expression.
• To investigate the dynamics of artificial circadian clocks in living cells.
• To explore potential applications in gene and cell therapies.

Main Methods:

• Development of a synthetic oscillator using a sense-antisense transcription control circuit.
• Incorporation of positive and time-delayed negative feedback loops.
• Real-time monitoring of gene expression dynamics using time-lapse microscopy and mathematical modeling.

Main Results:

• Demonstrated autonomous, self-sustained, and tunable oscillatory gene expression.
• Successfully engineered a synthetic mammalian clock in Chinese hamster ovary cells.
• Observed tunable frequency and amplitude of green fluorescent protein oscillations.

Conclusions:

• The synthetic mammalian oscillator provides a platform for studying circadian dynamics.
• This artificial clock offers insights into natural periodic biological processes.
• Potential applications in developing prosthetic networks for future gene and cell therapies.