Harnessing Cellular Feeling: Epigenetic to Mechanical Memory as a Framework for Stem Cell Manufacturing.

Area of Science:

• Regenerative Medicine
• Cellular Biology
• Manufacturing Science

Background:

• Stem cell therapies offer great promise but face manufacturing and clinical variability challenges.
• Current Quality by Design (QbD) frameworks are insufficient for dynamic living cell products.
• Cellular responses to environmental factors introduce complexity in cell product quality.

Purpose of the Study:

• To introduce a novel interpretive lens for understanding cellular variability in manufacturing.
• To propose a new paradigm, fluctuation-aware Quality by Design (QbD), for living medicines.
• To reframe cellular variability not as noise but as a harnessable property.

Main Methods:

• Utilizing "kimochi" (cellular feeling) as a metaphor for cellular environmental sensing and memory inscription.
• Framing cellular variability through measurable memory dynamics and epigenetic plasticity.
• Developing a fluctuation-aware QbD framework with standardized memory metrics, multiscale modeling, and adaptive process control.

Main Results:

• Cellular "feeling" reflects the integration of biochemical and mechanical inputs into cellular memory.
• Ex vivo culture transitions cells from epigenetic plasticity to mechanically stabilized states.
• The proposed QbD framework enables harnessing fluctuation for reproducible and scalable living medicines.

Conclusions:

• A new framework, fluctuation-aware QbD, is proposed for living medicines.
• This approach leverages cellular "feeling" and memory dynamics to manage variability.
• The goal is to achieve reproducible, scalable, and clinically reliable living therapies.