In a recent article published in the journal iScience, researchers at UCLA have found that cells can repair themselves in seconds after being gently squeezed to let in genetic material. This researchcould help make future gene therapies safer, more efficient, and more economical.
The Challenge
To treat certain diseases, scientists often need to get DNA or other molecules inside cells. The cell membrane acts like a protective skin, preventing doctors from injecting the necessary medicines, so researchers create tiny openings to slip the material through. The most common method uses electric pulses, called electroporation, but this can stress cells, change their behaviour, and even cause cell death.
The UCLA team tested a different approach called filtroporation. Instead of electricity, cells are pushed through a filter with microscopic holes. This brief squeeze opens the membrane just long enough for molecules like CRISPR gene-editing tools to enter.
The researchers discovered that cells start repairing these openings almost immediately. In fact, the pores close within about 30 seconds. That means timing is critical: the genetic material must be mixed with the cells before they pass through the filter, or it won’t get inside.
Calcium, an important mineral already present in our bodies, turned out to be vital for this repair process. When extra calcium was added, cells sealed up even faster, reducing delivery efficiency. Without calcium, cells struggled to survive. This shows that the repair relies on calcium-driven signals inside the cell, with the “Goldilocks” amount of calcium being a critical factor in achieving the best results.
The study also used fluorescent tags to monitor the repair process and revealed that cells use several different repair strategies at once, including patching holes with tiny internal bubbles and reshaping the membrane. Special proteins act like emergency crews, rushing to the damaged spots within seconds.
The Role of Henniker's HPT-200 Plasma Cleaner
One clever detail made filtroporation possible: the filters themselves had to be treated so that cells wouldn’t stick to them. The team used a process called plasma treatment, using the Henniker Plasma HPT-200 system. The HPT-200 modifies the filter surface, introducing polar functional groups, changing the surface chemistry so that it can accept a water-repellent coating. That coating stops cells from clumping and ensures they slide smoothly through the pores. Without this step, cells would become trapped in the pores of the filter, leading to blockages and ultimately cell death.
Conclusion
Filtroporation is simple, inexpensive and uses off-the-shelf parts, making it attractive for labs and potentially for clinical applications. It also causes fewer genetic side effects than electroporation, which often triggers unwanted changes in stem cells. By uncovering how quickly cells heal and what helps them survive, this work could improve gene therapy and deepen our understanding of how living cells cope with physical stress. It’s a reminder that even at the microscopic level, life is remarkably resilient.
Keywords
- Filtroporation
- HPT-200
- Gene therapy delivery
References
Readers are referred to the original print, available through the provided DOI link, or click the link below for further details on the Henniker Plasma HPT-200.
Isaura M. Frost, Ruby Sims, Anya Yakimenko, Rachel Ma, Maximiliam Floridia, Ruth A. Foley, Emily C. Duggan, Kelly Y. Cai, Kelsey Jorgensen, Emily Skuratovsky, Paul S. Weiss, Steven J. Jonas
DOI: https://doi.org/10.1016/j.isci.2025.114317
[1] The HPT-200 ModelFAQ's
Q: What is filtroporation?
A: Filtroporation pushes cells through a filter with microscopic pores, allowing genetic material to enter while minimising stress compared with electroporation.
Q: Why use plasma treatment needed?
A: The HPT-200 modifies filter surfaxeas so cells do not stick to them, enxuring smooth oassage and preventing blockages during filtroporation.
Q: How quickly do cells repair after filtroporation?
A: Cells reseal membrane openings in roughly 30 seconds, using multiple repair pathways activated by calcium-dependent signalling.
Q: Why does this matter for gene therapy?
A: Filtroporation offers lower toxicity, fewer genetic side effects and reduced cost, making it a promising route for safer clinical delivery.
