They found that adding extra DNA Trick Cells Into Making More Protein actually boosts gene expression.
Scientists Trick Cells Into Making More Protein!
What Just Happened in a Lab in Taiwan?
At first, it sounds like a neat lab trick. Scientists at Tzu Chi University in Taiwan discovered something surprising. They found that adding extra DNA Trick Cells Into Making More Protein actually boosts gene expression. In other words, cells make more of a target protein when you sneak in extra plasmid DNA alongside the main instructions.
The study was published in March 2026 in the open-access journal BioTech (Lo et al., 2026). It focuses on transient transfection — a lab technique used all over the world. So far, this technique has been a cornerstone of biotechnology and medical research.
What is Transfection, Anyway?
To explain, think of a cell as a tiny factory. The factory follows instructions written in DNA. Scientists can slip in extra instructions using small circular pieces of DNA called plasmids. After that, the cell reads those instructions and makes a protein. This process is called transfection.
Seeing that proteins are used to make medicines like monoclonal antibodies, getting cells to produce more protein is extremely valuable. To illustrate, many cancer treatments and autoimmune drugs are actually purified proteins grown in lab cells. What’s more, Chinese hamster ovary (CHO) cells are the most popular “factories” for this purpose.
The Surprising Discovery
Prior to this study, scientists assumed that adding extra plasmid DNA would not do much. All of a sudden, the Tzu Chi team found the opposite. When they added “empty” plasmid DNA alongside a reporter gene, the reporter gene’s activity jumped significantly.
To enumerate the key findings: co-transfected plasmids boosted transient gene expression across multiple cell types; the effect worked with many different promoters and reporter sequences; the enhancement happened at the level of transcription; and the effect did not work when the gene was stably integrated into the chromosome.
Why Does this Happen? Blame Histones.
To put it differently, think of histones as bouncers at a club. They wrap around DNA and keep genes from being read too easily. When you flood the cell with extra plasmid DNA, the histones get busy dealing with all that new DNA. As a result, they loosen their grip on the reporter gene — and that gene gets expressed more freely.
The researchers tested this idea using a drug called Pracinostat (SB939). This drug blocks histone deacetylase (HDAC). Provided that the drug was added to the cells, reporter gene expression increased in a dose-dependent way.
What about the Immune System?
While it may be true that foreign DNA can trigger immune responses, the team checked for this carefully. They confirmed that the plasmids did not activate interferon — the cell’s alarm signal. To point out another key finding, the enhancement only appeared inside the same cell. It did not spread to neighboring cells.
Why Does this Matter for Biotechnology?
At the present time, biotechnology companies spend enormous resources trying to boost recombinant protein production. As a matter of fact, the findings from this study offer a simple and affordable approach. By co-transfecting cells with extra plasmid DNA, labs can increase yield without expensive equipment or complex cell engineering.
Career Opportunities in this Field
So long as you are curious about science, this field has a lot to offer. In fact, biotechnology and molecular biology are among the fastest-growing career areas in the world today.
What Careers Are Available?
You could become a molecular biologist, a bioprocess engineer, a pharmaceutical researcher, or a genetic engineer. What’s more, many universities now offer dedicated biotechnology programs. You can also explore related topics on entechonline.com science and technology section and check out career guides in STEM at entechonline.com.
Additionally, to stay updated with the latest developments in STEM research, visit ENTECH Online. Basically, this is our digital magazine for science, technology, engineering, and mathematics. Also, at ENTECH Online, you’ll find a wealth of information.
Reference:
- Lo, S.-Y., Yang, C.-H., Chan, Y.-R., Chao, Y.-T., Lai, M.-J., & Li, H.-C. (2026). Co-transfected plasmids enhance transient expression of reporter genes. BioTech, 15(1), 23. https://doi.org/10.3390/biotech15010023
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