Here is a summary of the ScienceDirect 2025 study on the effects of direct current stimulation (DCS / comparable to tDCS) on cellular and genetic processes.
The original work was published as a Journal Pre-Proof in Neurobiology of Disease and, for the first time in a living organism, demonstrates a temporally structured change in gene activity induced by direct current stimulation.
Can gentle electrical current change genes?
In this study, scientists wanted to determine whether a weak, harmless direct current – like the one used in transcranial direct current stimulation (tDCS) – not only alters the electrical activity of nerve cells, but also interacts more deeply with biology.
In other words:
Can electrical current influence how cells function?
Why was no human tested?
Instead of starting with humans, researchers chose a simple marine organism called Botryllus schlosseri.
Although small and seemingly insignificant, this organism shares a surprisingly large number of genes with humans – including genes involved in:
- aging
- inflammation
- neurodegeneration
- cellular repair
- metabolism
This makes it an intriguing model for fundamental biological research.
What exactly was done?
- A very weak current of 0.5 milliamperes was applied for 30 minutes.
- A control group received sham stimulation.
- Researchers then examined:
- heartbeat
- behavioral response
- and most importantly: Which genes inside the cells became more or less active
Measurements were taken after 3 hours, 24 hours, and 48 hours.
Was it safe?
Yes.
- The animals remained healthy.
- No lasting damage occurred.
- Heartbeat and behavior changed temporarily but returned to baseline.
This is important because it shows: The electrical current was biologically active, but not destructive.
What happened inside the cells?
This is where it becomes truly interesting.
The electrical stimulation actually changed the activity of many genes – in a time-dependent manner.
One can imagine this as switching biological programs on and off.
Early phase – 3 hours
Genes were activated that are involved in:
- regulation of inflammation
- antioxidant protection
- cellular communication
- early repair processes
At the same time, other programs were dampened, particularly those related to stress responses.
After 24 hours
The pattern shifted.
Programs were activated that relate to:
- cell cycle regulation
- autophagy (cellular “cleaning”)
- energy production
Autophagy is particularly important:
It is the process by which cells remove damaged components – a central mechanism in aging and neurodegeneration.
After 48 hours
At this stage, a particularly remarkable pattern emerged.
Genes were activated that are responsible for:
- DNA repair (e.g., PARP pathways)
- mitochondrial biogenesis (energy production)
- autophagy (e.g., BECN1)
- neuronal stability and synaptic function
Meanwhile, genes were downregulated that are involved in:
- mitochondrial apoptosis (cell death programs)
- disturbed protein folding
- neurodegenerative stress responses
In other words:
The electrical current appeared to activate repair and protective programs while dampening degenerative pathways.
Why is this so relevant?
Until now, tDCS was mainly understood as affecting:
- the electrical activity of neurons
- the modulation of neural networks
However, this study suggests:
Electrical stimulation may act also at the molecular level.
It may:
- promote repair mechanisms
- stabilize mitochondrial energy processes
- modulate inflammation
- influence autophagy
- activate neuroprotective programs
This represents a completely different dimension compared to pure “excitability modulation.”
Does this mean tDCS cures Alzheimer’s or Parkinson’s disease?
No.
This study was conducted in an animal model.
It does not prove a cure.
However, it provides an important foundation:
The biological effects of direct current stimulation appear to reach deeper than previously assumed.
What could this mean for patients?
If these mechanisms are confirmed in humans, tDCS might:
- have neuroprotective effects
- support repair processes
- influence aging mechanisms
- modulate inflammatory pathways
- slow degenerative signaling cascades
This could explain why some clinical studies observe lasting benefits – even after relatively short stimulation series.
Simple summary in one sentence
A gentle, harmless direct current can, in a living organism, alter the activity of hundreds of genes – including genes essential for cellular protection, energy production, DNA repair, and neuronal stability.
Google CENSORSHIP!
Google censors my homepage quite a bit, sometimes I am not even able to find my articles on Google. So please sign up for the newsletter and share it with friends or via Facebook and use the search function on my website. Follow me on Twitter, where I also announce important articles.
