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Childhood Virus Mystery: How a Common Infection May Trigger Bladder Cancer

A new study from the UK has found a surprising link between a common childhood virus and bladder cancer later in life. Researchers discovered that the BK virus, which usually lies dormant in the kidney, can trigger DNA damage through the body's own antiviral defenses. This "friendly fire" effect damages cells and may explain why many bladder cancers show no trace of the virus when diagnosed. The findings suggest that early identification and control of the BK virus could become a new strategy for preventing this type of cancer.

Key Points: Study Links Common Childhood BK Virus to Later Bladder Cancer

  • Study reveals BK virus, often contracted in childhood, lies dormant in the kidney
  • Virus triggers DNA damage via the body's own antiviral "friendly fire"
  • Damage occurs in both infected cells and neighboring bystander cells
  • Findings could shift prevention focus from just smoking to early virus control
2 min read

Study links common childhood virus to bladder cancer

UK research reveals how the dormant BK virus can cause DNA damage, leading to bladder cancer years later, opening new prevention avenues.

"We found that DNA damage happens not only in infected cells but also in surrounding 'bystander cells' - Dr. Simon Baker, University of York"

New Delhi, Dec 4

UK researchers have found a common childhood virus that can trigger DNA damage leading to bladder cancer later in life.

Tackling the virus early could open the door to preventing bladder cancer later, said the team from the University of York.

The study, published in Science Advances, revealed that after being contracted in childhood, the BK virus usually lies dormant in the kidney.

BK virus infections do not have obvious symptoms, but physicians have learned a lot about the virus from the experiences of kidney transplant recipients who have to take immunosuppressants to prevent the immune system from targeting their new kidney.

In laboratory studies using the human tissue that lines the urinary tract (urothelium), the team observed DNA damage patterns caused by the cell's antiviral defences after controlled exposure to BK virus -- the childhood infection identified earlier as lying dormant in the kidney.

In this fight against the BK virus, "friendly fire" from enzymes meant to damage the virus can cause collateral damage in the cells' own DNA.

This evidence supports a theory in which an individual's own antiviral response to BK virus infection causes the DNA mutations that can lead to cancer.

"In other types of virus-related cancer, such as cervical cancer, we know that virus DNA combines with our own genetic material to drive tumour development. Our results have shown that in the bladder, the tissue's defensive response to the virus causes DNA changes which can lead to cancer,” said Dr. Simon Baker from the University.

"We found that DNA damage happens not only in infected cells but also in surrounding 'bystander cells,' witnessing infection in their neighbours. This is important because it might explain why most bladder cancers have no sign of the virus in them when they are diagnosed many years later," Baker added.

The BK virus usually lies dormant in the kidney. Immunosuppressants can allow dormant BK virus to reactivate, damaging the kidneys, ureter, and bladder.

Current bladder cancer prevention work asks people to stop smoking. The findings provide a new opportunity to help prevent bladder cancer through the identification and control of the BK virus earlier.

- IANS

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Reader Comments

A
Arjun K
Important research. But in the Indian context, we have so many other pressing health priorities. Will developing a vaccine or treatment for this BK virus be cost-effective here? Our public health funds should first tackle diseases causing immediate mortality. Still, good to know for the future.
S
Sarah B
The "friendly fire" concept is mind-blowing. Our own immune system's defense causing the damage that leads to cancer. Science is incredible. Hope this leads to early detection methods. Early intervention is key.
R
Rohit P
As someone whose father had bladder cancer, this hits home. He was a lifelong smoker, so we always blamed that. This study opens another door. More power to the researchers! 🙏 We need Indian institutions to conduct similar large-scale studies on our population.
M
Meera T
The article says the virus has no obvious symptoms. That's the most worrying part. How do we know if our child has it? And if it's so common, should we be panicking? Doctors and media need to explain this in simpler terms without causing unnecessary fear.
D
David E
A respectful criticism: The article jumps from a lab study to prevention possibilities very quickly. Correlation in a lab is not the same as causation in the real world. We need longitudinal human studies before talking about new prevention strategies. Still, a promising start.
V
Vikram M

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