How exactly can a virus cause cancer?

How exactly can a virus cause cancer?

Blue Sky Science: Why do some viruses cause cancer?

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answers (2)

Answer 1
January, 2021

Certain viral diseases provoke oncology more than others. Below - about such effective catalysts:

  • Epstein Barr virus , abbreviated - EBV, often leads to cancer of the nasopharynx, tumors in Burkitt's lymphoma;
  • Hepatocellular cancer often progresses with type B and C hepatitis ;
  • Human papillomavirus , more often than many diseases leads to cancer of the skin, prostate glands, reproductive and digestive system organs;
  • Leukemia affecting T-cells, quite logically caused by T -cellular lymphotropic virus ;
Answer 2
January, 2021

The virus itself is only one of the conditions necessary for the emergence of a tumor.

In short, viruses can live and multiply only in genetically active cells (and they are not always active in the norm). Some viruses are able to “activate” infected cells independently of normal ones, suppressing or bypassing the body's defense processes. As a result, genetic damage accumulates in the affected cells, the cells, despite this, survive (normally they should undergo programmed death - apoptosis). You can read more about how this happens here

As a result, after the accumulation of a critical amount of the necessary mutations, the infected cells become completely autonomous and immortal, that is, they become malignant.

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