Scientists Uncover Key Driver of Treatment-Resistant Cancer
These images show the beginnings of chromothripsis in colorectal cancer cells. The N4BP2 enzyme (green) infiltrates a micronucleus (zoomed in square selections), where it induces DNA damage (red). Blue represents the main cell nucleus.
Credit: UC San Diego Health Sciences
This is reported in a research paper in Science by researchers at the University of California, San Diego (UC San Diego).
The researchers discovered an enzyme responsible for breaking up a chromosome in cancer cells and rearranging it into a scrambled version, enabling the tumour to evolve rapidly. The process is quite simple and closely mimics evolution by natural selection, or the development of antibiotic resistance in bacteria. Shuffling genes in this way increases the likelihood that a small number of cancer cells will survive the treatment aimed at destroying them. The tumour then regrows from these resistant cells, producing a treatment-resistant cancer.
This ability, known as chromothripsis, is found in about 24% of human cancers.
The key to this process is the protein enzyme N4BP2, and the complex, specified gene that produces it. The process begins when an error in DNA replication causes individual chromosomes to become trapped inside tiny, fragile structures called micronuclei. When these micronuclei burst, the chromosome is exposed to nucleases — enzymes capable of breaking DNA.
Within the ID creationist paradigm, there are no such things as mistakes: everything works exactly as it was designed to work. So we are left to assume that these fragile micronuclei, with their entrapped chromosomes, are a deliberate design feature.
The researchers showed that N4BP2 is uniquely capable of entering micronuclei and breaking the trapped chromosome.
To test the hypothesis that N4BP2 is the culprit, they eliminated it in brain cancer cells and observed a reduction in chromothripsis. They then introduced it into healthy cell nuclei and found that it caused chromosomes to break even in otherwise normal cells.
This is, of course, just as much compelling evidence of intelligent design as anything traditionally cited by ID creationists as proof of an intelligent designer. By contrast, the theory of evolution provides an explanation with none of the problems that force creationists to retreat into contradictory theology, Bronze Age origin myths, and appeals to ‘mystery’.


































