Advertisement
ProteinSimple
ProteinSimple

Watch out for the neighbors

Radiation induces DNA breaks, leading to chromosomal rearrangements. But do the breaks come first, followed by a wandering through the nucleus to find a suitable partner for the free DNA end? Or is the partner already nearby at the time of the break? In the 6 October Science, Nikiforova et al. provide evidence for the latter theory (Science 2000, 290:138-141). They look at papillary thyroid cancer, in which a radiation-induced inversion often fuses the genes for H4 and the RET receptor tyrosine

By | October 10, 2000

Radiation induces DNA breaks, leading to chromosomal rearrangements. But do the breaks come first, followed by a wandering through the nucleus to find a suitable partner for the free DNA end? Or is the partner already nearby at the time of the break? In the 6 October Science, Nikiforova et al. provide evidence for the latter theory (Science 2000, 290:138-141). They look at papillary thyroid cancer, in which a radiation-induced inversion often fuses the genes for H4 and the RET receptor tyrosine kinase. In normal thyroid cells the genetic distance between these two genes is 30 Mb, but Nikiforova et al. find that in 35% of thyroid cells the genes are physically very close together. The restriction of the RET-H4 rearrangement to thyroid cancers (and not lymphomas or breast cancers) may have two different explanations. Lymphocytes, at least in mice, are not transformed by activated RET, and mammary epithelial cells do not show association of the RET and H4 genes.

Advertisement
Advertisement
Lonza
Lonza

Popular Now

  1. The Mycobiome
    Features The Mycobiome

    The largely overlooked resident fungal community plays a critical role in human health and disease.

  2. Turning Tumor Cells Against Cancer
  3. Brazil’s Pre-Zika Microcephaly Cases
    The Nutshell Brazil’s Pre-Zika Microcephaly Cases

    A review of four years’ worth of medical records finds far greater numbers of microcephaly cases from before the ongoing Zika virus epidemic than had been officially reported.

  4. Aging Shrinks Chromosomes
Advertisement
Bertin Technologies
Bertin Technologies
Advertisement
Life Technologies