Our ability to "read" DNA has made tremendous progress in the past few decades, but the ability to understand and alter the genetic code, that is, to "rewrite" the DNA-encoded instructions, has lagged behind. A new Weizmann Institute study advances our understanding of the genetic code: It proposes a way of effectively introducing numerous carefully planned DNA segments into genomes of living cells and of testing the effects of these changes. The study is being reported in the June issues of Nature Biotechnology and Nature Genetics.

Scientists at Aarhus University, Denmark in collaboration with the biotech company Cytoguide now publish a key to use glucocorticoid steroids in a kind of intelligent medicine that specifically hits the relevant cells. Data are based on rodent studies but if this principle is translated to humans it may greatly improve todays hazardous treatment with this type of potent steroids.

Researchers at Dana-Farber/Children's Hospital Cancer Center have devised a strategy to directly activate a natural "death" protein, triggering the self-destruction of cells. They say the development could represent a new paradigm for designing cancer drugs.