In 2006, Fire and Craig Mello shared the
Nobel Prize in Physiology or Medicine for work first published in 1998 in the journal
Nature. Fire and Mello, along with colleagues SiQun Xu, Mary Montgomery, Stephen Kostas, and Sam Driver, reported that tiny snippets of double-stranded
RNA (dsRNA) effectively shut down specific genes, driving the destruction of
messenger RNA (mRNA) with sequences matching the dsRNA. As a result, the mRNA cannot be translated into protein. Fire and Mello found that dsRNA was much more effective in gene silencing than the previously described method of RNA interference with single-stranded RNA. Because only small numbers of dsRNA molecules were required for the observed effect, Fire and Mello proposed that a catalytic process was involved. This hypothesis was confirmed by subsequent research. The Nobel Prize citation, issued by Sweden's
Karolinska Institute, said: "This year's Nobel Laureates have discovered a fundamental mechanism for controlling the flow of genetic information." The
British Broadcasting Corporation (BBC) quoted Nick Hastie, director of the
Medical Research Council's Human Genetics Unit, on the scope and implications of the research: {{blockquote|It is very unusual for a piece of work to completely revolutionise the whole way we think about biological processes and regulation, but this has opened up a whole new field in biology. == Awards and honors ==