Done in by Genes

Discovered in the 1980s, ribozymes are RNA molecules with a very distinct hammerhead structure. They function as enzymes and directly cut RNA. Synthetic ribozymes targeted to specific messenger RNAs have been used in many laboratory studies with cells. Efforts to develop ribozyme treatments targeted to specific cancer genes and for other uses have not succeeded in clinical trials, partly because the structure of the ribozyme that is needed to allow it to work as an enzyme was destroyed when it was injected. 

Why are cancer cells attractive candidates for gene-specific therapies  

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A little sheep s blood may be just the thing to calm a distracted 

Since that time, transfusion of human blood has become safe and widely available. Advances that made this possible include the development of antiseptics to reduce infections from person 

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