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Science News for August 11, 2004


RNA could form building blocks for nanomachines

A research team from Purdue University has successfully created RNA-based nanoscale structures, which could be used as building blocks for microscopic machines. The researchers have developed methods to self-assemble RNA molecules into complex shapes, such as arrays that can form the scaffolding on which other components could be mounted.

SourcePurdue University·JournalNano Letters·DateAug 11, 2004

Children with serious insect-sting allergies should get shots to avoid life-threatening reactions

Researchers found that children who received venom allergy shots had significantly fewer life-threatening reactions when restung, even years later. Dr. Rebecca Gruchalla recommends the shots for kids with severe allergic reactions to insect stings, which are responsible for at least 40 fatal stings per year.

SourceUT Southwestern Medical Center·JournalNew England Journal of Medicine·DateAug 11, 2004

Tobacco promising factory for biopharmaceuticals

Transgenic tobacco plants produce recombinant proteins economically, benefiting from plant-made vaccines with reduced viral screening costs. The process of recovering and purifying these proteins is expensive, requiring development of more economical techniques to lower production costs.

Leukemia stem cells identified by Stanford researchers

Researchers at Stanford Medicine have identified leukemia stem cells in chronic myelogenous leukemia, a breakthrough that could lead to new targeted therapies. The discovery reveals that normal adult cells can mutate into cancer stem cells, which are resistant to chemotherapy and require a specific protein called Wnt to self-renew.

SourceStanford Medicine·JournalNew England Journal of Medicine·DateAug 11, 2004