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Scientists engineer chickens to lay eggs containing human cytokines

Scientists are growing human cytokines in chicken eggs, and a proof-of-concept study in BMC Biotechnology found that the approach could be less expensive than existing ways of making cytokines without harming chickens. Hens were genetically engineered to produce interferon alpha-2a, which has antiviral and cancer-fighting properties, and human and porcine forms of fusion colony-stimulating factor 1, which is involved in tissue repair.

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