Scientists at Kyoto University in Japan have developed a gene delivery system, involving gold nanorods and a near infrared laser, which can transport a gene into cells and activate it.Changing gene expression is a powerful way to affect cell behavior, and scientists hope to use this approach to treat a variety of diseases. Researchers have developed a range of nanoparticle systems to deliver genes into cells. However, regulating when the gene is activated using an external signal, like light, adds a sophisticated level of control.

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