Using iPS, researchers are moving very quickly in understanding cell differentiation and already manage to recreate a mini-organ in vitro after 20-30 days of differentiation. These mini-organs of brain, liver, heart and so one can be used as in vitro assay to test efficiency of new drugs. Furthermore, new perspectives in personalized medicine also open in oncology, stem cells from cancerous tissue of the patient can be grown to produce a tumor organoid. From the patient cells to find new drug using phenotypic screening is now a new opportunity to innovate in medicine.

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