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A batch of mini brains grown in a lab from stem cells have developed working eye structures, scientists report in a fascinating new paper. The tiny brain organoids being grown in dishes grew two optic cups, mirroring the development of eye structures in human embryos, Science Alerts reports. Scientists running the experiment believe the breakthrough could help humans better understand eye diseases. “Our work highlights the remarkable ability of brain organoids to generate primitive sensory structures that are light sensitive and harbour cell types similar to those found in the body,” said neuroscientist Jay Gopalakrishnan of University Hospital Dusseldorf in Germany. “These organoids can help to study brain-eye interactions during embryo development, model congenital retinal disorders, and generate patient-specific retinal cell types for personalised drug testing and transplantation therapies.”  Brain organoids are not full brains as we know them. They are small structures grown from stem cells harvested from adult humans. The stem cells have the potential to grow into many different types of tissue, this time growing into “blobs” of brain tissue. According to scientists the brains are not able to resemble any thoughts, emotions or consciousness. The “mini brains” are used for research purposes as actual living brains are “ethically tricky” to test on. This time, Gopalakrishnan and his colleagues were seeking to observe eye development. “Eye development is a complex process, and understanding it could allow underpinning the molecular basis of early retinal diseases,” the researchers wrote in their paper. “Thus, it is crucial to study optic vesicles that are the primordium of the eye whose proximal end is attached to the forebrain, essential for proper eye formation.” The tiny brains grew optic cups in just 30 days of development and became clearly visible after 50 days. In 314 brain organoids, 73% developed optic cups.  The post Scientists shocked as blob of human brain grows functioning eyes in lab dish appeared first on Linda Ikeji Blog.
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