Regenerating Lost Hair

We humans are driven by vanity. I'd give fair odds that tissue engineering of new hair will be widely available before tissue engineering of the simpler internal organs. Here's an example progress in this field: "Professor Lin Sung-jan took 10 hair follicles from rodents and cultivated 8 to 10 million dermal papilla cells in vitro in 20 days. Using aggregates of between 3 and 5 million dermal papilla cells, he mixed these with rodent skin cells and transplanted them onto bare rodent skin, which sprouted hair. ... Discovering that dermal papilla cells function to send signals and implement instructions, Lin developed biomaterial that can assemble and produce such cells. He also developed a bio-reaction device for use in mass-producing micro-tissues to induce hair follicle regeneration. Lin has also taken human hair follicles and conducted similar experiments, successfully growing hair on the skin of rodents. In future, he hopes to be able to control the size and color of hair grown."


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