Stem cells can be coaxed to self-assemble into structures resembling human embryos.
Yue Shao had never seen anything quite like it.
Two years ago, Shao, a mechanical engineer with a flair for biology, was working with embryonic stem cells, the kind derived from human embryos able to form any cell type. As he experimented with ways of getting cells to form more organized three-dimensional structures by growing them in scaffolds of soft gel, he was looking for signs of primitive neural tissue.
What drew his attention was that the cells seemed to change much faster than expected—they arranged themselves rapidly over a few days into a lopsided circle.
What was it? Shao startled Googling to see if he could identify the structure. That’s when he landed on a website called The Virtual Human Embryo and found some microscope photos of ten-day old human embryos shortly after implantation, fused to the uterine wall. There was the beginning of the amniotic sac and, inside it, the embryonic disc, or future body. They matched what he was seeing.
The Food and Drug Administration was more than likely correct to reject Biohaven Pharmaceuticals’ treatment for spinocerebellar ataxia, a rare and debilitating neurodegenerative disease. At the very least, the decision announced Tuesday night was not a surprise to anyone paying attention. Approval...
Beth Schafer lay in a hospital bed, bracing for the birth of her son. The first contractions rippled through her body before she felt remotely ready. She knew, with a mother’s pit-of-the-stomach intuition, that her baby was not ready either...
A man going by the name “Rod Kissme” claims to have “very strong sperm”. It may seem like an eccentric boast for a Facebook profile page, but then this is no mundane corner of the internet. The group where Rod...
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