Japan researchers grow kidney tissue from stem cells

TOKYO — Researchers in Japan said Wednesday they have succeeded in growing human kidney tissue from stem cells for the first time in a potential breakthrough for millions with damaged organs who are dependent on dialysis.

Kidneys have a complex structure that is not easily repaired once damaged, but the latest findings put scientists on the road to helping a diseased or distressed organ fix itself.

Kenji Osafune of Kyoto University said his team had managed to take stem cells -- the "blank slates" capable of being programmed to become any kind of cell in the body -- and nudge them specifically in the direction of kidney tissue.

"It was a very significant step," he told AFP. Osafune said they had succeeded in generating intermediate mesoderm tissue from the stem cells, a middle point between the blank slate and the finished kidney tissue.

"There are about 200 types of cells in the human body, but this tissue grows into only three types of cells," namely adrenal cells, reproductive gland cells and kidney cells, he said, adding that as much as 90 percent of cultures in their research developed into viable mesoderm tissue...

Monitoring and robust induction of nephrogenic intermediate mesoderm from human pluripotent stem cells

A method for stimulating the differentiation of human pluripotent stem cells into kidney lineages remains to be developed. Most cells in kidney are derived from an embryonic germ layer known as intermediate mesoderm. Here we show the establishment of an efficient system of homologous recombination in human pluripotent stem cells by means of bacterial artificial chromosome-based vectors and single-nucleotide polymorphism array-based detection. This system allowed us to generate human-induced pluripotent stem cell lines containing green fluorescence protein knocked into OSR1, a specific intermediate mesoderm marker. We have also established a robust induction protocol for intermediate mesoderm, which produces up to 90% OSR1⁺ cells. These human intermediate mesoderm cells can differentiate into multiple cell types of intermediate mesoderm-derived organs in vitro and in vivo, thereby supplying a useful system to elucidate the mechanisms of intermediate mesoderm development and potentially providing a cell source for regenerative therapies of the kidney.

True to form, when it's not sourced from embryos, AFP and the rest of the mutts in the media won't tell you.

Thank you, Mr. Patriot, for digging for that miniscule item of info. The Brave New World treats scientific facts as if they were spent fuel rods, needing to be buried near the earth’s core, and saving we hoi polloi from contamination.

They need to automate cell passaging; currently human hands and lab air come into close contact with cell cultures, leading to very much contamination and extra work.

When they can use new tech to non-intimately replenish cell culture fluid then a whole host of problems will go away.

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