The small organ evolved too many times for it to be an accident, but it’s still unclear what it does.
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Disruptions in the interaction between nuclear and mitochondrial DNA can lead to deficiencies in the mitochondrial energy-generating process, affecting fitness.
The first human trial of a treatment using induced pluripotent stem cells has received conditional approval from an institutional review board in Japan.
A small insect-eating animal is the common ancestor of whales, elephants, dogs, and humans.
Some of the 200 or so human embryonic stem cell lines approved for federal funding may have been derived from sperm or eggs of unconsenting donors.
Protein aggregates in the brains of some people with dementia or motor neuron disease have a surprising origin.
Tuberculosis bacteria find shelter from drugs and the body’s defenses in bone marrow stem cells.
One of the most advanced tuberculosis vaccines has failed to protect infants from getting the disease in a clinical trial, but it may be effective in adults.
A company offering experimental stem-cell treatments will carry out its procedures in Mexico after the FDA warned that it would need approval to operate in the U.S.
The eating schedule—and not the amount of calories—can make the difference between an obese, diabetic, sick mouse and one with a healthy metabolism.
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