Reprogrammed stem cells hit a roadblock

It’s a discordant note in the symphony of good news that usually accompanies stem cell research announcements. Stem cells hold enormous promise in regenerative medicine, thanks to their ability to regenerate diseased or damaged tissues. They have ma…

Researchers isolate protein needed for stem cell maintenance

Scientists have finally laid hands on the first member of a recalcitrant group of proteins called the Wnts two decades after their discovery. Important regulators of animal development, these proteins were suspected to have a role in keeping stem cells in their youthful, undifferentiated state – a suspicion that has proven correct, according to research carried out in two laboratories at Stanford University Medical Center. The ability to isolate Wnt proteins could help researchers grow some types of stem cells for use in bone marrow transplants or other therapies.

Gene signature identifies leukemia patients who should avoid transplants

An international team of researchers has used a gene test to identify certain patients with adult T-cell acute lymphoblastic leukemia (ALL) who can be successfully treated with chemotherapy alone and should not be subjected to the rigors of bone marrow transplants. The researchers found that these patients survived for at least three years after being treated with intensive chemotherapy. It was previously known that only slightly over half of the patients with this disease could be cured with chemotherapy. Adult ALL patients often undergo transplants in an effort to beat back the stubborn disease. Until now there was no way to identify those who have a more favorable outlook and shouldn’t undergo risky bone marrow transplantation.