:: Posted by American Biotechnologist on 07-14-2014
The ability to reliably and safely make in the laboratory all of the different types of cells in human blood is one key step closer to reality.
Writing today in the journal Nature Communications, a group led by University of Wisconsin-Madison stem cell researcher Igor Slukvin reports the discovery of two genetic programs responsible for taking blank-slate stem cells and turning them into both red and the array of white cells that make up human blood.
The research is important because it identifies how nature itself makes blood products at the earliest stages of development. The discovery gives scientists the tools to make the cells themselves, investigate how blood cells develop and produce clinically relevant blood products.
“This is the first demonstration of the production of different kinds of cells from human pluripotent stem cells using transcription factors,” explains Slukvin, referencing the proteins that bind to DNA and control the flow of genetic information, which ultimately determines the developmental fate of undifferentiated stem cells.
During development, blood cells emerge in the aorta, a major blood vessel in the embryo. There, blood cells, including hematopoietic stem cells, are generated by budding from a unique population of what scientists call hemogenic endothelial cells. The new report identifies two distinct groups of transcription factors that can directly convert human stem cells into the hemogenic endothelial cells, which subsequently develop into various types of blood cells.
The factors identified by Slukvin’s group were capable of making the range of human blood cells, including white blood cells, red blood cells and megakaryocytes, commonly used blood products.
:: Posted by American Biotechnologist on 07-10-2014
This is great but I can’t believe that it actually got published!
:: Posted by American Biotechnologist on 07-04-2014
A breakthrough discovery into how living cells process and respond to chemical information could help advance the development of treatments for a large number of cancers and other cellular disorders that have been resistant to therapy. An international collaboration of researchers, led by scientists with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley, have unlocked the secret behind the activation of the Ras family of proteins, one of the most important components of cellular signaling networks in biology and major drivers of cancers that are among the most difficult to treat.
:: Posted by American Biotechnologist on 06-25-2014
A man with almost no hair on his body has grown a full head of it after a novel treatment by doctors at Yale University.
There is currently no cure or long-term treatment for alopecia universalis, the disease that left the 25-year-old patient bare of hair. This is the first reported case of a successful targeted treatment for the rare, highly visible disease.
The patient has also grown eyebrows and eyelashes, as well as facial, armpit, and other hair, which he lacked at the time he sought help.
“The results are exactly what we hoped for,” said Dr. Brett A. King, assistant professor of dermatology at Yale University School of Medicine and senior author of a paper reporting the results online June 18 in the Journal of Investigative Dermatology. “This is a huge step forward in the treatment of patients with this condition. While it’s one case, we anticipated the successful treatment of this man based on our current understanding of the disease and the drug. We believe the same results will be duplicated in other patients, and we plan to try.”
:: Posted by American Biotechnologist on 06-12-2014
Why would already abundant ‘natural killer’ cells proliferate even further after subduing an infection? It’s been a biological mystery for 30 years. But now Brown University scientists have an answer: After proliferation, the cells switch from marshaling the immune response to calming it down. The findings illuminate the functions of a critical immune system cell important for early defense against disease induced by viral infection.