Notch signaling is essential for radial
glia stem cell proliferation and a determinant of neuronal number in the mammalian cortex.
An image of tissue that's grown in a dish shows radial
glia stem cells that are red, neurons in blue and the AXL receptor in green.
Not exact matches
Within two to 12 weeks, the organoids were sprouting additional neurons, including ones found in very specific regions of the human cortex;
glia cells including astrocytes; and neural
stem cells.
The mice benefited from human
stem cells called glial progenitors, immature cells poised to become astrocytes and other
glia cells, the supposed support cells of the brain.
A study in the International Society for
Stem Cell Research's journal
Stem Cell Reports, published by Cell Press on November 20 shows that a Sox2 protein, alone or in combination with another protein, Ascl1, can cause nonneuronal cells, called NG2
glia, to turn into neurons in the injured cerebral cortex of adult mice.
When the researchers injected human umbilical
stem cells behind the retinas of these rats, the Müller
glia remained healthy, as did the neural synapses.
In fact, both human and zebrafish eyes contain Müller
glia, an «inducible»
stem cell type that gives zebrafish their remarkable regenerative abilities.
«By harnessing the lineage tracing methods that are available in the fly, he was able to adapt them to label the
glia and motor neurons that are born from the same
stem cell in two different colors.»
Understanding the coordinated development of motor neurons and
glia may inform ways to prod
stem cells into generating more
glia after someone suffers an injury with nerve damage.
One of the team's most exciting new observations suggests a link between autism and a type of neural
stem cell called outer - radial
glia (oRGs), discovered by the Kriegstein lab in 2010.
Sometimes referred to as the
stem cells of the zebrafish eye, Müller
glia are the cells from which all other types of retinal cells are regenerated in the fish.
With PAR3 out of the picture, neural
stem cells and progenitors are free to differentiate into new neurons and
glia.
The researchers donned their thinking caps to explain how neural
stem and progenitor cells differentiate into neurons and related cells called
glia.
oRG
stem cells are extremely rare in mice, but common in primates, and look and behave quite differently from familiar ventricular radial
glia.
The
stem cell closely resembles the radial glial cell in structure and behavior and, like the radial
glia, has radial fibers which newborn neurons migrate along up to the neocortex.
In 2010, Kriegstein's lab discovered a new type of neural
stem cell in the human brain, which they dubbed outer radial
glia (oRGs) because these cells reside farther away from the nurturing ventricles, in an outer layer of the subventricular zone (oSVZ).
Towards our goals we study retinal cells throughout their life, from embryonic
stem cells to retinal progenitors to differentiating and mature neurons and
glia — with one eye on neuronal regeneration (meaning de-novo neurogenesis) in the mammalian retina — and with another eye on retinal disease pathomechanisms.