Stem cells allow researchers to collect blood or skin samples from living patients and
turn them into the brain cells affected by the disease — neural progenitor cells (NPCs) and neurons.
The scientists collected skin cells from 19 people, aged from birth to 89, and prompted them to
turn into brain cells using both the induced pluripotent stem cell technique and the direct conversion approach.
From there, researchers can prompt the stem cells to
turn into brain cells for further study.
The epigenetic programming established during development is normally quite stable (skin cells do not spontaneously
turn into brain cells during adult life), but it is not irreversible.
Not exact matches
Says head researcher Alan Mackay - Sim, «Apart from neural and
brain cells, they look like they can
turn into blood
cells, heart muscles, and skeletal muscle.»
The new findings prove that a group of
cells in the
brain can
turn a short - lived sensation
into complex, long - lasting muscle movements, says physiologist Simon Alford of Northwestern University.
If you put embryonic stem
cells on a substrate like Jell - O — mechanically similar to
brain tissue — they
turn into neurons.
Those issues emerged 17 years ago, when a Stanford colleague of Greely's proposed implanting human stem
cells into mouse
brains to see what would happen when the former
turned into neurons; the experiment has not yet happened.
In «Diabetic rats cured with their own stem
cells ``, we report how researchers cured diabetic rats by
turning brain stem
cells extracted through the nose
into insulin - producing
cells in the pancreas.
Johns Hopkins researchers have developed a method to efficiently
turn human stem
cells into retinal ganglion
cells, the type of nerve
cells located within the retina that transmit visual signals from the eye to the
brain.
However, occasionally germ
cells can get trapped in the wrong part of the body during development and may later
turn into brain tumours, for example.
In the present study, her team took skin
cells from patients with lissencephaly and
turned them
into iPS
cells, which they then cultivated under special conditions
into neuronal stem
cells and neurons that are copies of those in the patients»
brains.
On the other hand, the problem is, you know, with embryonic stem
cells, they haven't been able to get stem
cell lines from livestock animals that can proliferate in that way, without just sort of veering up in their own direction and
turning into, instead of muscle,
turning into brain tissue or bone tissue or something else.
When they found a good candidate that could deliver genes to rat
brain cancer
cells, they filled the nanoparticles with DNA encoding an enzyme, herpes simplex virus type 1 thymidine kinase (HSVtk), which
turns a compound with little effect
into a potent therapy that kills
brain cancer
cells.
All formed the same types of stem
cells, which give rise to «progenitor»
cells that, in
turn, divide
into neurons and eventually organize themselves in six layers of
brain tissue.
Earlier this year, Lerner, Xie and their colleagues reported using the new method to find an antibody that can perform the remarkable trick of
turning bone marrow
cells into young
brain cells, via a previously unknown signaling mechanism.
Most of these trials involve stem
cell - derived neural progenitor
cells, which can
turn into several different types of
brain or spinal cord
cells, or oligodendrocyte progenitor
cells, which create the myelin sheaths that insulate and protect nerve
cells.
McKay announced that he had mitigated the symptoms of Parkinson's in rats by using mouse embryonic stem
cells that he had
turned into dopamine - producing
brain cells.
But at the end of the first year, the team examined the
brains of half the monkeys and found that the stem
cells had
turned into dopamine - releasing
cells.
In
turn, hyper - activated TLR3
turns off genes that stem
cells need to specialize
into brain cells and
turns on genes that trigger
cell suicide.
Two teams
turned embryonic stem
cells into brain cells, stained differently in these pictures.
Neural stem
cells, normally destined to
turn into neurons and other
brain cells, instead become muscle when they are put in contact with muscle
cells, researchers now report.
«It
turns out that calnexin is somehow involved in controlling the function of the blood -
brain barrier,» said Marek Michalak, a distinguished professor of biochemistry at the U of A. «This structure usually acts like a wall and restricts the passage of
cells and substances from the blood
into the
brain.
Stem
cells also can be
turned into any type of
cell in the body, including
brain cells.
Scientists at the University of Luxembourg have succeeded in
turning human stem
cells derived from skin samples
into tiny, 3 - D,
brain - like cultures that behave very similarly to
cells in the human midbrain.
Most of these trials involve stem
cell — derived neural progenitor
cells, which can
turn into several different types of
brain or spinal cord
cells, or oligodendrocyte progenitor
cells, which create the myelin sheaths that insulate and protect nerve
cells.
One such antibody agonist, which can
turn stem - like
cells in bone marrow
into young
brain cells, was described in a report in the Proceedings of the National Academy of Sciences last month.
In this method, skin
cells are
turned directly
into brain, heart, liver, or pancreas
cells without going through a stem
cell stage first.
Gladstone scientist Dr. Sheng Ding has exposed more chameleon - like qualities of the human skin
cell, using chemical cocktails to
turn skin
cells into fully functional
brain, heart, liver, and insulin - producing pancreas
cells.
Recently, Dr. Ding achieved entirely gene - free chemical reprogramming, using only drugs to
turn fibroblasts directly
into brain cells.
These
cells make
brain; some will
turn into dopamine
cells and others will want to become forebrain — but if you already have a forebrain, growing another one is not going to help you!
The focus now is on getting better at growing the
cells and
turning them
into the right kind of
brain cell before starting new trials in patients.
Neurons - the
brain cells that use electricity to do thinking stuff - are really hard to
turn into a treatment.
Deep inside your
brain, a legion of stem
cells lies ready to
turn into new
brain and nerve
cells when you need them.
Barcelona, studies the process by which stem
cells turn into neurons, the type of
brain cells that malfunction and die in HD.
Stem
cell scientist Sheng Ding has used his unique drug cocktails to
turn skin
cells into brain, heart, liver, and insulin - producing pancreas
cells.
Clive Svendsen from Cedars Sinai introduces the work of the HD iPSC Consortium - a group of scientists working on
turning skin
cells into brain cells.
There are now multiple immunotherapies targeting clearance of alpha - synuclein from the
brain in early - stage clinical trials, and multiple trials underway or in the works on the next generation of
cell replacement therapies for dopaminergic neurons, including the TRANSEURO trial; the Summit4StemCell initiative, put together by Jeanne Loring — a researcher at The Scripps Research Institute who is exceptionally engaged with
turning her research
into therapies; a Japanese trial to be run by Jun Takahashi of Kyoto University in Japan (cf. here and here); and a trial centered at Memorial Sloan Kettering Cancer Center headed by
cell biologist Lorenz Studer.
The researchers, however, observed that older
brains formed fewer blood vessels and possessed a smaller pool of progenitor
cells — the early descendants of stem
cells that
turn into neurons.
When these
cells are transplanted
into animal
brains, they survive, and
turn into the correct type of
brain cell.
Adding additional factors can then
turn these iPS
cells into heart,
brain, blood, liver, pancreas, and other
cells.
Previously, scientists had been uncertain if they would simply
turn into another type of immune
cell, known as microglia, that are abundant in the
brain.
For example, if a human HAR — one that
turned up the human gene a lot — was injected
into a chimpanzee
brain cell, it would function the same way by
turning up the activity of the chimp neuron a lot.
They found that only about 4 percent of them
turned into neurons, indicating the stem
cells were not improving memory simply by replacing the dead
brain cells.
It is now almost routine to grow skin
cells from a patient with, say, a neurological disease;
turn them
into pluripotent
cells in a Petri dish; convert the
cells into nerve
cells to study the disease process; and contemplate using the
cells to repair the same patient's damaged
brain.
Scientists recently figured out that they can grow stem
cells that
turn into those parts of your
brain.
The plot itself follows the creature feature formula to the letter, offering not a single twist or
turn to force your
brain cells into action.
Many invertebrates can regenerate body parts like lost tails or arms, but crayfish naturally
turn blood
cells into brain cells.