Not exact matches
Stem cells have also been identified in human milk, and have the potential to differentiate
into mammary epithelial lineages under mammary differentiation conditions in vitro, as well as other
cell types in corresponding microenvironments, including bone
cells,
brain cells, liver
cells, pancreatic beta
cells and heart
cells.
Researchers chemically reprogrammed human
stem cells into small bundles of functional
brain cells that mimic the developing
brain.
The virus does this because, unlike most microbes, Zika can pass from blood
into the
brain, where it infects and kills
stem cells, having severe effects on developing
brains.
In the past decade, a handful of discoveries have unleashed a flood of research
into ways neural
stem cells can be used for treating degenerative
brain disorders and for
brain repair.
When the researchers tracked the
stem cells in the mice's
brains, they saw that only about 5 percent of them actually developed
into neurons, suggesting the
cells did not rescue memory by replacing dead neurons, LaFerla says.
In a separate but related study, scientists this week also announced that they successfully reversed Parkinson - like symptoms in several monkeys by transplanting human neural
stem cells into their
brains.
Curiously, the researchers discovered that only about five percent of the
stem cells injected
into the
brain - addled mice matured
into adult neurons.
But scientists are making progress in refining these therapies, and the first ever trial of fetal
stem cells injected directly
into the
brain is currently under way in children with Batten disease, a rare and fatal illness of the nervous system.
If you put embryonic
stem cells on a substrate like Jell - O — mechanically similar to
brain tissue — they turn
into neurons.
Scientists headed by Dr. Stevens Rehen differentiated human induced pluripotent
stem (iPS)
cells into neural
stem cells and
into further complex tridimensional structures, known as neurospheres and
brain organoids.
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.
«Disturbances to these processes may cause neuronal
stem cells to develop
into different types of
cells or may cause neurons to migrate to different locations in the
brain, changing neuronal circuitry and potentially leading to behavioral disorders like schizophrenia.»
They then encouraged the
stem cells to grow
into neurons, a type of
brain cell.
The team used human embryonic
stem cells — which can transform
into any
cell of the body — and cultured them in a mixture of chemicals to grow human
brain cells.
In the
Cell Stem Cell study, Zhiheng Xu of the Chinese Academy of Sciences in Beijing sidestepped the mice's natural resistance to Zika virus by injecting a Samoan isolate directly
into fetal
brains.
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.
A subset of the implanted human
stem cells matured
into rotund, humanlike astrocytes in the animals»
brains, taking over operations from the native mouse astrocytes.
Zheng, together with Leah Boyer, then a researcher in Gage's lab and now director of Salk's
Stem Cell Core, generated diseased neurons by taking skin cells from patients with Leigh syndrome, reprogramming them into stem cells in culture and then coaxing them to develop into brain cells in a d
Stem Cell Core, generated diseased neurons by taking skin
cells from patients with Leigh syndrome, reprogramming them
into stem cells in culture and then coaxing them to develop into brain cells in a d
stem cells in culture and then coaxing them to develop
into brain cells in a dish.
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.
The recipe, described in Nature, allows human pluripotent
stem cells to spontaneously attempt to assemble
into a tiny approximation of a whole
brain by making whatever
brain structures the
stem cells choose.
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.
«We putzed around and tried different things,» he said, and after some false starts — they weren't using quite the right
brain - making ingredients, so the
stem cells developed
into micro-pancreases and colons — it worked.
A 2010 study in
Stem Cells and Development showed that fetal cells can migrate to the brain of a mother mouse and mature into neurons, Nelson
Cells and Development showed that fetal
cells can migrate to the brain of a mother mouse and mature into neurons, Nelson
cells can migrate to the
brain of a mother mouse and mature
into neurons, Nelson says.
Novitch's UCLA lab group has likewise used its
brain organoids to pinpoint additional receptors by which the virus may gain entry
into neural
stem cells, and identified a few other drug leads for blocking infection.
The researchers implanted
stem cells from mouse embryos
into the
brains of rats and mice whose dopamine - producing neurons had been obliterated by a toxin.
Another is that the transplanted bits of tumor act nothing like cancers in actual human
brains, Fine and colleagues reported in 2006: Real - life glioblastomas grow and spread and resist treatment because they contain what are called tumor
stem cells, but tumor
stem cells don't grow well in the lab, so they don't get transplanted
into those mouse
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.
Various reports in recent years have claimed that
stem cells from one tissue — for example, blood — can mature
into other tissues such as muscle or
brain.
Scientists at Columbia's Zuckerman Institute have uncovered new insights
into how
stem cells transform
into brain cells that control leg movements.
Human fetal
stem cells injected
into the
brains of vervet monkeys may help treat the simian equivalent of Parkinson's, says Eugene Redmond of Yale University.
Stem cells hold tremendous promise for medicine; their ability to metamorphose
into other kinds of
cells make them useful for repairing injuries — from heart attacks to
brain damage.
To replicate these
cell culture results, Rani used human
stem cells to grow neurons
into what is called a mini
brain.
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.
With a bit of persuasion they can be transformed
into pluripotent
stem cells capable of developing
into all manner of tissues, from bone to blood to
brain.
In a study spanning molecular genetics,
stem cells and the sciences of both
brain and behavior, researchers at University of California San Diego, with colleagues at the Salk Institute of Biological Studies and elsewhere, have created a neurodevelopmental model of a rare genetic disorder that may provide new insights
into the underlying neurobiology of the human social
brain.
Normally, adult
stem cells can only morph
into the type of tissue in which they reside, such as blood,
brain or muscle.
From there, researchers can prompt the
stem cells to turn
into brain cells for further study.
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.
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.
Neuroscientists Jing Wang and Freda Miller, both then at Toronto's Hospital for Sick Children, showed that when nondiabetic mice are given metformin, their memory improves, thanks to an increase in the neural
stem cell population and in the number of these
cells that develop
into healthy neurons in the hippocampus, the
brain's memory center.
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.
«The blood -
brain barrier forms pretty early in gestation, so the thyroid hormone, even from the mother, is probably not getting through the barrier and
into the
brain, likely leading to developmental deficits,» says Shusta, whose group was among the first to develop blood -
brain barriers from patient - derived
stem cells in the lab dish.
THE GREAT DIVIDE Young
brain stem cells (one shown dividing, left) pack old proteins tagged with ubiquitin (red)
into one daughter
cell.
To grow larger
brains, the
stem cells would also have to differentiate
into blood vessels to supply nutrients to the growing organoid.
«By activating TLR3, the Zika virus blocks genes that tell
stem cells to develop
into the various parts of the
brain.
After concluding that increased
stem cell production in a certain area of the
brain had a positive effect on behavioral deficits of Alzheimer's, Prof. Offen has moved to research
into the area of the
brain that controls memory.
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.
However, in developing
brain cells, the researchers found TLR3 activation also influences 41 genes that add up to a double whammy in this model — diminished
stem cell differentiation
into brain cells and increased
cell suicide, a carefully controlled process known as apoptosis.
Several years ago, one of the students in Verma's lab noticed that BRCA1 is very active in the neuroectoderm, a sliver of embryonic tissue containing neural
stem cells that divide and differentiate
into the
brain's vast assortment of
cell types and structures.