The discovery may make
brain cell transplants less controversial and more widely available.
Not exact matches
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.
Mice
transplanted with
cells grown from a patient suffering from Huntington's disease (HD) develop the clinical features and
brain pathology of that patient, suggests a study published in the latest issue of Acta Neuropathologica by CHA University in Korea, in collaboration with researchers at Université Laval in Québec City, Canada.
In this study, Cherqui's team
transplanted wildtype HSPCs into an FA mouse model, reporting that the HSPCs engrafted and soon differentiated into macrophages in key regions of the mice's
brain and spinal cord where they appeared to transfer wildtype FXN into deficient neurons and muscle
cells.
Scientists credited the impressive intellectual feats to human
cells transplanted into their
brains shortly after birth.
But the
cells must be taken from aborted fetuses, and up to seven fetal
brains are needed to provide enough for a single
transplant.
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.
If researchers can unlock the secrets of this cellular process, therapies that replace diseased
cells with healthy ones may one day be possible —
brain -
cell transplants to combat Alzheimer's, for instance, or even the creation of whole organs from scratch.
When they
transplanted embryonic
brain cells into mice that had already been conditioned to fear a sound, the researchers found these mice were significantly more responsive to extinction training.
The downside is that the
transplanted cells also fostered the growth of benign
brain tumors.
Yong - Chun Yu at Fudan University in Shanghai, China, and his team wondered if fearful adult mice could be helped by a
transplant of embryonic
brain cells.
Previous research in rodent disease models has shown that
transplanted oligodendrocyte precursor
cells derived from embryonic stem
cells and from human fetal
brain tissue can successfully create myelin sheaths around nerve
cells, sometimes leading to dramatic improvements in symptoms.
Transplants of neural stem
cells might be used to treat
brain injuries, but how to get them to the right location?
UC Davis researcher Min Zhao and Junfeng Feng, a neurosurgeon at Ren Ji Hospital, Shanghai, showed that they can steer
transplanted stem
cells (green, in inset on right) to one part of a rat's
brain using electrical fields.
By applying an electric field within the rat's
brain, they found that they could get the
transplanted stem
cells to swim «upstream» against the fluid flow and natural cues and head for other locations within the
brain.
Electric fields can be used to guide neural stem
cells transplanted into the
brain towards a specific location.
Scientists have enabled deaf gerbils to hear again — with the help of
transplanted cells that develop into nerves that can transmit auditory information from the ears to the
brain.
CSCs were prepared from 231BrM and CN34BrM
cells that were infected with lentivirus carrying with or without miR -7-2, and they were
transplanted into nude mice through intracardiac injection followed by monitoring metastatic tumor growth in the
brain.
UT Southwestern Medical Center researchers created new nerve
cells in the
brains and spinal cords of living mammals without the need for stem
cell transplants to replenish lost
cells.
Electric fields can be used to guide neural stem
cells transplanted into the
brain toward a specific location.
Once this was accomplished, they noticed the
cells didn't function when
transplanted into animal
brains.
In a world - wide first, Chinese scientists cloned two monkeys by
transplanting donor
cells into eggs, they said on Wednesday, a feat that could lead to genetically engineered primates for drug testing, gene editing and
brain research.
Los Angeles, CA (Scicasts)-- Investigators at Cedars - Sinai are exploring a new way to treat amyotrophic lateral sclerosis (ALS) by
transplanting specially engineered neural
cells into the
brain.
But one glimpse came in 2013, when scientists
transplanted human neural stem
cells into the
brains of mice which had damage in regions responsible for learning and memory.
Heterotopically
transplanted CVO neural stem
cells generate neurons and migrate with SVZ
cells in the adult mouse
brain.
Parkinson's patients in the 1980s were guinea pigs, getting fetal tissue
transplants — a precursor of stem -
cell therapy — in their
brains.
A new study investigates the long - term health of some of the earliest
cell transplants into HD patient
brains — and finds a surprising result.
You can give enzymes in the blood, but it won't cross the blood
brain barrier; but if you give
cells, or a
transplant, then it will engraft in the
brain as well and produce enzyme, or the other factors that are missing.
The Bone Marrow and Stem
Cell Transplant Program is expanding the use of this technique for patients with solid tumors including neuroblastoma and brain tumors; a variety of high - risk hematologic diseases, such as thalassemia major and transfusion - dependent sickle cell disease; and other nonmalignant disea
Cell Transplant Program is expanding the use of this technique for patients with solid tumors including neuroblastoma and
brain tumors; a variety of high - risk hematologic diseases, such as thalassemia major and transfusion - dependent sickle
cell disease; and other nonmalignant disea
cell disease; and other nonmalignant diseases.
Using the technique as a proof of principle, the researchers were able to detect
transplanted tumor
cells in animal
brains.
«The ultimate goal is for the
transplanted stem
cells to reconstruct the
brain circuitry that has been destroyed by Parkinson's and restore some function to the individual,» Mendez said.
Once the
cells are
transplanted, they will gradually begin to populate the
brain, establish connections, produce dopamine and within about nine months, it's predicted that Parkinson's symptoms would be reduced.
The
transplants helped to replenish the
brain by replacing
cells lost due to apoE4, regulating
brain activity and improving learning and memory abilities.
In the study, which was conducted in collaboration with researchers at UC San Francisco and published today in the Journal of Neuroscience, scientists
transplanted inhibitory neuron progenitors — early - stage
brain cells that have the capacity to develop into mature inhibitory neurons — into two mouse models of Alzheimer's disease, apoE4 or apoE4 with accumulation of amyloid beta, another major contributor to Alzheimer's.
Mendez, a pioneer who first
transplanted fetal stem
cells into patients»
brains at Dalhousie nearly a decade ago, is the only surgeon in Canada, and one of only a few in the world, who can perform the intricate procedure.
Researchers at Harvard - affiliated McLean Hospital have found that fetal dopamine
cells transplanted into the
brains of patients with Parkinson's disease were able to remain healthy and functional for up to 14 years, a finding that could lead to new and better therapies for the illness.
When these
cells are
transplanted into animal
brains, they survive, and turn into the correct type of
brain cell.
A possible strategy for treating neurodegenerative diseases is to
transplant stem
cells into the
brain that prevent existing nerve
cells from dying.
In this work, we
transplanted hematopoietic stem and progenitor
cells into the substantia nigra of
brains of two different mouse models of Parkinson's disease.
The first is therapy, such as
transplanting neurons into the
brain of Parkinson's patients or retinal
cells into the blind.
When
transplanted into mice, the neural stem
cells spontaneously developed into the three basic types of
brain cells: neurons, oligodendrocytes, and astrocytes.
Still, it opens the door towards the prospect of reprogramming
brain cells without the need for any
transplants or surgeries».
Replacing
brain cells using stem
cells from embryos was tried before but didn't work well, probably because we didn't understand how to look after the
cells, nurture them to become neurons and get them to make the right connections when
transplanted into HD
brain.