Researchers demonstrated that the drugs pemetrexed and gemcitabine killed cells from
mouse and human brain tumors, called group 3 medulloblastoma, growing in the laboratory.
In a new study, published 11 August in Science, researchers classified neurons from
mouse and human brain tissue by their methylation patterns.
Because
the mouse and human brains have much in common, co-lead study investigator William Muñoz, an MD - PhD student at NYU Langone, says the team's findings advance the field's understanding of how the brain processes touch, smell, hearing, sight, and taste.
Because
the mouse and human brains have much in common, co-lead study investigator William Muñoz, an MD / PhD student at NYU Langone, says the team's findings advance the field's understanding of how the brain processes touch, smell, hearing, sight, and taste.
«Our goal is to create a parts list of
both mouse and human brains.»
Not exact matches
Researchers have injected
mice with
human breast, ovary, colon, bladder,
brain, liver
and prostate tumors,
and their new drug has killed the tumors every time.
This need stems from the mammalian
brain, a commonality that affects cats, dogs,
mice...
and humans!
This region has the highest oxytocin levels in the
brain and has high levels of oxytocin receptors across all species from
mice to
humans.
Compared with
mice with cells from healthy people as well as non-chimera
mice, those whose
brains had
human schizophrenia cells were more afraid to explore a maze, more anxious, more antisocial, less able to feel pleasure (from sipping sugar water), worse at remembering,
and more sleepless — all of which characterize people with schizophrenia, too.
«We don't know if the observed reversibility of the disease symptoms as observed in the
mouse,» he says, «exists in
humans who have a much longer period of pre -
and post-natal
brain development than
mice — months
and years in
humans, weeks in
mice.»
Implanting
human brain organoids in a
mouse brain gives them everything they need to grow
and develop.
The Salk team therefore took
human brain organoids that had been growing in lab dishes for 31 to 50 days
and implanted them into
mouse brains (more than 200 so far) from which they had removed a tiny bit of tissue to make room.
The
mice behaved just like others of their kind, as far as scientists could tell,
and they also looked the same — except for the
human mini
brain that had been implanted into each rodent's own cortex, made visible by a little clear cover replacing part of their skull.
In
human cells
and in
mice, the virus infected
and killed the stem cells that become a glioblastoma, an aggressive
brain tumor, but left healthy
brain cells alone.
The behavioral tests used here modeled one dimension of the disease — an inability to experience pleasure from normal activities — but not others, such as stress
and anxiety,
and probably tap into different
brain mechanisms in
mice than in
humans, he says.
Duke scientists have shown that it's possible to pick out key changes in the genetic code between chimpanzees
and humans and then visualize their respective contributions to early
brain development by using
mouse embryos.
The researchers, reporting online March 5 in the American Journal of Reproductive Immunology, also say they found that an anti-inflammatory drug that is FDA - approved for rheumatoid arthritis
and is believed to be safe for
humans to take during pregnancy halted the
brain injury in
mouse offspring.
To investigate, Walker Jackson of the Whitehead Institute in Boston, Massachusetts,
and his colleagues created
mice with a mutation associated with the
human prion disease Fatal Familial Insomnia
and injected some of their
brain tissue into the
brains of
mice without the mutation.
Beta - amyloid protein is found in the
brains of
mice and humans.
An inflammatory protein that triggers a pregnant
mouse's immune response to an infection or other disease appears to cause
brain injury in her fetus, but not the premature birth that was long believed to be linked with such neurologic damage in both rodents
and humans, new Johns Hopkins - led research suggests.
In the
brain, his FFI
mice develop neuronal loss in the thalamus
and his CJD
mice experience spongiosis in the hippocampus
and the cerebellum, reflecting the damage seen in the
brains of
human patients.
So he implanted various
human tumors — including ovarian, breast, colon, liver,
and brain — into
mice and then injected the animals with antibodies that disable CD47.
The investigators report that trapping virus - loaded stem cells in a gel
and applying them to tumors significantly improved survival in
mice with glioblastoma multiforme, the most common
brain tumor in
human adults
and also the most difficult to treat.
Several studies have supported a role for cancer stem cells in the aggressive
brain tumors called glioblastoma, but those studies involved inducing
human tumors to grow in
mice,
and as such their relevance to cancer in
humans has been questioned.
The summary of his experiment that Gage sent to the neuroscience meeting did not specify the size of the
human brain organoids he
and his colleagues implanted into
mice; he told STAT that he could not talk about the work because he had submitted it to a journal.
The loss of a single gene in
mice can affect social behavior
and impair their
brains» ability to filter out distractions — both characteristics of several neurological diseases in
humans.
That would be getting close to the number of cells in a
mouse brain,» raising the distant prospect of a
human brain organoid with cognitive
and even emotional capacities, all while sitting in a lab dish.
At a neuroscience meeting, two teams of researchers will report implanting
human brain organoids into the
brains of lab rats
and mice, raising the prospect that the organized, functional
human tissue could develop further within a rodent.
Further research showed that fetal
mice bred to lack these molecules — like animals lacking MHCI,
and like
humans with autism or schizophrenia — undergo inadequate synaptic pruning in some parts of their
brains.
Scientists have assumed these tunes are hardwired in their tiny
mouse brains and doubted that rodents modify their songs after hearing others — a cognitive feat similar to vocalizations by birds
and some mammals, including dolphins, bats
and humans.
While
mouse models have traditionally been used in studying the genetic disorder, Deng said the animal model is inadequate because the
human brain is more complicated,
and much of that complexity arises from astroglia cells, the star - shaped cells that play an important role in the physical structure of the
brain as well as in the transmission of nerve impulses.
In 2008, when he fed Lactobacillus to
mice with a transplanted
human microbiome, he observed metabolic changes in the animals» gut, liver, kidneys,
and parts of the
brain.
Meanwhile, a protein commonly found in the blood of young
mice (
and humans) may hold the key to rejuvenating
brain cells.
The normal
mice's
brain plaques seemed to be built from
human A-beta protein,
and the only source of that was the blood of the mutated partner
mouse.
The LPA receptor is expressed in the
brain of
human fetuses, just as in
mice,
and in the same types of neural progenitor cells.
Using the supercomputers at Almaden
and Lawrence Livermore National Laboratory, the group simulated networks that crudely approximated the
brains of
mice, rats, cats
and humans.
In a paper publishing August 7th in the Open Access journal PLOS Biology, researchers at the Max Planck Institute of Molecular Cell Biology
and Genetics (MPI - CBG) succeeded in mimicking the sustained expression of the transcription factor Pax6 as seen in the developing
human brain, in
mouse cortical progenitor cells.
«In
brain tissues of
mice and humans, there are two microRNAs called miR - 7
and miR - 671 that bind to it.»
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.
By assessing the survival of the cells that engulf the particles
and measuring the levels of red or green light that they emitted, the researchers determined which formulation of particles performed best, then tested that formulation in
mice with
human brain cancer derived from their patients.
But recent studies in both
humans and lab
mice have suggested that motor neurons in the
brain — the upper motor neurons — may be involved in disease progression, although the extent
and significance of this involvement has remained unknown.
They injected the particles directly into
mice with an experimental
human brain cancer,
and into the
brains of healthy
mice for use as comparison.
Since the current work was done in
mice, O'Leary
and Zembrzycki want to confirm the link in
humans by using
brain scans to measure the natural variation in the neocortical areas
and search for potential links to disease.
By pairing a receptor that targets neurons with a molecule that degrades the main component of Alzheimer's plaques, the biologists were able to substantially dissolve these plaques in
mice brains and human brain tissue, offering a potential mechanism for treating the debilitating disease, as well as other conditions that involve either the
brain or the eyes.
Studying
mouse communication
and behavior can produce great insight into
brain mechanics
and systems
and possibly give researchers valuable insight into how
human brains work.
Glioblastomas in lab dishes
and mouse brains are fakes, little Potemkin villages that everyone thought were faithful replicas of
human glioblastomas but which, lacking tumor stem cells, were nothing of the kind.
2 - D cell - culture
and mouse experiments also provided key evidence of the virus's modus operandi; although the rodent
brain doesn't harbor the full contingent of
human neural stem cells, it has blood vessels
and immune - system components that organoids lack.
The result, says Flajolet, is a
brain that is hard
and transparent, almost «like glass,» which allowed the researchers to see the amyloid plaques in full detail
and in 3D, in a full
mouse brain hemisphere, as well as in small blocks of
human brain tissue.
Buxbaum
and his coworkers point out that FOXP2 is also expressed in the
brains of songbirds such as finches
and canaries,
and further studies of the gene in
mice might provide a better understanding of its role in
human communication.
«Those findings also suggest that FGF21 is regulated the same way in
humans as in
mice and that the process involves the expression
and activation of certain proteins in the
brain.»