In a study of obese mice that received a diet rich in either coconut or safflower oil, mice that received the coconut oil were found to have made much less fat
cells than mice that received the safflower oil.
First, they found that the mice on a high - fat diet had many more intestinal stem
cells than mice on a normal diet.
Not exact matches
Yesterday's ruling effectively said that Feng Zhang's adoption of the technique in human and
mouse cells was, in fact, a new and patentable invention rather
than an «obvious» extension of Doudna's and Charpentier's work.
(The reason for growing the organ within a rat rather
than a
mouse was that the scientists needed to produce enough insulin - producing
cells to reverse diabetes» effects in
mice.)
In experiments with
mice, the researchers found that Paneth
cells engineered to lack a functional ATG16L1 gene were five times more likely to die in the face of rising TNF - alpha signals
than normal
cells.
Residual tumors, spawned from the remaining cancer
cells, were 3.5 times smaller in the treated
mice than in untreated
mice.
«We've been hearing about their potential for more
than a decade, but the results have always been in
mice and rats, and no one has shown they're safe or effective in humans long term,» says Robert Lanza of Advanced
Cell Technology in Marlborough, Massachusetts, the company that carried out the stem cell intervent
Cell Technology in Marlborough, Massachusetts, the company that carried out the stem
cell intervent
cell intervention.
In the latest research, described online this week in the journal
Cell Reports, Stelzer used the reporter system in
mice to discover that imprinted methylation in developing and adult tissues is actively regulated rather
than merely maintained in stable fashion.
Encouragingly, Hochedlinger's
cells do seem to be safer
than conventional
mouse iPS
cells.
Normal
mice saw benefits, too: Muscles and pancreas
cells healed better in middle - aged
mice that got rejuvenation treatments
than in
mice that did not.
The
mice produced more memory T -
cells, which kick in when bugs come back,
than mice not given the drug.
Like the Rosetta Stone that scholars used to decode hieroglyphics, researchers trained the algorithm with more
than 4,600 T
cell receptors and then used it to correctly assign 81 percent of the human T
cells and 78 percent of
mouse T
cells to one of 10 different viral epitopes.
The
mice treated with rapamycin also ended up with better quality memory T -
cells than the control
mice.
Despite the presumed virulence of the strain — experiments with
mouse lungs showed it produces 1000 times more bacteria in infected
cells than do standard varieties — Valway says the number of TB cases that developed were kept in line with other typical outbreaks, which «shows that doing good contact investigations is important and preventative therapy works.»
They're much more complex
than similar
cells in a
mouse.»
Base oxidation regulates gene activity In cooperation with colleagues at LMU, as well as researchers based in Berlin, Basel and Utrecht, Carell and his group have now shown, for the first time, that a standard base other
than cytosine is also modified in embryonic stem
cells of
mice.
When the huntingtin gene is deleted at an age older
than four months, these
mice appeared to stay healthy, despite having lost their huntingtin genes in
cells all over their bodies.
The brown
cells are new neurons, which are more numerous in active
mice than sedentary
mice, and the blue
cells are mature neurons.
The study «provided the surprising result that one new therapy currently being explored to lower insulin resistance promotes, rather
than decreases, the formation of bone in
mice,» says Darwin Prockop, a stem
cell researcher at Texas A&M College of Medicine in Temple, who was not involved in the work.
One, known as MIRA - 1, turned out to kill more
than cancer
cells: It was toxic in
mice.
In order to generate enough energy, the bone
cells in our
mice therefore take up much more glucose
than normal.»
Instead
mice injected with stem
cells developed a far greater number of synapses, or connections between neurons, at the damaged site
than control
mice did.
When injected with cancer
cells, animals housed there developed tumors 80 % smaller
than those in control
mice, or no tumors at all.
But a study of
mice shows that breast cancer
cells decamp in groups, and the clumps of
cells have a better chance of establishing a colony
than loners do, Kevin Cheung of Johns Hopkins University reported December 7 at the annual meeting of the American Society for
Cell Biology.
Fat tissue taken from
mice on a high - fat diet rich in omega - 3 fatty acids (right) has fewer inflammatory immune
cells (shown in green)
than fat tissue taken from
mice that did not receive the omega - 3 supplement (left).
Expression of CXCL16 was higher in the colon and lung tissue of GF
mice than in normal
mice, and blocking that expression reduced the numbers of iNKT
cells and the amount of inflammation in those tissues.
The researchers also tested a Runx2 knock - down variant of a human multiple myeloma
cell line and found that it produced significantly less tumor growth in immunodeficient
mice than the original human multiple myeloma
cells.
And because
mouse embryo
cells with inactivated copies of BRCA2 are more sensitive to ionizing radiation
than normal
cells are, «it's a reasonable extrapolation» that breast cancers with mutated copies of the gene may be especially good candidates for radiation therapy.
BYE BYE BUDS
Mice that became obese on a high - fat diet (right) lost a quarter of their taste buds (stained red) and also had fewer progenitor cells (stained green)-- which give rise to new taste buds — than mice of a healthy weight on a regular diet (le
Mice that became obese on a high - fat diet (right) lost a quarter of their taste buds (stained red) and also had fewer progenitor
cells (stained green)-- which give rise to new taste buds —
than mice of a healthy weight on a regular diet (le
mice of a healthy weight on a regular diet (left).
In both
cell cultures and
mice, these mineralized viruses proved to be significantly more infectious — and deadly —
than the native viruses.
Compared with earlier methods to tweak the genomes of bacteria, plants, laboratory
mice and human
cells, the Crispr - Cas9 gene - editing method is fast, precise and cheap, an order of magnitude better
than the others.
Their embryos had more profound defects
than were seen in the Esrp1 - null
mice, including craniofacial and forelimb defects, and the complete absence of lungs and salivary glands — two organs made up largely of epithelial
cells.
Initial tests on
mice showed the hybrid virus was very efficient: the gene it carried was active in 24 per cent of airway
cells after two months, a far better proportion
than achieved by other delivery methods (New Scientist, 10 March 2001, p 19).
In a
mouse model of triple - negative breast cancer,
mice injected with cancer
cells that over-express ZMYND11 had tumor volumes of less
than 50 cubic millimeters while control
mice and those injected with
cells expressing ZMYND11 deficient for binding to the methyl group had tumor volumes ranging from 150 to 400 cubic millimeters at eight weeks.
The researchers found that mutant
mice lacking Del - 1 had more severe attacks of the EAE
than normal
mice, with more damage to myelin, the fatty sheath that coats neurons and helps in the transmission of signals along the
cell.
Moreover,
mice engineered to generate smaller
than normal quantities of SIRT1 carried relatively little fat in their blood, indicating that their
cells hung onto it.
These organoids had more stem
cells than those isolated from wild - type
mice.
Stem
cells harvested from embryos rather
than adults remain the most powerful for cloning and other purposes; Yang's team showed that cloning from such
cells succeeded in 49 percent of attempts and led to 18
mouse pups.
For example, they succeeded in inserting a gene into a predefined position in the genome (knock - in) in more
than 60 per cent of all manipulated
mouse cells.
In a boost for a controversial theory of aging,
mice engineered to make a human protein that sponges up
cell - damaging molecules live 19 % longer
than other
mice.
«In a single dose, APC - mimetic scaffolds led to two - to ten-fold greater expansion of primary
mouse and human T
cells than Dynabeads.
An APC - mimetic scaffold that was engineered to activate a specific type of CAR - T
cell was able to generate higher numbers of the modified T
cells over longer periods of culture
than analogously designed expansion beads, and the resulting
cells were similarly effective in killing the lymphoma
cells in the
mice.
Philip Laipis of the University of Florida, who has also observed tumors in AAV vector - treated
mice, agrees, at least for studies using a similarly high dose of AAV to target liver
cells, which are more likely
than other
cell types to take up the AAV vector.
The analysis found the
mice that were exposed to BPA had a significant decrease in beta
cell mass and lower levels of insulin secretion
than the control animals.
The experiments also left white blood
cells cancer free for more
than 30 weeks in live
mice.
In humans, as in
mice, fat
cells of the obese already produced plenty of leptin — more in fact
than those of their thin counterparts, since the level of leptin was directly proportional to the amount of fat.
However,
mice lacking Ggamma13 in their olfactory
cells required more
than 8 minutes to perform the same task.
«Simply by counting
cell types, we immediately saw that there were more Tregs in the older
mice with diabetes
than any other group.»
«Stem
cells function far differently in
mice than in monkeys,» says biologist Shoukhrat Mitalipov, a senior scientist in the Division of Reproductive and Developmental Sciences at Oregon National Primate Research Center and lead author of the monkey study.
Previous attempts to do the same in monkeys, however, have failed — a disappointment because monkeys are more similar
than mice to humans, and thus likely a better harbinger of how stem
cell treatments will fare in people.