Not exact matches
When the group stopped the
gene working
in mice, the animals no longer developed diabetes if fed a high -
fat diet.
By combining each
mouse's genome, phenome, proteome and metabolome, the scientists were able to identify a particular
gene, located on their chromosome 2, and whose presence plays an important role
in the development of type 2 diabetes «The
mice with a high -
fat diet are more or less likely to develop diabetes depending on whether this
gene is active or not,» said Evan Williams, LISP PhD student and the article's co-first author.
They started with pairs of
fat yellow
mice known to scientists as agouti
mice, so called because they carry a particular
gene — the agouti
gene — that
in addition to making the rodents ravenous and yellow renders them prone to cancer and diabetes.
And by studying
mice lacking the
gene for ERRγ (and therefore unable to make the ERRy molecule), the team observed that all brown
fat cells resembled white cells
in these
mice.
Knocking out a particular
gene in muscle lets
mice run twice as far as normal; knocking out the same
gene in fat cells allows the animals to put on weight without developing type - 2 diabetes.
Lazar, co-first author Matthew Emmett, an MD / PhD student
in his lab, and their IDOM colleagues found that
mice lacking HDAC3
in their brown
fat were unable to turn on the UCP1
gene and were just as susceptible to the deleterious effects of cold as
mice that did not have the
gene.
A single
gene appears to play a crucial role
in coordinating the immune system and metabolism, and deleting the
gene in mice reduces body
fat and extends lifespan, according to new research by scientists at the Jean Mayer USDA Human Nutrition Research Center (USDA HNRCA) on Aging at Tufts University and Yale University School of Medicine.
In mice that gorged and then fasted, the researchers saw elevations in inflammation, higher activation of genes that promote storage of fatty molecules and plumper fat cells — especially in the abdominal area — compared to the mice that nibbled all da
In mice that gorged and then fasted, the researchers saw elevations
in inflammation, higher activation of genes that promote storage of fatty molecules and plumper fat cells — especially in the abdominal area — compared to the mice that nibbled all da
in inflammation, higher activation of
genes that promote storage of fatty molecules and plumper
fat cells — especially
in the abdominal area — compared to the mice that nibbled all da
in the abdominal area — compared to the
mice that nibbled all day.
«Turning off the
FAT10
gene produces a variety of beneficial effects
in the
mice, including reduced body
fat, which slows down aging and extends lifespan by 20 percent.»
In 1994 scientists discovered that
mice missing both copies of their leptin
gene develop excessive body
fat, extreme hunger, and sterility.
«Deletion of
FAT10
gene reduces body
fat, slows down aging
in mice.»
Intrigued, Turek joined with endocrinologist Joseph Bass, also at Northwestern, to study the effects of regular and high -
fat diets
in normal
mice and
mice with a dysfunctional Clock
gene.
To investigate, Akhtar deleted the
gene for Rac1
in female
mice; their first litter of pups survived, but they were smaller than normal — probably because the milk they received contained less
fat and protein than normal.
Associate Professor Amanda Sainsbury - Salis expressed surprise at the impact of the Y6
gene deletion on
mice, commenting «I find it amazing that one
gene, which is expressed
in the small part of the brain that controls the body clock, has such a profound impact on how much
fat is stored on the body, and how much lean tissue is maintained.»
He and a colleague took samples of both visceral and subcutaneous
fat from the
mice and, using
gene chips, identified the
genes in the
fat cells as well as
in precursor
fat cells.
In mouse studies, inhibition of this
gene's protein has been shown to have anti-atherosclerotic, i.e., helps fight thickening and hardening with
fat on the inside of arteries and anti-diabetic effects.
Among the 20,000
mouse genes, the researchers found 200 that were different
in the two
fat depots.
This
gene therapy resulted
in high -
fat diet
mice having a reduced body weight, building up less
fat, expending more energy, and showing evidence of improved leptin - signalling.
In other research, a knockout of the gene that encodes one type of lncRNA in mice conferred some resistance to obesity caused by a high - fat die
In other research, a knockout of the
gene that encodes one type of lncRNA
in mice conferred some resistance to obesity caused by a high - fat die
in mice conferred some resistance to obesity caused by a high -
fat diet.
Working
in mice that were put on high -
fat diets to model diabetes, «we demonstrated that obesity increases the expression of pro-inflammatory
genes in abdominal
fat, but not
in other organs such as the liver or muscle, nor
in subcutaneous
fat,» says Jongsoon Lee, PhD, Assistant Investigator
in Joslin's Section on Pathophysiology and Molecular Pharmacology and Assistant Professor of Medicine at Harvard Medical School.
Aiming ultimately to make healthier beef, eggs, and other farm products, scientists have used a worm
gene to genetically engineer
mice whose tissues are unusually rich
in the heart - healthy
fats found mainly
in fish.
With an eye toward shifting that balance, the scientists inserted into
mice a
gene called
fat - 1, which
in nematode worms produces an enzyme that converts omega - 6
fats into omega - 3
fats.
The study showed that
mice lacking the SNRK
gene had a significantly higher concentration of macrophages
in white
fat tissue compared with normal
mice.
In addition, mouse brown fat in the collar bone is morphologically similar to human brown fat in the same location, produces compounds involved in the production of heat and expresses genes similar to those expressed by human brown fat.&raqu
In addition,
mouse brown
fat in the collar bone is morphologically similar to human brown fat in the same location, produces compounds involved in the production of heat and expresses genes similar to those expressed by human brown fat.&raqu
in the collar bone is morphologically similar to human brown
fat in the same location, produces compounds involved in the production of heat and expresses genes similar to those expressed by human brown fat.&raqu
in the same location, produces compounds involved
in the production of heat and expresses genes similar to those expressed by human brown fat.&raqu
in the production of heat and expresses
genes similar to those expressed by human brown
fat.»
For this new study, the researchers bred
mice that lack the
gene for producing SNRK
in fat cells.
Many of the 19 mutations were
in genes that affect how
mice metabolize
fats and carbohydrates from food.
A
gene screen revealed a number of genetic changes
in the first (daughter) and third (great granddaughter) high -
fat mice generations, including several linked to increased breast cancer
in women, increased resistance to treatment, poor prognosis, and impaired anticancer immunity.
In mice, PGC - 1α is required for the expression of several mitochondrial genes in the liver, skeletal muscle, heart, brain, and brown fa
In mice, PGC - 1α is required for the expression of several mitochondrial
genes in the liver, skeletal muscle, heart, brain, and brown fa
in the liver, skeletal muscle, heart, brain, and brown
fat.
Furthermore, after genetic analysis of the bacteria's metabolism, they discovered that
genes responsible for
fat synthesis had greater levels of activity
in the treated
mice.
In the initial report, mice harboring a mutation in the core circadian gene Clock (termed Clock mutant mice) were fed a high - fat (HF) diet and observed to develop obesity at a young age, as well as a variety of metabolic and endocrine abnormalities consistent with the metabolic syndrome (2
In the initial report,
mice harboring a mutation
in the core circadian gene Clock (termed Clock mutant mice) were fed a high - fat (HF) diet and observed to develop obesity at a young age, as well as a variety of metabolic and endocrine abnormalities consistent with the metabolic syndrome (2
in the core circadian
gene Clock (termed Clock mutant
mice) were fed a high -
fat (HF) diet and observed to develop obesity at a young age, as well as a variety of metabolic and endocrine abnormalities consistent with the metabolic syndrome (2).
The reason for this response, Gordon says, was twofold: Firmicutes bacteria transplanted from the
fat mice produced more of the enzymes that helped the animals extract more energy from their food, and the bacteria also manipulated the
genes of the normal
mice in ways that triggered the storage of
fat rather than its breakdown for energy.