748 research outputs found
The Mechanism of Radiosensitization by YM155, a Novel Small Molecule Inhibitor of Survivin Expression, is Associated with DNA Damage Repair
Compound dark tea ameliorates obesity and hepatic steatosis and modulates the gut microbiota in mice
Dark tea is a fermented tea that plays a role in regulating the homeostasis of intestinal microorganisms. Previous studies have found that dark tea can improve obesity and has a lipid-lowering effect. In this study, green tea, Ilex latifolia Thunb (kuding tea) and Momordica grosvenori (Luo Han Guo) were added to a new compound dark tea (CDT), to improve the taste and health of this beverage. High-fat diet-fed C57BL/6J mice were treated with low- (6 mg/mL) or high- (12 mg/mL) concentrations of CDT for 18 weeks to assess their effect on lipid metabolism. Our results suggest that low- and high-concentrations of CDT could reduce body weight by 15 and 16% and by 44 and 38% of body fat, respectively, by attenuating body weight gain and fat accumulation, improving glucose tolerance, alleviating metabolic endotoxemia, and regulating the mRNA expression levels of lipid metabolism-related genes. In addition, low concentrations of CDT were able to reduce the abundance of Desulfovibrio, which is positively associated with obesity, and increase the abundance of Ruminococcus, which are negatively associated with obesity. This study demonstrates the effect of CDT on ameliorating lipid metabolism and provides new insights into the research and development of functional tea beverages
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Somatic SF3B1 hotspot mutation in prolactinomas.
The genetic basis and corresponding clinical relevance of prolactinomas remain poorly understood. Here, we perform whole genome sequencing (WGS) on 21 patients with prolactinomas to detect somatic mutations and then validate the mutations with digital polymerase chain reaction (PCR) analysis of tissue samples from 227 prolactinomas. We identify the same hotspot somatic mutation in splicing factor 3 subunit B1 (SF3B1R625H) in 19.8% of prolactinomas. These patients with mutant prolactinomas display higher prolactin (PRL) levels (p = 0.02) and shorter progression-free survival (PFS) (p = 0.02) compared to patients without the mutation. Moreover, we identify that the SF3B1R625H mutation causes aberrant splicing of estrogen related receptor gamma (ESRRG), which results in stronger binding of pituitary-specific positive transcription factor 1 (Pit-1), leading to excessive PRL secretion. Thus our study validates an important mutation and elucidates a potential mechanism underlying the pathogenesis of prolactinomas that may lead to the development of targeted therapeutics
Search for the decay
We search for radiative decays into a weakly interacting neutral
particle, namely an invisible particle, using the produced through the
process in a data sample of
decays collected by the BESIII detector
at BEPCII. No significant signal is observed. Using a modified frequentist
method, upper limits on the branching fractions are set under different
assumptions of invisible particle masses up to 1.2 . The upper limit corresponding to an invisible particle with zero mass
is 7.0 at the 90\% confidence level
Search for - oscillations in the decay
We report the first search for -- oscillations in the
decay by analyzing
events accumulated with the BESIII detector at the BEPCII collider.
The events are produced using collisions at a center of mass
energy ~GeV. No evidence for hyperon oscillations is observed.
The upper limit for the oscillation rate of to hyperons
is determined to be corresponding to an oscillation
parameter of less than ~GeV
at the 90\% confidence level.Comment: 7 pages, 1 figur
Amplitude analysis of
Utilizing the data set corresponding to an integrated luminosity of
fb collected by the BESIII detector at a center-of-mass energy of 4.178
GeV, we perform an amplitude analysis of the decay.
The sample contains 13,797 candidates with a signal purity of 80%. The
amplitude and phase of the contributing wave are measured
based on a quasi-model-independent approach, along with the amplitudes and
phases of the and waves parametrized by Breit-Wigner
models. The fit fractions of different intermediate decay channels are also
reported.Comment: 14 pages, 6 figure
Observation of decays to and
Using a data sample of events collected with
the BESIII detector, we report the first observation of the four-lepton-decays
and utilizing the process
. The branching fractions are determined to be
and
, respectively. The
results deviate from theoretical predictions, by 2.8 and 5.2 ,
respectively. No significant signal is observed for , and an upper limit on the branching fraction is set at
at the 90 confidence level. A CP asymmetry observable
is constructed for the first two channels, which is measured to be
and , respectively. No
evidence for CP violation is observed in this process.Comment: 9 pages, 1 figur
Amplitude analysis and branching fraction measurement of the decay \boldmath
The singly Cabibbo-suppressed decay
is observed, using a data set corresponding to an integrated luminosity of 6.32
recorded by the BESIII detector at the centre-of-mass energies
between 4.178 and 4.226 GeV. The first amplitude analysis of reveals the sub-structures in this decay and
determines the fractions and relative phases of different intermediate
processes. The dominant intermediate process is , with
a fit fraction of . With the
detection efficiency based on our amplitude analysis, the absolute branching
fraction for is measured to be
Observation of the and evidence for a new vector charmonium-like state in
Cross sections for the process
at center-of-mass energies from to GeV are measured using data
samples with a total integrated luminosity of 21.2 fb collected by the
BESIII detector operating at the BEPCII storage ring. The state is
observed in the energy dependence of the cross section for the first time with a statistical significance of
26.0. In addition, an enhancement around GeV, called the
, is seen with a statistical significance of 4.2. There is no
clear structure around GeV. Using a fit with a coherent sum of three
Breit-Wigner functions, we determine the mass and width of the state
to be MeV/ and MeV,
respectively, and the mass and width of the state to be MeV/ and MeV, respectively,
where the first uncertainties are statistical and the second are systematic. In
addition, the average Born cross section ratio of to is measured to be
, or if
three-body phase space is considered.Comment: Update draft based the comments from PRD refere
Observation of
By analyzing events collected with the
BESIII detector operating at the BEPCII collider, the decays of (, 1 and 2) are observed for the first time with
statistical significances of , , and ,
respectively. The product branching fractions of
and are measured. Dividing by the world
averages of the branching fractions of , the
branching fractions of decays are
determined to be ,
, and
for , 1 and 2, respectively, where the first uncertainties are statistical
and the second systematic.Comment: 9 pages, 4 figure
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