1,792 research outputs found
3,5-Dimethyl-1H-pyrazole–2-hydroxy-5-(phenyldiazenyl)benzoic acid (1/1)
There are two independent 3,5-dimethylpyrazole and two independent 2-hydroxy-5-(phenyldiazenyl)benzoic acid molecules [in which intramolecular O—H⋯O bonds form S(6) graph-set motifs] in the asymmetric unit of the title compound, C5H8N2·C13H10N2O3. In the crystal, the components are linked by intermolecular O—H⋯O, O—H⋯N and N—H⋯O hydrogen bonds, forming four-component clusters. Further stabilization is provided by weak C—H⋯π interactions
Up-regulation of microRNA-183 reduces FOXO1 expression in gastric cancer patients with Helicobacter pylori infection
The aim of the study is to detect the
expression of FOXO1 mRNA and protein in samples
from gastric cancer patients with Helicobacter pylori (H.
pylori) infection, and to investigate the relationship
between FOXO1 expression and miR-183 expression.
Twenty-six gastric cancer patients with H. pylori
infection and 26 gastric cancer patients without H. pylori
infection were included into experimental group and
control group, respectively. Tumor tissues and peripheral
blood were collected from all subjects. QRT-PCR was
used to determine the expression of miRNA and mRNA.
Western blotting was carried out to measure protein
expression. Dual luciferase reporter assay was used to
identify direct interaction between miRNA and 3’-UTR
of mRNA. Cell proliferation was examined by CCK-8
assay. FOXO1 mRNA and protein expression was downregulated in gastric cancer patients, being possibly
related to H. pylori infection. The expression of miR-183
in tumor tissues and serum from gastric cancer patients
with H. pylori infection was elevated, and probably
regulated the expression of FOXO1 by direct targeting.
Stimulation by H. pylori up-regulated the expression of
miR-183 in gastric cancer AGS cells, and reduced the
levels of FOXO1 mRNA and protein. Inhibition of miR183 elevated the expression of FOXO1 and suppressed
the proliferation of AGS cells. The present study
demonstrates that the expression of FOXO1 in tumor
tissues and blood from gastric cancer patients with H.
pylori infection is significantly down-regulated, and may
be related to the up-regulation of miR-183. H. pylori
may regulate FOXO1 expression through miR-183 to
affect the pathological process of gastric cancer
Gas kinematics and star formation in the filamentary molecular cloud G47.06+0.26
We performed a multi-wavelength study toward the filamentary cloud
G47.06+0.26 to investigate the gas kinematics and star formation. We present
the 12CO (J=1-0), 13CO (J=1-0) and C18O (J=1-0) observations of G47.06+0.26
obtained with the Purple Mountain Observation (PMO) 13.7 m radio telescope to
investigate the detailed kinematics of the filament. The 12CO (J=1-0) and 13CO
(J=1-0) emission of G47.06+0.26 appear to show a filamentary structure. The
filament extends about 45 arcmin (58.1 pc) along the east-west direction. The
mean width is about 6.8 pc, as traced by the 13CO (J=1-0) emission. G47.06+0.26
has a linear mass density of about 361.5 Msun/pc. The external pressure (due to
neighboring bubbles and H II regions) may help preventing the filament from
dispersing under the effects of turbulence. From the velocity-field map, we
discern a velocity gradient perpendicular to G47.06+0.26. From the Bolocam
Galactic Plane Survey (BGPS) catalog, we found nine BGPS sources in
G47.06+0.26, that appear to these sources have sufficient mass to form massive
stars. We obtained that the clump formation efficiency (CFE) is about 18% in
the filament. Four infrared bubbles were found to be located in, and adjacent
to, G47.06+0.26. Particularly, infrared bubble N98 shows a cometary structure.
CO molecular gas adjacent to N98 also shows a very intense emission. H II
regions associated with infrared bubbles can inject the energy to surrounding
gas. We calculated the kinetic energy, ionization energy, and thermal energy of
two H II regions in G47.06+0.26. From the GLIMPSE I catalog, we selected some
Class I sources with an age of about 100000 yr, which are clustered along the
filament. The feedback from the H II regions may cause the formation of a new
generation of stars in filament G47.06+0.26.Comment: 10 pages, 11 figures, accepted for publication in A&
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