2,437 research outputs found
LHX1 as a potential biomarker regulates EMT induction and cellular behaviors in uterine corpus endometrial carcinoma
Objectives: To investigate the expression of LHX1 and its role as a biomarker in the diagnosis and prognosis of Uterine Corpus Endometrial Carcinoma (UCEC).
Methods: The Cancer Genome Atlas (TCGA) database was used to detect the expression level of LHX1 in UCEC cells and tissues, and to find out the effect of LHX1 on prognosis. Co-expressed genes were then identified by Spearman correlation analysis, and the protein-protein interaction network was constructed using Cytoscape software. The R “clusterProfiler” package was used to conduct Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses. A series of in vitro experiments were performed to evaluate LHX1 expression and detect UCEC cell proliferation, invasion, and migration. Western blotting was used to determine the effect of LHX1 on expression levels of Epithelial-Mesenchymal Transition (EMT)-related proteins.
Results: LHX1 was upregulated in UCEC tissues and correlated with poor overall survival and disease-specific survival outcomes. Functional enrichment analysis suggested that genes co-expressed with LHX1 were enriched in cell adhesion. The expression of LHX1 was positively correlated with the expression levels of genes related to EMT induction and invasion. LHX1 can enhance the proliferation, migration, and invasion activities of UCEC cells in vitro, and alter the expression levels of EMT-related proteins.
Conclusion: LHX1 expression was highly upregulated in UCEC cells and tissues, which was correlated with the prognosis of patients with UCEC. LHX1 may regulate UCEC progression at least in part by modulating EMT induction
Phenomenological analysis of the quasi-two-body decays in PQCD Approach
The quasi-two-body decays are calculated in PQCD
approach based on the factorization by introducing the wave functions of
pair associated with the resonances , and
. The results show that most branching fractions are at the order
of or even smaller. However, for decays
enhanced by the CKM element , their branching fractions are at the
order of , which are measurable in the current ongoing experiments.
Based on the narrow-width-approximation we also extract the branching fractions
of the corresponding two-body decays and the results are in good
agreement with previous predictions. Because these decays are only governed by
the tree operators, there are no asymmetries in these decays in the
standard model.Comment: 15 pages, 1 figur
Manipulation of magnetic anisotropy of 2D magnetized graphene by ferroelectric InSe
The capacity to externally manipulate magnetic properties is highly desired
from both fundamental and technological perspectives, particularly in the
development of magnetoelectronics and spintronics devices. Here, using
first-principles calculations, we have demonstrated the ability of controlling
the magnetism of magnetized graphene monolayers by interfacing them with a
two-dimensional ferroelectric material. When the 3 transition metal (TM) is
adsorbed on the graphene monolayer, its magnetization easy axis can be flipped
from in-plane to out-of-plane by the ferroelectric polarization reversal of
InSe, and the magnetocrystalline anisotropy energy (MAE) can be high to
-0.692 meV/atom when adopting the Fe atom at bridge site with downward
polarization. This may be a universal method since the 3 TM-adsorbed
graphene has a very small MAE, which can be easily manipulated by the
ferroelectric polarization. As a result, the inherent mechanism is analyzed by
second variation method.Comment: 17 pages, 10 figures in main tex
A face annotation framework with partial clustering and interactive labeling
Face annotation technology is important for a photo management system. In this paper, we propose a novel interactive face annotation framework combining unsupervised and interactive learning. There are two main contributions in our framework. In the unsupervised stage, a partial clustering algorithm is proposed to find the most evident clusters instead of grouping all instances into clusters, which leads to a good initial labeling for later user interaction. In the interactive stage, an efficient labeling procedure based on minimization of both global system uncertainty and estimated number of user operations is proposed to reduce user interaction as much as possible. Experimental results show that the proposed annotation framework can significantly reduce the face annotation workload and is superior to existing solutions in the literature. 1
Analysis of CKM-Favored Quasi-Two-Body Decays in PQCD Approach
LHCb Collaboration studied the resonant structure of decays using the Dalitz plot analysis technique, based
on a data sample corresponding to an integrated luminosity of of collision. The components have been analyzed in
the amplitude model, where the decay amplitude is modeled to be the resonant
contributions with respect to the intermediate resonances ,
and . Motivated by the experimental results, we
investigate the color-favored quasi-two-body decays
in the framework of the perturbative QCD (PQCD) approach. We calculate the the
branching fractions by introducing the appropriate wave functions of
pair. Our results are in agreement well the available data, and others can be
tested in LHCb and Belle-II experiments. Using the narrow-width-approximation,
we also extract the branching fractions of the corresponding two-body decays, which agree to the previous theoretical calculations and
the experimental data within the errors. There are no asymmetries in these
decays in the standard model, because these decays are all governed by only the
tree operators.Comment: 18 pages, 1 figure
Preparation and Properties of Fe3O4 Biomimetic Micro-nano Structure Coatings
Nanoparticles filling is one of the most effective methods to build the micro-nano structure. In this paper, the composite coatings containing Fe3O4 nanoparticles were prepared from fluorinated silicon polymer by in-situ polymerization. FT-IR was used to characterize the structure of the composite material. SEM and AFM were performed to observe the microstructure of the coatings. The contact angle of water and coatings was tested. The results showed that the biomimetic micro-nano structure of the coatings, which formed on the glass plate, was exactly familiar with that of the surface of lotus leaves. Keyword: micro-nano structure; Fe3O4 nanoparticles; in-situ polymerization; biomimeti
Role of hepatitis B surface antigen in the development of hepatocellular carcinoma: regulation of lymphoid enhancer-binding factor 1
<p>Abstract</p> <p>Background</p> <p>There are around 350 million of hepatitis B surface antigen (HBsAg) carriers worldwide, and among them, high risk of developing hepatocellular carcinoma (HCC) has been identified by epidemiological studies. To date, the molecular role of HBsAg in HCC development has not been fully studied. We have previously reported that in cell cultures, HBsAg up-regulated the expression of lymphoid enhancer-binding factor 1 (LEF-1), a key component of the <it>Wnt </it>pathway. In this study we aimed to study this effect of HBsAg on LEF-1 in the development of HCC.</p> <p>Methods</p> <p>Expression of HBsAg, LEF-1 and its downstream effector genes were compared among 30 HCCs, their peritumor tissue counterparts and 9 normal control liver tissues by quantitative real-time PCR. In addition, immunohistochemical staining studies on HBsAg and LEF-1 expression were conducted among these samples.</p> <p>Results</p> <p>The expression of LEF-1 was compared between 13 HBsAg positive HCC tissues and 17 HBsAg negative HCC tissues. Simultaneous detection of LEF-1 and HBsAg was observed in HBsAg positive HCC tissues and, additionally, the simultaneous detection of HBsAg and LEF-1 was more pronounced in peritumor tissues, compared to that in the tumor tissues. The distribution of cellular LEF-1 in peritumor tissues was predominantly in the cytoplasm; while LEF-1 in the tumor tissues was located either exclusively in the nucleus or both in the nucleus and cytoplasm. By real-time PCR, the expression levels of LEF-1 downstream effector genes <it>cyclin D1 </it>and <it>c-myc </it>were higher in peritumor cells compared to that of the tumor cells. However, a 38 kDa truncated isoform of LEF-1, rather than the 55 kDa wild-type LEF-1, was significantly elevated in the HBsAg positive tumor cells.</p> <p>Conclusion</p> <p>Data indicate that deregulation of the <it>Wnt </it>pathway by HBsAg occurred in HBV-associated HCCs, but was more pronounced in the peritumor cells. It is speculated that HBsAg could stimulate proliferation and functional modification of hepatocytes via LEF-1 through the <it>Wnt </it>pathway at the pre-malignant stage.</p
Towards Better Entity Linking with Multi-View Enhanced Distillation
Dense retrieval is widely used for entity linking to retrieve entities from
large-scale knowledge bases. Mainstream techniques are based on a dual-encoder
framework, which encodes mentions and entities independently and calculates
their relevances via rough interaction metrics, resulting in difficulty in
explicitly modeling multiple mention-relevant parts within entities to match
divergent mentions. Aiming at learning entity representations that can match
divergent mentions, this paper proposes a Multi-View Enhanced Distillation
(MVD) framework, which can effectively transfer knowledge of multiple
fine-grained and mention-relevant parts within entities from cross-encoders to
dual-encoders. Each entity is split into multiple views to avoid irrelevant
information being over-squashed into the mention-relevant view. We further
design cross-alignment and self-alignment mechanisms for this framework to
facilitate fine-grained knowledge distillation from the teacher model to the
student model. Meanwhile, we reserve a global-view that embeds the entity as a
whole to prevent dispersal of uniform information. Experiments show our method
achieves state-of-the-art performance on several entity linking benchmarks.Comment: Accepted by ACL 2023 Main Conferenc
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