4,517 research outputs found
Correlation between periostin and SNCG and esophageal cancer invasion, infiltration and apoptosis
AbstractObjectiveTo investigate the correlation between periostin and SNCG and esophageal cancer invasion, infiltration and apoptosis.MethodsA total of 78 cases esophageal surgical resection specimens were collected, expression of periostin and SNCG in esophageal cancer were detected. Effect of periostin and SNCG in esophageal carcinoma invasion and infiltration was analyzed.ResultsThe upregulated rate of periostin had significant difference in esophageal cancer tissues (39.74%), adjacent tissues (17.86%) and normal tissues (0.00%); The positive expression rates of SNCG had significant difference in esophageal cancer tissues (61.54%), adjacent tissues (32.14%) and normal tissues (1.96%); The upregulated rate of periostin had a significant correlation with lymph node metastasis, adventitia invasion, TNM stage; The positive expression rates of SNCG had a significant correlation with differentiation degree, lymph node metastasis, adventitia invasion, TNM stage; Apoptosis index of the positive of expression of SNCG of esophageal cancer tissue (4.541±2.267) was significantly lower than that of the negative expression (7.316±2.582) (P<0.05).ConclusionsSNCG may play an important role in invasion, infiltration and apoptosis of esophageal cancer and serve as target spots in the targeted therapy of esophageal cancer
Braiding higher-order Majorana corner states through their spin degree of freedom
In this work, we study the spin texture of a class of higher-order
topological superconductors (HOTSC) and show how it can be used to detect and
braid Majorana corner modes (MCMs). This class of HOTSC is composed of
two-dimensional topological insulators with s-wave superconductivity and
in-plane magnetic fields, which offers advantages in experimental
implementation. The spin polarization of the MCMs in this class is
perpendicular with the applied magnetic field direction and is opposite on
intrinsic orbitals, resulting in an overall ferrimagnetic spin texture. As a
result, we find that the spin-selective Andreev reflection can be observed in a
transverse instead of parallel direction to the applied magnetic field.
Meanwhile, this spin texture leads to the gate-tunable periodic
Josephson current that performs qualitatively different behavior from the
topologically trivial -junction under rotating the in-plane magnetic
field. Meanwhile, the existence of the MCMs in this class does not depend on
the in-plane magnetic field direction. This gives rise to great advantage in
constructing all electronically controlled Majorana network for braiding, which
is confirmed through our numerical simulation. We thus provide a comprehensive
scheme for probing non-Abelian statistics in this class of HOTSCs.Comment: 6 pages, 4 figure
Recommended from our members
Modulating Linker Composition of Haptens Resulted in Improved Immunoassay for Histamine.
Histamine (HA) is an important food contaminant generated during food fermentation or spoilage. However, an immunoassay for direct (derivatization free) determination of HA has rarely been reported due to its small size to induce the desired antibodies by its current hapten-protein conjugates. In this work, despite violating the classical hapten design criteria which recommend introducing a linear aliphatic (phenyl free) linker into the immunizing hapten, a novel haptens, HA-245 designed and synthesized with a phenyl-contained linker, exhibited significantly enhanced immunological properties. Thus, a quality-improved monoclonal antibody (Mab) against HA was elicited by its hapten-carrier conjugates. Then, as the linear aliphatic linker contained haptens, Hapten B was used as linker-heterologous coating haptens to eliminate the recognition of linker antibodies. Indirect competitive ELISA (ic-ELISA) was developed with a 50% inhibition concentration (IC50) of 0.21 mg/L and a limit of detection (LOD) of 0.06 mg/L in buffer solution. The average recoveries of HA from spiked food samples for this ic-ELISA ranged from 84.1% and 108.5%, and the analysis results agreed well with those of referenced LC-MS/MS. This investigation not only realized derivatization-free immunoassay for HA, but also provided a valuable guidance for hapten design and development of immunoassay for small molecules
Gene and Pathway-Based Analysis: Second Wave of Genome-wide Association Studies
Despite great success of GWAS in identification of common genetic variants associated with complex diseases, the current GWAS have focused on single SNP analysis. However, single SNP analysis often identifies a number of the most significant SNPs that account for only a small proportion of the genetic variants and offers limited understanding of complex diseases. To overcome these limitations, we propose gene and pathway-based association analysis as a new paradigm for GWAS. As a proof of concept, we performed a comprehensive gene and pathway-based association analysis for thirteen published GWAS. Our results showed that the proposed new paradigm for GWAS not only identified the genes that include significant SNPs found by single SNP analysis, but also detected new genes in which each single SNP conferred small disease risk, but their joint actions were implicated in the development of diseases. The results also demonstrated that the new paradigm for GWAS was able to identify biologically meaningful pathways associated with the diseases which were confirmed by gene-set rich analysis using gene expression data
An Efficient Decomposition Algorithm for Large-Scale Network Slicing
In this paper, we consider the network slicing (NS) problem which attempts to
map multiple customized virtual network requests to a common shared network
infrastructure and allocate network resources to meet diverse service
requirements. We propose an efficient decomposition algorithm for solving this
NP-hard problem. The proposed algorithm decomposes the large-scale hard NS
problem into two relatively easy function placement (FP) and traffic routing
(TR) subproblems and iteratively solves them enabling information feedback
between each other, which makes it particularly suitable to solve large-scale
problems. Specifically, the FP subproblem is to place service functions into
cloud nodes in the network, and solving it can return a function placement
strategy based on which the TR subproblem is defined; and the TR subproblem is
to find paths connecting two nodes hosting two adjacent functions in the
network, and solving it can either verify that the solution of the FP
subproblem is an optimal solution of the original problem, or return a valid
inequality to the FP subproblem that cuts off the current infeasible solution.
The proposed algorithm is guaranteed to find the global solution of the NS
problem. We demonstrate the effectiveness and efficiency of the proposed
algorithm via numerical experiments.Comment: 5 pages, 4 figures, accepted for publication in IEEE SPAWC 202
- …