Publications by authors named "Wen-Xia Shi"

A molecular editing reaction for converting pyrrole rings into benzene rings through a sequential pathway of Diels-Alder and cheletropic reactions was developed. The nitrogen atom in a N-bridged intermediate is eliminated in the form of NO by a strain-releasing pathway, ultimately leading to the formation of substituted benzene and naphthalene derivatives.

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In this report, we present a photopromoted, metal-free transannulation of phenyl azides for the synthesis of DNA-encoded seven-membered rings. The transformation is efficiently achieved through a skeletal editing strategy targeting the benzene motif coupled with a Reversible Adsorption to Solid Support (RASS) strategy. A variety of valuable DNA-encoded seven-membered ring compounds, including DNA-encoded 3H-azepines, azepinones, and unnatural amino acids, are now accessible.

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The photocatalyst-free electron donor-acceptor (EDA) complex photochemistry was deemed to expand the potential of photodriven radical chemistry. Here, we report a cross-coupling reaction of thianthrenium salt functionalized arenes and sodium sulfinates via a photopromoted single electron transfer (SET) process of an EDA complex. A series of biarylsulfones were obtained with high site-selectivity and reactivity.

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Background: Interleukin-28B (IL28B) single nucleotide polymorphism (SNP) rs8099917 has been described to be associated with response to treatment with pegylated interferon and ribavirin (PEG-IFN/RBV) in patients with chronic hepatitis C from the North America, Europe, Asia countries like Japan and Taiwan. Whether this holds true for Chinese patients remains unknown.

Objectives: We aimed to study the effects of IL28B rs8099917 on antiviral therapy responses in Chinese patients with hepatitis C.

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In this study, the two-step PV method of immunohistochemistry was used to determine livin protein expression in HCC tissues, pericarcinoma tissues, hepatitis/hepatic cirrhosis tissues, and normal hepatic tissues, and livin protein expression was detected in the blood plasma of patients with HCC before and after surgery, subjects with hepatic cirrhosis and hepatitis, and healthy blood donors using ELISA. Livin protein expression was significantly higher in HCC tissues than that in normal hepatic tissues and hepatitis/hepatic cirrhosis tissues, with no significant difference between HCC tissues and pericarcinoma tissues. The HCC patients with positive livin protein expression had a significantly higher survival rate than those with negative livin protein expression.

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Objective: To investigate the correlation between IL-28B rs8099917 polymorphism and the outcome of HBV infection.

Methods: Genotype of rs8099917 (T > G) in IL-28B locus was determined by TaqMan SNP genotyping from 486 individuals which including 199 chronic HBV carriers (including 100 HBV-induced liver cirrhosis and 99 HBV-related HCC). 143 people with self-limited infection and 144 healthy people served as controls.

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Objective: To investigate the mechanisms that coagulation factor VIIa promotes proliferation and migration of a colon cancer cell line (SW620 cells) in vitro.

Methods: The expression of interleukin 8 (IL-8), tissue factor (TF), caspase-7 and p-p38 MAPK in SW620 cells treated with factor VIIa or protease activated receptor 2 agonist (PAR2-AP) was measured by ELISA, Western-blotting and QT-PCR.

Results: Factor VIIa and PAR2-AP induced IL-8 expression at both mRNA and protein levels, upregulated TF mRNA expression and TF activity, but down-regulated caspase-7 mRNA and p-p38 MAPK levels in SW620 cells.

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