Publications by authors named "Jing-Chen Xu"

Although therapies based on direct-acting antivirals (DAAs) effectively eradicate hepatitis C virus (HCV) in patients, there is still a high risk of liver fibrosis even after a sustained virological response. Therefore, it is of great clinical importance to understand the mechanism of potential factors that promote liver fibrosis after virological cure by treatment with DAAs. Here, we found that tubulointerstitial nephritis antigen-like 1 (TINAGL1) is significantly increased in HCV-infected hepatocytes and in the liver of patients with liver fibrosis, and that higher TINAGL1 expression persists in HCV-eradicated hepatocytes after treatment with DAAs.

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  • The study investigates the antiviral properties of the herb Steud, traditionally used in Chinese medicine, focusing on its effectiveness against COVID-19, which has not been extensively studied.
  • Researchers successfully isolated nine new compounds from Steud, with one particular compound (Compound 1) showing significant antiviral activity by directly binding to the RNA-dependent RNA polymerase of the virus, crucial for its replication.
  • The findings enhance the understanding of the antiviral properties of Steud and suggest potential for using atisane-type diterpenoid compounds as new antiviral agents in the fight against COVID-19.
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  • MASLD is the most prevalent liver metabolic disease, marked by over 5% fat accumulation in liver cells, and new treatments are needed despite recent drug approvals like resmetirom.* -
  • A key discovery shows that higher levels of glutathione S-transferase alpha 1 (GSTA1) reduce fat buildup in liver cells and protect against fatty liver changes in both cells and mice.* -
  • GSTA1 works by interacting with another protein (FABP1) to help break down fatty acids, suggesting GSTA1 could be a promising target for developing new treatments for MASLD.*
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The COVID-19 pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is unprecedented in human history. As a major structural protein, nucleocapsid protein (NPro) is critical to the replication of SARS-CoV-2. In this work, 17 NPro-targeting phenanthridine derivatives were rationally designed and synthesized, based on the crystal structure of NPro.

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Objectives: This study aims to investigate awareness of oral health care and health status among elderly people in nursing homes in Taiyuan. Strategies for preventing and treating oral diseases and improving the quality of life of the elderly in nursing homes were formulated on the basis of analyzed data.

Methods: A total of 359 participants from 48 nursing homes in six districts were selected randomly.

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Porcine epidemic diarrhea virus (PEDV) has become increasingly problematic around the world, not only for its hazards to livestock but also due to the possibility that it is a zoonotic disease. Although vaccine therapy has made some progress toward PEDV control, additional effective therapeutic strategies against PEDV are needed, such as the development of chemotherapeutic agents. The aim of this work was to identify novel anti-PEDV agents by designing and synthesizing a series of phenanthridine derivatives.

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Aphananoid A, a limonoid which features a rare C appendage and new 5/6/5 fused-ring framework, was obtained from . The planar structure as well as the absolute configuration was identified based on extensive spectroscopic analysis and electronic circular dichroism calculations. The biogenetic pathway of aphananoid A was also speculated, which arises from the triterpene by the 3,4--7,8--6,8 -7,30- key pattern.

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Ethnopharmacological Relevance: Curcumin, a phenolic compound extracted from the rhizome of turmeric (Curcuma longa L.), has been reported to have broad biological functions including potent antioxidant and renoprotective effects. It has been reported that Curcumin has a certain protective effect on the kidney.

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Two new sesquiterpenoids were isolated from Stellera chamaejasme L., known as the traditional Chinese herb 'Rui Xiang Lang Du'. The compounds were elucidated as stelleraguaianone B (1) and C (2) by comprehensive spectroscopic analysis, including 1D and 2D NMR as well as HRESIMS, and by comparing their NMR data with known compounds.

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  • HLY78 is the first agonist that activates the Wnt/β-catenin signaling pathway by targeting the DAX domain of axin, but its weak effect limits its use in pharmacological studies.
  • Researchers optimized HLY78 by designing and synthesizing 36 new derivatives, some of which demonstrated stronger Wnt activity than the original compound.
  • One notable derivative significantly outperformed HLY78, showing 10 times greater potency, while the structure-activity relationship (SAR) analysis highlighted that a pyrazole group at the C-8 position and a specific methyl substitution at C-4 enhance Wnt activation, while oxidation at C-6 diminishes it.
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Lycorine is a benzylphenethylamine-type alkaloid member of the Amaryllidaceae family. A lycorine derivative, HLY78, was previously identified as a new Wnt/β-catenin signaling pathway agonist that targets the DAX domain of axin. Herein, the structural optimization of HLY78 and analyses of the structure-activity relationships of lycorine-derived phenanthridine derivatives as agonists of the Wnt/β-catenin signaling pathway are presented.

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