Publications by authors named "X-G Chen"

The design and development of highly active non-noble metal electrocatalysts for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are crucial for metal-air batteries. In this work, the electrocatalytic performance of different -block metal (PM = Sn, Sb, Pb and Bi) atoms embedded in the g-CN monolayer (PM@g-CN, = 1-3) for the OER and ORR was systematically investigated by density functional theory (DFT). The strong interaction between PM atoms and g-CN substrates indicates the good stability of PM@g-CN catalysts.

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Prolonged and widespread use of pyrethroid pesticides a significant concern for human health. The initial step in pyrethroid bioremediation involves the hydrolysis of ester-bond. In the present study, the esterase genes est10 and est13, derived from Bacillus subtilis, were successfully cloned and expressed in Escherichia coli.

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The insatiable demand for lithium in portable energy storage necessitates a sustainable and low-carbon approach to its recovery. Conventional hydrometallurgical and pyrometallurgical methods heavily involve hazardous chemicals and significant CO emissions. Herein, by integrating electrode oxidation with electrolyte oxidation, we establish a photovoltaic-driven "dual-oxidation" seawater electrolyzer system for low-carbon footprint and high lithium recovery.

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Residual stress induced by solution treatment in 6061 aluminum alloy can lead to workpiece deformation, or even premature failure. The efficiency of traditional heat treatment for relieving residual stress is relatively low. Therefore, this study introduces a novel cryogenic treatment technique to reduce residual stress.

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  • The study aimed to explore how growth differentiation factor 9 (GDF9) affects androgen production in theca cells, which are related to ovarian function.
  • Researchers treated cultured human theca cells with GDF9, an ALK5 inhibitor, and a SMAD4 agonist to observe changes in gene expression related to androgen synthesis and related signaling pathways.
  • The results showed that GDF9 reduced the expression of key genes involved in androgen production and activated specific signaling pathways, indicating its role in suppressing androgen production in these cells.
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Background: Efgartigimod, a human immunoglobulin G (IgG)1-derived Fc fragment targeting the neonatal Fc receptor, has been developed into intravenous (IV) and subcutaneous (SC) formulations for treating generalized myasthenia gravis (gMG) and other autoimmune diseases. Data in the Chinese population were not available to date, and while both formulations have been approved in the USA, the EU, Japan and China for the treatment of gMG.

Objective: We present the pharmacokinetic, pharmacodynamic, and safety of IV and SC PH20 efgartigimod in healthy Chinese participants.

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Purpose: To investigate the progression patterns and risk factors of axial elongation in young adults with nonpathologic high myopia.

Design: Prospective, clinical observational cohort study with 2- to 4-year follow-up.

Methods: A total of 1043 eyes of 563 participants (3515 medical records) aged 18 to 50 years with nonpathologic high myopia (axial length [AL] ≥ 26 mm; myopic maculopathy < diffuse chorioretinal atrophy; without posterior staphyloma) were included from 1546 participants (6318 medical records).

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  • The evolution of SARS-CoV-2 variants highlights the need for multivalent vaccines, leading to the development of SCTV01E, a tetravalent COVID-19 vaccine targeting variants Alpha, Beta, Delta, and Omicron BA.1.
  • A double-blind placebo-controlled trial showed SCTV01E had a vaccine efficacy of 69.4% against COVID-19 seven days post-vaccination, with higher efficacy rates in preventing symptomatic and all infections at 14 days.
  • The vaccine demonstrated a significant neutralizing antibody response against Omicron BA.5 and had mild reactogenicity, indicating its potential effectiveness against emerging SARS-CoV-2 variants.
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  • The study evaluated how deep learning (DL) can automatically measure tumor size in MRI scans to predict early recurrence of hepatocellular carcinoma (HCC) after surgery.
  • It involved 592 patients who had liver tumor surgery, with results showing that total tumor burden (TTB) was the strongest indicator of early recurrence, differentiating risk levels among patients.
  • The findings suggest that using DL to analyze MRIs can help redefine patient classification, potentially leading to better treatment plans based on the risk of recurrence.
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Photo-assisted uranium extraction from seawater (UES) is regarded as an efficient technique for uranium resource recovery, yet it currently faces many challenges, such as issues like biofouling resistance, low charge separation efficiency, slow carrier transfer, and a lack of active sites. Based on addressing the above challenges, a novel oxygen-deficient CoO/g-CN p-n heterojunction is developed for efficient photo-assisted uranium extraction from seawater. Relying on the defect-coupling heterojunction synergistic effect, the redistribution of molecular charge density formed the built-in electric field as revealed by DFT calculations, significantly enhancing the separation efficiency of carriers and accelerating their migration rate.

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  • The quadrivalent influenza vaccine (QIV) protects against multiple strains, including A/H1N1, A/H3N2, B/Yamagata, and B/Victoria.
  • This study evaluated the effectiveness and safety of giving children either one or two doses of the QIV, factoring in their vaccination history.
  • Results suggest that children aged 3-8 who have had at least two prior doses of influenza vaccine only need one dose, while those with no previous vaccinations should receive the standard two doses.
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Background: Hyperproliferation of pulmonary arterial smooth muscle cells (PASMCs) and consequent pulmonary vascular remodeling are the crucial pathological features of pulmonary hypertension (PH). Protein methylation has been shown to be critically involved in PASMC proliferation and PH, but the underlying mechanism remains largely unknown.

Methods: PH animal models were generated by treating mice/rats with chronic hypoxia for 4 weeks.

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Chemiresistive-based metal oxide semiconductor (MOS) gas sensors are widely used in gas sensing due to their advantageous properties. Graphitic carbon nitride (g-CN) and metal oxide heterostructure materials can improve charge transport properties, selectivity, and sensitivity in MOS gas sensor materials. Herein, for the first time, CuO hollow polyhedral structures (HPSs) were synthesized via a hydrothermal technique and annealed at different temperatures, with the 400 °C annealed (CuO-400 HPSs) demonstrating remarkable sensing capabilities for diethylamine (DEA) gas at room temperature (RT).

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Background: Myocardial mitochondrial dysfunction underpins the pathogenesis of heart failure (HF), yet therapeutic options to restore myocardial mitochondrial function are scarce. Epigenetic modifications of mitochondrial DNA (mtDNA), such as methylation, play a pivotal role in modulating mitochondrial homeostasis. However, their involvement in HF remains unclear.

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  • - Bietti crystalline corneoretinal dystrophy is a genetic retinal disease linked to CYP4V2 mutations, causing blindness, and currently has no treatment.
  • - A clinical trial (NCT04722107) tested a gene therapy called rAAV2/8-hCYP4V2 in 12 participants, showing mostly mild side effects, and achieved improvements in vision for 77.8% of patients by day 180.
  • - The trial results indicated a positive safety profile and significant visual acuity improvements, supporting further research and development of this gene therapy (ZVS101e).
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Background: Abdominal aortic aneurysm (AAA) is a severe aortic disease without effective pharmacological approaches. The nuclear hormone receptor LXRα (liver X receptor α), encoded by the gene, serves as a critical transcriptional mediator linked to several vascular pathologies, but its role in AAA remains elusive.

Methods: Through integrated analyses of human and murine AAA gene expression microarray data sets, we identified as a candidate gene regulating AAA formation.

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Chemically modified nucleosi(ti)des and functional oligonucleotides (ONs, including therapeutic oligonucleotides, aptamer, nuclease, etc.) have been identified playing an essential role in the areas of medicinal chemistry, chemical biology, biotechnology, and nanotechnology. Introduction of functional groups into the nucleobases of ONs mostly relies on the laborious de novo chemical synthesis.

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  • - Exercise training has been shown to improve heart rehabilitation, potentially lowering the risks of heart disease, and the microRNA miR-574-3p is associated with heart health and remodeling, though its role in exercise benefits is not well understood.
  • - In this study, mice underwent a transverse aortic coarctation surgery followed by 4 weeks of swimming, which led to significant improvements in heart structure and function, including reduced cardiac hypertrophy and inflammation.
  • - The results indicated that aerobic exercise increased miR-574-3p levels, and when this microRNA was knocked down, the heart-protective effects of exercise were diminished, suggesting that miR-574-3p plays a crucial role in the cardiopro
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Background And Purpose: In-stent stenosis is commonly observed after stent implantation. There is no consensus on the contributing factors for in-stent stenosis, especially for aneurysms located at or beyond the circle of Willis in the anterior circulation. This study aimed to investigate the morbidity and determinants of in-stent stenosis in distal anterior circulation aneurysms following the implantation of Pipeline Embolization Devices.

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Background: It is uncertain whether adjunctive thrombolysis is beneficial for patients with ST-segment-elevation myocardial infarction undergoing percutaneous coronary intervention (PCI) within 120 minutes of presentation. This study was to determine whether in patients presenting with ST-segment-elevation myocardial infarction a single bolus recombinant staphylokinase (r-SAK) before timely PCI leads to improved patency of the infarct-related artery and reduces the infarct size.

Methods: This is an open-label, prospective, multicenter, randomized study.

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  • Simnotrelvir, an oral protease inhibitor, showed promise in treating mild-to-moderate COVID-19 in a phase 2-3 clinical trial.
  • In the study, patients received either simnotrelvir plus ritonavir or a placebo, with results indicating that those on the drug experienced faster resolution of symptoms compared to the placebo group.
  • Although more adverse events were reported in the simnotrelvir group, most were mild to moderate, suggesting that the treatment is generally safe.
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  • - The study investigates how the DASH diet score influences systolic blood pressure (BP) in relation to genetic factors, analyzing data from over 127,000 participants from different population groups, primarily European.
  • - Researchers identified several genetic loci associated with interactions between an individual's genetics and their response to the DASH diet, particularly focusing on the variant rs117878928 at chromosomal location 15q25.1.
  • - Results suggest significant gene-DASH diet interactions affecting systolic BP, highlighting the need for further research in larger, more diverse populations to confirm these findings.
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  • - The success of T cell-centered immune checkpoint blockade therapies in cancer treatment is limited due to the presence of immunosuppressive myeloid cells that hinder antitumor immunity.
  • - The receptor LILRB3, found only on myeloid cells, is linked to inhibiting these cells' activity, but its role as a checkpoint in cancer treatment is not fully understood.
  • - Research shows that blocking LILRB3 signaling can reactivate the immune system against solid tumors, suggesting that targeting this receptor may offer a new immunotherapy strategy.
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Background: Individuals with type 2 diabetes (T2D) have an increased risk of coronary artery disease (CAD), but questions remain about the underlying pathology. Identifying which CAD loci are modified by T2D in the development of subclinical atherosclerosis (coronary artery calcification [CAC], carotid intima-media thickness, or carotid plaque) may improve our understanding of the mechanisms leading to the increased CAD in T2D.

Methods: We compared the common and rare variant associations of known CAD loci from the literature on CAC, carotid intima-media thickness, and carotid plaque in up to 29 670 participants, including up to 24 157 normoglycemic controls and 5513 T2D cases leveraging whole-genome sequencing data from the Trans-Omics for Precision Medicine program.

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