Publications by authors named "Li-xu Yan"

Purpose: To explore the application effect of mind mapping-assisted flipped classroom in clinical endodontics teaching.

Methods: A total of 41 fifth-year undergraduates majoring in stomatology from School of Stomatology, Tongji University, finishing their clinical internship at Departments of Endodontics from October 2023 to March 2024, were randomly divided into control group (traditional teaching group, n=21) and experimental group (flipped classroom teaching group, n=20). Theoretical assessments were conducted on the day of entering the department and at the end of eight weeks in the department.

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Objective: To verify whether the bleeding risk assessment guidelines from the 9th American College of Chest Physicians (ACCP) are prognostic for respiratory intensive care unit (RICU) patients and to explore risk factors for hemorrhages, we conducted a secondary data analysis based on our previously published cohort study of venous thromboembolism.

Patients And Methods: We performed a secondary data analysis on the single-center prospective cohort from our previous study. Patients admitted to the RICU at Beijing Chao-Yang Hospital from August 1, 2014 to December 31, 2020 were included and followed up until discharge.

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Article Synopsis
  • Transformation to small cell lung cancer (SCLC) is a resistance mechanism seen in lung adenocarcinoma (LUAD) patients treated with tyrosine kinase inhibitors, particularly in those with leptomeningeal metastases (LM).
  • In a study of 237 non-small cell lung cancer (NSCLC) patients who had lumbar punctures, SCLC cells were identified in the cerebrospinal fluid (CSF) of 8 patients, all of whom showed resistance to targeted therapies.
  • The results suggest that SCLC transformation in CSF can be detected using cytological evaluation and ctDNA analysis, providing valuable insights into treatment resistance mechanisms, with this transformation correlating with reduced survival rates.
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  • The study evaluates the effectiveness of neoadjuvant immunotherapy combined with chemotherapy in patients with localized EGFR-mutant non-small cell lung cancer (NSCLC) through a phase 2 trial involving 18 participants.
  • Interim results show that while many patients had positive radiological responses, only 44% reached major pathological response, and there were no cases of complete response.
  • The research indicates that certain T cell populations are linked to resistance against immunotherapy and suggests that monitoring circulating tumor DNA (ctDNA) could help identify patients less likely to respond to such treatments.
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This study explored the effects of 4-hydroxy-2(3H)-benzoxazolone(HBOA) on the proliferation and apoptosis of pancreatic cancer cells and its molecular mechanism. The L3.6 cells cultured in vitro were treated with HBOA of 0-1.

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Introduction: Systematic evaluation of long-term outcomes in survivors of H1N1 is still lacking. This study aimed to characterize long-term outcomes of severe H1N1-induced pneumonia and acute respiratory distress syndrome (ARDS).

Method: This was a single-center, prospective, cohort study.

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This prospective multicenter phase II study evaluated the clinical efficacy of neoadjuvant nivolumab-exclusive (N) and nivolumab-chemotherapy (N/C) combinations based on PD-L1 expression. Eligible patients exhibited resectable clinical stage IIA-IIIB (AJCC 8th edition) NSCLC without EGFR/ALK alterations. Patients received either mono-nivolumab (N) or nivolumab + nab-paclitaxel+ carboplatin (N/C) for three cycles based on PD-L1 expression.

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Pulmonary nodules with part-solid imaging features manifest during the progression from preinvasive to invasive lung adenocarcinoma. To define the spatial composition and evolutionary trajectories of early-stage lung adenocarcinoma, we combined spatial transcriptomics (ST) and pathological annotations from 20 part-solid nodules (PSNs), four of which were matched with single-cell RNA sequencing. Two malignant cell populations (MC1 and MC2) were identified, and a linear evolutionary relationship was observed.

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Introduction: Psittacosis can cause severe community-acquired pneumonia (CAP). The clinical manifestations of psittacosis range from subclinical to fulminant psittacosis with multi-organ failure. It is essential to summarize the clinical characteristic of patients with severe psittacosis accompanied by acute hypoxic respiratory failure (AHRF).

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Two acentric aluminoborates (ABOs), [Zn(en)Al{BO(OH)}{BO(OH)}] () and [Cd(en)AlBO]·HO () (en = ethylenediamine), have been solvothermally made. includes a two-dimensional (2D) wavy ABO layer using BO(OH) clusters and AlO{BO(OH)} groups, in which both units can be regarded as three-connected nodes, and simplifying the ABO layer to a -type network. features an acentric three-dimensional (3D) porous framework with a unique -type network constituted by strictly alternating connected BO clusters and AlO units.

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Background: Critically ill patients in intensive care units (ICUs) are at high risk of venous thromboembolism (VTE). This study aimed to explore the prophylaxis effect under a guideline-based thromboprophylaxis protocol among critically ill patients in a respiratory ICU.

Methods: For this single-center prospective cohort study, we followed the thromboprophylaxis protocol, which was drawn up based on relevant guidelines and Chinese experts' advice.

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Despite limited efficacy of immunotherapy for advanced non-small-cell lung cancer (NSCLC) with driver mutations, whether neoadjuvant immunotherapy could be clinically valuable in those patients warrants further investigation. We utilized 40 oncogene-mutant NSCLC treated with induction immunotherapy from a large consecutive multicenter cohort. Overall response rate was 62.

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Major pathological response (MPR) is a potential surrogate for overall survival. We determined whether the dynamic changes in F-labeled fluoro-2-deoxyglucose positron emission tomography/computed tomography ( F-FDG PET/CT) were associated with MPR in patients receiving neoadjuvant immunotherapy. Forty-four patients with stage II-III non-small cell lung cancer (NSCLC) who received neoadjuvant immunotherapy and radical surgery were enrolled.

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Two mixed alkali-metal borates, KLi[BO]·0.5HO () and [(μ-OH)@(NaLi)][BO]·0.5B(OH) (), have been prepared under solvothermal conditions.

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Article Synopsis
  • The study aimed to develop and validate the immune ecosystem diversity index (iEDI) as a non-invasive imaging biomarker to assess intratumoural immune status in non-small cell lung cancer (NSCLC).
  • Researchers analyzed two independent cohorts of NSCLC patients, measuring T cell densities and using preoperative CT scans to correlate with patient survival outcomes.
  • Results showed that higher iEDI scores were associated with longer overall survival, indicating its potential as a prognostic tool for NSCLC patients undergoing surgery.
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Background: The cuff leak test (CLT) has been shown to have excellent specificity and moderate sensitivity for predicting postextubation stridor (PES). However, the ventilator flow waveform and the subject position are not uniform in current clinical practice.

Methods: We conducted a prospective cohort study in the respiratory ICU of the Beijing Chaoyang Hospital, Capital Medical University.

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Article Synopsis
  • Four new inorganic-organic hybrid borates were synthesized using solvothermal methods, characterized by specific organic linkers such as ethylenediamine and various diamines.
  • Two of these compounds are isostructural and feature a two-dimensional layer structure formed by BO(OH) clusters connected through shorter diamine linkers.
  • A different framework was created by using a longer diamine (1,6-dah) and a transition metal (Cd) instead of potassium, leading to a novel oxoboron cluster with unique structural properties.
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Background: Hypoxemia frequently occurs during bronchoscopy. High-flow nasal cannula (HFNC) oxygen therapy may be a feasible alternative to prevent the deterioration of gas exchange during bronchoscopy. With the convenience of clinical use in mind, we modified an HFNC using a single cannula.

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Extracorporeal membrane oxygenation (ECMO) might benefit critically ill COVID-19 patients. But the considerations besides indications guiding ECMO initiation under extreme pressure during the COVID-19 epidemic was not clear. We aimed to analyze the clinical characteristics and in-hospital mortality of severe critically ill COVID-19 patients supported with ECMO and without ECMO, exploring potential parameters for guiding the initiation during the COVID-19 epidemic.

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An acentric layer-pillared borate, LiBO·Hdap·HO (, dap = 1,3-diaminopropane), cotemplated by organic and inorganic cations and build by mixed oxoboron cluster units of BO and BO, has first been made under solvothermal conditions, in which the BO clusters link each other to form 2D layers containing 9-membered ring (MR) windows, while the BO clusters join together to produce 1D chains that further perform as the pillars to connect neighboring layers, resulting in a 3D layer-pillared framework with 13- and 7-MR channels located by Hdap and Li cations, respectively. Its second harmonic generation shows a response of ∼2.1 times that of KDP (KHPO).

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Four inorganic-organic hybrid octa-Cu cluster sandwiched polyoxotungstates (POTs), [Cu(HO)(en)(B-α-HSiWO)] (), [Cu(HO)(en)(B-α-HGeWO)] (), K[Cu(en)(B-α-HSiWO)]·6HO (), and K[Cu(en)(B-α-HGeWO)]·2HO () (en = ethylenediamine), were hydrothermally made and characterized by single-crystal X-ray diffraction, infrared spectra, powder X-ray diffraction, and thermogravimetric analysis, respectively. Structure analysis reveals that the polyoxoanion of / is a discrete dimer built by two trivalent Keggin [B-α-XWO] (X = Si/Ge) fragments and one octa-Cu cluster, whereas and display a two-dimensional network built by octa-Cu-sandwiched POT units via substitution of coordinated water on polyanions of and and further expand into a three-dimensional framework via K cation bridges. Ultraviolet-visible diffuse reflectance spectra reveal that are potential semiconductor materials.

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Background: Following endotracheal intubation, clearing secretions above the endotracheal tube cuff decreases the incidence of ventilator-associated pneumonia (VAP); therefore, subglottic secretion drainage (SSD) is widely advocated. Our group developed a novel technique to remove the subglottic secretions, the rapid-flow expulsion maneuver (RFEM). The objective of this study was to explore the effectiveness and safety of RFEM compared with SSD.

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Multiple primary lung cancer (MPLC) remains a tough challenge to diagnose and treat. Although neoadjuvant immunotherapy has shown promising results in early stage non-small cell lung cancer, whether such modality can benefit all primary lesions remains unclear. Herein, we performed integrated multiomics analysis in one patient with early stage MPLC with remarkable tumor shrinkage in a solid nodule and no response in two subsolid nodules after treatment with three cycles of neoadjuvant pembrolizumab.

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Synopsis of recent research by authors named "Li-xu Yan"

  • - Li-Xu Yan's recent research spans various critical areas in respiratory medicine and oncology, focusing on the assessment of bleeding risks in thromboprophylaxis for critically ill patients, as well as exploring molecular transformations in lung adenocarcinoma with leptomeningeal metastases.
  • - The investigations reveal significant insights into neoadjuvant therapies for EGFR-mutant non-small cell lung cancer and the long-term outcomes of severe pneumonia caused by H1N1, indicating a crucial understanding of treatment efficacy and patient survivorship.
  • - Additionally, the research employs advanced methodologies such as spatial transcriptomics to delineate the evolutionary trajectories of lung adenocarcinoma, showcasing Li-Xu Yan's commitment to integrating cutting-edge techniques in cancer research for improved diagnostic and therapeutic approaches.