Publications by authors named "Chen Geng"

Objective: Rapid on-site evaluation (ROSE) of respiratory cytology specimens is a critical technique for accurate and timely diagnosis of lung cancer. However, in China, limited familiarity with the Diff-Quik staining method and a shortage of trained cytopathologists hamper utilization of ROSE. Therefore, developing an improved deep learning model to assist clinicians in promptly and accurately evaluating Diff-Quik stained cytology samples during ROSE has important clinical value.

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Scintillators that convert ionizing radiation into low-energy photons are essential for medical diagnostics and industrial inspections. Despite advances in X-ray scintillators, challenges remain in achieving high efficiency, environmental compatibility, stability, and flexibility. Here, we present experimental investigations of a new type of europium(III)-based hybrid ternary complex scintillators for improved X-ray detection and imaging.

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Background: Studying influential nodes (I-nodes) in brain networks is of great significance in the field of brain imaging. Most existing studies consider brain connectivity hubs as I-nodes such as the regions of high centrality or rich-club organization. However, this approach relies heavily on prior knowledge from graph theory, which may overlook the intrinsic characteristics of the brain network, especially when its architecture is not fully understood.

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Background: Diabetes often causes diabetic nephropathy (DN), a serious long-term complication. It is characterized by chronic proteinuria, hypertension, and kidney function decline, can progress to end-stage renal disease, lowering patients' quality of life and lifespan. Inflammation and apoptosis are key to DN development.

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Background: Large-for-size syndrome (LFSS) is an uncommon but potentially lethal complication following adult liver transplantation (LT). Reduced-size liver transplantation (RSLT) is considered a valuable alternative to delayed fascial closure or mesh closure for preventing LFSS. In this article, we report a successful adult-to-adult RSLT case with right posterior graft sectionectomy using three-dimensional (3D) computer-assisted planning.

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Background: Liver metastasis is highly aggressive and immune tolerant, and lacks effective treatment strategies. This study aimed to develop a neoantigen hydrogel vaccine (NPT-gels) with high clinical feasibility and further investigate its efficacy and antitumor molecular mechanisms in combination with immune checkpoint inhibitors (ICIs) for the treatment of liver metastases.

Methods: The effects of liver metastasis on survival and intratumor T-cell subpopulation infiltration in patients with advanced tumors were investigated using the Surveillance, Epidemiology, and End Results Program (SEER) database and immunofluorescence staining, respectively.

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Interface engineering, by modulating defect distribution and impedance at interfaces and inducing interfacial polarization, has proven to be an effective strategy for optimizing dielectric properties. However, the inherent incompatibility between heterogeneous phases presents a significant challenge in constructing multi-heterointerfaces and understanding how their distribution influences dielectric performance. Herein, we constructed an EGaIn@Ni/NiO/GaO composite structure by employing a low-intensity ultrasound-assisted galvanic replacement reaction followed by high-temperature annealing.

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Liaoning Cashmere Goats are a high-quality dual-purpose breed valued for both their cashmere and meat. They are also a key national genetic resource for the protection of livestock and poultry in China, with their intensive farming model currently taking shape. Leveraging new productivity advantages and reducing labor costs are urgent issues for intensive breeding.

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Machine learning (ML) models for accurately predicting heavy metals with inconsistent outputs have improved owing to dataset outliers, which influence model reliability and accuracy. A comprehensive technique that combines machine learning and advanced statistical methods was applied to assess data outlier's effects on ML models. Ten ML models with three outlier detection methods predicted Cr, Ni, Cd, and Pb in Narayanganj soils.

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Advances in singe-particle cryo-electron microscopy (cryo-EM) have made it possible to solve the structures of numerous Family A and Family B G protein-coupled receptors (GPCRs) in complex with G proteins and arrestins, as well as several Family C GPCRs. Determination of these structures has been facilitated by the presence of large extramembrane components (such as G protein, arrestin, or Venus flytrap domains) in these complexes that aid in particle alignment during the processing of the cryo-EM data. In contrast, determination of the inactive state structure of Family A GPCRs is more challenging due to the relatively small size of the seven transmembrane domain (7TM) and to the surrounding detergent micelle that, in the absence of other features, make particle alignment impossible.

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Chemerin is an adipokine with chemotactic activity to a subset of leukocytes. Chemerin binds to 3 G protein-coupled receptors, including chemokine-like receptor 1 (CMKLR1), G protein-coupled receptor 1 (GPR1), and C-C chemokine receptor-like 2 (CCRL2). Here, we report that GPR1 is capable of Gi signaling when stimulated with full-length chemerin or its C-terminal nonapeptide (C9, YFPGQFAFS).

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Hydroxycarboxylic acid receptor 3 (HCAR3), a class A G-protein-coupled receptor, is an important cellular energy metabolism sensor with a key role in the regulation of lipolysis in humans. HCAR3 is deeply involved in many physiological processes and serves as a valuable target for the treatment of metabolic diseases, tumors, and immune diseases. Here, we report four cryoelectron microscopy (cryo-EM) structures of human HCAR3-Gi1 complexes with or without agonists: the endogenous ligand 3-hydroxyoctanoic acid, the drug niacin, the highly subtype-specific agonist compound 5c (4-(n-propyl)amino-3-nitrobenzoic acid), and the apo form.

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Article Synopsis
  • Children with atrial septal defects (ASD) and ventricular septal defects (VSD) are often assessed for respiratory symptoms, making it essential to distinguish between these two conditions due to differing treatments.
  • A study used deep learning analysis on chest radiographs to effectively differentiate between ASD and VSD; the research involved a large dataset and compared the performance of several algorithms.
  • The InceptionV3 model outperformed human radiologists with an accuracy of 87%, suggesting that deep learning could improve diagnostic efficiency for congenital heart defects.
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  • Soybean domestication has improved photosynthetic phosphorus-use efficiency (PPUE), but the effects on leaf traits and efficiency are still not fully understood.
  • A study involving 48 soybean accessions revealed that cultivars exhibited better photosynthesis rates and PPUE compared to wild relatives, which had higher leaf P concentration.
  • The research suggests that increased PPUE in domesticated soybeans is linked to enhanced photosynthesis and changes in leaf anatomy, emphasizing the importance of P allocation and structure in improving soybean phosphorus use efficiency.
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  • Human aging involves a slow decline in bodily functions and a higher risk of diseases, with the mechanisms behind this process still largely unknown.
  • Single-cell sequencing (SCS) technologies have transformed aging research by allowing for detailed studies of cellular diversity and dynamics, including areas like genomics and proteomics.
  • The review highlights how these technologies help identify aging biomarkers and cell subpopulations, as well as connecting aging to specific diseases, while also providing resources like aging-related databases to further our knowledge.
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  • - The study assesses the effectiveness of stabilized/solidified sediments (S/S sediments) over a long period using an 841-day leaching test, examining factors like cement content, curing time, and zeolite addition.
  • - Results showed that specimens with 6% cement cured for 30 days achieved over 99% stabilization of several heavy metals (like Cr and Pb), but using 10% zeolite instead of some cement improved stabilization and reduced the release of harmful substances like COD and NH-N.
  • - Long-term risks still exist for some compounds exceeding safe limits, but microscopic analysis indicated that specific chemical processes aided heavy metal stabilization, making the zeolite-enhanced mixture a more sustainable option concerning cost and environmental impact.
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As one of the fundamental physical quantities, temperature is extremely important in various fields. In order to study the temperature sensing characteristics of dual-emitting center phosphors, Bi-doped and Bi/Sm-doped SrGaGeO phosphors were synthesized by high-temperature solid-phase method. Under 312 nm excitation, the SrGaGeO:Bi phosphor exhibits a blue broadband emission corresponding to the P → S transition of Bi ions.

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Non-contact measurement based on the 3D reconstruction of sheep bodies can alleviate the stress response in sheep during manual measurement of body dimensions. However, data collection is easily affected by environmental factors and noise, which is not conducive to practical production needs. To address this issue, this study proposes a non-contact data acquisition system and a 3D point cloud reconstruction method for sheep bodies.

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Deep learning has drawn increasing attention in microstructure estimation with undersampled diffusion MRI (dMRI) data. A representative method is the hybrid graph transformer (HGT), which achieves promising performance by integrating -space graph learning and -space transformer learning into a unified framework. However, this method overlooks the 3D spatial information as it relies on training with 2D slices.

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Identifying the primary source of heavy metals (HMs) pollution and the key pollutants is crucial for safeguarding eco-health and managing risks in industrial vicinity. For this purpose, this investigation was carried out to investigate the pollution area identification with soil static environmental capacity (QI), receptor model-oriented critical sources, and Monte Carlo simulation (MCS) based probabilistic environmental and human health hazards associated with HMs in agricultural soils of Narayanganj, Bangladesh. The average concentration of Cr, Ni, Cu, Cd, Pb, Co, Zn, and Mn were 98.

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Article Synopsis
  • Microplastics (MPs) in rivers are becoming a major concern because they may harbor antibiotic resistance genes (ARGs) and pathogens, especially in areas impacted by human activities.
  • A study conducted on the Houxi River found that ARGs, mobile genetic elements (MGEs), and pathogens increased significantly in densely populated areas compared to sparsely populated ones, with human fecal markers indicating a link to human activity.
  • The research identifies various socio-environmental factors influencing the spread of ARGs and suggests that different types of plastic, like polyvinylchloride, create more favorable conditions for pathogens than others, underlining the ecological risks posed by MPs in urban settings.
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Kisspeptin receptor (KISS1R), belonging to the class A peptide-GPCR family, plays a key role in the regulation of reproductive physiology after stimulation by kisspeptin and is regarded as an attractive drug target for reproductive diseases. Here, we demonstrated that KISS1R can couple to the G pathway besides the well-known G pathway. We further resolved the cryo-electron microscopy (cryo-EM) structure of KISS1R-G and KISS1R-G complexes bound to the synthetic agonist TAK448 and structure of KISS1R-G complex bound to the endogenous agonist KP54.

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  • Low-earth-orbit spacecraft face harsh conditions like electron irradiation and thermal cycles, impacting the electric properties of polyimide, a crucial insulation material for electrical equipment.
  • The study examines how polyimide's conductivity evolves under 20 keV electron irradiation and varying temperatures over 432 hours, revealing a significant increase in conductivity and changes in the electric field’s threshold.
  • The results indicate that long-term exposure leads to enhanced mobility of certain molecular components, which boosts conductivity, but also shows that higher trap densities can reduce growth rates in certain electric field ranges.
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