Publications by authors named "Yun Xi"

Respiratory syncytial virus (RSV) is a major cause of acute respiratory tract infections in infants and elderly individuals, leading to hospitalisation and potentially fatal outcomes, posing a serious threat to global health and economy. This study proposes a smartphone-based mobile digital pressure sensor (smartphone-MDPS) for the quantitative detection of the RSV fusion protein (RSV-F) in clinical nasopharyngeal samples. The smartphone-MDPS utilized two monoclonal antibodies (mAbs) specific to the F protein, of which mAb1 was conjugated with Au@PtNPs (Au@PtNPs-mAb1) as the detection antibody and mAb2 was coupled with magnetic beads (MB-mAb2) as a coating antibody to establish a novel sandwich immunoassay.

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Pythiosis, a rare and formidable infectious disease caused by , is characterized by profound uncertainties in achieving definitive diagnoses, suboptimal outcomes, and an exceptionally high mortality rate. Here, we present a rare case of human spinal pythiosis in southern China. With advanced metagenomic sequencing technology, was pinpointed as the causative pathogen.

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() is a pathogen typically transmitted through respiratory droplets and skin contact, causing an estimated 700 million mild non-invasive infections worldwide each year. There are approximately 650 000 infections that progress to severe invasive infections, even resulting in death. Therefore, the ability to detect rapidly, accurately and in real time is important.

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Purpose: Generating polar map (PM) from [Ga]Ga-DOTA-FAPI-04 PET images is challenging and inaccurate using existing automatic methods that rely on the myocardial anatomical integrity in PET images. This study aims to enhance the accuracy of PM generated from [Ga]Ga-DOTA-FAPI-04 PET images and explore the potential value of PM in detecting reactive fibrosis after myocardial infarction and assessing its relationship with cardiac function.

Methods: We proposed a deep-learning-based method that fuses multi-modality images to compensate for the cardiac structural information lost in [Ga]Ga-DOTA-FAPI-04 PET images and accurately generated PMs.

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Article Synopsis
  • The study explores the therapeutic synergy between antibody drug conjugates (ADCs) and the epigenetic drug decitabine (DAC) in melanoma, revealing how they work together to improve treatment efficacy.
  • DAC boosts the effectiveness of I1-DXd (an ICAM1 antibody conjugated to a DNA topoisomerase I inhibitor) by increasing antigen expression and enhancing the drug's internalization while also making the tumor more sensitive to treatment.
  • The combination therapy also positively impacts the tumor microenvironment by promoting the infiltration of immune cells and improving the penetration of ADCs, resulting in stronger antitumor immunity.
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The successful development of Sacituzumab Govitecan and Trastuzumab Deruxtecan has made camptothecin derivatives one of the most popular payloads for antibody-drug conjugates (ADCs). Camptothecin and its derivatives all exist in a pH-dependent equilibrium between the carboxylate and lactone forms. Such transformation may lead to differences in the ratio of the two molecular forms in calibration standards and biological matrix (bio-matrix) samples, thereby leading to inaccurate conjugated antibody results.

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Article Synopsis
  • The study aims to identify patients with early-stage oral tongue squamous cell carcinoma (OTSCC) who could benefit from postoperative radiotherapy (PORT).
  • A total of 528 patients were analyzed, with findings indicating that PORT significantly improved survival outcomes for those with moderate-to-poor differentiation and certain clinical features like perineural infiltration.
  • Results showed that patients receiving PORT had better overall survival and disease-free survival rates compared to those who did not, particularly in specific subgroups, suggesting targeted use of PORT could enhance patient outcomes.
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Background Translocator protein (TSPO) PET has been used to visualize microglial activation in neuroinflammation and is a potential imaging tool for detecting autoimmune encephalitis (AIE). Purpose To compare the detection rate between TSPO radioligand fluorine 18 (F) DPA-714 PET and conventional MRI and assess the relationship between F-DPA-714 uptake and clinical features in participants with AIE. Materials and Methods Healthy volunteers and patients with AIE were enrolled in this prospective study between December 2021 and April 2023.

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Purpose: To compare the diagnostic value of [ Ga]Ga-FAPI-04 PET/MR and [F]FDG PET/CT in patients with T stage ≤ 2a2 uterine cervical cancer patients.

Methods: Patients pathologically diagnosed with cervical cancer and with a T stage ≤ T2a2 were prospectively enrolled. All patients underwent whole-body [ Ga]Ga-FAPI-04 PET/MR and [F]FDG PET/CT within 2 weeks, and surgical treatment was performed within 10 days after PET.

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Objective: The inhibition of the Hippo pathway through targeting the Yes-associated protein (YAP) presents a novel and promising approach for treating tumors. However, the efficacy of YAP inhibitors in the context of breast cancer (BC) remains incompletely understood. Here, we aimed to investigate the involvement of YAP in BC's metabolic reprogramming and reveal the potential underlying mechanisms.

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Glucose metabolic reprogramming, known as the Warburg effect, is one of the metabolic hallmarks of tumor cells. Cancer cells preferentially metabolize glucose by glycolysis rather than mitochondrial oxidative phosphorylation regardless of oxygen availability, but the regulatory mechanism underlying this switch has been incompletely understood. Here, we report that the circular RNA circ ankyrin repeat domain 17 (ANKRD17) functions as a key regulator for glycolysis to promote cell growth, migration, invasion, and cell-cycle progression in breast cancer (BC) cells.

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Treatment options for anaplastic thyroid cancer (ATC) and refractory papillary thyroid carcinoma (PTC) are limited and outcomes remain poor. In this study, we determined via bioinformatic expression analyses and immunohistochemistry staining that intercellular adhesion molecule-1(ICAM1) is an attractive target for ATC and PTC. We designed and engineered two ICAM1-directed antibody-drug conjugate (I1-MMAE and I1-DXd), both of which potently and selectively ablate multiple human ATC and PTC cell lines without affecting non-plastic cells .

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Purpose: To use bifunctional target genes to increase the intracellular transport of gemcitabine (GEM) to reverse chemotherapy resistance and to simultaneously use reporter gene imaging to localize therapeutic genes. The therapeutic effect was evaluated by [F]FLT PET/CT to visualize the effect of gene therapy.

Methods: A viral gene vector containing the pancreatic cancer-targeting promoter MUC1 for specific transcription of equilibrative nucleoside transporter 1 (ENT1) and NIS (nuclide transport channel) was employed.

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Purpose: To provide a theory for guiding clinical treatment by comparing the clinical application value of [F]fluorodeoxyglucose ([F]FDG) PET/CT and [Ga]Ga-FAPI (fibroblast activating protein inhibitor) PET/MR in the diagnosis and evaluation of resectability of ovarian cancer.

Methods: Thirty patients with high clinical suspicion of ovarian malignancies were enrolled from July 2021 to October 2022 and underwent [F]FDG PET/CT and [Ga]Ga-FAPI-04 PET/MR within 5 days. Twenty patients underwent [F]FDG PET/MR at once completing [F]FDG PET/CT for consistency checking.

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In secondary hyperparathyroidism (SHPT) disease, preoperatively localizing hyperplastic parathyroid glands is crucial in the surgical procedure. These glands can be detected via the dual-modality imaging technique single-photon emission computed tomography/computed tomography (SPECT/CT) since it has high sensitivity and provides an accurate location. However, due to possible low-uptake glands in SPECT images, manually labeling glands is challenging, not to mention automatic label methods.

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Background: The aim is to verify the therapeutic effect and possible mechanism of human umbilical cord Wharton's jelly-derived transplantation of mesenchymal stem cells (UMSCs) on CCl4-induced hepatic fibrosis rats through in vivo studies and to explore the regulatory mechanism of UMSCs on fibrosis of hepatic stellate cells (HSCs) through in vitro experiments.

Methods: In vivo experiment: Rats were randomly divided into blank control group and hepatic fibrosis group. During the entire trial, the blank control group received subcutaneous injection of normal saline, while in the hepatic fibrosis group received injections of 50% CCl4-olive oil subcutaneously for 10 weeks to establish the rat model of liver fibrosis.

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Background: Triple-negative breast cancer (TNBC) is an aggressive subtype of breast cancer and is susceptible to develop gemcitabine (GEM) resistance. Decreased expression of human equilibrative nucleoside transporter 1 (hENT1) accompanied by compensatory increase of glycolysis is strongly associated with GEM resistance in TNBC. In this study, we investigated the treatment feasibility of combined hENT1 upregulation and miR-143-mediated inhibition of glycolysis for reversing GEM resistance in TNBC.

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Compared with other deadly diseases, the coronavirus disease 2019 (COVID-19) is highly infectious with a relatively low mortality rate. Although critical cases account for only 5% of cases, the mortality rate for the same is nearly 50%. Therefore, the key to the COVID-19 treatment is to effectively treat severe patients and reduce the transition from severe to critical cases.

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Background: To evaluate the effect of the hepatitis B virus (HBV) on the coagulation parameters in patients with hepatitis B virus-related decompensated cirrhosis (HBV-DeCi).

Methods: A retrospective analysis was conducted on the medical records of 112 patients with HBV-DeCi. Baseline clinical and laboratory characteristics were retrieved.

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A 61-year-old man was hospitalized for suspected cardiac amyloidosis. 99mTc-Pyrophosphate scintigraphy showed intense radiotracer uptake in the heart compared with the ribs, suggestive of transthyretin cardiac amyloidosis. Subsequent genetic test showed missense mutations in the transthyretin gene, which confirmed the diagnosis.

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Membrane arrays are a unique array platform option for the detection of multiple analytes or materials simultaneously. Their naturally absorptive properties and near universal use in various laboratory methods make it an excellent source with which to probe multiple factors simultaneously. Any liquid sample type can be probed, from bacterial strains, tissue lysates, secreted proteins, to DNA aptamers.

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Background: To investigate the virological and serological characteristics of chronic hepatitis B patients concurrently positive for HBsAg and anti-HBs.

Methods: Chronic hepatitis B patients with coexistence of HBsAg and anti-HBs were screened by electrochemiluminescence immunoassay (ECLIA). The serum biomarkers such as HBV markers, HBV DNA load, AFP, and liver function were detected, and the virological and serological features were analyzed.

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Gemcitabine (GEM) chemotherapy, as the first-line regimen for pancreatic cancer, tends to induce drug resistance, which ultimately worsens the prognosis of patients with pancreatic cancer. Our previous study indicated a close correlation between pancreatic cancer progression and glucose metabolism, especially at the chemoresistant stage, highlighting the importance of the application of F-FDG PET dual-phase imaging in the early detection of pancreatic cancer. We speculate that glycolysis, participates in the development of chemoresistance in pancreatic cancer.

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