Publications by authors named "Ying Chi"

The increase in metabolic dysfunction-associated steatotic liver disease (MASLD) and its progression to metabolic dysfunction-associated steatohepatitis (MASH) is a worldwide healthcare challenge. Heterogeneity between men and women in the prevalence and mechanisms of MASLD and MASH is related to differential sex hormone signalling within the liver, and declining hormone levels during aging. In this study we used biochemically characterised pluripotent stem cell derived 3D liver spheres to model the protective effects of testosterone and estrogen signalling on metabolic liver disease 'in the dish'.

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Objective To construct a library of human-derived anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) single-chain variable fragments (scFv) and screen for broad-spectrum neutralizing antibodies to identify candidate molecules for the development of diagnostic and therapeutic agents. Methods Peripheral blood mononuclear cells (PBMCs) were isolated from the peripheral blood of patients who had recovered from novel coronavirus infection. Total RNA was extracted from these PBMCs and reverse transcribed into cDNA, which was used as a template for constructing a human anti-SARS-CoV-2 scFv library.

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Article Synopsis
  • The study addresses the lack of understanding and research on essential thrombocythemia (ET) and prefibrotic primary myelofibrosis (pre-PMF) in individuals under 18, calling attention to diagnostic and treatment issues.
  • A large cohort analysis revealed immunophenotypic abnormalities as new clonal markers in childhood ET and pre-PMF, alongside unique mutational profiles compared to adults.
  • Key findings show that venous thrombosis and specific immunophenotypic abnormalities are risk factors for disease progression, with significant differences in treatment practices and outcomes between childhood and adult cases.
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  • Triple-negative essential thrombocytopenia (TN-ET) lacks driver mutations but still meets diagnostic criteria, prompting a study to understand its clinical and molecular characteristics and link them to platelet activation and thrombotic risks.
  • A multicenter study compared 138 TN-ET patients to 759 ET patients with the JAK2V617F mutation, revealing that TN-ET patients tended to be younger and had fewer thrombotic events both before diagnosis and during follow-up.
  • Results indicated that TN-ET patients had lower platelet activation and reactive oxygen species (ROS) levels, correlating with a reduced risk of thrombosis compared to those with the JAK2V617F mutation.
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  • Primary immune thrombocytopenia (ITP) is an autoimmune disorder that affects platelet levels and bleeding, and the study investigates the role of chemokines in diagnosing and evaluating bleeding risk in ITP patients.
  • A Luminex-based assay measured multiple chemokines in plasma samples from ITP patients and those with other forms of thrombocytopenia, identifying key chemokines and cytokines that may serve as diagnostic and bleeding risk biomarkers.
  • The study's findings were validated through additional assays, suggesting that specific chemokines could improve the accuracy of ITP diagnosis and better assess bleeding risk in affected individuals.
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Essential thrombocythemia (ET) and prefibrotic primary myelofibrosis (pre-PMF) are Philadelphia chromosome-negative myeloproliferative neoplasms. These conditions share overlapping clinical presentations; however, their prognoses differ significantly. Current morphological diagnostic methods lack reliability in subtype differentiation, underlining the need for improved diagnostics.

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Background: Immune thrombocytopenia (ITP) is an autoimmune disease characterized by autoantibody-mediated platelet destruction. Treatment with CM313, a novel anti-CD38 monoclonal antibody, can result in targeted clearance of CD38-positive cells, including plasma cells.

Methods: We conducted a phase 1-2, open-label study to evaluate the safety and efficacy of CM313 in adult patients with ITP.

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Patients with refractory immune thrombocytopenia (ITP) frequently encounter substantial bleeding risks and demonstrate limited responsiveness to existing therapies. Umbilical cord-derived mesenchymal stem cells (UC-MSCs) present a promising alternative, capitalizing on their low immunogenicity and potent immunomodulatory effects for treating diverse autoimmune disorders. This prospective phase I trial enrolled eighteen eligible patients to explore the safety and efficacy of UC-MSCs in treating refractory ITP.

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Coronaviruses have threatened humans repeatedly, especially COVID-19 caused by SARS-CoV-2, which has posed a substantial threat to global public health. SARS-CoV-2 continuously evolves through random mutation, resulting in a significant decrease in the efficacy of existing vaccines and neutralizing antibody drugs. It is critical to assess immune escape caused by viral mutations and develop broad-spectrum vaccines and neutralizing antibodies targeting conserved epitopes.

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This study aimed to identify key proteomic analytes correlated with response to splenectomy in primary immune thrombocytopenia (ITP). Thirty-four patients were retrospectively collected in the training cohort and 26 were prospectively enrolled as validation cohort. Bone marrow biopsy samples of all participants were collected prior to the splenectomy.

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Immune thrombocytopenia (ITP) is an autoimmune disease characterized by antibody-mediated platelet destruction and impaired platelet production. The mechanisms underlying ITP and biomarkers predicting the response of drug treatments are elusive. We performed a metabolomic profiling of bone marrow biopsy samples collected from ITP patients admission in a prospective study of the National Longitudinal Cohort of Hematological Diseases.

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Introduction: During the COVID-19 pandemic in China, the proportion of patients with uveitis who were infected with SARS-CoV-2 increased greatly. The impact of SARS-CoV-2 infection on patients with uveitis has not been fully described.

Methods: A questionnaire on SARS-CoV-2 infection was sent to patients with uveitis to assess ocular and systemic conditions before and after infection.

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Background: Rabies is a widespread, fatal, infectious disease. Several antivirals against rabies virus (RABV) infection have been reported, but no approved, RABV-specific antiviral drugs that inhibit RABV infection in the clinic after symptom onset are available. Therefore, more effective drugs to reduce rabies fatalities are urgently needed.

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Mesenchymal stem cells (MSCs) possess potent immunomodulatory activity and have been extensively investigated for their therapeutic potential in treating inflammatory disorders. However, the mechanisms underlying the immunosuppressive function of MSCs are not fully understood, hindering the development of standardized MSC-based therapies for clinical use. In this study, we profile the single-cell transcriptomes of MSCs isolated from adipose tissue (AD), bone marrow (BM), placental chorionic membrane (PM), and umbilical cord (UC).

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Rabies is a fatal neurological infectious disease caused by rabies virus (RABV). However, no effective anti-RABV drugs for treatment during the symptomatic phase are available. The novel adenosine nucleoside analog galidesivir (BCX4430) has broad-spectrum activity against a wide variety of highly pathogenic RNA viruses.

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The current study involving 318 essential thrombocythemia (ET) patients with prior thrombosis was designed to identify risk factors that were predictive of recurrent thrombosis. The whole cohort was randomly split into derivation and validation cohorts. The random forest method, support vector machine with built-in recursive feature elimination model, and logistic multivariable analysis were performed in the derivation cohort, and cardiovascular risk factor (CVF) and RBC distribution width with standard deviation (RDW-SD) were finally selected as independent predictors.

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Article Synopsis
  • Tissues display complex variations in gene expression and their spatial arrangement, but traditional single-cell RNA sequencing (RNA-seq) methods often lose this crucial spatial data.
  • The proposed method, single-cell spatial position associated co-embeddings (scSpace), reconstructs cells within a pseudo-space using spatial transcriptome references to identify spatially distinct cell subpopulations.
  • Benchmarking with various datasets shows that scSpace effectively reveals spatial relationships in complex tissues like the brain and liver, and has potential applications in understanding diseases like melanoma and COVID-19.
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Background: Thrombosis is an important cause of death in patients with polycythemia vera (PV). The conventional stratification of thrombosis may ignore some potential risk factors.

Objectives: This study aimed to develop and validate a multiple factor-based prediction model of thrombosis for the 2016 World Health Organization-dened PV.

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Objective: To screen better promoters and provide more powerful tools for basic research and gene therapy of hemophilia.

Methods: Bioinformatics methods were used to analyze the promoters expressing housekeeping genes with high abundance, so as to select potential candidate promoters. The reporter gene vector was constructed, and the packaging efficiency of the novel promoter was investigated with EF1 α promoter as control, and the transcription and activities of the reporter gene were investigated too.

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Introduction: Platelet function, rather than platelet count, plays a crucial role in thrombosis in essential thrombocythemia (ET). However, little is known about the abnormal function of platelets in ET. Here, we investigated the functional characteristics of platelets in ET hemostasis to explore the causes of ET platelet dysfunction and new therapeutic strategies for ET.

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To regulate the safety behavior of employees and improve the occupational safety level of enterprises. Based on the perspective of safety culture, this paper designed an index system based on the four dimensions of safety concept, system, behavior, and physical culture, and it explored a new quantitative assessment method of safety culture level by introducing the concept of maturity into the evaluation of safety culture using the grey fuzzy comprehensive evaluation method. Combining the characteristics of enterprise safety culture, safety culture was divided into five levels, including original level, starting level, development level, completion level, and leading level, and the maturity model of enterprise safety culture was established.

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JAK2V617F is the most frequent mutation in BCR-ABL-negative myeloproliferative neoplasms (MPNs). It is an important but not the only determinant of MPN phenotype. We performed high-throughput sequencing on JAK2V617F essential thrombocythaemia (ET) and polycythaemia vera (PV) patient samples to unveil factors involved in phenotypic heterogeneity and to identify novel therapeutic targets for MPN.

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