Publications by authors named "Xudong Han"

Background: Not all people with neuropathological evidence of Alzheimer's disease (AD) manifest clinical symptoms in life (cognitive resilience). We aimed to identify genetic and epigenetic signatures of cognitive resilience, utilizing data from brain donors with neuropathological evidence of AD who were either symptomatic or asymptomatic in life.

Method: Among brain donors with neuropathologically-confirmed AD (364 asymptomatic/cognitively resilient and 490 symptomatic) from the Boston University AD Research Center, Framingham Heart Study-where we generated our own data-as well as the Religious Orders Study and Rush Memory and Aging Project, we utilized genome-wide genetic array data, genome-wide DNA methylation array data and RNA sequencing data.

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Introduction: Limited success to date in development of drugs that target hallmark Alzheimer disease (AD) proteins as a means to slow AD-related cognitive decline has sparked interest in approaches focused on cognitive resilience. We sought to identify transcriptome signatures among brain donors with neuropathologically confirmed AD that distinguish those with cognitive impairment from those that were cognitively intact.

Methods: We compared gene expression patterns in brain tissue from donors in four cohorts who were cognitively and pathologically normal (controls), met clinical and pathological criteria for AD (SymAD), or were cognitively normal prior to death despite pathological evidence of AD (cognitively resilient or AsymAD).

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Psychological stress contributes to cardiovascular disease (CVD) and sudden cardiac death, yet its molecular basis remains obscure. RNA binding protein RBM24 plays a critical role in cardiac development, rhythm regulation, and cellular stress. Here, we show that psychological stress activates RBM24 S181 phosphorylation through eIF4E2-GSK3β signaling, which causally links psychological stress to CVD by promoting APOE translation (apolipoprotein E).

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Once ovulated, the oocyte has to be fertilized in a short time window or it will undergo post-ovulation aging (POA), whose underlying mechanisms are still not elucidated. Here, we optimized single-cell proteomics methods and performed single-cell transcriptomic, proteomic, and phosphoproteomic analysis of fresh, POA, and melatonin-treated POA oocytes. POA oocytes showed downregulation of most differentially expressed proteins, with little correlation with mRNA expression, and the protein changes can be rescued by melatonin treatment.

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Background: Coronavirus disease 2019 (COVID-19), a disease that affected tens of millions of people, upended the lives of countless individuals around the globe. The chloroquine (CQ) and its analogue hydroxychloroquine (HCQ) were the most frequently cited as potential treatments and preventatives against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The primary aim of this investigation was to scrutinize the effectiveness and safety of HCQ for COVID-19 prevention and to present powerful evidence and reference for clinical practice.

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  • This study investigates the link between the total time from symptom onset to balloon treatment (S2BT) and the risk of developing new ventricular arrhythmias (VAs) in patients who suffered a heart attack (STEMI) and underwent a procedure called PCI.
  • A total of 517 patients were examined, revealing that those with a shorter S2BT (≤ 24 hours) had a lower risk of VAs and better heart function after treatment, while those with an S2BT of 24 hours to 7 days had a higher risk.
  • The findings suggest that S2BT has a complex relationship with VAs, with the highest risk occurring at around 68.4 hours after symptom onset.
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  • Melanoma is a highly malignant skin cancer and a leading cause of skin cancer deaths, prompting research into traditional Chinese medicine for potential treatments, specifically focusing on celastrol, a compound from Tripterygium wilfordii.
  • In experiments, celastrol was found to reduce the viability and migration of B16-F10 melanoma cells by affecting the PI3K/AKT/mTOR pathway, which led to increased cell apoptosis and altered cell cycle progression.
  • The findings indicate that celastrol effectively inhibits melanoma cell function by down-regulating HIF-α mRNA expression and promoting increased reactive oxygen species (ROS) in the cells.
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Drinking water treatment sludge (DWTS) is a by-product of water treatment, and it is difficult to recycle to high value and poses potential environmental risks. Recycling DWTS into cement-based materials is an effective measure to achieve its high-volume utilization and reduce its environmental load. DWTS is rich in silica-alumina phases and has potential pozzolanic activity after drying, grinding and calcination, giving it similar properties to traditional supplementary cementitious materials.

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  • The adult mammalian heart has limited regenerative ability, while the neonatal heart can regenerate, making it a focus for treating heart diseases like myocardial infarction and heart failure.
  • The study investigates the role of cellular nucleic acid binding protein (CNBP) in cardiac regeneration, finding that high CNBP levels promote cardiomyocyte (CM) growth and survival while low levels hinder it.
  • CNBP enhances DNA replication and cell cycle progression by increasing β-catenin and its targets, suggesting it's a promising therapeutic target for repairing heart damage.
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Protein subcellular localization (PSL) is very important in order to understand its functions, and its movement between subcellular niches within cells plays fundamental roles in biological process regulation. Mass spectrometry-based spatio-temporal proteomics technologies can help provide new insights of protein translocation, but bring the challenge in identifying reliable protein translocation events due to the noise interference and insufficient data mining. We propose a semi-supervised graph convolution network (GCN)-based framework termed TransGCN that infers protein translocation events from spatio-temporal proteomics.

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Although advances in single-cell technologies have enabled the characterization of multiple omics profiles in individual cells, extracting functional and mechanistic insights from such information remains a major challenge. Here, we present scapGNN, a graph neural network (GNN)-based framework that creatively transforms sparse single-cell profile data into the stable gene-cell association network for inferring single-cell pathway activity scores and identifying cell phenotype-associated gene modules from single-cell multi-omics data. Systematic benchmarking demonstrated that scapGNN was more accurate, robust, and scalable than state-of-the-art methods in various downstream single-cell analyses such as cell denoising, batch effect removal, cell clustering, cell trajectory inference, and pathway or gene module identification.

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In-hand object pose estimation is challenging for humans and robots due to occlusion caused by the hand and object. This paper proposes a soft finger that integrates inner vision with kinesthetic sensing to estimate object pose inspired by human fingers. The soft finger has a flexible skeleton and skin that adapts to different objects, and the skeleton deformations during interaction provide contact information obtained by the image from the inner camera.

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Myopia has become the major cause of visual impairment worldwide. Although the pathogenesis of myopia remains controversial, proteomic studies suggest that dysregulation of retinal metabolism is potentially involved in the pathology of myopia. Lysine acetylation of proteins plays a key role in regulating cellular metabolism, but little is known about its role in the form-deprived myopic retina.

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Background: Raw starch-degrading α-amylase (RSDA) can hydrolyze raw starch at moderate temperatures, thus contributing to savings in starch processing costs. However, the low production level of RSDA limits its industrial application. Therefore, improving the extracellular expression of RSDA in Bacillus subtilis, a commonly used industrial expression host, has great value.

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Near-fatal asthma (NFA) can lead to severe hypercapnia and sudden cardiac arrest; however, it can be reversed by extracorporeal membrane oxygenation (ECMO). We report a case of a 37-year-old male diagnosed with NFA. After fluid rehydaration, spasmolysis, and treatment with glucocorticoid and mechanical ventilation, the patient's condition improved temporarily.

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The study of protein subcellular localization (PSL) is a fundamental step toward understanding the mechanism of protein function. The recent development of mass spectrometry (MS)-based spatial proteomics to quantify the distribution of proteins across subcellular fractions provides us a high-throughput approach to predict unknown PSLs based on known PSLs. However, the accuracy of PSL annotations in spatial proteomics is limited by the performance of existing PSL predictors based on traditional machine learning algorithms.

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Background: Left ventricular thrombus is a rare condition, for which appropriate treatments are not extensively studied. Although it can be treated by thrombectomy, such surgery can be difficult and risky, and not every patient can tolerate the surgery.

Case Summary: We report a case of a middle-aged man receiving veno-arterial extracorporeal membrane oxygenation (VA-ECMO) for acute myocardial infarction who developed left ventricular thrombus despite systemic anticoagulation.

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  • This study analyzed the reproductive performance of 658 female rabbits from their first to sixth pregnancies (P1 to P6) and found that conception rates and litter sizes significantly declined by P6.
  • The ovarian health indicators, such as the number of primordial follicles and levels of various anti-oxidants, showed that P6 rabbits had poorer ovarian function compared to those in P1 and P2.
  • Transcriptome analysis revealed numerous differentially expressed genes between P2 and P6, indicating a molecular impact of parity on rabbit reproduction, which could inform strategies to enhance fertility in commercial rabbit systems.
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Mucosal-associated invariant T (MAIT) cells are important in antibacterial immune responses; however, during sepsis, they are few in number and exhibit highly activated phenotypes. The relationship between MAIT cells in peripheral blood and the prognosis of sepsis is not well understood. Thus, this study aimed to examine the levels and phenotypes of MAIT cells in early sepsis, evaluate their clinical relevance, and investigate their association with patient prognosis.

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Background: Sperm is formed through spermiogenesis, a highly complex process involving chromatin condensation that results in cessation of transcription. mRNAs required for spermiogenesis are transcribed at earlier stages and translated in a delayed fashion during spermatid formation. However, it remains unknown that how these repressed mRNAs are stabilized.

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Objective: To explore the efficacy and safety of different doses of dexmedetomidine (DEX) for epidural labor analgesia (ELA).

Methods: From June 2021 to June 2022, 147 parturients who underwent ELA in our hospital were selected and divided into low- (0.5 g/kg DEX), medium- (0.

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  • - For eutrophic water bodies, potassium permanganate is used to remove algae, and recycling the resulting manganese-rich drinking water sludge ash (DWSA) in concrete can provide environmental benefits.
  • - Research shows that incorporating 10% DWSA in concrete enhances strength and reduces shrinkage, especially when using a lower water-binder ratio (w/b), which also improves the concrete's microstructure at the nanoscale.
  • - Using DWSA not only decreases the overall carbon footprint and costs by up to 21% and 25% respectively, but also sheds light on optimizing the water-binder ratio for better concrete performance.
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Background And Aims: Combining biologically related traits in genome-wide association studies (GWAS) increases the power for genetic discovery. Given the established relationship between lobar intracerebral hemorrhage (ICH) and cerebral amyloid angiopathy (CAA), and between the latter and levels of cerebrospinal fluid amyloid-β 42 (CSF-Aβ42), we leveraged genetic predisposition for lower CSF-Aβ42 levels as a proxy phenotype for CAA to identify new genes associated with lobar ICH.

Methods: We used publicly available GWAS data for CSF-Aβ42 levels (n = 3146) and for lobar ICH (n = 2094).

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Hippocampal sclerosis (HS) is associated with advanced age as well as transactive response DNA-binding protein with 43 kDa (TDP-43) deposits. Both hippocampal sclerosis and TDP-43 proteinopathy have also been described in chronic traumatic encephalopathy (CTE), a neurodegenerative disease linked to exposure to repetitive head impacts (RHI). However, the prevalence of HS in CTE, the pattern of TDP-43 pathology, and associations of HS and TDP-43 with RHI are unknown.

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Age-related macular degeneration (AMD) has been implicated as a risk factor for severe consequences from COVID-19. We evaluated the genetic architecture shared between AMD and COVID-19 (critical illness, hospitalization, and infections) using analyses of genetic correlations and pleiotropy (i.e.

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