104 results match your criteria: "University of Minnesota at Twin Cities.[Affiliation]"

Evaluating the ability of large language models to emulate personality.

Sci Rep

January 2025

Shanghai Institute of AI for Education, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China.

For social sciences, recent advancements in Large Language Models (LLMs) have the potential to revolutionize the study of human behaviors by facilitating the creation of realistic agents characterized by a diverse range of individual differences. This research presents novel simulation studies assessing GPT-4's ability to role-play real-world individuals with diverse big five personality profiles. In simulation 1, emulated personality responses exhibited superior internal consistency, but also a more distinct and structured factor organization compared to the human counterparts they were based on.

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Article Synopsis
  • The paper focuses on improving the estimation of the central space crucial for sufficient dimension reduction (SDR), especially in the presence of collinear predictors.
  • The authors introduce a generalized envelope model, allowing for semiparametric estimation without strong distributional assumptions, enhancing flexibility in statistical analyses.
  • Their new methods, shown to be robust and accurate through simulations, suggest improvements in predictive capabilities, demonstrating practical applications in a heart failure study and potential synergy with machine learning techniques.
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Lysine 5-hydroxylation (5-Hyl) has been well recognized as an essential protein post-translational modification regulating cellular structural stability, RNA alternative splicing and epigenetic gene expression. System-wide enrichment and quantification of 5-Hyl targets have been challenging due to their chemical inert nature and difficulties in differentiating structural isomers in a complex biological sample. Here, we report the development of an efficient chemical proteomic workflow for affinity enrichment and constitutional isomer specific profiling of endogenous 5-Hyl substrates based on highly selective periodate chemistry.

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Normobaric Hyperoxia Combined with Endovascular Treatment in Patients with Acute Ischemic Stroke (OPENS-2) Trial: Protocol for a Prospective, Multicenter, Randomized Controlled Study.

Cerebrovasc Dis

September 2024

Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China.

Normobaric hyperoxia (NBO) is a potentially promising stroke treatment strategy that could protect the ischemic penumbra and could be administered as an adjunct before vascular recanalization. However, the efficacy and safety of NBO have not been confirmed by randomized controlled trials. The study aims to assess the efficacy and safety of NBO for ischemic stroke due to large artery occlusion (LVO) of acute anterior circulation among patients who had endovascular treatment (EVT) and were randomized within 6 h from symptom onset.

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Article Synopsis
  • Lysine L-lactylation (K) is a new type of protein modification that is influenced by L-lactate and has three isomers often confused in research.
  • Two methods are introduced to differentiate these isomers: one involves chemical derivatization combined with high-performance liquid chromatography, and the other uses specific antibodies for accurate identification.
  • The study finds that K is primarily present in histones and is mainly regulated by glycolysis, indicating a significant link between this modification and metabolic processes like the Warburg effect.
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Spatiotemporal regulation of gene expression by polycomb repressive complex 2 (PRC2) is critical for animal and plant development. The Arabidopsis fertilization independent seed (FIS)-PRC2 complex functions specifically during plant reproduction from gametogenesis to seed development. After a double fertilization event, triploid endosperm proliferates early, followed by the growth of a diploid embryo, which replaces the endosperm in Arabidopsis and many dicots.

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Normobaric Hyperoxia Combined With Endovascular Treatment Based on Temporal Gradient: A Dose-Escalation Study.

Stroke

June 2024

Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders (W.L., J.L., M.W., X.J.).

Article Synopsis
  • - The study investigates the optimal duration of normobaric hyperoxia (NBO) treatment combined with endovascular therapy for patients suffering from acute ischemic stroke, conducted at Tianjin Huanhu Hospital with 100 participants randomly assigned to four treatment groups.
  • - Results show that both the NBO-4h and NBO-6h groups exhibited a significant reduction in cerebral infarct volumes and improved stroke severity scores compared to the control, indicating that longer durations of NBO could enhance neuroprotection.
  • - The trial found no significant differences in safety outcomes such as 90-day mortality rates and severe adverse events across all groups, suggesting that NBO therapy can be safely administered alongside standard treatments for ischemic stroke. *
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Importance: Evidence supports using antiplatelet therapy in patients with acute ischemic stroke. However, neurological deterioration remains common under the currently recommended antiplatelet regimen, leading to poor clinical outcomes.

Objective: To determine whether intravenous tirofiban administered within 24 hours of stroke onset prevents early neurological deterioration in patients with acute noncardioembolic stroke compared with oral aspirin.

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Background And Rationale: Cerebral venous thrombosis (CVT) is a rare cerebrovascular disorder that mainly affects young and middle-aged adults. Epidemiological data on the incidence, risk factors, diagnosis, treatment, and prognosis of CVT are lacking in China. In addition, there is a lack of evidence from large, multicenter, real-world studies on the efficacy and safety of endovascular.

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Mitotic DNA Synthesis in Untransformed Human Cells Preserves Common Fragile Site Stability via a FANCD2-Driven Mechanism That Requires HELQ.

J Mol Biol

November 2023

Department of Genetics, Cell Biology and Development, Medical School, University of Minnesota at Twin Cities, Minneapolis, MN 55455, USA; Masonic Cancer Center, Minneapolis, MN 55455, USA. Electronic address:

Faithful genome duplication is a challenging task for dividing mammalian cells, particularly under replication stress where timely resolution of late replication intermediates (LRIs) becomes crucial prior to cell division. In human cancer cells, mitotic DNA repair synthesis (MiDAS) is described as a final mechanism for the resolution of LRIs to avoid lethal chromosome mis-segregation. RAD52-driven MiDAS achieves this mission in part by generating gaps/breaks on metaphase chromosomes, which preferentially occur at common fragile sites (CFS).

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Beyond Ion Homeostasis: Hypomagnesemia, Transient Receptor Potential Melastatin Channel 7, Mitochondrial Function, and Inflammation.

Nutrients

September 2023

Cardiovascular Division, Department of Medicine, The Lillehei Heart Institute, University of Minnesota at Twin Cities, Minneapolis, MN 55455, USA.

Article Synopsis
  • Magnesium (Mg) is a vital intracellular ion that supports essential cellular functions, including ATP production and protein synthesis, while playing a key role in cardiovascular health.
  • A decline in Mg intake in developed countries, largely due to processed foods, has led to hypomagnesemia (HypoMg), which is linked to serious cardiovascular issues and increased mortality risk.
  • Research indicates that HypoMg causes mitochondrial dysfunction and inflammation, and may be treated through Mg supplementation and inhibition of the TRPM7 kinase, potentially benefiting a broad range of diseases associated with oxidative stress and inflammation.
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Heparan sulfate (HS) and chondroitin sulfate (CS) are evolutionarily conserved glycosaminoglycans that are found in most animal species, including the genetically tractable model organism Drosophila. In contrast to extensive in vivo studies elucidating co-receptor functions of Drosophila HS proteoglycans (PGs), only a limited number of studies have been conducted for those of CSPGs. To investigate the global function of CS in development, we generated mutants for Chondroitin sulfate synthase (Chsy), which encodes the Drosophila homolog of mammalian chondroitin synthase 1, a crucial CS biosynthetic enzyme.

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Despite recent methodology advancements in clinical natural language processing (NLP), the adoption of clinical NLP models within the translational research community remains hindered by process heterogeneity and human factor variations. Concurrently, these factors also dramatically increase the difficulty in developing NLP models in multi-site settings, which is necessary for algorithm robustness and generalizability. Here, we reported on our experience developing an NLP solution for Coronavirus Disease 2019 (COVID-19) signs and symptom extraction in an open NLP framework from a subset of sites participating in the National COVID Cohort (N3C).

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TRPM7 kinase mediates hypomagnesemia-induced seizure-related death.

Sci Rep

May 2023

Cardiovascular Division, Department of Medicine, The Lillehei Heart Institute, University of Minnesota at Twin Cities, 2231 6th Street SE, CCRB 4-141, Minneapolis, MN, 55455, USA.

Hypomagnesemia (HypoMg) can cause seizures and death, but the mechanism is unknown. Transient receptor potential cation channel subfamily M 7 (TRPM7) is a Mg transporter with both channel and kinase function. In this study, we focused on the kinase role of TRPM7 in HypoMg-induced seizures and death.

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Shotgun proteomics has been widely used to identify histone marks. Conventional database search methods rely on the "target-decoy" strategy to calculate the false discovery rate (FDR) and distinguish true peptide-spectrum matches (PSMs) from false ones. This strategy has a caveat of inaccurate FDR caused by the small data size of histone marks.

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Avidity-Based Method for the Efficient Generation of Monoubiquitinated Recombinant Proteins.

J Am Chem Soc

April 2023

Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States.

Monoubiquitination of proteins governs diverse physiological processes, and its dysregulation is implicated in multiple pathologies. The difficulty of preparing sufficient material often complicates the biophysical studies of monoubiquitinated recombinant proteins. Here we describe a robust avidity-based method that overcomes this problem.

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Occurrence and risk of iodinated X-ray contrast media in source and tap water from Jiangsu province, China.

J Hazard Mater

February 2023

School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, P.R. China; College of Ecological and Resource Engineering, Fujian Provincial Key laboratory of Eco-Industrial Green Technology, Wuyi University, Wuyishan, Fujian 354300, P.R. China. Electronic address:

Microcontaminants in the water environment have received increasing attention due to their adverse effects on human health and wildlife. However, iodinated X-ray contrast media (ICM), a type of microcontaminants, have not yet been systematically documented in source and tap water. This study investigated ICM in water samples via a sampling activity from 25 drinking water sources and their corresponding 30 household taps in south-central Jiangsu Province, China.

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Evolution is driven by various mechanisms. A directional increase in the embryo to endosperm ratio is an evolutionary trend within the angiosperms. The endosperm constitutes a major portion of the seed volume in Poales and some dicots.

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HypDB: A functionally annotated web-based database of the proline hydroxylation proteome.

PLoS Biol

August 2022

Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota at Twin Cities, Minneapolis, Minnesota, United States of America.

Proline hydroxylation (Hyp) regulates protein structure, stability, and protein-protein interaction. It is widely involved in diverse metabolic and physiological pathways in cells and diseases. To reveal functional features of the Hyp proteome, we integrated various data sources for deep proteome profiling of the Hyp proteome in humans and developed HypDB (https://www.

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Content analysis is a common and flexible technique to quantify and make sense of qualitative data in psychological research. However, the practical implementation of content analysis is extremely labor-intensive and subject to human coder errors. Applying natural language processing (NLP) techniques can help address these limitations.

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Social-emotional learning (SEL) is an educational model for improving social-emotional competences of all students and a long-term education program connecting school, home, and community. Although there has been active research to establish evidence-based practice (EBP) of SEL programs worldwide, the quality of SEL intervention studies which is an integral part of evaluating EBP was rarely investigated. In addition, prior meta-analytic studies focused only on the effectiveness of SEL programs conducted in Western society.

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Normobaric Hyperoxia Combined With Endovascular Treatment for Patients With Acute Ischemic Stroke: A Randomized Controlled Clinical Trial.

Neurology

August 2022

From the Cerebrovascular Diseases Research Institute (W.L., Z.Q., X.J.) and the Departments of Neurology (Q.M., Jiayue Ding, C.W., H.S., L.W., K.J., W.Z., C.S., N.L.), Radiology (Q.Y.), Emergency (Jiangang Duan, C.L.), and Neurosurgery (X.J.), Xuanwu Hospital of Capital Medical University, Beijing; Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology (W.L., X.J.), Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China; School of Statistics (L.L.), University of Minnesota at Twin Cities, Minneapolis; Department of Internal Medicine (H.K.), University of New Mexico, Albuquerque; Department of Neurology (M.F.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; and Department of Pharmaceutical Sciences (K.J.L.), University of New Mexico Health Sciences Center, Albuquerque.

Background And Objectives: To investigate the safety and efficacy of normobaric hyperoxia (NBO) combined with endovascular treatment (EVT) in patients with acute ischemic stroke (AIS).

Methods: In this single-center, proof-of-concept, assessor-blinded, randomized, controlled pilot study, patients with AIS in the acute anterior circulation with large vessel occlusion who had an indication for EVT were randomly assigned to the EVT group or the NBO + EVT group. The NBO + EVT group was given 100% oxygen through a face mask initiated before vascular recanalization (10L/min for 4 hours), while the EVT group was given room air.

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WRKY transcription factors are known mostly for their function in plant defense, abiotic stress responses, senescence, seed germination, and development of the pollen, embryo, and seed. Here, we report the regulatory functions of two WRKY proteins in photomorphogenesis and expression. PIF4 is a critical signaling hub in light, temperature, and hormonal signaling pathways.

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Intrinsic features of Zika Virus non-structural proteins NS2A and NS4A in the regulation of viral replication.

PLoS Negl Trop Dis

May 2022

Jiangsu Key Laboratory of Molecular Medicine, Medical school, Nanjing University, Nanjing, Jiangsu, China.

Zika virus (ZIKV) is a mosquito-borne flavivirus and can cause neurodevelopmental disorders in fetus. As a neurotropic virus, ZIKV persistently infects neural tissues during pregnancy but the viral pathogenesis remains largely unknown. ZIKV has a positive-sense and single-stranded RNA genome, which encodes 7 non-structural (NS) proteins, participating in viral replication and dysregulation of host immunity.

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Concomitant pyroptotic and apoptotic cell death triggered in macrophages infected by Zika virus.

PLoS One

April 2022

Department of Veterinary Biomedical Sciences, College of Veterinary Medicine, University of Minnesota at Twin Cities, Saint Paul, Minnesota, United States of America.

Zika virus (ZIKV) is a positive-sense RNA flavivirus and can cause serious neurological disorders including microcephaly in infected fetuses. As a mosquito-borne arbovirus, it enters the bloodstream and replicates in various organs. During pregnancy, it can be transmitted from the blood of the viremic mother to the fetus by crossing the placental barrier.

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