Publications by authors named "Leilei Zheng"

Background: The COVID-19 pandemic significantly challenged the global healthcare system, especially frontline healthcare professionals, such as those working in intensive care units (ICUs). In late 2022, a sudden increase in COVID-19 cases in China led to a large number of ICU admissions, requiring new ICU staff (non-ICU professionals to work in ICUs), exacerbating their stress. This study aimed to develop an effective stress management strategy for new ICU professionals, focusing on reducing the detrimental effects of stress on their psychological state.

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Orthodontic tooth movement (OTM) depends on periodontal ligament cells (PDLCs), which sense biomechanical stimuli and initiate alveolar bone remodeling. Light (optimal) forces accelerate OTM, whereas heavy forces decelerate it. However, the mechanisms by which PDLCs sense biomechanical stimuli and affect osteoclastic activities under different mechanical forces (MFs) remain unclear.

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Social functioning impairment is a core symptom of schizophrenia (SCZ). Yet, the computational and neural mechanisms of social coordination in SCZ under real-time and naturalistic settings are poorly understood. Here, we instructed patients with SCZ to coordinate with a healthy control (HC) in a joint finger-tapping task, during which their brain activity was measured by functional near-infrared spectroscopy simultaneously.

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Atopic dermatitis (AD) is an immune-related skin disease with a genetic background. Numerous loci have been identified associated with AD to better comprehend its complicated genetic mechanisms by genome‑wide association studies (GWASs). However, current studies reveal the underlying mechanisms of these loci in the pathogenesis of AD inadequately.

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  • This study evaluated how different jaw movements and torque adjustments during mandibular advancement with clear aligners impact biomechanics using finite element analysis.
  • Models simulated the mandible, teeth, periodontal ligament (PDL), and clear aligners, incorporating forces from specific oral muscles during various jaw movements and torque compensation angles.
  • Results showed that maintaining a mandibular advancement distance close to the occlusal opening distance helped distribute stress evenly, while excessive opening increased stress and altered tooth positioning, highlighting the need for careful torque and movement control to ensure periodontal health.
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Introduction: With a shift in orthodontics from a more traditional biomedical model toward a more biopsychosocial model, orthodontists must understand their patients' psychological condition. This study aimed to investigate treatment motivation, psychosocial impact from malocclusion, and perfectionism in children and adult orthodontic patients and to examine the relationships among these various factors.

Methods: A total of 193 participants (114 children and 79 adults) were included.

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Diabetes mellitus has been widely acknowledged to have a negative effect on the osteoblastic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs). However, the underlying epigenetic mechanisms associated with this process remain to be elucidated. The goal of the present study was to investigate the effect of diabetes mellitus on the osteoblastic differentiation of BMSCs and assess the role of histone methylation in the observed phenomena.

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Purpose: Oxidative stress and mitochondrial dysfunction are potential contributors to the compromised tissue regeneration capacity of alveolar bone in diabetic patients. Berberine, an active plant alkaloid, exhibits multiple pharmacological effects including antioxidation, blood glucose- and blood lipid-lowering properties. However, it remains uncertain whether berberine can improve impaired osteogenesis in type 2 diabetes mellitus (T2DM), and its poor solubility and oral bioavailability also constrain its applications in bone regeneration.

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  • The dynamics and chemistry at the electrolyte/metal interface are crucial for the reversible deposition and dissolution of zinc in battery systems.
  • Different cationic ammonium-based additives can enhance this interfacial chemistry, leading to better performance in zinc anodes.
  • Specifically, tetramethylammonium shows a unique ability to stabilize the solvation shell around zinc, resulting in significantly improved efficiency and long-lasting performance in both symmetric and asymmetric battery configurations.
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Assessing the glymphatic system activity using diffusion tensor imaging analysis along with the perivascular space (DTI-ALPS) may be helpful to understand the pathophysiology of moyamoya disease (MMD). 63 adult patients with MMD and 20 healthy controls (HCs) were included for T1-weighted images, T2-FLAIR, pseudocontinuous arterial spin labeling, and DTI. 60 patients had digital subtraction angiography more than 6 months after combined revascularization.

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  • Deep vein thromboembolism (DVT) is a serious complication after spinal surgery, prompting the need for effective prevention strategies, particularly using machine learning (ML) for predicting DVT risk.
  • This study analyzed records from 500 patients undergoing elective spinal surgery to identify key risk factors for DVT and created five ML models, with the random forest classifier performing the best in predicting outcomes.
  • The research identified seven significant variables (like age, BMI, and anesthesia time) that contribute to DVT risk, highlighting the potential of ML in improving patient care after spinal procedures.
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Background: Periodontal ligament stem cells (PDLSCs) are important seed cells in tissue engineering and clinical applications. They are the priority receptor cells for sensing various mechanical stresses. Yes-associated protein (YAP) is a recognized mechanically sensitive transcription factor.

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The cervical vertebral maturation (CVM) method is essential to determine the timing of orthodontic and orthopedic treatment. In this paper, a target detection model called DC-YOLOv5 is proposed to achieve fully automated detection and staging of CVM. A total of 1800 cephalometric radiographs were labeled and categorized based on the CVM stages.

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Inflammatory bowel disease (IBD) is a chronic disease that includes Crohn's disease (CD) and ulcerative colitis (UC). Although genome-wide association studies (GWASs) have identified many relevant genetic risk loci, the impact of these loci on protein abundance and their potential utility as clinical therapeutic targets remain uncertain. Therefore, this study aimed to investigate the pathogenesis of IBD and identify effective therapeutic targets through a comprehensive and integrated analysis.

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Background: Pharmacotherapy is one of the primary treatment modalities for depression. However, there is considerable variability in the individual response to antidepressant medications. Personalized medicine guided by pharmacogenomic testing may hold promise in addressing this issue.

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  • - The study aimed to categorize psoriasis into three distinct subtypes (A-C) based on gene expression profiles from skin samples to improve personalized treatment options for patients.
  • - Subtype A showed high immune activation, subtype B had moderate activity, and subtype C was linked to tissue proliferation, each responding differently to various treatments like methotrexate and biologics.
  • - The findings highlight the importance of understanding the molecular differences among psoriasis subtypes to optimize treatment strategies for individuals, potentially leading to better outcomes.
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Introduction: This study aimed to evaluate and compare the performance of 2 artificial intelligence (AI) models, Chat Generative Pretrained Transformer-3.5 (ChatGPT-3.5; OpenAI, San Francisco, Calif) and Google Bidirectional Encoder Representations from Transformers (Google Bard; Bard Experiment, Google, Mountain View, Calif), in terms of response accuracy, completeness, generation time, and response length when answering general orthodontic questions.

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Background: Major depressive disorder (MDD) is a leading mental disorder causing severe impairment. This study was aimed to evaluate sex difference in global MDD incidence by year, age, and socioeconomic status, according to the Global Burden of Disease Study 2019 (GBD 2019).

Methods: Global and national sex-specific incidence estimates of MDD, from 1990 to 2019, in different age groups, were extracted from the GBD 2019.

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Background: Diabetes mellitus (DM) and periodontitis are two prevalent diseases with mutual influence. Accumulation of advanced glycation end products (AGEs) in hyperglycemia may impair cell function and worsen periodontal conditions. N-methyladenosine (mA) is an important post-transcriptional modification in RNAs that regulates cell fate determinant and progression of diseases.

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PRMT1 deficiency leads to severely compromised craniofacial development in neural crest cells and profound abnormalities of the craniofacial tissues. Here, we show PRMT1 controls several key processes in calvarial development, including frontal and parietal bone growth rate and the boundary between sutural and osteogenic cells. Pharmacologic PRMT1 inhibition suppresses MC3T3-E1 cell viability and proliferation and impairs osteogenic differentiation.

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Background: The aim of this retrospective study was to compare the efficacy of concentrated growth factor (CGF) and platelet-rich fibrin (PRF) as scaffolds in regenerative endodontic therapy (RET).

Methods: Necrotic immature permanent teeth treated with regenerative endodontic therapy during January 2018 to August 2022 were divided into the CGF and PRF groups according to the scaffold. The CGF and PRF groups included 7 and 6 teeth, respectively.

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Rechargeable aqueous zinc-metal batteries (AZBs) are a promising complimentary technology to the existing lithium-ion batteries and the re-emerging lithium-metal batteries to satisfy the increasing demands on energy storage. Despite considerable progress achieved in the past years, the fundamental understanding of the solid-electrolyte interphase (SEI) formation and how its composition influences the SEI properties are limited. This review highlights the functionalities of anion-tuned SEI on the reversibility of zinc-metal anode, with a specific emphasis on new structural insights obtained through advanced characterizations and computational techniques.

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Background: Controlling the 3D movement of central incisors during tooth extraction cases with clear aligners is important but challenging in invisible orthodontic treatment. This study aimed to explore the biomechanical effects of central incisors in tooth extraction cases with clear aligners under different power ridge design schemes and propose appropriate advice for orthodontic clinic.

Methods: A series of Finite Element models was constructed to simulate anterior teeth retraction or no retraction with different power ridge designs.

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Background: Orthodontic space closure of extraction sites can be initiated early, within 1-week post-extraction, or it can be delayed for a month or more.

Objective: This systematic review aimed to evaluate the effect of early versus delayed initiation of space closure after tooth extraction on the rate of orthodontic tooth movement.

Search Methods: Unrestricted search of 10 electronic databases was conducted until September 2022.

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