7,558 results match your criteria: "Peking University School[Affiliation]"

Cardiovascular diseases (CVDs) pose a serious threat to human health, with atherosclerosis being a leading cause of heart disease and stroke. Elevated cysteine (Cys) levels have been closely linked to an increased risk of cardiovascular diseases, underscoring its significance in cardiovascular health. However, current detection methods for cysteine in serum and atherosclerotic plaques present challenges in sensitivity, specificity, dynamic monitoring, and invasiveness.

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Aim: To examine the immune responses in patients diagnosed as grade C periodontitis during orthodontic treatment.

Materials And Methods: Our study included seven orthodontic patients with grade C periodontitis and measured their levels of inflammatory cytokines in gingival crevicular fluid and plasma before orthodontic treatment, during the alignment and levelling phase, and during the detailing and finishing phase. The key signal pathways in the orthodontic process of patients with periodontitis were detected by KEGG analysis.

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Chronic hyperplastic candidiasis (CHC) is a rare but severe subtype of oral candidiasis distinguished by its potential malignant transformation and suboptimal response to antifungal therapies. However, the cells and mechanisms that play key roles in this process remain unclear. Therefore, we performed the first single-cell RNA sequencing (scRNA-seq) analysis of CHC-affected tongue tissues to reveal the microenvironmental changes and immunological etiology of CHC.

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Up to 45% of patients surviving from transient global cerebral ischemia (GCI) after cardiac arrest develop post-global cerebral ischemia depression (PGCID), but how to treat PGCID is clinically unknown. Here we find that cannabinoid type-1 receptor (CBR) antagonists, CBR knockout and endocannabinoid (eCB) synthesis inhibition block acute stress-induced PGCID. Application of acute stress to GCI mice increases CBR activity from ventromedial prefrontal cortical (vmPFC) terminals synapsing with the basolateral amygdala (BLA) neurons, indicating the involvement of increased vmPFC-BLA synaptic eCB signaling in PGCID induction.

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Hierarchically mimicking outer tooth enamel for restorative mechanical compatibility.

Nat Commun

November 2024

School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, China.

Tooth enamel, and especially the outer tooth enamel, is a load-resistant shell that benefits mastication but is easily damaged, driving the need for enamel-restorative materials with comparable properties to restore the mastication function and protect the teeth. Synthesizing an enamel analog that mimics the components and hierarchical structure of natural tooth enamel is a promising way to achieve these comparable mechanical properties, but it is still challenging to realize. Herein, we fabricate a hierarchical enamel analog with comparable stiffness, hardness, and viscoelasticity as natural enamel by incorporating three hierarchies of outer tooth enamel based on hierarchical assembly of enamel-like hydroxyapatite hybrid nanowires with polyvinyl alcohol as a matrix.

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The aim of this study was to provide an overview of food texture modification to address dysphagia in patients with head and neck cancer, and the current application of these methods. A comprehensive search strategy was developed across five databases: PubMed, Embase, Web of Science Core Collection, CINAHL, and the Cochrane Library. The JBI guidance for scoping reviews was used to conduct a descriptive analysis of the literature and extract data.

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Adaptable Hydrogel with Strong Adhesion of Wet Tissue for Long-Term Protection of Periodontitis Wound.

Adv Mater

November 2024

State Key Laboratory of Chemical Resource Engineering, Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology, Ministry of Education), Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China.

Periodontitis is a severe gum infection characterized by inflammation of the tissues surrounding the teeth. The disease is challenging to manage due to its exposure to a wet and dynamic oral environment, where conventional hydrogels often suffer from weak adhesion, short residence time, and vulnerability to bacterial invasion. In this study, an innovative hydrogel system based on in situ light curing is proposed.

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Article Synopsis
  • The electrical properties of bone implants are crucial for influencing cell behavior and promoting bone regeneration, with previous studies indicating benefits from electric fields established between implants and bone tissues.
  • This research introduces a technique using a piezoelectric BaTiO (BTO) substrate that creates a 3D spatial electrical environment to enhance bone healing and integration.
  • The findings show that BTO micropillars positively affect mesenchymal stem cells by promoting their growth and differentiation, leading to faster bone repair in experimental models.
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Postoperative therapies for osteosarcoma present substantial challenges due to tumor recurrence and extensive bone defects. To tackle these challenges, laser powder bed fusion is utilized to fabricate biodegradable Zn-Li porous scaffolds that supress tumors and promote osteogenesis. After the structure design and composition selection, the Zn-0.

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Background: Cleft lip and palate (CLP) is one of the most common birth defects worldwide. It typically results in significant maxillary dysplasia, causing severe oral function problems and substantially affecting the patient's facial aesthetics. Maxillary anterior segmental distraction osteogenesis (MASDO) has gained popularity in recent years as an effective treatment for correcting maxillary dysplasia.

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Glia-like taste cells mediate an intercellular mode of peripheral sweet adaptation.

Cell

November 2024

School of Biological Sciences, Seoul National University, Seoul 08826, Republic of Korea; The Institute of Molecular Biology and Genetics, Seoul 08826, Republic of Korea. Electronic address:

The sense of taste generally shows diminishing sensitivity to prolonged sweet stimuli, referred to as sweet adaptation. Yet, its mechanistic landscape remains incomplete. Here, we report that glia-like type I cells provide a distinct mode of sweet adaptation via intercellular crosstalk with chemosensory type II cells.

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Aims: This research sought to assess the efficacy of Bacillus subtilis (B. subtilis) R0179 and explore potential metabolites in mitigating experimental periodontitis in mice induced by Porphyromonas gingivalis (P. gingivalis) ATCC 33277.

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Enhanced Photothermal Therapy under Low-Power Near-Infrared Irradiation Enabled by a Si-Cyclopentadithiophene-Based Organic Molecule.

Adv Healthc Mater

November 2024

Department of General Dentistry II, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials & Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, 100081, PR China.

Due to the inadequate photothermal conversion efficiency (PCE), most photothermal agents (PTAs) have to be used under high-power near-infrared (NIR) irradiation, which significantly exceeds medical safety standards, for achieving effective photothermal therapy (PTT) in antitumor treatment. This significantly hinders practical PTT application. Herein, three acceptor-donor-acceptor(A-D-A)-type molecules are synthesized based on cyclopentadithiophene unit to develop effective PTAs.

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Article Synopsis
  • The study evaluated the effectiveness and accuracy of 3D-printed surgical plates for reconstructing mandibular defects compared to traditional plates, involving both prospective and retrospective research designs.
  • A total of 20 patients (10 in each group) who received vascularized bone grafts were assessed for flap survival, complications, and facial appearance post-surgery.
  • Results showed that while overall outcomes were similar, 3D-printed plates improved the position and shape of the lower mandibular border, highlighting their safe and effective application in individualized mandibular reconstruction.
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Aging impairs bone marrow mesenchymal stem cell (BMSC) functions as well as associated angiogenesis which is critical for bone regeneration and repair. Hence, repairing bone defects in elderly patients poses a formidable challenge in regenerative medicine. Here, the engineered dental pulp stem cell-derived exosomes loaded with the natural derivative of adenosine Cordycepin (CY@D-exos) are fabricated by means of the intermittent ultrasonic shock, which dually rejuvenates both senescent BMSCs and endothelial cells and significantly improve bone regeneration and repair in aged animals.

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Biological Effects and Clinical Application of the Anti-Immunoglobulin E Antibody.

Int Arch Allergy Immunol

November 2024

Department of Dermatology and Venereology, Beijing Jishuitan Hospital, Capital Medical University, Beijing, China.

Background: Immunoglobulin E (IgE) plays a pivotal role in the pathogenesis of allergic diseases by engaging with FcεRI and FcεRII receptors, triggering allergic responses. The development of anti-IgE antibodies, such as omalizumab, has introduced a targeted approach to allergy treatment by neutralizing free IgE and dampening the allergic cascade.

Summary: This review synthesizes the current understanding of IgE's role in allergic diseases and evaluates the clinical utility of omalizumab.

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The optional apex sites for quad zygomatic implant placement in edentulous patients with severe alveolar bone resorption: a CBCT anatomical analysis.

BMC Oral Health

November 2024

Department of Oral and Maxillofacial Surgery, National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Peking University School and Hospital of Stomatology, No. 22 Zhongguancun South Avenue, Haidian District, Beijing, PR China.

Objective: To investigate the difference in bone-implant contact (BIC) and the rate of infratemporal fossa intrusion among different apex sites for quad zygomatic implants (ZIs) design in edentulous patients with severe alveolar bone resorption.

Methods: Patients with maxillary edentulism were evaluated. Alveolar bone resorption was assessed using the Cawood and Howell classification.

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Article Synopsis
  • Traditional tooth image analysis often misses important information about tooth shape and position by focusing solely on feature extraction from individual images.
  • The proposed Co-Mask R-CNN method enhances analysis by processing both original and edge-enhanced images simultaneously through a collaborative learning strategy, using an attention mechanism to fuse their features effectively.
  • Experimental results show that Co-Mask R-CNN significantly outperforms other segmentation networks, providing more accurate and robust tooth segmentations, which can improve diagnosis and treatment in dental care.
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Research progress of proteomics in congenital craniofacial anomalies.

J Clin Pediatr Dent

November 2024

Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, 710004 Xi'an, Shaanxi, China.

Congenital craniofacial anomalies (CFAs) are among the most common birth defects, significantly affecting the appearance, oral function and mental health of patients. These anomalies are etiologically complex, involving genetics, environmental factors and gene-environment interactions. While genetic studies have identified numerous potential causal genes/risk loci for CFAs, the pathogenic mechanisms still largely remain elusive.

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Collagen films play an essential role in guided bone-regeneration (GBR) techniques, which create space, promote cell adhesion, and induce osteogenic differentiation. It is therefore crucial to design appropriate GBR films to facilitate bone regeneration. However, current electrospun collagen scaffolds used as bioactive materials have limited clinical applications due to their poor mechanical properties.

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[Neuroimmune mechanism of rosacea].

Zhonghua Yu Fang Yi Xue Za Zhi

November 2024

Department of Dermatology and Venerology, Peking University First Hospital, National Clinical Research Center for Skin and lmmune Diseases, Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing100034, China.

The neuroimmune mechanism of rosacea has not been fully elucidated, and it is believed that the innate immune system, immune cells, immune regulation, neuroimmune system, signaling pathway abnormalities and microbial dysbiosis are involved in the progress of the neuroimmune mechanism of rosacea. This article reviews the neuroimmune mechanism of rosacea.

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Article Synopsis
  • Researchers aimed to develop a new minimally invasive computer-assisted workflow for placing zygomatic implants, combining static positioning with dynamic adjustments for precision.
  • The study involved 14 aging patients, with careful measurements taken to compare the planned and actual implant placements using advanced imaging techniques.
  • Results showed that the new method was accurate and effective, with all implants remaining stable over more than a year's follow-up, demonstrating its clinical utility and safety.
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Spatiotemporal Molecular Architecture of Lineage Allocation and Cellular Organization in Tooth Morphogenesis.

Adv Sci (Weinh)

December 2024

Department of Geriatric Dentistry, Beijing Laboratory of Biomedical Materials, Peking University School and Hospital of Stomatology, Beijing, 100081, P. R. China.

Article Synopsis
  • The study focuses on the complex development of teeth in vertebrates, utilizing advanced genomic techniques to explore how teeth are formed and organized over time and space.
  • It identifies twelve spatial compartments and seventeen unique cell clusters that play crucial roles in tooth development, revealing that most lineage species appear earlier in the tooth bud than previously thought.
  • The research uncovers a new mode of tooth tissue arrangement and highlights the interplay between mechanical signals and biochemical processes in driving tooth formation, while also linking genes to tooth abnormalities.
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Optimization of grinding parameters in robotic-assisted preparation of cracked teeth based on fracture mechanics: FEA and experiment.

Comput Methods Programs Biomed

January 2025

National Engineering Laboratory for Digital and Material Technology of Stomatology, Peking University School of Stomatology, Beijing, 100081, PR China; Peking University School of Stomatology, Peking, 100081, PR China.

Article Synopsis
  • Cracked teeth, if untreated, can lead to a high likelihood of tooth loss (70%), and while dental preparation is a known solution, traditional methods pose challenges for dentists.
  • The study introduces a grinding parameter optimization strategy to enhance the effectiveness of a tooth preparation robot (TPR) by controlling preparation depth and direction, utilizing advanced observation and simulation technologies.
  • Results show that optimizing preparation parameters reduces crack extension and improves the reliability of the TPR, providing a safer and more effective tool for dentists during procedures involving cracked teeth.
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Oral health is essential to general health. The diagnosis of dental diseases and treatment planning of dental care need to be straightforward and accurate. Recent studies have reported the use of aptamers in dentistry to achieve a simple diagnosis and facilitate therapy.

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