2,641 results match your criteria: " Peking University[Affiliation]"

Article Synopsis
  • * Despite their effectiveness, there is rising concern about the incidence of interstitial lung disease or pneumonitis (ILD/p) linked to anti-HER2 ADCs, with varying mortality rates reported in studies.
  • * A panel of Chinese experts has developed guidelines for diagnosing and managing ILD/p in patients undergoing anti-HER2 ADC therapy to improve clinical practice and patient outcomes.
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Neohesperidin alleviates the inhibitory effect of bisphenol A on the myogenic differentiation of umbilical cord mesenchymal stem cells via the IGF1R/AKT1/RHOA signaling pathway.

Ecotoxicol Environ Saf

September 2024

College of Life Science, Shanxi Agricultural University, Taigu, Shanxi 030801, China; College of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, China; Center of Experiment Teaching, Shanxi Agricultural University, Taigu, Shanxi 030801, China. Electronic address:

Bisphenol A (BPA), a typical environmental endocrine disruptor, has raised concerns among researchers due to its toxicological effects. Whether neohesperidin (NEO) can intervene in the toxic effects of BPA remains unknown. This study aims to investigate the effects and mechanisms of NEO on the myogenic differentiation of umbilical cord-derived mesenchymal stem cells (UC-MSCs) exposed to BPA.

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Selective Ligase-Based Sample Processing-Free Discrimination and Detection of Site-Specific DNA 5-Hydroxymethylcytosine.

Anal Chem

August 2024

Department of Chemical Biology, Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Beijing Advanced Innovation Center for Genomics, Peking University, Beijing 100871, China.

Accurate detection of site-specific 5-hydroxymethylcytosine (5hmC) in genomic DNA is of great significance, but it is technically challenging to directly distinguish very low levels of 5hmC from their abundant cytosine/5-methylcytosine (C/5mC) analogues. Herein, we wish to propose a selective ligase-mediated mechanism (SLim) that can directly discriminate 5hmC from C/5mC with a high specificity without the use of any sample processing protocol. In this new design, we discovered that HiFi Taq DNA Ligase can well tolerate the mismatched 5hmC/A base-pairing and then effectively ligate the associated nicking site while the mismatched 5mC/A or C/A pairs cannot be recognized by HiFi Taq DNA Ligase, providing a new way for direct and selective discriminating 5hmC from its similar analogues.

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Background: Identifying effective pharmacological interventions to prevent the progressive enlargement and rupture of aortic aneurysms (AAs) is critical. Previous studies have suggested links between metformin use and a decreased incidence of AAs. In this study, we employed Mendelian randomization (MR) to investigate causal effects of metformin's targets on AA risk and to explore the underlying mechanisms underlying these effects.

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Measurements of Normalized Differential Cross Sections of Inclusive η Production in e^{+}e^{-} Annihilation at Energy from 2.0000 to 3.6710 GeV.

Phys Rev Lett

July 2024

State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.

Using data samples collected with the BESIII detector operating at the BEPCII storage ring, the cross section of the inclusive process e^{+}e^{-}→η+X, normalized by the total cross section of e^{+}e^{-}→hadrons, is measured at eight center-of-mass energy points from 2.0000 to 3.6710 GeV.

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Transcriptome-wide m6A methylation profile reveals its potential role underlying drought response in wheat (Triticum aestivum L.).

Planta

July 2024

State Key Laboratory of Crop Stress Biology in Arid Areas, College of Agronomy and Northwest, A&F University, Yangling, 712100, Shaanxi, China.

Article Synopsis
  • The study examines how m6A methylation in wheat is affected by drought stress, finding that TaETC9 may help regulate drought tolerance through RNA methylation.
  • Researchers identified 4221 m6A peaks in 3733 genes, with 373 peaks showing different expressions under drought conditions compared to control conditions.
  • The results indicate that higher levels of m6A are linked to increased mRNA abundance, and the deletion of TaETC9 increased drought sensitivity, suggesting its essential role in drought resistance in wheat.
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Background: The majority of colorectal cancer (CRC) cases develop from precursor advanced adenoma (AA). With the development of proteomics technologies, blood protein biomarkers have potential applications in the early screening of AA and CRC in the general population.

Aim: To identify serum protein biomarkers for the early screening of AA and CRC.

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-methyladenosine (mA) RNA modification is the most prevalent form of RNA methylation and plays a crucial role in plant development. However, our understanding of mA modification in Masson pine ( Lamb.) remains limited.

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A carboxymethyl-resistant starch/polyacrylic acid semi-IPN hydrogel with excellent adhesive and antibacterial properties for peri-implantitis prevention.

Colloids Surf B Biointerfaces

October 2024

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; Sports & Medicine Integration Research Center (SMIRC), Capital University of Physical Education and Sports, Beijing 100191, China. Electronic address:

Article Synopsis
  • * A new semi-interpenetrating hydrogel (CMRS/PAA) was developed, showing a strong mechanical strength of 67.317 kPa and good adhesion of 63 kPa, along with a porous structure.
  • * The hydrogel can release the antibiotic ciprofloxacin effectively in weakly acidic conditions, achieving over 90% release in 72 hours and demonstrating over 99% effectiveness against the bacteria P. gingivalis, making it a potential anti-infective solution for dental implants.
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Background: The mitosis-to-meiosis switch during spermatogenesis requires dynamic changes in gene expression. However, the regulation of meiotic transcriptional and post-transcriptional machinery during this transition remains elusive.

Results: We report that methyltransferase-like protein 16 (METTL16), an N6-methyladenosine (m6A) writer, is required for mitosis-to-meiosis transition during spermatogenesis.

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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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Development and validation of a nomogram for predicting anorexia of aging in older people.

Appetite

October 2024

School of Public Health, Peking University, Beijing, China; China Center for Health Development Studies, Peking University, Beijing, China. Electronic address:

Background: Anorexia of aging (AA) is a common geriatric syndrome that seriously endangers the health of older adults. Early identification of populations at risk of AAand the implementation of appropriate intervention measures hold significant public health importance. This study aimed to develop a nomogram for predicting the risk of AA among older people.

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Dissecting diazirine photo-reaction mechanism for protein residue-specific cross-linking and distance mapping.

Nat Commun

July 2024

Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, China.

While photo-cross-linking (PXL) with alkyl diazirines can provide stringent distance restraints and offer insights into protein structures, unambiguous identification of cross-linked residues hinders data interpretation to the same level that has been achieved with chemical cross-linking (CXL). We address this challenge by developing an in-line system with systematic modulation of light intensity and irradiation time, which allows for a quantitative evaluation of diazirine photolysis and photo-reaction mechanism. Our results reveal a two-step pathway with mainly sequential generation of diazo and carbene intermediates.

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Background: Allergic rhinitis (AR) is a complex disease in which gene-environment interactions contribute to its pathogenesis. Epigenetic modifications, such as N6-methyladenosine (m6A) modification of mRNA, play important roles in regulating gene expression in multiple physiological and pathological processes. However, the function of m6A modification in AR and the inflammatory response is poorly understood.

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Single-cell discovery of mA RNA modifications in the hippocampus.

Genome Res

July 2024

State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, China;

-Methyladenosine (mA) is a prevalent and highly regulated RNA modification essential for RNA metabolism and normal brain function. It is particularly important in the hippocampus, where mA is implicated in neurogenesis and learning. Although extensively studied, its presence in specific cell types remains poorly understood.

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Aims: To establish a system based on hyperspectral imaging and deep learning for the detection of cancer cells in metastatic lymph nodes.

Main Methods: The continuous sections of metastatic lymph nodes from 45 oral squamous cell carcinoma (OSCC) patients were collected. An improved ResUNet algorithm was established for deep learning to analyze the spectral curve differences between cancer cells and lymphocytes, and that between tumor tissue and normal tissue.

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SIRT7 knockdown promotes gemcitabine sensitivity of pancreatic cancer cell via upregulation of GLUT3 expression.

Cancer Lett

August 2024

Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Health Science Center, Beijing, 100191, China. Electronic address:

Gemcitabine serves as a first-line chemotherapeutic treatment for pancreatic cancer (PC), but it is prone to rapid drug resistance. Increasing the sensitivity of PC to gemcitabine has long been a focus of research. Fasting interventions may augment the effects of chemotherapy and present new options.

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Vitamin D deficiency (VDD) is associated with increased risk of type 2 diabetes mellitus (T2DM) and insulin resistance (IR). We aimed to investigate the association between the triglyceride-glucose (TyG) index that represents IR and VDD in elderly patients with T2DM. We enrolled 572 elderly participants with T2DM in this study.

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Study on the antidepressant activity of (2R,6R; 2S,6S)-Hydroxynorketamine (HNK) and its derivatives.

Clinics (Sao Paulo)

July 2024

Department of Neonatology, Shenzhen Children's Hospital, Shenzhen City, Guangdong Province, China; Health Management Center, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen University, Shenzhen City, Guangdong Province, China. Electronic address:

Objective: This study mainly explores (2R,6R; 2S,6S)-HNK and its compounds whether there are antidepressant effects.

Methods: Four HNK compounds were obtained from 2-(Chlorophenyl) Cyclopentylmethanone. Forced swimming test, locomotor sensitization test, and conditioned location preference test were used to screen the antidepressant activity of the synthesized target compounds.

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A Soldering Flux Tackles Complex Defects Chemistry in Sn-Pb Perovskite Solar Cells.

Adv Mater

August 2024

Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, School of Materials Science and Engineering, Peking University, Beijing, 100871, P. R. China.

Developing tin-lead (Sn-Pb) narrow-bandgap perovskites is crucial for the deployment of all-perovskite tandem solar cells, which can help to exceed the limits of single-junction photovoltaics. However, the Sn-Pb perovskite suffers from a large number of bulk traps and interfacial nonradiative recombination centers, with unsatisfactory open-circuit voltage and the consequent device efficiency. Herein, for the first time, it is shown that abietic acid (AA), a commonly used flux for metal soldering, effectively tackles complex defects chemistry in Sn-Pb perovskites.

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Tamarixetin, a natural dietary flavone, exhibits remarkable potential for the treatment of ischemic stroke. The present article aimed to explore the impact of tamarixetin on ischemic stroke and elucidate the underlying mechanisms. Effects of tamarixetin on ischemic stroke were evaluated in rats using the middle cerebral artery occlusion and reperfusion (MCAO/R) model, by assessing the neurological deficit scores, brain water content, brain infraction, and neuronal damage.

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The mA reader SlYTH2 negatively regulates tomato fruit aroma by impeding the translation process.

Proc Natl Acad Sci U S A

July 2024

Zhejiang Key Laboratory of Horticultural Crop Quality Improvement, College of Agriculture and Biotechnology, Zhejiang University, Zijingang Campus, Hangzhou 310058, China.

Article Synopsis
  • - The study focuses on -methyladenosine (mA), a crucial RNA modification for gene regulation, and its reader protein, SlYTH2, in tomatoes, particularly during fruit ripening.
  • - SlYTH2 binds to specific mRNAs associated with volatile synthesis, forming RNA-protein condensates that influence the levels of these volatiles.
  • - Knocking out SlYTH2 accelerates translation of aroma-related genes, leading to fruits with enhanced aroma that are preferred by consumers over wild-type fruits, highlighting a potential method for improving fruit appeal through mA manipulation.
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gene polymorphisms and risk of neuroblastoma in Chinese children from Jiangsu Province.

Cancer Innov

April 2024

Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou Women and Children's Medical Center Guangzhou Medical University Guangzhou Guangdong China.

Background: Neuroblastoma is one of the most common extracranial malignant solid tumors in children. AlkB homolog 5 (ALKBH5) is an RNA N6-methyladenosine (m6A) demethylase that plays a critical role in tumorigenesis and development. We assessed the association between single nucleotide polymorphisms (SNPs) in and the risk of neuroblastoma in a case-control study including 402 patients and 473 non-cancer controls.

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Sialic Acids Blockade-Based Chemo-Immunotherapy Featuring Cancer Cell Chemosensitivity and Antitumor Immune Response Synergies.

Adv Healthc Mater

November 2024

State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, and Chemical Biology Center, Peking University, Beijing, 100191, China.

Immune checkpoint blockade (ICB) has significantly improved the prognosis of patients with cancer, although the majority of such patients achieve low response rates; consequently, new therapeutic approaches are urgently needed. The upregulation of sialic acid-containing glycans is a common characteristic of cancer-related glycosylation, which drives disease progression and immune escape via numerous pathways. Herein, the development of self-assembled core-shell nanoscale coordination polymer nanoparticles loaded with a sialyltransferase inhibitor, referred to as NCP-STI which effectively stripped diverse sialoglycans from cancer cells, providing an antibody-independent pattern to disrupt the emerging Siglec-sialic acid glyco-immune checkpoint is reported.

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