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  1. Article: Parathyroid Hormone-Related Protein Promotes the Proliferation of Patient-Derived Glioblastoma Stem Cells via Activating cAMP/PKA Signaling Pathway.

    Guo, Zhenyu / Huang, Tingqin / Liu, Yingfei / Liu, Chongxiao

    International journal of stem cells

    2023  Volume 16, Issue 3, Page(s) 315–325

    Abstract: Background and objectives: Glioblastoma (GBM) is an aggressive primary brain tumor characterized by its heterogeneity and high recurrence and lethality rates. Glioblastoma stem cells (GSCs) play a crucial role in therapy resistance and tumor recurrence. ...

    Abstract Background and objectives: Glioblastoma (GBM) is an aggressive primary brain tumor characterized by its heterogeneity and high recurrence and lethality rates. Glioblastoma stem cells (GSCs) play a crucial role in therapy resistance and tumor recurrence. Therefore, targeting GSCs is a key objective in developing effective treatments for GBM. The role of Parathyroid hormone-related peptide (PTHrP) in GBM and its impact on GSCs remains unclear. This study aimed to investigate the effect of PTHrP on GSCs and its potential as a therapeutic target for GBM.
    Methods and results: Using the Cancer Genome Atlas (TCGA) database, we found higher expression of PTHrP in GBM, which correlated inversely with survival. GSCs were established from three human GBM samples obtained after surgical resection. Exposure to recombinant human PTHrP protein (rPTHrP) at different concentrations significantly enhanced GSCs viability. Knockdown of PTHrP using target-specific siRNA (siPTHrP) inhibited tumorsphere formation and reduced the number of BrdU-positive cells. In an orthotopic xenograft mouse model, suppression of PTHrP expression led to significant inhibition of tumor growth. The addition of rPTHrP in the growth medium counteracted the antiproliferative effect of siPTHrP. Further investigation revealed that PTHrP increased cAMP concentration and activated the PKA signaling pathway. Treatment with forskolin, an adenylyl cyclase activator, nullified the antiproliferative effect of siPTHrP.
    Conclusions: Our findings demonstrate that PTHrP promotes the proliferation of patient-derived GSCs by activating the cAMP/PKA signaling pathway. These results uncover a novel role for PTHrP and suggest its potential as a therapeutic target for GBM treatment.
    Language English
    Publishing date 2023-06-30
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2914134-5
    ISSN 2005-5447 ; 2005-3606
    ISSN (online) 2005-5447
    ISSN 2005-3606
    DOI 10.15283/ijsc22097
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Efficient generation of functional neurons from mouse embryonic stem cells via neurogenin-2 expression.

    Liu, Yingfei / Wang, Jinzhao / Südhof, Thomas C / Wernig, Marius

    Nature protocols

    2023  Volume 18, Issue 10, Page(s) 2954–2974

    Abstract: The production of induced neuronal (iN) cells from human embryonic stem cells (ESCs) and induced pluripotent stem cells by the forced expression of proneural transcription factors is rapid, efficient and reproducible. The ability to generate large ... ...

    Abstract The production of induced neuronal (iN) cells from human embryonic stem cells (ESCs) and induced pluripotent stem cells by the forced expression of proneural transcription factors is rapid, efficient and reproducible. The ability to generate large numbers of human neurons in such a robust manner enables large-scale studies of human neural differentiation and neuropsychiatric diseases. Surprisingly, similar transcription factor-based approaches for converting mouse ESCs into iN cells have been challenging, primarily because of low cell survival. Here, we provide a detailed approach for the efficient and reproducible generation of functional iN cells from mouse ESC cultures by the genetically induced expression of neurogenin-2. The resulting iN cells display mature pre- and postsynaptic specializations and form synaptic networks. Our method provides the basis for studying neuronal development and enables the direct comparison of cellular phenotypes in mouse and human neurons generated in an equivalent way. The procedure requires 14 d and can be carried out by users with expertise in stem cell culture.
    Language English
    Publishing date 2023-08-18
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2244966-8
    ISSN 1750-2799 ; 1754-2189
    ISSN (online) 1750-2799
    ISSN 1754-2189
    DOI 10.1038/s41596-023-00863-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Humidified versus nonhumidified low-flow oxygen therapy in children with Pierre-Robin syndrome: A randomized controlled trial.

    Zhang, Xin / Fan, Aijuan / Liu, Yingfei / Wei, Li

    Medicine

    2022  Volume 101, Issue 38, Page(s) e30329

    Abstract: Background: Humidification is an important process in clinical oxygen therapy. We aimed to evaluate the effects and safety of humidified versus nonhumidified low-flow oxygen therapy in children with Pierre-Robin syndrome.: Methods: This study was an ... ...

    Abstract Background: Humidification is an important process in clinical oxygen therapy. We aimed to evaluate the effects and safety of humidified versus nonhumidified low-flow oxygen therapy in children with Pierre-Robin syndrome.
    Methods: This study was an open-label, single-centered randomized controlled trial (RCT) with a parallel group design. The study protocol has been registered in Chinese Clinical Trial Registry (ChiCTR1900021584). The children were randomized to the humidified versus nonhumidified groups. Average arterial oxygen partial pressure (PaO2) and carbon dioxide partial pressure (PaCO2), incidence of ventilator-associated pneumonia (VAP), nasal cavity dryness, nasal mucosal bleeding and bacterial contamination of the humidified bottle, the cost of nasal oxygen therapy and duration of intensive care unit (ICU) stay were analyzed.
    Results: A total of 213 children with Pierre-Robin syndrome were included. There were no significant differences in the gender, age, weight, prematurity, duration of anesthesia and surgery duration of mandibular traction between humidified group and nonhumidified group (all P > .05). No significant differences in the average arterial PaO2 and PaCO2 level on the postoperative day 1, 2, and ICU discharge between humidified group and nonhumidified group were found (all P > .05). There were no significant differences in the incidence of nasal cavity dryness, nasal mucosal bleeding, bacterial contamination and VAP, the duration of ICU stay between humidified group and nonhumidified group (all P > .05). The cost of nasal oxygen therapy in the humidified group was significantly less than that of nonhumidified group (P = .013).
    Conclusions: Humidifying the oxygen with cold sterile water in the low-flow oxygen therapy in children may be not necessary. Future RCTs with lager sample size and rigorous design are warranted to further elucidate the effects and safety of humidified versus nonhumidified low-flow oxygen therapy.
    MeSH term(s) Carbon Dioxide ; Child ; Humans ; Oxygen ; Oxygen Inhalation Therapy/methods ; Pierre Robin Syndrome ; Water
    Chemical Substances Water (059QF0KO0R) ; Carbon Dioxide (142M471B3J) ; Oxygen (S88TT14065)
    Language English
    Publishing date 2022-10-05
    Publishing country United States
    Document type Journal Article ; Randomized Controlled Trial
    ZDB-ID 80184-7
    ISSN 1536-5964 ; 0025-7974
    ISSN (online) 1536-5964
    ISSN 0025-7974
    DOI 10.1097/MD.0000000000030329
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: A novel technique for ship wake detection from optical images

    Liu, Yingfei / Zhao, Jun / Qin, Yan

    Remote sensing of environment. 2021 June 01, v. 258

    2021  

    Abstract: Monitoring ships at sea is of great importance for both civilian and military purposes. Since ship wakes are more distinct than hulls, wakes are widely employed for ship detection from satellite imagery. In this paper, a novel approach was proposed to ... ...

    Abstract Monitoring ships at sea is of great importance for both civilian and military purposes. Since ship wakes are more distinct than hulls, wakes are widely employed for ship detection from satellite imagery. In this paper, a novel approach was proposed to detect ships from optical imagery. Candidate wakes were first obtained by the normalized Radon transform of an image with the ship hull in the center. False wakes were then removed by pixel value verification, turbulent wake identification, included angle verification, and contrast verification. Meanwhile, bright edges of turbulent wakes were detected after turbulent wake identification. Detected wakes were verified with wakes delineated through visual inspection. By implementing the proposed technique to optical imagery, reflectance at the near-infrared (NIR) band of GF 1 and Sentinel 2 MSI and the panchromatic band of Landsat 8 OLI showed the best accuracies. Total recalls of turbulent and Kelvin wakes were 93.5% and 91.2%, respectively, while total precisions were 93.7% and 93.8%, respectively. Positions, directions, and endpoints of wakes were also obtained with good accuracy. The categories of wakes were confirmed by the wake features and the spatial relationships between wakes. Factors influencing the accuracy of the developed method and comparison with state-of-the-art wake detection methods were then discussed.
    Keywords Landsat ; environment ; reflectance ; remote sensing
    Language English
    Dates of publication 2021-0601
    Publishing place Elsevier Inc.
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 431483-9
    ISSN 0034-4257
    ISSN 0034-4257
    DOI 10.1016/j.rse.2021.112375
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Buyang Huanwu decoction promotes angiogenesis after cerebral ischemia through modulating caveolin-1-mediated exosome MALAT1/YAP1/HIF-1α axis.

    Chen, Bowei / Xu, Yaqian / Tian, Fengming / Liu, Yingfei / Yi, Jian / Ouyang, Yin / Zeng, Fanzuo / Peng, Yanmei / Liu, Baiyan

    Phytomedicine : international journal of phytotherapy and phytopharmacology

    2024  Volume 129, Page(s) 155609

    Abstract: Background: Angiogenesis is an effective method for promoting neurological function recovery after cerebral ischemia (CI). Buyang Huanwu decoction (BHD) is a traditional Chinese medicinal recipe that is frequently employed for CI treatment. Previous ... ...

    Abstract Background: Angiogenesis is an effective method for promoting neurological function recovery after cerebral ischemia (CI). Buyang Huanwu decoction (BHD) is a traditional Chinese medicinal recipe that is frequently employed for CI treatment. Previous investigations have validated that it promotes angiogenesis following CI. Nevertheless, the precise mechanism by which it does this has yet to be completely understood.
    Objective: This study aims to examine the underlying mechanism through which BHD facilitates angiogenesis following CI by regulating the exosomal MALAT1/YAP1/HIF-1α signaling axis, specifically via the involvement of caveolin-1 (Cav1), an endocytosis-associated protein.
    Methods: A CI model was created using middle cerebral artery occlusion (MCAO). Following the administration of multiple doses of BHD, various parameters, including the neurobehavioral score, pathological damage, and angiogenesis, were assessed in each group of mice to identify the optimal dosage of BHD for treating CI. The molecular processes underlying the angiogenic implications of BHD following CI were investigated exhaustively by employing single-cell sequencing. Finally, the involvement of Cav1 was confirmed in Cav1 knockout mice and Cav1-silenced stably transfected strains to validate the mechanism by which BHD increases angiogenesis following CI.
    Results: BHD could promote angiogenesis after CI. Single-cell sequencing results suggested that its potential mechanism of action might be connected with Cav1 and the exosomal MALAT1/YAP1/HIF-1α signaling axis. BHD could promote angiogenesis after CI by regulating the exosomal MALAT1/YAP1/HIF-1α axis through Cav1, as validated in vivo and in vitro experiments. Accordingly, Cav1 may be a key target of BHD in promoting angiogenesis after CI.
    Conclusion: This investigation represents the initial attempt to comprehensively ascertain the underlying mechanism of action of BHD in treating CI using single-cell sequencing, gene-knockout mice, and stable transfected cell lines, potentially associated with the modulation of the exosomal MALAT1/YAP1/HIF-1α axis by Cav1. Our findings offer novel empirical evidence for unraveling the regulatory pathways through which Cav1 participates in angiogenesis following CI and shed light on the potential mechanisms of BHD.
    Language English
    Publishing date 2024-04-08
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1205240-1
    ISSN 1618-095X ; 0944-7113
    ISSN (online) 1618-095X
    ISSN 0944-7113
    DOI 10.1016/j.phymed.2024.155609
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Periostin attenuates oxygen and glucose deprivation-induced death of mouse neural stem cells via inhibition of p38 MAPK activation.

    Liu, Yingfei / Luan, Yan / Guo, Zhenyu / Liu, Yong / Liu, Chongxiao

    Neuroscience letters

    2022  Volume 774, Page(s) 136526

    Abstract: Promoting neural stem cells (NSCs) survival in the harsh niche is essential to cell replacement therapy for various central nervous system diseases. As an integral component of the extracellular matrix, Periostin (POSTN) has been shown to protect various ...

    Abstract Promoting neural stem cells (NSCs) survival in the harsh niche is essential to cell replacement therapy for various central nervous system diseases. As an integral component of the extracellular matrix, Periostin (POSTN) has been shown to protect various cell types from hypoxia-ischemia damage. This study aimed to investigate the neuroprotective effects of POSTN on NSCs injury induced by oxygen and glucose deprivation (OGD). Under challenge with OGD, cell viability significantly decreased in cultured mouse NSCs, and supplement POSTN rescued cell viability in a concentration-dependent manner, as shown by CCK-8. TUNEL and propidium iodide/Hoechst staining showed that POSTN pretreatment protected NSCs against OGD-induced apoptosis. Western blot assay demonstrated that POSTN pretreatment inhibited cleavage of caspase-3 and restored the balance of Bcl-2/Bax. And pretreatment with cilengitide (an inhibitor of POSTN receptors) abolished the protective effect of POSTN. Further investigation demonstrated that supplement POSTN inhibited phosphorylation of p38 in a concentration-dependent manner. Moreover, the neuroprotective effect of POSTN was hampered by anisomycin, an activator of p38. We conclude that POSTN pretreatment in cultured mouse NSCs mitigated OGD-induced cell death, and inhibition of the p38 MAPK pathway might be one of the underlying mechanisms. Our findings may provide a novel strategy for enhancing both endogenous and exogenous NSCs survival after ischemia and hypoxia injury.
    MeSH term(s) Animals ; Apoptosis ; Cell Survival ; Glucose/metabolism ; Hypoxia/metabolism ; Mice ; Neural Stem Cells ; Neuroprotective Agents/metabolism ; Neuroprotective Agents/pharmacology ; Oxygen/metabolism ; p38 Mitogen-Activated Protein Kinases/metabolism
    Chemical Substances Neuroprotective Agents ; p38 Mitogen-Activated Protein Kinases (EC 2.7.11.24) ; Glucose (IY9XDZ35W2) ; Oxygen (S88TT14065)
    Language English
    Publishing date 2022-02-11
    Publishing country Ireland
    Document type Journal Article
    ZDB-ID 194929-9
    ISSN 1872-7972 ; 0304-3940
    ISSN (online) 1872-7972
    ISSN 0304-3940
    DOI 10.1016/j.neulet.2022.136526
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Placement of peripherally inserted central catheter through upper versus lower limb vein in neonates: A meta-analysis of randomized controlled trials.

    Zhao, Xuetang / Liu, Yingfei / Li, Xiaoyan / Wei, Li / Bian, Lanzheng / Peng, Mingqi

    Journal for specialists in pediatric nursing : JSPN

    2023  Volume 29, Issue 1, Page(s) e12417

    Abstract: Aim: Peripherally inserted central catheter (PICC) is an important treatment for the drug and nutrition administration in neonates. We aimed to evaluate the effects and safety of PICC placement through upper versus lower limb vein in neonates, to ... ...

    Abstract Aim: Peripherally inserted central catheter (PICC) is an important treatment for the drug and nutrition administration in neonates. We aimed to evaluate the effects and safety of PICC placement through upper versus lower limb vein in neonates, to provide insights into the clinical PICC nursing care.
    Design: A meta-analysis.
    Methods: We searched the Cochrane Library, Web of Science, PubMed, Science Direct, China national knowledge infrastructure, Wanfang Data Knowledge Service Platform, China Weipu Database, China Biomedical Literature Database for published randomized controlled trials (RCTs) on the placement of PICC via upper limb and lower limb venipuncture. Two reviewers independently evaluated and cross-checked the quality of the included studies in accordance with the quality standards of the Cochrane Manual. We used RevMan 5.3 software for statistical processing.
    Results: A total of 12 RCTs were included in this meta-analysis. Meta-analysis indicated that compared with upper limb veins, PICC insertion through lower limb veins is beneficial to increase the one-time puncture success rate (relative risk [RR]  =  0.73, 95% confidence interval [CI]: 0.68-0.79) and the indwelling time (mean difference [MD] =  -3.60, 95% CI: -5.35 to -1.86), reduce the operation time (MD =  10.37, 95% CI: 7.48-13.26), estimated bleeding volume (MD =  0.55, 95% CI: 0.34-0.75), incidence of catheter ectopia (RR  =  2.46, 95% CI: 1.81-3.35), PICC-associated infection (RR  =  2.82, 95% CI: 1.65-4.83), exosmosis (RR  =  2.45, 95% CI: 1.49-4.04, p < .001) and phlebitis (RR  =  1.40, 95% CI: 1.03-1.90). No significant difference in the Incidence of catheter obstruction between the upper and lower limb veins (RR  =  1.20, 95% CI: 0.73-1.97, p = .48) was found.
    Public contribution: There are certain advantages in neonatal PICC puncture through the lower limb vein. The lower limb vein may be the preferred choice for neonatal PICC puncture.
    MeSH term(s) Infant, Newborn ; Humans ; Catheterization, Central Venous ; Randomized Controlled Trials as Topic ; Lower Extremity ; Catheterization, Peripheral/adverse effects ; Catheters
    Language English
    Publishing date 2023-11-21
    Publishing country United States
    Document type Meta-Analysis ; Journal Article
    ZDB-ID 2082595-X
    ISSN 1744-6155 ; 1539-0136 ; 1088-145X
    ISSN (online) 1744-6155
    ISSN 1539-0136 ; 1088-145X
    DOI 10.1111/jspn.12417
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: How Sports Event Volunteer Management Affects Volunteers’ Satisfaction and Engagement

    Wang Zhigang / Liu Yingfei / Zhang Jinyao / Liu Xintao / Duan Hongyan / Zhang Lei

    SAGE Open, Vol

    The Mediating Role of Social Capital

    2022  Volume 12

    Abstract: This study investigated the role of social capital in the relationship between sports event volunteer management and volunteers’ attitude and behavior. Social capital was discovered to mediate the relationships of sports event volunteer management with ... ...

    Abstract This study investigated the role of social capital in the relationship between sports event volunteer management and volunteers’ attitude and behavior. Social capital was discovered to mediate the relationships of sports event volunteer management with volunteers’ satisfaction and work engagement. These relationships were empirically examined by conducting a survey of 303 volunteers from the 2016 Wuhan Open and 2016 Wuhan Marathon. The results revealed that sports event management practices, namely training and working conditions, significantly affected the volunteers’ social capital. The social capital of the sports event volunteers significantly affected their satisfaction and work engagement. The volunteers’ social capital promoted their satisfaction and engagement only if sports event volunteer management practices effectively enhanced their social capital. This study provides recommendations to help sports event organizers motivate volunteers.
    Keywords History of scholarship and learning. The humanities ; AZ20-999 ; Social Sciences ; H
    Subject code 796 ; 300
    Language English
    Publishing date 2022-06-01T00:00:00Z
    Publisher SAGE Publishing
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Book ; Online: Exploring Object-Centric Temporal Modeling for Efficient Multi-View 3D Object Detection

    Wang, Shihao / Liu, Yingfei / Wang, Tiancai / Li, Ying / Zhang, Xiangyu

    2023  

    Abstract: In this paper, we propose a long-sequence modeling framework, named StreamPETR, for multi-view 3D object detection. Built upon the sparse query design in the PETR series, we systematically develop an object-centric temporal mechanism. The model is ... ...

    Abstract In this paper, we propose a long-sequence modeling framework, named StreamPETR, for multi-view 3D object detection. Built upon the sparse query design in the PETR series, we systematically develop an object-centric temporal mechanism. The model is performed in an online manner and the long-term historical information is propagated through object queries frame by frame. Besides, we introduce a motion-aware layer normalization to model the movement of the objects. StreamPETR achieves significant performance improvements only with negligible computation cost, compared to the single-frame baseline. On the standard nuScenes benchmark, it is the first online multi-view method that achieves comparable performance (67.6% NDS & 65.3% AMOTA) with lidar-based methods. The lightweight version realizes 45.0% mAP and 31.7 FPS, outperforming the state-of-the-art method (SOLOFusion) by 2.3% mAP and 1.8x faster FPS. Code has been available at https://github.com/exiawsh/StreamPETR.git.
    Keywords Computer Science - Computer Vision and Pattern Recognition
    Subject code 004
    Publishing date 2023-03-21
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Book ; Online: PETR

    Liu, Yingfei / Wang, Tiancai / Zhang, Xiangyu / Sun, Jian

    Position Embedding Transformation for Multi-View 3D Object Detection

    2022  

    Abstract: In this paper, we develop position embedding transformation (PETR) for multi-view 3D object detection. PETR encodes the position information of 3D coordinates into image features, producing the 3D position-aware features. Object query can perceive the 3D ...

    Abstract In this paper, we develop position embedding transformation (PETR) for multi-view 3D object detection. PETR encodes the position information of 3D coordinates into image features, producing the 3D position-aware features. Object query can perceive the 3D position-aware features and perform end-to-end object detection. PETR achieves state-of-the-art performance (50.4% NDS and 44.1% mAP) on standard nuScenes dataset and ranks 1st place on the benchmark. It can serve as a simple yet strong baseline for future research. Code is available at \url{https://github.com/megvii-research/PETR}.

    Comment: Accepted by ECCV 2022. Code is available at \url{https://github.com/megvii-research/PETR}
    Keywords Computer Science - Computer Vision and Pattern Recognition
    Publishing date 2022-03-10
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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