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  1. Article ; Online: Responses of organ precursors to correct and incorrect inductive signals.

    Yang, Yun / Li, Shuang / Luo, Lingfei

    Trends in cell biology

    2023  

    Abstract: During embryonic development, the inductive molecules produced by local origins normally arrive at their target tissues in a nondirectional, diffusion manner. The target organ precursor cells must correctly interpret these inductive signals to ensure ... ...

    Abstract During embryonic development, the inductive molecules produced by local origins normally arrive at their target tissues in a nondirectional, diffusion manner. The target organ precursor cells must correctly interpret these inductive signals to ensure proper specification/differentiation, which is dependent on two prerequisites: (i) obtaining cell-intrinsic competence; and (ii) receiving correct inductive signals while resisting incorrect ones. Gain of intrinsic competence could avoid a large number of misinductions because the incompetent cells are nonresponsive to inductive signals. However, in cases of different precursor cells with similar competence and located in close proximity, resistance to incorrect inductive signals is essential for accurate determination of cell fate. Here we outline the mechanisms of how organ precursors respond to correct and incorrect inductive signals.
    Language English
    Publishing date 2023-09-20
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 30122-x
    ISSN 1879-3088 ; 0962-8924
    ISSN (online) 1879-3088
    ISSN 0962-8924
    DOI 10.1016/j.tcb.2023.08.008
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Polycystic kidney disease: novel insights into polycystin function.

    Luo, Lingfei / Roy, Sudipto / Li, Li / Ma, Ming

    Trends in molecular medicine

    2023  Volume 29, Issue 4, Page(s) 268–281

    Abstract: Autosomal dominant polycystic kidney disease (ADPKD) is a life-threatening monogenic disease caused by mutations in PKD1 and PKD2 that encode polycystin 1 (PC1) and polycystin 2 (PC2). PC1/2 localize to cilia of renal epithelial cells, and their function ...

    Abstract Autosomal dominant polycystic kidney disease (ADPKD) is a life-threatening monogenic disease caused by mutations in PKD1 and PKD2 that encode polycystin 1 (PC1) and polycystin 2 (PC2). PC1/2 localize to cilia of renal epithelial cells, and their function is believed to embody an inhibitory activity that suppresses the cilia-dependent cyst activation (CDCA) signal. Consequently, PC deficiency results in activation of CDCA and stimulates cyst growth. Recently, re-expression of PCs in established cysts has been shown to reverse PKD. Thus, the mode of action of PCs resembles a 'counterbalance in cruise control' to maintain lumen diameter within a designated range. Herein we review recent studies that point to novel arenas for future PC research with therapeutic potential for ADPKD.
    MeSH term(s) Humans ; Polycystic Kidney, Autosomal Dominant/genetics ; TRPP Cation Channels/genetics ; TRPP Cation Channels/metabolism ; Polycystic Kidney Diseases/genetics ; Polycystic Kidney Diseases/complications ; Signal Transduction ; Cysts/complications ; Kidney/metabolism
    Chemical Substances TRPP Cation Channels
    Language English
    Publishing date 2023-02-15
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 2036490-8
    ISSN 1471-499X ; 1471-4914
    ISSN (online) 1471-499X
    ISSN 1471-4914
    DOI 10.1016/j.molmed.2023.01.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Brain vascular damage-induced lymphatic ingrowth is directed by Cxcl12b/Cxcr4a.

    Chen, Jingying / He, Jianbo / Luo, Lingfei

    Development (Cambridge, England)

    2022  Volume 149, Issue 13

    Abstract: After ischemic stroke, promotion of vascular regeneration without causing uncontrolled vessel growth appears to be the major challenge for pro-angiogenic therapies. The molecular mechanisms underlying how nascent blood vessels (BVs) are correctly guided ... ...

    Abstract After ischemic stroke, promotion of vascular regeneration without causing uncontrolled vessel growth appears to be the major challenge for pro-angiogenic therapies. The molecular mechanisms underlying how nascent blood vessels (BVs) are correctly guided into the post-ischemic infarction area remain unknown. Here, using a zebrafish cerebrovascular injury model, we show that chemokine signaling provides crucial guidance cues to determine the growing direction of ingrown lymphatic vessels (iLVs) and, in turn, that of nascent BVs. The chemokine receptor Cxcr4a is transcriptionally activated in the iLVs after injury, whereas its ligand Cxcl12b is expressed in the residual central BVs, the destinations of iLV ingrowth. Mutant and mosaic studies indicate that Cxcl12b/Cxcr4a-mediated chemotaxis is necessary and sufficient to determine the growing direction of iLVs and nascent BVs. This study provides a molecular basis for how the vessel directionality of cerebrovascular regeneration is properly determined, suggesting potential application of Cxcl12b/Cxcr4a in the development of post-ischemic pro-angiogenic therapies.
    MeSH term(s) Animals ; Brain/metabolism ; Gene Expression Regulation, Developmental ; Lymphatic Vessels/metabolism ; Receptors, CXCR4/genetics ; Receptors, CXCR4/metabolism ; Zebrafish/genetics
    Chemical Substances Receptors, CXCR4
    Language English
    Publishing date 2022-06-30
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 90607-4
    ISSN 1477-9129 ; 0950-1991
    ISSN (online) 1477-9129
    ISSN 0950-1991
    DOI 10.1242/dev.200729
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Sulfamethoxazole induces brain capillaries toxicity in zebrafish by up-regulation of VEGF and chemokine signalling

    Yuhang Xu / Lingfei Luo / Jingying Chen

    Ecotoxicology and Environmental Safety, Vol 238, Iss , Pp 113620- (2022)

    2022  

    Abstract: Sulfamethoxazole (SMX) is a widespread broad-spectrum bacteriostatic antibiotic. Its residual is frequently detected in the water and may therefore bioaccumulate in the brain of aquatic organisms via blood circulation. Brain capillaries toxicity is very ... ...

    Abstract Sulfamethoxazole (SMX) is a widespread broad-spectrum bacteriostatic antibiotic. Its residual is frequently detected in the water and may therefore bioaccumulate in the brain of aquatic organisms via blood circulation. Brain capillaries toxicity is very important for brain development. However, little information is available in the literature to show the toxicity of SMX to brain development. To study the SMX’s brain toxic effects and the related mechanisms, we exposed zebrafish embryos to SMX at different concentrations (0 ppm, 1 ppm, 25 ppm, 100 ppm and 250 ppm) and found that high concentration (250 ppm) of SMX would not only caused an abnormal in malformation rate, hatching rate, body length and survival rate of zebrafish embryos, but also lead to brain oedema. In addition, SMX also induced cerebral ischaemia, aggravates oxidative stress, and changes genes related to oxidative stress (sod1, cat, gpx4, and nrf2). Furthermore, ischaemia caused by SMX could promote ectopic angiogenesis in brain via activating the angiogenesis-related genes (vegfab, cxcr4a, cxcl12b) from 24 h to 53 h. Inhibition of VEGF signalling by SU5416, or inhibition of chemokine downstream PI3K signalling by LY294002, could rescue the brain capillaries toxicity and brain oedema induced by SMX. Our results provide new evidence for the brain toxicity of SMX and its residual danger in the environment and aquatic organisms.
    Keywords Sulfamethoxazole ; Brain capillaries toxicity ; Brain oedema ; VEGF ; Chemokine ; Environmental pollution ; TD172-193.5 ; Environmental sciences ; GE1-350
    Subject code 616
    Language English
    Publishing date 2022-06-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Sulfamethoxazole induces brain capillaries toxicity in zebrafish by up-regulation of VEGF and chemokine signalling.

    Xu, Yuhang / Luo, Lingfei / Chen, Jingying

    Ecotoxicology and environmental safety

    2022  Volume 238, Page(s) 113620

    Abstract: Sulfamethoxazole (SMX) is a widespread broad-spectrum bacteriostatic antibiotic. Its residual is frequently detected in the water and may therefore bioaccumulate in the brain of aquatic organisms via blood circulation. Brain capillaries toxicity is very ... ...

    Abstract Sulfamethoxazole (SMX) is a widespread broad-spectrum bacteriostatic antibiotic. Its residual is frequently detected in the water and may therefore bioaccumulate in the brain of aquatic organisms via blood circulation. Brain capillaries toxicity is very important for brain development. However, little information is available in the literature to show the toxicity of SMX to brain development. To study the SMX's brain toxic effects and the related mechanisms, we exposed zebrafish embryos to SMX at different concentrations (0 ppm, 1 ppm, 25 ppm, 100 ppm and 250 ppm) and found that high concentration (250 ppm) of SMX would not only caused an abnormal in malformation rate, hatching rate, body length and survival rate of zebrafish embryos, but also lead to brain oedema. In addition, SMX also induced cerebral ischaemia, aggravates oxidative stress, and changes genes related to oxidative stress (sod1, cat, gpx4, and nrf2). Furthermore, ischaemia caused by SMX could promote ectopic angiogenesis in brain via activating the angiogenesis-related genes (vegfab, cxcr4a, cxcl12b) from 24 h to 53 h. Inhibition of VEGF signalling by SU5416, or inhibition of chemokine downstream PI3K signalling by LY294002, could rescue the brain capillaries toxicity and brain oedema induced by SMX. Our results provide new evidence for the brain toxicity of SMX and its residual danger in the environment and aquatic organisms.
    MeSH term(s) Animals ; Aquatic Organisms ; Brain ; Brain Edema/chemically induced ; Capillaries ; Sulfamethoxazole/toxicity ; Up-Regulation ; Vascular Endothelial Growth Factor A/genetics ; Water Pollutants, Chemical/toxicity ; Zebrafish
    Chemical Substances Vascular Endothelial Growth Factor A ; Water Pollutants, Chemical ; Sulfamethoxazole (JE42381TNV)
    Language English
    Publishing date 2022-05-10
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 436536-7
    ISSN 1090-2414 ; 0147-6513
    ISSN (online) 1090-2414
    ISSN 0147-6513
    DOI 10.1016/j.ecoenv.2022.113620
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: The Lysosomal Storage Disorder Due to

    Bao, Wandong / Wang, Xinjuan / Luo, Lingfei / Ni, Rui

    Zebrafish

    2021  Volume 18, Issue 3, Page(s) 175–183

    Abstract: The phospholipid phosphatase FIG4/Fig4 is a subunit of PIKFYVE/Pikfyve kinase complex that synthesizes phosphatidylinositol 3,5-bisphosphate (PI(3,5) ... ...

    Abstract The phospholipid phosphatase FIG4/Fig4 is a subunit of PIKFYVE/Pikfyve kinase complex that synthesizes phosphatidylinositol 3,5-bisphosphate (PI(3,5)P
    MeSH term(s) Animals ; Liver ; Lysosomes ; Mutation ; Phosphoric Monoester Hydrolases/genetics ; Zebrafish/genetics
    Chemical Substances Phosphoric Monoester Hydrolases (EC 3.1.3.2)
    Language English
    Publishing date 2021-04-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2156020-1
    ISSN 1557-8542 ; 1545-8547
    ISSN (online) 1557-8542
    ISSN 1545-8547
    DOI 10.1089/zeb.2020.1911
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Concentrations and influencing factors of 17 elements in placenta, cord blood, and maternal blood of women from an e-waste recycling area.

    Luo, Yacui / Zhang, Haijun / Gui, Fangzhong / Fang, Jiayang / Lin, Haijiang / Qiu, Danhong / Ge, Lingfei / Wang, Qiong / Xu, Peiwei / Tang, Jun

    Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS)

    2024  Volume 84, Page(s) 127449

    Abstract: Background: The effects of prenatal element exposure on mothers and fetuses have generated concern. Profiles of trace and toxic elements in biological material are urgently desired, especially for women who reside near e-waste recycling facilities. The ... ...

    Abstract Background: The effects of prenatal element exposure on mothers and fetuses have generated concern. Profiles of trace and toxic elements in biological material are urgently desired, especially for women who reside near e-waste recycling facilities. The aim of this study was to investigate elements concentrations in placenta, cord blood, and maternal blood of women and to evaluate the influencing factors.
    Methods: A group of 48 women from an e-waste recycling site and a group of 31 women from a non-e-waste recycling site were recruited. Basic characteristics were collected by questionnaire and the concentrations of 17 elements in placenta, cord blood, and maternal blood samples were analyzed by inductively coupled plasma mass spectrometry (ICP-MS). Finally, the generalized linear model regression analysis (GLM) was used to test the association between element concentrations and possible factors.
    Results: Compared to the control group, the exposed group had significantly elevated cadmium (Cd), zinc (Zn), nickel (Ni), and antimony (Sb) in placenta, and higher lead (Pb) in maternal blood and cord blood (P<0.05). Sb concentration in maternal blood was significantly lower than in the control group (P<0.05). GLM analysis showed that element concentrations were mainly associated with maternal age [chromium (Cr), iron (Fe), selenium (Se), cobalt (Co), mercury (Hg) in placenta, copper (Cu) in maternal blood], education (Se, Sb in placenta), family income (Cu in maternal blood and Ni in placenta), passive smoking [Cu and Zn in placenta, Pb in maternal blood], and e-waste contact history (Hg in cord blood, Cu, Zn, and Cd in maternal blood).
    Conclusions: Women in the e-waste recycling area had higher toxic element levels in the placenta and blood samples. More preventive measures were needed to reduce the risk of element exposure for mothers and fetuses in these areas.
    Language English
    Publishing date 2024-04-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1236267-0
    ISSN 1878-3252 ; 1611-602X ; 0946-672X
    ISSN (online) 1878-3252 ; 1611-602X
    ISSN 0946-672X
    DOI 10.1016/j.jtemb.2024.127449
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Non-destructive measurements for the evaluation of beef freshness based on airflow interaction and a structured light 3D imaging technique and comparison with pH value and total volatile basic nitrogen content

    Luo, Xiuzhi / Sun, Qinming / Zhou, Lingfei / He, Ke / Gao, Xin / Tang, Xiuying

    IAgrE Biosystems Engineering. 2023 Feb., v. 226 p.182-193

    2023  

    Abstract: This study aimed to investigate the potential ability to predict total volatile basic nitrogen (TVB-N) content and pH value for the freshness evaluation of beef by examining instantaneous elastoplastic deformation of the meat caused by airflow using a ... ...

    Abstract This study aimed to investigate the potential ability to predict total volatile basic nitrogen (TVB-N) content and pH value for the freshness evaluation of beef by examining instantaneous elastoplastic deformation of the meat caused by airflow using a structured light 3D imaging technique. A constant airflow impacted the beef surface whilst a 3D camera continuously captured point cloud images of the concave area. The volume, surface area, and depth of spatial deformation, as well as the projected area of three planes, were obtained using the K-nearest neighbour algorithm, down-sampling processing, the oriented bounding box algorithm, and the Alpha Shape algorithm. The instantaneous recovery and residual of each quantified deformation feature were obtained at the moment of air unloading to get the instantaneous elastic–plastic deformation and degree of instantaneous elastic–plastic deformation of beef's spatial deformation feature. A correlation analysis of the obtained features and two freshness indicators (pH value and TVB-N content) was carried out for feature selection and modelling. The results showed that the models using the degree of instantaneous elastic deformation of spatial deformation features of beef with feature selection produced the best prediction results in this study. For beef pH values and TVB-N content evaluation, the correlation coefficient in the prediction set were 0.745 and 0.844, respectively.
    Keywords air ; air flow ; algorithms ; beef ; cameras ; data collection ; elastic deformation ; freshness ; nitrogen content ; pH ; prediction ; surface area ; total volatile basic nitrogen ; TVB-N and pH ; Airflow ; Spatial deformation ; Structured light 3D imaging ; Instantaneous elastoplasticity
    Language English
    Dates of publication 2023-02
    Size p. 182-193.
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ZDB-ID 2075942-3
    ISSN 1537-5110
    ISSN 1537-5110
    DOI 10.1016/j.biosystemseng.2023.01.006
    Database NAL-Catalogue (AGRICOLA)

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  9. Article ; Online: Pax4-Ghrelin mediates the conversion of pancreatic ε-cells to β-cells after extreme β-cell loss in zebrafish.

    Yu, Junqin / Ma, Jianlong / Li, Yanfeng / Zhou, Yang / Luo, Lingfei / Yang, Yun

    Development (Cambridge, England)

    2023  Volume 150, Issue 6

    Abstract: Pancreatic ε-cells producing ghrelin are one type of endocrine cell found in islets, which have been shown to influence other intra-islet cells, especially in regulating the function of β cells. However, the role of such cells during β-cell regeneration ... ...

    Abstract Pancreatic ε-cells producing ghrelin are one type of endocrine cell found in islets, which have been shown to influence other intra-islet cells, especially in regulating the function of β cells. However, the role of such cells during β-cell regeneration is currently unknown. Here, using a zebrafish nitroreductase (NTR)-mediated β-cell ablation model, we reveal that ghrelin-positive ε-cells in the pancreas act as contributors to neogenic β-cells after extreme β-cell loss. Further studies show that the overexpression of ghrelin or the expansion of ε-cells potentiates β-cell regeneration. Lineage tracing confirms that a proportion of embryonic ε-cells can transdifferentiate to β-cells, and that the deletion of Pax4 enhances this transdifferentiation of ε-cells to β-cells. Mechanistically, Pax4 binds to the ghrelin regulatory region and represses its transcription. Thus, deletion of Pax4 derepresses ghrelin expression and causes producing more ghrelin-positive cells, enhancing the transdifferentiation of ε-cells to β-cells and consequently potentiating β-cell regeneration. Our findings reveal a previously unreported role for ε-cells during zebrafish β-cell regeneration, indicating that Pax4 regulates ghrelin transcription and mediates the conversion of embryonic ε-cells to β-cells after extreme β-cell loss.
    MeSH term(s) Animals ; Ghrelin/metabolism ; Homeodomain Proteins/metabolism ; Pancreas ; Transcription Factors/metabolism ; Zebrafish/genetics ; Zebrafish/metabolism
    Chemical Substances Ghrelin ; Homeodomain Proteins ; Transcription Factors ; pax4 protein, zebrafish
    Language English
    Publishing date 2023-03-27
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 90607-4
    ISSN 1477-9129 ; 0950-1991
    ISSN (online) 1477-9129
    ISSN 0950-1991
    DOI 10.1242/dev.201306
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: VEGF signaling governs the initiation of biliary-mediated liver regeneration through the PI3K-mTORC1 axis.

    Cai, Pengcheng / Ni, Rui / Lv, Mengzhu / Liu, Huijuan / Zhao, Jieqiong / He, Jianbo / Luo, Lingfei

    Cell reports

    2023  Volume 42, Issue 9, Page(s) 113028

    Abstract: Biliary epithelial cells (BECs) are a potential source to repair the damaged liver when hepatocyte proliferation is compromised. Promotion of BEC-to-hepatocyte transdifferentiation could be beneficial to the clinical therapeutics of patients with end- ... ...

    Abstract Biliary epithelial cells (BECs) are a potential source to repair the damaged liver when hepatocyte proliferation is compromised. Promotion of BEC-to-hepatocyte transdifferentiation could be beneficial to the clinical therapeutics of patients with end-stage liver diseases. However, mechanisms underlying the initiation of BEC transdifferentiation remain largely unknown. Here, we show that upon extreme hepatocyte injury, vegfaa and vegfr2/kdrl are notably induced in hepatic stellate cells and BECs, respectively. Pharmacological and genetic inactivation of vascular endothelial growth factor (VEGF) signaling would disrupt BEC dedifferentiation and proliferation, thus restraining hepatocyte regeneration. Mechanically, VEGF signaling regulates the activation of the PI3K-mammalian target of rapamycin complex 1 (mTORC1) axis, which is essential for BEC-to-hepatocyte transdifferentiation. In mice, VEGF signaling exerts conserved roles in oval cell activation and BEC-to-hepatocyte differentiation. Taken together, this study shows VEGF signaling as an initiator of biliary-mediated liver regeneration through activating the PI3K-mTORC1 axis. Modulation of VEGF signaling in BECs could be a therapeutic approach for patients with end-stage liver diseases.
    MeSH term(s) Humans ; Animals ; Mice ; Vascular Endothelial Growth Factor A ; Phosphatidylinositol 3-Kinases ; Liver Regeneration/physiology ; Hepatocytes ; Cell Proliferation ; Liver Diseases ; Mechanistic Target of Rapamycin Complex 1 ; Liver ; Mammals
    Chemical Substances Vascular Endothelial Growth Factor A ; Phosphatidylinositol 3-Kinases (EC 2.7.1.-) ; Mechanistic Target of Rapamycin Complex 1 (EC 2.7.11.1)
    Language English
    Publishing date 2023-08-24
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2649101-1
    ISSN 2211-1247 ; 2211-1247
    ISSN (online) 2211-1247
    ISSN 2211-1247
    DOI 10.1016/j.celrep.2023.113028
    Database MEDical Literature Analysis and Retrieval System OnLINE

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