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Yao X, Zhao Z, Zhang W, Liu R, Ni T, Cui B, Lei Y, Du J, Ai D, Jiang H, Lv H, Li X. Specialized Retinal Endothelial Cells Modulate Blood-Retina Barrier in Diabetic Retinopathy. Diabetes 2024; 73:225-236. [PMID: 37976214 DOI: 10.2337/db23-0368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 11/06/2023] [Indexed: 11/19/2023]
Abstract
Endothelial cells (EC) play essential roles in retinal vascular homeostasis. This study aimed to characterize retinal EC heterogeneity and functional diversity using single-cell RNA sequencing. Systematic analysis of cellular compositions and cell-cell interaction networks identified a unique EC cluster with high inflammatory gene expression in diabetic retina; sphingolipid metabolism is a prominent aspect correlated with changes in retinal function. Among sphingolipid-related genes, alkaline ceramidase 2 (ACER2) showed the most significant increase. Plasma samples of patients with nonproliferative diabetic retinopathy (NPDR) with diabetic macular edema (DME) or without DME (NDME) and active proliferative DR (PDR) were collected for mass spectrometry analysis. Metabolomic profiling revealed that the ceramide levels were significantly elevated in NPDR-NDME/DME and further increased in active PDR compared with control patients. In vitro analyses showed that ACER2 overexpression retarded endothelial barrier breakdown induced by ceramide, while silencing of ACER2 further disrupted the injury. Moreover, intravitreal injection of the recombinant ACER2 adeno-associated virus rescued diabetes-induced vessel leakiness, inflammatory response, and neurovascular disease in diabetic mouse models. Together, this study revealed a new diabetes-specific retinal EC population and a negative feedback regulation pathway that reduces ceramide content and endothelial dysfunction by upregulating ACER2 expression. These findings provide insights into cell-type targeted interventions for diabetic retinopathy. ARTICLE HIGHLIGHTS
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Affiliation(s)
- Xuyang Yao
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Centre for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin Medical University, Tianjin, China
| | - Ziyan Zhao
- Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, China
| | - Wenhui Zhang
- Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, China
| | - Ruixin Liu
- Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, China
| | - Tianwen Ni
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Centre for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin Medical University, Tianjin, China
| | - Bohao Cui
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China
| | - Yi Lei
- Department of Ophthalmology, Tianjin Medical University General Hospital, Tianjin, China
| | - Jie Du
- Experimental Research Center, Beijing Institute of Heart Lung and Blood Vessel Disease, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Ding Ai
- Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, China
| | - Hongfeng Jiang
- Experimental Research Center, Beijing Institute of Heart Lung and Blood Vessel Disease, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Huizhen Lv
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Centre for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin Medical University, Tianjin, China
- Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, China
| | - Xiaorong Li
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Centre for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin Medical University, Tianjin, China
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Su L, Gong X, Fan R, Ni T, Yang F, Zhang X, Li X. Mechanism of action of platinum nanoparticles implying from antioxidant to metabolic programming in light-induced retinal degeneration model. Redox Biol 2023; 65:102836. [PMID: 37541055 PMCID: PMC10412868 DOI: 10.1016/j.redox.2023.102836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 07/24/2023] [Accepted: 07/31/2023] [Indexed: 08/06/2023] Open
Abstract
Photoreceptors (PRs) degeneration is central to visual impairment and loss in most blind retinal diseases, including age-related macular disease (AMD) and diabetic retinopathy (DR). PRs are susceptible to oxidative stress owing to their unique metabolic features. Accumulating evidence has demonstrated that the targeting oxidative stress is a promising treatment strategy for PR degeneration. Herein, we introduced potent antioxidative platinum nanoparticles (Pt NPs) to treat PRs degeneration in this study. The Pt NPs exhibited multi-enzymatic antioxidant activity and protected PRs from H2O2-induced oxidative damage in vitro assays. Based on the same mechanism, the intravitreal injection of Pt NPs significantly reduced cell apoptosis, maintained retinal structure and preserved retinal function in a mouse model of light-induced retinal degeneration (LIRD). Most importantly, the results of RNA sequencing showed that the transcription of antioxidative genes was upregulated, and metabolic reprogramming occurred in the LIRD-retina after treatment with Pt NPs, both of which benefited retinal survival from oxidative damage. The results indicated that Pt NPs were indeed potent therapeutic candidates for PRs degeneration in blind retinal diseases.
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Affiliation(s)
- Lin Su
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China
| | - Xiaoqun Gong
- School of Life Sciences, Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, PR China.
| | - Ruiyan Fan
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China
| | - Tianwen Ni
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China
| | - Fuhua Yang
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China
| | - Xiaomin Zhang
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China.
| | - Xiaorong Li
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, No. 251, Fukang Road, Nankai District, Tianjin, 300384, China.
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Li H, Zhang Z, Li Y, Su L, Duan Y, Zhang H, An J, Ni T, Li X, Zhang X. Therapeutic Effect of Rapamycin-Loaded Small Extracellular Vesicles Derived from Mesenchymal Stem Cells on Experimental Autoimmune Uveitis. Front Immunol 2022; 13:864956. [PMID: 35422798 PMCID: PMC9002107 DOI: 10.3389/fimmu.2022.864956] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 03/07/2022] [Indexed: 11/13/2022] Open
Abstract
Autoimmune uveitis is a major cause of vision loss and glucocorticoids are major traditional medications, which may induce serious complications. Rapamycin has been demonstrated to exhibit immunosuppressive effects and is promising to be used in treating uveitis by intravitreal injection. However, repeated and frequent intravitreal injections increase the risk of severe ocular complications, while the efficacy of subconjunctival injection of rapamycin is low since it is difficult for rapamycin to penetrate eyeball. Recently, small extracellular vesicles (sEVs) have attracted considerable research interest as natural drug delivery systems that can efficiently cross tissues and biological membranes. SEVs derived from mesenchymal stem cells (MSC-sEVs) also can exert immunosuppressive effect and ameliorate experimental autoimmune uveitis (EAU). The aim of this study was to construct a Rapamycin-loaded MSC-sEVs delivery system (Rapa-sEVs) and investigate its therapeutic effect on EAU by subconjunctival injection. Rapa-sEVs were prepared by sonication and characterized by nanoparticle tracking analysis, transmission electron microscopy, and western blotting. Clinical and histological scores were obtained to assess the treatment efficacy. Additionally, T cell infiltration was evaluated by flow cytometry. The results indicated that Rapa-sEVs could reach the retinal foci after subconjunctival injection. Compared to sEVs and rapamycin alone, Rapa-sEVs can produce a more marked therapeutic effect and reduce ocular inflammatory cell infiltration. Overall, MSC-sEVs have significant potential for the delivery of rapamycin to treat EAU. Subconjunctival injection of Rapa-sEVs may be contender for efficacious steroid-sparing immunomodulatory therapy.
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Affiliation(s)
- Huan Li
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Zhihui Zhang
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Yongtao Li
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Lin Su
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Yanan Duan
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Hui Zhang
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Jinying An
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Tianwen Ni
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Xiaorong Li
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Xiaomin Zhang
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
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Zhou J, Wu JS, Yan Y, Li J, Ni T, Shao W, Mei JH, Xiong WZ, Wu H. MiR-199a modulates autophagy and inflammation in rats with cerebral infarction via regulating mTOR expression. Eur Rev Med Pharmacol Sci 2021; 24:6338-6345. [PMID: 32572931 DOI: 10.26355/eurrev_202006_21532] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the roles of micro ribonucleic acid (miR)-199a in rats with cerebral infarction by regulating mammalian target of rapamycin (mTOR). MATERIALS AND METHODS A total of 36 Sprague-Dawley rats were randomly assigned into three groups, including: sham group (n=12), model group (n=12) and miR-199a mimics group (n=12). In sham group internal and external carotid arteries were exposed. The ischemia-reperfusion model was successfully established using suture embolization in the other two groups. After modeling, rats in sham group and model group were intraperitoneally injected with normal saline. However, rats in miR-199a mimics group were injected with miR-199a mimics. Following intervention for 3 d, sampling was conducted. Neurological deficit was evaluated in rats based on the Zea-Longa scoring system. Hematoxylin-eosin (HE) staining was performed to observe neuronal morphology. The expression of mTOR was detected using immunohistochemistry, and the relative expression level of tau protein was determined via Western blotting (WB). Besides, the messenger RNA (mRNA) expressions of mTOR and tau were detected by quantitative Polymerase Chain Reaction (qPCR). Finally, inflammatory factor content was measured through enzyme-linked immunosorbent assay (ELISA). RESULTS Model group and miR-199a mimics group exhibited a substantially higher Zea-Longa score than sham group (p<0.05). Compared with model group, the Zea-Longa score rose prominently in miR-199a mimics group (p<0.05). According to the results of HE staining, the structure of neurons in sham group was clear and intact, while the structure of neurons in model group was disordered. Meanwhile, neuronal morphology in miR-199a mimics group was significantly worse than that in model group (p<0.05). Immunohistochemistry results demonstrated that the positive expression level of mTOR was considerably upregulated in both model group and miR-199a mimics group in comparison with sham group (p<0.05). Moreover, its positive expression level in miR-199a mimics group was markedly higher that in model group (p<0.05). Based on the results of WB, model and miR-199a mimics groups exhibited a remarkably higher relative expression level of tau protein than sham group (p<0.05). However, the relative expression level of tau protein in miR-199a mimics group was prominently higher than that in model group (p<0.05). QPCR results manifested that the relative mRNA expression levels of mTOR and tau in model group and miR-199a mimics group were dramatically higher than those in sham group (p<0.05). Compared with those in model group, the relative mRNA expression levels of mTOR and tau increased significantly in miR-199a mimics group (p<0.05). ELISA results revealed that model group and miR-199a mimics group had prominently higher content of inflammatory factors than sham group (p<0.05). In addition, content of inflammatory factors in miR-199a mimics group was considerably higher than that in model group (p<0.05). CONCLUSIONS MiR-199a modulates mTOR expression to exert important regulatory effects on the autophagy and inflammation in rats with cerebral infarction.
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Affiliation(s)
- J Zhou
- Department of Internal Medicine, Wuhan Hospital of Traditional Chinese Medicine, Wuhan, China.
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Yao H, Lu W, Niu G, Zhang Q, Jiang Q, Liu H, Ni T. Characterizing the air pollution of the cities in the closure of corona virus disease 2019 in China. Int J Environ Sci Technol (Tehran) 2021; 18:2053-2062. [PMID: 33868434 PMCID: PMC8042843 DOI: 10.1007/s13762-021-03311-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 02/08/2021] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
With the rapid development of industrialization and urbanization in China, energy and vehicle consumption have continued to increase in recent years and air pollution has become serious. In early 2020, Corona Virus Disease 2019 broke out in Wuhan, China. From January 29, 2020, several sources of the air pollution almost all stopped working, including gasoline burning vehicles, dust producing building sites, coal-fired factories, etc. Five indicators of the atmospheric environmental quality were observed from December 19, 2019 to April 30, 2020 in nine cities and 1-h average concentrations, 24-h average concentrations and Air Quality Index were assessed. The 1-h average concentrations of the nitrogen dioxide, the ozone and the sulfur dioxide showed obvious difference though the closure did not change the sequence of the five pollutants' concentrations in the air at diverse sampling moments. The changing of the 24-h average concentrations of the five pollutants indicated the amount of pollutants in the air were greatly affected by human activities. The nitrogen dioxide, the sulfur dioxide and the particulate matters decreased obviously in the closure. The air in the metropolis and the south-east cities were relatively clean and the pollutants' concentrations decreased slightly during the closure period. The northern and the heavy industrial cities showed significant drop on air pollution indicators and the air quality of the two city groups could be greatly improved if some effective measures could be taken of environmental management and regional development.
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Affiliation(s)
- H. Yao
- School of Geography, Nantong University, Nantong, 226019 China
- Jiangsu Yangtze River Economic Belt Research Institute, Nantong, 226019 China
| | - W. Lu
- School of Geography, Nantong University, Nantong, 226019 China
- Jiangsu Yangtze River Economic Belt Research Institute, Nantong, 226019 China
| | - G. Niu
- School of Geography, Nantong University, Nantong, 226019 China
- Jiangsu Yangtze River Economic Belt Research Institute, Nantong, 226019 China
| | - Q. Zhang
- School of Geography, Nantong University, Nantong, 226019 China
- Jiangsu Yangtze River Economic Belt Research Institute, Nantong, 226019 China
| | - Q. Jiang
- School of Geography, Nantong University, Nantong, 226019 China
- Jiangsu Yangtze River Economic Belt Research Institute, Nantong, 226019 China
| | - H. Liu
- School of Geography, Nantong University, Nantong, 226019 China
- Jiangsu Yangtze River Economic Belt Research Institute, Nantong, 226019 China
| | - T. Ni
- School of Geographic and Oceanographic Science, Nanjing University, Nanjing, 210023 China
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Lu W, Wang Y, Zhang Q, Owen S, Green M, Ni T, Edwards M, Li Y, Zhang L, Harris A, Li JL, Jackson DG, Jiang S. TNF-derived peptides inhibit tumour growth and metastasis through cytolytic effects on tumour lymphatics. Clin Exp Immunol 2019; 198:198-211. [PMID: 31206614 DOI: 10.1111/cei.13340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/10/2019] [Indexed: 01/08/2023] Open
Abstract
Tumour necrosis factor (TNF) is a multi-functional cytokine with profound and diverse effects on physiology and pathology. Identifying the molecular determinants underlying the functions and pathogenic effects of TNF is key to understanding its mechanisms of action and identifying new therapeutic opportunities based on this important molecule. Previously, we showed that some evolutionarily conserved peptides derived from TNF could induce cell death (e.g. apoptosis and/or necrosis), a feature of immune defence mechanisms shared by many vertebrates. In this study, we demonstrated that necrosis-inducing peptide P16 kills human glioblastoma cancer cells and primary human hepatoma or renal cancer cells isolated from patients who had not responded to standard treatments. Importantly, we show that the necrosis-inducing peptide P1516 significantly improves survival by inhibiting tumour metastasis in a 4T1 breast cancer syngeneic graft mouse model. Because the lymphatic system is an important metastatic route in many cancers, we also tested the effect of TNF-derived peptides on monolayers of primary human lymphatic endothelial cells (hDLEC) and found that they increased junctional permeability by inducing cytoskeletal reorganization, gap junction formation and cell death. Transmission electron microscopy imaging evidence, structural analysis and in-vitro liposome leakage experiments strongly suggest that this killing is due to the cytolytic nature of these peptides. P1516 provides another example of a pro-cytotoxic TNF peptide that probably functions as a cryptic necrotic factor released by TNF degradation. Its ability to inhibit tumour metastasis and improve survival may form the basis of a novel approach to cancer therapy.
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Affiliation(s)
- W Lu
- Department of Oncology, University of Oxford, Oxford, UK.,Shanghai JW Inflinhix Co. Ltd, Shanghai, P.R. China.,Oxford Vacmedix (Changzhou) Co. Ltd, Changzhou City, Jiangsu Province, P.R. China
| | - Y Wang
- Department of Cardiovascular Medicine, Wellcome Trust Centre for Human Genetics, University of Oxford, UK
| | - Q Zhang
- Oxford Vacmedix (Changzhou) Co. Ltd, Changzhou City, Jiangsu Province, P.R. China
| | - S Owen
- Department of Oncology, University of Oxford, Oxford, UK
| | - M Green
- Department of Oncology, University of Oxford, Oxford, UK
| | - T Ni
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
| | | | - Y Li
- Department of Oncology, University of Oxford, Oxford, UK
| | - L Zhang
- Department of Oncology, University of Oxford, Oxford, UK
| | - A Harris
- Department of Oncology, University of Oxford, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, UK
| | - J-L Li
- Department of Oncology, University of Oxford, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, UK.,Institute of Translational and Stratified Medicine, Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth Science Park, Plymouth, PL6 8BU, UK
| | - D G Jackson
- MRC Human Immunology Unit, Radcliffe Department of Medicine, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - S Jiang
- Department of Oncology, University of Oxford, Oxford, UK.,Shanghai JW Inflinhix Co. Ltd, Shanghai, P.R. China.,Oxford Vacmedix (Changzhou) Co. Ltd, Changzhou City, Jiangsu Province, P.R. China.,Oxford Vacmedix UK Ltd, Oxford, UK
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Li M, Fang Y, Yao M, Yu WR, Ni T, Gu C, Yang PG, Mao ZG. [Effects of transforming growth factor β1 receptor inhibitor SD-208 on human hypertrophic scar]. Zhonghua Shao Shang Za Zhi 2017; 32:389-95. [PMID: 27464628 DOI: 10.3760/cma.j.issn.1009-2587.2016.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the effects of transforming growth factor β1 (TGF-β1) receptor inhibitor SD-208 on human hypertrophic scar and its mechanisms. METHODS Scar fibroblasts were isolated from deprecated human hypertrophic scar tissue and then sub-cultured. Cells of the fifth passage were used in the following experiments. (1) Cells were divided into blank control group (BC) and 0.5, 1.0, 3.0, and 5.0 μmol/L SD-208 groups according to the random number table (the same grouping method below), with 6 wells in each group. Cells in group BC were added with 1 μL phosphate buffer solution, while cells in the latter four groups were added with 0.5, 1.0, 3.0, and 5.0 μmol/L SD-208, respectively. After being cultured for 12 hours, the proliferation activity of cells was detected by cell counting kit 8 and microplate reader (denoted as absorbance value). Suitable amount of substance concentration of SD-208 according to the results of proliferation activity of cells was chosen for the following experiments. (2) Another batch of cells were divided into group BC and 1, 3 μmol/L SD-208 groups and treated as in (1), with 8 wells in each group. The number of migration cells was detected by transwell method. (3) Another batch of cells were grouped and treated as in (2), and the microfilament morphology of cells was observed by rhodamine-phalloidin staining. (4) Another batch of cells were grouped and treated as in (2), and the protein expression of TGF-β1 was assessed with Western blotting. (5) Forty-eight BALB/c nude mice were divided into normal saline group (NS) and 1 μmol/L SD-208 group, and one longitudinal incision with length of 1 cm was made on their back. Then human hypertrophic scar tissue was embedded into the incision. On post injury day 7, multipoint injection of NS in a volume of 0.05 mL was performed in wounds of rats in group NS, while rats in 1 μmol/L SD-208 group were given 0.05 mL 1 μmol/L SD-208, once a day. On the day 0 (the same day), 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20 post first time of injection, the weight of 8 nude mice was weighed by electronic scale, and scar area was measured by vernier caliper and the ratio of rest scar area was calculated. (6) In week 1, 2, and 3 post first time of injection, the protein expression of TGF-β1 of human hypertrophic scar tissue was assessed with Western blotting. Data were processed with one-way analysis of variance and two independent-sample t test. RESULTS (1) The proliferation activity of cells in group BC, 0.5, 1.0, 3.0, and 5.0 μmol/L SD-208 groups was respectively 1.00±0.03, 0.90±0.08, 0.68±0.11, 0.54±0.04, and 0.42±0.09, and the proliferation activity of cells in 0.5, 1.0, 3.0, and 5.0 μmol/L SD-208 groups was significantly lower than that in group BC (with t values from 2.9 to 22.1, P<0.05 or P<0.01). (2) The number of migration cells in 1, 3 μmol/L SD-208 groups was significantly less than that in group BC (with t values respectively 6.5 and 6.4, P values below 0.01). (3) Compared with that in group BC, fluorescence intensity of microfilaments of cells in 1, 3 μmol/L SD-208 groups was attenuated, and the pseudopod extended less. (4) The protein expressions of TGF-β1 of cells in group BC and 1, 3 μmol/L SD-208 groups were respectively 1.00±0.08, 0.80±0.08, and 0.61±0.05, and the protein expressions of TGF-β1 of cells in 1, 3 μmol/L SD-208 groups were significantly lower than those in group BC (with t values respectively 4.0 and 9.2, P values below 0.01). (5) The weights of nude mice in group NS and 1 μmol/L SD-208 group were similar on each time day (with t values from 0.2 to 1.1, P values above 0.05). The ratios of rest scar area of nude mice in two groups were decreased along with the injection time, and the ratios of rest scar area of nude mice in 1 μmol/L SD-208 group were significantly less than those in group NS from the day 6 to 20 post first time of injection (with t values from 1.8 to 15.9, P<0.05 or P<0.01). In week 1, 2, and 3 post first time of injection, the protein expressions of TGF-β1 of human hypertrophic scar tissue in nude mice in two groups showed a tendency of decrease, and the protein expressions of TGF-β1 of human hypertrophic scar tissue in nude mice in 1 μmol/L SD-208 group were significantly lower than those in group NS (with t values from 6.2 to 19.1, P values below 0.01). CONCLUSIONS SD-208 has significant inhibition effect on human hypertrophic scars, and the mechanism is correlated to the inhibition of protein expression of endogenous TGF-β1.
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Affiliation(s)
- M Li
- Department of Burns and Plastic Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 201999, China
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Ni T, Liu Y, Huang Y, Sun X, Wang J, Wang YD. Hysteroscopy combined dilatation and curettage, serum CA125 and CA19-9 play an important role in preserving fertility or endocrine function for early-stage endometrial cancer patients. EUR J GYNAECOL ONCOL 2017; 38:49-53. [PMID: 29767864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE The aim of the study was to evaluate the role of hysteroscopy combined dilatation and curettage (D&C), serum CA125 and CA19-9 in endometrial cancer (EC) patients who desire to preserve fertility or endocrine function. MATERIALS AND METHODS This retrospective study included a total of 622 patients with EC between January 2006 and December 2014. The consistency of preoperative and postoperative histopathological findings were compared in patients who underwent D&C with or without hysteroscopy. The incidence of positive peritoneal cytology was also compared to assess the safety of hysteroscopy. Receiver operating characteristic (ROC) curve was used to evaluate the role of preoperative serum CA125 and CA19-9 in predicting extrauterine metastasis. RESULTS In 151 patients who underwent hysteroscopy combined D&C, the consistency of pre- and postoperative pathology was higher than the remaining 447 patients who underwent classical D&C alone (83.44% vs. 74.94%,p < 0.05) and there was no significant difference in the incidence of positive peritoneal cytology between the two groups (2.64% vs. 2.73%, p > 0.05). ROC curve analysis results showed the CA125 serum level of 31.75 U/ml and CA19-9 serum level of 35.40 U/ml were the best cutoff to predict extrauterine metastasis in endometrial cancer, with 66.7% sensitivity, 83% specificity, and 61.9% sensitivity and 84.9% of specificity, respectively. CONCLUSIONS Hysteroscopy combined D&C should be recommended for early-stage EC patients who desire to preserve fertility or endocrine function, and the preoperative serum levels of CA125 and CA19-9 were powerful in predicting tumor stage in these patients.
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Ni T, Sun X, Shan B, Wang J, Liu Y, Gu SL, Wang YD. Detection of circulating tumour cells may add value in endometrial cancer management. Eur J Obstet Gynecol Reprod Biol 2016; 207:1-4. [PMID: 27756035 DOI: 10.1016/j.ejogrb.2016.09.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Revised: 08/02/2016] [Accepted: 09/21/2016] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To evaluate the role of circulating tumour cells (CTCs) in patients with endometrial cancer (EC). STUDY DESIGN This study included 40 patients with a pre-operative diagnosis of high-risk EC between April 2015 and May 2016. Patients were further divided into high-risk (grade 3, non-endometrioid, myometrial invasion ≥1/2 and stage III-IV) and high-intermediate-risk (grade 2-3, endometrioid, myometrial invasion <1/2 and stage I-II) groups according to postoperative pathological results. CTCs were detected using the CellSearch system, and CTC results were correlated with standard clinicopathological characteristics and serum tumour marker CA125/HE4 status using Chi-squared test, continuity correction or Fisher's exact test. The pharmacodynamic effect was detected after the first cycle of adjuvant therapy. Patients were followed up for 13 months to assess outcomes. RESULTS Fifteen percent of patients had one or more CTCs. The presence of CTCs was found to be significantly associated with cervical involvement (83.33% vs 11.76%, p=0.00). No significant difference in CTC-positive rates was detected between the high-risk and high-intermediate-risk groups, and no significant correlation was found between CTCs and serum CA125/HE4, either by positive rates or exact serum levels of the conventional tumour markers. No more CTCs were detected after the first cycle of standard chemotherapy in this study, and no distant metastases or recurrence were found in the CTC-positive patients during the follow-up period. CONCLUSION The presence of CTCs was correlated with cervical involvement. Early-stage EC patients with CTCs may benefit from additional adjuvant therapies. Assessment of CTCs may be useful in the management of high-risk EC patients.
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MESH Headings
- Adult
- Aged
- Biomarkers, Tumor/blood
- CA-125 Antigen/blood
- Carcinoma, Endometrioid/blood
- Carcinoma, Endometrioid/pathology
- Carcinoma, Endometrioid/secondary
- Carcinoma, Endometrioid/therapy
- Cervix Uteri/drug effects
- Cervix Uteri/pathology
- Cervix Uteri/surgery
- Chemotherapy, Adjuvant
- Cystadenocarcinoma, Serous/blood
- Cystadenocarcinoma, Serous/pathology
- Cystadenocarcinoma, Serous/secondary
- Cystadenocarcinoma, Serous/therapy
- Endometrial Neoplasms/blood
- Endometrial Neoplasms/pathology
- Endometrial Neoplasms/prevention & control
- Endometrial Neoplasms/therapy
- Endometrium/drug effects
- Endometrium/pathology
- Endometrium/surgery
- Female
- Follow-Up Studies
- Humans
- Membrane Proteins/blood
- Middle Aged
- Myometrium/drug effects
- Myometrium/pathology
- Myometrium/surgery
- Neoplasm Grading
- Neoplasm Invasiveness
- Neoplasm Recurrence, Local/prevention & control
- Neoplasm Staging
- Neoplastic Cells, Circulating/drug effects
- Neoplastic Cells, Circulating/pathology
- Proteins/analysis
- Uterine Cervical Neoplasms/drug therapy
- Uterine Cervical Neoplasms/prevention & control
- Uterine Cervical Neoplasms/secondary
- Uterine Cervical Neoplasms/surgery
- Uterine Neoplasms/drug therapy
- Uterine Neoplasms/prevention & control
- Uterine Neoplasms/secondary
- Uterine Neoplasms/surgery
- WAP Four-Disulfide Core Domain Protein 2
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Affiliation(s)
- T Ni
- Department of Gynaecology, International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - X Sun
- Laboratory of Gynaecologic Oncology, International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - B Shan
- Fudan University Shanghai Cancer Centre, Shanghai, China
| | - J Wang
- Department of Gynaecology, International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Y Liu
- Department of Gynaecology, International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - S-L Gu
- Department of Gynaecology, International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Y-D Wang
- Department of Gynaecology, International Peace Maternity and Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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10
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Zajic S, Rossenu S, Hreniuk D, Kesisoglou F, McCrea J, Liu F, Sun L, Witter R, Gauthier D, Helmy R, Joss D, Ni T, Stoltz R, Stone J, Stoch SA. The Absolute Bioavailability and Effect of Food on the Pharmacokinetics of Odanacatib: A Stable-Label i.v./Oral Study in Healthy Postmenopausal Women. Drug Metab Dispos 2016; 44:1450-8. [DOI: 10.1124/dmd.116.069906] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 07/08/2016] [Indexed: 11/22/2022] Open
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11
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Wu QY, Li WW, Li N, Li TF, Zhang C, Ni T, Cui YX, Li XJ, Xia XY. A novel nonsense mutation of ADAR1 gene in a Chinese patient with dyschromatosis symmetrica hereditaria. J Eur Acad Dermatol Venereol 2014; 28:1832-3. [PMID: 24673593 DOI: 10.1111/jdv.12381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Q-Y Wu
- Institute of Laboratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China
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12
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Abstract
This study aimed to identify marker genes in diabetic wounds using a dataset based on a DNA microarray of dermal lymphatic endothelial cells, and our results provide a basic understanding of diabetic wounds through further study of these differentially expressed genes (DEGs). From the Gene Expression Omnibus database, we downloaded a gene expression microarray (GSE38396) that includes 8 samples: 4 normal controls and 4 disease samples (type II diabetes). We then identified genes that were differentially expressed between normal and disease samples using packages in R language, constructed a protein-protein interaction (PPI) network and analyzed modules in the network. In addition, phylogenetic analysis was performed by MEGA to find the most conserved genes. Two hundred and thirteen genes were identified as being differentially expressed between normal and disease samples, and we constructed a PPI network that included 213 pairs of proteins. We then identified a module including 20 genes, the function of which was significantly enriched in wounding response. Lastly, the most conserved genes, CD44 and CCL5, were identified through phylogenetic analysis. In summary, we found differentially expressed marker genes, a wounding response-related module, and the most important genes CD44 and CCL5. Our findings suggest new approaches to therapies for diabetic wounds.
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Affiliation(s)
- T Ni
- Department of Burn and Plastic Surgery, No. 3 People's Hospital and Institute of Traumatic Medicine, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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13
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Ni T, Pinson JA, Gupta S, Santoro RJ. Two-dimensional imaging of soot volume fraction by the use of laser-induced incandescence. Appl Opt 1995; 34:7083-7091. [PMID: 21060570 DOI: 10.1364/ao.34.007083] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A recently developed laser-induced incandescence technique is used to make novel planar measurements of soot volume fraction within turbulent diffusion flames and droplet flames. The two-dimensional imaging technique is developed and assessed by systematic experiments in a coannular laminar diffusion flame, in which the soot characteristics have been well established. With a single point calibration procedure, agreement to within 10% was found between the values of soot volume fraction measured by this technique and those determined by conventional laser scattering-extinction methods in the flame. As a demonstration of the wide range of applicability of the technique, soot volume fraction images are also obtained from both turbulent ethene diffusion flames and from a freely falling droplet flame that burns the mixture of 75% benzene and 25% methanol. For the turbulent diffusion flames, approximately an 80% reduction in soot volume fraction was found when the Reynolds number of the fuel jet increased from 4000 to 8000. In the droplet flame case, the distribution of soot field was found to be similar to that observed in coannular laminar diffusion flames.
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Dai S, Qi S, Zhang L, Bai C, Ni T, Deng X. Laser Raman spectrometry study on experimental galactose-induced cataract. Yan Ke Xue Bao 1995; 11:143-6. [PMID: 8758842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
PURPOSE To observe the dynamic changes of hydration in galactose induced cataract. METHODS Two groups of Wistar rats were used in the experiment. There were 12 rats in the experimental group, which were fed diet of 50% D-Galactose standard feed; while the control group had 8 rats fed standard feed. Their other living conditions were the same. At desired time periods, two Wistar rats fed galactose and one normal control were selected and killed 20 minutes before the instrument examination respectively, then, their lenses were removed from the orbs by a posterior approach. The cleaned fresh lens was placed in a quartz cuvette with Tris buffered balanced salt solution containing 5.5 mmol/L glucose. The quartz cuvette was placed on the stage of the Spectrometer. The laser beam was focused at the lens nuclear from the bottom of the cuvette and the scattered light was collected at 90 degrees to the incident beam. RESULTS Raman spectroscopy showed that (1) during the formation of galactose cataract, the water signal (at 3390cm-1) increased obviously, and the ratio of I3390/I2935 increased from 0.31 (3 days) to 2.26 (17 days), which is correlated with the imbibition of water in the lens nuclear; (2) the hydration of lens nuclear could be divided into two phases. The ratio I3390/I2935 was increased slowly and steadily by 11 days after galactose feeding. Then, the ratio turned to increase quite fast till 17 days. CONCLUSION The hydration of nuclear is changed simultaneously with the formation of cataract. The hydration of nuclear is mainly due to the imbalance of Na+/K+.
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Affiliation(s)
- S Dai
- Department of Ophthalmology, First Affiliated Hospital, Lan Zhou Medical College, China
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15
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Snyder RO, Im DS, Ni T, Xiao X, Samulski RJ, Muzyczka N. Features of the adeno-associated virus origin involved in substrate recognition by the viral Rep protein. J Virol 1993; 67:6096-104. [PMID: 8396670 PMCID: PMC238031 DOI: 10.1128/jvi.67.10.6096-6104.1993] [Citation(s) in RCA: 102] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
We previously demonstrated that the adeno-associated virus (AAV) Rep68 and Rep78 proteins are able to nick the AAV origin of DNA replication at the terminal resolution site (trs) in an ATP-dependent manner. Using four types of modified or mutant substrates, we now have investigated the substrate requirements of Rep68 in the trs endonuclease reaction. In the first kind of substrate, portions of the hairpinned AAV terminal repeat were deleted. Only deletions that retained virtually all of the small internal palindromes of the AAV terminal repeat were active in the endonuclease reaction. This result confirmed previous genetic and biochemical evidence that the secondary structure of the terminal repeat was an important feature for substrate recognition. In the second type of substrate, the trs was moved eight bases further away from the end of the genome. The mutant was nicked at a 50-fold-lower frequency relative to a wild-type origin, and the nick occurred at the correct trs sequence despite its new position. This finding indicated that the endonuclease reaction required a specific sequence at the trs in addition to the correct secondary structure. It also suggested that the minimum trs recognition sequence extended three bases from the cut site in the 3' direction. The third type of substrate harbored mismatched base pairs at the trs. The mismatch substrates contained a wild-type sequence on the strand normally cut but an incorrect sequence on the complementary strand. All of the mismatch mutants were capable of being nicked in the presence of ATP. However, there was substantial variation in the level of activity, suggesting that the sequence on the opposite strand may also be recognized during nicking. Analysis of the mismatch mutants also suggested that a single-stranded trs was a viable substrate for the enzyme. This interpretation was confirmed by analysis of the fourth type of substrate tested, which contained a single-stranded trs. This substrate was also cleaved efficiently by the enzyme provided that the correct strand was present in the substrate. In addition, the single-stranded substrate no longer required ATP as a cofactor for nicking. Finally, all of the substrates with mutant trss bound the Rep protein as efficiently as the wild-type did. This finding indicated that the sequence at the cut site was not involved in recognition of the terminal repeat for specific binding by the enzyme. We concluded that substrate recognition by the AAV Rep protein involves at least two and possibly as many as four features of the AAV terminal repeat.(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- R O Snyder
- Department of Microbiology, State University of New York at Stony Brook Medical School 11794-8621
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Xu RM, Ni T, Xu XD. Two new species of Tabanus from Hubei, China (Diptera: Tabanidae). Acta Acad Med Wuhan 1984; 4:229-230. [PMID: 6527847 DOI: 10.1007/bf02857169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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