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Hu X, Gong N, Zhang Q, Chen Q, Xie T, Liu H, Li Y, Li Y, Peng W, Zhang F, Fan X. N-Terminalized Ti 3 C 2 T x MXene for Supercapacitor with Extraordinary Pseudocapacitance Performance. Small 2024; 20:e2306997. [PMID: 37823688 DOI: 10.1002/smll.202306997] [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] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/25/2023] [Indexed: 10/13/2023]
Abstract
MXenes have demonstrated significant potential in electrochemical energy storage, particularly in supercapacitors, owing to their exceptional properties. The surface terminal groups of MXene play a pivotal role in pseudocapacitive mechanism. Considering the hindered electrolyte ion transport caused by -F terminal groups and the limited ion binding sites associated with -O terminal groups, this study proposes a novel strategy of replacing -F with -N terminal groups. The modulated MXene-N electrode, featuring a substantial number of -N terminal groups, demonstrates an exceptionally high gravimetric capacitance of 566 F g-1 (at a scan rate of 2 mV s-1 ) or 588 F g-1 (at a discharge rate of 1 A g-1 ) in 1 м H2 SO4 electrolyte, and the potential window is significantly increased. Furthermore, subsequent spectra analysis and density functional theory calculations are employed to investigate the mechanism associated with -N terminal groups. This work exemplifies the significance of terminal modulation in the context of electrochemical energy storage.
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Affiliation(s)
- Xuewen Hu
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
| | - Ning Gong
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
| | - Qicheng Zhang
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
| | - Qiming Chen
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
| | - Tianzhu Xie
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
| | - Huibin Liu
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
| | - Yan Li
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
| | - Yang Li
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
| | - Wenchao Peng
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
| | - Fengbao Zhang
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
| | - Xiaobin Fan
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, 300072, China
- Zhejiang Institute of Tianjin University, Shaoxing, Zhejiang, 312300, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China
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2
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Gong N, Yao N. A generalized decoding method for neural text generation. COMPUT SPEECH LANG 2023. [DOI: 10.1016/j.csl.2023.101503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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3
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Fang T, Liu H, Luo X, Gong N, Sun M, Peng W, Li Y, Zhang F, Fan X. Accommodation of Two-Dimensional SiO x in a Point-to-Plane Conductive Network Composed of Graphene and Nitrogen-Doped Carbon for Robust Lithium Storage. ACS Appl Mater Interfaces 2022; 14:53658-53666. [PMID: 36400752 DOI: 10.1021/acsami.2c13824] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Silicon oxides (SiOx) are one of the most promising anode materials for next-generation lithium-ion batteries owing to their abundant reserve and low lost and high reversible capacity. However, the practical application of SiOx is still hindered by their intrinsically low conductivity and huge volume change. In this regard, we design a novel anode material in which sheet-like SiOx nanosheets are encapsulated in a unique point-to-plane conductive network composed of graphene flakes and nitrogen-doped carbon spheres. This unique composite structure demonstrates high specific capacity (867.7 mAh g-1 at 0.1 A g-1), superior rate performance, and stable cycle life. The electrode delivers a superior reversible discharge capacity of 595.8 mAh g-1 after 200 cycles at 1.0 A g-1 and 287.5 mAh g-1 after 500 cycles at 5.0 A g-1. This work may shed light on the rational design of SiOx-based anode materials for next-generation high-performance lithium-ion batteries.
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Affiliation(s)
- Tiantian Fang
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin300072, China
| | - Huibin Liu
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin300072, China
| | - Xinyu Luo
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin300072, China
| | - Ning Gong
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin300072, China
| | - Mengru Sun
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin300072, China
| | - WenChao Peng
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin300072, China
| | - Yang Li
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin300072, China
| | - Fengbao Zhang
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin300072, China
| | - Xiaobin Fan
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin300192, China
- Institute of Shaoxing, Tianjin University, Zhejiang312300, China
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Zhou BQ, He QN, Qin CX, Lu J, Chai XN, Zhu JC, Gong N. [Research progress on the relationship between dietary patterns and metabolic-associated fatty liver disease]. Zhonghua Gan Zang Bing Za Zhi 2022; 30:1012-1016. [PMID: 36299200 DOI: 10.3760/cma.j.cn501113-20210508-00226] [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: 06/16/2023]
Abstract
Globally, metabolic-asssociated fatty liver disease has become a significant health burden due to its complex pathogenesis, and there are no specific and effective therapeutic drugs to date. The onset and progression of metabolic-asssociated fatty liver disease is closely associated with improper dietary habits. The cornerstone to treat metabolic-asssociated fatty liver disease is weight loss through a well-balanced diet. This article summarizes and discusses the research progress at home and abroad in relationship to metabolic-asssociated fatty liver disease and dietary patterns such as the Mediterranean diet, the DASH diet, an energy-restricted balanced diet, a low fat diet, a low carbohydrate diet, a western diet, an animal food diet, a traditional diet, and others. In addition, it categorizes the effects of various dietary patterns on the prevention, treatment, or induction of several issues that need further metabolic-asssociated fatty liver disease research for subsequent reference.
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Affiliation(s)
- B Q Zhou
- Xiangya School of Nursing, Central South University, Changsha 410013, China
| | - Q N He
- The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - C X Qin
- Department of Health Management Center, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - J Lu
- Department of Urology, Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - X N Chai
- Xiangya School of Nursing, Central South University, Changsha 410013, China
| | - J C Zhu
- Jishou University School of Medicine, Jishou 416000, China
| | - N Gong
- Department of Nursing, Third Xiangya Hospital, Central South University, Changsha 410013, China
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Gong Y, Gong N, Zhang Z, He Y, Tang H. Effect of Narrative Therapy-Based Group Psychological Counseling on Internet Addiction among Adolescents. Iran J Public Health 2022; 51:1331-1338. [PMID: 36447965 PMCID: PMC9659539 DOI: 10.18502/ijph.v51i6.9678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 03/15/2022] [Indexed: 06/01/2023]
Abstract
BACKGROUND There are a large number of psychological problems caused by Internet addiction. We aimed to explore the intervention effect of narrative therapy in combination with Pilates exercise on Internet addiction among adolescents. METHOD From July 2021 to October 2021, 42 adolescents with Internet addiction selected from four communities in Yiyang City of China were randomly divided into the intervention and control groups with 21 members in each group. The intervention group participated in the intervention of narrative therapy in combination with Pilates exercise eight times, whereas the control group did not receive any intervention. The 12-item General Health Questionnaire, Self-rating Young's Diagnostic Questionnaire of Internet Addiction, and Positive Affect Subscale were used to measure the psychological indexes of the adolescents before and after the intervention. RESULTS Compared with those in the control group, the adolescents in the intervention group had an obvious decrease in the degree of Internet addiction with a statistically significant difference before and after the intervention (P < 0.001). After the intervention, the intervention group had significantly higher mental health scores and significantly lower scores for anxiety, depression, social dysfunction, and loss of interest than the control group. After the intervention, the intervention group showed an obvious increase in the score for positive affect with a statistically significant difference before and after the intervention (P < 0.001). CONCLUSION The intervention method proposed in this study could effectively solve the problem of Internet addiction among adolescents.
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Liu Y, Yin X, Zhao H, Shu W, Xin F, Wang H, Luo X, Gong N, Xue X, Pang Q, Xing M, Tian Y. Near-infrared-emitting upconverting BiVO 4 nanoprobes for in vivo fluorescent imaging. Spectrochim Acta A Mol Biomol Spectrosc 2022; 270:120811. [PMID: 35016063 DOI: 10.1016/j.saa.2021.120811] [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] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 12/20/2021] [Accepted: 12/22/2021] [Indexed: 06/14/2023]
Abstract
Near-infrared (NIR) emitting BiVO4:Yb3+,Tm3+ nanoparticles are synthesized by a new solvothermal strategy using solvents of oleic acid and methanol. The obtained BiVO4:Yb3+,Tm3+ samples show an average particle size of ≈164 nm and exhibit an asymmetry monoclinic crystal structure of BiVO4. At NIR excitation of 980 nm, the BiVO4:Yb3+,Tm3+ sample exhibits a nearly single NIR emission at ≈796 nm with extremely weak blue emissions from Tm3+ ions. These high-energy visible emissions are absorbed by the semiconducting host of BiVO4 that possesses a bandgap of ≈2.2 eV. Therefore, the NIR excitation to a single intense NIR emission fluorescent BiVO4 materials could be a potential ideal probe for deep-tissue high-resolution bioimaging. To validate the ability of BiVO4 materials for bio-applications, we conduct the cytotoxicity experiments. The results show that the cytotoxicity of HeLa cells is negligible at a concentration of 0.2 mg/ml of BiVO4:Yb3+,Tm3+ , and the cell viability approaches 90% at a high dosage of 0.5 mg/ml. The Daphnia magna and Zebrafish treated with nanoparticles (0.5 mg/ml) display bright NIR emission without any background, indicating the excellent in vivo fluorescent imaging capacity of BiVO4:Yb3+,Tm3+ nanoparticles. Our findings offer an environment-friendly strategy to synthesize BiVO4 UCL nanophosphors and provide a promising new class of fluorescent probes for biological applications.
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Affiliation(s)
- Yuwei Liu
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, PR China
| | - Xiumei Yin
- Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials & Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, PR China
| | - Hengzhi Zhao
- Beijing Key Laboratory of Photo-electronic/Electro-Photonic Conversion Materials, Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, PR China
| | - Wei Shu
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo 255049, PR China
| | - Fangyun Xin
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, PR China.
| | - Hong Wang
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, PR China
| | - Xixian Luo
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, PR China; Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials & Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian 116600, PR China
| | - Ning Gong
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, PR China
| | - Xiaohong Xue
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, PR China
| | - Qiang Pang
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, PR China
| | - Mingming Xing
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, PR China.
| | - Ying Tian
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, PR China.
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Abstract
Finding a desirable sampling estimator has a profound impact on the development of static word embedding models, such as continue-bag-of-words (CBOW) and skip gram (SG), which have been generally accepted as popular low-resource algorithms to generate task-agnostic word representations. Due to the prevalence of large-scale pretrained models, less attention has been paid to these static models in the recent years. However, compared with the dynamic embedding models (e.g., BERT), these static models are straightforward to interpret, cost effective to train, and out-of-box to deploy, thus are still widely used in various downstream models until now. Therefore, it is still of considerable significance to study and improve them, especially the crucial components shared by these static models. In this article, we focus on negative sampling (NS), a key component shared by the sampling-based static models, by investigating and mitigating some critical problems of the sampling core. Concretely, we propose Seeds, a sampling enhanced embedding framework, to learn static word embeddings by a new algorithmic innovation for replacing the NS estimator, in which multifactor global priors are considered dynamically for different training pairs. Then, we implement this framework by four concrete models. For the first two implementations, namely CBOW-GP and SG-GP, both negative words and positive auxiliaries are sampled. And for the other two implementations, CBOW-GN and SG-GN, estimations are simplified by sampling only the negative instances. Extensive experimental results across a variety of standard intrinsic and extrinsic tasks demonstrate that embeddings learned by the proposed models outperform their NS-based counterparts, such as CBOW-NS and SG-NS, as well as other strong baselines.
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8
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Gong N, Yao N. GeSe: Generalized static embedding. APPL INTELL 2022. [DOI: 10.1007/s10489-021-03001-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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9
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Chen Q, Gong N, Zhu T, Yang C, Peng W, Li Y, Zhang F, Fan X. Surface Phase Engineering Modulated Iron-Nickel Nitrides/Alloy Nanospheres with Tailored d-Band Center for Efficient Oxygen Evolution Reaction. Small 2022; 18:e2105696. [PMID: 34837326 DOI: 10.1002/smll.202105696] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/14/2021] [Indexed: 06/13/2023]
Abstract
The oxygen evolution reaction (OER) plays a key role in many electrochemical energy conversion systems, but it is a kinetically sluggish reaction and requires a large overpotential to deliver appreciable current, especially for the non-noble metal electrocatalysts. In this study, the authors report a surface phase engineering strategy to improve the OER performance of transition metal nitrides (TMNs). The iron-nickel nitrides/alloy nanospheres (FeNi3 -N) wrapped in carbon are synthesized, and the optimized FeNi3 -N catalyst displays dual-phase nitrides on the surface induced by atom migration phenomenon, resulting from the different migration rates of metal atoms during the nitridation process. It shows excellent OER performance in alkaline media with an overpotential of 222 mV at 10 mA cm-2 , a small Tafel slope of 41.53 mV dec-1 , and long-term durability under high current density (>0.5 A cm-2 ) for at least 36 h. Density functional theory (DFT) calculations further reveal that the dual-phase nitrides are favorable to decrease the energy barrier, modulate the d-band center to balance the absorption and desorption of the intermediates, and thus promote the OER electrochemical performance. This strategy may shed light on designing OER and other catalysts based on surface phase engineering.
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Affiliation(s)
- Qiming Chen
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Ning Gong
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Tanrui Zhu
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Changyu Yang
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Wenchao Peng
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, 515031, P. R. China
| | - Yang Li
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, 515031, P. R. China
| | - Fengbao Zhang
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Xiaobin Fan
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, 515031, P. R. China
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10
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Wang Y, Gong N, Fu C. Major depression disorder diagnosis and analysis based on structural magnetic resonance imaging and deep learning. J Integr Neurosci 2021; 20:977-984. [PMID: 34997720 DOI: 10.31083/j.jin2004098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/02/2021] [Accepted: 12/09/2021] [Indexed: 11/06/2022] Open
Abstract
Major depression disorder is one of the diseases with the highest rate of disability and morbidity and is associated with numerous structural and functional differences in neural systems. However, it is difficult to analyze digital medical imaging data without computational intervention. A voxel-wise densely connected convolutional neural network, Three-dimensional Densenet (3D-DenseNet), is proposed to mine the feature differences. In addition, a novel transfer learning method, called Alzheimer's Disease Neuroimaging Initiative Transfer (ADNI-Transfer), is designed and combined with the proposed 3D-DenseNet. The experimental results on a database that contains 174 subjects, including 99 patients with major depression disorder and 75 healthy controls, show that large changes in brain structures between major depressive disorder patients and healthy controls mainly are located in the regions including superior frontal gyrus, dorsolateral, middle temporal gyrus, middle frontal gyrus, postcentral gyrus, inferior temporal gyrus. In addition, the proposed deep learning network can better extract different features of brain structures between major depressive disorder patients and healthy controls and achieve excellent classification results of major depressive disorder. At the same time, the designed transfer learning method can further improve classification performance. These results verify that our proposed method is feasible and valid for diagnosing and analyzing major depression disorder.
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Affiliation(s)
- Yu Wang
- Beijing Key Laboratory of Big Data Technology for Food Safety, School of Artificial Intelligence, Beijing Technology and Business University, 100048 Beijing, China
| | - Ning Gong
- Beijing Key Laboratory of Big Data Technology for Food Safety, School of Artificial Intelligence, Beijing Technology and Business University, 100048 Beijing, China
| | - Changyang Fu
- Beijing Key Laboratory of Big Data Technology for Food Safety, School of Artificial Intelligence, Beijing Technology and Business University, 100048 Beijing, China
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11
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Liu L, Wang M, Gong N, Tian P, Deng H. Se improves GPX4 expression and SOD activity to alleviate heat-stress-induced ferroptosis-like death in goat mammary epithelial cells. Anim Cells Syst (Seoul) 2021; 25:283-295. [PMID: 34745435 PMCID: PMC8567913 DOI: 10.1080/19768354.2021.1988704] [Citation(s) in RCA: 3] [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] [Indexed: 01/20/2023] Open
Abstract
Selenium (Se) is a vital element of life, which has an important impact on the growth, development, production performance and stress-tolerance of animals. However, it is not entirely clear that how exactly Se works during these processes. Herein, we investigate the role of Se in regulating the functions of goat mammary epithelial cells (GMECs) under heat-stress condition. We found that heat stress caused ferroptosis-like death in GMECs, manifested by a robust increase in iron ion concentration, reactive oxygen species (ROS) and cell death ratio, and a decrease in the activity of superoxide dismutase (SOD) and expression level of glutathione peroxidases 4 (GPX4). Se incubation had no obvious effect on GMEC viability, but alleviated heat-stress-induced ferroptosis-like cell death and improved GPX4 expression and SOD activity in a dose-dependent manner. Also, we found that overexpression of GPX4 could improve the activity of SOD. And Se incubation inhibited activation of mTOR signaling in heat-stress-induced GMECs, which could be eliminated by the mTOR activator MHY1485, and treatment with mTOR inhibitor AY-22989 had the same effect as Se. In conclusion, Se improves GPX4 expression and SOD activity and inhibits the activation of mTOR to alleviate heat-stress-induced ferroptosis-like death in GMECs, which may be a protective agent for heat stress in goats.
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Affiliation(s)
- Lu Liu
- College of Chemistry & Pharmacy, Northwest Agricultural & Forestry University, Yangling, People's Republic of China
| | - Manjiang Wang
- Fuping County Animal Epidemic Prevention Control Center, Xianyang, People's Republic of China
| | - Ning Gong
- College of Chemistry & Pharmacy, Northwest Agricultural & Forestry University, Yangling, People's Republic of China
| | - Peng Tian
- College of Chemistry & Pharmacy, Northwest Agricultural & Forestry University, Yangling, People's Republic of China
| | - Hongxia Deng
- College of Chemistry & Pharmacy, Northwest Agricultural & Forestry University, Yangling, People's Republic of China
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12
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Liu CY, Gong N, Liu W. The Association Between Preoperative Frailty and Postoperative Delirium: A Systematic Review and Meta-analysis. J Perianesth Nurs 2021; 37:53-62.e1. [PMID: 34756625 DOI: 10.1016/j.jopan.2020.12.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 12/13/2020] [Accepted: 12/26/2020] [Indexed: 12/23/2022]
Abstract
PURPOSE Identifying factors that place patients at high risk for developing postoperative delirium is an important first step to reduce incidence. Frailty is associated with poor postoperative outcomes. This meta-analysis aims to determine the association between preoperative frailty and postoperative delirium. DESIGN This is a systematic review and meta-analysis. METHODS We used PubMed, Scopus, Embase, CINAHL, Cochrane, and Web of Science as databases for the search up to April 23, 2020. We included cohort studies that assessed postoperative delirium as the outcome and described the prevalence of delirium among participants during the postoperative period. Odds ratio and 95% confidence interval were calculated to examine the association. FINDINGS Twenty cohort studies met our inclusion criteria, which included a total of 4,568 patients. We found that preoperative frailty was significantly associated with an increased risk of postoperative delirium (crude odds ratio: 3.28; 95% confidence interval: 2.51 to 4.28; I2 = 46.7%) (adjusted odds ratio: 2.45; 95% confidence interval: 1.58 to 3.81; I2 = 88.6%). CONCLUSIONS This meta-analysis showed that preoperative frailty is an independent risk factor for postoperative delirium. In patients undergoing cardiovascular surgery, there is a lower association between frailty and postoperative delirium. In patients with other types of surgery, preoperative frailty is closely related to postoperative delirium.
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Affiliation(s)
- Chang-Yuan Liu
- The Second Department of Anesthesiology, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - Ning Gong
- Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Wei Liu
- School of Nursing, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning, China.
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13
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Gong N, Jin H, Sun S, Mao S, Li W, Zhang S. A bionic soft tongue driven by shape memory alloy and pneumatics. Bioinspir Biomim 2021; 16. [PMID: 34130274 DOI: 10.1088/1748-3190/ac0b98] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 06/15/2021] [Indexed: 06/12/2023]
Abstract
Soft grippers have exhibited considerable advantages owing to their flexible deformation, compliant operation, and safe interaction with objects. The ability to grip solid and liquid objects can greatly expand the application range of the soft grippers. Dogs stick out their tongues and then curl them backward to form a ladle shape for eating food and drinking water. The large extension ratio and the ladling motion of the tongues endow dogs with flexible operations for both solids and liquids. In this work, inspired by both the extending and ladling motions of dog tongues, a bionic soft tongue with the capability of handling solid and liquid objects was designed. The bionic soft tongue was composed of a tongue base and a tongue tip, which were driven by pneumatics and shape memory alloy wires, respectively. The tongue base was capable of linearly elongating and contracting with a considerable scale, while the tongue tip could be curled into a ladle shape to grasp objects. The dynamic model of the tongue base was developed and then extended to build the model-based feedback controller for the motion control. A phase dynamic model of the tongue tip was simulated for structural optimization. With the model-based feedback controller, the bionic soft tongue could achieve a fast step response and precise position control. Experimental results showed that the bionic soft tongue could grasp different kinds of objects, including of water, rice, and gel balls. This work is expected to expand the application scope of soft grippers.
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Affiliation(s)
- Ning Gong
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, People's Republic of China
| | - Hu Jin
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, People's Republic of China
| | - Shuaishuai Sun
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, People's Republic of China
| | - Shixin Mao
- Biomimetic and Intelligent Robotics Lab (BIRL), Guangdong University of Technology, Guangzhou, Guangdong, 510006, People's Republic of China
| | - Weihua Li
- School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Shiwu Zhang
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, 230027, People's Republic of China
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Gong N, Shao K, Shen K, Gu Y, Liu Y, Ye J, Hu C, Shen L, Chen Y, Li D, Fan J. Chemical control of overwintering green algae to mitigate green tide in the Yellow Sea. Mar Pollut Bull 2021; 168:112424. [PMID: 33975157 DOI: 10.1016/j.marpolbul.2021.112424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/21/2021] [Accepted: 04/22/2021] [Indexed: 06/12/2023]
Abstract
It has been 14 years since the world's largest Ulva bloom appeared in the Yellow Sea, China in 2007. Although it is clear that the Ulva bloom originates from the culture system of Porphyra yezoensis (Nori) in the southern Yellow Sea, how to control it is still little understood. Since overwintering banks played a crucial role in the development of spring population of green algae on the cultivation ropes, here, a promising method was presented to prevent the development of Ulva bloom by the inactivation of the overwintering banks of green algae on the P. yezoensis cultivation ropes during February and early March. Chlorine dioxide, an environment-friendly disinfectant was used as algaecide with dosage of no lower than 40 mg/L at the contact time of 1 min. The overwintering green algae gradually disappeared within two weeks after the treatment. Furthermore, the growth of spring population of green algae on the cultivation ropes was effectively inhibited for at least eight weeks, which contribute to prevent the formation of floating populations during cultivation facilities collection. It was expected that the present method, if to be applied in the P. yezoensis cultivation areas in southern Yellow Sea, may mitigate the magnitude of the Ulva blooms in the Yellow Sea at a lower cost.
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Affiliation(s)
- Ning Gong
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China
| | - Kuishuang Shao
- National Marine Environmental Monitoring Center, Dalian 116023, China.
| | - Kun Shen
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China
| | - Yanbin Gu
- National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Yu'an Liu
- National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Jinqing Ye
- National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Chuanming Hu
- Jiangsu Marine Fisheries Research Institute, Nantong 226000, China
| | - Lingyu Shen
- National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Yanlong Chen
- National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Dongwei Li
- Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China
| | - Jingfeng Fan
- National Marine Environmental Monitoring Center, Dalian 116023, China
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15
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Gong N, Yao N, Lv Z, Wang S. GEPC: Global embeddings with PID control. COMPUT SPEECH LANG 2021. [DOI: 10.1016/j.csl.2021.101197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Challa V, Nune K, Gong N, Misra R. The significant impact of mechanically-induced phase transformation on cellular functionality of biomedical austenitic stainless steel. J Mech Behav Biomed Mater 2020; 108:103815. [DOI: 10.1016/j.jmbbm.2020.103815] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 04/12/2020] [Accepted: 04/20/2020] [Indexed: 01/08/2023]
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17
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Guo P, Chu Q, Gong N, Yan X, Liu B. High C2 hydrocarbons capture and selective C2/C1 separation in A Tb(III)-organic framework. J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2020.121345] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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19
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Zhong R, Liu S, Wang X, Zhang G, Gong N, Wang M, Sun Y. A real-time isothermal amplification based portable microfluidic system for simple and reliable detection of Vibrio splendidus. Anal Methods 2020; 12:2985-2994. [PMID: 32930158 DOI: 10.1039/d0ay00566e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The spread of infectious diseases among aquaculture species has a serious impact on the aquaculture industry. Simple, specific and low-cost detection methods are urgently needed for early diagnosis and timely treatment, particularly for on-site identifying and tracking of pathogens. Vibrio splendidus (V. splendidus) is regarded as one of the main pathogenic bacteria causing skin ulcerative syndrome in cultured sea cucumbers, leading to massive mortality and severe economic losses. We herein present a microfluidic-based real-time fluorogenic loop-mediated isothermal amplification (LAMP) system for simple and reliable detection of V. splendidus. A LAMP primer set with six primers (arsB1) specifically targeting the arsB gene of V. splendidus was successfully designed and tested on the portable microfluidic system for the first time. Only a single step of sample loading using a pipette is required to fill an array of reaction wells (with 10 or 18 wells) in a disposable chip for multiplex detection. A dedicated plastic shell is then utilized to tightly seal the openings of the chip by buckling to prevent contamination and evaporation. Up to four chips (one sample per chip) can be held in the stand-alone and inexpensive microdevice simultaneously, enabling on-demand detection of multiple samples in a single run. Reproducible (relatively low intra- and inter-chip variability) and sensitive (as few as ∼20 CFU, Colony-Forming Units, per reaction well) on-chip arsB1-LAMP assay was demonstrated by using diluted lysate of V. splendidus. A linear standard curve (R2 > 0.98) was attained over the template concentration range of 5 × 103 to 5 × 106 CFU mL-1. V. splendidus can be detected in samples containing different bacteria, indicating the feasibility of the portable microfluidic LAMP system for parallel detection of multiple bacterial pathogens. The proposed on-chip LAMP assay is simple to operate, reliable for amplification, flexible in detection and cost-effective in instrumentation and testing, holding great potential for on-site rapid detection and routine monitoring of aquaculture pathogens.
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Affiliation(s)
- Runtao Zhong
- Institute of Environmental Systems Biology, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
| | - Shilin Liu
- Institute of Environmental Systems Biology, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
| | - Xiaohui Wang
- Dalian University, Dalian Economic & Technical Development Zone, Dalian 116622, China
| | - Guohao Zhang
- Beijing Baicare Biotechnology Co., Ltd., Zhongguancun Life Science Park, Beijing 102206, China
| | - Ning Gong
- Institute of Environmental Systems Biology, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
| | - Mengyu Wang
- Institute of Environmental Systems Biology, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
| | - Yeqing Sun
- Institute of Environmental Systems Biology, Dalian Maritime University, 1 Linghai Road, Dalian 116026, China.
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20
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Gong N, Shao K, Che C, Sun Y. Stability of nickel oxide nanoparticles and its influence on toxicity to marine algae Chlorella vulgaris. Mar Pollut Bull 2019; 149:110532. [PMID: 31543479 DOI: 10.1016/j.marpolbul.2019.110532] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 08/19/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
This study considered the stability of nickel oxide nanoparticles (nNiO) in seawater including their ability of aggregation and ion release. Furthermore, the relationship between these properties and their toxicity on marine algae Chlorella vulgaris was investigated. The results showed nNiO inhibited the growth of algal cells and decreased their chlorophyll content, which was due to the shading effects by aggregation of nNiO in seawater. Moreover, the release of Ni2+ depended on concentration of the nNiO solution. About 1.63% Ni2+ (varied from 0.89 to 3.63%) was detected and it may mediate the generation of ROS under both visible light and ultraviolet (UV) irradiation, which resulted in oxidative stress in algae. Therefore, the stability of nNiO in water affected its toxicity, which should be considered when assessing the nano-pollution risks in aquatic ecosystem.
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Affiliation(s)
- Ning Gong
- Institute of Environmental Systems Biology, Dalian Maritime University, 1 Linghai Road, Dalian, 116026, PR China; College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, PR China.
| | - Kuishuang Shao
- National Marine Environmental Monitoring Center, China, 42 Linghe Road, Dalian, 116023, PR China.
| | - Cheng Che
- Institute of Environmental Systems Biology, Dalian Maritime University, 1 Linghai Road, Dalian, 116026, PR China; College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, PR China
| | - Yeqing Sun
- Institute of Environmental Systems Biology, Dalian Maritime University, 1 Linghai Road, Dalian, 116026, PR China; College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, PR China
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21
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Duan L, Su J, Gong N, Wan B, Chen P, Zhou P, Wang Z, Li Z, Wu L. Pressure induced semiconductor-semimetal-superconductor transition of magnesium hexaborides. Dalton Trans 2019; 48:14299-14305. [PMID: 31453996 DOI: 10.1039/c9dt02813g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A thorough structural exploration was performed for MgB6 combining the global structure searching method with first-principles calculations. Besides the known Cmcm phase, new phases, i.e. I4/mmm, C2/m-I, C2/m-II and P21/m, were predicted to be stable in the pressure range of 18-100 GPa. Unexpectedly, Cmcm-MgB6 was found to be a semiconductor with an indirect band gap of 0.38 eV with the HSE06 functional, in good agreement with the experimental finding. I4/mmm-MgB6 stabilized above 18 GPa exhibits semimetallic behaviour with a topological node-line near the Fermi level. Consequently, C2/m-I MgB6 with a sandwich structure similar to MgB2 is predicted to be a superconductor with a critical temperature (Tc) of 9.5 K. By analysing the electronic structure, the intriguing semiconductor-semimetal-superconductor transition may be ascribed to the delocalization of more B-p electrons in the boron sublattice. The novel functions uncovered for MgB6 may inspire more efforts to discover materials with intriguing properties.
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Affiliation(s)
- Li Duan
- State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China.
| | - Jing Su
- State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China.
| | - Ning Gong
- State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China.
| | - Biao Wan
- State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China.
| | - Peng Chen
- State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China.
| | - Pengyuan Zhou
- State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China.
| | - Zhibin Wang
- Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China
| | - Zhiping Li
- Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China
| | - Lailei Wu
- State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China. and Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China
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22
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Wang W, Gong N, Yin H, Zhang B, Guo P, Liu B, Wang YY. Two Stable Terbium–Organic Frameworks Based on Predesigned Functionalized Ligands: Selective Sensing of Fe3+ Ions and C2H2/CH4 Separation. Inorg Chem 2019; 58:10295-10303. [DOI: 10.1021/acs.inorgchem.9b01465] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Weize Wang
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, P. R. China
| | - Ning Gong
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, P. R. China
| | - Hong Yin
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, P. R. China
| | - Bin Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi’an 710069, P. R. China
| | - Panyue Guo
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, P. R. China
| | - Bo Liu
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling, 712100, P. R. China
| | - Yao-Yu Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi’an 710069, P. R. China
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23
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Qiu B, Gong N, Li Q, Xie C, Liu H. P3.17-08 Assessing Primary Lung Cancer Lesion Using Ratio Metrics of T1 and T2-Weighted Images in Magnetic Resonance Imaging. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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24
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Li Q, Gong N, Qiu B, He H, Wang J, Ye Y, Guo J, Lin S, Cai P, Chen Q, Li H, Xie C, Liu H. P1.16-40 Evaluating the Tumor Heterogeneity in Lung Cancer by Constructing Tumor Heterogeneity Index (THI) from Magnetic Resonance Imaging. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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25
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Gong N, Liu Y, Huang R. Simultaneous adsorption of Cu2+ and Acid fuchsin (AF) from aqueous solutions by CMC/bentonite composite. Int J Biol Macromol 2018; 115:580-589. [DOI: 10.1016/j.ijbiomac.2018.04.075] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 03/29/2018] [Accepted: 04/11/2018] [Indexed: 01/11/2023]
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26
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Gong N, Shao K, Han X, Zhang Y, Sun Y. Enrichment and physiological responses of dechlorane plus on juvenile marine macroalgae (Ulva pertusa). Chemosphere 2018; 205:594-600. [PMID: 29709809 DOI: 10.1016/j.chemosphere.2018.04.137] [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] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 04/20/2018] [Accepted: 04/21/2018] [Indexed: 06/08/2023]
Abstract
Dechlorane Plus (DP), a chlorinated flame retardant, is increasingly reported in aquatic ecosystems worldwide. But little information is available regarding the toxicity of DP in marine organisms, especially in macroalgae. The objective of this study was to investigate effects of DP exposure on photosynthesis, oxidative stress and its enrichment in juvenile marine macroalgae (Ulva pertusa). Following 21- day uptake and 21- day depuration (10-8 mol/L), algae accumulated 1.18 times of DP compared to the initial concentration. Anti-DP was prone to accumulate in juvenile macroalgae. The enrichment of DP affected the physiological responses in algae. After 1, 7 and 14 days DP exposure (10-8, 10-7 and 10-6 mol/L), antioxidant enzymes (SOD and CAT) activities and MDA content changed in a dose and time depended manner. Chlorophyll fluorescence parameters, including Fv/Fm, ΦPSII and ETR decreased with the increasing DP concentration. It indicated that DP leads to a low rate of light energy utilization in algae which may ascribe to the oxidative damage induced by DP enrichment. Present study provides insight into the toxicological effects of DP on marine macroalgae, which is useful for risk assessment of DP in intertidal zone ecosystems.
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Affiliation(s)
- Ning Gong
- Institute of Environmental Systems Biology, Dalian Maritime University, Dalian 116026, China; College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China.
| | - Kuishuang Shao
- National Marine Environmental Monitoring Center, Dalian 116023, China
| | - Xu Han
- Institute of Environmental Systems Biology, Dalian Maritime University, Dalian 116026, China; College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China
| | - Yukun Zhang
- Institute of Environmental Systems Biology, Dalian Maritime University, Dalian 116026, China; College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China
| | - Yeqing Sun
- Institute of Environmental Systems Biology, Dalian Maritime University, Dalian 116026, China; College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China.
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27
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Gong N, Deng C, Wu L, Wan B, Wang Z, Li Z, Gou H, Gao F. Structural Diversity and Electronic Properties of 3d Transition Metal Tetraphosphides, TMP4 (TM = V, Cr, Mn, and Fe). Inorg Chem 2018; 57:9385-9392. [PMID: 30024155 DOI: 10.1021/acs.inorgchem.8b01380] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Ning Gong
- State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Chunxing Deng
- State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Lailei Wu
- State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, China
- Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Biao Wan
- State Key Laboratory of Metastable Materials Science and Technology, College of Material Science and Engineering, Yanshan University, Qinhuangdao 066004, China
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China
| | - Zhibin Wang
- Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Zhiping Li
- Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Huiyang Gou
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China
- Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Faming Gao
- Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
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28
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Gong N, Idé T, Kim S, Boybat I, Sebastian A, Narayanan V, Ando T. Signal and noise extraction from analog memory elements for neuromorphic computing. Nat Commun 2018; 9:2102. [PMID: 29844421 PMCID: PMC5974407 DOI: 10.1038/s41467-018-04485-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 05/01/2018] [Indexed: 11/09/2022] Open
Abstract
Dense crossbar arrays of non-volatile memory (NVM) can potentially enable massively parallel and highly energy-efficient neuromorphic computing systems. The key requirements for the NVM elements are continuous (analog-like) conductance tuning capability and switching symmetry with acceptable noise levels. However, most NVM devices show non-linear and asymmetric switching behaviors. Such non-linear behaviors render separation of signal and noise extremely difficult with conventional characterization techniques. In this study, we establish a practical methodology based on Gaussian process regression to address this issue. The methodology is agnostic to switching mechanisms and applicable to various NVM devices. We show tradeoff between switching symmetry and signal-to-noise ratio for HfO2-based resistive random access memory. Then, we characterize 1000 phase-change memory devices based on Ge2Sb2Te5 and separate total variability into device-to-device variability and inherent randomness from individual devices. These results highlight the usefulness of our methodology to realize ideal NVM devices for neuromorphic computing.
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Affiliation(s)
- N Gong
- IBM T. J. Watson Research Center, 1101 Kitchawan Road, Yorktown Heights, NY, 10598, USA.,Department of Electrical Engineering, Yale University, 10 Hillhouse Avenue, New Haven, CT, 06511, USA
| | - T Idé
- IBM T. J. Watson Research Center, 1101 Kitchawan Road, Yorktown Heights, NY, 10598, USA
| | - S Kim
- IBM T. J. Watson Research Center, 1101 Kitchawan Road, Yorktown Heights, NY, 10598, USA
| | - I Boybat
- IBM Research-Zurich, Säumerstrasse 4, 8803, Rüschlikon, Switzerland.,Ecole Polytechnique Federale de Lausanne (EPFL), Route Cantonale, 1015, Lausanne, Switzerland
| | - A Sebastian
- IBM Research-Zurich, Säumerstrasse 4, 8803, Rüschlikon, Switzerland
| | - V Narayanan
- IBM T. J. Watson Research Center, 1101 Kitchawan Road, Yorktown Heights, NY, 10598, USA
| | - T Ando
- IBM T. J. Watson Research Center, 1101 Kitchawan Road, Yorktown Heights, NY, 10598, USA.
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Damen A, Heyenbruch D, Gong N, Maurer K, Grimley M, Nelson A, Davies S, Lutzko C, Zhu X, Bollard C, Hanley P, Leemhuis T. Production of quadrivalent virus-specific t cells utilizing peptide stimulation. Cytotherapy 2018. [DOI: 10.1016/j.jcyt.2018.02.292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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30
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Wang F, Wang M, Liu Z, Shi Y, Han T, Ye Y, Gong N, Sun J, Zhu C. Different responses of low grain-Cd-accumulating and high grain-Cd-accumulating rice cultivars to Cd stress. Plant Physiol Biochem 2015; 96:261-9. [PMID: 26318143 DOI: 10.1016/j.plaphy.2015.08.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 08/03/2015] [Accepted: 08/03/2015] [Indexed: 05/01/2023]
Abstract
Cadmium (Cd) is a major heavy metal pollutant which is highly toxic to plants and animals. The accumulation of Cd in rice grains is a major agricultural problem in regions with Cd pollution. A hydroponics experiment using low grain-Cd-accumulating rice (xiushui 11) and high grain-Cd-accumulating rice (xiushui 110) was carried out to characterize the different responses of rice cultivars to Cd stress. We found that xiushui 11 was more tolerant to Cd than xiushui 110, and xiushui 11 suffered less oxidative damage. Cell walls played an important role in limiting the amount of Cd that entered the protoplast, especially in xiushui 11. Cd stored in organelles as soluble fractions, leading to greater physiological stress of Cd detoxification. We found that Cd can disturb the ion homeostasis in rice roots because Cd(2+) and Ca(2+) may have a similar uptake route. Xiushui 11 had a faster root-to-shoot transport of Cd, and the expression level of OsPCR1 gene which was predicted related with Cd accumulation in rice was consist with the Cd transport of root-to-shoot in rice and maintain the greater Cd tolerance of xiushui 11. These results suggest there are different Cd detoxification and accumulation mechanisms in rice cultivars.
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Affiliation(s)
- Feijuan Wang
- College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China.
| | - Min Wang
- College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China
| | - Zhouping Liu
- College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China
| | - Yan Shi
- College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China
| | - Tiqian Han
- College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China
| | - Yaoyao Ye
- College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China
| | - Ning Gong
- Yiwu Product and Commodity Quality Supervision and Inspection Institute, China
| | - Junwei Sun
- College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China
| | - Cheng Zhu
- College of Life Sciences, China Jiliang University, Xueyuan Road 258, Hangzhou 310018, China.
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31
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Zou Y, Gong N, Cui Y, Wang X, Cui A, Chen Q, Jiao T, Dong X, Yang H, Zhang S, Fang F, Chang Y. Forkhead Box P1 (FOXP1) Transcription Factor Regulates Hepatic Glucose Homeostasis. J Biol Chem 2015; 290:30607-15. [PMID: 26504089 DOI: 10.1074/jbc.m115.681627] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Indexed: 11/06/2022] Open
Abstract
Dysregulation of hepatic gluconeogenesis contributes to the pathogenesis of diabetes, yet the detailed molecular mechanisms remain to be fully elucidated. Here we show that FOXP1, a transcriptional repressor, plays a key role in the regulation of systemic glucose homeostasis. Hepatic expression levels of FOXP1 are decreased in diabetic mice. Modest hepatic overexpression of FOXP1 in mice inhibited the expression of gluconeogenic genes, such as peroxisome proliferators-activated receptor γ coactivator-1α (PGC-1α), phosphoenolpyruvate carboxykinase (PEPCK), and glucose-6-phosphatase (G6PC), leading to a decrease in hepatic glucose production and fasting blood glucose levels in normal mice and different mouse models of diabetes, including db/db diabetic and high-fat diet-induced obese mice. FOXP1 physically interacted with FOXO1 in vivo and competed with FOXO1 for binding to the insulin response element in the promoter region of gluconeogenic genes, thereby interfering expression of these genes. These results identify a previously unrecognized role for FOXP1 in the transcriptional control of hepatic glucose homeostasis.
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Affiliation(s)
- Yongkang Zou
- From the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China and
| | - Ning Gong
- From the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China and
| | - Ying Cui
- From the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China and
| | - Xiaojuan Wang
- From the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China and
| | - Anfang Cui
- From the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China and
| | - Qi Chen
- From the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China and
| | - Tao Jiao
- From the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China and
| | - Xueyu Dong
- From the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China and
| | - Hao Yang
- From the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China and
| | - Shutian Zhang
- the Beijing Friendship Hospital Affiliated to the Capital Medical University, Beijing Key Laboratory for Precancerous Lesion of Digestive Diseases, Beijing Digestive Disease Center, Beijing, China
| | - Fude Fang
- From the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China and
| | - Yongsheng Chang
- From the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China and
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Xie J, Jin B, Li DW, Shen B, Gong N, Zhang TZ, Dong P. Effect of laminin-binding BDNF on induction of recurrent laryngeal nerve regeneration by miR-222 activation of mTOR signal pathway. Am J Transl Res 2015; 7:1071-1080. [PMID: 26279751 PMCID: PMC4532740] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 02/20/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND AND AIM Recurrent laryngeal nerve injury is a common severe complication in neck surgery, which can cause varying degrees of vocal fold paralysis and respiratory tract problems. In present study, the effects of laminin-binding brain derived neurotrophic factor (LBD-BDNF) on recurrent laryngeal nerve regeneration were explored and its possible mechanism was investigated. METHODS LBD-BDNF or NAT-BDNF (BDNF without LBD binding) treatment was performed in laryngeal nerve injured rabbits for sixteen weeks. The laryngeal nerve was removed, and histological examination as well as laryngeal electromyography was employed to evaluate its morphology and function of conduction. PC12 cells were cultured to investigate the mechanisms underlying the effects of LBD-BDNF. Neurite outgrowth, proliferation and migration were determined in nerve cells. The expression of miRNAs and protein of mTOR was quantified by real-time PCR and western blotting respectively. RESULTS In vivo experiments, LBD-BDNF significantly improved the histological structure and function of recurrent laryngeal nerve compared with NAT-BDNF. LBD-BDNF also markedly promoted neurite outgrowth, proliferation and migration in PC12 cells in vitro experiments. The levels of miR-222 and p-mTOR were up-regulated by LBD-BDNF treatment in both in vivo and in vitro experiments. miR-222 inhibitor attenuated the expression of phosphorylated mTOR and miR-222 mimic enhanced its expression in PC12 cells. In addition, the improved nerve conduction by LBD-BDNF was canceled by miR-222 inhibitor, and the mTOR inhibitor reversed the effects of miR-222 inhibitor on LBD-BDNF treated cells. CONCLUSIONS The present study revealed that LBD-BDNF promoted the recurrent laryngeal nerve regeneration in laryngeal nerve injured rabbits. The underlying mechanism was closely related to activation of p-mTOR by miR-222.
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Affiliation(s)
- Jin Xie
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated First People’s HospitalShanghai 200080
| | - Bin Jin
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated First People’s HospitalShanghai 200080
| | - Da-Wei Li
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233
| | - Bin Shen
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated First People’s HospitalShanghai 200080
| | - Ning Gong
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated First People’s HospitalShanghai 200080
| | - Tian-Zhen Zhang
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated First People’s HospitalShanghai 200080
| | - Pin Dong
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated First People’s HospitalShanghai 200080
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Gong N, Wu J, Liang Z, Jiang W, Wang X. Role of salubrinal in protecting cardiomyocytes from doxorubicin-induced apoptosis. Genet Mol Res 2015; 14:12377-85. [DOI: 10.4238/2015.october.16.4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Einarsdóttir IE, Gong N, Jönsson E, Sundh H, Hasselberg-Frank L, Nilsen TO, Stefansson SO, Sundell K, Björnsson BT. Plasma growth hormone-binding protein levels in Atlantic salmon Salmo salar during smoltification and seawater transfer. J Fish Biol 2014; 85:1279-1296. [PMID: 25159100 DOI: 10.1111/jfb.12473] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 06/11/2014] [Indexed: 06/03/2023]
Abstract
Specific growth hormone (GH)-binding protein (Ghbp) was purified from Atlantic salmon Salmo salar and rainbow trout Oncorhynchus mykiss plasma with immunoprecipitation and characterized in cross-linking studies using autoradiography and western blots. The size of the Ghbp was estimated to be c. 53 kDa. A radioimmunoassay was established to measure Ghbp in salmonids, using antibodies specific against the extracellular segment of the S. salar growth hormone receptor 1 (grh1; GenBank AY462105). Plasma Ghbp levels were measured in S. salar smolts in fresh water and after transfer to seawater (SW; experiments 1 and 2), and in post-smolts kept at different salinities (0, 12, 22 and 34) for 3 months (experiment 3). A transient increase in plasma Ghbp, which lasted for 1 month or less, was noted in smolts after transfer to SW. Concomitantly, plasma GH and gill Na(+) -K(+) -ATPase activity increased during smoltification (in experiment 2). No difference in plasma Ghbp was evident between post-smolts kept at different salinities, although the fish kept at salinity 34 had higher plasma GH than the group kept at salinity 22 and higher hepatic ghr1 expression than post-smolts kept at salinity 12. This suggests that plasma Ghbp regulation may respond to salinity changes in the short term. The lack of correlation between Ghbp, plasma GH and hepatic ghr1 expression in the long-term post-smolt experiment indicates that Ghbp levels may be regulated independently of other components of the endocrine GH system in salmonids.
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Affiliation(s)
- I E Einarsdóttir
- University of Gothenburg, Department of Biological and Environmental Sciences, Medicinaregatan 18, 413 90, Gothenburg, Sweden
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Zhao L, Gong N, Mi D, Luan C, Shao K, Jia H, Sun Y. Kinetics of stereoselective enrichment of Dechlorane Plus in Ulva Pertusa. Chemosphere 2014; 111:580-586. [PMID: 24997969 DOI: 10.1016/j.chemosphere.2014.04.099] [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] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 04/09/2014] [Accepted: 04/28/2014] [Indexed: 06/03/2023]
Abstract
Dechlorane Plus (DP) has been detected extensively in both biotic and abiotic matrices, and stereoselective enrichment of Dechlorane Plus isomers has also been observed in organisms. In this laboratory study, Ulva pertusa were firstly exposed to known Dechlorane Plus concentrations for 21d (uptake period), and then transferred to clean seawater for 14d (depuration period) to investigate the kinetics of Dechlorane Plus isomers in U. pertusa. Dechlorane Plus isomers reached steady-state after 21d of exposure. The mean fractional abundance of syn-DP (fsyn) exceeded than that of 0d (0.23±0.02) during uptake, but decreased during depuration. This study is the first to define the kinetics of stereoselective enrichment of Dechlorane Plus isomers in U. pertusa using two-box kinetic model. The uptake rate constants of the syn- and anti-DP were 0.164±0.056d(-1) and 0.083±0.071d(-1), respectively. The depuration rate constants were 0.337±0.057d(-1) (syn-DP) and 0.236±0.095d(-1) (anti-DP), suggesting that syn-DP is eliminated quicker than anti-DP by U. pertusa. These results are consistent with observation of fsyn and stereoselective enrichment of Dechlorane Plus isomers in U. pertusa.
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Affiliation(s)
- Lei Zhao
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, Liaoning, PR China; Institute of Environmental Systems Biology, Dalian Maritime University, Dalian, Liaoning, PR China
| | - Ning Gong
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, Liaoning, PR China; Institute of Environmental Systems Biology, Dalian Maritime University, Dalian, Liaoning, PR China
| | - Dong Mi
- Department of Physics, Dalian Maritime University, Dalian, Liaoning, PR China.
| | - Chundi Luan
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, Liaoning, PR China; Institute of Environmental Systems Biology, Dalian Maritime University, Dalian, Liaoning, PR China
| | - Kuishuang Shao
- National Marine Environmental Monitoring Center, Dalian, Liaoning, PR China
| | - Hongliang Jia
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, Liaoning, PR China; International Joint Research Center for Persistent Toxic Substances, Dalian Maritime University, Dalian, Liaoning, PR China
| | - Yeqing Sun
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, Liaoning, PR China; Institute of Environmental Systems Biology, Dalian Maritime University, Dalian, Liaoning, PR China.
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Chang E, Chen X, Kim M, Gong N, Bhatia S, Luo ZD. Differential effects of voltage-gated calcium channel blockers on calcium channel alpha-2-delta-1 subunit protein-mediated nociception. Eur J Pain 2014; 19:639-48. [PMID: 25158907 DOI: 10.1002/ejp.585] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/16/2014] [Indexed: 11/09/2022]
Abstract
BACKGROUND Overexpression of the voltage-gated calcium channel (VGCC) alpha-2-delta1 subunit protein (Cav α2 δ1 ) has been shown to cause pain states. However, whether VGCC are involved in pain states driven by abnormal Cav α2 δ1 expression is not known. METHODS Intrathecal injection of N-, P/Q- and L-type VGCC blockers were tested in two models: a transgenic neuronal Cav α2 δ1 overexpression (TG) model with behavioural hypersensitivity and a spinal nerve ligation (SNL) model with Cav α2 δ1 overexpression in sensory pathways and neuropathy pain states. RESULTS The nociceptive response to mechanical stimuli was significantly attenuated in both models with ω-conotoxin GVIA (an N-type VGCC blocker) and nifedipine (an L-type VGCC blocker), in which ω-conotoxin GVIA appeared more potent than nifedipine. Treatments with ω-agatoxin IVA (P-VGCC blocker), but not ω-conotoxin MVIIC (Q-VGCC blocker) had similar potency in the TG model as the N-type VGCC blocker, while both ω-agatoxin IVA and ω-conotoxin MVIIC had minimal effects in the SNL model compared with controls. CONCLUSION These findings suggest that, at the spinal level, N- and L-type VGCC are likely involved in behavioural hypersensitivity states driven by Cav α2 δ1 overexpression. Q-type VGCC has minimal effects in both models. The anti-nociceptive effects of P-type VGCC blocker in the Cav α2 δ1 TG mice, but minimally at the SNL model with presynaptic Cav α2 δ1 up-regulation, suggest that its potential action site(s) is at the post-synaptic and/or supraspinal level. These findings support that N-, L- and P/Q-type VGCC have differential contributions to behavioural hypersensitivity modulated by Cav α2 δ1 dysregulation at the spinal cord level.
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Affiliation(s)
- E Chang
- Department of Anesthesiology and Perioperative Care, University of California Irvine, Irvine, USA; Department of Physical Medicine and Rehabilitation, University of California Irvine, Irvine, USA; Reeve-Irvine Research Center for Spinal Cord Injury, University of California Irvine, Irvine, USA
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Ye JJ, Ma L, Yang LJ, Wang JH, Wang YL, Guo H, Gong N, Nie WH, Zhao SH. Partial AZFc duplications not deletions are associated with male infertility in the Yi population of Yunnan Province, China. J Zhejiang Univ Sci B 2014; 14:807-15. [PMID: 24009201 DOI: 10.1631/jzus.b1200301] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE There are many reports on associations between spermatogenesis and partial azoospermia factor c (AZFc) deletions as well as duplications; however, results are conflicting, possibly due to differences in methodology and ethnic background. The purpose of this study is to investigate the association of AZFc polymorphisms and male infertility in the Yi ethnic population, residents within Yunnan Province, China. METHODS A total of 224 infertile patients and 153 fertile subjects were selected in the Yi ethnic population. The study was performed by sequence-tagged site plus/minus (STS+/-) analysis followed by gene dosage and gene copy definition analysis. Y haplotypes of 215 cases and 115 controls were defined by 12 binary markers using single nucleotide polymorphism on Y chromosome (Y-SNP) multiplex assays based on single base primer extension technology. RESULTS The distribution of Y haplotypes was not significantly different between the case and control groups. The frequencies of both gr/gr (7.6% vs. 8.5%) and b2/b3 (6.3% vs. 8.5%) deletions do not show significant differences. Similarly, single nucleotide variant (SNV) analysis shows no significant difference of gene copy definition between the cases and controls. However, the frequency of partial duplications in the infertile group (4.0%) is significantly higher than that in the control group (0.7%). Further, we found a case with sY1206 deletion which had two CDY1 copies but removed half of DAZ genes. CONCLUSIONS Our results show that male infertility is associated with partial AZFc duplications, but neither gr/gr nor b2/b3 deletions, suggesting that partial AZFc duplications rather than deletions are risk factors for male infertility in Chinese-Yi population.
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Affiliation(s)
- Jun-jie Ye
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China; Yunnan Key Laboratory of Fertility Regulation and Minority Eugenics, Yunnan Population and Family Planning Research Institute, Kunming 650021, China; Department of Urology, Kunming General Hospital of Chengdu Military Command, Kunming 650032, China; Haiyuan College, Kunming Medical University, Kunming 650021, China
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Zhang H, Chen Q, Yang M, Zhu B, Cui Y, Xue Y, Gong N, Cui A, Wang M, Shen L, Zhang S, Fang F, Chang Y. Mouse KLF11 regulates hepatic lipid metabolism. J Hepatol 2013. [PMID: 23183531 DOI: 10.1016/j.jhep.2012.11.024] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND & AIMS Missense mutations in human Krüppel-like factor 11 (KLF11) lead to the development of diabetes, as a result of impaired insulin synthesis in the pancreas. However, the role of KLF11 in peripheral tissues is largely unknown. The aim of this study is to evaluate the role of KLF11 in the regulation of hepatic lipid homeostasis using different mouse models. METHODS Adenoviruses expressing KLF11 (Ad-KLF11) or KLF11-specific shRNA (Ad-shKLF11) were injected into db/db diabetic, high-fat diet-induced obese (DIO), or normal C57BL/6J mice. Histological analysis of the fatty liver phenotype and biochemical analysis of hepatic and serum TG levels in these mice were performed. The molecular mechanism by which KLF11 regulates lipid metabolism in primary hepatocytes and mouse livers was explored. RESULTS The expression of the transcription factor KLF11 gene is dysregulated in the livers of db/db and DIO mice. Adenovirus-mediated overexpression of KLF11 in the livers of db/db and DIO mice activates the PPARα signaling pathway, subsequently markedly improving the fatty liver phenotype. Conversely, knockdown of KLF11, by adenovirus (Ad-shKLF11) in livers of wild type C57BL/6J and db/m mice, increases hepatic triglyceride (TG) levels, owing to decreased fatty acid oxidation. Finally, the treatment of diabetic mice with Ad-shPPARα abolishes KLF11 stimulatory effects on the expression of genes involved in fatty acid oxidation and inhibitory effects on hepatic TG content. In contrast, PPARα rescue restores the increased hepatic TG levels in Ad-shKLF11-infected db/m mice to normal levels. CONCLUSIONS KLF11 is an important regulator of hepatic lipid metabolism.
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Affiliation(s)
- Huabing Zhang
- National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Zhao B, Li X, Dai X, Gong N. Adenovirus-mediated anti-sense extracellular signal-regulated kinase 2 gene therapy inhibits activation of vascular smooth muscle cells and angiogenesis, and ameliorates transplant arteriosclerosis. Transplant Proc 2013; 45:639-42. [PMID: 23498803 DOI: 10.1016/j.transproceed.2012.04.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 03/16/2012] [Accepted: 04/17/2012] [Indexed: 11/24/2022]
Abstract
UNLABELLED The aim of this study was to explore underlying mechanisms of transplant arteriosclerosis (TA) based on intimal thickening that involve activation of vascular smooth muscle cells (VSMCs) and angiogenesis. We also examined the effects of adenovirus-mediated anti-sense extracellular signal-regulated kinase 2 (ERK2) (Adanti-ERK2) gene therapy on TA. METHODS We employed a rat aorta transplantation model (Brown-Norway → Lewis). The animals were divided into: (1) an isograft group (n = 6), (2) an empty control group (n = 6), (3) the Ad-LacZ group (n = 6), and (4) the adanti-ERK2 group (n = 6). At 60 days after transplantation, we documented the ratio of intima/(intima + media) the isografts pathologically. Staining for α-actin and platelet-derived growth factor (PDGF)-BB was performed to analyze the migration and secretion of VSMCs. We evaluated angiogenesis and COX-2 staining. RESULT Isografts showed normal histology; allografts from the empty control group and the Ad-LacZ group displayed typical TA lesions, while the pathology was significantly improved among the adanti-ERK2 group. The ratios of intima/(intima + media) were 7.6 ± 2.1%, 81.4% ± 6.7%, 85.9% ± 9.4%, and 15.9% ± 4.1% among the isograft group, the empty control, the Ad-LacZ, and the adanti-ERK2 groups respectively. The α-actin+ cells in the intima per field (×400) were 2.1 ± 1.1, 71.3 ± 9.2, 76.4 ± 11.3, and 34.8 ± 5.3, PDGF-BB+ cells, 0.9 ± 0.5, 28.4 ± 3.4, 29.1 ± 3.2, and 8.6 ± 1.7; COX-2+ cells in new capillaries were none, 36.3 ± 8.3, 40.9 ± 9.2, and 10.4 ± 3.9 respectively (P < .05). CONCLUSION Intimal thickening a key feature of TA, involves activation of VSMC (proliferation, migration and secretion), and the accompanying angiogenesis. Adanti-ERK2 gene therapy modulates the mechanisms, protecting allografts against TA.
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Affiliation(s)
- B Zhao
- Department of Thoracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation of the Ministry of Education, MOE, and Ministry of Health, MOH, Wuhan, China
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Wang S, Fang Z, Huang X, Luo X, Fang Z, Gong N, Ming C. The soluble tachyzoite antigen of Toxoplasma gondii has a protective effect on mouse allografts. Transplant Proc 2012; 45:677-83. [PMID: 23267786 DOI: 10.1016/j.transproceed.2012.02.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Accepted: 02/28/2012] [Indexed: 11/19/2022]
Abstract
BACKGROUND Infection with some types of parasites can significantly prolong allograft survival in mice. It is unknown whether the soluble tachyzoite antigen (STAg) from Toxoplasma gondii has the same effect and by what mechanism it acts. METHODS A mouse model of cardiac and skin allograft transplantation was established between BALB/c (H-2(d)) and C57BL/6(H-2(b)) mice. T gondii STAg was prepared, and 5 μg was administered subcutaneously to recipient mice 4 days before transplantation. The graft status was checked daily, and histologic and immunohistochemical assays were used to evaluate rejection. The serum cytokine levels from the recipient mice were analyzed by Luminex. RESULT The administration of 5 μg STAg 4 days before transplantation significantly prolonged the survival time of the heart and skin allografts to 85.17 ± 14.06 and 24.17 ± 2.32 days, respectively. Immunohistochemical staining showed that the CD4(+) and CD8(+) T lymphocytes were markedly reduced in the allografts at day 7 posttransplantation. Notably, interleukin (IL)-12, IL-2, and IL-17 levels were significantly reduced in the serum of mice treated with STAg compared with untreated mice 7 days after transplantation. In contrast, the levels of the antiinflammatory cytokine IL-10 were elevated. CONCLUSION A single administration of STAg before transplantation can significantly prolong the allograft survival time, which is accompanied by impaired lymphocyte infiltration and a reduced Th1 response.
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Affiliation(s)
- S Wang
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Ministry of Health, Key Laboratory of Ministry of Education, Wuhan, China
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Liu YP, Gao GR, Gong N, Huang RH. [Infrared spectrum denoising with combination of lifting wavelet domain thresholding and median filtering]. Guang Pu Xue Yu Guang Pu Fen Xi 2012; 32:2085-2088. [PMID: 23156757] [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: 06/01/2023]
Abstract
Infrared spectra are often corrupted by noise, which may greatly influence the accuracy and precision of the analytical result. To improve the analytical precision, the authors need to denoise the spectrum data first. In the present paper, a spectrum denoising method by the second generation wavelet transform domain thresholding combined with the median filtering is introduced. The spectrum of a certain kind of wheat was used to test the performance of the proposed denoising method. In the experiment,noise with signal to noise ratio 21.17 dB was first added to the spectrum, and then removed by the proposed denoising method. The signal to noise ratio (SNR), the root mean square error (RMSE), the average relative error of the peak value (AREPV) and the average error of the peak position (AEPP) were used to evaluate the performance of the proposed denoising method. Experimental results show that the proposed method can remove the spectrum noise and keep the useful information more effective than Donoho's soft and hard threshold method. At the same time, it can achieve a higher PSNR, a lower RMSE, a lower AREPV and a lower AEPP than the other two denoising methods.
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Affiliation(s)
- Yan-ping Liu
- College of Science, Northwest A & F University, Yangling 712100, China.
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Song Y, Yang J, Shi X, Jiang H, Wu Y, Peng R, Wang Q, Gong N, Pan X, Sun Y, Li D. DC dielectrophoresis separation of marine algae and particles in a microfluidic chip. Sci China Chem 2012. [DOI: 10.1007/s11426-012-4533-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Gong N, Zhang HB, Fang FD, Chang YS. [Adenovirus construction of expression and its function of connective tissue growth factor]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2011; 33:649-653. [PMID: 22509549] [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: 05/31/2023]
Abstract
OBJECTIVE To construct and identify a adenovirus vector of the expression of connective tissue growth factor (CTGF) and to explore the role of CTGF in the metabolism of glucose and lipid. METHODS The over-expressed plasmid of CTGF was cloned, and then the CTGF sequences were cloned into pAdTrack-CMW vector. The reformed E. coli BJ5183-sensitive bacteria that contain pAdEasy-1 were transformed with lined vector cut by Pme I enzyme. The recombinant adenovirus vector was cut with Pac I enzyme and obtained, then transfected 293A cells to produce virus. Through three times of amplification, the adenovirus infected the primary hepatocytes to determine the infection efficiency and CTGF expression. The mice were starved for several time periods, and then the liver RNA was extracted for real-time PCR to detect the expressions of CTGF under different nutritional conditions. RESULTS The adenovirus of CTGF was successfully produced with an infection efficiency of 90%. The expressions of the CTGF were different under different nutritional conditions and showed a coincidence with the expression of peroxisome proliferators-activated receptor gamma coactivator 1 alpha. After the mice were starved for 24h, the expression of CTGF increased by (2.38 +/- 0.51) folds; after the mice were starved for 48 h, the expression of CTGF increased by (2.95 +/- 0.57) folds (P < 0.05). CONCLUSION CTGF is speculated to be involved in the metabolism of glucose and lipids.
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Affiliation(s)
- Ning Gong
- National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, CAMS and PUMC, Beijing 100005, China
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Gong N, Shao K, Feng W, Lin Z, Liang C, Sun Y. Biotoxicity of nickel oxide nanoparticles and bio-remediation by microalgae Chlorella vulgaris. Chemosphere 2011; 83:510-6. [PMID: 21216429 DOI: 10.1016/j.chemosphere.2010.12.059] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Revised: 12/07/2010] [Accepted: 12/13/2010] [Indexed: 05/14/2023]
Abstract
Adverse effects of manufactured nickel oxide nanoparticles on the microalgae Chlorellavulgaris were determined by algal growth-inhibition test and morphological observation via transmission electron microscopy (TEM). Results showed that the NiO nanoparticles had severe impacts on the algae, with 72 h EC(50) values of 32.28 mg NiOL(-1). Under the stress of NiO nanoparticles, C. vulgaris cells showed plasmolysis, cytomembrane breakage and thylakoids disorder. NiO nanoparticles aggregated and deposited in algal culture media. The presence of algal cells accelerated aggregation of nanoparticles. Moreover, about 0.14% ionic Ni was released when NiO NPs were added into seawater. The attachment of aggregates to algal cell surface and the presence of released ionic Ni were likely responsible for the toxic effects. Interestingly, some NiO nanoparticles were reduced to zero valence nickel as determined by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. The maximum ratios of nickel reduction was achieved at 72 h of exposure, in accordance with the time-course of changes in soluble protein content of treated C. vulgaris, implying that some proteins of algae are involved in the process. Our results indicate that the toxicity and bioavailability of NiO nanoparticles to marine algae are reduced by aggregation and reduction of NiO. Thus, marine algae have the potential for usage in nano-pollution bio-remediation in aquatic system.
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Affiliation(s)
- Ning Gong
- Institute of Environmental Systems Biology, Dalian Maritime University, 1 Linghai Road, Dalian 116026, PR China.
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Pan X, Gong N, Zhao J, Yu Z, Gu F, Chen J, Sun X, Zhao L, Yu M, Xu Z, Dong W, Qin Y, Fei G, Zhong C, Xu TL. Powerful beneficial effects of benfotiamine on cognitive impairment and -amyloid deposition in amyloid precursor protein/presenilin-1 transgenic mice. Brain 2010; 133:1342-51. [DOI: 10.1093/brain/awq069] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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Meng ZF, Gong N, Li RH, Zhang ZQ, Zhang YP. [Ionic exchange modification mechanism between organic modifier and Lou soil]. Huan Jing Ke Xue 2008; 29:1412-1417. [PMID: 18624216] [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: 05/26/2023]
Abstract
The ionic exchange modification mechanism between cationic organic modifier, cetyltrimethylammonium bromide (CTMAB), and two layers of Lou soil, tillage layer (TLLS) and clay layer (CLLS), were studied. The results show that a simple and effective index, sum of amounts of CTMAB and Ca2+/2 (Scc), can be used to judge the essence of modification mechanism between CTMAB and Lou soil. St(CC) demonstrates that the modification of CTMAB to two layers of Lou soil is the coexist of both ionic exchange and hydrophobic bond mechanism. The hydrophobic bond modification appears in the range of modification ratio 20%-28% CEC and linearly increases with an increase of both modification ratio and molar fraction of CTMAB, but its effects on the properties of soil become emergence just until 50% CEC modification ratio, and the hydrophobic bond mode exceeds the ionic exchange mode at about 100% CEC modification ratio and becomes main modification mechanism. The Vanselow selectivity coefficients show that the adsorption preference of Lou soil to CTMAB is stronger than that to calcium ion. The results of thermodynamics indicate that with an increase of modification ratio, the modification reaction transform from exothermic and entropy decrease to endothermic and entropy increase in the range of modification ratio 25% -100% CEC, while both pseudo enthalpy change and pseudo entropy change display a decrease trend in the range of modification ratio 100%-200% CEC, and in total, the modification reaction is a spontaneous reaction which controlled by entropy change in range of modification ratio 25% -100% CEC but controlled by enthalpy change in range of modification ratio 100%-200% CEC. The rationality of modification mechanism could be demonstrated by the results of thermodynamics.
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Affiliation(s)
- Zhao-Fu Meng
- College of Science, Northwest A&F University, Yangling Shaanxi 712100, China.
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Zhang Z, Gong N, Wang W, Xu L, Xu TL. Bell-Shaped D-Serine Actions on Hippocampal Long-Term Depression and Spatial Memory Retrieval. Cereb Cortex 2008; 18:2391-401. [DOI: 10.1093/cercor/bhn008] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Dong C, Gong N, Chen Z, Chen X, Xu Q, Guo H, Zeng Z, Ming C, Chen ZK. Antisense ERK1/2 oligodeoxynucleotide gene therapy attenuates graft arteriosclerosis of aortic transplant in a rat model. Transplant Proc 2007; 38:3304-6. [PMID: 17175255 DOI: 10.1016/j.transproceed.2006.10.136] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2006] [Indexed: 01/20/2023]
Abstract
UNLABELLED Chronic rejection is a major cause of transplant loss that is effected by the extracellular signal-regulated kinases (ERK) pathway. This study investigated the effects of antisense ERK1/2 oligodeoxynucleotide(ODN) gene therapy on chronic rejection. METHODS Lewis (RT1(1)) rats served as recipients of Brown-Norway (BN, RT1n) grafts. The BN rat abdominal aortas were harvested and orthotopically grafted into Lewis rats. The recipients were divided into three groups: (1) control group (n = 9), (2) random ODN transfer group (n = 10), and (3) antisense ODN transfer group (n = 10). At day 60 after transplantation, the recipients were sacrificed; the grafted aortas were evaluated histologically and immunohistochemically. ERK1/2 protein expression in the grafts was determined using Western Blot assays. Serum levels of slCAM-1 were detected by ELISA. RESULTS In the control group and random ODN transfer group, we observed a remarkable degree of intimal hyperplasia and inflammatory cell infiltration, including macrophages and T cells. Compared with the control group, antisense ERK1/2 ODN gene therapy resulted in a significant reduction in neointimal proliferation (P < .01), inhibition of ERK1/2 protein expression (P < .01), decreased graft infiltration with CD4+ T lymphocytes (P < .01), CD8+ T lymphocytes(P < .05), and ED-1 macrophages (P < .01) with decreased serum levels of sICAM-1 (P < .05). We obtained a negative correlation between ERK1/2 expression and immune cell infiltration or ICAM-1 level. CONCLUSIONS Antisense ERK1/2 gene therapy can attenuate graft arteriosclerosis so as to protect aortic allografts. The protection seemed to correlate with inhibition of inflammatory infiltration, implying that the ERK1/2 signal transduction pathway plays an important role in the process of chronic vascular rejection.
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Affiliation(s)
- C Dong
- Institute of Organ Transplantation, Tongji Hospital, Wuhan, Hubei, China
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Gong N, Dong C, Chen Z, Chen X, Guo H, Zeng Z, Ming C, Klaus Chen Z. Adenovirus-Mediated Antisense-ERK2 Gene Therapy Attenuates Chronic Allograft Nephropathy. Transplant Proc 2006; 38:3228-30. [PMID: 17175230 DOI: 10.1016/j.transproceed.2006.10.141] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2006] [Indexed: 12/20/2022]
Abstract
BACKGROUND The aim of this study was to investigate the effects of adenovirus-mediated antisense ERK2 (Adanti-ERK2) gene therapy on chronic allograft nephropathy. METHODS We employed a rat kidney transplantation mode (F344-->Lewis) and studied four groups: (1) controls (n = 6); (2) vector controls (n = 6); (3) an Adanti-ERK2 group (n = 10); and (4) an isograft group (n = 4). The animals were monitored for proteinuria, graft histology, infiltrating cells, and immune-related gene (interleukin-2 [IL-2] and intracellular adhesion molecule-1 [ICAM-1]) expression for 20 weeks after transplantation. RESULTS The control group had increasing proteinuria during the 20-week follow-up. All rats showed advanced chronic renal failure associated with strong immune cell infiltration and immune gene expression. Chronic graft injury was accelerated in the vector-control group, but no significant difference was observed compared with the control group. In contrast, the Adanti-ERK2 group showed less inflammation and improved graft histology/function compared with controls. Moreover, ERK2 protein expression in the Adanti-ERK2 group was lower than in the control group (P < .05) and vector-control group (P < .05). Furthermore, serial estimates of genes (IL-2, ICAM-1) related to chronic rejection showed significant downregulation in the Adanti-ERK2 group (P < .01). CONCLUSIONS Adenovirus-mediated antisense ERK2 gene therapy attenuated chronic allograft nephropathy. The protective effects of antisense ERK2 gene therapy may have derived from a blocked ERK signal transduction pathway, which reduced ERK expression as well as those of immune-related genes.
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Affiliation(s)
- N Gong
- Institute of Organ Transplantation, Tongji Hospital, Wuhan, Hubei, China.
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Abstract
In this study, we explored the immunomodulatory effects of viral interleukin (IL) IL-10 after ex vivo and in vivo gene transfer in experimental corneal transplantation. Wistar-Furth rats were used as donors and major histocompatibility complex class I/II-disparate Lewis rats served as recipients. For ex vivo gene therapy donor corneas were either transfected with liposome/vIL-10 plasmid DNA mixtures or transduced with a vIL-10 expressing adenovirus vector (AdvIL-10). For in vivo studies, recipients were treated with AdvIL-10 intraperitoneally 1 day before transplantation. Graft survival was analysed using the Kaplan-Meier survival method. To monitor the efficacy of the therapy messenger RNA (mRNA) cytokine expression profiles in grafts and draining lymph nodes were analysed by quantitative real-time reverse transcription-polymerase chain reaction. Moreover, anti-adenovirus immunity was also investigated. Neither ex vivo liposome-mediated vIL-10 gene transfer nor ex vivo AdvIL-10 gene transfer led to prolonged corneal allograft survival. In contrast, corneal allograft survival was significantly prolonged in animals receiving systemic AdvIL-10 gene transfer. Moreover, only systemic vIL-10 gene therapy modulated the cytokine mRNA expression profile in draining lymph nodes. Interestingly, systemic AdvIL-10 gene transfer could not inhibit the generation of anti-adenovirus antibodies. Our data indicate systemic expression of the vIL-10 gene is required to modulate the cytokine expression profile in the draining lymph nodes, which might be a pre-requisite for the success of cytokine gene therapy.
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Affiliation(s)
- N Gong
- Department of Ophthalmology, Charité - University Medicine Berlin, Germany
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