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Mao ND, Xu Y, Che H, Yao X, Gao Y, Wang C, Deng H, Hui Z, Zhang H, Ye XY. Design, synthesis and biological evaluation of novel 1,2,4a,5-tetrahydro-4H-benzo[b][1,4]oxazino[4,3-d][1,4]oxazine-based AAK1 inhibitors with anti-viral property against SARS-CoV-2. Eur J Med Chem 2024; 268:116232. [PMID: 38377825 DOI: 10.1016/j.ejmech.2024.116232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/09/2024] [Accepted: 02/10/2024] [Indexed: 02/22/2024]
Abstract
Coronavirus entry into host cells hinges on the interaction between the spike glycoprotein of the virus and the cell-surface receptor angiotensin-converting enzyme 2 (ACE2), initiating the subsequent clathrin-mediated endocytosis (CME) pathway. AP-2-associated protein kinase 1 (AAK1) holds a pivotal role in this pathway, regulating CME by modulating the phosphorylation of the μ subunit of adaptor protein 2 (AP2M1). Herein, we report a series of novel AAK1 inhibitors based on previously reported 1,2,4a,5-tetrahydro-4H-benzo[b] [1,4]oxazino[4,3-d] [1,4]oxazine scaffold. Among 23 synthesized compounds, compound 12e is the most potent one with an IC50 value of 9.38 ± 0.34 nM against AAK1. The in vitro antiviral activity of 12e against SARS-CoV-2 was evaluated using a model involving SARS-CoV-2 pseudovirus infecting hACE2-HEK293 host cells. The results revealed that 12e was superior in vitro antiviral activity against SARS-CoV-2 entry into host cells when compared to SGC-AAK1-1 and LX9211, and its activity was comparable to that of a related and reference compound 8. Mechanistically, all AAK1 inhibitors attenuated AAK1-induced phosphorylation of AP2M1 threonine 156 and disrupted the direct interaction between AP2M1 and ACE2, ultimately inhibiting SARS-CoV-2 infection. Notably, compounds 8 and 12e exhibited a more potent effect in suppressing the phosphorylation of AP2M1 T156 and the interaction between AP2M1 and ACE2. In conclusion, novel AAK1 inhibitor 12e demonstrates significant efficacy in suppressing SARS-CoV-2 infection, and holds promise as a potential candidate for developing novel antiviral drugs against SARS-CoV-2 and other coronavirus infections.
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Affiliation(s)
- Nian-Dong Mao
- School of Pharmacy, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China; Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China; School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China
| | - Yueying Xu
- School of Pharmacy, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China; Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China
| | - Hao Che
- School of Pharmacy, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China; Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China
| | - Xia Yao
- School of Pharmacy, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China; Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China
| | - Yuan Gao
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Chenchen Wang
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China
| | - Haowen Deng
- School of Pharmacy, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China; Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China
| | - Zi Hui
- School of Pharmacy, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China; Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China.
| | - Hang Zhang
- School of Basic Medical Science, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China.
| | - Xiang-Yang Ye
- School of Pharmacy, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China; Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China; School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China.
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Zhou Y, Wang W, Ge G, Li J, Zhang D, He M, Tang B, Zhong J, Zhou L, Li R, Mao N, Che H, Qian L, Li Y, Qin F, Fang J, Chen X, Wang J, Zhan M. High-Precision Atom Interferometer-Based Dynamic Gravimeter Measurement by Eliminating the Cross-Coupling Effect. Sensors (Basel) 2024; 24:1016. [PMID: 38339733 PMCID: PMC10857408 DOI: 10.3390/s24031016] [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: 12/30/2023] [Revised: 01/31/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024]
Abstract
A dynamic gravimeter with an atomic interferometer (AI) can perform absolute gravity measurements with high precision. AI-based dynamic gravity measurement is a type of joint measurement that uses an AI sensor and a classical accelerometer. The coupling of the two sensors may degrade the measurement precision. In this study, we analyzed the cross-coupling effect and introduced a recovery vector to suppress this effect. We improved the phase noise of the interference fringe by a factor of 1.9 by performing marine gravity measurements using an AI-based gravimeter and optimizing the recovery vector. Marine gravity measurements were performed, and high gravity measurement precision was achieved. The external and inner coincidence accuracies of the gravity measurement were ±0.42 mGal and ±0.46 mGal after optimizing the cross-coupling effect, which was improved by factors of 4.18 and 4.21 compared to the cases without optimization.
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Affiliation(s)
- Yang Zhou
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenzhang Wang
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guiguo Ge
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jinting Li
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Danfang Zhang
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Meng He
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Biao Tang
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- Wuhan Institute of Quantum Technology, Wuhan 430206, China
- Hefei National Laboratory, Hefei 230094, China
| | - Jiaqi Zhong
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- Wuhan Institute of Quantum Technology, Wuhan 430206, China
- Hefei National Laboratory, Hefei 230094, China
| | - Lin Zhou
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- Wuhan Institute of Quantum Technology, Wuhan 430206, China
- Hefei National Laboratory, Hefei 230094, China
| | - Runbing Li
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- Wuhan Institute of Quantum Technology, Wuhan 430206, China
- Hefei National Laboratory, Hefei 230094, China
| | - Ning Mao
- School of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China; (N.M.); (H.C.); (L.Q.); (Y.L.)
| | - Hao Che
- School of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China; (N.M.); (H.C.); (L.Q.); (Y.L.)
| | - Leiyuan Qian
- School of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China; (N.M.); (H.C.); (L.Q.); (Y.L.)
| | - Yang Li
- School of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China; (N.M.); (H.C.); (L.Q.); (Y.L.)
| | - Fangjun Qin
- School of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China; (N.M.); (H.C.); (L.Q.); (Y.L.)
| | - Jie Fang
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- Wuhan Institute of Quantum Technology, Wuhan 430206, China
- Hefei National Laboratory, Hefei 230094, China
| | - Xi Chen
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- Wuhan Institute of Quantum Technology, Wuhan 430206, China
- Hefei National Laboratory, Hefei 230094, China
| | - Jin Wang
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- Wuhan Institute of Quantum Technology, Wuhan 430206, China
- Hefei National Laboratory, Hefei 230094, China
| | - Mingsheng Zhan
- Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; (Y.Z.); (W.W.); (G.G.); (J.L.); (D.Z.); (M.H.); (B.T.); (J.Z.); (L.Z.); (R.L.); (J.W.); (M.Z.)
- Wuhan Institute of Quantum Technology, Wuhan 430206, China
- Hefei National Laboratory, Hefei 230094, China
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Sun BW, Zhang PP, Wang ZH, Yao X, He ML, Bai RT, Che H, Lin J, Xie T, Hui Z, Ye XY, Wang LW. Prevention and Potential Treatment Strategies for Respiratory Syncytial Virus. Molecules 2024; 29:598. [PMID: 38338343 PMCID: PMC10856762 DOI: 10.3390/molecules29030598] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 01/23/2024] [Accepted: 01/23/2024] [Indexed: 02/12/2024] Open
Abstract
Respiratory syncytial virus (RSV) is a significant viral pathogen that causes respiratory infections in infants, the elderly, and immunocompromised individuals. RSV-related illnesses impose a substantial economic burden worldwide annually. The molecular structure, function, and in vivo interaction mechanisms of RSV have received more comprehensive attention in recent times, and significant progress has been made in developing inhibitors targeting various stages of the RSV replication cycle. These include fusion inhibitors, RSV polymerase inhibitors, and nucleoprotein inhibitors, as well as FDA-approved RSV prophylactic drugs palivizumab and nirsevimab. The research community is hopeful that these developments might provide easier access to knowledge and might spark new ideas for research programs.
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Affiliation(s)
- Bo-Wen Sun
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China; (B.-W.S.); (P.-P.Z.); (Z.-H.W.); (X.Y.); (M.-L.H.); (R.-T.B.); (H.C.); (T.X.); (Z.H.)
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
| | - Peng-Peng Zhang
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China; (B.-W.S.); (P.-P.Z.); (Z.-H.W.); (X.Y.); (M.-L.H.); (R.-T.B.); (H.C.); (T.X.); (Z.H.)
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
| | - Zong-Hao Wang
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China; (B.-W.S.); (P.-P.Z.); (Z.-H.W.); (X.Y.); (M.-L.H.); (R.-T.B.); (H.C.); (T.X.); (Z.H.)
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
| | - Xia Yao
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China; (B.-W.S.); (P.-P.Z.); (Z.-H.W.); (X.Y.); (M.-L.H.); (R.-T.B.); (H.C.); (T.X.); (Z.H.)
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
| | - Meng-Lan He
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China; (B.-W.S.); (P.-P.Z.); (Z.-H.W.); (X.Y.); (M.-L.H.); (R.-T.B.); (H.C.); (T.X.); (Z.H.)
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
| | - Rui-Ting Bai
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China; (B.-W.S.); (P.-P.Z.); (Z.-H.W.); (X.Y.); (M.-L.H.); (R.-T.B.); (H.C.); (T.X.); (Z.H.)
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
| | - Hao Che
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China; (B.-W.S.); (P.-P.Z.); (Z.-H.W.); (X.Y.); (M.-L.H.); (R.-T.B.); (H.C.); (T.X.); (Z.H.)
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
| | - Jing Lin
- Drug Discovery, Hangzhou Haolu Pharma Co., Hangzhou 311121, China;
| | - Tian Xie
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China; (B.-W.S.); (P.-P.Z.); (Z.-H.W.); (X.Y.); (M.-L.H.); (R.-T.B.); (H.C.); (T.X.); (Z.H.)
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
| | - Zi Hui
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China; (B.-W.S.); (P.-P.Z.); (Z.-H.W.); (X.Y.); (M.-L.H.); (R.-T.B.); (H.C.); (T.X.); (Z.H.)
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
| | - Xiang-Yang Ye
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China; (B.-W.S.); (P.-P.Z.); (Z.-H.W.); (X.Y.); (M.-L.H.); (R.-T.B.); (H.C.); (T.X.); (Z.H.)
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
| | - Li-Wei Wang
- School of Pharmacy, Hangzhou Normal University, Hangzhou 311121, China; (B.-W.S.); (P.-P.Z.); (Z.-H.W.); (X.Y.); (M.-L.H.); (R.-T.B.); (H.C.); (T.X.); (Z.H.)
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
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Xu Y, Che H, Liu J, Ye P. Association of metformin and statin uses with the prognosis of colon cancer: a meta-analysis. Eur J Cancer Prev 2024:00008469-990000000-00124. [PMID: 38215022 DOI: 10.1097/cej.0000000000000872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2024]
Abstract
BACKGROUND Metformin and statins are commonly used globally for the treatment of type 2 diabetes mellitus and dyslipidemia, respectively. Recently, multiple novel pathways have been discovered, which may contribute to the treatment of various types of cancer. Several meta-analysis studies have reported that the use of metformin or statins is associated with a lower risk of colon cancer compared to nonusers. In this study, our aim was to perform a meta-analysis and investigate the prognostic roles of these two medications in colon cancer. METHODS To identify relevant articles, literature searches were performed in the PubMed and Web of Science databases using a combination of keywords related to metformin, statins and colon cancer prognosis until August 2023. The study utilized STATA 12.0 software (Stata Corporation, College Station, Texas, USA) to compute all the hazard ratios (HRs) and 95% confidence intervals (CIs) regarding the association between metformin or statin uses and prognostic-related outcomes. RESULTS Our analysis revealed that the use of metformin was associated with a significantly lower overall mortality of colon cancer (HR = 0.63; 95% CI = 0.51-0.77; I2 = 94.9%; P < 0.001), as well as lower cancer-specific mortality of colon cancer (HR = 0.68; 95% CI = 0.50-0.94; I2 = 91.9%; P < 0.001). Similarly, the use of statins was also associated with a lower overall mortality of colon cancer (HR = 0.68; 95% CI = 0.60-0.78; I2 = 93.8%; P < 0.001), as well as a lower cancer-specific mortality of colon cancer (HR = 0.74; 95% CI = 0.67-0.81; I2 = 82.2%; P < 0.001). CONCLUSION Our meta-analysis study suggests that statins and metformin may have potential as adjuvant agents with significant benefits in the prognosis of colon cancer.
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Affiliation(s)
- Yanyan Xu
- Department of Anus and Colorectal Surgery, Shaoxing People's Hospital, Shaoxing, China
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Li Z, Che H, Lu J, Ying X. Sigmoid colon metastasis after radical nephrectomy for clear-cell renal cell carcinoma: A case report. Asian J Surg 2023; 46:6091-6092. [PMID: 37778974 DOI: 10.1016/j.asjsur.2023.09.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 09/12/2023] [Indexed: 10/03/2023] Open
Affiliation(s)
- Zhenjun Li
- Shaoxing People's Hospital, No 568, Zhongxing Road, Shaoxing, 312000, China; Department of Colorectal and Anal Surgery, Shaoxing People's Hospital, No 568, Zhongxing Road, Shaoxing, 312000, China
| | - Hao Che
- Shaoxing People's Hospital, No 568, Zhongxing Road, Shaoxing, 312000, China; Department of Colorectal and Anal Surgery, Shaoxing People's Hospital, No 568, Zhongxing Road, Shaoxing, 312000, China
| | - Jialiang Lu
- School of Medicine, ShaoXing University, Shaoxing, 312000, China
| | - Xiaojiang Ying
- Shaoxing People's Hospital, No 568, Zhongxing Road, Shaoxing, 312000, China; Department of Colorectal and Anal Surgery, Shaoxing People's Hospital, No 568, Zhongxing Road, Shaoxing, 312000, China.
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Zheng K, Lin H, Hong X, Che H, Ma X, Wei X, Mei L. Development of a multispectral fluorescence LiDAR for point cloud segmentation of plants. Opt Express 2023; 31:18613-18629. [PMID: 37381570 DOI: 10.1364/oe.490004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 05/08/2023] [Indexed: 06/30/2023]
Abstract
The accelerating development of high-throughput plant phenotyping demands a LiDAR system to achieve spectral point cloud, which will significantly improve the accuracy and efficiency of segmentation based on its intrinsic fusion of spectral and spatial data. Meanwhile, a relatively longer detection range is required for platforms e.g., unmanned aerial vehicles (UAV) and poles. Towards the aims above, what we believe to be, a novel multispectral fluorescence LiDAR, featuring compact volume, light weight, and low cost, has been proposed and designed. A 405 nm laser diode was employed to excite the fluorescence of plants, and the point cloud attached with both the elastic and inelastic signal intensities that was obtained through the R-, G-, B-channels of a color image sensor. A new position retrieval method has been developed to evaluate far field echo signals, from which the spectral point cloud can be obtained. Experiments were designed to validate the spectral/spatial accuracy and the segmentation performance. It has been found out that the values obtained through the R-, G-, B-channels are consistent with the emission spectrum measured by a spectrometer, achieving a maximum R2 of 0.97. The theoretical spatial resolution can reach up to 47 mm and 0.7 mm in the x- and y-direction at a distance of around 30 m, respectively. The values of recall, precision, and F score for the segmentation of the fluorescence point cloud were all beyond 0.97. Besides, a field test has been carried out on plants at a distance of about 26 m, which further demonstrated that the multispectral fluorescence data can significantly facilitate the segmentation process in a complex scene. These promising results prove that the proposed multispectral fluorescence LiDAR has great potential in applications of digital forestry inventory and intelligent agriculture.
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Mao ND, Gao Y, Dang XW, Duan JL, Hui Z, Che H, Xu Y, Zhang H, He X, Garrido C, Ye XY. Design, synthesis and biological evaluation of novel HDACs inhibitors based on pyrrolo[2,3-d]pyrimidine and pyrrolo[2,3-b]pyridine scaffolds. ChemMedChem 2023:e202200683. [PMID: 37126396 DOI: 10.1002/cmdc.202200683] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 03/24/2023] [Accepted: 04/24/2023] [Indexed: 05/02/2023]
Abstract
Histone deacetylases (HDACs) are validated targets for the development of anticancer drugs in epigenetics. We have designed and synthesized a series of novel HDACs inhibitors based on pyrrolo[2,3-d]pyrimidine and pyrrolo[2,3-b]pyridine scaffolds. Compound B3 exhibits potent inhibitory activity against HDAC1 and HDAC6 with IC50 values of 5.2 nM and 4.4 nM, respectively. It exhibited potent anti-proliferative effects against three tumour cell lines (IC50 = 0.13, 0.37, and 1.11 µM, MV-4-11, K562, and WSU-DLCL-2 respectively) with 2-6 fold improvement comparing to SAHA. Mechanistic studies on WSU-DLCL-2 cell reveal that B3 exhibits anticancer effects through induction of G0/G1 phase arrest and promotion of apoptosis. The result warrants further investigation of this series of compounds for the treatment of hematological malignancy.
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Affiliation(s)
- Nian-Dong Mao
- Hangzhou Normal University, School of Pharmacy, CHINA
| | - Yuan Gao
- Hangzhou Normal University, School of Pharmacy, CHINA
| | - Xia-Wen Dang
- Hangzhou Normal University, School of Pharmacy, CHINA
| | - Ji-Long Duan
- Hangzhou Normal University, School of Pharmacy, CHINA
| | - Zi Hui
- Hangzhou Normal University, School of Pharmacy, CHINA
| | - Hao Che
- Hangzhou Normal University, School of Pharmacy, CHINA
| | - Yueying Xu
- Hangzhou Normal University, School of Pharmacy, CHINA
| | - Hang Zhang
- Hangzhou Normal University, School of Basic Medical Science, CHINA
| | - Xingrui He
- Hangzhou Normal University, School of Pharmacy, CHINA
| | | | - Xiang-Yang Ye
- Hangzhou Normal University, School of Pharmacy, 2318 Yuhang Tang Road, 311121, Hangzhou, CHINA
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8
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Che H, Li A, Zhou Z, Gong W, Ma J, Qin F. An Approach of Vibration Compensation for Atomic Gravimeter under Complex Vibration Environment. Sensors (Basel) 2023; 23:3535. [PMID: 37050595 PMCID: PMC10098680 DOI: 10.3390/s23073535] [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] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 03/16/2023] [Accepted: 03/24/2023] [Indexed: 06/19/2023]
Abstract
Atomic gravimeter has been more frequently applied under complex and dynamic environments, but its measurement accuracy is seriously hampered by vibration-induced noise. In this case, vibration compensation provides a way to enhance the accuracy of gravity measurements by correcting the phase noise that resulted from the vibration of a Raman reflector, and improving the fitting of an interference fringe. An accurate estimation of the transfer function of vibration between the Raman reflector and the sensor plays a significant role in optimizing the effect of vibration compensation. For this reason, a vibration compensation approach was explored based on EO (equilibrium optimizer) for estimating the transfer function simplified model of a Raman reflector, and it was used to correct the interference fringe of an atomic gravimeter. The test results revealed that this approach greatly restored the actual vibration of the Raman reflector in a complex vibration environment. With a vibration compensation algorithm, it achieved the correction and fitting of the original interference fringe. In general, it dramatically reduced the RMSE (root mean square error) at the time of fitting and significantly improved the residual error in the gravity measurement. Compared with other conventional algorithms, such as GA (genetic algorithm) and PSO (particle swarm optimization), this approach realized a faster convergence and better optimization, so as to ensure more accurate gravity measurements. The study of this vibration compensation approach could provide a reference for the application of an atomic gravimeter in a wider and more complex environment.
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9
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Gao Y, Mao ND, Che H, Xu L, Bai R, Wang LW, Ye XY, Xie T. Novel hydroxyl carboximates derived from β-elemene: design, synthesis and anti-tumour activities evaluation. J Enzyme Inhib Med Chem 2022; 37:2403-2416. [PMID: 36065895 PMCID: PMC9467605 DOI: 10.1080/14756366.2022.2117314] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
A series of novel N-alkyl-N-hydroxyl carboximates derived from β-elemene were fortuitously discovered. Most of them showed more potent anti-proliferative activities than their lead compound β-elemene (1). Notably, compound 11i exhibited significant inhibitory effects on the proliferation of three lung cell lines (H1975, A549 and H460) and several other tumour cell lines (H1299, U87MG, MV4-11, and SU-DHL-2). Preliminary mechanistic studies revealed that compound 11i could significantly induce cell apoptosis. Further in vivo study in the H460 xenograft mouse model validated the anti-tumour activities of 11i with a greater tumour growth inhibition (TGI, 68.3%) than β-elemene and SAHA (50.1% and 55.9% respectively) at 60 mg/kg ip dosing, without obvious body weight loss and toxicity. Thus, such N-alkyl-N-hydroxyl carboximate class of compounds exemplified as 11i demonstrated potent anticancer activities both in vitro and in vivo, and should warrant further investigation for potential anticancer therapy.
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Affiliation(s)
- Yuan Gao
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicine of Zhejiang Province, Hangzhou, China.,Engineering Laboratory of Development and Application of Traditional Chinese Medicine from Zhejiang Province, Hangzhou, China.,Collaborative Innovation Center of Chinese Medicines from Zhejiang Province, Hangzhou, China.,Institute of Chinese Materia Medical, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Nian-Dong Mao
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicine of Zhejiang Province, Hangzhou, China.,Engineering Laboratory of Development and Application of Traditional Chinese Medicine from Zhejiang Province, Hangzhou, China.,Collaborative Innovation Center of Chinese Medicines from Zhejiang Province, Hangzhou, China
| | - Hao Che
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicine of Zhejiang Province, Hangzhou, China.,Engineering Laboratory of Development and Application of Traditional Chinese Medicine from Zhejiang Province, Hangzhou, China.,Collaborative Innovation Center of Chinese Medicines from Zhejiang Province, Hangzhou, China
| | - Li Xu
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicine of Zhejiang Province, Hangzhou, China.,Engineering Laboratory of Development and Application of Traditional Chinese Medicine from Zhejiang Province, Hangzhou, China.,Collaborative Innovation Center of Chinese Medicines from Zhejiang Province, Hangzhou, China
| | - Renren Bai
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicine of Zhejiang Province, Hangzhou, China.,Engineering Laboratory of Development and Application of Traditional Chinese Medicine from Zhejiang Province, Hangzhou, China.,Collaborative Innovation Center of Chinese Medicines from Zhejiang Province, Hangzhou, China
| | - Li-Wei Wang
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicine of Zhejiang Province, Hangzhou, China.,Engineering Laboratory of Development and Application of Traditional Chinese Medicine from Zhejiang Province, Hangzhou, China.,Collaborative Innovation Center of Chinese Medicines from Zhejiang Province, Hangzhou, China
| | - Xiang-Yang Ye
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicine of Zhejiang Province, Hangzhou, China.,Engineering Laboratory of Development and Application of Traditional Chinese Medicine from Zhejiang Province, Hangzhou, China.,Collaborative Innovation Center of Chinese Medicines from Zhejiang Province, Hangzhou, China
| | - Tian Xie
- School of Pharmacy, Hangzhou Normal University, Hangzhou, China.,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicine of Zhejiang Province, Hangzhou, China.,Engineering Laboratory of Development and Application of Traditional Chinese Medicine from Zhejiang Province, Hangzhou, China.,Collaborative Innovation Center of Chinese Medicines from Zhejiang Province, Hangzhou, China.,Institute of Chinese Materia Medical, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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10
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Che H, Ying XJ, Li ZJ, Chen MM. [Regulation of Toll-like receptors and their downstream factors by butyrate]. Sheng Li Xue Bao 2022; 74:827-836. [PMID: 36319105] [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
Butyrate, normally produced by probiotics in the gut, not only provides energy for cells, but also changes the phosphorylation, acetylation and methylation levels of many proteins in cells. As a result, it affects the expression of many genes and the transmission of cell signals. Through G protein-coupled receptors, butyrate promotes the secretion of intestinal mucus and the formation of epithelial barriers, and attenuates the impacts of the pathogenic bacteria and their metabolites on human body. The Toll-like receptors (TLRs) are a group of pattern recognition receptors, and their activation causes the translocation of nuclear factor κB (NF-κB) from the cytoplasm to the nucleus and eventually leads to expression and secretion of various pro-inflammatory factors and chemokines. The expression of TLRs is also involved in the pathogenesis of some inflammatory diseases and tumors. The purpose of this review is to summarize the effects of butyrate on TLRs and their downstream signaling pathways. We not only summarized the production of butyrate, the expression of TLRs and the influence of their interaction on the body under the conditions of inflammation and tumor, but also discussed the potential role of butyrate as a bacterial metabolite in the treatments of some human diseases.
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Affiliation(s)
- Hao Che
- Shaoxing University School of Medicine, Shaoxing 312000, China
| | - Xiao-Jiang Ying
- Shaoxing University School of Medicine, Shaoxing 312000, China
| | - Zhen-Jun Li
- Shaoxing University School of Medicine, Shaoxing 312000, China
| | - Ming-Min Chen
- Shaoxing University School of Medicine, Shaoxing 312000, China.
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11
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Cai C, Zhang B, Sun T, Zhao F, Ma J, Pei X, He C, Che H, Zhao L, Wang Y. Neutrophil Percentage to Albumin Ratio was Associated with Clinical Outcomes in Coronary Care Unit Patients. Rev Cardiovasc Med 2022. [DOI: 10.31083/j.rcm2310333] [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: 11/06/2022] Open
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12
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Abstract
AbstractIn current infrastructure-as-a service (IaaS) cloud services, customers are charged for the usage of computing/storage resources only, but not the network resource. The difficulty lies in the fact that it is nontrivial to allocate network resource to individual customers effectively, especially for short-lived flows, in terms of both performance and cost, due to highly dynamic environments by flows generated by all customers. To tackle this challenge, in this paper, we propose an end-to-end Price-Aware Congestion Control Protocol (PACCP) for cloud services. PACCP is a network utility maximization (NUM) based optimal congestion control protocol. It supports three different classes of services (CoSes), i.e., best effort service (BE), differentiated service (DS), and minimum rate guaranteed (MRG) service. In PACCP, the desired CoS or rate allocation for a given flow is enabled by properly setting a pair of control parameters, i.e., a minimum guaranteed rate and a utility weight, which in turn, determines the price paid by the user of the flow. Two pricing models, i.e., a coarse-grained VM-Based Pricing model (VBP) and a fine-grained Flow-Based Pricing model (FBP), are proposed. The optimality of PACCP is verified by both large scale simulation and small testbed implementation. The price-performance consistency of PACCP are evaluated using real datacenter workloads. The results demonstrate that PACCP provides minimum rate guarantee, high bandwidth utilization and fair rate allocation, commensurate with the pricing models.
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13
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Su S, Tang X, Che H, Zhen J, Liu L, Zhao N, Liu J, Guan C, Fu S, Wang L, Li H, Zhang D, Wang Q, Zhen D. [Correlation of baseline serum 25-hydroxyvitamin D level with the risk of type 2 diabetes mellitus: a prospective cohort study]. Nan Fang Yi Ke Da Xue Xue Bao 2021; 41:811-819. [PMID: 34238732 DOI: 10.12122/j.issn.1673-4254.2021.06.02] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To investigate the correlation of baseline serum 25(OH) D level with the risk of type 2 diabetes mellitus (T2DM) and blood glucose control in diabetic patients among the middle-aged and elderly individuals in Chengguan District of Lanzhou, Gansu Province. OBJECTIVE Residents aged 40 to 75 years in Lanzhou were selected from the "REACTION" study conducted in 2011 and had been followed up since 2014. A total of 5044 subjects with complete data from the two surveys were analyzed. Participants were divided into Q1, Q2, Q3, and Q4 subgroups based on quartiles of serum 25(OH)D level for comparison of the incidence of T2DM and blood glucose control. OBJECTIVE Baseline 25(OH)D level was not found to correlate with FPG, 2h-PG or HbA1c levels among the residents (P>0.05). The participants were followed up for a mean of 3.4±0.6 years, and compared with those in Q1 group, the participants in Q2, Q3 and Q4 groups did not show significantly lowered risk of prediabetes or diabetes regardless of glucose tolerance status. Among the patients with T2DM, the compliance rate of glycemic control after the follow-up was significantly higher than that before the follow-up (63.4% vs 60.6%), and the levels of HbA1c, FPG, and 2h-PG decreased obviously after the follow-up. But compared with Q1 group, Q2, Q3 and Q4 groups showed no significant changes in glycemic control compliance rate or levels of HbA1c, FPG and 2h-PG after the follow-up (P>0.05). OBJECTIVE There is no evidence that baseline 25(OH)D levels are associated with the risk of diabetes and blood glucose control in patients with T2DM.
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Affiliation(s)
- S Su
- First Clinical Medical College First Hospital of Lanzhou University, Lanzhou 730000 China.,Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - X Tang
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - H Che
- Department of Endocrinology, Gansu Provincial Third People's Hospital, Lanzhou 730000, China
| | - J Zhen
- Department of Gynecology, Gansu Provincial People's Hospital, Lanzhou 730000, China
| | - L Liu
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - N Zhao
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - J Liu
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - C Guan
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - S Fu
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - L Wang
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - H Li
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - D Zhang
- First Clinical Medical College First Hospital of Lanzhou University, Lanzhou 730000 China.,Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
| | - Q Wang
- First Clinical Medical College First Hospital of Lanzhou University, Lanzhou 730000 China.,Department of Endocrinology, Gansu Provincial Third People's Hospital, Lanzhou 730000, China
| | - D Zhen
- Department of Endocrinology, First Hospital of Lanzhou University, Lanzhou 730000 China
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14
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Che H, Lv YF, Liu YG, Hou YX, Zhao LY. Effect of ulinastatin on myocardial ischemia reperfusion injury through ERK signaling pathway. Eur Rev Med Pharmacol Sci 2020; 23:4458-4464. [PMID: 31173321 DOI: 10.26355/eurrev_201905_17957] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To study the effect of ulinastatin (UTI) on myocardial ischemia-reperfusion injury (MIRI) through the extracellular signal-regulated kinase (ERK) signaling pathway. MATERIALS AND METHODS A total of 24 Sprague-Dawley rats were randomly divided into sham group (n=8), I/R group (n=8), and UTI group (n=8), and the rat model of MIRI was established. The changes in the content of serum biochemical indexes, including superoxide dismutase (SOD) and malondialdehyde (MDA), were detected using the kits, and the changes in the expressions of serum inflammatory factors, including interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α), were detected using the quantitative Reverse Transcription-Polymerase Chain Reaction (qRT-PCR) and enzyme-linked immunosorbent assay (ELISA) kits. Moreover, the ERK phosphorylation level in myocardial tissues was detected using the immunofluorescence method, and the ERK phosphorylation level and cleaved caspase-3 expression were detected via qRT-PCR and Western blotting. RESULTS Compared with those in sham group, the serum SOD content significantly declined, while the MDA content was significantly increased in I/R group, and they were significantly improved in UTI group (p<0.01). The results of detection using qRT-PCR and ELISA kits revealed that the inflammatory factors (IL-6 and TNF-α) in UTI group were significantly improved (p<0.01). The immunofluorescence results showed that the ERK phosphorylation level in myocardial tissues was significantly increased in UTI group. The results of qRT-PCR and Western blotting manifested that both ERK phosphorylation level and cleaved caspase-3 expression were significantly improved in UTI group (p<0.01). CONCLUSIONS UTI can play a protective role in MIRI through up-regulating the ERK signaling pathway.
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Affiliation(s)
- H Che
- Department of Anesthesiology, Beijing Anzhen Hospital of Capital Medical University, Beijing, China.
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15
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Guo X, Cheng L, Yang S, Che H. Pro-inflammatory immunological effects of adipose tissue and risk of food allergy in obesity: Focus on immunological mechanisms. Allergol Immunopathol (Madr) 2020; 48:306-312. [PMID: 31477390 DOI: 10.1016/j.aller.2019.06.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 05/21/2019] [Accepted: 06/03/2019] [Indexed: 12/12/2022]
Abstract
Over the past three decades, the number of obese people has risen steadily. The chronic low-grade inflammatory state and the non-specific activation of the immune system have contributed greatly to the development of obesity-related immunology. Food allergy as a kind of inflammatory disease with abnormal immune response may be associated with obesity. This review begins with the pro-inflammatory immunological effects of adipose tissue in obesity, and explains the possible effects of obesity on food allergy. In short, obesity not only directly causes imbalance of allergic-related immune cells in adipose tissue, but also indirectly causes this consequence through affecting expression of adipocytokines and peroxisome proliferator-activated receptor gamma (PPARγ) in adipose tissue. As a result, circulating levels of pro-inflammatory factors which are partly derived from adipose tissue increase, which might cause intestinal barrier injury. Therefore, obesity may increase the risk of food allergy.
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Affiliation(s)
- X Guo
- College of Food Science and Nutritional Engineering, China Agricultural University, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, China
| | - L Cheng
- College of Food Science and Nutritional Engineering, China Agricultural University, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, China
| | - S Yang
- College of Food Science and Nutritional Engineering, China Agricultural University, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, China
| | - H Che
- College of Food Science and Nutritional Engineering, China Agricultural University, China; Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, China.
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16
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He R, Wu JX, Zhang Y, Che H, Yang L. LncRNA LINC00628 overexpression inhibits the growth and invasion through regulating PI3K/Akt signaling pathway in osteosarcoma. Eur Rev Med Pharmacol Sci 2019; 22:5857-5866. [PMID: 30280767 DOI: 10.26355/eurrev_201809_15915] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Osteosarcoma (OS) is the most common primary malignancy, mainly arising from the metaphysic of the long bones of adolescents and young adults. Although osteosarcoma has been studied widely, the underlying molecular mechanism remains unclear. Increasing evidence shows that abnormal long non-coding RNAs (LncRNAs) expression is involved in tumorigenesis. The aim of this study was to identify the detailed role of LncRNA LINC00628 in osteosarcoma. MATERIALS AND METHODS The relative mRNA expression level of LINC00628 in adjacent tissues, osteosarcoma tissues with or without metastasis and osteosarcoma cell lines were detected by qRT-PCR. Overall survival curves for two groups defined by high and low expression level of LINC00628 in osteosarcoma patients. The cell proliferation, invasion and migration in osteosarcoma cells after transfection with lncRNA- NC or lncRNA-LINC00628 were detected. The cell cycle distribution and apoptosis rate in osteosarcoma cells after transfection with lncRNA- NC or lncRNA-LINC00628 were measured using the Flow cytometry analysis. The relative protein expression level of p-PI3K, p-Akt, P53 and Bcl-2 in osteosarcoma cells after transfection with lncRNA- NC or lncRNA-LINC00628 were detected by Western blot. RESULTS LINC00628 expression was significantly decreased in osteosarcoma tissues compared with adjacent tissues. Meanwhile, osteosarcoma tissues with metastasis were significantly associated with a low expression level of LINC00628 and the low expression level of LINC00628 has a lower overall survival rate. LINC00628 expression was increased in osteosarcoma cell lines after transfection with lncRNA-LINC00628 and the cell proliferation, invasion and migration in osteosarcoma cells after transfection with lncRNA-LINC00628 were significantly inhibited. Moreover, the cell cycle was arrested in G0/G1 phase and the apoptosis rate was increased in osteosarcoma cells after transfection with lncRNA-LINC00628. Mechanistically, the relative protein expression level of p-PI3K, p-Akt and Bcl-2 were significantly increased and the relative expression of P53 was significantly decreased in osteosarcoma cells after transfection with lncRNA-LINC00628. CONCLUSIONS LINC00628 expression was decreased in osteosarcoma. The overexpression of LINC00628 inhibited the proliferation, invasion and migration and promoted cell apoptosis in osteosarcoma cells through the inactivation of PI3K/Akt signaling pathway. This lncRNA may be involved in the development and progression of osteosarcoma.
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Affiliation(s)
- R He
- Center for Joint Surgery, Southwest Hospital, Third Military Medical University, Chongqing (Army Medical University), China.
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17
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Wang J, Ashour M, Lagoa CM, Aybat NS, Che H. A fully distributed traffic allocation algorithm for nonconcave utility maximization in connectionless communication networks. Automatica (Oxf) 2019; 109:108506. [PMID: 34045767 PMCID: PMC8153178 DOI: 10.1016/j.automatica.2019.108506] [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] [Indexed: 06/12/2023]
Abstract
As IP video services have emerged to be the predominant Internet application, how to optimize the Internet resource allocation, while satisfying the quality of experience (QoE) for users of video services and other Internet applications becomes a challenge. This is because the QoE perceived by a user of video services can be characterized by a staircase function of the data rate, which is nonconcave and hence it is "hard" to find the optimal operating point. The work in this paper aims at tackling this challenge. It considers the packet routing problem among multiple end points in packet switching networks based on a connectionless, hop-by-hop forwarding paradigm. We model this traffic allocation problem using a fluid flow model and let the link bandwidth be the only resource to be shared. To maximize the utilization of resources and avoid congestion, we formulate the problem as a network utility maximization problem. More precisely, the objective of this paper is to design a Fully Distributed Traffic Allocation Algorithm (FDTAA) that is applicable to a large class of nonconcave utility functions. Moreover, FDTAA runs in a fully distributed way: it enables each router to independently address and route each data unit using immediate local information in parallel, without referring to any global information of the communication network. FDTAA requires minimum computation workload, since the routing decision made at each router is solely based on the destination information carried in each unit. In addition, the network utility values corresponding to the FDTAA iterate sequence converge to the optimal network utility value at the rate of (1/K), where K is the iteration counter. These theoretical results are exemplified by the simulation performed on an example communication network.
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Affiliation(s)
- Jingyao Wang
- The Department of Automation, The Xiamen University, China
- The Shenzhen Research Institute of Xiamen University, China
| | - Mahmoud Ashour
- The Department of Electrical Engineering and Computer Science, The Pennsylvania State University, United States of America
| | - Constantino M. Lagoa
- The Department of Electrical Engineering and Computer Science, The Pennsylvania State University, United States of America
| | - Necdet Serhat Aybat
- The Department of Industrial Engineering, The Pennsylvania State University, United States of America
| | - Hao Che
- The Department of Computer Science and Engineering, The University of Texas at Arlington, United States of America
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18
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Fan Z, Che H, Yang S, Chen C. Estrogen and estrogen receptor signaling promotes allergic immune responses: Effects on immune cells, cytokines, and inflammatory factors involved in allergy. Allergol Immunopathol (Madr) 2019; 47:506-512. [PMID: 31248582 DOI: 10.1016/j.aller.2019.03.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 03/09/2019] [Accepted: 03/11/2019] [Indexed: 12/21/2022]
Abstract
Hypersensitivity occurs when the body is stimulated by an antigen, resulting in an immune response, and leads to a physiological disorder or abnormal tissue trauma. Various immune cells, cytokines, and inflammatory mediators are involved in the immune responses related to allergic diseases, which are the core of anaphylaxis. Estrogen receptors are widely distributed in immune cells, which combine with estrogen and participate in allergic responses by affecting immune cells, cytokines, and inflammatory factors. We aimed to summarize the association between estrogen and allergic reactions to provide a scientific basis for understanding and studying the mechanisms of allergic diseases.
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19
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Wang Y, Che H, Kang K, Zhao G, Li X, Che X, Xu M, Zhao L. Perinatal changes in estradiol and Ang II concentrations in pregnant women with pulmonary arterial hypertension and their correlation. Hypertens Pregnancy 2019; 38:163-170. [PMID: 31204528 DOI: 10.1080/10641955.2019.1625365] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Objective: This study aimed to analyze the perinatal changes of plasma estradiol (E2) and angiotensin II (Ang II) in pregnant women with pulmonary arterial hypertension before and after cesarean section. Methods: Depending on pulmonary arterial pressure, the subjects were divided into two groups, moderate group, and severe group. Plasma concentrations of E2 and Ang II were determined at different time points using electrochemiluminescence immunoassay and ELISA, respectively. The correlation between E2 and Ang II concentrations was analyzed. Results: Intragroup comparison indicated that E2 levels at different time points after surgery decreased in the two groups than before, with a greater reduction in the severe group. Besides, both groups showed a reduction in Ang II concentrations after surgery. As indicated by intragroup comparison, there was a significant difference at each time point in the two groups. The reduction in Ang II concentrations was more conspicuous at 48 h and 72 h after surgery (cesarean section) than before for the two groups. Moreover, E2 concentrations were correlated positively with AngII concentrations. Conclusion: Plasma concentrations of E2 and Ang II decreased after delivery. The plasma concentrations of E2 and Ang II were correlated with each other.
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Affiliation(s)
- Yanshuang Wang
- a Department of Anesthesiology , Beijing Obstetrics and Gynecology Hospital, Capital Medical University , Beijing , China
| | - Hao Che
- b Department of Anesthesiology , Beijing Anzhen Hospital China Capital Medical University , Beijing , China
| | - Kai Kang
- a Department of Anesthesiology , Beijing Obstetrics and Gynecology Hospital, Capital Medical University , Beijing , China
| | - Guosheng Zhao
- a Department of Anesthesiology , Beijing Obstetrics and Gynecology Hospital, Capital Medical University , Beijing , China
| | - Xiaoguang Li
- a Department of Anesthesiology , Beijing Obstetrics and Gynecology Hospital, Capital Medical University , Beijing , China
| | - Xiangming Che
- a Department of Anesthesiology , Beijing Obstetrics and Gynecology Hospital, Capital Medical University , Beijing , China
| | - Mingjun Xu
- a Department of Anesthesiology , Beijing Obstetrics and Gynecology Hospital, Capital Medical University , Beijing , China
| | - Liyun Zhao
- b Department of Anesthesiology , Beijing Anzhen Hospital China Capital Medical University , Beijing , China
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20
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Che H, Breuil V, Cortet B, Paccou J, Thomas T, Chapuis L, Debiais F, Mehsen-Cetre N, Javier RM, Loiseau Peres S, Roux C, Briot K. Vertebral fractures cascade: potential causes and risk factors. Osteoporos Int 2019; 30:555-563. [PMID: 30519756 DOI: 10.1007/s00198-018-4793-1] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 11/29/2018] [Indexed: 12/11/2022]
Abstract
UNLABELLED We performed a study to identify potential causes and risk factors of vertebral fracture cascade. Vertebral fracture cascade is a severe clinical event in patients with bone fragility. Only half of patients have an identified cause of secondary osteoporosis. INTRODUCTION Vertebral fracture (VF) is the most common osteoporotic fracture, and a strong risk factor of subsequent VFs leading to VF cascade (VFC). We prompted a study to identify potential causes and risk factors of VFC. METHODS VFC observations were collected retrospectively between January 2016 and April 2017. VFC was defined as an occurrence of at least three VFs within 1 year. RESULTS We included in 10 centers a total of 113 patients with VFC (79.6% of women, median age 73, median number of VFs in the cascade, 5). We observed 40.5% and 30.9% of patients with previous major fractures and a previous VF, respectively, and 68.6% with densitometric osteoporosis; 18.9% of patients were currently receiving oral glucocorticoids and 37.1% in the past. VFC was attributed by the physician to postmenopausal osteoporosis in 54% of patients. A secondary osteoporosis associated with the VFC was diagnosed in 52 patients: glucocorticoid-induced osteoporosis (25.7%), non-malignant hemopathies (6.2%), alcoholism (4.4%), use of aromatase inhibitors (3.6%), primary hyperparathyroidism (2.7%), hypercorticism (2.7%), anorexia nervosa (2.7%), and pregnancy and lactation-associated osteoporosis (1.8%). A total of 11.8% of cases were reported following a vertebroplasty procedure. A total of 31.5% patients previously received an anti-osteoporotic treatment. In six patients, VFC occurred early after discontinuation of an anti-osteoporotic treatment, in the year after the last dose effect was depleted: five after denosumab and one after odanacatib. CONCLUSION The results of this retrospective study showed that only half of VFC occurred in patients with a secondary cause of osteoporosis. Prospective studies are needed to further explore the determinants of this severe complication of osteoporosis.
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Affiliation(s)
- H Che
- Rheumatology Department, CHU Lapeyronie Montpellier, 371 avenue du Gaston Giraud, 34090, Montpellier, France.
| | - V Breuil
- Department of Rheumatology, BIAM - UMR E 4320 TIRO-MATOs CEA/UNS, Université Côte D'Azur, Centre Hospitalier Universitaire Nice, Nice, France
| | - B Cortet
- Service de rhumatologie, CHRU France et Université de Lille, Université Littoral Côte d'Opale, 59000 Lille, PMOI EA 4490 faculté de chirurgie dentaire, place de Verdun, 59000, Lille, France
| | - J Paccou
- Service de rhumatologie, CHRU France et Université de Lille, Université Littoral Côte d'Opale, 59000 Lille, PMOI EA 4490 faculté de chirurgie dentaire, place de Verdun, 59000, Lille, France
| | - T Thomas
- Rheumatology Department, CHU de Saint Etienne, INSERM U1059, Lab Biologie Intégrée du Tissu Osseux, Université de Lyon, 42055, Saint-Etienne Cedex 2, France
| | - L Chapuis
- Rheumatology Department, CH Simone Veil du Vitre, 30 route de Rennes, 35500, Vitre, France
| | - F Debiais
- Rheumatology Department, CHU La Miletrie Poitiers, 2 rue de la Miletrie, 86021, Poitiers Cedex, France
| | - N Mehsen-Cetre
- Rheumatology Department, CHU Pellegrin Bordeaux, Rue de la pelouse de Douet, 33000, Bordeaux, France
| | - R M Javier
- Rheumatology Department, Hôpitaux Universitaires de Strasbourg, 1 avenue Moliere, 67098, Strasbourg, France
| | - S Loiseau Peres
- Rheumatology Department, CHR Orléans, 14 avenue de l'Hopital, 45000, Orleans, France
| | - C Roux
- Rheumatology Department, INSERM 1153, CHU Paris Cochin, Paris Descartes University, 27 rue du Faubourg Saint-Jacques, 75014, Paris, France
| | - K Briot
- Rheumatology Department, INSERM 1153, CHU Paris Cochin, Paris Descartes University, 27 rue du Faubourg Saint-Jacques, 75014, Paris, France
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Lenaerts L, Vandenberghe P, Brison N, Che H, Neofytou M, Verheecke M, Leemans L, Maggen C, Dewaele B, Dehaspe L, Vanderschueren S, Dierickx D, Vandecaveye V, Amant F, Vermeesch J. Genomewide copy number alteration screening of circulating plasma DNA: potential for the detection of incipient tumors. Ann Oncol 2019; 30:85-95. [DOI: 10.1093/annonc/mdy476] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Szafors P, Che H, Barnetche T, Morel J, Gaujoux-Viala C, Combe B, Lukas C. Risk of fracture and low bone mineral density in adults with inflammatory bowel diseases. A systematic literature review with meta-analysis. Osteoporos Int 2018; 29:2389-2397. [PMID: 29909470 DOI: 10.1007/s00198-018-4586-6] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 05/22/2018] [Indexed: 12/20/2022]
Abstract
Inflammatory bowel diseases (IBDs) are associated with a decreased bone mineral density, but the impact on fractures is unknown. In our study, global risk of fracture is increased for patients with IBDs versus controls. This result will help to determine the appropriate assessment with early screening and management of osteoporosis. Inflammatory bowel diseases (IBDs), such as Crohn's disease (CD) and ulcerative colitis (UC), are associated with a decreased bone mineral density (BMD). However, the impact on fracture risk is unknown and data are contradictory across studies. In this systematic review and meta-analysis, we aimed to assess the risk of fracture and presence of low BMD in patients with IBDs compared to healthy controls. A systematic search of literature was conducted of MEDLINE, EMBASE, the Cochrane library and abstracts from appropriate scientific congresses. Studies were selected if they compared the incidence of fractures and/or BMD measurement by dual-energy X-ray absorptiometry in patients with IBDs and healthy sex- and age-matched controls. Data were extracted by two independent investigators. Meta-analysis was performed with the inverse variance approach to estimate pooled odds ratios (ORs) and risk ratios (RRs) with their 95% confidence intervals (CIs). Twenty-four studies met the inclusion criteria. On the basis of nine studies, global risk of fracture was increased for patients with IBDs versus controls (RR = 1.38, 95% CI 1.11-1.73; p = 0.005). Fracture risk with IBDs was significantly increased for vertebral fractures (OR = 2.26, 95% CI 1.04-4.90; p < 0.001), but not for any other site. The analysis of 16 studies evaluating BMD showed a significant decrease in mean BMD and Z-scores for IBD patients versus controls at all sites. In our meta-analysis, patients with IBDs have an increased risk of fractures, especially in the spine, and significant decreased BMD at all sites, which suggests the need for identifying high-risk individuals among this population.
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Affiliation(s)
- P Szafors
- Department of Rheumatology, Lapeyronie Hospital and University of Montpellier, Montpellier, France
| | - H Che
- Department of Rheumatology, Lapeyronie Hospital and University of Montpellier, Montpellier, France
| | - T Barnetche
- Department of Rheumatology, Lapeyronie Hospital and EA2415, University of Montpellier, Montpellier, France
| | - J Morel
- Department of Rheumatology, Lapeyronie Hospital and University of Montpellier, Montpellier, France
| | - C Gaujoux-Viala
- Department of Rheumatology, FHU ACRONIM, Pellegrin University Hospital, Bordeaux, France
| | - B Combe
- Department of Rheumatology, Lapeyronie Hospital and University of Montpellier, Montpellier, France
| | - C Lukas
- Department of Rheumatology, Nîmes University Hospital and EA2415, University of Montpellier, Nimes, France.
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Che H, Ruan YY, Luo TY, Chen MM. [The regulation of Na +/H + exchangers by Toll-like receptors under inflammation]. Sheng Li Xue Bao 2018; 70:521-530. [PMID: 30377691] [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: 06/08/2023]
Abstract
Toll-like receptors (TLRs) can be recognized and activated by different pathogen associated molecular patterns (PAMPs), which induce innate immune response and inflammation of the body. Na+/H+ exchangers (NHEs) not only play roles in the regulation of cellular pH and cell volume, maintenance of the cavity microenvironment and nutrients absorption, but also are related to cell proliferation, migration and apoptosis. The activity and membrane protein expression of NHEs are inhibited under the inflammation condition. It has been shown that the activation of TLR2 in colon epithelial cells can inhibit the activity of NHE1 through MyD88 independent pathway, which involves the recruitment of Src and the phosphorylation of PI3Ks. Other studies on intestinal macrophage showed long-term LPS stimulation can induce TLR4 activation through MyD88-dependent pathway (TLR4/MyD88/NF-κB) and induce inflammation and degeneration of intracellular NHE1, which leads to NHE1 activity inhibition. But short-term LPS exposure increases the activity and protein expression of NHE1. The activation of TLR5 increases the activity of NHE3. The activity and/or expression of NHE3 in intestinal macrophages in colitis patients and model animals were decreased. In renal tubular epithelial cells, basolateral LPS stimulation inhibits luminal NHE3 activation through TLR4/MyD88-dependent MAPK/ERK signaling pathway. And LPS stimulation on the lumen side activates TLR4/MyD88-dependent PI3K-AKT-mTOR signaling pathway, which results in the inhibition of NHE1 activity in basolateral side, and then affects the NHE3 function of the lumen side.
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Affiliation(s)
- Hao Che
- Medical School, Shaoxing University, Shaoxing 312000, China
| | - Yu-Yan Ruan
- Medical School, Shaoxing University, Shaoxing 312000, China
| | - Tang-Yan Luo
- Medical School, Shaoxing University, Shaoxing 312000, China
| | - Ming-Min Chen
- Medical School, Shaoxing University, Shaoxing 312000, China.
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Lenaerts L, Brison N, Neofytou M, Che H, Dehaspe L, Verheecke M, Maggen C, Dewaele B, Vanderschueren S, Vandecaveye V, Vandenberghe P, Vermeesch J, Amant F. Unbiased genomewide screening of circulating plasma DNA for cancer detection. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy294] [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: 11/14/2022] Open
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Mai B, Deng X, Xia X, Che H, Guo J, Liu X, Zhu J, Ling C. Column-integrated aerosol optical properties of coarse- and fine-mode particles over the Pearl River Delta region in China. Sci Total Environ 2018; 622-623:481-492. [PMID: 29220772 DOI: 10.1016/j.scitotenv.2017.11.348] [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] [Received: 08/09/2017] [Revised: 11/02/2017] [Accepted: 11/29/2017] [Indexed: 06/07/2023]
Abstract
The sun-photometer data from 2011 to 2013 at Panyu site (Panyu) and from 2007 to 2013 at Dongguan site (Dg) in the Pearl River Delta region, were used for the retrieving of the aerosol optical depth (AOD), single scattering albedo (SSA), Ångström exponent (AE) and volume size distribution of coarse- and fine-mode particles. The coarse-mode particles presented low AOD (ranging from 0.05±0.03 to 0.08±0.05) but a strong absorption property (SSA ranged from 0.70±0.03 to 0.90±0.02) for the wavelengths between 440 and 1020nm. However, these coarse particles accounted for <10% of the total particles. The AOD of fine particles (AODf) was over 3 times as large as that of coarse particles (AODc). The fine particles SSA (SSAf) generally decreased as a function of wavelength, and the relatively lower SSAf value in summer was likely to be due to the stronger solar radiation and higher temperature. More than 70% of the aerosols at Panyu site were dominated by fine-mode absorbing particles, whereas about 70% of the particles at Dg site were attributed to fine-mode scattering particles. The differences of the aerosol optical properties between the two sites are likely associated with local emissions of the light-absorbing carbonaceous aerosols and the scattering aerosols (e.g., sulfate and nitrate particles) caused by the gas-phase oxidation of gaseous precursors (e.g., SO2 and NO2). The size distribution exhibited bimodal structures in which the accumulation mode was predominant. The fine-mode volume showed positive dependence on AOD (500nm), and the growth of peak value of the fine-mode volume was higher than that of the coarse volume. Both the AOD and SSA increased with increasing relative humidity (RH), while the AE decreased with increasing RH. These correlations imply that the aerosol properties are greatly modified by condensation growth.
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Affiliation(s)
- B Mai
- Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction, China Meteorological Administration, Guangzhou 510640, China.
| | - X Deng
- Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction, China Meteorological Administration, Guangzhou 510640, China
| | - X Xia
- Laboratory for Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, CAS/School of Earth Sciences, University of Chinese Academy of Sciences, Beijing 100029, China
| | - H Che
- Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - J Guo
- Chinese Academy of Meteorological Sciences, Beijing 100081, China
| | - X Liu
- Guangzhou Meteorological Observatory, Guangzhou 511430, China
| | - J Zhu
- School of Atmospheric Physics, Nanjing University of Information Science and Technology, Jiangsu 210044, China
| | - C Ling
- Donguan Meteorological Bureau, Dongguan 523086, China
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Che H, Schiff C, Le G, Dorelli J, Giles B, Moore T. Quantifying the Effect of Non-Larmor Motion of Electrons on the Pressure Tensor. Phys Plasmas 2018; 25:032101. [PMID: 32905417 PMCID: PMC7473318 DOI: 10.1063/1.5016853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In space plasma, various effects of magnetic reconnection and turbulence cause the electron motion to significantly deviate from their Larmor orbits. Collectively these orbits affect the electron velocity distribution function and lead to the appearance of the "non-gyrotropic" elements in the pressure tensor. Quantification of this effect has important applications in space and laboratory plasma, one of which is tracing the electron diffusion region (EDR) of magnetic reconnection in space observations. Three different measures of agyrotropy of pressure tensor have previously been proposed, namely, A∅ e , Dng and Q. The multitude of contradictory measures has caused confusion within the community. We revisit the problem by considering the basic properties an agyrotropy measure should have. We show that A∅ e , Dng and Q are all defined based on the sum of the principle minors (i.e. the rotation invariant I 2) of the pressure tensor. We discuss in detail the problems of I 2-based measures and explain why they may produce ambiguous and biased results. We introduce a new measure AG constructed based on the determinant of the pressure tensor (i.e. the rotation invariant I 3) which does not suffer from the problems of I 2-based measures. We compare AG with other measures in 2 and 3-dimension particle-in-cell magnetic reconnection simulations, and show that AG can effectively trace the EDR of reconnection in both Harris and force-free current sheets. On the other hand, A∅ e does not show prominent peaks in the EDR and part of the separatrix in the force-free reconnection simulations, demonstrating that A∅ e does not measure all the non-gyrotropic effects in this case, and is not suitable for studying magnetic reconnection in more general situations other than Harris sheet reconnection.
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Affiliation(s)
- H Che
- University of Maryland, College Park, MD, 20742, USA
- NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA
| | - C Schiff
- NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA
| | - G Le
- NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA
| | - J Dorelli
- NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA
| | - B Giles
- NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA
| | - T Moore
- NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA
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Cheng L, He X, Che Y, Che H, Qian M. Osteogenesis-promoting activity of composites SBA-15 mesoporous particles carrying oxytocin in vitro and in vivo. J BIOL REG HOMEOS AG 2017; 31:157-162. [PMID: 28337886] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This study analyzes the performance of SBA-15 mesoporous particles carrying oxytocin (OT) in promoting osteogenesis in vitro and in vivo. The SBA-15 particles synthesized in the previous studies (about 30 μm in diameter and containing 10 nm deep pores) were loaded with the drug oxytocin and cultured with human osteosarcoma MG-63 cell line in vitro. The influence of particles on cell proliferation was studied. The level of the osteogenic marker (alkaline phosphatase and type I collagen) was measured. For in vivo studies, the connectivity defects of rabbit skull were prepared, and SBA-15 suspensions were regularly injected at the defect sites. The changes in the defect site calcium salt deposition were measured, and morphological changes were observed by microscopy. The material had to promote effect on osteogenesis-related indicators such as alkaline phosphatase and collagen I in bone sarcoma cell line MG-63. In vivo, the calcium salt deposition in OT/SBA-15 group was significantly higher than in the blank group. SBA-15 carriers appeared to persist in the region of the defect after the injection and release the drugs slowly, thus playing a more distinct role in promoting bone repair of local bone defects. The results showed that SBA-15 particles with OT could slow the release drugs and could help in promoting osteogenesis.
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Affiliation(s)
- L Cheng
- Department of Prosthodontics, School of Stomatology, Jilin University, Changchun, China
| | - X He
- Department of Prosthodontics, School of Stomatology, Jilin University, Changchun, China
| | - Y Che
- Department of Science and Education, School of Stomatology, Jilin University, Changchun, China
| | - H Che
- Department of Periodontics, School of Stomatology, Jilin University, Changchun, China
| | - M Qian
- Department of Prosthodontics, School of Stomatology, Jilin University, Changchun, China
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Feng J, Ge S, Zhang L, Che H, Liang C. Aortic dissection is associated with reduced polycystin-1 expression, an abnormality that leads to increased ERK phosphorylation in vascular smooth muscle cells. Eur J Histochem 2016; 60:2711. [PMID: 28076932 PMCID: PMC5381529 DOI: 10.4081/ejh.2016.2711] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 08/15/2016] [Revised: 11/21/2016] [Accepted: 11/21/2016] [Indexed: 12/17/2022] Open
Abstract
The vascular smooth muscle cell (VSMC) phenotypic switch is a key pathophysiological change in various cardiovascular diseases, such as aortic dissection (AD), with a high morbidity. Polycystin-1 (PC1) is significantly downregulated in the VSMCs of AD patients. PC1 is an integral membrane glycoprotein and kinase that regulates different biological processes, including cell proliferation, apoptosis, and cell polarity. However, the role of PC1 in intracellular signaling pathways remains poorly understood. In this study, PC1 downregulation in VSMCs promoted the expression of SM22α, ACTA2 and calponin 1 (CNN1) proteins. Furthermore, PC1 downregulation in VSMCs upregulated phospho-MEK, phospho-ERK and myc, but did not change phospho-JNK and phospho-p38. These findings suggest that the MEK/ERK/myc signaling pathway is involved in PC1-mediated human VSMC phenotypic switch. Opposite results were observed when an ERK inhibitor was used in VSMCs downregulated by PC1. When the C-terminal domain of PC1 (PC1 C-tail) was overexpressed in VSMCs, the expression levels of phosphor-ERK, myc, SM22α, ACTA2 and CNN1 proteins were downregulated. The group with the overexpressed mutant protein (S4166A) in the PC1 C-tail showed similar results to the group with the downregulated PC1 in VSMCs. These results suggest that the Ser at the 4166 site in PC1 is crucial in the PC1 mediated MEK/ERK/myc signaling pathway, which might be the key pathophysiological cause of AD.
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Affiliation(s)
- J Feng
- The First Affiliated Hospital of Anhui Medical University, Department of Cardiovascular Surgery.
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Blain H, Masud T, Dargent-Molina P, Martin F, Rosendahl E, van der Velde N, Bousquet J, Benetos A, Cooper C, Kanis J, Reginster J, Rizzoli R, Cortet B, Barbagallo M, Dreinhöfer K, Vellas B, Maggi S, Strandberg T, Alvarez M, Annweiler C, Bernard PL, Beswetherick N, Bischoff-Ferrari H, Bloch F, Boddaert J, Bonnefoy M, Bousson V, Bourdel-Marchasson I, Capisizu A, Che H, Clara J, Combe B, Delignieres D, Eklund P, Emmelot-Vonk M, Freiberger E, Gauvain JB, Goswami N, Guldemond N, Herrero Á, Joël ME, Jónsdóttir A, Kemoun G, Kiss I, Kolk H, Kowalski M, Krajcík Š, Kutsal Y, Lauretani F, Macijauskienė J, Mellingsæter M, Morel J, Mourey F, Nourashemi F, Nyakas C, Puisieux F, Rambourg P, Ramírez A, Rapp K, Rolland Y, Ryg J, Sahota O, Snoeijs S, Stephan Y, Thomas E, Todd C, Treml J, Adachi R, Agnusdei D, Body JJ, Breuil V, Bruyère O, Burckardt P, Cannata-Andia J, Carey J, Chan DC, Chapuis L, Chevalley T, Cohen-Solal M, Dawson-Hughes B, Dennison E, Devogelaer JP, Fardellone P, Féron JM, Perez A, Felsenberg D, Glueer C, Harvey N, Hiligsman M, Javaid M, Jörgensen N, Kendler D, Kraenzlin M, Laroche M, Legrand E, Leslie W, Lespessailles E, Lewiecki E, Nakamura T, Papaioannou A, Roux C, Silverman S, Henriquez M, Thomas T, Vasikaran S, Watts N, Weryha G. A comprehensive fracture prevention strategy in older adults: The European union geriatric medicine society (EUGMS) statement. Eur Geriatr Med 2016. [DOI: 10.1016/j.eurger.2016.04.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Audo R, Deckert V, Daien C, Che H, Elhmioui J, Pais de Barros JP, Lemaire S, Desrumaux C, Hahne M, Combe B, Lagrost L, Morel J. OP0212 Phospholipid Transfer Protein (PLTP): A Link between Inflammation and Lipids in Rheumatoid Arthritis? Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Che H, Souffir C, Molto A, Kolta S, Etcheto A, Richette P, Dougados M, Roux C, Briot K. THU0396 Visceral Adipose Tissue and Cardiovascular Risk in Spondyloarthritis: Results from The DESIR and COMOSPA Cohorts. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.1388] [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: 11/04/2022]
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Godoy P, Che H, Beech RN, Prichard RK. Characterization of Haemonchus contortus P-glycoprotein-16 and its interaction with the macrocyclic lactone anthelmintics. Mol Biochem Parasitol 2015; 204:11-5. [PMID: 26657092 DOI: 10.1016/j.molbiopara.2015.12.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 11/30/2015] [Accepted: 12/01/2015] [Indexed: 10/22/2022]
Abstract
Anthelmintic resistance in veterinary nematodes, including Haemonchus contortus, has become a limitation to maintaining high standards of animal health. Resistance in this parasite, to all drug families including the macrocyclic lactones (MLs) is a serious issue worldwide. Mechanisms of resistance to the MLs appear to be complex and to include the elimination of these compounds by ABC transporter-like proteins present in nematodes. In order to investigate the potential involvement of ABC transporters in ML resistance in H. contortus, we have characterized the functionality of the ABC transporter H. contortus P-glycoprotein-16 (Hco-PGP-16) expressed in mammalian cells. This has included a study of its interaction with different MLs, including the avermectins, abamectin (ABA) and ivermectin (IVM), and the milbemycin, moxidectin (MOX). Hco-PGP-16 transport activity was studied using the fluorophore Rhodamine 123 (Rho 123). Transfected cells expressing Hco-PGP-16 accumulated less than 50% of Rho 123 than control cells, suggesting an active transport of this tracer dye by Hco-PGP-16. The influence of the MLs on the Rho123 transport by Hco-PGP-16 was then investigated. A marked inhibition of Rho123 transport by ABA and IVM was observed. In contrast, MOX showed less effect on inhibition of Rho123 transport by Hco-PGP-16, and the inhibition was not saturable. The difference in the interaction of the avermectins and MOX with Hco-PGP-16 may help explain the slower rate of development of resistance to MOX compared with the avermectins in H. contortus.
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Affiliation(s)
- P Godoy
- Institute of Parasitology, Macdonald Campus, McGill University, 21,111 Lakeshore Road, Ste-Anne-de-Bellevue, H9 X3V9 QC, Canada
| | - H Che
- Institute of Parasitology, Macdonald Campus, McGill University, 21,111 Lakeshore Road, Ste-Anne-de-Bellevue, H9 X3V9 QC, Canada
| | - R N Beech
- Institute of Parasitology, Macdonald Campus, McGill University, 21,111 Lakeshore Road, Ste-Anne-de-Bellevue, H9 X3V9 QC, Canada
| | - R K Prichard
- Institute of Parasitology, Macdonald Campus, McGill University, 21,111 Lakeshore Road, Ste-Anne-de-Bellevue, H9 X3V9 QC, Canada.
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Che H, Etcheto A, Dernis E, Nataf H, Boumier P, Breuillard P, Durandin-Truffinet M, Fechtenbaum J, Gaud-Listrat V, Giraud B, Hudry C, Labatide-Alanore S, Le Devic P, Le Goux P, Lebrun A, Maheu E, Moura B, Nguyen M, Sacchi A, Ayral X, Blanchais A, Neveu S, Dougados M, Moltó A. Evaluation of collected outcome measures in axial spondyloarthritis in daily-care rheumatology settings: the experience of the RHEVER network. Clin Exp Rheumatol 2015; 33:851-857. [PMID: 26411931] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Accepted: 05/28/2015] [Indexed: 06/05/2023]
Abstract
OBJECTIVES Nowadays, the recommended measures for optimal monitoring of axial Spondyloarthritis (ax-SpA) disease activity are either BASDAI and CRP, or ASDAS-CRP. However, there could be a gap between recommendations and daily practice. We aimed to determine the measures collected by rheumatologists in an ax-SpA follow-up visit, and to determine the impact of a meeting (where rheumatologists reached a consensus on the measures to be collected) on the collection of such measures. METHODS A consensual meeting of a local network of 32 rheumatologists proposed, four months later, to report at least the BASDAI score in the medical file of every ax-SpA patient at every follow-up visit. An independent investigator reviewed the medical files of 10 consecutive patients per rheumatologist, seen twice during the year (e.g. before and after the meeting). The most frequently collected measures were assessed, and then, the frequency of collection before and after the meeting was compared. RESULTS A total of 456 medical files from 228 patients were reviewed. Treatment (>60%), CRP (51.3%) and total BASDAI (28.5%) were the most reported measures in medical files. Before/After the meeting, the frequencies of collected measures in medical files were 28.5%/51.7%, 51.3%/52.2%, 16.7%/31.6% and 0.9%/6.1% for BASDAI, CRP, BASDAI + CRP and ASDAS, respectively reaching a statistically significance for BASDAI, ASDAS and BASDAI+CRP (p<0.05). CONCLUSIONS This study revealed a low rate of systematic report of the recommended outcome measures in ax-SpA. However, it suggests that a consensual meeting involving practicing rheumatologists might be relevant to improve the implementation of such recommendations.
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Affiliation(s)
- H Che
- Hôpital Cochin, Assistance Publique, Hôpitaux de Paris, Département de Rhumatologie, Paris, and Hôpital Lapeyronie, Département de Rhumatologie, Montpellier, France.
| | - A Etcheto
- Hôpital Cochin, Assistance Publique, Hôpitaux de Paris, Département de Rhumatologie, Paris, France
| | - E Dernis
- Centre Hospitalier du Mans, Service de Rhumatologie, Le Mans, France
| | - H Nataf
- Private office, 57 boulevard du Marechal Juin, 78200 Mantes la Jolie, France
| | - P Boumier
- Polyclinique de Picardie, Service de Rhumatologie, Amiens, France
| | - P Breuillard
- Private office, 10 rue Claret, 95500 Gonesse, France
| | | | | | - V Gaud-Listrat
- Hôpital Cochin, Assistance Publique, Hôpitaux de Paris, Département de Rhumatologie, Paris; and Private office, 4 place Jules Ferry, 91240 St Michel sur Orge, France
| | - B Giraud
- Private office, 10 rue Henri Amodru, 91190 Gif sur Yvette, France
| | - C Hudry
- Private office, 5 square du Roule, 75008 Paris, France
| | | | - P Le Devic
- Private office, Cabinet Médical de l'Olivier, 2bis rue Stephanson, 78180 Montigny le Bretonneux, France
| | - P Le Goux
- Private office, 118, rue Jean Jaurès, 92800 Puteaux, France
| | - A Lebrun
- Private office, 5 square du Roule, 75008 Paris, France
| | - E Maheu
- Private office, 4 boulevard Beaumarchais, 75011 Paris, France
| | - B Moura
- Private office, 5 square du Roule, 75008 Paris, France
| | - M Nguyen
- Private office, 65 boulevard de Courcelles, 75008 Paris, France
| | - A Sacchi
- Hôpital François Quesnay, Service de Rhumatologie, Mantes la Jolie, France
| | - X Ayral
- Hôpital Cochin, Assistance Publique, Hôpitaux de Paris, Département de Rhumatologie, Paris, France
| | - A Blanchais
- Hôpital Cochin, Assistance Publique, Hôpitaux de Paris, Département de Rhumatologie, Paris, France
| | - S Neveu
- Hôpital Cochin, Assistance Publique, Hôpitaux de Paris, Département de Rhumatologie, Paris, France
| | - M Dougados
- Hôpital Cochin, Assistance Publique, Hôpitaux de Paris, Département de Rhumatologie, Paris; and INSERM (U1153), Clinical Epidemiology and Biostatistics, PRES Sorbonne Paris-Cité, France
| | - A Moltó
- Hôpital Cochin, Assistance Publique, Hôpitaux de Paris, Département de Rhumatologie, Paris; and INSERM (U1153), Clinical Epidemiology and Biostatistics, PRES Sorbonne Paris-Cité, France
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Che H, Combe B, Morel J, Meyer O, Cantagrel A, Gossec L, Lukas C. SAT0072 Performance of Patient Reported Outcomes in the Assessment of Rheumatoid Arthritis Disease Activity: The Experience of the Espoir Cohort. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.1568] [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: 11/03/2022]
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Che H, Roux C, Etcheto A, Rothenbuhler A, Kamenicky P, Linglart A, Briot K. THU0551 Quality of Life of Adults with X-Linked Hypophosphatemic Rickets. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.1565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Rooke K, Kruidenier L, Che H, Mander P, Swales C, Prinjha R, Oppermann U. AB0059 Chromatin Modifying Mechanisms in Macrophages Differ between Healthy Controls and Patients Wih Rheumatoid Arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4218] [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: 11/04/2022]
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Che H, Goldstein ML, Viñas AF. Bidirectional energy cascades and the origin of kinetic Alfvénic and whistler turbulence in the solar wind. Phys Rev Lett 2014; 112:061101. [PMID: 24580684 DOI: 10.1103/physrevlett.112.061101] [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] [Subscribe] [Scholar Register] [Received: 07/06/2013] [Indexed: 06/03/2023]
Abstract
The observed steep kinetic scale turbulence spectrum in the solar wind raises the question of how that turbulence originates. Observations of keV energetic electrons during solar quiet time suggest them as a possible source of free energy to drive kinetic turbulence. Using particle-in-cell simulations, we explore how the free energy released by an electron two-stream instability drives Weibel-like electromagnetic waves that excite wave-wave interactions. Consequently, both kinetic Alfvénic and whistler turbulence are excited that evolve through inverse and forward magnetic energy cascades.
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Affiliation(s)
- H Che
- NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771, USA
| | - M L Goldstein
- NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771, USA
| | - A F Viñas
- NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771, USA
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Che H, Morel J, Combe B, Lukas C. THU0368 Risk of herpes viruses infections (HSV,VZV) during anti-tnf therapy in patients with inflammatory rheumatic diseases. Systematic review and meta-analysis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2333] [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: 11/04/2022]
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Zhou C, Sun N, Wang J, Che H. Research Of The Allergenicity Evaluation System Of Recombinant Human Lactoferrin (rhLF) With BN Rats. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.719] [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: 10/14/2022]
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Sahaym U, Norton MG, Huso J, Morrison JL, Che H, Bergman L. Microstructure evolution and photoluminescence in nanocrystalline Mg(x)Zn(1 - x)O thin films. Nanotechnology 2011; 22:425706. [PMID: 21941034 DOI: 10.1088/0957-4484/22/42/425706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The effects of Mg concentration and annealing temperature on the characteristics of nanocrystalline Mg(x)Zn(1 - x)O thin films (where x = 0-0.4) were studied using electron microscopy and photoluminescence. The films were prepared by a sol-gel method. The solid solubility limit of MgO in ZnO for the sol-gel-derived Mg(x)Zn(1 - x)O films in the present study was determined to be ∼ 20 at.%. Microstructural characterization of the films showed that the wurtzite crystallites decrease in size with increase in Mg concentration up to the solubility limit. Increasing Mg concentration beyond the solubility limit resulted in a decrease in crystallinity of the films. The bandgap energy was found to increase with Mg concentration whereas the linewidth first increased and then decreased when the Mg concentration was increased beyond the solubility limit. Photoluminescence properties have been correlated to the microstructure of the films. A growth mechanism for Mg(x)Zn(1 - x)O nanocrystalline films under the present processing conditions has also been proposed.
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Affiliation(s)
- U Sahaym
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, USA.
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Goldman MV, Lapenta G, Newman DL, Markidis S, Che H. Jet deflection by very weak guide fields during magnetic reconnection. Phys Rev Lett 2011; 107:135001. [PMID: 22026861 DOI: 10.1103/physrevlett.107.135001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2010] [Indexed: 05/31/2023]
Abstract
Previous 2D simulations of reconnection using a standard model of initially antiparallel magnetic fields have detected electron jets outflowing from the x point into the ion outflow exhausts. Associated with these jets are extended "outer electron diffusion regions." New PIC simulations with an ion to electron mass ratio as large as 1836 (an H(+) plasma) now show that the jets are strongly deflected and the outer electron diffusion region is broken up by a very weak out-of-plane magnetic guide field, even though the diffusion rate itself is unchanged. Jet outflow and deflection are interpreted in terms of electron dynamics and are compared to recent measurements of jets in the presence of a small guide field in Earth's magnetosheath.
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Affiliation(s)
- M V Goldman
- Department of Physics and CIPS, University of Colorado, Boulder, 80309, USA
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Che H, Kim E, Kim B, Kim J, Chung C. Observations of interictal spike of epilepsy patients obtained from ECoG and MEG. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70730-x] [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: 11/16/2022] Open
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Che H, Drake JF, Swisdak M, Yoon PH. Nonlinear development of streaming instabilities in strongly magnetized plasma. Phys Rev Lett 2009; 102:145004. [PMID: 19392448 DOI: 10.1103/physrevlett.102.145004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2008] [Indexed: 05/27/2023]
Abstract
The nonlinear development of streaming instabilities in the current layers formed during magnetic reconnection with a guide field is explored. Theory and 3D particle-in-cell simulations reveal two distinct phases. First, the parallel Buneman instability grows and traps low velocity electrons. The remaining electrons then drive two forms of turbulence: the parallel electron-electron two-stream instability and the nearly perpendicular lower-hybrid instability. The high velocity electrons resonate with the turbulence and transfer momentum to the ions and low velocity electrons.
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Affiliation(s)
- H Che
- IREAP, Department of Physics, University of Maryland, College Park, Maryland 20742, USA
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Drake JF, Swisdak M, Che H, Shay MA. Electron acceleration from contracting magnetic islands during reconnection. Nature 2006; 443:553-6. [PMID: 17024088 DOI: 10.1038/nature05116] [Citation(s) in RCA: 690] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2005] [Accepted: 07/19/2006] [Indexed: 11/08/2022]
Abstract
A long-standing problem in the study of space and astrophysical plasmas is to explain the production of energetic electrons as magnetic fields 'reconnect' and release energy. In the Earth's magnetosphere, electron energies reach hundreds of thousands of electron volts (refs 1-3), whereas the typical electron energies associated with large-scale reconnection-driven flows are just a few electron volts. Recent observations further suggest that these energetic particles are produced in the region where the magnetic field reconnects. In solar flares, upwards of 50 per cent of the energy released can appear as energetic electrons. Here we show that electrons gain kinetic energy by reflecting from the ends of the contracting 'magnetic islands' that form as reconnection proceeds. The mechanism is analogous to the increase of energy of a ball reflecting between two converging walls--the ball gains energy with each bounce. The repetitive interaction of electrons with many islands allows large numbers to be efficiently accelerated to high energy. The back pressure of the energetic electrons throttles reconnection so that the electron energy gain is a large fraction of the released magnetic energy. The resultant energy spectra of electrons take the form of power laws with spectral indices that match the magnetospheric observations.
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Affiliation(s)
- J F Drake
- University of Maryland, College Park, Maryland 20742, USA.
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Che H, Luo K. Effects of huang qi wu wu decoction on plasma proteins in 70 cases of chronic pulmonary heart disease. J TRADIT CHIN MED 2000; 20:254-7. [PMID: 11263275] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Simple immune agar diffusion test was used to assay the contents of 12 plasma proteins in 70 cases of chronic pulmonary heart disease treated by Huang Qi Wu Wu Decoction ([symbol: see text]), with the other 70 cases who were not given Huang Qi Wu Wu Decoction as the control group. The total clinical effective rate in the treatment group was 90.0%, while that in the control group was 75.7%, with a statistically significant difference between the two groups (P < 0.05). In the treatment group, the levels of prealbumin, transferrin and fibronectin elevated obviously after treatment, and the contents of C-reactive protein, ceruloplasmin, haptoglobin, alpha 1-antitrypsin and alpha 1-acid glycoprotein decreased markedly (P < 0.01). In the control group, only the levels of ceruloplasmin and C-reactive protein decreased significantly (P < 0.05). It is shown that Huang Qi Wu Wu Decoction may enhance the therapeutic effects for pulmonary heart disease, regulate the metabolism of plasma proteins, and improve the life quality of the patients.
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Affiliation(s)
- H Che
- 463 PLA Hospital, Shenyang 110042, Liaoning Province
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Che H, Ma FM. Labelling efficiency of ten radiopharmaceuticals. Nucl Med Commun 2000; 21:1090-1. [PMID: 11192716 DOI: 10.1097/00006231-200011000-00017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Distributed optimal traffic engineering in the presence of multiple paths has been found to be a difficult problem to solve. In this paper, we introduce a new approach in an attempt to tackle this problem. This approach has its basis in nonlinear control theory. More precisely, it relies on the concept of Sliding Modes. We develop a family of control laws, each of them having the property that the steady-state network resource allocation yields the maximum of the given utility function, subject to the network resource constraints. These control laws not only allow each ingress node to independently adjust its traffic sending rate but also provide a scheme for optimal traffic load redistribution among multiple paths. The only nonlocal information needed is binary feedback from each congested node in the path. Moreover, the algorithms presented are applicable to a large class of utility functions, namely, utility functions that can be expressed as the sum of concave functions of the sending rates. We show that the technique can be applied not only to rate adaptive traffic with multiple paths, but also to assured service traffic with multiple paths. Preliminary case studies show that this technique is potentially very useful for optimal traffic engineering in a multiple-class-of-service and multiple-path enabled Internet, e.g., differentiated services enabled multi-protocol label switching networks.
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Affiliation(s)
| | - Hao Che
- Pennsylvania State University, University Park, PA
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Abstract
We report two cases of cryptococcal pneumonia in which the roentgenographic picture closely mimicked that for chronic eosinophilic pneumonia. Caution in use of corticosteriods based on this roentgenographic pattern is stressed.
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Affiliation(s)
- J C Starr
- Department of Internal Medicine, Scott & White Memorial Hospital and Clinic, Temple, TX 76508, USA
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Che H, Nigg BM, de Koning J. Relationship between plantar pressure distribution under the foot and insole comfort. Clin Biomech (Bristol, Avon) 1994; 9:335-41. [PMID: 23916351 DOI: 10.1016/0268-0033(94)90062-0] [Citation(s) in RCA: 101] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/1993] [Accepted: 11/04/1993] [Indexed: 02/07/2023]
Abstract
In this paper, four pairs of insoles with different comfort characteristics were used to investigate the relationship between the pressure distribution under the foot and running shoe comfort. Fourteen male subjects were tested in four insole conditions by walking and running on a treadmill. The pressure at the plantar surface of the foot was measured by using an EMED pressure-measuring insole. For walking there were significantly higher pressures and forces in the midfoot area and significantly lower pressures in the medial forefoot and hallux area by wearing the most comfortable insole compared with wearing the least comfortable insole. The shift of the pressure from forefoot to midfoot for the most comfortable insole provided an even distribution of the pressure at the plantar surface of the foot. The results also demonstrated that the path of centre of force at the plantar surface of the foot moved to the lateral aspect of the foot for the most comfortable insole. For running, only the pressure in the medial forefoot area was found significantly lower for the most comfortable insole than for the least comfortable insole. The results of this study indicated that the pressure distribution between the plantar surface of the foot and the shoe could detect the change of shoe comfort. Thus it is a suggestion that pressure measurement may be related to understand factors important for shoe comfort. Comfort of sport shoes is important for the appropriate execution of sport activities. Additionally, comfort may influence fatigue and possibly the development of injuries. The quantification of comfort of sport shoes and the understanding of mechanical and/or biological functions related to it may be enhanced with the use of pressure measurements between the plantar surface of the foot and the shoe sole.
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Affiliation(s)
- H Che
- Human Performance Laboratory, University of Calgary, Calgary, Alberta, Canada
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Lin DL, Che H, Lai W, George TF. Critical temperature of Ising films with cubic lattices. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1994; 49:2155-2160. [PMID: 9961458 DOI: 10.1103/physreve.49.2155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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