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Wang DP, Jiang FY, Zeng XY, Liu YJ, Zhao R, Wang MY, Luo J, Chen C, Zhu Y, Cao JM. Corrigendum to "Crystal structure of RNA helicase from Saint Louis encephalitis virus and discovery of its inhibitors" [Genes Dis 10 (2023) 389-392]. Genes Dis 2024; 11:101113. [PMID: 38292198 PMCID: PMC10825432 DOI: 10.1016/j.gendis.2023.101113] [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: 02/01/2024] Open
Abstract
[This corrects the article DOI: 10.1016/j.gendis.2022.07.001.].
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Affiliation(s)
- De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Fang-Ying Jiang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Xian-Yan Zeng
- College of Life Sciences, Chongqing Medical University, Chongqing 400016, China
| | - Yu-Jie Liu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Rong Zhao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Mei-Yue Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Jing Luo
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Chen Chen
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Yong Zhu
- College of Life Sciences, Chongqing Medical University, Chongqing 400016, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
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Wu LF, Zhou Y, Wang DP, Zhang JJ, Zheng ZF, Guo J, Shen J, Shi JY, Liu QH, Wang XN, Wang HX, Du WJ, Li ML, Cao JM. Nerve growth factor (Ngf) gene-driven semaphorin 3a (Sema3a) expression exacerbates thoracic aortic aneurysm dissection in mice. J Hypertens 2024; 42:816-827. [PMID: 38165021 DOI: 10.1097/hjh.0000000000003647] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Thoracic aortic aneurysm and dissection (TAAD) is a life-threatening disease and currently there is no pharmacological therapy. Sympathetic nerve overactivity plays an important role in the development of TAAD. Sympathetic innervation is mainly controlled by nerve growth factor (NGF, a key neural chemoattractant) and semaphoring 3A (Sema3A, a key neural chemorepellent), while the roles of these two factors in aortic sympathetic innervation and especially TAAD are unknown. We hypothesized that genetically manipulating the NGF/Sema3A ratio by the Ngf -driven Sema3a expression approach may reduce aortic sympathetic nerve innervation and mitigate TAAD progression. A mouse strain of Ngf gene-driven Sema3a expression (namely NgfSema3a/Sema3a mouse) was established by inserting the 2A-Sema3A expression frame to the Ngf terminating codon using CRISPR/Cas9 technology. TAAD was induced by β-aminopropionitrile monofumarate (BAPN) both in NgfSema3a/Sema3a mice and wild type (WT) littermates. Contrary to our expectation, the BAPN-induced TAAD was severer in NgfSema3a/Sema3a mice than in wild-type (WT) mice. In addition, NgfSema3a/Sema3a mice showed higher aortic sympathetic innervation, inflammation and extracellular matrix degradation than the WT mice after BAPN treatment. The aortic vascular smooth muscle cells isolated from NgfSema3a/Sema3a mice and pretreated with BAPN in vivo for two weeks showed stronger capabilities of proliferation and migration than that from the WT mice. We conclude that the strategy of Ngf -driven Sema3a expression cannot suppress but worsens the BAPN-induced TAAD. By investigating the aortic phenotype of NgfSema3a/Sema3a mouse strain, we unexpectedly find a path to exacerbate BAPN-induced TAAD which might be useful in future TAAD studies.
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Affiliation(s)
- Li-Fei Wu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education
- Department of Physiology, Shanxi Medical University
- Department of Pathophysiology, Shanxi Medical University
| | - Ying Zhou
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education
- Department of Physiology, Shanxi Medical University
| | - De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education
- Department of Physiology, Shanxi Medical University
| | - Jiao-Jiao Zhang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education
- Department of Physiology, Shanxi Medical University
| | - Zhi-Fa Zheng
- Department of Cardiovascular Surgery, Shanxi Bethune Hospital
| | - Jia Guo
- Center for Hypertension Care, Shanxi Medical University First Hospital
| | - Jing Shen
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education
- Department of Physiology, Shanxi Medical University
| | - Jian-Yun Shi
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education
- Department of Physiology, Shanxi Medical University
| | - Qing-Hua Liu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education
- Department of Pathophysiology, Shanxi Medical University
| | - Xue-Ning Wang
- Department of Cardiovascular Surgery, Shanxi Bethune Hospital
| | - Hai-Xiong Wang
- Department of Cardiology, Shanxi Cardiovascular Hospital, Taiyuan
| | - Wen-Jing Du
- State Key Laboratory of Medical Molecular Biology, Department of Cell Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing
| | - Miao-Ling Li
- Key Laboratory of Medical Electrophysiology at Southwest Medical University, Ministry of Education, and the Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education
- Department of Physiology, Shanxi Medical University
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Wang DP, Zhao R, Wang HF, Wang MY, Hu WS, Lin MM, Shu W, Sun YJ, Cao JM, Cui W, Zhou X. Crystal structure of mRNA cap (guanine-N7) methyltransferase E12 subunit from monkeypox virus and discovery of its inhibitors. Int J Biol Macromol 2023; 253:127565. [PMID: 37866584 DOI: 10.1016/j.ijbiomac.2023.127565] [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: 05/02/2023] [Revised: 09/12/2023] [Accepted: 10/18/2023] [Indexed: 10/24/2023]
Abstract
In July 2022, the World Health Organization announced monkeypox as a public health emergency of international concern (PHEIC), and over 85,000 global cases have been reported currently. However, preventive and therapeutic treatments for the monkeypox virus (MPXV) remain limited. MPXV mRNA cap N7 methyltransferase (MTase) is composed of two subunits (E1 C-terminal domain (E1CTD) and E12) which are essential for the replication of MPXV. Here, we solved a 2.16 Å crystal structure of E12. We also docked the D1CTD of the vaccinia virus (VACV) corresponding to the E1CTD in MPXV with E12 and found critical residues at their interface. These residues were further used for drug screening. After virtual screening, the top 347 compounds were screened out and a list of top 20 potential MPXV E12 inhibitors were discovered, including Rutin, Quercitrin, Epigallocatechin, Rosuvastatin, 5-hydroxy-L-Tryptophan, and Deferasirox, etc., which were potential E12 inhibitors. Taking the advantage of the previously unrecognized special structure of MPXV MTase composing of E1CTD and E12 heterodimer, we screened for inhibitors targeting MTase for the first time based on the interface between the heterodimer of MPXV MTase. Our study may provide insights into the development of anti-MPXV drugs.
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Affiliation(s)
- De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Rong Zhao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Hao-Feng Wang
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Mei-Yue Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Wen-Shu Hu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Meng-Meng Lin
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Wen Shu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Yao-Jun Sun
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, China.
| | - Wen Cui
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China.
| | - Xin Zhou
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, China.
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Wang DP, Zheng J, Jiang FY, Wu LF, Wang MY, Wang YL, Qin CY, Ning JY, Cao JM, Zhou X. Facile and green fabrication of tumor- and mitochondria-targeted AIEgen-protein nanoparticles for imaging-guided photodynamic cancer therapy. Acta Biomater 2023; 168:551-564. [PMID: 37414113 DOI: 10.1016/j.actbio.2023.06.048] [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: 12/28/2022] [Revised: 06/25/2023] [Accepted: 06/29/2023] [Indexed: 07/08/2023]
Abstract
In recent years, aggregation-induced emission (AIE)-active materials have been emerging as a promising means for bioimaging and phototherapy. However, the majority of AIE luminogens (AIEgens) need to be encapsulated into versatile nanocomposites to improve their biocompatibility and tumor targeting. Herein, we prepared a tumor- and mitochondria-targeted protein nanocage by the fusion of human H-chain ferritin (HFtn) with a tumor homing and penetrating peptide LinTT1 using genetic engineering technology. The LinTT1-HFtn could serve as a nanocarrier to encapsulate AIEgens via a simple pH-driven disassembly/reassembly process, thereby fabricating the dual-targeting AIEgen-protein nanoparticles (NPs). The as designed NPs exhibited an improved hepatoblastoma-homing property and tumor penetrating ability, which is favorable for tumor-targeted fluorescence imaging. The NPs also presented a mitochondria-targeting ability, and efficiently generated reactive oxygen species (ROS) upon visible light irradiation, making them valuable for inducing efficient mitochondrial dysfunction and intrinsic apoptosis in cancer cells. In vivo experiments demonstrated that the NPs could provide the accurate tumor imaging and dramatic tumor growth inhibition with minimal side effects. Taken together, this study presents a facile and green approach for fabrication of tumor- and mitochondria-targeted AIEgen-protein NPs, which can serve as a promising strategy for imaging-guided photodynamic cancer therapy. STATEMENT OF SIGNIFICANCE: AIE luminogens (AIEgens) show strong fluorescence and enhanced ROS generation in the aggregate state, which would facilitate the image-guided photodynamic therapy [12-14]. However, the major obstacles that hinder biological applications are their lack of hydrophilicity and selective targeting [15]. To address this issue, this study presents a facile and green approach for the fabrication of tumor‑ and mitochondria‑targeted AIEgen-protein nanoparticles via a simple disassembly/reassembly of the LinTT1 peptide-functionalized ferritin nanocage without any harmful chemicals or chemical modification. The targeting peptide-functionalized nanocage not only restricts the intramolecular motion of AIEgens leading to enhanced fluorescence and ROS production, but also confers good targeting to AIEgens.
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Affiliation(s)
- De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Jian Zheng
- Department of Breast Surgery, Shanxi Cancer Hospital, Taiyuan 030001, China
| | - Fang-Ying Jiang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Li-Fei Wu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Mei-Yue Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Yu-Lan Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Chuan-Yue Qin
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Jun-Ya Ning
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan 030001, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan 030001, China.
| | - Xin Zhou
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan 030001, China; Department of Medical Imaging, Shanxi Medical University, Taiyuan 030001, China.
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Wang MY, Zhao R, Wang YL, Wang DP, Cao JM. Challenges with the discovery of RNA-based therapeutics for flaviviruses. Expert Opin Drug Discov 2023; 18:371-383. [PMID: 36995192 DOI: 10.1080/17460441.2023.2195164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
INTRODUCTION Flaviviruses are emerging or reemerging pathogens that have caused several outbreaks throughout the world and pose serious threats on human health and economic development. RNA-based therapeutics are developing rapidly, and hold promise in the fight against flaviviruses. However, to develop efficient and safe therapeutics for flaviviruses, many challenges remain unsolved. AREAS COVERED In this review, the authors briefly introduced the biology of flaviviruses and the current advances in RNA-based therapeutics for them. Furthermore, the authors list the challenges and possible solutions in this area. Finally, the authors give their opinion on the development and future of RNA-based therapeutics for flaviviruses. EXPERT OPINION With the rapid development of structural biology, the crystal structures of flavivirus proteins may lay the foundation for future rational drug design. Studies regarding the interactions between the flavivirus and the host will also be invaluable to inhibitor design. Researchers should maintain the current momentum to bring about safe and effective anti-flavivirus drugs to licensure through joint efforts of academia, government, and industry.
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Affiliation(s)
- Mei-Yue Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Rong Zhao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Yu-Lan Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
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Wang DP, Jiang FY, Zeng XY, Liu YJ, Zhao R, Wang MY, Luo J, Chen C, Zhu Y, Cao JM. Crystal structure of RNA helicase from Saint Louis encephalitis virus and discovery of its inhibitors. Genes Dis 2023; 10:389-392. [PMID: 37223502 PMCID: PMC10201654 DOI: 10.1016/j.gendis.2022.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 07/16/2022] [Indexed: 10/16/2022] Open
Affiliation(s)
- De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Fang-Ying Jiang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Xian-Yan Zeng
- College of Life Sciences, Chongqing Medical University, Chongqing 400016, China
| | - Yu-Jie Liu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Rong Zhao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Mei-Yue Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Jing Luo
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Chen Chen
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Yong Zhu
- College of Life Sciences, Chongqing Medical University, Chongqing 400016, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
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Abstract
Coronavirus disease 2019 (COVID-19), caused by infection with the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), has escalated into a global tragedy afflicting human health, life, and social governance. Through the increasing depth of research and a better understanding of this disease, it has been ascertained that, in addition to the lungs, SARS-CoV-2 can also induce injuries to other organs including the liver. Liver injury is a common clinical manifestation of COVID-19, particularly in severe cases, and is often associated with a poorer prognosis and higher severity of COVID-19. This review focuses on the general existing information on liver injury caused by COVID-19, including risk factors and subpopulations of liver injury in COVID-19, the association between preexisting liver diseases and the severity of COVID-19, and the potential mechanisms by which SARS-CoV-2 affects the liver. This review may provide some useful information for the development of therapeutic and preventive strategies for COVID-19-associated liver injury.
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Affiliation(s)
- Wen-Shu Hu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
- Department of Physiology, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - Fang-Ying Jiang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
- Department of Physiology, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - Wen Shu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
- Department of Physiology, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - Rong Zhao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
- Department of Physiology, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
- Department of Physiology, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
| | - De-Ping Wang
- Department of Physiology, Shanxi Medical University, Taiyuan 030001, Shanxi Province, China
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Qi YH, Yang LZ, Zhou L, Gao LJ, Hou JY, Yan Z, Bi XG, Yan CP, Wang DP, Cao JM. Sympathetic nerve infiltration promotes stomach adenocarcinoma progression via norepinephrine/β2-adrenoceptor/YKL-40 signaling pathway. Heliyon 2022; 8:e12468. [PMID: 36593854 PMCID: PMC9803717 DOI: 10.1016/j.heliyon.2022.e12468] [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] [Received: 05/12/2022] [Revised: 08/13/2022] [Accepted: 12/12/2022] [Indexed: 12/24/2022] Open
Abstract
Objective This study aimed to address the status, role, and mechanism of sympathetic nerve infiltration in the progression of stomach adenocarcinoma (STAD). Methods Sympathetic nerve and its neurotransmitter NE, β-ARs, and associated signaling molecules in the STAD tissues and the adjacent tissues from 46 STAD patients were examined using immunostaining, HPLC, and western blotting. The effects and mechanisms of β2-AR activation on the proliferation, migration and invasion of AGS and SGC-7901 gastric cancer (GC) cell lines were examined using CCK-8, transwell, and western blotting assays. Correlations between genes and STAD survival were analyzed using bioinformatics. Results Striking sympathetic nerve infiltration, elevations of NGF, TrkA, GAP43, TH, S100, NE, β2-AR, YKL-40, syndecan-1, MMP9, CD206, and CD31 were observed in the STAD tissues compared to the adjacent tissues. Activation of β2-AR in the two GC cell lines significantly amplified the expressions of NGF, YKL-40, MMP9, syndecan-1, p-STAT3 and p-ERK, and increased GC cell proliferation, migration and invasion. Bioinformatic analyses revealed positive correlations of NGF, β2-AR, syndecan-1, and macrophage infiltration, respectively, with low survival of STAD, of β2-AR respectively with STAT3, ERK1/2 (MAPK1/3), YKL-40, MMP9, and syndecan-1, and of YKL-40 with MMP9. Conclusion Sympathetic nerves significantly infiltrated into human STAD tissues as a result of high NGF and TrkA expressions; elevated NE led to overactivation of β2-AR-STAT3/ERK-YKL-40 signaling pathway, and finally caused cancer cell growth and invasion, M2 macrophage infiltration, angiogenesis, matrix degradation and STAD metastasis and progression.
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Affiliation(s)
- Yue-Hong Qi
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, China,Department of Anesthesiology, Shanxi Provincial Peoples Hospital, Taiyuan, China
| | - Lu-Zi Yang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Lan Zhou
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Li-Juan Gao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Jia-Yi Hou
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Zi Yan
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Xiao-Gang Bi
- Department of Anesthesiology, Shanxi Provincial Peoples Hospital, Taiyuan, China
| | - Cai-Ping Yan
- Center of Translational Medicine, Shanxi Medical University, Taiyuan, China
| | - De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, China,Corresponding author.
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, And the Department of Physiology, Shanxi Medical University, Taiyuan, China,Corresponding author.
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Wang DP, Wang MY, Li YM, Shu W, Cui W, Jiang FY, Zhou X, Wang WM, Cao JM. Crystal structure of the Ilheus virus helicase: implications for enzyme function and drug design. Cell Biosci 2022; 12:44. [PMID: 35428322 PMCID: PMC9012436 DOI: 10.1186/s13578-022-00777-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 03/26/2022] [Indexed: 11/19/2022] Open
Abstract
Background The Ilheus virus (ILHV) is an encephalitis associated arthropod-borne flavivirus. It was first identified in Ilheus City in the northeast Brazil before spreading to a wider geographic range. No specific vaccines or drugs are currently available for the treatment of ILHV infections. The ILHV helicase, like other flavivirus helicases, possesses 5ʹ-triphosphatase activity. This allows it to perform ATP hydrolysis to generate energy as well as sustain double-stranded RNA’s unwinding during ILHV genome replication. Thus, ILHV helicase is an ideal target for inhibitor design. Results We determined the crystal structure of the ILHV helicase at 1.75-Å resolution. We then conducted molecular docking of ATP-Mn2+ to the ILHV helicase. Comparisons with related flavivirus helicases indicated that both the NTP and the RNA-ILHV helicase binding sites were conserved across intra-genus species. This suggested that ILHV helicase adopts an identical mode in recognizing ATP/Mn2+. However, the P-loop in the active site showed a distinctive conformation; reflecting a different local structural rearrangement. ILHV helicase enzymatic activity was also characterized. This was found to be relatively lower than that of the DENV, ZIKV, MVE, and ALSV helicases. Our structure-guided mutagenesis revealed that R26A, E110A, and Q280A greatly reduced the ATPase activities. Moreover, we docked two small molecule inhibitors of DENV helicase (ST-610 and suramin) to the ILHV helicase and found that these two molecules had the potential to inhibit the activity of ILHV helicase as well. Conclusion High-resolution ILHV helicase structural analysis demonstrates the key amino acids of ATPase activities and could be useful for the design of inhibitors targeting the helicase of ILHV. Supplementary Information The online version contains supplementary material available at 10.1186/s13578-022-00777-8.
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Li YY, Cao J, Li JL, Zhu JY, Li YM, Wang DP, Liu H, Yang HL, He YF, Hu LY, Zhao R, Zheng C, Zhang YB, Cao JM. Screening high-risk population of persistent postpartum hypertension in women with preeclampsia using latent class cluster analysis. BMC Pregnancy Childbirth 2022; 22:687. [PMID: 36068506 PMCID: PMC9446580 DOI: 10.1186/s12884-022-05003-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 08/25/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND A significant proportion of women with preeclampsia (PE) exhibit persistent postpartum hypertension (PHTN) at 3 months postpartum associated with cardiovascular morbidity. This study aimed to screen patients with PE to identify the high-risk population with persistent PHTN. METHODS This retrospective cohort study enrolled 1,000 PE patients with complete parturient and postpartum blood pressure (BP) profiles at 3 months postpartum. The enrolled patients exhibited new-onset hypertension after 20 weeks of pregnancy, while those with PE superimposed upon chronic hypertension were excluded. Latent class cluster analysis (LCCA), a method of unsupervised learning in machine learning, was performed to ascertain maternal exposure clusters from eight variables and 35 subordinate risk factors. Logistic regression was applied to calculate odds ratios (OR) indicating the association between clusters and PHTN. RESULTS The 1,000 participants were classified into three exposure clusters (subpopulations with similar characteristics) according to persistent PHTN development: high-risk cluster (31.2%), medium-risk cluster (36.8%), and low-risk cluster (32.0%). Among the 1,000 PE patients, a total of 134 (13.4%) were diagnosed with persistent PHTN, while the percentages of persistent PHTN were24.68%, 10.05%, and 6.25% in the high-, medium-, and low-risk clusters, respectively. Persistent PHTN in the high-risk cluster was nearly five times higher (OR, 4.915; 95% confidence interval (CI), 2.92-8.27) and three times (OR, 2.931; 95% CI, 1.91-4.49) than in the low- and medium-risk clusters, respectively. Persistent PHTN did not differ between the medium- and low-risk clusters. Subjects in the high-risk cluster were older and showed higher BP, poorer prenatal organ function, more adverse pregnancy events, and greater medication requirement than the other two groups. CONCLUSION Patients with PE can be classified into high-, medium-, and low-risk clusters according to persistent PHTN severity; each cluster has cognizable clinical features. This study's findings stress the importance of controlling persistent PHTN to prevent future cardiovascular disease.
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Affiliation(s)
- Yuan-Yuan Li
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China.,Department of Critical Care Medicine, The First Hospital of Shanxi Medical University, Taiyuan, China
| | - Jing Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Jia-Lei Li
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Jun-Yan Zhu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Yong-Mei Li
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Hong Liu
- Department of Critical Care Medicine, The First Hospital of Shanxi Medical University, Taiyuan, China
| | - Hai-Lan Yang
- Department of Maternity, The First Hospital of Shanxi Medical University, Taiyuan, China
| | - Yin-Fang He
- Department of Maternity, The First Hospital of Shanxi Medical University, Taiyuan, China
| | - Li-Yan Hu
- Department of Obstetrics Gynecology, Shanxi Children's Hospital and Women Health Center, Taiyuan, China
| | - Rui Zhao
- Department of Clinical Laboratory, Shanxi Children's Hospital and Women Health Center, Taiyuan, China
| | - Chu Zheng
- Division of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, China
| | - Yan-Bo Zhang
- Division of Health Statistics, School of Public Health, Shanxi Medical University, Taiyuan, China.
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Taiyuan, China. .,Department of Physiology, Shanxi Medical University, Taiyuan, China.
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11
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Wu LF, Wang DP, Shen J, Gao LJ, Zhou Y, Liu QH, Cao JM. Global profiling of protein lysine malonylation in mouse cardiac hypertrophy. J Proteomics 2022; 266:104667. [PMID: 35788409 DOI: 10.1016/j.jprot.2022.104667] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 03/25/2022] [Revised: 06/06/2022] [Accepted: 06/19/2022] [Indexed: 10/17/2022]
Abstract
Lysine malonylation, a novel identified protein posttranslational modification (PTM), is conservative and present in both eukaryotic and prokaryotic cells. Previous studies have reported that malonylation plays an important role in inflammation, angiogenesis, and diabetes. However, its potential role in cardiac remodeling remains unknown. Here, we observed a reduced lysine malonylation in hypertrophic mice hearts created by transverse aortic constriction (TAC) for 8 weeks. We also detected a decreased lysine malonylation in hypertrophic H9C2 cardiomyocytes induced by angiotensin II for 48 h. Using a proteomic method based on affinity purification and LC-MS/MS, we identified total 679 malonylated sites in 330 proteins in the hearts of sham mice and TAC mice. Bioinformatic analysis of the proteomic data revealed enrichment of malonylated proteins involved in cardiac structure and contraction, cGMP-PKG pathway, and metabolism. Specifically, we detected a decreased lysine malonylation in myocardial isocitrate dehydrogenase 2 (IDH2) by immunoprecipitation coupled with Western blotting both in vivo and in vitro. Together, our work suggests an important role and implication of protein lysine malonylation in cardiac hypertrophy, especially the IDH2. SIGNIFICANCE: Heart failure is the terminal stage of cardiac hypertrophy, which imposes an enormous clinical and economic burden worldwide. Despite our knowledge on the pathophysiology of the disease, current therapeutic approaches are still largely limited. Cardiac hypertrophy can be regulated at post-translational modifications (PTMs), and several PTMs have been reported in cardiac hypertrrophy and heart failure. In our study, we first reported a novel PTMs, lysine malonylation, in cardiac hypertophy. we found a reduced lysine malonylation in hypertrophic mice hearts in vivo and H9C2 cardiomyocytes after stimulating with angiotensinII for 48 h in vitro. Using affinity purification and LC-MS/MS, we identified 679 malonylated sites in 330 proteins in the hearts of sham and TAC mice. Compared to the sham group, 5 sites in 2 proteins were quantified as downregulated targets using a 2-fold threshold (downregulation <0.5-fold, P < 0.05). Functional analysis showed a significant enrichment in cardiac structure and contraction, cGMP-PKG pathway and metabolism. Notably, we identified a decreased Kmal level in isocitrate dehydrogenase 2 (IDH2), but the protein level of IDH2 has no changed in cardiac hypertrophy, These results highlight that lysine malonylation is associated with cardiac hypertrophy, and may be a new therapeutic target of the disease.
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Affiliation(s)
- Li-Fei Wu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China; Department of Pathophysiology, Shanxi Medical University, Taiyuan, China
| | - De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Jing Shen
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Li-Juan Gao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Ying Zhou
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Qing-Hua Liu
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China; Department of Pathophysiology, Shanxi Medical University, Taiyuan, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China.
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12
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Hou JY, Gao LJ, Shen J, Zhou L, Shi JY, Sun T, Hao SL, Wang DP, Cao JM. Crotonylation of PRKACA enhances PKA activity and promotes colorectal cancer development via the PKA-FAK-AKT pathway. Genes Dis 2022; 10:332-335. [DOI: 10.1016/j.gendis.2022.02.018] [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] [Received: 12/05/2021] [Revised: 01/21/2022] [Accepted: 02/22/2022] [Indexed: 10/18/2022] Open
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13
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Abstract
Crotonylation of proteins is a newly found type of post-translational modifications (PTMs) which occurs leadingly on the lysine residue, namely, lysine crotonylation (Kcr). Kcr is conserved and is regulated by a series of enzymes and co-enzymes including lysine crotonyltransferase (writer), lysine decrotonylase (eraser), certain YEATS proteins (reader), and crotonyl-coenzyme A (donor). Histone Kcr has been substantially studied since 2011, but the Kcr of non-histone proteins is just an emerging field since its finding in 2017. Recent advances in the identification and quantification of non-histone protein Kcr by mass spectrometry have increased our understanding of Kcr. In this review, we summarized the main proteomic characteristics of non-histone protein Kcr and discussed its biological functions, including gene transcription, DNA damage response, enzymes regulation, metabolic pathways, cell cycle, and localization of heterochromatin in cells. We further proposed the performance of non-histone protein Kcr in diseases and the prospect of Kcr manipulators as potential therapeutic candidates in the diseases.
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Affiliation(s)
- Jia-Yi Hou
- Key Laboratory of Cellular Physiology At Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, and the Department of Physiology, Shanxi Medical University, Taiyuan, China.,Department of Clinical Laboratory, Shanxi Provincial Academy of Traditional Chinese Medicine, Taiyuan, China
| | - Lan Zhou
- Key Laboratory of Cellular Physiology At Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Jia-Lei Li
- Key Laboratory of Cellular Physiology At Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - De-Ping Wang
- Key Laboratory of Cellular Physiology At Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology At Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, and the Department of Physiology, Shanxi Medical University, Taiyuan, China.
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14
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Wang MY, Zhao R, Gao LJ, Gao XF, Wang DP, Cao JM. SARS-CoV-2: Structure, Biology, and Structure-Based Therapeutics Development. Front Cell Infect Microbiol 2020; 10:587269. [PMID: 33324574 PMCID: PMC7723891 DOI: 10.3389/fcimb.2020.587269] [Citation(s) in RCA: 437] [Impact Index Per Article: 109.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 10/26/2020] [Indexed: 01/18/2023] Open
Abstract
The pandemic of the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been posing great threats to the world in many aspects. Effective therapeutic and preventive approaches including drugs and vaccines are still unavailable although they are in development. Comprehensive understandings on the life logic of SARS-CoV-2 and the interaction of the virus with hosts are fundamentally important in the fight against SARS-CoV-2. In this review, we briefly summarized the current advances in SARS-CoV-2 research, including the epidemic situation and epidemiological characteristics of the caused disease COVID-19. We further discussed the biology of SARS-CoV-2, including the origin, evolution, and receptor recognition mechanism of SARS-CoV-2. And particularly, we introduced the protein structures of SARS-CoV-2 and structure-based therapeutics development including antibodies, antiviral compounds, and vaccines, and indicated the limitations and perspectives of SARS-CoV-2 research. We wish the information provided by this review may be helpful to the global battle against SARS-CoV-2 infection.
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Affiliation(s)
| | | | | | | | - De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
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15
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Wang DP, Cai DY, Yang XL, Lu X, Lin DF, Li PM, Zhang ZM, Zhang YF, Zhang W. [Study of methylation of mitochondrial MT-COI of benzene poisoning]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2020; 38:664-668. [PMID: 33036528 DOI: 10.3760/cma.j.cn121094-20200409-00174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To research the mitochondrial cytochrome c oxidase subunit I (MT-COI) gene methylation levels in patients with occupational chronic benzene poisoning, and to explore effective molec μlar biomarkers in patients with occupational chronic benzene poisoning. Methods: 38 confirmed cases of occupational chronic benzene poisoning were selected in the case group. 46 healthy people who underwent physical in our hospital were selected in the control group. Pyrosequencing was used to detect the methylation sites of methylation sites, flow cytometry was used to detect peripheral blood cell count levels, and non-parametric statistical methods were used to analyze the differences in detection results between the two groups. Results: The methylation level of mitochondrial MT-COI site 1 (2.21±0.81) % in the case group was less than that in the control group, and the difference was statistically significant (P<0.05) . The methylation level of mitochondrial MT-COI site 2 (2.31±0.96%) in the case group was less than that in the control group, and the difference was statistically significant (P<0.05) . The methylation average level of mitochondrial MT-COI (2.26±0.75) % in the case group was less than that in the control group, and the difference was statistically significant (P<0.05) . Analysis of the average level of methylation found that the methylation level of mitochondrial MT-COI was correlated with WBC (P<0.05) . Analysis of the average level of methylation found that the methylation level of mitochondrial MT-COI was correlated with platelets (r=0.254、0.280, P<0.05) . Conclusion: The level of mitochondrial MT-COI gene methylation in patients with occupational chronic benzene poisoning may be related to the sensitivity to benzene exposure. Mitochondrial MT-COI gene methylation may serve as a potential predictive biomarker for benzene poisoning.
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Affiliation(s)
- D P Wang
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen 518001, China
| | - D Y Cai
- Hebei North University, Hebei 075000, China
| | - X L Yang
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen 518001, China
| | - X Lu
- Hebei North University, Hebei 075000, China
| | - D F Lin
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen 518001, China
| | - P M Li
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen 518001, China
| | - Z M Zhang
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen 518001, China
| | - Y F Zhang
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen 518001, China
| | - W Zhang
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen 518001, China
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16
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Liu YQ, Xue SM, Zhang P, Xu LN, Wang DP, Li G, Cao JM. Silica Nanoparticles Disturb Ion Channels and Transmembrane Potentials of Cardiomyocytes and Induce Lethal Arrhythmias in Mice. Int J Nanomedicine 2020; 15:7397-7413. [PMID: 33116478 PMCID: PMC7547143 DOI: 10.2147/ijn.s261692] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 09/08/2020] [Indexed: 12/22/2022] Open
Abstract
Background The toxicity of silica nanoparticles (SiNPs) on cardiac electrophysiology has seldom been evaluated. Methods Patch-clamp was used to investigate the acute effects of SiNP-100 (100 nm) and SiNP-20 (20 nm) on the transmembrane potentials (TMPs) and ion channels in cultured neonatal mouse ventricular myocytes. Calcium mobilization in vitro, cardiomyocyte ROS generation, and LDH leakage after exposure to SiNPs in vitro and in vivo were measured using a microplate reader. Surface electrocardiograms were recorded in adult mice to evaluate the arrhythmogenic effects of SiNPs in vivo. SiNP endocytosis was observed using transmission electron microscopy. Results Within 30 min, both SiNPs (10-8-10-6 g/mL) did not affect the resting potential and IK1 channels. SiNP-100 increased the action potential amplitude (APA) and the INa current density, but SiNP-20 decreased APA and INa density. SiNP-100 prolonged the action potential duration (APD) and decreased the Ito current density, while SiNP-20 prolonged or shortened the APD, depending on exposure concentrations and increased Ito density. Both SiNPs (10-6 g/mL) induced calcium mobilization but did not increase ROS and LDH levels and were not endocytosed within 10 min in cardiomyocytes in vitro. In vivo, SiNP-100 (4-10 mg/kg) and SiNP-20 (4-30 mg/kg) did not elevate myocardial ROS but increased LDH levels depending on dose and exposure time. The same higher dose of SiNPs (intravenously injected) induced tachyarrhythmias and lethal bradyarrhythmias within 90 min in adult mice. Conclusion SiNPs (i) exert rapid toxic effects on the TMPs of cardiomyocytes in vitro largely owing to their direct interfering effects on the INa and Ito channels and Ca2+ homeostasis but not IK1 channels and ROS levels, and (ii) induce tachyarrhythmias and lethal bradyarrhythmias in vivo. SiNP-100 is more toxic than SiNP-20 on cardiac electrophysiology, and the toxicity mechanism is likely more complicated in vivo.
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Affiliation(s)
- Ya-Qin Liu
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, Sichuan 646000, People's Republic of China
| | - Si-Meng Xue
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, Sichuan 646000, People's Republic of China
| | - Peng Zhang
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, Sichuan 646000, People's Republic of China
| | - Lin-Na Xu
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, Sichuan 646000, People's Republic of China
| | - De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, People's Republic of China
| | - Guang Li
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, Sichuan 646000, People's Republic of China
| | - Ji-Min Cao
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Southwest Medical University, Luzhou, Sichuan 646000, People's Republic of China.,Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, Shanxi 030001, People's Republic of China
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Wang DP, Yu ZX, He ZC, Liao JF, Shen XB, Zhu PL, Chen WN, Lin X, Xu SH. Apolipoprotein L1 is transcriptionally regulated by SP1, IRF1 and IRF2 in hepatoma cells. FEBS Lett 2020; 594:3108-3121. [PMID: 32671843 DOI: 10.1002/1873-3468.13887] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 06/21/2020] [Accepted: 07/05/2020] [Indexed: 11/07/2022]
Abstract
Apolipoprotein L1 (APOL1) participates in lipid metabolism. Here, we investigate the mechanisms regulating APOL1 gene expression in hepatoma cells. We demonstrate that the -80-nt to +31-nt region of the APOL1 promoter, which contains one SP transcription factor binding GT box and an interferon regulatory factor (IRF) binding ISRE element, maintains the maximum activity. Mutation of the GT box and ISRE element dramatically reduces APOL1 promoter activity. EMSA and chromatin immunoprecipitation assay reveal that the transcription factors Sp1, IRF1 and IRF2 could interact with their cognate binding sites on the APOL1 promoter. Overexpression of Sp1, IRF1 and IRF2 increases promoter activity, leading to increased APOL1 mRNA and protein levels, while knockdown of Sp1, IRF1 and IRF2 has the opposite effects. These results demonstrate that the APOL1 gene could be regulated by Sp1, IRF1 and IRF2 in hepatoma cells.
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Affiliation(s)
- De-Ping Wang
- Department of Medical Intensive Care Unit, Fujian Provincial Hospital, Provincial Clinical Medical College of Fujian Medical University, Fuzhou, China
- Key Laboratory of Gastrointestinal Cancer (Fujian Medical University), Ministry of Education, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
- Department of Endocrinology and Metabolism, Hongqi Hospital of MuDanJiang Medical College, Mudanjiang, China
| | - Zhao-Xi Yu
- Department of Medical Intensive Care Unit, Fujian Provincial Hospital, Provincial Clinical Medical College of Fujian Medical University, Fuzhou, China
| | - Zong-Cun He
- Key Laboratory of Gastrointestinal Cancer (Fujian Medical University), Ministry of Education, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Jin-Fu Liao
- Key Laboratory of Gastrointestinal Cancer (Fujian Medical University), Ministry of Education, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Xue-Bin Shen
- Key Laboratory of Gastrointestinal Cancer (Fujian Medical University), Ministry of Education, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
- Department of Cardiology, Affiliated Nanping First Hospital, Fujian Medical University, Nanping, China
| | - Peng-Li Zhu
- Department of Medical Intensive Care Unit, Fujian Provincial Hospital, Provincial Clinical Medical College of Fujian Medical University, Fuzhou, China
| | - Wan-Nan Chen
- Key Laboratory of Gastrointestinal Cancer (Fujian Medical University), Ministry of Education, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Xu Lin
- Key Laboratory of Gastrointestinal Cancer (Fujian Medical University), Ministry of Education, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Shang-Hua Xu
- Department of Cardiology, Affiliated Nanping First Hospital, Fujian Medical University, Nanping, China
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Gao LJ, Shen J, Ren YN, Shi JY, Wang DP, Cao JM. Discovering novel hub genes and pathways associated with the pathogenesis of psoriasis. Dermatol Ther 2020; 33:e13993. [PMID: 32648291 DOI: 10.1111/dth.13993] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 03/22/2020] [Revised: 06/06/2020] [Accepted: 06/28/2020] [Indexed: 12/13/2022]
Abstract
In-depth analysis on the rambling genes of psoriasis may help to identify the pathologic mechanism of this disease. However, this has seldom been performed. Using bioinformatic approaches, we analyzed four gene expression profiles in gene expression omnibus (GEO) database, identified the differentially expressed genes (DEGs), and found out the overlapping DEGs (common DEGs, CDEGs) in the above four profiles. The CDEGs were further subjected to Gene Ontology (GO) enrichment analysis, Kyoto encyclopedia of genes and genomes (KEGG) pathway analysis and protein-protein interaction (PPI) network analysis, and hub genes were ranked. We identified 139 CDEGs associated with a variety of GO processes including keratinization, immune and inflammatory responses, and type 1 interferon signaling pathway. These CDEGs were enriched in a variety of KEGG processes, including cytokine-cytokine receptor interaction and chemokine signaling. PPI analysis showed that seven genes (HERC6, ISG15, MX1, RSAD2, OAS2, OASL, and OAS3) were likely the novel hub genes of psoriasis. RT-qPCR identified that five (ISG15, MX1, OAS2, OASL, and OAS3) of the seven predicted hub genes were overexpressed in TNF-α stimulated HaCaT cell lines, a result quite consistent with the predictions. The study provides new information in exploring the mechanisms and therapeutic targets of psoriasis.
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Affiliation(s)
- Li-Juan Gao
- Department of Physiology, Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Shanxi Medical University, Taiyuan, China
| | - Jing Shen
- Department of Physiology, Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Shanxi Medical University, Taiyuan, China
| | - Ya-Nan Ren
- Department of Physiology, Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Shanxi Medical University, Taiyuan, China
| | - Jian-Yun Shi
- Department of Physiology, Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Shanxi Medical University, Taiyuan, China
| | - De-Ping Wang
- Department of Physiology, Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Shanxi Medical University, Taiyuan, China
| | - Ji-Min Cao
- Department of Physiology, Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Shanxi Medical University, Taiyuan, China
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Wang DP, Wang ZJ, Zhao R, Lin CX, Sun QY, Yan CP, Zhou X, Cao JM. Silica nanomaterials induce organ injuries by Ca 2+-ROS-initiated disruption of the endothelial barrier and triggering intravascular coagulation. Part Fibre Toxicol 2020; 17:12. [PMID: 32293491 PMCID: PMC7087393 DOI: 10.1186/s12989-020-00340-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 02/06/2020] [Indexed: 11/23/2022] Open
Abstract
Background The growing use of silica nanoparticles (SiNPs) in many fields raises human toxicity concerns. We studied the toxicity of SiNP-20 (particle diameter 20 nm) and SiNP-100 (100 nm) and the underlying mechanisms with a focus on the endothelium both in vitro and in vivo. Methods The study was conducted in cultured human umbilical vein endothelial cells (HUVECs) and adult female Balb/c mice using several techniques. Results In vitro, both SiNP-20 and SiNP-100 decreased the viability and damaged the plasma membrane of cultured HUVECs. The nanoparticles also inhibited HUVECs migration and tube formation in a concentration-dependent manner. Both SiNPs induced significant calcium mobilization and generation of reactive oxygen species (ROS), increased the phosphorylation of vascular endothelial (VE)-cadherin at the site of tyrosine 731 residue (pY731-VEC), decreased the expression of VE-cadherin expression, disrupted the junctional VE-cadherin continuity and induced F-actin re-assembly in HUVECs. The injuries were reversed by blocking Ca2+ release activated Ca2+ (CRAC) channels with YM58483 or by eliminating ROS with N-acetyl cysteine (NAC). In vivo, both SiNP-20 and SiNP-100 (i.v.) induced multiple organ injuries of Balb/c mice in a dose (range 7–35 mg/kg), particle size, and exposure time (4–72 h)-dependent manner. Heart injuries included coronary endothelial damage, erythrocyte adhesion to coronary intima and coronary coagulation. Abdominal aorta injury exhibited intimal neoplasm formation. Lung injuries were smaller pulmonary vein coagulation, bronchiolar epithelial edema and lumen oozing and narrowing. Liver injuries included multifocal necrosis and smaller hepatic vein congestion and coagulation. Kidney injuries involved glomerular congestion and swelling. Macrophage infiltration occurred in all of the observed organ tissues after SiNPs exposure. SiNPs also decreased VE-cadherin expression and altered VE-cadherin spatial distribution in multiple organ tissues in vivo. The largest SiNP (SiNP-100) and longest exposure time exerted the greatest toxicity both in vitro and in vivo. Conclusions SiNPs, administrated in vivo, induced multiple organ injuries, including endothelial damage, intravascular coagulation, and secondary inflammation. The injuries are likely caused by upstream Ca2+-ROS signaling and downstream VE-cadherin phosphorylation and destruction and F-actin remodeling. These changes led to endothelial barrier disruption and triggering of the contact coagulation pathway.
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Affiliation(s)
- De-Ping Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Zhao-Jun Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Rong Zhao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Cai-Xia Lin
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Qian-Yu Sun
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Cai-Ping Yan
- Center of Translational Medicine, Shanxi Medical University, Taiyuan, China
| | - Xin Zhou
- Department of Medical Imaging, Shanxi Medical University, Taiyuan, China.
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, and the Department of Physiology, Shanxi Medical University, Taiyuan, China.
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20
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Hu X, Wang DP, Xia XH, Chen YX, Liu HB, Gu ZQ. Pillared Graphene Sheets with High-Rate Performance as Anode Material for Lithium-Ion Batteries. J Nanosci Nanotechnol 2019; 19:7269-7277. [PMID: 31039885 DOI: 10.1166/jnn.2019.16623] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Pillared graphene composite (GP) is prepared by in situ polymerization and subsequent carbonization of graphene oxide (GO) and polyaniline (PANI) precursors. The interlayer spacing of GO layer can reach 1.418 nm with 200% increase compared with the original spacing of 0.706 nm by the intercalation of aniline monomer through π-π conjugate and electrostatic interactions. After carbonization, the graphene composite is reinforced by the intercalated PANI-converted carbon pillars and also has a nitrogen-doped level of ca. 4.49 atom%. Electrochemical characterization studies show that the GP composite exhibits a high reversible capacity of 653 mAh g-1 at a current density of 100 mA g-1 and an excellent rate capability (343 mAh g-1 at a current density of 1 A g-1), which are superior to graphene owing to the unique pillared and the nitrogen-doped structure.
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Affiliation(s)
- Xi Hu
- College of Materials Science and Engineering/Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
| | - De-Ping Wang
- College of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China
| | - Xiao-Hong Xia
- College of Materials Science and Engineering/Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
| | - Yu-Xi Chen
- College of Materials Science and Engineering/Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
| | - Hong-Bo Liu
- College of Materials Science and Engineering/Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
| | - Zhi-Qiang Gu
- College of Materials Science and Engineering/Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
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Cheng XL, Ding F, Wang DP, Zhou L, Cao JM. Hexarelin attenuates atherosclerosis via inhibiting LOX-1-NF-κB signaling pathway-mediated macrophage ox-LDL uptake in ApoE -/- mice. Peptides 2019; 121:170122. [PMID: 31386895 DOI: 10.1016/j.peptides.2019.170122] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 07/31/2019] [Accepted: 07/31/2019] [Indexed: 12/12/2022]
Abstract
Growth hormone secretagogues (GHS) have been proved to exert protective effects on the cardiovascular system, while their potential beneficial effects on macrophages in atherosclerosis (AS) are rarely been clarified. This study aimed to demonstrate whether hexarelin, a synthetic peptidyl GHS, can suppress AS progression via regulating the function of macrophages. AS was induced by chronic (3 months) feeding with high lipid diet in ApoE-/- mice. Mice were treated either with hexarelin (100 μg/kg s.c., q.d. for 3 months) (AS + Hex group) or saline (AS group). Age-matched C57BL/6 J mice were used as normal controls. AS and related signaling molecules in aortic tissues and RAW264.7 macrophages were identified with variant methods including histological staining, ELISA, western blotting, confocal microscopy and flow cytometry. AS significantly developed in ApoE-/- mice fed with high lipids diet. Hexarelin decreased serum TC, TG and LDL-c, increased serum HDL-c and attenuated the formation of atherosclerotic plaques and neointima compared with the AS group. Hexarelin decreased the aortic expressions of CD68 and LOX-1 which were elevated in the AS group. Hexarelin increased GHSR expression, suppressed ox-LDL uptake and LOX-1 expression and inhibited nuclear factor-kappa B (NF-κB) activation both in the aorta of ApoE-/- mice and in RAW264.7 macrophages. We conclude that hexarelin effectively attenuates AS progression in ApoE-/- mice by modulating circulatory lipids profile and inhibiting macrophage ox-LDL uptake via suppressing the LOX-1-NF-κB signaling pathway. The study supports the perspective of hexarelin as an anti-AS drug.
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MESH Headings
- Animals
- Antigens, CD/genetics
- Antigens, CD/metabolism
- Antigens, Differentiation, Myelomonocytic/genetics
- Antigens, Differentiation, Myelomonocytic/metabolism
- Aorta/drug effects
- Aorta/metabolism
- Aorta/pathology
- Apolipoproteins E/deficiency
- Apolipoproteins E/genetics
- Atherosclerosis/drug therapy
- Atherosclerosis/etiology
- Atherosclerosis/genetics
- Atherosclerosis/metabolism
- Biological Transport/drug effects
- Cholesterol, HDL/blood
- Cholesterol, LDL/blood
- Diet, High-Fat/adverse effects
- Disease Models, Animal
- Gene Expression Regulation
- Lipoproteins, LDL/metabolism
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- NF-kappa B/antagonists & inhibitors
- NF-kappa B/genetics
- NF-kappa B/metabolism
- Oligopeptides/pharmacology
- Plaque, Atherosclerotic/drug therapy
- Plaque, Atherosclerotic/etiology
- Plaque, Atherosclerotic/genetics
- Plaque, Atherosclerotic/metabolism
- RAW 264.7 Cells
- Receptors, Ghrelin/genetics
- Receptors, Ghrelin/metabolism
- Scavenger Receptors, Class E/antagonists & inhibitors
- Scavenger Receptors, Class E/genetics
- Scavenger Receptors, Class E/metabolism
- Signal Transduction
- Triglycerides/blood
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Affiliation(s)
- Xiu-Li Cheng
- Department of Clinical Laboratory, Tianjin Key Laboratory of Cerebral Vessels and Neural Degeneration, Tianjin Huanhu Hospital, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, China
| | - Fan Ding
- Office of Scientific R&D, Tsinghua University, Beijing, China
| | - De-Ping Wang
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Lan Zhou
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, Department of Physiology, Shanxi Medical University, Taiyuan, China.
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22
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Lin DF, Yang YH, Wang DP, Li PM, Zhang ZM, Zhang YF, Huang XQ. [Detection of HLA-B*13:01 gene by dual allele-specific real-time polymerase chain reaction in patients with trichlorethylene-induced dermatitis]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2018; 35:589-591. [PMID: 29081127 DOI: 10.3760/cma.j.issn.1001-9391.2017.08.008] [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: 11/05/2022]
Abstract
Objective: To investigate the detection of a human leukocyte antigen-B (HLA-B) allele HLA-B*13:01 by dual allele-specific real-time polymerase chain reaction (PCR) in patients with trichlorethylene-induced dermatitis. Methods: A total of 20 patients with trichlorethylene-induced dermatitis who were admitted and treated from January 2014 to October 2016 were enrolled as case group, and 20 persons who underwent physical examination from January to October, 2016 were enrolled as control group. Peripheral cubital venous blood samples were collected from all subjects, and dual allele-specific real-time PCR was used to detect the HLA-B*13:01 gene. The two groups were compared in terms of the proportion of subjects carrying HLA-B*13:01 gene. Results: There were no significant differences between the case group and the control group in median age (25.0 years vs 27.0 years, Z=0.30, P>0.05) and the proportion of male subjects (60.0% vs 70.0%, χ(2)=0.44, P>0.05) . The mean time of exposure to trichloroethylene was 30.8 days in the case group, while the subjects in the control group were not exposed to trichloroethylene. The case group had a significantly higher frequency of HLA-B*13:01 gene than the control group (80.0% vs 20.0%, χ(2)=14.40, P<0.01) with an odds ratio of 16.00. Conclusion: Dual allele-specific real-time PCR can be used for detection of the HLA-B*13:01 gene in patients with trichlorethylene-induced dermatitis.
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Affiliation(s)
- D F Lin
- Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen 518020, China
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23
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Fan LL, Chen X, Zou ZL, Wang DP, Zhang AH. [Effects of sodium arsenite exposure on activation and extracellular matrix secretion of human hepatic stellate cells]. Zhonghua Yu Fang Yi Xue Za Zhi 2018; 52:983-987. [PMID: 30392314 DOI: 10.3760/cma.j.issn.0253-9624.2018.10.004] [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: 11/05/2022]
Abstract
Objective: To explore the effects of sodium arsenite (NaAsO(2)) exposure on the activation and extracellular matrix secretion of human hepatic stellate cells, and to provide a theoretical basis for the mechanism study of arsenic induced hepatic fibrosis. Methods: Different doses of NaAsO(2) (0.0, 0.1, 1.0, 10.0, 50.0, 100.0 μmol/L) were exposed to human hepatic stellate cell line (Lx-2) for 24, 48 and 72 huors. CCK-8 assay was used to measure cell viability and IC(50) of NaAsO(2) on Lx-2 was then calculated; According to IC(50) results, 0.000, 1.875, 3.750, 7.500, and 15.000 μmol/L of NaAsO(2) were exposed to Lx-2 cells for 24 hours, besides, 7.500 μmol/L of NaAsO(2) was exposed to Lx-2 cells for 0, 12, 24, 48, and 72 hours, then collected cells and culture supernatant; HSC activation-related protein, including α-smooth muscle actin (α-SMA), and transforming growth factor-β1 (TGF-β1) expression levels were detected by Western blot analysis, the main extracellular matrix including laminin (LN) , hyaluronic acid (HA), collagen Ⅳ (COL-Ⅳ) and procollagen Ⅲ(P Ⅲ NP) secretion level was detected by Elisa assay. Results: CCK-8 assay showed that the cell viability of Lx-2 cells were increased obviously at low doses (≤1.0 μmol/L) of arsenic exposure, especially at 48 and 72 h. In contrast, with the increasing doses of arsenic exposure, the survival rate of Lx-2 cell was decreased gradually, and the survival rate of the high-dose (50, 100 μmol/L) arsenic exposure group at 24, 48 and 72 h were significantly lower than 0.0 μmol/L group, P<0.05. The IC(50) of NaAsO(2) on Lx-2 cells at 24, 48, 72 h were calculated as 72.75, 48.19 and 29.95 μmol/L, respectively; The expression levels of HSC activation-related protein showed that, after treated with 1.875, 3.750, 7.500, 15.000 μmol/L NaAsO(2) for 24 h, α-SMA and TGF-β1 protein level were higher than 0.000 μmol/L group. The increased expression of α-SMA and TGF-β1 protein were most significant in 7.500 μmol/L NaAsO(2) group (P<0.05). In addition, the expression levels of α-SMA and TGF-β1 also showed a time-dependent increasing in Lx-2 cells after treated with 7.500 μmol/L NaAsO(2) for 0, 12, 24, 48 and 72 h; Elisa assay showed that after treated with 1.875, 3.750, 7.500, 15.000 μmol/L NaAsO(2) for 24 h, the secretion levels of HA, LN, COL-Ⅳ and PⅢNP were obvious higher than 0.000 μmol/L group (P<0.05). Moreover, the secretion levels of HA, LN, COL-Ⅳ and P Ⅲ NP also showed a time-dependent increased manner in Lx-2 cells after exposed to 7.500 μmol/L NaAsO(2) for 0, 12, 24, 48 and 72 h (P<0.05). Conclusion: NaAsO(2) exposure to Lx-2 cells can upregulate the expression level of HSC activation-related proteins, induce its further activation, then increase ECM secretion level.
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Affiliation(s)
- L L Fan
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Department of Toxicology, Guizhou Medical University, Guiyang 550025, China
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Zhang AH, Wang DP. [Enhancing risk assessment of environmental arsenic pollution on human health]. Zhonghua Yu Fang Yi Xue Za Zhi 2018; 52:969-972. [PMID: 30392311 DOI: 10.3760/cma.j.issn.0253-9624.2018.10.001] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- A H Zhang
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education/Department of Toxicology, Guizhou Medical University, Guiyang 550025, China
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25
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Dai XY, Chen C, Wang DP, Zhang AH, Liu QZ. [Hypoxia-inducible factor-1α is involved in arsenite-induced epithelial-mesenchymal transition and malignant transformation of human liver epithelial cells via regulating Snail]. Zhonghua Yu Fang Yi Xue Za Zhi 2018; 52:988-993. [PMID: 30392315 DOI: 10.3760/cma.j.issn.0253-9624.2018.10.005] [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: 11/05/2022]
Abstract
Objective: To investigate the role of hypoxia-inducible factor-1α (HIF-1α) in arsenite-induced epithelial-mesenchymal transition (EMT) and malignant transformation of human liver epithelial cells (L-02 cells). Methods: After the L-02 cells were chronic treated with 2.0 μmol/L NaAsO(2) for 0 (reference), 10, 20, or 30 passages, con siRNA or HIF-1α siRNA was transfected into arsenite-transformed L-02 (T-L-02) cells by lipofectamine(TM)2000 and were set as T-L-02+con siRNA group and T-L-02+HIF-1α siRNA group as well as L-02 group and T-L-02 group, EMT index and levels of HIF-1α were detected by western blots. The reporter assays were performed to determine if HIF-1α directly regulate Snail transcriptional activity, and soft agar colony formation and Transwell assay were used to detect the malignancy, invasion, and migration ability of cells. Results: When L-02 cells were treated for 10 generations with 2 μmol/L NaAsO(2), relative expressions of E-cadherin were gradually increased compared to control cells, while the levels of N-cadherin, Snail, and HIF-1α were gradually increased in the L-02 cells compared to control cells, showing the longer the treatment time was, the more obvious the change was (P<0.05) . Down regulating the level of HIF-1α by siNRA caused E-cadherin levels to rise compared to T-L-02 group, while the levels of N-cadherin and Snail fall back compared to T-L-02 group (P<0.05) . Double luciferase reporter gene assays showed that HIF-1α directly targeted Snail to regulate its expression. Soft agar colony formation and Transwell assays showed that the numbers of formed colonies, invasion cells, and metastasis cells of cells in T-L-02 group were all lower than those in L-02 group (P<0.05) . Conclusion: HIF-1α is involved in arsenite-induced EMT and malignant transformation of human liver epithelial cells via regulating Snail.
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Affiliation(s)
- X Y Dai
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
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Wang DP, Gu LL, Xue Q, Chen H, Mao GX. CtBP2 promotes proliferation and reduces drug sensitivity in non-small cell lung cancer via the Wnt/β-catenin pathway. Neoplasma 2018; 65:888-897. [PMID: 30334447 DOI: 10.4149/neo_2018_171220n828] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 03/21/2018] [Indexed: 11/08/2022]
Abstract
The C-terminal binding protein 2 (CtBP2) is crucial for the activation of the Wnt/β-catenin pathway and regulates significant cellular processes in multiple cancer cells. However, the role of CtBP2 in non-small cell lung cancer (NSCLC) remains uncertain. Our western blotting and immunohistochemistry assays revealed that CtBP2 expression was obviously increased in NSCLC tissues and cells. In addition, the chi-square test and Kaplan-Meier analysis showed that over-expression of CtBP2 correlates with more invasive tumor phenotype and poor prognosis. In vitro studies with serum starvation-refeeding and CtBP2-shRNA transfection assay demonstrated that CtBP2 expression facilitates NSCLC cell proliferation and reduces sensitivity to cis-diamminedichloroplatinum (CDDP). The possible signaling transduction pathways were investigated, and the immunoprecipitation assay revealed that CtBP2 interacts directly with DvL1. Depletion of CtBP2 resulted in inhibited DvL1 expression and decreased expression of downstream genes. Moreover, our study showed that CtBP2 knockdown enhanced NSCLC cell sensitivity to CDDP through inhibition of the Wnt/β-catenin pathway. These results suggest that CtBP2 plays a crucial role in NSCLC progression and CDDP sensitivity, and that CtBP2 depletion can provide a new target for NSCLC treatment.
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Affiliation(s)
- D P Wang
- Department of Oncology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - L L Gu
- Department of Oncology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - Q Xue
- Department of Thoracic Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - H Chen
- Department of Oncology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - G X Mao
- Department of Oncology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
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He HZ, Zhang T, Zhou J, Wang DP, Wang HJ, Song Y, Zhu Z, Wang PY, Liu AP. [Relationship between sugary drinks and diabetes of adults in Wuhai city]. Beijing Da Xue Xue Bao Yi Xue Ban 2018; 50:469-473. [PMID: 29930415] [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
OBJECTIVE To explore the relationship between sugary drinks and diabetes of adults in Wuhai city. METHODS A multiple stage stratified cluster sampling was conducted on 8 131 residents who were between 35 and 79 years by cross-sectional study in Wuhai city. Questionnaires, physical measurements and laboratory tests were used to collect information on demographic information, dietary behavior, health status, blood glucose indicators. Besides, other covariate information was also collected by these ways. The analysis was carried out by chi-square test, trend chi-square test and multifactor Logistic regression. RESULTS The detection rates of impaired fasting glucose and diabetes of people who were 35 years old and above in Wuhai city were 6.0% and 18.4%, respectively, and they both increased with age (P<0.01, P< 0.01). The detection rates of impaired fasting glucose and diabetes of the men were both far higher than the women (P< 0.01, P< 0.01). For the men, the detection rate of diabetes increased with age (Ptrend<0.01), but for the women, and the detection rate of impaired fasting glucose and diabetes both increased with age (Ptrend<0.01, Ptrend<0.01). The consumption rate of sugary drinks of the people who were 35 years old and above in Wuhai city was 30.2%. And after all the subjects were classified into three groups, A (0- mL/d), B (16- mL/d), and C (237- mL/d) according to the daily different drinking quantities, statistical results found that group A accounted for 75.4%, group B for 21.5%, and group C for 3.1%. In group A, for comparison, the impaired fasting glucose OR values of group B and group C were 1.4 and 2.2, respectively. And diabetes OR values of group B and group C were 1.2 and 2.1 respectively compared with group A, and the trend of OR values increased both had statistical significance (Ptrend <0.01, Ptrend < 0.01). Also, after adjusting for other covariates in multifactor Logistic regression, the OR values of impaired fasting glucose in group B and group C were 1.6 and 3.8 respectively, and the OR values of diabetes were 1.9 and 4.9 respectively, compared with group A, and besides, the trend of OR values increased both still had statistical significance (Ptrend <0.01, Ptrend < 0.01). CONCLUSION Increased consumption of sugary drinks will increase the risk of impaired fasting glucose and diabetes. Residents in Wuhai city should control their consumption of sugary drinks.
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Affiliation(s)
- H Z He
- Department of Social Medicine and Health Education, Peking University School of Public Health, Beijing 100191, China
| | - T Zhang
- Department of Social Medicine and Health Education, Peking University School of Public Health, Beijing 100191, China
| | - J Zhou
- Department of Social Medicine and Health Education, Peking University School of Public Health, Beijing 100191, China
| | - D P Wang
- Center for Disease Control and Prevention of Wuhai City, Wuhai 016000, Inner Mongolia, China
| | - H J Wang
- Center for Disease Control and Prevention of Wuhai City, Wuhai 016000, Inner Mongolia, China
| | - Y Song
- Center for Disease Control and Prevention of Wuhai City, Wuhai 016000, Inner Mongolia, China
| | - Z Zhu
- Department of Social Medicine and Health Education, Peking University School of Public Health, Beijing 100191, China
| | - P Y Wang
- Department of Social Medicine and Health Education, Peking University School of Public Health, Beijing 100191, China
| | - A P Liu
- Department of Social Medicine and Health Education, Peking University School of Public Health, Beijing 100191, China
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Yang L, Xin EY, Liao B, Lai LJ, Han M, Wang XP, Ju WQ, Wang DP, Guo ZY, He XS. Development and Validation of a Nomogram for Predicting Incidence of Early Allograft Dysfunction Following Liver Transplantation. Transplant Proc 2018; 49:1357-1363. [PMID: 28736007 DOI: 10.1016/j.transproceed.2017.03.083] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 03/15/2017] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Early allograft dysfunction (EAD) is frequent complication post-liver transplantation and is closely related to recipient's mortality and morbidity. We sought to develop a nomogram for predicting incidence of EAD. METHODS Based on multivariate analysis of donor, recipient, and operation data of 199 liver transplants from deceased donors between 2013 and 2015, we identified 5 significant risk factors for EAD to build a nomogram. The model was subjected to prospective validation with a cohort of 42 patients who was recruited between January and June 2016. The predictive accuracy and discriminative ability were measured by area under the receiver operating characteristic curve (AUC). The agreement between nomogram prediction and actual observation was showed by the calibration curve. RESULTS Incidence rate of EAD in the training set and validation cohort were 55.91% (104/199) and 54.76% (23/42), respectively. In the training set, according to the results of univariable and multivariable analysis, 5 independent risk factors including donor gender, donor serum gamma-glutamyl transpeptidase level, donor serum urea level, donor comorbidities (respiratory, cardiac, and renal dysfunction), and recipient Model for End-stage Liver Disease score were identified and assembled into the nomogram. The AUC of internal validation using bootstrap resampling and prospective validation using the external cohort of 42 patients was 0.74 and 0.60, respectively. The calibration curves for probability of EAD showed acceptable agreement between nomogram prediction and actual observation. According to the score table, the probability of EAD was under 30% when the total point tally was under 72. But when the total was up to 139, the risk of EAD increased to 60%. CONCLUSION We've established and validated a nomogram that can provide individual prediction of EAD for liver transplant recipients. The practical prognostic model may help clinicians to qualify the liver graft accurately, making a more reasonable allocation of organs.
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Affiliation(s)
- L Yang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China; Guangdong Provincial International Cooperation Base of Science and Technology, Guangzhou, China
| | - E Y Xin
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China; Guangdong Provincial International Cooperation Base of Science and Technology, Guangzhou, China
| | - B Liao
- Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China; Guangdong Provincial International Cooperation Base of Science and Technology, Guangzhou, China; Pathology Department, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - L J Lai
- Intensive Care Unit, Xin Yi People's Hospital, Xinyi, China
| | - M Han
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China; Guangdong Provincial International Cooperation Base of Science and Technology, Guangzhou, China
| | - X P Wang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China; Guangdong Provincial International Cooperation Base of Science and Technology, Guangzhou, China
| | - W Q Ju
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China; Guangdong Provincial International Cooperation Base of Science and Technology, Guangzhou, China
| | - D P Wang
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China; Guangdong Provincial International Cooperation Base of Science and Technology, Guangzhou, China
| | - Z Y Guo
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China; Guangdong Provincial International Cooperation Base of Science and Technology, Guangzhou, China.
| | - X S He
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology, Guangzhou, China; Guangdong Provincial International Cooperation Base of Science and Technology, Guangzhou, China.
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Wang DP, Huang X, Jin H, Qin LQ, Zhang ZW. [The status of preventive medicine program of the National Natural Science Foundation of China in 2017]. Zhonghua Yu Fang Yi Xue Za Zhi 2017; 51:1137-1141. [PMID: 29262500 DOI: 10.3760/cma.j.issn.0253-9624.2017.12.018] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- D P Wang
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Department of Toxicology, Guizhou Medical University, Guiyang 550025, China
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Sun YH, Kong TT, Wang TT, Zhu HF, Zhuang TW, Wang DP. [Study of gonadotropin releasing hormone on suppressing migrationg and invationg of human nasopharyngeal carcinoma cells CNE2]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:830-834. [PMID: 29774996 DOI: 10.13201/j.issn.1001-1781.2017.11.004] [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] [Received: 03/03/2017] [Indexed: 11/12/2022]
Abstract
Objective:The aim of this study is to investigate the effect of gonadotropin releasing hormone (GnRH) on suppressing cell viability, apoptosis, migrationg and invationg of human nasopharyngeal carcinoma cells CNE2. Method:Nasopharyngeal carcinoma tissues and postnasal catarrh tissues were collected, the expression of GnRH positive cells and GnRH mRNA were detected by immunohistochemical staining and qRT-PCR. The human nasopharyngeal carcinoma CNE2 cells and immortalized nasopharyngeal epithelial cell line NP69 were cultured in vitro, and the expression of GnRH positive cells and GnRH mRNA were detected by immunohistochemical staining and qRT-PCR. The CNE2 cells were treated with GnRH with various concentrations 0 (Blank group), 10⁻², 10⁻¹, 10⁰ nmol/L. The effects of GnRH on the viability, apoptosis, migration and invasion of CNE2 cells were detected by cell Counting Kit (CCK-8), flow cytometry, wound healing assay and transwell chamber assay in vitro. Result:The expression of GnRH positive cells and GnRH mRNA in nasopharyngeal carcinoma tissues were markedly down regulated than postnasal catarrh tissues (P<0.05). The expression of GnRH positive cells and GnRH mRNA in CNE2 cells were markedly down regulated than NP69 cells (P<0.05). Compared with blank group, GnRH can significantly inhibite the cell viability cells, apoptosis, migration and invasive ability (P<0.05 or P<0.01). Conclusion:GnRH significantly inhibited the cell viability, apoptosis, migration and invasive ability of CNE2 cells.
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Affiliation(s)
- Y H Sun
- Department of Otolaryngology Head and Neck Surgery, the Affiliated Hongqi Hospital of Mudanjiang Medical University, Mudanjiang, 157011, China
| | - T T Kong
- Department of Otolaryngology Head and Neck Surgery, the Affiliated Hongqi Hospital of Mudanjiang Medical University, Mudanjiang, 157011, China
| | - T T Wang
- Department of Endocrinology, the Affiliated Hongqi Hospital of Mudanjiang Medical University
| | - H F Zhu
- Department of Endocrinology, the Affiliated Hongqi Hospital of Mudanjiang Medical University
| | - T W Zhuang
- Department of Endocrinology, the Affiliated Hongqi Hospital of Mudanjiang Medical University
| | - D P Wang
- Department of Endocrinology, the Affiliated Hongqi Hospital of Mudanjiang Medical University
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You W, Liu LJ, Chen HX, Xiong JY, Wang DM, Huang JH, Ding JL, Wang DP. Application of 3D printing technology on the treatment of complex proximal humeral fractures (Neer3-part and 4-part) in old people. Orthop Traumatol Surg Res 2016; 102:897-903. [PMID: 27521179 DOI: 10.1016/j.otsr.2016.06.009] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [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: 12/12/2015] [Revised: 03/15/2016] [Accepted: 06/09/2016] [Indexed: 02/02/2023]
Abstract
PURPOSE This study was conducted to investigate the feasibility and clinical potential of using the 3D printing technology (3DPT) versus typical strategy (thin-layer CT scan) for the treatment of complicated proximal humeral fractures (PHFs) in old people. METHODS Sixty-six old patients age ranging from 61 to 76 years with persistent complicated PHFs were randomly assigned to two groups as per the controlled randomization table (34 cases in the test group and 32 cases in the control group). In the test group, 3DPT was applied to build the 3D facture model of a patient, according to the data acquired from the thin-layer CT scan and subsequently processed with Mimics software. This helped to confirm the diagnosis, design the individual operation plan, simulate the surgical procedures and perform the surgery as plan. In the control group, only thin-layer CT scan was applied for the design of the operation plan prior to the surgery. Here, parameters including surgery duration, blood loss volume during surgery, the number of fluoroscopy, time to union were statistically analyzed for two groups after the operation. The screw lengths designed before the surgery and measured during the surgery were compared. RESULTS The 3D PHF model generated using 3DPT was able to provide the visual display and omni-directional observation of the direction and severity of the fracture dislocation, which facilitated preoperative diagnosis, operation planning and design, data measurement, preselection of internal fixator and surgical outcome simulation. According to the follow-up ranging from 12∼28 months for the 66 patients, the results showed no significant difference in time to union between the two groups (P>0.05). Apart from that, less surgery duration, less blood loss during surgery, less number of fluoroscopy can be observed compared with the control group (P<0.05). CONCLUSIONS In this study, 3DPT showed great clinical feasibility of the treatment of complicated PHFs. The 3D-print PHF model had the ability to clearly display the fracture and thus was useful to determine the fracture classification and the magnitude of fracture injury. It benefited surgeons to gain a better understanding of complicated PHFs, design a most suitable operation plan prior to surgery and facilitate the doctor-patient communication. This therefore enabled the reduction of intraoperative injury and the optimization of surgical outcomes.
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Affiliation(s)
- W You
- Department of traumatic orthopaedics, the affiliated clinical college Shenzhen second people's hospital, Anhui medical university, 230000 Hefei, Anhui, P.R. China; Shenzhen digital orthopedics technology engineering laboratory, Sun Gang West road, 518035 Shenzhen, Guangdong, P.R. China
| | - L J Liu
- Department of traumatic orthopaedics, the affiliated clinical college Shenzhen second people's hospital, Anhui medical university, 230000 Hefei, Anhui, P.R. China
| | - H X Chen
- Department of traumatic orthopaedics, the affiliated clinical college Shenzhen second people's hospital, Anhui medical university, 230000 Hefei, Anhui, P.R. China
| | - J Y Xiong
- Department of traumatic orthopaedics, the affiliated clinical college Shenzhen second people's hospital, Anhui medical university, 230000 Hefei, Anhui, P.R. China
| | - D M Wang
- Department of traumatic orthopaedics, the affiliated clinical college Shenzhen second people's hospital, Anhui medical university, 230000 Hefei, Anhui, P.R. China
| | - J H Huang
- Shenzhen digital orthopedics technology engineering laboratory, Sun Gang West road, 518035 Shenzhen, Guangdong, P.R. China
| | - J L Ding
- Department of traumatic orthopaedics, the affiliated clinical college Shenzhen second people's hospital, Anhui medical university, 230000 Hefei, Anhui, P.R. China
| | - D P Wang
- Shenzhen digital orthopedics technology engineering laboratory, Sun Gang West road, 518035 Shenzhen, Guangdong, P.R. China.
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Mitrofanov YP, Wang DP, Makarov AS, Wang WH, Khonik VA. Towards understanding of heat effects in metallic glasses on the basis of macroscopic shear elasticity. Sci Rep 2016; 6:23026. [PMID: 26975587 PMCID: PMC4792145 DOI: 10.1038/srep23026] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [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: 09/11/2015] [Accepted: 02/25/2016] [Indexed: 11/17/2022] Open
Abstract
It is shown that all heat effects taking place upon annealing of a metallic glass within the glassy and supercooled liquid states, i.e. heat release below the glass transition temperature and heat absorption above it, as well as crystallization-induced heat release, are related to the macroscopic shear elasticity. The underlying physical reason can be understood as relaxation in the system of interstitialcy-type ”defects” (elastic dipoles) frozen-in from the melt upon glass production.
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Affiliation(s)
- Y P Mitrofanov
- Department of General Physics, State Pedagogical University, Lenin St. 86, Voronezh, 394043 Russia
| | - D P Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, PR China
| | - A S Makarov
- Department of General Physics, State Pedagogical University, Lenin St. 86, Voronezh, 394043 Russia
| | - W H Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, PR China
| | - V A Khonik
- Department of General Physics, State Pedagogical University, Lenin St. 86, Voronezh, 394043 Russia
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Shen XB, Huang L, Zhang SH, Wang DP, Wu YL, Chen WN, Xu SH, Lin X. Transcriptional regulation of the apolipoprotein F (ApoF) gene by ETS and C/EBPα in hepatoma cells. Biochimie 2015; 112:1-9. [PMID: 25726912 DOI: 10.1016/j.biochi.2015.02.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 02/17/2015] [Indexed: 10/23/2022]
Abstract
Apolipoprotein F (ApoF) inhibits cholesteryl ester transfer protein (CETP) activity and plays an important role in lipid metabolism. In the present study, the full-length human ApoF promoter was cloned, and the molecular mechanism of the regulation of ApoF was investigated. The ApoF promoter displayed higher activities in hepatoma cell lines, and the -198 nt to +79 nt promoter region contained the maximum promoter activity. In the promoter region of -198 nt to -2 nt there were four putative binding sites for transcription factors ETS-1/ETS-2 (named EBS-1 to EBS-4) and one for C/EBP. Mutation of EBS-2, EBS4 and the C/EBP binding site abolished the promoter activity, and ETS-1/ETS-2 and C/EBPα could interact with corresponding binding sites. In addition, overexpression of ETS-1/2 or C/EBPα enhanced, while dominant-negative mutants of ETS-1/2 and knockdown of C/EBPα decreased, ApoF promoter activities. ETS-1 and C/EBPα associated physically, and acted synergistically to activate ApoF transcription. These results demonstrated combined activation of the ApoF promoter by liver-enriched and ubiquitous transcription factors. Direct interactions between C/EBPα and ETS-1 were important for high liver-specific expression of ApoF.
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Affiliation(s)
- Xue-Bin Shen
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China; Department of Cardiology, Affiliated Nanping First Hospital, Fujian Medical University, Nanping, China
| | - Ling Huang
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China; Department of Cardiology, Affiliated Nanping First Hospital, Fujian Medical University, Nanping, China
| | - Shao-Hong Zhang
- Department of Medical Laboratory, Affiliated Nanping First Hospital, Fujian Medical University, Nanping, China
| | - De-Ping Wang
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China; Department of Endocrinology and Metabolism, Hongqi Hospital of MuDanJiang Medical College, Mudanjiang, China
| | - Yun-Li Wu
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Wan-Nan Chen
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Shang-Hua Xu
- Department of Cardiology, Affiliated Nanping First Hospital, Fujian Medical University, Nanping, China.
| | - Xu Lin
- Key Laboratory of Ministry of Education for Gastrointestinal Cancer, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China.
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Yao AH, Li XD, Xiong L, Zeng JH, Xu J, Wang DP. Hollow hydroxyapatite microspheres/chitosan composite as a sustained delivery vehicle for rhBMP-2 in the treatment of bone defects. J Mater Sci Mater Med 2015; 26:5336. [PMID: 25578692 DOI: 10.1007/s10856-014-5336-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 07/31/2014] [Indexed: 06/04/2023]
Abstract
Composite scaffold comprised of hollow hydroxyapatite (HA) and chitosan (designated hHA/CS) was prepared as a delivery vehicle for recombinating human bone morphogenetic protein-2 (rhBMP-2). The in vitro and in vivo biological activities of rhBMP2 released from the composite scaffold were then investigated. The rhBMP-2 was firstly loaded into the hollow HA microspheres, and then the rhBMP2-loaded HA microspheres were further incorporated into the chitosan matrix. The chitosan not only served to bind the HA microspheres together and kept them at the implant site, but also effectively modified the release behavior of rhBMP-2. The in vitro release and bioactivity analysis confirmed that the rhBMP2 could be loaded and released from the composite scaffolds in bioactive form. In addition, the composite scaffolds significantly reduced the initial burst release of rhBMP2, and thus providing prolonged period of time (as long as 60 days) compared with CS scaffolds. In vivo bone regenerative potential of the rhBMP2-loaded composite scaffolds was evaluated in a rabbit radius defect model. The results revealed that the rate of new bone formation in the rhBMP2-loaded hHA/CS group was higher than that in both negative control and rhBMP2-loaded CS group. These observations suggest that the hHA/CS composite scaffold would be effective and feasible as a delivery vehicle for growth factors in bone regeneration and repair.
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Affiliation(s)
- Ai-Hua Yao
- School of Materials Science and Engineering, Tongji University, Shanghai, 200092, People's Republic of China,
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Jiang F, Wang DP, Ye S, Zhao X. Strontium-substituted, luminescent and mesoporous hydroxyapatite microspheres for sustained drug release. J Mater Sci Mater Med 2014; 25:391-400. [PMID: 24402509 DOI: 10.1007/s10856-013-5081-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 10/21/2013] [Indexed: 06/03/2023]
Abstract
The multifunctional strontium (Sr)-substituted hydroxyapatite microsphere was prepared via hydrothermal method, in which the luminescent and controlled drug release functions can be realized. The structure and morphology of the as-prepared microspheres were studied by using XRD, FTIR, SEM, TEM, HR-TEM, BET method. The optical properties was investigated by using photoluminescence (PL) and XPS measurement. Then, the as-prepared multifunctional microspheres were performed as a drug delivery carrier using vancomycin as a model drug. The experimental results show that the composition, morphology, luminescent properties and drug storage/release behaviour were obviously influenced by the amount of Sr. The microspheres with Sr(2+)/(Ca(2+) + Sr(2+)) = 0.3 of Sr substitution showed the maximum specific surface area, best pore structure and strongest PL intensity. All the samples presented remarkable sustained drug release kinetics. In addition, the PL intensity of SrHA in the drug delivery system increased with the cumulative release time (amount) of vancomycin, which would make the drug release might be possibly tracked by the change of the luminescent intensity. Our study indicated a potential prospect that the fabricated multifunctional SrHA mesoporous microspheres might be applied in the field of bone regeneration and drug delivery.
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Affiliation(s)
- Fei Jiang
- School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China
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Li WC, Wang DP, Li LJ, Zhu WM, Zeng YJ. Adenovirus-mediated bone morphogenetic protein-2 gene transfection of bone marrow mesenchymal stem cells combined with nano-hydroxyapatite to construct bone graft material in vitro. Artif Cells Nanomed Biotechnol 2012; 41:103-8. [PMID: 23030243 DOI: 10.3109/10731199.2012.715088] [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] [Indexed: 11/13/2022]
Abstract
To study the adhesion, proliferation and expression of bone marrow mesenchymal stem cells (BMSCs) on nano-hydroxyapatite (Nano-HA) bone graft material after transfection of adenovirus-mediated human bone morphogenetic protein-2 expression vector (Ad-BMP-2). BMSCs were transfected using Ad-BMP-2. Immunohistochemistry and Western blot were used to detect BMP-2 expression in transfected cells. After transfection, BMP-2 protein was highly expressed in BMSCs; MTT test assay showed that the Nano-HA bone graft material could not inhibit in vitro proliferation of BMSCs. Ad-BMP-2-transfected BMSCs are well biocompatible with Nano-HA bone graft material, the transfected cells in material can secrete BMP-2 stably for a long time.
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Affiliation(s)
- W C Li
- Department of Trauma Orthopedics, Second People's Hospital of Shenzhen, Guangdong Province, P. R. China
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Liao YF, Chang CC, Wang DP, Tseng BH, Liao YD, Lin CH. A novel approach for normalizing the photoreflectance spectrum by using polymer-dispersed liquid crystal. Rev Sci Instrum 2012; 83:103904. [PMID: 23126779 DOI: 10.1063/1.4757399] [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: 06/01/2023]
Abstract
This study developed a novel type of normalization procedure for modulation reflectance spectroscopy experiments to obtain the relative change in the reflectance spectrum, ΔR/R. This technique uses a polymer-dispersed liquid crystal to ensure that the dc component of the signal from the detector remained constant by varying the intensity of the light striking the sample. This method is particularly useful for photoreflectance measurement, which may encounter background problems because of scattered pump light and/or photoluminescence. It does not require a change in the gain of the detector or the use of a variable neutral density filter mounted on a servo-motor.
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Affiliation(s)
- Y F Liao
- Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
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Sun WP, He XH, Yu LQ, Wang DP, Qin ZH, Fang Q, Wang J. An improved polymerase chain reaction method for genetic testing of spinocerebellar ataxia type 3. Genetika 2011; 47:1416-1419. [PMID: 22232931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The development of a reliable PCR assay for genetic testing of spinocerebellar ataxia type 3. Touchdown PCR conditions were tested and different primer sets were evaluated with genomic DNA from blood sample of patients suffering from spinocerebellar ataxia type 3 (SCA3). An improved PCR assay was developed with a new set of primers and using the optimized touchdown PCR protocol. This new assay had been successfully employed in the screening of one identificated SCA3 family. Results from the present study document a simple and reliable PCR assay for genetic testing of SCA3. Strategies used in the present study may find applications in the optimization of PCR assay for triplet expansion with GC rich in the sequence context.
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Affiliation(s)
- W P Sun
- Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Soochow University School of Medicine, Suzhou 215123, China
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Pan HB, Zhao XL, Zhang X, Zhang KB, Li LC, Li ZY, Lam WM, Lu WW, Wang DP, Huang WH, Lin KL, Chang J. Strontium borate glass: potential biomaterial for bone regeneration. J R Soc Interface 2009; 7:1025-31. [PMID: 20031984 DOI: 10.1098/rsif.2009.0504] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Boron plays important roles in many life processes including embryogenesis, bone growth and maintenance, immune function and psychomotor skills. Thus, the delivery of boron by the degradation of borate glass is of special interest in biomedical applications. However, the cytotoxicity of borate glass which arises with the rapid release of boron has to be carefully considered. In this study, it was found that the incorporation of strontium into borate glass can not only moderate the rapid release of boron, but also induce the adhesion of osteoblast-like cells, SaOS-2, thus significantly increasing the cyto-compatibility of borate glass. The formation of multilayers of apatite with porous structure indicates that complete degradation is optimistic, and the spread of SaOS-2 covered by apatite to form a sandwich structure may induce bone-like tissue formation at earlier stages. Therefore, such novel strontium-incorporated borosilicate may act as a new generation of biomaterial for bone regeneration, which not only renders boron as a nutritious element for bone health, but also delivers strontium to stimulate formation of new bones.
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Affiliation(s)
- H B Pan
- Department of Orthopeadics & Traumatology, The University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong
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Abstract
Unlike alpha-amino acids, peptides formed from beta-amino acids (beta-peptides) display stability toward enzymatic degradation and may form turns and helices with as few as four residues. Because both the C alpha and C beta of the beta-amino acid may bear substituents, a large number of beta-amino acids can be synthesized. Beta-peptides form various well-defined secondary structures, including 14-helix, 12-helix, 10/12-helix, 10-helix, 8-helix, turn structures, sheets, and hairpins. For all of these reasons, beta-amino acids have been increasingly used as building blocks for molecular design and pharmaceutical applications. To explain the conformational features of beta-peptides, several quantum mechanics and molecular dynamics studies that rationalize the observed conformational features have been reported. However, a systematic account that unifies various factors critical to the conformational features is still lacking. In this Account, we present a detailed analysis of the conformational features of various beta-peptides. We start by studying the basic local conformational features of beta-peptides using di- and tripeptide models. Then, various secondary structures of unsubstituted beta-peptides with differing numbers of residues are investigated using a repeating unit approach to derive the intrinsic backbone conformational features. We find that the 10/12-helix is intrinsically most stable for the beta-peptide backbone. The 14-helix, 12-helix, and 10-helix structures have similar stabilities for beta-peptide backbones of four to six residues. The substituent effects on the stabilities of beta-peptide secondary structures are then analyzed. Combined with the substituent effect and the intrinsic backbone preferences, all experimental observations of secondary structure formation can be understood. For example, the 10/12-helix is favored for like-beta(2)/beta(3)-peptides, unlike-beta(3)/beta(3)-peptides, and beta(3)/beta-hGly-peptides because these substitution patterns do not cause steric problems for the 10/12-helix. Beta(3)-peptides, beta(2)-peptides, and beta (2,3)-peptides favor the 14-helix because the substituents in these peptides benefit the 14-helix the most but significantly destabilize the 10/12-helix. Because the 10/12-helix is intrinsically favored and has two favorable positions in each residue for substituents, many more hybrid beta-peptides are predicted to exist in this secondary structure, which suggests the need for further experiments. These results are valuable for determining the best use of these building blocks in the design of well-structured molecules with desirable chemical functions.
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Affiliation(s)
- Yun-Dong Wu
- Department of Chemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Wei Han
- Department of Chemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - De-Ping Wang
- Department of Chemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Yi Gao
- Department of Chemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Yi-Lei Zhao
- Department of Chemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
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Li JH, Li JL, Wang DP, Pi SF, Xie YX, Zhang MB, Hu XC. CuI-Catalyzed Suzuki−Miyaura and Sonogashira Cross-Coupling Reactions Using DABCO as Ligand. J Org Chem 2007. [DOI: 10.1021/jo070895z] [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: 11/30/2022]
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Li JH, Li JL, Wang DP, Pi SF, Xie YX, Zhang MB, Hu XC. CuI-Catalyzed Suzuki−Miyaura and Sonogashira Cross-Coupling Reactions Using DABCO as Ligand. J Org Chem 2007; 72:2053-7. [PMID: 17286440 DOI: 10.1021/jo0623742] [Citation(s) in RCA: 256] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the presence of TBAB, CuI-catalyzed Suzuki-Miyaura cross-coupling of vinyl halides and aryl halides with arylboronic acids was conducted smoothly to afford the corresponding diarylethenes and polyaryls in moderate to good yields using DABCO (1,4-diazabicyclo[2.2.2]octane) as the ligand. We also found that the inexpensive CuI/DABCO catalytic system was effective for Sonogashira cross-couplings of aryl halides and vinyl halides. A variety of aryl halides and vinyl halides including activated aryl chlorides underwent the coupling with terminal alkynes in moderate to excellent yields.
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Affiliation(s)
- Jin-Heng Li
- Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China.
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Wang DP, Li HG, Li YJ, Guo SC, Yang J, Qi DL, Jin C, Zhao XQ. Hypoxia-inducible factor 1α cDNA cloning and its mRNA and protein tissue specific expression in domestic yak (Bos grunniens) from Qinghai-Tibetan plateau. Biochem Biophys Res Commun 2006; 348:310-9. [PMID: 16876112 DOI: 10.1016/j.bbrc.2006.07.064] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2006] [Accepted: 07/13/2006] [Indexed: 11/28/2022]
Abstract
Adaptation to hypoxia is regulated by hypoxia-inducible factor 1 (HIF-1), a heterodimeric transcription factor consisting of an oxygen-regulated alpha-subunit and a constitutively expressed beta-subunit. How animals living on Qinghai-Tibetan plateau adapt to the extreme hypoxia environment is known indistinctly. In this study, the Qinghai yak, which has been living at 3000-5000 m altitude for at least two millions of years, was selected as the model of high hypoxia-tolerant adaptation species. The HIF-1alpha ORFs (open reading frames) encoding for two isoforms of HIF-1alpha have been cloned from the brain of the domestic yak. Its expression of HIF-1alpha was analyzed at both mRNA and protein levels in various tissues. Both its HIF-1alpha mRNA and protein are tissue specific expression. Its HIF-1alpha protein's high expression in the brain, lung, and kidney showed us that HIF-1alpha protein may play an important role in the adaptation to hypoxia environment.
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Affiliation(s)
- D P Wang
- Northwest Plateau Institute of Biology, The Chinese Academy of Sciences, Xining 810001, PR China
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Yang J, Zhao XQ, Guo SC, Li HG, Qi DL, Wang DP, Cao JH. Leptin cDNA cloning and its mRNA expression in plateau pikas (Ochotona curzoniae) from different altitudes on Qinghai-Tibet Plateau. Biochem Biophys Res Commun 2006; 345:1405-13. [PMID: 16730654 DOI: 10.1016/j.bbrc.2006.05.052] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2006] [Accepted: 05/07/2006] [Indexed: 11/17/2022]
Abstract
Leptin, an adipocyte-derived hormone, plays an important role in body energy homeostasis. Plateau pika (Ochotona curzoniae), an endemic and keystone species living only at 3000-5000 m above sea level on Qinghai-Tibet Plateau, is a typically high hypoxia and low temperature tolerant mammal with high resting metabolic rate (RMR), non-shivering thermogenesis (NST), and high ratio of oxygen utilization to cope with harsh plateau environment. To explore the molecular mechanism of ecological acclimation in plateau pika, we first cloned pika leptin cDNA and compared its mRNA expression in different altitudes (3200 and 3900 m) using real-time RT-PCR (Taqman probe) technology. The full-length pika leptin cDNA was 3015 with 504 bp open-reading frame encoding the precursor peptide of 167 amino acids including 21 residues of signal peptide. Pika leptin was 70-72% homologous to that of other species and was of similarly structural characteristics with other species. The pika-specific genetic diversity in leptin sequence occurred at twenty sites. With the increase in altitude, there were larger fat store and high level of ob gene expression in plateau pika. Our results indicated that leptin is sensitive to cold and hypoxia plateau environment and may play one of important roles in pika's ecological adaptation to harsh plateau environment.
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Affiliation(s)
- J Yang
- Northwest Plateau Institute of Biology, The Chinese Academy of Sciences, Xining, PR China
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Qiao B, Wu J, Chu YW, Wang Y, Wang DP, Wu HS, Xiong SD. Induction of systemic lupus erythematosus-like syndrome in syngeneic mice by immunization with activated lymphocyte-derived DNA. Rheumatology (Oxford) 2005; 44:1108-14. [PMID: 15840592 DOI: 10.1093/rheumatology/keh656] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES Systemic lupus erythematosus (SLE) is the prototype of autoimmune disease and the mechanisms underlying the disease have not yet been elucidated. Thus, animal models of SLE would facilitate investigation of pathogenetic mechanisms involved in the development of the disease. This study characterizes a murine model of SLE-like syndrome induced by syngeneic activated lymphocyte-derived DNA (referred to as ALD DNA). METHODS Normal BALB/c mice were immunized subcutaneously with highly purified ALD DNA. Anti-double-stranded DNA (anti-dsDNA) antibodies were determined by enzyme-linked immunosorbent assay. Other SLE-associated autoantibodies were examined by indirect immunofluorescence and anti-ENA (extractable nuclear antigen) profile assay. Pathological changes were analysed by light microscopy and electron microscopy. Kidney cryostat sections were viewed by immunofluorescence for the presence of glomerular IgG and C3 deposits. Proteinuria was measured by Coomassie brilliant blue assay. RESULTS High levels of anti-dsDNA antibodies and other autoantibodies frequently appearing in SLE were detectable in the sera of ALD DNA-immunized mice. Glomerulonephritis and glomerular deposition of IgG plus C3 were observed in the kidney sections. Moreover, proteinuria was seen in the immunized mice. CONCLUSIONS SLE-like syndrome can be induced by ALD DNA in normal mice. This induced model may be useful for elucidating the mechanisms involved in autoimmunity to DNA and the development of SLE.
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Affiliation(s)
- B Qiao
- Department of Immunology, Shanghai Medical College of Fudan University, P.R. China
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Li JH, Liang Y, Wang DP, Liu WJ, Xie YX, Yin DL. Efficient Stille Cross-Coupling Reaction Catalyzed by the Pd(OAc)2/Dabco Catalytic System. J Org Chem 2005; 70:2832-4. [PMID: 15787581 DOI: 10.1021/jo048066q] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] An efficient Pd(OAc)2/Dabco-catalyzed Stille cross-coupling reaction procedure has been developed. In the presence of Pd(OAc)2 and Dabco (triethylenediamine), various aryl halides including aryl iodides, aryl bromides, and activated aryl chlorides were coupled efficiently with organotin compounds to afford the corresponding biaryls, alkene, and alkynes in good to excellent yields. Furthermore, high TONs [turnover numbers, up to 980,000 TONs for the coupling reaction of 1-bromo-4-nitrobenzene and furan-2-yltributyltin] for the Stille cross-coupling reaction were observed.
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Affiliation(s)
- Jin-Heng Li
- Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China.
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