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Li J, Liu D, Zhang Y, Shen J, Dan W, Chen Z, Sun S. Site-Specific Analysis of Core and Antenna Fucosylation on Serum Glycoproteins. Anal Chem 2024; 96:5741-5745. [PMID: 38573003 DOI: 10.1021/acs.analchem.4c00445] [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: 04/05/2024]
Abstract
Fucosylation is an important structural feature of glycans and plays an essential role in the regulation of glycoprotein functions. Fucosylation can be classified into core- (CF) and antenna-fucosylation (AF, also known as (sialyl-) Lewis) based on the location on N-glycans, and they perform distinct biological functions. In this study, core- and antenna-fucosylated N-glycans on human serum glycoproteins that hold great clinical application values were systematically characterized at the site-specific level using StrucGP combined with the recently developed fucosylation assignment method. The results showed that fucosylation was widely distributed on serum glycoproteins, with 50% of fucosylated glycopeptides modified by AF N-glycans, 37% by CF N-glycans, and 13% by dual-fucosylated N-glycans. Interestingly, CF and AF N-glycans preferred to modify different groups of serum glycoproteins with different tissue origins and were involved in distinctive biological processes. Specifically, AF N-glycoproteins are mainly from the liver and participated in complement activation, blood coagulation, and endopeptidase activities, while CF N-glycoproteins originate from diverse tissues and are mainly involved in cell adhesion and signaling transduction. These data further enhanced our understanding of fucosylation on circulation glycoproteins.
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Affiliation(s)
- Jun Li
- College of Life Sciences, Northwest University, Xi'an 710069, China P.R
| | - Didi Liu
- College of Life Sciences, Northwest University, Xi'an 710069, China P.R
| | - Yingjie Zhang
- College of Life Sciences, Northwest University, Xi'an 710069, China P.R
| | - Jiechen Shen
- College of Life Sciences, Northwest University, Xi'an 710069, China P.R
| | - Wei Dan
- College of Life Sciences, Northwest University, Xi'an 710069, China P.R
| | - Zexuan Chen
- College of Life Sciences, Northwest University, Xi'an 710069, China P.R
| | - Shisheng Sun
- College of Life Sciences, Northwest University, Xi'an 710069, China P.R
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Yingqian H, Dan W, Liping L, Zhiman L, Dingxiang X, Zhuhao L, Zhiyun Y, Li J, Jing Z. Longitudinal evaluation of cerebral perfusion evolution after revascularization surgery in moyamoya disease by CT perfusion. J Stroke Cerebrovasc Dis 2024; 33:107638. [PMID: 38360250 DOI: 10.1016/j.jstrokecerebrovasdis.2024.107638] [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: 11/01/2023] [Revised: 02/09/2024] [Accepted: 02/13/2024] [Indexed: 02/17/2024] Open
Abstract
OBJECTIVE To assess the longitudinal evolution of cerebral perfusion after revascularization surgery in patients with moyamoya disease (MMD) by CT perfusion (CTP). MATERIALS AND METHODS Thirty-one clinically confirmed MMD patients (12 males and 19 females, average age: 33.26 y, Suzuki stages 3 and 4: 19 and 11, respectively) who underwent revascularization surgery (bilateral (n=13) or unilateral (n=18)) were studied retrospectively. All patients underwent CTP examinations before and in the week after surgery and long-term (>3 months). CTP metrics (CBF, CBV, MTT, TTP, and delay TTP) were derived. The corresponding CTP metric values of the ROIs, which were manually drawn in the white matter (WM) and gray matter (GM), were recorded. RESULTS Six patients developed a new or progressive cerebral infarction/hemorrhage. In all patients, compared with the preoperative level, the TTP of GM and WM decreased in the short term after the surgery (P ≤ 0.005). Concurrently, the WM CBF increased significantly a week after surgery (P =0.02). However, in the long-term follow-up, the CBV and CBF in the GM and WM decreased to equal to or lower than the preoperative level, especially for CBV in the WM (P =0.012). Furthermore, cerebral perfusion began to decrease in the sixth month, and a continuous decline was observed over the next two months. It returned to the presurgical level after one year. In addition, the improvement in postsurgical perfusion was greater in Suzuki stage 3 patients than stage 4 patients. CONCLUSION Cerebral perfusion in patients with MMD improved shortly after surgery. However, in the long-term, brain perfusion decreased, most seriously in 6-8 months postoperatively, which might indicate that patients with MMD need timely follow-up and long-term intervention.
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Affiliation(s)
- Huang Yingqian
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Road 2, Guangzhou, Guangdong 510080, China
| | - Wei Dan
- Department of Radiology, Hui Ya Hospital of The First Affiliated Hospital, Sun Yat-sen University, Huizhou, 516000, PR China
| | - Lin Liping
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Road 2, Guangzhou, Guangdong 510080, China
| | - Lai Zhiman
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Road 2, Guangzhou, Guangdong 510080, China
| | - Xie Dingxiang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Road 2, Guangzhou, Guangdong 510080, China
| | - Li Zhuhao
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Road 2, Guangzhou, Guangdong 510080, China
| | - Yang Zhiyun
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Road 2, Guangzhou, Guangdong 510080, China
| | - Jiang Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Road 2, Guangzhou, Guangdong 510080, China.
| | - Zhao Jing
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan Road 2, Guangzhou, Guangdong 510080, China.
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Li C, Dan W, Li P, Xin M, Lan R, Zhu B, Chen Z, Dong W, Dang L, Zhang X, Sun S. Site-specific N-glycan changes during semen liquefaction. Anal Biochem 2023; 680:115318. [PMID: 37696464 DOI: 10.1016/j.ab.2023.115318] [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: 01/31/2023] [Revised: 07/16/2023] [Accepted: 09/07/2023] [Indexed: 09/13/2023]
Abstract
Normal liquefaction of semen is one of the key steps to ensure the smooth progress of fertilization, and glycosylation has been reported to be involved in the whole process of fertilization. Till now, it is still unclear whether and how glycosylation changes during the liquefaction process of semen. In this study, by performing a glycoproteomic analysis of human semen with the liquefaction process (liquefaction time of semen: 0 min vs 30 min) using our recently developed StrucGP software combined with the Tandem Mass Tags (TMT) based quantification, we identified 25 intact glycopeptides (IGPs) from 10 glycoproteins in semen that were significantly changed during liquefaction, including 23 up-regulated and two down-regulated. Among the 23 up-regulated glycopeptides, half were modified with sialylated glycans, suggesting that sialylated glycans may play a key role in the semen liquefaction process. The data provide an invaluable resource for further studies on the role of glycosylation during semen liquefaction.
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Affiliation(s)
- Cheng Li
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, PR China
| | - Wei Dan
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, PR China
| | - Pengfei Li
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, PR China
| | - Miaomiao Xin
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, PR China
| | - Rongxia Lan
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, PR China
| | - Bojing Zhu
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, PR China
| | - Zexuan Chen
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, PR China
| | - Wenbo Dong
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, PR China
| | - Liuyi Dang
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, PR China
| | - Xinwen Zhang
- Center of Medical Genetics, Xi'an People's Hospital (Xi'an Fourth Hospital), Xi'an, Shaanxi, 710004, PR China
| | - Shisheng Sun
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, PR China.
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Chu Z, Mao Z, Song K, Jiang S, Min S, Dan W, Yu C, Wu M, Ren Y, Lu Z, Jiao J, Nan T, Dong S. A Multilayered Magnetoelectric Transmitter with Suppressed Nonlinearity for Portable VLF Communication. Research (Wash D C) 2023; 6:0208. [PMID: 37719048 PMCID: PMC10503940 DOI: 10.34133/research.0208] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 07/28/2023] [Indexed: 09/19/2023]
Abstract
Acoustically actuated magnetoelectric (ME) antenna based on the efficient oscillation of magnetic dipoles has recently been considered as a promising solution for portable very-low-frequency communications. However, the severe nonlinear dynamic behavior in the case of strong-field excitation results in insufficient radiation capability and poor communication performance for a conventional ME antenna. In this work, we propose to suppress the nonlinearity of an ME antenna by neutralizing the spring-hardening effect in amorphous Metglas and the spring-softening effect in piezoelectric ceramics through an ME multilayered transmitter (ME-MLTx) design. With a driving voltage of 50 Vpp at the resonance frequency of 21.2 kHz, a magnetic flux density as high as 108 fT at a distance of 100 m is produced from a single ME-MLTx. In addition, ME-MLTx performs a decreased mechanical quality factor (Q m) less than 40.65, and, thus, a broadened bandwidth of 500 Hz is generated. Finally, a communication link transmitting binary American Standard Code for Information Interchange-coded message is built, which allows for an error-free communication with a distance of 18 m and a data rate of 300 bit/s in the presence of heavy environment noise. The communication distance can be further estimated over 100 m when using a femtotesla-class-inductive magnetic field receiver. The obtained results are believed to bring ME antennas one step closer to being applicable in very-low-frequency communications.
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Affiliation(s)
- Zhaoqiang Chu
- Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao 266071, China
- College of Underwater Acoustics Engineering, Harbin Engineering University, Harbin 150001, China
| | - Zhineng Mao
- Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao 266071, China
| | - Kaixin Song
- Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao 266071, China
| | - Shizhan Jiang
- Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao 266071, China
| | - Shugang Min
- Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao 266071, China
| | - Wei Dan
- Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao 266071, China
| | - Chenyuan Yu
- Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao 266071, China
| | - Meiyu Wu
- Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao 266071, China
| | - Yinghui Ren
- Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao 266071, China
| | - Zhichao Lu
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808 China
| | - Jie Jiao
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Tianxiang Nan
- School of Integrated Circuits and Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Shuxiang Dong
- College of Engineering, Peking University, Beijing 100871, China
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Dan W, Wang X, Wu J, Gu Y, Liu S, Zhang H, Chang X, Shi C, Yan H, Xia M, Wang L, Jiao H, Wu H, Lou W, Gao X, Bian H, Wang J, Huang LH. The early effects of sleeve gastrectomy on postprandial chylomicron triglycerides during the progression of type 2 diabetes. Clin Chim Acta 2023; 549:117558. [PMID: 37709114 DOI: 10.1016/j.cca.2023.117558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 08/21/2023] [Accepted: 09/11/2023] [Indexed: 09/16/2023]
Abstract
BACKGROUND It remains unclear whether early sleeve gastrectomy (SG) improves postprandial very-low-density lipoprotein (VLDL) as well as chylomicron triglycerides (TGs) in a weight-independent manner in patients with or without type 2 diabetes (DM). Herein we investigated the early effects of SG on postprandial VLDL and chylomicron kinetics. METHODS A liquid meal test was performed before and after 1 week of SG. The plasma was collected for postprandial triglyceride-rich lipoprotein kinetics analyses, including VLDLs and chylomicrons, isolated by high-speed ultracentrifugation. Lipidomics and metabolomics were used to profile lipid and metabolite compositions of plasma and postprandial chylomicrons. De novo fatty acid synthesis in intestinal epithelial cells treated with chylomicron metabolites was examined using RT-PCR, immunoblotting, and free fatty acid measurement. RESULTS We found that patients with DM had markedly higher VLDL TGs than patients without DM, and such an increase was still retained after SG. In contrast, SG significantly decreased postprandial chylomicron TGs, but surprisingly, the degree of the reduction in patients with DM was less prominent than in patients without DM, confirmed by untargeted lipidomics analysis. Moreover, 5 unique metabolites potentially linked to de novo fatty acid synthesis from the pathway analysis were discovered by further metabolomic analysis of postprandial chylomicrons from patients with DM who underwent SG and verified by In vitro intestinal epithelial cell culture experiments. CONCLUSIONS SG in 1 week did not impact postprandial VLDL but decreased chylomicron TGs. Patients with DM keep higher postprandial chylomicron TG concentrations than patients without it after SG, potentially through some unique metabolites that increase intestinal fatty acid synthesis. These results implicate the timing for SG to reach lower intestinal fatty acid synthesis and postprandial chylomicron TG production is prior to the diagnosis of DM to potentially reduce cardiovascular risks.
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Affiliation(s)
- Wei Dan
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai 200433, China
| | - Xinmei Wang
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai 200433, China
| | - Jiaqi Wu
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai 200433, China
| | - Yu Gu
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai 200433, China
| | - Shuangshuang Liu
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai 200433, China
| | - Hongye Zhang
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai 200433, China
| | - Xinxia Chang
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Chenye Shi
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Hongmei Yan
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Mingfeng Xia
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Liu Wang
- Second Affiliated Hospital of Army Military Medical University, Chongqing 400037, China
| | - Heng Jiao
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Haifu Wu
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Wenhui Lou
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Xin Gao
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Hua Bian
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
| | - Jiaxi Wang
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai 200433, China.
| | - Li-Hao Huang
- Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Fudan University, Shanghai 200433, China; Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
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Dang L, Li P, Dan W, Liu H, Shen J, Zhu B, Jia L, Sun S. Glycoproteomic analysis of regulatory effects of bisecting N-glycans on N-glycan biosynthesis and protein expressions in human HK-2 cells. Carbohydr Res 2023; 531:108894. [PMID: 37421876 DOI: 10.1016/j.carres.2023.108894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 06/02/2023] [Accepted: 07/01/2023] [Indexed: 07/10/2023]
Abstract
Bisecting N-glycan is known to be a metastasis suppressor and plays a regulatory role in the biosynthesis of N-glycans. Previous studies have shown that bisecting N-glycans are capable of modulating both the branching and terminal modifications of glycans. However, these effects have been investigated mainly by glycomic approaches and it remains unclear how they alter when glycans are attached to different glycosites of proteins. Here, we systematically investigated the regulatory roles of bisecting N-glycans in human HK-2 cells using StrucGP, a strategy we developed for structural interpretation of site-specific N-glycans on glycoproteins. The glycoproteomics analysis showed that most of bisecting N-glycans are complex type and often occur in company with core fucosylation. With the overexpression and knockdown of MGAT3, the only enzyme responsible for bisecting N-glycan synthesis, we found that bisecting N-glycans can impact the biosynthesis of N-glycans from multiple aspects, including glycan types, branching, sialylation, fucosylation (different effects for core and terminal fucosylation) as well as the presence of terminal N-acetylglucosamine. Furthermore, gene ontology analysis suggested that most proteins with bisecting N-glycans located in the extracellular region or membrane, where they function mostly in cell adhesion, extracellular matrix regulation and cell signaling. Finally, we showed that overexpression of bisecting N-glycans had a broad impact on the protein expressions of HK-2 cells, involving multiple biological processes. Taken together, our work systematically demonstrated the expression profiles of bisecting N-glycans, and their regulatory effects on the biosynthesis of N-glycans and protein expressions, which provide valuable information for the functional elucidation of bisecting N-glycans.
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Affiliation(s)
- Liuyi Dang
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, China
| | - Pengfei Li
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, China
| | - Wei Dan
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, China
| | - Huanhuan Liu
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, China
| | - Jiechen Shen
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, China
| | - Bojing Zhu
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, China
| | - Li Jia
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, China
| | - Shisheng Sun
- College of Life Sciences, Northwest University, Xi'an, Shaanxi Province, 710069, China.
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Lin X, Li Q, Sun X, Shi Q, Dan W, Zhan Y, Deng B, Xia Y, Xie Y, Jiang L. Effects of apolipoprotein E polymorphism on cerebral oxygen saturation, cerebral perfusion, and early prognosis after traumatic brain injury. Ann Clin Transl Neurol 2023; 10:1002-1011. [PMID: 37186447 PMCID: PMC10270252 DOI: 10.1002/acn3.51783] [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] [Received: 11/11/2022] [Revised: 02/13/2023] [Accepted: 04/14/2023] [Indexed: 05/17/2023] Open
Abstract
OBJECTIVE To investigate the effects of the apolipoprotein E (APOE) gene on oxygen saturation and cerebral perfusion in the early stages of traumatic brain injury (TBI). METHODS This study included 136 consecutive TBI patients and 51 healthy individuals. The APOE genotypes of all subjects were determined using quantitative fluorescence polymerase chain reaction (QF-PCR). Regional cerebral oxygen saturation (rScO2) of patients with TBI and normal subjects was monitored using near-infrared spectroscopy (NIRS). Computed tomography (CT) perfusion was used to obtain cerebral perfusion in patients with TBI and normal subjects. RESULTS In the TBI group, the rScO2 of APOEε4 carriers (53.06 ± 6.87%) was significantly lower than that of non-carriers (58.19 ± 5.83%, p < 0.05). Meanwhile, the MTT of APOEε4 carriers (6.75 ± 1.30 s) was significantly longer than that of non-carriers (5.87 ± 1.00 s, p < 0.05). Furthermore, correlation analysis showed a negative correlation between rSCO2 and MTT in patients with TBI. Both the univariate and multifactorial logistic regression analyses revealed that APOE ε4, hypoxia, MTT >5.75 s, Marshall CT Class, and GCS were independent risk factors for early poor prognosis in patients with TBI. CONCLUSION Both cerebral perfusion and cerebral oxygen were significantly impaired after TBI, and low cerebral perfusion and hypoxia were related to poor prognosis of patients with TBI. Compared with APOE ε4 non-carriers, APOE ε4 carriers not only had poorer cerebral perfusion and cerebral oxygen metabolism but also worse prognosis in the early stages of TBI. Furthermore, a negative correlation was observed between the rSCO2 and MTT levels. In addition, both CT perfusion scanning (CTP) and NIRS are reliable for monitoring the condition of patients with TBI in the neurological intensive care unit (NICU).
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Affiliation(s)
- Xun Lin
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingPR China
| | - Qilin Li
- Department of NeurosurgeryYouyang HospitalChongqingPR China
| | - Xiaochuan Sun
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingPR China
| | - Quanhong Shi
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingPR China
| | - Wei Dan
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingPR China
| | - Yan Zhan
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingPR China
| | - Bo Deng
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingPR China
| | - Yulong Xia
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingPR China
| | - Yanfeng Xie
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingPR China
| | - Li Jiang
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingPR China
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Li X, Wei Y, Xie Y, Shi Q, Zhan Y, Dan W, Jiang L. Effects of Propofol on Cortical Electroencephalograms in the Operation of Glioma-Related Epilepsy. Brain Sci 2023; 13:brainsci13040597. [PMID: 37190562 DOI: 10.3390/brainsci13040597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/26/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023] Open
Abstract
Background: A cortical electroencephalogram (ECoG) is often used for the intraoperative monitoring of epilepsy surgery, and propofol is an important intravenous anesthetic, but its effect on EEGs is unclear. Objectives: To further clarify the effect of propofol on cortical ECoGs during glioma-related epilepsy surgery and to clarify the possible clinical value. Methods: A total of 306 patients with glioma were included in the study. Two hundred thirty-nine with glioma-related epilepsy were included in the epilepsy group, and 67 without glioma-related epilepsy were included in the control group. All patients experienced continuous, real-time ECoG monitoring and long-term follow-up after surgery. Results: After injection of low-dose propofol, the rate of activated ECoGs in the epilepsy group (74%) was significantly higher than in the control group (9%). Furthermore, compared with patients in the untreated group, patients in the treated group had lower rates of early and long-term postoperative seizure frequencies and fewer interictal epileptiform discharges (IEDs). Conclusions: Low-dose infusion of propofol can specifically activate ECoGs in epilepsy patients. Therefore, activated ECoGs might provide an accurate and reliable method for identifying potential epileptic zones during glioma-related epilepsy surgery, resulting in better early and long-term prognoses after epilepsy surgery.
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Hyuga S, Parry R, Dan W, Onishi Y, Gallos G, Okutomi T. Maternal heart rate variability patterns associated with maternal hypotension and non-reassuring fetal heart rate patterns following initiation of combined spinal-epidural labor analgesia: a prospective observational trial. Int J Obstet Anesth 2023; 54:103645. [PMID: 36930995 DOI: 10.1016/j.ijoa.2023.103645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 01/26/2023] [Accepted: 02/20/2023] [Indexed: 03/03/2023]
Abstract
BACKGROUND We evaluated whether baseline maternal heart rate variability (HRV), including the Analgesia Nociception Index (ANI), is associated with maternal hypotension and fetal heart rate (FHR) abnormalities following combined spinal-epidural (CSE) labor analgesia. METHODS Laboring women were enrolled in this prospective observational study. The primary endpoint was maternal hypotension. The secondary endpoint was FHR abnormalities within 30 min following CSE analgesia initiated with intrathecal plain bupivacaine 1.0 mg and fentanyl 20 µg. The maternal ANI, electrocardiogram, blood pressure, heart rate, oxygen saturation, and FHR tracings were recorded 15 min before and 30 min after CSE. Parturients were grouped based on presence of hypotension and FHR abnormalities. Patient demographics and HRV metrics were compared. Receiver operating characteristics (ROC) curves were constructed for the prediction of hypotension and FHR abnormalities. RESULTS No significant intergroup differences were detected in patient characteristics. Several baseline HRV metrics and ANI differed significantly between the normotensive (n = 50) and hypotensive (n = 31) groups and between parturients showing FHR abnormalities (n = 19) and those showing reassuring FHR traces (n = 62). The area under the ROC curve (AUC) for predicting hypotension of the baseline low-frequency (LF)/high-frequency (HF) ratio was 0.677 (95% CI 0.55 to 0.80), and that of the ANI was 0.858 (95% CI 0.78 to 0.94). For predicting non-reassuring FHR patterns, the AUC of the LF/HF ratio was 0.77 (95% CI 0.65 to 0.89), and that of the ANI was 0.833 (95% CI 0.72 to 0.94). CONCLUSIONS The ANI can predict the propensity for maternal hypotension and non-reassuring FHR patterns following CSE.
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Affiliation(s)
- S Hyuga
- Division of Obstetric Anesthesia, Center for Perinatal Care, Child Health and Development, Kitasato University Hospital, Minami-ku, Sagamihara City, Kanagawa, Japan.
| | - R Parry
- Department of Anesthesiology, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
| | - W Dan
- Department of Anesthesiology, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
| | - Y Onishi
- Department of Obstetrics and Gynecology, Kitasato University, School of Medicine, Minami-ku, Sagamihara City, Kanagawa, Japan
| | - G Gallos
- Department of Anesthesiology, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
| | - T Okutomi
- Division of Obstetric Anesthesia, Center for Perinatal Care, Child Health and Development, Kitasato University Hospital, Minami-ku, Sagamihara City, Kanagawa, Japan
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10
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Li P, Chen Z, You S, Xu Y, Hao Z, Liu D, Shen J, Zhu B, Dan W, Sun S. Application of StrucGP in medical immunology: site-specific N-glycoproteomic analysis of macrophages. Front Med 2022; 17:304-316. [PMID: 36580234 DOI: 10.1007/s11684-022-0964-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 09/06/2022] [Indexed: 12/30/2022]
Abstract
The structure of N-glycans on specific proteins can regulate innate and adaptive immunity via sensing environmental signals. Meanwhile, the structural diversity of N-glycans poses analytical challenges that limit the exploration of specific glycosylation functions. In this work, we used THP-1-derived macrophages as examples to show the vast potential of a N-glycan structural interpretation tool StrucGP in N-glycoproteomic analysis. The intact glycopeptides of macrophages were enriched and analyzed using mass spectrometry (MS)-based glycoproteomic approaches, followed by the large-scale mapping of site-specific glycan structures via StrucGP. Results revealed that bisected GlcNAc, core fucosylated, and sialylated glycans (e.g., HexNAc4Hex5Fuc1Neu5Ac1, N4H5F1S1) were increased in M1 and M2 macrophages, especially in the latter. The findings indicated that these structures may be closely related to macrophage polarization. In addition, a high level of glycosylated PD-L1 was observed in M1 macrophages, and the LacNAc moiety was detected at Asn-192 and Asn-200 of PD-L1, and Asn-200 contained Lewis epitopes. The precision structural interpretation of site-specific glycans and subsequent intervention of target glycoproteins and related glycosyltransferases are of great value for the development of new diagnostic and therapeutic approaches for different diseases.
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Affiliation(s)
- Pengfei Li
- College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Zexuan Chen
- College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Shanshan You
- College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Yintai Xu
- College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Zhifang Hao
- College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Didi Liu
- College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Jiechen Shen
- College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Bojing Zhu
- College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Wei Dan
- College of Life Sciences, Northwest University, Xi'an, 710069, China
| | - Shisheng Sun
- College of Life Sciences, Northwest University, Xi'an, 710069, China.
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11
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Dan W, Li C, Li J, Li P, Xin M, Chen Z, Dang L, Yu Z, Li J, Shen J, Hu L, Sun S. Glycoproteomic analysis reveals the effects of bisecting GlcNAc in intrahepatic cholangiocarcinoma. Glycoconj J 2022; 39:737-745. [PMID: 36322335 DOI: 10.1007/s10719-022-10085-5] [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: 08/01/2022] [Revised: 09/26/2022] [Accepted: 10/06/2022] [Indexed: 11/05/2022]
Abstract
Intrahepatic cholangiocarcinoma (ICC) is the second major subtype of primary liver cancer and has caused more and more attention with increasing incidence and mortality worldwide. Our previous study found that bisecting N-glycans are commonly increased in ICC, while the effects and potential functions of bisecting GlcNAc in ICC are still largely unclear. In this study, we further confirmed that the structures of bisecting GlcNAc were significantly up-regulated in ICC compared with paracancer tissues by glycoproteomic data and lectin histochemistry. The expression of its glycosyltransferase MGAT3 was also up-regulated in ICC tissues at both mRNA and protein levels, and expression of MGAT3 is negatively correlated with overall survival explored by bioinformatic analyses and published datasets from 255 patients. Next, the silencing of MGAT3 could inhibit the growth and invasion of ICC cells, and overexpressing of MGAT3 only promoted ICC cell invasion. Further glycoproteomic analysis showed that the commonly glycoproteins modified by bisecting GlcNAc after MGAT3-overexpression in two ICC cell lines were mainly involved in cell movement-related biological processes, such as cell adhesion, integrin-related and ECM-receptor interaction. This study sheds light on the potential effects of bisecting GlcNAc in ICC cells and suggests that MGAT3 might be used as a potential target in the therapy of ICC.
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Affiliation(s)
- Wei Dan
- College of Life Sciences, Northwest University, 710069, Xi'an, Shaanxi Province, P. R. China
| | - Cheng Li
- College of Life Sciences, Northwest University, 710069, Xi'an, Shaanxi Province, P. R. China
| | - Jun Li
- College of Life Sciences, Northwest University, 710069, Xi'an, Shaanxi Province, P. R. China
| | - Pengfei Li
- College of Life Sciences, Northwest University, 710069, Xi'an, Shaanxi Province, P. R. China
| | - Miaomiao Xin
- College of Life Sciences, Northwest University, 710069, Xi'an, Shaanxi Province, P. R. China
| | - Zexuan Chen
- College of Life Sciences, Northwest University, 710069, Xi'an, Shaanxi Province, P. R. China
| | - Liuyi Dang
- College of Life Sciences, Northwest University, 710069, Xi'an, Shaanxi Province, P. R. China
| | - Zihao Yu
- College of Life Sciences, Northwest University, 710069, Xi'an, Shaanxi Province, P. R. China
| | - Jing Li
- College of Life Sciences, Northwest University, 710069, Xi'an, Shaanxi Province, P. R. China
| | - Jiechen Shen
- College of Life Sciences, Northwest University, 710069, Xi'an, Shaanxi Province, P. R. China
| | - Liangshuo Hu
- Department of Hepatobiliary Surgery, Institute of Advanced Surgical Technology and Engineering, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Shisheng Sun
- College of Life Sciences, Northwest University, 710069, Xi'an, Shaanxi Province, P. R. China.
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12
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Xin M, You S, Wu J, Xu Y, Li C, Zhu B, Shen J, Chen Z, Dang L, Dan W, Zhang X, Sun S. Evaluation of absorbent cotton for glycopeptide enrichment. Anal Bioanal Chem 2022; 414:8245-8253. [PMID: 36181511 DOI: 10.1007/s00216-022-04353-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 09/19/2022] [Accepted: 09/22/2022] [Indexed: 11/30/2022]
Abstract
Selecting proper and efficient glycopeptide enrichment approaches are essential for mass spectrometry-based glycoproteomics since glycopeptides are usually with microheterogeneity and low abundance in most biological samples. Herein, we introduced a cotton hydrophilic interaction liquid chromatography (HILIC) approach for large-scale glycopeptide enrichment with 80% acetonitrile/1% trifluoroacetic acid as the optimal sample loading buffer. The comparison of cotton HILIC with Venusil HILIC and mixed anion-exchange (MAX) approaches indicated that cotton HILIC was superior in overall glycopeptide enrichment, whereas Venusil HILIC preferred in complex glycan structures and MAX performed better with high mannose glycans. Exploration of capacity and recovery rate of cotton HILIC illustrated that 5mg cotton packed in a 200μL tip achieved a reasonable glycopeptide enrichment performance (~6% recovery) from ~0.5mg peptides. In conclusion, cotton HILIC can be used as an optional glycopeptide enrichment approach in glycosylation analysis with its specific merit.
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Affiliation(s)
- Miaomiao Xin
- College of Life Science, Northwest University, Xi'an, Shaanxi Province, 710069, People's Republic of China.,South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Research Institute of Fish Culture and Hydrobiology, Faculty of Fisheries and Protection of Waters, University of South Bohemia in Ceske Budejovice, 38925, Vodnany, Czech Republic
| | - Shanshan You
- College of Life Science, Northwest University, Xi'an, Shaanxi Province, 710069, People's Republic of China
| | - Jingyu Wu
- College of Life Science, Northwest University, Xi'an, Shaanxi Province, 710069, People's Republic of China
| | - Yintai Xu
- College of Life Science, Northwest University, Xi'an, Shaanxi Province, 710069, People's Republic of China
| | - Cheng Li
- College of Life Science, Northwest University, Xi'an, Shaanxi Province, 710069, People's Republic of China
| | - Bojing Zhu
- College of Life Science, Northwest University, Xi'an, Shaanxi Province, 710069, People's Republic of China
| | - Jiechen Shen
- College of Life Science, Northwest University, Xi'an, Shaanxi Province, 710069, People's Republic of China
| | - Zexuan Chen
- College of Life Science, Northwest University, Xi'an, Shaanxi Province, 710069, People's Republic of China
| | - Liuyi Dang
- College of Life Science, Northwest University, Xi'an, Shaanxi Province, 710069, People's Republic of China
| | - Wei Dan
- College of Life Science, Northwest University, Xi'an, Shaanxi Province, 710069, People's Republic of China
| | - Xinwen Zhang
- Department of Medical Genetics, Xi'an Fourth Hospital, Xi'an, Shaanxi Province, 710004, People's Republic of China
| | - Shisheng Sun
- College of Life Science, Northwest University, Xi'an, Shaanxi Province, 710069, People's Republic of China.
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Yang B, Sun X, Shi Q, Dan W, Zhan Y, Zheng D, Xia Y, Xie Y, Jiang L. Prediction of early prognosis after traumatic brain injury by multifactor model. CNS Neurosci Ther 2022; 28:2044-2052. [PMID: 36017774 PMCID: PMC9627380 DOI: 10.1111/cns.13935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 07/11/2022] [Accepted: 07/22/2022] [Indexed: 02/06/2023] Open
Abstract
AIMS To design a model to predict the early prognosis of patients with traumatic brain injury (TBI) based on parameters that can be quickly obtained in emergency conditions from medical history, physical examination, and supplementary examinations. METHODS The medical records of TBI patients who were hospitalized in two medical institutions between June 2015 and June 2021 were collected and analyzed. Patients were divided into the training set, validation set, and testing set. The possible predictive indicators were screened after analyzing the data of patients in the training set. Then prediction models were found based on the possible predictive indicators in the training set. Data of patients in the validation set and the testing set was provided to validate the predictive values of the models. RESULTS Age, Glasgow coma scale score, Apolipoprotein E genotype, damage area, serum C-reactive protein, and interleukin-8 (IL-8) levels, and Marshall computed tomography score were found associated with early prognosis of TBI patients. The accuracy of the early prognosis prediction model (EPPM) was 80%, and the sensitivity and specificity of the EPPM were 78.8% and 80.8% in the training set. The accuracy of the EPPM was 79%, and the sensitivity and specificity of the EPPM were 66.7% and 86.2% in the validation set. The accuracy of the early EPPM was 69.1%, and the sensitivity and specificity of the EPPM were 67.9% and 77.8% in the testing set. CONCLUSION Prediction models integrating general information, clinical manifestations, and auxiliary examination results may provide a reliable and rapid method to evaluate and predict the early prognosis of TBI patients.
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Affiliation(s)
- Bocheng Yang
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Xiaochuan Sun
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Quanhong Shi
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Wei Dan
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Yan Zhan
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Dinghao Zheng
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Yulong Xia
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Yanfeng Xie
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Li Jiang
- Department of Neurosurgerythe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
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14
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Deng B, Zhu W, Sun X, Xie Y, Dan W, Zhan Y, Xia Y, Liang X, Li J, Shi Q, Jiang L. Development and Validation of an Automatic System for Intracerebral Hemorrhage Medical Text Recognition and Treatment Plan Output. Front Aging Neurosci 2022; 14:798132. [PMID: 35462698 PMCID: PMC9028758 DOI: 10.3389/fnagi.2022.798132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 02/25/2022] [Indexed: 11/30/2022] Open
Abstract
The main purpose of the study was to explore a reliable way to automatically handle emergency cases, such as intracerebral hemorrhage (ICH). Therefore, an artificial intelligence (AI) system, named, H-system, was designed to automatically recognize medical text data of ICH patients and output the treatment plan. Furthermore, the efficiency and reliability of the H-system were tested and analyzed. The H-system, which is mainly based on a pretrained language model Bidirectional Encoder Representations from Transformers (BERT) and an expert module for logical judgment of extracted entities, was designed and founded by the neurosurgeon and AI experts together. All emergency medical text data were from the neurosurgery emergency electronic medical record database (N-eEMRD) of the First Affiliated Hospital of Chongqing Medical University, Chongqing Emergency Medical Center, and Chongqing First People’s Hospital, and the treatment plans of these ICH cases were divided into two types. A total of 1,000 simulated ICH cases were randomly selected as training and validation sets. After training and validating on simulated cases, real cases from three medical centers were provided to test the efficiency of the H-system. Doctors with 1 and 5 years of working experience in neurosurgery (Doctor-1Y and Doctor-5Y) were included to compare with H-system. Furthermore, the data of the H-system, for instance, sensitivity, specificity, accuracy, positive predictive value (PPV), negative predictive value (NPV), and the area under the receiver operating characteristics curve (AUC), were calculated and compared with Doctor-1Y and Doctor-5Y. In the testing set, the time H-system spent on ICH cases was significantly shorter than that of doctors with Doctor-1Y and Doctor-5Y. In the testing set, the accuracy of the H-system’s treatment plan was 88.55 (88.16–88.94)%, the specificity was 85.71 (84.99–86.43)%, and the sensitivity was 91.83 (91.01–92.65)%. The AUC value of the H-system in the testing set was 0.887 (0.884–0.891). Furthermore, the time H-system spent on ICH cases was significantly shorter than that of doctors with Doctor-1Y and Doctor-5Y. The accuracy and AUC of the H-system were significantly higher than that of Doctor-1Y. In addition, the accuracy of the H-system was more closed to that of Doctor-5Y. The H-system designed in the study can automatically recognize and analyze medical text data of patients with ICH and rapidly output accurate treatment plans with high efficiency. It may provide a reliable and novel way to automatically and rapidly handle emergency cases, such as ICH.
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Affiliation(s)
- Bo Deng
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wenwen Zhu
- School of Intelligent Technology and Engineering, Chongqing University of Science and Technology, Chongqing, China
| | - Xiaochuan Sun
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yanfeng Xie
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wei Dan
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yan Zhan
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yulong Xia
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xinyi Liang
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jie Li
- School of Intelligent Technology and Engineering, Chongqing University of Science and Technology, Chongqing, China
- Jie Li,
| | - Quanhong Shi
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Quanhong Shi,
| | - Li Jiang
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- *Correspondence: Li Jiang,
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Yang B, Liang X, Wu Z, Sun X, Shi Q, Zhan Y, Dan W, Zheng D, Xia Y, Deng B, Xie Y, Jiang L. APOE gene polymorphism alters cerebral oxygen saturation and quantitative EEG in early-stage traumatic brain injury. Clin Neurophysiol 2022; 136:182-190. [DOI: 10.1016/j.clinph.2022.01.131] [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: 08/21/2021] [Revised: 01/11/2022] [Accepted: 01/23/2022] [Indexed: 11/03/2022]
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Chai WN, Wu YF, Wu ZM, Xie YF, Shi QH, Dan W, Zhan Y, Zhong JJ, Tang W, Sun XC, Jiang L. Neat1 decreases neuronal apoptosis after oxygen and glucose deprivation. Neural Regen Res 2022; 17:163-169. [PMID: 34100452 PMCID: PMC8451547 DOI: 10.4103/1673-5374.314313] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Studies have shown that downregulation of nuclear-enriched autosomal transcript 1 (Neat1) may adversely affect the recovery of nerve function and the increased loss of hippocampal neurons in mice. Whether Neat1 has protective or inhibitory effects on neuronal cell apoptosis after secondary brain injury remains unclear. Therefore, the effects of Neat1 on neuronal apoptosis were observed. C57BL/6 primary neurons were obtained from the cortices of newborn mice and cultured in vitro, and an oxygen and glucose deprivation cell model was established to simulate the secondary brain injury that occurs after traumatic brain injury in vitro. The level of Neat1 expression in neuronal cells was regulated by constructing a recombinant adenovirus to infect neurons, and the effects of Neat1 expression on neuronal apoptosis after oxygen and glucose deprivation were observed. The experiment was divided into four groups: the control group, without any treatment, received normal culture; the oxygen and glucose deprivation group were subjected to the oxygen and glucose deprivation model protocol; the Neat1 overexpression and Neat1 downregulation groups were treated with Neat1 expression intervention techniques and were subjected to the in oxygen and glucose deprivation protocol. The protein expression levels of neurons p53-induced death domain protein 1 (PIDD1, a pro-apoptotic protein), caspase-2 (an apoptotic priming protein), cytochrome C (a pro-apoptotic protein), and cleaved caspase-3 (an apoptotic executive protein) were measured in each group using the western blot assay. To observe changes in the intracellular distribution of cytochrome C, the expression levels of cytochrome C in the cytoplasm and mitochondria of neurons from each group were detected by western blot assay. Differences in the cell viability and apoptosis rate between groups were detected by cell-counting kit 8 assay and terminal deoxynucleotidyl transferase dUTP nick-end labeling assay, respectively. The results showed that the apoptosis rate, PIDD1, caspase-2, and cleaved caspase-3 expression levels significantly decreased, and cell viability significantly improved in the Neat1 overexpression group compared with the oxygen and glucose deprivation group; however, Neat1 downregulation reversed these changes. Compared with the Neat1 downregulation group, the cytosolic cytochrome C level in the Neat1 overexpression group significantly decreased, and the mitochondrial cytochrome C level significantly increased. These data indicate that Neat1 upregulation can reduce the release of cytochrome C from the mitochondria to the cytoplasm by inhibiting the PIDD1-caspase-2 pathway, reducing the activation of caspase-3, and preventing neuronal apoptosis after oxygen and glucose deprivation, which might reduce secondary brain injury after traumatic brain injury. All experiments were approved by the Animal Ethics Committee of the First Affiliated Hospital of Chongqing Medical University, China, on December 19, 2020 (approval No. 2020-895).
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Affiliation(s)
- Wei-Na Chai
- Department of Neurosurgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yi-Fan Wu
- Department of Neurosurgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhi-Min Wu
- Department of Neurosurgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yan-Feng Xie
- Department of Neurosurgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Quan-Hong Shi
- Department of Neurosurgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wei Dan
- Department of Neurosurgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yan Zhan
- Department of Neurosurgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jian-Jun Zhong
- Department of Neurosurgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wei Tang
- Department of Neurosurgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiao-Chuan Sun
- Department of Neurosurgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Li Jiang
- Department of Neurosurgery, First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Li S, Dan W, Chen L, Wu B, Ren L, Wei Y, Chen Q, Min S. The Investigation of Behavior Change in EEG Signals During Induction of Anesthesia. INT J PATTERN RECOGN 2021. [DOI: 10.1142/s0218001421580106] [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: 11/18/2022]
Abstract
Anesthesiology aims to make anesthesia safer and increase the precision of prognoses. Correct assessment of the anesthesia depth is crucial to its safety. At present, intraoperative electroencephalogram (EEG) monitoring is the primary mode of anesthesia depth monitoring and judgment. However, most clinical anesthesiologists rely on commercial anesthesia depth monitors to judge anesthesia depth, such as bispectral index (BIS) and patient state index (PSI). This may lack an understanding of associated changes in brain wave quantization. Therefore, this study conducts quantitative analyses of EEG signals during anesthesia induction. EEG signals are processed within specific time windows and extracted brainpower density spectrum arrays with different frequency bands, brain electrical signal spectra, source frequencies and other key indicators. Analysis and comparison of these indicators clarifies patterns of variation in EEG signals during early anesthesia induction. The spectral edge frequencies (SEFs) of EEG signals within different time windows can be modeled accurately, from which the specific time points of EEG signal changes are derived. Furthermore, the relationship between patient age and the effect of anesthetic drugs is preliminarily investigated by analyzing the SEF variations of different age groups. This study quantifies changes in the EEG signals of patients at the initial stage of anesthesia induction and drug-related effects are observed, which opens a way for further exploration of EEG changes in patients under general anesthesia.
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Affiliation(s)
- Shangkun Li
- Department of Anesthesiology, First Affiliated Hospital of Chongqing, Medical University, Chongqing, P. R. China
| | - Wei Dan
- Department of Anesthesiology, First Affiliated Hospital of Chongqing, Medical University, Chongqing, P. R. China
| | - Lihao Chen
- Department of Anesthesiology, First Affiliated Hospital of Chongqing, Medical University, Chongqing, P. R. China
| | - Bin Wu
- Department of Anesthesiology, First Affiliated Hospital of Chongqing, Medical University, Chongqing, P. R. China
| | - Li Ren
- Department of Anesthesiology, First Affiliated Hospital of Chongqing, Medical University, Chongqing, P. R. China
| | - Yu Wei
- Department of Anesthesiology, First Affiliated Hospital of Chongqing, Medical University, Chongqing, P. R. China
| | - Qibin Chen
- Department of Anesthesiology, First Affiliated Hospital of Chongqing, Medical University, Chongqing, P. R. China
| | - Su Min
- Department of Anesthesiology, First Affiliated Hospital of Chongqing, Medical University, Chongqing, P. R. China
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Wu Z, Feng Q, Liu M, Li J, Sun X, Shi Q, Zhan Y, Dan W, Yang B, Zheng D, Xia Y, Xie Y, Jiang L. Artery and venous sinus occlusion image score (AVOIS): A novel method to evaluate occlusive cerebral arteries and venous diseases. CNS Neurosci Ther 2021; 27:1077-1084. [PMID: 34145753 PMCID: PMC8339536 DOI: 10.1111/cns.13689] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 05/04/2021] [Accepted: 05/15/2021] [Indexed: 12/01/2022] Open
Abstract
AIM To establish an artery and venous sinus occlusion image score (AVOIS) which is compatible in both cerebral arteries and venous system diseases. METHODS A total of 188 consecutive patients with the final diagnosis of anterior circulation infarct (ACI) and 56 consecutive patients with cerebral venous and sinus thrombosis (CVST) were retrospectively studied. The AVOIS was developed based on the severity of occlusive changes of main intracranial arteries and venous sinuses (present = 0, partial occlusion = 1, absent = 2), and divided into four groups (CVST group: 0, 1-5, 6-10, >10. ACI group: 0, 1-5, 6-10, >10) arbitrarily. A receiver operating characteristic (ROC) curve was applied to discover the sensitivity and specificity of AVOIS. The National Institutes of Health Stroke Scale (NIHSS), Clot Burden Score (CBS) were set as the reference. Logistic regression models were developed to adjust for baseline clinical variables and AVOIS. Length of hospital stay (LOS) was also evaluated using the Kaplan-Meier estimator. RESULTS For the CVST group, a positive correlation between AVOIS and NIHSS was discovered (Spearman's ρ = 0.54, p < 0.001). For the ACI group, ROC showed relatively high sensitivity (84.8%) and specificity (81.8%). Besides, the probability of time to discharge was significantly different among the AVOIS subgroups as well (p < 0.001). CONCLUSION The AVOIS can be used to evaluate the treatment of patients with acute stroke caused by cerebral venous sinus thrombosis and anterior circulation large vessel occlusion. It is a reliable and convenient method that may help prompt prognosis and guide the treatment of individual patients.
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Affiliation(s)
- Zhimin Wu
- Department of NeurosurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Qinglin Feng
- Department of NeurosurgeryChongqing University Three Gorges HospitalChongqingChina
| | - Mengqi Liu
- Department of RadiologyThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Jie Li
- Institution of Intelligent Technology and EngineeringChongqing University of Science and TechnologyChongqingChina
| | - Xiaochuan Sun
- Department of NeurosurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Quanhong Shi
- Department of NeurosurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Yan Zhan
- Department of NeurosurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Wei Dan
- Department of NeurosurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Bocheng Yang
- Department of NeurosurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Dinghao Zheng
- Department of NeurosurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Yulong Xia
- Department of NeurosurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Yanfeng Xie
- Department of NeurosurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
| | - Li Jiang
- Department of NeurosurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
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Wu Z, Xie Y, Xiong S, Li J, Sun X, Shi Q, Dan W, Jiang L. The Venous Occlusion Image Score: A Novel Quantitative Scoring Instrument for Cerebral Venous Sinus Thrombosis. J Stroke Cerebrovasc Dis 2021; 30:105845. [PMID: 33964546 DOI: 10.1016/j.jstrokecerebrovasdis.2021.105845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 03/29/2021] [Accepted: 04/18/2021] [Indexed: 11/24/2022] Open
Abstract
PURPOSE This study aims to test the validity of a new quantitative scoring instrument-the Venous Occlusion Image Score (VOIS), and assess the diagnostic and prognostic value of VOIS for cerebral venous sinus thrombosis (CVST). METHODS The VOIS divided the major cerebral venous sinuses and internal jugular veins into nine parts of interest. CT venography and DSA source images and reconstruction were extracted from the database, then interpreted and scored independently according to VOIS by a panel of three reviewers. Inter-observer and intra-observer reliability were determined using the intraclass correlation coefficient (ICC) and the kappa coefficient (κ). The primary outcome was the 3-month functional outcome and evaluated by modified Rankin Scale (mRS). The sensitivity and specificity of VOIS for the primary outcomes were computed. Logistic regression was applied to evaluate the association between the score on VOIS and the primary outcomes. RESULTS Fifty-six patients with CVST were included in the study. For 16 patients underwent cerebral CTV and DSA, excellent interobserver agreement was observed for DSA (ICC=0.90, 95%CI = 0.87 - 0.92, P < 0.001), and CTV (ICC = 0.92, 95%CI = 0.84 - 0.93, P < 0.001). The κ coefficient of agreement for the two radiology measures was 0.88 (95%CI = 0.79-0.92), indicating good inter-method agreement. For 56 patients followed up by CTV, baseline VOIS value correlated inversely with the severity of stroke on the National Institutes of Health Stroke Scale (r = -0·53, P < 0·001), and modified Rankin Scale (r = -0·59, P < 0·001). Baseline CTV-VOIS value predicted functional outcome (P < 0·05). CONCLUSION VOIS may serve as a convenient and reliable method in the treatment guidance and outcome prediction of patients with CVST.
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Affiliation(s)
- Zhimin Wu
- Department of Neurosurgery, the First Affiliated Hospital of Chongqing Medical University, No. 1, Youyi Road, Yuanjiagang, Yuzhong District, Chongqing 400016, P R China
| | - Yanfeng Xie
- Department of Neurosurgery, the First Affiliated Hospital of Chongqing Medical University, No. 1, Youyi Road, Yuanjiagang, Yuzhong District, Chongqing 400016, P R China
| | - Senjie Xiong
- Department of Neurosurgery, University-Town Hospital of Chongqing Medical University, Chongqing, P R China
| | - Jie Li
- Institution of Intelligent Technology and Engineering, Chongqing University of Science and Technology, P R China
| | - Xiaochuan Sun
- Department of Neurosurgery, the First Affiliated Hospital of Chongqing Medical University, No. 1, Youyi Road, Yuanjiagang, Yuzhong District, Chongqing 400016, P R China
| | - Quanhong Shi
- Department of Neurosurgery, the First Affiliated Hospital of Chongqing Medical University, No. 1, Youyi Road, Yuanjiagang, Yuzhong District, Chongqing 400016, P R China
| | - Wei Dan
- Department of Neurosurgery, the First Affiliated Hospital of Chongqing Medical University, No. 1, Youyi Road, Yuanjiagang, Yuzhong District, Chongqing 400016, P R China
| | - Li Jiang
- Department of Neurosurgery, the First Affiliated Hospital of Chongqing Medical University, No. 1, Youyi Road, Yuanjiagang, Yuzhong District, Chongqing 400016, P R China.
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Wu Z, Xiong S, Sun X, Shi Q, Dan W, Zhan Y, Xie Y, Jiang L. Effects of Apolipoprotein E Polymorphism on Cerebral Oxygen Saturation After Traumatic Brain Injury. Front Neurol 2020; 11:539627. [PMID: 33262737 PMCID: PMC7688473 DOI: 10.3389/fneur.2020.539627] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 04/02/2020] [Accepted: 10/26/2020] [Indexed: 01/09/2023] Open
Abstract
Objective: To investigate the effects of the apolipoprotein E gene (APOE) on the cerebral oxygen saturation of patients after traumatic brain injury (TBI). Methods: Clinical data of 114 patients with TBI and 54 normal people were collected. The APOE genotypes of all subjects were determined by quantitative fluorescent polymerase chain reaction (QF-PCR). The regional cerebral oxygen saturation (rScO2) of TBI patients and normal people were monitored by near-infrared spectroscopy (NIRS). Results: The mean rScO2 of patients was (55.06 ± 7.60)% in the early stage of TBI, which was significantly lower than that of normal people (67.21 ± 7.80)% (P < 0.05). Single-factor and multifactor logistic regression analyses showed APOEε4 was an independent risk factor that caused the early decline of rScO2 in TBI patients. Furthermore, in the TBI group, the rScO2 of APOEε4 carriers (52.23 ± 8.02)% was significantly lower than that of non-ε4 carriers (60.33 ± 7.12)% (P < 0.05). But in the normal group, no significant differences in rScO2 were found between APOEε4 carriers and non-carriers. Conclusion: The rScO2 may be significantly decreased after TBI, and APOEε4 may be a risk factor for decreased rScO2 in the early stage of TBI.
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Affiliation(s)
- Zhimin Wu
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Senjie Xiong
- Department of Neurosurgery, University-Town Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaochuan Sun
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Quanhong Shi
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wei Dan
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yan Zhan
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yanfeng Xie
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Li Jiang
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Juncheng J, Dan W, Lei N, Gang F, Yong P. Inherent thermal runaway hazard evaluation method of chemical process based on fire and explosion index. J Loss Prev Process Ind 2020. [DOI: 10.1016/j.jlp.2020.104093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Dan W, Jin Y, Tang Z, Li Y, Yao H. Nucleotide composition and synonymous codon usage of open reading frames in Norovirus GII.4 variants. J Biomol Struct Dyn 2019; 38:4764-4773. [PMID: 31684837 DOI: 10.1080/07391102.2019.1689171] [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: 10/25/2022]
Abstract
Norovirus GII.4 variants, a genotype in genogroup II belonging to the genus Norovirus, is a single-strand positive sense RNA containing three open reading frames (ORF1, ORF2 and ORF3) and is the most important pathogen causing nonbacterial gastroenteritis outbreaks. By using bioinformatic softwares such as Codon W, SPSS and so on, a total of 292 strains of the viruses isolated from 1974 to 2016 were analyzed for nucleotide composition and synonymous codon usage in each ORF. The result shows that it is enriched for A over the other bases in nucleotide composition, G behind the other bases in the 3rd site of all synonymous codons in the three ORFs. The patterns of nucleotide composition and codon bias of ORF2 are similar to those of ORF3 and different from those of ORF1. There are generally UpA motif and CpG motif in the codons with the lowest proportion. Correspondence analysis indicates that the codon usage may be changing over a certain time period for ORF1 in 2006 and 2012, ORF2 in 2012, and ORF3 in 2013. ENC (effective number of codons) plot and other analyses indicate that both natural selection and mutational pressure play partly roles in the ORFs, but natural selection is more important for ORF2 and ORF3. Besides, we also found all optimal codons in the ORFs. The study provides a basic understanding of the mechanism for norovirus GII.4 codon usage bias. AbbreviationsORFOpen Reading FrameENCEffective Number of CodonsCOAcorrespondence analysisRSCURelative Synonymous Codon UsageCAICodon Adaptation IndexCBICodon Bias IndexFopfrequency of optimal codonsL_symnumber of synonymous codonsL_aalength amino acidsGRAVYgrand average of hydropathicityAromaaromaticityCommunicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Wei Dan
- College of Life Science, Sichuan Agriculture University, Ya'an, Sichuan, China
| | - Yan Jin
- College of Life Science, Sichuan Agriculture University, Ya'an, Sichuan, China
| | - Zizhong Tang
- College of Life Science, Sichuan Agriculture University, Ya'an, Sichuan, China
| | - Yongmin Li
- College of Life Science, Sichuan Agriculture University, Ya'an, Sichuan, China
| | - Huipeng Yao
- College of Life Science, Sichuan Agriculture University, Ya'an, Sichuan, China
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Wen Y, Wu K, Xie Y, Dan W, Zhan Y, Shi Q. Inhibitory effects of glucagon-like peptide-1 receptor on epilepsy. Biochem Biophys Res Commun 2019; 511:79-86. [DOI: 10.1016/j.bbrc.2019.02.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 02/06/2019] [Indexed: 12/20/2022]
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Wen Y, Wu Q, Shi Q, Xie Y, Dan W, Chen Y, Ma L. UCH-L1 inhibition aggravates mossy fiber sprouting in the pentylenetetrazole kindling model. Biochem Biophys Res Commun 2018; 503:2312-2318. [PMID: 29964011 DOI: 10.1016/j.bbrc.2018.06.154] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 06/16/2018] [Accepted: 06/27/2018] [Indexed: 10/28/2022]
Abstract
Mossy fiber sprouting (MFS) is a pathological phenomenon that is commonly observed in epilepsy, and plentiful data reveal that abnormal phosphorylated modification of tau protein plays a critical role in MSF by the regulation of microtubule dynamics and axonal transport. Ubiquitin C-terminal hydrolase L1 (UCH-L1), a proteasomal deubiquitinating enzyme, has been proved to be associated with tau aggregation through mediating degradation of ubiquitinated and hyperphosphorylated tau. Thus, this study aimed to determine the expression of UCH-L1 in the rat hippocampus during the pentylenetetrazole (PTZ)-induced process and to demonstrate the possible correlation with MFS in epileptogenesis. Seizures were established by intraperitoneal injection of PTZ and LDN-57444 was used to inhibit the hydrolase activity of UCH-L1. We used western blot, immunofluorescence, immunoprecipitation, and timm staining to detect phosphorylated modification of tau and MSF. The results presented that LDN-57444 induced the deteriorated severity of seizures, increased phosphorylation of tau and increased distribution of Timm granules in both the supragranular region of the dentate gyrus (DG) and the stratum pyramidale of CA3 subfield. Our results suggest that UCH-L1 may be associated with hippocampal MSF followed the epileptogenesis through mediating phosphorylation of tau. UCH-L1 may be a potential and novel therapeutic target to limit epileptogenesis.
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Affiliation(s)
- Yuetao Wen
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Number 1, Youyi Road. Yuzhong District, 400042, Chongqing, China
| | - Qingyuan Wu
- Department of Neurology, Chongqing Three Gorges Central Hospital, Number 165, Xincheng Road, Wanzhou District, 404000, Chongqing, China
| | - Quanhong Shi
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Number 1, Youyi Road. Yuzhong District, 400042, Chongqing, China
| | - Yanfeng Xie
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Number 1, Youyi Road. Yuzhong District, 400042, Chongqing, China
| | - Wei Dan
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Number 1, Youyi Road. Yuzhong District, 400042, Chongqing, China
| | - YangMei Chen
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Number 76, Linjiang Road, Yuzhong District, 400010, Chongqing, China
| | - Limin Ma
- Department of Neurology, Chongqing Three Gorges Central Hospital, Number 165, Xincheng Road, Wanzhou District, 404000, Chongqing, China.
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Wang Q, Hawkesworth CJ, Wyman D, Chung SL, Wu FY, Li XH, Li ZX, Gou GN, Zhang XZ, Tang GJ, Dan W, Ma L, Dong YH. Pliocene-Quaternary crustal melting in central and northern Tibet and insights into crustal flow. Nat Commun 2016; 7:11888. [PMID: 27307135 PMCID: PMC4912662 DOI: 10.1038/ncomms11888] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 05/10/2016] [Indexed: 11/10/2022] Open
Abstract
There is considerable controversy over the nature of geophysically recognized low-velocity–high-conductivity zones (LV–HCZs) within the Tibetan crust, and their role in models for the development of the Tibetan Plateau. Here we report petrological and geochemical data on magmas erupted 4.7–0.3 Myr ago in central and northern Tibet, demonstrating that they were generated by partial melting of crustal rocks at temperatures of 700–1,050 °C and pressures of 0.5–1.5 GPa. Thus Pliocene-Quaternary melting of crustal rocks occurred at depths of 15–50 km in areas where the LV–HCZs have been recognized. This provides new petrological evidence that the LV–HCZs are sources of partial melt. It is inferred that crustal melting played a key role in triggering crustal weakening and outward crustal flow in the expansion of the Tibetan Plateau. The role of the low velocity-high conductivity zones (LV–HCZs) in developing the Tibetan Plateau has remained controversial. Here, Wang et al. present new geochemical and petrological data that show the LV–HCZs are sources of partial melt thus giving insight into the development of the Tibetan Plateau.
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Affiliation(s)
- Qiang Wang
- State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.,CAS Center for Excellence in Tibetan Plateau Earth Sciences (CETES), Beijing 100101, China
| | - Chris J Hawkesworth
- School of Earth Sciences, University of Bristol, Wills Memorial Building, Queens Road, Bristol BS8 1RJ, UK.,Department of Earth and Environmental Sciences, University of St Andrews, North Street, St Andrews KY16 9AL, UK
| | - Derek Wyman
- School of Geosciences, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Sun-Lin Chung
- Institute of Earth Sciences, Academia Sinica, Nangang, Taipei 11529, Taiwan.,Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan
| | - Fu-Yuan Wu
- Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
| | - Xian-Hua Li
- Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
| | - Zheng-Xiang Li
- ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) and the Institute for Geoscience Research (TIGeR), Department of Applied Geology, Curtin University, Perth, Western Australia 6845, Australia
| | - Guo-Ning Gou
- State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Xiu-Zheng Zhang
- State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Gong-Jian Tang
- State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Wei Dan
- State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Lin Ma
- State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Yan-Hui Dong
- State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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Jing S, Dan W, Ke Y, Hongsong F, Xingdong Z. The simultaneously construct of cell-affinitive domains and space to enhance cell spreading and differentiation in spatial patternable hydrogel matrix. Front Bioeng Biotechnol 2016. [DOI: 10.3389/conf.fbioe.2016.01.01664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bhardwaj M, Arteta M, Batmunkh T, Briceno Leonardo L, Caraballo Y, Carvalho D, Dan W, Erdogan S, Brborovic H, Gudrun K, Ilse U, Ingle GK, Joshi SK, Kishore J, Khan Z, Retneswari M, Menses C, Moraga D, Njan A, Okonkwo FO, Ozlem K, Ravichandran S, Rosales J, Rybacki M, Sainnyambuu M, Shathanapriya K, Radon K. Attitude of medical students towards occupational safety and health: a multi-national study. Int J Occup Environ Med 2015; 6:7-19. [PMID: 25588221 PMCID: PMC6977061 DOI: 10.15171/ijoem.2015.488] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 09/17/2014] [Indexed: 11/09/2022]
Abstract
BACKGROUND Work-related diseases contribute immensely to the global burden of diseases. Better understanding of attitudes of health care workers towards occupational safety and health (OSH) is important for planning. OBJECTIVE To assess the attitude of medical students towards OSH around the globe. METHODS A questionnaire assessing the attitude towards OSH was administered to medical and paramedical students of 21 Medical Universities across the globe. In the current study 1895 students, aged 18-36 years, from 17 countries were included. After having performed a principal components analysis, the associations of interest between the identified components and other socio demographic characteristics were assessed by multivariate linear regression. RESULTS Principal component analysis revealed 3 components. Students from lower and lower-middle-income countries had a more positive attitude towards OSH, but the importance of OSH was still rated higher by students from upper-income countries. Although students from Asian and African continents showed high interest for OSH, European and South-Central American students comparatively rated importance of OSH to be higher. Paramedical students had more positive attitude towards OSH than medical students. CONCLUSION The attitude of students from lower-income and lower-middle-income towards importance of OSH is negative. This attitude could be changed by recommending modifications to OSH courses that reflect the importance of OSH. Since paramedical students showed more interest in OSH than medical students, modifications in existing health care system with major role of paramedics in OSH service delivery is recommended.
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Affiliation(s)
- M Bhardwaj
- Institute for Medical Informatics, Biometry and Epidemiology, Ludwig Maximilians University of Munich, Munich, Germany.
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Zhan A, Xu X, Chen L, Wang X, Yanfeng X, Dan W, Zhan Y, Shi Q. Decreased expression of Gab2 in patients with temporal lobe epilepsy and pilocarpine-induced rat model. Synapse 2013; 68:168-77. [PMID: 24327320 DOI: 10.1002/syn.21725] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 07/09/2013] [Revised: 11/24/2013] [Accepted: 12/04/2013] [Indexed: 12/30/2022]
Abstract
Growth factor receptor bound protein-2 associated binding protein-2 (Gab2) is widely expressed in the central nervous system, and participates in multiple signaling pathways. Recent studies showed that Gab2 was involved in the pathogenesis of Alzheimer's disease (AD). Gab2 reduces tau phosphorylation levels and is associated with cellular apoptosis and differentiation. However, whether Gab2 was also involved in the pathogenesis of epilepsy, remains unknown. This study aimed to investigate the expression pattern of Gab2 protein in brains with temporal lobe epilepsy (TLE) and in pilocarpine-induced rat model of TLE. Western blot, immunohistochemistry, and immunofluorescence were used to assess the location and the expression level of Gab2 in the neocortex of the temporal lobe in patients with TLE and in rat model of epilepsy. Results showed that Gab2 protein was expressed mainly in the membranes and cytoplasm of neurons in the cortex and hippocampus. Gab2 protein expression was remarkably reduced in temporal neocortex of TLE patients. In hippocampus and adjacent cortex in rat epilepsy model, Gab2 expression was decreased at different time points after kindling compared with the controls, and the lowest level of Gab2 expression occurred at 1 week. Thus, significant reductions of Gab2 protein in both TLE patients and epilepsy rats suggest that Gab2 may play an important role in the pathogenesis of TLE.
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Affiliation(s)
- Ao Zhan
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
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Fang S, Zhan Y, Xie YF, Shi Q, Dan W. Predictive value of electrocorticography for postoperative epilepsy in patients with supratentorial meningioma. J Clin Neurosci 2012; 20:112-6. [PMID: 23137667 DOI: 10.1016/j.jocn.2012.02.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Revised: 01/30/2012] [Accepted: 02/04/2012] [Indexed: 11/16/2022]
Abstract
This study examines electrocorticography (ECoG) signals in patients with supratentorial meningioma before and after tumor resection, and discusses its predictive value with regard to postoperative epilepsy. Ninety-one patients with supratentorial meningioma, who presented with seizures, were studied. Patients were followed-up for 2 to 5 years, and the occurrence rate of postoperative epilepsy in each group was compared. Depending on the frequency and amplitude variation in multiple spike waves on ECoG, patients were divided into those with an increase in epileptic discharge (Group A), those with no change (Group B), and those with a reduction in epileptic discharge (Group C). Postoperative seizures was classified as early postoperative seizures (within 1 week of surgery) or late postoperative seizures (> 1 week after surgery). After lesion resection and measurement of ECoG, the 91 patients were divided into Group A (12 patients, 13.19%), Group B (36 patients, 39.56%) and Group C (43 patients, 47.25%). Of these 91 patients, 29 (31.87%) had early postoperative seizures of which seven patients (58.33%) were from Group A, 13 (36.11%) were from Group B and nine (20.93%) were from Group C (χ(2)=6.53, p<0.05). Seventeen patients (18.68%) had late postoperative seizures, of which two patients (16.67%) were from Group A, seven were from Group B (19.44%) and eight were from Group C (18.60%) (χ(2)=0.05, p>0.05). Of the 29 patients with early postoperative seizures, seven (24.14%) also had late postoperative epilepsy. Of the 62 patients who did not experience early postoperative seizures, 10 (16.13%) also had late postoperative epilepsy (χ(2)=0.83, p>0.05). Thus, the change in ECoG before and after resection in patients with supratentorial meningioma has a predictive value for early postoperative seizures.
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Affiliation(s)
- Sheng Fang
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Yuzhong, Chongqing 400016, China
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Qi L, Yuling W, Zhou Z, Zhiqin X, Feng LW, Haojie Z, Dan W. Effect of graded elastic band exercise and balance training on cardiovascular capacity and functional mobility in subacute and chronic stroke. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.672] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Jiang L, Yin X, Yin C, Zhou S, Dan W, Sun X. Different quantitative EEG alterations induced by TBI among patients with different APOE genotypes. Neurosci Lett 2011; 505:160-4. [PMID: 22015765 DOI: 10.1016/j.neulet.2011.10.011] [Citation(s) in RCA: 14] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 10/03/2011] [Accepted: 10/04/2011] [Indexed: 11/20/2022]
Abstract
Although several studies have revealed the EEG alterations in AD and TBI patients, the influence of APOE (apolipoprotein E) genotype in EEG at the early stage of TBI has not been reported yet. We have previously studied EEG alterations caused by TBI among different APOE genotype carriers. In this study, we firstly investigated the relationship between APOE polymorphisms and quantitative EEG (QEEG) changes after TBI. A total of 118 consecutive TBI patients with a Glasgow Coma Scale (GCS) of 9 or higher were recruited, and 40 normal adults were also included as a control group. APOE genotype was determined by PCR-RFLP for each subject, and QEEG recordings were performed in rest, relaxed, awake and with eyes closed in normal subjects and TBI patients during 1-3 days after TBI. In the normal control group, both APOEɛ4 carriers and non-carriers had normal EEG, and no significant difference of QEEG data was found between APOEɛ4 carriers and non-carriers. But in the TBI group, APOEɛ4 carriers had more focal or global irregular slow wave activities than APOEɛ4 non-carriers. APOE gene did not influence brain electrical activity under normal conditions, but TBI can induce different alterations among different APOE gene carriers, and APOEɛ4 allele enhances the EEG abnormalities at the early stage of TBI.
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Affiliation(s)
- Li Jiang
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, PR China
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Guoying Z, Hui Z, Ming G, Dan W. Mechanism of Effects of Rare Earths on Microstructure and Properties at Elevated Temperatures of AZ91 Magnesium Alloy. J RARE EARTH 2007. [DOI: 10.1016/s1002-0721(07)60434-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yan Y, Tang WY, He JG, Gao JJ, Dan W, Zhong D, Yang G, Liu K, Huang HL. [Clinical research about brain oxygen metabolism and neuroelectrophysiology during mild hypothermia in patients with severe head injury]. Zhonghua Wai Ke Za Zhi 2007; 45:109-13. [PMID: 17418039] [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: 05/14/2023]
Abstract
OBJECTIVE To observe the changes of brain oxygen metabolism and neuroelectrophysiology after severe brain injury, and the effects of hypothermia on severe brain injury. METHODS 148 patients with severe brain injury (GCS 3 - 8, admitted within 10 hours from injury) were selected for this study. Patients were divided into 3 groups, Group GCS 7 - 8, Group GCS 5 - 6 and Group GCS 3 - 4. Every group were also randomly assigned to normothermia and hypothermia subgroup. Patients in the hypothermia group were cooled to 32 approximately 34 degrees C. SLSEP, BAEP, P(br)O(2) and rSaO(2) were recorded in each group at the same time. RESULTS In the Group GCS 7 - 8, N20 in SLSEP, I/V in BAEP and rSaO(2) were improved significantly after mild hypothermia treatment, and P(br)O(2) was decreased by hypothermia; In the Group GCS 5 - 6, N20 in SLSEP, I/V in BAEP and rSaO(2) were improved by hypothermia, and P(br)O(2) was decreased in hypothermia subgroup; In the Group GCS 3 - 4, no significant difference was found. CONCLUSION Mild hypothermia has a significant effect on patients of GCS 7 - 8 and a doubt effect on patients of GCS 5 - 6. It seem no effect on patients of GCS 3 - 4. Brain oxygen metabolism and neuroelectrophysiology are important to value the therapeutic effect on severe brain injury.
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Affiliation(s)
- Yi Yan
- Department of Neurosurgery, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.
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