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Zheng X, Ming W, Liu P, Zhang J, Zhou H, Chen M, Li W, Huang B, Wang H, Yang C. Correction: Ionic migration induced loss analysis of perovskite solar cells: a poling study. Phys Chem Chem Phys 2024; 26:9074. [PMID: 38439689 DOI: 10.1039/d4cp90033b] [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: 03/06/2024]
Abstract
Correction for 'Ionic migration induced loss analysis of perovskite solar cells: a poling study' by Xue Zheng et al., Phys. Chem. Chem. Phys., 2022, 24, 7805-7814, https://doi.org/10.1039/D1CP05450C.
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Affiliation(s)
- Xue Zheng
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Wenjie Ming
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
- Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, and School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Pingping Liu
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Jie Zhang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Hongfei Zhou
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Ming Chen
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Weimin Li
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Boyuan Huang
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, Guangdong, China
| | - Huan Wang
- School of Electrical Engineering and Automation, Hefei University of Technology, Hefei, 230009, China
| | - Chunlei Yang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
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Wu H, Cai C, Ming W, Chen W, Zhu Z, Feng C, Jiang H, Zheng Z, Sawan M, Wang T, Zhu J. Speech decoding using cortical and subcortical electrophysiological signals. Front Neurosci 2024; 18:1345308. [PMID: 38486966 PMCID: PMC10937352 DOI: 10.3389/fnins.2024.1345308] [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: 11/27/2023] [Accepted: 02/12/2024] [Indexed: 03/17/2024] Open
Abstract
Introduction Language impairments often result from severe neurological disorders, driving the development of neural prosthetics utilizing electrophysiological signals to restore comprehensible language. Previous decoding efforts primarily focused on signals from the cerebral cortex, neglecting subcortical brain structures' potential contributions to speech decoding in brain-computer interfaces. Methods In this study, stereotactic electroencephalography (sEEG) was employed to investigate subcortical structures' role in speech decoding. Two native Mandarin Chinese speakers, undergoing sEEG implantation for epilepsy treatment, participated. Participants read Chinese text, with 1-30, 30-70, and 70-150 Hz frequency band powers of sEEG signals extracted as key features. A deep learning model based on long short-term memory assessed the contribution of different brain structures to speech decoding, predicting consonant articulatory place, manner, and tone within single syllable. Results Cortical signals excelled in articulatory place prediction (86.5% accuracy), while cortical and subcortical signals performed similarly for articulatory manner (51.5% vs. 51.7% accuracy). Subcortical signals provided superior tone prediction (58.3% accuracy). The superior temporal gyrus was consistently relevant in speech decoding for consonants and tone. Combining cortical and subcortical inputs yielded the highest prediction accuracy, especially for tone. Discussion This study underscores the essential roles of both cortical and subcortical structures in different aspects of speech decoding.
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Affiliation(s)
- Hemmings Wu
- Department of Neurosurgery, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Clinical Research Center for Neurological Disease of Zhejiang Province, Hangzhou, China
| | - Chengwei Cai
- Department of Neurosurgery, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Wenjie Ming
- Department of Neurosurgery, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Wangyu Chen
- Department of Neurosurgery, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhoule Zhu
- Department of Neurosurgery, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Chen Feng
- Department of Neurosurgery, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hongjie Jiang
- Department of Neurosurgery, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhe Zheng
- Department of Neurosurgery, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Mohamad Sawan
- CenBRAIN Lab, School of Engineering, Westlake University, Hangzhou, China
| | - Ting Wang
- School of Foreign Languages, Tongji University, Shanghai, China
- Center for Speech and Language Processing, Tongji University, Shanghai, China
| | - Junming Zhu
- Department of Neurosurgery, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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3
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Ding Y, Cen Z, Zheng Y, Qiu X, Ye Y, Chen X, Hu L, Wang B, Wang Z, Yin H, Shen C, Ming W, Ge Y, Xie F, Yang D, Ouyang Z, Wang H, Wu S, Ding M, Wang S, Luo W. Seizures and electrophysiological features in familial cortical myoclonic tremor with epilepsy 1. Ann Clin Transl Neurol 2024; 11:414-423. [PMID: 38059543 PMCID: PMC10863925 DOI: 10.1002/acn3.51961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 11/09/2023] [Accepted: 11/11/2023] [Indexed: 12/08/2023] Open
Abstract
OBJECTIVES To investigate and characterize epileptic seizures and electrophysiological features of familial cortical myoclonic tremor with epilepsy (FCMTE) type 1 patients in a large Chinese cohort. METHODS We systematically evaluated 125 FCMTEtype 1 patients carrying the pentanucleotide (TTTCA) repeat expansion in the SAMD12 gene in China. RESULTS Among the 28 probands, epileptic seizures (96.4%, 27/28) were the most common reason for an initial clinic visit. Ninety-seven (77.6%, 97/125) patients had experienced seizures. The seizures onset age was 36.5 ± 9.0 years, which was 6.9 years later than cortical tremors. The seizures were largely rare (<1/year, 58.8%) and occasional (1-6/year, 37.1%). Prolonged prodromes were reported in 57.7% (56/97). Thirty-one patients (24.8%, 31/125) reported photosensitivity history, and 79.5% (31/39) had a photoparoxysmal response. Interictal epileptiform discharges (IEDs) were recorded in 69.1% (56/81) of patients. Thirty-three patients showed generalized IEDs and 72.7% (24/33) were occipitally dominant, while 23 patients presented with focal IEDs with 65.2% (15/23) taking place over the occipital lobe. Overnight EEG of FCMTE patients displayed paradoxical sleep-wake fluctuation, with a higher average IED index of 0.82 ± 0.88/min during wakefulness and a lower IED index of 0.04 ± 0.06/min during non-rapid eye movement sleep stages I-II. INTERPRETATION FCMTE type 1 has a benign course of epilepsy and distinct clinical and electrophysiological features. In addition to a positive family history and cortical myoclonus tremor, the seizure prodromes, specific seizure triggers, photosensitivity, distribution of IEDs, and unique fluctuations during sleep-wake cycle are cues for proper genetic testing and an early diagnosis of FCMTE.
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Affiliation(s)
- Yao Ding
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
- Epilepsy CenterSecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Zhidong Cen
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Yang Zheng
- Department of NeurologyZhejiang Chinese Medical University First Affiliated HospitalHangzhouZhejiangChina
| | - Xia Qiu
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Yumao Ye
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
- Department of NeurologyQingyuan County People's HospitalLishuiZhejiangChina
| | - Xinhui Chen
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Lingli Hu
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
- Epilepsy CenterSecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Bo Wang
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Zhongjin Wang
- Epilepsy CenterSecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Houmin Yin
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Chunhong Shen
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Wenjie Ming
- Epilepsy CenterSecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Yi Ge
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Fei Xie
- Department of NeurologySir Run Run Shaw Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Dehao Yang
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Zhiyuan Ouyang
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Haotian Wang
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Sheng Wu
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Meiping Ding
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
- Epilepsy CenterSecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Shuang Wang
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
- Epilepsy CenterSecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Wei Luo
- Department of NeurologySecond Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
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Ye H, Ye L, Hu L, Yang Y, Ge Y, Chen R, Wang S, Jin B, Ming W, Wang Z, Xu S, Xu C, Wang Y, Ding Y, Zhu J, Ding M, Chen Z, Wang S, Chen C. Widespread slow oscillations support interictal epileptiform discharge networks in focal epilepsy. Neurobiol Dis 2024; 191:106409. [PMID: 38218457 DOI: 10.1016/j.nbd.2024.106409] [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: 09/24/2023] [Revised: 01/01/2024] [Accepted: 01/09/2024] [Indexed: 01/15/2024] Open
Abstract
Interictal epileptiform discharges (IEDs) often co-occur across spatially-separated cortical regions, forming IED networks. However, the factors prompting IED propagation remain unelucidated. We hypothesized that slow oscillations (SOs) might facilitate IED propagation. Here, the amplitude and phase synchronization of SOs preceding propagating and non-propagating IEDs were compared in 22 patients with focal epilepsy undergoing intracranial electroencephalography (EEG) evaluation. Intracranial channels were categorized into the irritative zone (IZ) and normal zone (NOZ) regarding the presence of IEDs. During wakefulness, we found that pre-IED SOs within the IZ exhibited higher amplitudes for propagating IEDs than non-propagating IEDs (delta band: p = 0.001, theta band: p < 0.001). This increase in SOs was also concurrently observed in the NOZ (delta band: p = 0.04). Similarly, the inter-channel phase synchronization of SOs prior to propagating IEDs was higher than those preceding non-propagating IEDs in the IZ (delta band: p = 0.04). Through sliding window analysis, we observed that SOs preceding propagating IEDs progressively increased in amplitude and phase synchronization, while those preceding non-propagating IEDs remained relatively stable. Significant differences in amplitude occurred approximately 1150 ms before IEDs. During non-rapid eye movement (NREM) sleep, SOs on scalp recordings also showed higher amplitudes before intracranial propagating IEDs than before non-propagating IEDs (delta band: p = 0.006). Furthermore, the analysis of IED density around sleep SOs revealed that only high-amplitude sleep SOs demonstrated correlation with IED propagation. Overall, our study highlights that transient but widely distributed SOs are associated with IED propagation as well as generation in focal epilepsy during sleep and wakefulness, providing new insight into the EEG substrate supporting IED networks.
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Affiliation(s)
- Hongyi Ye
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Nanhu Brain-computer Interface Institute, Hangzhou, China
| | - Lingqi Ye
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Lingli Hu
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yuyu Yang
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yi Ge
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ruotong Chen
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Shan Wang
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Bo Jin
- Department of Neurology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Wenjie Ming
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhongjin Wang
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Sha Xu
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Cenglin Xu
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yi Wang
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yao Ding
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Junming Zhu
- Department of Neurosurgery and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Meiping Ding
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhong Chen
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Shuang Wang
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Nanhu Brain-computer Interface Institute, Hangzhou, China.
| | - Cong Chen
- Department of Neurology and Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
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5
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Zheng Y, Xu C, Sun J, Ming W, Dai S, Shao Y, Qiu X, Li M, Shen C, Xu J, Fei F, Fang J, Jiang X, Zheng G, Hu W, Wang Y, Wang S, Ding M, Chen Z. Excitatory somatostatin interneurons in the dentate gyrus drive a widespread seizure network in cortical dysplasia. Signal Transduct Target Ther 2023; 8:186. [PMID: 37193687 DOI: 10.1038/s41392-023-01404-9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 02/19/2023] [Accepted: 03/05/2023] [Indexed: 05/18/2023] Open
Abstract
Seizures due to cortical dysplasia are notorious for their poor prognosis even with medications and surgery, likely due to the widespread seizure network. Previous studies have primarily focused on the disruption of dysplastic lesions, rather than remote regions such as the hippocampus. Here, we first quantified the epileptogenicity of the hippocampus in patients with late-stage cortical dysplasia. We further investigated the cellular substrates leading to the epileptic hippocampus, using multiscale tools including calcium imaging, optogenetics, immunohistochemistry and electrophysiology. For the first time, we revealed the role of hippocampal somatostatin-positive interneurons in cortical dysplasia-related seizures. Somatostatin-positive were recruited during cortical dysplasia-related seizures. Interestingly, optogenetic studies suggested that somatostatin-positive interneurons paradoxically facilitated seizure generalization. By contrast, parvalbumin-positive interneurons retained an inhibitory role as in controls. Electrophysiological recordings and immunohistochemical studies revealed glutamate-mediated excitatory transmission from somatostatin-positive interneurons in the dentate gyrus. Taken together, our study reveals a novel role of excitatory somatostatin-positive neurons in the seizure network and brings new insights into the cellular basis of cortical dysplasia.
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Affiliation(s)
- Yang Zheng
- Department of Neurology, Zhejiang Provincial Hospital of Chinese Medicine, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310060, China
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
- Epilepsy Center, Department of Neurology, Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Cenglin Xu
- Department of Neurology, Zhejiang Provincial Hospital of Chinese Medicine, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310060, China.
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China.
- Epilepsy Center, Department of Neurology, Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, 310009, China.
| | - Jinyi Sun
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Wenjie Ming
- Epilepsy Center, Department of Neurology, Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Sijie Dai
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Yuying Shao
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Xiaoyun Qiu
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Menghan Li
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Chunhong Shen
- Epilepsy Center, Department of Neurology, Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Jinghong Xu
- Epilepsy Center, Department of Neurology, Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Fan Fei
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Jiajia Fang
- Department of Neurology, Fourth Affiliated Hospital of Zhejiang University School of Medicine, Yiwu, 322000, China
| | - Xuhong Jiang
- Department of Neurology, Zhejiang Provincial Hospital of Chinese Medicine, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310060, China
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Guoqing Zheng
- Department of Neurology, Zhejiang Provincial Hospital of Chinese Medicine, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310060, China
| | - Weiwei Hu
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Yi Wang
- Department of Neurology, Zhejiang Provincial Hospital of Chinese Medicine, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310060, China
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
- Epilepsy Center, Department of Neurology, Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Shuang Wang
- Epilepsy Center, Department of Neurology, Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Meiping Ding
- Epilepsy Center, Department of Neurology, Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, 310009, China.
| | - Zhong Chen
- Department of Neurology, Zhejiang Provincial Hospital of Chinese Medicine, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310060, China.
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China.
- Epilepsy Center, Department of Neurology, Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, 310009, China.
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Chen C, Wang Y, Ye L, Xu J, Ming W, Liu X, Hu L, Ye H, Xu C, Wang Y, Wang Z, Ding Y, Zhu J, Ding M, Chen Z, Wang S. A region-specific modulation of sleep slow waves on interictal epilepsy markers in focal epilepsy. Epilepsia 2023; 64:973-985. [PMID: 36695000 DOI: 10.1111/epi.17518] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 09/30/2022] [Revised: 01/23/2023] [Accepted: 01/23/2023] [Indexed: 01/26/2023]
Abstract
OBJECTIVE Sleep strongly activates interictal epileptic activity through an unclear mechanism. We investigated how scalp sleep slow waves (SSWs), whose positive and negative half-waves reflect the fluctuation of neuronal excitability between the up and down states, respectively, modulate interictal epileptic events in focal epilepsy. METHODS Simultaneous polysomnography was performed in 45 patients with drug-resistant focal epilepsy during intracranial electroencephalographic recording. Scalp SSWs and intracranial spikes and ripples (80-250 Hz) were detected; ripples were classified as type I (co-occurring with spikes) or type II (occurring alone). The Hilbert transform was used to analyze the distributions of spikes and ripples in the phases of SSWs. RESULTS Thirty patients with discrete seizure-onset zone (SOZ) and discernable sleep architecture were included. Intracranial spikes and ripples accumulated around the negative peaks of SSWs and increased with SSW amplitude. Phase analysis revealed that spikes and both ripple subtypes in SOZ were similarly facilitated by SSWs exclusively during down state. In exclusively irritative zones outside SOZ (EIZ), SSWs facilitated spikes and type I ripples across a wider range of phases and to a greater extent than those in SOZ. The type II and type I ripples in EIZ were modulated by SSWs in different patterns. Ripples in normal zones decreased specifically during the up-to-down transition and then increased after the negative peak of SSW, with a characteristically high post-/pre-negative peak ratio. SIGNIFICANCE SSWs modulate interictal events in an amplitude-dependent and region-specific pattern. Pathological ripples and spikes were facilitated predominantly during the cortical down state. Coupling analysis of SSWs could improve the discrimination of pathological and physiological ripples and facilitate seizure localization.
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Affiliation(s)
- Cong Chen
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yunling Wang
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Department of Neurology, Tongde Hospital of Zhejiang Province, Hangzhou, China
| | - Lingqi Ye
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiahui Xu
- Department of Neurology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Wenjie Ming
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaochen Liu
- College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, China
| | - Lingli Hu
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hongyi Ye
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Cenglin Xu
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yi Wang
- Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhongjing Wang
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yao Ding
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Junming Zhu
- Department of Neurosurgery, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Meiping Ding
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhong Chen
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Shuang Wang
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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7
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Hu L, Xiong K, Ye L, Yang Y, Chen C, Wang S, Ding Y, Wang Z, Ming W, Zheng Z, Jiang H, Li H, Zhu J, Xu C, Wang Y, Ding M, Chen Z, Wu Y, Wang S. Ictal EEG desynchronization during low-voltage fast activity for prediction of surgical outcomes in focal epilepsy. J Neurosurg 2022:1-10. [PMID: 36681967 DOI: 10.3171/2022.11.jns221469] [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: 06/22/2022] [Accepted: 11/15/2022] [Indexed: 12/24/2022]
Abstract
OBJECTIVE The authors investigated alterations in functional connectivity (FC) and EEG power during ictal onset patterns of low-voltage fast activity (LVFA) in drug-resistant focal epilepsy. They hypothesized that such changes would be useful to classify epilepsy surgical outcomes. METHODS In a cohort of 79 patients with drug-resistant focal epilepsy who underwent stereoelectroencephalography (SEEG) evaluation as well as resective surgery, FC changes during the peri-LVFA period were measured using nonlinear regression (h2) and power spectral properties within/between three regions: the seizure onset zone (SOZ), early propagation zone (PZ), and noninvolved zone (NIZ). Desynchronization and power desynchronization h2 indices were calculated to assess the degree of EEG desynchronization during LVFA. Multivariate logistic regression was employed to control for confounding factors. Finally, receiver operating characteristic curves were generated to evaluate the performance of desynchronization indices in predicting surgical outcome. RESULTS Fifty-three patients showed ictal LVFA and distinct zones of the SOZ, PZ, and NIZ. Among them, 39 patients (73.6%) achieved seizure freedom by the final follow-up. EEG desynchronization, measured by h2 analysis, was found in the seizure-free group during LVFA: FC decreased within the SOZ and between regions compared with the pre-LVFA and post-LVFA periods. In contrast, the non-seizure-free group showed no prominent EEG desynchronization. The h2 desynchronization index, but not the power desynchronization index, enabled classification of seizure-free versus non-seizure-free patients after resective surgery. CONCLUSIONS EEG desynchronization during the peri-LVFA period, measured by within-zone and between-zone h2 analysis, may be helpful for identifying patients with favorable postsurgical outcomes and also may potentially improve epileptogenic zone identification in the future.
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Affiliation(s)
- Lingli Hu
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Kai Xiong
- 2School of Computer Science and Technology, Zhejiang University, Hangzhou
| | - Lingqi Ye
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Yuyu Yang
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Cong Chen
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Shan Wang
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Yao Ding
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Zhongjin Wang
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Wenjie Ming
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Zhe Zheng
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Hongjie Jiang
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Hong Li
- 3Department of Radiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou; and
| | - Junming Zhu
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Cenglin Xu
- 4Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yi Wang
- 4Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Meiping Ding
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
| | - Zhong Chen
- 4Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, School of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yingcai Wu
- 2School of Computer Science and Technology, Zhejiang University, Hangzhou
| | - Shuang Wang
- 1Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou
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Ming W, Huang B, Zheng S, Bai Y, Wang J, Wang J, Li J. Flexoelectric engineering of van der Waals ferroelectric CuInP 2S 6. Sci Adv 2022; 8:eabq1232. [PMID: 35984879 PMCID: PMC9390982 DOI: 10.1126/sciadv.abq1232] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 07/08/2022] [Indexed: 05/28/2023]
Abstract
Van der Waals layered CuInP2S6 (CIPS) is an ideal candidate for developing two-dimensional microelectronic heterostructures because of its room temperature ferroelectricity, although field-driven polarization reversal of CIPS is intimately coupled with ionic migration, often causing erratic and damaging switching that is highly undesirable for device applications. In this work, we develop an alternative switching mechanism for CIPS using flexoelectric effect, abandoning external electric fields altogether, and the method is motivated by strong correlation between polarization and topography variation of CIPS. Phase-field simulation identifies a critical radius of curvature around 5 μm for strain gradient to be effective, which is realized by engineered topographic surfaces using silver nanowires and optic grating upon which CIPS is transferred to. We also demonstrate mechanical modulation of CIPS on demand via strain gradient underneath a scanning probe, making it possible to engineer multiple polarization states of CIPS for device applications.
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Affiliation(s)
- Wenjie Ming
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
- School of Materials Science and Engineering, Hunan Provincial Key Laboratory of Thin Film Materials and Devices, Xiangtan University, Xiangtan, Hunan 411105, China
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Boyuan Huang
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
- Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Sizheng Zheng
- Department of Engineering Mechanics, School of Aeronautics and Astronautics, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Yinxin Bai
- Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Junling Wang
- Department of Physics, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Jie Wang
- Department of Engineering Mechanics, School of Aeronautics and Astronautics, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Zhejiang Laboratory, Hangzhou, Zhejiang 311100, China
| | - Jiangyu Li
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
- Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
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He C, Chen C, Yang Y, Hu L, Jin B, Ming W, Wang Z, Ding Y, Ding M, Wang S, Wang S. Clinical Characteristics and Prognostic Significance of Subclinical Seizures in Focal Epilepsy: A Retrospective Study. Neurol Ther 2022; 11:763-779. [PMID: 35378679 PMCID: PMC9095772 DOI: 10.1007/s40120-022-00342-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 03/09/2022] [Indexed: 11/24/2022] Open
Abstract
INTRODUCTION The aim was to evaluate the clinical characteristics and prognostic significance of subclinical seizures (SCSs) on scalp video-electroencephalogram (VEEG) monitoring with or without intracranial electroencephalogram (IEEG) monitoring in patients who had epilepsy surgery. METHODS We reviewed 286 epileptic patients who underwent subsequent epilepsy surgery during scalp-VEEG evaluation with or without IEEG monitoring between 2013 and 2020, with a minimum follow-up of 1 year. The prevalence and clinical characteristics of SCSs, as well as their prognostic significance, were analyzed. RESULTS A total of 286 patients were enrolled for analysis, and 80 patients had IEEG implanted. SCSs were recorded in 9.79% of the patients based on VEEG and 50% based on IEEG. In the VEEG group (n = 286), younger seizure onset (P = 0.004) was associated with the presence of s-SCSs (SCSs detected on scalp VEEG). In the IEEG group (n = 80), temporal lobe epilepsy (P = 0.015) was associated with the presence of i-SCSs (SCSs detected on IEEG). Of 286 patients, 208 (72.73%) were seizure-free in the VEEG group, and 56 0f 80 patients (70%) were seizure-free in the IEEG group through the last follow-up. In the VEEG group, the presence of s-SCSs did not affect seizure outcome; predictors of seizure recurrence were longer epilepsy duration (P = 0.003, OR 1.003, 95% CI 1.001-1.005), history of focal to bilateral tonic-clonic seizure (P = 0.027, OR 1.665, 95% CI 1.060-2.613), nonspecific pathology (P = 0.018, OR 2.184, 95% CI 1.145-4.163), and incomplete resection (P = 0.004, OR 2.705, 95% CI 1.372-5.332). In the IEEG group, i-SCSs were significantly associated with seizure outcome (P = 0.028, OR 0.371, 95% CI 0.153-0.898). CONCLUSION The rate of SCSs captured on IEEG monitoring was higher than that on VEEG monitoring during presurgical evaluation. SCSs detected on VEEG monitoring were associated with younger seizure onset. SCSs detected on IEEG monitoring were associated with temporal lobe epilepsy and also predicted surgical outcomes in focal epilepsy.
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Affiliation(s)
- Chenmin He
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Cong Chen
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Yuyu Yang
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Lingli Hu
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Bo Jin
- Department of Neurology, Zhejiang Provincial People's Hospital, Hangzhou, China
| | - Wenjie Ming
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Zhongjin Wang
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Yao Ding
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Meiping Ding
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
| | - Shuang Wang
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China.
| | - Shan Wang
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China.
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Zheng X, Ming W, Liu P, Zhang J, Zhou H, Chen M, Li W, Huang B, Wang H, Yang C. Ionic migration induced loss analysis of perovskite solar cells: a poling study. Phys Chem Chem Phys 2022; 24:7805-7814. [PMID: 35297453 DOI: 10.1039/d1cp05450c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Understanding the interplay between ionic migration and defect trapping in photovoltaic perovskites is critical to develop targeted passivation techniques for performance enhancement. In this study, systematic poling experiments on Cs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 perovskite solar cells (PSCs) were conducted to resolve the principal effects of bias dependent pretreatment effects due to dynamic ionic migration. We find that under negative polarizations, iodine ion accumulation at perovskite/electron transport layer (ETL) interfaces causes enhanced global non-radiative recombination in PSCs and significant open-circuit voltage (Voc) losses. On the other hand, dramatic short-circuit current (Jsc) reduction occurs in positively polarized devices, which is ascribed to ineffective charge collection due to modified band-bending towards both charge transport materials. Spatiotemporally scanning probe microscopy on the surface of polarized perovskites provides an in situ estimation of iodine diffusion mobility and visualization of reorganizations under an external bias. Moreover, our findings suggest that the precondition effect of PSCs under operation due to defect ions is recoverable, therefore achieving a respectable lifetime of PSCs for commercialization is promising.
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Affiliation(s)
- Xue Zheng
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Wenjie Ming
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
- Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, and School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Pingping Liu
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Jie Zhang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Hongfei Zhou
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Ming Chen
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Weimin Li
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Boyuan Huang
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, Guangdong, China
| | - Huan Wang
- School of Electrical Engineering and Automation, Hefei University of Technology, Hefei, 230009, China
| | - Chunlei Yang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
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Wang Y, He C, Chen C, Wang Z, Ming W, Qiu J, Ying M, Chen W, Jin B, Li H, Ding M, Wang S. Focal cortical dysplasia links to sleep-related epilepsy in symptomatic focal epilepsy. Epilepsy Behav 2022; 127:108507. [PMID: 34968776 DOI: 10.1016/j.yebeh.2021.108507] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/11/2021] [Accepted: 12/12/2021] [Indexed: 01/30/2023]
Abstract
OBJECTIVE In sleep-related epilepsy (SRE), epileptic seizures predominantly occur during sleep, but the clinical characteristics of SRE remain elusive. We aimed to identify the clinical features associated with the occurrence of SRE in a large cohort of symptomatic focal epilepsy. METHODS We retrospectively included patients with four etiologies, including focal cortical dysplasia (FCD), low-grade tumors (LGT), temporal lobe epilepsy with hippocampal sclerosis (TLE-HS), and encephalomalacia. SRE was defined as more than 70% of seizures occurring during sleep according to the seizure diary. The correlation between SRE and other clinical variables, such as etiology of epilepsy, pharmacoresistance, seizure frequency, history of bilateral tonic-clonic seizures, and seizure localization was analyzed. RESULTS A total of 376 patients were included. Among them 95 (25.3%) were classified as SRE and the other 281(74.7%) as non-SRE. The incidence of SRE was 53.5% in the FCD group, which was significantly higher than the other three groups (LGT: 19.0%; TLE-HS: 9.9%; encephalomalacia: 16.7%; P < 0.001). The etiology of FCD (p < 0.001) was significantly associated with SRE (OR: 9.71, 95% CI: 3.35-28.14) as an independent risk factor. In addition, small lesion size (p = 0.009) of FCD further increased the risk of SRE (OR: 3.18, 95% CI: 1.33-7.62) in the FCD group. SIGNIFICANCE Our data highlight that FCD markedly increased the risk of sleep-related epilepsy independently of seizure localization. A small lesion of FCD further increased the risk of sleep-related epilepsy by 2.18 times in the FCD group.
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Affiliation(s)
- Yunling Wang
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China; Department of Neurology, Tongde Hospital of Zhejiang Province, Hangzhou, China
| | - Chenmin He
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Cong Chen
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Zhongjin Wang
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Wenjie Ming
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Jingjing Qiu
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Meiping Ying
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Wei Chen
- Department of Neurology, Linhai Second People's Hospital, Taizhou, China
| | - Bo Jin
- Department of Neurology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Hong Li
- Department of Radiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Meiping Ding
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Shuang Wang
- Department of Neurology, Epilepsy Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
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Zheng Z, Jiang H, Wu H, Ding Y, Wang S, Ming W, Zhu J. Epilepsy surgery for low-grade epilepsy-associated neuroepithelial tumor of temporal lobe: a single-institution experience of 61 patients. Neurol Sci 2021; 43:3333-3341. [PMID: 34816317 PMCID: PMC9018634 DOI: 10.1007/s10072-021-05703-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 10/27/2021] [Indexed: 11/24/2022]
Abstract
Background Low-grade epilepsy-associated neuroepithelial tumor (LEAT) is highly responsive to surgery in general. The appropriate surgical strategy remains controversial in temporal LEAT. The aim of this study is to analyze the surgical seizure outcome of temporal LEAT, focusing on the aspects of surgical strategy. Methods Sixty-one patients from a single epilepsy center with temporal LEAT underwent surgery. The surgical strategy was according to the multidisciplinary presurgical evaluation. Electrocorticogram (ECoG)-assisted resection was utilized. Surgical extent including lesionectomy and extended resection was described in detail. Seizure outcome was classified as satisfactory (Engel class I) and unsatisfactory (Engel classes II–IV). Results After a median follow-up of 36.0 (30.0) months, 83.6% of patients achieved satisfactory outcome, including 72.1% with Engel class Ia. There was 39.3% (24/61) of patients with antiepileptic drug (AED) withdrawal. Use of ECoG (χ2 = 0.000, P > 0.1), preresection spike (χ2 = 0.000, P = 0.763), or spike residue (P = 0.545) was not correlated with the seizure outcome. For lateral temporal LEAT, outcome from lesionectomy was comparable to extended resection (χ2 = 0.499, P > 0.1). For mesial temporal LEAT, 94.7% (18/19) of patients who underwent additional hippocampectomy were satisfactory, whereas only 25% (1/4) of patients who underwent lesionectomy were satisfactory (P = 0.009). Conclusion Surgical treatment was highly effective for temporal LEAT. ECoG may not influence the seizure outcome. For lateral temporal LEAT, lesionectomy with or without cortectomy was sufficient in most patients. For mesial temporal LEAT, extended resection was recommended.
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Affiliation(s)
- Zhe Zheng
- Epilepsy Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
- Department of Neurosurgery The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
| | - Hongjie Jiang
- Epilepsy Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
- Department of Neurosurgery The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
| | - Hemmings Wu
- Epilepsy Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
- Department of Neurosurgery The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
| | - Yao Ding
- Epilepsy Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
| | - Shuang Wang
- Epilepsy Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
| | - Wenjie Ming
- Epilepsy Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
- Department of Neurology, The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China
| | - Junming Zhu
- Epilepsy Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China.
- Department of Neurosurgery The Second Affiliated Hospital, Zhejiang University School of Medicine, No. 88 Jiefang Road, Shangchen District, Hangzhou, 310009, China.
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Guo Y, Liu Y, Ming W, Wang Z, Zhu J, Chen Y, Yao L, Ding M, Shen C. Distinguishing Focal Cortical Dysplasia From Glioneuronal Tumors in Patients With Epilepsy by Machine Learning. Front Neurol 2020; 11:548305. [PMID: 33329300 PMCID: PMC7732488 DOI: 10.3389/fneur.2020.548305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 10/14/2020] [Indexed: 11/13/2022] Open
Abstract
Purpose: We are aiming to build a supervised machine learning-based classifier, in order to preoperatively distinguish focal cortical dysplasia (FCD) from glioneuronal tumors (GNTs) in patients with epilepsy. Methods: This retrospective study was comprised of 96 patients who underwent epilepsy surgery, with the final neuropathologic diagnosis of either an FCD or GNTs. Seven classical machine learning algorithms (i.e., Random Forest, SVM, Decision Tree, Logistic Regression, XGBoost, LightGBM, and CatBoost) were employed and trained by our dataset to get the classification model. Ten features [i.e., Gender, Past history, Age at seizure onset, Course of disease, Seizure type, Seizure frequency, Scalp EEG biomarkers, MRI features, Lesion location, Number of antiepileptic drug (AEDs)] were analyzed in our study. Results: We enrolled 56 patients with FCD and 40 patients with GNTs, which included 29 with gangliogliomas (GGs) and 11 with dysembryoplasic neuroepithelial tumors (DNTs). Our study demonstrated that the Random Forest-based machine learning model offered the best predictive performance on distinguishing the diagnosis of FCD from GNTs, with an F1-score of 0.9180 and AUC value of 0.9340. Furthermore, the most discriminative factor between FCD and GNTs was the feature "age at seizure onset" with the Chi-square value of 1,213.0, suggesting that patients who had a younger age at seizure onset were more likely to be diagnosed as FCD. Conclusion: The Random Forest-based machine learning classifier can accurately differentiate FCD from GNTs in patients with epilepsy before surgery. This might lead to improved clinician confidence in appropriate surgical planning and treatment outcomes.
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Affiliation(s)
- Yi Guo
- Department of General Practice, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China.,Epilepsy Center, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Yushan Liu
- School of Computer Science, Fudan University, Shanghai, China
| | - Wenjie Ming
- Epilepsy Center, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China.,Department of Neurology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Zhongjin Wang
- Epilepsy Center, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China.,Department of Neurology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Junming Zhu
- Epilepsy Center, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China.,Department of Neurosurgery, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Yang Chen
- School of Computer Science, Fudan University, Shanghai, China
| | - Lijun Yao
- Shanghai Pudong New Area Mental Health Center, Tongji University School of Medicine, Shanghai, China
| | - Meiping Ding
- Epilepsy Center, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China.,Department of Neurology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Chunhong Shen
- Epilepsy Center, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China.,Department of Neurology, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
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Lei L, Kang S, Meng L, Jianwei Z, Kui W, Ming W. 243P Target sequencing of 508 genes in Chinese epithelial ovarian cancer patients. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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15
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Xu W, Gao Y, Ming W, He F, Li J, Zhu XH, Kang F, Li J, Wei G. Suppressing Defects-Induced Nonradiative Recombination for Efficient Perovskite Solar Cells through Green Antisolvent Engineering. Adv Mater 2020; 32:e2003965. [PMID: 32767422 DOI: 10.1002/adma.202003965] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Indexed: 06/11/2023]
Abstract
Organic-inorganic hybrid perovskites have attracted considerable attention due to their superior optoelectronic properties. Traditional one-step solution-processed perovskites often suffer from defects-induced nonradiative recombination, which significantly hinders the improvement of device performance. Herein, treatment with green antisolvents for achieving high-quality perovskite films is reported. Compared to defects-filled ones, perovskite films by antisolvent treatment using methylamine bromide (MABr) in ethanol (MABr-Eth) not only enhances the resultant perovskite crystallinity with large grain size, but also passivates the surface defects. In this case, the engineering of MABr-Eth-treated perovskites suppressing defects-induced nonradiative recombination in perovskite solar cells (PSCs) is demonstrated. As a result, the fabricated inverted planar heterojunction device of ITO/PTAA/Cs0.15 FA0.85 PbI3 /PC61 BM/Phen-NADPO/Ag exhibits the best power conversion efficiency of 21.53%. Furthermore, the corresponding PSCs possess a better storage and light-soaking stability.
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Affiliation(s)
- Wenzhan Xu
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518000, China
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518000, China
| | - Yu Gao
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518000, China
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518000, China
| | - Wenjie Ming
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences, Shenzhen, 518055, China
- School of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Fang He
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518000, China
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518000, China
| | - Jingzhou Li
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518000, China
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518000, China
| | - Xu-Hui Zhu
- State Key Laboratory of Luminescent Materials and Devices (SKLLMD), South China University of Technology (SCUT), Guangzhou, 510640, China
| | - Feiyu Kang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518000, China
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518000, China
| | - Jiangyu Li
- Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Guodan Wei
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518000, China
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518000, China
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LUAN Z, Huo X, Ming W, Sun X, Du C, Luo Z, Zhou Y, He Y, Chen L, Zhang X, Guan Y. SUN-042 PREGNANE X RECEPTOR (PXR) IS A NOVEL THERAPEUTIC TARGET FOR THE TREATMENT OF CISPLATIN-INDUCED NEPHROTOXICITY IN MICE. Kidney Int Rep 2020. [DOI: 10.1016/j.ekir.2020.02.565] [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: 11/28/2022] Open
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Ming W, Wang Y, Han JB, Qu JL. [Clinical application of rigid tracheoscopy in adult cervical tracheal stenosis]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:176-178. [PMID: 30808148 DOI: 10.13201/j.issn.1001-1781.2019.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Indexed: 11/12/2022]
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Ming W, Wang Y, Han JB, Zhang W, Dai H, Xu Y, Qu JN. [Efficacy analysis of T type tube dilatation in adult cervical tracheal stenosis]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:372-374. [PMID: 29798297 DOI: 10.13201/j.issn.1001-1781.2018.05.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Indexed: 11/12/2022]
Abstract
Objective:To investigate the efficacy, recurrence and strategy of T silicone tube dilatation for cicatricial stenosis of cervical trachea in adults.Method:Cinical data of 37 cases with the cervical tracheal stenosis were retrospectively analyzed, who were firstly treated by T shape silicone tube dilation for at least 10 months, from Jun 2006 to Jun 2016.Result:In 37 adult patients with cicatricial stenosis of the trachea, 29 cases were caused by tracheal intubation or incision, 6 cases were traumatic, and 2 cases were multiple osteochondritis. Twentythree cases were experienced one time surgery and extubated successfully, 8 cases were experienced 2 times and more than 2 times surgery (sternohyoid muscle flap pedicled hyoid bone with T tube expansion in 3 cases, tracheal endoscopic dilatation in 2 cases, T tube dilatation in 3 cases), extubation success rate of 83.7%. Among the 6 cases with failure of extubation, 2 cases were multiple osteochondritis, 3 cases had severe scar constitution, 1 cases were lost of follow-up.Conclusion:T type silicon tube expansion for the treatment of adult cervical tracheal stenosis can be achieved relatively high decannulation rate. For recurrent stenosis, we can consider to use various methods of expansion, and improve the decannulation rate. Intratracheal granulation tissuextubation after exbation should be observed for at least 1 month. For concurrent with polychondritis and severe scar the constitution, the operation should be carefully chosen.
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Affiliation(s)
- W Ming
- Department of Otolaryngology Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, 430060, China
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Nickoloff B, Higgs R, Rodgers G, Ming W, Qian Y, Bivi N, Siegel R, Konrad R. LB1506 Novel immunoassay for Serum IL-19 reflects disease activity in psoriasis. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.06.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Wu H, Wang Z, Ming W, Wang S, Ding M. [Monitoring time of interictal epileptiform discharges by long-term video EEG in patients with epilepsy]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2017; 46:30-35. [PMID: 28436628 PMCID: PMC10397096 DOI: 10.3785/j.issn.1008-9292.2017.02.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To optimize the monitoring time of interictal epileptiform discharges (IED) in patients with epilepsy by long-term video electroencephalogram (VEEG). Methods: The cumulative percentages of IED detected by VEEG in 346 epilepsy patients (349 times) with different purposes, different waking sleep states and different MRI findings were retrospectively analyzed. According to the purposes, there were 164 patients (165 times) for clarifying diagnosis, 124 patients (124 times) for preoperative evaluation and 58 patients (60 times) for adjustment of medications. According to MRI results, there were responsible lesions in 98 patients (98 times) and no responsible lesions in 173 patients (174 times). Results: Among 346 patients (349 times), IED was detected within 24 h in 231 patients (times). The percentage of detection in patients with purpose of preoperative evaluation was higher than those with purpose of diagnosis and medication adjustment. The detection of LED was gradually increased in first 8 h with 59.0%, then stably in 24 h. 46.8% IED was recorded during sleep time, particularly in the second stage of sleep. The cumulative percentage of IED in patients with abnormal MRI findings was higher in all periods. It reached 83.7% within 8 h, and then tended to be stable. Conclusion: The study shows that LED should be monitored by VEEG at least 8 hours and should include the second stage of sleep in patients with epilepsy. Patients with refractory epilepsy and with abnormal lesions on MRI should record IED more frequently.
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Affiliation(s)
- Han Wu
- Epilepsy Center, Department of Neurology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China; EEG Laboratory, Xinhua Hospital of Zhejiang Province, Hangzhou 310005, China
| | - Zhongjin Wang
- Epilepsy Center, Department of Neurology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China.
| | - Wenjie Ming
- Epilepsy Center, Department of Neurology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Shuang Wang
- Epilepsy Center, Department of Neurology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Meiping Ding
- Epilepsy Center, Department of Neurology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
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Affiliation(s)
- J You
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - W Ming
- The Chinese University of Hong Kong, Shatin, Hong Kong
| | - P Chan
- The Chinese University of Hong Kong, Shatin, Hong Kong
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You J, Ming W, Lin W, Tarn YH. Early Versus Late Ketoanalogs Supplementation In Patients With Chronic Kidney Disease In Taiwan - A Cost-Effectiveness Analysis. Value Health 2014; 17:A470. [PMID: 27201343 DOI: 10.1016/j.jval.2014.08.1331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- J You
- Chinese University of Hong Kong, Shatin, Hong Kong
| | - W Ming
- Chinese University of Hong Kong, Shatin, Hong Kong
| | - W Lin
- Taiwan Pharmacist Association, Taipei, Taiwan
| | - Y H Tarn
- Taiwan Pharmacist Association, Taipei, Taiwan
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Abstract
Damaged surfaces self-replenish their chemical composition by the spontaneous re-orientation of functional groups chemically bonded to the polymer network. The repair of the surface chemistry leads to the recovery of surface functionality. This self-replenishing approach is suitable to recover many surface-related properties and constitutes a major breakthrough in extending the service life-time of functional materials.
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Affiliation(s)
- T Dikić
- Dow Benelux B.V., PO Box 48, 4530 AA, Terneuzen, The Netherlands
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Bin Z, Yong L, Baoshun H, Dinghui L, Ming W, Lin W, Lin C, Jinlai L, Weikang W. Effects of Tongxinluo capsule on homocysteine-induced endothelial dysfuncion and inflammartoy response. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.96] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Bin Z, Baoshun H, Jieming Z, Yong L, Ming W, Lin W, Lin C, Jinlai L, Weikang W. The protective effects of Jiawei Buyang Huanwu decoction on vascular endothelia and mechanism after iliac artery balloon injured in rabbits. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Qin P, Ming W, Liu Y. Surveillance of human infections with Avian influenza in Guangzhou during 1997–2006. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.2091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Baoliang P, Yuwan W, Zhende P, Lifschitz AL, Ming W. Pharmacokinetics of eprinomectin in plasma and milk following subcutaneous administration to lactating dairy cattle. Vet Res Commun 2009; 30:263-70. [PMID: 16437302 DOI: 10.1007/s11259-006-3230-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2004] [Indexed: 10/25/2022]
Abstract
Eprinomectin is only available as a topically applied anthelmintic for dairy cattle. To determine whether eprinomectin can be applied as an injectable formulation in dairy cattle, a novel injectable formulation was developed and was subcutaneously delivered to four lactating dairy cattle at a dose rate of 0.2 mg/ kg. Plasma and milk samples were collected. The concentrations of eprinomectin in all samples were determined by HPLC. The peak plasma concentration (C(max))of 44.0+/-24.2 ng/ml occurred 39+/-19.3 h after subcutaneous administration, equivalent to the C(max) (43.76+/-18.23 ng/ml) previously reported for dairy cattle after a pour-on administration of 0.5 mg/kg eprinomectin. The area under the plasma concentration-time curve (AUC) after subcutaneous administration was 7354+/-1861 (ng h)/ml, higher than that obtained after pour-on delivery (5737.68+/-412.80 (ng h)/ml). The mean residence time (MRT) of the drug in plasma was 211+/-55.2 h. Eprinomectin was detected in the milk at the second sampling time. The concentration of drug in milk was parallel to that in plasma, with a milk to plasma ratio of 0.16+/-0.01. The highest detected concentration of eprinomectin in milk was 9.0 ng/ml, below the maximum residue limit (MRL) of eprinomectin in milk established by the Joint FAO/WHO Expert Committee on Food Additives in 2000. The amount of eprinomectin recovered in the milk during this trial was 0.39%+/-0.08% of the total administered dose. This study demonstrates that subcutaneous administration of eprinomectin led to higher bioavailability and a lower dose than a pour-on application, and that an injectable formulation of eprinomectin may be applied in dairy cattle with a zero withdrawal period.
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Affiliation(s)
- P Baoliang
- College of Veterinary Medicine, China Agricultural University, 100094, Beijing
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Abstract
We report a biomimetic procedure to prepare superhydrophobic cotton textiles. By in situ introducing silica particles to cotton fibers to generate a dual-size surface roughness, followed by hydrophobization with polydimethylsiloxane (PDMS), normally hydrophilic cotton has been easily turned superhydrophobic, which exhibits a static water contact angle of 155 degrees for a 10 microL droplet. The roll-off angle of water droplets depends on the droplet volume, ranging from 7 degrees for a droplet of 50 microL to 20 degrees for a 7 microL droplet. When a perfluoroalkyl chain is introduced to the silica particle surface, the superhydrophobic textile also becomes highly oleophobic, as demonstrated by a static contact angle of 140 degrees and a roll-off angle of 24 degrees for a 15 microL sunflower oil droplet.
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Affiliation(s)
- H F Hoefnagels
- Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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Dikić T, Erich S, Ming W, Huinink H, Thüne P, van Benthem R, de With G. Fluorine depth profiling by high-resolution 1D magnetic resonance imaging. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.05.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Voorn D, Ming W, Laven J, Meuldijk J, de With G, van Herk A. Plate–sphere hybrid dispersions: Heterocoagulation kinetics and DLVO evaluation. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.08.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Dikić T, Ming W, Thüne PC, van Benthem RATM, de With G. Well-defined polycaprolactone precursors for low surface-energy polyurethane films. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/pola.22374] [Citation(s) in RCA: 21] [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: 11/10/2022]
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Voorn DJ, Ming W, van Herk AM. Polymer−Clay Nanocomposite Latex Particles by Inverse Pickering Emulsion Polymerization Stabilized with Hydrophobic Montmorillonite Platelets. Macromolecules 2006. [DOI: 10.1021/ma052539t] [Citation(s) in RCA: 204] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. J. Voorn
- Laboratory of Polymer Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - W. Ming
- Laboratory of Polymer Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - A. M. van Herk
- Laboratory of Polymer Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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Oyman ZO, Ming W, van der Linde R, ter Borg J, Schut A, Bieleman JH. Oxidative drying of alkyd paints catalysed by a dinuclear manganese complex (MnMeTACN). ACTA ACUST UNITED AC 2005. [DOI: 10.1007/bf02699583] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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van de Grampel R, Ming W, van Gennip W, van der Velden F, Laven J, Niemantsverdriet J, van der Linde R. Thermally cured low surface-tension epoxy films. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.08.024] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
We report a robust procedure for preparing superhydrophobic hybrid films on which the advancing contact angle for water is about 165 degrees and the roll-off angle of a 10-muL water droplet is 3 +/- 1 degrees . Dual-size surface roughness, which mimics the surface topology of self-cleaning plant leaves, originates from well-defined silica-based raspberry-like particles that are covalently bonded to an epoxy-based polymer matrix. The roughened surface is chemically modified with a layer of poly(dimethylsiloxane) (PDMS). The robustness and simplicity of this procedure may make widespread applications of so-prepared superhydrophobic films possible.
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Affiliation(s)
- W Ming
- Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
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Voorn DJ, Ming W, van Herk AM, Bomans PHH, Frederik PM, Gasemjit P, Johanssmann D. Controlled heterocoagulation of platelets and spheres. Langmuir 2005; 21:6950-6. [PMID: 16008408 DOI: 10.1021/la050605e] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We report the controlled heterocoagulation of platelets and spheres, leading to the formation of colloidally stable, anisotropic hybrid particles. Anionically charged, nanosized polymer latex spherical particles were heterocoagulated on the surface of cationically charged hexagonal gibbsite platelets via the adsorption of a single layer of spheres onto both sides of the hexagonal platelets. The latex particles were annealed at a temperature above the Tg of the latex polymer, resulting in a thin polymer layer covering the gibbsite platelets. This heterocoagulation approach enabled the encapsulation of hydrophilic inorganic particles with polymer latexes and the formation of anisotropic hybrid particles.
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Affiliation(s)
- D J Voorn
- Laboratories of Polymer Chemistry and of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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Affiliation(s)
- Dirk-Jan Voorn
- Laboratory of Polymer Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Dutch Polymer Institute (DPI), Eindhoven University of Technology, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - W. Ming
- Laboratory of Polymer Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Dutch Polymer Institute (DPI), Eindhoven University of Technology, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Alex M. van Herk
- Laboratory of Polymer Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Dutch Polymer Institute (DPI), Eindhoven University of Technology, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
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Oyman Z, Ming W, van der Linde R, van Gorkum R, Bouwman E. Effect of [Mn(acac)3] and its combination with 2,2′-bipyridine on the autoxidation and oligomerisation of ethyl linoleate. POLYMER 2005. [DOI: 10.1016/j.polymer.2004.12.045] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [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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Oyman Z, Ming W, Micciché F, Oostveen E, van Haveren J, van der Linde R. A promising environmentally-friendly manganese-based catalyst for alkyd emulsion coatings. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.08.052] [Citation(s) in RCA: 39] [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] [Indexed: 11/28/2022]
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van de Grampel RD, Ming W, Gildenpfennig A, van Gennip WJH, Laven J, Niemantsverdriet JW, Brongersma HH, de With G, van der Linde R. The outermost atomic layer of thin films of fluorinated polymethacrylates. Langmuir 2004; 20:6344-6351. [PMID: 15248721 DOI: 10.1021/la049519p] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this paper, we investigate the surface properties of a series of copolymers of perfluoroalkyl methacrylate (CH2 = C(CH3)COOCH2CnF(2n + 1), n = 1, 6, or 10) and methyl methacrylate (MMA) and of blends of perfluorooctyl-end-capped poly(methyl methacrylate) (PMMA) and pure PMMA. The introduction of perfluoroalkyl groups significantly lowers the polymer surface energy as determined by the acid-base approach. X-ray photoelectron spectroscopy (XPS) confirms a higher fluorine concentration in the surface region (the outer 3.8 nm) as compared to in the bulk. The fluorine density in the outermost atomic layer is quantitatively determined by low-energy ion scattering (LEIS). A linear relationship is found between the fluorine density in the outermost atomic layer and the surface energy of the partially fluorinated polymethacrylates, irrespective of the length of the perfluoroalkyl chain. This linearity confirms Langmuir's "principle of independent surface action". Deviation from this linear relationship exists for both highly and sparsely fluorinated polymethacrylates and can be ascribed to the local (surface) ordering of the fluorinated tails and MMA units, respectively. This study may offer one further step toward a deeper understanding of the correlations between macroscopic surface properties and microscopic surface chemical composition.
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Affiliation(s)
- R D van de Grampel
- Laboratory of Coatings Technology, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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van de Grampel RD, Ming W, Gildenpfennig A, Laven J, Brongersma HH, de With G, van der Linde R. Quantification of fluorine density in the outermost atomic layer. Langmuir 2004; 20:145-149. [PMID: 15745012 DOI: 10.1021/la0353071] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The outermost atomic layer of perfluorinated thiol monolayers on gold and poly(tetrafluoroethylene) (PTFE) is analyzed by low-energy ion scattering. Absolute quantification of fluorine density in this layer was achieved after calibrating the fluorine signal with a freshly cleaved LiF(100) single crystal. The fluorine density of monolayers of a C8F17-thiol on gold was 1.48 x 10(15) F atoms/cm2, whereas for PTFE a value of 1.24 x 1015 F atoms/cm2 was observed. This difference was explained by the different tilt angles of the thiol on gold and PTFE chains with respect to the surface normal. Both a configurational and a molecular interpretation on the perfluorinated thiol monolayer on gold are given.
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Affiliation(s)
- R D van de Grampel
- Laboratory of Coatings Technology, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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van Ravenstein L, Ming W, van de Grampel RD, van der Linde R, de With G, Loontjens T, Thüne PC, Niemantsverdriet JW. Low Surface Energy Polymeric Films from Novel Fluorinated Blocked Isocyanates. Macromolecules 2003. [DOI: 10.1021/ma035296i] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- L. van Ravenstein
- Lab of Coatings Technology and Schuit Institute of Catalysis and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | - W. Ming
- Lab of Coatings Technology and Schuit Institute of Catalysis and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | - R. D. van de Grampel
- Lab of Coatings Technology and Schuit Institute of Catalysis and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | - R. van der Linde
- Lab of Coatings Technology and Schuit Institute of Catalysis and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | - G. de With
- Lab of Coatings Technology and Schuit Institute of Catalysis and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | - T. Loontjens
- Lab of Coatings Technology and Schuit Institute of Catalysis and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | - P. C. Thüne
- Lab of Coatings Technology and Schuit Institute of Catalysis and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | - J. W. Niemantsverdriet
- Lab of Coatings Technology and Schuit Institute of Catalysis and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands
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Ming W, Tian M, van de Grampel RD, Melis F, Jia X, Loos J, van der Linde R. Low Surface Energy Polymeric Films from Solventless Liquid Oligoesters and Partially Fluorinated Isocyanates. Macromolecules 2002. [DOI: 10.1021/ma020650i] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- W. Ming
- Laboratory of Coatings Technology and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
| | - M. Tian
- Laboratory of Coatings Technology and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
| | - R. D. van de Grampel
- Laboratory of Coatings Technology and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
| | - F. Melis
- Laboratory of Coatings Technology and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
| | - X. Jia
- Laboratory of Coatings Technology and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
| | - J. Loos
- Laboratory of Coatings Technology and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
| | - R. van der Linde
- Laboratory of Coatings Technology and Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Polymer Science and Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003
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van de Grampel RD, Ming W, Laven J, van der Linde R, Leermakers FAM. A Self-Consistent-Field Analysis of the Surface Structure and Surface Tension of Partially Fluorinated Copolymers: The Influence of Polymer Architecture. Macromolecules 2002. [DOI: 10.1021/ma0121870] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- R. D. van de Grampel
- Laboratory of Polymer Chemistry and Coatings Technology, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Laboratory of Physical and Colloid Science, Wageningen University, P.O. Box 8038, 6700 EK Wageningen, The Netherlands
| | - W. Ming
- Laboratory of Polymer Chemistry and Coatings Technology, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Laboratory of Physical and Colloid Science, Wageningen University, P.O. Box 8038, 6700 EK Wageningen, The Netherlands
| | - J. Laven
- Laboratory of Polymer Chemistry and Coatings Technology, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Laboratory of Physical and Colloid Science, Wageningen University, P.O. Box 8038, 6700 EK Wageningen, The Netherlands
| | - R. van der Linde
- Laboratory of Polymer Chemistry and Coatings Technology, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Laboratory of Physical and Colloid Science, Wageningen University, P.O. Box 8038, 6700 EK Wageningen, The Netherlands
| | - F. A. M. Leermakers
- Laboratory of Polymer Chemistry and Coatings Technology, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Laboratory of Physical and Colloid Science, Wageningen University, P.O. Box 8038, 6700 EK Wageningen, The Netherlands
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Han Y, Liang L, Huang J, Ming W. [The effect of p53 gene on p-glycoprotein expression and chemotherapeutic cytotoxicity of hepatocellular carcinoma]. Zhonghua Gan Zang Bing Za Zhi 2001; 9:237-9. [PMID: 11602059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
OBJECTIVE To test the hypothesis that wild-type p53 regulates the expression of p-glycoprotein. METHODS Hep3B cells which lack the expression of both p53 and retinoblastoma tumor suppressor genes because of deletions, were transfected with a wild-type (wt) p53 cDNA and control vector by a liposome method. RESULTS After G418 selection, stable wt-p53 transformants and control vector transformants (pNeo) were obtained. Northern and Western blot analysis determined the expression of p53 mRNA and protein in wt-p53 transformants, respectively. In wt-p53 transformants, induction of transcriptionally active p53 was confirmed by the increase of P21(waf1/cip1) protein. Levels of P-gp reduced in the cells expressing wild-type p53 were linked to wt-p53 activity. Cytotoxicity assays revealed that the wt-p53 transfectants were more sensitive to doxorubicin and mitomycin compared with the pNeo transformants. Flow cytometry showed that the accumulation of doxorubicin in wt-p53 transfectants was as 13 times as that of the pNeo transformants. CONCLUSIONS Restoration of wt-p53 activity in Hep3B leads to sensitiveness to chemotherapeutic agents because of the decrease of p-glycoprotein expression.
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Affiliation(s)
- Y Han
- Department of Hepatobiliary Surgery, First Affiliated Hospital of Sun Yat-sen University of Medical Sciences. Guangzhou 510080, China
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Cao X, Fu Z, Ming W, Yang R, Cheng H. Effects of acute or prolonged exposure to leptin on hepatic glucose oxidation. Chin Med J (Engl) 2001; 114:592-5. [PMID: 11780433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
OBJECTIVE To observe the short-term and long-term effects of leptin on hepatic glucose oxidation and glucokinase gene expression. METHODS Rat hepatic cell line BRL was incubated with leptin of different doses (range from 10 ng/ml-200 ng/ml) for 1 h or 24 h. Glucose oxidation was determined by liquid scintillation counting. Glucokinase gene expression (corrected by beta-actin) was determined by reverse transcription semi-quantitative polymerase chain reaction. RESULTS Treatment with leptin 10 ng/ml for 1 h had no significant effects on glucose oxidation in hepatic cells. However, at the doses ranging from 50 ng/ml to 200 ng/ml, leptin significantly inhibited glucose oxidation. These effects disappeared when the hepatic cells were exposed to leptin for 24 h. Glucokinase mRNA expression was reduced significantly after both 1 h and 24 h exposure to leptin (100 ng/ml) as compared to that of the control group. CONCLUSION A low dose of leptin has no significant effect on glucose oxidation in hepatic cells. A relatively high dose of leptin has an acute inhibitory effect on the glucose oxidation in hepatic cells. This effect may likely involve the inhibition of glucokinase gene expression. The inhibitory effect on glucose oxidation is transient and disappears with prolonged exposure time.
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Affiliation(s)
- X Cao
- Department of Endocrinology, First Affiliated Hospital, Sun Yat-sen University of Medical Sciences, Guangzhou 510080, China.
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Cui Y, Ming W, Yin W, Ren Z, Wang J, Gu J. [High level expression of human recombinant albumin gene in the yeast Pichia pastoris]. Wei Sheng Wu Xue Bao 2001; 41:244-7. [PMID: 12549034] [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: 04/19/2023]
Abstract
The yeast Pichia pastoris was transformed by the multi-copy Pichia expression vector that can express secreted human albumin. The high level expression of cell line was selected after screening. The expression of human recombinant albumin in Pichia pastoris induced by different methods were compared. The ratio of secreted human albumin is 80% in total secreted proteins and the expression level reaches as high as is 10 g/L.
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Affiliation(s)
- Y Cui
- Research Center of Molecular Medicine, Sun Yat-Sen University of Medical Sciences, Guangzhou 510089, China
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