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Saikia A, Mejicanos G, Rothy J, Rajendiran E, Yang C, Nyachoti M, Lei H, Bergsma R, Wu Y, Jin S, Rodas-Gonzalez A. Pork carcass composition, meat and belly qualities as influenced by feed efficiency selection in replacement boars from Large White sire and dam lines. Meat Sci 2024; 210:109423. [PMID: 38218007 DOI: 10.1016/j.meatsci.2023.109423] [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: 03/27/2023] [Revised: 12/24/2023] [Accepted: 12/28/2023] [Indexed: 01/15/2024]
Abstract
This study evaluated carcass attributes, meat and belly qualities in finisher boars (n = 79) selected for feed efficiency (low, intermediate and high) based on estimated breeding value for feed conversion ratio within a Large White dam and sire genetic lines. The sire line had lower trimmed fat proportions and higher lean than the dam line (P < 0.01). Genetic lines expressed slight colour changes and drip losses (P < 0.05), with no differences in pH, marbling and cooking traits (P > 0.05). High-efficient animals presented the highest lean yield (P < 0.01), the lowest trimmed fat proportion (P < 0.01) and no effect on meat and belly quality attributes (P > 0.05) compared with other efficient groups. Interaction between efficiency group and genetic line was only detected for belly weight and thickness (P < 0.01). High-efficient animals offer a greater leanness level, with minimal impact on meat and belly quality traits.
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Affiliation(s)
- A Saikia
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - G Mejicanos
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - J Rothy
- Food Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - E Rajendiran
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - C Yang
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - M Nyachoti
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - H Lei
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; Topigs Norsvin Canada Inc., Oak Bluff, MB R4G 0C4, Canada
| | - R Bergsma
- Topigs Norsvin Research Centre, Beuningen, the Netherlands
| | - Y Wu
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - S Jin
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - A Rodas-Gonzalez
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
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2
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Xiao S, Lin R, Ye H, Li C, Luo Y, Wang G, Lei H. Effect of contact precautions on preventing meticillin-resistant Staphylococcus aureus transmission in intensive care units: a review and modelling study of field trials. J Hosp Infect 2024; 144:66-74. [PMID: 38036001 DOI: 10.1016/j.jhin.2023.09.023] [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: 07/15/2023] [Revised: 09/04/2023] [Accepted: 09/06/2023] [Indexed: 12/02/2023]
Abstract
BACKGROUND Contact precautions (CPs) have been widely implemented in hospitals, particularly in intensive care units (ICUs), as the standard approach for managing meticillin-resistant Staphylococcus aureus (MRSA). However, the effectiveness of CPs in preventing MRSA transmission remains a subject of debate. AIM To assess the effectiveness of CPs in reducing MRSA transmission within ICUs. METHODS A comprehensive analysis was conducted using data from 16 sets of parameters collected from 13 field studies investigating the effectiveness of CPs in ICUs, and an epidemiologic model was developed to simulate the dynamics of MRSA incidence in the hospital setting. FINDINGS The analysis demonstrated a mean reduction of 20.52% (95% confidence interval -30.52 to 71.60%) in the MRSA transmission rate associated with the implementation of CPs. Furthermore, reducing the time-delay of screening tests and increasing the percentage of patients identified with MRSA through screening at admission were found to contribute to the effectiveness of CPs. CONCLUSION Proper implementation of CPs, with a particular emphasis on early identification of MRSA-colonized/infected patients, demonstrated a strong association with reduced MRSA transmission within the hospital setting. However, further research is necessary to investigate the effectiveness and safety of decolonization and other interventions used in conjunction with CPs to mitigate the risk of infection among colonized patients.
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Affiliation(s)
- S Xiao
- School of Public Health, Shenzhen Campus of Sun Yat-sen University, Shenzhen, PR China; School of Public Health, Sun Yat-sen University, Guangzhou, PR China
| | - R Lin
- School of Public Health, Shenzhen Campus of Sun Yat-sen University, Shenzhen, PR China; School of Public Health, Sun Yat-sen University, Guangzhou, PR China
| | - H Ye
- Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, PR China; Centre of Environmental and Health Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, PR China
| | - C Li
- School of Public Health, Shenzhen Campus of Sun Yat-sen University, Shenzhen, PR China; School of Public Health, Sun Yat-sen University, Guangzhou, PR China
| | - Y Luo
- School of Public Health, Shenzhen Campus of Sun Yat-sen University, Shenzhen, PR China; School of Public Health, Sun Yat-sen University, Guangzhou, PR China
| | - G Wang
- Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, PR China
| | - H Lei
- School of Public Health, Zhejiang University, Hangzhou, PR China.
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Zhang Y, Yuan N, Liu B, Yang A, Yu H, Lv K, Luan J, Hu P, Lei H, Wang T, Ma G, Lei B. USBDAN: Unsupervised Scale-aware and Boundary-aware Domain Adaptive Network for Gastric Tumor Segmentation. Annu Int Conf IEEE Eng Med Biol Soc 2023; 2023:1-4. [PMID: 38082801 DOI: 10.1109/embc40787.2023.10340877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Accurate segmentation of gastric tumors from computed tomography (CT) images provides useful image information for guiding the diagnosis and treatment of gastric cancer. Researchers typically collect datasets from multiple medical centers to increase sample size and representation, but this raises the issue of data heterogeneity. To this end, we propose a new cross-center 3D tumor segmentation method named unsupervised scale-aware and boundary-aware domain adaptive network (USBDAN), which includes a new 3D neural network that efficiently bridges an Anisotropic neural network and a Transformer (AsTr) for extracting multi-scale features from the CT images with anisotropic resolution, and a scale-aware and boundary-aware domain alignment (SaBaDA) module for adaptively aligning multi-scale features between two domains and enhancing tumor boundary drawing based on location-related information drawn from each sample across all domains. We evaluate the proposed method on an in-house CT image dataset collected from four medical centers. Our results demonstrate that the proposed method outperforms several state-of-the-art methods.
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Liu Y, Li H, Lin J, Li H, Lei H, Xia C, Xiao C, Lei B. Gated CNN-Transformer Network for Automatic Cardiovascular Diagnosis using 12-lead Electrocardiogram. Annu Int Conf IEEE Eng Med Biol Soc 2023; 2023:1-4. [PMID: 38082863 DOI: 10.1109/embc40787.2023.10341010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
12-lead electrocardiogram (ECG) is a widely used method in the diagnosis of cardiovascular disease (CVD). With the increase in the number of CVD patients, the study of accurate automatic diagnosis methods via ECG has become a research hotspot. The use of deep learning-based methods can reduce the influence of human subjectivity and improve the diagnosis accuracy. In this paper, we propose a 12-lead ECG automatic diagnosis method based on channel features and temporal features fusion. Specifically, we design a gated CNN-Transformer network, in which the CNN block is used to extract signal embeddings to reduce data complexity. The dual-branch transformer structure is used to effectively extract channel and temporal features in low-dimensional embeddings, respectively. Finally, the features from the two branches are fused by the gating unit to achieve automatic CVD diagnosis from 12-lead ECG. The proposed end-to-end approach has more competitive performance than other deep learning algorithms, which achieves an overall diagnostic accuracy of 85.3% in the 12-lead ECG dataset of CPSC-2018.
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5
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Affiliation(s)
- T Zhu
- From the Department of Digestive Disease, Weinan Central Hospital, Weinan, Shaanxi 714000, China
| | - H Lei
- Department of Anesthesiology, Weinan Central Hospital, Weinan, Shaanxi 714000, China
| | - Y-H Wang
- From the Department of Digestive Disease, Weinan Central Hospital, Weinan, Shaanxi 714000, China
| | - L-P Liu
- From the Department of Digestive Disease, Weinan Central Hospital, Weinan, Shaanxi 714000, China
| | - Y-L Lei
- From the Department of Digestive Disease, Weinan Central Hospital, Weinan, Shaanxi 714000, China
| | - N Wang
- From the Department of Digestive Disease, Weinan Central Hospital, Weinan, Shaanxi 714000, China
| | - Y-H Zheng
- Department of Hematology, Tangdu Hospital, Fourth Military Medical University, Clinical Medicine Research Center for Hematologic Disease of Shaanxi Province, Xi'an, Shaanxi 710038, China
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Xie H, Liu Y, Lei H, Song T, Yue G, Du Y, Wang T, Zhang G, Lei B. Adversarial learning-based multi-level dense-transmission knowledge distillation for AP-ROP detection. Med Image Anal 2023; 84:102725. [PMID: 36527770 DOI: 10.1016/j.media.2022.102725] [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: 11/21/2021] [Revised: 10/31/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022]
Abstract
The Aggressive Posterior Retinopathy of Prematurity (AP-ROP) is the major cause of blindness for premature infants. The automatic diagnosis method has become an important tool for detecting AP-ROP. However, most existing automatic diagnosis methods were with heavy complexity, which hinders the development of the detecting devices. Hence, a small network (student network) with a high imitation ability is exactly needed, which can mimic a large network (teacher network) with promising diagnostic performance. Also, if the student network is too small due to the increasing gap between teacher and student networks, the diagnostic performance will drop. To tackle the above issues, we propose a novel adversarial learning-based multi-level dense knowledge distillation method for detecting AP-ROP. Specifically, the pre-trained teacher network is utilized to train multiple intermediate-size networks (i.e., teacher-assistant networks) and one student network by dense transmission mode, where the knowledge from all upper-level networks is transmitted to the current lower-level network. To ensure that two adjacent networks can distill the abundant knowledge, the adversarial learning module is leveraged to enforce the lower-level network to generate the features that are similar to those of the upper-level network. Extensive experiments demonstrate that our proposed method can realize the effective knowledge distillation from the teacher to student networks. We achieve a promising knowledge distillation performance for our private dataset and a public dataset, which can provide a new insight for devising lightweight detecting systems of fundus diseases for practical use.
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Affiliation(s)
- Hai Xie
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
| | - Yaling Liu
- Shenzhen Eye Hospital, Jinan University, Shenzhen Eye Institute, Shenzhen, China
| | - Haijun Lei
- Guangdong Province Key Laboratory of Popular High-performance Computers, School of Computer and Software Engineering, Shenzhen University, Shenzhen, China
| | - Tiancheng Song
- Shenzhen Silan Zhichuang Technology Co., Ltd., Shenzhen, China
| | - Guanghui Yue
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
| | - Yueshanyi Du
- Shenzhen Eye Hospital, Jinan University, Shenzhen Eye Institute, Shenzhen, China
| | - Tianfu Wang
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
| | - Guoming Zhang
- Shenzhen Eye Hospital, Jinan University, Shenzhen Eye Institute, Shenzhen, China.
| | - Baiying Lei
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China.
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Zheng XC, Wu CL, Xiong J, Lei H. UV Photoinitiated Temperature-Sensitive Modification of Polypropylene Grafted with Poly(N-isopropylacrylamide). Polym Sci Ser B 2022. [DOI: 10.1134/s1560090422700415] [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: 12/12/2022]
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8
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Huang Z, Lei H, Chen G, Frangi AF, Xu Y, Elazab A, Qin J, Lei B. Parkinson's Disease Classification and Clinical Score Regression via United Embedding and Sparse Learning From Longitudinal Data. IEEE Trans Neural Netw Learn Syst 2022; 33:3357-3371. [PMID: 33534713 DOI: 10.1109/tnnls.2021.3052652] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Parkinson's disease (PD) is known as an irreversible neurodegenerative disease that mainly affects the patient's motor system. Early classification and regression of PD are essential to slow down this degenerative process from its onset. In this article, a novel adaptive unsupervised feature selection approach is proposed by exploiting manifold learning from longitudinal multimodal data. Classification and clinical score prediction are performed jointly to facilitate early PD diagnosis. Specifically, the proposed approach performs united embedding and sparse regression, which can determine the similarity matrices and discriminative features adaptively. Meanwhile, we constrain the similarity matrix among subjects and exploit the l2,p norm to conduct sparse adaptive control for obtaining the intrinsic information of the multimodal data structure. An effective iterative optimization algorithm is proposed to solve this problem. We perform abundant experiments on the Parkinson's Progression Markers Initiative (PPMI) data set to verify the validity of the proposed approach. The results show that our approach boosts the performance on the classification and clinical score regression of longitudinal data and surpasses the state-of-the-art approaches.
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Lei H, Zhang Y, Li H, Huang Z, Liu CH, Zhou F, Tan EL, Xiao X, Lei Y, Hu H, Huang Y, Lei B. Gene-related Parkinson's disease diagnosis via feature-based multi-branch octave convolution network. Comput Biol Med 2022; 148:105859. [DOI: 10.1016/j.compbiomed.2022.105859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 06/14/2022] [Accepted: 06/21/2022] [Indexed: 11/25/2022]
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10
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Zhou J, Chai YH, Zhang XM, Lei H. [Intestinal microbe Prevotella in pulmonary tuberculosis research]. Zhonghua Jie He He Hu Xi Za Zhi 2022; 45:414-418. [PMID: 35381640 DOI: 10.3760/cma.j.cn112147-20210719-00507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Tuberculosis is a major global infectious disease that seriously endangers human health. Studies have shown that there will be an imbalance of intestinal microecology after infection with Mycobacterium tuberculosis. And vise versa the imbalance of intestinal flora will also increase the susceptibility to Mycobacterium tuberculosis. Prevotella is a newly discovered intestinal microorganism closely related to inflammatory diseases, and its abundance changes significantly in patients with tuberculosis. Therefore, this paper reviews the correlation between intestinal microorganism Prevotella and pulmonary tuberculosis, in order to provide new ideas for the diagnosis and treatment of pulmonary tuberculosis.
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Affiliation(s)
- J Zhou
- Graduate School, Hebei North University, Zhangjiakou 075000, China
| | - Y H Chai
- Laboratory Medicine, Eighth Medical Center of Chinese People's Liberation Army General Hospital, Beijing 100091, China
| | - X M Zhang
- Graduate School, Hebei North University, Zhangjiakou 075000, China
| | - H Lei
- Laboratory Medicine, Eighth Medical Center of Chinese People's Liberation Army General Hospital, Beijing 100091, China
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Chen T, Zhang Z, Lei H, Fen Z, Yuan Y, Jin X, Zhou H, Liu J, Wang W, Guo Q, Li L, Shao J. The relationship between serum 25-hydroxyvitamin-D level and sweat function in patients with type 2 diabetes mellitus. J Endocrinol Invest 2022; 45:361-368. [PMID: 34324162 DOI: 10.1007/s40618-021-01651-z] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 07/24/2021] [Indexed: 10/20/2022]
Abstract
AIMS The objective of this study is to explore the relationship between serum 25-hydroxyvitamin-D(25-(OH)2D3) level and sweat function in patients with type 2 diabetes mellitus (T2DM). METHODS A cross-sectional study of 1021 patients with T2DM who underwent 25-(OH)2D3 level detections and sweat function tests was carried out. These individuals were divided into deficient groups (n = 154 cases), insufficient groups (n = 593 cases) and sufficient groups (n = 274 cases). Spearman correlation analysis and multivariate stepwise linear regression analysis were implemented to determine the association of 25-(OH)2D3 level and sweat function. RESULTS The total presence of sweating dysfunction was 38.59%. Patients with a lower level of serum 25-(OH)2D3 had more severe sweat secretion impairment (P < 0.05). As the decrease of serum 25-(OH)2D3 level, the presence of sweating dysfunction increased (P < 0.05). 25-(OH)2D3 level was positively correlated with sweat function parameters, age and duration of T2DM were negatively correlated with sweat function parameter (P < 0.05). Multivariate stepwise linear regression analysis explored a significant association between serum 25-(OH)2D3 level with sweat function (P < 0.05). CONCLUSIONS Serum 25-(OH)2D3 level was positively correlated with sweat function in patients with T2DM.
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Affiliation(s)
- T Chen
- Department of Endocrinology, Jinling Hospital, Nanjing Medical University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu, China
| | - Z Zhang
- The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, China
| | - H Lei
- Department of Endocrinology, Jinling Hospital, Southern Medical University, Nanjing, China
| | - Z Fen
- Department of Endocrinology, Jinling Hospital, Southern Medical University, Nanjing, China
| | - Y Yuan
- Department of Endocrinology, Jinling Hospital, Nanjing Medical University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu, China
| | - X Jin
- Department of Endocrinology, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, China
| | - H Zhou
- Department of Endocrinology, Jinling Hospital, Southern Medical University, Nanjing, China
| | - J Liu
- Department of Endocrinology, Jinling Hospital, Southern Medical University, Nanjing, China
| | - W Wang
- Department of Endocrinology, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, China
| | - Q Guo
- Department of Endocrinology, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, China
| | - L Li
- Department of Endocrinology, Chinese Navy No.971.Hospital, 22Minjiang Road, Qingdao, 266000, Shandong, China.
| | - J Shao
- Department of Endocrinology, Jinling Hospital, Nanjing Medical University, 305 East Zhongshan Road, Nanjing, 210002, Jiangsu, China.
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Luo Y, Lei H, Wang R, Zhao H, Zhang G, Song C. A Novel In Vivo Functional Screening Method for the Candidate Polyphosphate Accumulating Organisms Isolation. APPL BIOCHEM MICRO+ 2021. [DOI: 10.1134/s0003683821100045] [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: 11/23/2022]
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13
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Huang Z, Lei H, Chen G, Li H, Li C, Gao W, Chen Y, Wang Y, Xu H, Ma G, Lei B. Multi-center sparse learning and decision fusion for automatic COVID-19 diagnosis. Appl Soft Comput 2021; 115:108088. [PMID: 34840541 PMCID: PMC8611958 DOI: 10.1016/j.asoc.2021.108088] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 10/18/2021] [Accepted: 11/07/2021] [Indexed: 12/30/2022]
Abstract
The coronavirus disease 2019 (COVID-19) pandemic caused by the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has led to a sharp increase in hospitalized patients with multi-organ disease pneumonia. Early and automatic diagnosis of COVID-19 is essential to slow down the spread of this epidemic and reduce the mortality of patients infected with SARS-CoV-2. In this paper, we propose a joint multi-center sparse learning (MCSL) and decision fusion scheme exploiting chest CT images for automatic COVID-19 diagnosis. Specifically, considering the inconsistency of data in multiple centers, we first convert CT images into histogram of oriented gradient (HOG) images to reduce the structural differences between multi-center data and enhance the generalization performance. We then exploit a 3-dimensional convolutional neural network (3D-CNN) model to learn the useful information between and within 3D HOG image slices and extract multi-center features. Furthermore, we employ the proposed MCSL method that learns the intrinsic structure between multiple centers and within each center, which selects discriminative features to jointly train multi-center classifiers. Finally, we fuse these decisions made by these classifiers. Extensive experiments are performed on chest CT images from five centers to validate the effectiveness of the proposed method. The results demonstrate that the proposed method can improve COVID-19 diagnosis performance and outperform the state-of-the-art methods.
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Affiliation(s)
- Zhongwei Huang
- Key Laboratory of Service Computing and Applications, Guangdong Province Key Laboratory of Popular High Performance Computers, Guangdong Province Engineering Center of China-made High Performance Data Computing System, Guangdong Laboratory of Artificial-Intelligence and Cyber-Economics, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China
| | - Haijun Lei
- Key Laboratory of Service Computing and Applications, Guangdong Province Key Laboratory of Popular High Performance Computers, Guangdong Province Engineering Center of China-made High Performance Data Computing System, Guangdong Laboratory of Artificial-Intelligence and Cyber-Economics, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China
| | - Guoliang Chen
- Key Laboratory of Service Computing and Applications, Guangdong Province Key Laboratory of Popular High Performance Computers, Guangdong Province Engineering Center of China-made High Performance Data Computing System, Guangdong Laboratory of Artificial-Intelligence and Cyber-Economics, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China
| | - Haimei Li
- Department of Radiology, Fu Xing Hospital, Capital Medical University, Beijing, China
| | - Chuandong Li
- Department of Radiology, China-Japan Friendship Hospital, Beijing, China
| | - Wenwen Gao
- Department of Radiology, China-Japan Friendship Hospital, Beijing, China
| | - Yue Chen
- Department of Radiology, China-Japan Friendship Hospital, Beijing, China
| | - Yaofa Wang
- Minfound Medical Systems Co., Ltd., Hangzhou, China
| | - Haibo Xu
- Department of Radiology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Guolin Ma
- Department of Radiology, China-Japan Friendship Hospital, Beijing, China
| | - Baiying Lei
- National- Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
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Chen Z, Lei H, Huang Z, Lei B. Latent Space Learning and Feature Learning using Multi-template for Multi-classification of Alzheimer's Disease. Annu Int Conf IEEE Eng Med Biol Soc 2021; 2021:1844-1847. [PMID: 34891646 DOI: 10.1109/embc46164.2021.9630795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Alzheimer's disease (AD) is a common brain disease in the elderly that leads to thinking, memory, and behavior disorders. As the population ages, the proportion of AD patients is also increasing. Accordingly, computer-aided diagnosis of AD attracts more and more attention recently. In this paper, we propose a novel model combining latent space learning and feature learning using features extracted from multiple templates for AD multi-classification. Specifically, latent space learning is employed to obtain the inter-relationship between multiple templates, and feature learning is performed to explore the intrinsic relation in feature space. Finally, the most discriminative features are selected to boost the multi-classification performance. Our proposed model uses the data from the Alzheimer's disease neuroimaging initiative dataset. Furthermore, a series of comparative experiments indicate that our proposed model is quite competitive.
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Guo M, Sun C, Yang W, Chen L, Lei H, Zhang Q. Corrigendum to ‘Sulphur-induced Electrochemical Synthesis of Manganese Nanoflakes from Choline Chloride/Ethylene Glycol-based Deep Eutectic Solvent’ [Electrochimica Acta, 2020, 341:136017.]. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138832] [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: 10/21/2022]
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16
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Chen J, Wang W, Guo Z, Huang S, Lei H, Zang P, Lu B, Shao J, Gu P. Associations between gut microbiota and thyroidal function status in Chinese patients with Graves' disease. J Endocrinol Invest 2021; 44:1913-1926. [PMID: 33481211 DOI: 10.1007/s40618-021-01507-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [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: 10/31/2020] [Accepted: 01/09/2021] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The imbalance of gut microbiota has been linked to manifold endocrine diseases, but the association with Graves' disease (GD) is still unclear. The purpose of this study was to investigate the correlation between human gut microbiota and clinical characteristics and thyroidal functional status of GD. METHODS 14 healthy volunteers (CG) and 15 patients with primary GD (HG) were recruited as subjects. 16SrDNA high-throughput sequencing was performed on IlluminaMiSeq platform to analyze the characteristics of gut microbiota in patients with GD. Among them, the thyroid function of 13 patients basically recovered after treatment with anti-thyroid drugs (oral administration of Methimazole for 3-5 months). The fecal samples of patients after treatment (TG) were sequenced again, to further explore and investigate the potential relationship between dysbacteriosis and GD. RESULTS In terms of alpha diversity index, the observed OTUs, Simpson and Shannon indices of gut microbiota in patients with GD were significantly lower than those in healthy volunteers (P < 0.05).The difference of bacteria species was mainly reflected in the genus level, in which the relative abundance of Lactobacillus, Veillonella and Streptococcus increased significantly in GD. After the improvement of thyroid function, a significant reduction at the genus level were Blautia, Corynebacter, Ruminococcus and Streptococcus, while Phascolarctobacterium increased significantly (P < 0.05). According to Spearman correlation analysis, the correlation between the level of thyrotropin receptor antibody (TRAb) and the relative abundance of Lactobacillus and Ruminococcus was positive, while Synergistetes and Phascolarctobacterium showed a negative correlation with TRAb. Besides, there were highly significant negative correlation between Synergistetes and clinical variables of TRAb, TPOAb and TGAb (P < 0.05, R < - 0.6). CONCLUSIONS This study revealed that functional status and TRAb level in GD were associated with composition and biological function in the gut microbiota, with Synergistetes and Phascolarctobacterium protecting the thyroid probably, while Ruminococcus and Lactobacillus may be novel biomarkers of GD.
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Affiliation(s)
- J Chen
- Department of Endocrinology, Jinling Hospital, Southeast Univ, Sch Med, Nanjing, China
| | - W Wang
- Department of Endocrinology, Jinling Hospital, Nanjing Univ, Sch Med, Nanjing, China
| | - Z Guo
- Department of Endocrinology, Jinling Hospital, Nanjing Med Univ, Nanjing, China
| | - S Huang
- Department of Endocrinology, Jinling Hospital, Nanjing Univ, Sch Med, Nanjing, China
| | - H Lei
- Department of Endocrinology, Jinling Hospital, Southern Medical University, Nanjing, China
| | - P Zang
- Department of Endocrinology, Jinling Hospital, Nanjing Univ, Sch Med, Nanjing, China
| | - B Lu
- Department of Endocrinology, Jinling Hospital, Nanjing Univ, Sch Med, Nanjing, China
| | - J Shao
- Department of Endocrinology, Jinling Hospital, Nanjing Univ, Sch Med, Nanjing, China.
| | - P Gu
- Department of Endocrinology, Jinling Hospital, Nanjing Univ, Sch Med, Nanjing, China.
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17
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Lei H, Liu W, Xie H, Zhao B, Yue G, Lei B. Unsupervised Domain Adaptation Based Image Synthesis and Feature Alignment for Joint Optic Disc and Cup Segmentation. IEEE J Biomed Health Inform 2021; 26:90-102. [PMID: 34061755 DOI: 10.1109/jbhi.2021.3085770] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Due to the discrepancy of different devices for fundus image collection, a well-trained neural network is usually unsuitable for another new dataset. To solve this problem, the unsupervised domain adaptation strategy attracts a lot of attentions. In this paper, we propose an unsupervised domain adaptation method based image synthesis and feature alignment (ISFA) method to segment optic disc and cup on the fundus image. The GAN-based image synthesis (IS) mechanism along with the boundary information of optic disc and cup is utilized to generate target-like query images, which serves as the intermediate latent space between source domain and target domain images to alleviate the domain shift problem. Specifically, we use content and style feature alignment (CSFA) to ensure the feature consistency among source domain images, target-like query images and target domain images. The adversarial learning is used to extract domain invariant features for output-level feature alignment (OLFA). To enhance the representation ability of domain-invariant boundary structure information, we introduce the edge attention module (EAM) for low-level feature maps. Eventually, we train our proposed method on the training set of the REFUGE challenge dataset and test it on Drishti-GS and RIM-ONE_r3 datasets. On the Drishti-GS dataset, our method achieves about 3% improvement of Dice on optic cup segmentation over the next best method. We comprehensively discuss the robustness of our method for small dataset domain adaptation. The experimental results also demonstrate the effectiveness of our method. Our code is available at https://github.com/thinkobj/ISFA.
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18
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Wang N, Fang H, Lei H, Ye D. Dual feedback based bipolar current source with high stability for driving voice coil motors in wide temperature ranges. Rev Sci Instrum 2021; 92:054708. [PMID: 34243275 DOI: 10.1063/5.0039680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 04/26/2021] [Indexed: 06/13/2023]
Abstract
Bipolar current sources with a stability better than 0.1% in the temperature range of -30 to +70 °C are demanded for driving voice coil motors applied in a new ultra-quiet satellite platform, but almost none of the existing designs satisfy the harsh requirements. This paper presents a possible solution, which is essentially a floating-load, bipolar current source circuit with a dual feedback path. The key circuit is a composite amplifier (co-amp) composed of a high precision amplifier for error correction and a high power amplifier for load driving. The first feedback path comprises a specially designed four-wire current-sense resistor for current-to-voltage conversion and a discrete instrumentation amplifier for amplifying the converted voltage and closing the loop. The second feedback path is a proposed compensation network for loop stability. Error budgets for evaluating current stability and choosing key components of the circuit are comprehensively studied based on a derived rigorous current equation. Loop-stability problems attributable to the inductive load and the high open-loop gain of the co-amp are analyzed, and the proposed dual feedback compensation method is verified by theory, simulation, and measurement. All these contributions are demonstrated by three implemented prototypes with an output of up to ±2 A. The measured results agree well with theoretical predictions. The best and the worst stability performances of the three prototypes at +2 and -2 A are, respectively, 394 and 986 ppm in the temperature range of -30 to +70 °C, which are close to the theoretical value of 776 ppm.
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Affiliation(s)
- Nong Wang
- Beijing Institute of Control Engineering, Beijing 100190, China
| | - Huachao Fang
- Beijing Institute of Control Engineering, Beijing 100190, China
| | - Haijun Lei
- Beijing Institute of Control Engineering, Beijing 100190, China
| | - Dongdong Ye
- Beijing Institute of Control Engineering, Beijing 100190, China
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Xie H, Zeng X, Lei H, Du J, Wang J, Zhang G, Cao J, Wang T, Lei B. Cross-attention multi-branch network for fundus diseases classification using SLO images. Med Image Anal 2021; 71:102031. [PMID: 33798993 DOI: 10.1016/j.media.2021.102031] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 01/24/2021] [Accepted: 03/03/2021] [Indexed: 12/23/2022]
Abstract
Fundus diseases classification is vital for the health of human beings. However, most of existing methods detect diseases by means of single angle fundus images, which lead to the lack of pathological information. To address this limitation, this paper proposes a novel deep learning method to complete different fundus diseases classification tasks using ultra-wide field scanning laser ophthalmoscopy (SLO) images, which have an ultra-wide field view of 180-200˚. The proposed deep model consists of multi-branch network, atrous spatial pyramid pooling module (ASPP), cross-attention and depth-wise attention module. Specifically, the multi-branch network employs the ResNet-34 model as the backbone to extract feature information, where the ResNet-34 model with two-branch is followed by the ASPP module to extract multi-scale spatial contextual features by setting different dilated rates. The depth-wise attention module can provide the global attention map from the multi-branch network, which enables the network to focus on the salient targets of interest. The cross-attention module adopts the cross-fusion mode to fuse the channel and spatial attention maps from the ResNet-34 model with two-branch, which can enhance the representation ability of the disease-specific features. The extensive experiments on our collected SLO images and two publicly available datasets demonstrate that the proposed method can outperform the state-of-the-art methods and achieve quite promising classification performance of the fundus diseases.
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Affiliation(s)
- Hai Xie
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
| | - Xianlu Zeng
- Shenzhen Eye Hospital, Shenzhen Key Ophthalmic Laboratory, Health Science Center, Shenzhen University, The Second Affiliated Hospital of Jinan University, Shenzhen, China
| | - Haijun Lei
- Guangdong Province Key Laboratory of Popular High-performance Computers, School of Computer and Software Engineering, Shenzhen University, Shenzhen, China
| | - Jie Du
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
| | - Jiantao Wang
- Shenzhen Eye Hospital, Shenzhen Key Ophthalmic Laboratory, Health Science Center, Shenzhen University, The Second Affiliated Hospital of Jinan University, Shenzhen, China
| | - Guoming Zhang
- Shenzhen Eye Hospital, Shenzhen Key Ophthalmic Laboratory, Health Science Center, Shenzhen University, The Second Affiliated Hospital of Jinan University, Shenzhen, China.
| | - Jiuwen Cao
- Key Lab for IOT and Information Fusion Technology of Zhejiang, Artificial Intelligence Institute, Hangzhou Dianzi University, Hangzhou, China
| | - Tianfu Wang
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
| | - Baiying Lei
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China.
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Lei H, Liu S, Elazab A, Gong X, Lei B. Attention-Guided Multi-Branch Convolutional Neural Network for Mitosis Detection From Histopathological Images. IEEE J Biomed Health Inform 2021; 25:358-370. [PMID: 32991296 DOI: 10.1109/jbhi.2020.3027566] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Mitotic count is an important indicator for assessing the invasiveness of breast cancers. Currently, the number of mitoses is manually counted by pathologists, which is both tedious and time-consuming. To address this situation, we propose a fast and accurate method to automatically detect mitosis from the histopathological images. The proposed method can automatically identify mitotic candidates from histological sections for mitosis screening. Specifically, our method exploits deep convolutional neural networks to extract high-level features of mitosis to detect mitotic candidates. Then, we use spatial attention modules to re-encode mitotic features, which allows the model to learn more efficient features. Finally, we use multi-branch classification subnets to screen the mitosis. Compared to existing related methods in literature, our method obtains the best detection results on the dataset of the International Pattern Recognition Conference (ICPR) 2012 Mitosis Detection Competition. Code has been made available at: https://github.com/liushaomin/MitosisDetection.
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21
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Xie H, Lei H, Zeng X, He Y, Chen G, Elazab A, Yue G, Wang J, Zhang G, Lei B. AMD-GAN: Attention encoder and multi-branch structure based generative adversarial networks for fundus disease detection from scanning laser ophthalmoscopy images. Neural Netw 2020; 132:477-490. [PMID: 33039786 DOI: 10.1016/j.neunet.2020.09.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 08/03/2020] [Accepted: 09/06/2020] [Indexed: 12/23/2022]
Abstract
The scanning laser ophthalmoscopy (SLO) has become an important tool for the determination of peripheral retinal pathology, in recent years. However, the collected SLO images are easily interfered by the eyelash and frame of the devices, which heavily affect the key feature extraction of the images. To address this, we propose a generative adversarial network called AMD-GAN based on the attention encoder (AE) and multi-branch (MB) structure for fundus disease detection from SLO images. Specifically, the designed generator consists of two parts: the AE and generation flow network, where the real SLO images are encoded by the AE module to extract features and the generation flow network to handle the random Gaussian noise by a series of residual block with up-sampling (RU) operations to generate fake images with the same size as the real ones, where the AE is also used to mine features for generator. For discriminator, a ResNet network using MB is devised by copying the stage 3 and stage 4 structures of the ResNet-34 model to extract deep features. Furthermore, the depth-wise asymmetric dilated convolution is leveraged to extract local high-level contextual features and accelerate the training process. Besides, the last layer of discriminator is modified to build the classifier to detect the diseased and normal SLO images. In addition, the prior knowledge of experts is utilized to improve the detection results. Experimental results on the two local SLO datasets demonstrate that our proposed method is promising in detecting the diseased and normal SLO images with the experts labeling.
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Affiliation(s)
- Hai Xie
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
| | - Haijun Lei
- School of Computer and Software Engineering, Shenzhen University, Guangdong Province Key Laboratory of Popular High-performance Computers, Shenzhen, China
| | - Xianlu Zeng
- Shenzhen Eye Hospital; Shenzhen Key Ophthalmic Laboratory, Health Science Center, Shenzhen University, The Second Affiliated Hospital of Jinan University, Shenzhen, China
| | - Yejun He
- College of Electronics and Information Engineering, Shenzhen University, China; Guangdong Engineering Research Center of Base Station Antennas and Propagation, Shenzhen Key Lab of Antennas and Propagation, Shenzhen, China
| | - Guozhen Chen
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
| | - Ahmed Elazab
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China; Computer Science Department, Misr Higher Institute for Commerce and Computers, Mansoura, Egypt
| | - Guanghui Yue
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
| | - Jiantao Wang
- Shenzhen Eye Hospital; Shenzhen Key Ophthalmic Laboratory, Health Science Center, Shenzhen University, The Second Affiliated Hospital of Jinan University, Shenzhen, China
| | - Guoming Zhang
- Shenzhen Eye Hospital; Shenzhen Key Ophthalmic Laboratory, Health Science Center, Shenzhen University, The Second Affiliated Hospital of Jinan University, Shenzhen, China.
| | - Baiying Lei
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China.
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22
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Liu W, Bhavsar R, Mamikonyan E, Yang FN, Lei H, Weintraub D, Detre JA, Rao H. 0075 Neural Correlates of Cognitive Fatigue in Parkinson Disease. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Parkinson’s disease (PD) is a common neurodegenerative disease affecting millions of people world-wide. Fatigue is a prevalent and debilitating non-motor symptom in PD. However, the neural correlates underlying cognitive fatigue are poorly understood. Our previous studies suggested that continuous performance of a simple but mentally demanding psychomotor vigilance task (PVT) induced cognitive fatigue, operationalized as subjective exhaustion and time-on-task performance decline. Here we used arterial spin labeling (ASL) perfusion fMRI to investigate regional cerebral blood flow (CBF) changes in PD patients during cognitive fatigue induced by continuous performance of 20-min PVT.
Methods
Twenty-one PD patients completed a 20-min PVT during the ASL scan and two additional 4-min resting-state ASL scans before and after PVT. Reaction times (RTs) and regional CBF changes throughout the PVT as well as during pre- and post-task resting baselines were measured. Cognitive fatigue was analyzed by dividing the entire PVT performance into five quintiles in addition to the immediate measurement of self-rated fatigue before and after PVT.
Results
PD patients demonstrated significantly increased self-reported fatigue ratings after the task (p < 0.05) and progressively slower RTs across quintiles (p < 0.05). Perfusion data showed that the PVT activates the right middle frontal cortex, right inferior parietal lobe, right insula, bilateral occipital cortex, and right cerebellum (FDR corrected). Moreover, the bilateral middle frontal gyri were less active during the post-task rest compared to the pre-task rest.
Conclusion
These results demonstrated that cognitive fatigue has an ongoing effect on brain activity after a period of continuous mental effort and supported the critical role of prefrontal cortex in mediating cognitive fatigue in PD. The findings also suggest the utility of continuous PVT as an appropriate paradigm to induce and examine cognitive fatigue in PD.
Support
Supported in part by Parkinson’s Foundation Translational Research Grant and NIH grants R01-MH107571, R21-AG051981, and P30-NS045839.
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Affiliation(s)
- W Liu
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, PHILADELPHIA, PA
| | - R Bhavsar
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, PHILADELPHIA, PA
| | - E Mamikonyan
- Department of Psychiatry, University of Pennsylvania, PHILADELPHIA, PA
| | - F N Yang
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, PHILADELPHIA, PA
| | - H Lei
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, PHILADELPHIA, PA
| | - D Weintraub
- Department of Psychiatry, University of Pennsylvania, PHILADELPHIA, PA
| | - J A Detre
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, PHILADELPHIA, PA
| | - H Rao
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, PHILADELPHIA, PA
- Department of Psychiatry, University of Pennsylvania, Philadelphia, PA
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Quan P, Lei H, Wang J, Liu W, Zhang X, Dinges D, Rao H. 0294 Baseline Response Speed Predicts Locus Coeruleus Integrity Change After Sleep Deprivation. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Locus coeruleus (LC) is the major source of norepinephrine (NE) in the brain, which plays a key role in maintaining arousal and alertness. Sleep loss significantly impairs arousal and alertness. However, it is unknown whether sleep loss disrupts LC integrity, which can be measured non-invasively by diffusion tensor imaging (DTI). In the current study, we used DTI to examine the effects of one night of acute total sleep deprivation (TSD) on fractional anisotropy (FA), an index reflecting fiber density, axonal diameter and myelination.
Methods
We analyzed DTI and psychomotor vigilance test (PVT) data from N=54 health adults (23 females, age range 21–50 years) from a well controlled in-laboratory sleep deprivation study. Participants were randomized to either a TSD condition (n=40) without sleep on night 2, or a control condition (n=14) with no sleep loss. Standard DTI scans were conducted on the morning of day 2 and day 3 between 0700h-1000h. The PVT reciprocal response time (RRT) was used to measure individual’s response speed at baseline without sleep loss. LC regions-of-interest (ROI) were defined by standard templates from Keren et al. (2009). Imaging data were analyzed using FSL toolbox.
Results
For the whole TSD group, no differences were found in the LC FA values before and after sleep deprivation (p > .2). However, when dividing the TSD group to a slow group and a fast group based on their baseline PVT response speed, significantly increased LC FA were found in the slow group (p = .007) but not in the fast group (p > .4). The PVT RRT negatively correlated with LC FA value changes after TSD (r = -.44, p = .004). No correlations were found between the PVT RRT and LC FA changes in the control group.
Conclusion
Our results showed that baseline vigilance response speed correlated with LC integrity change after sleep deprivation, with slower response exhibiting greater changes in LC integrity. These findings support the key role of LC-NE system in the regulation of alertness and arousal.
Support
Supported in part by NIH grants R01-HL102119, R01-MH107571, R21-AG051981. CTRC UL1RR024134, and P30-NS045839.
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Affiliation(s)
- P Quan
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadlephia, PA
| | - H Lei
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadlephia, PA
| | - J Wang
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadlephia, PA
| | - W Liu
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadlephia, PA
| | - X Zhang
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadlephia, PA
| | - D Dinges
- Division of Sleep and Chronobiology, Department of Psychiatry, University of Pennsylvania, Philadlephia, PA
| | - H Rao
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadlephia, PA
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Lei H, Quan P, Liu W, Zhang X, Chai Y, Yang F, Dinges D, Rao H. 0060 Morning Locus Coeruleus Activation During the PVT Predicts Later-Day Sleepiness. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
The locus coeruleus (LC) plays a key role in the regulation of arousal and autonomic function. Homeostatic sleep pressure refers to the drive for sleep that increases as a saturating exponential when we stay awake and decreases exponentially when we sleep. The current study used arterial spin labeling (ASL) functional magnetic resonance imaging (fMRI) to investigate the relationship between homeostatic sleep pressure (sleepiness) and LC activity during the psychomotor vigilance test (PVT).
Methods
We analyzed sleepiness and ASL imaging data from N=70 health adults (40 males, age range 21–50 years) who participated in a controlled in-laboratory sleep study. All participants were scanned at rest and during the PVT on the morning between 0700h-1000h after 9 hour time-in-bed (TIB) baseline sleep. LC regions-of-interest (ROI) were defined by standard templates from Keren et al. (2009). Sleepiness was assessed by the Karolinska Sleepiness Scale (KSS) every two hours from 10:30 am to 10:30 pm.
Results
Sleepiness scores gradually increased over wakefulness time and reached its peak in the evening at about 10:20pm. PVT-induced CBF changes did not correlate with sleepiness scores on the morning (p > 0.05), but showed significant negative correlations with sleepiness scores on later day when sleep pressure became higher, especially during the night-time (r = -0.41, p < 0.001). Specifically, LC CBF showed significant increases during the PVT scan as compared to the resting scan (p = 0.04) in individuals with less nigh-time sleepiness (KSS < 4), but no differences (p > 0.1) in individuals with greater nigh-time sleepiness (KSS ≥ 5). After controlling for age, gender, and total sleep time, PVT-induced regional CBF difference in the LC still negatively predicted sleepiness (β = -0.325, p = 0.005).
Conclusion
Our findings showed that individuals with greater LC CBF increases during the PVT were less sleepy during the night, supporting the key role of LC activity in promoting wakefulness and maintaining sleep homeostasis. PVT-induced LC activation may provide a non-invasive bio-marker of homeostatic sleep pressure in healthy adults.
Support
Supported in part by NIH grants R01-HL102119, R01-MH107571, R21-AG051981. CTRC UL1RR024134, and P30-NS045839.
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Affiliation(s)
- H Lei
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadelphia, PA
| | - P Quan
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadelphia, PA
| | - W Liu
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadelphia, PA
| | - X Zhang
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadelphia, PA
| | - Y Chai
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadelphia, PA
| | - F Yang
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadelphia, PA
| | - D Dinges
- Division of Sleep and Chronobiology, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA
| | - H Rao
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadelphia, PA
- Division of Sleep and Chronobiology, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA
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Lei H, Moses L, Brault J, Meis R, Dahl G, Malech H, Deravin S, Stroncek D, Highfill S. Development of a gmp manufacturing process for nadph oxidase correction in mRNA transfected granulocytes and monocytes for patients with chronic granulomatous disease. Cytotherapy 2020. [DOI: 10.1016/j.jcyt.2020.03.297] [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: 11/26/2022]
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Abstract
Breast cancer grading is important for patient prognosis, and the mitosis count is one of the most important indicators for breast cancer grading. Traditional methods use handcraft features and deep learning based methods to detect mitosis in a classified model. These methods are time-consuming and difficult for practical clinical practice application. For this reason, this paper proposes an improved object detection method for automatic mitosis detection from histological images. First, we use a convolutional neural network (CNN) to automatically extract mitosis features. Then, we use the region proposed network (RPN) to locate a set of class-agnostic mitosis proposals. Finally, we use the improved R-CNN subnet to screen for mitosis from these proposals. Our approach achieved the best results in the ICPR2012 mitosis detection competition test dataset. Additionally, our proposed method is fast enough to be potentially used in clinical and health centers.
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28
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Chen S, Lei H, Luo Y, Jiang S, Zhang M, Lv H, Cai Z, Huang X. Micro‐
CT
analysis of chronic apical periodontitis induced by several specific pathogens. Int Endod J 2019; 52:1028-1039. [PMID: 30734930 DOI: 10.1111/iej.13095] [Citation(s) in RCA: 15] [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] [Received: 08/01/2018] [Accepted: 02/05/2019] [Indexed: 12/11/2022]
Affiliation(s)
- S. Chen
- School and Hospital of Stomatology Fujian Medical University Fuzhou China
- Key Laboratory of Stomatology Fujian Province University Fuzhou China
| | - H. Lei
- School and Hospital of Stomatology Fujian Medical University Fuzhou China
- Fujian Biological Materials Engineering and Technology Center of Stomatology Fuzhou China
| | - Y. Luo
- School and Hospital of Stomatology Fujian Medical University Fuzhou China
- Fujian Biological Materials Engineering and Technology Center of Stomatology Fuzhou China
| | - S. Jiang
- School and Hospital of Stomatology Fujian Medical University Fuzhou China
- Key Laboratory of Stomatology Fujian Province University Fuzhou China
| | - M. Zhang
- School and Hospital of Stomatology Fujian Medical University Fuzhou China
| | - H. Lv
- School and Hospital of Stomatology Fujian Medical University Fuzhou China
- Fujian Biological Materials Engineering and Technology Center of Stomatology Fuzhou China
| | - Z. Cai
- Department of Stomatology Fujian Medical University Union Hospital Fuzhou China
| | - X. Huang
- School and Hospital of Stomatology Fujian Medical University Fuzhou China
- Key Laboratory of Stomatology Fujian Province University Fuzhou China
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Wan Y, Liu B, Lei H, Zhang B, Wang Y, Huang H, Chen S, Feng Y, Zhu L, Gu Y, Zhang Q, Ma H, Zheng SY. Nanoscale extracellular vesicle-derived DNA is superior to circulating cell-free DNA for mutation detection in early-stage non-small-cell lung cancer. Ann Oncol 2018; 29:2379-2383. [PMID: 30339193 PMCID: PMC6311950 DOI: 10.1093/annonc/mdy458] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Background The comparison between relatively intact nanoscale extracellular vesicle-derived DNA (nEV-DNA) and fragmented circulating cell-free DNA (cfDNA) in mutation detection among patients with non-small-cell lung cancer (NSCLC) has not been carried out yet, and thus deserves investigation. Patients and methods Both nEV-DNA and cfDNA was obtained from 377 NSCLC patients with known EGFR mutation status and 69 controls. The respective EGFRE19del/T790M/L858R mutation status was interrogated with amplification-refractory-mutation-system-based PCR assays (ARMS-PCR). Results Neither nEV-DNA nor cfDNA levels show a strong correlation with tumor volumes. There is no correlation between cfDNA and nEV-DNA levels either. The detection sensitivity of nEV-DNA and cfDNA using ARMS-PCR in early-stage NSCLC was 25.7% and 14.2%, respectively, with 96.6% and 91.7% specificity, respectively. In late-stage NSCLC, both nEV-DNA and cfDNA show ∼80% sensitivity and over 95% specificity. Conclusions nEV-DNA is superior to cfDNA for mutation detection in early-stage NSCLC using ARMS-PCR. However, the advantages vanish in late-stage NSCLC.
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Affiliation(s)
- Y Wan
- Department of Biomedical Engineering, Micro and Nano Integrated Biosystem (MINIBio) Laboratory, USA; Penn State Material Research Institute, The Pennsylvania State University, University Park, USA
| | - B Liu
- Department of Pathology, Suzhou Municipal Hospital, Affiliate Hospital of Nanjing Medical University, Suzhou, Jiangsu, China
| | - H Lei
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China; PerMed Biomedicine Institute, Shanghai, China
| | - B Zhang
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Y Wang
- PerMed Biomedicine Institute, Shanghai, China
| | - H Huang
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - S Chen
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Y Feng
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - L Zhu
- PerMed Biomedicine Institute, Shanghai, China
| | - Y Gu
- PerMed Biomedicine Institute, Shanghai, China
| | - Q Zhang
- PerMed Biomedicine Institute, Shanghai, China
| | - H Ma
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.
| | - S-Y Zheng
- Department of Biomedical Engineering, Micro and Nano Integrated Biosystem (MINIBio) Laboratory, USA; Penn State Material Research Institute, The Pennsylvania State University, University Park, USA; Penn State Cancer Institute, University Park, USA; Department of Electrical Engineering, The Pennsylvania State University, University Park, USA.
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Kou L, Jin L, Lei H, Hu C, Li H, Hu X, Hu X. Real-time parallel 3D multiple particle tracking with single molecule centrifugal force microscopy. J Microsc 2018; 273:178-188. [PMID: 30489640 DOI: 10.1111/jmi.12773] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 11/16/2018] [Accepted: 11/20/2018] [Indexed: 12/20/2022]
Abstract
Real-time tracking of multiple particles is key for quantitative analysis of dynamic biophysical processes and materials science via time-lapse microscopy image data, especially for single molecule biophysical techniques, such as magnetic tweezers and centrifugal force microscopy. However, real-time multiple particle tracking with high resolution is limited by the current imaging processes or tracking algorithms. Here, we demonstrate 1 nm resolution in three dimensions in real-time with a graphics-processing unit (GPU) based on a compute unified device architecture (CUDA) parallel computing framework instead of only a central processing unit (CPU). We also explore the trade-offs between processing speed and size of the utilized regions of interest and a maximum speedup of 137 is achieved with the GPU compared with the CPU. Moreover, we utilize this method with our recently self-built centrifugal force microscope (CFM) in experiments that track multiple DNA-tethered particles. Our approach paves the way for high-throughput single molecule techniques with high resolution and efficiency. LAY DESCRIPTION: Particles are widely used as probes in life sciences through their motions. In single molecule techniques such as optical tweezers and magnetic tweezers, microbeads are used to study intermolecular or intramolecular interactions via beads tracking. Also tracking multiple beads' motions could study cell-cell or cell-ECM interactions in traction force microscopy. Therefore, particle tracking is of key important during these researches. However, parallel 3D multiple particle tracking in real-time with high resolution is a challenge either due to the algorithm or the program. Here, we combine the performance of CPU and CUDA-based GPU to make a hybrid implementation for particle tracking. In this way, a speedup of 137 is obtained compared the program before only with CPU without loss of accuracy. Moreover, we improve and build a new centrifugal force microscope for multiple single molecule force spectroscopy research in parallel. Then we employed our program into centrifugal force microscope for DNA stretching study. Our results not only demonstrate the application of this program in single molecule techniques, also indicate the capability of multiple single molecule study with centrifugal force microscopy.
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Affiliation(s)
- L Kou
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin, China
| | - L Jin
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin, China
| | - H Lei
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin, China
| | - C Hu
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin, China
| | - H Li
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin, China.,Department of Chemistry, University of British Columbia, Vancouver, BC, Canada
| | - X Hu
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin, China
| | - X Hu
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin, China
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Chen Y, Lei H, Zou X, Zheng T, Qiu H, Chen Y, He M, Du J, Zhou Q, Wu Y, Zhao P. Cohort Profile: The Chongqing Cancer Cohort Study (CCCS) of the Urban Population in Southwest China. J Glob Oncol 2018. [DOI: 10.1200/jgo.18.47700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Purpose: Urbanization is causing an increasingly negative effect on public health in China. This study was established to examine the associations between socio-economic and environmental exposures and the potential impact of gene-environment interactions and cancer risk of urban population in Chongqing, China. Participants: The cohort was established in Beibei District of Chongqing in southwest China. Between March 2016 and December 2016, we enrolled 57,332 adults who were 40-69 years of age, and collected baseline data on demographic information, socio-economic status, lifestyle, family and personal disease histories through face-to-face interviews using a standardized questionnaire. Regular follow-up including face-to-face interviews will take place every 5 years. Findings to date: Ninety-nine percent (56658/57332) of the participants completed the baseline assessment. The eligible participants had a mean age of 54.8 years, and 51.42% were females. Nearly three-fifths of participants having a normal BMI (18.5 to 23.9 kg/m2) and one-third being overweight (24.0 to 27.9 kg/m2). Among males, 29.58% were smokers and 21.08% were alcohol users. Among females, 1.49% were smokers and 1.66% were alcohol users. Among all participants, 7.03% of males and 9.08% of females reported their family history of cancer. Future plans: The relationships of modifiable risk factors with the cancer risk will be analyzed. Meanwhile, participants will be closely tracked to minimize loss to follow-up. We plan to construct a risk prediction model on cancer and verify the prediction model by genome-wide association studies (GWAS). The successful completion of this cohort study will allow for better targeting of cancer screening to those at highest risk in urban population of China and provide clinicians and policymakers with a practical predication rule.
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Affiliation(s)
- Y. Chen
- Cancer Foundation of China, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - H. Lei
- Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, Chongqing, China
| | - X. Zou
- National Office for Cancer Prevention and Control, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - T. Zheng
- Brown University, Department of Epidemiology School of Public Health, Providence, RI
| | - H. Qiu
- Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, Chongqing, China
| | - Y. Chen
- National Office for Cancer Prevention and Control, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - M. He
- Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, Chongqing, China
| | - J. Du
- Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, Chongqing, China
| | - Q. Zhou
- Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, Chongqing, China
| | - Y. Wu
- Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, Chongqing, China
| | - P. Zhao
- Cancer Foundation of China, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Gao MY, Sun CB, Lei H, Zeng JR, Zhang QB. Nitrate-induced and in situ electrochemical activation synthesis of oxygen deficiencies-rich nickel/nickel (oxy)hydroxide hybrid films for enhanced electrocatalytic water splitting. Nanoscale 2018; 10:17546-17551. [PMID: 30225498 DOI: 10.1039/c8nr06459h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Hydrogen produced by electrochemical water splitting offers a hopeful and renewable solution for addressing the global energy crisis; however, development of highly efficient non-noble-metal electrocatalysts remains a big challenge. Herein, we report a facile strategy to fabricate oxygen deficiencies-rich nickel/nickel (oxy)hydroxide hybrid films as efficient electrocatalysts for water splitting by in situ oxygen evolution reaction (OER) activation. Under OER conditions, the originally deposited Ni films from the ethaline-based deep eutectic solvent (DES) undergo a structural rearrangement with a phase transformation in the oxidation state from Ni(ii) to Ni(iii) at the surface. The change is coupled with an increase in oxygen deficiencies and a pronounced defective precursor is induced by the addition of nitrate ions, providing structural disordering and boosting the intrinsic activity of the catalyst, which strongly enhances the water splitting performance.
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Affiliation(s)
- M Y Gao
- Key Laboratory of Ionic Liquids Metallurgy, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, P.R. China.
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Lei H, Huang Z, Zhou F, Elazab A, Tan EL, Li H, Qin J, Lei B. Parkinson's Disease Diagnosis via Joint Learning From Multiple Modalities and Relations. IEEE J Biomed Health Inform 2018; 23:1437-1449. [PMID: 30183649 DOI: 10.1109/jbhi.2018.2868420] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Parkinson's disease (PD) is a neurodegenerative progressive disease that mainly affects the motor systems of patients. To slow this disease deterioration, early and accurate diagnosis of PD is an effective way, which alleviates mental and physical sufferings by clinical intervention. In this paper, we propose a joint regression and classification framework for PD diagnosis via magnetic resonance and diffusion tensor imaging data. Specifically, we devise a unified multitask feature selection model to explore multiple relationships among features, samples, and clinical scores. We regress four clinical variables of depression, sleep, olfaction, cognition scores, as well as perform the classification of PD disease from the multimodal data. The multitask model explores the relationships at the level of clinical scores, image features, and subjects, to select the most informative and diseased-related features for diagnosis. The proposed method is evaluated on the public Parkinson's progression markers initiative dataset. The extensive experimental results show that the multitask framework can effectively boost the performance of regression and classification and outperforms other state-of-the-art methods. The computerized predictions of clinical scores and label for PD diagnosis may offer quantitative reference for decision support as well.
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Li M, Lei H, Xu Y, Li H, Yang B, Yu C, Yuan Y, Fang D, Xin Z, Guan R. Exosomes derived from mesenchymal stem cells exert therapeutic effect in a rat model of cavernous nerves injury. Andrology 2018; 6:927-935. [PMID: 30009463 DOI: 10.1111/andr.12519] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 04/25/2018] [Accepted: 06/05/2018] [Indexed: 01/08/2023]
Affiliation(s)
- M. Li
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - H. Lei
- Department of Urology; Beijing Chao-Yang Hospital; Capital Medical University; Beijing China
| | - Y. Xu
- Department of Urology; First Hospital Affiliated to Chinese; PLA General Hospital; Beijing China
| | - H. Li
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - B. Yang
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - C. Yu
- Department of Urology; General Hospital of Ningxia Medical University; Ningxia Medical University; Ningxia China
| | - Y. Yuan
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - D. Fang
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - Z. Xin
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - R. Guan
- Molecular Biology Laboratory of Andrology Center; Peking University First Hospital; Peking University; Beijing China
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35
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Lei H, Wen Y, You Z, Elazab A, Tan EL, Zhao Y, Lei B. Protein-Protein Interactions Prediction via Multimodal Deep Polynomial Network and Regularized Extreme Learning Machine. IEEE J Biomed Health Inform 2018; 23:1290-1303. [PMID: 29994278 DOI: 10.1109/jbhi.2018.2845866] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Predicting the protein-protein interactions (PPIs) has played an important role in many applications. Hence, a novel computational method for PPIs prediction is highly desirable. PPIs endow with protein amino acid mutation rate and two physicochemical properties of protein (e.g., hydrophobicity and hydrophilicity). Deep polynomial network (DPN) is well-suited to integrate these modalities since it can represent any function on a finite sample dataset via the supervised deep learning algorithm. We propose a multimodal DPN (MDPN) algorithm to effectively integrate these modalities to enhance prediction performance. MDPN consists of a two-stage DPN, the first stage feeds multiple protein features into DPN encoding to obtain high-level feature representation while the second stage fuses and learns features by cascading three types of high-level features in the DPN encoding. We employ a regularized extreme learning machine to predict PPIs. The proposed method is tested on the public dataset of H. pylori, Human, and Yeast and achieves average accuracies of 97.87%, 99.90%, and 98.11%, respectively. The proposed method also achieves good accuracies on other datasets. Furthermore, we test our method on three kinds of PPI networks and obtain superior prediction results.
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36
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Cai X, Li F, Lei H, Qu S, Qian C, Xiang D, Wei DQ, Wu W, Xu Q, Wang X. p.R180C mutation of glycosyltransferase B leads to B subgroup, an in vitro and in silico study. Vox Sang 2018; 113:476-484. [PMID: 29726014 DOI: 10.1111/vox.12655] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/26/2018] [Accepted: 03/28/2018] [Indexed: 01/12/2023]
Abstract
BACKGROUND AND OBJECTIVES Dysfunctional glycosyltransferase A or B may lead to incomplete glycosylation of H antigen and atypical ABO blood group with weak A or B phenotypes, posing challenges for blood typing for transfusion. MATERIALS AND METHODS Serological studies and ABO gene analysis were performed. Flow cytometry was performed on HeLa cells transfected glycosyltransferase B expressing plasmids. Agglutination of transfected cells and total glycosyltransferase B transfer capacity were examined. Molecular dynamics simulations were used to explore possible dynamic conformational changes around the binding pocket. RESULTS We identified a mutation c.538C>T (p. R180C) of B allele in a Chinese donor and his father with ABw phenotype. In vitro expression study showed that mutation p.R180C, although not affecting expression of glycosyltransferase B, impaired H to B antigen conversion. The in silico analyses found that the residue Arg180 on the internal loop next to the entry of the binding pocket may have its long side chain salt-bridged with the highly flexible C-terminal carboxyl and contribute to the catalysis of H to B antigen conversion. CONCLUSION The p.R180C mutation impairs the conversion from H to B antigen and leads to weak B phenotype. Dynamic interaction between Arg180 and C-terminal of glycosyltransferase B may stabilize its binding with UDP-galactose and facilitate H/B antigen conversion.
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Affiliation(s)
- X Cai
- Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - F Li
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - H Lei
- Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - S Qu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - C Qian
- Blood Group Reference Laboratory, Shanghai Blood Center, Shanghai, China
| | - D Xiang
- Blood Group Reference Laboratory, Shanghai Blood Center, Shanghai, China
| | - D-Q Wei
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - W Wu
- Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Q Xu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - X Wang
- Ruijin Hospital, Medical School of Shanghai Jiao Tong University, Shanghai, China
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Lei H, Li Y, Xiao S, Lin C, Norris SL, Wei D, Hu Z, Ji S. Routes of transmission of influenza A H1N1, SARS CoV, and norovirus in air cabin: Comparative analyses. Indoor Air 2018; 28:394-403. [PMID: 29244221 PMCID: PMC7165818 DOI: 10.1111/ina.12445] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Accepted: 12/06/2017] [Indexed: 05/05/2023]
Abstract
Identifying the exact transmission route(s) of infectious diseases in indoor environments is a crucial step in developing effective intervention strategies. In this study, we proposed a comparative analysis approach and built a model to simulate outbreaks of 3 different in-flight infections in a similar cabin environment, that is, influenza A H1N1, severe acute respiratory syndrome (SARS) coronavirus (CoV), and norovirus. The simulation results seemed to suggest that the close contact route was probably the most significant route (contributes 70%, 95% confidence interval [CI]: 67%-72%) in the in-flight transmission of influenza A H1N1 transmission; as a result, passengers within 2 rows of the index case had a significantly higher infection risk than others in the outbreak (relative risk [RR]: 13.4, 95% CI: 1.5-121.2, P = .019). For SARS CoV, the airborne, close contact, and fomite routes contributed 21% (95% CI: 19%-23%), 29% (95% CI: 27%-31%), and 50% (95% CI: 48%-53%), respectively. For norovirus, the simulation results suggested that the fomite route played the dominant role (contributes 85%, 95% CI: 83%-87%) in most cases; as a result, passengers in aisle seats had a significantly higher infection risk than others (RR: 9.5, 95% CI: 1.2-77.4, P = .022). This work highlighted a method for using observed outbreak data to analyze the roles of different infection transmission routes.
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Affiliation(s)
- H. Lei
- Department of Mechanical EngineeringThe University of Hong KongPokfulamHong KongChina
| | - Y. Li
- Department of Mechanical EngineeringThe University of Hong KongPokfulamHong KongChina
| | - S. Xiao
- Department of Mechanical EngineeringThe University of Hong KongPokfulamHong KongChina
| | - C.‐H. Lin
- Environmental Control SystemsBoeing Commercial AirplanesEverettWAUSA
| | - S. L. Norris
- Environmental Control SystemsBoeing Commercial AirplanesEverettWAUSA
| | - D. Wei
- Boeing (China) Co. Ltd.BeijingChina
| | - Z. Hu
- Beijing Aeronautical Science & Technology Research Institute of COMACBeijingChina
| | - S. Ji
- Beijing Aeronautical Science & Technology Research Institute of COMACBeijingChina
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Lei H, Huang Z, Han T, Luo Q, Cai Y, Liu G, Lei B. Joint regression and classification via relational regularization for Parkinson's disease diagnosis. Technol Health Care 2018; 26:19-30. [PMID: 29689760 PMCID: PMC6027902 DOI: 10.3233/thc-174540] [Citation(s) in RCA: 3] [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] [Indexed: 12/13/2022]
Abstract
It is known that the symptoms of Parkinson’s disease (PD) progress successively, early and accurate diagnosis of the disease is of great importance, which slows the disease deterioration further and alleviates mental and physical suffering. In this paper, we propose a joint regression and classification scheme for PD diagnosis using baseline multi-modal neuroimaging data. Specifically, we devise a new feature selection method via relational learning in a unified multi-task feature selection model. Three kinds of relationships (e.g., relationships among features, responses, and subjects) are integrated to represent the similarities among features, responses, and subjects. Our proposed method exploits five regression variables (depression, sleep, olfaction, cognition scores and a clinical label) to jointly select the most discriminative features for clinical scores prediction and class label identification. Extensive experiments are conducted to demonstrate the effectiveness of the proposed method on the Parkinson’s Progression Markers Initiative (PPMI) dataset. Our experimental results demonstrate that multi-modal data can effectively enhance the performance in class label identification compared with single modal data. Our proposed method can greatly improve the performance in clinical scores prediction and outperforms the state-of-art methods as well. The identified brain regions can be recognized for further medical analysis and diagnosis.
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Affiliation(s)
- Haijun Lei
- Guangdong Province Key Laboratory of Popular High Performance Computers, Key Laboratory of Service Computing and Applications, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, Guangdong, China
| | - Zhongwei Huang
- Guangdong Province Key Laboratory of Popular High Performance Computers, Key Laboratory of Service Computing and Applications, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, Guangdong, China
| | - Tao Han
- Guangdong Province Key Laboratory of Popular High Performance Computers, Key Laboratory of Service Computing and Applications, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, Guangdong, China
| | - Qiuming Luo
- Guangdong Province Key Laboratory of Popular High Performance Computers, Key Laboratory of Service Computing and Applications, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, Guangdong, China
| | - Ye Cai
- Guangdong Province Key Laboratory of Popular High Performance Computers, Key Laboratory of Service Computing and Applications, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, Guangdong, China
| | - Gang Liu
- Guangdong Province Key Laboratory of Popular High Performance Computers, Key Laboratory of Service Computing and Applications, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, Guangdong, China
| | - Baiying Lei
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Health Science Center, School of Biomedical Engineering, Shenzhen University, Shenzhen, Guangdong, China
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Abstract
This paper solves the multi-class classification problem for Parkinson's disease (PD) analysis by a sparse discriminative feature selection framework. Specifically, we propose a framework to construct a least square regression model based on the Fisher's linear discriminant analysis (LDA) and locality preserving projection (LPP). This framework utilizes the global and local information to select the most relevant and discriminative features to boost classification performance. Differing in previous methods for binary classification, we perform a multi-class classification for PD diagnosis. Our proposed method is evaluated on the public available Parkinson's progression markers initiative (PPMI) datasets. Extensive experimental results indicate that our proposed method identifies highly suitable regions for further PD analysis and diagnosis and outperforms state-of-the-art methods.
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Affiliation(s)
- Haijun Lei
- College of Computer Science and Software Engineering, Shenzhen University, Key Laboratory of Service Computing and Applications, Guangdong Province Key Laboratory of Popular High Performance Computers, Shenzhen, Guangdong, China
| | - Yujia Zhao
- College of Computer Science and Software Engineering, Shenzhen University, Key Laboratory of Service Computing and Applications, Guangdong Province Key Laboratory of Popular High Performance Computers, Shenzhen, Guangdong, China
| | - Yuting Wen
- College of Computer Science and Software Engineering, Shenzhen University, Key Laboratory of Service Computing and Applications, Guangdong Province Key Laboratory of Popular High Performance Computers, Shenzhen, Guangdong, China
| | - Qiuming Luo
- College of Computer Science and Software Engineering, Shenzhen University, Key Laboratory of Service Computing and Applications, Guangdong Province Key Laboratory of Popular High Performance Computers, Shenzhen, Guangdong, China
| | - Ye Cai
- College of Computer Science and Software Engineering, Shenzhen University, Key Laboratory of Service Computing and Applications, Guangdong Province Key Laboratory of Popular High Performance Computers, Shenzhen, Guangdong, China
| | - Gang Liu
- College of Computer Science and Software Engineering, Shenzhen University, Key Laboratory of Service Computing and Applications, Guangdong Province Key Laboratory of Popular High Performance Computers, Shenzhen, Guangdong, China
| | - Baiying Lei
- School of Biomedical Engineering, Health Science Center, Shenzhen University, National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Shenzhen, Guangdong, China
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Lei H, Huang W. [Hypertension: development history, current progress status and future prospective]. Zhonghua Xin Xue Guan Bing Za Zhi 2017; 45:697-700. [PMID: 28851187 DOI: 10.3760/cma.j.issn.0253-3758.2017.08.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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Huntzinger DN, Michalak AM, Schwalm C, Ciais P, King AW, Fang Y, Schaefer K, Wei Y, Cook RB, Fisher JB, Hayes D, Huang M, Ito A, Jain AK, Lei H, Lu C, Maignan F, Mao J, Parazoo N, Peng S, Poulter B, Ricciuto D, Shi X, Tian H, Wang W, Zeng N, Zhao F. Uncertainty in the response of terrestrial carbon sink to environmental drivers undermines carbon-climate feedback predictions. Sci Rep 2017; 7:4765. [PMID: 28684755 PMCID: PMC5500546 DOI: 10.1038/s41598-017-03818-2] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 05/05/2017] [Indexed: 11/17/2022] Open
Abstract
Terrestrial ecosystems play a vital role in regulating the accumulation of carbon (C) in the atmosphere. Understanding the factors controlling land C uptake is critical for reducing uncertainties in projections of future climate. The relative importance of changing climate, rising atmospheric CO2, and other factors, however, remains unclear despite decades of research. Here, we use an ensemble of land models to show that models disagree on the primary driver of cumulative C uptake for 85% of vegetated land area. Disagreement is largest in model sensitivity to rising atmospheric CO2 which shows almost twice the variability in cumulative land uptake since 1901 (1 s.d. of 212.8 PgC vs. 138.5 PgC, respectively). We find that variability in CO2 and temperature sensitivity is attributable, in part, to their compensatory effects on C uptake, whereby comparable estimates of C uptake can arise by invoking different sensitivities to key environmental conditions. Conversely, divergent estimates of C uptake can occur despite being based on the same environmental sensitivities. Together, these findings imply an important limitation to the predictability of C cycling and climate under unprecedented environmental conditions. We suggest that the carbon modeling community prioritize a probabilistic multi-model approach to generate more robust C cycle projections.
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Affiliation(s)
- D N Huntzinger
- School of Earth Sciences and Environmental Sustainability, Northern Arizona University, P.O. Box 5694, Flagstaff, Arizona, 86011-5694, USA.
| | - A M Michalak
- Department of Global Ecology, Carnegie Institution for Science, Stanford, California, USA
| | - C Schwalm
- School of Earth Sciences and Environmental Sustainability, Northern Arizona University, P.O. Box 5694, Flagstaff, Arizona, 86011-5694, USA
- Woods Hole Research Center, Falmouth, MA, 02540, USA
| | - P Ciais
- Laboratoire des Sciences du Climat et de l'Environnement, IPSL-LSCE CEA CNRS UVSQ, 91191, Gif sur, Yvette, France
| | - A W King
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Y Fang
- Department of Global Ecology, Carnegie Institution for Science, Stanford, California, USA
| | - K Schaefer
- National Snow and Ice Data Center, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USA
| | - Y Wei
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - R B Cook
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - J B Fisher
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
| | - D Hayes
- School of Forest Resources, University of Maine, Orno, ME, USA
| | - M Huang
- Atmospheric and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - A Ito
- National Institute for Environmental Studies, Tsukuba, Japan
| | - A K Jain
- Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - H Lei
- Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, USA
- State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, China
| | - C Lu
- Department of Ecology, Evolution and Organismal Biology, Iowa State University, Ames, IA, USA
| | - F Maignan
- Laboratoire des Sciences du Climat et de l'Environnement, IPSL-LSCE CEA CNRS UVSQ, 91191, Gif sur, Yvette, France
| | - J Mao
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - N Parazoo
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
| | - S Peng
- Laboratoire des Sciences du Climat et de l'Environnement, IPSL-LSCE CEA CNRS UVSQ, 91191, Gif sur, Yvette, France
| | - B Poulter
- Department of Ecology, Montana State University, Bozeman, MT, USA
| | - D Ricciuto
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - X Shi
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - H Tian
- International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn University, Auburn, Alabama, USA
| | - W Wang
- Ames Research Center, National Aeronautics and Space Administration, Moffett Field, California, USA
| | - N Zeng
- Department of Atmospheric and Oceanic Science, University of Maryland, College Park, Maryland, USA
| | - F Zhao
- Department of Atmospheric and Oceanic Science, University of Maryland, College Park, Maryland, USA
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Xie Z, Zhang M, Xiong W, Wan HY, Zhao XC, Xie T, Lei H, Lin ZC, Luo DS, Liang XL, Chen YH. Immunotolerant indoleamine-2,3-dioxygenase is increased in condyloma acuminata. Br J Dermatol 2017; 177:809-817. [PMID: 28132413 DOI: 10.1111/bjd.15356] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/22/2017] [Indexed: 01/06/2023]
Abstract
BACKGROUND The tryptophan-depleting enzyme indoleamine-2,3-dioxygenase (IDO) is critical for the regulation of immunotolerance and plays an important role in immune-associated skin diseases. OBJECTIVES To analyse the level of IDO in condyloma acuminata (CA) and its role in this condition. METHODS IDO expression was assessed in the skin and peripheral blood of healthy controls and patients with CA. To assess the role of skin IDO in immunity, the ability of isolated epidermal cells to metabolize tryptophan and the influence on polyclonal T-cell mitogen (PHA)-stimulated T-cell proliferation were explored. RESULTS IDO median fluorescence intensities in peripheral blood mononuclear cells from patients with CA were similar to those from healthy controls. Immunohistochemistry showed that IDO+ cells were rare in normal skin and the control skin of patients with CA, but were greatly accumulated in wart tissue. Most fluorescence signals of IDO+ cells did not overlap with those of CD1a+ Langerhans cells. Human papillomavirus (HPV) DNA probe in situ hybridization showed a large number of IDO+ cells in the HPV- site. Keratinocytes in the skin of healthy controls and the circumcised skin of patients with CA could minimally transform tryptophan into kynurenine, but IDO-competent epidermal cells from warts could transform tryptophan. In addition, these IDO-competent epidermal cells could inhibit PHA-stimulated T-cell proliferation. The addition of an IDO inhibitor, 1-methyl-d-tryptophan, restored the inhibited T-cell proliferation. CONCLUSIONS Abnormally localized high IDO expression might be involved in the formation of a local immunotolerant microenvironment.
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Affiliation(s)
- Z Xie
- Department of Dermatology, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - M Zhang
- Department of Gastroenterology, the Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - W Xiong
- Division of Urology and Transplantation, Department of Surgery, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - H Y Wan
- Department of Dermatology, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - X C Zhao
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China.,Nanfang Medical University, Guangzhou, China
| | - T Xie
- Department of Dermatology, Guangdong Provincial Hospital of Chinese Hospital, Guangzhou, China
| | - H Lei
- Department of Dermatology, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - Z C Lin
- Department of Dermatology, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - D S Luo
- Department of Dermatology, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Chengdu, China
| | - X L Liang
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Y H Chen
- Division of Nephrology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
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Abstract
Though there are many computational models proposed for saliency detection, few of them take object boundary information into account. This paper presents a hierarchical saliency detection model incorporating probabilistic object boundaries, which is based on the observation that salient objects are generally surrounded by explicit boundaries and show contrast with their surroundings. We perform adaptive thresholding operation on ultrametric contour map, which leads to hierarchical image segmentations, and compute the saliency map for each layer based on the proposed robust center bias, border bias, color dissimilarity and spatial coherence measures. After a linear weighted combination of multi-layer saliency maps, and Bayesian enhancement procedure, the final saliency map is obtained. Extensive experimental results on three challenging benchmark datasets demonstrate that the proposed model outperforms eight state-of-the-art saliency detection models.
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Affiliation(s)
- Haijun Lei
- College of Computer Science and Software Engineering, Shenzhen University, P. R. China
| | - Hai Xie
- College of Information Engineering, Shenzhen University, P. R. China
| | - Wenbin Zou
- College of Information Engineering, Shenzhen University, P. R. China
- IETR, UMR CNRS 6164, INSA de Rennes, Université Européenne de Bretagne, France
| | - Xiaoli Sun
- College of Mathematics, Shenzhen University, P. R. China
| | - Kidiyo Kpalma
- IETR, UMR CNRS 6164, INSA de Rennes, Université Européenne de Bretagne, France
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Xu Y, Xin H, Wu Y, Guan R, Lei H, Fu X, Xin Z, Yang Y. Effect of icariin in combination with daily sildenafil on penile atrophy and erectile dysfunction in a rat model of bilateral cavernous nerves injury. Andrology 2017; 5:598-605. [PMID: 28296277 DOI: 10.1111/andr.12341] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 12/19/2016] [Accepted: 01/24/2017] [Indexed: 12/25/2022]
Affiliation(s)
- Y. Xu
- Wound Healing and Cell Biology Laboratory; Institute of Basic Medical Science; Chinese PLA General Hospital; Beijing China
| | - H. Xin
- Department of Ophthalmology; Beijing ChaoYang Hospital; Capital Medical University; Beijing China
| | - Y. Wu
- Department of Urology; First Hospital Affiliated to Chinese PLA General Hospital; Beijing China
| | - R. Guan
- Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - H. Lei
- Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - X. Fu
- Wound Healing and Cell Biology Laboratory; Institute of Basic Medical Science; Chinese PLA General Hospital; Beijing China
| | - Z. Xin
- Andrology Center; Peking University First Hospital; Peking University; Beijing China
| | - Y. Yang
- Department of Urology; First Hospital Affiliated to Chinese PLA General Hospital; Beijing China
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Lei H, Yang T, Mahmood S, Roy BC, Li C, Plastow GS, Bruce HL. A Case-Control Genome-Wide Association Study of Dark-Cutting in 2 Beef Cattle Populations. Meat and Muscle Biology 2017. [DOI: 10.22175/rmc2017.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Hui Y, Yang B, Lei H, Guan R, Xin Z. 148 Therapeutic Effects of Adipose-Derived Stem Cells-Based Micro-Tissues on Erectile Dysfunction in Streptozotocin-Induced Diabetic Rats. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.097] [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: 11/24/2022]
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Lei H, Zhang C, Li C, Plastow G, Bruce H. Changes in Meat Quality and Genetic Parameter Estimation between Fresh and Frozen-Thawed Samples in Crossbred Commercial Pigs. Meat and Muscle Biology 2017. [DOI: 10.22175/rmc2016.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Li M, Yang B, Guan R, Lei H, Xin Z. 394 Therapeutic Potential of Adipose-Derived Stem Cells-Based Micro-Tissues in a Rat Model of Stress Urinary Incontinence. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.273] [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: 10/20/2022]
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Zhu H, Lei H, Wang Q, Fu J, Song Y, Shen L, Huang W. Serum carcinogenic antigen (CA)-125 and CA 19-9 combining pain score in the diagnosis of pelvic endometriosis in infertile women. CLIN EXP OBSTET GYN 2016. [DOI: 10.12891/ceog3140.2016] [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: 11/01/2022]
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Wang S, Yang X, Su M, Liu Q, Gong T, Mao Q, Zhao S, Han F, Mao K, Liu Y, Zhu Y, Li S, Yang J, Fu N, Yu S, Li R, Xiong J, Xie Y, Wang S, Du S, Chen Z, Phillips P, Chen S, Lu Z, Sun P, Dong Z, Zhang Y, Zhuang J, Zheng J, Bai M, Mao N, Mu X, Xu C, Song Y, Song X, Wang B, Xie H, Gan K, Luo D, Mao K, Deng Z, Yang J, Zhu Y, Li S, Fu N, Yu S, Li R, Xie Y, Shi Z, Ma J, Zhao M, Liu Y, Wang Y, Li S, Zhu Y, Yang J, Gao S, Fu N, Yu S, Xie Y, Wang Y, Liu G, Li W, Tu C, Li L, Cai A, Wang L, Bu H, Yan B, Ho J, Chang Y, Manousakas I, Wei C, Sun X, Park J, Kim S, Kang K, Zhang J, Zhao F, Li G, Ren Y, Chen Y, Zhang X, Yu Z, Ni D, Chen S, Li S, Wang T, Lei B, Li YF, Zhang L, Yan C, Yang H, Sun B, Ding Y, Zhang Y, Zhan Y, Gong T, Wu Y, Huang Z, Zhang T, Fang H, Zhang Y, Song Z, Wang M, Li W, Yang C, Shi F, Wang Q, Wu S, Lu W, Li S, Farokhian F, Nie Y, Zhang X, Li Q, Yang D, Liang Y, Sheng S, Cheng X, Gai B, Li B, Hu X, Farokhian F, Yang C, Beheshti I, Demirel H, Wu S, Li W, Nie Y, Yang C, Wang Q, Ren J, Li W, Zhang X, Lai F, Jin M, Liu Y, Ding M, Zhou Y, Gong H, Peng W, Gong T, Liang W, Zhao L, Li K, Yin J, Wang M, Liu W, Gao Z, Tan L, Gan K, Luo D, Duan S, Lin S, Zhong H, Lv S, Lei H, Zhang J, Yang Z, Lei B. The 5th International Conference on Biomedical Engineering and Biotechnology (ICBEB 2016). BMC Med Imaging 2016. [PMCID: PMC5385918 DOI: 10.1186/s12880-016-0164-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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