1
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Zhang M, Wu C, Zhang H, Yang N, Wang C, Jike X, Zhang T, Lei H. Comparison of different drying technologies for kiwifruit pomace: Changes in physical characteristics, nutritional properties and antioxidant capacities. Food Chem 2024; 451:139497. [PMID: 38692240 DOI: 10.1016/j.foodchem.2024.139497] [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: 02/02/2024] [Revised: 04/11/2024] [Accepted: 04/24/2024] [Indexed: 05/03/2024]
Abstract
The objective of this study was to evaluate the impacts of different drying technologies including microwave drying (MD), vacuum microwave drying (VMD), sun drying (SD), vacuum drying (VD), hot air drying (HAD), and vacuum freeze drying (VFD) on the physical characteristics, nutritional properties and antioxidant capacities of kiwifruit pomace in order to realize by-product utilization and improve energy efficiency. Results showed that both MD and VMD significantly reduced drying time by >94.6%, compared to traditional thermal drying which took 14-48 h. MD exhibited the highest content of soluble dietary fiber (9.5%) and the lowest energy consumption. Furthermore, VMD resulted in the highest content of vitamin C (198.78 mg/100 g) and reducing sugar (73.78%), and the antioxidant capacities ranked only second to VFD. Given the financial advantages and product quality, VMD was suggested to be advantageous technology in actual industrial production.
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Affiliation(s)
- Mengmeng Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Caiyun Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Hexin Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Nana Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Chengxin Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Xiaolan Jike
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Ting Zhang
- Institute of Farm Product Storage and Processing, Xinjiang Academy of Agricultural Science, Urumqi 830091, China.
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
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2
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Feng Y, Zeng J, Lei H, Zhao M. Effect of fermentation containers on the taste characteristics and microbiota succession of soy sauce. Food Chem 2024; 448:139066. [PMID: 38569402 DOI: 10.1016/j.foodchem.2024.139066] [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: 10/26/2023] [Revised: 03/06/2024] [Accepted: 03/16/2024] [Indexed: 04/05/2024]
Abstract
Modernization of the traditional fermentation industry has been a major trend recently, such as the upgrading of fermentation containers. This study investigated the taste differences and their material basis of soy sauce fermented in tank and pond (SSFT and SSFP), and further explore the key influencing factors of taste. The intensities of umami, kokumi and sour taste in SSFT were weaker than SSFP, which were associated with 9 basic taste-active compounds, including acetic acid, lactic acid, propanedioic acid, citric acid, glutamic acid, alanine, tyrosine, d-galactose and erythritol. Moreover, 270 peptides and amino acid derivatives were potential compounds for taste difference, of which 78 % were more abundant in SSFP. Five bacterial genera (Kocuria, Tetragenococcus, Pediococcus, Staphylococcus, Weissella) and 4 fungal genera (Wickerhamiella, Millerozyma, Candida, Zygosaccharomyces) may be the functional core microbe for flavor differences in SSFT and SSFP. This study will provide theoretical value for quality improvement in the modern large-scale production of soy sauce.
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Affiliation(s)
- Yunzi Feng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China
| | - Jing Zeng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Mouming Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Food Green Processing and Nutrition Regulation Technologies Research Center, Guangzhou 510650, China.
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3
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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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4
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Wu C, Zhang H, Yang N, Liu N, Yang H, Xu H, Lei H. Antioxidant Dipeptides Enhance Osmotic Stress Tolerance by Regulating the Yeast Cell Wall and Membrane. J Agric Food Chem 2024; 72:4339-4347. [PMID: 38351620 DOI: 10.1021/acs.jafc.3c09320] [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] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
This study aimed to investigate the role of the yeast cell wall and membrane in enhancing osmotic tolerance by antioxidant dipeptides (ADs) including Ala-His (AH), Thr-Tyr (TY), and Phe-Cys (FC). Results revealed that ADs could improve the integrity of the cell wall by restructuring polysaccharide structures. Specifically, FC significantly (p < 0.05) reduced the leakage of nucleic acid and protein by 2.86% and 5.36%, respectively, compared to the control. In addition, membrane lipid composition played a crucial role in enhancing yeast tolerance by ADs, including the increase of cell membrane integrity and the decrease of permeability by regulating the ratio of unsaturated fatty acids. The up-regulation of gene expression associated with the cell wall integrity pathway (RLM1, SLT2, MNN9, FKS1, and CHS3) and fatty acid biosynthesis (ACC1, HFA1, OLE1, ERG1, and FAA1) further confirmed the positive impact of ADs on yeast tolerance against osmotic stress.
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Affiliation(s)
- Caiyun Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Hexin Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Nana Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Na Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Huirong Yang
- College of Food Science and Technology, Southwest Minzu University, Chengdu 610041, China
| | - Huaide Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
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5
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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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6
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Wu C, Wang C, Guo J, Jike X, Yang H, Xu H, Lei H. Plant-derived antioxidant dipeptides provide lager yeast with osmotic stress tolerance for very high gravity fermentation. Food Microbiol 2024; 117:104396. [PMID: 37919005 DOI: 10.1016/j.fm.2023.104396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 09/30/2023] [Accepted: 10/02/2023] [Indexed: 11/04/2023]
Abstract
Osmotic stress in the yeast limits productivity in industrial beer production under very high gravity brewing. This study focused on assessing the protective impacts of eleven plant-derived antioxidant dipeptides (PADs) on the osmotic stress tolerance of lager yeast. The results showed that PADs provided yeast with stress tolerance under osmotic stress. PADs supplementation enhanced cell membrane integrity and reduced oxidative damage. PADs upregulated the expression of SOD2, PEX11 and CTT1 genes under osmotic stress. Moreover, the volatile compounds contents and antioxidant activities of beers were improved by PADs, suggesting favorable quality characteristics. Especially, Phe-Cys and Leu-His could increase the DPPH radical scavenging activity of beer by 41.92% and 18.78% respectively, compared with control. Therefore, PADs are industrially scalable enhancers to improve the ability of yeast to resist osmotic stress and beer quality during very high gravity brewing.
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Affiliation(s)
- Caiyun Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Chengxin Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Jiayu Guo
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Xiaolan Jike
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Huirong Yang
- College of Food Science and Technology, Southwest Minzu University, Chengdu, 610041, China.
| | - Huaide Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
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7
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Guo J, Jike X, Wu C, Liu L, Wang C, Xu K, Li B, Xu H, Lei H. Phytochemicals, antioxidant capacities and volatile compounds changes in fermented spicy Chinese cabbage sauces treated by thermal and non-thermal technologies. Food Res Int 2024; 176:113803. [PMID: 38163684 DOI: 10.1016/j.foodres.2023.113803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 11/29/2023] [Accepted: 12/02/2023] [Indexed: 01/03/2024]
Abstract
To extend shelf life of fermented spicy Chinese cabbage sauce at room temperature, the effects of electron beam irradiation (EBI), high pressure processing (HPP), pasteurization (PT) and autoclave sterilization (AS) treatments on the colony counts of Lactobacillus plantarum, phytochemicals, antioxidant activities and volatile compounds were investigated. Results showed that thermal and non-thermal treatments could significantly decrease the colony counts of Lactobacillus plantarum, in which EBI and AS treatments inactivated Lactobacillus plantarum thoroughly. EBI and HPP treatments were superior to PT and AS treatments in terms of volatile compounds, bioactive compounds and antioxidant activities. The total contents of volatile compounds in sauces treated by EBI and HPP were significantly increased by 43.92%-61.87% and 71.53%-84.46%, respectively, and the new formed substance 2,3-butanedione endowed sauces with sweet and creamy aroma. In addition, HPP treatment improved the extractable contents of total phenolics and carotenoids, retained capsicum red pigment content, and significantly enhanced antioxidant capacities of sauces. Sauce treated by HPP at 200 MPa exhibited the highest total carotenoid content, DPPH radical scavenging activity and FRAP, increasing by 9.27%, 2.24% and 16.13%, respectively, compared with CK. EBI treatment exhibited higher total phenolic content and FRAP, which positively depended on the dose. Therefore, HPP and EBI treatments were suggested as potential technologies to improve shelf-life stability and volatile compounds of fermented spicy Chinese cabbage sauce.
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Affiliation(s)
- Jiayu Guo
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Xiaolan Jike
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Caiyun Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Li Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Chengxin Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Kang Xu
- Qingjian Beiguo Jujube Industry Co., Ltd, Yulin, Shaanxi, 718300, China.
| | - Bing Li
- Qingjian Beiguo Jujube Industry Co., Ltd, Yulin, Shaanxi, 718300, China.
| | - Huaide Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
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8
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Wu C, Wang J, Liu N, Chen X, Xu H, Lei H. Phytochemical Properties and Antioxidant Capacities of Apple Juice Fermented by Probiotics During Refrigerated Storage and Simulated Gastrointestinal Digestion. Appl Biochem Biotechnol 2023; 195:6032-6049. [PMID: 36418709 DOI: 10.1007/s12010-022-04255-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2022] [Indexed: 11/24/2022]
Abstract
The phytochemical characteristics and antioxidant capacities of fermented apple juice (FAJ) by Lactobacillus plantarum 90 (Lp90) and Lactobacillus acidophilus 85 (La85) during refrigerated storage and simulated gastrointestinal digestion (SGD) were investigated. Viable counts of Lp90 and La85 were decreased, while phenolic content and antioxidant capacities were improved during refrigerated storage, especially for the increased chlorogenic acid content. Ester content was decreased slightly after refrigeration, while the primary esters including ethyl acetate, amyl acetate, and ethyl 2-methylbutyrate were significantly increased (p < 0.05). Furthermore, ketone content was increased significantly after refrigeration (p < 0.05). In addition, viable counts of Lp90 and La85 remained higher than 6 log CFU/mL after SGD. The presence of probiotics delayed the decrease of 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging ability and increased ferric reducing antioxidant power (FRAP) of FAJ. The contents of gallic acid, chlorogenic acid, epicatechin, ferulic acid, and phlorizin were decreased, while ellagic acid and rutin contents in FAJ were significantly increased after SGD (p < 0.05).
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Affiliation(s)
- Caiyun Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China
| | - Jun Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Ning Liu
- College of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
| | - Xuefeng Chen
- College of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
| | - Huaide Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
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Wu C, Guo J, Jian H, Liu L, Zhang H, Yang N, Xu H, Lei H. Bioactive dipeptides enhance the tolerance of lager yeast to ethanol-oxidation cross-stress by regulating the multilevel defense system. Food Microbiol 2023; 114:104288. [PMID: 37290871 DOI: 10.1016/j.fm.2023.104288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 04/14/2023] [Accepted: 04/17/2023] [Indexed: 06/10/2023]
Abstract
Although high gravity brewing technology has been widely used for beer industries due to its economic benefits, yeast cells are subjected to multiple environmental stresses throughout the fermentation process. Eleven bioactive dipeptides (LH, HH, AY, LY, IY, AH, PW, TY, HL, VY, FC) were selected to evaluate their effects on cell proliferation, cell membrane defense system, antioxidant defense system and intracellular protective agents of lager yeast against ethanol-oxidation cross-stress. Results showed that the multiple stresses tolerance and fermentation performance of lager yeast were enhanced by bioactive dipeptides. Cell membrane integrity was improved by bioactive dipeptides through altering the structure of macromolecular compounds of the cell membrane. Intracellular reactive oxygen species (ROS) accumulation was significantly decreased by bioactive dipeptides, especially for FC, decreasing by 33.1%, compared with the control. The decrease of ROS was closely related to the increase of mitochondrial membrane potential, intracellular antioxidant enzyme activities including superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD), and glycerol level. In addition, bioactive dipeptides could regulate the expression of key genes (GPD1, OLE1, SOD2, PEX11, CTT1, HSP12) to enhance the multilevel defense systems under ethanol-oxidation cross-stress. Therefore, bioactive dipeptides should be potentially efficient and feasible bioactive ingredients to improve the multiple stresses tolerance of lager yeast during high gravity fermentation.
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Affiliation(s)
- Caiyun Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Jiayu Guo
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Haoyu Jian
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Li Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Hexin Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Nana Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Huaide Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
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10
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Wu C, Liu L, Zhang M, Jike X, Zhang H, Yang N, Yang H, Xu H, Lei H. Mechanisms of Antioxidant Dipeptides Enhancing Ethanol-Oxidation Cross-Stress Tolerance in Lager Yeast: Roles of the Cell Wall and Membrane. J Agric Food Chem 2023; 71:12538-12548. [PMID: 37578164 DOI: 10.1021/acs.jafc.3c03793] [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] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
High concentrations of ethanol could cause intracellular oxidative stress in yeast, which can lead to ethanol-oxidation cross-stress. Antioxidant dipeptides are effective in maintaining cell viability and stress tolerance under ethanol-oxidation cross-stress. In this study, we sought to elucidate how antioxidant dipeptides affect the yeast cell wall and membrane defense systems to enhance stress tolerance. Results showed that antioxidant dipeptide supplementation reduced cell leakage of nucleic acids and proteins by changing cell wall components under ethanol-oxidation cross-stress. Antioxidant dipeptides positively modulated the cell wall integrity pathway and up-regulated the expression of key genes. Antioxidant dipeptides also improved the cell membrane integrity by increasing the proportion of unsaturated fatty acids and regulating the expression of key fatty acid synthesis genes. Moreover, the addition of antioxidant dipeptides significantly (p < 0.05) increased the content of ergosterol. Ala-His (AH) supplementation caused the highest content of ergosterol, with an increase of 23.68 ± 0.01% compared to the control, followed by Phe-Cys (FC) and Thr-Tyr (TY). These results revealed that the improvement of the cell wall and membrane functions of antioxidant dipeptides was responsible for enhancing the ethanol-oxidation cross-stress tolerance of yeast.
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Affiliation(s)
- Caiyun Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Li Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Mengmeng Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Xiaolan Jike
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Hexin Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Nana Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Huirong Yang
- College of Food Science and Technology, Southwest Minzu University, Chengdu 610041, China
| | - Huaide Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
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11
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Xing Y, Wang K, Zhang M, Law CL, Lei H, Wang J, Xu H. Pectin-interactions and the digestive stability of anthocyanins in thermal and non-thermal processed strawberry pulp. Food Chem 2023; 424:136456. [PMID: 37267648 DOI: 10.1016/j.foodchem.2023.136456] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/18/2023] [Accepted: 05/22/2023] [Indexed: 06/04/2023]
Abstract
This study investigated the digestive stability of anthocyanins (ACNs) and their interaction with three pectin fractions-water-soluble pectin (WSP), cyclohexanetrans-1,2-diamine tetra-acetic acid-soluble pectin (CSP), and sodium carbonate-soluble pectin (NSP)-in strawberry pulp processed by pasteurization (PS), ultrasound (US), electron beam (EB) irradiation, and high pressure (HP). Compared with the control group, the ACNs content increased to the highest level (312.89 mg/mL), but the retention rate of ACNs in the simulated intestine decreased significantly after US treatment. The monosaccharide compositions indicated that the WSP and CSP possessed more homogalacturonan (HG) domains than the NSP, which contains more rhamngalacturonan-I (RG-I) domains. The microstructure of US-treated pectin was damaged and fragmented. Comprehensive analysis showed that the retention rate of ACNs was closely related to the pectin structure, primarily reflected by the degree of linearity and the integrity of structure. These results revealed the structure-activity relationship between ACNs and pectin during pulp processing.
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Affiliation(s)
- Ying Xing
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; Department of Life Science, Yuncheng University, Yuncheng, Shanxi 044000, China
| | - Kunhua Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Mengyao Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chung-Lim Law
- Department of Chemical and Environmental Engineering, University of Nottingham, Malaysia Campus, Selangor, Malaysia
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jun Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Huaide Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China.
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12
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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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13
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Dong X, Wan C, Huang A, Xu H, Lei H. Novel Umami Peptides from Hypsizygus marmoreus and Interaction with Umami Receptor T1R1/T1R3. Foods 2023; 12:foods12040703. [PMID: 36832778 PMCID: PMC9955199 DOI: 10.3390/foods12040703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/18/2023] [Accepted: 01/31/2023] [Indexed: 02/09/2023] Open
Abstract
Umami peptides are important taste components of foods. In this study, umami peptides from Hypsizygus marmoreus hydrolysate were purified through ultrafiltration, gel filtration chromatography, and RP-HPLC, and then identified using LC-MS/MS. The binding mechanism of umami peptides with the receptor, T1R1/T1R3, was investigated using computational simulations. Five novel umami peptides were obtained: VYPFPGPL, YIHGGS, SGSLGGGSG, SGLAEGSG, and VEAGP. Molecular docking results demonstrated that all five umami peptides could enter the active pocket in T1R1; Arg277, Tyr220, and Glu301 were key binding sites; and hydrogen bonding and hydrophobic interaction were critical interaction forces. VL-8 had the highest affinity for T1R3. Molecular dynamics simulations demonstrated that VYPFPGPL (VL-8) could be steadily packed inside the binding pocket of T1R1 and the electrostatic interaction was the dominant driving force of the complex (VL-8-T1R1/T1R3) formation. Arg residues (151, 277, 307, and 365) were important contributors to binding affinities. These findings provide valuable insights for the development of umami peptides in edible mushrooms.
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Affiliation(s)
| | | | | | | | - Hongjie Lei
- Correspondence: ; Tel./Fax: +86-029-87092486
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14
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Yang N, Wu C, Yang H, Guo Z, Jian H, Jiang T, Lei H. Bioactive compounds, antioxidant activities and flavor volatiles of lager beer produced by supplementing six jujube cultivars as adjuncts. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102008] [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: 11/27/2022]
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15
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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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16
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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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17
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Wang Z, Feng Y, Yang N, Jiang T, Xu H, Lei H. Fermentation of kiwifruit juice from two cultivars by probiotic bacteria: Bioactive phenolics, antioxidant activities and flavor volatiles. Food Chem 2022; 373:131455. [PMID: 34731808 DOI: 10.1016/j.foodchem.2021.131455] [Citation(s) in RCA: 49] [Impact Index Per Article: 24.5] [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: 06/14/2021] [Revised: 09/18/2021] [Accepted: 10/20/2021] [Indexed: 12/13/2022]
Abstract
Three commercial lactic acid bacteria (LAB), namely Lactobacillus acidophilus 85 (La85), Lactobacillus helveticus 76 (Lh76) and Lactobacillus plantarum 90 (Lp90), were employed to investigate the effects on the phenolic compounds, antioxidant capacities and flavor volatiles of kiwifruit juices prepared from two cultivars (Actinidia deliciosa cv. Xuxiang and Actinidia chinensis cv. Hongyang). Results showed that both kiwifruit juices were favorable matrices for LAB growth and the colony counts remained above 9.0 log CFU/mL after fermentation. Total phenolics and flavonoids in Xuxiang and Hongyang juices were increased dramatically by Lh76. Correspondingly, antioxidant capacities based on DPPH, ABTS and FRAP methods were improved significantly and positively correlated with protocatechuic acid and catechin contents (p < 0.05), two newly formed phytochemicals in fermented kiwifruit juices. Furthermore, results of hierarchical cluster analysis revealed that flavor profiles were improved significantly by LAB, and there were noticeable differences between fermented Xuxiang and Hongyang juices.
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Affiliation(s)
- Zining Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Yunzi Feng
- College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, China
| | - Nana Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Tian Jiang
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Huaide Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
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18
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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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20
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Li F, Lei H, Xu H. Influences of subcritical water extraction on the characterization and biological properties of polysaccharides from
Morchella sextelata. J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.16024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Feng Li
- College of Food Science and Engineering Northwest A&F University Yangling China
| | - Hongjie Lei
- College of Food Science and Engineering Northwest A&F University Yangling China
| | - Huaide Xu
- College of Food Science and Engineering Northwest A&F University Yangling China
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21
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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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22
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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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Wang X, Peng F, Liu F, Xiao Y, Li F, Lei H, Wang J, Li M, Xu H. Zein-pectin composite nanoparticles as an efficient hyperoside delivery system: Fabrication, characterization, and in vitro release property. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109869] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [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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24
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Li T, Jiang T, Liu N, Wu C, Xu H, Lei H. Biotransformation of phenolic profiles and improvement of antioxidant capacities in jujube juice by select lactic acid bacteria. Food Chem 2020; 339:127859. [PMID: 32829244 DOI: 10.1016/j.foodchem.2020.127859] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [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: 04/22/2020] [Revised: 07/29/2020] [Accepted: 08/15/2020] [Indexed: 11/24/2022]
Abstract
The objective of this study was to investigate the effects of four commercial lactic acid bacteria (LAB), namely L. acidophilus, L. casei, L. helveticus and L. plantarum, on the phenolic profiles, antioxidant capacities and flavor profiles of jujube juices prepared from two crop varieties (Ziziphus Jujuba cv. Muzao and Hetian). Results showed that both jujube juices were excellent matrices for LAB growth with more than 11 log CFU/mL of viable counts at the end of fermentation. LAB fermentation dramatically increased total phenolic content, while decreased total flavonoid content of jujube juices. However, antioxidant capacities based on DPPH and FRAP methods were significantly improved by LAB fermentation and positively correlated with caffeic acid and rutin contents. Furthermore, a total of 74 volatile compounds were identified and increased in total content by LAB fermentation, which resulted in 22 and 19 new flavor volatiles formation in Muzao juice and Hetian juice, respectively.
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Affiliation(s)
- Tianlin Li
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
| | - Tian Jiang
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Ning Liu
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
| | - Caiyun Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
| | - Huaide Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
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25
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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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29
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Xiao Y, Liu Y, Wang Y, Jin Y, Guo X, Liu Y, Qi X, Lei H, Xu H. Heat-induced whey protein isolate gels improved by cellulose nanocrystals: Gelling properties and microstructure. Carbohydr Polym 2020; 231:115749. [DOI: 10.1016/j.carbpol.2019.115749] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 11/21/2019] [Accepted: 12/17/2019] [Indexed: 11/28/2022]
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Xiao Y, Liu Y, Wang X, Li M, Lei H, Xu H. Cellulose nanocrystals prepared from wheat bran: Characterization and cytotoxicity assessment. Int J Biol Macromol 2019; 140:225-233. [DOI: 10.1016/j.ijbiomac.2019.08.160] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 08/18/2019] [Accepted: 08/18/2019] [Indexed: 12/21/2022]
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Li T, Wu C, Liao J, Jiang T, Xu H, Lei H. Application of Protein Hydrolysates from Defatted Walnut Meal in High-Gravity Brewing to Improve Fermentation Performance of Lager Yeast. Appl Biochem Biotechnol 2019; 190:360-372. [PMID: 31352671 DOI: 10.1007/s12010-019-03109-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 07/18/2019] [Indexed: 11/25/2022]
Abstract
Protein hydrolysates were prepared from an industrially defatted walnut meal (DWMPH) by enzymolysis employing Neutrase, Protamex, and Flavorzyme, respectively, with/without ultrasonic treatment. The effects of DWMPH supplementations on fermentation performance of lager yeast in high-gravity brewing were investigated. Results showed that ultrasonic-assisted enzymolysis simultaneous treatment (UAE) and ultrasonic pretreatment followed by enzymolysis (UPE) significantly increased degree of hydrolysis (DH) by 1.43 times and 0.71 times of traditional enzymolysis (TE) at least, respectively, Protamex treatment exhibited higher DH (13.3-32.8%) than Neutrase (9.2-25.3%) or Flavorzyme (11.8-28.7%). Compared with control, DWMPH supplementations prepared by UAE using Protamex (UAE-P), Neutrase (UAE-N), or Flavorzyme (UAE-F) significantly improved fermentation performance of lager yeast, especially for UAE-P with the highest major fractions of Mw < 1 kDa, increased wort fermentability and ethanol production by 15% and 17%, respectively, while UAE-F with the highest major fractions of Mw > 3 kDa obviously improved the foam stability of final beers. Furthermore, DWMPH supplementations significantly increased yeast growth and cell viability, promoted glycogen and trehalose accumulation, upregulated stress markers HSP12 and SSA3 expression in yeast cells, improved the formation of higher alcohols and esters, and increased the ratio of higher alcohol to ester indicating a better balanced taste of final beers.
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Affiliation(s)
- Tianlin Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China
| | - Caiyun Wu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China
| | - Jianqiao Liao
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China
| | - Tian Jiang
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Huaide Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, China.
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Wen Q, Lei H, Huang J, Yu F, Huang L, Zhang J, Li D, Peng Y, Wen Z. FR4-based electromagnetic scanning micro-grating integrated with an angle sensor for a low-cost NIR micro-spectrometer. Appl Opt 2019; 58:4642-4646. [PMID: 31251283 DOI: 10.1364/ao.58.004642] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 05/16/2019] [Indexed: 06/09/2023]
Abstract
Aiming to implement a low-cost single-photodetector-based NIR micro-spectrometer, we present a novel flame retardant 4 (FR4)-driven micro-grating for spectral dispersion and spatial scanning. It consists of a silicon blazed grating directly bonded onto the FR4 actuator platform and an integrated differential electromagnetic angle sensor. Owing to the better shock and vibration reliability, larger aperture, shorter fabrication cycle, and much lower cost, it may be a potential alternative to conventional silicon microelectromechanical systems scanning micro-gratings. The micro-spectrometer prototype based on this device shows a spectral range of 800-1800 nm, a spectral accuracy of ±1.3 nm, and a 10 nm spectral resolution.
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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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Feng L, Wang X, Peng F, Liao J, Nai Y, Lei H, Li M, Xu H. Walnut Protein Hydrolysates Play a Protective Role on Neurotoxicity Induced by d-Galactose and Aluminum Chloride in Mice. Molecules 2018; 23:E2308. [PMID: 30201912 PMCID: PMC6225279 DOI: 10.3390/molecules23092308] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 09/04/2018] [Accepted: 09/07/2018] [Indexed: 11/28/2022] Open
Abstract
In recent years, with an increase in the aging population, neurodegenerative diseases have attracted more and more attention. This study aimed to investigate the potential neuroprotective effect of defatted walnut meal protein hydrolysates (DWMPH) on neurotoxicity induced by d-galactose (d-gal) and aluminum chloride (AlCl₃) in mice. The animal models were established by combining treatments with d-gal (200 mg/kg/day, subcutaneously) and AlCl₃ (100 mg/kg in drinking water) for 90 days. During the 90 days, 1 g/kg of DWMPH was administrated orally every day. The results indicated that DWMPH treatment alleviated oxidative stress, reversed cholinergic dysfunction, and suppressed the release of proinflammatory cytokines in the brains of d-gal + AlCl₃-treated mice, and thus improving the learning and memory functions of these mice, which was closely correlated with the strong antioxidant activity of DWMPH. This finding suggests that DWMPH might be a promising dietary supplement in improving neuronal dysfunctions of the brain.
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Affiliation(s)
- Li Feng
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
| | - Xiaojing Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
| | - Fei Peng
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
| | - Jianqiao Liao
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
| | - Yifan Nai
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
| | - Hongjie Lei
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
| | - Mei Li
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
| | - Huaide Xu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China.
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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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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 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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43
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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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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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47
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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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48
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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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49
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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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50
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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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