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Sá-Caputo DC, Taiar R, Boyer FC, Rapin A, Bernardo-Filho M. Editorial: The physiological effects of vibration therapy in health and disease. Front Physiol 2024; 15:1381145. [PMID: 38476147 PMCID: PMC10927962 DOI: 10.3389/fphys.2024.1381145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 02/09/2024] [Indexed: 03/14/2024] Open
Affiliation(s)
- Danubia Cunha Sá-Caputo
- Laboratório de Vibrações Mecânicas e Práticas Integrativas, Departamento de Biofísica e Biometria, Instituto de Biologia Roberto Alcantara Gomes and Policlínica Universitária Piquet Carneiro, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Redha Taiar
- MATIM, Université de Reims Champagne-Ardenne, Reims, France
| | | | - Amandine Rapin
- Faculté de Médecine, Université de Reims Champagne Ardennes, Reims, France
| | - Mario Bernardo-Filho
- Laboratório de Vibrações Mecânicas e Práticas Integrativas, Departamento de Biofísica e Biometria, Instituto de Biologia Roberto Alcantara Gomes and Policlínica Universitária Piquet Carneiro, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
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Cai JY, Strodl E, Yang WK, Yin XN, Wen GM, Sun DL, Xian DX, Zhao YF, Chen WQ. Critical window for the association between early electronic screen exposure and hyperactive behaviors in preschool children. PSYCHOL HEALTH MED 2023; 28:2108-2120. [PMID: 36927338 DOI: 10.1080/13548506.2023.2192039] [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: 07/22/2022] [Accepted: 03/09/2023] [Indexed: 03/18/2023]
Abstract
Electronic screens have become an integral part of modern life, accompanied with growing concerns for children's neuropsychological development. This study aimed to evaluate the associations between measures of early life screen exposure and hyperactive behaviors among preschool children. The study also aimed to investigate their cumulative effects and the critical window for these associations. A cross-sectional survey was conducted among 52 625 mother-child dyads at preschools in LongHua District of Shenzhen, China. A self-administered structured questionnaire was used to assess socio-demographic characteristics, duration of children's electronic screen exposure in each of the first 3 years following birth and the presence of current hyperactive behaviors. A series of logistic regression models were used to examine the relationship between previous screen time and current hyperactive behaviors. A crossover analysis was used to explore the critical window for a significant relationship between screen time and hyperactive behaviors. We found that exposure to electronic screens in the first 3 years of life was associated with hyperactive behaviors in preschool children. A cumulative effect was shown in children with an average daily screen time less than 60 min, with adjusted ORs increasing from 1.262 to 1.989 as screen exposure years increased from 1 to 3 years. A critical window was identified in that children in the first 2 years after birth were vulnerable to electronic screen exposure. Exposure to televisions, mobile phones, and computers were all related to elevated risks for hyperactive behaviors. In conclusion, early screen exposure appears to increase the risk for hyperactive behaviors in preschool children with the presence of a cumulative effect, a critical window and different electronic screens having similar effects.
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Affiliation(s)
- Jia-Yu Cai
- Department of Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Esben Strodl
- School of Psychology and Counselling, Queensland University of Technology, Brisbane, QLD, Australia
| | - Wei-Kang Yang
- Department of Child Healthcare, Women's and Children's Hospital of Longhua District of Shenzhen, Shenzhen, China
| | - Xiao-Na Yin
- Department of Child Healthcare, Women's and Children's Hospital of Longhua District of Shenzhen, Shenzhen, China
| | - Guo-Min Wen
- Department of Child Healthcare, Women's and Children's Hospital of Longhua District of Shenzhen, Shenzhen, China
| | - Deng-Li Sun
- Department of Child Healthcare, Women's and Children's Hospital of Longhua District of Shenzhen, Shenzhen, China
| | - Dan-Xia Xian
- Department of Child Healthcare, Women's and Children's Hospital of Longhua District of Shenzhen, Shenzhen, China
| | - Ya-Fen Zhao
- Department of Child Healthcare, Women's and Children's Hospital of Longhua District of Shenzhen, Shenzhen, China
| | - Wei-Qing Chen
- Department of Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China
- School of Health Management, Xinhua College of Guangzhou, Guangzhou, China
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Xu C, Chen B, Pan J, Zhou X, Xu Z, Wang H. Mortality and Cumulative Kidney Score are Associated with Transient and Persistent Acute Kidney Injury in Septic Patients: A Retrospective Study Based on MIMIC-IV. ARCH ESP UROL 2023; 76:245-254. [PMID: 37455523 DOI: 10.56434/j.arch.esp.urol.20237604.28] [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] [Indexed: 07/18/2023]
Abstract
BACKGROUND Acute kidney injury (AKI) is frequently caused by sepsis. Recently, the Acute Disease Quality Initiative (ADQI) workgroup further classified AKI as transient or persistent. Oliguria and increased serum creatinine represent two different kinds of renal impairment. The aim of the study was to assess mortality and cumulative AKI score associated with transient and persistent AKI in septic patients. METHODS Septic patients were stratified according to the presence and AKI development (considered persistent when remaining >48 h) were included. An adjusted logistic regression model was used to determine hospital mortality. In addition, we calculated an AKI score by combining both Kidney Disease: Improving Global Outcomes (KDIGO) criteria of urine output and creatinine AKI stages. The relationship between the cumulative AKI score and persistent AKI was further examined using the logistic regression model and receiver operating characteristic (ROC) curve analysis. RESULTS 12928 septic patients were enrolled in the study. AKI occurred in 73.7% of septic patients, in 39.5% was transient and in 60.5% was persistent. Patients with persistent AKI had higher severity scores and more severe renal dysfunction upon admission. Persistent AKI, but not transient AKI, was associated with increased intensive care units (ICUs) and hospital mortality. Then we found that the cumulative AKI score was associated with an increased risk of persistent AKI. This association was consistent across three original KDIGO severity stages and subgroup analyses. CONCLUSIONS It was found that persistent AKI was independently associated with mortality in septic patients. Furthermore, serum creatinine and urine output criteria had cumulative effects on KDIGO AKI staging and provided more information about the relationship between AKI and outcomes.
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Affiliation(s)
- Chang Xu
- Department of Intensive Care Medicine, Hwa Mei Hospital, University of Chinese Academy of Sciences (Ningbo No. 2 Hospital), 315000 Ningbo, Zhejiang, China
| | - Bixin Chen
- Department of Intensive Care Medicine, Hwa Mei Hospital, University of Chinese Academy of Sciences (Ningbo No. 2 Hospital), 315000 Ningbo, Zhejiang, China
| | - Jianneng Pan
- Department of Intensive Care Medicine, Hwa Mei Hospital, University of Chinese Academy of Sciences (Ningbo No. 2 Hospital), 315000 Ningbo, Zhejiang, China
| | - Xiaoyang Zhou
- Department of Intensive Care Medicine, Hwa Mei Hospital, University of Chinese Academy of Sciences (Ningbo No. 2 Hospital), 315000 Ningbo, Zhejiang, China
| | - Zhaojun Xu
- Department of Intensive Care Medicine, Hwa Mei Hospital, University of Chinese Academy of Sciences (Ningbo No. 2 Hospital), 315000 Ningbo, Zhejiang, China
| | - Hua Wang
- Department of Intensive Care Medicine, Hwa Mei Hospital, University of Chinese Academy of Sciences (Ningbo No. 2 Hospital), 315000 Ningbo, Zhejiang, China
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4
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Xu W, Zhao H, Gao L, Guo L, Liu J, Li H, Sun J, Xing A, Chen S, Wu S, Wu Y. Association of long-term triglyceride-glucose index level and change with the risk of cardiometabolic diseases. Front Endocrinol (Lausanne) 2023; 14:1148203. [PMID: 37065738 PMCID: PMC10098344 DOI: 10.3389/fendo.2023.1148203] [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: 01/19/2023] [Accepted: 03/16/2023] [Indexed: 04/03/2023] Open
Abstract
OBJECTIVE The triglyceride-glucose (TyG) index is considered as a pivotal factor for various metabolic, cardiovascular, and cerebrovascular diseases. However, there is currently a paucity of relevant studies on the association between long-term level and change of TyG-index and cardiometabolic diseases (CMDs) risk. We aimed to explore the risk of CMDs in relation to the long-term level and change of TyG-index. METHODS Based on the prospective cohort study, a total of 36359 subjects who were free of CMDs, had complete data of triglyceride (TG) and fasting blood glucose (FBG) and underwent four health check-ups from 2006 to 2012 consecutively were followed up for CMDs until 2021. The associations between long-term level and change of TyG-index and CMDs risk were assessed by Cox proportional hazards regression models to compute hazard ratios (HRs) and 95% confidence intervals (CIs). The TyG-index was calculated as ln [TG, mg/dL) × FBG, mg/dL)/2]. RESULTS During the median observation period of 8 years, 4685 subjects were newly diagnosed with CMDs. In multivariable-adjusted models, a graded positive association was observed between CMDs and long-term TyG-index. Compared with the Q1 group, subjects with the Q2-Q4 group had increased progressively risk of CMDs, with corresponding HRs of 1.64(1.47-1.83), 2.36(2.13-2.62), 3.15(2.84-3.49), respectively. The association was marginally attenuated, after further adjustment for the baseline TyG level. In addition, compared with stable TyG level, both loss and gain in TyG level were associated with increased CMDs risk. CONCLUSIONS Long-term elevated level and change of TyG-index are risk factors for the incident CMDs. Elevated TyG-index in the early stage remains to exert cumulative effects on the occurrence of CMDs even after accounting for the baseline TyG-index.
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Affiliation(s)
- Wenqi Xu
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
- Graduate School, North China University of Science and Technology, Tangshan, Hebei, China
| | - Haiyan Zhao
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
| | - Lishu Gao
- Department of Endocrinology, Tangshan People's Hospital, Tangshan, Hebei, China
| | - Lu Guo
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
- Graduate School, North China University of Science and Technology, Tangshan, Hebei, China
| | - Jianrong Liu
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
| | - Haixia Li
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
| | - Junyan Sun
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
| | - Aijun Xing
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
| | - Shuohua Chen
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
| | - Shouling Wu
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
| | - Yuntao Wu
- Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei, China
- *Correspondence: Yuntao Wu,
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5
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Pavel AG, Stambouli D, Anton G, Gener I, Preda A, Baston C, Gingu C. Cumulative Effect Assessment of Common Genetic Variants on Prostate Cancer: Preliminary Studies. Biomedicines 2022; 10:biomedicines10112733. [PMID: 36359253 PMCID: PMC9687438 DOI: 10.3390/biomedicines10112733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/19/2022] [Accepted: 10/24/2022] [Indexed: 12/24/2022] Open
Abstract
Single nucleotide polymorphisms (SNPs) are the most common type of genetic variation among people. Genome Wide Association studies (GWASs) have generated multiple genetic variants associated with prostate cancer (PC) risk. Taking into account previously identified genetic susceptibility variants, the purpose of our study was to determine the cumulative association between four common SNPs and the overall PC risk. A total of 78 specimens from both PC and benign prostate hyperplasia (BPH) patients were included in the study. Genotyping of all selected SNPs was performed using the TaqMan assay. The association between each SNP and the PC risk was assessed individually and collectively. Analysis of the association between individual SNPs and PC risk revealed that only the rs4054823 polymorphism was significantly associated with PC, and not with BPH (p < 0.001). Statistical analysis also showed that the heterozygous genotype of the rs2735839 polymorphism is more common within the BPH group than in the PC group (p = 0.042). The cumulative effect of high-risk alleles on PC was analyzed using a logistic regression model. As a result, the carriers of at least one risk allele copy in each particular region had a cumulative odd ratio (OR) of 1.42 times, compared to subjects who did not have any of these factors. In addition, the combination of these four genetic variants increased the overall risk of PC by 52%. Our study provides further evidence of the cumulative effects of genetic risk factors on overall PC risk. These results should encourage future research to explain the interactions between known susceptibility variants and their contribution to the development and progression of PC disease.
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Affiliation(s)
- Anca Gabriela Pavel
- Cytogenomic Medical Laboratory, Molecular Genetics Department, 014453 Bucharest, Romania
- The Romania Academy, “Stefan S. Nicolau” Institute of Virology, 030304 Bucharest, Romania
- Correspondence:
| | - Danae Stambouli
- Cytogenomic Medical Laboratory, Molecular Genetics Department, 014453 Bucharest, Romania
| | - Gabriela Anton
- The Romania Academy, “Stefan S. Nicolau” Institute of Virology, 030304 Bucharest, Romania
| | - Ismail Gener
- Department of Nephrology, Urology, Immunology and Immunology of Transplant, Dermatology, Allergology, Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy, 010751 Bucharest, Romania
- Department of Nephrology, Fundeni Clinical Institute, 022328 Bucharest, Romania
| | - Adrian Preda
- Center of Urological Surgery, Dialysis and Renal Transplantation, Fundeni Clinical Institute, 022328 Bucharest, Romania
| | - Catalin Baston
- Department of Nephrology, Urology, Immunology and Immunology of Transplant, Dermatology, Allergology, Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy, 010751 Bucharest, Romania
- Center of Urological Surgery, Dialysis and Renal Transplantation, Fundeni Clinical Institute, 022328 Bucharest, Romania
| | - Constantin Gingu
- Department of Nephrology, Urology, Immunology and Immunology of Transplant, Dermatology, Allergology, Faculty of Medicine, “Carol Davila” University of Medicine and Pharmacy, 010751 Bucharest, Romania
- Center of Urological Surgery, Dialysis and Renal Transplantation, Fundeni Clinical Institute, 022328 Bucharest, Romania
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6
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Zhang Z, Ju W, Zhou Y, Li X. Revisiting the cumulative effects of drought on global gross primary productivity based on new long-term series data (1982-2018). Glob Chang Biol 2022; 28:3620-3635. [PMID: 35343026 DOI: 10.1111/gcb.16178] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 03/05/2022] [Accepted: 03/05/2022] [Indexed: 06/14/2023]
Abstract
Drought has broad and deep impacts on vegetation. Studies on the effects of drought on vegetation have been conducted over years. Recently, the cumulative effect of drought is recognized as another key factor affecting plant growth. However, global-scale studies on this phenomenon are still lacking. Thus, based on new satellite based gross primary productivity (GPP) and multi-temporal scale Standardized Precipitation Evapotranspiration Index data sets, we explored the cumulative effect duration (CED) of drought on global vegetation GPP and analyzed its variability across elevations and climatic zones. The main findings were as follows: (1) The cumulative effect of drought on GPP was widespread, with an average CED of 4.89 months. (2) CED of drought on GPP varied among vegetation types. Specifically, grasslands showed the longest duration, with an average value of 5.28 months, followed by shrublands (5.09 months), wetlands (5.03 months), croplands (4.85 months), savannas (4.58 months), and forestlands (4.57 months). (3) CED of drought on GPP changes with climate conditions. It decreased with the decrease of precipitation in the driest month (Pdry ) and mean annual precipitation in tropical and arid climate zones, respectively. In both temperate and cold climate zones, CED of drought on GPP was shorter in areas with dry winter than that in areas with dry summer. It increased with the decrease of mean annual air temperature in tropical climate zones and decreased with the increase of summer temperature in temperate and cold climatic zones. (4) With increasing elevation, CED of drought on GPP showed a pattern of increasing (0-3000 m), then decreasing (3000-5000 m), and increasing again (>5000 m). Our findings highlight the heterogeneity of CED of drought on GPP, owing to differences in vegetation types, long-term hydrothermal conditions, elevation, etc. The results could deepen our understanding of the effects of drought on global vegetation.
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Affiliation(s)
- Zhenyu Zhang
- International Institute of Earth System Science, Nanjing University, Nanjing, China
- School of Geography and Ocean Science, Nanjing University, Nanjing, China
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, Zhejiang, China
| | - Weimin Ju
- International Institute of Earth System Science, Nanjing University, Nanjing, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China
| | - Yanlian Zhou
- School of Geography and Ocean Science, Nanjing University, Nanjing, China
| | - Xiaoyu Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, Zhejiang, China
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7
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Ma J, Wang S, Zhu X, Sun G, Chang G, Li L, Hu X, Zhang S, Zhou Y, Song CP, Huang J. Major episodes of horizontal gene transfer drove the evolution of land plants. Mol Plant 2022; 15:857-871. [PMID: 35235827 DOI: 10.1016/j.molp.2022.02.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 12/10/2021] [Accepted: 01/26/2022] [Indexed: 06/14/2023]
Abstract
How horizontal gene transfer (HGT) has contributed to the evolution of animals and plants remains a major puzzle. Despite recent progress, defining the overall scale and pattern of HGT events in land plants has been largely elusive. In this study, we performed systematic analyses for acquired genes in different plant groups and throughout land plant evolution. We found that relatively recent HGT events occurred in charophytes and all major land plant groups, but their frequency declined rapidly in seed plants. Two major episodes of HGT events occurred in land plant evolution, corresponding to the early evolution of streptophytes and the origin of land plants, respectively. Importantly, a vast majority of the genes acquired in the two episodes have been retained in descendant groups, affecting numerous activities and processes of land plants. We analyzed some of the acquired genes involved in stress responses, ion and metabolite transport, growth and development, and specialized metabolism, and further assessed the cumulative effects of HGT in land plants.
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Affiliation(s)
- Jianchao Ma
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Shuanghua Wang
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Yunnan Key Laboratory for Fungal Diversity and Green Development, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Xiaojing Zhu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Guiling Sun
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Guanxiao Chang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Linhong Li
- Department of Entomology, China Agricultural University, Beijing 100193, China
| | - Xiangyang Hu
- Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai 200444, China
| | - Shouzhou Zhang
- Fairy Lake Botanical Garden, Shenzhen & Chinese Academy of Sciences, Shenzhen 518004, China
| | - Yun Zhou
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Chun-Peng Song
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China.
| | - Jinling Huang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China; Key Laboratory for Plant Diversity and Biogeography of East Asia, Yunnan Key Laboratory for Fungal Diversity and Green Development, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; Department of Biology, East Carolina University, Greenville, NC 27858, USA.
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8
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Wang XT, Wang DJ, Li HB, Tai Y, Jiang C, Liu F, Li SY, Miao BL. [ Cumulative effects of K-function in the research of point patterns]. Ying Yong Sheng Tai Xue Bao 2022; 33:1275-1282. [PMID: 35730086 DOI: 10.13287/j.1001-9332.202205.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The spatial pattern of plant population is one of primary issues in ecological research. Point pattern analy-sis is considered as an important method to study the spatial pattern of plant population. Ripley's K function has been commonly used for point pattern analysis. However, the cumulative effect of Ripley's K function may lead to specific spatial pattern charcteristics. To explore how the cumulative effect of Ripley's K function affects population pattern, the data of clumped distribution, random distribution and regular distribution of Stipa grandis were simulated by R software. All data generated by R software were analyzed by Ripley's K function and the non-cumulative pairwise correlation function g(r). The results showed that for clumped distribution (or regular distribution), the cumulative effect of Ripley's K function was manifested in two aspects. On the one hand, the scale of clumped distribution (or regular distribution) was increased due to Ripley's K function. On the other hand, Ripley's K function could detect the difference of the distribution of cluster (or negative interaction range) in the sampling space, exhibiting different pattern characteristics. For random distribution, Ripley's K function had no cumulative effect. In conclusion, the combination of Ripley's K function and pairwise correlation function by collecting replicate samples could better reveal the essential characteristics of the pattern in the study of population pattern.
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Affiliation(s)
- Xin-Ting Wang
- School of Energy and Power Engineering, Inner Mongolia University of Technology/Key Laboratory of Environmental Pollution Control and Remediation at Universities of Inner Mongolia Autonomous Region, Hohhot 010051, China
| | - Dian-Jie Wang
- School of Energy and Power Engineering, Inner Mongolia University of Technology/Key Laboratory of Environmental Pollution Control and Remediation at Universities of Inner Mongolia Autonomous Region, Hohhot 010051, China
| | - Hai-Bing Li
- Inner Mongolia Research Academy of Ecological and Environmental Sciences, Hohhot 010011, China
| | - Yang Tai
- Inner Mongolia Sunture Environmental Technology Co., Ltd, Hohhot 010010, China
| | - Chao Jiang
- Institute of Grassland Research, Chinese Academy of Agriculture Sciences, Hohhot 010010, China
| | - Fang Liu
- School of Energy and Power Engineering, Inner Mongolia University of Technology/Key Laboratory of Environmental Pollution Control and Remediation at Universities of Inner Mongolia Autonomous Region, Hohhot 010051, China
| | - Su-Ying Li
- School of Energy and Power Engineering, Inner Mongolia University of Technology/Key Laboratory of Environmental Pollution Control and Remediation at Universities of Inner Mongolia Autonomous Region, Hohhot 010051, China
| | - Bai-Ling Miao
- Inner Mongolia Meteorological Institute, Hohhot 010051, China
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9
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Li X, Chang CCH, Donohue JM, Krafty RT. A competing risks regression model for the association between time-varying opioid exposure and risk of overdose. Stat Methods Med Res 2022; 31:1013-1030. [PMID: 35138206 DOI: 10.1177/09622802221075933] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In the opioid research, predicting the risk of overdose or other adverse outcomes from opioid prescription patterns can help health professionals identify high-risk individuals. Challenges may arise in modeling the exposure-time-response association if the intensity, duration, and timing of exposure vary among subjects, and if exposures have a cumulative or latency effect on the risk. Further challenges may arise when the data involve competing risks, where subjects may fail from one of multiple events and failure from one precludes the risk of experiencing others. In this study, we proposed a competing risks regression model via subdistribution hazards to directly estimate the association between longitudinal patterns of opioid exposure and cumulative incidence of opioid overdose. The model incorporated weighted cumulative effects of the exposure and used penalized splines in the partial likelihood equation to estimate the weights flexibly. The proposed model is able to distinguish different opioid prescription patterns even though these patterns have the same overall intensity during the study period. Performance of the model was evaluated through simulation.
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Affiliation(s)
| | - Chung-Chou H Chang
- Department of Biostatistics, 6614University of Pittsburgh, Pittsburgh, PA.,Department of Medicine, 6614University of Pittsburgh, Pittsburgh, PA
| | - Julie M Donohue
- Department of Health policy and Management, 6614University of Pittsburgh, Pittsburgh, PA
| | - Robert T Krafty
- Department of Biostatistics and Bioinformatics, 1371Emory University, Atlanta, GA
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10
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Ming X, Lou Y, Zou L, Lei Y, Li H, Li Y. The cumulative effect of positive and negative feedback on emotional experience. Psychophysiology 2021; 58:e13935. [PMID: 34459511 DOI: 10.1111/psyp.13935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 07/13/2021] [Accepted: 08/09/2021] [Indexed: 11/29/2022]
Abstract
The cumulative effect of positive or negative feedback on subsequent emotional experiences remains unclear. Elucidating this effect could help individuals to better understand and accept the change in emotional experience, irrespective of when they or others receive consecutive positive or negative feedback. This study aimed to examine this effect on 37 participants using self-reported pleasantness and event-related potential data as indicators. After completing each trial, the participants received predetermined false feedback; they were then assessed on a nine-point pleasantness scale. There were 12 false feedback conditions categorized into three valence types. The positive type consisted of three consecutive positive feedbacks and a fourth medium feedback; the medium type contained four consecutive medium feedbacks; the negative type consisted of three consecutive negative feedbacks and a fourth medium feedback. We abbreviated medium false feedback after three positive, medium, and negative false feedbacks as 3 pm, 3 mm, and 3 nm, respectively. The results showed that the score of self-reported pleasantness of 3mm was significantly lower than that of 3 pm and higher than that of 3 nm. The feedback-related negativity amplitude of 3 pm was significantly greater than that of 3 mm and 3 nm, and the late-positive potential amplitude of 3 nm was significantly greater than that of 3 pm and 3 mm. We found that individuals experienced medium feedback more positively and negatively after continuous positive and negative feedback, respectively. Our findings suggest that individuals should seek continuous positive feedback and avoid continuous negative feedback; this strategy may contribute to increased positive emotional experiences in the future.
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Affiliation(s)
- Xianchao Ming
- Institute of Brain and Psychological Sciences, Sichuan Normal University, Chengdu, China.,School of Psychology, South China Normal University, Guangzhou, China
| | - Yixue Lou
- Institute of Brain and Psychological Sciences, Sichuan Normal University, Chengdu, China.,Department of Psychology, Faculty of Education and Psychology, University of Jyväskylä, Jyväskylä, Finland
| | - Liye Zou
- Exercise and Mental Health Laboratory, School of Psychology, Shenzhen University, Shenzhen, China
| | - Yi Lei
- Institute of Brain and Psychological Sciences, Sichuan Normal University, Chengdu, China.,Center for Language and Brain, Shenzhen Institute of Neuroscience, Shenzhen, China
| | - Hong Li
- Institute of Brain and Psychological Sciences, Sichuan Normal University, Chengdu, China.,School of Psychology, South China Normal University, Guangzhou, China.,Center for Language and Brain, Shenzhen Institute of Neuroscience, Shenzhen, China
| | - Yang Li
- School of Psychology, Chengdu Medical College, Chengdu, China
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11
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Wu L, Xie X, Li Y, Liang T, Zhong H, Ma J, Yang L, Yang J, Li L, Xi Y, Li H, Zhang J, Chen X, Ding Y, Wu Q. Metagenomics-Based Analysis of the Age-Related Cumulative Effect of Antibiotic Resistance Genes in Gut Microbiota. Antibiotics (Basel) 2021; 10:antibiotics10081006. [PMID: 34439056 PMCID: PMC8388928 DOI: 10.3390/antibiotics10081006] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/10/2021] [Accepted: 08/13/2021] [Indexed: 12/21/2022] Open
Abstract
Antibiotic resistance in bacteria has become a major global health problem. One of the main reservoirs of antibiotic resistance genes is the human gut microbiota. To characterise these genes, a metagenomic approach was used. In this study, a comprehensive antibiotic resistome catalog was established using fecal samples from 246 healthy individuals from world’s longevity township in Jiaoling, China. In total, 606 antibiotic resistance genes were detected. Our results indicated that antibiotic resistance genes in the human gut microbiota accumulate and become more complex with age as older groups harbour the highest abundance of these genes. Tetracycline resistance gene type tetQ was the most abundant group of antibiotic resistance genes in gut microbiota, and the main carrier of antibiotic resistance genes was Bacteroides. Antibiotic efflux, inactivation, and target alteration were found to be the dominant antimicrobial resistance mechanisms. This research may help to establish a comprehensive antibiotic resistance catalog that includes extremely long-lived healthy people such as centenarians, and may provide potential recommendations for controlling the use of antibiotics.
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Affiliation(s)
- Lei Wu
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (L.W.); (T.L.); (J.M.); (J.Y.); (X.C.)
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Xinqiang Xie
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Ying Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Tingting Liang
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (L.W.); (T.L.); (J.M.); (J.Y.); (X.C.)
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Haojie Zhong
- The First Affiliated Hospital, School of Clinical Medicine of Guangdong Pharmaceutical University, Guangzhou 510080, China;
| | - Jun Ma
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (L.W.); (T.L.); (J.M.); (J.Y.); (X.C.)
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Lingshuang Yang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Juan Yang
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (L.W.); (T.L.); (J.M.); (J.Y.); (X.C.)
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Longyan Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Yu Xi
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Haixin Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Jumei Zhang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
| | - Xuefeng Chen
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China; (L.W.); (T.L.); (J.M.); (J.Y.); (X.C.)
| | - Yu Ding
- Department of Food Science and Technology, Institute of Food Safety and Nutrition, Jinan University, Guangzhou 510632, China
- Correspondence: (Y.D.); (Q.W.); Tel.: +86-020-87688132 (Q.W.)
| | - Qingping Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China; (X.X.); (Y.L.); (L.Y.); (L.L.); (Y.X.); (H.L.); (J.Z.)
- Correspondence: (Y.D.); (Q.W.); Tel.: +86-020-87688132 (Q.W.)
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12
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Chen X, Zhang S, Huang G, Xu Y, Li Q, Shi J, Li W, Wang W, Guo L, Lu C. Associations Between Child Maltreatment and Depressive Symptoms Among Chinese College Students: An Analysis of Sex Differences. Front Psychiatry 2021; 12:656646. [PMID: 34305672 PMCID: PMC8298832 DOI: 10.3389/fpsyt.2021.656646] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 05/28/2021] [Indexed: 12/27/2022] Open
Abstract
Background: Depressive symptoms and child maltreatment are both global public health problems among young adults. This study aimed to investigate the associations between five types of child maltreatment and depressive symptoms among Chinese college students, with a focus on potential sex differences. Methods: A cross-sectional study of a nationally representative sample of Chinese college students was conducted from March to June 2019 with a multistage, stratified cluster, random sampling method. In total, 30,179 college students from 60 colleges of 10 Chinese province-level regions completed standard questionnaires, including a history of child maltreatment and current depressive symptoms. Results: The prevalence of depressive symptoms among college students in China was 7.3%. After adjusting for control variables, physical abuse (adjusted odds ratio [aOR] = 1.20, 95% confidence interval [CI] = 1.17-1.23), emotional abuse (aOR = 1.21, 95% CI = 1.19-1.23), sexual abuse (aOR = 1.19, 95% CI = 1.16-1.22), physical neglect (aOR = 1.14, 95% CI = 1.12-1.16) and emotional neglect (aOR = 1.08, 95% CI = 1.07-1.09) were all positively associated with depressive symptoms. Notably, a cumulative effect of child maltreatment on depressive symptoms among Chinese college students was observed. Moreover, sex differences in the associations of emotional abuse, emotional neglect, and the number of maltreatment types with depressive symptoms were statistically significant (P < 0.05). Further stratification analyses showed that female students who experienced emotional abuse and emotional neglect had a higher risk of depressive symptoms than male students, and the cumulative effect of maltreatment types was stronger for females than males. Conclusion: Five types of child maltreatment and their co-occurrence were associated with an increased risk of depressive symptoms among college students. Furthermore, the effects of emotional abuse, emotional neglect and the number of maltreatment types on depressive symptoms were stronger for females than for males. These findings can promote understanding of the effects of child maltreatment on depressive symptoms, and prevention and intervention strategies for depressive symptoms should consider the type of child maltreatment and sex differences.
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Affiliation(s)
- Xiaoliang Chen
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China.,Guangdong Engineering Technology Research Center of Nutrition Translation, Guangzhou, China
| | - Sheng Zhang
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China.,Guangdong Engineering Technology Research Center of Nutrition Translation, Guangzhou, China
| | - Guoliang Huang
- Center for ADR (Adverse Drug Reaction) Monitoring of Guangdong, Guangzhou, China
| | - Yan Xu
- Center for ADR (Adverse Drug Reaction) Monitoring of Guangdong, Guangzhou, China
| | - Qian Li
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China.,Guangdong Engineering Technology Research Center of Nutrition Translation, Guangzhou, China
| | - Jingman Shi
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China.,Guangdong Engineering Technology Research Center of Nutrition Translation, Guangzhou, China
| | - Wenyan Li
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China.,Guangdong Engineering Technology Research Center of Nutrition Translation, Guangzhou, China
| | - Wanxin Wang
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China.,Guangdong Engineering Technology Research Center of Nutrition Translation, Guangzhou, China
| | - Lan Guo
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China.,Guangdong Engineering Technology Research Center of Nutrition Translation, Guangzhou, China
| | - Ciyong Lu
- Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, China.,Guangdong Engineering Technology Research Center of Nutrition Translation, Guangzhou, China
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13
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Cheng CF, Lin YJ, Lin MC, Liang WM, Chen CC, Chen CH, Wu JY, Lin TH, Liao CC, Huang SM, Hsieh AR, Tsai FJ. Genetic risk score constructed from common genetic variants is associated with cardiovascular disease risk in type 2 diabetes mellitus. J Gene Med 2020; 23:e3305. [PMID: 33350037 DOI: 10.1002/jgm.3305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/21/2020] [Accepted: 12/08/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Patients with type 2 diabetes mellitus (T2DM) experience a two-fold increased risk of cardiovascular diseases. Genome-wide association studies (GWAS) have identified T2DM susceptibility genetic variants. Interestingly, the genetic variants associated with cardiovascular disease risk in T2DM Han Chinese remain to be elucidated. The present study aimed to investigate the genetic variants associated with cardiovascular disease risk in T2DM. METHODS We performed bootstrapping, GWAS and an investigation of genetic variants associated with cardiovascular disease risk in a discovery T2DM cohort and in a replication cohort. The discovery cohort included 326 cardiovascular disease patients and 1209 noncardiovascular disease patients. The replication cohort included 68 cardiovascular disease patients and 317 noncardiovascular disease patients. The main outcome measures were genetic variants for genetic risk score (GRS) in cardiovascular disease risk in T2DM. RESULTS In total, 35 genetic variants were associated with cardiovascular disease risk. A GRS was generated by combining risk alleles from these variants weighted by their estimated effect sizes (log odds ratio [OR]). T2DM patients with weighted GRS ≥ 12.63 had an approximately 15-fold increase in cardiovascular disease risk (odds ratio = 15.67, 95% confidence interval [CI] = 10.33-24.00) compared to patients with weighted GRS < 10.39. With the addition of weighted GRS, receiver-operating characteristic curves showed that area under the curve with conventional risk factors was improved from 0.719 (95% CI = 0.689-0.750) to 0.888 (95% CI = 0.866-0.910). CONCLUSIONS These 35 genetic variants are associated with cardiovascular disease risk in T2DM, alone and cumulatively. T2DM patients with higher levels of weighted genetic risk score have higher cardiovascular disease risks.
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Affiliation(s)
- Chi-Fung Cheng
- Graduate Institute of Biostatistics, School of Public Health, China Medical University, Taichung, Taiwan.,Genetic Center, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Ying-Ju Lin
- Genetic Center, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.,School of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Mei-Chen Lin
- Graduate Institute of Biostatistics, School of Public Health, China Medical University, Taichung, Taiwan
| | - Wen-Miin Liang
- Graduate Institute of Biostatistics, School of Public Health, China Medical University, Taichung, Taiwan
| | - Ching-Chu Chen
- Division of Endocrinology and Metabolism, Department of Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Chien-Hsiun Chen
- School of Chinese Medicine, China Medical University, Taichung, Taiwan.,Institute of Biomedical Sciences, Taipei, Taiwan
| | - Jer-Yuarn Wu
- School of Chinese Medicine, China Medical University, Taichung, Taiwan.,Institute of Biomedical Sciences, Taipei, Taiwan
| | - Ting-Hsu Lin
- Genetic Center, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Chiu-Chu Liao
- Genetic Center, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Shao-Mei Huang
- Genetic Center, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Ai-Ru Hsieh
- Department of Statistics, Tamkang University, New Taipei, Taiwan
| | - Fuu-Jen Tsai
- Genetic Center, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.,School of Chinese Medicine, China Medical University, Taichung, Taiwan.,Department of Biotechnology and Bioinformatics, Asia University, Taichung, Taiwan
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14
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Zhao Y, Zheng S, Beitel-White N, Liu H, Yao C, Davalos RV. Development of a Multi-Pulse Conductivity Model for Liver Tissue Treated With Pulsed Electric Fields. Front Bioeng Biotechnol 2020; 8:396. [PMID: 32509742 PMCID: PMC7248411 DOI: 10.3389/fbioe.2020.00396] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 04/08/2020] [Indexed: 12/18/2022] Open
Abstract
Pulsed electric field treatment modalities typically utilize multiple pulses to permeabilize biological tissue. This electroporation process induces conductivity changes in the tissue, which are indicative of the extent of electroporation. In this study, we characterized the electroporation-induced conductivity changes using all treatment pulses instead of solely the first pulse as in conventional conductivity models. Rabbit liver tissue was employed to study the tissue conductivity changes caused by multiple, 100 μs pulses delivered through flat plate electrodes. Voltage and current data were recorded during treatment and used to calculate the tissue conductivity during the entire pulsing process. Temperature data were also recorded to quantify the contribution of Joule heating to the conductivity according to the tissue temperature coefficient. By fitting all these data to a modified Heaviside function, where the two turning points (E0, E1) and the increase factor (A) are the main parameters, we calculated the conductivity as a function of the electric field (E), where the parameters of the Heaviside function (A and E0) were functions of pulse number (N). With the resulting multi-factor conductivity model, a numerical electroporation simulation can predict the electrical current for multiple pulses more accurately than existing conductivity models. Moreover, the saturating behavior caused by electroporation can be explained by the saturation trends of the increase factor A in this model. The conductivity change induced by electroporation has a significant increase at about the first 30 pulses, then tends to saturate at 0.465 S/m. The proposed conductivity model can simulate the electroporation process more accurately than the conventional conductivity model. The electric field distribution computed using this model is essential for treatment planning in biomedical applications utilizing multiple pulsed electric fields, and the method proposed here, relating the pulse number to the conductivity through the variables in the Heaviside function, may be adapted to investigate the effect of other parameters, like pulse frequency and pulse width, on electroporation.
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Affiliation(s)
- Yajun Zhao
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, United States.,Bioelectromechanical Systems Laboratory, Virginia Tech, Blacksburg, VA, United States
| | - Shuang Zheng
- State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China.,School of Electrical Engineering, Chongqing University, Chongqing, China
| | - Natalie Beitel-White
- Bioelectromechanical Systems Laboratory, Virginia Tech, Blacksburg, VA, United States.,Department of Electrical and Computer Engineering at Virginia Tech, Blacksburg, VA, United States
| | - Hongmei Liu
- State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China.,School of Electrical Engineering, Chongqing University, Chongqing, China
| | - Chenguo Yao
- State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China.,School of Electrical Engineering, Chongqing University, Chongqing, China
| | - Rafael V Davalos
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA, United States.,Bioelectromechanical Systems Laboratory, Virginia Tech, Blacksburg, VA, United States
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15
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Peng J, Wu C, Zhang X, Wang X, Gonsamo A. Satellite detection of cumulative and lagged effects of drought on autumn leaf senescence over the Northern Hemisphere. Glob Chang Biol 2019; 25:2174-2188. [PMID: 30897264 DOI: 10.1111/gcb.14627] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 02/04/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Abstract
Climate change has substantial influences on autumn leaf senescence, that is, the end of the growing season (EOS). Relative to the impacts of temperature and precipitation on EOS, the influence of drought is not well understood, especially considering that there are apparent cumulative and lagged effects of drought on plant growth. Here, we investigated the cumulative and lagged effects of drought (in terms of the Standardized Precipitation-Evapotranspiration Index, SPEI) on EOS derived from the normalized difference vegetation index (NDVI3g) data over the Northern Hemisphere extra-tropical ecosystems (>30°N) during 1982-2015. The cumulative effect was determined by the number of antecedent months at which SPEI showed the maximum correlation with EOS (i.e., Rmax-cml ) while the lag effect was determined by a month during which the maximum correlation between 1-month SPEI and EOS occurred (i.e., Rmax-lag ). We found cumulative effect of drought on EOS for 27.2% and lagged effect for 46.2% of the vegetated land area. For the dominant time scales where the Rmax-cml and Rmax-lag occurred, we observed 1-4 accumulated months for the cumulative effect and 2-6 lagged months for the lagged effect. At the biome level, drought had stronger impacts on EOS in grasslands, savannas, and shrubs than in forests, which may be related to the different root functional traits among vegetation types. Considering hydrological conditions, the mean values of both Rmax-cml and Rmax-lag decreased along the gradients of annual SPEI and its slope, suggesting stronger cumulative and lagged effects in drier regions as well as in areas with decreasing water availability. Furthermore, the average accumulated and lagged months tended to decline along the annual SPEI gradient but increase with increasing annual SPEI. Our results revealed that drought has strong cumulative and lagged effects on autumn phenology, and considering these effects could provide valuable information on the vegetation response to a changing climate.
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Affiliation(s)
- Jie Peng
- The Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
- University of the Chinese Academy of Sciences, Beijing, China
| | - Chaoyang Wu
- The Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
- University of the Chinese Academy of Sciences, Beijing, China
| | - Xiaoyang Zhang
- Department of Geography, Geospatial Sciences Center of Excellence (GSCE), South Dakota State University, Brookings, South Dakota
| | - Xiaoyue Wang
- The Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
| | - Alemu Gonsamo
- Department of Geography and Planning, University of Toronto, Toronto, ON, Canada
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16
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Gao S, Liu R, Zhou T, Fang W, Yi C, Lu R, Zhao X, Luo H. Dynamic responses of tree-ring growth to multiple dimensions of drought. Glob Chang Biol 2018; 24:5380-5390. [PMID: 29963735 DOI: 10.1111/gcb.14367] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 06/07/2018] [Indexed: 05/25/2023]
Abstract
Droughts, which are characterized by multiple dimensions including frequency, duration, severity, and onset timing, can impact tree stem radial growth profoundly. Different dimensions of drought influence tree stem radial growth independently or jointly, which makes the development of accurate predictions a formidable challenge. Measurement-based tree-ring data have obvious advantages for studying the drought responses of trees. Here, we explored the use of abundant tree-ring records for quantifying regional response patterns to key dimensions of drought. Specifically, we designed a series of regional-scaled "natural experiments," based on 357 tree-ring chronologies from Southwest USA and location-matched monthly water balance anomalies, to reveal how tree-ring responds to each dimension of drought. Our results showed that tree-ring was affected significantly more by the water balance condition in the current hydrological year than that in the prior hydrological year. Within the current hydrological year, increased drought frequency (number of dry months) and duration (maximum number of consecutive dry months) resulted in "cumulative effects" which amplified the impacts of drought on trees and reduced the drought resistance of trees. Drought events that occurred in the pregrowing seasons strongly affected subsequent tree stem radial growth. Both the onset timing and severity of drought increased "legacy effects" on tree stem radial growth, which reduced the drought resilience of trees. These results indicated that the drought impact on trees is a dynamic process: even when the total water deficits are the same, differences among the drought processes could lead to considerably different responses from trees. This study thus provides a conceptual framework and probabilistic patterns of tree-ring growth response to multiple dimensions of drought regimes, which in turn may have a wide range of implications for predictions, uncertainty assessment, and forest management.
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Affiliation(s)
- Shan Gao
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, China
- Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education, Academy of Disaster Reduction and Emergency Management, Beijing Normal University, Beijing, China
- School of Earth and Environmental Sciences, Queens College, City University of New York, Queens, New York
| | - Ruishun Liu
- College of Resources and Environment, Northwest A&F University, Yangling, China
| | - Tao Zhou
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, China
- Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education, Academy of Disaster Reduction and Emergency Management, Beijing Normal University, Beijing, China
| | - Wei Fang
- School of Earth and Environmental Sciences, Queens College, City University of New York, Queens, New York
| | - Chuixiang Yi
- School of Earth and Environmental Sciences, Queens College, City University of New York, Queens, New York
- Earth and Environmental Sciences Department, the Graduate Center of the City University of New York, New York City, New York
| | - Ruijie Lu
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, China
| | - Xiang Zhao
- State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and Institute of Remote Sensing and Digital Earth of Chinese Academy of Sciences, Beijing, China
| | - Hui Luo
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, China
- Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education, Academy of Disaster Reduction and Emergency Management, Beijing Normal University, Beijing, China
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Han LW, Fu X, Yan Y, Wang CX, Wu G. [Identification of the cumulative eco-environment effect of coal-electricity integration based on interpretative structural model]. Ying Yong Sheng Tai Xue Bao 2017; 28:1653-1660. [PMID: 29745204 DOI: 10.13287/j.1001-9332.201705.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
In order to determine the cumulative eco-environmental effect of coal-electricity integration, we selected 29 eco-environmental factors including different development and construction activities of coal-electricity integration, soil, water, atmospheric conditions, biology, landscape, and ecology. Literature survey, expert questionnaire and interview were conducted to analyze the interactive relationships between different factors. The structure and correlations between the eco-environmental factors influenced by coal-electricity integration activities were analyzed using interpretive structural modeling (ISM) and the cumulative eco-environment effect of development and construction activities was determined. A research and evaluation framework for the cumulative eco-environmental effect was introduced in addition to specific evaluation and management needs. The results of this study would provide a theoretical and technical basis for planning and management of coal-electricity integration development activities.
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Affiliation(s)
- Lin Wei Han
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao Fu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yan Yan
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Chen Xing Wang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Gang Wu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.,University of Chinese Academy of Sciences, Beijing 100049, China
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18
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Schvartsman C, Pereira LAA, Braga ALF, Farhat SCL. Seven-day cumulative effects of air pollutants increase respiratory ER visits up to threefold. Pediatr Pulmonol 2017; 52:205-212. [PMID: 27575889 DOI: 10.1002/ppul.23555] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 08/01/2016] [Accepted: 08/07/2016] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Children are especially vulnerable to respiratory injury induced by exposure to air pollutants. In the present study, we investigate periods of up to 7 days, and evaluate the lagged effects of exposure to air pollutants on the daily number of children and adolescents visiting the emergency room (ER) for the treatment of lower respiratory obstructive diseases (LROD), in the city of São Paulo, Brazil. METHODS Daily records of LROD-related ER visits by children and adolescents under the age of 19, from January 2000 to December 2007 (2,922 days) were included in the study. Time-series regression models (generalized linear Poisson) were used to control for short- and long-term trends, as well as for temperature and relative humidity. Third-degree polynomial lag models were used to estimate both lag structures and the cumulative effects of air pollutants. Effects of air pollutants were expressed as the percentage increase in LROD-related ER visits. RESULTS We observed an acute effect at the same day of exposure to air pollutants; however, the cumulative effects of air pollutants on the number of LROD-related ER visits was almost threefold greater than the one observed at the same day of exposure to PM10 , SO2 , and NO2 mainly in children aged 5 years and under. The 7-day cumulative effect of SO2 reached 11.0% (95% CI: 5.0-16.7) increase in visits. Conclusion and Relevance: This study highlights the effects of intermediate-term exposure to air pollutants on LROD in children. Pediatr Pulmonol. 2017;52:205-212. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Cláudio Schvartsman
- Emergency Department, Children's Institute, Faculdade de Medicina da Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Luiz Alberto Amador Pereira
- Environmental Epidemiology Study Group, Laboratory of Experimental Air Pollution, Faculdade de Medicina da Universidade de São Paulo, Sao Paulo, Brazil.,Environmental Exposure and Risk Assessment Group, Collective Health Post-Graduation Program, Universidade Catolica de Santos, Sao Paulo, Brazil
| | - Alfésio Luiz Ferreira Braga
- Environmental Epidemiology Study Group, Laboratory of Experimental Air Pollution, Faculdade de Medicina da Universidade de São Paulo, Sao Paulo, Brazil.,Environmental Exposure and Risk Assessment Group, Collective Health Post-Graduation Program, Universidade Catolica de Santos, Sao Paulo, Brazil
| | - Sylvia Costa Lima Farhat
- Emergency Department, Children's Institute, Faculdade de Medicina da Universidade de Sao Paulo, Sao Paulo, Brazil.,Environmental Epidemiology Study Group, Laboratory of Experimental Air Pollution, Faculdade de Medicina da Universidade de São Paulo, Sao Paulo, Brazil
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19
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Garzon-Villalba XP, Mbah A, Wu Y, Hiles M, Moore H, Schwartz SW, Bernard TE. Exertional heat illness and acute injury related to ambient wet bulb globe temperature. Am J Ind Med 2016; 59:1169-1176. [PMID: 27779310 DOI: 10.1002/ajim.22650] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2016] [Indexed: 11/10/2022]
Abstract
BACKGROUND The Deepwater Horizon disaster cleanup effort provided an opportunity to examine the effects of ambient thermal conditions on exertional heat illness (EHI) and acute injury (AI). METHODS The outcomes were daily person-based frequencies of EHI and AI. Exposures were maximum estimated WBGT (WBGTmax) and severity. Previous day's cumulative effect was assessed by introducing previous day's WBGTmax into the model. RESULTS EHI and AI were higher in workers exposed above a WBGTmax of 20°C (RR 1.40 and RR 1.06/°C, respectively). Exposures above 28°C-WBGTmax on the day of the EHI and/or the day before were associated with higher risk of EHI due to an interaction between previous day's environmental conditions and the current day (RRs from 1.0-10.4). CONCLUSIONS The risk for EHI and AI were higher with increasing WBGTmax. There was evidence of a cumulative effect from the prior day's WBGTmax for EHI. Am. J. Ind. Med. 59:1169-1176, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
| | - Alfred Mbah
- College of Public Health; University of South Florida; Tampa Florida
| | - Yougui Wu
- College of Public Health; University of South Florida; Tampa Florida
| | - Michael Hiles
- College of Public Health; University of South Florida; Tampa Florida
| | - Hanna Moore
- College of Public Health; University of South Florida; Tampa Florida
| | - Skai W. Schwartz
- College of Public Health; University of South Florida; Tampa Florida
| | - Thomas E. Bernard
- College of Public Health; University of South Florida; Tampa Florida
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20
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Piggott JJ, Townsend CR, Matthaei CD. Climate warming and agricultural stressors interact to determine stream macroinvertebrate community dynamics. Glob Chang Biol 2015; 21:1887-906. [PMID: 25581853 DOI: 10.1111/gcb.12861] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Revised: 12/23/2014] [Accepted: 01/02/2015] [Indexed: 05/12/2023]
Abstract
Global climate change is likely to modify the ecological consequences of currently acting stressors, but potentially important interactions between climate warming and land-use related stressors remain largely unknown. Agriculture affects streams and rivers worldwide, including via nutrient enrichment and increased fine sediment input. We manipulated nutrients (simulating agricultural run-off) and deposited fine sediment (simulating agricultural erosion) (two levels each) and water temperature (eight levels, 0-6°C above ambient) simultaneously in 128 streamside mesocosms to determine the individual and combined effects of the three stressors on macroinvertebrate community dynamics (community composition and body size structure of benthic, drift and insect emergence assemblages). All three stressors had pervasive individual effects, but in combination often produced additive or antagonistic outcomes. Changes in benthic community composition showed a complex interplay among habitat quality (with or without sediment), resource availability (with or without nutrient enrichment) and the behavioural/physiological tendency to drift or emerge as temperature rose. The presence of sediment and raised temperature both resulted in a community of smaller organisms. Deposited fine sediment strongly increased the propensity to drift. Stressor effects were most prominent in the benthic assemblage, frequently reflected by opposite patterns in individuals quitting the benthos (in terms of their propensity to drift or emerge). Of particular importance is that community measures of stream health routinely used around the world (taxon richness, EPT richness and diversity) all showed complex three-way interactions, with either a consistently stronger temperature response or a reversal of its direction when one or both agricultural stressors were also in operation. The negative effects of added fine sediment, which were often stronger at raised temperatures, suggest that streams already impacted by high sediment loads may be further degraded under a warming climate. However, the degree to which this will occur may also depend on in-stream nutrient conditions.
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Affiliation(s)
- Jeremy J Piggott
- Department of Zoology, University of Otago, P.O. Box 56, Dunedin, 9054, New Zealand
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21
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Wang J, Liu J, Chen S, Gao Y, Meng F, Qiao L. Acupuncture effects on the hippocampal cholinergic system in a rat model of neuropathic pain. Neural Regen Res 2015; 7:212-8. [PMID: 25767502 PMCID: PMC4353117 DOI: 10.3969/j.issn.1673-5374.2012.03.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Accepted: 12/25/2011] [Indexed: 11/18/2022] Open
Abstract
The present study observed the effects of repeated electroacupuncture of Zusanli (ST36) and Yanglingquan (GB34) on expression of hippocampal acetylcholinesterase, vesicular acetylcholine transporter, and muscarinic M1 receptor mRNA in chronic constrictive injury (neuropathic pain) and/or ovariotomy rats. Results demonstrated increased expression of hippocampal acetylcholinesterase, vesicular acetylcholine transporter, and muscarinic M1 receptor mRNA, as well as decreased pain threshold, in a rat model of chronic neuropathic pain after electroacupuncture. The effects of electroacupuncture increased with prolonged time, but the above-mentioned effects decreased in memory-deficient animals. Results indicated that repeated electroacupuncture has a cumulative analgesic effect, which is closely associated with upregulation of acetylcholinesterase and vesicular acetylcholine transporter activity, as well as M1 receptor mRNA expression and memory.
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Affiliation(s)
- Junying Wang
- Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Junling Liu
- Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Shuping Chen
- Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Yonghui Gao
- Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Fanying Meng
- Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Lina Qiao
- Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
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22
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Xu Q, Liu T, Chen S, Gao Y, Wang J, Qiao L, Liu J. The cumulative analgesic effect of repeated electroacupuncture involves synaptic remodeling in the hippocampal CA3 region. Neural Regen Res 2015; 7:1378-85. [PMID: 25657670 PMCID: PMC4308787 DOI: 10.3969/j.issn.1673-5374.2012.18.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Accepted: 05/03/2012] [Indexed: 11/18/2022] Open
Abstract
In the present study, we examined the analgesic effect of repeated electroacupuncture at bilateral Zusanli (ST36) and Yanglingquan (GB34) once a day for 14 consecutive days in a rat model of chronic sciatic nerve constriction injury-induced neuropathic pain. In addition, concomitant changes in calcium/calmodulin-dependent protein kinase II expression and synaptic ultrastructure of neurons in the hippocampal CA3 region were examined. The thermal pain threshold (paw withdrawal latency) was increased significantly in both groups at 2 weeks after electroacupuncture intervention compared with 2 days of electroacupuncture. In ovariectomized rats with chronic constriction injury, the analgesic effect was significantly reduced. Electroacupuncture for 2 weeks significantly diminished the injury-induced increase in synaptic cleft width and thinning of the postsynaptic density, and it significantly suppressed the down-regulation of intracellular calcium/calmodulin-dependent protein kinase II expression in the hippocampal CA3 region. Repeated electroacupuncture intervention had a cumulative analgesic effect on injury-induced neuropathic pain reactions, and it led to synaptic remodeling of hippocampal neurons and upregulated calcium/calmodulin-dependent protein kinase II expression in the hippocampal CA3 region.
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Affiliation(s)
- Qiuling Xu
- Hainan Medical University, Haikou 571101, Hainan Province, China
| | - Tao Liu
- Hainan Medical University, Haikou 571101, Hainan Province, China
| | - Shuping Chen
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Yonghui Gao
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Junying Wang
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Lina Qiao
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Junling Liu
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
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Piggott JJ, Salis RK, Lear G, Townsend CR, Matthaei CD. Climate warming and agricultural stressors interact to determine stream periphyton community composition. Glob Chang Biol 2015; 21:206-22. [PMID: 24942814 DOI: 10.1111/gcb.12661] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 06/09/2014] [Accepted: 06/12/2014] [Indexed: 05/06/2023]
Abstract
Lack of knowledge about how the various drivers of global climate change will interact with multiple stressors already affecting ecosystems is the basis for great uncertainty in projections of future biological change. Despite concerns about the impacts of changes in land use, eutrophication and climate warming in running waters, the interactive effects of these stressors on stream periphyton are largely unknown. We manipulated nutrients (simulating agricultural runoff), deposited fine sediment (simulating agricultural erosion) (two levels each) and water temperature (eight levels, 0-6 °C above ambient) simultaneously in 128 streamside mesocosms. Our aim was to determine the individual and combined effects of the three stressors on the algal and bacterial constituents of the periphyton. All three stressors had pervasive individual effects, but in combination frequently produced synergisms at the population level and antagonisms at the community level. Depending on sediment and nutrient conditions, the effect of raised temperature frequently produced contrasting response patterns, with stronger or opposing effects when one or both stressors were augmented. Thus, warming tended to interact negatively with nutrients or sediment by weakening or reversing positive temperature effects or strengthening negative ones. Five classes of algal growth morphology were all affected in complex ways by raised temperature, suggesting that these measures may prove unreliable in biomonitoring programs in a warming climate. The evenness and diversity of the most abundant bacterial taxa increased with temperature at ambient but not with enriched nutrient levels, indicating that warming coupled with nutrient limitation may lead to a more evenly distributed bacterial community as temperatures rise. Freshwater management decisions that seek to avoid or mitigate the negative effects of agricultural land use on stream periphyton should be informed by knowledge of the interactive effects of multiple stressors in a warming climate.
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Affiliation(s)
- Jeremy J Piggott
- Department of Zoology, University of Otago, P.O. Box 56, Dunedin, 9054, New Zealand
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24
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Xu Q, Liu T, Chen S, Gao Y, Wang J, Qiao L, Liu J. Correlation between the cumulative analgesic effect of electroacupuncture intervention and synaptic plasticity of hypothalamic paraventricular nucleus neurons in rats with sciatica. Neural Regen Res 2014; 8:218-25. [PMID: 25206591 PMCID: PMC4107526 DOI: 10.3969/j.issn.1673-5374.2013.03.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 12/10/2012] [Indexed: 01/11/2023] Open
Abstract
In the present study, a rat model of chronic neuropathic pain was established by ligation of the sciatic nerve and a model of learning and memory impairment was established by ovariectomy to investigate the analgesic effect of repeated electroacupuncture stimulation at bilateral Zusanli (ST36) and Yanglingquan (GB34). In addition, associated synaptic changes in neurons in the paraventricular nucleus of the hypothalamus were examined. Results indicate that the thermal pain threshold (paw withdrawal latency) was significantly increased in rats subjected to 2-week electroacupuncture intervention compared with 2-day electroacupuncture, but the analgesic effect was weakened remarkably in ovariectomized rats with chronic constrictive injury. 2-week electroacupuncture intervention substantially reversed the chronic constrictive injury-induced increase in the synaptic cleft width and thinning of the postsynaptic density. These findings indicate that repeated electroacupuncture at bilateral Zusanli and Yanglingquan has a cumulative analgesic effect and can effectively relieve chronic neuropathic pain by remodeling the synaptic structure of the hypothalamic paraventricular nucleus.
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Affiliation(s)
- Qiuling Xu
- Hainan Medical University, Haikou 571101, Hainan Province, China
| | - Tao Liu
- Hainan Medical University, Haikou 571101, Hainan Province, China
| | - Shuping Chen
- Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Yonghui Gao
- Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Junying Wang
- Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Lina Qiao
- Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Junling Liu
- Institute of Acu-moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, China
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25
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Wang M, Chu H, Lv Q, Wang L, Yuan L, Fu G, Tong N, Qin C, Yin C, Zhang Z, Xu J. Cumulative effect of genome-wide association study-identified genetic variants for bladder cancer. Int J Cancer 2014; 135:2653-60. [PMID: 24740636 DOI: 10.1002/ijc.28898] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 02/06/2014] [Accepted: 04/03/2014] [Indexed: 11/08/2022]
Abstract
Recent genome-wide association studies have identified 14 genetic variants associated with bladder cancer in Caucasians. The effects of these risk variants and their cumulative effects in Asian populations are unknown. We genotyped these newly identified variants in a case-control study of 1,050 patients diagnosed with bladder cancer and 1,404 controls in the Chinese population. Odds rations (ORs) and 95% confidence intervals (CIs) were computed by logistic regression, and cumulative effect of risk alleles were evaluated. Overall, seven of the 14 variants were significantly associated with bladder cancer risk (p = 9.763 × 10(-3) for rs9642880 at 8q24.21, p = 3.004 × 10(-3) for rs2294008 at 8q24.3, p = 0.012 for rs798766 at 4p16.3, p = 0.034 for rs1495741 at 8p22, p = 2.306 × 10(-4) for GSTM1, p = 8.507 × 10(-8) for rs17674580 at 18q12.3, p = 7.179 × 10(-4) for rs10936599 at 3q26.2) and the odds ratios (ORs) ranged from 1.13 to 1.65. Moreover, there were a significant increased risk for bladder cancer positively correlated numbers of risk alleles and smoking status (Ptrend = 7.060 × 10(-16) ). However, no allelic interaction effects on bladder cancer risk were observed between cumulative effects of variants and clinical characteristics. These findings suggest that seven bladder cancer risk-associated variants (rs9642880, rs2294008, rs798766, rs1495741, GSTM1 null, rs17674580 and rs10936599) may be used, collectively, to effectively measure inherited risk for bladder cancer.
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Affiliation(s)
- Meilin Wang
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, Nanjing, China; Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China; Department of Environmental Genomics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Cancer Center, Nanjing Medical University, Nanjing, China
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Fjolstad M. The effects of Clostridium botulinum toxin type C beta given orally to goats. Acta Vet Scand 1973; 14:69-80. [PMID: 4580956 PMCID: PMC8559805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Feeding experiments with Clostridium botulinum toxin type Cβ were carried out using 11 goats. The toxin, which originated partly from the liver of a cat carcass and partly from broth inoculated with Cl. botulinum type Cβ isolated from the cat liver, was given to the goats through a rubber stomach-tube. Symptoms of botulism usually occurred on the second or third day after the challenge. Death was caused by doses of toxin as small as 0.5 MMLD (minimum mouse lethal dose) per g body weight of goat, and 1 MMLD per g was considered to be lethal for goats when they are fed hay and concentrated fodder. When the animals were grazing or received ensilage they seemed to tolerate somewhat higher doses. A cumulative effect was shown to take place when the doses of toxin were given in the course of 8 days. A sensitizing effect of many small doses could not be demonstrated. On the contrary, animals which had received several small doses of toxin later on tolerated doses which caused death in inexperienced animals. One of these animals tolerated a dose approx. 3 times higher than a dose usually causing death. Serum from such goats, however, did not give demonstrable protection in mice challenged to botulinum toxin type Cβ. Toxin could not be demonstrated in samples of serum from goats showing symptoms of botulism. In 2 of 9 animals toxin could be demonstrated in samples from the liver, but only after the liver had remained in the carcass for approx. 20 hrs. after death.
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