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Yang C, Wang XK, Ma SZ, Lee NY, Zhang QR, Dong WQ, Zang YF, Yuan LX. Abnormal functional connectivity of the reward network is associated with social communication impairments in autism spectrum disorder: A large-scale multi-site resting-state fMRI study. J Affect Disord 2024; 347:608-618. [PMID: 38070748 DOI: 10.1016/j.jad.2023.12.013] [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: 08/17/2023] [Revised: 10/28/2023] [Accepted: 12/02/2023] [Indexed: 12/17/2023]
Abstract
BACKGROUND The social motivation hypothesis proposes that the social deficits of autism spectrum disorder (ASD) are related to reward system dysfunction. However, functional connectivity (FC) patterns of the reward network in ASD have not been systematically explored yet. METHODS The reward network was defined as eight regions of interest (ROIs) per hemisphere, including the nucleus accumbens (NAc), caudate, putamen, anterior cingulate cortex (ACC), ventromedial prefrontal cortex (vmPFC), orbitofrontal cortex (OFC), amygdala, and insula. We computed both the ROI-wise resting-state FC and seed-based whole-brain FC in 298 ASD participants and 348 typically developing (TD) controls from the Autism Brain Imaging Data Exchange I dataset. Two-sample t-tests were applied to obtain the aberrant FCs. Then, the association between aberrant FCs and clinical symptoms was assessed with Pearson's correlation or Spearman's correlation. In addition, Neurosynth Image Decoder was used to generate word clouds verifying the cognitive functions of the aberrant pathways. Furthermore, a three-way multivariate analysis of variance (MANOVA) was conducted to examine the effects of gender, subtype and age on the atypical FCs. RESULTS For the within network analysis, the left ACC showed weaker FCs with both the right amygdala and left NAc in ASD compared with TD, which were negatively correlated with the Autism Diagnostic Observation Schedule (ADOS) total scores and Social Responsiveness Scale (SRS) total scores respectively. For the whole-brain analysis, weaker FC (i.e., FC between the left vmPFC and left calcarine gyrus, and between the right vmPFC and left precuneus) accompanied by stronger FC (i.e., FC between the left caudate and right insula) were exhibited in ASD relative to TD, which were positively associated with the SRS motivation scores. Additionally, we detected the main effect of age on FC between the left vmPFC and left calcarine gyrus, of subtype on FC between the right vmPFC and left precuneus, of age and age-by-gender interaction on FC between the left caudate and right insula. CONCLUSIONS Our findings highlight the crucial role of abnormal FC patterns of the reward network in the core social deficits of ASD, which have the potential to reveal new biomarkers for ASD.
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Affiliation(s)
- Chen Yang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang, China; Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang, China
| | - Xing-Ke Wang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang, China
| | - Sheng-Zhi Ma
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang, China; Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang, China
| | - Nathan Yee Lee
- Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
| | - Qiu-Rong Zhang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang, China; Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang, China
| | - Wen-Qiang Dong
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang, China; Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang, China
| | - Yu-Feng Zang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang, China; Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang, China; TMS Center, Hangzhou Normal University Affiliated Deqing Hospital, Huzhou, China
| | - Li-Xia Yuan
- School of Physics, Zhejiang University, Hangzhou, China; National Key Laboratory of Cognitive Neuroscience and Learning, Beijing, China.
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Wang XK, Yang C, Dong WQ, Zhang QR, Ma SZ, Zang YF, Yuan LX. Impaired segregation of the attention deficit hyperactivity disorder related pattern in children. J Psychiatr Res 2024; 170:111-121. [PMID: 38134720 DOI: 10.1016/j.jpsychires.2023.12.018] [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: 08/11/2023] [Revised: 12/05/2023] [Accepted: 12/10/2023] [Indexed: 12/24/2023]
Abstract
BACKGROUND Inattention is a key characteristic of attention deficit hyperactivity disorder (ADHD). Specific brain abnormalities associated with this symptom form a discernible pattern related with ADHD in children (i.e., ADHD related pattern) in our earlier research. The developmental processes of segregation and integration may be crucial to ADHD. However, how brains reconfigure these processes of the ADHD related pattern in different subtypes of ADHD and across sexes remain unclear. METHODS Nested-spectral partition method was applied to identify effects of subtype and sex on segregation and integration of the ADHD related pattern, using 145 ADHD patients and 135 typically developing controls (TDC) aged 7-14. Relationships between the measures and inattention symptoms were also investigated. RESULTS Children with ADHD exhibited lower segregation of the ADHD related pattern (p = 1.17 × 10-8) than TDCs. Only the main effect of subtype was significant (p = 1.14 × 10-5). Both ADHD-C (p = 2.16 × 10-6) and ADHD-I (p = 2.87 × 10-6) patients had lower segregation components relative to the TDC. Moreover, segregation components were negatively correlated with inattention scores. CONCLUSIONS This study identified impaired segregation in the ADHD related pattern of children with ADHD and found shared neural bases among different subtypes and sexes.
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Affiliation(s)
- Xing-Ke Wang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Jing Hengyi School of Education, Hangzhou Normal University, Hangzhou, China
| | - Chen Yang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang, China
| | - Wen-Qiang Dong
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang, China
| | - Qiu-Rong Zhang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang, China
| | - Sheng-Zhi Ma
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang, China
| | - Yu-Feng Zang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang, China; TMS Center, Deqing Hospital of Hangzhou Normal University, Deqing, Zhejiang, China
| | - Li-Xia Yuan
- School of Physics, Zhejiang University, Hangzhou, China.
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Yang B, Wang M, Zhou W, Wang X, Chen S, Yuan LX, Dong GH. Edge-centric functional network analyses reveal disrupted network configuration in autism spectrum disorder. J Affect Disord 2023; 336:74-80. [PMID: 37201902 DOI: 10.1016/j.jad.2023.05.025] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/04/2023] [Accepted: 05/08/2023] [Indexed: 05/20/2023]
Abstract
BACKGROUND Neuroscientific evidence suggests that the pathological symptoms associated with autism spectrum disorders (ASD) are not confined to a single brain region but involve networks of the brain on a larger spatial scale. Analyzing diagrams of edge-edge interactions could provide important perspectives on the organization and function of complex systems. METHODS Resting-state fMRI data from 238 ASD patients and 311 healthy controls (HCs) were included in the current study. We used the thalamus as the mediating node to calculate the edge functional connectivity (eFC) of the brain network and compared the ASD subjects and HCs. RESULTS Compared with the HCs, the ASD subjects exhibited abnormalities in the central node thalamus and four brain regions (amygdala, nucleus accumbens, pallidum and hippocampus), as well as in the eFC formed by the inferior frontal gyrus (IFG) (or middle temporal gyrus (MTG)). In addition, ASD subjects showed variable characteristics of the eFC between nodes in different networks. CONCLUSIONS The changes in these brain regions may be due to the disturbance in the reward system, which leads to coherence in the instantaneous comovement of the functional connections formed by these brain regions in ASD. This notion also reveals a functional network feature between the cortical and subcortical regions in ASD.
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Affiliation(s)
- Bo Yang
- Department of Psychology, Yunnan Normal University, Kunming, Yunnan Province, PR China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China
| | - Min Wang
- Department of Psychology, Yunnan Normal University, Kunming, Yunnan Province, PR China
| | - Weiran Zhou
- Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China
| | - Xiuqin Wang
- Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China
| | - Shuaiyu Chen
- Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China
| | - Li-Xia Yuan
- Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China
| | - Guang-Heng Dong
- Department of Psychology, Yunnan Normal University, Kunming, Yunnan Province, PR China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China.
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Yu D, Zhao ZY, Yang YL, Qin Y, Pan D, Yuan LX, Huang YW, Wang B. The origin and evolution of emerged swine acute diarrhea syndrome coronavirus with zoonotic potential. J Med Virol 2023; 95:e28672. [PMID: 36916779 DOI: 10.1002/jmv.28672] [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: 12/02/2022] [Revised: 02/28/2023] [Accepted: 03/10/2023] [Indexed: 03/16/2023]
Abstract
Swine acute diarrhea syndrome coronavirus (SADS-CoV) is a newly discovered alphacoronavirus with zoonotic potential that causes diarrhea and vomiting mainly in piglets. Having emerged suddenly in 2017, the prevailing opinion is that the virus originated from HKU2, an alphacoronavirus whose primary host is bats, and at some unknown point achieved interspecies transmission via some intermediate. Here, we further explore the evolutionary history and possible cross-species transmission event for SADS-CoV. Coevolutionary analysis demonstrated that HKU2 may have achieved host switch via SADS-related (SADSr)-CoV, which was isolated from the genus Rhinolophus in 2017. SADS-CoV, HKU2 and SADSr-CoV share similar codon usage patterns and showed a lower tendency to use CpG, which may reflect a method of immune escape. The analyses of virus-host coevolution and recombination support SADSr-CoV is the direct source of SADS-CoV that may have undergone recombination events during its formation. Structure-based spike glycoprotein variance analysis revealed a more nuanced evolutionary pathway to receptor recognition for host switch. We did not find a possible positive selection site, and the dN/dS of the S gene was only 0.29, which indicates that the current SADS-CoV is slowly evolving. These results provide new insights that may help predict future cross-species transmission, and possibly surveil future zoonotic outbreaks and associated public health emergencies. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- De Yu
- Department of Veterinary Medicine, Zhejiang University, Hangzhou, China
| | - Zhuang-Yan Zhao
- Department of Veterinary Medicine, Zhejiang University, Hangzhou, China
| | - Yong-Le Yang
- Department of Veterinary Medicine, Zhejiang University, Hangzhou, China
| | - Yu Qin
- Department of Veterinary Medicine, Zhejiang University, Hangzhou, China
| | - Dan Pan
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Li-Xia Yuan
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Yao-Wei Huang
- Department of Veterinary Medicine, Zhejiang University, Hangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Bin Wang
- Department of Veterinary Medicine, Zhejiang University, Hangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
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Wu QW, Yuan LX, Zheng R, Wang XY, Qiu HJ, Zhang YN, Huang XK, Yang QT. [The Top 100 papers in the Journal of Allergy and Clinical Immunology of 90th anniversary]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2023; 58:303-310. [PMID: 36878517 DOI: 10.3760/cma.j.cn115330-20220721-00452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Affiliation(s)
- Q W Wu
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China Department of Allergy, the Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China
| | - L X Yuan
- Department of Science and Research, the Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China
| | - R Zheng
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China
| | - X Y Wang
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China
| | - H J Qiu
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China
| | - Y N Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China
| | - X K Huang
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China
| | - Q T Yang
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China Department of Allergy, the Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China
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Yang B, Wang M, Zhou W, Wang X, Chen S, Potenza MN, Yuan LX, Dong GH. Disrupted network integration and segregation involving the default mode network in autism spectrum disorder. J Affect Disord 2023; 323:309-319. [PMID: 36455716 DOI: 10.1016/j.jad.2022.11.083] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 11/20/2022] [Accepted: 11/24/2022] [Indexed: 11/30/2022]
Abstract
Changes in the brain's default mode network (DMN) in the resting state are closely related to autism spectrum disorder (ASD). Module segmentation can effectively elucidate the neural mechanism of ASD and explore intra- and inter-network connections by means of the participation coefficient (PC). We used that resting-state fMRI data from 269 ASD patients and 340 healthy controls (HCs) in the current study. From the results, ASD subjects showed a significantly higher PC of the DMN than HC subjects. This difference was related to lower intra-module connections within the DMN and higher inter-network connections between the DMN and other networks. When the subjects were split into age groups, the results were verified in the 7-12- and 12-18-year-old age groups but not in the young adult group (18-25 years). When the subjects were divided according to different subtypes of ASD, the results were also observed in the classic autism and pervasive developmental disorder groups, but not in the Asperger disorder group. In conclusions, less developed network segregation in the DMN could be a valid biomarker for ASD. This provides network scientists with new insights into the intermodular connectivity configurations of complex networks from different dimensions in a systematic and comprehensive manner.
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Affiliation(s)
- Bo Yang
- Center for Cognition and Brain Disorders, School of Clinical Medicine and the Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, PR China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China
| | - Min Wang
- Center for Cognition and Brain Disorders, School of Clinical Medicine and the Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, PR China
| | - Weiran Zhou
- Center for Cognition and Brain Disorders, School of Clinical Medicine and the Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, PR China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China
| | - Xiuqin Wang
- Center for Cognition and Brain Disorders, School of Clinical Medicine and the Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, PR China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China
| | - Shuaiyu Chen
- Center for Cognition and Brain Disorders, School of Clinical Medicine and the Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, PR China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China
| | | | - Li-Xia Yuan
- Center for Cognition and Brain Disorders, School of Clinical Medicine and the Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, PR China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China.
| | - Guang-Heng Dong
- Center for Cognition and Brain Disorders, School of Clinical Medicine and the Affiliated Hospital of Hangzhou Normal University, Hangzhou, Zhejiang Province, PR China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China.
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Lu QJ, Li JY, Lin HX, Cai YS, Liu CS, Fu LP, Liu G, Yuan LX. Danggui Niantong granules ameliorate rheumatoid arthritis by regulating intestinal flora and promoting mitochondrial apoptosis. Pharm Biol 2022; 60:1606-1615. [PMID: 35961296 PMCID: PMC9377239 DOI: 10.1080/13880209.2022.2107018] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 07/05/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
CONTEXT Danggui Niantong Granules (DGNTG) are a valid and reliable traditional herbal formula, commonly used in clinical practice to treat rheumatoid arthritis (RA). However, the mechanism of its effect on RA remains unclear. OBJECTIVE An investigation of the therapeutic effects of DGNTG on RA. MATERIALS AND METHODS Twenty-four male Sprague-Dawley (SD) rats were divided into four groups: control, model, DGNTG (2.16 g/kg, gavage), methotrexate (MTX) (1.35 mg/kg, gavage) for 28 days. The morphology of synovial and ankle tissues was observed by haematoxylin-eosin staining. The responses of mitochondrial apoptosis were assessed by qPCR, Western blotting and immunohistochemical staining. Rat faeces were analysed by 16S rRNA sequencing. RESULTS Our results showed that DGNTG treatment reduced AI scores (7.83 ± 0.37 vs. 4.67 ± 0.47, p < 0.01) and paw volumes (7.63 ± 0.17 vs. 6.13 ± 0.11, p < 0.01) compared with the model group. DGNTG also increased the expression of Bax (0.34 ± 0.03 vs. 0.73 ± 0.03, p < 0.01), cytochrome c (CYTC) (0.24 ± 0.02 vs. 0.64 ± 0.01, p < 0.01) and cleaved caspase-9 (0.24 ± 0.04 vs. 0.83 ± 0.08, p < 0.01), and decreased bcl-2 (1.70 ± 0.11 vs. 0.60 ± 0.09, p < 0.01) expression. DGNTG treatment regulated the structure of gut microbiota. DISCUSSION AND CONCLUSIONS DGNTG ameliorated RA by promoting mitochondrial apoptosis, which may be associated with regulating gut microbiota structure. DGNTG can be used as a supplement and alternative drug for the treatment of RA; its ability to prevent RA deserves further study.
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Affiliation(s)
- Qi-Jin Lu
- Traditional Chinese Pharmacological Laboratory, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Jia-Yu Li
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Hong-Xin Lin
- Traditional Chinese Pharmacological Laboratory, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Yi-Si Cai
- Traditional Chinese Pharmacological Laboratory, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Chang-Shun Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou, China
| | - Li-Ping Fu
- Nanfang Hospital of Southern Medical University, Guangzhou, China
| | - Gang Liu
- Nanfang Hospital of Southern Medical University, Guangzhou, China
| | - Li-Xia Yuan
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou, China
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Li M, Liu G, Yuan LX, Yang J, Liu J, Li Z, Yang C, Wang J. Triphenyl phosphate (TPP) promotes hepatocyte toxicity via induction of endoplasmic reticulum stress and inhibition of autophagy flux. Sci Total Environ 2022; 840:156461. [PMID: 35660595 DOI: 10.1016/j.scitotenv.2022.156461] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/30/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
Triphenyl phosphate (TPP), a commonly used organophosphate flame retardant, is frequently found in environmental and biota samples, indicating widespread human exposure. Recent studies have shown that TPP causes hepatotoxicity, but the underlying cellular mechanisms are not fully elucidated. Here, by using normal hepatocyte AML12 cells as a model, we showed that TPP induced apoptotic cell death. RNA sequencing analyses revealed that differentially expressed genes induced by TPP were related to endoplasmic reticulum (ER) stress and autophagy. Immunostaining and western blot results further confirmed that TPP activated ER stress. Interestingly, though TPP increased LC3-II, a canonical marker for autophagy, TPP inhibited autophagy flux rather than induced autophagy. Interestingly, TPP-induced ER stress facilitated autophagy flux inhibition and apoptosis. Furthermore, inhibition of autophagy aggravated, and activation of autophagy attenuated apoptosis induced by TPP. Collectively, these results uncovered that ER stress and autophagy flux inhibition were responsible for TPP-induced apoptosis in mouse hepatocytes. Thus, our foundlings provided novel insight into the potential mechanisms of TPP-induced hepatocyte toxicity.
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Affiliation(s)
- Miaoran Li
- Department of Rehabilitation Medicine, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China; Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - Gang Liu
- Department of Rehabilitation Medicine, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Li-Xia Yuan
- School of Traditional Chinese Medicine, Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, China
| | - Jing Yang
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - Jing Liu
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - Zhijie Li
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China
| | - Chuanbin Yang
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China.
| | - Jigang Wang
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen 518020, China; School of Traditional Chinese Medicine, Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, China; Artemisinin Research Center, Institute of Chinese Materia Medica, Chinese Academy of Chinese Medical Sciences, Beijing 100700, China.
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Chen MW, Lu QJ, Chen YJ, Hou YK, Zou YM, Zhou Q, Zhang WH, Yuan LX, Chen JX. NIR-PTT/ROS-Scavenging/Oxygen-Enriched Synergetic Therapy for Rheumatoid Arthritis by a pH-Responsive Hybrid CeO 2-ZIF-8 Coated with Polydopamine. ACS Biomater Sci Eng 2022; 8:3361-3376. [PMID: 35819069 DOI: 10.1021/acsbiomaterials.2c00592] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Rheumatoid arthritis (RA) is an inflammatory type of arthritis that causes joint pain and damage. The inflammatory cell infiltration (e.g., M1 macrophages), the poor O2 supply at the joint, and the excess reactive oxygen species (ROS)-induced oxidative injury are the main causes of RA. We herein report a polydopamine (PDA)-coated CeO2-dopped zeolitic imidazolate framework-8 (ZIF-8) nanocomposite CeO2-ZIF-8@PDA (denoted as CZP) that can synergistically treat RA. Under near-infrared (NIR) light irradiation, PDA efficiently scavenges ROS and results in an increased temperature in the inflamed area because of its good light-to-heat conversion efficiency. The rise of temperature serves to obliterate hyper-proliferative inflammatory cells accumulated in the diseased area while vastly promoting the collapse of the acidic-responsive skeleton of ZIF-8 to release the encapsulated CeO2. The released CeO2 exerts its catalase-like activity to relieve hypoxia by generating oxygen via the decomposition of H2O2 highly expressed in the inflammatory sites. Thus, the constructed CZP composite can treat RA through NIR-photothermal/ROS-scavenging/oxygen-enriched combinative therapy and show good regression of pro-inflammatory cytokines and hypoxia-inducible factor-1α (HIF-1α) in vitro and promising therapeutic effect on RA in rat models. The multimodal nano-platform reported herein is expected to shed light on the design of synergistic therapeutic nanomedicine for effective RA therapy.
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Affiliation(s)
- Ming-Wa Chen
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - Qi-Jin Lu
- School of Chinese Medicine, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - Yong-Jian Chen
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - Ying-Ke Hou
- Department of Medical Imaging, Third Affiliated Hospital of Southern Medical University (Academy of Orthopedics Guangdong Province), Southern Medical University, Guangzhou, Guangdong 510630, People's Republic of China
| | - Yi-Ming Zou
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - Quan Zhou
- Department of Medical Imaging, Third Affiliated Hospital of Southern Medical University (Academy of Orthopedics Guangdong Province), Southern Medical University, Guangzhou, Guangdong 510630, People's Republic of China
| | - Wen-Hua Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Li-Xia Yuan
- School of Chinese Medicine, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - Jin-Xiang Chen
- NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, People's Republic of China
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10
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Wu QW, Kong WF, Yuan LX, Ren Y, Zhang YN, Deng HY, Luo X, Chen JN, Huang XK, Yang QT. [A comparative study of artificial intelligence nasal polyp classification based on whole-slide imaging and JESREC diagnostic criteria]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 57:136-141. [PMID: 35196756 DOI: 10.3760/cma.j.cn115330-20210730-00500] [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
Objective: To explore the types and clinical characteristics of chronic rhinosinusitis with nasal polyps (CRSwNP) based on artificial intelligence and whole-slide imaging (WSI), and to explore the consistency of the diagnostic criteria of the Japanese epidemiological survey of refractory eosinophilic chronic rhinosinusitis (JESREC) in Chinese CRSwNP patients. Methods: The data of 136 patients with CRSwNP (101 males and 35 females, aging 14 to 70 years) who underwent endoscopic sinus surgery from 2018 to 2019 in the Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University were analysed retrospectively. The preoperative clinical characteristics of patients were collected, such as visual analogue scale (VAS) of nasal symptoms, peripheral blood inflammatory cell count, total immunoglobulin E (IgE), Lund-Kennedy score and Lund-Mackay score. The proportion of inflammatory cells such as eosinophils, lymphocytes, plasma cells and neutrophils were calculated on the WSI of each patient through artificial intelligence chronic rhinosinusitis evaluation platform 2.0 (AICEP 2.0), and the specific type of nasal polyps was then obtained as eosinophilic CRSwNP (eCRSwNP) or non-eosinophilic CRSwNP (non-eCRSwNP). In addition, the JESREC diagnostic criteria was used to classify the nasal polyps, and the classification results were compared with the current gold standard for nasal polyps diagnosis (pathological diagnosis based on WSI). The accuracy, sensitivity and specificity of the diagnostic criteria of JESREC were evaluated. The data were expressed in M (Q1, Q3) and statistically analyzed by SPSS 17.0. Results: There was no significant difference between eCRSwNP and non-eCRSwNP in age distribution, gender, time of onset, total VAS score, Lund-Kennedy score or Lund-Mackay score. However, there was a significant difference in the ratio of nasal polyp inflammatory cells (eosinophils 40.5% (22.8%, 54.7%) vs 2.5% (1.0%, 5.3%), neutrophils 0.3% (0.1%, 0.7%) vs 1.3% (0.5%, 3.6%), lymphocytes 49.9% (39.3%, 65.9%) vs 82.0% (72.8%, 87.5%), plasma cells 5.1% (3.6%, 10.5%) vs 13.0% (7.4%, 16.3%), χ2 value was 9.91, 4.66, 8.28, 5.06, respectively, all P<0.05). In addition, eCRSwNP had a significantly higher level of proportion of allergic symptoms (nasal itching and sneezing), asthma, peripheral blood eosinophil and total IgE (all P<0.05). The overall accuracy, sensitivity and specificity of the JESREC diagnostic criteria was 74.3%, 81.3% and 64.3%, respectively. Conclusions: The eCRSwNP based on artificial intelligence and WSI has significant high level of allergic symptoms, asthma, peripheral blood eosinophils and total IgE, and the percentages of inflammatory cells in nasal polyps are different from that of non-eCRSwNP. The JESREC diagnostic criteria has good consistency in our research.
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Affiliation(s)
- Q W Wu
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China Department of Allergy, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - W F Kong
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - L X Yuan
- Department of Science and Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Y Ren
- Guangdong Provincial Key Laboratory of Digestive Cancer Research, the Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen 518107, China
| | - Y N Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - H Y Deng
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - X Luo
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - J N Chen
- Department of Pathology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - X K Huang
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Q T Yang
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China Department of Allergy, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
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11
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Wang XQ, Albitos PJ, Hao YF, Zhang H, Yuan LX, Zang YF. A review of objective assessments for hyperactivity in attention deficit hyperactivity disorder. J Neurosci Methods 2022; 370:109479. [PMID: 35038458 DOI: 10.1016/j.jneumeth.2022.109479] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 01/06/2022] [Indexed: 11/26/2022]
Abstract
Hyperactivity is one of the three core symptoms of attention deficit hyperactivity disorder (ADHD) that is a common childhood mental disorder. Objective assessments of hyperactivity are seldom utilized compared with measures of inattention and impulsivity during clinical diagnosis and evaluation. Acceleration-sensitive devices (e.g., Actigraph) and motion tracking systems (e.g., QbTest) are two main groups of devices that can be used to objectively measure hyperactivity. The Actigraph and QbTest have good discriminant validity, convergent validity, and sensitivity to the effects of stimulants. Furthermore, the assessment setting (i.e., research laboratory, school, or home) can greatly influence the presence and severity of hyperactivity. Nevertheless, objective assessments for hyperactivity have poor ability to distinguish ADHD from other disorders, or among the three types of ADHD. Thus, further studies are needed to assess objective measurements of hyperactivity in terms of discriminant and convergent validity, test-retest reliability in different settings, and correlations with brain activity.
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Affiliation(s)
- Xiu-Qin Wang
- Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, China; Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Princess Jane Albitos
- Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, China; Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Yong-Fu Hao
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Hang Zhang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Li-Xia Yuan
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China.
| | - Yu-Feng Zang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China; Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China.
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12
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Wang XK, Wang XQ, Yang X, Yuan LX. Gray Matter Network Associated With Attention in Children With Attention Deficit Hyperactivity Disorder. Front Psychiatry 2022; 13:922720. [PMID: 35859604 PMCID: PMC9289184 DOI: 10.3389/fpsyt.2022.922720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 06/07/2022] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Attention deficit hyperactivity disorder (ADHD) is one of the most prevalent childhood-onset neurodevelopmental disorders; however, the underlying neural mechanisms for the inattention symptom remain elusive for children with ADHD. At present, the majority of studies have analyzed the structural MRI (sMRI) with the univariate method, which fails to demonstrate the interregional covarying relationship of gray matter (GM) volumes among brain regions. The scaled subprofile model of principal component analysis (SSM-PCA) is a multivariate method, which can detect more robust brain-behavioral phenotype association compared to the univariate analysis method. This study aims to identify the GM network associated with attention in children with ADHD by applying SSM-PCA to the sMRI. METHODS The sMRI of 209 children with ADHD and 209 typically developing controls (TDCs) aged 7-14 years from the ADHD-200 dataset was used for anatomical computation, and the GM volume in each brain region was acquired. Then, SSM-PCA was applied to the GM volumes of all the subjects to capture the GM network of children with ADHD (i.e., ADHD-related pattern). The relationship between the expression of ADHD-related pattern and inattention symptom was further investigated. Finally, the influence of sample size on the analysis of this study was explored. RESULTS The ADHD-related pattern mainly included putamen, pallium, caudate, thalamus, right accumbens, superior/middle/inferior frontal cortex, superior occipital cortex, superior parietal cortex, and left middle occipital cortex. In addition, the expression of the ADHD-related pattern was related to inattention scores measured by the Conners' Parent Rating Scale long version (CPRS-LV; r = 0.25, p = 0.0004) and the DuPaul ADHD Rating Scale IV (ADHD-RS; r = 0.18, p = 0.03). Finally, we found that when the sample size was 252, the results of ADHD-related pattern were relatively reliable. Similarly, the sample size needed to be 162 when exploring the relationship between ADHD-related pattern and behavioral indicator measured by CPRS-LV. CONCLUSION We captured a GM network associated with attention in children with ADHD, which is different from that in adolescents and adults with ADHD. Our findings may shed light on the diverse neural mechanisms of inattention and provide treatment targets for children with ADHD.
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Affiliation(s)
- Xing-Ke Wang
- Jing Hengyi School of Education, Hangzhou Normal University, Hangzhou, China.,Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
| | - Xiu-Qin Wang
- Jing Hengyi School of Education, Hangzhou Normal University, Hangzhou, China.,Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China.,TMS Center, Deqing Hospital of Hangzhou Normal University, Zhejiang, China
| | - Xue Yang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China.,TMS Center, Deqing Hospital of Hangzhou Normal University, Zhejiang, China
| | - Li-Xia Yuan
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China.,TMS Center, Deqing Hospital of Hangzhou Normal University, Zhejiang, China.,Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou Normal University, Hangzhou, China
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13
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Xia T, Liu CS, Hu YN, Luo ZY, Chen FL, Yuan LX, Tan XM. Coix seed polysaccharides alleviate type 2 diabetes mellitus via gut microbiota-derived short-chain fatty acids activation of IGF1/PI3K/AKT signaling. Food Res Int 2021; 150:110717. [PMID: 34865748 DOI: 10.1016/j.foodres.2021.110717] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 09/01/2021] [Accepted: 09/13/2021] [Indexed: 02/07/2023]
Abstract
Type 2 diabetes mellitus (T2DM) has become a worldwide concern in recent years. Coix seed (CS) as a homologous substance of traditional Chinese medicine and food, its polysaccharides can improve the symptoms of patients with metabolic disorders. Since most plant polysaccharides are difficult to digest and absorb, we hypothesized that Coix seed polysaccharides (CSP) exert hypoglycemic effects through the gut. In this study, the underlying mechanisms regulating hypoglycemic effects of CSP on a T2DM mouse model were investigated. After treatment with CSP, serum insulin and high-density lipoprotein cholesterol levels were increased, while total cholesterol, triglycerides and low-density lipoprotein cholesterol levels were decreased in T2DM mice. In addition, CSP treatment helped repair the intestinal barrier and modulated the gut microbial composition in T2DM mice, mainly facilitating the growth of short-chain fatty acid (SCFA)-producing bacteria, Spearman's analysis revealed these bacteria were positively related with the hypoglycemic efficacy of CSP. Colonic transcriptome analysis indicated the hypoglycemic effect of CSP was associated with the activation of the IGF1/PI3K/AKT signaling pathway. Correlative analysis revealed that this activation may result from the increase of SCFAs-producing bacteria by CSP. GC-MS detection verified that CSP treatment increased fecal SCFAs levels. Molecular docking revealed that SCFAs could bind with IGF1, PI3K, and AKT. Our findings demonstrated that CSP treatment modulates gut microbial composition, especially of the SCFAs-producing bacteria, activates the IGF1/PI3K/AKT signaling pathways, and exhibits hypoglycemic efficacy.
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Affiliation(s)
- Ting Xia
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China
| | - Chang-Shun Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China
| | - Yan-Nan Hu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China
| | - Zhen-Ye Luo
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China
| | - Fei-Long Chen
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China
| | - Li-Xia Yuan
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China.
| | - Xiao-Mei Tan
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Southern Medical University, Guangzhou 510515, PR China; Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology, Guangzhou 510515, PR China.
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14
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Lou TL, Ji T, Peng X, Ji WW, Yuan LX, Wang J, Li SM, Zhang S, Shi QY. Extract From Tetrastigma hemsleyanum Leaf Alleviates Pseudomonas aeruginosa Lung Infection: Network Pharmacology Analysis and Experimental Evidence. Front Pharmacol 2021; 12:587850. [PMID: 34349638 PMCID: PMC8326761 DOI: 10.3389/fphar.2021.587850] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 06/21/2021] [Indexed: 01/22/2023] Open
Abstract
Tetrastigma hemsleyanum Diels & Gilg (T. hemsleyanum) has attracted much attention due to its ability on pneumonia, bronchitis, and immune-related diseases, while its functional components and underlying mechanism of action on pneumonia have not been fully elucidated. Herein, we used a systematic network pharmacology approach to explore the action mechanism of T. hemsleyanum leaf in the treatment of pneumonia. In this study, the results of network pharmacology demonstrated that there were 34 active components and 80 drug-disease targets in T. hemsleyanum leaf, which were strongly in connection with signal transduction, inflammatory response, and the oxidation-reduction process. Subsequently, a mouse model of pneumonia induced by Pseudomonas aeruginosa (P. aeruginosa) was established to validate the predicted results of network pharmacology. In the animal experiments, aqueous extract of T. hemsleyanum leaf (EFT) significantly attenuated the histopathological changes of lung tissue in P. aeruginosa-induced mice and reduced the number of bacterial colonies in BALFs by 96.84% (p < 0.01). Moreover, EFT treatment suppressed the increase of pro-inflammatory cytokines IL-17, IL-6, and TNF-α in lung tissues triggered by P. aeruginosa, which led to the increase of Th17 cells (p < 0.05). High concentration of EFT treatment (2.0 g/kg) obviously increased the anti-inflammatory cytokine levels, accompanied by the enhancement of Treg proportion in a dose-dependent manner and a notable reversal of transcription factor RORγt expression. These findings demonstrated that network pharmacology was a useful tool for TCM research, and the anti-inflammatory effect of EFT was achieved by maintaining Th17/Treg immune homeostasis and thereby suppressing the inflammatory immune response.
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Affiliation(s)
| | - Tao Ji
- Zhejiang Pharmaceutical College, Ningbo, China
| | - Xin Peng
- Food and Health Branch, Ningbo Research Institute of Zhejiang University, Ningbo, China
| | - Wei-Wei Ji
- Zhejiang Pharmaceutical College, Ningbo, China
| | - Li-Xia Yuan
- Zhejiang Pharmaceutical College, Ningbo, China
| | - Juan Wang
- Zhejiang Pharmaceutical College, Ningbo, China
| | - Shi-Min Li
- Zhejiang Pharmaceutical College, Ningbo, China
| | - Shun Zhang
- Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, China
| | - Qiao-Yun Shi
- Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, China
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15
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Xia SB, Song C, Zhang L, Pei YF, Yuan LX, Li HY, Mao HJ, Lu QS. [Efficacy of endovascular treatment of distal aortic dissection involving abdominal visceral segment with bare-metal stents related technique]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:380-386. [PMID: 33874689 DOI: 10.3760/cma.j.cn112148-20210301-00184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect of bare-metal stent related technique on distal aortic dissection involving abdominal visceral segment. Methods: A retrospective analysis was performed on clinical data of 33 patients with distal aortic dissection involved abdominal visceral segment, who hospitalized in the Vascular Surgery Department of Shanghai Changhai Hospital from July 2012 to September 2019. The effect of the treatment was evaluated according to the clinical and preoperative, intraoperative and follow-up imaging data derived from (aorta computed tomography angiography (CTA) and digital subtraction angiography (DSA)) as well as the changes of the maximal diameter of the aorta and the thrombosis of the false lumen of the dissection. The criteria were as follows: the maximum diameter change of aortic dissection<5 mm was defined as stable; the maximum diameter decrease of aortic dissection≥5 mm was defined as effective reduction; the maximum diameter increase of aortic dissection≥5 mm was defined as expansion; the definition of diameter change of false lumen was the same as above. The hospital complications, clinical symptoms and survival were recorded. Results: There were 28 male patients in this cohort, the mean age was (57.6±4.9) years old. Twenty-one patients were treated with bare-metal stent and coils technique, of which 8 patients were jointly treated with stent grafts. Twelve patients were treated with multi-layer bare-metal stent technique, of which 4 patients were jointly treated with stent grafts. Intraoperative DSA image results showed that the visceral arteries were patent during the treatment, and the blood flow velocity of the false lumen was reduced in all 33 patients. There were no adverse events such as distal outflow tract embolism and coil displacement during the operation. During the period of hospitalization, one patient developed intimal rupture of subrenal abdominal aortic dissection on the fourth day after operation and emergency endovascular graft exclusion was performed for abdominal aortic dissection, and the patient recovered well from the emergency operation. The follow-up time was (16.7±14.0) months. One patient died 1 year after surgery due to non-disease-related factors. Follow-up CTA imaging results showed that the maximum diameter of the aorta in abdominal visceral segment tended to be smaller ((39.1±13.4) mm vs. (41.3±11.9) mm, P=0.469), and the maximum diameter of the false lumen was significantly reduced ((16.2±12.9) mm vs. (23.5±10.7) mm, P=0.014). The maximum diameter of the aortic dissection was reduced in 12 cases, stable in 19 cases, expanded in 2 cases. The maximum diameter of the false lumen was effectively reduced in 22 cases, stable in 10 cases, and expanded in 1 case. Four patients developed small endoleak in the false lumen, one of them was nearby the renal artery stent, and the remaining patients experienced complete thrombosis of the false lumen. Conclusions: Endovascular treatment of distal aortic dissection involving abdominal visceral segment with bare-metal stents related technique could promote the shrink and the thrombosis of the false lumen, and slow down the blood flow from the tear into the false lumen in the setting of patency of visceral arteries.
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Affiliation(s)
- S B Xia
- Department of Vascular Surgery, Changhai Hospital, Navy Medical University, Shanghai 200433, China
| | - C Song
- Department of Vascular Surgery, Changhai Hospital, Navy Medical University, Shanghai 200433, China
| | - L Zhang
- Department of Vascular Surgery, Changhai Hospital, Navy Medical University, Shanghai 200433, China
| | - Y F Pei
- Department of Vascular Surgery, Changhai Hospital, Navy Medical University, Shanghai 200433, China
| | - L X Yuan
- Department of Vascular Surgery, Changhai Hospital, Navy Medical University, Shanghai 200433, China
| | - H Y Li
- Department of Vascular Surgery, Changhai Hospital, Navy Medical University, Shanghai 200433, China
| | - H J Mao
- Department of Vascular Surgery, Changhai Hospital, Navy Medical University, Shanghai 200433, China
| | - Q S Lu
- Department of Vascular Surgery, Changhai Hospital, Navy Medical University, Shanghai 200433, China
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16
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Yuan LX, Zhao N, Wang XQ, Lv YT, He H. Echo Time Dependency of Local Activity Metrics of Resting-State Functional MRI. Front Neurosci 2021; 15:619412. [PMID: 33796007 PMCID: PMC8008056 DOI: 10.3389/fnins.2021.619412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 02/08/2021] [Indexed: 11/23/2022] Open
Abstract
Local activity metrics of resting-state functional MRI (RS-fMRI), such as the amplitude of low-frequency fluctuation (ALFF), fractional ALFF (fALFF), regional homogeneity (ReHo), and degree centrality (DC), are widely used to detect brain abnormalities based on signal fluctuations. Although signal changes with echo time (TE) have been widely studied, the effect of TE on local activity metrics has not been investigated. RS-fMRI datasets from 12 healthy subjects with eyes open (EO) and eyes closed (EC) were obtained with a four-echo gradient-echo-planar imaging pulse sequence with the following parameters: repetition time/TE1/TE2/TE3/TE4 = 2,000/13/30.93/48.86/66.79 ms. Six representative regions were selected for simulating the spatial feature of TE dependency of local activity metrics. Moreover, whole-brain local activity metrics were calculated from each echo dataset and compared between EO and EC conditions. Dice overlap coefficient (DOC) was then employed to calculate the overlap between the T maps. We found that all the local activity metrics displayed different TE dependency characteristics, while their overall change patterns were similar: an initial large change followed by a slow variation. The T maps for local activity metrics also varied greatly with TE. For ALFF, fALFF, ReHo, and DC, the DOCs for voxels in four TE datasets were 6.87, 0.73, 5.08, and 0.93%, respectively. Collectively, these findings demonstrate that local metrics are greatly dependent on TE. Therefore, TE should be carefully considered for the optimization of data acquisition and multi-center data analysis in RS-fMRI.
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Affiliation(s)
- Li-Xia Yuan
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China.,Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Na Zhao
- Unit of Psychiatry, Faculty of Health Sciences, Center for Cognition and Brain Sciences, Institute of Translational Medicine, University of Macau, Macao, China
| | - Xiu-Qin Wang
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China.,Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Ya-Ting Lv
- Center for Cognition and Brain Disorders, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China.,Institute of Psychological Sciences, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Hongjian He
- Center for Brain Imaging Science and Technology, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China
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17
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Xie BP, Chai JW, Fan C, Ouyang JH, Duan WJ, Sun B, Chen J, Yuan LX, Xu XQ, Chen JX. Water-Stable Silver-Based Metal-Organic Frameworks of Quaternized Carboxylates and Their Antimicrobial Activity. ACS Appl Bio Mater 2020. [PMID: 35019622 DOI: 10.1021/acsabm.0c00896/suppl_file/mt0c00896_si_003.pdf] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/23/2023]
Abstract
Three-dimensional (3D) and two-dimensional (2D) Ag-based zwitterionic metal-organic frameworks (MOFs) [Ag2(Cedcp)]n (1, 3D, H3CedcpBr denotes N-(carboxyethyl)-(3,5-dicarboxyl)-pyridinium bromide) and {[Ag4(Cmdcp)2(H2O)4]·4H2O}n (2, 2D, H3CmdcpBr denotes N-(carboxymethyl)-(3,5-dicarboxyl)-pyridinium bromide) have been prepared and investigated for antimicrobial activity via minimal inhibition concentration (MIC) test and killing kinetic assay. Both MOFs 1 and 2 show good water stability and solubility ascribed to their characteristic aromatic rings and positively charged pyridinium of the ligands, as well as the presence of Ag+ on their surface, leading to strong antimicrobial activity and a wide antimicrobial spectrum toward Gram-negative and positive bacteria. The results indicated that MOF 2 possesses a faster antibacterial activity (60 min) than MOF 1 (120 min). Scanning electron microscopy analysis further suggests that the Ag-based MOFs are capable of rupturing the bacterial membrane, leading to cell death. Moreover, both MOFs exhibit little hemolytic activity against mouse erythrocytes and show good biocompatibility in vitro, rendering MOFs 1 and 2 potential therapeutic agents for diseases caused by bacteria.
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Affiliation(s)
- Bao-Ping Xie
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jin-Wei Chai
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Cheng Fan
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Ji-Hua Ouyang
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Wen-Jun Duan
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Bin Sun
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jun Chen
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Li-Xia Yuan
- School of Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Xue-Qing Xu
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jin-Xiang Chen
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
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18
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Xie BP, Chai JW, Fan C, Ouyang JH, Duan WJ, Sun B, Chen J, Yuan LX, Xu XQ, Chen JX. Water-Stable Silver-Based Metal-Organic Frameworks of Quaternized Carboxylates and Their Antimicrobial Activity. ACS Appl Bio Mater 2020; 3:8525-8531. [PMID: 35019622 DOI: 10.1021/acsabm.0c00896] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Three-dimensional (3D) and two-dimensional (2D) Ag-based zwitterionic metal-organic frameworks (MOFs) [Ag2(Cedcp)]n (1, 3D, H3CedcpBr denotes N-(carboxyethyl)-(3,5-dicarboxyl)-pyridinium bromide) and {[Ag4(Cmdcp)2(H2O)4]·4H2O}n (2, 2D, H3CmdcpBr denotes N-(carboxymethyl)-(3,5-dicarboxyl)-pyridinium bromide) have been prepared and investigated for antimicrobial activity via minimal inhibition concentration (MIC) test and killing kinetic assay. Both MOFs 1 and 2 show good water stability and solubility ascribed to their characteristic aromatic rings and positively charged pyridinium of the ligands, as well as the presence of Ag+ on their surface, leading to strong antimicrobial activity and a wide antimicrobial spectrum toward Gram-negative and positive bacteria. The results indicated that MOF 2 possesses a faster antibacterial activity (60 min) than MOF 1 (120 min). Scanning electron microscopy analysis further suggests that the Ag-based MOFs are capable of rupturing the bacterial membrane, leading to cell death. Moreover, both MOFs exhibit little hemolytic activity against mouse erythrocytes and show good biocompatibility in vitro, rendering MOFs 1 and 2 potential therapeutic agents for diseases caused by bacteria.
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Affiliation(s)
- Bao-Ping Xie
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jin-Wei Chai
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Cheng Fan
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Ji-Hua Ouyang
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Wen-Jun Duan
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Bin Sun
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jun Chen
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Li-Xia Yuan
- School of Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Xue-Qing Xu
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Jin-Xiang Chen
- Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China
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Qiu HJ, Yuan LX, Huang XK, Zhou YQ, Wu QW, Zheng R, Yang QT. [Using the big data of internet to understand the characteristics of coronavirus disease 2019: a big data study]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2020; 55:569-575. [PMID: 32186171 DOI: 10.3760/cma.j.cn115330-20200225-00128] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the symptom characteristics of Coronavirus Disease 2019(COVID-19) and to improve its prevention by using big data. Methods: Using Baidu Index Platform (http://index.baidu.com) and the website of Chinese Center for Disease Control and Prevention as data resources, we obtained the search volume (SV) of keywords for symptoms associated with COVID-19 from January 1 to February 20 in each year from 2017 to 2020, in Hubei province and other top 10 impacted provinces in China and the epidemic data. Data of 2020 were compared with the previous three years. Data of Hubei province were compared with confirmed cases. The differences and characteristics of the SV of COVID-19-related symptoms, and the correlation between the SV of COVID-19 and new confirmed or suspected cases were analyzed and the hysteresis effects were discussed. R3.6.2 software was used to analyze the data. Results: Compared the data from January 1 to February 20, 2020, with the SV for the same period of previous three years, Hubei's SV for cough, fever, diarrhea, chest tightness, dyspnea and other symptoms were significantly increased. The total SV of lower respiratory symptoms was significantly higher than that of upper respiratory symptoms (P<0.001). The SV of COVID-19 in Hubei province was significantly correlated with new confirmed or suspected cases (r(confirmed)=0.723, r(suspected)=0.863, all P<0.001). The results of the distributed lag model suggested that the patients who retrieved relevant symptoms on the internet may begin to see a doctor in 2-3 days later and be diagnosed in 3-4 days later. Conclusions: The total SV of lower respiratory symptoms is higher than that of upper respiratory symptoms, and the SV of diarrhea also increases significantly. It warns us to pay attention to not only the symptoms of lower respiratory tract, but also the gastrointestinal symptoms, especially diarrhea in patients with COVID-19. There is a relationship between internet retrieval behavior and the number of new confirmed or suspected cases. Big data have a certain role in the early warning of infectious diseases.
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Affiliation(s)
- H J Qiu
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - L X Yuan
- Department of Science and Research, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - X K Huang
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Y Q Zhou
- Department of Pulmonary and Critical Care Medicine, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Q W Wu
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - R Zheng
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Q T Yang
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
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20
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Feng BM, Han XL, Li YT, Yuan LX, Sun YC, Tang L. [Preliminary study of dihydroartemisin in inhibiting invasion and metastasis of hepatoma cells]. Zhongguo Zhong Yao Za Zhi 2020; 45:683-688. [PMID: 32237529 DOI: 10.19540/j.cnki.cjcmm.20191105.402] [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] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
It is reported that dihydroartemisinin could reduce the expression of phosphorylated adhesion kinase and matrix metalloproteinase-2, inhibit the growth, migration and invasion of ovarian cancer cells, promote the formation of Treg cells through TGF-beta/Smad signaling pathway, and play an immunosuppressive role; dihydroartemisinin could also inhibit the growth of lung cancer cells by inhibiting the expression of vascular endothelial growth factor(VEGF) receptor KDR. However, there are few studies on dihydroartemisinin in hepatocellular carcinoma cells. In order to preliminarily explore the effect of dihydroartemisinin on invasion and metastasis of hepatocellular carcinoma cells, CCK-8 method and crystal violet staining were used to detect the effect of dihydroartemisinin on the growth of hepatocellular carcinoma cell 7402 and highly metastatic hepatocellular carcinoma cell MHCC97 H. The effects of dihydroartemisinin on the invasion and metastasis of hepatocellular carcinoma cell 7402 and highly metastatic hepatocellular carcinoma cell MHCC97 H were studied by using cell wound healing and Transwell. Western blot was used to detect the protein expression of epidermal growth factor receptor(EGFR) and its downstream signaling pathway in cells treated with dihydroartemisinin for 48 hours. The results showed that dihydroartemisinin could inhibit the growth of hepatocellular carcinoma cell 7402 and highly metastatic hepatocellular carcinoma cell MHCC97 H at 25 μmol·L~(-1). As compared with the control group, the number of cell clones was significantly reduced, and the ability of cell migration and invasion was weakened. Western blot results showed that as compared with the control group, dihydroartemisinin group could down-regulate the protein expression of EGFR and its downstream signaling pathways p-AKT, p-ERK, N-cadherin, Snail and Slug, and up-regulate the expression of E-cadherin protein, thus affecting the migration, invasion and metastasis of hepatocellular carcinoma cells 7402 and MHCC97 H.
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Affiliation(s)
- Bao-Min Feng
- College of Life Science and Technology, Dalian University Dalian 116622, China
| | - Xin-Long Han
- College of Life Science and Technology, Dalian University Dalian 116622, China College of Traditional Chinese Medicine, Southern Medical University Guangzhou 510515, China
| | - Yu-Tong Li
- College of Life Science and Technology, Dalian University Dalian 116622, China College of Traditional Chinese Medicine, Southern Medical University Guangzhou 510515, China
| | - Li-Xia Yuan
- College of Traditional Chinese Medicine, Southern Medical University Guangzhou 510515, China
| | - Ying-Chao Sun
- Dalian Sanyi Animal Medicine Company Dalian 116036, China
| | - Ling Tang
- College of Traditional Chinese Medicine, Southern Medical University Guangzhou 510515, China Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Guangdong Provincial Engineering Laboratory of Chinese Medicine Preparation Technology Guangzhou 510515, China
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21
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Luo FF, Wang JB, Yuan LX, Zhou ZW, Xu H, Ma SH, Zang YF, Zhang M. Higher Sensitivity and Reproducibility of Wavelet-Based Amplitude of Resting-State fMRI. Front Neurosci 2020; 14:224. [PMID: 32300288 PMCID: PMC7145399 DOI: 10.3389/fnins.2020.00224] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 03/02/2020] [Indexed: 01/26/2023] Open
Abstract
The fast Fourier transform (FFT) is a widely used algorithm used to depict the amplitude of low-frequency fluctuation (ALFF) of resting-state functional magnetic resonance imaging (RS-fMRI). Wavelet transform (WT) is more effective in representing the complex waveform due to its adaptivity to non-stationary or local features of data and many varieties of wavelet functions with different shapes being available. However, there is a paucity of RS-fMRI studies that systematically compare between the results of FFT versus WT. The present study employed five cohorts of datasets and compared the sensitivity and reproducibility of FFT-ALFF with those of Wavelet-ALFF based on five mother wavelets (namely, db2, bior4.4, morl, meyr, and sym3). In addition to the conventional frequency band of 0.0117-0.0781 Hz, a comparison was performed in sub-bands, namely, Slow-6 (0-0.0117 Hz), Slow-5 (0.0117-0.0273 Hz), Slow-4 (0.0273-0.0742 Hz), Slow-3 (0.0742-0.1992 Hz), and Slow-2 (0.1992-0.25 Hz). The results indicated that the Wavelet-ALFF of all five mother wavelets was generally more sensitive and reproducible than FFT-ALFF in all frequency bands. Specifically, in the higher frequency band Slow-2 (0.1992-0.25 Hz), the mean sensitivity of db2-ALFF results was 1.54 times that of FFT-ALFF, and the reproducibility of db2-ALFF results was 2.95 times that of FFT-ALFF. The findings suggest that wavelet-ALFF can replace FFT-ALFF, especially in the higher frequency band. Future studies should test more mother wavelets on other RS-fMRI metrics and multiple datasets.
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Affiliation(s)
- Fei-Fei Luo
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Institute of Biomedical Engineering, School of Life Sciences and Technology, Xi'an Jiaotong University, Xi'an, China.,Department of Medical Imaging, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Jian-Bao Wang
- Institutes of Psychological Sciences, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China.,Center for Cognition and Brain Disorders, The Affiliated Hospital, Hangzhou Normal University, Hangzhou, China
| | - Li-Xia Yuan
- Institutes of Psychological Sciences, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China.,Center for Cognition and Brain Disorders, The Affiliated Hospital, Hangzhou Normal University, Hangzhou, China
| | - Zhi-Wei Zhou
- Institutes of Psychological Sciences, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China.,Center for Cognition and Brain Disorders, The Affiliated Hospital, Hangzhou Normal University, Hangzhou, China
| | - Hui Xu
- Department of Medical Imaging, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Shao-Hui Ma
- Department of Medical Imaging, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Yu-Feng Zang
- Institutes of Psychological Sciences, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China.,Center for Cognition and Brain Disorders, The Affiliated Hospital, Hangzhou Normal University, Hangzhou, China
| | - Ming Zhang
- Department of Medical Imaging, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
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22
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Zhao N, Yuan LX, Jia XZ, Zhou XF, Deng XP, He HJ, Zhong J, Wang J, Zang YF. Intra- and Inter-Scanner Reliability of Voxel-Wise Whole-Brain Analytic Metrics for Resting State fMRI. Front Neuroinform 2018; 12:54. [PMID: 30186131 PMCID: PMC6110941 DOI: 10.3389/fninf.2018.00054] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 08/03/2018] [Indexed: 01/01/2023] Open
Abstract
As the multi-center studies with resting-state functional magnetic resonance imaging (RS-fMRI) have been more and more applied to neuropsychiatric studies, both intra- and inter-scanner reliability of RS-fMRI are becoming increasingly important. The amplitude of low frequency fluctuation (ALFF), regional homogeneity (ReHo), and degree centrality (DC) are 3 main RS-fMRI metrics in a way of voxel-wise whole-brain (VWWB) analysis. Although the intra-scanner reliability (i.e., test-retest reliability) of these metrics has been widely investigated, few studies has investigated their inter-scanner reliability. In the current study, 21 healthy young subjects were enrolled and scanned with blood oxygenation level dependent (BOLD) RS-fMRI in 3 visits (V1 - V3), with V1 and V2 scanned on a GE MR750 scanner and V3 on a Siemens Prisma. RS-fMRI data were collected under two conditions, eyes open (EO) and eyes closed (EC), each lasting 8 minutes. We firstly evaluated the intra- and inter-scanner reliability of ALFF, ReHo, and DC. Secondly, we measured systematic difference between two scanning visits of the same scanner as well as between two scanners. Thirdly, to account for the potential difference of intra- and inter-scanner local magnetic field inhomogeneity, we measured the difference of relative BOLD signal intensity to the mean BOLD signal intensity of the whole brain between each pair of visits. Last, we used percent amplitude of fluctuation (PerAF) to correct the difference induced by relative BOLD signal intensity. The inter-scanner reliability was much worse than intra-scanner reliability; Among the VWWB metrics, DC showed the worst (both for intra-scanner and inter-scanner comparisons). PerAF showed similar intra-scanner reliability with ALFF and the best reliability among all the 4 metrics. PerAF reduced the influence of BOLD signal intensity and hence increase the inter-scanner reliability of ALFF. For multi-center studies, inter-scanner reliability should be taken into account.
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Affiliation(s)
- Na Zhao
- Center for Cognition and Brain Disorders, Institutes of Psychological Sciences, Hangzhou Normal University, Hangzhou, China
- Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Li-Xia Yuan
- Center for Brain Imaging Science and Technology, Key Laboratory for Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China
| | - Xi-Ze Jia
- Center for Cognition and Brain Disorders, Institutes of Psychological Sciences, Hangzhou Normal University, Hangzhou, China
- Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Xu-Feng Zhou
- Center for Cognition and Brain Disorders, Institutes of Psychological Sciences, Hangzhou Normal University, Hangzhou, China
- Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Xin-Ping Deng
- Center for Cognition and Brain Disorders, Institutes of Psychological Sciences, Hangzhou Normal University, Hangzhou, China
- Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Hong-Jian He
- Center for Brain Imaging Science and Technology, Key Laboratory for Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China
| | - Jianhui Zhong
- Center for Brain Imaging Science and Technology, Key Laboratory for Biomedical Engineering of Ministry of Education, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China
| | - Jue Wang
- Center for Cognition and Brain Disorders, Institutes of Psychological Sciences, Hangzhou Normal University, Hangzhou, China
- Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
| | - Yu-Feng Zang
- Center for Cognition and Brain Disorders, Institutes of Psychological Sciences, Hangzhou Normal University, Hangzhou, China
- Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China
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23
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Yuan LX, Wang JB, Zhao N, Li YY, Ma Y, Liu DQ, He HJ, Zhong JH, Zang YF. Intra- and Inter-scanner Reliability of Scaled Subprofile Model of Principal Component Analysis on ALFF in Resting-State fMRI Under Eyes Open and Closed Conditions. Front Neurosci 2018; 12:311. [PMID: 29887795 PMCID: PMC5981094 DOI: 10.3389/fnins.2018.00311] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 04/23/2018] [Indexed: 02/04/2023] Open
Abstract
Scaled Subprofile Model of Principal Component Analysis (SSM-PCA) is a multivariate statistical method and has been widely used in Positron Emission Tomography (PET). Recently, SSM-PCA has been applied to discriminate patients with Parkinson's disease and healthy controls with Amplitude of Low Frequency Fluctuation (ALFF) from Resting-State Functional Magnetic Resonance Imaging (RS-fMRI). As RS-fMRI scans are more readily available than PET scans, it is important to investigate the intra- and inter-scanner reliability of SSM-PCA in RS-fMRI. A RS-fMRI dataset with Eyes Open (EO) and Eyes Closed (EC) conditions was obtained in 21 healthy subjects (21.8 ± 1.8 years old, 11 females) on 3 visits (V1, V2, and V3), with V1 and V2 (mean interval of 14 days apart) on one scanner and V3 (about 8 months from V2) on a different scanner. To simulate between-group analysis in conventional SSM-PCA studies, 21 subjects were randomly divided into two groups, i.e., EC-EO group (EC ALFF map minus EO ALFF map, n = 11) and EO-EC group (n = 10). A series of covariance patterns and their expressions were derived for each visit. Only the expression of the first pattern showed significant differences between the two groups for all the visits (p = 0.012, 0.0044, and 0.00062 for V1, V2, and V3, respectively). This pattern, referred to as EOEC-pattern, mainly involved the sensorimotor cortex, superior temporal gyrus, frontal pole, and visual cortex. EOEC-pattern's expression showed fair intra-scanner reliability (ICC = 0.49) and good inter-scanner reliability (ICC = 0.65 for V1 vs. V2 and ICC = 0.66 for V2 vs. V3). While the EOEC-pattern was similar with the pattern of conventional unpaired T-test map, the two patterns also showed method-specific regions, indicating that SSM-PCA and conventional T-test are complementary for neuroimaging studies.
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Affiliation(s)
- Li-Xia Yuan
- Key Laboratory for Biomedical Engineering of Ministry of Education, Center for Brain Imaging Science and Technology, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China
| | - Jian-Bao Wang
- Center for Cognition and Brain Disorders and the Affiliated Hospital, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China.,Institutes of Psychological Sciences, College of Education, Hangzhou Normal University, Hangzhou, China
| | - Na Zhao
- Center for Cognition and Brain Disorders and the Affiliated Hospital, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China.,Institutes of Psychological Sciences, College of Education, Hangzhou Normal University, Hangzhou, China
| | - Yuan-Yuan Li
- Center for Cognition and Brain Disorders and the Affiliated Hospital, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China.,Institutes of Psychological Sciences, College of Education, Hangzhou Normal University, Hangzhou, China
| | - Yilong Ma
- Center for Neurosciences, The Feinstein Institute for Medical Research, Manhasset, NY, United States
| | - Dong-Qiang Liu
- Research Center of Brain and Cognitive Neuroscience, Liaoning Normal University, Dalian, China
| | - Hong-Jian He
- Key Laboratory for Biomedical Engineering of Ministry of Education, Center for Brain Imaging Science and Technology, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China
| | - Jian-Hui Zhong
- Key Laboratory for Biomedical Engineering of Ministry of Education, Center for Brain Imaging Science and Technology, College of Biomedical Engineering and Instrumental Science, Zhejiang University, Hangzhou, China
| | - Yu-Feng Zang
- Center for Cognition and Brain Disorders and the Affiliated Hospital, Hangzhou Normal University, Hangzhou, China.,Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments, Hangzhou, China.,Institutes of Psychological Sciences, College of Education, Hangzhou Normal University, Hangzhou, China
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24
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Tong QQ, Zhou YH, Chen XS, Wu JY, Wei P, Yuan LX, Yao JM. Genome shuffling and ribosome engineering of Streptomyces virginiae for improved virginiamycin production. Bioprocess Biosyst Eng 2018; 41:729-738. [DOI: 10.1007/s00449-018-1906-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 01/31/2018] [Indexed: 10/18/2022]
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25
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Meng FX, Li M, Song MZ, Yuan LX, Gong YF, Qian YX, Shi G, Wang RX. Di-2-ethylhexyl phthalate (DEHP) exposure disturbs lipid metabolism in juvenile yellow catfish Tachysurus fulvidraco. J Fish Biol 2018; 92:85-93. [PMID: 29139118 DOI: 10.1111/jfb.13493] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 10/27/2016] [Accepted: 09/27/2017] [Indexed: 06/07/2023]
Abstract
This study was conducted to determine the mechanism by which di-2-ethylhexyl phthalate (DEHP) exposure influences lipid metabolism of juvenile yellow catfish Tachysurus fulvidraco. Fish were exposed to three DEHP concentrations (0, 0·1 and 0·5 mg l-1 DEHP) for 8 weeks. Fatty acid synthase (FAS) activity significantly decreased with increasing DEHP concentrations, the highest value was in the Tween control group, whereas the lowest activities of carnitine palmitoyltransferase (CPT) and lipoprotein lipase (LPL) were in this group. The messenger (m)RNA levels of 6-phospho-gluconate dehydrogenase (6PGD), FAS and acetyl-CoA carboxylase a (ACCa) significantly increased with increasing DEHP concentration, the highest values were in the 0·5 mg l-1 DEHP group. The mRNA level of peroxisome proliferator-activated receptor γ (PPARγ) was lower in Tween control than in fish exposed to 0·1 and 0·5 mg l-1 DEHP. The highest mRNA level of ACCb was in the 0·1 mg l-1 DEHP group. These results indicate that DEHP exposure can disturb lipid metabolism at the enzymatic and mRNA levels in Pelteobagrus fulvidraco.
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Affiliation(s)
- F X Meng
- School of Marine Sciences, Ningbo University, Ningbo, 315211, China
| | - M Li
- School of Marine Sciences, Ningbo University, Ningbo, 315211, China
| | - M Z Song
- College of Marine Science, Zhejiang Ocean University, Zhoushan, 316000, China
| | - L X Yuan
- School of Marine Sciences, Ningbo University, Ningbo, 315211, China
| | - Y F Gong
- School of Marine Sciences, Ningbo University, Ningbo, 315211, China
| | - Y X Qian
- School of Marine Sciences, Ningbo University, Ningbo, 315211, China
| | - G Shi
- College of Marine Science, Zhejiang Ocean University, Zhoushan, 316000, China
| | - R X Wang
- School of Marine Sciences, Ningbo University, Ningbo, 315211, China
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He M, Yuan LX, Zhang WX, Huang YH. Porous carbon nanotubes improved sulfur composite cathode for lithium-sulfur battery. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2023-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Wei T, Huang YH, Zeng R, Yuan LX, Hu XL, Zhang WX, Jiang L, Yang JY, Zhang ZL. Evaluation of Ca3Co2O6 as cathode material for high-performance solid-oxide fuel cell. Sci Rep 2013; 3:1125. [PMID: 23350032 PMCID: PMC3553459 DOI: 10.1038/srep01125] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [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: 09/28/2012] [Accepted: 12/14/2012] [Indexed: 11/23/2022] Open
Abstract
A cobalt-based thermoelectric compound Ca3Co2O6 (CCO) has been developed as new cathode material with superior performance for intermediate-temperature (IT) solid-oxide fuel cell (SOFC). Systematic evaluation has been carried out. Measurement of thermal expansion coefficient (TEC), thermal-stress (σ) and interfacial shearing stress (τ) with the electrolyte show that CCO matches well with several commonly-used IT electrolytes. Maximum power density as high as 1.47 W cm−2 is attained at 800°C, and an additional thermoelectric voltage of 11.7 mV is detected. The superior electrochemical performance, thermoelectric effect, and comparable thermal and mechanical behaviors with the electrolytes make CCO to be a promising cathode material for SOFC.
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Affiliation(s)
- Tao Wei
- State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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He M, Yuan LX, Huang YH. Acetylene black incorporated three-dimensional porous SnS2 nanoflowers with high performance for lithium storage. RSC Adv 2013. [DOI: 10.1039/c2ra22764a] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Chen WM, Qie L, Shao QG, Yuan LX, Zhang WX, Huang YH. Controllable synthesis of hollow bipyramid β-MnO(2) and its high electrochemical performance for lithium storage. ACS Appl Mater Interfaces 2012; 4:3047-3053. [PMID: 22658801 DOI: 10.1021/am300410z] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Three types of MnO2 nanostructures, viz., α-MnO2 nanotubes, hollow β-MnO2 bipyramids, and solid β-MnO2 bipyramids, have been synthesized via a simple template-free hydrothermal method. Cyclic voltammetry and galvanostatic charge/discharge measurements demonstrate that the hollow β-MnO2 bipyramids exhibit the highest specific capacity and the best cyclability; the capacity retains 213 mAh g(-1) at a current density of 100 mA g(-1) after 150 cycles. XRD patterns of the lithiated β-MnO2 electrodes clearly show the expansion of lattice volume caused by lithiation, but the structure keeps stable during lithium insertion/extraction process. We suggest that the excellent performance for β-MnO2 can be attributed to its unique electrochemical reaction, compact tunnel-structure and hollow architecture. The hollow architecture can accommodate the volume change during charge/discharge process and improve effective diffusion paths for both lithium ions and electrons.
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Affiliation(s)
- Wei-Min Chen
- State Key Laboratory of Material Processing and Die and Mold Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology , Wuhan, Hubei 430074, China
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Qie L, Chen WM, Wang ZH, Shao QG, Li X, Yuan LX, Hu XL, Zhang WX, Huang YH. Nitrogen-doped porous carbon nanofiber webs as anodes for lithium ion batteries with a superhigh capacity and rate capability. Adv Mater 2012; 24:2047-50. [PMID: 22422374 DOI: 10.1002/adma.201104634] [Citation(s) in RCA: 639] [Impact Index Per Article: 53.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 01/23/2012] [Indexed: 05/23/2023]
Abstract
Nitrogen-doped carbon nanofiber webs (CNFWs) with high surface areas are successfully prepared by carbonization-activation of polypyrrole nanofiber webs with KOH. The as-obtained CNFWs exhibit a superhigh reversible capacity of 943 mAh g(-1) at a current density of 2 A g(-1) even after 600 cycles, which is ascribed to the novel porous nanostructure and high-level nitrogen doping.
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Affiliation(s)
- Long Qie
- State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Wang ZH, Yuan LX, Ma J, Qie L, Zhang LL, Huang YH. Electrochemical performance in Na-incorporated nonstoichiometric LiFePO4/C composites with controllable impurity phases. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2011.12.055] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Liu Y, Qiao Y, Zhang WX, Li Z, Hu XL, Yuan LX, Huang YH. Coral-like α-MnS composites with N-doped carbon as anode materials for high-performance lithium-ion batteries. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm35227c] [Citation(s) in RCA: 121] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Shao QG, Chen WM, Wang ZH, Qie L, Yuan LX, Zhang WX, Hu XL, Huang YH. SnO2-based composite coaxial nanocables with multi-walled carbon nanotube and polypyrrole as anode materials for lithium-ion batteries. Electrochem commun 2011. [DOI: 10.1016/j.elecom.2011.09.014] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Chen WM, Huang YH, Yuan LX. Self-assembly LiFePO4/polyaniline composite cathode materials with inorganic acids as dopants for lithium-ion batteries. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.06.013] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Chen WM, Qie L, Yuan LX, Xia SA, Hu XL, Zhang WX, Huang YH. Insight into the improvement of rate capability and cyclability in LiFePO4/polyaniline composite cathode. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2010.12.041] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yang YJ, Guo SJ, Ma JH, Yuan LX, Zhang JH, Guo J. Relationship of Five Anthropometric Indices and Blood Pressure in an Adult Chinese Population. Clin Exp Hypertens 2010; 32:504-10. [DOI: 10.3109/10641963.2010.496510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Yan-Jun Yang
- College of Bioengineering, Jinzhong University, Jinzhong, Shanxi, PR China
| | - Sheng-Jin Guo
- College of Bioengineering, Jinzhong University, Jinzhong, Shanxi, PR China
| | - Jian-Hua Ma
- College of Bioengineering, Jinzhong University, Jinzhong, Shanxi, PR China
| | - Li-Xia Yuan
- College of Bioengineering, Jinzhong University, Jinzhong, Shanxi, PR China
| | - Jin-Hua Zhang
- College of Bioengineering, Jinzhong University, Jinzhong, Shanxi, PR China
| | - Jun Guo
- The Affiliated Hospital, Shanxi Workers Medical College, Taiyuan, Shanxi, PR China
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Xiong X, Jiang Y, Xia S, Zhang W, Yuan L, Liu S, Huang Y. Synthesis and modification of well-ordered layered cathode oxide LiNi2/3Mn1/3O2. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s11434-010-4057-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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39
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Liu G, Lü CS, Yuan LX. [Study on electroacupuncture improving the single-foot supporting phase rate of stroke patients]. Zhongguo Zhen Jiu 2010; 30:446-448. [PMID: 20578378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
OBJECTIVE To provide biomechanics basis for acupuncture improving motor function of stroke patients. METHODS With randomized controlled trial method, 21 cases were randomly divided into a control group (n = 10) and an acupuncture group (n = 10). The control group was only treated with basic neurology therapies, and acupuncture at Shenshu (BL 23), Qihaishu (BL 24), Dachangshu (BL 25) and Pishu (BL 20) etc. were added in the acu-puncture group. After treatment for 2 weeks, the scores of Fugl-Meyer (lower limb part) and Barthel Index assessment before and after treatment were compared, and the changes of the single-foot supporting phase rate were observed. RESULTS After treatment, the scores of Fugl-Meyer (lower limb part) and Barthel Index assessment had no significant difference in the two groups as compared with those before treatment (P > 0.05), and the single-foot supporting phase rate in acupuncture group had very significant improvement as compared with both those before treatment and those in the control group (P < 0.05 and P < 0.01, respectively). CONCLUSION Acupuncture can increase the single-foot supporting phase rate of stroke patients and the biomechanics assessment is more sensitive than the rehabilitation scale assessment.
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Affiliation(s)
- Gang Liu
- Department of Acupuncture and Moxibustion, Guangdong Provincial Second Hospital of TCM, Guangzhou 510095, China
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Conforti R, Moeder CB, Tomasic G, Boulet T, Nahta R, Yuan LX, Spielmann M, Delaloge S, Michiels S, Rimm DL, Esteva FJ, Andre F. Predictive value of p27 for the benefit of adjuvant anthracycline-based chemotherapy in early breast cancer. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-6063] [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: 11/16/2022]
Abstract
Abstract
Abstract #6063
Background: p27 is a cyclin-dependent kinase (cdk) inhibitor that plays a role in cell cycle regulation. The expression of this protein, assessed by immunohistochemistry (IHC), has prognostic value for overall survival in breast cancer patients (Porter P.L., J Natl Cancer Inst., 2007). Based on this, we hypothesized that p27 could be a predictive factor for the efficacy of adjuvant anthracycline (A)-based chemotherapy in early breast cancer.
 Methods: Tumor samples from 823 patients, included at Institut Gustave Roussy (IGR) in two randomized trials comparing an A-based chemotherapy with no adjuvant treatment, were used to construct a tissue microarray. We previously reported predictive values of ER, Her2 expression and molecular subclassification using the same tissue array (Conforti R., Ann Oncol., 2007). Nuclear and cytoplasmic expression of p27 was assessed by the AQUA system. A p27 ratio of nuclear and cytoplasmic expression (p27 N/C ratio) was calculated for each tumor sample. The prognostic and predictive value of the continuous value of p27 N/C ratio was assessed by a Cox regression model adjusted for treatment, age, tumor grade, stage and ER expression (IHC) and stratified by trial.
 Results: p27 was assessable in 715 primary tumors. The p27 N/C ratio was significantly different according to the molecular subclasses (p=0.001) and was higher in Her2- versus Her2+ and in EGFR+ versus EGFR- tumors (p=0.0075 and p<0.0001 respectively). There was an almost significant interaction between p27 N/C ratio and disease-free survival in the adjusted Cox model (p=0.052). The adjusted hazard ratios (HR) of relapse or death of a unit increase in p27 N/C ratio was HR = 1.27 (95% CI = [0.58-2.81], p = 0.55) in the control arm and HR = 0.30 (95% CI = [0.12-0.77], p= 0.01) in the A-arm. For overall survival, the adjusted interaction p-value was equal to 0.08. The adjusted HR of death of a unit increase in p27 N/C ratio was HR=1.67 (95% CI = [0.61-1.73], p=0.32) in the control arm and HR=0.32 (95% CI = [0.10-0.99], p=0.05) in the A-arm.
 Conclusion: p27 N/C ratio, determined by the AQUA system, was borderline predictive for the efficacy of adjuvant A-based chemotherapy. However, this study is hampered by a relatively low number of events, a low dose of anthracycline, and multi-hypotheses testing (overall 20 biomarkers tested in different studies).
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 6063.
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Affiliation(s)
- R Conforti
- 1 Insitut Gustave Roussy, Villejuif, France
| | - CB Moeder
- 2 Yale University School of Medicine, New Haven
| | - G Tomasic
- 1 Insitut Gustave Roussy, Villejuif, France
| | - T Boulet
- 1 Insitut Gustave Roussy, Villejuif, France
| | - R Nahta
- 3 MD Anderson Cancer Center, Houston, TX
| | - LX Yuan
- 3 MD Anderson Cancer Center, Houston, TX
| | | | - S Delaloge
- 1 Insitut Gustave Roussy, Villejuif, France
| | - S Michiels
- 1 Insitut Gustave Roussy, Villejuif, France
| | - DL Rimm
- 2 Yale University School of Medicine, New Haven
| | - FJ Esteva
- 3 MD Anderson Cancer Center, Houston, TX
| | - F Andre
- 1 Insitut Gustave Roussy, Villejuif, France
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Liu G, Yuan LX. [Clinical observation on acupuncture combined with music for treatment of Alzheimer disease]. Zhongguo Zhen Jiu 2005; 25:390-2. [PMID: 16309080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
OBJECTIVE To find the method for increasing clinical therapeutic effect on Alzheimer disease (AD). METHODS The patients of AD meeting American NINCDS-ADRDA Criteria were randomly divided into group A and group B. The group A (n = 21) were treated with acupuncture for 10 courses, 10 sessions constituting one course; and the group B (n = 20) were treated with combination of acupuncture and music therapy. The acupuncture method was the same as the group A and the music therapy was given for 20 sessions, once every 5 days. After treatment, their effectiveness were evaluated with the Mini-Mental State Examination (MMSE) and Activities of Daily Living (ADL). RESULTS After treatment, the scores for MMSE increased significantly (P < 0.05) and the scores for ADL decreased significantly (P < 0.05) in the both groups, and the therapeutic effect in the group A was better than the group B (P < 0.05). CONCLUSION Acupuncture combined with music therapy can increase the therapeutic effect on AD.
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Affiliation(s)
- Gang Liu
- College of Acupuncture and Massage, Guangzhou University of TCM, Guangdong 510405, China.
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Abstract
Increased free radical production with depletion of the antioxidant, glutathione, is a suggested mechanism for the development of ulcer disease in patients with Helicobacter pylori. The effects of ascorbate and omeprazole as potential gut antioxidants are incompletely understood. We hypothesized that as antioxidants, ascorbate and omeprazole protect against glutathione depletion. This study was designed to determine the effects of ascorbate and omeprazole on gastric emptying and gastric antioxidant levels in a mouse model of glutathione depletion. In an acute (10-day) mouse model, glutathione depletion was induced by inhibiting the rate limiting enzyme, gamma-glutamylcysteine synthetase. Enzymatic blockade produced depletion of gastric glutathione (P < 0.05) without increasing gastric lipid hydroperoxides. Glutathione depletion was associated with accelerated liquid gastric emptying. These effects were not prevented by supplementation with ascorbate or omeprazole. Omeprazole induced increased (P < 0.05) gastric and colonic total antioxidant capacity. One of the beneficial effects of omeprazole in patients may involve increased total antioxidant capacity.
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Affiliation(s)
- Timothy R Koch
- Section of Gastroenterology, LA Johnson VA Medical Center and West Virginia University, Morgantown, West Virginia 26506, USA
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Abstract
Glutathione is a nonenzymatic antioxidant synthesized by most animal cells and is depleted in inflammatory bowel disease. The effects of glutathione depletion on intestinal histology and inhibitory neurochemicals was examined in a mouse model. Glutathione depletion in A/J mice involved inhibition of gamma-glutamylcysteine synthetase using L-buthionine-(S,R)-sulfoximine (BSO) for 10 days. Ileum and colon were obtained from saline-control mice, BSO-treated mice, and BSO-treated mice receiving ascorbate or glutathione monoethylester. Glutathione, lipid peroxides, and nicotineamide adenine dinucleotide phosphate diaphorase activity were measured by colorimetric assays. Vasoactive intestinal peptide was measured by radioimmunoassay. Glutathione depletion induced enlargement of mucosal-submucosal lymphoid aggregates without germinal centers in ileum and colon. These aggregates were prevented by supplementation with glutathione monoethylester but not ascorbate. Tissue levels of inhibitory neurochemicals were unchanged. Depletion of glutathione appears to induce enlarged lymphoid aggregates by recruitment of lymphocytes from the peripheral circulation. A component of the inflammation that develops in inflammatory bowel disease could be related to depletion of tissue levels of glutathione.
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Affiliation(s)
- T R Koch
- Section of Gastroenterology, LA Johnson VA Medical Center and West Virginia University, Morgantown 26506-9161, USA
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Abstract
It has been proposed that oxidative stress is involved in the pathophysiology of ulcerative colitis. We have reported the depletion of the nonenzymatic antioxidant, glutathione, in colon from active and inactive ulcerative colitis. The colon contains several biochemically linked antioxidant systems. We hypothesized that diminished total antioxidant capacity in active ulcerative colitis would be associated with increased colonic lipid peroxidation. This study was designed to determine total antioxidant capacity and lipid hydroperoxide levels using colon obtained at surgery from controls (N = 16; 4 females, 12 males; mean age 70 years), and active and inactive ulcerative colitis (N = 15; 3 females, 12 males; mean age 39). Total antioxidant capacity of control colon was higher in muscularis externa compared to the mucosal-submucosal layer (P < 0.05). There were no differences in colonic total antioxidant capacity or lipid hydroperoxide levels comparing control colon to inactive and active ulcerative colitis. The results did not support depletion of tissue total antioxidant capacity by free radicals. Depletion of glutathione in ulcerative colitis may be a specific disorder rather than a secondary defect attributable to global oxidative stress. Nonspecific antioxidant supplements appear unlikely to be beneficial in the treatment of ulcerative colitis.
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Affiliation(s)
- T R Koch
- Section of Gastroenterology, LA Johnson VA Medical Center, West Virginia University, Morgantown 26506-9161, USA
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Fedan JS, Millecchia LL, Johnston RA, Rengasamy A, Hubbs A, Dey RD, Yuan LX, Watson D, Goldsmith WT, Reynolds JS, Orsini L, Dortch-Carnes J, Cutler D, Frazer DG. Effect of ozone treatment on airway reactivity and epithelium-derived relaxing factor in guinea pigs. J Pharmacol Exp Ther 2000; 293:724-34. [PMID: 10869370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
Ozone (O(3)) is toxic to respiratory epithelium and causes airway inflammation and hyperreactivity. To evaluate the role of the epithelium in the development of hyperreactivity, we examined in guinea pigs the effects of inhaled O(3) (3 ppm for 1 h; 0-24 h after exposure) on 1) reactivity to inhaled methacholine (MCh), 2) reactivity of the isolated, perfused trachea (IPT) to MCh, 3) epithelium-derived relaxing factor (EpDRF)-mediated relaxations of IPT induced by mucosal hyperosmolar solutions, 4) neurogenic contraction and relaxation responses, 5) transepithelial potential difference, and 6) microscopic analysis of nitrotyrosine immunofluorescence, substance P fiber density, and tracheal morphology. At 0 h, O(3) caused hyperreactivity to inhaled MCh and mucosally but not serosally applied MCh in IPT (only in the presence of the epithelium) and a decrease in transepithelial potential difference. Inhibition of EpDRF-induced relaxation responses occurred at 2 h. All of these changes returned to control by 12 to 18 h. O(3) had no effect on neurogenic responses. Nitrotyrosine immunofluorescence appeared in the trachea at 0 h in detached epithelial cell ghosts and in intrapulmonary airways by 6 h. Substance P fiber density was elevated in smooth muscle at 0 and 18 h but not in epithelium or lamina propria of intrapulmonary and extrapulmonary bronchi. Loss of cilia and mucosubstances in the mucosa occurred at 0 h; the epithelium became markedly attenuated over 12 to 24 h. A reversible increase in epithelial permeability and a decrease in EpDRF production may contribute to O(3)-induced hyperreactivity to MCh.
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Affiliation(s)
- J S Fedan
- Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA.
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Yuan LX, Fu JH, Warburton M, Li XH, Zhang SH, Khairallah M, Liu XZ, Peng ZB, Li LC. [Comparison of genetic diversity among maize inbred lines based on RFLPs, SSRs, AFLPs and RAPDs]. Yi Chuan Xue Bao 2000; 27:725-33. [PMID: 11055126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
RFLPs, SSRs, AFLPs and RAPDs were used to detect the genetic diversity among 15 maize inbred lines. A total of 56 probe enzyme combinations, 66 SSR primers, 20 RAPD primers and 9 AFLP primer combinations were identified with polymorphism among the entries, which produced 167, 201, 180 and 87 alleles respectively. SSR markers have the highest polymorphism information content (PIC, 0.47) and AFLP markers have the lowest value (0.36), while AFLP markers possess the highest assay efficiency index (Ai, 32.4). A comparison of genetic similarity matrices revealed that the estimates of correlation coefficients based on RFLPs, SSRs, AFLPs and RAPDs were significantly correlated, but the correlation of RAPD maker data with other markers was lower. These inbred lines were classified into five groups based on four molecular markers data, which are Tangsipingtou, Luda Red Cob, Lancaster, Reid, and PN group. They are consistent with the grouping based on the available pedigree data. Based on the results, we recommend RFLPs and SSRs for genetic diversity analysis among maize germplasm.
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Affiliation(s)
- L X Yuan
- Institute of Crop Breeding and Cultivation, Chinese Academy of Agricultural Sciences, Crop Genetics and Breeding, Beijing, China
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Fedan JS, Yuan LX, Chang VC, Viola JO, Cutler D, Pettit LL. Osmotic regulation of airway reactivity by epithelium. J Pharmacol Exp Ther 1999; 289:901-10. [PMID: 10215669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
Inhalation of nonisotonic solutions can elicit pulmonary obstruction in asthmatic airways. We evaluated the hypothesis that the respiratory epithelium is involved in responses of the airways to nonisotonic solutions using the guinea pig isolated, perfused trachea preparation to restrict applied agents to the mucosal (intraluminal) or serosal (extraluminal) surface of the airway. In methacholine-contracted tracheae, intraluminally applied NaCl or KCl equipotently caused relaxation that was unaffected by the cyclo-oxygenase inhibitor, indomethacin, but was attenuated by removal of the epithelium and Na+ and Cl- channel blockers. Na+-K+-2Cl- cotransporter and nitric oxide synthase blockers caused a slight inhibition of relaxation, whereas Na+,K+-pump inhibition produced a small potentiation. Intraluminal hyperosmolar KCl and NaCl inhibited contractions in response to intra- or extraluminally applied methacholine, as well as neurogenic cholinergic contractions elicited with electric field stimulation (+/- indomethacin). Extraluminally applied NaCl and KCl elicited epithelium-dependent relaxation (which for KCl was followed by contraction). In contrast to the effects of hyperosmolarity, intraluminal hypo-osmolarity caused papaverine-inhibitable contractions (+/- epithelium). These findings suggest that the epithelium is an osmotic sensor which, through the release of epithelium-derived relaxing factor, can regulate airway diameter by modulating smooth muscle responsiveness and excitatory neurotransmission.
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Affiliation(s)
- J S Fedan
- Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia, USA.
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Fedan JS, Warner TE, Yuan LX, Robinson VA, Frazer DG. Nitric oxide synthase inhibitor and lipopolysaccharide effects on reactivity of guinea pig airways. J Pharmacol Exp Ther 1995; 272:1141-50. [PMID: 7534351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The in vivo and in vitro effects of nitric oxide (NO) synthase inhibitors and lipopolysaccharide (LPS) on reactivity of guinea pig airways were examined. In isolated, perfused tracheas from untreated animals, the NO synthase inhibitors, N omega-nitro-L-arginine methyl ester (L-NAME; 10(-4)M), NG-methyl-L-arginine (L-NMMA; 10(-4) M) and aminoguanidine (10(-4) M) had no effect or inhibited reactivity to extraluminally (EL) or intraluminally (IL) applied methacholine and histamine. L-NMMA (10(-4) M) did not appreciably contract resting or metacholine-contracted preparations (+/- 3 x 10(-4) M L-arginine) and L-arginine only weakly relaxed contracted tracheas (+/- L-NMMA). Sodium nitroprusside and S-nitroso-N-penicillamine elicited relaxant responses and were more potent extraluminally than intraluminally. Methylene blue (10(-5) M) antagonized relaxation to sodium nitroprusside. Incubation with Escherichia coli LPS (10 micrograms/ml; 30 min incubation) alone in the EL and IL baths depressed methacholine and histamine concentration-response curves. In the presence of LPS, L-NAME potentiated responses to intraluminally applied methacholine but did not affect responses to extraluminally added methacholine. Four days after i.p. injection of animals with LPS (4 mg/kg), L-NAME potentiated responses to IL methacholine, and L-arginine acquired greater relaxant activity. LPS injection increased sensitivity to intraluminally added but not extraluminally added isoproterenol. LPS given by i.p. injection or by inhalation did not affect basal specific airway resistance of conscious animals or reactivity to methacholine aerosol during a postexposure period of 6 to 72 h. NO seems to have little role in regulating reactivity of guinea pig airways to bronchoconstrictor agonists, except after in vitro or in vivo exposure to LPS. After LPS injection the in vitro changes suggestive of NO synthase induction are not associated with altered airway reactivity to inhaled methacholine.
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Affiliation(s)
- J S Fedan
- Physiology Section, National Institute for Occupational Safety and Health, Morgantown, West Virginia
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Fedan JS, Yuan LX, Belt JJ, Frazer DG. Polarized effects of amiloride and 4,4'-diisothiocyano-stilbene-2,2'-disulfonic acid on ATP-induced contraction of trachea. Eur J Pharmacol 1994; 256:51-6. [PMID: 8026562 DOI: 10.1016/0014-2999(94)90615-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Polarity in the effects of amiloride and 4,4'-diisothiocyano-stilbene-2,2'-disulfonic acid (DIDS) in the guinea-pig isolated, perfused trachea was investigated to evaluate the roles of epithelial and airway smooth muscle Na+ and Cl- channels in the development of contractile responses to ATP. The blockers were applied to the mucosal (intraluminal) perfusing solution or to the serosal (extraluminal) bath before the second of two challenges with ATP (10(-4) M), which was added to the same bath as the blocker, or to the abluminal bath. In epithelium-intact tracheas, amiloride (10(-4) M) added to the extraluminal or intraluminal bath rapidly (1 min) and extensively inhibited contractions to extraluminally applied ATP (10(-4) M). In contrast, contractions to intraluminally applied ATP (10(-4) M) were relatively resistant to extraluminal and intraluminal amiloride (10(-4) M), in terms of the degree and onset of the inhibition. DIDS (10(-4) M) present in the extraluminal or intraluminal baths caused a slowly developing elevation of baseline tone. After a 30 min incubation, extraluminal DIDS potentiated responses to extraluminally added ATP, but intraluminal DIDS inhibited contractions to ATP added to the extraluminal and intraluminal baths. In contrast to the intact tracheas where there was no difference, the second response of epithelium-denuded preparations to intraluminally administered ATP was diminished. In rubbed tracheas the response to intraluminally added ATP was inhibited further by intraluminal amiloride but was potentiated by intraluminal DIDS. The results suggest that the effects of amiloride and DIDS were polarized across the tracheal wall and involved epithelial and smooth muscle ion channels.
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Affiliation(s)
- J S Fedan
- Physiology Section, National Institute for Occupational Safety and Health, Morgantown, WV 26505
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Fedan JS, Belt JJ, Yuan LX, Frazer DG. Relaxant effects of nucleotides in guinea pig isolated, perfused trachea: lack of involvement of prostanoids, Cl- channels and adenosine. J Pharmacol Exp Ther 1993; 264:217-20. [PMID: 8380860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
In higher concentrations (> 3 x 10(-4) M) than those causing contractile responses. ATP relaxed the smooth muscle of the guinea pig perfused trachea. Here we examined the relaxant effects of nucleotides. ATP and its nonhydrolyzable congener, beta, gamma-methylene ATP (APPCP), were approximately 4- and approximately 117-fold, respectively, more potent when applied separately to the serosal (extraluminal, EL) surface compared to the mucosal (intraluminal, IL) surface of methacholine (3 x 10(-7) M; EL)-contracted tracheae. APPCP was orders of magnitude more potent than ATP in both EL and IL compartments. EL UTP did not cause relaxation; IL UTP was nearly devoid of activity. The order of EL and IL activity (APPCP >> ATP) was unusual for nucleotide-induced relaxation of smooth muscle. Relaxation to ATP was not inhibited by the Cl- channel blocker 4,4'-diisothiocyano-2,2'-stilbene disulfonate (10(-4) M) or by the cyclo-oxygenase inhibitor indomethacin (3 x 10(-6) M), in contrast to the inhibitory effects of these drugs on contraction to ATP. The adenosine receptor antagonist 8-phenyltheophylline (10(-6) M) had no effect on relaxation to ATP or APPCP. Our findings indicate that Cl- channels, prostaglandins and adenosine are not involved in relaxation to adenine nucleotides.
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Affiliation(s)
- J S Fedan
- Physiology Section, National Institute for Occupational Safety and Health, Morgantown, West Virginia
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