1
|
Zuo M, Chen W, Zhou Z. Multimodal Neuroimaging Reveals and Guides Treatment of a Middle Cerebral Artery Web. JAMA Neurol 2024; 81:79-80. [PMID: 37955912 DOI: 10.1001/jamaneurol.2023.4216] [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: 11/14/2023]
Abstract
This case report describes how neuroimaging was used to determine treatment for episodic sudden-onset weakness and numbness in the left limbs.
Collapse
Affiliation(s)
- Meng Zuo
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Wei Chen
- Department of Radiology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Zhenhua Zhou
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| |
Collapse
|
2
|
Zuo M, He Y, Chen L, Li G, Liu Q, Hou X, Huang J, Zhou L, Jiang Y, Liang D, Zhou Z. Increased Neuron-Specific Enolase Level Predicts Symptomatic Intracranial Hemorrhage in Patients with Ischemic Stroke Treated with Endovascular Treatment. World Neurosurg 2023; 180:e302-e308. [PMID: 37748735 DOI: 10.1016/j.wneu.2023.09.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 09/18/2023] [Indexed: 09/27/2023]
Abstract
BACKGROUND Neuron-specific enolase (NSE), which is a highly specific marker for neurons, could be a predictor for prognosis in patients with symptomatic intracranial hemorrhage (sICH) with acute ischemic stroke who are receiving endovascular treatment (EVT). This study aimed to investigate the relationship between NSE and sICH in patients with acute anterior circulation stroke undergoing EVT. METHODS A total of 215 consecutive patients with acute stroke treated with EVT were included. Patients with stroke and acute anterior circulation occlusion, receiving EVT treated at our hospital, were enrolled between January 2017 and August 2021. NSE level was measured on arrival at the neurology intensive care unit after EVT. The patients were divided into 2 groups according to whether sICH was present. Univariate and multivariate analyses were performed. NSE level was also incorporated into the TAG score (modified Thrombolysis in Cerebral Infarction score, Alberta Stroke Program Early CT Score, and glucose level), which was developed as a scoring system to predict sICH, and the prediction capability was compared with the TAG score alone. Causal inference was performed using the package DoWhy in Python to evaluate the causal relationship between NSE and sICH. RESULTS The area under the curve (AUC) value of NSE showed moderate accuracy, with an AUC value of 0.729 (95% confidence interval, 0.655-0.795; P < 0.001). The NSE cutoff value was set at 23.88 ng/mL. When the NSE level ≥23.88 ng/mL, the sensitivity was 58.33% and the specificity was 78.72% (P < 0.001). The AUC for the TAG + NSE score was 0.801 compared with an AUC of 0.632 for the TAG score (Z = 2.034; P = 0.042). A causal inference model using the DoWhy library shows a proportional relationship between NSE and the diagnosis of sICH. CONCLUSIONS This study is the first to show that increased NSE level is an independent predictor of sICH in patients with acute anterior circulation stroke who are undergoing endovascular treatment.
Collapse
Affiliation(s)
- Meng Zuo
- Department of Neurology, Southwest Hospital, Third Military Medical University, Army Medical University, Chongqing, China
| | - Yuxuan He
- Department of Neurology, Southwest Hospital, Third Military Medical University, Army Medical University, Chongqing, China
| | - Lin Chen
- Department of Neurology, Southwest Hospital, Third Military Medical University, Army Medical University, Chongqing, China
| | - Guangjian Li
- Department of Neurology, Southwest Hospital, Third Military Medical University, Army Medical University, Chongqing, China
| | - Qu Liu
- Department of Neurology, Southwest Hospital, Third Military Medical University, Army Medical University, Chongqing, China
| | - Xianhua Hou
- Department of Neurology, Southwest Hospital, Third Military Medical University, Army Medical University, Chongqing, China
| | - Jialu Huang
- Department of Neurology, Southwest Hospital, Third Military Medical University, Army Medical University, Chongqing, China
| | - Linke Zhou
- Department of Neurology, Southwest Hospital, Third Military Medical University, Army Medical University, Chongqing, China
| | - Ying Jiang
- Department of Neurology, Southwest Hospital, Third Military Medical University, Army Medical University, Chongqing, China
| | - Dingwen Liang
- Department of Neurology, Southwest Hospital, Third Military Medical University, Army Medical University, Chongqing, China
| | - Zhenhua Zhou
- Department of Neurology, Southwest Hospital, Third Military Medical University, Army Medical University, Chongqing, China.
| |
Collapse
|
3
|
Zhang X, Zhou T, Zhang W, Ren L, Jiang J, Hu S, Zuo M, Zhang L, Man W. Increased impact of heat domes on 2021-like heat extremes in North America under global warming. Nat Commun 2023; 14:1690. [PMID: 36973258 PMCID: PMC10042826 DOI: 10.1038/s41467-023-37309-y] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 03/09/2023] [Indexed: 03/29/2023] Open
Abstract
During summer 2021, Western North America (WNA) experienced an unprecedented heatwave with record-breaking high temperatures associated with a strong anomalous high-pressure system, i.e., a heat dome. Here, we use a flow analog method and find that the heat dome over the WNA can explain half of the magnitude of the anomalous temperature. The intensities of hot extremes associated with similar heat dome-like atmospheric circulations increase faster than background global warming in both historical change and future projection. Such relationship between hot extremes and mean temperature can be partly explained by soil moisture-atmosphere feedback. The probability of 2021-like heat extremes is projected to increase due to the background warming, the enhanced soil moisture-atmosphere feedback and the weak but still significantly increased probability of the heat dome-like circulation. The population exposure to such heat extremes will also increase. Limiting global warming to 1.5 °C instead of 2 °C (3 °C) would lead to an avoided impact of 53% (89%) of the increase in population exposure to 2021-like heat extremes under the RCP8.5-SSP5 scenario.
Collapse
Affiliation(s)
- Xing Zhang
- State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Tianjun Zhou
- State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Wenxia Zhang
- State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
| | - Liwen Ren
- China Meteorological Administration, Beijing, 100081, China
| | - Jie Jiang
- State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
| | - Shuai Hu
- State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
| | - Meng Zuo
- State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
| | - Lixia Zhang
- State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
| | - Wenmin Man
- State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
| |
Collapse
|
4
|
He Y, Zuo M, Huang J, Jiang Y, Zhou L, Li G, Chen L, Liu Q, Liang D, Wang Y, Wang L, Zhou Z. A Novel Nomogram for Predicting Malignant Cerebral Edema After Endovascular Thrombectomy in Acute Ischemic Stroke: A Retrospective Cohort Study. World Neurosurg 2023; 173:e548-e558. [PMID: 36842531 DOI: 10.1016/j.wneu.2023.02.091] [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: 02/13/2023] [Accepted: 02/20/2023] [Indexed: 02/28/2023]
Abstract
BACKGROUND Malignant cerebral edema (MCE) is a common and feared complication after endovascular thrombectomy (EVT) in acute ischemic stroke (AIS). This study aimed to establish a nomogram to predict MCE in anterior circulation large vessel occlusion stroke (LVOS) patients receiving EVT in order to guide the postoperative medical care in the acute phase. METHODS In this retrospective cohort study, 381 patients with anterior circulation LVOS receiving EVT were screened from 636 hospitalized patients with LVOS at 2 stroke medical centers. Clinical baseline data and imaging data were collected within 2-5 days of admission to the hospital. The patients were divided into 2 groups based on whether MCE occurred after EVT. Multivariate logistic regression analysis was used to evaluate the independent risk factors for MCE and to establish a nomogram. RESULTS Sixty-six patients out of 381 (17.32%) developed MCE. The independent risk factors for MCE included admission National Institutes of Health Stroke Scale (NIHSS) ≥16 (odds ratio [OR] 1.851; 95% CI 1.029-3.329; P = 0.038), ASPECT score (OR 0.621; 95% CI 0.519-0.744; P < 0.001), right hemisphere (OR 1.636; 95% CI 0.941-2.843; P = 0.079), collateral circulation (OR 0.155; 95% CI 0.074-0.324; P < 0.001), recanalization (OR 0.223; 95% CI 0.109-0.457; P < 0.001), hematocrit (OR, 0.937; 95% CI: 0.892-0.985; P =0.010), and glucose (OR 1.118; 95% CI 1.023-1.223; P = 0.036), which were adopted as parameters of the nomogram. The receiver operating characteristic curve analysis showed that the area under the curve of the nomogram in predicting MCE was 0.901(95% CI 0.848-0.940; P < 0.001). The Hosmer-Lemeshow test results were not significant (P = 0.685), demonstrating a good calibration of the nomogram. CONCLUSIONS The novel nomogram composed of admission NIHSS, ASPECT scores, right hemisphere, collateral circulation, recanalization, hematocrit, and serum glucose provide a potential predictor for MCE in patients with AIS after EVT.
Collapse
Affiliation(s)
- Yuxuan He
- Department of Neurology, School of Medicine, Chongqing University, Chongqing, China; Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Meng Zuo
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Jialu Huang
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Ying Jiang
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Linke Zhou
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Guangjian Li
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Lin Chen
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Qu Liu
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Dingwen Liang
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Yu Wang
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Li Wang
- Department of Neurology, Zigong Third People's Hospital, Zigong, Sichuang, China
| | - Zhenhua Zhou
- Department of Neurology, School of Medicine, Chongqing University, Chongqing, China; Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| |
Collapse
|
5
|
Gao W, Xie Y, Zuo M, Zhang G, Liu H. Improved genetic transformation by disarmament of type II Restriction-Modification system in Streptococcus zooepidemicus. 3 Biotech 2022; 12:192. [PMID: 35910286 PMCID: PMC9325941 DOI: 10.1007/s13205-022-03227-x] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 06/17/2022] [Indexed: 11/26/2022] Open
Abstract
Streptococcus zooepidemicus, group C Streptococci, is currently used for the industrial production of hyaluronic acid (HA). However, genetic manipulation of S. zooepidemicus is severely limited by its low transformation efficiency, which might be in part due to the Restriction-Modification (R-M) systems. The complete genome sequence of S. zooepidemicus ATCC39920 revealed the presence of two putative R-M systems, type I and type II. The putative type I R-M system is encoded by three closely linked genes: hsdR (SeseC_01315), hsdS, hsdM (SeseC_01318), and the putative type II R-M system consists of two closely linked genes: SeseC_02360 and yhdJ (SeseC_02362). Inactivation of hsdR, encoding the restriction endonuclease (REase) of the type I R-M system, showed no apparent effects on transformation efficiency, implying that disarmament of the type I R-M system alone is not sufficient for increasing transformation efficiency. However, inactivation of SeseC_02360, encoding the REase of the type II R-M system, improved transformation efficiency by 4.97 folds, indicating that type II R-M system is the major barrier that restricts genetic transformation in S. zooepidemicus. Furthermore, S. zooepidemicus strains lacking either of the two R-M systems are phenotypically indistinguishable from the wild-type in terms of cell growth and HA production. In summary, our study revealed that the type II R-M system is the main barrier to genetic transformation in S. zooepidemicus ATCC39920, and that the deletion of the type II R-M system renders S. zooepidemicus more transformable, thus facilitating metabolic engineering of this industrially important microorganism. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-022-03227-x.
Collapse
Affiliation(s)
- Weixia Gao
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457 People’s Republic of China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin University of Science and Technology, Tianjin, 300457 People’s Republic of China
| | - Yaya Xie
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457 People’s Republic of China
| | - Meng Zuo
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457 People’s Republic of China
| | - Guangtong Zhang
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457 People’s Republic of China
| | - Hao Liu
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457 People’s Republic of China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin University of Science and Technology, Tianjin, 300457 People’s Republic of China
- National Technology Innovation Center of Synthetic Biology, Tianjin, 300308 People’s Republic of China
| |
Collapse
|
6
|
Si Q, Teng Y, Liu C, Yuan W, Fan X, Zhang X, Zhang Z, Li M, Liu Q, Wang P, Yan Z, Wu B, Liu Q, Li H, Ji Y, Ran Y, Song B, Zhu S, Li H, Guan J, Zhao M, Hao Y, Wang P, Bian H, Wang N, Wang Y, Pan Y, An H, Guo R, Han C, Zhang J, Wang H, You Y, Jiang H, Liu Z, Liu J, Tao D, Piao X, Zhang J, Wang P, Yang S, Liu Z, Wei X, Han K, Shi Z, Liu A, Zhang Z, Ma C, Wang B, Zhang G, Song C, Zhang G, Yang X, Chen B, Lu B, Chen B, Zuo M, Han K, Zhang X, Cao W, Wu L, Li Q, Geng X, Zhou J, Zhong M, Wang M, Chen Y, Liu J, Wang T, Deng Y, Xu W. Stroke incidence and cognitive outcomes of intracranial atherosclerotic stenosis: study protocol for a multicenter, prospective, observational cohort study. Ann Transl Med 2022; 10:909. [PMID: 36111049 PMCID: PMC9469171 DOI: 10.21037/atm-22-3570] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/04/2022] [Indexed: 11/13/2022]
Abstract
Background Intracranial atherosclerotic stenosis (ICAS) is one of the leading causes of stroke worldwide. Current diagnostic evaluations and treatments remain insufficient to assess the vulnerability of intracranial plaques and reduce the recurrence of stroke in symptomatic ICAS. On the other hand, asymptomatic ICAS is associated with an increased risk of cognitive impairment. The pathogenesis of ICAS related cognitive decline is largely unknown. The aim of SICO-ICAS study (stroke incidence and cognitive outcomes of ICAS) is to elucidate the pathophysiology of stroke and cognitive impairment in ICAS population, comprehensively evaluating the complex interactions among life-course exposure, genomic variation, vascular risk factors, cerebrovascular burden and coexisting neurodegeneration. Methods SICO-ICAS is a multicenter, prospective, observational cohort study. We aim to recruit 3,000 patients with symptomatic or asymptomatic ICAS (>50% or occlusion) who will be followed up for ≥12 months. All participants will undergo pre-designed magnetic resonance imaging packages, blood biomarkers testing, as well as detailed cognitive domains assessment. All participants will undergo clinical visits every 6 months and telephone interviews every 3 months. The primary outcome measurement is ischemic stroke or cognitive impairment within 12 months after enrollment. Discussion This study will establish a large prospective ICAS cohort, hopefully discover new biomarkers associated with vulnerable intracranial plaques, identify subjects at high risk for incident ischemic stroke or cognitive impairment, and eventually propose a precise diagnostic and treatment strategy for ICAS population. Trial Registration Chinese Clinical Trials Register ChiCTR2200061938.
Collapse
Affiliation(s)
- Qianqian Si
- Department of Neurology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Yuming Teng
- Department of Neurology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Caiyan Liu
- Department of Neurology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Weizhuang Yuan
- Department of Neurology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Xiaoyuan Fan
- Department of Radiology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Xiaoqian Zhang
- Department of Radiology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Zongmuyu Zhang
- Department of Neurology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Mingli Li
- Department of Radiology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Qing Liu
- Department of Neurology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Peng Wang
- Center for Rehabilitation Medicine, Department of Neurology, Zhejiang Provincial People’s Hospital (Affiliated People’s Hospital, Hangzhou Medical College), Hangzhou, China
| | - Zhongrui Yan
- Department of Neurology, Jining No. 1 People’s Hospital, Jining, China
| | - Bo Wu
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, China
| | - Qiang Liu
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Hangjuan Li
- Department of Neurology, 920 Hospital of Joint Service Support Force of the People’s Liberation Army, Kunming, China
| | - Yan Ji
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yuncai Ran
- Department of Magnetic resonance, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Bo Song
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Shiguang Zhu
- Department of Neurology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Hongyan Li
- Department of Neurology, People’s Hospital of Xinjiang Uygur Autonomous Region, Xinjiang Clinical Research Center for Stroke and Neurological Rare Disease, Urumqi, China
| | - Jingxia Guan
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Manli Zhao
- Department of Encephalopathy, Weifang Traditional Chinese Medicine Hospital, Weifang, China
| | - Yonggang Hao
- Department of Neurology, Dushu Lake Hospital Affiliated to Soochow University, Suzhou, China
| | - Pengfei Wang
- Department of Neurology, Weihai Municipal Hospital, Cheeloo College of Medicine, Shandong University, Weihai, China
| | - Hong Bian
- Department of Neurology, Central Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Ningfen Wang
- Department of Neurology, Binzhou People’s Hospital, Binzhou, China
| | - Yulin Wang
- Department of Neurology, First Hospital of Qinhuangdao, Qinhuangdao, China
| | - Yuning Pan
- Department of Radiology, Ningbo First Hospital, Ningbo Hospital of Zhejiang University, Ningbo, China
| | - Hongwei An
- Department of Neurology, Liuzhou Traditional Chinese Medical Hospital, Liuzhou, China
| | - Rong Guo
- Function Department of Neurology, The People’s Hospital of China Medical University, The People’s Hospital of Liaoning Province, Shenyang, China
| | - Cong Han
- Department of Neurosurgery, The Fifth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Junshi Zhang
- Department of Neurology, Huaihe Hospital of Henan University, Kaifeng, China
| | - Hebo Wang
- Department of Neurology, Hebei General Hospital, Shijiazhuang, China
| | - Yong You
- Department of Neurology, The Second Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Hongquan Jiang
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Zifan Liu
- Department of Neurology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jingli Liu
- Department of Neurology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Dingbo Tao
- Department of Neurology, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Xiangyu Piao
- Department of Neurology, Zhongshan Hospital, Dalian University, Dalian, China
| | - Jiangtao Zhang
- Department of Neurology, Chengde Central Hospital, Chengde, China
| | - Pei Wang
- The Third Department of Neurology, Baoding First Central Hospital, Baoding, China
| | - Shen Yang
- Department of Neurology, Wuhu No. 1 People’s Hospital, Wuhu, China
| | - Zhou Liu
- Department of Neurology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Xiue Wei
- Department of Neurology, The Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Kai Han
- Department of Neurology, Jiaozuo People’s Hospital, Jiaozuo, China
| | - Zhimin Shi
- Department of Neurology, People’s Hospital of Ningxia Hui Autonomous Region, Yinchuan, China
| | - Aihua Liu
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Zuowen Zhang
- Department of Neurology, Chongqing University Jiangjin Hospital, Chongqing, China
| | - Chunye Ma
- Department of Neurology, The Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Baichen Wang
- Department of Neurology, Tongde Hospital of Zhejiang Province, Hangzhou, China
| | - Gejuan Zhang
- Department of Neurology, The Affiliated Hospital of Northwest University, Xi’an No. 3 Hospital, Xi’an, China
| | - Chengguang Song
- Department of Neurology, Liaoning province Benxi Central Hospital, Benxi, China
| | - Guilian Zhang
- Department of Neurology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Xiao Yang
- Department of Neurology, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Bing Chen
- Department of Radiology, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Baoquan Lu
- Department of neurology, Tangshan Gongren Hospital, Tangshan, China
| | - Beilei Chen
- Department of Neurology, Northern Jiangsu People’s Hospital, Jiangsu, China
| | - Meng Zuo
- Department of Neurology, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Kun Han
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, Ningbo, China
| | - Xiaodan Zhang
- Department of Neurology, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, Ningbo, China
| | - Wenfeng Cao
- Department of neurology, People’s Hospital of Jiangxi province and The First Affiliated Hospital of Nanchang Medical College, Nanchang, China
| | - Lingfeng Wu
- Department of neurology, People’s Hospital of Jiangxi province and The First Affiliated Hospital of Nanchang Medical College, Nanchang, China
| | - Qi Li
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaokun Geng
- Department of Neurology, Beijing Luhe Hospital, Capital Medical University, Beijing, China
| | - Junshan Zhou
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Mengfei Zhong
- Department of MRI, Shengli Oilfield Central Hospital, Shandong, China
| | - Minghua Wang
- Department of Neurology, Daqing People’s Hospital, Daqing, China
| | - Yangmei Chen
- Department of Neurology, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jiachun Liu
- Department of Neurointervention, Beijing Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Tingrui Wang
- Department of Neurology, Binzhou Central Hospital, Binzhou, China
| | - Youqing Deng
- Department of Neurology, The First Hospital of Nanchang, The Third Affiliated Hospital of Nanchang University, Nanchang, China
| | - Weihai Xu
- Department of Neurology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| |
Collapse
|
7
|
Wan T, Zhu W, Zhao Y, Zhang X, Ye R, Zuo M, Xu P, Huang Z, Zhang C, Xie Y, Liu X. Astrocytic phagocytosis contributes to demyelination after focal cortical ischemia in mice. Nat Commun 2022; 13:1134. [PMID: 35241660 PMCID: PMC8894352 DOI: 10.1038/s41467-022-28777-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [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: 06/15/2021] [Accepted: 02/11/2022] [Indexed: 01/24/2023] Open
Abstract
Ischemic stroke can cause secondary myelin damage in the white matter distal to the primary injury site. The contribution of astrocytes during secondary demyelination and the underlying mechanisms are unclear. Here, using a mouse of distal middle cerebral artery occlusion, we show that lipocalin-2 (LCN2), enriched in reactive astrocytes, expression increases in nonischemic areas of the corpus callosum upon injury. LCN2-expressing astrocytes acquire a phagocytic phenotype and are able to uptake myelin. Myelin removal is impaired in Lcn2−/− astrocytes. Inducing re-expression of truncated LCN2(Δ2–20) in astrocytes restores phagocytosis and leads to progressive demyelination in Lcn2−/− mice. Co-immunoprecipitation experiments show that LCN2 binds to low-density lipoprotein receptor-related protein 1 (LRP1) in astrocytes. Knockdown of Lrp1 reduces LCN2-induced myelin engulfment by astrocytes and reduces demyelination. Altogether, our findings suggest that LCN2/LRP1 regulates astrocyte-mediated myelin phagocytosis in a mouse model of ischemic stroke. Ischemic stroke can cause secondary demyelination. Whether phagocytic astrocytes can contribute to such demyelination is unclear. Here, the authors show that lipocalin-2 (LCN-2) expression increased in astrocytes upon injury. LCN-2 expressing astrocytes acquire a phagocytic phenotype and contribute to secondary demyelination in a mouse model of ischemic stroke.
Collapse
Affiliation(s)
- Ting Wan
- Department of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210000, China
| | - Wusheng Zhu
- Department of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210000, China
| | - Ying Zhao
- Department of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210000, China
| | - Xiaohao Zhang
- Department of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210000, China
| | - Ruidong Ye
- Department of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210000, China
| | - Meng Zuo
- Department of Neurology, Southwest Hospital and the First Affiliated Hospital, Army Medical University, Chongqing, 400000, China
| | - Pengfei Xu
- Stroke Center & Department of Neurology, The Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230036, Anhui, China
| | - Zhenqian Huang
- Department of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210000, China
| | - Chunni Zhang
- Department of Clinical Laboratory, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210000, China.
| | - Yi Xie
- Department of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210000, China.
| | - Xinfeng Liu
- Department of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, 210000, China. .,Stroke Center & Department of Neurology, The Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230036, Anhui, China.
| |
Collapse
|
8
|
Gao T, Wang X, Liu Y, Wang H, Zuo M, He Y, Li H, Li G, Li C, Li X, Li X, Yang Y. Characteristics and diversity of microbial communities in lead-zinc tailings under heavy metal stress in north-west China. Lett Appl Microbiol 2021; 74:277-287. [PMID: 34822179 DOI: 10.1111/lam.13608] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 10/15/2021] [Accepted: 10/31/2021] [Indexed: 11/30/2022]
Abstract
High-throughput 16S rRNA and 18S rRNA sequencing were performed to study the changes of soil microbial diversity and community structure under different heavy metal pollution levels in Chengxian lead-zinc mining area, Gansu Province. In this study, we characterized the main physicochemical properties, multiple heavy metal pollution, and microbial community structure of the soil in the tailings. The results show that the soil near the tailings pond was alkaline, barren and the heavy metals were seriously polluted. The microbial diversity and richness of S1 and S2 sites were significantly lower than that of CK2 site (P < 0·05), indicating that the heavy metal pollution could change the physicochemical properties and microbial community structure in soil. Among 97 identified core operating taxa of fungal communities, Ascomycota, Teguta and Basidiomycota were dominant at the phylum level, while among 1523 identified core operating taxa of bacterial communities, Actinomycota was dominant at the phylum level. In addition, the redundancy analysis and Spearman correlation analysis showed that the physicochemical properties and the heavy metal concentration had significant effects on the composition and distribution of soil microbial community. The basic characteristics of soil physicochemical properties, multiple heavy metal pollution and microbial community structure in the tailings were revealed, hoping to provide a basis for ecological rehabilitation of tailings by revealing the variance rule of microbial community diversity in the future.
Collapse
Affiliation(s)
- T Gao
- School of Biological and Environmental Engineering, Xi'an University, Xi'an, China.,Engineering Center for Pollution Control and Ecological Restoration in Mining of Gansu Province, Lanzhou City University, Lanzhou, China
| | - X Wang
- Xi'an Institute of Environment Sanitation Sciences, Xi'an, China
| | - Y Liu
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, China
| | - H Wang
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, China
| | - M Zuo
- College of Geography and Environmental Science, Northwest Normal University, Lanzhou, China
| | - Y He
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, China
| | - H Li
- School of Biological and Environmental Engineering, Xi'an University, Xi'an, China
| | - G Li
- School of Biological and Environmental Engineering, Xi'an University, Xi'an, China
| | - C Li
- Engineering Center for Pollution Control and Ecological Restoration in Mining of Gansu Province, Lanzhou City University, Lanzhou, China
| | - X Li
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, PR China
| | - X Li
- School of Biological and Environmental Engineering, Xi'an University, Xi'an, China
| | - Y Yang
- College of Geography and Environmental Science, Northwest Normal University, Lanzhou, China
| |
Collapse
|
9
|
Qin Y, Zhang S, Cui S, Shen X, Wang J, Cui X, Zuo M, Gao Z, Zhang J, Yang J, Zhu H, Chang B. High urinary excretion rate of glucose attenuates serum uric acid level in type 2 diabetes with normal renal function. J Endocrinol Invest 2021; 44:1981-1988. [PMID: 33515212 PMCID: PMC8357730 DOI: 10.1007/s40618-021-01513-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 01/18/2021] [Indexed: 12/15/2022]
Abstract
AIMS/INTRODUCTION The relationship between urinary excretion rate of glucose (UEGL) and uric acid (UA) metabolism in adults with type 2 diabetes (T2D) remains unclear to date. This study aimed to investigate the relationships of UEGL with serum UA (SUA), urinary excretion rate of uric acid (UEUA), and renal clearance of uric acid (CLUA) in adults with T2D. We hypothesised that high UEGL increases UA excretion, which in turn leads to lower SUA. MATERIALS AND METHODS This was a cross-sectional study of 635 inpatients with T2D recruited between 2018 and 2019. The relationships of UEGL with UEUA, CLUA, and hyperuricaemia were assessed using analysis of covariance and multivariate regression analysis. RESULTS Patients in the higher quartile of UEGL tended to have lower SUA levels than those in the lower quartile. In contrast, patients in the higher quartile of UEGL tended to have higher CLUA (p for trend < 0.0001), and a similar trend was observed for UEUA. In adjusted multivariable linear regression model, UEGL was negatively correlated with SUA (β = - 0.023, 95% CI - 0.034 to - 0.013, p < 0.0001). However, positive correlations of UEGL with UEUA (β = 0.046, 95% CI 0.018-0.074, p = 0.001) and CLUA (β = 0.063, 95% CI 0.042-0.085, p < 0.0001) were found. Furthermore, consistent significant inverse associations were observed between quartiles of UEGL and hyperuricaemia in the adjusted multivariate logistic regression model. CONCLUSIONS A high UEGL level was positively correlated with UEUA and CLUA. Moreover, it was inversely associated with SUA level, and a consistently increased UEGL level reduced the risk of hyperuricaemia in patients with T2D.
Collapse
Affiliation(s)
- Y Qin
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
- Department of Endocrinology, First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi, China
| | - S Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China
| | - S Cui
- Department of Endocrinology, Tianjin First Central Hospital, The First Center Clinical College of Tianjin Medical University, Tianjin, China
| | - X Shen
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - J Wang
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - X Cui
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - M Zuo
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Z Gao
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - J Zhang
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - J Yang
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - H Zhu
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin, China
| | - B Chang
- NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China.
| |
Collapse
|
10
|
Feng GW, Liu X, Qi Q, Wang SJ, Yang CT, Zuo M, Zhang GZ. Skin Ultrastructure and the Changes of HIF-2α, H-FABP Expression in the Myocardium of Electric Shock Death Rats. Fa Yi Xue Za Zhi 2021; 37:158-165. [PMID: 34142475 DOI: 10.12116/j.issn.1004-5619.2020.400321] [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] [Received: 03/19/2020] [Indexed: 11/30/2022]
Abstract
Abstract Objective To observe the skin ultrastructure change of electric shock death rats and to test the expression changes of hypoxia-inducible factor-2α (HIF-2α) and heart type-fatty acid-binding protein (H-FABP) of myocardial cells, in order to provide basis for forensic identification of electric shock death. Methods The electric shock model of rats was established. The 72 rats were randomly divided into control group, electric shock death group and postmortem electric shock group. Each group was divided into three subgroups, immediate (0 min), 30 min and 60 min after death. The skin changes of rats were observed by HE staining, the changes of skin ultrastructure were observed by scanning electron microscopy, and the expression of HIF-2α and H-FABP in rats myocardium was tested by immunohistochemical staining. Results The skin in the electric shock death group and postmortem electric shock group had no significant difference through the naked eye or by HE staining. Under the scanning electron microscope, a large number of cellular debris, cells with unclear boundaries, withered cracks, circular or elliptical holes scattered on the cell surface and irregular edges were observed. A large number of spherical foreign body particles were observed. Compared with the control group, the expression of HIF-2α in all electric shock death subgroups increased, reaching the peak immediately after death. In the postmortem electric shock group, HIF-2α expression only increased immediately after death, but was lower than that of electric shock death group (P<0.05). Compared with the control group, the expression of H-FABP in all subgroups of electric shock death group and postmortem electric shock group significantly decreased. The expression of H-FABP in all subgroups of electric shock death group was lower than that of the postmortem electric shock group (P<0.05). Conclusion Electric shock can increase HIF-2α expression and decrease H-FABP expression in the myocardium, which may be of forensic significance for the determination of electric shock death and identification of antemortem and postmortem electric shock.
Collapse
Affiliation(s)
- G W Feng
- Judicial Expertise Center, the First Hospital of Hebei Medical University, Shijiazhuang 050031, China
| | - X Liu
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - Q Qi
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - S J Wang
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - C T Yang
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - M Zuo
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - G Z Zhang
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| |
Collapse
|
11
|
Zuo M, Liao G, Zhang W, Xu D, Lu J, Tang M, Yan Y, Hong C, Wang Y. Effects of exogenous adiponectin supplementation in early pregnant PCOS mice on the metabolic syndrome of adult female offspring. J Ovarian Res 2021; 14:15. [PMID: 33455575 PMCID: PMC7812650 DOI: 10.1186/s13048-020-00755-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 07/31/2020] [Accepted: 12/11/2020] [Indexed: 12/23/2022] Open
Abstract
Objective PCOS is a heterogeneous endocrine disorder with both reproductive and metabolic abnormalities. At present, PCOS has been confirmed to have a certain genetic background. Compared with healthy women, the vast majority of PCOS patients have hyperandrogenemia, and this excessive androgen exposure during pregnancy may affect the development of female fetuses. The aim of the current study was to investigate the effect of adiponectin intervention during early pregnancy of obese mice with PCOS on the metabolic phenotype of adult female offspring. Methods After the PCOS model was established, C57BL/6J mice were divided into maternal-control, maternal-PCOS, and maternal-PCOS + APN groups. DHEA-induced PCOS mice were supplemented with adiponectin (10 mg/kg/day) in the early pregnancy in order to eliminate adverse hormone exposure and then traced for endocrine indicators in their adult female offspring, which were observed for metabolism syndrome or endocrine disturbance and exhibited the main effects of APN. To further explore the underlying mechanism, the relative expressions of phosphorylated AMPK, PI3K, and Akt were detected in the ovaries of offspring mice. Results The serum testosterone level of the maternal-PCOS + APN group in early pregnancy was significantly lower than that of the maternal-PCOS group (p < 0.01). The serum testosterone level in the offspring-PCOS + APN group was significantly lower than in the offspring-PCOS group (p <0.05), the diestrus time characterized by massive granulocyte aggregation in the estrus cycle was significantly shorter than in the offspring-PCOS group (p<0.05), and the phenotypes of PCOS-like reproductive disorders and metabolic disorders, such as obesity, insulin resistance, impaired glucose tolerance, and hyperlipidemia, were also significantly improved in the offspring-PCOS + APN group (p < 0.05). Compared with the control group, the expression levels of phosphorylated AMPK, PI3K, and Akt in the offspring-PCOS group were significantly decreased (p < 0.05), while those in the offspring-PCOS + APN group were significantly increased (p < 0.05). Conclusions APN intervention in early pregnancy significantly reduced the adverse effects of maternal obesity and high androgen levels during pregnancy on female offspring and corrected the PCOS-like endocrine phenotype and metabolic disorders of adult female offspring. This effect may be caused by the activation of the AMPK/PI3K-Akt signaling pathway in PCOS offspring mice.
Collapse
Affiliation(s)
- Meng Zuo
- Department of Reproductive Medicine, The First Affiliated Hospital, Jinan University, 601 West Huangpu Avenue, 510000, Guangzhou, People's Republic of China
| | - Guotao Liao
- The Second Hospital, University of South China, 421001, Hengyang, People's Republic of China
| | - Wenqian Zhang
- Department of Reproductive Medicine, The First Affiliated Hospital, Jinan University, 601 West Huangpu Avenue, 510000, Guangzhou, People's Republic of China
| | - Dan Xu
- Department of Obstetrics and Gynecology, The Second People's Hospital of Yueyang, 414000, Yueyang, People's Republic of China
| | - Juan Lu
- Department of Reproductive Medicine, The First Affiliated Hospital, Jinan University, 601 West Huangpu Avenue, 510000, Guangzhou, People's Republic of China
| | - Manhong Tang
- Department of Reproductive Medicine, The First Affiliated Hospital, Jinan University, 601 West Huangpu Avenue, 510000, Guangzhou, People's Republic of China
| | - Yue Yan
- Department of Reproductive Medicine, The First Affiliated Hospital, Jinan University, 601 West Huangpu Avenue, 510000, Guangzhou, People's Republic of China
| | - Chenghao Hong
- Department of Reproductive Medicine, The First Affiliated Hospital, Jinan University, 601 West Huangpu Avenue, 510000, Guangzhou, People's Republic of China
| | - Yuxia Wang
- Department of Reproductive Medicine, The First Affiliated Hospital, Jinan University, 601 West Huangpu Avenue, 510000, Guangzhou, People's Republic of China.
| |
Collapse
|
12
|
Zhang X, Zuo M, Yang W, Wan X. A Tri-Stable Piezoelectric Vibration Energy Harvester for Composite Shape Beam: Nonlinear Modeling and Analysis. Sensors (Basel) 2020; 20:s20051370. [PMID: 32131499 PMCID: PMC7085764 DOI: 10.3390/s20051370] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 02/26/2020] [Accepted: 02/27/2020] [Indexed: 12/02/2022]
Abstract
To reveal the nonlinear mechanism of the tri-stable piezoelectric vibration energy harvester based on composite shape beam (TPEH-C) and its influence on the system response, the nonlinear restoring force and the nonlinear magnetic force are discussed and analyzed in this paper. The nonlinear magnetic model is acquired by using equivalent magnetizing current theory, and the nonlinear resilience model is obtained by fitting experimental data. The corresponding distributed parameter model based on generalized Hamiltonian variation principle has been established. Frequency response functions for the TPEH-C are derived according to harmonic balance expansion, and the influence of different magnet distances and different excitation accelerations on the response amplitude and bandwidth of the TPEH-C are investigated. More importantly, the correctness of the theoretical analysis is verified by experiments. The results reveal that the spectrum of composite beam shows hard characteristic and the depth of potential well is changed, which provides a new way to ameliorate the potential well of the TPEH-C. A suitable magnet distance enables the TPEH-C to improve the response amplitude and the effective frequency range. The results in this paper have a theoretical guiding significance for the optimal design and engineering application of the TPEH-C.
Collapse
Affiliation(s)
- Xuhui Zhang
- College of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; (W.Y.); (X.W.)
- Shaanxi Key Laboratory of Mine Electromechanical Equipment Intelligent Monitoring, Xi’an 710054, China
- Correspondence: (X.Z.); (M.Z.); Tel.: +86-133-6397-5328 (X.Z.); +86-188-2934-5364 (M.Z.)
| | - Meng Zuo
- College of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; (W.Y.); (X.W.)
- Correspondence: (X.Z.); (M.Z.); Tel.: +86-133-6397-5328 (X.Z.); +86-188-2934-5364 (M.Z.)
| | - Wenjuan Yang
- College of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; (W.Y.); (X.W.)
- Shaanxi Key Laboratory of Mine Electromechanical Equipment Intelligent Monitoring, Xi’an 710054, China
| | - Xiang Wan
- College of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; (W.Y.); (X.W.)
- Shaanxi Key Laboratory of Mine Electromechanical Equipment Intelligent Monitoring, Xi’an 710054, China
| |
Collapse
|
13
|
Zuo M, Guo H, Wan T, Zhao N, Cai H, Zha M, Xiong Y, Xie Y, Ye R, Liu X. Wallerian degeneration in experimental focal cortical ischemia. Brain Res Bull 2019; 149:194-202. [PMID: 31051228 DOI: 10.1016/j.brainresbull.2019.04.023] [Citation(s) in RCA: 10] [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] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 04/22/2019] [Accepted: 04/24/2019] [Indexed: 12/14/2022]
Abstract
Wallerian degeneration (WaD), commonly secondary to cerebral infarction, is the descending damage of fiber tracts with their accompanying myelin sheaths. However, whether this sequential injury can occur in non-ischemic corpus callosum (CC) and striatum in focal cortical ischemic model has not been fully demonstrated. The present study aimed to elucidate detailed histopathologic changes in CC and striatum after acute focal cortical infarction induced by permanent distal middle cerebral artery occlusion (dMCAO) in Sprague-Dawley rat. We found that myelin integrity, myelin-related proteins, MBP and MAG, and NF200-marked neurofilaments were all compromised in non-ischemic white matter regions, bilateral CC and ipsilateral striatum, along with cortical ischemia (all P < 0.05). Electron microscopy showed wide gaps between myelin sheath layers or between axon and myelin, with an abnormal folding of myelin sheath, and enlarged fluid-filled areas. APP accumulations were noted at 24 h post-dMCAO in those non-ischemic regions, and the deposition prolonged until 14 days after cortical ischemia (all P < 0.05). Moreover, in these areas, microglia and astrocytes were robustly and persistently activated in different patterns. No substantial changes were observed in contralateral striatum. In conclusion, our results suggest that WaD may be involved in non-ischemic CC and striatum after focal cortical infarction, accompanied by APP aggregation and neuroglia initiation forming the glial scar.
Collapse
Affiliation(s)
- Meng Zuo
- Department of Neurology, Jinling Hospital, School of Medicine, Southeast University, Nanjing 210002, China; Department of Neurology, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - Hongquan Guo
- Department of Neurology, Jinling Hospital, Southern Medical University, Nanjing 210002, China
| | - Ting Wan
- Department of Neurology, Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, China
| | - Nana Zhao
- Department of Neurology, Jinling Hospital, School of Medicine, Southeast University, Nanjing 210002, China
| | - Haodi Cai
- Department of Neurology, Jinling Hospital, School of Medicine, Southeast University, Nanjing 210002, China
| | - Mingming Zha
- Department of Neurology, Jinling Hospital, School of Medicine, Southeast University, Nanjing 210002, China
| | - Yunyun Xiong
- Department of Neurology, Jinling Hospital, School of Medicine, Southeast University, Nanjing 210002, China
| | - Yi Xie
- Department of Neurology, Jinling Hospital, School of Medicine, Southeast University, Nanjing 210002, China.
| | - Ruidong Ye
- Department of Neurology, Jinling Hospital, School of Medicine, Southeast University, Nanjing 210002, China.
| | - Xinfeng Liu
- Department of Neurology, Jinling Hospital, School of Medicine, Southeast University, Nanjing 210002, China
| |
Collapse
|
14
|
Zhang X, Yang W, Zuo M, Tan H, Fan H, Mao Q, Wan X. An Arc-shaped Piezoelectric Bistable Vibration Energy Harvester: Modeling and Experiments. Sensors (Basel) 2018; 18:s18124472. [PMID: 30563023 PMCID: PMC6308499 DOI: 10.3390/s18124472] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 12/14/2018] [Accepted: 12/15/2018] [Indexed: 11/16/2022]
Abstract
In order to improve vibration energy harvesting, this paper designs an arc-shaped piezoelectric bistable vibration energy harvester (ABEH). The bistable configuration is achieved by using magnetic coupling, and the nonlinear magnetic force is calculated. Based on Lagrangian equation, piezoelectric theory, Kirchhoff's law, etc., a complete theoretical model of the presented ABEH is built. The influence of the nonlinear stiffness terms, the electromechanical coupling coefficient, the damping, the distance between magnets, and the load resistance on the dynamic response and the energy harvesting performance of the ABEH is numerically explored. More importantly, experiments are designed to verify the energy harvesting enhancement of the ABEH. Compared with the non-magnet energy harvester, the ABEH has much better energy harvesting performance.
Collapse
Affiliation(s)
- Xuhui Zhang
- College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China.
- Shaanxi Key Laboratory of Mine Electromechanical Equipment Intelligent Monitoring, Xi'an 710054, China.
| | - Wenjuan Yang
- College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China.
| | - Meng Zuo
- College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China.
| | - Houzhi Tan
- College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China.
| | - Hongwei Fan
- College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China.
- Shaanxi Key Laboratory of Mine Electromechanical Equipment Intelligent Monitoring, Xi'an 710054, China.
| | - Qinghua Mao
- College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China.
- Shaanxi Key Laboratory of Mine Electromechanical Equipment Intelligent Monitoring, Xi'an 710054, China.
| | - Xiang Wan
- College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China.
- Shaanxi Key Laboratory of Mine Electromechanical Equipment Intelligent Monitoring, Xi'an 710054, China.
| |
Collapse
|
15
|
Yang CT, Zuo M, Wang SJ, Liu X, Ma RF, Qi Q, Bi HT, Li YM, Zhang GZ. Estimation on Formation Time of Thrombus. Fa Yi Xue Za Zhi 2018; 34:352-358. [PMID: 30465397 DOI: 10.12116/j.issn.1004-5619.2018.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To observe the changes of the formation time of venous thrombus in rats, and to provide new ideas and methods for the estimation on thrombus formation time of the forensic cases died from thrombosis. METHODS Totally 80 rats were randomly divided into 10 groups (0 h, 3 h, 6 h, 12 h, 1 d, 3 d, 1 week, 2 weeks, 3 weeks and 4 weeks after operation). A vein thrombosis model was established by the "narrow" method. The processes of thrombosis, organization, recanalization and the features of change on hemosiderin and calcium salt were observed by HE stain, Perls stain and Von Kossa stain. The expression changes of CD61, α-SMA and CD34 were observed by immunohistochemical staining technique. RESULTS Platelets adhered to the exposed blood vessel intima 3 h after operation, and platelet trabeculae were formed by the repeated accumulation of platelets 1 d after operation. The thrombus organization formed through the fibroblasts from vessel wall that grew into the interior of the thrombus 3 d after operation. Endothelial cells covered the surface of thrombus and then the new blood vessels were reformed, and the vessels were reconstructed. The expression of CD61 upregulated at the stages of the thrombus formation (3 h) and thrombus reformation (4 weeks), and reached the peak 1 d after thrombus formation. The release of hemosiderin and the initial expression of α-SMA were detected 3 d later. Calcium deposit and expression of CD34 were observed 1 week later. CONCLUSIONS The hemosiderin, calcium salt, CD61, α-SMA and CD34 show time-dependent changing characteristics, which is expected to provide a reference for the estimation on thrombus formation time of the forensic cases died from thrombosis.
Collapse
Affiliation(s)
- C T Yang
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - M Zuo
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - S J Wang
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - X Liu
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - R F Ma
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - Q Qi
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - H T Bi
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - Y M Li
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| | - G Z Zhang
- Hebei Key Laboratory of Forensic Medicine, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China
| |
Collapse
|
16
|
Sun B, Shi Z, Pu J, Yang S, Wang H, Yang D, Hao Y, Lin M, Ke W, Liu W, Guo F, Bai Y, Zhang S, Li Z, Li S, Zuo M, Xu G, Zi W, Liu X. Effects of mechanical thrombectomy for acute stroke patients with etiology of large artery atherosclerosis. J Neurol Sci 2018; 396:178-183. [PMID: 30476651 DOI: 10.1016/j.jns.2018.10.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/23/2018] [Accepted: 10/18/2018] [Indexed: 12/29/2022]
Abstract
AIMS Atherosclerosis is more prevalent in Asian population. This distinct etiology of stroke might disadvantage Asian patients when applying. mechanical thrombectomy (MT). The purpose of this research was to evaluate the efficacy and safety of MT in a cohort of Chinese patients with acute ischemic stroke. due to large artery atherosclerosis (LAA). METHODS AND RESULTS A total of 649 patients treated with MT were included. Patients were classified according to etiology of stroke as LAA and cardioembolism ones. Successful revascularization was defined as modified Thrombolysis in Cerebral Infarction (mTICI) grade ≥ 2b. Favorable outcome was defined as modified Rankin Scale (mRS) score ≤ 2 at 90 days. Logistic regression was used to identify predictors for functional outcomes. The patients with stroke of LAA etiology had significantly higher rate of favorable functional outcome (50.2% vs 36.5%, p < .001) and good collateral (grade of ASITN/SIRI: 2-3) (58.8% versus 43.2%, p < .001), and lower median baseline National Institutes of Health Stroke Scale score (NIHSS) (15.6 versus 18.2, p < .001), compared to patients with stroke of cardioembolism etiology. There was no significant difference in the rate of successful postprocedural mTICI between groups (84.5% versus 83.2%, p = .671). Rates of symptomatic intracranial hemorrhage (20.0% versus 11.7%, p = .004) and mortality (31.8% versus 18.8%, p < .001) within 3 months were notably higher in the cardioembolism group than that in the LAA group. CONCLUSION Mechanical thrombectomy may be more efficacious in treating acute ischemic stroke of LAA etiology than that of cardioembolism etiology.
Collapse
Affiliation(s)
- Bo Sun
- Department of Neurology, Jinling Clinical College of Nanjing Medical University, Nanjing, Jiangsu, China; Department of Neurology, Huai'an First People's Hospital, Nanjing Medical University, Huai'an, Jiangsu, China
| | - Zhonghua Shi
- Department of Neurosurgery, The 101(st) Hospital of The People's Liberation Army, Wuxi, Jiangsu, China
| | - Jie Pu
- Department of Neurology, Jinling Hospital, Southern Medical University, Nanjing, Jiangsu, China
| | - Shiquan Yang
- Department of Neurology, The 123(rd) Hospital of The People's Liberation Army, Bengbu, Anhui, China
| | - Huaiming Wang
- Department of Neurology, Jinling Hospital, Second Military Medical University, Nanjing, Jiangsu, China; Department of Neurology, The 89(th) Hospital of The People's Liberation Army, Weifang, Shandong, China
| | - Dong Yang
- Department of Neurology, Jinling Hospital, Second Military Medical University, Nanjing, Jiangsu, China
| | - Yonggang Hao
- Department of Neurology, Jinling Hospital, Southern Medical University, Nanjing, Jiangsu, China; Department of Emergency Medicine, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Min Lin
- Department of Neurology, Fuzhou General Hospital of Nanjing Military Region, Fuzhou, Fujian, China
| | - Wei Ke
- Department of Neurology, Hubei Zhongshan Hospital, Wuhan, Hubei, China
| | - Wenhua Liu
- Department of Neurology, Wuhan No. 1 Hospital, Wuhan, Hubei, China
| | - Fuqiang Guo
- Department of Neurology, Sichuan Provincial People's Hospital, Chengdu, Sichuan, China
| | - Yongjie Bai
- Department of Neurology, Jinling Clinical College of Nanjing Medical University, Nanjing, Jiangsu, China; Department of Neurology, First Affiliated Hospital, College of Clinical Medicine of Henan University of Science and Technology, Luoyang, Henan, China
| | - Shuai Zhang
- Department of Neurology, Jinling Clinical College of Nanjing Medical University, Nanjing, Jiangsu, China; Department of Neurology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, China
| | - Zibao Li
- Department of Neurology, Jinling Clinical College of Nanjing Medical University, Nanjing, Jiangsu, China; Department of Neurology, Yijishan Hospital of Wannan Medical College, Wuhu, Anhui, China
| | - Shun Li
- Department of Neurology, Jinling Hospital, Southern Medical University, Nanjing, Jiangsu, China
| | - Meng Zuo
- Department of Neurology, Jinling Hospital, Medical School of Southeast University, Nanjing, Jiangsu, China
| | - Gelin Xu
- Department of Neurology, Jinling Clinical College of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Wenjie Zi
- Department of Neurology, Jinling Clinical College of Nanjing Medical University, Nanjing, Jiangsu, China.
| | - Xinfeng Liu
- Department of Neurology, Jinling Clinical College of Nanjing Medical University, Nanjing, Jiangsu, China.
| |
Collapse
|
17
|
Ni L, Tang R, Lv L, Wang S, Song K, Wang L, Zuo M, liu B. SuO030FK506 ATTENUATES BONE LOSS IN DIABETIC RATS VIA PROMOTING OSTEOBLAST DIFFERENTIATION BUT INHIBITING ADIPOCYTE DIFFERENTIATION. Nephrol Dial Transplant 2018. [DOI: 10.1093/ndt/gfy104.suo030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Lihua Ni
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hostipal, Nanjing, Jiangsu Province, China
| | - Rining Tang
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hostipal, Nanjing, Jiangsu Provcince, China
| | - Linli Lv
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hostipal, Nanjing, Jiangsu Provcince, China
| | - Sisi Wang
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hostipal, Nanjing, Jiangsu Provcince, China
| | - Kaiyun Song
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hostipal, Nanjing, Jiangsu Provcince, China
| | - Liting Wang
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hostipal, Nanjing, Jiangsu Provcince, China
| | - Meng Zuo
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hostipal, Nanjing, Jiangsu Provcince, China
| | - Bicheng liu
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hostipal, Nanjing, Jiangsu Provcince, China
| |
Collapse
|
18
|
Ni L, Tang R, Song K, wang L, Zuo M, liu B. FP380CINACALCET ATTENUATES BONE LOSS IN CKD RATS WITH ESTABLISHED SECONDARY HYPERPARATHYROIDISM. Nephrol Dial Transplant 2018. [DOI: 10.1093/ndt/gfy104.fp380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Lihua Ni
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hostipal, Nanjing, Jiangsu Province, China
| | - Rining Tang
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| | - Kaiyun Song
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| | - Liting wang
- Institute of Nephrology, Zhongda Hospital, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| | - Meng Zuo
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| | - Bicheng liu
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| |
Collapse
|
19
|
Ni L, Tang R, Song K, Wang L, Zuo M, Wu M, Lv L, Liu B. FP382A RAT MODEL OF SHPT WITH BONE ABNORMALITIES IN CKD RATS INDUCED BY ADENINE AND HIGH PHOSPHORUS DIET. Nephrol Dial Transplant 2018. [DOI: 10.1093/ndt/gfy104.fp382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Lihua Ni
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| | - Rining Tang
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| | - Kaiyun Song
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| | - Liting Wang
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| | - Meng Zuo
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| | - Min Wu
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| | - Linli Lv
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| | - Bicheng Liu
- Southeast University School of Medicine, Institute of Nephrology, Zhongda Hospital, Nanjing, Jiangsu Province, China
| |
Collapse
|
20
|
Liu Y, Wu D, Qu MY, He JL, Yuan M, Zhao M, Wang JX, He J, Wang LQ, Guo XJ, Zuo M, Zhao SY, Ma MN, Li JN, Shou W, Qiao GF, Li BY. Neuropeptide Y-mediated sex- and afferent-specific neurotransmissions contribute to sexual dimorphism of baroreflex afferent function. Oncotarget 2018; 7:66135-66148. [PMID: 27623075 PMCID: PMC5323221 DOI: 10.18632/oncotarget.11880] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 07/16/2016] [Indexed: 01/19/2023] Open
Abstract
Background Molecular and cellular mechanisms of neuropeptide-Y (NPY)-mediated gender-difference in blood pressure (BP) regulation are largely unknown. Methods Baroreceptor sensitivity (BRS) was evaluated by measuring the response of BP to phenylephrine/nitroprusside. Serum NPY concentration was determined using ELISA. The mRNA and protein expression of NPY receptors were assessed in tissue and single-cell by RT-PCR, immunoblot, and immunohistochemistry. NPY was injected into the nodose while arterial pressure was monitored. Electrophysiological recordings were performed on nodose neurons from rats by patch-clamp technique. Results The BRS was higher in female than male and ovariectomized rats, while serum NPY concentration was similar among groups. The sex-difference was detected in Y1R, not Y2R protein expression, however, both were upregulated upon ovariectomy and canceled by estrogen replacement. Immunostaining confirmed Y1R and Y2R expression in myelinated and unmyelinated afferents. Single-cell PCR demonstrated that Y1R expression/distribution was identical between A- and C-types, whereas, expressed level of Y2R was ∼15 and ∼7 folds higher in Ah- and C-types than A-types despite similar distribution. Activation of Y1R in nodose elevated BP, while activation of Y2R did the opposite. Activation of Y1R did not alter action potential duration (APD) of A-types, but activation of Y2R- and Y1R/Y2R in Ah- and C-types frequency-dependently prolonged APD. N-type ICa was reduced in A-, Ah- and C-types when either Y1R, Y2R, or both were activated. The sex-difference in Y1R expression was also observed in NTS. Conclusions Sex- and afferent-specific expression of Neuropeptide-Y receptors in baroreflex afferent pathway may contribute to sexual-dimorphic neurocontrol of BP regulation.
Collapse
Affiliation(s)
- Yang Liu
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Di Wu
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Mei-Yu Qu
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Jian-Li He
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Mei Yuan
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Miao Zhao
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Jian-Xin Wang
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Jian He
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Lu-Qi Wang
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Xin-Jing Guo
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Meng Zuo
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Shu-Yang Zhao
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Mei-Na Ma
- Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Jun-Nan Li
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Weinian Shou
- Riley Heart Research Center, Division of Pediatric Cardiology, Herman B. Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Guo-Fen Qiao
- Department of Pharmacology, Harbin Medical University, Harbin, China.,Key Laboratory of Cardiovascular Research of Ministry of Education, Harbin Medical University, Harbin, China
| | - Bai-Yan Li
- Department of Pharmacology, Harbin Medical University, Harbin, China
| |
Collapse
|
21
|
|
22
|
Li H, Zuo M, Zhao X, Zhang B, Gelb A, Yao D, Xia D, Li M, Wang K, Wu L, Huang Y. Abstract PR589. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492969.38623.3d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
23
|
He JL, Li JN, Zuo CM, Wang LQ, Wen X, Zuo M, Guan J, Wu D, Song DX, Yu X, Qu MY, Liu Y, Qiao GF, Li BY. Potentiation of 17β-estradiol on neuroexcitability by HCN-mediated neuromodulation of fast-afterhyperpolarization and late-afterdepolarization in low-threshold and sex-specific myelinated Ah-type baroreceptor neurons via GPR30 in female rats. Int J Cardiol 2015; 182:174-8. [DOI: 10.1016/j.ijcard.2014.12.068] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 12/21/2014] [Indexed: 10/24/2022]
|
24
|
Yan ZY, He JL, Wen X, Zuo M, Guo XJ, Guo TZ, Schild JH, Qiao GF, Li BY. Retracted: Significant variations in afferent conduction and axonal morphology of aortic depressive nerve imply broader spectrum of baroreflex function of myelinated Ah-type baroreceptor neurons in female rats. Int J Cardiol 2014; 176:1280-3. [PMID: 25127981 DOI: 10.1016/j.ijcard.2014.07.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 07/27/2014] [Indexed: 11/15/2022]
Affiliation(s)
- Zhen-Yu Yan
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Jian-Li He
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Xin Wen
- Key Laboratory of Cardiovascular Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - Meng Zuo
- Department of Pharmacology, Harbin Medical University, Harbin, China
| | - Xin-Jing Guo
- Key Laboratory of Cardiovascular Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - Tian-Zhu Guo
- Department of Immunology, Capital Medical University School of Basic Medical Science, 10 Xitoutiao, Youanmen, Fengtai District, Beijing 10069, China
| | - John H Schild
- Department of Biomedical Engineering, School of Technology and Engineering, IN University Purdue University Indianapolis, Indianapolis, USA
| | - Guo-Fen Qiao
- Department of Pharmacology, Harbin Medical University, Harbin, China; Key Laboratory of Cardiovascular Research, Ministry of Education, Harbin Medical University, Harbin, China
| | - Bai-Yan Li
- Department of Pharmacology, Harbin Medical University, Harbin, China.
| |
Collapse
|
25
|
Yan ZY, He JL, Wen X, Zuo M, Guo XJ, Guo TZ, Schild JH, Qiao GF, Li BY. Retraction notice to Significant variations in afferent conduction and axonal morphology of aortic depressive nerve imply broader baroreflex function of myelinated Ah-type baroreceptor neurons in female rats. Int J Cardiol 2014; 176:R2. [DOI: 10.1016/j.ijcard.2014.11.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
26
|
Zhuang S, Li Y, Zuo M, Tan X, Meng B, Yang N, Liu S. Dense composite electrolyte hollow fibre membranes for high temperature CO2 separation. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.06.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
27
|
Zuo M, Zhuang S, Tan X, Meng B, Yang N, Liu S. Ionic conducting ceramic–carbonate dual phase hollow fibre membranes for high temperature carbon dioxide separation. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2014.01.047] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
28
|
Liu Y, Zuo M, Liao S, Zhang Y, Au K, De Rama R, Shuto C, Chen P, Siu C, Tse H. Catheter-based renal denervation improves cardiac function in a porcine model of ischemic heart failure. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p5754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
29
|
Zhang CJ, Chu HJ, Chen GX, Shi DW, Zuo M, Wang J, Lu CG, Wang P, Chen L. Photosynthetic and biochemical activities in flag leaves of a newly developed superhigh-yield hybrid rice (Oryza sativa) and its parents during the reproductive stage. J Plant Res 2007; 120:209-17. [PMID: 17077941 DOI: 10.1007/s10265-006-0038-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2006] [Accepted: 08/16/2006] [Indexed: 05/08/2023]
Abstract
Responses of net photosynthetic rates to intercellular CO(2) concentration (P (n)/C (i) curves) and photochemical characteristics were investigated in flag leaves of newly developed superhigh-yield hybrid rice (Oryza sativa L.) LiangYouPeiJiu (LYPJ) and its maternal PeiAi64S (PA64S) and paternal WuMang9311 (WM9311) lines grown in the field during the reproductive stage. The results showed that photosynthetic functions, such as the electron transport activities of photosystems and photophosphorylation, assessed in vivo from P (n)/C (i) curves under field conditions declined more or earlier than those obtained in vitro. The degradation of polypeptides of thylakoid membranes was slower than those for P (Ca=360) (light-saturated net photosynthetic rate measured at 360 mumol mol(-1)) and CE (carboxylation efficiency, obtained from the initial slope of the P (n)/C (i) curve). The initial inhibition of the PSII electron transport and oxygen-evolving activity induced by senescence occurred before the degradation of the oxygen-evolving complex. In comparison, LYPJ had intermediate photosynthetic functions in the early stage of leaf development, but greater photochemical activities in the mid and late stages. WM9311 showed a similar pattern of changes but lower values, and PA64S had higher values in the early stage but showed a faster rate of senescence than LYPJ. These findings implied that the hybrid LYPJ demonstrated intermediate photosynthetic activities between its parents in the early stage of leaf development, whereas it had higher photosynthetic activities than its parents in the mid and late stages, which may be responsible for its high yield.
Collapse
Affiliation(s)
- C-J Zhang
- Key Lab of Biodiversity and Biotechnology of Jiangsu Province, College of Life Sciences, Nanjing Normal University, Nanjing, PR China
| | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Zuo M, Nishio H, Lee MJ, Maejima K, Mimura S, Sumino K. The C677T mutation in the methylene tetrahydrofolate reductase gene increases serum uric acid in elderly men. J Hum Genet 2000; 45:257-62. [PMID: 10944859 DOI: 10.1007/s100380070037] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [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: 11/29/2022]
Abstract
A common mutation, C677T, in the methylene tetrahydrofolate reductase gene (MTHFR) reduces the activity of MTHFR and increases total homocysteine levels in plasma. Increased homocysteine levels are reportedly associated with high serum uric acid levels. The relationship between the MTHFR mutation and uric acid metabolism remains unclear, however. To investigate whether the C677T MTHFR mutation is a risk factor for hyperuricemia, we performed MTHFR genotyping and clinical laboratory determinations, including serum uric acid, in 271 elderly Japanese men (age range, 40-79 years; mean, 52.6 years). The mean uric acid levels for the C/C, C/T, and T/T genotypes were 5.67, 6.00, and 6.39 mg/dl, respectively (P = 0.012). The T/T genotype was more frequent in subjects with high uric acid levels than in those with low uric acid levels (P = 0.038). These findings suggest that the C677T MTHFR mutation contributed to higher uric acid levels in subjects enrolled in this study. In conclusion, the mutation of the MTHFR gene may be a risk factor for hyperuricemia in elderly men.
Collapse
Affiliation(s)
- M Zuo
- Department of Public Health, Kobe University School of Medicine, Japan
| | | | | | | | | | | |
Collapse
|
31
|
Guo X, Cong B, Gu Z, Zuo M, Zhang G, Yao Y, Peng Y, Wang J, You H. Study on DNA polymorphism at D1S8 locus in Hebei Han population. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2000; 17:192-5. [PMID: 10837523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
OBJECTIVE To study the polymorphism at D1S8 locus and to provide basic information for the construction of DNA fingerprint database and the application in forensic medicine. METHODS Minisatellite variant repeat-polymerase chain reaction (MVR-PCR) and polyacrylamide gradient gel electrophoresis followed by silver staining were used to detect the variant repeat sequences at D1S8 locus of 240 unrelated individuals in Hebei Han population, and digital codes were obtained. RESULTS Each individual obtained about 30 digital codes, in which none of two unrelated individuals had the same code. The probability of identity of 30 digital codes was 3.55x10(-11). The percentages of three repeat units, a-type, t-type and o-type were 54.77%, 42.54% and 2.69% respectively. The heterozygosity (H) was 0.9837. The excluding probability of paternity(EPP) and polymorphism information content(PIC) were 0.9669 and 0.9833 respectively. CONCLUSION Because of its high polymorphic nature, D1S8 locus is a valuable marker for forensic identification and paternity testing.
Collapse
Affiliation(s)
- X Guo
- Department of Forensic Medicine, Hebei Medical University, Shijiazhuang, Hebei, 050017 P. R. China.
| | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Zuo M, Lee MJ, Kim MH, Wu Y, Ayaki H, Nishio H, Sumino K. C677T mutation of the methylenetetrahydrofolate reductase gene among the Korean infants in Seoul city. Kobe J Med Sci 1999; 45:271-9. [PMID: 10985160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
The missense mutation, C677T (Ala--->Val), in the methylenetetrahydrofolate reductase (MTHFR) gene, is related to hyperhomocysteinemia and is regarded as a risk factor for coronary artery disease and neural tube defects. The prevalence of this mutation was reported to differ among various ethnic groups, but there are few reports concerning Asian populations. We have investigated the frequencies of C677T mutation in 124 Korean infants (residents in Seoul city, Korea) and 115 Japanese adults (residents in Kobe city, Japan), and compared them with the reported data from other ethnic groups. The frequencies of the three genotypes in Koreans were as follows: C/C (wild homozygosity) 0.27, C/T (heterozygosity) 0.66, T/T (mutated homozygosity) 0.07, while those in Japanese were as follows: C/C 0.44, C/T 0.40, T/T 0.16. There was a marked difference in the genotype frequencies between the two populations (chi-square = 16.67, P = 0.0002), even though they are closely related in genetic background. The high C/T genotype frequency led to significant deviation from Hardy-Weinberg equilibrium (chi-square = 17.35, P = 0.00003). Deviation from Hardy-Weinberg equilibrium has not been found in any other ethnic groups. The high frequency of C/T genotype may offer Koreans a selective advantage.
Collapse
Affiliation(s)
- M Zuo
- Department of Public Health, Kobe University School of Medicine
| | | | | | | | | | | | | |
Collapse
|
33
|
Cheng M, Chaiken M, Zuo M, Miller H. Nucleus taenia of the amygdala of birds: anatomical and functional studies in ring doves (Streptopelia risoria) and European starlings (Sturnus vulgaris). Brain Behav Evol 1999; 53:243-70. [PMID: 10473902 DOI: 10.1159/000006597] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Nucleus taenia (Tn) in birds is a discrete component of a loosely defined archistriatal structure, the posterior and medial archistriatum. By virtue of its hypothalamic projections, the posterior and medial archistriatum is thought to be an avian homolog of the amygdala in mammals. A recent fluorogold (FG) study of avian hippocampus revealed backfilled labels in nucleus Tn, suggesting that this nucleus may indeed be the homolog of mammalian amygdala. In the present study, we sought to characterize nucleus Tn in terms of its connections and function. We used the anterograde tracers Phaseolus vulgaris leucoagglutinin (PHAL) and biotinylated dextran amine (BDA) to map the efferent projections of Tn. The retrograde tracers FG and BDA were used to corroborate the efferent projections and to explore the pattern of afferent inputs to Tn. Finally, we explored the role of Tn in social behavior by observing behavioral changes associated with electrolytic lesions to Tn. The subjects of our studies were ring doves and European starlings, representing two avian orders. When a deposit of anterograde tracer was centered in Tn, it revealed projections to the hypothalamus, following the course of the hypothalamic-occipitomesencephalic tract previously reported in pigeons. The projections were bilateral in ring doves and ipsilateral in starlings. The BDA injections in the archistratum intermedium, lateral to Tn, did not yield the same projectional pattern. Together with corroborative data from FG retrograde experiments, these findings suggest that Tn is probably the primary origin of the hypothalamic projection. A robust projection to the hyperstriatal region was present along the lateral wall of the lateral ventricle, continuing into the anteroventral pole of the ventricle. Highly arborized terminal fields were found all along this pathway, notably in the medial parolfactory lobe (corresponding to the basal ganglia) and along the dorsal roof of the rostral hyperstriatum ventrale just ventral to the laminal frontalis superior (in ring doves) and the lamina frontalis suprema (in starlings). Projections to the hippocampal complex were mostly restricted to the parahippocampus. The FG data suggest the presence of afferent projections from the ovoidais shell and nucleus subrotundus region, the hippocampal complex in both species, and high vocal nucleus in starlings. Behavioral effects of Tn lesions suggest that nucleus taenia is involved in the control of social behavior through its influence on the affective state. Nucleus taenia thus exhibits many of the structural and functional features of the amygdaloid complex in mammals - that is, subcortical sensory inputs, hippocampal complex connections, and a functional role in adaptive patterns of social behavior.
Collapse
Affiliation(s)
- M Cheng
- Department of Psychology, Biopsychology Program, Newark, NJ 07102, USA
| | | | | | | |
Collapse
|
34
|
|
35
|
Ling C, Zuo M, Alvarez-Buylla A, Cheng MF. Neurogenesis in juvenile and adult ring doves. J Comp Neurol 1997; 379:300-12. [PMID: 9050792] [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: 02/03/2023]
Abstract
Studies in songbirds suggest that neurogenesis during the first few years of life is related to song learning. In this study, we examined whether postnatal neurogenesis occurs in a nonsongbird, the ring dove (Streptoplia risoria), and whether it persists to old age. Twenty-four hours after a single intramuscular injection of [3H]thymidine, labeled cells were present in the brains, particularly in the lateral wall of the lateral ventricle of juvenile (3-month and 8-month) and adult (1-year to 8-year) doves. Two months after multiple [3H]thymidine injections, there were fewer labeled cells in the ventricular zone (VZ), but many labeled cells with neuronal morphology in the parenchyma of the forebrain; labeled cells were confirmed as neurons by using neuron-specific markers, microtubule-associated protein-2 (MAP-2) and anti-neuronal nucleus (NeuN). In general, new neurons were distributed in the forebrain without clustering in any particular nucleus. During the first year of life, however, neostriatum caudale and hyperstriatum, the regions known to be essential for proper integration of sensory cues and reproductive behavior, contained more new neurons than any other brain regions. These neuronal additions showed an age-related decline; the first reduction coincided with the dove's attainment of adult physical size (about 3 months old) and the second occurred when the dove would normally attain reproductive fitness (about 1 year old). A low level of forebrain neurogenesis persisted up to 8 years of age (the oldest animals studied). These observations suggest that neurogenesis in adulthood is widespread among birds but that the biological significance of adult neurogenesis in the ring dove remains to be determined.
Collapse
Affiliation(s)
- C Ling
- Department of Brain & Cognitive Science, Massachusetts Institute of Technology, Cambridge 02139, USA
| | | | | | | |
Collapse
|
36
|
Cheng MF, Zuo M. Proposed pathways for vocal self-stimulation: met-enkephalinergic projections linking the midbrain vocal nucleus, auditory-responsive thalamic regions and neurosecretory hypothalamus. J Neurobiol 1994; 25:361-79. [PMID: 8077963 DOI: 10.1002/neu.480250403] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In this study, we have investigated the neuroanatomical pathways that may underlie the influence of a female bird's vocal behavior upon her own reproductive endocrine response. We traced the ascending efferent projections of the midbrain vocal control nucleus, the intercollicularis (ICo), using an anterograde tracer, PHAL, delivered by iontophoretic application. We found labelled terminal fields in the anterior regions of the hypothalamus that contained luteinizing hormone releasing hormone- (LHRH) immunoreactive neurons. We injected into the LHRH-rich anterior medial hypothalamus (AM) the retrograde tracer, fluoro-gold, to verify the results of PHAL anterograde tracing and examine whether retrogradely labelled neurons in the ICo can be stained with met-enkephalin antiserum by the immunohistochemical method. Of the retrogradely labelled neurons in the medial division of ICo (mICo), between 5% and 15% were found to be met-enkephalin-immunoreactive positive perikarya. Our data suggest that axonal projections into the anterior medial hypothalamus may arise in part from enkephalin-immunoreactive neurons in the medial ICo. The mICo neurons distributed along the medial border of the midbrain auditory nucleus give rise to projections into the posterior medial hypothalamus (PMH) via synapses within the shell region of thalamic auditory nucleus, ovoidalis (Ov). We conclude that in the ring dove, the medial division of the vocal control nucleus, by virtue of its connection with the auditory thalamus and neurosecretory hypothalamus, is in a position to exert influence on endocrine response partly through enkephalinergic systems. Implications of similar connections in other species are discussed.
Collapse
Affiliation(s)
- M F Cheng
- Institute of Animal Behavior, Rutgers University, Newark, New Jersey 07102
| | | |
Collapse
|
37
|
Bernstein PL, Zuo M, Cheng MF. Social condition affects the courtship behavior of male ring doves with posterior medial hypothalamic lesions. Behav Neural Biol 1993; 59:120-5. [PMID: 8476379 DOI: 10.1016/0163-1047(93)90834-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Following bilateral lesions to the posterior medial hypothalamus (homologue of the mammalian ventromedial nucleus), adult male ring doves regain full courtship behavior and the ability to stimulate female egg-laying when housed continuously with females. Males with PMH lesions housed singly and only tested periodically with females continue to show deficits in courtship. These findings suggest that the social environment present in adulthood itself can directly influence recovery from brain lesions. They also demonstrate the importance of PMH in the mediation of male ring dove courtship behavior.
Collapse
Affiliation(s)
- P L Bernstein
- Institute of Animal Behavior, Rutgers University, Newark, New Jersey 07102
| | | | | |
Collapse
|
38
|
Zuo M, Karras D, Hümpel M. Influence of protein binding on the metabolic clearance rate of synthetic progestins in the rat liver perfusion model. Arzneimittelforschung 1992; 42:1130-8. [PMID: 1445481] [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: 12/27/2022]
Abstract
Levonorgestrel (LN), 3-Keto-desogestrel (KDG), norethisterone (NET), and gestodene (GST) were investigated in the recirculating rat liver perfusion model. Progestins were dissolved in buffered salt solution (MI), BSA containing (MII) or HSA and sex hormone binding globulin (SHBG) containing medium (MIII) at a concentration of about 60 ng/ml. Each 3-5 female rat livers were perfused with MI, MII, and MIII for 1 h. Perfusion medium, liver biopsies and total bile were analyzed for progestin levels by specific radioimmunoassays. Protein binding characteristics were determined in media and tissue. In all experiments bile (remaining liver) contained less than 1% (3%) of respective progestin dose demonstrating an almost complete biotransformation of all drugs by rat livers, irrespective of used medium. With MI, metabolic clearance rates (MCRs) and half-lives (t1/2) were not different for the four progestins. With MII, the actual progestin levels were generally higher than with MI, but half-lives were not changed. MCRs were close to the perfusion rate at the start of experiments but decreased to about 50%. MCRs of free and total drug levels were identical. Protein binding of 70-80% did not change with time. With MIII, the half-lives increased 1.5 fold (NET), 2.8 fold (KDG), 3.1 fold (GST) and 3.2 fold (LN) and MCRs accounted for 50-70% of perfusion rate at the beginning. The time courses of further MCR decreases were different for the various progestins and can be attributed to differences in specific binding of drugs to SHBG. Clearly, the presence of SHBG in MIII induced a shift of drug from liver tissue into the perfusion medium.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- M Zuo
- Institute of Pharmacokinetics, Schering Aktiengesellschaft, Berlin/Bergkamen, Fed. Rep. of Germany
| | | | | |
Collapse
|
39
|
Jiang TY, Zuo M, Vukovic L, Bederson B. Absolute cross sections for low-energy scattering of electrons by excited sodium. Phys Rev Lett 1992; 68:915-918. [PMID: 10046031 DOI: 10.1103/physrevlett.68.915] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
40
|
Zuo M, Jiang TY, Vukovic L, Bederson B. Absolute elastic differential cross sections of electrons scattered by 3 (2)P3/2 sodium. Phys Rev A 1990; 41:2489-2499. [PMID: 9903381 DOI: 10.1103/physreva.41.2489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
41
|
Vukovic L, Zuo M, Shen GF, Stumpf B, Bederson B. Scattering of electrons by alkali-halide molecules: LiBr and CsCl. Phys Rev A Gen Phys 1989; 40:133-149. [PMID: 9901877 DOI: 10.1103/physreva.40.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|