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Yu ZM, Hou ZH, Zong Z, Jiang ZP, Zhou TC, Ma N, Chen JL, Chen S. [Combined minimally invasive treatment of chronic giant inguinal hernia]. Zhonghua Wei Chang Wai Ke Za Zhi 2021; 23:1216-1219. [PMID: 33353282 DOI: 10.3760/cma.j.cn.441530-20190903-00336] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Yu ZM, Ma N, Chen JL, Jiang ZP, Li YR, Hou ZH, Gan WC, Zhou TC, Chen S. [Intestinal obstruction caused by broad ligament hernia: a case report]. Zhonghua Wei Chang Wai Ke Za Zhi 2020; 23:319-320. [PMID: 32192315 DOI: 10.3760/cma.j.cn.441530-20200306-00128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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Meng LB, Zou YF, Shan MJ, Zhang M, Qi RM, Yu ZM, Guo P, Zheng QW, Gong T. Computer-assisted prediction of atherosclerotic intimal thickness based on weight of adrenal gland, interleukin-6 concentration, and neural networks. J Int Med Res 2019; 48:300060519839625. [PMID: 31039661 PMCID: PMC7140207 DOI: 10.1177/0300060519839625] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Objective Methods Results Conclusions
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Affiliation(s)
- Ling-Bing Meng
- Neurology Department, Beijing Hospital, National Center of Gerontology, Beijing, P.R. China.,*These authors contributed equally to this work
| | - Yang-Fan Zou
- Department of Neurosurgery, Chinese PLA General Hospital-Sixth Medical Center, Beijing, P.R. China.,*These authors contributed equally to this work
| | - Meng-Jie Shan
- MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R. China
| | - Meng Zhang
- School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding, Hebei, P.R. China
| | - Ruo-Mei Qi
- MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing, P.R. China
| | - Ze-Mou Yu
- Department of Neurology, Peking University First Hospital, Beijing, P. R. China
| | - Peng Guo
- Department of Orthopedics, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Qian-Wei Zheng
- Neurology Department, Beijing Hospital, National Center of Gerontology, Beijing, P.R. China
| | - Tao Gong
- Neurology Department, Beijing Hospital, National Center of Gerontology, Beijing, P.R. China
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Abstract
Objective Chronic stress may lead to augmented incidence rates of coronary and
cerebrovascular diseases associated with atherosclerosis. However, few
studies have focused on the effect of chronic stress on atherosclerosis
plaque formation. Therefore, this study was designed to directly evaluate
how chronic stress affects atherosclerosis. Methods Thirty rabbits were divided into three groups: the control group,
balloon-injury operation + high-fat diet model group, and chronic
stress + balloon-injury operation + high-fat diet model group. Physical and
social stress were induced, and proteomic methods were applied to identify
specific markers. Results After protein determination, the chronic stress + balloon-injury
operation + high-fat diet model group exhibited significant upregulation of
the following apoptosis-related proteins: UBE2K, caspase 3, caspase 9, BAX,
P53, and FAS. In particular, real-time polymerase chain reaction showed that
the protein expression of caspase 9 was significantly downregulated in the
stress group compared with the non-stress groups. However, the other
proteins showed significantly increased expression in the stress group. Conclusion Chronic stress may promote cell apoptosis in the physiopathologic process of
atherosclerosis.
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Affiliation(s)
- Ling-Bing Meng
- Neurology Department, Beijing Hospital, National Center of Gerontology, Dong Dan, Beijing, China
| | - Meng-Jie Shan
- MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ze-Mou Yu
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Jian Lv
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Ruo-Mei Qi
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Dong Dan, Beijing, China
| | - Peng Guo
- Department of Orthopedics, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Yuan-Meng Zhang
- Internal Medicine Department, Jinzhou Medical University, Liaoning, China
| | - Tao Gong
- Neurology Department, Beijing Hospital, National Center of Gerontology, Dong Dan, Beijing, China
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Sweeney E, Cui Y, DeClercq V, Devichand P, Forbes C, Grandy S, Hicks JMT, Keats M, Parker L, Thompson D, Volodarsky M, Yu ZM, Dummer TJB. Cohort Profile: The Atlantic Partnership for Tomorrow's Health (Atlantic PATH) Study. Int J Epidemiol 2018; 46:1762-1763i. [PMID: 29025120 DOI: 10.1093/ije/dyx124] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/23/2017] [Indexed: 11/14/2022] Open
Affiliation(s)
- E Sweeney
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - Y Cui
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - V DeClercq
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - P Devichand
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - C Forbes
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - S Grandy
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - J M T Hicks
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - M Keats
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - L Parker
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - D Thompson
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - M Volodarsky
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - Z M Yu
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
| | - T J B Dummer
- Atlantic PATH, Dalhousie University, Halifax, NS, Canada
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Yu ZM, Deng XT, Qi RM, Xiao LY, Yang CQ, Gong T. Mechanism of Chronic Stress-induced Reduced Atherosclerotic Medial Area and Increased Plaque Instability in Rabbit Models of Chronic Stress. Chin Med J (Engl) 2018; 131:161-170. [PMID: 29336364 PMCID: PMC5776846 DOI: 10.4103/0366-6999.222322] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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] [Indexed: 11/16/2022] Open
Abstract
Background: Chronic stress contributes to increased risks of atherosclerotic diseases including heart disease, stroke, and transient ischemic attack. However, its underline mechanisms are poorly understood. This study aimed to elucidate the mechanism via which chronic stress exerts its effect on atherosclerosis (AS). Methods: Fifty male New Zealand white rabbits were used. Aortic balloon-injury model was applied. Both social stress and physical stress methods were adopted to establish chronic stress models. The lumen stenotic degree, intimal and medial areas, maximum fibrous cap thickness, and plaque contents were measured with histological sections. Proteomic methods were applied to detect protein changes in abdominal aortas to identify the specialized mediators. Real-time reverse transcription-polymerase chain reaction was used for further verification and investigation. Results: The stress rabbits exhibited lower body weight, worse fur state, more inactivity behavior, and higher serum cortisol level. Chronic stress was significantly associated with the decreased medial area and increased plaque instability, which was manifested by thinner fibrous caps, larger lipid cores, more macrophages, and new vessels but fewer smooth muscle cells and elastic fibers. After chronic stress, the apoptosis-related genes UBE2K, BAX, FAS, Caspase 3, Caspase 9, and P53 were upregulated, and BCL-2/BAX was down-regulated; the angiogenesis-related genes ANG and VEGF-A were also highly expressed in atherosclerotic arteries. Conclusions: Rabbit models of chronic stress were successfully established by applying both social stress and physical stress for 8 weeks. Chronic stress can reduce AS tunica media and accelerate plaque instability by promoting apoptosis and neovascularization.
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Affiliation(s)
- Ze-Mou Yu
- Department of Neurology, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - Xiao-Tao Deng
- Department of Radiology, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - Ruo-Mei Qi
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - Lu-Yan Xiao
- Department of Laboratory, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - Chong-Qing Yang
- Department of Pathology, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - Tao Gong
- Department of Neurology, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
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Meng LB, Yu ZM, Guo P, Wang QQ, Qi RM, Shan MJ, Lv J, Gong T. Neutrophils and neutrophil-lymphocyte ratio: Inflammatory markers associated with intimal-media thickness of atherosclerosis. Thromb Res 2018; 170:45-52. [PMID: 30118867 DOI: 10.1016/j.thromres.2018.08.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [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: 05/30/2018] [Revised: 07/16/2018] [Accepted: 08/02/2018] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Cardiac-cerebral vascular diseases (CCVDs) are global health problems due to the characteristic of high mortality. It is found that atherosclerosis (AS), a main cause of CCVDs, is significantly relevant to the change of intimal and media thickness. Neutrophil count (NEU) and neutrophil-lymphocyte ratio (N/L) are recognized possible risk factors for atherosclerosis (AS). However, there are few studies on the separate relationship between carotid intimal thickness, media thickness and NEU, N/L. This study explored the respective effects of NEU and N/L on AS and intimal, media thickness. MATERIALS AND METHODS The χ2, Spearman's rho test, and multiple linear regression were implemented to analyze the relevance between blood parameters and intimal-media thickness. The potential factors, affecting non-depression time (NDT), is identified by univariate Cox regression. ROC curve was performed to determine the ability of blood parameters to predict intimal-media thickness. Immunohistochemistry was implemented. RESULTS AND CONCLUSION Based on χ2, Spearman's rho test and multiple linear regression, NEU is related with intimal thickness (P < 0.05). Furthermore, NEU can predict the intimal thickness through the ROC curve. What's more, N/L is a risk factor of carotid media thickness (P < 0.05) by the Spearman's rho test, and is also correlated with poor NDT (P < 0.05) based on univariate Cox proportional regression analysis. Through ROC curve, N/L can predict the carotid media thickness. The carotid atherosclerotic endarterium is richest in macrophagocytes, and the arrangement of endotheliocytes is disordered. In summary, the increased NEU and N/L respectively have a strong correlation and precise predictability for carotid intimal and media thickness of atherosclerosis.
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Affiliation(s)
- Ling-Bing Meng
- Neurology Department, Beijing Hospital, National Center of Gerontology, No. 1 Dahua Road, Dong Dan, Beijing 100730, PR China
| | - Ze-Mou Yu
- Department of Neurology, Peking University First Hospital, Beijing, PR China
| | - Peng Guo
- Department of Orthopedics, The Fourth Hospital of Hebei Medical University, PR China
| | - Qing-Qing Wang
- Department of Medical Oncology, Hebei Medical University, PR China
| | - Ruo-Mei Qi
- The MOH Key Laboratory of Geriatrics, Beijing Hospital, National Center of Gerontology, No. 1 Dahua Road, Dong Dan, Beijing 100730, PR China
| | - Meng-Jie Shan
- MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, PR China
| | - Jian Lv
- Second Department of Surgery, The Fourth Hospital of Hebei Medical University, 12 Jiankang Road, Shijiazhuang, Hebei 050011, PR China
| | - Tao Gong
- Neurology Department, Beijing Hospital, National Center of Gerontology, No. 1 Dahua Road, Dong Dan, Beijing 100730, PR China.
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Wu LM, Wu XF, Yu ZM, Liu Y. [Systematic review on orofacial myofunctional therapy to treat obstructive sleep apnea-hypopnea syndrome]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:1774-1777. [PMID: 29798198 DOI: 10.13201/j.issn.1001-1781.2017.22.019] [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: 08/17/2017] [Indexed: 11/12/2022]
Abstract
Obstructive sleep apnea-hypopnea syndrome (OSAHS) is an important risk factor for cardiovascular and cerebrovascular diseases. The widespread collapse of the airway, which can't maintain its normal position and structure, is an important cause of OSAHS. Noninvasive ventilator-assisted ventilation is the preferred treatment for OSAHS, but there are shortcomings of poor compliance. Orofacial myofunctional therapy (OMT) is a noninvasive, simple, low-cost, low-risk therapy that is expected to replace noninvasive ventilator-assisted ventilation to a certain extent. So far, there is little Chinese literature on OMT, especially no training methods in Chinese version. Therefore, this paper systematically reviewed anatomical abnormalities and pathology of OSAHS, possible treatment mechanism of OMT and related research progress. And we translated two kinds of training method of OMT (Guimarase's and Hemmat Baz's) into Chinese for researchers and clinicians' reference, which is widely cited in foreign literature.
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Affiliation(s)
- L M Wu
- The First Clinical Medical College of Guangzhou University of Chinese Medicine
| | - X F Wu
- The first Affiliated Hospital of Guangzhou University of Chinese Medicine
| | - Z M Yu
- The first Affiliated Hospital of Guangzhou University of Chinese Medicine
| | - Y Liu
- The first Affiliated Hospital of Guangzhou University of Chinese Medicine
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Yu ZM, Li W, Yang CQ, Song Y, Wang DY, Liu FG, Gong T. Paraneoplastic Limbic Encephalitis in a Male with Nasopharyngeal Carcinoma. Chin Med J (Engl) 2016; 129:1253-4. [PMID: 27174340 PMCID: PMC4878177 DOI: 10.4103/0366-6999.181962] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Ze-Mou Yu
- Department of Neurology, Beijing Hospital, Beijing 100730, China
| | - Wei Li
- Department of Neurology, Beijing Hospital, Beijing 100730, China
| | - Chong-Qing Yang
- Department of Pathology, Beijing Hospital, Beijing 100730, China
| | - Yan Song
- Department of Radiology, Beijing Hospital, Beijing 100730, China
| | - Ding-Yi Wang
- Department of Respiration, Beijing Hospital, Beijing 100730, China
| | - Fu-Geng Liu
- Department of Radiotherapy, Beijing Hospital, Beijing100730, China
| | - Tao Gong
- Department of Neurology, Beijing Hospital, Beijing 100730, China
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Dummer TJB, Yu ZM, Nauta L, Murimboh JD, Parker L. Geostatistical modelling of arsenic in drinking water wells and related toenail arsenic concentrations across Nova Scotia, Canada. Sci Total Environ 2015; 505:1248-58. [PMID: 24613511 DOI: 10.1016/j.scitotenv.2014.02.055] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 01/23/2014] [Accepted: 02/10/2014] [Indexed: 05/21/2023]
Abstract
Arsenic is a naturally occurring class 1 human carcinogen that is widespread in private drinking water wells throughout the province of Nova Scotia in Canada. In this paper we explore the spatial variation in toenail arsenic concentrations (arsenic body burden) in Nova Scotia. We describe the regional distribution of arsenic concentrations in private well water supplies in the province, and evaluate the geological and environmental features associated with higher levels of arsenic in well water. We develop geostatistical process models to predict high toenail arsenic concentrations and high well water arsenic concentrations, which have utility for studies where no direct measurements of arsenic body burden or arsenic exposure are available. 892 men and women who participated in the Atlantic Partnership for Tomorrow's Health Project provided both drinking water and toenail clipping samples. Information on socio-demographic, lifestyle and health factors was obtained with a set of standardized questionnaires. Anthropometric indices and arsenic concentrations in drinking water and toenails were measured. In addition, data on arsenic concentrations in 10,498 private wells were provided by the Nova Scotia Department of Environment. We utilised stepwise multivariable logistic regression modelling to develop separate statistical models to: a) predict high toenail arsenic concentrations (defined as toenail arsenic levels ≥0.12 μg g(-1)) and b) predict high well water arsenic concentrations (defined as well water arsenic levels ≥5.0 μg L(-1)). We found that the geological and environmental information that predicted well water arsenic concentrations can also be used to accurately predict toenail arsenic concentrations. We conclude that geological and environmental factors contributing to arsenic contamination in well water are the major contributing influences on arsenic body burden among Nova Scotia residents. Further studies are warranted to assess appropriate intervention strategies for reducing arsenic body burden among human populations.
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Affiliation(s)
- T J B Dummer
- Population Cancer Research Program, Department of Pediatrics, Dalhousie University, Halifax, NS, Canada.
| | - Z M Yu
- Population Cancer Research Program, Department of Pediatrics, Dalhousie University, Halifax, NS, Canada
| | - L Nauta
- Population Cancer Research Program, Department of Pediatrics, Dalhousie University, Halifax, NS, Canada
| | - J D Murimboh
- Department of Chemistry, Acadia University, Wolfville, NS, Canada
| | - L Parker
- Population Cancer Research Program, Department of Pediatrics, Dalhousie University, Halifax, NS, Canada
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Zhao FJ, Zhang S, Yu ZM, Xia SJ, Li H. Specific targeting of prostate cancer cells in vitro by the suicide gene/prodrug system, uracil phosphoribosyltransferase/5-fluorouracil, under the control of prostate-specific membrane antigen promoter/enhancer. Prostate Cancer Prostatic Dis 2008; 12:166-71. [PMID: 18626508 DOI: 10.1038/pcan.2008.39] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This study was designed to investigate the prostate cancer-specific tumoricidal effect of the suicide gene, Escherichia coli uracil phosphoribosyltransferase (UPRT), driven by the human prostate-specific membrane antigen promoter/enhancer (PSMA(E/P)) in vitro. When transfected with PSMA(E/P)-EGFP (enhanced green fluorescence protein) (a plasmid construct with the green fluorescence protein gene driven by the PSMA(E/P)), only the androgen-responsive and PSMA-positive prostate cancer cell line, LNCaP, expressed GFP, indicating the specificity of the PSMA(E/P) activity in androgen-sensitive and PSMA-positive prostate cancer cells. Taking advantage of this prostate cancer-specific property of PSMA(E/P), we successfully introduced bacterial UPRT into LNCaP cells where the tumoricidal effect of 5-fluorouracil (5-FU) was significantly increased when compared with the cells without the exogenous UPRT. We conclude that the efficacy of 5-FU-based chemotherapy in prostate cancers can be significantly improved by targeted expression of the suicide gene UPRT under the control of PSMA(E/P).
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Affiliation(s)
- F J Zhao
- Department of Urology, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
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Abstract
Two new guaianolides, namely, 3beta,8alpha-dihydroxy-13-methoxyl-4(14),10(15)-dien-(1alphaH,5alphaH,6beta H,11betaH)-12,6-olide (1) and 3beta,8alpha-dihydroxy-13-methoxyl-4(14),10(15)-dien-(1alphaH,5alphaH,6beta H,11alphaH)-12,6-olide (2), together with six known guaianolides, 8-hydroxyzaluzanin C, austricin, chlorojanerin, cynaropicrin, chlorohyssopifolin E and chlorohyssopifolin A were isolated from the aerial parts of Saussurea alata. The structures were established mainly based on spectral analysis, especially 2D NMR techniques.
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Affiliation(s)
- G Ren
- Research Centre of Siyuan Natural Pharmacy and Bio-toxicity, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
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Zheng TL, Su JQ, Maskaoui K, Yu ZM, Hu Z, Xu JS, Hong HS. Microbial modulation in the biomass and toxin production of a red-tide causing alga. Mar Pollut Bull 2005; 51:1018-25. [PMID: 16291201 DOI: 10.1016/j.marpolbul.2005.02.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/11/2005] [Indexed: 05/05/2023]
Abstract
The effect of S10, a strain of marine bacteria isolated from sediment in the Western Xiamen Sea, on the growth and paralytic shellfish poison (PSP) production in the alga Alexandrium tamarense (A. tamarense) was studied under controlled experimental conditions. The results of these experiments have shown that the growth of A. tamarense is obviously inhibited by S10 at high concentrations, however no evident effect on its growth was observed at low concentrations. Its PSP production was also inhibited by S10 at different concentrations, especially at low concentrations. The toxicity of this strain of A. tamarense is about (0.95-12.14) x 10(-6) MU/cell, a peak toxicity value of 12.14 x 10(-6) MU/cell appeared on the 14th day, after which levels decreased gradually. The alga grew well in conditions of pH 6-8 and salinities of 20-34 per thousand. The toxicity of the alga varied markedly at different pH and salinity levels. Toxicity decreased as pH increased, while it increased with salinity and reached a peak value at a salinity of 30 per thousand, after which it declined gradually. S10 at a concentration of 1.02 x 10(9) cells/ml inhibited growth and the PSP production of A. tamarense at different pH and salinity levels. S10 had the strongest inhibitory function on the growth of A. tamarense under conditions of pH 7 and a salinity of 34 per thousand. The best inhibitory effect on PSP production by A. tamarense was at pH 7, this inhibitory effect on PSP production did not relate to salinity. Interactions between marine bacteria and A. tamarense were also investigated using the flow cytometer technique (FCM) as well as direct microscope counting. S10 was identified as being a member of the genus Bacillus, the difference in 16S rDNA between S10 and Bacillus halmapalus was only 2%. The mechanism involved in the inhibition of growth and PSP production of A. tamarense by this strain of marine bacteria, and the prospect of using it and other marine bacteria in the bio-control of red-tides was discussed.
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Affiliation(s)
- T L Zheng
- School of Life Sciences, Xiamen University, Xiamen 361005, China.
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14
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Wu X, Huang WQ, Zhang QQ, Yu ZM. Effects of histamine on electrophysiological properties and triggered activity in guinea pig papillary muscles. Methods Find Exp Clin Pharmacol 1994; 16:583-587. [PMID: 7760583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The effects of histamine on action potentials (APs) and on early afterdepolarizations (EADs) were studied with standard microelectrode and computer in guinea pig papillary muscles. Experiments offer evidence that histamine (6.0 mumol/l) results in a significant diminution in action potential duration at 50% repolarization (APD50) and 90% repolarization (APD90) (data taken from no abnormal automaticity and oscillatory potential cells, 10 out of 19 preparations). Particularly, histamine can induce EADs (about 58%), oscillatory potentials and triggered activity. EADs frequently occur at low stimulation rates of 0.2-1.0 Hz and with prolongation of the action potential duration. EAD-induced triggered activity may exhibit fast spontaneous APs. Cimetidine (10 mumol/l, n = 6), an H2-receptor antagonist, antagonizes the effects of histamine. In the presence of cimetidine no EADs are observed by perfusing histamine. An H1-receptor antagonist, chlorpheniramine (10 mumol/l, n = 9), has no effect on the alterations of APs induced by histamine in ventricular myocardium. The results suggest that the mechanisms of histamine-induced shortness of AP duration, EADs and triggered activity may be related to the H2 receptor-mediated enhancement of the slow inward calcium current.
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Affiliation(s)
- X Wu
- Department of Physiology, Nantong Medical College, P.R. China
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15
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Huang WQ, Xu HD, Wu X, Xu B, Yu ZM. [Role of the central alpha-receptors in the modulation of carotid sinus reflex of rats]. Sheng Li Xue Bao 1992; 44:556-61. [PMID: 1338814] [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: 12/26/2022]
Abstract
To investigate the effects of the central alpha-receptors on the carotid sinus reflex, phenoxybenzamine (PBZ, 2 micrograms/20 microliters) or yohimbine (Y, 2 micrograms/20 microliters) was injected into the lateral cerebral ventricle (LCV) and intracarotid sinus pressure (ISP)-mean arterial pressure (MAP) relationship curve was constructed and fitted by a Logistic function. The results were as follows: (1) After injection of PBZ into LCV, the ISP-MAP relationship curve shifted upward at a higher ISP level with decreased peak slope and MAP range while the ISP-slope curve shifted downward. (2) After injection of Y into LCV, the ISP-MAP relationship curve shifted upward at a higher ISP level with decreased peak slope and MAP range and increased threshold. The ISP-slope curve shifted downward significantly at 10.64, 15.96 kPa. The peak slope and MAP range of Y group decreased significantly as compared with that of the PBZ group. These results indicated that after blockage of central alpha-receptors the sensitivity of the sinus reflex decreased significantly, and the blockage action of alpha 2-receptor is greater than that of alpha 1-receptor.
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Affiliation(s)
- W Q Huang
- Department of Physiology, Suzhou Medical College
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16
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Xu HD, Huang WQ, Zhao WW, Xu B, Yu ZM. [Effect of the central noradrenergic system on carotid sinus reflex in rats]. Sheng Li Xue Bao 1992; 44:127-32. [PMID: 1621105] [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
In order to study the effect of central noradrenergic system on the regulation of mean arterial pressure (MAP) by intracarotid sinus pressure (ISP), ISP-MAP relationship curves were constructed using isolated carotid sinus under the condition of injection of 6-OHDA (200 micrograms) into lateral ventricle or cauterization of locus coeruleus (LC) and compared with that obtained under the condition of control. All ISP-MAP curves can be fitted by a logistic functional plot whose characteristics can be defined by two parameters, i.e. coordinates of the inversion point of the slope of the curve and the MAP range related to the rate of change of slope factor with which carotid sinus pressure exerts its control. The results were as follows: After injection of 6-OHDA, the rate of change of the slope of the ISP-MAP curve is considerably slower than that of the normal control, thus showing a much compressed range of MAP by ISP, while the abscissa (i.e. position of ISP) of the slope inversion point of the curve shows practically no change. In comparison with the control, cauterization of LC causes a similar but less striking change of ISP-MAP curve than that of 6-OHDA injection experiment. All such differences were illustrated in Fig. 3. The above results indicated that the central noradrenergic system facilitates carotid sinus reflex and LC plays a dominant role.
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Affiliation(s)
- H D Xu
- Department of Physiology, Suzhou Medical College
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Zhou K, Yu ZM. [Keshan disease and the selenium content of grains in Yunnan province]. Zhonghua Yu Fang Yi Xue Za Zhi 1992; 26:16-8. [PMID: 1606866] [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
The selenium content of 518 specimens of rice, wheat, maize, soybean and highland barley growing both in Keshan disease area and other places in Yunnan Province, was determined and it was found that the average selenium content of the grains in the Keshan disease area was lower than that in the other places. The selenium content of rice especially was much lower than that of wheat and soybean. The relationship of Keshan disease to the low selenium content of grains, especially rice, the most eaten grain by people in the disease area, seemed clearly established in Yunnan province as well.
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Affiliation(s)
- K Zhou
- Prevention, Cure and Research Centre of Keshan Disease, Yunnan Chuxiong
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Shen WQ, Xu XY, Zhao WW, Duan-Mu ZX, Yu ZM, Yu XM, Wang LY, Zhang LY. [Dynamic changes in depolarization of action potentials by high frequency stimulation in guinea pig papillary muscles]. Zhongguo Yao Li Xue Bao 1989; 10:332-5. [PMID: 2624118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The effect of high frequency stimulation on rate-dependent depression of depolarization of action potentials was studied with computer and standard microelectrode techniques in guinea pig papillary muscles. After increasing driving frequency from 0.5 to 6 Hz, decreases in Vmax, APA and OS were found. Changes of upstroke velocity during phase 0 between driving frequency 6 and 0.5 Hz could be described as a parabola. The rate-dependent depression of depolarization was exaggerated by tetrodotoxin (TTX), particularly during the accelerating period of phase 0. A progressive decline in Vmax, which could be fitted by a power function curve, was observed after changing driving frequency from 1 to 5 Hz. TTX significantly influenced the decline in Vmax and the regression coefficients in fitted equations.
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Bak YT, Yu ZM, Cho JY, Kim JH, Kim JG, Lee CH. Intramural hematoma of the esophagus: unusual complication of esophageal variceal sclerotherapy. Korean J Intern Med 1988; 3:92-4. [PMID: 3153802 PMCID: PMC4532125 DOI: 10.3904/kjim.1988.3.1.92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The authors report a case of esophageal hematoma in a 35-year-old man after esophageal variceal sclerotherapy with intravariceal injection of 5% ethanolamine oleate. A huge submucosal hematoma of the esophageal wall was demonstrated endoscopically and radiologically. Resolution occurred spontaneously after conservative treatment.
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