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Zong Z, Hu CG, Zhou TC, Yu ZM, Tang FX, Tian HK, Li H, Wang H. Nine-long non-coding ribonucleic acid signature can improve the survival prediction of colorectal cancer. World J Gastrointest Surg 2021; 13:210-221. [PMID: 33643540 PMCID: PMC7898191 DOI: 10.4240/wjgs.v13.i2.210] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 11/30/2020] [Accepted: 12/17/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Investigating molecular biomarkers that accurately predict prognosis is of considerable clinical significance. Accumulating evidence suggests that long non-coding ribonucleic acids (lncRNAs) are frequently aberrantly expressed in colorectal cancer (CRC).
AIM To elucidate the prognostic function of multiple lncRNAs serving as biomarkers in CRC.
METHODS We performed lncRNA expression profiling using the lncRNA mining approach in large CRC cohorts from The Cancer Genome Atlas (TCGA) database. Receiver operating characteristic analysis was performed to identify the optimal cutoff point at which patients could be classified into the high-risk or low-risk groups. Based on the Cox coefficient of the individual lncRNAs, we identified a nine-lncRNA signature that was associated with the survival of CRC patients in the training set (n = 175). The prognostic value of this nine-lncRNA signature was validated in the testing set (n = 174) and TCGA set (n = 349). The prognostic models, consisting of these nine CRC-specific lncRNAs, performed well for risk stratification in the testing set and TCGA set. Time-dependent receiver operating characteristic analysis indicated that this predictive model had good performance.
RESULTS Multivariate Cox regression and stratification analysis demonstrated that this nine-lncRNA signature was independent of other clinical features in predicting overall survival. Functional enrichment analysis of Kyoto Encyclopedia of Genes and Genomes pathways and Gene Ontology terms further indicated that these nine prognostic lncRNAs were closely associated with carcinogenesis-associated pathways and biological functions in CRC.
CONCLUSION A nine-lncRNA expression signature was identified and validated that could improve the prognosis prediction of CRC, thereby providing potential prognostic biomarkers and efficient therapeutic targets for patients with CRC.
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Affiliation(s)
- Zhen Zong
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Ce-Gui Hu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Tai-Cheng Zhou
- Department of Gastrointestinal Surgery and Hernia Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou 510655, Guangdong Province, China
| | - Zhuo-Min Yu
- Department of Gastrointestinal Surgery and Hernia Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou 510655, Guangdong Province, China
| | - Fu-Xin Tang
- Department of Gastrointestinal Surgery and Hernia Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou 510655, Guangdong Province, China
| | - Hua-Kai Tian
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Hui Li
- Department of Rheumatology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - He Wang
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
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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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3
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Zong Z, Li H, Yu ZM, Tang FX, Zhu XJ, Tian HK, Zhou TC, Wang H. Prognostic thirteen-long non-coding RNAs (IncRNAs) could improve the survival prediction of gastric cancer. Gastroenterología y Hepatología 2020; 43:598-606. [DOI: 10.1016/j.gastrohep.2020.01.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/20/2020] [Accepted: 01/23/2020] [Indexed: 12/24/2022]
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Abstract
Background The Chromobox (CBX) protein family, which is a crucial part of the epigenetic regulatory complex, plays an important role in the occurrence and development of cancer; however, the function and prognostic value of CBX family members in gastric cancer is not clear. Methods we investigated the relationship between CBX members and gastric cancer using a range of tools and databases: Oncomine, Kaplan-Meier plotter, cBioPortal, ULCAN, Metascape, and GEPIA. Results The results showed that, relative to normal gastric tissue, mRNA expression levels of CBX1-6 were significantly higher in gastric cancer tissue, whereas the level of CBX7 was significantly lower. Furthermore, overexpression of CBX3-6 and underexpression of CBX7 mRNAs was significantly related to the poor prognosis and survival of gastric cancer patients, making these CBX family members useful biomarkers. Finally, overexpression of CBX1 mRNA was significantly related to the poor prognosis of gastric cancer patients treated with adjuvant 5-fluorouracil-based chemotherapy. Conclusions The members of the CBX family can be used as prognosis and survival biomarkers for gastric cancer and CBX1 may be a biomarker for choosing the chemotherapy regimen of gastric cancer patients.
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Affiliation(s)
- Tao Ma
- Department of Gastrointestinal Surgery and Hernia Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Ning Ma
- Department of Gastrointestinal Surgery and Hernia Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Jia-Lin Chen
- Department of Gastrointestinal Surgery and Hernia Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Fu-Xin Tang
- Department of Gastrointestinal Surgery and Hernia Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Zhen Zong
- Department of Gastrointestinal Surgery, the Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhuo-Min Yu
- Department of Gastrointestinal Surgery and Hernia Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Shuang Chen
- Department of Gastrointestinal Surgery and Hernia Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
| | - Tai-Cheng Zhou
- Department of Gastrointestinal Surgery and Hernia Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou, China
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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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6
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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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7
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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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8
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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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9
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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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12
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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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13
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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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14
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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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15
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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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16
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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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17
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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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