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Wang LP, Jiang LM, Wang SJ, Wu SJ, Huang ZQ, Shan PR, Huang WJ, Su L. [Animal study on left bundle branch current of injury and anatomic location of leads in His-purkinje conduction system pacing]. Zhonghua Xin Xue Guan Bing Za Zhi 2023; 51:1175-1180. [PMID: 37963753 DOI: 10.3760/cma.j.cn112148-20231007-00208] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Objective: Explore the relationship between tip of the left bundle branch pacing lead and anatomic location of left bundle branch as well as the mechanism of left bundle branch current of injury. To clarify the clinical value of left bundle branch current of injury during operation. Methods: The pacing leads were implanted in the hearts of two living swines. Intraoperative electrophysiological study confirmed that the left bundle branch or only the deep left ventricular septum was captured at low output. Immediately after operation, the gross specimen of swine hearts was stained with iodine to observe the gross distribution of His-purkinje conduction system on the left ventricular endocardium and its relationship with the leads. Subsequently, the swine hearts were fixed with formalin solution, and the pacing leads were removed after the positions were marked. The swine hearts were then sectioned and stained with Masson and Goldner trichrome, and the relationship between the anatomic location of the conduction system and the tip of the lead was observed under a light microscope. Results: After iodine staining of the specimen, the His-purkinje conduction system was observed with the naked eye in a net-like distribution, and the lead tip was screwed deeply and fixed in the left bundle branch area of the left ventricular subendocardium in the ventricular septum. Masson and Goldner trichrome staining showed that left bundle branch pacing lead directly passed through the left bundle branch when there was left bundle branch potential with left bundle branch current of injury, while it was not directly contact the left bundle branch when there was left bundle branch potential without left bundle branch current of injury. Conclusion: The left bundle branch current of injury observed on intracardiac electrocardiogram during His-purkinje conduction system pacing suggests that the pacing lead directly contacted the conduction bundle or its branches, therefore, the captured threshold was relatively low. Left bundle branch current of injury can be used as an important anatomic and electrophysiological evidence of left bundle branch capture.
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Affiliation(s)
- L P Wang
- Department of Cardiology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - L M Jiang
- Department of Cardiology, Sir Run Run Shaw Hospital, Affiliated Hospital of Medical School of Zhejiang University, Shaoxing 312399, China
| | - S J Wang
- Department of Cardiology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - S J Wu
- Department of Cardiology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Z Q Huang
- Department of Cardiology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - P R Shan
- Department of Cardiology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - W J Huang
- Department of Cardiology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - L Su
- Department of Cardiology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
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Zhu YJ, Li Y, Jiang J, Zhang W, Xue LY, Zhou AP, Jiang LM. [Predictive value of quantitative dynamic contrast-enhanced magnetic resonance imaging for the efficacy of neoadjuvant chemotherapy in locally advanced gastric cancer]. Zhonghua Zhong Liu Za Zhi 2019; 41:765-770. [PMID: 31648499 DOI: 10.3760/cma.j.issn.0253-3766.2019.10.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the predictive value of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) quantitative parameters for the efficacy of neoadjuvant chemotherapy in locally advanced gastric cancer. Methods: Sixty-five patients with locally advanced gastric cancer (LAGC) confirmed by gastroscopy and received neoadjuvant chemotherapy (NCT) were enrolled in this study. Quantitative DCE-MRI was performed before NCT, and the quantitative parameters were measured, including volume transfer constant (K(trans)), rate constant (K(ep)), volume fraction of extravascular extracellular space (V(e)) and volume fraction of plasma (V(p)). After NCT, all patients received radical gastrectomy. According to postoperative pathological tumor regression grade, patients were divided into response group and non-response group, and the differences of DCE quantitative parameters between the two groups were compared. ROC curve was utilized to analyze the predictive efficacy of DCE quantitative parameters for NCT response of LAGC, and multivariate logistic regression analysis was performed to analyze the predictive efficacy of combined parameters. Results: Thirty-seven patients were in response group and 28 patients were in non-response group. The pretreatment K(trans) in the response group were [0.216 min(-1) (0.130 min(-1), 0.252 min(-1))], significantly higher than [0.091 min(-1) (0.069 min(-1), 0.146 min(-1))] of non-response group (P<0.001), and V(e) in the response group were [0.354(0.228, 0.463)], significantly higher than [0.200(0.177, 0.253)]of non-response group (P<0.001). ROC analysis showed the AUCS of K(trans) and V(e) in predicting NCT efficacy were 0.881 and 0.756, respectively. Multiple logistic regression analysis showed that the combination of the two parameters could improve the AUC to 0.921, with the sensitivity and specificity of 86.5% and 89.3%, respectively. Conclusion: DCE-MRI quantitative parameters could help to predict the NCT response of LAGC, and the combination of parameters could improve the predictive efficacy.
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Affiliation(s)
- Y J Zhu
- Department of Imaging Diagnosis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y Li
- Department of Imaging Diagnosis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J Jiang
- Department of Imaging Diagnosis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - W Zhang
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - L Y Xue
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - A P Zhou
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - L M Jiang
- Department of Imaging Diagnosis, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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Zhang GJ, Lu LX, Jiang LM, Jiang L, Ian B. [Modeling of CO2 fluxes at cropland by using SiB3 model]. Huan Jing Ke Xue 2013; 34:4000-4008. [PMID: 24364323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The aim is to study the influence of different vegetation types on CO2 fluxes at the same site, taking farmland as the object by using the simple biosphere model (SiB3) , select different vegetation types in Suzhou Dongshan site as input parameters of model to simulate CO2 fluxes, and compare with the observational data in Suzhou Dongshan site during 2011-04-16 to 2011-06-30. Results show that using corn as the site vegetation type input model to simulate CO2 fluxes showed a very good diurnal variation agreement compared to the measured data, but selecting the ordinary crop type input model to simulate CO2 fluxes, CO2 fluxes during the daytime in April and May were undervalued, and CO2 fluxes in June were overvalued; when we select the tea type to input the model, the simulated results significantly overestimated CO2 fluxes during the daytime in May and June. In addition, when using SiB3 model to simulate the daily CO2 fluxes, all three vegetation types input model can effectively simulate daily CO2 fluxes, but not significantly. It shows that choosing the right type vegetation input SiB3 model can effectively simulate the diurnal variation of CO2 fluxes, but can not effectively improve the daily CO2 fluxes simulation.
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Affiliation(s)
- Geng-Jun Zhang
- State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China.
| | - Li-Xin Lu
- Cooperative Institute for Research in the Atmosphere, Colorado State University, CO 80523, USA
| | - Ling-Mei Jiang
- State Key Laboratory of Remote Sensing Science, Jointly Sponsored by Beijing Normal University and the Institute of Remote Sensing Applications of Chinese Academy of Sciences, Beijing 100875, China
| | - Lei Jiang
- State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China
| | - Baker Ian
- Department of Atmosphere Science, Colorado State University, CO 80523, USA
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Zhang YP, Jiang LM, Qiu YB, Wu SL, Shi JC, Zhang LX. [Study of the microwave emissivity characteristics over different land cover types]. Guang Pu Xue Yu Guang Pu Fen Xi 2010; 30:1446-1451. [PMID: 20707126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The microwave emissivity over land is very important for describing the characteristics of the lands, and it is also a key factor for retrieving the parameters of land and atmosphere. Different land covers have their emission behavior as a function of structure, water content, and surface roughness. In the present study the global land surface emissivities were calculated using six month (June, 2003-August, 2003, Dec, 2003-Feb, 2004) AMSR-E L2A brightness temperature, MODIS land surface temperature and the layered atmosphere temperature, and humidity and pressure profiles data retrieved from MODIS/Aqua under clear sky conditions. With the information of IGBP land cover types, "pure" pixels were used, which are defined when the fraction cover of each land type is larger than 85%. Then, the emissivity of sixteen land covers at different frequencies, polarization and their seasonal variation were analyzed respectively. The results show that the emissivity of vegetation including forests, grasslands and croplands is higher than that over bare soil, and the polarization difference of vegetation is smaller than that of bare soil. In summer, the emissivity of vegetation is relatively stable because it is in bloom, therefore the authors can use it as its emissivity in our microwave emissivity database over different land cover types. Furthermore, snow cover can heavily impact the change in land cover emissivity, especially in winter.
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Affiliation(s)
- Yong-Pan Zhang
- State Key Laboratory of Remote Sensing Science, School of Geography and Remote Sensing Science, Beijing Normal University, Beijing 100875, China.
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Li BS, Gu LJ, Luo CY, Li WS, Jiang LM, Shen SH, Jiang H, Shen SH, Zhang B, Chen J, Xue HL, Tang JY. The downregulation of asparagine synthetase expression can increase the sensitivity of cells resistant to L-asparaginase. Leukemia 2006; 20:2199-201. [PMID: 17039232 DOI: 10.1038/sj.leu.2404423] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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6
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Xuan SY, Jiang LM, Lu WH. [The significance of sIL-2R detection in various hepatic diseases]. Zhonghua Liu Xing Bing Xue Za Zhi 1997; 18:92-4. [PMID: 9812507] [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: 02/09/2023]
Abstract
To study the alteration of the level of sIL-2R in acute and chronic hepatic diseases and its relation between alteration and the extent of damage to liver, the level of sIL-2R with hepatic disease was measured by a monoclonal and polyclonal Antibody ELISA. The result showed that the level increased differently in various hepatic diseases. The level of sIL-2R decreased when turning into severe hepatitis, acute hepatitis, active cirrhosis, chronic active hepatitis, hepatocarcinoma, compensative cirrhosis, chronic persistent hepatitis. It was suggested that the level of sIL-2R be considered of clinical value to estimate the extent of damage to liver in patients with progressive liver damage.
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Affiliation(s)
- S Y Xuan
- Department of Infections Disease Qingdao Municipal Hospital
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7
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Sun X, Jiang LM. [Studies of several factors bearing on tissue culture of Fritillaria thunbergii Miq]. Zhongguo Zhong Yao Za Zhi 1992; 17:655-7, 702. [PMID: 1301750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- X Sun
- Zhejiang Institute of Chinese Materia Medica, Hangzhou
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Lee CM, Jiang LM, Shang HS, Hon PM, He Y, Wong HN. Prehispanolone, a novel platelet activating factor receptor antagonist from Leonurus heterophyllus. Br J Pharmacol 1991; 103:1719-24. [PMID: 1657264 PMCID: PMC1907812 DOI: 10.1111/j.1476-5381.1991.tb09853.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [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: 12/28/2022] Open
Abstract
1. Using an in vitro radioligand binding assay for the platelet activating factor (PAF) receptor, we have identified a novel, specific PAF antagonist, prehispanolone, from a Chinese medicinal herb Leonurus heterophyllus. 2. The presence of sodium ions inhibited specific [3H]-PAF binding to rabbit platelet membrane with an IC50 of 5.2 mM, decreased the inhibitory potency of PAF but increased the inhibitory potency of prehispanolone. 3. Prehispanolone and several of its derivatives inhibited the binding of [3H]-PAF to rabbit platelets with potencies closely resembling that of inhibition of PAF-induced aggregation. 4. The integrity of the tetrahydrofuran ring of prehispanolone is critical for its interaction with the PAF receptor. 5. By hydrogenating the dihydrofuran ring and replacing the keto group of prehispanolone with a hydroxyl group, we obtained a compound, LC5507, that is more stable and more active than prehispanolone as a PAF receptor antagonist.
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Affiliation(s)
- C M Lee
- Department of Biochemistry, Chinese Medicinal Material Research Centre, Shatin, N.T., Hong Kong
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Jiang LM. [Effects of rifamdin on pharmacokinetics of dexamethasone]. Zhonghua Jie He He Hu Xi Za Zhi 1990; 13:162-4, 191-2. [PMID: 2249321] [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: 12/31/2022]
Abstract
The rabbits of same sex and approximate weight, were randomly divided into following two groups: a group given all rifamdin for 12 days before dexamethasone injection and a control group without RFD. After a single IV injection of dexamethasone sodium phosphate, the concentrations of dexamethasone in rabbit plasma taken at 5, 15, 30 min, and 1, 2, 4, 8 h were analysed by reversed phase HPLC-UV. Linear regression analysis was made by LnC(t)-t. The pharmacokinetic parameters of dexamethasone in rabbits were calculated by methods of residuals. The results of main parameters, i.e. K10, beta, T1/2 beta, cls and AUD0-infinity kg-1 showed that rifamdin apparently promotes metabolic clearance of dexamethasone in plasma.
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