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1Spatio-temporal framework of tectonic uplift stages of the Tibetan Plateau in Cenozoic显示文摘Four intensive uplift periods, i.e., 60–35, 25–17 and 12–8 Ma (but 18–13 Ma in the Himalayas of the southern Tibet), and since about 5 Ma, can be determined on the Tibetan Plateau by synthetical analysis of low-temperature thermo-chronology data, sedimentary deposit records, and structural deformation records of different areas. The strong tectonic uplift periods in different areas on the Tibetan Plateau are penecontemporaneous, except for the Himalayan area of the southern Tibet, where a rapid uplift and exhumation period, controlled by the activity of the South Tibetan Detachment System faults, occurred during 18–13 Ma. These strong uplift and exhumation periods correspond well to intensive deformation activity periods, suggesting tectonically-controlled uplift and exhumation. The deposit records, such as the distribution of coarse clastic sediments, the distribution of tectonically-controlled basins, stratigraphic discontinuousness or unconformity, and fault-controlled geomorphologic evolution, also match well with the strong uplift and exhumation periods. Expanding processes of the plateau are also discussed.WANG GuoCan CAO Kai ZHANG KeXin WANG An LIU Chao MENG YanNing XU YaDong 2011Science China Earth Sciences2011,54,1:49
2Soil microbial biomass carbon and nitrogen in forest ecosystems of Northeast China:a comparison between natural secondary forest and larch plantation显示文摘Aims Natural secondary forest(NSF)and larch plantation are two of the predominant forest types in Northeast China.However,how the two types of forests compare in sustaining soil quality is not well understood.This study was conducted to determine how natural secondary forest and larch plantation would differ in soil microbial biomass and soil organic matter quality.Methods Microbial biomass carbon(MBC),microbial biomass nitrogen(MBN),soil organic carbon(SOC)and total nitrogen(TN)in the 0-to 15-cm and 15-to 30-cm soil layers were investigated by making chemical and biological measurements in the montane region of eastern Liaoning Province,Northeast China,during the growing season of 2008 in stands of NSF and Larix olgensis plantation(LOP).Important Findings We found that soil MBC and MBN were significantly lower in the LOP than in the NSF.Both MBC and MBN declined significantly with increasing soil depth in the two types of stands.The ratios of MBC to SOC(MBC/SOC)and MBN to TN(MBN/TN)were also significantly lower in the LOP than in the NSF.Moreover,the values of MBC,MBC/SOC,and MBN/TN significantly varied with time and followed a similar pattern during the growing season,all with an apparent peak in summer.Our results indicate that NSF is better in sustaining soil microbial biomass and nutrients than larch plantation in the temperate Northeast China.This calls for cautions in large-scale conversions of the native forests to coniferous plantations as a forest management practice on concerns of sustaining soil productivity.Kai Yang Jiaojun Zhu Min Zhang Qiaoling Yan Osbert Jianxin Sun 2010Journal of Plant Ecology2010,3,3:44
3Cenozoic sedimentary records and geochronological constraints of differential uplift of the Qinghai-Tibet Plateau显示文摘Geological mapping data (1:250000) in the Qinghai-Tibet Plateau and its adjacent regions reveal the sediment sequences, distribution and tectonic evolution of the 92 Tertiary remnant basins. Southern Tibet and the Yecheng area in Xinjiang, located at southern and northwestern margins of the Qinghai-Tibet Plateau, respectively, were parts of the Neo-Tethys remnant sea in the Paleogene. In southern Tibet, both the subabyssal and abyssal sequences occur at the Gyangze, Saga, Guoyala, and Sangmai areas. The deep-water facies successions outcrop in the west, whereas the shallow-water facies sequences in the east, indicating the east to the west retreat of the Neo-Tethys Ocean. The retreat of the Neo-Tethys Ocean in the east was contributed to the earlier tectonic uplift of the eastern Qinghai-Tibet Plateau. The uplift process of the Plateau from the Late Cretaceous to Pliocene is described as follows: During the Late Cretaceous, tectonic uplift of the Qinghai-Tibet Plateau occurred in the northeastern part and the configuration of the Qinghai-Tibet Plateau was characterized by rise in the northeast and depression in the west. In the Paleocene-Eocene interval, the Tengchong-Baingoin and Kuyake-Golmud areas experienced local tectonic uplifting, the West Kunlun uplift zone broadened easterly, the Qilian uplift zone broadened southerly, and the Songpan-Garzê uplift zone shrank easterly. The Oligocene configuration of the Qinghai-Tibet Plateau was characterized by mountain chains rising along its margins and sedimentary basins in the central part because of tectonic uplifts of the Gangdisê and the Himalaya blocks. Meanwhile, the Kunlun-Altyn-Qilian uplift zones have also broadened southerly and northerly. In contrast, the great uplift zones of the Gangdisê, the Himalaya, the Karakorum, and the Kunlun blocks characterize the paleogeographic contours of the Qinghai-Tibet Plateau during the Miocene-Pliocene. Additionally, the thermochronological data on tectonic uplift events in southern Tibet, West Kunlun Mountains, Altyn Tagh, eastern Tibet, and western Sichuan all suggest that the most intense deformation occurred at 13-8 Ma and since 5 Ma, respectively, corresponding to two great uplift periods in Neogene. As a result, turnover of paleogeographic configuration of the Qinghai-Tibet Plateau occurred during the Neogene, experiencing a change from high contours in the east in the pre-Oligocene to high contours in the west at the end-Pliocene. The uplift of the Qinghai-Tibet Plateau during the Cenozoic was episodic, and the uplifts of various blocks within the Plateau were spatially and chronologically different.ZHANG KeXin WANG GuoCan CAO Kai LIU Chao XIANG ShuYuan HONG HanLie KOU XiaoHu XU YaDong CHEN FenNing MENG YanNing CHEN RuiMing 2008Science China Earth Sciences2008,51,11:31
4H6 Non-isolated Full Bridge Grid-connected PV Inverters With Low Leakage Currents显示文摘为满足非隔离光伏并网发电系统对共模漏电流的限制,提出一种六开关逆变器拓朴(H6拓扑)。所提出的H6拓扑在功率传输模态时,进网电流半个工频周期流过3支开关管,而另半个工频周期流过2支开关管,故相对于H5拓扑,降低了通态损耗,有利于热应力均衡,且仍满足续流阶段光伏电池输出端与电网脱离的要求。详细分析拓扑的工作原理,并推论给出H6非隔离光伏并网逆变器的其它3种拓扑结构;比较分析了H5拓扑、Heric拓扑和H6拓扑的损耗和成本。通过1kW通用样机平台对比验证了上述3种拓扑的效率和共模特性。实验结果表明,H6拓扑的变换效率高于H5拓扑、但略低于Heric拓扑,共模特性优于Heric拓扑、但略劣于H5拓扑。ZHANG Li SUN Kai FENG Lanlan XING Yan XU Ming 2012中国电机工程学报2012,32,15:29
5Screening and breeding of high taxol producing fungi by genome shuffling显示文摘To apply the fundamental principles of genome shuffling in breeding of taxol-producing fungi, Nodulisporium sylviform was used as starting strain in this work. The procedures of protoplast fusion and genome shuffling were studied. Three hereditarily stable strains with high taxol production were obtained by four cycles of genome shuffling. The qualitative and quantitative analysis of taxol produced was confirmed using thin-layer chromatography (TLC), high performance liquid chromatography (HPLC) and LC-MS. A high taxol producing fungus, Nodulisporium sylviform F4-26, was obtained, which produced 516.37 μg/L taxol. This value is 64.41% higher than that of the starting strain NCEU-1 and 31.52%―44.72% higher than that of the parent strains.ZHAO Kai, PING WenXiang, ZHANG LiNa, LIU Jun, LIN Yan, JIN Tao & ZHOU DongPo Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin 150080, China 2008Science China(Life Sciences)2008,51,3:25
6Analysis of infections in the first 3-month after living donor liver transplantation显示文摘AIM:To identify factors related to serious postoperative bacterial and fungal infections in the first 3 mo after living donor liver transplantation(LDLT).METHODS:In the present study,the data of 207 patients from 2004 to 2011 were reviewed.The pre-,intra-and post-operative factors were statistically analyzed.All transplantations were approved by the ethics committee of West China Hospital,Sichuan University.Patients with definitely preoperative infections and infections within 48 h after transplantation were excluded from current study.All potential risk factors were analyzed using univariate analyses.Factors significant at a P < 0.10 in the univariate analyses were involved in the multivariate analyses.The diagnostic accuracy of the identified risk factors was evaluated using receiver operating curve.RESULTS:The serious bacterial and fungal infection rates were 14.01% and 4.35% respectively.Enterococcus faecium was the predominant bacterial pathogen,whereas Candida albicans was the most common fungal pathogen.Lung was the most common infection site for both bacterial and fungal infections.Recipient age older than 45 years,preoperative hyponatremia,intensive care unit stay longer than 9 d,postoperative bile leak and severe hyperglycemia were independent risk factors for postoperative bacterial infection.Massive red blood cells transfusion and postoperative bacterial infection may be related to postoperative fungal infection.CONCLUSION:Predictive risk factors for bacterial and fungal infections were indentified in current study.Pre-,intra-and post-operative factors can cause postoperative bacterial and fungal infections after LDLT.Chuan Li Tian-Fu Wen Kai Mi Chuan Wang Lu-Nan Yan Bo Li 2012World Journal of Gastroenterology2012,18,16:26
7An in vivo study with an MRI tracer method reveals the biophysical properties of interstitial fluid in the rat brain显示文摘The nature of brain interstitial fluid (ISF) has long been a subject of controversy. Most of the previous studies on brain ISF were carried out in vitro. In the present study, a novel method was developed to characterize ISF in the living rat brain by magnetic resonance (MR) imaging using gadolinium-diethylenetriaminepentaacetic acid (Gd-DTPA) as a tracer. Sprague Dawley rats (n=8) were subjected to MR scanning before and after the introduction of Gd-DTPA into the caudate nucleus. A one-way drainage of brain ISF was demonstrated on the dynamic MR images. According to the traditional diffusion model, the diffusion and clearance rate constants of the tracer within brain extracellular space (ECS) were derived as (3.38±1.07)×10-4 mm 2 s-1 and (7.60±4.18)×10-5 s-1 . Both diffusion and bulk flow contributed to the drainage of ISF from the caudate nucleus, which demonstrated an ISF-cerebrospinal fluid confluence in the subarachnoid space at the lateral and ventral surface of the brain cortex at 3 h after the injection. By using this newly developed method, the brain ECS and ISF can be quantitatively measured simultaneously in the living brain, which will enhance the understanding of ISF and improve the efficiency of drug therapy via the brain interstitium.HAN HongBin LI Kai YAN JunHao ZHU Kai FU Yu 2012Science China(Life Sciences)2012,55,9:25
8Transcatheter arterial chemoembolization followed by immediate radiofrequency ablation for large solitary hepatocellular carcinomas显示文摘AIM: To assess the technical safety and efficacy of transcatheter arterial chemoembolization (TACE) combined with immediate radiofrequency ablation (RFA) for large hepatocellular carcinomas (HCC) (maximum diameter ≥ 5 cm). METHODS: Individual lesions in 18 patients with HCCs (mean maximum diameter: 7.5 cm; range: 5.1-15.5 cm) were treated by TACE combined with percutaneous RFA between January 2010 and June 2012. All of the patients had previously undergone one to four cycles of TACE treatment. Regular imaging and laboratory tests were performed to evaluate the rate of technical success, technique-related complications, local-regional tumor responses, recurrence-free survival time and survival rate after treatment.RESULTS: Technical success was achieved for all 18 visible HCCs. Complete response (CR) was observed in 17 cases, and partial response was observed in 1 case 1 mo after intervention. The CR rate was 94.4%. Local tumors were mainly characterized by coagulative necrosis. During follow-up (2-29 mo), the mean recurrencefree survival time was 16.8 ± 4.0 mo in 17 cases of CR. The estimated overall survival rate at 6, 12, and 18 mo was 100%. No major complications were observed. Levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) in the blood of 17 patients transiently increased on the third day after treatment (ALT 200.4 ± 63.4 U/L vs 24.7 ± 9.3 U/L, P < 0.05; AST 228.1 ± 25.4 U/L vs 32.7 ± 6.8 U/L, P < 0.05). Severe pain occurred in three patients, which was controlled with morphine and fentanyl. CONCLUSION: TACE combined with immediate RFA is a safe and effective treatment for large solitary HCCs. Severe pain is a major side effect, but can be controlled by morphine.Zhi-Jun Wang Mao-Qiang Wang Feng Duan Peng Song Feng-Yong Liu Zhong-Fei Chang Yan Wang Jie-Yu Yan Kai Li 2013World Journal of Gastroenterology2013,19,26:24
9Curcumin inhibits cellular cholesterol accumulation by regulating SREBP-1/caveolin-1 signaling pathway in vascular smooth muscle cells显示文摘目的: 在 anti-atherosclerosis.Methods 上调查保护的效果和杂种狗枯茗的可能的机制: 从 apoE 大美人拿的动脉粥样硬化患者损害的词法变化(apoE^(-/-))mice 被染色的 hematoxylin 曙红决定。细胞内部的类脂化合物微滴和类脂化合物层次是由油红O染色的 assayed , caveolin-1 的 HPLC.The 蛋白质表示被西方的 blotting.Translocation 和甾醇反应元素绑定 protein-1 ( SREBP-1 )的表示确定被免疫荧光 analysis.Results 间接地检测: 20 mg ·k g~的管理( -1)·d^(-1)curcumin 到apoE^(为 4 个月的 -/-)mice 导致了动脉粥样硬化患者损害的50%减小并且作为与模型组相比在 caveolin-1 表示水平产出5褶层增加。有 50 mg ·L ~的老鼠脉管的平滑肌房间( VSMC ) pretreated (为 48 h 的 -1)ox-lipid 密度脂蛋白( ox-LDL )增加了细胞的类脂化合物内容,并且刺激了 SREBP-1 易位,但是减少 装载level.Lipid 的房间在各种各样的集中暴露了到杂种狗枯茗的 caveolin-1 表示( 12.5,25 ,并且 50 亩摩尔 ·L ^( -1))for 不同持续时间( 0,6,12,24 ,和 48 h )显著地减少了细胞的类脂化合物微滴的数字和区域,全部的胆固醇,胆固醇酉旨,并且伴随 caveolin-1 表示的举起的免费胆固醇铺平(近似3褶层);到原子核的从细胞质的 SREBP-1 的易位与暴露于 N-acetyl-Leu-Leu-norleucinal 的 装载models.Lipid 的 VSMC 相比被禁止,一个 SREBP-1 朊酶禁止者, SREBP-1 的显示出的增加的原子易位,减少的 caveolin-1 表示水平,并且在调整细胞的类脂化合物 levels.Conclusion 上面:姜黄色素通过经由 SREBP-1 的原子易位的抑制增加 caveolin-1 表示在有教养的 VSMC 禁止 ox-LDL-induced 胆固醇累积。Hao-yu YUAN Shuang-yu KUAN Xing ZHENG Hong-yan LING Yun-Bo YANG Peng-Ke YAN Kai LI Duan-Fang LIAO 2008Acta Pharmacologica Sinica2008,29,5:21
10Fibrinogen-like protein 2/fibroleukin prothrombinase contributes to tumor hypercoagulability via IL-2 and IFN-γ显示文摘AIM: To examine the role of Fibrinogen-like protein 2 (fgl2)/fibroleukin in tumor development. Fgl2 has been reported to play a vital role in the pathogenesis in MHV-3 (mouse hepatitis virus) induced fulminant and severe hepatitis,spontaneous abortion,allo-and xeno-graft rejection by mediating 'immune coagulation'. METHODS: Tumor tissues from 133 patients with six types of distinct cancers and the animal tumor tissues from human hepatocellular carcinoma (HCC) model on nude mice (established from high metastasis HCC cell line MHCC97LM6) were obtained. RESULTS: Hfgl2 was detected in tumor tissues from 127 out of 133 patients as well as tumor tissues collected from human HCC nude mice. Hfgl2 was highly expressed both in cancer cells and interstitial inflammatory cells including macrophages,NK cells,and CD8+ T lymphocytes and vascular endothelial cells. Hfgl2 mRNA was localized in cells that expressed hfgl2 protein. Fibrin (nogen) co-localization with hfgl2 expression was determined by dual immunohistochemical staining. In vitro,IL-2 and IFN-γ increased hfgl2 mRNA by 10-100 folds and protein expression in both THP-1 and HUVEC cell lines. One-stage clotting assays demonstrated that THP-1 and HUVEC cells expressing hfgl2 had increased procoagulant activity following cytokines stimulation. CONCLUSION: The hfg12 contributes to the hypercoagulability in cancer and may induce tumor angiogenesis and metastasis via cytokine induction.Kai Su Fang Chen Wei-Ming Yan Qi-Li Zeng Li Xu Dong Xi Bin Pi Xiao-Ping Luo Qin Ning 2008World Journal of Gastroenterology2008,14,39:20
11Long-chain acyl-CoA synthetase in fatty acid metabolism involved in liver and other diseases:An update显示文摘Long-chain acyl-Co A synthetase(ACSL) family members include five different ACSL isoforms, each encoded by a separate gene and have multiple spliced variants. ACSLs on endoplasmic reticulum and mitochondrial outer membrance catalyze fatty acids with chain lengths from 12 to 20 carbon atoms to form acyl-Co As, which are lipid metabolic intermediates and involved in fatty acid metabolism, membrane modifications and various physiological processes. Gain- or lossof-function studies have shown that the expression of individual ACSL isoforms can alter the distribution and amount of intracellular fatty acids. Changes in the types and amounts of fatty acids, in turn, can alter the expression of intracellular ACSLs. ACSL family members affect not only the proliferation of normal cells, but the proliferation of malignant tumor cells. They also regulate cell apoptosis through different signaling pathways and molecular mechanisms. ACSL members have individual functions in fatty acid metabolism in different types of cells depending on substrate preferences, subcellular location and tissue specificity, thus contributing to liver diseases and metabolic diseases, such as fatty liver disease, obesity, atherosclerosis and diabetes. They are also linked to neurological disorders and other diseases. However, the mechanisms are unclear. This review addresses new findings in the classification and properties of ACSLs and the fatty acid metabolismassociated effects of ACSLs in diseases.Sheng Yan Xue-Feng Yang Hao-Lei Liu Nian Fu Yan Ouyang Kai Qing 2015World Journal of Gastroenterology2015,21,12:18
12Effect of notoginsenoside R1 on hepatic microcirculation disturbance induced by gut ischemia and reperfusion显示文摘AIM: To assess the effect of notoginsenoside R1 on hepatic microcirculatory disturbance induced by gut ischemia/reperfusion (I/R) in mice.METHODS: The superior mesenteric artery (SMA) of C57/BL mice was ligated for 15 min to induce gut ischemia followed by 30-min reperfusion. In another set of experiments, R1 was continuously infused (10 mg/kg per hour) from 10 min before I/R until the end of the investigation to study the influence of R1 on hepatic microcirculatory disturbance induced by gut I/R. Hepatic microcirculation was observed by inverted microscopy, and the vascular diameter, red blood cell (RBC) velocity and sinusoid perfusion were estimated. Leukocyte rolling and adhesion were observed under a laser confocal microscope. Thirty and 60 min after reperfusion, lactate dehydrogenase (LDH), alanine aminotransferase (ALT) and aspartate transaminase (AST) in peripheral blood were determined. The expression of adhesion molecules CD11b/CD18 in neutrophils and tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6) and monocyte chemotactic protein-1 (MCP-1) in plasma were evaluated by flow cytometry. E-selectin and intercellular adhesion molecule-1 (ICAM-1) in hepatic tissue were examined by immunofluorescence. RESULTS: After gut I/R, the diameters of terminal portal venules and central veins, RBC velocity and the number of perfused sinusoids were decreased, while the leukocyte rolling and adhesion, the expression of E-selectin in hepatic vessels and CD18 in neutrophils, IL-6, MCP-1, LDH, ALT and AST were increased. R1 treatment attenuated these alterations except for IL-6 and MCP-1.CONCLUSION: R1 prevents I/R-induced hepatic microcirculation disturbance and hepatocyte injury. The effect of R1 is related to its inhibition of leukocyte rolling and adhesion by inhibiting the expression of E-selectin in endothelium and CD18 in neutrophils.Wei-Xing Chen Fang Wang, Yu-Ying Liu, Qing-Jiang Zeng, Kai Sun, Xin Xue, Xiang Li, Ji-Ying Yang, Li-Hua An,Bai-He Hu, Jin-Hui Yang, Chuan-She Wang, Zhi-Xin Li, Lian-Yi Liu, Yan Li, Jun Zheng, Fu-Long Liao, Dong Han,Jing-Yu Fan, Jing-Yan Han Fang Wang Yu-Ying Liu Qing-Jiang Zeng Kai Sun Xin Xue Xiang Li Ji-Ying Yang Li-Hua An Bai-He Hu Jin-Hui Yang Chuan-She Wang Zhi-Xin Li Lian-Yi Liu Yan Li Jun Zheng Fu-Long Liao Dong Han Jing-Yu Fan Jing-Yan Han 2008World Journal of Gastroenterology2008,14,1:17
13Human monoclonal antibodies block the binding of SARS-CoV-2 spike protein to angiotensin converting enzyme 2 receptor显示文摘According to the World Health Organization(WHO)newly updated situation report on March 18th,2020,the coronavirus disease 2019(COVID-19)pandemic has confirmed 191,127 cases and claimed 7807 deaths worldwide.1 The etiological agent of COVID-19 has been identified as a novel coronavirus,the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),belonging to Sarbecovirus subgenus(genus Betacoronavirus,family Coronaviridae)and showing 79.6 and 96.2%sequence identity in nucleotide to SARS-CoV and a bat coronavirus(BatCoV RaTG13),respectively.2–4 Like SARS-CoV infection,a substantial fraction of COVID-19 patients exhibits severe respiratory symptoms and has to be hospitalized in intensive care unit.5–8 Although the mortality rate of COVID-19 is significantly lower than that of SARS-CoV infection,SARS-CoV-2 shows much higher human-to-human transmission rate,rapidly leading to a global pandemic declared by WHO on March 11th,2020.Xiangyu Chen Ren Li Zhiwei Pan Chunfang Qian Yang Yang Renrong You Jing Zhao Pinghuang Liu Leiqiong Gao Zhirong Li Qizhao Huang Lifan Xu Jianfang Tang Qin Tian Wei Yao Li Hu Xiaofeng Yan Xinyuan Zhou Yuzhang Wu Kai Deng Zheng Zhang Zhaohui Qian Yaokai Chen Lilin Ye 2020Cellular & Molecular Immunology2020,17,6:17
14Piperine suppresses tumor growth and metastasis in vitro and in vivo in a 4T1 murine breast cancer model显示文摘目的: 调查胡椒碱,在 Piper nigrum 在场的主要的刺鼻的碱和 Piper longum 的效果,在肿瘤生长和老鼠 4T1 的转移上在 vitro 并且在 vivo 的乳房的癌,并且阐明内在的机制。Li-hua LAI Qi-hong FU Yang LIU Kai JIANG Qing-ming GUO Qing-yun CHEN Bin YAN Qing-qing WANG Jian-gen SHEN 2012Acta Pharmacologica Sinica2012,33,4:16
15Adipose-derived mesenchymal stem cell transplantation promotes adult neurogenesis in the brains of Alzheimer's disease mice显示文摘In the present study,we transplanted adipose-derived mesenchymal stem cells into the hippocampi of APP/PS1 transgenic Alzheimer’s disease model mice.Immunofluorescence staining revealed that the number of newly generated(BrdU+)cells in the subgranular zone of the dentate gyrus in the hippocampus was significantly higher in Alzheimer’s disease mice after adipose-derived mesenchymal stem cell transplantation,and there was also a significant increase in the number of BrdU+/DCX+neuroblasts in these animals.Adipose-derived mesenchymal stem cell transplantation enhanced neurogenic activity in the subventricular zone as well.Furthermore,adipose-derived mesenchymal stem cell transplantation reduced oxidative stress and alleviated cognitive impairment in the mice.Based on these findings,we propose that adipose-derived mesenchymal stem cell transplantation enhances endogenous neurogenesis in both the subgranular and subventricular zones in APP/PS1 transgenic Alzheimer’s disease mice,thereby facilitating functional recovery.Yufang Yan Tuo Ma Kai Gong Qiang Ao Xiufang Zhang Yao Gong 2014Neural Regeneration Research2014,9,8:16
16Effect of Tong Xie Yao Fang on endogenous metabolites in urine of irritable bowel syndrome model rats显示文摘BACKGROUND Tong Xie Yao Fang is a representative traditional Chinese prescription for the treatment of liver and spleen deficiency,abdominal pain and diarrhea.It has a unique function in the treatment of gastrointestinal dysfunction including irritable bowel syndrome(IBS),is a common functional bowel disease.Its main symptoms are recurrent abdominal pain,diarrhea,constipation or alternations between diarrhea and constipation.There are obvious differences in metabolites between TCM syndromes.By comparing the body fluid metabolism maps of model animals,metabolomics can discover disease biomarkers,analyze the differences in metabolic pathways and understand the pathological process and the metabolic pathways of substances in the body.Thus,the evaluation of animal models tends to be comprehensive and objective.This may provide further understanding between the interaction between Tong Xie Yao Fang and the IBS model.AIM To evaluate the effect of Tong Xie Yao Fang on IBS rats by using metabolomics method.METHODS Wistar rats were used to establish IBS models,and then randomly divided into four groups:A model control group and three Tong Xie Yao Fang treatment groups(high,medium and low doses).A normal,non-IBS group was established.The rats were treated for 2 wk.On days 0 and 14 of the experimental model,urine was collected for 12 h and was analyzed by ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry.Nine potential biomarkers were identified,and six major metabolic pathways were found to be related to IBS.RESULTS In the study of metabonomics,nine potential biomarkers including L-serine,4-methylgallic acid,L-threonine,succinylacetone,prolyl-hydroxyproline,valylserine,acetyl citrate,marmesin rutinoside and 5-hydroxy-L-tryptophan were identified in urine,which were assigned to amino acids,organic acids,succinyl and glycosides.Furthermore,the metabolic pathway of L-serine,L-threonine and 5-hydroxy-L-tryptophan was found in the Kyoto Encyclopedia of Genes and Genomes,which mainly involved the metabolism of cysteine and methionine,vitamin B6 metabolism,serotonin synapse,tryptophan metabolism,sphingolipid metabolism,digestion,absorption of protein and amino acid metabolism.These pathways are related to intestinal dysfunction,inflammatory syndrome,nervous system dysfunction and other diseases.CONCLUSION Tong Xie Yao Fang has pharmacological effects on IBS,and its mechanism may be related to the metabolism of the nine potential biomarkers identified above in urine.Xue-Ying Zhao Jian-Wei Wang Yue Yin Kai Li Miao Zhang Fu-Ping Yan 2019World Journal of Gastroenterology2019,25,34:14
17Expression of transcription factor Pokemon in non-small cell lung cancer and its clinical significance显示文摘背景:抄写因素 Pokemon,重要肿瘤的中央规定基因压制或 ARF 基因,由行动施加了它的活动许多压制肿瘤的基因和 proto-oncogenes 在上游。它在非小的房间肺癌症(NSCLC ) 和它的临床的意义的表示仍然保持不清楚。这研究的目的是在 NSCLC 调查 Pokemon 的表示并且与病人的预后上的临床的病理学的特征和它的影响探索它的关联。方法:NSCLC 的 55 个案例涉及这研究。在肿瘤织物的 Pokemon 的表示,相应肿瘤邻近的织物和包围织物经由反向的抄写聚合酶链反应(RT-PCR ) 并且西方的弄污被检测,与在 NSCLC 和它的临床的病理学的特征的肿瘤织物调查在 Pokemon 的表示之间的关联的目的。而且,预示的分析被执行在免疫之上基于组织化学(IHC ) 在档案的肿瘤标本的 Pokemon 基因的表示的察觉(5 年以前) NSCLC 的 62 个案例。结果:Pokemon mRNA 和蛋白质的表示的统计意义在肿瘤织物被决定,肿瘤邻近的织物和包围织物(P<0.05 ) 。Pokemon 的表示被决定不与病人节点转移调节的性别,年龄,吸烟条件,肿瘤区别度,组织学和淋巴被联系。然而,它与 TNM 阶段的关系被建立(P<0.05 ) 。而且,比因此,那些,与积极 Pokemon 表示(P=0.004 ) , Pokemon 的表示被相信是影响预后(P=0.034 ) 的一个独立因素,有否定 Pokemon 表示的病人的幸存率才显著地高。结论:Pokemon 在 NSCLC 组织是过去表示的, Pokemon 的表示可能具有在非小的房间肺癌症 prognostic 评估的临床的意义。ZHAO Zhi-hong WANG Sheng-fa YU Liang WANG Ju CHANG Hao YAN Wei-li FU Kai ZHANG Jian 2008Chinese Medical Journal2008,,5:13
18Response of Pinus koraiensis seedling growth to different light conditions based on the assessment of photosynthesis in current and one-year-old needles显示文摘As one of the three major five-leaved pines in the northern hemisphere,Pinus koraiensis is the most important dominant tree species in the natural mixed-broadleaved Korean pine forests.However,the regeneration of P.koraiensis under the canopy of secondary forest stands is poor because of the light limitation.This study was conducted to understand how P.koraiensis seedlings adapt to different light intensities and what would be the optimum light level for their establishment and growth.Three repetition plots with four light intensities(15%,30%,60%and 100%of the natural incident irradiances,achieved by suspending layers of black nylon net above and surrounding the plots)were set up under natural climate conditions in a montane region in eastern Liaoning Province,Northeast China.A total of 80 P.koraiensis seedlings with similar height and root collar diameter were transplanted into four plots.After one year of acclimation to the specific light conditions,the seasonal variations of the photosynthetic variables and needle traits of the current and one-year-old needles,and the growth parameters were observed under four light intensities.The results indicated that:(1)The seedling at60%treatment exhibited the greatest growth,which agreed with the response of the light-saturated photosynthetic rates(Amax)and the dark respiration rate(Rd)in the current and one-year-old needles,i.e.,Rd at60%treatment was significantly lower than that at 100%treatment,but Amax did not differ between the seedlings at 100%and 60%treatments.(2)The P.koraiensis seedlings have a certain photosynthetic plasticity to adapt the light conditions by adjusting their needle traits and regulating the physiological processes,because Amax,Rd,light saturation point and compensation point,the needle mass area,needle nitrogen and chlorophyll contents were significantly(p<0.05)correlated with the light intensities.Especially,Amax at 100%and 60%treatments was significantly higher(p<0.05)than that at 30%and 15%treatments for both current and one-year-old needles.(3)The needles of different ages played a commutative role during the growing season,i.e.,the one-year-old needles played a major role for the photosynthesis in the early growing season;the current year needles did in the later growing season.This ensured the effective photosynthesis throughout the growing season.These findings suggest that P.koraiensis is the in-between heliophilous and shade-tolerant tree species at least for the seedlings up to 8 years.Jiaojun Zhu Kai Wang Yirong Sun Qiaoling Yan 2014Journal of Forestry Research2014,25,1:13
19Vagus Nerve Stimulation for Pediatric and Adult Patients with Pharmaco-resistant Epilepsy显示文摘Fan-Gang Meng Fu-Min Jia Xiao-Hui Ren Yan Ge Kai-Liang Wang Yan-Shan Ma Ming Ge Kai Zhang Wen-Han HU Xin Zhang Wei Hu Jian-Guo Zhang 2015Chinese Medical Journal2015,,19:13
20Immunohistochemical study of hepatic oval cells in human chronic viral hepatitis显示文摘AIM To detect immunohistochemically the presence of oval cells in chronic viral hepatitis with antibody against c-kit.METHODS We detected oval cells in paraffin-embedded liver sections of 3 normal controls and 26 liver samples from patients with chronic viral hepatitis, using immunohistochemistry with antibodies against c-kit, π-class glutathione Stransferase ( Tr-GST ) and cytokeratins 19(CK19).RESULTS Oval cells were not observed in normal livers. In chronic viral hepatitis, hepatic oval cells were located predominantly in the periportal . region and fibrosis septa,characterized by an ovoid nucleus, small size,and scant cytoplasm. Antibody against stem cell factor receptor, c-kit, had higher sensitivity and specificity than π-GST and CK19. About 50% -70% of c-kit positive oval cells were stained positively for either π-GST or CK19.CONCLUSION Oval cells are frequently detected in human livers with chronic viral hepatitis, suggesting that oval cell proliferation is associated with the liver regeneration in this condition.Xiong Ma De Kai Qiu Yan Shen Peng Shanghai Institute of Digestive Diseases, Renji Hospital, Shanghai Second Medical University, Shanghai 200001, China 2001World Journal of Gastroenterology2001,7,2:13
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