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384篇 您的检索式:作者名="Tan Ming"
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1Mathematical Modeling and Effect of Various Hot-Air Drying on Mushroom(Lentinus edodes)显示文摘An experimental study was performed to determine the characteristics and drying process of mushroom(Lentinus edodes) by 6 different hot-air drying methods namely isothermal drying,uniform raise drying,non-uniform raise drying,uniform intermittent drying,non-uniform intermittent drying and combined drying.The chemical composition(dry matter,ash,crude protein,crude fat,total sugars,dietary fiber,and energy),color parameters(L,a*,b*,c*,and h0) and rehydration capacities were determined.Among all the experiments,non-uniform intermittent drying reached a better comprehensive results due to the higher chemical composition,better color quality associated with high bright(26.381±5.842),high color tone(73.670±2.975),low chroma(13.349±3.456) as well as the highest rehydration(453.76% weigh of dried body).Nine kinds of classical mathematical model were used to obtained moisture data and the Midili-kucuk model can be described by the drying process with the coefficient(R2 ranged from 0.99790 to 0.99967),chi-square(χ2 ranged from 0.00003 to 0.00019) and root mean square error(RMSE ranged from 0.000486 to 0.0012367).GUO Xiao-hui XIA Chun-yan TAN Yu-rong CHEN Long MING Jian 2014Journal of Integrative Agriculture2014,13,1:22
2Chronology and geochemistry of the volcanic rocks in Woruo Mountain region,Northern Qiangtang depression:Implications to the Late Triassic volcanic-sedimentary events显示文摘A suite of sedimentary-volcaniclastic rocks intercalated with the volcanic rocks unconformably overlies the Triassic Xiaochaka Formation in the Woruo Mountain region, Qiangtang Basin, northern Tibet. The vitric tuff from the base of these strata gives a SHRIMP zircon U-Pb age of 216 ± 4.5 Ma, which represents the age of the Late Triassic volcanic-sedimentary events in the Woruo Mountain region, and is consistent with that of the formation of the volcanic rocks from the Nadi Kangri Formation in the Nadigangri-Shishui River zone. There is a striking similarity in geochemical signatures of the volcanic rocks from the Woruo Mountain region and its adjacent Nadigangri-Shishui River zone, indicating that all the volcanic rocks from the Qiangtang region might have the same magmatic source and similar tectonic setting during the Late Triassic. The proper recognition of the Late Triassic large-scale volcanic eruption and volcanic-sedimentary events has important implications for the interpretation of the Late Triassic biotic extinction, climatic changes and regressive events in the eastern Tethyan domain, as well as the understanding of the initiation and nature, and sedimentary features of the Qiangtang Basin during the Late Triassic-Jurassic.WANG Jian FU XiuGen CHEN WenXi WANG ZhengJiang TAN FuWen CHEN Ming ZHUO JieWen 2008Science China Earth Sciences2008,51,2:21
3Circulation background of climate patterns in the past millennium: Uncertainty analysis and re-reconstruction of ENSO-like state显示文摘The question of whether or not global warming has paused since more than ten years ago, namely 'warming hiatus', has attracted the attention of climate science community including the IPCC. Some authors have attributed the 'warming hiatus' to the internal changes in the climate system, i.e., the recombination of ocean-atmosphere circulations. Therefore, it is necessary to propose higher requirements on reconstructing circulation background of climate change for the past millennium. However, the analyses of changes in atmospheric circulation over the last millennium as well as the conclusions of related regional climate patterns are so widely different and contradictory, bringing uncertainties to our understanding of regional even global climate change to a great extent. On the other hand, in the last 10 years the high-precision U/Th-dated stalagmite oxygen isotope ratio(δ^(18)O) sequences provided an accurate chronological frame for the paleoclimate study of the middle and late Pleistocene, in which all authors from China took the Chinese stalagmite δ^(18)O as the summer monsoon index without exception. However, this point of view misleads the climate scientists into thinking that the stalagmite δ^(18)O can be as the proxy of precipitation amount. Nevertheless, it is well known that all of these records have a lot in common in the low frequency trend. However, most sequences cannot be calibrated by instrumental precipitation records, and thus the uncertainty of the climate research framework of China and even of the world has increased. Therefore, it is imperative for climatology to clarify the origin of contradiction and to reduce the uncertainty as early as possible. On the basis of analyzing the significance of stalagmite δ^(18)O in the monsoon regions of China, the author tries to propose a new circulation proxy in this paper: integrating the Chinese stalagmite oxygen isotope sequence to reconstruct the tropical Pacific sea surface temperature gradient, i.e., the large-scale ENSO-like state over the past millennium. Furthermore, the author speculates that it was warm in the modern times and the Medieval Period, but the circulation recombination was different in both periods. And this inference could be supported by the longer record since Last Glacial Maximum. In other words, the attribution analysis of the identical low-frequency trends of Chinese stalagmite δ^(18)O on a large scale shows that the ENSO-like state controls the climate change in the monsoon regions of China at different time scales(from interannual to century or even longer time scales). Wherein the important connection of circulations is the western Pacific subtropical high(WPSH), that is to say, besides the interannual and decadal time scales, the WPSH would possess the circulation mode on longer timescales. For example, we may discuss the change of the WPSH in the whole Holocene epoch, i.e., the half precession period. These discussions could make sense to the study of not only the paleoclimate but also the modern climate.TAN Ming 2016Science China Earth Sciences2016,59,6:16
4Bioptical microcycles of laminated speleothems from China and their chronological significance显示文摘Interfaces of microlayers, in most stalagmites from China, consist of opaque and organic materials. Observed with microscope, the interfaces seem dark under transmitted light and luminiferous under reflected fluorescent light. Stalagmites in which the two optical characters are unified spatially would be most suitable for cross-dating use, and can play an important role in the study on speleochronology and speleoclimatology.Ming Tan Xiaoguang Qin Linmei Shen Xianfeng Wang Yongjin Wang Tieying Li Linhua Song Laihong Wang Dongsheng Liu 1999Chinese Science Bulletin1999,44,17:14
5Response of global lightning activity to air temperature variation显示文摘It is an issue of great attention but yet not very clear whether lightning activities increase or decrease on a warmer world. Reeve et al. presented that lightning activities in global land and the Northern Hemisphere land have posi- tive response to the increase of wet bulb temperature at 1000hPa. Is this positive response restricted only to wet bulb temperature or in land? What is the response of global light- ning activities (in both land and ocean) to the global surface air temperature variation like? This paper, based on the 5-year or 8-year OTD/LIS satellite-based lightning detecting data and the NCEP reanalysis data, makes a reanalysis of the response of the global and regional lightning activities to temperature variations. The results show that on the inter- annual time scale the global total flash rate has positive re- sponse to the variation in global surface air temperature, with the sensitivity of 17±7% K?1. Also, the seasonal mean flash rate of continents all over the world and that of conti- nents in the Northern Hemisphere have sensitive positive response to increase of global surface air temperature and wet bulb temperature, with the sensitivity of about 13±5% K?1, a bit lower than estimation of 40% K?1 in Reeve et al. However, the Southern Hemisphere and other areas like the tropics show no significant correlation.MA Ming TAO Shanchang ZHU Baoyou LUE Weitao TAN Yongbo 2005Chinese Science Bulletin2005,50,22:13
6Inhibitory effect of blue honeysuckle extract on high-fat-diet-induced fatty liver in mice显示文摘Blue honeysuckle is rich in polyphenols, and recently receiving attention because of its potential antioxidant and anti-inflammatory properties. Nonalcoholic fatty liver disease(NAFLD) is the leading cause of chronic liver disease that develops hepatic inflammation and metabolic syndrome. The present study aims to study the effect of blue honeysuckle extract(BHE) on fat deposition and hepatic lipid peroxidation in a high-fat-diet(HFD)-induced mouse model. Mice were fed a normal diet(ND) or a HFD containing 0.5% or 1% of BHE or not for 45 d. Liver sections were stained by hematoxylin-eosin staining.Serum lipids were measured by a clinical analyzer. Insulin was examined by ELISA, and hepatic proteins were detected by Western blotting. Dietary supplementation of BHE dose-dependently suppressed HFD-induced obesity and hepatic fat deposition. Moreover, BHE improved glucose metabolism by increasing insulin sensitivity and attenuated oxidative stress potentially by up-regulating nuclear factor(erythroid-derived 2)-like 2(Nrf2)-mediated pathway.Ming Liu Jijun Tan Ziyu He Xi He De-Xing Hou Jianhua He Shusong Wu 2018Animal Nutrition2018,,3:13
7Protective Effect of Hydroxysafflor Yellow A on Inflammatory Injury in Chronic Obstructive Pulmonary Disease Rats显示文摘Objective: To investigate the attenuating effect of Hydroxysafflor yellow A(HSYA) on inflammatory injury in chronic obstructive pulmonary disease(COPD). Methods: Rats were randomly assigned to 7 groups according to body weight including normal control group, HSYA blank group(76.8 mg/kg), COPD group, COPD+HSYA(30, 48, 76.8 mg/kg) groups and COPD+dexamethasone(2 mg/kg), 10 in each group. Passive cigarette smoke and intratracheal instil ation of lipopolysaccharides were used to establish a COPD model in rats. Hematoxylin and eosin staining of lung tissue sections was used, real-time polymerase chain reaction(PCR) was used to assay m RNA levels of some cytokines in lung tissues, the cytokines in bronchoalveolar lavage fluid(BALF) were measured by enzyme-linked immunosorbent assay(ELISA), Western blot analysis was used to determine phosphorylated p38 mitogen-activated protein kinase(MAPK) levels in lung tissues, and nuclear factor-κB(NF-κB) p65 protein levels in lung tissues were detected by immunohistochemistry. Results: Lung alveolar septa destruction, alveolus fusion, inflammatory cel infiltration, and bronchiole exudation were observed. These pathological changes were al eviated in the COPD+HSYA group. The m RNA expression of inflammatory factors were significantly increased in lung tissues from COPD rats(all P<0.01) and were inhibited by HSYA. Levels of inflammatory cytokines in BALF of COPD rats were significantly increased(all P<0.01) which were inhibited by HSYA(all P<0.01, 48, 76.8 mg/kg). The levels of p38 MAPK phosphorylation and p65 in lung tissues of COPD rats were significantly increased(al P<0.01) and were suppressed by HSYA(all P<0.01, 48, 76.8 mg/kg). Conclusions: HSYA could alleviate inflammatory cell infiltration and other pathological changes in the lungs of COPD rats. HSYA could inhibit inflammatory cytokine expression, and increase phosphorylation of p38 MAPK and NF-κB p65 in the lungs of COPD rats. The protective mechanism of HSYA to inhibit COPD inflammation might be by attenuating NF-κB and p38 MAPK signal transduction.JIN Ming XUE Chang-jiang WANG Yu DONG Fang PENG Yuan-yuan ZHANG Ya-dan ZANG Bao-xia TAN Li 2019Chinese Journal of Integrative Medicine2019,25,10:12
8Dietary protocatechuic acid ameliorates inflammation and up-regulates intestinal tight junction proteins by modulating gut microbiota in LPS-challenged piglets显示文摘Background: Weaning is one of the major factors that cause stress and intestinal disease in piglets. Protocatechuic acid(PCA) is an active plant phenolic acid which exists in Chinese herb, Duzhong(Eucommia ulmoides Oliver), and is also considered as the main bioactive metabolite of polyphenol against oxidative stress and inflammation. This study aimed to investigate the effect of PCA on growth performance, intestinal barrier function, and gut microbiota in a weaned piglet model challenged with lipopolysaccharide(LPS).Methods: Thirty-six piglets(Pig Improvement Company line 337 × C48, 28 d of age, 8.87 kg ± 0.11 kg BW) were randomly allocated into 3 treatments and fed with a basal diet(CTL), a diet added 50 mg/kg of aureomycin(AUR), or a diet supplemented with 4000 mg/kg of PCA, respectively. The piglets were challenged with LPS(10 μg/kg BW) on d 14 and d 21 by intraperitoneal injection during the 21-d experiment. Animals(n = 6 from each group) were sacrificed after being anesthetized by sodium pentobarbital at 2 h after the last injection of LPS. The serum was collected for antioxidant indices and inflammatory cytokines analysis, the ileum was harvested for detecting mRNA and protein levels of tight junction proteins by PCR and immunohistochemical staining, and the cecum chyme was collected for intestinal flora analysis using 16 S rRNA gene sequencing.Results: Dietary supplementation of PCA or AUR significantly increased the expression of tight junction proteins including ZO-1 and claudin-1 in intestinal mucosa, and decreased the serum levels of thiobarbituric acid reactive substances(TBARS) and IL-6, as compared with CTL group. In addition, PCA also decreased the serum levels of IL-2 and TNF-α(P < 0.05). Analysis of gut microbiota indicated that PCA increased the Firmicutes/Bacteroidetes ratio(P < 0.05). Spearman's correlation analysis at the genus level revealed that PCA reduced the relative abundance of Prevotella 9, Prevotella 2, Holdemanella, and Ruminococcus torques group(P < 0.05), and increased the relative abundance of Roseburia and Desulfovibrio(P < 0.05), whereas AUR had no significant effect on these bacteria.Conclusions: These results demonstrated that both PCA and AUR had protective effect on oxidative stress, inflammation and intestinal barrier function in piglets challenged with LPS, and PCA potentially exerted the protective function by modulating intestinal flora in a way different from AUR.Ruizhi Hu Ziyu He Ming Liu Jijun Tan Hongfu Zhang De-Xing Hou Jianhua He Shusong Wu 2021Journal of Animal Science and Biotechnology2021,12,1:12
9Protective Effect of Hydroxysafflor Yellow A on Bleomycin-Induced Pulmonary Inflammation and Fibrosis in Rats显示文摘Objective: To observe the effect of hydroxysafflor yellow A(HSYA), an active ingredient of a traditional Chinese herbal medicine Carthamus tinctorius L., on lung inflammation and pulmonary fibrosis induced by bleomycin(BLM) in rats. Methods: Animals were divided into 6 groups including normal group, model group, three HSYA groups and dexamethasone(DXM) group. Three doses of HSYA(35.6, 53.3, and 80.0 mg·kg^(–1)·day^(–1)) were intraperitoneally(i.p.) injected in rats for 3 weeks after BLM administration and DXM was used as the positive control(n=8 or 12). Arterial blood gas was assayed and morphological changes were observed. Lung mRNA expressions of tumor necrosis factor(TNF)-α, interleukin(IL)-1β, IL-6 and some cytokines in lung tissue were detected by real-time polymerase chain reaction. Nuclear factor-κB p65 or α-smooth muscle actin(α-SMA) protein distribution in rat lung tissue was observed by immunohistochemistry. Results: On the 7 th day after BLM administration, lung tissue showed serious inflammation. Treatment with HSYA or DXM ameliorated lung inflammation. After treatment with HSYA or DXM, oxygen partial pressure(PaO_2) increased(HSYA 80.0 mg·kg^(–1), P<0.01) and CO_2 partial pressure(PaCO_2) decreased(HSYA 53.3, 80.0 mg·kg^(–1), P<0.05). Moreover, the mRNA expression of TNF-α, IL-1β, and IL-6; and the number of NF-κB p65 positive cells was lower in HSYA 53.3 and 80.0 mg·kg^(–1) groups than those in the model group(all P<0.05). Twenty-one days after BLM administration, HSYA or DXM treatment ameliorated fibrosis, increased PaO_2(HSYA 53.3, 80.0 mg·kg^(–1), P<0.01), and decreased PaCO_2(53.3 and 80.0 mg·kg^(–1), P<0.05). Further, the mRNA expression of TGF-β1, α-SMA, and collagen Ⅰ as well as the number of α-SMA positive cells increased in the model group and HSYA can attenuate these changes(53.3, 80.0 mg·kg^(–1), P<0.05). Hematoxylin and eosin and Masson's trichrome staining indicated that the fibrosis and collagen deposition were ameliorated in HSYA groups(53.3, 80.0 mg·kg^(–1), P<0.05). Conclusion: HSYA could alleviate acute lung inflammation and chronic pulmonary fibrosis induced by BLM in rats.JIN Ming WANG Lin WU Yan ZANG Bao-xia TAN Li 2018Chinese Journal of Integrative Medicine2018,24,1:12
10Pelvic Exenteration for Recurrent and Persistent Cervical Cancer显示文摘Lei Li Shui-Qing Ma Xian-Jie Tan Sen Zhong Ming Wu 2018Chinese Medical Journal2018,,13:12
11Prognostic biomarkers for prediction of recurrence of hepatocellular carcinoma:Current status and future prospects显示文摘Hepatocellular carcinoma(HCC)is one of the leading causes of cancer death worldwide,with region specific etiologies.Despite improvements made in the diagnosis of HCC,the prognosis of HCC patients remains poor due to the high recurrence rate of HCC.There is an urgent need for development of prognostic biomarkers to predict the risk of recurrence in HCC patients after'curative'treatment.Such stratification may aid in patient management and development of personalized medicine for HCC treatment.Omics based studies facilitate the study of global changes in biomolecules in a disease in a high throughput manner,and hence are well poised to understand the complex changes which led to HCC recurrence.The quantitative nature of data obtained from omics based studies allow for development of prognostic biomarkers based on changes in gene,protein and metabolite expression.In this review,we surveyed the ap-plication of transcriptomics,proteomics and metabolomics in the study of HCC recurrence.We summarised the data in the literature from these three fields of studies that claimed to be prognostic for HCC recurrence.We critiqued on the limitations of each area of research and the challenges faced in translating the research results for clinical application in predicting HCC recurrence.Seow Chong Lee Hwee Tong Tan Maxey Ching Ming Chung 2014World Journal of Gastroenterology2014,20,12:11
12Total hip arthroplasty for surgical management of advanced tuberculous hip arthritis:Case report显示文摘Tuberculosis(TB) arthritis of the hip is a debilitating disease that often results in severe cartilage destruction and degeneration of the hip. In advanced cases,arthrodesis of the hip confers benefits to the young,high-demand and active patient. However, many of these patients go on to develop degenerative arthritis of the spine, ipsilateral knee and contralateral hip,necessitating the need for a conversion to total hip arthroplasty. Conversion of a previously fused hip to atotal hip arthroplasty presents as a surgical challenge due to altered anatomy, muscle atrophy, previous surgery and implants, neighbouring joint arthritis and limb length discrepancy. We report a case of advanced TB arthritis of the hip joint in a middle-aged Singaporean Chinese gentleman with a significant past medical history of miliary tuberculosis and previous hip arthrodesis. Considerations in pre-operative planning, surgical approaches and potential pitfalls are discussed and the operative technique utilized and post-operative rehabilitative regime of this patient is described. This case highlights the necessity of pre-operative planning and the operative technique used in the conversion of a previous hip arthrodesis to a total hip arthroplasty in a case of TB hip arthritis.Shi Ming Tan Pak Lin Chin 2015World Journal of Orthopedics2015,6,2:10
13PandaX: a liquid xenon dark matter experiment at CJPL显示文摘PandaX is a large liquid-xenon detector experiment usable for direct dark-matter detection and 136Xe double-beta decay search.The central vessel was designed to accommodate a staged target volume increase from initially 120 kg(stage I)to 0.5 t(stage II)and eventually to a multi-ton scale.The experiment is located in the Jinping Deep-Underground Laboratory in Sichuan,China.The detector operates in dual-phase mode,allowing detection of both prompt scintillation,and ionization charge through proportional scintillation.In this paper a detailed description of the stage I detector design and performance as well as results established during the commissioning phase are presented.CAO XiGuang CHEN Xun CHEN YunHua CUI XiangYi FANG DeQing FU ChangBo GIBONI Karl L. GONG HaoWei GUO GuoDong HE Ming HU Jie HUANG XingTao JI XiangDong JU YongLin LI ShaoLi LIN Qing LIU HuaXuan LIU JiangLai LIU Xiang LORENZON Wolfgang MA YuGang MAO YaJun NI KaiXuan PUSHKIN Kirill REN XiangXiang SCHUBNELL Michael SHEN ManBing SHI YuJie STEPHENSON Scott TAN AnDi TARLé Greg WANG HongWei WANG JiMing WANG Meng WANG XuMing WANG Zhou WEI YueHuan WU ShiYong XIAO MengJiao XIAO Xiang XIE PengWei YE Tao YOU YingHui ZEN XiongHui ZHANG Hua ZHANG Tao ZHAO HaiYing ZHAO Li ZHOU XiaoPeng ZHU ZhongHua 2014Science China(Physics,Mechanics & Astronomy)2014,57,8:9
14Joint contractures in severe burn patients with early rehabilitation intervention in one of the largest burn intensive care unit in China:a descriptive analysis显示文摘Background:Joint contracture is the major clinical complication in burn patients,especially,the severe burn patients.This study aimed to investigate the number and severity of joint contractures in patients with burns affecting greater than or equal to 50%of the total body surface area(TBSA)undergoing early rehabilitation in a burn intensive care unit(BICU).Methods:We analyzed burn patients with burns affecting greater than or equal to 50%of the TBSA admitted to a BICU who received early rehabilitation within 7 days post-injury from January 2011 to December 2015.Demographic and medical information was collected.The range of motion(ROM)of different joints was measured 1 month post-admission.Spearman’s correlation coefficient and logistic regression analysis was used to determine predictors of the presence and severity of contractures.Result:The average affected TBSA of the included burn patients was 67.4%,and the average length of stay in the BICU was 46.2±28.8 days.One hundred and one of 108 burn patients(93.5%)developed at least one joint contracture.The ROM in 67.9%of the affected joints was mildly limited.The majority of contractures in severe burn patients were mild(37.7%)or moderate(33.2%).The wrist was the most commonly affected joint(18.2%),followed by the shoulder,ankle,hip,knee,and elbow.A predictor of the presence of contractures was the length of hospital stay(p=0.049).The severe contracture was related to the area of full-thickness burns,the strict bed rest time,and the duration of rehabilitation in BICU.The length of rehabilitation stay(days)in patients with moderate contracture is 54.5%longer than that in severe contracture(p=0.024)Conclusion:During the long stay in BICU,the length of rehabilitation stay in a BICU could decrease the severity of contractures from severe to moderate in the patients with equal to 50%of the TBSA.Hence,this research reveals the important role of early rehabilitation interventions in severe burn patients.Jianglin Tan Jian Chen Junyi Zhou Huapei Song Huan Deng Ming Ao Gaoxing Luo Jun Wu 2019Burns & Trauma2019,7,1:9
15Microstructure, mechanical and biodegradable properties of a Mg–2Zn–1Gd–0.5Zr alloy with different solution treatments显示文摘Solution treatment is a useful way to improve the degradation resistance of Mg alloys.In this work,effects of solution treatment temperature on mechanical and biodegradable properties of an extruded Mg–2Zn–1Gd–0.5Zr alloy were studied.Microstructure analysis,tensile test, three-point bending test, immersion test and electrochemical test were performed.The results showed that increasing solution temperature decreases the mechanical properties of the alloy.However, three-point bending test revealed that the solution-treated alloy at 510 ℃ could maintain 95% of its maximum bending force(Fmax) during the 28-day immersion period.After treatment at 510 ℃ for 5 h, all the second phases were dissolved into the alloy, the galvanic corrosion was inhibited, and the alloy exhibited good corrosion resistance with a corrosion rate of 0.35 mm·year-1 in Hank’s solution.Jun-Xiu Chen Ming Gao Li-Li Tan Ke Yang 2019Rare Metals2019,38,6:9
16A novel nonviral nanoparticle gene vector: Poly-L-lysine- silica nanoparticles显示文摘DNA delivery is a core technology for gene structure and function research as well as clinical settings. The ability to safely and efficiently targeted transfer foreign DNA into cells is a fundamental goal in biotechnology. With the development of nanobiotechnology, nanoparticle gene vectors brought about new hope to reach the goal. In our research, silica nanoparticles (SiNP) were synthesized first in a microemulsion system polyoxyethylene nonylphenyl ether (OP-10)/cyclohexane/ammonium hydroxide, at the same time the effects of SiNP size and its distribution were elucidated by orthogonal analysis; then poly-L-lysine (PLL) was linked on the surface of SiNP by nanoparticle surface energy and electrostatically binding; lastly a novel complex nanomate-rial-poly-L-lysine-silica nanoparticles (PLL-SiNP) wasprepared. The analysis of plasmid DNA binding and DNase I enzymatic degradation discovered that PLL-SiNP could bind DNA, and protect it against enzymatic degradation. Cell transfection showed thatShiguo Zhu Hongbin Lu Juanjuan Xiang Ke Tang Bicheng Zhang Ming Zhou Chen Tan Guiyuan Li 2002Chinese Science Bulletin2002,47,8:9
17Comparison of screening strategies for Lynch syndrome in patients with newly diagnosed endometrial cancer:a prospective cohort study in China显示文摘Background: The prevalence of Lynch syndrome and screening strategies for this disorder in Chinese patients with endometrial cancer have seldom been investigated. Such data would be essential for the screening, prevention, genetic counseling, and treatment of Lynch syndrome. The purpose of this prospective study was to determine the accuracy of the mismatch repair (MMR) protein immunohistochemistry (IHC), microsatellite instability (MSI) test, and clinical diagnostic criteria in screening for Lynch syndrome-associated endometrial cancer (LS-EC) in a prospective Chinese cohort. Methods: All patients with newly diagnosed endometrial cancer (EC) were evaluated using clinical diagnostic criteria (Amsterdam II criteria and the revised Bethesda guidelines), MSI test, and IHC of MMR proteins in tumor tissues. For all patients, the screening results were compared with results of germline sequencing for pathogenic variants of MMR genes. Results: Between December 2017 and August 2018, a total of 111 unselected patients with newly diagnosed EC were enrolled. Six patients (5.4%) harbored a pathogenic germline mutation of MMR genes: 1 had a mutation in MutL homolog 1 (MLH1), 2 in MutS homolog 2 (MSH2), and 3 in MutS homolog 6 (MSH6). The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) for identifying LS-EC were 33.3%, 88.6%, 14.3%, and 95.9%, for the clinical criteria, 66.7%, 75.0%, 14.3%, and 97.3% for IHC of MMR proteins, 100%, 89.9%, 33.3%, and 100% for MSI test, and 100%, 72.4%, 20.0% and 100% for combined IHC and MSI test, respectively. The combination of IHC and MSI test had higher sensitivity and PPV than the clinical criteria (p = 0.030). MSI test and IHC were highly concordant for LS-EC screening (73/77, 94.8%). Conclusion: The accuracy of the combination of IHC of MMR proteins and MSI test for screening LS among Chinese patients with EC was superior to that of the clinical criteria.Xiaopei Chao Lei Li Ming Wu Shuiqing Ma Xianjie Tan Sen Zhong Yalan Bi Jinghe Lang 2019Cancer Communications2019,39,1:8
18Clinical utility of Epstein-Barr virus DNA and other liquid biopsy markers in nasopharyngeal carcinoma显示文摘Nasopharyngeal carcinoma(NPC)is a malignant epithelial tumor ubiquitously associated with the Epstein-Barr virus(EBV),which is highly prevalent in South China,Southeast Asia,and North Africa.Despite being a highly radio-sensitive and treatable cancer,a majority of NPC patients are diagnosed in their advanced stage,and locoregional and distant relapses following definitive treatment contribute largely to cancer-specific mortality among these patients.Given that EBV-driven NPC is the predominant variant seen in endemic regions,various EBV detection methods have been developed and are utilized in screening,prognostication,and post-treatment surveillance of NPC patients.While the Immunoglobulin A(IgA)serology assay is the most extensively studied EBV detection method,the detection of plasma EBV DNA released during replication or cellular apoptosis has shown superior outcomes in endemic population screening,prognostication,and detection of distant relapse.Furthermore,there is emerging evidence on the use of circulating tumor cells,microRNAs,DNA hypermethylation,and combination assays in various clinical scenarios.Herein,this paper provides a comprehensive overview of the relevant studies using various EBV detection techniques in the management of NPC.Specifically,the recent advances,clinical evidence,and challenges associated with the clinical application of EBV liquid biopsies in population screening,prognostication,and surveillance of NPC are presented.Rong Tan Sean Kean Ann Phua Yoke Lim Soong Lynette Lin Ean Oon Kian Sing Chan Sasidharan Swarnalatha Lucky Jamie Mong Min Han Tan Chwee Ming Lim 2020Cancer Communications2020,40,11:8
19Cloning and expression of two sterol C-24 methyltransferase genes from upland cotton(Gossypium hirsuturm L.)显示文摘Brassinosteroids (BRs) are an important class of plant steroidal hormones that are essential in a wide variety of physiological proc-esses. Two kinds of intermediates,sitosterol and campesterol,play a crucial role in cell elongation,cellulose biosynthesis,and accumula-tion. To illuminate the effects of sitosterol and campesterol on the development of cotton (Gossypium hirsuturm L.) fibers through screening cotton fiber EST database and contigging the candidate ESTs,two key genes GhSMT2-1 and GhSMT2-2 controlling the sitos-terol biosynthesis were cloned from developing fibers of upland cotton cv. Xuzhou 142. The full length of GhSMT2-1 was 1,151 bp,in-cluding an 8 bp 5′-untranslated region (UTR),a 1,086 bp open reading frame (ORF),and a 57 bp 3′-UTR. GhSMT2-1 gene encoded a polypeptide of 361 amino acid residues with a predicted molecular mass of 40 kDa. The full length of GhSMT2-2 was 1,166 bp,including an 18 bp 5′-UTR,a 1,086 bp ORF,and a 62 bp 3′-UTR. GhSMT2-2 gene encoded a polypeptide of 361 amino acid residues with a pre-dicted molecular mass of 40 kDa. The two deduced amino acid sequences had high homology with the SMT2 from Arabidopsis thaliana and Nicotiana tabacum. Furthermore,the typical conserved structures characterized by the sterol C-24 methyltransferase,such as region I (LDVGCGVGGPMRAI),region Ⅱ (IEATCHAP),and region Ⅲ (YEWGWGQSFHF),were present in both deduced proteins. Southern blotting analysis indicated that GhSMT2-1 or GhSMT2-2 was a single copy in upland cotton genome. Quantitative real-time RT-PCR analysis revealed that the highest expression levels of both genes were detected in 10 DPA (day post anthesis) fibers,while the lowest levels were observed in cotyledon and leaves. The expression level of GhSMT2-1 was 10 times higher than that of GhSMT2-2 in all the organs and tissues detected. These results indicate that the homologue of sterol C-24 methyltransferase gene was cloned from upland cotton and both GhSMT2 genes play a crucial role in fiber elongation. The role of GhSMT2-1 may be more important than that of GhSMT2-2.Ming Luo,Kunling Tan,Zhongyi Xiao,Mingyu Hu,Peng Liao,Kuijun Chen Key Laboratory of Biotechnology and Crop Quality Improvement,Ministry of Agriculture Biotechnology Research Center,Southwest University,Chongqing 400716,China 2008Journal of Genetics and Genomics2008,35,6:8
20Establishment of one-step approach to detoxification of hypertoxic aconite based on the evaluation of alkaloids contents and quality显示文摘Aconite is a valuable drug and also a toxic material, which can be used only after detoxification processing. Although traditional processing methods can achieve detoxification effect as desired, there are some obvious drawbacks, including a significant loss of alkaloids and poor quality consistency. It is thus necessary to develop a new detoxification approach. In the present study, we designed a novel one-step detoxification approach by quickly drying fresh-cut aconite particles. In order to evaluate the technical advantages, the contents of mesaconitine, aconitine, hypaconitine, benzoylmesaconine, benzoylaconine, benzoylhypaconine, neoline, fuziline, songorine, and talatisamine were determined using HPLC and UHPLC/Q-TOF-MS. Multivariate analysis methods, such as Clustering analysis and Principle component analysis, were applied to determine the quality differences between samples. Our results showed that traditional processes could reduce toxicity as desired, but also led to more than 85.2% alkaloids loss. However, our novel one-step method was capable of achieving virtually the same detoxification effect, with only an approximately 30% alkaloids loss. Cluster analysis and Principal component analysis analyses suggested that Shengfupian and the novel products were significantly different from various traditional products. Acute toxicity testing showed that the novel products achieved a good detoxification effect, with its maximum tolerated dose being equivalent to 20 times of adult dosage. And cardiac effect testing also showed that the activity of the novel products was stronger than that of traditional products. Moreover, particles specification greatly improved the quality consistency of the novel products, which was immensely superior to the traditional products. These results would help guide the rational optimization of aconite processing technologies, providing better drugs for clinical treatment.ZHANG Ding-Kun HAN Xue TAN Peng LI Rui-Yu NIU Ming ZHANG Cong-En WANG Jia-Bo YANG Ming XIAO Xiao-He 2017Chinese Journal of Natural Medicines2017,15,1:8
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