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1湍流模化的现状及发展趋势显示文摘本文讨论了湍流模化研究的发展现状,提出了今后湍流模式的可能改进途径。根据一组湍流封闭假定得到了各种2阶湍流模式,如Reynolds应力模式(RSM),代数应力模式(k-ε-A)及涡粘性模式(k-ε-E)。以自由剪切流、空腔流及通过偏心槽的流动为例作出了预报。虽然至今还不存在一个完备湍流模式,但2阶湍流模式已经具备了某些预报能力。湍流模化的不完备性可能要归咎于各向同性耗散和单湍流尺度等假定的不适当。利用多重湍流尺度概念,包括利用湍流涡的分维,可以改善湍流的预报。陈景仁 Sheng Yuh Jaw 胡晓强 赵渭军 1992力学进展1992,22,3:8
2Hepatitis C virus NS5A promotes insulin resistance through IRS-1 serine phosphorylation and increased gluconeogenesis显示文摘AIM: To investigate the mechanisms of insulin resistance in human hepatoma cells expressing hepatitis C virus(HCV) nonstructural protein 5A(NS5A).METHODS: The human hepatoma cell lines,Huh7 and Huh7.5,were infected with HCV or transientlytransfected with a vector expressing HCV NS5 A. The effect of HCV NS5 A on the status of the critical players involved in insulin signaling was analyzed using realtime quantitative polymerase chain reaction and Western blot assays. Data were analyzed using Graph Pad Prism version 5.0.RESULTS: To investigate the effect of insulin treatment on the players involved in insulin signaling pathway,we analyzed the status of insulin receptor substrate-1(IRS-1) phosphorylation in HCV infected cells or Huh7.5 cells transfected with an HCV NS5 A expression vector. Our results indicated that there was an increased phosphorylation of IRS-1(Ser307) in HCV infected or NS5 A transfected Huh7.5 cells compared to their respective controls. Furthermore,an increased phosphorylation of Akt(Ser473) was observed in HCV infected and NS5 A transfected cells compared to their mock infected cells. In contrast,we observed decreased phosphorylation of Akt Thr308 phosphorylation in HCV NS5 A transfected cells. These results suggest that Huh7.5 cells either infected with HCV or ectopically expressing HCV NS5 A alone have the potential to induce insulin resistance by the phosphorylation of IRS-1 at serine residue(Ser307) followed by decreased phosphorylation of Akt Thr308,Fox01 Ser256 and GSK3β Ser9,the downstream players of the insulin signalingpathway. Furthermore,increased expression of PECK and glucose-6-phosphatase,the molecules involved in gluconeogenesis,in HCV NS5 A transfected cells was observed.CONCLUSION: Taken together,our results suggest the role of HCV NS5 A in the induction of insulin resistance by modulating various cellular targets involved in the insulin signaling pathway.Fahed Parvaiz Sobia Manzoor Jawed Iqbal Mehuli Sarkar-Dutta Muhammad Imran Gulam Waris 2015World Journal of Gastroenterology2015,21,43:7
3Novel virulence factor dupA of Helicobacter pylori as an important risk determinant for disease manifestation:An overview显示文摘Helicobacter pylori(H.pylori)is a microaerophilic,Gram-negative,human gastric pathogen found usually in the mucous lining of stomach.It infects more than 50%of the world’s population and leads to gastroduodenal diseases.The outcome of disease depends on mainly three factors:Host genetics,environment and bacterial factors.Among these,bacterial virulence factors such as cagA,vacA are well known for their role in disease outcomes.However,based on the global epidemiological results,none of the bacterial virulence(gene)factors was found to be associated with particular diseases like duodenal ulcer(DU)in all populations.Hence,substantial importance has been provided for research in strain-specific genes outside the cag pathogenicity island,especially genes located within the plasticity regions.dupA found within the plasticity regions was first demonstrated in 2005 and was proposed for duodenal ulcer development and reduced risk of gastric cancer in certain geographical regions.Due to the discrepancies in report from different parts of the world in DU development related to H.pylori virulence factor,dupA became an interesting area of research in elucidating the role of this gene in the disease progression.In this review,we shed light on the detailed information available on the polymorphisms in dupA and their clinical relevance.We have critically appraised several pertinent studies on dupA and discussed their merits and shortcomings.This review also highlights dupA gene as an important biomarker for DU in certain populations.Jawed Alam Avijit Sarkar Bipul Chandra Karmakar Mou Ganguly Sangita Paul Asish K Mukhopadhyay 2020World Journal of Gastroenterology2020,26,32:5
4Procalcitonin,and cytokines document a dynamic inflammatory state in non-infected cirrhotic patients with ascites显示文摘AIM:To quantitate the simultaneous serum and ascitic fluid levels of procalcitonin and inflammatory markers in cirrhotics with and without ascites.METHODS:A total of 88 consecutive severe cirrhotic patients seen in a large city hospital liver clinic were studied and divided into two groups,those with and without ascites.Group 1 consisted of 41 cirrhotic patients with massive ascites,as demonstrated by necessity for therapeutic large-volume paracentesis.Group 2consisted of 47 cirrhotic patients without any clinically documented ascites to include either a recent abdominal computed tomography scan or ultrasound study.Serum and ascitic fluid levels of an array of inflammatory markers,including procalcitonin,were measured and compared to each other and a normal plasma panel(NPP).RESULTS:The values for inflammatory markers assayed in the serum of Groups 1 and 2,and ascitic fluid of the Group 1.The plasma levels of the inflammatory cytokines interleukin(IL)-2,IL-4,IL-6,IL-8,interferon gamma(IFNγ)and epidermal growth factor(EGF)were all significantly greater in the serum of Group 1as compared to that of the serum obtained from the Group 2 subjects(all P<0.05).There were significantly greater serum levels of IL-6,IL-8,IL-10,monocyte chemoattractant protein-1,tumor necrosis factor-α,vascular endothelial growth factor and EGF when comparing Group 2 to the NPP.There was no significant difference for IL-1A,IL-1B,IL-2,IL-4 and IFNγlevels between these two groups.Serum procalcitonin levels were increased in cirrhotics with ascites compared to cirrhotics without ascites,but serum levels were similar to ascites levels within the ascites group.Furthermore,many of these cytokines,but not procalcitonin,demonstrate an ascites-to-serum gradient.Serum procalcitonin does not demonstrate any significant difference segregated by liver etiology in the ascites group;but ascitic fluid procalcitonin is elevated significantly in car-diac cirrhosis/miscellaneous subgroup compared to the hepatitis C virus and alcoholic cirrhosis subgroups.CONCLUSION:Procalcitonin in the ascitic fluid,but not in the serum,differentiates between cirrhotic subgroup reflecting the dynamic interplay of ascites,bacterial translocation and the peri-peritoneal cytokine.Bashar M Attar Christopher M Moore Magdalena George Nicolae Ion-Nedelcu Rafael Turbay Annamma Zachariah Guiliano Ramadori Jawed Fareed David H Van Thiel 2014World Journal of Gastroenterology2014,20,9:4
5Early Helicobacter pylori Eradication Decreases Risk of Gastric Cancer in Patients With Peptic Ulcer Disease显示文摘Chun–Ying Wu Ken N. Kuo Ming–Shiang Wu Yi–Ju Chen Chang–Bi Wang Jaw–Town Lin 2009Gastroenterology2009,,5:4
6Pattern of rubber bullet injuries in the lower limbs: A report from Kashmir显示文摘Shabir Ahmed Dhar Tahir Ahmed Dar Sharief Ahmed Wani Saheel Maajid Jawed Ahmed Bhat Naseer Ahmed Mir Imtiyaz Hussain Dar Shahid Hussain 2016Chinese Journal of Traumatology2016,19,3:3
7Genotypes and Viremia of Hepatitis B and D Viruses Are Associated With Outcomes of Chronic Hepatitis D Patients显示文摘Chien–Wei Su Yi–Hsiang Huang Teh–Ia Huo Hsuan Hui Shih I–Jane Sheen Su–Wen Chen Pui–Ching Lee Shou–Dong Lee Jaw–Ching Wu 2006Gastroenterology2006,,6:3
8Outcomes of neoadjuvant chemoradiotherapy followed by radical resection for T4 colorectal cancer显示文摘BACKGROUND Patients with clinical T4 colorectal cancer(CRC)have a poor prognosis because of compromised surgical margins.Neoadjuvant therapy may be effective in downstaging tumors,thereby rendering possible radical resection with clear margins.AIM To evaluate tumor downsizing and resection with clear margins in T4 CRC patients undergoing neoadjuvant concurrent chemoradiotherapy followed by surgery.METHODS This study retrospectively included 86 eligible patients with clinical T4 CRC who underwent neoadjuvant concurrent chemoradiotherapy followed by radical resection.Neoadjuvant therapy consisted of radiation therapy at a dose of 45-50.4 Gy and chemotherapy agents,either FOLFOX or capecitabine.A circumferential resection margin(CRM)of<1 mm was considered to be a positive margin.We defined pathological complete response(p CR)as the absence of any malignant cells in a specimen,including the primary tumor and lymph nodes.A multivariate logistic regression model was used to identify independent predictive factors for p CR.RESULTS For 86 patients who underwent neoadjuvant chemoradiotherapy and surgery,the rate of p CR was 14%,and the R0 resection rate was 91.9%.Of the 61 patients with rectal cancer,7(11.5%)achieved p CR and 5(8.2%)had positive CRMs.Of the 25 patients with colon cancer,5(20%)achieved p CR and 2(8%)had positive CRMs.We observed that the FOLFOX regimen was an independent predictor of p CR(P=0.046).After a median follow-up of 47 mo,the estimated 5-year overall survival(OS)and disease-free survival(DFS)rates were 70.8%and 61.4%,respectively.Multivariate analysis revealed that a tumor with a negative resection margin was associated with improved DFS(P=0.014)and OS(P=0.001).Patients who achieved p CR exhibited longer DFS(P=0.042)and OS(P=0.003)than those who did not.CONCLUSION Neoadjuvant concurrent chemoradiotherapy engenders favorable p CR and R0 resection rates among patients with T4 CRC.The R0 resection rate and p CR are independent prognostic factors for patients with T4 CRC.Chun-Ming Huang Ching-Wen Huang Cheng-Jen Ma Hsiang-Lin Tsai Wei-Chih Su Tsung-Kun Chang Ming-Yii Huang Jaw Yuan Wang 2020World Journal of Gastrointestinal Oncology2020,12,12:2
9Effect of thrombectomy on oedema progression and clinical outcome in patients with a poor collateral profile显示文摘Background and purpose The impact of the cerebral collateral circulation on lesion progression and clinical outcome in ischaemic stroke is well established.Moreover,collateral status modifies the effect of endovascular treatment and was therefore used to select patients for therapy in prior trials.The purpose of this study was to quantify the effect of vessel recanalisation on lesion pathophysiology and clinical outcome in patients with a poor collateral profile.Materials and methods 129 patients who had an ischaemic stroke with large vessel occlusion in the anterior circulation and a collateral score(CS)of 0-2 were included.Collateral profile was defined using an established 5-point scoring system in CT angiography.Lesion progression was determined using quantitative lesion water uptake measurements on admission and follow-up CT(FCT),and clinical outcome was assessed using modified Rankin Scale(mRS)scores after 90 days.Results Oedema formation in FCT was significantly lower in patients with vessel recanalisation compared with patients with persistent vessel occlusion(mean 19.5%,95%CI:17%to 22%vs mean 27%,95%CI:25%to 29%;p<0.0001).In a multivariable linear regression analysis,vessel recanalisation was significantly associated with oedema formation in FCT(ß=−7.31,SD=0.015,p<0.0001),adjusted for CS,age and Alberta Stroke Program Early CT Score(ASPECTS).Functional outcome was significantly better in patients following successful recanalisation(mRS at day 90:4.5,IQR:2-6 vs 5,IQR:5-6,p<0.001).Conclusion Although poor collaterals are known to be associated with poor outcome,endovascular recanalisation was still associated with significant oedema reduction and comparably better outcome in this patient group.Patients with poor collaterals should not generally be excluded from thrombectomy.Gabriel Broocks Andre Kemmling Tobias Faizy Rosalie McDonough Noel Van Horn Matthias Bechstein Lukas Meyer Gerhard Schon Jawed Nawabi Jens Fiehler Helge Kniep Uta Hanning 2021Stroke & Vascular Neurology2021,6,2:2
10Endogenous Release of Tissue Factor Pathway Inhibitor by Topical Application of an Ointment Containing Mucopolysaccharide Polysulfate to Nonhuman Primates显示文摘Debra A. Hoppensteadt Jawed Fareed Phillip Raake Wolfram Raake 2001Thrombosis Research2001,,2:2
11Balloon Dilation With Adequate Duration Is Safer Than Sphincterotomy for Extracting Bile Duct Stones: A Systematic Review and Meta-analyses显示文摘Wei–Chih Liao Yu–Kang Tu Ming–Shiang Wu Hsiu–Po Wang Jaw–Town Lin Joseph W. Leung Kuo–Liong Chien 2012Clinical Gastroenterology and Hepatology2012,,10:2
12GDF15 promotes prostate cancer bone metastasis and colonization through osteoblastic CCL2 and RANKL activation显示文摘Bone metastases occur in patients with advanced-stage prostate cancer(PCa). The cell-cell interaction between PCa and the bone microenvironment forms a vicious cycle that modulates the bone microenvironment, increases bone deformities, and drives tumor growth in the bone. However, the molecular mechanisms of PCa-mediated modulation of the bone microenvironment are complex and remain poorly defined. Here, we evaluated growth differentiation factor-15(GDF15) function using in vivo preclinical PCa-bone metastasis mouse models and an in vitro bone cell coculture system. Our results suggest that PCa-secreted GDF15 promotes bone metastases and induces bone microarchitectural alterations in a preclinical xenograft model. Mechanistic studies revealed that GDF15 increases osteoblast function and facilitates the growth of PCa in bone by activating osteoclastogenesis through osteoblastic production of CCL2 and RANKL and recruitment of osteomacs. Altogether, our findings demonstrate the critical role of GDF15 in the modulation of the bone microenvironment and subsequent development of PCa bone metastasis.Jawed Akhtar Siddiqui Parthasarathy Seshacharyulu Sakthivel Muniyan Ramesh Pothuraju Parvez Khan Raghupathy Vengoji Sanjib Chaudhary Shailendra Kumar Maurya Subodh Mukund Lele Maneesh Jain Kaustubh Datta Mohd Wasim Nasser Surinder Kumar Batra 2022Bone Research2022,10,1:2
13Determination Of specific activity Of recombinant himdin using a thrombin titration method显示文摘Lalithalyer and Jawed Fareed 1995Thrombosis Research1995,,78:1
14Spiral computed tomography in the diagnosis of renal masses显示文摘Rankin SC Webb JAW Reznek RH 2000BJU International2000,86,1:1
15External fixation of unstable metacarpal and phalangeal fractures显示文摘Parsons SW Fitazgerald JAW Searer JR 1992J Hand Surg1992,17,:1
16Determination of specific activity of recombinant hirudin using a thrombin titration method 显示文摘Lalitha L Jawed F 1995Thromb Res1995,78,3:1
17Status of the contamination in sediments and biota from the western Beaufort Sea(Alaska)显示文摘Valette-Silver N Jawed Hameedi M Efurd D W 1999Marine Pollution Bulletin1999,38,8:1
18Predicting residence time distributions in a single screw extruder from operating conditions 显示文摘Yeh An-I Jaw Yih-Mon 1999Journal of Food Engineering1999,39,1:1
19Determinants of Profitability of Banking Sector in India显示文摘Majid Karimzadeh Jawed Akhtar S M Behzad Karimzadeh 2013South Asia Paper Transit Stud Rev2013,20,2:1
20Application of cell mapping methods to a discontinuous dynamic system显示文摘van der Spek JAW de Hoon CAL de Kraker A 0,,01:1
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