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| 1 | 纳米多级孔分子筛:简短的综述(英文)显示文摘分子筛是一种三维微孔结构的硅铝酸盐晶体,具有灵活多变的骨架和组成、较高的物理和水热稳定性、无毒、高比表面积、离子可交换性以及很低的成本等特点,因而在油品精制、石油化学、农业、水和污水处理等众多领域中用作离子交换剂、催化剂和吸附剂.尽管分子筛的应用是基于其本身的微孔结构,但微孔也导致体积较大的反应物和产物分子的传质阻力高.通过制备纳米尺度和多级孔结构的分子筛等多种手段可克服常规分子筛所具有的传质限制.人们已经开发了多种方法制备了新型的分子筛材料,并考察了它们在各种催化反应和吸附反应中的性能.在反应体系中采用这种多级孔的纳米分子筛,有可能提高催化剂的使用寿命和催化性能,抑制积碳和失活.本综述概述了多级孔分子筛和纳米分子筛的高性能及其合成方法的最新进展,讨论了每个合成方法的优缺点,简述了纳米分子筛和二级孔结构分子筛的催化应用,并与常规分子筛进行了比较. | Esmat Koohsaryan Mansoor Anbia | 2016 | Chinese Journal of Catalysis2016，37，4： | 31 |
| 2 | Role of relevant immune-modulators and cytokines in hepatocellular carcinoma and premalignant hepatic lesions显示文摘AIM To assess the levels of different immune modulators in patients with hepatocellular carcinoma(HCC),in relation to other hepatic diseases.METHODS Eighty-eight patients were included in the current study and represented patients with HCC(20),liver cirrhosis(28) and chronic hepatitis(CH;25),and normal controls(NC;15).Peripheral blood was isolated for immunophenotyping of active myeloid dendritic cells(m DCs;CD1 c and CD40),mature inactive myeloid cells(CD1 c and HLA),active plasmacytoid cells(p DCs;CD303 and CD40),mature inactive p DCs(CD30 and HLA),active natural killer(NK) cells(CD56 and CD161),active NK cells(CD56 and CD314) and inactive NK cells(CD56 and CD158) was done by flow cytometry.Serum levels of interleukin(IL)-2,IL-10,IL-12,IL-1β,interferon(IFN)-α,IFN-γ and tumor necrosis factor(TNF)-αR2 were assessed by ELISA.RESULTS Active m DCs(CD1 C+/CD40+) and inactive m DCs(CD1 c+/HLA+) were significantly decreased in HCC patients in relation to NC(P < 0.001).CD40+ expression on active p DCs was decreased in HCC patients(P < 0.001),and its level was not significantly changed among other groups.Inactive p DCs(CD303+/HLA+),inactive NKs(CD56+/CD158+) and active NKs(CD56+/CD161+) were not statistically changed among the four groups studied;however,the latter was increased in CH(P < 0.05).NKG2 D was statistically decreased in HCC,CH and cirrhosis(P < 0.001),and it was not expressed in 63%(12/20) of HCC patients.There was significant decrease of IL-2,IFN-α and IFN-γ(P < 0.001),and a significant increase in IL-10,IL-1β,and TNF-αR2(P <0.01,P < 0.001 and P < 0.001;respectively) in HCC patients.There was inverted correlation between IL-12 and IL-1β in HCC(r =-0.565,P < 0.01),with a strong correlation between p DCs(CD303+/CD40+) and NKs(CD56+/CD161+;r = 0.512,P < 0.05) as well as inactive m DCs(CD1 c+/HLA+) and inactive NK cells(CD56+/CD158+;r = 0.945,P < 0.001).CONCLUSION NKG2 D,CD40,IL-2 and IL-10 are important modulators in the development and progression of HCC. | Abdel-Rahman N Zekri Somaya El Deeb Abeer A Bahnassy Abeer M Badr Mona S Abdellateif Gamal Esmat Hosny Salama Marwa Mohanad Ahmed Esam El-dien Shimaa Rabah Assmaa Abd Elkader | 2018 | World Journal of Gastroenterology2018，24，11： | 6 |
| 3 | Noninvasive assessment of hepatic fibrosis in Egyptian patients with chronic hepatitis C virus infection显示文摘AIM: To evaluate the accuracy of specific biochemical markers for the assessment of hepatic fibrosis in patients with chronic hepatitis C virus (HCV) infection. METHODS: One hundred and fifty-four patients with chronic HCV infection were included in this study; 124 patients were non-cirrhotic, and 30 were cirrhotic. The following measurements were obtained in all patients: serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), albumin, total bilirubin, prothrombin time and concentration, complete blood count, hepatitis B surface antigen (HBsAg), HCVAb, HCV-RNA by quantitative polymerase chain reaction, abdominal ultrasound and ultrasonic-guided liver biopsy. The following ratios, scores and indices were calculated and compared with the results of the histopathological examination: AST/ALT ratio (AAR), age platelet index (API), AST to platelet ratio index (APRI), cirrhosis discriminating score (CDS), Pohl score, G teborg University Cirrhosis Index (GUCI). RESULTS: AAR, APRI, API and GUCI demonstrated good diagnostic accuracy of liver cirrhosis (80.5%, 79.2%, 76.6% and 80.5%, respectively); P values were: < 0.01, < 0.05, < 0.001 and < 0.001, respectively. Among the studied parameters, AAR and GUCI gave the highest diagnostic accuracy (80.5%) with cutoff values of 1.2 and 1.5, respectively. APRI, API and GUCI were significantly correlated with the stage of fibrosis (P < 0.001) and the grade of activity (P < 0.001, < 0.001 and < 0.005, respectively), while CDS only correlated significantly with the stage of fibrosis (P < 0.001) and not with the degree of activity (P > 0.05). In addition, we found significant correlations for the AAR, APRI, API, GUCI and Pohl score between the non-cirrhotic (F0, F1, F2, F3) and cirrhotic (F4) groups (P values: < 0.001, < 0.05, < 0.001, < 0.001 and < 0.005, respectively; CDS did not demonstrate significant correlation (P > 0.05). CONCLUSION: The use of AAR, APRI, API, GUCI and Pohl score measurements may decrease the need for liver biopsies in diagnosing cirrhosis, especially in Egypt, where resources are limited. | Shawky Abdelhamid Fouad Serag Esmat Dalia Omran Laila Rashid Mohamed H Kobaisi | 2012 | World Journal of Gastroenterology2012，18，23： | 6 |
| 4 | Prevalence and risk factors of asymptomatic hepatitis C virus infection in Egyptian children显示文摘AIM: To identify the prevalence, risk factors and manifestations of asymptomatic hepatitis C virus (HCV) infection in Egyptian children. METHODS: Children at the age of 1-9 years were screened for HCV antibodies and alanine aminotransferase (ALT) levels. Every child with elevated ALT and/or detectable HCV antibodies was tested for HCV RNA by RT-PCR and compared with two negative controls for risk factors and signs and symptoms of liver disease.RESULTS: We screened 1042 children, six of them had elevated ALT, negative HCV antibody and positive RNA, likely representing acute hepatitis C cases. Fifteen children were HCV seropositive, 5 of them were HCV RNA positive. Asymptomatic HCV infection was present in 2.02% (positive results for either HCV antibodies or HCV-RNA or both). Symptoms such as diarrhea, abdominal pain, history of fatigue and school absence because of illness and risk factors such as dental care were significantly more common among HCV positive cases than among controls. None of the HCV positive children was diagnosed as having signs of advanced liver disease upon clinical or ultrasonographic examination. CONCLUSION: Asymptomatic HCV infection is detectable in 2.02% Egyptian children. | MS El-Raziky M El-Hawary G Esmat AM Abouzied N El-Koofy N Mohsen S Mansour A Shaheen M Abdel Hamid H El-Karaksy | 2007 | World Journal of Gastroenterology2007，13，12： | 4 |
| 5 | MTP genetic variants associated with non-alcoholic fatty liver in metabolic syndrome patients显示文摘This study was performed for investigation the relationship between variants of MTP gene polymorphism and the development of NAFLD in patients with and without MS.The study was included 174 NAFLD patients(106 with MS and 68 without MS),and 141 healthy control subjects.The 493 G/T polymorphism of MTP gene was evaluated by PCR-RFLP method.The frequency of MTP TT genotype and T allele were significantly higher in NAFLD patients when compared to healthy controls.Moreover,a significant association in MTP gene polymorphism was observed in NAFLD patients with MS compared to NAFLD patients without MS and controls.Our study suggested that MTP 493 G/T gene polymorphism may act as susceptibility biomarker for NAFLD and MS. | Weaam Gouda Esmat Ashour Yehia Shaker Wafaa Ezzat | 2017 | Genes & Diseases2017，4，4： | 4 |
| 6 | Occult hepatitis B virus infection among Egyptian blood donors显示文摘AIM:To identify blood donors with occult hepatitis B virus(HBV) infection(OBI) to promote safe blood donation.METHODS:Descriptive cross sectional study was conducted on 3167 blood donors negative for hepatitis B surface antigen(HBsAg),hepatitis C antibody(HCV Ab) and human immunodeficiency virus Ab.They were subjected to the detection of alanine aminotransferase(ALT) and aspartate transaminase(AST) and screening for anti-HBV core antibodies(total) by two different techniques;[Monoliza antibodies to hepatitis B core(Anti-HBc) Plus-Bio-Rad] and(ARC-HBc total-ABBOT).Positive samples were subjected to quantitative detection of antibodies to hepatitis B surface(anti-HBs)(ETI-AB-AUK-3,Dia Sorin-Italy).Serum anti-HBs titers > 10 IU/L was considered positive.Quantitative HBV DNA by real time polymerase chain reaction(PCR)(QIAGEN-Germany) with 3.8 IU/mL detection limit was estimated for blood units with negative serum anti-HBs and also for 32 whose anti-HBs serum titers were > 1000 IU/L.Also,265 recipients were included,34 of whom were followed up for 3-6 mo.Recipients were investigated for ALT and AST,HBV serological markers:HBsAg(ETI-MAK-4,Dia Sorin-Italy),anti-HBc,quantitative detection of anti-HBs and HBV-DNA.RESULTS:525/3167(16.6%) of blood units were positive for total anti-HBc,64% of those were antiHBs positive.Confirmation by ARCHITECT anti-HBc assay were carried out for 498/525 anti-HBc positive samples,where 451(90.6%) confirmed positive.Reactivity for anti-HBc was considered confirmed only if two positive results were obtained for each sample,giving an overall prevalence of 451/3167(14.2%) for total anti-HBc.HBV DNA was quantified by real time PCR in 52/303(17.2%) of anti-HBc positive blood donors(viral load range:5 to 3.5 x 105 IU/mL) with a median of 200 IU/mL(mean:1.8 x 104 ± 5.1 x 104 IU/mL).AntiHBc was the only marker in 68.6% of donors.Univariate and multivariate logistic analysis for identifying risk factors associated with anti-HBc and HBV-DNA positivity among blood donors showed that age above thirty and marriage were the most significant risk factors for prediction of anti-HBc positivity with AOR 1.8(1.4-2.4) and 1.4(1.0-1.9) respectively.Other risk factors as gender,history of blood transfusion,diabetes mellitus,frequent injections,tattooing,previous surgery,hospitalization,Bilharziasis or positive family history of HBV or HCV infections were not found to be associated with positive anti-HBc antibodies.Among anti-HBc positive blood donors,age below thirty was the most significant risk factor for prediction of HBV-DNA positivity with AOR 3.8(1.8-7.9).According to HBV-DNA concentration,positive samples were divided in two groups;group one with HBV-DNA ≥ 200 IU/mL(n = 27) and group two with HBV-DNA < 200 IU/mL(n = 26).No significant difference was detected between both groups as regards mean age,gender,liver enzymes or HBV markers.Serological profiles of all followed up blood recipients showed that,all were negative for the studied HBV markers.Also,HBV DNA was not detected among studied recipients,none developed post-transfusion hepatitis(PTH) and the clinical outcome was good.CONCLUSION:OBI is prevalent among blood donors.Nucleic acid amplification/HBV anti core screening should be considered for high risk recipients to eliminate risk of unsafe blood donation. | Zeinab N Said Manal H El Sayed Iman I Salama Enas K Aboel-Magd Magda H Mahmoud Maged El Setouhy Faten Mouftah Manal B Azzab Heidi Goubran Amal Bassili Gamal E Esmat | 2013 | World Journal of Hepatology2013，5，2： | 4 |
| 7 | Interplay between micro RNA-17-5p, insulin-like growth factor-Ⅱ through binding protein-3 in hepatocellular carcinoma显示文摘AIM: To investigate the effect of microR NA on insulinlike growth factor binding protein-3(IGFBP-3) and hence on insulin-like growth factor-Ⅱ(IGF-Ⅱ) bioavailability in hepatocellular carcinoma(HCC).METHODS: Bioinformatic analysis was performed using microrna.org, DIANA lab and Segal lab softwares. Total RNA was extracted from 23 HCC and 10 healthy liver tissues using mir Vana mi RNA Isolation Kit. microR NA-17-5p(miR-17-5p) expression was mimicked and antagonized in Hu H-7 cell lines using Hi Per Fect Transfection Reagent, then total RNA was extracted using Biozol reagent then reverse transcribed into cD NA followed by quantification of mi R-17-5p and IGFBP-3 expression using Taq Man real-time quantitative PCR. Luciferase reporter assay was performed to validate the binding of miR-17-5p to the 3'UTR of IGFBP-3. Free IGF-Ⅱ protein was measured in transfected Hu H-7 cells using IGF-Ⅱ ELISA kit. RESULTS: Bioinformatic analysis revealed IGFBP-3 as a potential target for miR-17-5p. Screening of miR-17-5p and IGFBP-3 revealed a moderate negative correlation in HCC patients, where mi R-17-5p was extensively underexpressed in HCC tissues(P = 0.0012), while IGFBP-3 showed significant upregulation in the same set of patients(P = 0.0041) compared to healthy donors. Forcing mi R-17-5p expression in Hu H-7 cell lines showed a significant downregulation of IGFBP-3 mR NA expression(P = 0.0267) and a significant increase in free IGF-Ⅱ protein(P = 0.0339) compared to mock untransfected cells using unpaired t-test. Luciferase assay validated IGFBP-3 as a direct target of mi R-17-5p; luciferase activity was inhibited by 27.5% in cells co-transfected with miR-17-5p mimics and the construct harboring the wild-type binding region 2 of IGFBP-3 compared to cells transfected with this construct alone(P = 0.0474).CONCLUSION: These data suggest that regulating IGF-Ⅱ bioavailability and hence HCC progression can be achieved through targeting IGFBP-3 via manipulating the expression of miR NAs. | Danira Ashraf Habashy Hend Mohamed El Tayebi Injie Omar Fawzy Karim Adel Hosny Gamal Esmat Ahmed Ihab Abdelaziz | 2016 | World Journal of Hepatology2016，8，23： | 3 |
| 8 | Analysis of Fractional-order Linear Systems with Saturation Using Lyapunov's Second Method and Convex Optimization显示文摘In this paper,local stability and performance analysis of fractional-order linear systems with saturating elements are shown,which lead to less conservative information and data on the region of stability and the disturbance rejection.Then,a standard performance analysis and global stability by using Lyapunov's second method are addressed,and the introduction of Lyapunov's function candidate whose sub-level set provide stability region and performance with a restricted state space origin is also addressed.The results include both single and multiple saturation elements and can be extended to fractional-order linear systems with any nonlinear elements and nonlinear noise that satisfy Lipschitz condition.A noticeable application of these techniques is analysis of control fractional-order linear systems with saturation control inputs. | Esmat Sadat Alaviyan Shahri Saeed Balochian | 2015 | International Journal of Automation and computing2015，12，4： | 3 |
| 9 | GSA: A Gravitational Search Algorithm显示文摘 | Esmat Rashedi Hossein Nezamabadi-pour Saeid Saryazdi | 2009 | Information Sciences2009，，13： | 3 |
| 10 | Epidemiological and clinical characteristics of inflammatory bowel diseases in Cairo,Egypt显示文摘AIM:To study the natural history,patterns and clinical characteristics of inflammatory bowel diseases(IBD)in Egypt.METHODS:We designed a case-series study in the gastroenterology centre of the Internal Medicine department of Cairo University,which is a tertiary care referral centre in Egypt.We included all patients in whom the diagnosis of ulcerative colitis(UC)or Crohn’s disease(CD)was confirmed by clinical,laboratory,endoscopic,histological and/or radiological criteria over the 15 year period from 1995 to 2009,and we studied their sociodemographic and clinical characteristics.Endoscopic examinations were performed by 2 senior experts.This hospital centre serves patients from Cairo,as well as patients referred from all other parts of Egypt.Our centre received 24156 patients over the described time period for gastro-intestinal consultations and/or interventions.RESULTS:A total of 157 patients with established IBD were included in this study.Of these,135 patients were diagnosed with UC(86%of the total),and 22patients,with CD(14%of the total).The mean ages at diagnosis were 27.3 and 29.7,respectively.Strikingly,we noticed a marked increase in the frequency of both UC and CD diagnoses during the most recent 10 years of the 15 year period studied.Regarding the gender distribution,the male:female ratio was 1:1.15 for UC and 2.6:1 for CD.The mean duration of follow up for patients with UC was 6.2±5.18 years,while the mean duration of follow up for patients with CD was 5.52±2.83 years.For patients with UC we found no correlation between the severity of the disease and the presence of extraintestinal manifestations.Eleven patients had surgical interventions during the studied years:4cases of total colectomy and 7 cases of anal surgery.CONCLUSION:We observed a ratio of 6:1 for UC to CD in our series.The incidence of IBD seems to be rising in Egypt. | Serag Esmat Mohamed El Nady Mohamed Elfekki Yehia Elsherif Mazen Naga | 2014 | World Journal of Gastroenterology2014，20，3： | 3 |
| 11 | Liver fibrosis: consensus recommendations of the Asian Pacific Association for the Study of the Liver (APASL)显示文摘 | Gamal Shiha Shiv Kumar Sarin Alaa Eldin Ibrahim Masao Omata Ashish Kumar Laurentius A. Lesmana Nancy Leung Nurdan Tozun Saeed Hamid Wasim Jafri Hitoshi Maruyama Pierre Bedossa Massimo Pinzani Yogesh Chawla Gamal Esmat Wahed Doss Taher Elzanaty Puja Sakhuj | 2009 | Hepatology International2009，，2： | 2 |
| 12 | Low-density lipoprotein receptor genetic polymorphism in chronic hepatitis C virus Egyptian patients affects treatment response显示文摘AIM: To correlate a genetic polymorphism of the low-density lipoprotein(LDL) receptor with antiviral responses in Egyptian chronic hepatitis C virus(HCV) patients.METHODS: Our study included 657 HCV-infected patients with genotype 4 who received interferonbased combination therapy. Patients were divided into two groups based on their response to therapy: 356 were responders, and 301 were non-responders. Patients were compared to 160 healthy controls. All patients and controls underwent a thorough physical examination, measurement of body mass index(BMI) and the following laboratory tests: serum alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, albumin, total bilirubin, direct bilirubin, prothrombin time, prothrombin concentration, INR, complete blood count, serum creatinine, fasting blood sugar, HCV antibody, and hepatitis B surface antigen. All HCV patients were further subjected to the following laboratory tests: HCV-RNA using quantitative polymerase chain reaction(PCR), antinuclear antibodies, thyroid-stimulating hormone, an LDL receptor(LDLR) genotype study of LDLR exon8 c.1171G>A and exon-10 c.1413G>A using real-time PCR-based assays, abdominal ultrasonography, ultrasonographic-guided liver biopsy, and histopathological examination of liver biopsies. Correlations of LDL receptor polymorphisms with HAI, METAVIR score, presence of steatosis, and BMI were performed in all cases.RESULTS: There were no statistically significant differences in response rates between the different types of interferon used or LDLR exon10 c.1413G>A. However, there was a significant difference in the frequency of the LDL receptor exon8 c.1171G>A genotype between cases(AA: 25.9%, GA: 22.2%, GG: 51.9%) and controls(AA: 3.8%, GA: 53.1% and GG: 43.1%)(P < 0.001). There was a statistically significant difference in the frequency of the LDLR exon 8C:1171 G>A polymorphism between responders(AA: 3.6%, GA: 15.2%, GG: 81.2%) and nonresponders(AA: 52.2%, GA: 30.6%, GG: 17.2%)(P < 0.001). The G allele of LDL receptor exon8 c.1171G>A predominated in cases and controls over the A allele, and a statistically significant association with response to interferon was observed. The frequency of the LDLR exon8 c.1171G>A allele in non-responders was: A: 67.4% and G: 32.6 vs A: 11.2% and G: 88.8% in responders(P < 0.001). Therefore, carriers of the A allele exhibited a 16.4 times greater risk for nonresponse. There was a significant association between LDL receptors exon8 c.1171G>A and HAI(P < 0.011). There was a significant association between LDL receptors exon8 c.1171G>A and BMI. The mean BMI level was highest in patients carrying the AA genotype(28.7 ± 4.7 kg/m2) followed by the GA genotype(28.1 ± 4.8 kg/m2). The lowest BMI was the GG genotype(26.6 ± 4.3 kg/m2)(P < 0.001). The only significant associations were found between LDL receptors exon8 c.1171G>A and METAVIR score or steatosis(P < 0.001).CONCLUSION: LDL receptor gene polymorphisms play a role in the treatment response of HCV and the modulation of disease progression in Egyptiansinfected with chronic HCV. | Mazen Naga Mona Amin Dina Algendy Ahmed Elbadry May Fawzi Ayman Foda Serag Esmat Dina Sabry Laila Rashed Samia Gabal Manal Kamal | 2015 | World Journal of Gastroenterology2015，21，39： | 2 |
| 13 | Evaluation of serum biomarkers of fibrosis and injury in Egyptian patients with chronic hepatitis C显示文摘 | Gamal Esmat Mohamed Metwally Khalid R. Zalata Shahinaz Gadalla Mohamed Abdel-Hamid Amr Abouzied Abdel-Aziz Shaheen Maissa El-Raziky Hani Khatab Sherif El-Kafrawy Nabiel Mikhail Laurence S. Magder Nezam H. Afdhal G. Thomas Strickland | 2007 | Journal of Hepatology2007，，4： | 2 |
| 14 | Expression of insulin-like growth factor-II, matrix metalloproteinases, and their tissue inhibitors as predictive markers in the peripheral blood of HCC patients显示文摘 | H.M. El Tayebi W. Salah I.H. El Sayed A.R.N. Zekri N. Zayed E.S. Salem G. Esmat A.I. Abdelaziz | 2011 | Biomarkers2011，，4： | 2 |
| 15 | Filter modeling using gravitational search algorithm显示文摘 | Esmat Rashedi Hossien Nezamabadi-pour Saeid Saryazdi | 2010 | Engineering Applications of Artificial Intelligence2010，，1： | 2 |
| 16 | GSA: A Gravitational Search Algorithm显示文摘 | Esmat Rashedi Hossein Nezamabadi-pour Saeid Saryazdi | 2009 | Information Sciences2009，，13： | 2 |
| 17 | miR-615-5p is restrictedly expressed in cirrhotic and cancerous liver tissues and its overexpression alleviates the tumorigenic effects in hepatocellular carcinoma显示文摘 | H.M. El Tayebi K.A. Hosny G. Esmat K. Breuhahn Ahmed Ihab Abdelaziz | 2012 | FEBS Letters2012，，19： | 2 |
| 18 | Repression of miR-17-5p with elevated expression of E2F-1 and c-MYC in non-metastatic hepatocellular carcinoma and enhancement of cell growth upon reversing this expression pattern显示文摘 | H.M. El Tayebi K. Omar S. Hegy M. El Maghrabi M. El Brolosy K.A. Hosny G. Esmat A.I. Abdelaziz | 2013 | Biochemical and Biophysical Research Communications2013，，3： | 2 |
| 19 | A pleiotropic effect of the single clustered hepatic metastamiRs miR-96-5pand miR-182-5p on insulin-like growth factor II, insulin-like growth factor-1receptor and insulin-like growth factor-binding protein-3 in hepatocellular carcinoma显示文摘 | Reem Assal Hend El Tayebi Karim Hosny Gamal Esmat Ahmed Abdelaziz | 2015 | Molecular Medicine Reports2015，，1： | 2 |
| 20 | Serum autoantibodies positivity prevalence in patients with chronic HCV and impact on pegylated interferon and ribavirin treatment response显示文摘 | Marwa Khairy Maissa El‐Raziky Wafaa El‐Akel Mohamed S. Abdelbary Hany Khatab Badawy El‐Kholy Gamal Esmat Mahassen Mabrouk | 2013 | Liver Int2013，，10： | 2 |
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