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| 1 | Association between low molecular polypeptide 7 single nucleotide polymorphism and response to therapy in hepatitis C virus infection显示文摘AIM: To investigate the relationship between low molecular polypeptide-7 (LMP-7) gene polymorphism and response to interferon (IFN) therapy in chronic hepatitis C virus (HCV) patients. METHODS: LMP-7 polymorphism at codon 49 with nucleotide substitution from A to C was amplified in 104 chronic HCV patients of genotype 4. The amplicons were digested with restriction endonuclease Bsm I and the produced restriction fragment length polymorphism was analyzed. Patients received IFN + regional blood volume therapy for 48 wk and the frequency of thissingle nucleotide polymorphism (SNP) was statistically correlated with treatment response. The exclusion criteria for these patients were stated by the national health program for treating viral hepatitis. Main exclusion criteria included co-infection with hepatitis B virus or schistosomiasis, thyroid dysfunction, uncontrolled diabetes mellitus, history of long term drug or alcohol intake and autoimmune hepatitis. Multivariate analyses were done to correlate LMP-7 SNP plus several factors such as age, gender, weight, serum alpha-fetoprotein (AFP) and alanine aminotransferase levels, liver activity, fibrosis score and viral load with response to therapy. RESULTS: The data presented in this study clearly demonstrated statistically significant differences between sustained virological response (SVR) (defined as the absence of HCV RNA levels in the patient's sera at least 6 mo after discontinuation of treatment) and non-response (NR) (where HCV RNA levels in the patient's sera never become undetectable for 6 mo during or after treatment). Variables were described as odds ratio with 95%CI. The data were considered significant if P values were ≤ 0.05; highly significant if P < 0.01 and very highly significant if P < 0.001. Current data showed that 91.7% of patients carrying LMP-7 C/C allele were associated with SVR, while the other two genotypes C/A and A/A were associated with NR patients, 83.3% and 64.3% respectively, showing that genotype CC was strongly associated with response to interferon (95%CI: 12.0719-134.6572, P = 0.0001). The majority of parameters recorded in SVR and NR patients included higher values of mean age (P = 0.004), alanine aminotransferase (P = 0.001), AFP (P = 0.001), body weight (P = 0.025), viral load (P = 0.025), higher fibrosis and histological activity index indices among NR vs SVR patients. Also, the multivariate statistical analysis of the different factors of fibro-sis score, liver activity grade, genotypes and alleles of LMP-7 gene polymorphism in responders and NRs of HCV patients in this study showed that HCV patients with A allele had a very highly significant association with the NRs, high fibrosis and higher liver activity, while the C allele had a very highly significant association with the responders, low fibrosis and lower liver activity (95%CI: 3.5800-13.2519, P = 0.0001).CONCLUSION: LMP-7 SNP is a candidate gene that should be considered when designing a mathematical model for predicting response to therapy and disease progression in HCV patients. | Moataza H Omran Basma E Fotouh Samar S Youssef Noha E Ibrahim Wael Nabil EL-Sayed M Mahdy Wafaa G Shosha Mostafa K El-Awady | 2013 | World Journal of Hepatology2013，5，3： | 4 |
| 2 | Flow cytometric detection of hepatitis C virus antigens in infected peripheral blood leukocytes: Binding and entry显示文摘AIM: We designed two synthetic-core-specific peptides core 1 (C1) and core 2 (C2), and an E1-specific peptide (E1). We produced specific polyclonal antibodies againstthese peptides and used the antibodies for detection of HCV antigens on surface and within infected peripheral blood leukocytes.METHODS: Peripheral blood from a healthy individual who tested negative for HCV RNA was incubated with HCV type 4 infected serum for 1 h and 24 h at 37 ℃. Cells were stained by direct and indirect immunofluorescence and measured by flow cytometry.RESULTS: After 1 h of incubation, antibodies against C1,C2, and E1 detected HCV antigens on the surface of 27%,26% and 73% of monocytes respectively, while 10%, 5% and 9% of lymphocytes were positive with anti-C1, anti-C2 and anti-E1 respectively. Only 1-3% of granulocytes showed positive staining with anti-C1, anti-C2 and anti E1 antibodies. After 24 h of incubation, we found no surface staining with anti-C1, anti-C2 or anti-E1. Direct immunostaining using anti-C2 could not detect intracellular HCV antigens, after 1 h of incubation with the virus, while after 24 h of incubation, 28% of infected cells showed positive staining. Only plus strand RNA was detectable intracellularly as early as 1 h after incubation, and remained detectable throughout 48 h post-infection.Interestingly, minus RNA strand could not be detected after 1 h, but became strongly detectable intracellularly after 24 h post-infection.CONCLUSION: Monocytes and lymphocytes are the preferred target cells for HCV infection in peripheral blood leukocytes. Our specific anti-core and anti-E1 antibodies are valuable reagents for demonstration of HCV cell cycle.Also, HCV is capable of infecting and replicating in peripheral blood mononuclear cells as confirmed by detection of minus strand HCV RNA as well as intracellular staining of core HCV antigen. | Mostafa K El-Awady Ashraf A Tabll El-Rashdy M Redwan Samar Youssef Moataza H Omran Fouad Thakeb Maha El-Demellawy | 2005 | World Journal of Gastroenterology2005，11，33： | 4 |
| 3 | HepG2 cells support viral replication and gene expression of hepatitis C virus genotype 4 in vitro显示文摘瞄准:与丙肝的长期的复制建立一个房间文化系统病毒(HCV ) 染色体和病毒的抗原的表示在试管内。方法:HepG2 房间线被孵化与长期的丙肝从一个病人与浆液为它的危险性测试到 HCV。房间和上层清液在文化期间在各种各样的时间点被收获。文化上层清液为它感染天真的房间的能力被测试。存在减(反感觉) 在房间的核心和 E1 抗原的 RNA 海滨,和察觉被 RT-PCR 和免疫学的技术(流动血细胞计数和西方的污点) 分别地检验。结果:细胞内部的 HCV RNA 首先在 d 上被检测 3 在感染以后然后能一致地在至少三个月的一个时期上在房间和上层清液被检测。新鲜房间能从有教养的感染的房间感染上层清液。流动 cytometric 分析证明表面和在房子里使用的细胞内部的 HCV 抗原表示使 polyclonal 成为了抗体(反核心,和 anti-E1 ) 。西方的污点分析证明在分子量的产生免疫性的肽的簇的表示在一个月内在 31 和 45 kDa 之间延长了感染的房间的旧文化而这簇在 uninfected HepG2 房间是无法发现的。结论:HepG2 房间线产生 HCV 感染而且支持它的复制在试管内不仅。HCV 结构的蛋白质的表示能在感染的 HepG2 房间被检测。这些房间也能够流病毒的粒子进接着对 uninfected 房间变得传染的培养基。 | Mostafa K El-Awady Ashraf A Tabll Yasmine S El-Abd Mahmoud M Bahgat Hussein A Shoeb Samar S Youssef Noha G Bader El Din El-Rashdy M Redwan Maha El-Demellawy Moataza H Omran Wael T El-Garf Said A Goueli | 2006 | World Journal of Gastroenterology2006，12，30： | 2 |
| 4 | 在有煽动性、非煽动性的腹的疼痛显型的孩子的 interleukin-6 和桅杆房间的反的关系显示文摘 AIM: To investigate interleukin-6 (IL-6), mast cells, enterochromaffin cells, 5-hydroxytryptamine, and substance P in the gastrointestinal mucosa of children with abdominal pain. METHODS: Formalin-fixed paraffin-embedded gas-trointestinal biopsy blocks from patients (n = 48) with non-inflammatory bowel disease (irritable bowel syndrome and functional abdominal pain) and inflammatory bowel disease were sectioned and stained for IL-6, mast cells, enterochromaffin cells, 5-hydroxytryptamine, and substance P. All children had chronic abdominal pain as part of their presenting symptoms. Biopsy phenotype was confirmed by a pathologist, blinded to patient information. Descriptive statistics, chi-square, and independent sample t tests were used to compare differences between the inflammatory and non-inflammatory groups. RESULTS: The cohort (n = 48), mean age 11.9 years (SD = 2.9), 54.2% females, 90% Caucasian, was comprised of a non-inflammatory (n = 26) and an inflammatory (n = 22) phenotype. There was a significant negative correlation between substance P expression and mast cell count (P = 0.05, r = -0.373). Substance P was found to be expressed more often in female patient biopsies and more intensely in the upper gastrointestinal mucosa as compared to the lower mucosa. There were significantly increased gastrointestinal mucosal immunoreactivity to IL-6 (P = 0.004) in the inflammatory phenotype compared to non-inflammatory. Additionally, we found significantly increased mast cells (P = 0.049) in the mucosa of the non-inflammatory phenotype compared to the inflammatory group. This difference was particularly noted in the lower colon biopsies. CONCLUSION: The findings of this study yield preliminary evidence in identifying biomarkers of undiagnosed abdominal pain in children and may suggest candidate genes for future evaluation. | Wendy A Henderson Ravi Shankar Tara J Taylor Arseima Y Del Valle-Pinero David E Kleiner Kevin H Kim Nader N Youssef | 2012 | World Journal of Gastrointestinal Pathophysiology2012，3，6： | 2 |
| 5 | Comparison of methods to detect biosurfactant production by diverse microorganisms 显示文摘 | Youssef N H Duncan K E Nagle D P | 2004 | Journal of Microbiological Methods2004，56，3： | 1 |
| 6 | Modelling and opti mization of multiple-aspect RMS configurations显示文摘 | YOUSSEF A M A ELMARAGHY H A | 2006 | Interna tional Journal of Production Research2006，44，22： | 1 |
| 7 | Substitution of wheat starch with non-wheat starches and cross-linked waxy barley starch affects sensory properties and staling of Arabic bread显示文摘 | Imad T Youssef H Sossy S et a1 | 1999 | Journal of the Science of Food and Agriculture1999，79，： | 1 |
| 8 | Optimal configura tion selection for reconfigurable manufacturing systems显示文摘 | YOUSSEF A M A ELMARAGHY H A | 2007 | International Journal of Flexible Manufacturing Systems2007，19，2： | 1 |
| 9 | Influence of r-irradiation on the bioconversion of rice straw by Tricho-derma vi ride显示文摘 | Youssef Bothaina M Aziz N H | 1999 | Into Single Cell Protein1999，97，386： | 1 |
| 10 | Polyethylenimine-impregnated mesoporous silica:Effect of amine loading and surface alkyl chains on CO2 adsorption显示文摘 | Aliakbar H G Youssef B Abdelhamid S | 2011 | Langmuir2011，27，12： | 1 |
| 11 | Evolutionary algorithms,simulated annealing and tabu search:a comparative study显示文摘 | Youssef H Sai S M Adiche H | 2001 | Engineering Applications of Artificial Intelligence2001，14，2： | 1 |
| 12 | Skeletal muscle reinnervation by reduced axonal numbers results in whole muscle force deficits显示文摘 | Cederna PS Youssef MKH Asato H | 2000 | Plast Reconstr Surg2000，105，6： | 1 |
| 13 | Effect of subclinical lead toxicity on the im munerespone of chickens to Newcastle disease virus vaccine显示文摘 | Youssef S A H | 1996 | Res Vet Sci1996，60，： | 1 |
| 14 | Seismic performance of RC frames with concentric internal steel bracing 显示文摘 | YOUSSEF M A GHAFFARZADEH H M Nehdi | 2007 | Engineering Structures2007，29，： | 1 |
| 15 | Hypotensive resuscitation in patients with ruptured abdominal aortic aneurysm显示文摘 | Roberts K Revell M Youssef H | 2006 | Eur J Vasc Endovasc Surg2006，31，4： | 1 |
| 16 | Self-sustained phase shift modulated resonant converters:modeling,design,and performance显示文摘 | YOUSSEF M Z PINHEIRO H JAIN P K | 2006 | IEEE Transactions on Power Electronics2006，21，2： | 1 |
| 17 | Optimal eonfiguration selection for reeonfigurable manufacturing systems 显示文摘 | YOUSSEF A M A ELMARAGHY H A | 2007 | International Journal of Flexible Manufacturing Systems2007，19，2： | 1 |
| 18 | New Static Var Compensator Control Strategy and Coordina- tion with Under-load Tap Changer显示文摘 | Flexible AC Transmission Sys- in England by TJ lnternation ABDEL-RAHMAN M H YOUSSEF F M H SABER A A | 2006 | IEEE Transactions on Power Delivery2006，21，3： | 1 |
| 19 | Seismic performance of RC frames with concentric internal steel bracing显示文摘 | Youssef M A Ghaffarzadeh H Nehdi M | 2007 | Engineering Structures2007，29，15： | 1 |
| 20 | Seismic design and analysis of underground structures 显示文摘 | Youssef M A H Jeffrey J H Birger S | 2001 | Tunelling and Underground Space Technology2001，16，4： | 1 |
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