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| 1 | Hepatitis B virus mutations potentially conferring adefovir/ tenofovir resistance in treatment-naive patients显示文摘Anti-hepatitis B virus(HBV)therapy leads to the emer- gence of mutant viral strains during the treatment of chronic hepatitis B with nucleos(t)ides analogues. The existence of HBV variants with primary antiviral resistance may be important for treatment choice. We studied two patients with chronic HBV infection by sequencing the HBV polymerase gene.They had adefovir-and tenofovir-related mutations in the viral polymerase,although they had never been treated. These mutations were rtV214A/rtN238T in one patient and rtA194T in the other.Thus,mutations in untreated patients deserve cautious surveillance.These data indicate that mutations that can theoretically confer adefovir or tenofovir resistance may emerge in treatmentnaive patients. | Rebecca Pastor Franois Habersetzer Samira Fafi-Kremer Michel Doffoёl Thomas F Baumert Jean-Pierre Gut Franoise Stoll-Keller Evelyne Schvoerer | 2009 | World Journal of Gastroenterology2009，15，6： | 6 |
| 2 | Neutralizing antibodies in hepatitis C virus infection显示文摘Hepatitis C virus (HCV) is a major cause of hepatitis world-wide. The majority of infected individuals develop chronic hepatitis which can then progress to liver cirrhosis and hepatocellular carcinoma. Spontaneous viral clearance occurs in about 20%-30% of acutely infected individuals and results in resolution of infection without sequaelae. Both viral and host factors appear to play an important role for resolution of acute infection. A large body of evidence suggests that a strong, multispecific and long-lasting cellular immune response appears to be important for control of viral infection in acute hepatitis C. Due too the lack of convenient neutralization assays, the impact of neutralizing responses for control of viral infection had been less defined. In recent years, the development of robust tissue culture model systems for HCV entry and infection has finally allowed study of antibody-mediated neutralization and to gain further insights into viral targets of host neutralizing responses. In addition, detailed analysis of antibody-mediated neutralization in individual patients as well as cohorts with well defined viral isolates has enabled the study of neutralizing responses in the course of HCV infection and characterization of the impact of neutralizing antibodiesfor control of viral infection. This review will summarize recent progress in the understanding of the molecular mechanisms of antibody-mediated neutralization and its impact for HCV pathogenesis. | Mirjam B Zeisel Samira Fafi-Kremer Isabel Fofana Heidi Barth Franoise Stoll-Keller Michel Doffo■l Thomas F Baumert | 2007 | World Journal of Gastroenterology2007，13，36： | 3 |
| 3 | Can baseline ML Flow test results predict leprosy reactions? An investigation in a cohort of patients enrolled in the uniform multidrug therapy clinical trial for leprosy patients in Brazil显示文摘Background:The predictive value of the serology to detection of IgM against the Mycobacterium leprae-derived phenolic glycolipid-I/PGL-I to identify leprosy patients who are at higher risk of developing reactions remains controversial.Whether baseline results of the ML Flow test can predict leprosy reactions was investigated among a cohort of patients enrolled in The Clinical Trial for Uniform Multidrug Therapy for Leprosy Patients in Brazil(U-MDT/CT-BR).Methods:This was a descriptive study focusing on the main clinical manifestations of leprosy patients enrolled in the U-MDT/CT-BR from March 2007 to February 2012 at two Brazilian leprosy reference centers.For research purposes,753 leprosy patients were categorized according to a modified Ridley-Jopling(R&J)classification and according to the development of leprosy reactions(reversal reaction/RR and erythema nodosum leprosum/ENL),and whether they had a positive or negative bacillary index/BI.Results:More than half of the patients(55.5%)reported leprosy reaction:18.3%(138/753)had a RR and 5.4%(41/753)had ENL.Leprosy reactions were more frequent in the first year following diagnosis,as seen in 27%(205/753)of patients,while 19%(142/753)developed reactions during subsequent follow-up.Similar frequencies of leprosy reactions and other clinical manifestations were observed in paucibacillary(PB)and multibacillary(MB)leprosy patients treated with U-MDT and regular MDT(R-MDT)(P=0.43 and P=0.61,respectively).Compared with PB patients,leprosy reactions were significantly more frequent in MB patients with a high BI,and more patients developed RR than ENL.However,RR and neuritis were also reported in patients with a negative BI.At baseline,the highest rate of ML Flow positivity was observed in patients with a positive BI,especially those who developed ENL,followed by patients who had neuritis and RR.Among reaction-free patients,81.9%were ML Flow positive,however,the differences were not statistically significant compared to reactional patients(P=0.45).Conclusions:MB and PB patients treated with R-MDT and U-MDT showed similar frequencies of RR and other clinical manifestations.Positive ML Flow tests were associated with MB leprosy and BI positivity.However,ML Flow test results at baseline showed limited sensitivity and specificity for predicting the development of leprosy reactions. | Emerith Mayra Hungria Regiane Morillas Oliveira Gerson Oliveira Penna Lúcio Cartaxo Aderaldo Maria Araci de Andrade Pontes Rossilene Cruz Heitor de SáGonçalves Maria Lúcia Fernandes Penna Ligia Regina Franco Sansigolo Kerr Mariane Martins de Araújo Stefani Samira Bührer-Sékula | 2016 | Infectious Diseases of Poverty2016，5，1： | 2 |
| 4 | In vitro digestibility of bioactive peptides derived from bovine β- lactoglobulin 显示文摘 | Samira Rou k Sylvie F Gauthier Sylvie L Turgeon | 2006 | Int Dairy J2006，16，： | 1 |
| 5 | Exosomes for targeted siRNA delivery across biological barriers显示文摘 | Samir EL A Samira L Imre M | 2013 | Adv Drug Deliv Rev2013，65，3： | 1 |
| 6 | Antibiotic resistance in Gram-negative bacteria isolated from fanned catWsh 显示文摘 | SAMIRA S HOANG N K LE THANH H J L | 2007 | Food Control2007，18，： | 1 |
| 7 | The shape and size distribution of crystalline nanoparticles prepared by acid hydrolysis of native cellulose显示文摘 | Samira E H Yoshiharu N Putaux J L | 2008 | Biomacromolecules2008，9，： | 1 |
| 8 | Occurrence and detection of extended-spectrum-lactamases in Klebsiella isolates in Hilla, Iraq显示文摘 | ALAA H CHARRAKH A L SAMIRA Y | 2011 | African J Biotechnol2011，10，4： | 1 |
| 9 | Purification, molecular cloning, and cell specific gene expression of the alkaloid-accu mulation associated protein CrPS in Catharanthus roseus 显示文摘 | Diane L Lazhar O Samira M | 2005 | Journal Experimental Botany2005，56，414： | 1 |
| 10 | The shape and size distribution of crystalline nanopartieles prepared by acid Hydrolysis of native cellulose显示文摘 | Samira E H Yoshiharu N Jean L P | 2008 | Biomacromolecules2008，9，1： | 1 |
| 11 | High-temperature refining of metallurgical-grade silicon:A review显示文摘 | MURRAY D J LEILI T K MARK L SAMIRA S MANSOOR B | 2012 | JOM2012，64，8： | 1 |
| 12 | MULTIPLE SOLUTIONS TO SINGULAR BVPS WITH VARIABLE COEFFICIENT ON THE HALF-LINE显示文摘This paper is concerned with a singular second-order nonlinear boundary value problem with a time depending on derivative operator and posed on the positive half-line. The nonlinearity is derivative-dependent, which has singularities at t=0 and/or x=0, and may change sign. The method of the upper and lower solutions on unbounded domains combined with the topological degree theory are employed to prove the existence and multiplicity of solutions. | Sma?l Djebali Samira Zahar | 2013 | Annals of Differential Equations2013，29，3： | 0 |
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