| 1 | Predictive factors for survival and score application in liver retransplantation for hepatitis C recurrence显示文摘AIM: To identify risk factors associated with survival in patients retransplanted for hepatitis C virus(HCV) recurrence and to apply a survival score to this population.METHODS: We retrospectively identified 108 patients retransplanted for HCV recurrence in eight European liver transplantation centers(seven in France, one in Spain). Data collection comprised clinical and laboratory variables, including virological and antiviral treatment data. We then analyzed the factors associated with survival in this population. A recently published score that predicts survival in retransplantation in patients with hepatitis C was applied. Because there are currently no uniform recommendations regarding selection of the best candidates for retransplantation in this setting, we also described the clinical characteristics of 164 patients not retransplanted, with F3, F4, or fibrosing cholestatic hepatitis(FCH) post-first graft presenting with hepatic decompensation. RESULTS: Overall retransplantation patient survival rates were 55%, 47%, and 43% at 3, 5, and 10 years, respectively. Patients who were retransplanted for advanced cirrhosis had survival rates of 59%, 52%, and 49% at 3, 5, and 10 years, while those retransplanted for FCH had survival rates of 34%, 29%, and 11%, respectively. Under multivariate analysis, and adjusting for the center effect and the occurrence of FCH, factors associated with better survival after retransplantation were: negative HCV viremia before retransplantation, antiviral therapy after retransplantation, non-genotype 1, a Model for End-stage Liver Disease(MELD) score < 25 when replaced on the waiting list, and a retransplantation donor age < 60 years. Although the numbers were small, in the context of the new antivirals era, we showed that outcomes in patientswho underwent retransplantation with undetectable HCV viremia did not depend on donor age and MELD score. The Andrés score was applied to 102 patients for whom all score variables were available, producing a mean score of 43.4(SD = 6.6). Survival rates after the date of the first decompensation post-first liver transplantation(LT1) in the liver retransplantation(re LT) group(94 patients decompensated) at 3, 5, and 10 years were 62%, 59%, and 51%, respectively, among 78 retransplanted individuals with advanced cirrhosis, and 42%, 32%, and 16% among 16 retransplanted individuals with FCH. In the non-re LT group with hepatic decompensation, survival rates were 27%, 18%, and 9% at 3, 5, and 10 years, respectively(P < 0.0001). Compared with non-retransplanted patients, retransplanted patients were younger at LT1(mean age 48 ± 8 years compared to 53 ± 9 years in the no re LT group, P < 0.0001), less likely to have human immunodeficiency virus(HIV) co-infection(4% vs 14% among no re LT patients, P = 0.005), more likely to have received corticosteroid bolus therapy after LT1(25% in re LT vs 12% in the no re LT group, P = 0.01), and more likely to have presented with sustained virological response(SVR) after the first transplantation(20% in the re LT group vs 7% in the no re LT group, P = 0.028).CONCLUSION: Antiviral therapy before and after retransplantation had a substantial impact on survival in the context of retransplantation for HCV recurrence, and with the new direct-acting antivirals now available, outcomes should be even better in the future. | Alice Tung Wan Song Rodolphe Sobesky Carmen Vinaixa Jérome Dumortier Sylvie Radenne Francois Durand Yvon Calmus Géraldine Rousseau Marianne Latournerie Cyrille Feray Valérie Delvart Bruno Roche Stéphanie Haim-Boukobza Anne-Marie Roque-Afonso Denis Castaing Edson Abdala Luiz Augusto Carneiro D’Albuquerque Jean-Charles Duclos-Vallée Marina Berenguer Didier Samuel | 2016 | World Journal of Gastroenterology2016，22，18： | 1 |
| 3 | Chiral supramolecular gold-cysteine nanoparticles: Chiroptical and nonlinear optical properties显示文摘Cysteine is a sulfur-containing amino acid that easily coordinates to soft metal ions and grafts to noble metal surfaces. We report a simple synthetic approach for the production of chiral gold-cysteine polymeric nanoparticles soluble in water. Conjugation of cysteine with gold in a polymeric way, leading to ~50 nm diameter nanoparticles, resulted in the generation of new characteristic circular dichroism(CD) signals in the region of 250–400 nm, whereas no CD signal changes were found with cysteine alone. We also investigate their nonlinear optical properties after two-photon absorption. Two-photon emission spectra and first hyperpolarizabilities, as obtained by the hyper-Rayleigh scattering technique, of these particles are presented. | Isabelle Russier-Antoine Franck Bertorelle Alexander Kulesza Antonin Soleilhac Amina Bensalah-Ledoux Stephan Guy Philippe Dugourd Pierre- Francois Brevet Rodolphe Antoine | 2016 | Progress in Natural Science:Materials International2016，26，5： | 0 |
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