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Andreassi MG Adlerstein D Carpeggiani C Shehi E Fantinato S Ghezzi E Botto N Coceani M L'abbate A 《Atherosclerosis》2012,223(2):409-415
AimsHigh-risk single nucleotide polymorphisms (SNPs) have been recently identified as risk factors for ischemic heart disease in large epidemiological and genome-wide association studies. However, their influence on prognosis remains uncertain. The aim of the study was to investigate the impact of previously identified SNPs and their joint effects in a genetic score (GS) on Major Adverse Cardiac Events (MACEs).Methods and resultsHigh-throughput genotyping for 48 high-risk SNPs was performed in 498 patients (432 males; 57.4 ± 8.3 years) who were followed-up for 6.9 ± 3.4 years. First MACE-coronary-related death, nonfatal myocardial infarction, or myocardial revascularization- was the endpoint taken into consideration. A GS was obtained by summing the number of significant high-risk alleles associated to MACEs.One-hundred and nineteen patients (24%) had a MACE. The hazard ratio (HR) for SNPs with a significant difference in cumulative survival were: APOC3 -482C > T (HR = 1.7, 95% CI 1.01–3.0), MTHFR (HR = 1.5, 95% CI 1.02–2.2), NADHPH oxidase- p22-PHOX C242T (HR = 1.9, 95% CI 1.2–2.8), PON-2 (HR = 0.2, 95% CI 0.1–0.8), and SELP (HR = 0.6, 95% CI 0.4–0.8). The resulting GS predicted a 25% risk for MACEs per risk allele (HR = 1.25, 95% CI 1.1–1.4, p = 0.001). The highest HR for MACEs was found in patients in the top tertile (HR = 3.0, 95% CI 1.4–6.7, p = 0.0005) of the GS compared with those in the bottom tertile.ConclusionOur findings show that high-risk SNPs may be used to create a useful GS that predicts MACEs in a secondary prevention setting, which in turn allows a better risk stratification. 相似文献
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De Nicola S Aghemo A Rumi MG Galmozzi E Valenti L Soffredini R De Francesco R Prati GM D'Ambrosio R Cheroni C Donato MF Colombo M 《Hepatology (Baltimore, Md.)》2012,55(2):336-342
Single nucleotide polymorphisms (SNPs) near the interleukin 28B (IL28B) region are the strongest baseline predictors of a sustained virologic response (SVR) to peg-interferon (PegIFN) and ribavirin (Rbv) in patients with hepatitis C virus (HCV) genotype 1 infection. Whether this holds true for HCV-4 patients too is unknown. The aim was to investigate the predictive power of the rs12979860 IL28B SNP for a response to Peg-IFN and Rbv in HCV-4 patients. All HCV-4 patients consecutively treated between September 2004 and June 2010 with PegIFN and Rbv at two liver centers at the Maggiore Hospital Milan (Italy) underwent TaqMan SNP Genotyping assays for testing rs12979860 genotype. Of 112 treated patients (98 males, 75 of Egyptian descent, 26 with cirrhosis) 103 were included in the final analysis; five discontinued treatment for nonvirologic reasons and four did not consent to genetic testing. Twenty-four (23%) were genotype CC, 65 (63%) CT, and 14 (14%) TT. Overall, 50 (49%) achieved an SVR: 21 (88%) CC patients versus 29 (37%) CT/TT (P < 0.0001). CC patients more often had a rapid virologic response (RVR) than CT/TT patients (12, 50% versus 23, 29%; P = 0.08), while also showing lower relapse rates (0% [0/21] versus 36% [16/45] P = 0.0013). In non-RVR patients, SVR rates were higher in CC than CT/TT patients (9 [75%] versus 13 [23%] P = 0.001). By logistic regression, the IL28B rs12979860 CC genotype was an independent predictor of SVR with an odds ratio of 8.0 (95% confidence interval 2.00-32.01; P = 0.003). CONCLUSION: The IL28B rs12979860 SNP may have an added value in the treatment algorithm of HCV-4 patients because it is the strongest predictor of an SVR to PegIFN/Rbv therapy. 相似文献
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Giorgio Zauli Claudio Celeghini Elisabetta Melloni Rebecca Voltan Manuele Ongari Mario Tiribelli Maria Grazia di Iasio Francesco Lanza Paola Secchiero 《Haematologica》2012,97(11):1722-1730
Background
Both the multi-kinase inhibitor sorafenib and the small molecule inhibitor of the MDM2/p53 interaction, nutlin-3, used alone, have shown promising anti-leukemic activity in acute myeloid leukemia cells. Thus, in this study we investigated the effect of the combination of sorafenib plus nutlin-3 in acute myeloid leukemia.Design and Methods
Primary acute myeloid leukemia blasts (n=13) and FLT3wild-type/p53wild-type (OCI-AML3), FLT3mutated/p53wild-type (MOLM), FLT3mutated/p53mutated (MV4-11), FLT3wild-type/p53deleted (HL60) or FLT3wild-type/p53mutated (NB4) acute myeloid cell lines were exposed to sorafenib, used alone or in association with nutlin-3 at a 1:1 ratio, in a range of clinically achievable concentrations (1-10 μM). Induction of apoptosis and autophagy was evaluated by transmission electron microscopy and by specific flow cytometry analyses. The levels of Mcl-1, p53 and Bak proteins were analyzed by western blotting. Knock-down of Bax and Bak gene expression was performed in transfection experiments with specific short interfering RNA.Results
The sorafenib+nutlin-3 drug combination exhibits synergistic cytotoxicity in primary acute myeloid leukemia blasts and in acute myeloid leukemia cell lines with maximal cytotoxicity in FLT3mutated MV4-11 and MOLM, followed by the FLT3wild-type OCI-AML3, HL60 and NB4 cell lines. The cytotoxic activity of sorafenib+nutlin-3 was characterized by an increase of both apoptosis and autophagy. Moreover, Bax and Bak showed prominent roles in mediating the decrease of cell viability in response to the drug combination in p53wild-type OCI-AML3 and p53deleted HL-60 cells, respectively, as demonstrated in transfection experiments performed with specific short interfering RNA.Conclusions
Our data demonstrate that acute myeloid leukemia cells show a variable but overall good susceptibility to the innovative therapeutic combination of sorafenib+nutlin-3, which differentially involves the pro-apoptotic Bcl-2 family members Bax and Bak in p53wild-type and p53deleted cells.Key words: sorafenib, nutlin-3, acute myeloid leukemia, p53, apoptosis, autophagy 相似文献79.