RETRACTED: Correlations of SELE and SELP genetic polymorphisms with myocardial infarction risk: a meta-analysis and meta-regression (Retracted article. See vol. 42, pg. 1461, 2015)
MOLECULAR BIOLOGY REPORTS
Authors: Zhao, Yu-Juan; Yang, Xia; Ren, Li; Cai, An-Sheng; Zhang, Yan-Fen
Abstract
This meta-analysis was undertaken in an attempt to understand the relationships of functional polymorphisms in the SELE and SELP genes to myocardial infarction (MI) risk. The PubMed, CISCOM, CINAHL, Web of Science, Google Scholar, EBSCO, Cochrane Library, and CBM databases were searched for relevant articles published before March 1st, 2013 without any language restrictions. Meta-analysis was conducted using the STATA 12.0 software. Crude odds ratios with 95 % confidence intervals were calculated. The effect of SELE and SELP genetic polymorphisms on the pathogenesis of MI was investigated in this meta-analysis with a total of ten case-control studies, including 2,696 MI patients and 4,724 healthy subjects. Eight single nucleotide polymorphisms were assessed, including polymorphisms 98G/T, 128S/R and 561A/C in the SELE gene, and polymorphisms 715T/P, 599V/L, 290S/N, 562N/D and 2123G/C in the SELP gene. The results of our meta-analysis suggested that SELE genetic polymorphisms might be correlated with an increased risk of MI, especially for 128S/R and 561A/C polymorphisms. A subgroup analysis by ethnicity was conducted to investigate its effects on susceptibility to MI. The results revealed positive significant correlations between SELE genetic polymorphisms and the risk of MI among Asians, but not among Caucasians (all P > 0.05). Nevertheless, no significantly correlations were found between SELP genetic polymorphisms and MI risk (all P > 0.05). In the subgroup analysis by ethnicity, we also did not observe significant associations between SELP genetic polymorphisms and MI risks among both Asians and Caucasians (all P > 0.05). The current meta-analysis suggests that SELE genetic polymorphisms may contribute to the development of MI, especially for the 128S/R and 561A/C polymorphisms among Asians. However, SELP genetic polymorphisms may not be important risk factors in MI.
Silk-elastinlike protein polymers improve the efficacy of adenovirus thymidine kinase enzyme prodrug therapy of head and neck tumors
JOURNAL OF GENE MEDICINE
Authors: Greish, Khaled; Frandsen, Jordan; Scharff, Stephanie; Gustafson, Joshua; Cappello, Joseph; Li, Daqing; O'Malley, Bert W., Jr.; Ghandehari, Hamidreza
Abstract
Background Adenoviral-directed enzyme prodrug therapy is a promising approach for head and neck cancer gene therapy. The challenges faced by this approach, however, comprise transient gene expression and dissemination of viruses to distant organs. Methods We used recombinant silk-elastinlike protein polymer (SELP) matrices for intratumoral delivery of adenoviruses containing both thymidine kinase-1 and luciferase genes in a nude mouse model of JHU-022 head and neck tumor. Hydrogels made from two SELP analogues (47K and 815K), with similar silk to elastinlike block ratios but different block lengths, were studied for intratumoral viral delivery. Tumor-bearing mice were followed up for tumor progression and luciferase gene expression concomitantly for 5 weeks. Polymer safety was evaluated through body weight change, blood count, and liver and kidney functions, in addition to gross and microscopic histological examination. Results SELP-815K analogues efficiently controlled the duration and extent of transfection in tumors for up to 5 weeks with no detectable spread to the liver. An approximately five-fold greater reduction in tumor volume was obtained with matrix-mediated delivery compared to intra-tumoral injection of adenoviruses in saline. SELP matrix proved safe in all injected mice compared to the control group. Conclusions The SELP-controlled gene delivery approach could potentially improve the anticancer activity of virus-mediated gene therapy at the same time as limiting viral spread to normal organs. Copyright (C) 2010 John Wiley & Sons, Ltd.