(C) 2013 Published by Elsevier Ltd.”
“Percutaneous coronary intervention (PCI), especially LDK378 cost coronary stent implantation, has been shown to be an effective treatment for coronary artery disease. However, in-stent restenosis is one of the longstanding unsolvable problems following PCI. Although stents implanted
inside narrowed vessels recover normal flux of blood flows, they instantaneously change the wall shear stress (WSS) distribution on the vessel surface. Improper stent implantation positions bring high possibilities of restenosis as it enlarges the low WSS regions and subsequently stimulates more epithelial cell outgrowth on vessel walls. To optimize the stent position for lowering the risk of restenosis, we successfully established a digital three-dimensional (3-D) model based on a real clinical coronary artery and analysed the optimal stenting strategies by computational simulation. Via microfabrication and 3-D printing technology, the digital model was also converted into in vitro microfluidic models
with 3-D micro channels. Simultaneously, physicians placed real stents inside them; i.e., they performed “virtual surgeries”. The hydrodynamic experimental results showed that the microfluidic models highly inosculated the simulations. Therefore, our study not only demonstrated that the half-cross learn more stenting strategy could maximally reduce restenosis risks but also indicated that 3-D printing combined with clinical image reconstruction is a promising method for future angiocardiopathy research.”
“We have previously described a mechanism Dinaciclib research buy through which the high-mobility group A1 (HMGA1) proteins inhibit p53-mediated apoptosis by delocalizing the p53 proapoptotic activator homeodomain-interacting protein kinase 2 from the nucleus to the cytoplasm. By this mechanism, HMGA1 modulates the transcription of p53 target genes such as Mdm2, p21(waf1), and Bax, inhibiting apoptosis. Here, we report that HMGA1 antagonizes the p53-mediated transcriptional repression
of another apoptosis-related gene, Bcl-2, suggesting a novel mechanism by which HMGA1 counteracts apoptosis. Moreover, HMGA1 overexpression promotes the reduction of Brn-3a binding to the Bcl-2 promoter, thereby blocking the Brn-3a corepressor function on Bcl-2 expression following p53 activation. Consistently, a significant direct correlation between HMGA1 and Bcl-2 overexpression has been observed in human breast carcinomas harboring wild-type p53. Therefore, this study suggests a novel mechanism, based on Bcl-2 induction, by which HMGA1 overexpression contributes to the escape from apoptosis leading to neoplastic transformation. Cancer Res; 70(13); 5379-88. (C) 2010 AACR.”
“Two lathyrane diterpenes (1-2) together with previous ones (3-6) were isolated from Euphorbia lathyris.