Karger AG, Basel”
“Endoplasmic reticulum stress is a central feature of obesity, insulin resistance, and type 2 diabetes. A polymorphism of the XBP1 gene (-116C/G), a transcription
factor that modulates the endoplasmic reticulum stress response, Causes an impairment of its positive feedback system. The authors examined a role of the polymorphism in the development of obesity. The polymorphism was investigated in clinically obese children and compared with controls. Significant difference of genotype distribution was observed, which suggested that the -116C/G genotype may be a risk factor for at least pediatric obesity.”
“Purpose: BMS-345541 price The objective of the present study was to provide evidence for the hypothesis of fibroblasts and the desmoplastic reaction, respectively, to impact the formation and maturation of the vascular Selleck TGF-beta inhibitor network in human colon tumours via a retrospective in situ study. An in vivo xenograft model was evaluated to verify its potential for fibroblast-related functional studies.
and methods: In situ: Fiftytwo G2/G3 colon tumours were histomorphologically categorised into low (<50%), medium (50-75%) and high (>75%) grade desmoplasia based on hematoxylin/eosin and Elastica van Gieson stained paraffin sections. Low and high grade desmoplastic tumours were identified and stained for endothelial and pericyte markers to morphometrically analyse microvessel count (MVC), vascular surface area (VSA) and vascular maturation status. In vivo: One out of three established subcutaneous xenograft model in NMRI (nu/nu) mice was adapted to monitor the
impact of primary human fibroblasts on xenograft formation and morphology.
Results: Vascular structures in human colon tumours are predominantly located in the fibroblastic stromal regions. Highly desmoplastic tumours, however, have significantly lower MVC and VSA values Selleck GDC-0068 at the invasion front with signs for augmented vascular maturation as compared with low grade desmoplastic colon cancers. Our in vivo approach verified that only high proportions of co-injected normal fibroblasts accelerate xenograft formation of HCT-116 colon cancer cells.
Conclusions: The in situ data clearly support the hypothesis of fibroblasts to contribute to vascular maturation phenomena in colon cancers. The in vivo design of only 500 tumour cells co-injected with normal fibroblast is feasible, results in 100% engraftment and is the basis for further developments.”
“Objectives: It remains controversial whether we can apply similar principles in the management of upper urinary tract urothelial carcinoma (UUT-UC) based on the behavior of bladder urothelial carcinoma (B-UC). We sought to assess whether UUT-UC and B-UC have similar biology and performed a stage-by-stage comparative analysis of outcome between the 2 groups. Methods: A retrospective review was performed on patients who underwent nephroureterectomy for UUT-UC and radical cystectomy for B-UC from 1991 to 2006.