Malonaldehyde, NO, and NOS in pancreas homogenate were significantly increased, and superoxide dismutase
activity was decreased. Conclusion. These data suggested that there were morphological damage of pancreas and disturbance of pancreatic secretion function in rabbits with ARF. Free radicals-injury and NO excessive release may explain the observed dysfunction.”
“Purpose: To investigate the phosphorylated histone H2A isoform X (gamma H2AX) foci kinetics as an indicator for the development of acute normal tissue complications during Intensity-Modulated Radiotherapy (IMRT) for head and neck cancer (HNC) patients.
Materials and methods: Microscopic scoring of the gamma H2AX foci was used to evaluate the DNA-double-strand-break repair capacity in HIF cancer from Ataxia-Telangiectasia (A-T) patients derived lymphoblastoid cell lines (LCL) and T-lymphocytes isolated from 31 IMRT treated HNC patients. Cells were irradiated in vitro with 0.5 Gy given at high-dose-rate (HDR) and examined at several times up to 24 h after irradiation. The patients were subdivided in three groups showing mild, moderate and severe acute normal tissue complications based on their Common Toxicity Criteria grades Cyclopamine mw for dysphagia, mucositis and dermatitis during the radiotherapy
Results: For the ATM (Ataxia-Telangiectasia-Mutated) defective LCL, a lower number of radiation-induced foci and a somewhat less efficient repair capacity was observed. No correlation was found between the gamma H2AX foci kinetics pattern and the risk for acute normal tissue complications among the three patient subgroups.
Conclusions: Scoring of gamma H2AX foci after in vitro irradiation of isolated T-lymphocytes of HNC patients cannot be applied to predict for the development Tideglusib price of acute normal tissue complications.”
“Soluble poly[styrene-co-(acrylic acid)] (PSA) modified by magnesium compounds was used to support TiCl4. For ethylene polymerization, four catalysts were synthesized, namely PSA/TiCl4, PSA/MgCl2/TiCl4, PSA/(n-Bu)MgCl/TiCl4, and PSA/(n-Bu)(2)Mg/TiCl4.
The catalysts were characterized by a set of complementary techniques including X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, and element analysis. Synthesis mechanisms of polymer-supported TiCl4 catalysts were proposed according to their chemical environments and physical structures. The binding energy of Ti 2p in PSA/TiCl4 was extremely low as TiCl4 attracted excessive electrons from -COOH groups. Furthermore, the chain structure of PSA was destroyed because of intensive reactions taking place in PSA/TiCl4. With addition of (n-Bu) MgCl or (n-Bu)(2)Mg, -COOH became -COOMg- which then reacted with TiCl4 in synthesis of PSA/(n-Bu) MgCl/TiCl4 and PSA/(n-Bu)(2)Mg/TiCl4.