ABSTRACT
<p><b>AIM</b>To investigate the effects of glutamine on the colonic mucosa of mice subjected to colitis gravis.</p><p><b>METHODS</b>64 Kunming mice were divided randomly into 4 groups (n=16): healthy group: animals not subjected to colitis; model group: animals subjected to colitis gravis but without glutamine supplementation; low-Gln group: animals subjected to colitis gravis and with low dose of glutamine supplementation; high-Gln group: animals subjected to colitis gravis and with high dose of glutamine supplementation. Animals belonging to the control, the low-Gln, the high-Gin groups were subjected to coloclysis by HAC to be colitis gravis animals. When the models were established, the healthy and the control groups were given some isotonic Na chloride by intragastric administration. The low-Gln group and the high-Gln group were given the same volume but different concentration of glutamine(low-Gln group--2 mmol x Kg(-1) bw, high-Gln group--2 mmol x Kg(-1) bw) for 7 days. Then the mice were sacrificed, the pathohistological changes of the colon were observed, besides, the content of endotoxin in the blood serum, the level of counteracting oxidation and the activities of MPO of the colon tissue were determined.</p><p><b>RESULTS</b>The glutamine lessened the pathological injures in the colon and relieved the step up of the content of endotoxin in the blood serum , the step down level of counteracting oxidation and the step up activity of MPO in the colon tissue, which were caused by colitis gravis.</p><p><b>CONCLUSION</b>The glutamine can protect the colon of mice subjected to colitis gravis.</p>
Subject(s)
Animals , Female , Male , Mice , Acetic Acid , Colitis, Ulcerative , Drug Therapy , Pathology , Colon , Pathology , Glutamine , Pharmacology , Therapeutic Uses , Random AllocationABSTRACT
<p><b>AIM</b>To explore the influence of cold strss on DNA oxidative damage of lung in chicken.</p><p><b>METHODS</b>Took 15-day-old healthy chicks as the experimental object, carried on the cold stress (12 +/- 1 degrees C) to process. Detected the change of the MDA content, SOD and GSH-Px activity of the lung, and performed KCl-SDS precipitation method and fluorescence detection method to identify the influence of cold strss on DNA-protein crosslinks (DPC) and DNA-DNA crosslinks (DDC) of lung cell in different time.</p><p><b>RESULTS</b>The results were as follow: with the time lapsing during acute cold stress, MDA content gradually increased, the SOD and GSH-Px activity of the lung increased compared with their control group at each stress time point, and the lung cell DPC and DDC coefficient were all gradually increased with the time lapsing.</p><p><b>CONCLUSION</b>Cold stress could bring about destruction in the lung tissue oxidation-antioxidant balance, and causes the oxidation damage of DNA.</p>
Subject(s)
Animals , Male , Animals, Newborn , Chickens , Cold Temperature , DNA Damage , Lung , Pathology , Oxidative Stress , Physiology , Stress, Physiological , PhysiologyABSTRACT
The transgenic wheat of improved resistance to the storage pest was production. We have introduced the cowpea trypsin inhibitor gene (CpTI) into cultured embryonic callus cells of immature embryos of wheat elite line by Agrobacterium-mediated method. Independent plantlets were obtained from the kanamycin-resistant calli after screening. PCR and real time PCR analysis, PCR-Southern and Southern blot hybridization indicated that there were 3 transgenic plants viz. transformed- I, II and III (T- I, T-II and T-III). The transformation frequencies were obviously affected by Agrobacterium concentration, the infection duration and transformation treatment. The segregations of CpTI in the transgenic wheat progenies were not easily to be elucidated, and some transgenic wheat lines (T- I and T-III) showed Mendelian segregations. The determinations of insect resistance to the stored grain insect of wheat viz. the grain moth (Sitotroga cerealella Olivier) indicated that the 3 transgenic wheat progeny seeds moth-resistance was improved significantly. The seed moth-eaten ratio of T- I, T-II, T-III and nontransformed control was 19.8%, 21.9%, 32.9% and 58.3% respectively. 3 transgenic wheat T1 PCR-positive plants revealed that the 3 transgenic lines had excellent agronomic traits. They supplied good germplasm resource of insect-resistance for wheat genetic improvement.