Résumé
The expression levels of heat shock protein 70 (HSP70) from peripheral lymphocytes of the patients with allergic rhinitis (AR) and the clinical implication were investigated. In the morning, 3 ml of fasting venous blood was taken out. The lymphocytes were isolated by using Ficoll-Hypaque and the expression of HSP70 in the lymphocytes was detected by using Western blot. In the AR patients the HSP70 level (41.49 +/- 15.77 integrated optical density, IOD) were significantly higher than that in the control group (23.89 +/- 10.13 IOD, P < 0.05). Western blot demonstrated that HSP70 bands in AR patients were more intensive than those in the control group. It was concluded that the elevated HSP70 level in peripheral lymphocytes of the AR patients might contribute to the development of AR.
Sujets)
Régulation de l'expression des gènes , Protéines du choc thermique HSP70/biosynthèse , Protéines du choc thermique HSP70/sang , Protéines du choc thermique HSP70/génétique , Lymphocytes/métabolisme , Rhinite allergique saisonnière/sangRésumé
The expression levels of heat shock protein 70 (HSP70) from peripheral lymphocytes of the patients with allergic rhinitis (AR) and the clinical implication were investigated. In the morning, 3 ml of fasting venous blood was taken out. The lymphocytes were isolated by using Ficoll-Hypaque and the expression of HSP70 in the lymphocytes was detected by using Western blot. In the AR patients the HSP70 level (41.49 +/- 15.77 integrated optical density, IOD) were significantly higher than that in the control group (23.89 +/- 10.13 IOD, P < 0.05). Western blot demonstrated that HSP70 bands in AR patients were more intensive than those in the control group. It was concluded that the elevated HSP70 level in peripheral lymphocytes of the AR patients might contribute to the development of AR.
Sujets)
Adulte , Femelle , Humains , Mâle , Régulation de l'expression des gènes , Protéines du choc thermique HSP70 , Sang , Génétique , Lymphocytes , Métabolisme , Rhinite allergique saisonnière , SangRésumé
<p><b>OBJECTIVE</b>To analyze the difference between basal and heat-inducible levels of lymphocyte heat shock protein 71 (HSP71) expression in soldiers from Beijing, Zhengzhou and Guangzhou.</p><p><b>METHODS</b>Flow cytometry and Comet assay were used to detect the level of HSP71 and DNA damage respectively.</p><p><b>RESULTS</b>Comet assay showed that there was no significant DNA damage before and after heat stress at 41 degrees C for 1 h, and also no difference found among the 3 climatic zones(P > 0.05). HSP71 of all soldiers in the 3 zones elevated after stress (P < 0.05). The basal and heat-inducible levels of HSP71 in Beijing soldiers(845.87 +/- 135.60 and 1254. 47 +/- 239.05 mean fluorescence intensity respectively) were higher than those in Guangzhou soldiers(702.73 +/- 184.70 and 861.72 +/- 225.12 mean fluorescence intensity respectively) (P < 0.05).</p><p><b>CONCLUSION</b>The differences of lymphocyte HSP71 expression before and after heat stress among the soldiers from Beijing, Zhengzhou and Guangzhou suggest that basal and heat-inducible levels of lymphocyte HSP71 expression may be considered as a valuable index to evaluate heat tolerance of soldiers in different climatic zones.</p>
Sujets)
Humains , Climat , Test des comètes , Altération de l'ADN , Cytométrie en flux , Troubles dus à la chaleur , Métabolisme , Protéines du choc thermique , Lymphocytes , Métabolisme , Personnel militaire , PoliceRésumé
<p><b>OBJECTIVE</b>To study the toxicological effects of benzo[a]pyrene(BaP) on mammalian animal's nerve tissue.</p><p><b>METHODS</b>50 Kunming mice were divided into 5 groups at random, the exposed groups(3 dose level groups), the vehicle control group and standard control group. Every group got 10 mice. The exposed groups were treated by intraperitoneal injection with BaP dissolved in vegetable oil at 7.8, 3.2 and 1.3 mg/kg respectively, 4 times/week, for 10 weeks, the vehicle control group were given vegetable oil and the standard control group were not given any treatment. All the mice were anesthetized with 0.02 mol/L pentobarbital and infused with 1.33 mol/L paraformaldehyde dissolved in PBS through heart after 10 weeks. Then the brain, spinal cord and sciatic nerve were removed. Slices of these tissues were made and morphological changes were observed by optical microscope and electron-microscope. Cell appoptosis was examined by TUNEL(TdT-mediated x-dUTP nick end labeling) method.</p><p><b>RESULTS</b>Morphological observations showed tissue injury in BaP exposed groups. There were focal necrosis areas found in the high-dose group. The cell apoptosis rates in 3.2 and 1.3 mg/kg groups were 90.02%-94.22% and 62.45%-77.54% respectively, significantly higher than those of vehicle control group and standard control group(4.60%-5.57%).</p><p><b>CONCLUSION</b>BaP is neurotoxic. It could damage the nerve tissue as well as induce DNA breaks and cell apoptosis.</p>