硫化氫對(duì)蝮蛇毒致大鼠急性肺損傷氧化應(yīng)激的調(diào)節(jié)作用
[Abstract]:Purpose: The effect of H _ 2S/ CSE on oxidative stress in rats with acute lung injury was studied. For use. Methods:1. Group:36 male clean-grade SD rats were divided into 6 groups by a complete random design,6 rats in each group, respectively: the normal saline control group (N group), the control group (S group) and the low-dose NaHS group (group S). (S + L group); NaHS group (group S + M) in the high-dose NHS group (S + M group); the high-dose NHS group (S + H group); the pyotoxin + PPG group (S + PPG group).2. Method: The volume of physiological saline such as intraperitoneal injection of N groups and the rest of the group were divided into two groups. After 3 h, the volume of NS + L, S + M, S + H group and S + PPG group were injected intraperitoneally and the doses of 0.78 mg/ kg, 1.56 mg/ kg and 3.12 mg/ kg of NaHS and 30 mg/ k were respectively injected into the abdominal cavity. G-dose of PPG. After 6 h, each group of experimental animals was sacrificed, cardiac blood was collected and the serum was separated and the corresponding samples were taken. The lung tissue was retained as a specimen. The lung tissue HE staining was used to observe the pathological changes in parallel with the pathological changes, the wet/ dry weight ratio of the lung was measured, the plasma H _ 2S content was detected by the deproteinization method, the CSE activity of the lung tissue was determined by the methylene blue method, and the lung tissue homogenate superoxide dismutase was determined by the WST-1 method. The activity of glutathione peroxidase (GSH-Px) and the enzyme-linked immunosorbent assay (ELISA) were used to determine the activity of glutathione peroxidase (GSH-Px) in the lung tissue and the enzyme-linked immunosorbent assay (ELISA) for the determination of 8-isoprostane (8-iso-P) in the lung. GF2 1. Results:1. The change of the wet/ dry weight ratio (W/ D) of the lung tissue: compared with the N group, the S group W/ In comparison with S group, there was no difference in W/ D value of S + L group (P0.05), and W/ D of S + M and S + H group decreased significantly (P0.01); and S + PPG group W/ D. The pathological changes of the pulmonary tissue and the pathological score of the lung injury (IQA) under the light microscope: compared with the normal lung tissue of the N group, the pulmonary alveolar structure of the S group was obviously disturbed, destroyed, the alveolar structure was incomplete, the alveolar edema was obvious, and a large amount of the lung The formation of hyaline membrane, the marked thickening of the interstitial lung, the large amount of red blood cells and the infiltration of the pulmonary alveoli and the alveoli in the lung can be seen in the lung, and I can see that the In comparison with S group, there was no significant improvement in lung injury in S + L group (P0.05), and the lung injury in S + M and S + H group was relieved. There was a small amount of red blood cell leakage, and there was a marked decrease in IQA (P0.01); the lung injury in the S + PPG group was significantly increased, the alveolar collapse and the lung were not obvious, and the multi-dose alveoli were formed in the extensive hyaline membrane formation. IQA increased (P0.05).3. The plasma H _ 2S content and the changes of the activity of CSE in the lung tissue: compared with the N group, the plasma H _ 2S content in the S group and the lung tissue CS The activity of plasma H _ 2S and CSE in the S + L group was significantly higher than that of the S group (P <0.01). The plasma H _ 2S content in the S + group and the activity of CSE in the lung tissue were significantly increased (P <0.01), and the plasma H _ 2S content in the S + PPG group and the activity of the CSE in the lung tissue were decreased. (P <0.01 or P <0.05).4. SOD and GSH-Px activity in the lung tissue homogenate: compared with the N group, the SOD and GS of the lung tissue of the S group were homogenate. The activity of SOD and GSH-Px in the lung tissue of S + L group was significantly higher than that in S group (P0.05). The changes of the content of 8-iso-prostaglandin (8-iso-PGF2) in the lung tissue homogenate: compared with the N group, the S-group lung tissue 8-iso Compared with S group, there was no difference in the content of 8-iso-PGF2 in the lung of S + L group (P0.05), and the content of the 8-iso-PGF2 in the S + M, S + H group was significantly decreased (P0.01); and the lung tissue of the S + PPG group was 8-i. so- Conclusion:1. The level of SOD and GSH-Px in rats exposed to H _ 2S and the level of GSH-Px increased, and the level of 8-isoPGF2a decreased and the lung injury was reduced. A decrease in the level of 8-isoPGF2a and an increase in lung injury.
【學(xué)位授予單位】:南華大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2013
【分類(lèi)號(hào)】:R563
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