HO-1誘導(dǎo)靜脈內(nèi)皮細(xì)胞VEGF、SDF-1表達(dá)促進(jìn)DVT機(jī)化再通的研究
[Abstract]:[Objective]1. to construct the DVT repass model by isoflurane anesthesia and inferior vena cava stenosis method; use the heme oxygenase -1 agonist (CoPPIX) and inhibitor (SnPPIX) to intervene the dissolution and repassage process of DVT in C57 mice, and observe the mortality, thrombus rate, the length of inferior vena cava thrombus, wet weight and pathological section of the mice DVT model in each group. The variation of.2. in the inferior vena cava and thrombus in C57 mice was detected by.2., and the expression of VEGF and SDF-1 were detected. The effect and relationship of HO-1, VEGF and SDF-1 in the middle and late stages of DVT dissolution. [materials and methods] Experiment 1: the inferior vena cava stenosis method was used to construct DVT model of C57 mice and observe HO-1 agonists and inhibitors. 1. experimental group and DVT model were constructed: 200 C57 mice, weight 25-30g, female. According to the principle of random grouping, A group (blank control group, n=20), group B (normal DVT group, n=60), C group (CoPPIX intervention group, n=60) group and D group The same amount of physiological saline. After 24 hours of administration, B, C, D used isoflurane anesthesia combined with the inferior vena cava stenosis method to construct DVT model.2. material: after 4,7,10,13 days after the model, the cervical dislocations were taken to kill the mice, the vernier caliper was used to measure the thrombus length, and the inferior vena cava and its contents between the ligation point and the general iliac vein were taken down, each time was taken. 3 DVT specimens of mice in each group were randomly selected to be soaked with 4% polyformaldehyde and preserved for pathological examination. The remaining specimens were separated from the thrombus and venous wall, and the thrombus was weighed in the blood vessels. The venous wall and the contents of the contents were measured and analyzed by the.3. index of -80 degrees after the separation of the venous walls and contents: the mortality, the thrombus rate, the length of thrombus and the length of the thrombus were statistically analyzed. The change of wet weight. The statistical software used SPSS19.0, the measurement data used mean standard deviation (x + s); the same time point, 22 comparison between the groups using single factor analysis of variance, the LSD method (least square method), *p0.05 has statistical significance. Experiment two: HO-1, VEGF and SDF-1 mRNA in the DVT model of each group of mice at different time points. The 1.Trizol method was used to extract the total RNA in the inferior vena cava of each group of mice at different time points, and RT-PCR was used to reverse the reverse transcription of RNA in each group of mice to cDNA, and GAPDH as the internal reference. The Real-time PCR method was used to detect the changes of HO-1, VEGF and SDF-1 mRNA at different time points. Statistical analysis was used for statistical analysis. Mean standard deviation standard deviation (x + s); the same time point, 22 comparison between groups using single factor analysis of variance, LSD method (least square method), *p0.05 has statistical significance. [results] Experiment 1: inferior vena cava stenosis method to construct DVT model of C57 mice and observe the effect of HO-1 agonist and inhibitor on DVT mechanical repassage process of DVT: 1. anesthesia effect: experimental opening 3%-5% isoflurane was used for rapid induction of C57 mice. The 0.5%-1.0% concentration of isoflurane could maintain a satisfactory anesthetic effect. The induction of anesthesia satisfaction time and postoperative waking time were very fast, about 1-2min. The biggest adverse reaction in the anesthetic process was repression, but stopped anaesthetized or increased air flow. After the respiratory inhibition, the survival and mortality of.2. mice were quickly relieved: the mortality of A, D two groups was 0%, B, and the total mortality of C two groups was the total thrombus rate of each group of 1.67%3. models, respectively: the thrombus rate of the A group was 0%, B, C, and D group was 69.4%, 62.7%, and 83.3%4. in the different time points of each group were changed to the length of DVT length. Condition: the DVT length of each group was compared with the single factor analysis of variance. At fourth days, there was no significant difference in the length of DVT in group C and group D compared with B group, but there was a statistical difference between the C group and the D group in P=0.018, P0.05 and two groups; at seventh days, B, C, and there was no statistical difference between the groups of D, and tenth days. There was no significant difference in length compared with the normal group. There was a statistical difference between group C and group D, P=0.003, P0.05, and two groups. At thirteenth days, B, C, and D were statistically different among 22 groups, especially between the C group and the D group, P0.001. last, and the experiment compared the DVT length of each group from fourth to thirteenth days. The average decrease in the mean value of the B, C and D groups was 2.19mm, 2.74mm, 2.16mm, respectively, and the decrease ratio of each group was 37.6%, 49.5% and 31.9%.5. at different time points, respectively. The wet weight of DVT in each group of different time points of each group showed that the wet weight of DVT in each group was compared with one factor analysis of variance: fourth days, B, no obvious series between C groups. There were significant differences in P=0.719, but there were significant statistical differences between B, C group and D group, P value was 0.013 and 0.01, respectively less than 0.05. At seventh days, there was no statistical difference between group B and C, D group, and C group and D group, P=0.019, there was significant difference between the two groups. Tenth days, there was no significant statistics between the group and the group. There were significant differences between P=0.365, B, C group and D group, P values were 0.008 and 0.001 respectively. At thirteenth days, thirteenth days, B, C, D groups were all statistically significant differences, and P values were all 0.001. last. The experiment compared the average value of DVT wet weight in each group from fourth days to thirteenth days. The average decrease in wet weight of VT was 7.1mg, 8.14mg, 6.2mg. The reduction ratio of each group was 55.5%, 72% and 41.1%.6. in each group. The DVT pathological changes of each time point were found in group A: no DVT formed.B, C, D were taken from the postoperative 7,10,13 days respectively. With the passage of time after operation, the length of DVT gradually became shorter and the diameter was gradually thinning. The slice line HE staining was visible under the microscope: as time went on, the area of DVT in each group gradually increased, and there was a adhesion between the edge of the thrombus and the wall of the blood vessel. The DVT of group C was all computerized in the thirteenth day, and there was a vascular like in DVT. The structure was formed, and there was a large number of cracks in the visible area. Compared with the B group, the C group was obviously less inflammatory cells in DVT, and the area of DVT in the B group was more than half of the cross section area, while the DVT area of the D group was smaller and the area was only half of the DVT cross section. Experiment two: mice DVT at different time points. The mRNA expression changes of HO-1, VEGF and SDF-1 in the venous wall tissue of the model were compared with the A group as the blank control group, and the relative expression of HO-1, VEGF and SDF-1 mRNA in each group was detected. The results were statistically analyzed after statistical analysis, and there were significant differences in the expression of the 4,7,10,13 days after the formation of DVT. 22 Correspondingly, there were statistical differences in the expression of VEGF in day 4,7,10. P0.05, B at thirteenth days, there was no statistical difference between group C and P0.05, B, C and D, and there were significant statistical differences between P0.05, C and D group. In the process of intoxication, it is safe, effective, fast inducement, rapid recovery, no increase of animal model mortality,.2. inferior vena cava stenosis method can realize the construction of DVT repass model, 3.HO-1 has protective effect in the process of thrombosis, and HO-1 may promote DVT repass by inducing the high expression of VEGF and SDF-1 in the middle and late stages of DVT dissolution.
【學(xué)位授予單位】:昆明醫(yī)科大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:R543.6
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