模擬病理狀態(tài)下氣道上皮組織對氣道平滑肌增生的影響研究
[Abstract]:Asthma (Astma), as a chronic respiratory disease, is becoming a serious threat to human health. Unfortunately, the scientific community has not yet fully recognized the etiology and development of asthma, and its pathological mechanism has always been an important issue in medicine. The airway is gas in and out of the lungs Channel: Inflammation of the respiratory tract of a person with asthma, which causes the respiratory tract to become swollen and swollen. Sensitive. They tend to react to certain inhaled substances Severe. When asthma occurs, the muscles around the airway tighten, the airway is deflated, causing insufficient gas flowing into the lungs, and even swelling will further deteriorate, causing the airway More narrow. The proliferation of airway smooth muscle is one of the main symptoms of asthma. It is reported that myocyte proliferation is much higher in asthmatic individuals. Non-asthmatic individuals. Although corticosteroids inhibit myocyte proliferation in normal airways by reducing the expression of cyclin D1 and phosphorylation of retinoblastoma proteins, in asthma individuals No effect. Despite so many studies, there are many questions about airway smooth muscle proliferation The upper airway of the airway plays a vital role in the defense of the respiratory tract system, which prevents the damage to the airway epithelium through its intercepting system, thus protecting the respiratory tract and the epithelium (especially in the sputum). When the epithelial cells of the group), and the epithelial exfoliation in the bronchi are the obvious phenomena of epithelial damage, in the next epithelial tissues, the airway epithelium will secrete signaling factors that promote cell growth and migration, and many of these factors can stimulate the epithelial cells. Airway smooth muscle hyperplasia, airway smooth muscle or airway epithelium have significant pathological characteristics in the occurrence of asthma, but there is signal communication between them. There is no complete theoretical explanation. Now researchers have done a lot of research on airway smooth muscle, but on the airway smooth muscle is smooth In vitro, we constructed airway epithelial cell (AEC) injury model with poly L arginine (PLA) in vitro and co-cultured with normal smooth muscle cells (ASMC) (acidophilic in the course of asthma). Grangranulocytes are the main effector cells, eosinophil cationic proteins (E CP) is its main effect component. As an ECP analog, PLA can be used in vitro The subject is also co-cultured in order to simulate the condition of the airway epithelium in the event of asthma more realistically. In order to explore the proliferation of ASMC in co-culture system, the proliferation of ASMC in co-culture system was detected. In order to build an in vitro model: this topic is to build an in vitro model: AEC and ASMC were collected and cultured, and morphology and immunofluorescence were used The results showed that a large amount of primary ASMC was obtained by tissue block attachment, and pancreatic protein was used. A large number of AEC was obtained by the enzyme-cold digestion method. The effects of PLA on the activity of airway epithelial cells in rats were studied: a total of 10 concentrations of PLA with a concentration of 0-50. m u.M (one interval gradient per 5. mu.M concentration) were set. Processing AEC, processing time Cell counts were then performed with trypan blue. The results showed that, compared with the control group, even small concentrations of PLA (5. mu.M) were fine for the airway epithelium. There were also significant toxic effects on the cells (P0.01). However, when the concentration of PLA was greater than 20. m u.M, the change of toxicity was no longer significant (PLA concentration). P0. 05) between the components at 20 & mu; M. AEC damage model construction: AEC high concentration (50. mu.M) PLA for a short time Histology (10 minutes) to construct an airway epithelial cell damage model. Design of a co-culture device: To be able to treat the airway during co-culture The skin cells were pressed separately, and we improved the pressure device for co-culture. Finally, we're setting up The device provided by the invention can provide the stable pressure required by us (14KPa), and five experimental groups are arranged in the experiment: the ASMC is independently cultured as a control group (A), the ASMC is co-cultured with the AEC (B), the ASMC is co-cultured with the damaged AEC (C), ASMC co-culture with undamaged AEC and external pressure applied (D) ASMC was co-cultured with the damaged AEC and applied external pressure (E) under co-culture conditions for ASMC value-added detection: the growth OD value of an ASMC was measured by MTT every 12h, and 5 time points were taken, not only 12h, The OD values of each group of cells were measured at 24h, 36h, 48h and 60h, respectively. The correlation analysis results showed that when 60h, the p between the group A and the group A and the group B was 0. 0. 1. The OD of group E was the largest, and the growth rate of ASMC in group E was significantly higher than that in other groups. It is shown that external pressure and AEC damage have an independent effect on the value-added value of ASMC. We conclude that in vitro research
【學(xué)位授予單位】:重慶大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2012
【分類號】:R562.25
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