腮腺多形性腺瘤及惡性腫瘤的唾液蛋白組學(xué)初探
[Abstract]:Saliva is an exocrine fluid of the human body, secreted mainly by three large salivary glands (parotid glands, submandibular glands, sublingual glands). Saliva is rich in organic and inorganic components, containing more than a thousand proteins and a large number of inorganic salts. Conventional diagnosis of diseases using saliva has not been achieved yet. Studies have shown that when systemic diseases or local oral lesions occur, the expression of many salivary proteins changes, such as diabetes, Schoegren's syndrome, periodontitis and oral squama. So, parotid gland as one of the three salivary glands secreting saliva, when the tumor occurs, the salivary protein composition will theoretically change, these changes for the diagnosis of parotid gland tumors have reference value? In order to explore parotid pleomorphic adenoma (PMA) and parotid malignant tumor (parotid malignancy) Ors (PMT) exists abnormal expression of salivary proteins secreted by parotid glands. In this study, the Liquid chromatography electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) technique was used to analyze the salivary proteins in parotid tumor patients by proteomic analysis and the use of ELISA technology. Objectives: 1. To find protein markers that can reflect the presence of parotid gland tumors by determining the salivary protein groups of different parotid gland tumor patients and normal people. 2. To confirm the existence of important proteins in saliva identified by mass spectrometry. 3. To find out the salivary protein components of different parotid gland tumor patients by comparing the salivary protein components. Methods: Samples of parotid gland saliva from 5 patients with pleomorphic adenoma, 5 patients with malignant tumor of parotid gland and 5 patients with normal salivary gland were collected, and the differentially expressed proteins were screened by mass spectrometry. On one side, salivary protein was extracted, purified, concentrated, lysed and desalted, then analyzed by mass spectrometry. After differentially expressed proteins were identified, the sample size was increased and the Galectin-7 significantly increased in pleomorphic adenoma group was identified by ELISA kit. The expression of Galectin-7 in PMA group was significantly higher than that in PMT group and control group; the expression of SPARCL1 (Hevin) in PMT group was significantly lower than that in PMA group and control group; the expression of Azurocidin and ARPC4-TTLL3 in PMA group and PMT group was significantly higher than that in control group; the expression of Cystatin C and Lipocalin-1 in PMA group and PMT group was significantly higher than that in PMT group. Galectin-7 was detected by ELISA in 18 PMA samples, 6 normal samples and 5 malignant tumor samples. The results of non-parametric and rank sum tests showed that Galectin-7 content in saliva was higher in pleomorphic adenoma group than in control group (P = 0.002) and malignant tumor group (P = 0.008). There was no significant difference between the control group and the malignant tumor group (P = 0.193). Conclusion: 1. Mass spectrometry can specifically screen out salivary proteins with significant changes in parotid tumor patients. 2. Mass spectrometry and ELISA detection showed that the expression of Galectin-7 in saliva was significantly higher in pleomorphic adenoma group. There was no significant difference between the control group and the malignant tumor group. 3. Galectin-7 is expected to provide an important reference for the preoperative non-invasive diagnosis of pleomorphic adenoma.
【學(xué)位授予單位】:山東大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:R739.8
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