IL-17RC低甲基化影響葡萄膜炎的機(jī)制研究及中藥治療葡萄膜炎的臨床體會(huì)
[Abstract]:Background:
Sarcoidosis, a chronic disease involving multiple systems and characterized by non-caseous granulomatosis, is one of the common causes of ocular inflammation. Up to 24% of patients with ocular sarcoidosis have severe visual impairment, of which 10% are visually disabled or even blind, but early intervention can significantly improve the prognosis. At present, there are still many difficulties in the diagnosis of ocular sarcoidosis. Skin, peripheral lymph nodes and lung biopsy are the gold standard of diagnosis, but invasive methods will undoubtedly bring some harm to patients. Therefore, the discovery of new diagnostic markers to improve the safety and accuracy of diagnosis, and applied to treatment, with a view to Important clinical significance.
The emergence of epigenetic methods has opened a new chapter in the study of the pathogenesis of diseases. DNA methylation is one of the most prevalent epigenetic modifications in higher animals. IL-17RC exists on the cell membrane in the form of transmembrane proteins. As a co-receptor, IL-17 subtype binds specifically to IL-17 and activates multiple signal transduction pathways. Recent literature suggests that hypomethylation of IL-17RC promoter plays a role in ocular local inflammation, exudation and angiogenesis. We speculate that abnormal DNA methylation of IL-17RC promoter may be involved in the development of ocular sarcoidosis.
Uveitis is the most important manifestation of ocular sarcoidosis. At present, local or systemic application of glucocorticoids is the main treatment, and can be combined with immunosuppressive agents and biological agents, but the side effects are obvious, and prone to hormone dependence and rebound after withdrawal. Workers inherit and carry forward.
Objective:
Part I: To analyze the relationship between DNA methylation in the promoter region of IL-17RC and ocular sarcoidosis, to detect the ability of IL-17 to induce IL-17RC expression, and to explore the role of IL-17RC promoter methylation in the molecular mechanism of ocular sarcoidosis.
The second part: uveitis is the most important clinical manifestation of ocular sarcoidosis. At present, western medicine treatment is limited, so the second part summarizes the clinical experience of Chinese medicine in the treatment of uveitis, to provide help for treatment.
Method:
Part I: Methylation sensitive restriction endonuclease (MSRE) PCR was used to detect the DNA methylation in the promoter region of IL-17RC in the ocular sarcoidosis group and the healthy control group. Flow cytomerty was used to compare the DNA methylation in the promoter region of IL-17RC between the two groups. The expression of IL-17RC protein on the surface of the main immune cells in peripheral blood was detected by enzyme linked immunosorbent assay (ELISA) and hematoxylin-eosin staining (HE). Immunohistochemical staining (IHC) and reverse transcription polymerase chain reaction (RT-PCR) were used to detect the expression of IL-17RC protein and mRNA in the retina of patients with ocular sarcoidosis, and anti-CD3/anti-CD28 antibodies were used to activate proliferating CD8+T cells in patients with ocular sarcoidosis and normal subjects. The expression of IL-17RC on the surface of the cells was compared by flow cytometry.
The second part: 1. Retrieve and read the literature of Chinese and Western medicine on uveitis, study the papers and works published by Jin Shi. 2. Follow the prescriptions of Jin Shi clinic, learn and record the teacher's thoughts of diagnosis and treatment, medication characteristics, and summarize the experience of treating uveitis.
Result:
Compared with the healthy control group, the DNA of IL-17RC promoter region in patients with ocular sarcoidosis was hypomethylated, and the difference was statistically significant (P 0.01); 2. In the peripheral blood of the main immune cells, the expression of IL-17RC on the surface of CD8 + T cells in patients with ocular sarcoidosis was higher than that in the healthy control group, the difference was statistically significant (P 0.05). 3. Compared with the healthy control group, the serum level of IL-17 in patients with ocular sarcoidosis increased significantly (P 0.01). 4. HE staining indicated that there were typical granulomatous lesions in the ocular tissues of patients with ocular sarcoidosis, and the active inflammatory tissues were chorioretinal scar (C-R scar), IHC staining suggested inflammation. IL-17RC deposition was observed in active retinal tissues. RT-PCR assay showed that the level of IL-17RC mRNA transcription in retinal tissues of patients with active inflammation was significantly increased (P 0.01); 5. Compared with the blank group without IL-17 stimulation, the surface of CD8+T cells in patients with ocular sarcoidosis and normal people after IL-17 stimulation was significantly higher (P 0.01). The expression of IL-17RC increased, but there was a significant difference between the normal group and the normal group (P0.01).
The second part: Professor Jin Ming advocates taking "western medicine differentiates disease, traditional Chinese medicine differentiates syndrome" as the center, using the western medicine system examination, ophthalmology specialized instrument and Chinese medicine "look, smell, ask, cut" four diagnoses concurrently, obtains the clinical first-hand medical history and the material, and advocates not to limit to the eye, should link the ophthalmopathy with the whole, comprehensive examination. Professor Jin Ming pointed out that in the diagnosis, not only the TCM syndrome differentiation should be based on the theory of TCM, but also the course should be divided into different stages, combined with specialized instruments, macroscopic syndrome differentiation and microscopic examination. In the aspect of syndrome differentiation and typing, Jin Shi does not stick to the current common typing, but according to the specific syndrome and course of disease, randomly respond. In the treatment, Jin Shi proposed early intervention to improve the prognosis, especially in the five rounds of the liver and kidney, and flexible use of Longdan Xiegan Tang (pills), Liuwei Dihuang recipe, the effect is very good. In addition, Jin Shi also according to Portugal. The characteristics of hormone application of uveitis were summarized, and the law of synergistic use of traditional Chinese medicine was summarized: early combination of traditional Chinese medicine to play the role of hormones can reduce hormone dosage, prevent disease progression, this period of traditional Chinese medicine to evacuate wind-heat, dispel wind over dampness, mainly to disperse evil. Chinese medicine can reduce the toxic and side effects caused by hormones and immunosuppressive agents and shorten the course of disease. The treatment is mostly purging liver and gallbladder fire and damp-heat, activating blood circulation and removing blood stasis, permeating dampness and detoxifying, and taking both supplements. Characteristic, regulate the immune function of the body, help hormone steady reduction, consolidate curative effect, reduce recurrence rate and complications, this period because patients take hormones for a long time, deficiency of positive qi, so Chinese medicine to nourish the liver and kidney.
Conclusion:
Part I: 1. Hypomethylation of IL-17RC promoter DNA in patients with ocular sarcoidosis suggests its association with ocular sarcoidosis. Hypomethylation of IL-17RC may be an epigenetic marker of ocular sarcoidosis; 2. Increased IL-17RC + CD8 + T cells in peripheral blood participate in the occurrence and development of ocular sarcoidosis; 3. IL-17RC content. The increased expression of IL-17RC in patients with ocular sarcoidosis may be due to high concentration of IL-17 stimulation in peripheral blood.
The second part: for the treatment of uveitis, should be a combination of Chinese and Western, make full use of advantages and avoid disadvantages, multi-pronged, so as to achieve the best results.
【學(xué)位授予單位】:北京中醫(yī)藥大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2014
【分類號(hào)】:R773.9
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