IL-6體外誘導巨噬細胞M2樣分化的機制研究
[Abstract]:BACKGROUND Macrophages are a group of cells with various characteristics in the human immune system, which play an important role in the body's defense against bacterial, viral and parasitic infections. It is a tumor-associated macrophage (TAMs). TAM is the aggregation and differentiation of peripheral circulating monocytes stimulated by local CCL2, macrophage colony-stimulating factor (M-CSF) and vascular endothelial growth factor (VEGF). Macrophages have two main phenotypes, M1 and M2. M1 macrophages can be induced by LPS or IFN-gamma. M1 macrophages are powerful effector cells that kill microorganisms, produce inflammatory cytokines such as tumor necrosis factor-alpha (TNF-alpha) and IL-12, and play an important role in eliminating bacterial, viral and fungal infections. Instead, M2 macrophages produce IL-10 and transform growth factors. M2 macrophages also play an important role in tissue remodeling, parasitic infection, angiogenesis and tumor progression. Interleukin-6 is multipotent and can affect many functions of the body, such as vascular disease, lipid metabolism, insulin resistance and neuropsychological behavior. IL-6 is a STAT3 signaling pathway. A powerful activator, activated P-STAT3 signaling protein, translocates rapidly into the nucleus and binds to the recognition sequence of target genes such as cyclin D1, c-myc, and the promoter of VEGF, thereby increasing the transcription and expression of these target genes. In previous studies, we found that the expression of IL-6 in cancer tissues was higher than that in non-tumor tissues. At the same time, the infiltration of M2 macrophages was also increased in cancer tissues. By detecting the phenotypic characteristics of macrophages induced by IL-6 stimulation, we found that IL-6 could induce normal macrophages to differentiate into M2-like macrophages. The expression of IL-10 and TGF-beta increased, while the expression of IL-12p35 decreased. Objective: 1. To establish a cell model of macrophage differentiation induced by IL-6 in vitro and explore the effect of IL-6 on macrophage differentiation and the specific signal mechanism of inducing differentiation. CD14+ monocytes from peripheral blood (PBMC) of healthy adults were selected by sorting method. The purity of CD14+ monocytes was detected by flow cytometry. After 5 days of induction and differentiation by recombinant human macrophage colony-stimulating factor (M-CSF), macrophages were induced to differentiate into macrophages. After stimulation by IL-6, macrophages were further differentiated into M2 phenotypes. Real-time fluorescence quantitative PCR was used to detect the molecular marker (IL-10, TGF-beta). IL-6 could activate JAK-STAT3 signaling pathway. Activated STAT3 (p-stat3) could enter the nucleus, act on its downstream target genes and participate in transcriptional regulation. In this study, Western blot and immunofluorescence were used to confirm that IL-6 could activate STAT3-p-STAT3 signaling pathway. At the same time, small interfering RNA (si RNA) was used to interfere with STAT3 target gene. STAT3 expression in macrophages was silenced in advance. The expression of IL-10 and TGF-beta was detected by real-time fluorescence quantitative PCR. The regulatory role of STAT3 in the process of IL-6 induced macrophage differentiation was further explored. Invasion and cell proliferation assay (CCK8) was used to study the biological function of induced macrophages. Gastric cancer cells (AGS, SGC-7901) were co-cultured with IL-6-induced M2-like macrophage supernatant to study the effects of induced macrophages on the invasion and proliferation of gastric cancer cells. After nuclear cells differentiated into macrophages, the expression of IL-10, TGF-beta and IL-12p35 were increased and decreased by IL-6 stimulation. Moreover, with the increase of IL-6 stimulation concentration, the expression of IL-10 and TGF-beta in macrophages increased, while the expression of IL-12p35 decreased with the increase of IL-6 concentration. The expression of STAT3 and p-STAT3 in macrophages stimulated by IL-6 did not increase, but the expression of activated phosphorylated STAT3, p-STAT3, increased significantly in macrophages stimulated by IL-6. Immunofluorescence assay showed that a large number of activated p-STAT3 fluorescent signals were observed in the macrophages stimulated by IL-6, and the activated p-STAT3 was distributed in the nucleus of the cells. In the cell group, the expression of p-STAT 3 decreased. With the decrease of p-STAT 3 expression, the expression levels of IL-10 and TGF-beta were also lower than those in the non-silent group. 3. The supernatants of M2-like macrophages were co-cultured with two gastric cancer cell lines (AGS, SGC-7901). The results showed that the number of tumor cells passing through basement membrane (AGS 257.6 (+ 6.26) and SGC 218.6 (+ 4.62) in M2-like macrophage supernatant culture group was significantly higher than that in the corresponding control group (AGS 187.8 (+ 6.09) and SGC 152 (+ 7.91). Similarly, CCK8 proliferation test showed that the number of tumor cells passing through basement membrane in M2-like macrophage supernatant culture group was significantly higher than that in the corresponding control group. The OD450 value of gastric cancer cells in co-culture group at 72 h (AGS 1.25+0.12; SGC 1.33+0.14) was significantly higher than that of RPMI-1640 control group (AGS 0.90+0.02; SGC 0.98+0.07). Conclusion: 1. IL-6 induces macrophages to overexpress IL-10 and TGF-beta, whereas IL-12p35 is underexpressed. The induced macrophage phenotype is M2-like (IL-10 high TGF-beta high IL-12p35 low). At the same time, the expression of IL-10 and TGF-beta increases with the increase of IL-6 stimulation concentration, and the induction effect is IL-6 concentration-dependent.2, IL-6 induces macrophage fineness. During M2-like differentiation, JAK/STAT3 signaling pathway is activated, and activated p-STAT3 enters the nucleus, which promotes the expression of IL-10 and TGF-beta, inhibits the expression of IL-12p35, and participates in the regulation of IL-6-induced M2-like polarization of macrophages.3, IL-6-induced M2-like macrophages can promote the proliferation and migration of gastric cancer cells, and thus promote tumor. Progress.
【學位授予單位】:第三軍醫(yī)大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:R392
【相似文獻】
相關期刊論文 前10條
1 鄭振群;;關于巨噬細胞的幾個問題[J];山西醫(yī)藥雜志;1974年12期
2 ;豚鼠巨噬細胞經(jīng)P_(204)處理后的抗石英細胞毒作用[J];國外醫(yī)學參考資料(衛(wèi)生學分冊);1976年04期
3 鄧俠進;;巨噬細胞的抗癌作用[J];遵義醫(yī)學院學報;1979年02期
4 陸天才;;疾病對肺巨噬細胞的影響[J];煤礦醫(yī)學;1982年01期
5 郭瑞清;祝彼得;;一種分離巨噬細胞的簡單方法[J];濱州醫(yī)學院學報;1990年02期
6 謝志堅;巨噬細胞異質(zhì)性[J];醫(yī)學綜述;2001年06期
7 饒艷;運動及神經(jīng)內(nèi)分泌對巨噬細胞功能的調(diào)節(jié)[J];體育與科學;2002年05期
8 朱金元;;吸煙對肺巨噬細胞的影響[J];浙江醫(yī)學教育;2003年01期
9 張俊峰;過氧化物酶體增殖物激活受體與單核/巨噬細胞系[J];醫(yī)學綜述;2004年03期
10 韋錦學;顧軍;;巨噬細胞的激活誘導死亡[J];生命科學;2006年02期
相關會議論文 前10條
1 史玉玲;王又明;豐美福;;巨噬細胞激活作用的研究[A];中國細胞生物學學會第五次會議論文摘要匯編[C];1992年
2 吳國明;周輝;;巨噬細胞和創(chuàng)傷纖維化[A];2009年浙江省骨科學學術年會論文匯編[C];2009年
3 李奇;王海杰;;透明質(zhì)酸對于淋巴結(jié)巨噬細胞運動的影響[A];解剖學雜志——中國解剖學會2002年年會文摘匯編[C];2002年
4 劉革修;歐大明;劉軍花;黃紅林;廖端芳;;丙丁酚在體外能抑制巨噬細胞脂質(zhì)氧化介導的低密度脂蛋白氧化并調(diào)節(jié)氧化巨噬細胞的分泌功能[A];面向21世紀的科技進步與社會經(jīng)濟發(fā)展(下冊)[C];1999年
5 葉金善;楊麗霞;郭瑞威;;環(huán)氧化酶-2/前列腺素E_2在血管緊張素Ⅱ刺激巨噬細胞表達細胞外基質(zhì)金屬蛋白酶誘導因子中的作用[A];第十三次全國心血管病學術會議論文集[C];2011年
6 秦帥;陳希;孔德明;;構(gòu)建由綠色熒光標記巨噬細胞的轉(zhuǎn)基因斑馬魚系[A];貴州省中西醫(yī)結(jié)合內(nèi)分泌代謝學術會論文匯編[C];2012年
7 武劍華;徐惠綿;;腫瘤相關巨噬細胞在胃癌中的相關研究[A];第9屆全國胃癌學術會議暨第二屆陽光長城腫瘤學術會議論文匯編[C];2014年
8 何軍;;血凝素樣氧化型低密度脂蛋白受體升高巨噬細胞內(nèi)膽固醇水平[A];中華醫(yī)學會第11次心血管病學術會議論文摘要集[C];2009年
9 宋盛;周非凡;邢達;;PDT誘導的凋亡細胞對巨噬細胞NO合成的影響[A];第七屆全國光生物學學術會議論文摘要集[C];2010年
10 張磊;朱建華;黃元偉;姚航平;;血管緊張素Ⅱ?qū)奘杉毎?THP-1重細胞)凝集素樣氧化低密度脂蛋白受體表達的影響[A];浙江省免疫學會第五次學術研討會論文匯編[C];2004年
相關重要報紙文章 前10條
1 通訊員 李靜 記者 胡德榮;惡性腫瘤巨噬細胞未必皆“惡人”[N];健康報;2014年
2 蘭克;以嘗試用巨噬細胞治癱瘓[N];科技日報;2000年
3 薛佳;免疫系統(tǒng)——人體的“衛(wèi)士”[N];保健時報;2009年
4 記者 胡德榮;鐵泵蛋白“維穩(wěn)”鐵代謝作用首次闡明[N];健康報;2011年
5 侯嘉 何新鄉(xiāng);硒的神奇功能[N];中國食品質(zhì)量報;2003年
6 唐穎 倪兵 陳代杰;巨噬細胞泡沫化抑制劑研究快步進行[N];中國醫(yī)藥報;2006年
7 本報記者 任曉;周小川:M2目標強調(diào)貨幣供應不能過快[N];中國證券報;2013年
8 證券時報兩會報道組;周小川:M2增13%強調(diào)貨幣供應不能太快[N];證券時報;2013年
9 方泉;股市資金面:M2的誤區(qū)[N];證券時報;2009年
10 本報兩會報道組;周小川:M2擬定13%是強調(diào)貨幣供應量增長不能太快[N];上海證券報;2013年
相關博士學位論文 前10條
1 周赤燕;巨噬細胞MsrA對動脈粥樣硬化的干預研究[D];武漢大學;2013年
2 章桂忠;TIPE2蛋白調(diào)控細胞增殖和炎癥的機制研究[D];山東大學;2015年
3 張瑜;DKK1抑制巨噬細胞內(nèi)脂質(zhì)沉積及其相關分子機制[D];山東大學;2015年
4 孟濤;異丙酚對心臟收縮功能的抑制作用及其對巨噬細胞分泌功能調(diào)節(jié)的機制研究[D];山東大學;2015年
5 周興;基于酵母微囊構(gòu)建新型口服巨噬細胞靶向遞送系統(tǒng)的研究[D];第三軍醫(yī)大學;2015年
6 蔣興偉;Tim-3對巨噬細胞極化的調(diào)控機制研究[D];中國人民解放軍軍事醫(yī)學科學院;2015年
7 劉伯玉;清道夫受體A介導小鼠巨噬細胞吞噬鉤端螺旋體研究[D];上海交通大學;2013年
8 楊紹俊;miRNA-155介導ESAT-6誘導巨噬細胞凋亡的分子機制及其在結(jié)核診斷中的作用[D];第三軍醫(yī)大學;2015年
9 翟光耀;單核/巨噬細胞Ly6C~(low)亞群在心肌梗死后瘢痕形成期的抗炎特性研究[D];北京協(xié)和醫(yī)學院;2014年
10 韓露;TRB3介導的脂肪組織巨噬細胞極化與糖尿病冠狀動脈病變關系的研究[D];山東大學;2015年
相關碩士學位論文 前10條
1 付小龍;IL-6體外誘導巨噬細胞M2樣分化的機制研究[D];第三軍醫(yī)大學;2017年
2 馬春梅;AP0E~(-/-)小鼠TLR9介導巨噬細胞極化效應對動脈粥樣硬化作用的研究[D];福建醫(yī)科大學;2015年
3 張譯丹;鹽皮質(zhì)激素受體拮抗劑調(diào)控巨噬細胞表型對實驗性矽肺的作用[D];河北醫(yī)科大學;2015年
4 盧文冉;HCV core蛋白作用的巨噬細胞培養(yǎng)上清對肝細胞生物學性狀的影響[D];河北醫(yī)科大學;2015年
5 李文建;載脂蛋白E影響巨噬細胞因子表達及分型的機制研究[D];河北醫(yī)科大學;2015年
6 曹爽;高糖對巨噬細胞TLR4信號轉(zhuǎn)導的調(diào)節(jié)作用[D];河北醫(yī)科大學;2015年
7 寧程程;腫瘤相關巨噬細胞在子宮內(nèi)膜癌雌激素敏感性中的作用及機制研究[D];復旦大學;2014年
8 高龍;PLD4在腫瘤相關巨噬細胞抑制結(jié)腸癌增殖中的作用研究[D];成都醫(yī)學院;2015年
9 任虹;感染期子宮頸癌U14細胞荷瘤小鼠抑制巨噬細胞CCL5分泌的機制研究[D];河北醫(yī)科大學;2015年
10 李美玲;雙酚A對小鼠腹腔巨噬細胞極化影響的體外研究[D];安徽醫(yī)科大學;2015年
,本文編號:2189745
本文鏈接:http://sikaile.net/yixuelunwen/jichuyixue/2189745.html