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Innate immunity and hepatocarcinoma:Can toll-likereceptors open the door to oncogenesis?

World Journal of Hepatology 2016年第3期8卷 162-182页

作者： Jorge AndréGomes Lopes Marta Borges-Canha Pedro Pimentel-Nunes Department of Physiology and Cardiothoracic Surgery Cardiovascular Research and Development UnitFaculty of MedicineUniversity of Porto4200-319 PortoPortugal Gastroenterology Department Portuguese Oncology Institute4200-072 PortoPortugal CINTESIS/Department of Biostatistics and Medical Informatics Faculty of MedicineUniversity of Porto4200-319 PortoPortugal

Hepatocarcinoma(HCC) is a highly prevalent cancer worldwide and its inflammatory background was established long ago.Recent studies have shown that innate immunity is closely related to the HCC carcinogenesis.An effective innate immunity response relies on the tolllike receptors(TLR) found in several different liver cells which,through different ligands and many signaling pathways can elicit,not only a pro-inflammatory but also an oncogenic or anti-oncogenic response.Our aim was to study the role of TLRs in the liver oncogenesis and as a consequence their value as potential therapeutic targets.We performed a systematic review of PubMed searching for original articles studying the relationship between HCC and TLRs until March 2015.TLR2 appears to be a fundamental stress-sensor as its absence reveals an augmented tendency to accumulate DNAdamages and to cell survival.However,pathways are still not fully understood as TLR2 up-regulation was also associated to enhanced tumorigenesis.TLR3 has a wellknown protective role influencing crucial processes like angiogenesis,cell growth or proliferation.TLR4 works as an interesting epithelial-mesenchymal transition's inducer and a promoter of cell survival probably inducing HCC carcinogenesis even though an anti-cancer role has already been observed.TLR9's influence on carcinogenesis is also controversial and despite a potential anticancer capacity,a pro-tumorigenic role is more likely.Genetic polymorphisms in some TLRs have been found and its influence on the risk of HCC has been reported.As therapeutic targets,TLRs are already in use and have a great potential.In conclusion,TLRs have been shown to be an interesting influence on the HCCs microenvironment,with TLR3 clearly determining an antitumour influence.TLR4 and TLR9 are considered to have a positive relationship with tumour development even though,in each of them anti-tumorigenic signals have been described.TLR2 presents a more ambiguous role,possibly depending on the stage of the inflammationHCC axis.

关键词： Hepatocarcinoma Carcinogenesis toll-likereceptor Innate immunity Chronic inflammation

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激活HaCat细胞表面TLR促进细胞迁移的初步研究

引用

临床军医杂志 2010年第3期38卷 334-337页

作者：赵宝平赵增强高宗科韩勇彬黄松涛胡大海李艳秋解放军第537医院陕西宝鸡721006

目的观察长链游离脂肪酸对体外培养的角质形成细胞的作用,探讨其促进细胞迁移的机制。方法 (1)体外培养HaCat细胞。(2)免疫印迹法(Weston bloten)检测HaCat细胞表面TLR2、TLR4表达。(3)划痕实验法检测激活TLR对HaCat细胞迁移率的影响。(... 详细信息

目的观察长链游离脂肪酸对体外培养的角质形成细胞的作用,探讨其促进细胞迁移的机制。方法 (1)体外培养HaCat细胞。(2)免疫印迹法(Weston bloten)检测HaCat细胞表面TLR2、TLR4表达。(3)划痕实验法检测激活TLR对HaCat细胞迁移率的影响。(4)Real Time-PCR法分析N、PA、SA、LPS组MMP-3、MMP-9、TIMP-1的表达。结果 (1)HaCat细胞表面有丰富的TLR2、TLR4受体表达。(2)SA、LPS激活细胞表面TLR后可以明显促进细胞迁移,从而发挥促进创面愈合的作用。结论 SA、LPS可促进角质形成细胞迁移从而促进创面愈合;其机制可能为:SA作用于TLR促进细胞释放MMP-1、MMP-9、抑制TIMP-1表达等因素有关。

关键词：游离脂肪酸 HaCat细胞 toll-likereceptor 创面愈合

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