赖氨酸乙酰转移酶KAT8在抗病毒免疫应答中的调控作用及机制研究
发布时间:2021-07-22 14:53
转录因子IRF3是病毒诱导的I型干扰素的产生和天然免疫应答所必需的,IRF3的转录活性受经典的翻译后修饰,比如磷酸化和泛素化的严密调控。我们的研究明确了一种非经典的翻译后修饰可以直接抑制IRF3的转录活性,负向调控抗病毒免疫应答。本研究中,我们利用小干扰筛选体系,发现赖氨酸乙酰转移酶8(KAT8)能够选择性抑制RNA及DNA病毒诱导的I型干扰素的产生。KAT8缺失的小鼠与同窝对照小鼠相比,具有更强的抗病毒感染的能力。分子机制上,KAT8直接与IRF3相互作用,并通过其MYST结构域介导IRF3K359赖氨酸位点发生乙酰化修饰。进一步,KAT8抑制IRF3向I型干扰素启动子区的募集,降低IRF3的转录活性。我们的研究揭示了 KAT8介导的IRF3 K359赖氨酸乙酰化修饰在负向调控抗病毒免疫应答中的重要作用。
【文章来源】:浙江大学浙江省 211工程院校 985工程院校 教育部直属院校
【文章页数】:132 页
【学位级别】:博士
【部分图文】:
图2.1?KAT8真核表达载体截短体示意图??
图3.2.3小鼠腹腔巨噬细胞中,KAT8干扰后产生??Figure?3.2.3?KAT8?knockdown?selectively?prointerferons?in?peritoneal?macrophages??(A)?Immunoblot?analysis?of?KAT8?in?peritoneal?masiRNA?(siCtrl)?or?KAT8-specific?siRNA?(siKAT8).?(a,?TNF?and?IL-6?mRNA?levels?in?peritoneal?macrolater,?then?treated?with?LPS?(100?ng/ml),?Poly(I:C)?MOI)?or?HSV-1?(10?MOI)?for?the?indicated?times.and?IL-6?in?supernatants?of?peritoneal?macrophagethen?treated?with?LPS?(100?ng/ml),?Poly(I:C)?(10?^or?HSV-110?MOIfor?the?indicated?times.?**P?<?0.
图314?RAW264.7细胞中,KAT8缺失选择性促进病毒诱导的I型干扰素产生??Figure?3.2.4?KAT8?knockout?selectively?promotes?the?production?of?IFN-I?in??RAW264.7?cells??(A)?Immunoblot?analysis?of?KAT8?and?P-actin?in?KAT8-KO?or?control?RAW264.7??cells.?(B)?Q-PCR?analysis?of?IFN-P,?IFN-a??TNF?and?IL-6?mRNA?in?KAT8-KO?(KO-??1#,?KO-2#)?or?control?(Mock)?RAW264.7?cells?left?untreated?(Med)?or?infected?with??VSV?(1?MOI)?for?the?indicated?times.?(C)?ELISA?of?IFN-(3,?IFN-a,?TNF?and?IL-6?in??supernatants?of?KAT8-KO?(KO-1#,?KO-2#)?or?control?(Mock)?RAW264.7?cells?left??untreated?(Med)?or?infected?with?VSV?(1?MOI)?for?the?indicated?times.?**P?<?〇.〇l??two-tailed?Student’s?t-test?(B,C).?Data?are?representative?of?three?independent??experiments?with?similar?results?(A)?or?a
本文编号:3297360
【文章来源】:浙江大学浙江省 211工程院校 985工程院校 教育部直属院校
【文章页数】:132 页
【学位级别】:博士
【部分图文】:
图2.1?KAT8真核表达载体截短体示意图??
图3.2.3小鼠腹腔巨噬细胞中,KAT8干扰后产生??Figure?3.2.3?KAT8?knockdown?selectively?prointerferons?in?peritoneal?macrophages??(A)?Immunoblot?analysis?of?KAT8?in?peritoneal?masiRNA?(siCtrl)?or?KAT8-specific?siRNA?(siKAT8).?(a,?TNF?and?IL-6?mRNA?levels?in?peritoneal?macrolater,?then?treated?with?LPS?(100?ng/ml),?Poly(I:C)?MOI)?or?HSV-1?(10?MOI)?for?the?indicated?times.and?IL-6?in?supernatants?of?peritoneal?macrophagethen?treated?with?LPS?(100?ng/ml),?Poly(I:C)?(10?^or?HSV-110?MOIfor?the?indicated?times.?**P?<?0.
图314?RAW264.7细胞中,KAT8缺失选择性促进病毒诱导的I型干扰素产生??Figure?3.2.4?KAT8?knockout?selectively?promotes?the?production?of?IFN-I?in??RAW264.7?cells??(A)?Immunoblot?analysis?of?KAT8?and?P-actin?in?KAT8-KO?or?control?RAW264.7??cells.?(B)?Q-PCR?analysis?of?IFN-P,?IFN-a??TNF?and?IL-6?mRNA?in?KAT8-KO?(KO-??1#,?KO-2#)?or?control?(Mock)?RAW264.7?cells?left?untreated?(Med)?or?infected?with??VSV?(1?MOI)?for?the?indicated?times.?(C)?ELISA?of?IFN-(3,?IFN-a,?TNF?and?IL-6?in??supernatants?of?KAT8-KO?(KO-1#,?KO-2#)?or?control?(Mock)?RAW264.7?cells?left??untreated?(Med)?or?infected?with?VSV?(1?MOI)?for?the?indicated?times.?**P?<?〇.〇l??two-tailed?Student’s?t-test?(B,C).?Data?are?representative?of?three?independent??experiments?with?similar?results?(A)?or?a
本文编号:3297360
本文链接:https://www.wllwen.com/yixuelunwen/jichuyixue/3297360.html