Inhibition of measles virus and subacute sclerosing panencephalitis virus by RNA interference.

Inhibition of measles virus and subacute sclerosing panencephalitis virus by RNA interference.
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DOI:
10.1016/j.antiviral.2006.01.009
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发表时间:
2006-07
期刊:
影响因子:
7.6
通讯作者:
Hotta H
Hotta H
中科院分区:
医学2区
文献类型:
--
作者:
Otaki M;Sada K;Kadoya H;Nagano-Fujii M;Hotta H

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亚急性硬化性全脑炎(SSPE)是一种罕见的,但致命的结果麻疹病毒(MeV)感染。SSPE是在被称为SSPE病毒的突变MeV长期持续存在后发展的。虽然使用干扰素和inosiplex或利巴韦林的联合治疗似乎在一定程度上延长了生存时间,但目前还没有完全治愈SSPE的有效治疗方法,因此非常需要新的治疗策略。在本研究中,我们采用RNA干扰(RNAi)的策略,并检查是否可以使用小干扰RNA(siRNA)来抑制MeV和SSPE病毒的复制。我们在这里报告,针对MeV的L mRNA的siRNA,无论是合成的siRNA还是由基于pcPUR + U6i的表达质粒产生的siRNA,都有效且特异性地抑制MeV和SSPE病毒的复制,而不表现出任何细胞毒性作用。MeV的L蛋白是RNA依赖性RNA聚合酶的主要组分,其对于病毒RNA复制是必需的,然而其在所有表达的MeV蛋白中最不丰富。因此,编码L蛋白的mRNA将是RNAi策略的良好靶标。目前的结果意味着我们针对MeV L mRNA的siRNA可能是用于治疗SSPE患者的潜在候选者之一。
Subacute sclerosing panencephalitis (SSPE) is a rare, but fatal outcome of measles virus (MeV) infection. SSPE develops after prolonged persistence of mutated MeV called SSPE virus. Although a combination therapy using interferon and inosiplex or ribavirin appears to prolong survival time to some extent, there is currently no effective treatment to completely cure SSPE and a new treatment strategy is greatly needed. In this study, we adopted RNA interference (RNAi) strategy and examined whether small interfering RNAs (siRNAs) can be used to inhibit replication of MeV and SSPE virus. We report here that siRNAs targeted against L mRNA of MeV, either synthetic siRNAs or those generated by pcPUR + U6i-based expression plasmids, effectively and specifically inhibited replication of both MeV and SSPE virus without exhibiting any cytotoxic effect. The L protein of MeV is a major component of RNA-dependent RNA polymerase that is essential for viral RNA replication, and yet it is least abundant among all the MeV proteins expressed. Therefore, mRNA encoding the L protein would be a good target for RNAi strategy. The present results imply the possibility that our siRNAs against MeV L mRNA are among the potential candidates to be used to treat patients with SSPE.
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