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A fungal tRNA of Aspergillus niger induces IFN-b synthesis in HEp-2 cells

机译:黑曲霉的真菌tRNA诱导HEp-2细胞中的IFN-b合成

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In this work, we evaluated the capacity of a fungal transfer RNA (F-tRNA) from Aspergillus niger to protect HEp-2 cells against a viral infection, and as an inducer of IFN-b synthesis, HEp-2 cells previously incubated with F-tRNA, polyI:polyC, or IFN-a, at different concentrations for 24 h were infected with 200 pfu of adenovirus type 6 (AdV-6); after 5 days, we determined cellular viability, cytopathic effect of the virus, optimal concentration necessary to inhibit the cytopathic effect, and IFN-b expression by RT-PCR, Results showed that HEp-2 cells treated with F-tRNA were less susceptible to the cytopathic effect of AdV-6 infection than those incubated with polyI:polyC (p < 0.05). On the other hand, F-tRNA- treated HEp-2 cells expressed IFN-b mRNA, whereas monolayers incubated with polyI:polyC or IFN-a did not. Our results suggest that F-tRNA protected HEp-2 cells against AdV-6 infection, due to its capacity to induce IFN-b synthesis. 2005 Elsevier Inc. All rights reserved.
机译:在这项工作中,我们评估了来自黑曲霉的真菌转移RNA(F-tRNA)保护HEp-2细胞免受病毒感染的能力,并且作为IFN-b合成的诱导剂,以前与F培养的HEp-2细胞用200 pfu的6型腺病毒(AdV-6)感染不同浓度的-tRNA,polyI:polyC或IFN-α24小时。 5天后,我们通过RT-PCR确定了细胞活力,病毒的细胞病变作用,抑制细胞病变作用所需的最佳浓度以及IFN-b的表达,结果表明,用F-tRNA处理的HEp-2细胞不易感染与用polyI:polyC孵育的病毒相比,AdV-6感染的细胞病变效应(p <0.05)。另一方面,经F-tRNA处理的HEp-2细胞表达IFN-b mRNA,而与polyI:polyC或IFN-a孵育的单层细胞则没有。我们的结果表明,由于F-tRNA具有诱导IFN-b合成的能力,因此可以保护HEp-2细胞免受AdV-6感染。 2005 Elsevier Inc.保留所有权利。

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