Small tRNA-derived RNAs are increased and more abundant than microRNAs in chronic hepatitis B and C.

Small tRNA-derived RNAs are increased and more abundant than microRNAs in chronic hepatitis B and C.
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DOI:
10.1038/srep07675
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发表时间:
2015-01-08
期刊:
影响因子:
4.6
通讯作者:
Sethupathy P
Sethupathy P
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Selitsky SR;Baran-Gale J;Honda M;Yamane D;Masaki T;Fannin EE;Guerra B;Shirasaki T;Shimakami T;Kaneko S;Lanford RE;Lemon SM;Sethupathy P

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B型肝炎病毒(HBV)或丙型肝炎病毒(HCV)的持续感染占全世界肝硬化和肝细胞癌(HCC)病例的大多数。小的非编码RNA在病毒-宿主相互作用中发挥重要作用。我们使用高通量测序对日本晚期B肝炎或丙型肝炎和肝细胞癌(HCC)受试者肝脏中的小(14-40 nt)RNA进行了无偏分析。 来源于tRNA的小RNA,特别是30-35个核苷酸长的5′ tRNA-halves(5′ tRH),在非恶性肝脏中大量存在,并且在患有慢性病毒性肝炎的人类和黑猩猩中显著增加。在大多数感染的非癌组织中,5′ tRH丰度超过microRNA丰度。相反,在匹配的癌组织中,5′ tRH丰度降低,单个5′ tRH的相对丰度改变。在乙型肝炎相关的HCC中,5′ tRH丰度与切割tRNA的核糖核酸酶血管生成素的表达相关。这些结果表明,tRH是最丰富的小RNA在慢性感染的肝脏,它们的丰度在肝癌中改变。
Persistent infections with hepatitis B virus (HBV) or hepatitis C virus (HCV) account for the majority of cases of hepatic cirrhosis and hepatocellular carcinoma (HCC) worldwide. Small, non-coding RNAs play important roles in virus-host interactions. We used high throughput sequencing to conduct an unbiased profiling of small (14-40 nts) RNAs in liver from Japanese subjects with advanced hepatitis B or C and hepatocellular carcinoma (HCC). Small RNAs derived from tRNAs, specifically 30–35 nucleotide-long 5′ tRNA-halves (5′ tRHs), were abundant in non-malignant liver and significantly increased in humans and chimpanzees with chronic viral hepatitis. 5′ tRH abundance exceeded microRNA abundance in most infected non-cancerous tissues. In contrast, in matched cancer tissue, 5′ tRH abundance was reduced, and relative abundance of individual 5′ tRHs was altered. In hepatitis B-associated HCC, 5′ tRH abundance correlated with expression of the tRNA-cleaving ribonuclease, angiogenin. These results demonstrate that tRHs are the most abundant small RNAs in chronically infected liver and that their abundance is altered in liver cancer.
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