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© Research
Publication : Virus research

Investigation on torquetenovirus (TTV) microRNA transcriptome in vivo.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Virus research - 02 Jun 2016

Vignolini T, Macera L, Antonelli G, Pistello M, Maggi F, Giannecchini S,

Link to Pubmed [PMID] – 26959653

Link to DOI – 10.1016/j.virusres.2016.03.003S0168-1702(15)30191-X

Virus Res 2016 06; 217(): 18-22

Torquetenovirus (TTV) is a widespread anellovirus that establishes persistent infections in human showing an increased viremia in immunosuppressed patients. TTV possesses microRNA (miRNA)-coding sequences that might be involved in viral immune evasion. Here, the presence of TTV DNA and miRNAs expression was investigated in plasma samples of 77 diseased (20 infected with human immunodeficiency virus (HIV), 18 infected with hepatitis B (HBV) virus, 18 infected with hepatitis C (HCV) virus, 21 solid organ transplanted) patients, and 25 healthy controls. TTV prevalence was significantly different in healthy controls (60%, 15/25) versus diseased patients (80%, 62/77), showing the highest TTV loads in transplant recipients. Genetic TTV analysis showed the highest prevalence of group 1, followed by groups 3, 4 and 5, and a lack of isolates of group 2. The expression of at least one TTV miRNAs of group 1, 3 and 5 was found in exosomes of plasma of the great majority of individuals (96%, 98/102 subjects) showing the higher prevalence of miRNAs of TTV group 3 (90%, 92/102), followed by miRNAs of group 1 (66%, 67/102), and miRNA of group 5 (49%, 50/102). TTV miRNAs expression and TTV viremia were not always directly correlated, and significant differences appeared in production of some TTV miRNAs between healthy controls and diseased patients. The reported TTV miRNAs status in exosomes encourages further investigation to understand their potential role in the expansion of anelloviruses upon immunosuppression.

https://pubmed.ncbi.nlm.nih.gov/26959653