Background: MicroRNAs (miRNAs) are small 20- to 24-nt non-coding RNAs involved in the post-transcriptional regulation of gene expression which play important defensive roles in several viral infections. Global expression profiles of cellular miRNAs have identified alterations of specific miRNAs post-HIV-1 infection both in vitro and in different patient cohorts suggesting potential roles for miRNA in pathogenesis and disease progression. We therefore decided to verify if natural resistance to HIV-1 infection observed in seronegative individuals repeatedly exposed to HIV-1 (HESN) through unprotected sexual intercourse could be secondary to a different expression of their miRNA profile. Method: expression levels of 25 miRNAs selected according to their proven anti-HIV-1 properties were analyzed in plasma, basal PBMC and in in vitro HIV-1 infected macrophages isolated from 30 HESN, 30 HIV seropositive subjects (HIV+) and 30 healthy controls (HC). Result: In plasma the expression of mir-155, mir-382, mir-28 and mir-198 was significantly augmented in both HIV+ and HESN compared to HC probably as a consequence of viral exposure. Conversely the expression of mir-223 and mir-150 in plasma was significantly increased only in HESN and this result was also confirmed in basal PBMC suggesting a protective effect for these miRNAs in resistance to HIV-1 infection. Furthermore, the expression of mir-150 was significantly increased in HESN macrophages following HIV-1 infection. Conclusion: mir-223 and mir-150 can target the 3’UTR of HIV-1 transcripts, and they have already been identified as anti-HIV-1 miRNAs. The higher expression of these miRNA in HESN samples could therefore represents a key protection mechanism against HIV infection.
|Titolo:||Plasma and PBMC miRNA profile in sexually HIV- exposed seronegative individuals|
|Data di pubblicazione:||18-mag-2015|
|Settore Scientifico Disciplinare:||Settore MED/04 - Patologia Generale|
Settore BIO/13 - Biologia Applicata
|Citazione:||Plasma and PBMC miRNA profile in sexually HIV- exposed seronegative individuals / I. Saulle, S. Yahyaei, M. Biasin, L.M. De Peri, F. Gnudi, A. Berzi, M. Garziano, M. Masetti, D. Trabattoni, S.L. Caputo, F. Mazzotta, M. Clerici. ((Intervento presentato al 7. convegno congresso nazionale ICAR Italian Conference on AIDS and Retroviruses tenutosi a Riccione nel 2015.|
|Appare nelle tipologie:||14 - Intervento a convegno non pubblicato|