Integrated Role of MicroRNA-30e-5p Through Targeting Negative Regulators of Innate Immune Pathways During HBV Infection and SLE

Precise regulation of innate immunity is crucial for the development of appropriate host immunity against microbial infection and maintenance of immune homeostasis. The microRNAs are small non-coding RNA, post-transcriptional regulator of multiple genes and act as a rheostat for protein expression. Here, we identified microRNA(miR)-30e-5p (miR-30e) induced by Hepatitis B virus (HBV) and other viruses that act as a master regulator for innate immune responses. Moreover, pegylated type I interferons treatment to HBV patient for viral reduction also reduces the miRNA. Additionally, we have also shown the immunopathological effects of miR-30e in systemic lupus erythematous (SLE) patients and SLE mouse model. Mechanistically, the miR-30e targets multiple negative regulators namely TRIM38, TANK, ATG5, ATG12, BECN1, SOCS1, SOCS3 of innate immune signaling pathways and enhances innate immune responses. Furthermore, sequestering of endogenous miR-30e in PBMCs of SLE patients and SLE mouse model respectively by introduction of antagomir and locked nucleic acid inhibitor significantly reduces type I interferon and pro-inflammatory cytokines. Collectively, our study demonstrates the novel role of miR-30e in innate immunity and its prognostic and therapeutic potential in infectious and autoimmune disease.