BMB Rep. 2016; 49(6): 311-318  
MiR-146 and miR-125 in the regulation of innate immunity and inflammation
Hye-Mi Lee1, Tae Sung Kim1,2 & Eun-Kyeong Jo1,2,*
1Department of Microbiology and 2Department of Medical Science, Chungnam National University School of Medicine, Daejeon 35015, Korea
Correspondence to: Tel: +82-42-580-8243; Fax: +82-42-585-3686; E-mail: hayoungj@cnu.ac.kr
Received: March 16, 2016; Published online: June 30, 2016.
© Korean Society for Biochemistry and Molecular Biology. All rights reserved.

Abstract
Innate immune responses are primary, relatively limited, and specific responses to numerous pathogens and toxic molecules. Protein expression involved in these innate responses must be tightly regulated at both transcriptional level and post-transcriptional level to avoid the development of excessive inflammation that can be potentially harmful to the host. MicroRNAs are small noncoding RNAs (∼22 nucleotides [nts]) that participate in the regulation of numerous physiological responses by targeting specific messenger RNAs to suppress their translation. Recent work has shown that several negative regulators of transcription including microRNAs play important roles in inhibiting the exacerbation of inflammatory responses and in the maintenance of immunological homeostasis. This emerging research area will provide new insights on how microRNAs regulate innate immune signaling. It might show that dysregulation of microRNA synthesis is associated with the pathogenesis of inflammatory and infectious diseases. In this review, we focused on miR-146 and miR-125 and described the roles these miRNAs in modulating innate immune signaling. These microRNAs can control inflammatory responses and the outcomes of pathogenic infections.
Keywords: Inflammation, Innate immune, MicroRNA, miR-125, miR-146


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