Journal
HELIYON
Volume 7, Issue 6, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.heliyon.2021.e07263
Keywords
MicroRNA; Natalizumab; Multiple sclerosis; B lymphocyte; Therapy
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miRNAs play crucial roles in MS by regulating gene expression in various cells. NTZ treatment modifies gene expression and miRNA levels in B cells, indicating a potential for specific miRNAs to serve as markers of therapeutic response in MS patients. Understanding the complex interaction between miRNAs, gene expression in B cells, and therapeutic response is important for MS treatment.
MicroRNAs (miRNAs) are a family of non-translated small ribonucleic acids (RNAs) measuring 21-25 nucleotides in length that play various roles in multiple sclerosis (MS). By regulating gene expression via either mediating translational repression or cleavage of the target RNA, miRNAs can alter the expression of transcripts in different cells, such as B lymphocytes, also known as B cells. They are crucial in the pathogenesis of MS; however, they have not been extensively studied during the treatment of some drugs such as natalizumab (NTZ). NTZ is a humanized immunoglobulin G4 antibody antagonist for integrin alpha 4 (alpha 4) used in the treatment of MS. The drug reduces the homing of lymphocytes to inflammation sites. Integrin alpha 4 expression on the cell surface of B cells is related to MS severity, indicating a critical component in the pathogenesis of the disease. NTZ plays an important role in modifying the gene expression in B cells and the levels of miRNAs in the treatment of MS. In this review, we have described changes in gene expression in B cells and the levels of miRNAs during NTZ therapy in MS and its relapse. Studies using the experimental autoimmune encephalomyelitis (EAE) model and those involving patients with MS have described changes in the levels of microRNAs in the regulation of proteins affected by specific miRNAs, gene expression in B cells, and certain functions of B cells as well as their sub-populations. Therefore, there is a possibility that some miRNAs could be studied at different stages of MS during NTZ treatment, and these specific miRNAs can be tested as markers of therapeutic response to this drug in future studies. Physiopathology, gene expression in B cells and their subpopulations can help understand this complex puzzle involving miRNAs and the therapeutic response of patients with MS.
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