Abstract
#Multiple sclerosis (MS) is one of the #complex diseases.
Genetics, environmental and emotional factors have shown to play
essential roles in evoking the disease pathology. More interestingly,
epigenetic factors were established as major influencers of the
disease severity [1] Of those epigenetic factors; the #microRNA
(miRNA) plays a fundamental function in MS #pathogenicity. MiRNA
are small noncoding RNA molecules with a size of approximately
22 nucleotides involved in post-transcriptional regulations of the
genes [2-5]. In one of the first published papers on the relation
between MS and miRNA, Otaegui and his group found differential
miRNA profile between MS patient and healthy volunteers when
analyzing 364 #peripheral blood mononuclear cells (PBMC) samples.
More so, they found that even between MS patients, miRNA profile
can differentiate between remissions and relapses stages [6]. One
of the most attractive miRNA associated with MS was the miR-155.
In 2009, Junker et al have for the first time identified miR-155
upregulation in active MS lesions [7]. Subsequently, many have
established the role of this miRNA in relapsing stages of MS and
experimental autoimmune #encephalomyelitis (EAE) [4,8-15].
MiR-155 was of interest due to its important roles in #immunesystem regulation. This miRNA has been proven to target the
suppressor of cytokine signaling -1 (SOSC1); a negative regulator of
cytokines signaling. It was also proven to induce T- cell differentiation
along the T-helper 17 (Th17) and T-helper 1 (Th1) cells lines [16-
19].
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Multiple Sclerosis and the Pathogenicity of Mir-155 by Eiman MA Mohammed in BJSTR
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