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MicroRNA 518d (miR-518d)
- Target
- miR-518d
- Molecular classification
- MicroRNA, Non-coding RNA, C19MC cluster member (Chromosome 19 microRNA cluster)
01
Overview
MicroRNA 518d is a small (about 22 nucleotides), non-coding RNA molecule belonging to the microRNA family, located within the large C19MC cluster on chromosome 19. It regulates gene expression post-transcriptionally, typically by binding the 3' untranslated regions of target mRNAs, leading to mRNA degradation or translational repression. miR-518d is implicated in cellular processes such as proliferation, apoptosis, and differentiation, and may be dysregulated in certain cancers and developmental contexts. Its broad role in gene regulatory networks makes it of research interest, but limits its specificity as a therapeutic drug target.
- Other names
- MIR518Dhsa-mir-518dMIRN518DmicroRNA 518dmiR-518d-3p
02
Mechanism of action
miR-518d acts via base-pairing with complementary sequences in target mRNAs, resulting in translation repression or mRNA destabilization. Antisense oligonucleotides targeting miR-518d would theoretically block its activity.
03
Biological functions
Post-transcriptional regulation of gene expressionRegulation of cell proliferationModulation of apoptosisPossible involvement in immune responseRegulation of differentiation and developmental processes (context-dependent)
04
Disease associations
Cancer (notably germ cell tumors, other cancers where C19MC cluster is activated)Potential roles in other diseases where aberrant miRNA expression is relevant (e.g., pregnancy-related disorders, immune regulation)
05
Safety considerations
Challenges include off-target effectsdelivery of nucleic acid therapeuticscomplex network interactions in miRNA pathwaysmiRNAs regulate many targets, so therapeutic targeting risks broad biological effects
06
Biomarkers
Differential expression of miR-518d may serve as a biomarker in some cancers (e.g., germ cell tumors) for diagnosis or classification; not in routine clinical use
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