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Chandra, S., Vimal, D., Sharma, D., Rai, V., Gupta, S.C., Chowdhuri, D.K. (2017). Role of miRNAs in development and disease: Lessons learnt from small organisms.  Life Sci. 185(): 8--14.
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MicroRNAs (miRNAs) constitute a class of small (18-22 nucleotides) non-coding RNAs that regulate gene expression at the post-transcriptional level. Caenorhabditis elegans, Drosophila melanogaster, and many other small organisms have been instrumental in deciphering the biological functions of miRNAs. While some miRNAs from small organisms are highly conserved across the taxa, others are organism specific. The miRNAs are known to play a crucial role during development and in various cellular functions such as cell survival, cell proliferation, and differentiation. The miRNAs associated with fragile X syndrome, Parkinson's disease, Alzheimer's disease, diabetes, cancer, malaria, infectious diseases and several other human diseases have been identified from small organisms. These organisms have been used as platforms in deciphering the functions of miRNAs in the pathogenesis of human diseases and to study miRNA biogenesis. Small organisms have also been used in the development of miRNA-based diagnostic, prognostic and therapeutic strategies. The molecular techniques such as genome sequencing, northern blot analysis, and quantitative RT-PCR, have been used in deciphering the functions of miRNAs in small organisms. How miRNAs from small organisms especially those from Drosophila and C. elegans regulate development and disease pathogenesis is the focus of this review. The outstanding questions raised by our current understanding are discussed.

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    Life Sci.
    Life Sciences
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