1. Parentally inherited long non-coding RNA Cyrano is involved in zebrafish neurodevelopment
- Author
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Divya Chaubey, Nagesh Srikakulam, Mayuresh Anant Sarangdhar, and Beena Pillai
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0301 basic medicine ,Embryo, Nonmammalian ,Inheritance Patterns ,Animals, Genetically Modified ,03 medical and health sciences ,RNA and RNA-protein complexes ,Genetics ,Gene Knockdown Techniques ,Animals ,Gene Regulatory Networks ,Zebrafish ,Regulation of gene expression ,Gene knockdown ,Zygote ,biology ,Sequence Analysis, RNA ,Brain ,Gene Expression Regulation, Developmental ,High-Throughput Nucleotide Sequencing ,RNA ,Embryo ,biology.organism_classification ,Long non-coding RNA ,MicroRNAs ,RNA, Messenger, Stored ,030104 developmental biology ,RNA, Long Noncoding - Abstract
Transfer of genetic material from parents to progeny via fusion of gametes is a way to ensure flow of information from one generation to the next. Apart from the genetic material, gametes provide a rich source of other factors such as RNA and proteins which can control traits of the embryo. Non-coding RNAs are not only carriers of regulatory information but can also encode memory of events of parental life. Here, we explore the possibility of parental inheritance of non-coding RNAs, especially long non-coding RNAs. Meta-analysis of RNA-seq data revealed several non-coding RNAs present in zebrafish oocyte, sperm and 2cell-stage. The embryo is transcriptionally silent at this stage, we rationalize that all the RNAs detectable at 2cell-stage are deposited either by sperm or oocyte or both and thus inherited. In the inherited pool, we noticed a conserved lncRNA, Cyrano previously known for zebrafish brain development. Knockdown of inherited Cyrano by miR-7 without changing zygotic Cyrano altered brain morphology at 24 hpf and 48 hpf. This defect could be partially rescued by injecting full length Cyrano lncRNA or a mutant resilient to knock-down by miR-7. In future, there is ample scope to check the possibility of inherited lncRNAs as carriers of memory of parental life events and building blocks that set up an initial platform for development.
- Published
- 2018
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