Small noncoding RNA profiles along alternative developmental trajectories in an annual killifish.

Autor: Romney ALT; Department of Biology, Portland State University, P.O. Box 751, Portland, OR, 97207, USA. arom2@pdx.edu.; Department of Anatomy, Physiology & Cell Biology, University of California at Davis School of Veterinary Medicine, One Shields Ave, Davis, CA, 95616, USA. arom2@pdx.edu., Podrabsky JE; Department of Biology, Portland State University, P.O. Box 751, Portland, OR, 97207, USA. jpod@pdx.edu.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2018 Sep 06; Vol. 8 (1), pp. 13364. Date of Electronic Publication: 2018 Sep 06.
DOI: 10.1038/s41598-018-31466-7
Abstrakt: Embryonic development of Austrofundulus limnaeus can occur along two phenotypic trajectories that are physiologically and biochemically distinct. Phenotype appears to be influenced by maternal provisioning based on the observation that young females produce predominately non-diapausing embryos and older females produce mostly diapausing embryos. Embryonic incubation temperature can override this pattern and alter trajectory. We hypothesized that temperature-induced phenotypic plasticity may be regulated by post-transcriptional modification via noncoding RNAs. As a first step to exploring this possibility, RNA-seq was used to generate transcriptomic profiles of small noncoding RNAs in embryos developing along the two alternative trajectories. We find distinct profiles of mature sequences belonging to the miR-10 family expressed in increasing abundance during development and mature sequences of miR-430 that follow the opposite pattern. Furthermore, miR-430 sequences are enriched in escape trajectory embryos. MiR-430 family members are known to target maternally provisioned mRNAs in zebrafish and may operate similarly in A. limnaeus in the context of normal development, and also by targeting trajectory-specific mRNAs. This expression pattern and function for miR-430 presents a potentially novel model for maternal-embryonic conflict in gene regulation that provides the embryo the ability to override maternal programming in the face of altered environmental conditions.
Databáze: MEDLINE
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