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MicroRNAs (miRNAs), as important regulators of post-transcriptional gene expression, play important roles in the occurrence and function of organs. In this study, morpholino (MO) knockdown of miR-462/miR-731 was used to investigate the potential mechanisms of the miR-462-731 cluster during zebrafish liver development. The results showed significant reduction of digestive organs, especially liver and exocrine pancreas after the miR-462/miR-731 knockdown, and those phenotypes could be partially rescued by corresponding miRNA duplex. Acinar cells of the exocrine pancreas were also severely affected with pancreatic insufficiency. In particular, knockdown of miR-462 caused pancreas morphogenesis abnormity with specific bilateral exocrine pancreas. Additionally, it was found that miR-731 played a role in liver and exocrine pancreas development by directly targeting dkk3b, instead of the down-regulation of Wnt/β-catenin signaling. These findings contribute significantly to our understanding of molecular mechanisms of miR-462-731 cluster in development of digestive organs.
This article was published in the following journal.
Name: Comparative biochemistry and physiology. Part D, Genomics & proteomics
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Proteins obtained from the ZEBRAFISH. Many of the proteins in this species have been the subject of studies involving basic embryological development (EMBRYOLOGY).
An exotic species of the family CYPRINIDAE, originally from Asia, that has been introduced in North America. They are used in embryological studies and to study the effects of certain chemicals on development.
An abnormal passage communicating between any components of the digestive system, or between any part of the digestive system and surrounding organ(s).
Endoscopic examination, therapy or surgery of the digestive tract.
Digestive system disorder where a particular food irritates the digestive tract or cannot be properly digested (i.e., due to a lack of a digestive enzyme). It differs from FOOD HYPERSENSITIVITY which is an immune system disorder, usually due to specific proteins in food. http://my.clevelandclinic.org/health/articles/problem-foods-is-it-an-allergy-or-intolerance.
The process of gene expression is used by eukaryotes, prokaryotes, and viruses to generate the macromolecular machinery for life. Steps in the gene expression process may be modulated, including the transcription, RNA splicing, translation, and post-tran...
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