Comparative Expression Analysis Identifies the Respiratory Transition-related MiRNAs and Their Target Genes in Tissues of Metamorphosing Chinese Giant Salamander (Andrias Davidianus)

Overview

Journal BMC Genomics

Publisher Biomed Central

Specialty Genetics

Date 2018 May 31

PMID 29843595

Citations 4

Authors

Shengyan Su

Yuheng Wang

Huiwei Wang

Wei Huang

Jun Chen

Jun Xing

Pao Xu

Xinhua Yuan

Caiji Huang

Yulin Zhou

Affiliations

Soon will be listed here.

Abstract

Background: Chinese giant salamander (Andrias davidianus) undergoes a metamorphosis from aquatic larvae to terrestrial adults, with concomitant transfer of respiration from gills to lungs prior to metamorphosis. These two tissues, as well as skin, were sampled to identify the differentially expressed miRNAs.

Results: High-coverage reference transcriptome was generated from combined gill, lung and skin tissues of metamorphosing juveniles, and lung tissue of adults: 86,282 unigenes with total length of approximately 77,275,634 bp and N50 of 1732 bp were obtained. Among these, 13,246 unigenes were assigned to 288 pathways. To determine the possible involvement of miRNAs in the respiratory transition, small RNA libraries were sequenced; 282 miRNAs were identified, 65 among which were known and 217 novel. Based on the hierarchical clustering analysis, the twelve studied samples were classified into three major clusters using differentially expressed miRNAs. We have validated ten differentially expressed miRNAs and some of their related target genes using qPCR. These results largely corroborated the results of transcriptomic and miRNA analyses. Finally, an miRNA-gene-network was constructed. Among them, two miRNAs with target genes related to oxygen sensing were differentially expressed between gill and lung tissues. Three miRNAs were differentially expressed between the lungs of larvae and lungs of adults.

Conclusions: This study provides the first large-scale miRNA expression profile overview during the respiration transition from gills to lungs in Chinese giant salamander. Five differentially expressed miRNAs and their target genes were identified among skin, gill and lung tissues. These results suggest that miRNA profiles in respiratory tissues play an important role in the regulation of respiratory transition.

Citing Articles

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