EST-based profiling and comparison of gene expression in the silkworm fat body during metamorphosis

The fat body plays key roles in metabolism and sustenance of growth throughout the life of a silkworm, and thus represents a model tissue for studying development and metamorphosis. Analysis of 18,480 ESTs derived from larval and pupal fat body cDNA libraries allowed characterization of gene express...

Full description

Saved in:
Bibliographic Details
Published in:Archives of insect biochemistry and physiology 2006, Vol.61 (1), p.10-23
Main Authors: Cheng, D.J, Xia, Q.Y, Zhao, P, Wang, Z.L, Xu, H.F, Li, G.R, Lu, C, Xiang, Z.H
Format: Article
Language:English
Subjects:
alternation
Animals
Bombyx - genetics
Bombyx - growth & development
Bombyx mori
cDNA libraries
DNA fingerprinting
DNA Primers - genetics
EST
Expressed Sequence Tags
fat body
Fat Body - metabolism
Female
gene expression
Gene Expression Profiling
genes
Genes, Insect
Larva - genetics
larvae
Male
metamorphosis
Metamorphosis, Biological - genetics
Molecular Sequence Data
Pupa - genetics
pupae
Reverse Transcriptase Polymerase Chain Reaction - methods
Sequence Analysis, DNA
silkworm
silkworms
stage-specific gene expression
transcription (genetics)
transcriptome
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The fat body plays key roles in metabolism and sustenance of growth throughout the life of a silkworm, and thus represents a model tissue for studying development and metamorphosis. Analysis of 18,480 ESTs derived from larval and pupal fat body cDNA libraries allowed characterization of gene expression patterns in the fat body during metamorphosis. By Phrap assembling, 6,814 estimated transcription units (TUs) were generated, 2,673 of which contained 60% of the total ESTs and represented 1,366 distinctive known genes. These genes were classified into 14 categories based on their known or putative functions, and most were found to be involved in metabolism and cell defense. Further comparative analysis of the expression profiles revealed that the gene expression patterns in the larval fat body strikingly differed from those in the pupal fat body. From this, we identified a subset of genes potentially associated with metamorphic events such as the formation or destruction of specific tissues, and simultaneously confirmed the stage-specific expression patterns of several identified genes using RT-PCR examination. This work will provide a valuable resource for studying regulatory mechanisms associated with fat body developmental changes and silkworm metamorphosis.
ISSN:0739-4462
1520-6327
DOI:10.1002/arch.20090