Real-time RT-PCR quantification of Kuruma shrimp transcripts: a comparison of relative and absolute quantification procedures.

Real-time RT-PCR quantification of Kuruma shrimp transcripts: a comparison of relative and absolute quantification procedures. Research Abstract Details 

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Real-time RT-PCR quantification of Kuruma shrimp transcripts: a comparison of relative and absolute quantification procedures. Abstract Text:

Melony J Sellars,Tony Vuocolo,Lisa A Leeton,Greg J Coman,Bernard M Degnan,Nigel P Preston,

Housekeeping genes are often used as references when quantifying the relative abundance of transcripts of interest, because it is assumed that they are stably expressed across tissues and developmental stages. Standard housekeeping genes are targeted particularly in organisms where there is no detailed information on gene expression profiles. Here, the validity of using the two widely accepted housekeeping genes, 18S rRNA and beta-actin, as reference genes to normalize real-time RT-PCR gene expression data from the Kuruma shrimp, Marsupenaeus japonicus, was tested. Expression patterns of two target genes in a diverse sample set of embryonic, larval, post-larval and gonad mRNAs were quantified using relative and absolute real-time RT-PCR procedures. Comparison of these approaches revealed significant differences (P<0.0001) in transcript level profiles between the relative and absolute procedures for both target genes. When 18S rRNA was used as a reference, target gene expression was more similar to that of the absolute method than when beta-actin was used as a reference. Variability between the relative and absolute procedures occurred for a greater percentage of the embryonic stages compared to later developmental stages. This study indicates that the use of 18S rRNA and beta-actin for studying relative gene expression patterns in Kuruma shrimp embryonic, larval, post-larval and gonad samples will give significantly variable results, and illustrates the proposition that housekeeping genes are not necessarily appropriate references for real-time RT-PCR data normalization. Until suitable reference genes are characterized, gene expression experiments using the studied Kuruma shrimp tissues of different morphological developmental stages should use absolute quantification procedures.

Real-time RT-PCR quantification of Kuruma shrimp transcripts: a comparison of relative and absolute quantification procedures. Publishing Authors By Initials

MJ Sellars,T Vuocolo,LA Leeton,GJ Coman,BM Degnan,NP Preston,

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Real-time RT-PCR quantification of Kuruma shrimp transcripts: a comparison of relative and absolute quantification procedures. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of biotechnology

VOLUME: 129

Page Numbers: 391-9

Journal Abbreviation:

ISSN: 0168-1656

DAY: 9

MONTH: 02

YEAR: 2007

Real-time RT-PCR quantification of Kuruma shrimp transcripts: a comparison of relative and absolute quantification procedures. Information

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LANGUAGE: eng

NlmUniqueID: 8411927

Real-time RT-PCR quantification of Kuruma shrimp transcripts: a comparison of relative and absolute quantification procedures. Keywords Mesh Terms:

KEYWORDS: Reverse Transcriptase Polymerase Chain R

MESH TERMS: metabolism

Chemical & Substance for Abstract: Real-time RT-PCR quantification of Kuruma shrimp transcripts: a comparison of relative and absolute quantification procedures. Information

Substance Name: RNA, Ribosomal, 18S

Registry Number: 0

Grant and Affiliation Information for Real-time RT-PCR quantification of Kuruma shrimp transcripts: a comparison of relative and absolute quantification procedures.

AFFILIATION: CSIRO Food Futures National Research Flagship, Australia; CSIRO Marine and Atmospheric Research, 233 Middle Street, Cleveland, Qld 4163, Australia. Melony.Sellars@csiro.au

Country: Netherlands

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MEDLINETA: J Biotechnol

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