2020-11-06T14:24:04 n505

Molecular influences relating to the development and biomineralization of the chiton radula, Acanthopleura histosa. Series GSE20105

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Chitons are marine molluscs that posses a radula, a tongue like appendage containing many rows of microscopic teeth used for feeding. These teeth are hardened through the incorporation of biominerals. Since the original discovery of iron oxide and magnetite in these teeth, a wealth of chemical and structural knowledge has accumulated. The biomineralization process is known to be matrix mediated with precise control of the deposition of a number of different iron and calcium minerals at readily identifiable stages of tooth development. While much is known about the mechanisms of tooth mineralisation, there have been no studies undertaken to identify the genes that regulate this process. This investigation uses microarray technology to analyse the spatial expression of 493 expressed sequence tags (EST) derived from the radula sac of chiton, Acanthopleura hirtosa. A number of ESTs have been deemed significantly differentially expressed in relation to three designated areas of the radula sac. These spatial sections are defined by the variation in biomineral deposits of the radula, being immature radula which lacks any biomineral incorporation, iron deposition and calcium deposition. Additionally, foot muscle was used as a control to specify whether EST expression was specific to the radula and therefore likely involved biomineralization.
A total of twelve A. hirtosa specimens were collected and sacrificed for microarray hybridizations. The radulae were removed from each animal immediately following sacrifice and dissected into three sections based on the biomineralisation development of the radula teeth. These sections are termed immature teeth, iron deposited teeth, and calcium deposited teeth. An additional sample of A. hirtosa foot muscle was taken from each specimen. RNA was extracted individually from these sections. Extracted RNA samples across subjects were pooled equally within sections in order to minimize the impact of biological variation and maximize the number of individual samples included in the study. To this effect, four single channel hybridizations were conducted for each radula and muscle section each representing a pooled biological replicate containing equal proportions of RNA from three A. hirtosa individuals. A total of sixteen microarray hybridizations were conducted in this manner.
The file types include: SOFT formatted family files, MINiML formatted family files and Series Matrix Files (TXT).

Access rights

This data has been published in the Gene Expression Omnibus (GEO) a public functional genomics data repository supporting MIAME-compliant data submissions. Array- and sequence-based data are accepted. Tools are provided to help users query and download experiments and curated gene expression profiles.

Geographical area of data collection

153.552920,-26.777500 152.452799,-26.777500 152.452799,-28.037280 153.552920,-28.037280 153.552920,-26.777500

Research areas

Expressed sequence tags
Gene Expression (incl. Microarray and other genome-wide approaches)

Cite this collection

Gardner LD, Brooker L, Shaw J, Elizur A. (2010) Molecular influences relating to the development and biomineralization of the chiton radula, Acanthopleura histosa. Series GSE20105.[National Center for Biotechnology Information]
Gardner,Luke. (2014): Molecular influences relating to the development and biomineralization of the chiton radula, Acanthopleura histosa. Series GSE20105. [Queensland University of Technology]. https://doi.org/10.4225/09/586b332695399

Related information

Gene Expression Omnibus Metadata Record http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE20105
Related to BioProject PRJNA124235 http://www.ncbi.nlm.nih.gov/bioproject/PRJNA124235



Dates of data collection

From 2009-01-01 to 2010-01-29


Has association with


Name: Luke Gardner


Date record created:
Date record modified:
Record status:
Published - Open Access