Predicting chemical bioavailability using microarray gene expression data and regression modeling: A tale of three explosive compounds.

Abstract:

BACKGROUND:Chemical bioavailability is an important dose metric in environmental risk assessment. Although many approaches have been used to evaluate bioavailability, not a single approach is free from limitations. Previously, we developed a new genomics-based approach that integrated microarray technology and regression modeling for predicting bioavailability (tissue residue) of explosives compounds in exposed earthworms. In the present study, we further compared 18 different regression models and performed variable selection simultaneously with parameter estimation. RESULTS:This refined approach was applied to both previously collected and newly acquired earthworm microarray gene expression datasets for three explosive compounds. Our results demonstrate that a prediction accuracy of R(2) = 0.71-0.82 was achievable at a relatively low model complexity with as few as 3-10 predictor genes per model. These results are much more encouraging than our previous ones. CONCLUSION:This study has demonstrated that our approach is promising for bioavailability measurement, which warrants further studies of mixed contamination scenarios in field settings.

journal_name

BMC Genomics

journal_title

BMC genomics

authors

Gong P,Nan X,Barker ND,Boyd RE,Chen Y,Wilkins DE,Johnson DR,Suedel BC,Perkins EJ

doi

10.1186/s12864-016-2541-5

subject

Has Abstract

pub_date

2016-03-08 00:00:00

pages

205

issn

1471-2164

pii

10.1186/s12864-016-2541-5

journal_volume

17

pub_type

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