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Your Environment. Your Health.

Boston University: Dataset Details, ID=E-GEOD-25245

Superfund Research Program

The Long-term Impacts of Early Life Exposure to Superfund Chemicals in Humans and Wildlife

Center Director: David H. Sherr
Grant Number: P42ES007381
Funding Period: 1995-2020
View this project in the NIH Research Portfolio Online Reporting Tools (RePORT)

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Title: Transcriptomic assessment of resistance to effects of an aryl hydrocarbon receptor (AHR) agonist in embryos of Atlantic killifish (Fundulus heteroclitus) from a marine Superfund site

Accession Number: E-GEOD-25245

Link to Dataset:

Repository: ArrayExpress

Data Type(s): Gene Expression

Experiment Type(s): Transcription profiling by array

Organism(s): Fundulus heteroclitus

Summary: This study presents statistical analyses of gene expression in 5, 10 and 15 day post-fertilization (dpf) embryos of the teleost Fundulus heteroclitus treated with control vehicle (DMSO) or a potent non-ortho-PCB (PCB-126; 3,3 ,4,4 ,5-pentachlorobiphenyl). The embryos were from two populations: a clean, reference population (SC, Scorton Creek, MA USA) and a polluted Superfund population (N, New Bedford Harbor, MA USA). For each site, eggs from 8 females (~1100 total) were fertilized using minced testes from 5 males. After non-fertile eggs were culled, embryos were exposed to vehicle (DMSO; 0.1 ) or PCB-126 (50 nM) in filtered seawater (salinity 25 part per thousand, 65 embros per 20 ml in glass petri dish) for 4 hr at 20 C. After exposure, the embryos were washed in filtered seawater and incubated at 20 C under a 14-h light, 10-h dark cycle. At 5-, 10-, and 15-dpf, embryos were collected as three pools of 20 embryos from each treatment group and flash frozen in liquid nitrogen and stored at -80 C until used for RNA isolation. A loop design was used for the microarray hybridizations where each sample is hybridized to 2 arrays using both Cy3 and Cy5 labeled fluorophores. We used three loops in which each loop consisted of Cy3- and Cy5-labeled embryo aRNAs from 12 samples: one sample from each population-treatment-time combination. Within a population-treatment-time, embryos were randomly assigned to one of the three loops. In total, 36 embryos were hybridized to 36 microarrays. The loops formed were SC5C SC5P NBH5C NBH5P SC10C SC10P NBH10C NBH10P SC15C SC15P NBH15C NBH15P SC5C, where each arrow represents a separate hybridization (array) with the biological sample at the base of the arrow labeled with Cy3 and the biological sample at the head of the arrow labeled with Cy5. SC represents the Scorton Creek, Sandwich, MA population (reference), NBH represents the New Bedford Harbor, MA population, C represents control dose (DMSO), P represents the PCB-126 dose, 5 represents 5 dpf, 10 represents 10 dpf and 15 represents 15 dpf.

Publication(s) associated with this dataset:
  • Oleksiak MF, Karchner SI, Jenny MJ, Franks DG, Mark Welch DB, Hahn ME. 2011. Transcriptomic assessment of resistance to effects of an aryl hydrocarbon receptor (AHR) agonist in embryos of Atlantic killifish (Fundulus heteroclitus) from a marine Superfund site. BMC Genomics 12:263. doi:10.1186/1471-2164-12-263 PMID:21609454 PMCID:PMC3213123
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