Gambusia holbrooki
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ABSTRACT:
PROVIDER: PRJNA193337 | ENA |
REPOSITORIES: ENA
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Project description:Masculinized female Eastern Mosquitofish (Gambusia holbrooki) have resided downstream of paper mills in Florida since the 1980's. The potential impacts of this effluent on the mosquitofish endocrine system are unknown. The objective of this study was to evaluate gene expression patterns of endocrine system genes and global gene expression patterns in female G. holbrooki from a paper mill-impacted site. Masculinized female G. holbrooki were collected from a paper mill-impacted site (Fenholloway River) and from a reference site (Econfina River) and microarray analysis in livers was conducted. Hepatic microarray analysis revealed an increase in the expression of metabolic genes at the Fenholloway, with similarities in individual genes and biological processes compared to G. holbrooki exposed to androgens. These data indicate G. holbrooki from the Fenholloway may be impacted by a mixture of endocrine-active chemicals, including androgens.
2013-11-01 | GSE49238 | GEO
Project description:Evaluating the endocrine disrupting impacts of paper mill exposure on the Eastern Mosquitofish (Gambusia holbrooki) by gene expression analysis
| PRJNA213347 | ENA
Project description:Hepatic transcriptome analysis of male and female Eastern Mosquitofish (Gambusia holbrooki) exposed to a progestin and anti-progesterone reveals the mode of action of endocrine disruption of synthetic steroids in an aquatic organism
| PRJNA239818 | ENA
Project description:The Eastern Mosquitofish (Gambusia holbrooki) is a non-model species with the potential for development of biomarkers of endocrine disrutpting chemical (EDC) exposure due to its androgen-driven secondary sexual characteristics. While G. holbrooki have been utilized in the field as bioindicator organisms EDC exposure in areas impacted by pulp and paper mills, the lack of molecular tools and general understanding of how G. holbrooki are impacted by androgen exposure hinder the use of this organism as a widespread tool for the evaluation of these chemicals in the environment. While traditional gene-by-gene approaches have provided a list of genes that may be appropriate for developing into biomarkers of androgen exposure, a more inclusive method could provide more rapid and expansive determination of genes that can be developed into biomarkers of androgen exposure. The objective of this study is toutilize a mosquitofish microarray to determine potential biomarkers of chronic androgen exposure. The specific aim was to determine genes that may be developed into biomarkers of chronic androgen exposure in hepatic tissues using 17β-trenbolone (TB) exposed adult female G. holbrooki by microarray analysis.
2013-04-01 | GSE45261 | GEO
Project description:The Eastern Mosquitofish (Gambusia holbrooki) is a non-model species with the potential for development of biomarkers of endocrine disrutpting chemical (EDC) exposure due to its androgen-driven secondary sexual characteristics. While G. holbrooki have been utilized in the field as bioindicator organisms EDC exposure in areas impacted by pulp and paper mills, the lack of molecular tools and general understanding of how G. holbrooki are impacted by androgen exposure hinder the use of this organism as a widespread tool for the evaluation of these chemicals in the environment. While traditional gene-by-gene approaches have provided a list of genes that may be appropriate for developing into biomarkers of androgen exposure, a more inclusive method could provide more rapid and expansive determination of genes that can be developed into biomarkers of androgen exposure. The objective of this study is toutilize a mosquitofish microarray to determine potential biomarkers of chronic androgen exposure. The specific aim was to determine genes that may be developed into biomarkers of chronic androgen exposure in hepatic tissues using 17M-NM-2-trenbolone (TB) exposed adult female G. holbrooki by microarray analysis. Liver tissues from a 14-day exposure of female G. holbrooki to 1 M-BM-5g/L of the potent androgen receptor agonist 17M-NM-2-trenbolone (17M-NM-2-hydroxyestra-4,9,11-trien-3-one; abbreviated as TB) [Brockmeier 2013] were used as the first sample for microarray analysis using the custom G. holbrooki microarray to determine genes that were significantly up or down-regulated during a chronic androgen agonist exposure. RNA was isolated from the livers as previously described using TRIzol (Invitrogen, Grand Island, USA), hydrated using RNAsecure (Ambion, Grand Island, USA), and DNase treated using the Turbo DNA-free kit (Ambion, Grand Island, USA). Four oocyte-development stage-matched RNA samples per treatment were evaluated for RNA integrity using the 2100 BioAnalyzer (Agilent, Santa Clara, USA). The range of RIN values was 8.3-8.9.
2013-04-01 | E-GEOD-45261 | biostudies-arrayexpress
Project description:Masculinized female Eastern Mosquitofish (Gambusia holbrooki) have resided downstream of paper mills in Florida since the 1980's. The potential impacts of this effluent on the mosquitofish endocrine system are unknown. The objective of this study was to evaluate gene expression patterns of endocrine system genes and global gene expression patterns in female G. holbrooki from a paper mill-impacted site. Masculinized female G. holbrooki were collected from a paper mill-impacted site (Fenholloway River) and from a reference site (Econfina River) and microarray analysis in livers was conducted. Hepatic microarray analysis revealed an increase in the expression of metabolic genes at the Fenholloway, with similarities in individual genes and biological processes compared to G. holbrooki exposed to androgens. These data indicate G. holbrooki from the Fenholloway may be impacted by a mixture of endocrine-active chemicals, including androgens. During the summer of 2012, G. holbrooki were captured from one site downstream of the Buckeye Pulp and Paper Mill (Taylor County, Perry, FL, USA) on the Fenholloway River (GPS coordinates: N 30 058.341’, W 83 588.569’) and one site in the Econfina conservation area (GPS coordinates: N 30 08.549', W 83 51.962') . Only sexually mature G. holbrooki (females > 15cm standard length and with the presence of the gravid spot near the vent) were collected. A 1/8 mesh seine was used for sample collection. Female G. holbrooki were transferred to 5 gallon aerated buckets filled with site water and were processed at the site immediately after collection. Fish were anesthetized using Tricaine-S (Western Chemical, Ferndale, USA) and sacrificed via spinal transection. Oocyte development was assessed upon dissection and livers were removed and stored in RNAlater (Qiagen, Hilden, Germany) overnight at 4 C before storage at -80 C. RNA was isolated from the livers using TRIzol (Invitrogen, Grand Island, USA), hydrated using RNAsecure (Ambion, Grand Island, USA), and DNase treated using the Turbo DNA-free kit (Ambion, Grand Island, USA). Four oocyte-development stage-matched RNA samples per treatment were evaluated for RNA integrity using the 2100 BioAnalyzer (Agilent, Santa Clara, USA). The range of RIN values was 7.8-8.9.
2013-11-01 | E-GEOD-49238 | biostudies-arrayexpress
Project description:RAD-sequencing and pooled sequencing of male and female populations of Gambusia affinis and Gambusia holbrooki Raw sequence reads
| PRJNA563257 | ENA
Project description:Identifying targets of selection is key to understanding the evolution of sexually selected behavioral and morphological traits. Many animals have coercive mating, yet little is known about whether and how mate choice operates when these are the dominant mating tactic. Here, we use multivariate selection analysis to examine the direction and shape of selection on male insemination success in the mosquitofish (Gambusia holbrooki). We found direct selection on only one of five measured traits, but correlational selection involving all five traits. Larger males with longer gonopodia and with intermediate sperm counts were more likely to inseminate females than smaller males with shorter gonopodia and extreme sperm counts. Our results highlight the need to investigate sexual selection using a multivariate framework even in species that lack complex sexual signals. Further, female choice appears to be important in driving the evolution of male sexual traits in this species where sexual coercion is the dominant mating tactic.
| S-EPMC4662323 | biostudies-other