{"database": "metadata", "table": "run_metadata", "rows": [[25414, "SRR25868952", "SRX21590453", "SRS18768029", "SRP457982", "PRJNA1011844", "Comparison of zebrafish toxicity among different developmental windows of exposure to three environmentally relevant PFAS compounds", "PRJNA1011844", "Other", "The per and polyfluoroalkyl substances PFAS are of significant global concern due to their highly ubiquitous and persistent nature  bioaccumulation in organisms  and potential toxicity. The aquatic environment is known as an important sink for PFAS resulting in high concentrations in aquatic organisms. However  little is known about the developmental windows of sensitivity in which the PFAS chemicals are biologically active  in addition to the toxicity endpoints that best reflect chemical hazard. In this study  zebrafish Danio rerio were exposed to a 0.33% DMSO vehicle control  1uM chlorpyrifos CAS 2921 88 2 positive control  and eight concentrations 0 100 uM  half log dilutions of three environmentally relevant PFAS compounds in concentration response: PFOS CAS 1763 21 1  PFOA CAS 45285 51 6  and PFHxS CAS 355 46 4. There was also a group of unexposed zebrafish aliquoted from a single pool into all exposure plates to serve as a quality assurance measure. The goal of this study was to generate transcriptomic point of departure tPOD; a benchmark dose/concentration  based treatment level below which a concerted gene expression response is not observed estimates for zebrafish exposed to PFAS compounds as a health protective exposure level for risk assessment. Through the use of short term embryo/larval plate based high throughput toxicity tests  tPODs were determined across seven distinct developmental windows 6 hpf 24 hpf  6 hpf 48 hpf  24 hpf 48 hpf  6 hpf 120 hpf  24 hpf 120 hpf  48 hpf 120 hpf  96 hpf 120 hpf to assess how common experimental design variables e.g.  different exposure durations  exposure at different developmental stages affect point of departure estimates.", null, null, null, null, "T3Hg2", null, "strain:AB wild type|age:24 48hpf|dev stage:embryo|collection date:2022|geo loc name:USA: Minnesota  Duluth|sex:not applicable|tissue:whole body zebrafish embryo|biomaterial provider:US EPA Great Lakes Toxicology & Ecology Division  6201 Congdon Blvd  Duluth  MN 56036|breeding method:Adult zebrafish AB wild type strain were housed in an onsite culture facility at the US Environmental Protection Agency USEPA laboratory in Duluth  MN. The fish were raised in a flow through system with control UV treated  filtered Lake Superior water LSW at a flow rate of 250 mL/minute. Fish were held at 26 \u00b1 1\u00b0C under a 16/8 hour light/dark photoperiod cycle. Fish were housed in 5.5 gallon tanks with <100 zebrafish per tank. Adult fish were fed live brine shrimp Artemia nauplii twice daily. The night prior  breeding zebrafish in groups of 4 males x 6 females were separated into breeding tanks containing a plastic screened spawning basket. The next morning  approximately 2 hours post the lights turned on  embryos were collected and maintained in filtered LSW in an incubator set at 28.5\u00b0C. At approximately 4 hpf  zebrafish embryos were screened under a stereo microscope  and only similarly staged embryos were sorted out for chemical exposure. All dead  malformed  and unfertilized eggs were discarded.|collected by:Great Lakes Toxicology & Ecology Division|sample type:Total RNA|time code:3|dose:49.49145359392848|dose units:ug/L|treatment:PFHxS CAS 355 46 4|replicate ID:rep2|repeat sample:No|BioSampleModel:Model organism or animal", null, null, null, null, null, null, null, null, "RNA Seq of danio rerio: whole organism embryo PFHxS CAS 355 46 4", "T3Hg2 S84", "T3Hg2 S84", "At the end of each PFAS exposure period  zebrafih embryos were homogenized in Qiagen buffer RLT and betamercaptoethanol  then frozen. RNA was isolated with Ambion MagMAX 96 Total RNA Isolation kit. Samples were transferred to 0.5 mL Eppendorf tubes in prepration for RNA Seq library prepation. RNA was normalized to 6 ng/uL using epMotion 5075. Illumina compatible Lexogen CORALL RNA Seq libraries were then prepared for RNA sequencing. Library pools were quality checked and quantified using a combination of Qubit dsDNA HS  Agilent 4200 TapeStation HS DNA1000 and Invitrogen Collibri Library Quantification qPCR assays by the Michigan State University RTSF Genomics Core. Each pool was loaded onto 1 lane of a NovaSeq S4 flow cell. Sequencing was performed by Michigan State University in a 2x150bp paired end format using a NovaSeq 6000 v1.5 300 cycle reagent kit. Base calling was done by Illumina Real Time Analysis RTA v3.4.4 and output of RTA was demultiplexed and converted to FastQ format with Illumina Bcl2fastq v2.20.0.", null, null, "RNA-Seq", "TRANSCRIPTOMIC", "cDNA", "PAIRED", "ILLUMINA", "Illumina NovaSeq 6000", null, "SRP457982", null, null, "T3Hg2_S84_L001_R1_001.fastq.gz T3Hg2_S84_L001_R2_001.fastq.gz", "fastq fastq", 5953142100.0, 19843807.0, "T3Hg2 S84 L001 R1 001.fastq.gz", "0:150 1:150", "A:1547844763;C:1353300917;G:1546150907;T:1505715498;N:130015", 150, 150, null, null, 1547844763, 1353300917, 1546150907, 1505715498, 130015, "SRX21590453", "SRS18768029", "SRA1703738", "U.S. Environmental Protection Agency|Great Lakes Toxicology and Ecology Division", "U.S. Environmental Protection Agency", 2, 0.63035, 0.64008, 0.07369, 0.07592, 0.73438, 0.73413, 0.45946, 0.46548, 150, 150, "B", "B", "biological fallback assumption", "illumina", "novaseq_era", "unknown", "cdna_unspecified", "lexogen", "bulk", "unknown", "unknown", null, "United States", "2023-09-01", "Hatching", "Embryo", "Trunk", "Surface Structure"]], "columns": ["rowid", "run.accession", "experiment.accession", "sample.accession", "study.accession", "bioproject", "study.title", "study.alias", "study.type", "study.abstract", "study.attributes", "study.PMIDs", "sample.description", "sample.title", "sample.alias", "sample.centername", "sample.attributes", "GEOsample.title", "GEOsample.dataprocessing", "GEOsample.source", "GEOsample.treatmentprotocol", "GEOsample.extractprotocol", "GEOsample.growthprotocol", "GEOsample.characteristics", "GEOsample.accession", "experiment.title", "experiment.alias", "experiment.library_name", "experiment.design_description", "experiment.library_construction_protocol", "experiment.attributes", "experiment.library_strategy", "experiment.library_source", "experiment.library_selection", "experiment.library_layout", "experiment.platform", "experiment.instrument_model", "experiment.spot_descriptor", "experiment.study_ref", "run.title", "run.attributes", "run.filename", "run.semantic_name", "run.total_bases", "run.total_spots", "run.alias", "run.read_lengths", "run.base_counts", "run.r1_length", "run.r2_length", "run.r3_length", "run.r4_length", "run.Acount", "run.Ccount", "run.Gcount", "run.Tcount", "run.Ncount", "run.experiment", "run.pool_member", "submission.accession", "submission.srasource", "submission.bioprojectsource", "seqdetective.n_mates", "seqdetective.mapping_rate.mate1", "seqdetective.mapping_rate.mate2", "seqdetective.nofeature_rate.mate1", "seqdetective.nofeature_rate.mate2", "seqdetective.sparsity.mate1", "seqdetective.sparsity.mate2", "seqdetective.pos_strand_rate.mate1", "seqdetective.pos_strand_rate.mate2", "seqdetective.readlen.mate1", "seqdetective.readlen.mate2", "seqdetective.judgement.mate1", "seqdetective.judgement.mate2", "seqdetective.judgement.reason", "platform_family", "instrument_generation", "read_bias", "selection_class", "prep_kit", "sc_or_bulk", "tech_class", "technology", "tech_variant", "submission.bioprojectsource.country", "earliest_date", "devstage_curation", "devstage_curation_coarse", "tissue_curation", "tissue_curation_coarse"], "primary_keys": ["rowid"], "primary_key_values": ["25414"], "units": {}, "query_ms": 10.034997001639567}