Ontology highlight
ABSTRACT:
PROVIDER: PRJNA560652 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR10009100_1.fastq.gz | Fastqsanger.gz | |||
| SRR10009100_2.fastq.gz | Fastqsanger.gz | |||
| SRR10009101_1.fastq.gz | Fastqsanger.gz | |||
| SRR10009101_2.fastq.gz | Fastqsanger.gz | |||
| SRR10009102_1.fastq.gz | Fastqsanger.gz |
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Project description:The excessive perchlorate utilization as an oxidizer in rocket propellants and blasting agents had led to the contamination of surface and ground waters. This chemical is known to compete with iodine for binding to the thyroid membrane receptors potentially causing hypothyroidism and fetal retardation in pregnant women. Nevertheless, to date, its biological effects are not completely understood. We have investigated the molecular mechanisms responsive to perchlorate in the nematode C. elegans to nominate a candidate gene for further peruse in the development of a C.elegans perchlorate biosensor. Perchlorate (1 mg/mL) affected the transcriptional response of Regulation of developmental process, growth, defense mechanisms and stress response, among other biological processes.
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Project description:If life exists on Mars, it would face several challenges including the presence of perchlorates, which destabilize biomacromolecules by inducing chaotropic stress. However, little is known about perchlorate toxicity for microorganism on the cellular level. Here we present a proteomic investigation on the perchlorate-specific stress responses of the halotolerant yeast Debaryomyces hansenii and compare these to generally known salt stress adaptations. We found that the responses to NaCl and NaClO4-induced stresses share many common metabolic features, e.g., signaling pathways, elevated energy metabolism, or osmolyte biosynthesis. However, several new perchlorate-specific stress responses could be identified, such as protein glycosylation and cell wall remodulations, presumably in order to stabilize protein structures and the cell envelope. These stress responses would also be relevant for life on Mars, which - given the environmental conditions - likely developed chaotropic defense strategies such as stabilized confirmations of biomacromolecules and the formation of cell clusters.
2023-06-06 | PXD033237 | Pride
Project description:Perchlorate, which is a ubiquitous and persistent ion, competitively interferes with iodide accumulation in the thyroid, causing iodine deficiency, which may result in reduced thyroid hormone synthesis and secretion. Human studies suggest that perchlorate presents very little risk in healthy individuals; however, the precautionary principle demands that the sensitive populations of iodine deficient adults and mothers require extra consideration. In an attempt to determine if the effects on gene expression were similar, we compared the thyroidal effects of perchlorate (10 mg/kg) treatment for 14 days in drinking water with those caused by 8 weeks of Iodine-deficiency in rats. The thyroids were collected (N=3 each group) and total mRNA was analyzed using the Affymetrix Rat Genome 230 2.0 GeneChip®. Changes in gene expression were compared with appropriate control groups. We compared the 2-fold gene changes due to I-deficiency with changes due to perchlorate treatment. 189 transcripts were changed by the Iodine-deficient diet and 722 transcripts were changed by the perchlorate treatment. 34% of the transcripts changed by the I-deficient diet were also changed by perchlorate and generally in the same direction. three specific transporter genes, AQP1, NIS, & SLC22A3 were changed by both treatments, indicating that the membrane specific changes were similar. Iodine-deficiency primarily caused changes in retinol and calcium signaling pathways and perchlorate primarily caused changes related to the accumulation of extracellular matrix proteins. This study provides evidence that perchlorate, at least at this dose level, changes more genes and changes different genes compared to iodine deficiency. Changes in gene expression due to I-deficiency compared to normal diet for 2 months. Changes in gene expression due to perchlorate in the drinking water compared to normal drinking water for 1 or 14 days. Feeding study in rats.
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