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ABSTRACT: Chronic exposure to tire rubber-derived contaminant 6PPD-quinone impairs transcriptome in male mice testis

PROVIDER: PRJNA1068248 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27759056_1.fastq.gz	Fastqsanger.gz
	SRR27759056_2.fastq.gz	Fastqsanger.gz
	SRR27759057_1.fastq.gz	Fastqsanger.gz
	SRR27759057_2.fastq.gz	Fastqsanger.gz
	SRR27759058_1.fastq.gz	Fastqsanger.gz

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6PPD induces cerebrovascular defects by triggering oxidative stress and ferroptosis in zebrafish

Project description:N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD), which is widely used as an antiozonant in rubber tires, has recently got much attention for its acute aquatic toxicity. However, the developmental toxicity of 6PPD in cerebrovascular network remains unknown. Here, we investigated the effects of 6PPD exposure in cerebral vascular using the larvae of zebrafish. 6PPD would not affect the body length and shape of zebrafish larvae at the concentrations ranging from 20 μg/L to 1000 μg/L. 6PPD induced developmental defects in the brain in a concentration-dependent manner. The trunk vascular development would not be affected while the cerebrovascular network was disrupted upon 6PPD exposure. 6PPD would trigger excessive Reactive Oxygen Species (ROS) in the brain, indicating abnormal oxidative stress. Mechanistically, brain-specific transcriptome analysis showed that 6PPD could potentially cause the blockage of arachidonic acid (AA) metabolism-related genes and the upregulation of ferroptosis-related genes. Besides, treatment with ferroptosis inhibitor N-Acetyl-L-cysteine (NAC) attenuated oxidative damage and improved the construction of cerebrovascular network upon 6PPD exposure. Moreover, using a human vascular endothelial cell line, we further confirmed that 6PPD could trigger abnormal oxidative stress and defective expansion capacity, implying the conserved toxicity cross species. These findings are useful for the elucidation of toxicity underlying 6PPD in cerebrovascular systems of both zebrafish and humans.

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Gestational and lactational exposure to gossypol alters the testis transcriptome

Project description:Reproductive capacity can be altered by challenges experienced during critical periods of development, including fetal development and early neonatal life. Gossypol is a polyphenolic compound, commonly found in seeds of cotton plants, that impairs male reproduction. In this study, we investigated whether the exposure to gossypol in utero and during lactation alters testis development and testis gene expression in sheep.

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Project description:Mixture toxicity of 6PPD-quinone and polystyrene nanoplastics in zebrafish

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Impact of Bisphenol-A on the Spliceosome and Meiosis of Sperm in the Testis of Adolescent Mice

Project description:Background：Bisphenol-A (BPA) has estrogenic activity and adversely affects humans and animals' reproductive systems and functions. There has been a disagreement with the safety of BPA exposure at Tolerable daily intake (TDI) (0.05 mg/kg/d) value and non-observed adverse effect level (5 mg/kg/d). The current study investigated the effects of BPA exposure at various doses starting from Tolerable daily intake (0.05 mg/kg/d) to the lowest observed adverse effect level (50 mg/kg/d) on the testis development in male mice offspring. The BPA exposure lasted for 63 days from pregnancy day 0 of the dams to post-natal day (PND) 45 of the offspring. Results：The results showed that BPA exposure significantly increased testis and serum BPA contents of PND 45 mice. The spermatogenic cells became loose, and the lumen of seminiferous tubules enlarged when BPA exposure at 0.05 mg/kg/d TDI. BPA exposure at a low dose (0.05 mg/kg/d) significantly reduced the expression of Scp3 proteins and elevated sperm abnormality. The significant decrease in Scp3 suggested that BPA inhibits the transformation of spermatogonia into spermatozoa in the testis. The RNA-seq proved that the spliceosome was significantly inhibited in the testes of mice exposed to BPA. According to the RT-qPCR, BPA exposure significantly reduced the expression of Snrpc and Hnrnpu. Conclusions：This study indicated that long-term BPA exposure at Tolerable daily intake (0.05 mg/kg/d) is not safe because low-dose long-term exposure to BPA inhibits spermatogonial meiosis in mice testis impairs reproductive function in male offspring.

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