Description
- Abstract:
- Testicular histology and semen parameters are considered the gold standards when determining male reproductive toxicity. Ethylene glycol monomethyl ether (EGME) is a testicular toxicant with well-described effects on histopathology and sperm parameters. To compare the predictivity and sensitivity of molecular biomarkers of testicular toxicity to the traditional endpoints, small RNAs in the sperm were analyzed by next generation RNA-sequencing (RNA-seq). Adult rats were exposed to 0, 50, 60, or 75 mg/kg EGME by oral gavage for 5 consecutive days. Testis histology, epididymal sperm motility, and sperm small RNAs, including microRNAs (miRNAs), mRNA fragments, piwi-interacting RNAs (piRNAs), and tRNA fragments (tRFs), were analyzed 5 weeks after cessation of exposure. Testicular histology showed a significant dose-dependent increase in retained spermatid heads (RSH), while sperm motility declined with increasing dose. RNA-sequencing of sperm small RNAs was used to identify significant dose-dependent changes in percent mRNA fragments (of total reads), percent miRNAs (of total reads), average tRF length, average piRNA length, and piRNA and tRF length-distributions. Discriminant analysis showed relatively low predictivity of exposure based on RSH or motility compared to the average read length of all assigned RNAs. Benchmark dose (BMD) modeling resulted in a BMD of 62 mg/kg using RSH, whereas average read length of all assigned RNAs resulted in a BMD of 47 mg/kg. These results showed that sperm small RNAs are sensitive and predictive biomarkers of EGME-induced male reproductive toxicity.
- Notes:
- This research is supported by the National Institute of Environmental Health Sciences (NIEHS) Superfund Research Program P42ES013660
Access Conditions
- Use and Reproduction
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- Attribution 4.0 International (CC BY 4.0)
Citation
Stermer, Angela R., Reyes, Gerardo, Hall, Susan J., et al.,
"Supplementary data from 'Small RNAs in Rat Sperm Are a Predictive and Sensitive Biomarker of Exposure to the Testicular Toxicant Ethylene Glycol Monomethyl Ether'"
(2019).
Brown University Open Data Collection, Brown Superfund Project 1: Molecular Biomarkers for Assessing Testicular Toxicity Digital Archive, Brown Superfund Data Products.
Brown Digital Repository. Brown University Library.
https://doi.org/10.26300/qchm-f041
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Brown University Open Data Collection
This collection contains open and public access data sets created by Brown University faculty and student researchers. Increasingly, publishers and funders are requiring that protocols, data sets, documentation and code underlying publications be retained and preserved in repositories, their locations …... -
Brown Superfund Project 1: Molecular Biomarkers for Assessing Testicular Toxicity Digital Archive
This archive is for the long-term preservation and public dissemination of data and digital research products collected and created by researchers associated with Brown University Superfund Research Program Project 1: "Molecular Biomarkers for Assessing Testicular Toxicity". Project Leader: Kim Boekelheide, …... -
Brown Superfund Data Products
This collection contains data sets, code, and documentation files associated with the Brown University Superfund Research Program's investigators and research projects....