Tags

Type your tag names separated by a space and hit enter

Subchronic sodium chlorate exposure in drinking water results in a concentration-dependent increase in rat thyroid follicular cell hyperplasia.
Toxicol Pathol. 2001 Mar-Apr; 29(2):250-9.TP

Abstract

Chlorine dioxide (ClO2) is an effective drinking water disinfectant, but sodium chlorate (NaClO3) has been identified as a potentially harmful disinfection by-product. Studies were performed to describe the development of thyroid lesions in animals exposed to NaClO3 in the drinking water. Male and female F344 rats and B6C3F1 mice were exposed to 0, 0.125, 0.25, 0.5, 1.0, or 2.0 g/L NaClO3 for 21 days. Additional male F344 rats were exposed to 0, 0.001. 0.01. 0.1, 1.0. or 2.0 g/L NaClO3 for 90 days. Female F344 rats were exposed to 0, 0.5, 1.0, 2.0, 4.0, or 6.0 g/L of NaClO3 for 105 days. Thyroid tissues were processed by routine methods for light microscopic examination, and follicular cell hyperplasia was diagnosed using a novel method. Thyroid hormone levels were altered significantly after 4 and 21 days. NaClO, treatment induced a concentration-dependent increase in the incidence and severity of thyroid follicular cell hyperplasia. Male rats are more sensitive to the effects of NaClO3 treatment than females. Follicular cell hyperplasia was not present in male or female B6C3F1 mice. These data can be used to estimate the human health risk that would be associated with using ClO2, rather than chlorine, to disinfect drinking water.

Authors+Show Affiliations

Environmental Carcinogenesis Division, US Environmental Protection Agency, Research Triangle Park, North Carolina 27711, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

11421493

Citation

Hooth, M J., et al. "Subchronic Sodium Chlorate Exposure in Drinking Water Results in a Concentration-dependent Increase in Rat Thyroid Follicular Cell Hyperplasia." Toxicologic Pathology, vol. 29, no. 2, 2001, pp. 250-9.
Hooth MJ, Deangelo AB, George MH, et al. Subchronic sodium chlorate exposure in drinking water results in a concentration-dependent increase in rat thyroid follicular cell hyperplasia. Toxicol Pathol. 2001;29(2):250-9.
Hooth, M. J., Deangelo, A. B., George, M. H., Gaillard, E. T., Travlos, G. S., Boorman, G. A., & Wolf, D. C. (2001). Subchronic sodium chlorate exposure in drinking water results in a concentration-dependent increase in rat thyroid follicular cell hyperplasia. Toxicologic Pathology, 29(2), 250-9.
Hooth MJ, et al. Subchronic Sodium Chlorate Exposure in Drinking Water Results in a Concentration-dependent Increase in Rat Thyroid Follicular Cell Hyperplasia. Toxicol Pathol. 2001 Mar-Apr;29(2):250-9. PubMed PMID: 11421493.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Subchronic sodium chlorate exposure in drinking water results in a concentration-dependent increase in rat thyroid follicular cell hyperplasia. AU - Hooth,M J, AU - Deangelo,A B, AU - George,M H, AU - Gaillard,E T, AU - Travlos,G S, AU - Boorman,G A, AU - Wolf,D C, PY - 2001/6/26/pubmed PY - 2002/1/5/medline PY - 2001/6/26/entrez SP - 250 EP - 9 JF - Toxicologic pathology JO - Toxicol Pathol VL - 29 IS - 2 N2 - Chlorine dioxide (ClO2) is an effective drinking water disinfectant, but sodium chlorate (NaClO3) has been identified as a potentially harmful disinfection by-product. Studies were performed to describe the development of thyroid lesions in animals exposed to NaClO3 in the drinking water. Male and female F344 rats and B6C3F1 mice were exposed to 0, 0.125, 0.25, 0.5, 1.0, or 2.0 g/L NaClO3 for 21 days. Additional male F344 rats were exposed to 0, 0.001. 0.01. 0.1, 1.0. or 2.0 g/L NaClO3 for 90 days. Female F344 rats were exposed to 0, 0.5, 1.0, 2.0, 4.0, or 6.0 g/L of NaClO3 for 105 days. Thyroid tissues were processed by routine methods for light microscopic examination, and follicular cell hyperplasia was diagnosed using a novel method. Thyroid hormone levels were altered significantly after 4 and 21 days. NaClO, treatment induced a concentration-dependent increase in the incidence and severity of thyroid follicular cell hyperplasia. Male rats are more sensitive to the effects of NaClO3 treatment than females. Follicular cell hyperplasia was not present in male or female B6C3F1 mice. These data can be used to estimate the human health risk that would be associated with using ClO2, rather than chlorine, to disinfect drinking water. SN - 0192-6233 UR - https://www.unboundmedicine.com/medline/citation/11421493/Subchronic_sodium_chlorate_exposure_in_drinking_water_results_in_a_concentration_dependent_increase_in_rat_thyroid_follicular_cell_hyperplasia_ L2 - https://journals.sagepub.com/doi/10.1080/019262301317052530?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -