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Artículo

Demasculinization and feminization of male gonads by atrazine: Consistent effects across vertebrate classes

Hayes, Tyrone B.; Anderson, Lloyd L.; Beasley, Val R.; de Solla, Shane R.; Iguchi, Taisen; Ingraham, Holly; Kestemont, Patrick; Kniewald, Jasna; Kniewald, Zlatko; Langlois, Valerie; Luque, Enrique HugoIcon ; McCoy, Krista A.; Muñoz de Toro, Monica Milagros; Oka, Tomohiro; Oliveira, Cleida A; Orton, Frances; Ruby, Sylvia; Suzawa, Miyuki; Tavera Mendoza, Luz E.; Trudeau, Vance L.; Victor Costa, Anna Bolivar; Willingham, Emily
Fecha de publicación: 10/2011
Editorial: Pergamon-Elsevier Science Ltd
Revista: Journal of Steroid Biochemistry and Molecular Biology
ISSN: 0960-0760
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias de la Salud

Resumen

Atrazine is the most commonly detected pesticide contaminant of ground water, surface water, and precipitation. Atrazine is also an endocrine disruptor that, among other effects, alters male reproductive tissues when animals are exposed during development. Here, we apply the nine so-called "Hill criteria" (Strength, Consistency, Specificity, Temporality, Biological Gradient, Plausibility, Coherence, Experiment, and Analogy) for establishing cause-effect relationships to examine the evidence for atrazine as an endocrine disruptor that demasculinizes and feminizes the gonads of male vertebrates. We present experimental evidence that the effects of atrazine on male development are consistent across all vertebrate classes examined and we present a state of the art summary of the mechanisms by which atrazine acts as an endocrine disruptor to produce these effects. Atrazine demasculinizes male gonads producing testicular lesions associated with reduced germ cell numbers in teleost fish, amphibians, reptiles, and mammals, and induces partial and/or complete feminization in fish, amphibians, and reptiles. These effects are strong (statistically significant), consistent across vertebrate classes, and specific. Reductions in androgen levels and the induction of estrogen synthesis - demonstrated in fish, amphibians, reptiles, and mammals - represent plausible and coherent mechanisms that explain these effects. Biological gradients are observed in several of the cited studies, although threshold doses and patterns vary among species. Given that the effects on the male gonads described in all of these experimental studies occurred only after atrazine exposure, temporality is also met here. Thus the case for atrazine as an endocrine disruptor that demasculinizes and feminizes male vertebrates meets all nine of the "Hill criteria".
Palabras clave: ATRAZINE , ENDOCRINE DISRUPTOR , GONADS
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/97329
DOI: https://doi.org/10.1016/j.jsbmb.2011.03.015
URL: https://www.sciencedirect.com/science/article/pii/S0960076011000665
Colecciones
Articulos(CCT - SANTA FE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Citación
Hayes, Tyrone B.; Anderson, Lloyd L.; Beasley, Val R.; de Solla, Shane R.; Iguchi, Taisen; et al.; Demasculinization and feminization of male gonads by atrazine: Consistent effects across vertebrate classes; Pergamon-Elsevier Science Ltd; Journal of Steroid Biochemistry and Molecular Biology; 127; 1-2; 10-2011; 64-73
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