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Titolo:
Environmental toxicant effects on neuroendocrine function
Autore:
Gore, AC;
Indirizzi:
Mt Sinai Sch Med, Kastor Neurobiol Aging Labs, Fishberg Res Ctr Neurobiol,New York, NY 10029 USA Mt Sinai Sch Med New York NY USA 10029 r Neurobiol,New York, NY 10029 USA Mt Sinai Sch Med, Schwartz Dept Geriatr & Adult Dev, New York, NY 10029 USA Mt Sinai Sch Med New York NY USA 10029 Adult Dev, New York, NY 10029 USA
Titolo Testata:
ENDOCRINE
fascicolo: 2, volume: 14, anno: 2001,
pagine: 235 - 246
SICI:
1355-008X(200103)14:2<235:ETEONF>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
GONADOTROPIN-RELEASING-HORMONE; FEMALE RHESUS-MONKEY; MESSENGER-RIBONUCLEIC-ACID; GNRH GENE-EXPRESSION; POLYCHLORINATED-BIPHENYLS; IN-VITRO; REPRODUCTIVE-TRACT; MACACA-MULATTA; GROWTH-FACTOR; GT1-7 CELLS;
Keywords:
gonadotropin-releasing hormone; puberty; reproduction; chlorpyrifos; methoxychlor; PCB;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
100
Recensione:
Indirizzi per estratti:
Indirizzo: Gore, AC Mt Sinai Sch Med, Kastor Neurobiol Aging Labs, Fishberg Res Ctr Neurobiol,Box 1639, New York, NY 10029 USA Mt Sinai Sch Med Box 1639 New York NY USA 10029 ork, NY 10029 USA
Citazione:
A.C. Gore, "Environmental toxicant effects on neuroendocrine function", ENDOCRINE, 14(2), 2001, pp. 235-246

Abstract

Exposure to environmental toxicants can have profound effects on normal growth and development. However, the mechanisms by which these toxicants exert these effects are not well understood. Many environmental toxicants alterreproductive function and have effects on the central nervous system and behavior, yet the link between these reproductive and neurologic phenomena has not been systematically investigated. The neuroendocrine (hypothalamic-pituitary-gonadal) axis, which integrates inputs to and outputs from the nervous and reproductive systems, is functionally and anatomically situated tomediate effects of environmental toxicants, particularly those that are endocrine-disrupting chemicals (EDCs), on developmental processes. This article reviews the current literature on EDC effects on the neuroendocrine system, particularly at the level of hypothalamic gonadotropin-releasing hormone (GnRH) neurons, the key cells involved in the regulation of reproductive function. The focus of this article is on two polychlorinated biphenyl mixtures (Aroclor 1221, Aroclor 1254) and two organochlorine pesticides (methoxychlor and chlorpyrifos). Some experimental data are presented for each of the four urban environmental toxicants on GnRH cells in vitro and in vivo. The results of in vitro experiments indicate that all four of the toxicantsprofoundly affect hypothalamic GnRH gene expression, cell survival, and neurite outgrowth, demonstrating direct effects of EDCs on a GnRH cell line. In in vivo experiments, three of the toxicants (Aroclor 1221,methoxychlor, and chlorpyrifos) caused significant alterations in GnRH mRNA levels in female rats. Both the in vitro and in vivo findings support the novel concept of chlorpyrifos as an EDC. The results, taken together with the literature,support the hypothesis that the neuroendocrine axis, and specifically GnRHneurons, are sensitive to urban environmental toxicants, and that reproductive and neurologic effects of EDCs may be mediated at this level of the hypothalamic-pituitary-gonadal axis.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/10/20 alle ore 00:25:19