Your browser doesn't support javascript.
loading
Maternal exposure to ochratoxin A targets intermediate progenitor cells of hippocampal neurogenesis in rat offspring via cholinergic signal downregulation and oxidative stress responses.
Tanaka, Takeshi; Hasegawa-Baba, Yasuko; Watanabe, Yousuke; Mizukami, Sayaka; Kangawa, Yumi; Yoshida, Toshinori; Shibutani, Makoto.
Afiliación
  • Tanaka T; Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan; Pathogenetic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu-shi, Gifu 501-1193, Japan. Electronic address: t
  • Hasegawa-Baba Y; Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan. Electronic address: yhase@cc.tuat.ac.jp.
  • Watanabe Y; Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan; Pathogenetic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu-shi, Gifu 501-1193, Japan. Electronic address: y
  • Mizukami S; Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan; Pathogenetic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu-shi, Gifu 501-1193, Japan. Electronic address: s
  • Kangawa Y; Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan. Electronic address: kangawa_yumi@kaken.co.jp.
  • Yoshida T; Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan. Electronic address: yoshida7@cc.tuat.ac.jp.
  • Shibutani M; Laboratory of Veterinary Pathology, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan. Electronic address: mshibuta@cc.tuat.ac.jp.
Reprod Toxicol ; 65: 113-122, 2016 10.
Article en En | MEDLINE | ID: mdl-27346841
To elucidate the developmental exposure effects of ochratoxin A (OTA) on postnatal hippocampal neurogenesis, pregnant SD rats were provided a diet containing 0, 0.12, 0.6, or 3.0ppm OTA from gestation day 6 to day 21 on weaning after delivery. Offspring were maintained through postnatal day (PND) 77 without OTA exposure. At 3.0ppm, offspring of both sexes showed a transient body weight decrease after weaning. Changes in hippocampal neurogenesis-related parameters as measured in male PND 21 offspring were observed at 3.0ppm. In the subgranular zone (SGZ) of the dentate gyrus, PAX6+ or TBR2+ cells were decreased, while GFAP+ or DCX+ cells did not fluctuate in number, suggesting decreased numbers of type-2 progenitor cells. On the other hand, SGZ cells accumulating malondialdehyde increased. In the hilus of the dentate gyrus, SST+ or CHRNB2+ γ-aminobutyric acid (GABA)-ergic interneurons decreased, accompanied with transcript downregulation of Chrnb2 in the dentate gyrus. These results suggest that maternal exposure to OTA decreased type-2 progenitor cells by reducing hilar GABAergic interneurons innervating type-2 progenitor cells via cholinergic signal downregulation and also by increasing oxidative stress in the SGZ. Transcript levels of neurotrophin (Bdnf), glutamatergic receptors (Gria1, Gria2, and Grin2a), serotonin-synthesizing enzyme, and serotonergic receptors (Tph2, Htr1a, and Htr4) increased in the dentate gyrus, suggesting multiple neuroprotective actions against OTA-induced aberrant neurogenesis. All observed fluctuations were reversed by PND 77. The no-observed-adverse-effect level for offspring neurogenesis was determined to be 0.6ppm, corresponding to 39.3-76.0µg/kg body weight/day.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Efectos Tardíos de la Exposición Prenatal / Neurogénesis / Células-Madre Neurales / Hipocampo / Intercambio Materno-Fetal / Ocratoxinas Límite: Animals / Pregnancy Idioma: En Revista: Reprod Toxicol Asunto de la revista: EMBRIOLOGIA / MEDICINA REPRODUTIVA / TOXICOLOGIA Año: 2016 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Efectos Tardíos de la Exposición Prenatal / Neurogénesis / Células-Madre Neurales / Hipocampo / Intercambio Materno-Fetal / Ocratoxinas Límite: Animals / Pregnancy Idioma: En Revista: Reprod Toxicol Asunto de la revista: EMBRIOLOGIA / MEDICINA REPRODUTIVA / TOXICOLOGIA Año: 2016 Tipo del documento: Article Pais de publicación: Estados Unidos