Genetic susceptibility in the neural tube defects induced by ochratoxin A in the genetic arhinencephaly mouse, Pdn/Pdn.
It is well known that ochratoxin A (OTA) induces neural tube defects (NTDs) in mice. In the present study, OTA was administered to the genetic polydactyly/arhinencephaly mouse (Pdn/Pdn) to investigate the synergistic effect between gene and environmental toxin. OTA treatment on day 7.5 of gestation increased NTDs in the Pdn/Pdn mouse. The responsible gene for Pdn/Pdn is Gli3. So, it was speculated that specific susceptibility for OTA in the Pdn/Pdn mouse embryo may be due to the severe depression of Gli3 gene expression. As correlated genes, Gli3, Shh and Fgf8 gene expressions were examined in the Pdn mouse embryo on day 9 of gestation after administration of OTA on day 7.5. No alteration of Shh expression was observed in the non-treated Pdn/Pdn, and OTA-treated +/+ and Pdn/Pdn. Fgf8 signal was observed at the anterior neural ridge (ANR) in the non-treated +/+, and that was elongated in the non-treated Pdn/Pdn, and further elongated and more intensive in the OTA-treated Pdn/Pdn. It was suggested that Fgf8 gene expression was affected by the depression of Gli3, and alteration of Fgf8 gene expression was accelerated by the toxicity of OTA in the Pdn/Pdn.
Ohta
Ken-ichi
K
School of Health Science, Faculty of Medicine, Tottori University, Yonago, Japan.
Maekawa
Mizuho
M
Katagiri
Ryu-ichi
R
Ueta
Etsuko
E
Naruse
Ichiro
I
D000015:Abnormalities, Multiple / Q000235:genetics*; D000818:Animals; D005260:Female; D051524:Fibroblast Growth Factor 8 / Q000235:genetics; D018507:Gene Expression Regulation, Developmental / Q000187:drug effects*; D020022:Genetic Predisposition to Disease; D053823:Hedgehog Proteins; D017403:In Situ Hybridization; D051741:Kruppel-Like Transcription Factors / Q000235:genetics; D008297:Male; D051379:Mice; D009419:Nerve Tissue Proteins / Q000235:genetics; D009436:Neural Tube Defects / Q000139:chemically induced* / Q000235:genetics; D009793:Ochratoxins / Q000633:toxicity*; D017689:Polydactyly / Q000235:genetics; D016133:Polymerase Chain Reaction; D011247:Pregnancy; D013577:Syndrome; D013723:Teratogens / Q000633:toxicity*; D015534:Trans-Activators / Q000235:genetics; D000074290:Zinc Finger Protein Gli3
C465571:Gli3 protein, mouse; D053823:Hedgehog Proteins; D051741:Kruppel-Like Transcription Factors; D009419:Nerve Tissue Proteins; D009793:Ochratoxins; C465570:Shh protein, mouse; D013723:Teratogens; D015534:Trans-Activators; D000074290:Zinc Finger Protein Gli3; D051524:Fibroblast Growth Factor 8; C025589:ochratoxin A