{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,10]],"date-time":"2025-09-10T21:49:02Z","timestamp":1757540942145},"reference-count":43,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2005,5,31]],"date-time":"2005-05-31T00:00:00Z","timestamp":1117497600000},"content-version":"vor","delay-in-days":6269,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Teratology"],"published-print":{"date-parts":[[1988,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The splotch gene (<jats:italic>Sp<\/jats:italic>) and all\u2010trans retinoic acid (RA) interact to cause spina bifida in mouse embryos. To investigate the mechanisms of action of the two, the spinal regions of <jats:italic>Sp<\/jats:italic> homozygotes, RA\u2010treated wild\u2010type, and control wild\u2010type embryos were examined histologically by light microscopy on day 9 of gestation. The mean numbers of cells per section in the neural tube, mesoderm, and notochord were determined, along with the percentages of mitotic and pyknotic nuclei and the numbers of migrating neural crest cells. As well, the effect of <jats:italic>Sp<\/jats:italic> and RA on the extracellular matrix was studied histochemically with Alcian blue staining for glycosaminoglycans. The main defect in <jats:italic>Sp<\/jats:italic> homozygotes was a marked reduction in the number of migrating neural crest cells and the amount of extracellular matrix around the neural tube. Retinoic acid, on the other hand, caused a number of disruptions in the embryo, including abnormalities in the position of the notochord and the shape of the neural tube. <jats:italic>Sp<\/jats:italic> and RA delay neural tube closure and thus cause neural tube defects, through different mechanisms. However, the combined effects of the gene and teratogen on the embryo lead to a greater inhibition of neural tube closure than when either is present separately.<\/jats:p>","DOI":"10.1002\/tera.1420370412","type":"journal-article","created":{"date-parts":[[2005,6,11]],"date-time":"2005-06-11T15:07:32Z","timestamp":1118502452000},"page":"389-399","source":"Crossref","is-referenced-by-count":31,"title":["Histological comparison of the effects of the splotch gene and retinoic acid on the closure of the mouse neural tube"],"prefix":"10.1002","volume":"37","author":[{"given":"Carolyn M.","family":"Kapron\u2010Br\u00e1s","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daphne G.","family":"Trasler","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,5,31]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/jez.1401270206"},{"key":"e_1_2_1_3_1","first-page":"155","volume-title":"The Biological Basis of Reproductive and Developmental Medicine","author":"Copp A. 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