Record Display for the EPA National Library Catalog

RECORD NUMBER: 6 OF 6

OLS Field Name OLS Field Data
Main Title Retinoic Acid Alters Epithelial Differentiation during Palaotogenesis.
Author Abbott, B. D. ; Pratt., R. M. ;
CORP Author National Inst. of Environmental Health Sciences, Research Triangle Park, NC.;Health Effects Research Lab., Research Triangle Park, NC.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-92/105;
Stock Number PB92-158617
Additional Subjects Tretinoin ; Cell differentiation ; Cleft palate ; Teratogenic compounds ; Epidermal growth factor-urogastrone ; Deoxyribonucleic acids ; Mice ; Isotretinoin ; Cell division ; Cell survival ; Phenotype ; Immunohistochemistry ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB92-158617 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 08/28/1992
Collation 12p
Abstract
Retinoids are teratogenic in humans and animals, producing a syndrome of craniofacial malformations that includes cleft palate. A study investigates the mechanism through which retinoic acid induces cleft palate. Murine palatogenesis after exposure to retinoic acid in utero is compared to normal development and to alterations observed after exposure in organ culture to retinoic acid or epidermal growth factor (EGF). Human embryonic palatal shelves were placed in the organ culture system and the responses to retinoic acid and EGF were compared to those of the murine palatal shelves. Growth factors play a role in normal development and are found in the embryonic palate. In other cell culture systems, retinoids alter the expression of EGF receptors. Study results suggest that in the medial epithelial cells of the palate, retinoic acid sustains the expression of the EGF receptor and the binding of EGF at a time when the expression in control medial cells has declined, and these control cells subsequently undergo programmed cell death. (Copyright (c) 1991 MUNKSGAARD.)