PMID- 10440483 OWN - NLM STAT- MEDLINE DCOM- 19991014 LR - 20190921 IS - 0892-0362 (Print) IS - 0892-0362 (Linking) VI - 21 IP - 4 DP - 1999 Jul-Aug TI - Gestational stage-specific effects of retinoic acid exposure in the rat. PG - 393-402 AB - Although, or perhaps because, retinoids are among the earliest known behavioral teratogens, there is still little agreement about the behavioral effects of stage-specific exposure to these compounds. In these studies, pregnant albino rats were gavaged once daily with retinoic acid (RA) for 3 consecutive gestational days (GD), GD 8-10), GD 11-13, or GD 14-16. Dose levels were maximal levels compatible with survival (10, 2.5, or 12.5 mg/kg RA, over GD 8-10, 11-13, and 14-16, respectively). Two studies were conducted. The first assessed the effects of RA exposure on GD 8-10 or 14-16 on regional brain weight and on a large behavioral test battery. The second study assessed the effects of RA exposure on GD 11-13 or GD 14-16 on many of the same variables. Taken together with an earlier study of the behavioral effects of GD 11-13 RA exposure, these studies permit the following conclusions. 1) RA exposure at the above doses at any of the three exposure periods produced an apparent reduction in amphetamine-induced open field activity. 2) RA exposure on GD 14-16 but not earlier produced a robust, replicable rotarod deficit in exposed offspring. 3) RA exposure on GD 11-13, but not earlier or later, increased daytime activity in residential running wheels. 4) RA exposure on GD 11-13 or GD 14-16 but not GD 8-10 reduced weight of cerebellum. 5) No RA effect at any exposure period was seen on maze learning, activity in novel open fields, or on auditory startle. FAU - Holson, R R AU - Holson RR AD - Department of Psychology, New Mexico Tech, Socorro 87801, USA. rholson@nmt.edu FAU - Adams, J AU - Adams J FAU - Ferguson, S A AU - Ferguson SA LA - eng PT - Journal Article PL - United States TA - Neurotoxicol Teratol JT - Neurotoxicology and teratology JID - 8709538 RN - 0 (Dopamine Agents) RN - 0 (Teratogens) RN - 5688UTC01R (Tretinoin) RN - CK833KGX7E (Amphetamine) SB - IM MH - Amphetamine/pharmacology MH - Animals MH - Behavior, Animal/*drug effects MH - Body Weight/drug effects MH - Brain/*drug effects MH - Cerebellum/drug effects MH - Dopamine Agents/toxicity MH - Drug Interactions MH - Female MH - Fetus/*drug effects MH - *Gestational Age MH - Maternal-Fetal Exchange/drug effects MH - Maze Learning/drug effects MH - Organ Size/drug effects MH - Pregnancy MH - Pregnancy, Animal/*drug effects MH - Rats MH - Survival Rate MH - Teratogens/toxicity MH - Time Factors MH - Tretinoin/*toxicity EDAT- 1999/08/10 00:00 MHDA- 1999/08/10 00:01 CRDT- 1999/08/10 00:00 PHST- 1999/08/10 00:00 [pubmed] PHST- 1999/08/10 00:01 [medline] PHST- 1999/08/10 00:00 [entrez] AID - S0892-0362(99)00007-0 [pii] AID - 10.1016/s0892-0362(99)00007-0 [doi] PST - ppublish SO - Neurotoxicol Teratol. 1999 Jul-Aug;21(4):393-402. doi: 10.1016/s0892-0362(99)00007-0.