hypervitaminosis a/zea

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Introduction of late gestational teratogenesis in rat lung by hypervitaminosis A.

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Long-Evans black-hooded rats treated via stomach tube with 160,000 USP units of retinyl acetate (vitamin A) in 0.5 ml Mazola corn oil on gestational days 15--19 deliver normal-sized litters with significantly decreased viability. Vitamin A is known to effect the differentiation and to stimulate the

Craniofacial dysmorphogenesis following hypervitaminosis A in mice.

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Malformations of the temporomandibular joint (TMJ), zygomatic arch, middle ear ossicles, and mandibular musculature following hypervitaminosis A were described in fetal mice. Pregnant mice (Mus musculus) were each given a 0.2-ml solution of corn oil containing 10,000 IU of retinol palmitate by

Effects of maternal hypervitaminosis A on perinatal rat lung histology.

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Retinyl acetate (160,000 USP/day in corn oil) was administered orally to pregnant Long-Evans rats during the last third of gestation. Postnatal evaluation of this treatment was assessed by examination of histologic sections of lung taken from stillborns and from pups that survived several hours. In

Oxygen consumption and survival prediction in neonatal rats exposed to prenatal hypervitaminosis A.

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Fetal exposure to excess vitamin A results in a highly variable degree of lung pathology and high neonatal mortality in the Long-Evans rat. The present study evaluated O2 consumption in newborn of vitamin A-treated, vehicle-treated, and untreated pregnancies on five consecutive postnatal days

Protein-energy malnutrition increases teratogenicity of hypervitaminosis A in rats.

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The present study was designed to investigate the embryo-fetotoxicity of vitamin A in protein-energy malnourished animals. Retinyl palmitate (66, 99 and 132 mg/kg) suspended in corn oil was given by gavage to well-nourished and malnourished rats from gestational days 8 to 10 and cesarean sections

Preliminary toxicity profile of arotinoids SMR-2 and SMR-6 in male B6D2F1 mice.

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Arotinoids, which are analogs of retinoic acid (RA) and retinol (RO) with the carbon skeleton in a rigid conformation, have more favorable therapeutic indices relative to all-trans-RA and all-trans-RO. The purpose of this investigation was to obtain preliminary in vivo toxicity data on SMR-2(analog

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