introduction: the purpose of this study was to evaluate the effect of different doses of retinoic acid on resumption of meiosis, in vitro maturation of oocytes and resulting embryo development in mice. materials and methods: germinal vesicle of nmri female mouse (6-8 weeks old) oocytes were collected from ovaries and cultured in maturation medium mem-α contained: 100 mliu/ml rfsh + 7.5 iu/ml hc...

Abbreviations : ATRA, all-trans-retinoic acid ; DTC, differentiated thyroid cancer ; FTC, follicular thyroid carcinoma ; NIS, Na/I symporter ; NF-kappaB, nuclear factor kappaB; RA, retinoic acid ; RAR, retinoic acid receptor ; RARE, retinoic acid response element ; RXR, retinoid X receptor ; TG, thyroglobuline ; TPO, thyroid peroxydase ; TSHR, thyroid stimulating hormone receptor ; PAX8, paired...

The metabolites of all-trans-[3H]retinoic acid appearing in the intestines of bile duct-cannulated rats were compared to those of similarly treated intact rats. 2.4% of administered radioactivity was found in the small intestines of bile duct-cannulated rats 2 H after dose, while a much larger proportion of the dose (7.2%) was found in the intestines of the intact rats. All-trans- and 3-cis-ret...

BACKGROUND Retinoic acid has antimitogenic effects on smooth muscle cells. Studies on the systemic circulation suggest that it may reduce vascular thickening. Relationships between retinoids and pulmonary hypertension/pulmonary vascular remodeling, however, have not been explored. Thus, the present study examined retinoid levels in plasma of patients with idiopathic pulmonary arterial hypertens...

UNLABELLED INTRODUCTION Pseudotumor cerebri secondary to all-trans retinoic acid in acute promyelocytic leukemia is a reported but rare complication of the therapy. Most cases improve following the discontinuation of all-trans retinoic acid. There is no published literature on how to manage such patients if severe symptoms of increased intracranial pressure continue after discontinuation of ...

Isotretinoin (13-cis-retinoic acid [13CRA], Accutane) is used for the treatment of dermatological diseases. Isotretinoin is, however, teratogenic in animals and humans. The mechanism of action of its teratogenicity is still not clearly identified. It has little or no binding properties to cytosolic retinoid-binding proteins or nuclear retinoid receptors (RAR, RXR). One hypothesis is that the te...

The pleiotropic effects of retinoids are mediated by two families of nuclear receptors: RAR (retinoic acid receptors) and RXR (retinoid X receptors). 9-cis-Retinoic acid is a specific ligand for RXR receptors, whereas either 9-cis- or all-trans-retinoic acid activates the RAR receptor family. The existence of RXRs suggests a new role for isomerization in the biology of retinoic acid. We report ...