(a.) Resinlike, or resinform; resembling a resin without being such.
Example Sentences:
(1) They suggest that an endogenous retinoid could contribute to positional information in the early Xenopus embryo.
(2) However, until specific indications are firmly established through clinical trials, retinoid compounds cannot be routinely recommended.
(3) To clarify the mechanism by which retinoid causes cleft palate, we investigated the effect of retinoic acid (RA) on proliferation activity and glycosaminoglycan (GAG) synthesis in mouse fetuses palatal mesenchymal (MFPM) cells.
(4) As experimental findings indicated inhibitory action of aromatic retinoid on microtubule polymerisation and collagen metabolism of mesenchymal cells, we decided to treat 5 patients suffering from progressive systemic sclerosis as well as 3 patients with Sharp's syndrome with aromatic retinoid (Tigason).
(5) We have identified a synthetic retinoid with the characteristics of a selective RAR alpha antagonist.
(6) In rats fed the retinoid prior to cell wall injection, both the acute and the chronic responses were suppressed.
(7) The present study shows that retinoids are also potent inhibitors of gap junctional intercellular communication in SHE cells at noncytotoxic concentrations.
(8) The effect of several naturally-occurring retinoids and 13-cis-retinoic acid on the proliferation of cultured bovine retinal pigment epithelial (RPE) cells was investigated.
(9) However, the responses of adenoidal and tonsillar lymphocytes to Staphylococcus aureus Cowan strain A were not potentiated by retinoids.
(10) Of particular concern is the teratogenic effect of all retinoids, which limits their use in women of child-bearing potential.
(11) The requirement of vitamin A (retinoids) for vision has been recognized for decades.
(12) The addition of 4HPR to pooled human plasma at 37 degrees C in vitro did not reduce endogenous retinol levels, suggesting no direct chemical interaction between these 2 retinoids.
(13) Retinoids of the first and second generation, 13-cis-retinoic acid and etretinate, are capable of inducing secondary hyperlipoproteinemias.
(14) Both natural and synthetic retinoids may affect the eye, both on the surface epithelium and the visual metabolism.
(15) Two C(5)-azido substituted aromatic retinoids were evaluated as photoaffinity probes for studying the mechanism of retinoid action.
(16) These data support the hypothesis that one possible mechanism for the known antiinflammatory activity of some retinoids may be by inhibition of phospholipase A2.
(17) he comparative teratogenicity of nine retinoids in Wistar rats was investigated.
(18) Naturally occurring retinoids act as physiologic regulators of embryonal development and maintain the proper differentiation of many epithelial tissues in the adult.
(19) These effects were apparent by 8-12 h in culture and disappeared within 24 h after the withdrawal of retinoid compounds.
(20) After the medium was incubated at 37 degrees C for 48 h, 37-49% of the retinoid remained, whether or not tissue (neonatal Syrian hamster cheek pouch) was present, and irrespective of explant age.
Retinol
Definition:
(n.) A hydrocarbon oil obtained by the distillation of resin, -- used in printer's ink.
Example Sentences:
(1) The results indicate that CRALBP X 11-cis-retinol is sufficiently stereoselective in its binding properties to warrant consideration as a component of the mechanism for the generation of 11-cis-retinaldehyde in the dark.
(2) The methods discussed here are versatile procedures that have been effective for the quantification of retinoic acid and retinol in plasma or serum, cells in culture, and animal tissues.
(3) Pediatric) (280 micrograms retinol; 160 IU vitamin D; 2.8 mg tocopherol; 0.68 mg riboflavin) in a lipid emulsion, Intralipid.
(4) The first phase was induced by the action of retinol alone and not inhibited by TXA2 receptor antagonist.
(5) Carotenoids are absorbed and then partially converted to retinol in the enterocytes.
(6) The transport constant for specific retinol accumulation from RBP was 3.0 microM, suggesting that any change in the normal circulating retinol-RBP level (approximately 2 microM) would directly affect the rate of retinol accumulation.
(7) The enzyme xanthine oxidase is involved not only in the conversion of xanthine to uric acid but also in that of retinol to its more toxic metabolite, retinoic acid.
(8) With a bi-directional (up-down) gradient-elution technique both packings are useful for the determination of serum levels of carotenoids and retinol in serum extracts.
(9) Taken together, our results have demonstrated direct trophic effects of RA on spinal cord neurons and have suggested another role for astrocytes in the maintenance of normal neural physiology by regulating RA concentrations through the oxidation of retinol.
(10) Dialysed or heat-inactivated FBS or fatty-acid-free albumin was as effective as FBS in provoking ester hydrolysis and retinol release.
(11) Host response to nutritional therapy was monitored with plasma prealbumin and retinol-binding protein levels which did not change significantly in either group.
(12) These findings suggest that neither serum levels of selenium nor those of retinol have an appreciable effect on the risk of cancer.
(13) We measured parasitemia, mortality, serum retinol, liver retinol, spleen weight, and degree of xerophthalmia in vitamin A-deficient rats (A-), pair-fed control rats (A+PF), and ad libitum-fed control rats (A+AL) infected with Plasmodium berghei, a rodent malarial parasite.
(14) Among the identical residues there is one tryptophan at position 19 which is conserved in beta-lactoglobulins and is also found in the human retinol-binding protein at the corresponding position.
(15) Hence, the premature infant faces extrauterine adaptation with less total reserves of retinol than does the term infant.
(16) High maternal vitamin A intake results in high retinol transport to the fetus.
(17) Thus, the results of this study indicate that retinal is an obligatory intermediate in the hepatic production of retinoic acid from retinol and that cytosolic and microsomal retinol dehydrogenases play a key role in this process.
(18) This indicated either a higher degree of retinol metabolism or a sequestration of RA in the limb bud compared to the rest of the embryo at this stage of development.
(19) RA, which is one of the most active metabolites of retinol, is also present in low concentration in the blood and the RA rate formation varies from tissues depending on specific need of the cell.
(20) In conclusion, 17 of 23 children with persistent diarrhea had abnormal CIC results, significantly low serum retinol levels, and significantly high RDR results, although they had not yet manifested xerophthalmia.