retinoic acid/ضمور

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Levels of retinoic acid and retinaldehyde dehydrogenase expression in eyes of the Mitf-vit mouse model of retinal degeneration.

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OBJECTIVE Several reports have characterized the retinal degeneration observed in the Mitf(vit) mutant mouse. Despite these reports, the factor(s) that may cause or modulate the degeneration still are not well defined; however, it is known that the photoreceptors of Mitf(vit) mice die through an

Prospective study of common variants in the retinoic acid receptor-related orphan receptor α gene and risk of neovascular age-related macular degeneration.

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OBJECTIVE The retinoic acid receptor (RAR)-related orphan receptor α gene (RORA) is implicated as a candidate for age-related macular degeneration (AMD) through a previous microarray expression study, linkage data, biological plausibility, and 2 clinic-based cross-sectional studies. We aimed to

One-year results of a pilot study using oral 13-cis retinoic acid as a treatment for subfoveal predominantly occult choroidal neovascularization in patients with age-related macular degeneration.

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OBJECTIVE To evaluate the safety and evidence of efficacy for oral 13-cis retinoic acid as a treatment for patients with subfoveal occult choroidal neovascularization (CNV) due to age-related macular degeneration (ARMD). METHODS Patients with active, subfoveal occult CNV with no prior treatment of

High postnatal lethality and testis degeneration in retinoic acid receptor alpha mutant mice.

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Retinoic acid (RA) plays a critical role in normal development, growth, and maintenance of certain tissues. The action of RA is thought to be mediated in part by the three nuclear receptors (RAR alpha, -beta, and -gamma), each of which is expressed as multiple isoforms. To investigate the function

The specific binding of retinoic acid to RPE65 and approaches to the treatment of macular degeneration.

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RPE65 is essential in the operation of the visual cycle and functions as a chaperone for all-trans-retinyl esters, the substrates for isomerization in the visual cycle. RPE65 stereospecifically binds all-trans-retinyl esters with a K(D) of 47 nM. It is shown here by using a quantitative fluorescence

Topical all-trans-retinoic acid prevents corticosteroid-induced skin atrophy without abrogating the anti-inflammatory effect.

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We tested the ability of all-trans-retinoic acid to prevent corticosteroid-induced skin atrophy without lessening the anti-inflammatory effect of the steroids. Histologic study and skin-fold thickness in hairless mice treated topically with various steroids, followed by topical all-trans-retinoic

Concurrent application of tretinoin (retinoic acid) partially protects against corticosteroid-induced epidermal atrophy.

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Cutaneous atrophy arising from prolonged use of potent topical corticosteroids has long been a concern. Thus, it would be advantageous to find an agent which protects against atrophy produced by corticosteroids but at the same time does not impair their anti-inflammatory effects. Recent work shows

Retinoic Acid Induces Hyperactivity, and Blocking Its Receptor Unmasks Light Responses and Augments Vision in Retinal Degeneration.

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Light responses are initiated in photoreceptors, processed by interneurons, and synaptically transmitted to retinal ganglion cells (RGCs), which send information to the brain. Retinitis pigmentosa (RP) is a blinding disease caused by photoreceptor degeneration, depriving downstream neurons of

Excess Retinoic Acid Induces Fusion of Centra by Degenerating Intervertebral Ligament Cells in Japanese flounder, Paralichthys olivaceus.

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In marine aquaculture fish, excessive supplement of vitamin A (VA) to zooplanktons for larval culture and experimental exposure of larvae to retinoic acid (RA: active form of VA) have been known to cause vertebral deformity. However, the tissues in the developing vertebral column that are affected

Retinoic acid receptor stimulation protects midbrain dopaminergic neurons from inflammatory degeneration via BDNF-mediated signaling.

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Functions of retinoic acid receptors (RARs) in adult CNS have been poorly characterized. Here we investigated potential neuroprotective action of tamibarotene (Am80), an RARalpha/beta agonist available for the treatment of acute promyelocytic leukemia, on midbrain dopaminergic neurons. Am80

Retinoic Acid Receptor Beta in Pathophysiology of Age-Related Macular Degeneration.

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Potential functions of retinoic acid receptor A in Sertoli cells and germ cells during spermatogenesis.

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Elucidation of the retinoid signaling circuitry in the testis is critical to understanding how male germ cells develop to spermatozoa. Retinoic acid receptor A protein (RARA) is an essential mediator of retinoid signaling in the testis, as shown by a sterility phenotype observed for retinoic acid

Ligand-dependent regulation of retinoic acid receptor alpha in rat testis: in vivo response to depletion and repletion of vitamin A.

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Male animals are sterile due to testicular degeneration in the absence of retinoic acid (RA) or functional retinoic acid receptor-alpha (RAR alpha). This degeneration can be reversed by injecting retinol, a precursor of RA, into vitamin A-deficient (VAD) rats. To determine the relationship between

NRG1 and KITL Signal Downstream of Retinoic Acid in the Germline to Support Soma-Free Syncytial Growth of Differentiating Spermatogonia.

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Defined culture systems supporting spermatogonial differentiation will provide experimental platforms to study spermatogenesis. However, germline-intrinsic signaling mechanisms sufficient to support spermatogonial differentiation without somatic cells remain largely undefined. Here, we analyzed EGF

The retinoic acid-induced up-regulation of insulin-like growth factor 1 and 2 is associated with prolidase-dependent collagen synthesis in UVA-irradiated human dermal equivalents.

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BACKGROUND Ultraviolet (UV) A irradiation causes the degeneration of extracellular matrix in the skin dermis, mainly due to disrupted collagen homeostasis, resulting in the photo-aging of human skin. All-trans retinoic acid (ATRA) improves photo-aged human skin in vivo. OBJECTIVE Although the

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