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Retinoic acid (simplified nomenclature for all-trans-retinoic acid) is a metabolite of vitamin A 1 (all-trans-retinol) that is required for embryonic development, male fertility, regulation of bone growth and immune function. [2] All-trans-retinoic acid is required for chordate animal development, which includes all higher animals from fish to ...
Tretinoin, also known as all-trans retinoic acid (ATRA), is a medication used for the treatment of acne and acute promyelocytic leukemia. [ 8 ] [ 9 ] [ 10 ] For acne, it is applied to the skin as a cream, gel or ointment. [ 10 ]
Retinoic acid via the retinoic acid receptor influences the process of cell differentiation, hence, the growth and development of embryos. During development, there is a concentration gradient of retinoic acid along the anterior-posterior (head-tail) axis. Cells in the embryo respond to retinoic acid differently depending on the amount present.
First generation retinoids are produced naturally in the body and interact with their normal biological counterparts, such as retinol binding protein 4 for retinol, retinoid receptors for all-trans-retinoic acid or 9-cis-retinoic acid. [7] 13-cis retinoic acid has an unknown biological pathway but appears to act as a growth factor. [8]
The retinoic acid receptor (RAR) is a type of nuclear receptor which can also act as a ligand-activated transcription factor [1] that is activated by both all-trans retinoic acid and 9-cis retinoic acid, retinoid active derivatives of Vitamin A. [2] They are typically found within the nucleus. [3] There are three retinoic acid receptors (RAR ...
Retinoic acid syndrome (RAS) is a potentially life-threatening complication observed in people with acute promyelocytic leukemia (APML) and first thought to be specifically associated with all- trans retinoic acid (ATRA) (also known as tretinoin) treatment. [1] Subsequently, so-called RAS was recognized in APML patients who had been treated ...
As for the risks of too much RA during embryogenesis, the prescription drugs tretinoin (all-trans-retinoic acid) and isotretinoin (13-cis-retinoic acid), used orally or topically for acne treatment, are labeled with block-box warnings for pregnant women or women who may become pregnant, as they are known human teratogens. [31] [32]
Retinyl palmitate is used as a source of vitamin A added to low fat milk and other dairy products to replace the vitamin content lost through the removal of milk fat. Palmitate is attached to the alcohol form of vitamin A, retinol, in order to make vitamin A stable in milk. [citation needed] Retinyl palmitate is also a constituent of some ...