Hormonal Tretinoin

Retinoids. The term retinoid refers to retinol or other closely related derivatives, either natural or synthetic. Retinoids may or may not have retinol-like (vitamin A-like) activity. Retinoids affect epithelial cells by binding to receptors inside these cells, inducing alterations in the transcription of genes. Retinoids enhance the synthesis of some proteins, such as proteins that serve as receptors for certain hormones and growth factors, and reduce the synthesis of others. Some of the most commonly prescribed treatments for acne—tretinoin, isotretinoin, and adapalene—are retinoids. (See Table 1.)... 

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