Vaginal and vulvar epithelium

The vaginal and vulvar epithelium is a stratified squamous epithelial layer that lines the female lower reproductive tract, serving as a critical physical and immunological barrier. This tissue is highly sensitive to sex hormones; estrogen specifically drives the proliferation and maturation of epithelial cells, which accumulate glycogen to support a healthy, acidic environment dominated by lactobacilli (StatPearls, 2023). In postmenopausal states, the decline in circulating estrogen leads to thinning, loss of elasticity, and increased pH, a condition known as vulvovaginal atrophy (VVA) or genitourinary syndrome of menopause (GSM) (NAMS, 2020). While the epithelium itself is an anatomical structure rather than a single molecular target, it contains various receptors—most notably estrogen receptors alpha and beta—that are the primary targets for pharmacological interventions such as topical estradiol, selective estrogen receptor modulators (SERMs), and prasterone (NIH, 2021). Additionally, the epithelium is the site of action for immunomodulators like imiquimod and antineoplastic agents like fluorouracil, which are used to treat localized viral infections and pre-cancerous lesions (Mayo Clinic, 2023). Therapeutic strategies often focus on restoring the structural integrity and physiological function of this tissue to alleviate symptoms like dyspareunia and chronic irritation.

Other names

Vaginal mucosaVulvar mucosaVaginal liningVulvar liningVaginal wall

Activation of estrogen receptors (ER-alpha and ER-beta) to stimulate epithelial proliferation and glycogen production; selective modulation of estrogen receptors in specific tissues; intracellular conversion of DHEA into active estrogens and androgens; agonism of Toll-like receptor 7 (TLR7) to induce local cytokine production; and inhibition of thymidylate synthase to disrupt DNA synthesis in dysplastic cells.