Decreased Tenofovir Diphosphate Concentrations in a Transgender Female Cohort: Implications for Human Immunodeficiency Virus Preexposure Prophylaxis.

Cottrell, Mackenzie L; Prince, Heather M A; Schauer, Amanda P; Sykes, Craig; Maffuid, Kaitlyn; Poliseno, Amanda; Chun, Tae-Wook; Huiting, Erin et al. · Clin Infect Dis · 2019

cross_sectional · Level IV

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Abstract

Feminizing hormone therapy (FHT) may interact with human immunodeficiency virus preexposure prophylaxis (PrEP). We found that transgender women who took FHT exhibited a 7-fold lower rectal tissue ratio of PrEP's active metabolites vs competing deoxynucleotides compared to cisgender women and men (P = .03) that inversely correlated with estradiol (ρ = -0.79; P < .05). Thus, FHT may negatively impact PrEP efficacy. Clinical Trials Registration . NCT02983110.

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