Tenofovir Diphosphate Concentrations in Dried Blood Spots From Pregnant and Postpartum Adolescent and Young Women Receiving Daily Observed Pre-exposure Prophylaxis in Sub-Saharan Africa.
Tenofovir Diphosphate Concentrations in Dried Blood Spots From Pregnant and Postpartum Adolescent and Young Women Receiving Daily Observed Pre-exposure Prophylaxis in Sub-Saharan Africa.
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DOI:
10.1093/cid/ciaa1872
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发表时间:
2021-10-05
期刊:
影响因子:
--
通讯作者:
IMPAACT 2009 Team
中科院分区:
文献类型:
--
作者:
Stranix-Chibanda L;Anderson PL;Kacanek D;Hosek S;Huang S;Nematadzira TG;Taulo F;Korutaro V;Nakabiito C;Masenya M;Lypen K;Brown E;Ibrahim ME;Yager J;Wiesner L;Johnston B;Amico KR;Rooney JF;Chakhtoura N;Spiegel HML;Chi BH;IMPAACT 2009 Team
Intracellular tenofovir diphosphate (TFV-DP) concentration in dried blood spots (DBSs) is used to monitor cumulative pre-exposure prophylaxis (PrEP) adherence. We evaluated TFV-DP in DBSs following daily oral PrEP (emtricitabine 200 mg/tenofovir diphosphate 300 mg) among pregnant and postpartum adolescent girls and young women (AGYW). Directly observed PrEP was administered for 12 weeks in a pregnancy (14–24 weeks’ gestation, n = 20) and postpartum (6–12 weeks postpartum, n = 20) group of AGYW aged 16–24 years in sub-Saharan Africa. Weekly DBS TFV-DP was measured by validated liquid chromatography–tandem mass spectrometry assay. Week 12 TFV-DP distributions were compared between groups with Wilcoxon test. Population pharmacokinetic models were fit to estimate steady-state concentrations and create benchmarks for adherence categories. Baseline correlates of TFV-DP were evaluated. Median age was 20 (IQR, 19–22) years. Of 3360 doses, 3352 (>99%) were directly observed. TFV-DP median (IQR) half-life was 10 (7–12) days in pregnancy and 17 (14–21) days postpartum, with steady state achieved by 5 and 8 weeks, respectively. Observed median (IQR) steady-state TFV-DP was 965 fmol/punch (691–1166) in pregnancy versus 1406 fmol/punch (1053–1859) postpartum (P = .006). Modeled median steady-state TFV-DP was 881 fmol/punch (667–1105) in pregnancy versus 1438 fmol/punch (1178–1919) postpartum. In pooled analysis, baseline creatinine clearance was associated with observed TFV-DP concentrations. TFV-DP in African AGYW was approximately one-third lower in pregnancy than postpartum. These Population-specific benchmarks can be used to guide PrEP adherence support in pregnant/postpartum African women. NCT03386578 Concentrations of tenofovir diphosphate in dried blood spots were approximately one-third lower during pregnancy than postpartum after 12 weeks of directly observed dosing among African adolescent girls and young women on daily pre-exposure prophylaxis. We recommend population-specific benchmarks for adherence support.
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DOI:
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发表时间:
2018-08-24
期刊:
AIDS (London, England)
影响因子:
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通讯作者:
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