Brief Report

Marco Floridia, Carmela Pinnetti, Marina Ravizza, Giulia Masuelli, Carlo Personeni, Matilde Sansone, Anna Degli Antoni, Giovanni Guaraldi, Arsenio Spinillo, Beatrice Tassis, Serena Dalzero, Giuseppina Liuzzi, Enrica Tamburrini

Research output: Contribution to journalArticlepeer-review


BACKGROUND: Abacavir-lamivudine (ABC/3TC) and tenofovir-emtricitabine (TDF/FTC) represent in the guidelines of several countries, including Italy and United States, the preferred nucleoside/nucleotide backbones of antiretroviral regimens. We assessed their profile in pregnancy using data from a national observational study.METHODS: Laboratory measures (CD4, HIV-RNA, lipid profile, glucose, hemoglobin, and alanine transferase) and pregnancy outcomes (preterm delivery, low birthweight, nonelective cesarean section, birthweight Z-score, congenital defects, HIV transmission, maternal weight gain, and pregnancy complications) were compared after prenatal exposure to ABC/3TC or TDF/FTC.RESULTS: The study evaluated 913 pregnancies (ABC/3TC: 252; TDF/FTC: 661). At entry in pregnancy, women on TDF/FTC were older (33.6 vs. 32.4 years, P = 0.005), less frequently on treatment (66.9% vs. 80.2%, P <0.001), and had lower CD4 counts (475/mm vs. 533/mm, P = 0.003) and higher plasma HIV-RNA levels (2.48 vs. 2.22 log10 copies/mL, P = 0.003). Women on ABC/3TC had more commonly hypertension/nephropathy (5.2% vs. 2.0%, P = 0.013). No major differences were observed in the main pregnancy outcomes and in rates of undetectable HIV-RNA at third trimester. In a subgroup analysis that evaluated at third trimester only cases with regular 3-drug treatment during pregnancy, women on TDF/FTC had lower hemoglobin levels (median: 11.1 vs. 11.8 g/dL, P = 0.002) and women on ABC/3TC had higher levels of total cholesterol (median: 230 vs. 216 mg/dL, P = 0.023) and low-density lipoprotein-cholesterol (133 vs. 111 mg/dL, P = 0.030).CONCLUSIONS: In this study, use of TDF/FTC and ABC/3TC in pregnancy was associated with similar pregnancy outcomes and with some differences in laboratory measures that might guide physicians' prescriptions in mothers with hematologic or metabolic risk factors.
Original languageEnglish
Pages (from-to)99-104
Number of pages6
JournalJournal of Acquired Immune Deficiency Syndromes
Issue number1
Publication statusPublished - May 1 2018


  • HIV infection


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