The invention provides compositions and methods for delaying the onset of delivery in a pregnant subject, such as a pregnant human subject, that is undergoing or at risk of undergoing preterm labor at a gestational age of from about 24 weeks to about 34 weeks. Using the compositions and methods described herein, such subjects may be administered nifedipine in combination with a prostaglandin F2α (PGF2α) antagonist. Exemplary PGF2α receptor antagonists that may be used for the treatment or prevention of preterm labor as described herein include 1,3-thiazolidine-2-carboxamide compounds, such as (3S)-3-([(2S)-3-(biphenyl-4-ylsulfonyl)-1,3-thiazolidin-2-yl]carbonyl}-amino)-3-(4-fluorophenyl)propyl L-valinate or a pharmaceutically acceptable salt thereof (e.g., (3S)-3-([(2S)-3-(biphenyl-4-ylsulfonyl)-1,3-thiazolidin-2-yl]carbonyl}-amino)-3-(4-fluorophenyl)propyl L-valinate hydrochloride. Using the compositions and methods described herein, a subject may be dosed with a PGF2α receptor antagonist and a reduced amount or frequency of nifedipine relative to the amount or frequency of nifedipine that would otherwise be used if the nifedipine were given in the absence of the PGF2α receptor antagonist.
本发明提供了用于延缓妊娠受试者(如怀孕的人类受试者)在孕龄约24周至约34周时发生早产或有发生早产风险的组合物和方法。使用本文所述的组合物和方法,可将
硝苯地平与
前列腺素 F2α (
PGF2α)
拮抗剂联合给药。可用于治疗或预防本文所述早产的示例性
PGF2α 受体
拮抗剂包括 1,3-
噻唑烷-
2-甲酰胺化合物,如 (3S)-3-([(2S)-3-(biphenyl-4-ylsulfonyl)-1,3-thiazolidin-2-yl]carbonyl}-amino)-3-(4-fluorophenyl)propyl L-valinate 或其药学上可接受的盐(例如:(3S)-3-([(2S)-3-(biphenyl-4-ylsulfonyl)-1,3-
噻唑烷-2-基]羰基}-
氨基}-3-(4-
氟苯基)丙基)、(3S)-3-([(2S)-3-(
联苯-4-基磺酰基)-1,3-
噻唑烷-2-基]羰基}-
氨基)-3-(4-
氟苯基)丙基
L-缬氨酸盐酸盐。使用本文所述的组合物和方法,可向受试者施用
PGF2α 受体
拮抗剂和
硝苯地平,相对于在没有
PGF2α 受体
拮抗剂的情况下施用
硝苯地平的用量或次数而言,可减少
硝苯地平的用量或次数。