The effect of bisphenol PH and seven other bisphenol A alternatives on human haemostasis in vitro

Recognition of bisphenol A's toxicity has meant substitution by new analogues, which are poorly investigated. We determined the impact of bisphenol A and 8 of its analogues on platelet aggregation, coagulation, and their toxicity to erythrocytes. Erythrocyte lysis assays revealed bisphenol toxicity towards both human and rat erythrocytes with high TC₅₀s > 100 μM. Bisphenol A and bisphenol PH acted as antiplatelet compounds. Bisphenol PH was particularly potent (IC₅₀ of 0.42 ± 0.14 μM; 0.16 ± 0.05 μg/ml) in arachidonic acid-based platelet aggregation. Mechanistically, bisphenol PH blocked cyclooxygenase 1, in a similar manner to the antiplatelet drug acetylsalicylic acid. In terms of the coagulation cascade, only weak effects were found for some of the selected compounds, and the tested bisphenols did not impact coagulation or demonstrate erythrocytic toxicity at biologically achievable concentrations. Contrarily, the negative impact of bisphenol PH on platelets, with a possible subsequent risk of bleeding, might have biological relevance.