Complex effects of imatinib on spontaneous and oxytocin-induced contractions in human non-pregnant myometrium

Direct exposure of myometrial strips to imatinib inhibits both the amplitude and frequency of contractions in a dose-dependent manner.

• The study examined human non-pregnant myometrial strips for their contraction responses to imatinib, a c-kit receptor antagonist.
• Imatinib was found to reduce contraction amplitude and frequency at concentrations ranging from 80 to 320 μM.
• Contraction amplitude returned to 90% of baseline after the removal of imatinib, indicating a reversible effect.
• Oxytocin at 60 nM completely inhibited myometrial contractions.
• Pre-exposure to oxytocin altered the effects of imatinib, increasing contraction amplitude while decreasing frequency at lower concentrations.

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