Myometrial smooth muscle cell ion channel

The term “Myometrial smooth muscle cell ion channel” does not specify a single molecular target, but instead refers to the ensemble of ion channels responsible for establishing and regulating the membrane potential and excitability in myometrial (uterine smooth muscle) cells. These include several families of ion channels such as L-type and T-type calcium channels (CACNA1C and related genes), voltage-gated, ATP-sensitive, and Ca^2+-activated potassium channels (Kv, Kir, KCNMA1/BK, Slo2/Slick, KCNN1-4), voltage-gated and leak sodium channels (SCN, NALCN), and calcium-activated chloride channels (TMEM16A/ANO1). These channels coordinate the transition of the uterus from a quiescent state during pregnancy to a contractile state during labor by controlling action potential generation, propagation, and the resulting muscle contraction or relaxation. Alteration in any of these channels can affect uterine contractility and are implicated in disorders like preterm labor. Drugs targeting individual channel types, such as L-type calcium channel blockers (nifedipine) or K^+^ channel modulators, are used clinically to manage uterine contractility. However, this designation is not the canonical full name of a single target, but a broad descriptive term that should be replaced with the specific channel's name (e.g., “Calcium-activated chloride channel TMEM16A (ANO1)” or “L-type calcium channel”). Therefore, it is not a single, specific molecular target, and use of this phrase as a canonical target name is inaccurate. If the intention is to refer to a specific channel (e.g., TMEM16A/ANO1 for Ca^2+-activated Cl^-^ currents, or CACNA1C for L-type Ca^2+), use the precise molecular target name. If general discussion of uterine excitability is intended, reference the “ion channel repertoire of myometrial smooth muscle”.

Other names

Myometrial ion channelsUterine smooth muscle ion channels

Blockade or modulation of calcium, potassium, or chloride channels to alter excitability and contraction