Schistosome voltage-gated calcium channels (VGCCs) (VGCCs)

Schistosome voltage-gated calcium channels (VGCCs) are essential multimeric proteins that mediate the influx of calcium ions into the excitable cells of Schistosoma parasites, such as Schistosoma mansoni [1.1.1, 1.2.1]. These channels are composed of pore-forming alpha-1 subunits (e.g., SmCav1, SmCav2) and auxiliary beta subunits, which are crucial for regulating muscle contraction, tegumental stability, and reproductive processes [1.2.2, 1.2.4]. For decades, VGCCs were considered the primary molecular target of Praziquantel (PZQ), the mainstay treatment for schistosomiasis, because the drug induces a rapid, calcium-dependent contraction and paralysis of the worm [1.1.3, 1.3.1]. Although recent studies have identified a specific transient receptor potential (TRP) channel (TRPMPZQ) as the direct target of Praziquantel, VGCCs remain central to the parasite's neuromuscular physiology and are significant downstream effectors of anthelmintic action [1.3.2, 1.3.4]. The structural divergence between schistosome and human VGCC subunits, particularly the presence of unique variant beta subunits (SmCavbeta_var), makes them attractive targets for the development of new, selective anti-parasitic therapies [1.2.1, 1.4.1]. Targeting these channels disrupts the parasite's ability to maintain calcium homeostasis, leading to rapid paralysis and eventual death [1.1.2, 1.3.1].

Other names

Schistosome Cav channelsSchistosome VOCCsSchistosoma mansoni voltage-gated calcium channelsSmCav

Modulation of calcium ion influx to disrupt neuromuscular function and tegumental integrity, typically leading to rapid muscle contraction and paralysis.