Trichinella spiralis gamma-aminobutyric acid receptor (Ts-GABAR)

The Trichinella spiralis gamma-aminobutyric acid (GABA) receptor is a ligand-gated chloride channel belonging to the cys-loop receptor superfamily (Martin, 1997). It plays a fundamental role in the inhibitory neurotransmission of the parasite, specifically mediating muscle relaxation and coordinating locomotor activity (Gao et al., 2023). These receptors are primarily localized at the neuromuscular junctions of the nematode, where GABA binding triggers an influx of chloride ions, leading to membrane hyperpolarization (Bamber et al., 1999). In the context of disease, Trichinella spiralis is the causative agent of trichinellosis, and its GABA receptors are critical targets for anthelmintic intervention (NCBI, 2022). Anthelmintic agents such as piperazine function as agonists at these receptors, inducing flaccid paralysis in the worm to facilitate its clearance from the host intestinal tract (PubChem, 2024). Macrocyclic lactones like ivermectin may also modulate these channels, although their primary affinity is often for glutamate-gated chloride channels (Raymond and Sattelle, 2002). The structural differences between nematode GABA receptor subunits, such as the UNC-49 complex, and mammalian GABA-A receptors provide a basis for selective toxicity, although potential cross-reactivity remains a safety consideration (Bamber et al., 1999). Research into these receptors is ongoing to overcome challenges such as drug resistance and to identify novel binding sites for next-generation antiparasitic drugs (Gao et al., 2023).

Other names

GABA-gated chloride channelTs-UNC-49Gamma-aminobutyric acid receptor of Trichinella spiralisTs-GAB-1

Agonism or positive allosteric modulation of GABA-gated chloride channels, leading to chloride ion influx, hyperpolarization of neuromuscular membranes, and flaccid paralysis of the parasite (Martin, 1997; PubChem, 2024).