Etelcalcetide HCl

Etelcalcetide HCl (CAS No.: 1334237-71-6) is a synthetic peptide calcimimetic and allosteric modulator of the calcium sensing receptor CaSR, positioned within endocrine and renal disease research as a tool compound for interrogating receptor mediated control of parathyroid hormone regulation and mineral metabolism signaling networks in chronic kidney disease associated secondary hyperparathyroidism models. As a chemically engineered peptide scaffold rather than a natural product, it is primarily categorized in receptor pharmacology and translational mechanism of action studies, where it is used to characterize CaSR dependent intracellular signaling events, including modulation of G protein coupled pathways and downstream calcium responsive processes that influence parathyroid hormone secretion dynamics. Published summaries consistently identify CaSR as the principal validated target, while detailed potency metrics vary by assay platform and biological system; in the absence of uniformly reported cross study parameters, activity is generally evaluated across concentration windows spanning the nanomolar to micromolar range in receptor activation and biomarker response experiments. In laboratory practice, this reagent is applied in cell based systems expressing CaSR, ex vivo endocrine tissue assays, and preclinical animal paradigms designed to study parathyroid hormone axis biology, target engagement, and pharmacodynamic response relationships, and it is also incorporated into comparative screening workflows for next generation calcimimetic discovery and pathway deconvolution. Experimental concentrations or doses are selected according to model context, exposure schedule, and study endpoints, with optimization typically guided by receptor expression level, assay sensitivity, and predefined research objectives.