About Human Calcitonin Receptor (CALCR/CTR) Stable Cell Line

Calcitonin Receptor (CALCR), also known as CTR, is a Class B G protein-coupled receptor (GPCR) that serves as the primary receptor for calcitonin, a peptide hormone secreted by thyroid parafollicular C cells. CALCR plays a critical role in calcium and bone metabolism by regulating osteoclast activity, bone resorption, and mineral homeostasis. Upon activation by calcitonin, CALCR primarily couples to Gs proteins, stimulating adenylate cyclase activity and increasing intracellular cAMP levels. The receptor can also activate Gq-mediated signaling pathways, leading to intracellular calcium mobilization and activation of downstream signaling networks involved in skeletal and metabolic regulation.

CALCR is highly expressed in osteoclasts, kidney tissues, central nervous system structures, and other organs involved in mineral metabolism. Activation of CALCR inhibits osteoclast-mediated bone resorption, helping maintain calcium balance and skeletal integrity. Beyond its classical role in bone physiology, CALCR signaling has also been implicated in appetite regulation, pain modulation, reproductive biology, and neurological functions. Additionally, CALCR serves as the core receptor that forms heterodimeric amylin receptors (AMY1, AMY2, and AMY3) through association with receptor activity-modifying proteins (RAMPs), expanding its physiological significance in metabolic regulation.

eEnzyme's Human CALCR Stable Cell Line provides a reliable and reproducible cellular platform for investigating calcitonin receptor pharmacology and signaling mechanisms. The cell line enables quantitative assessment of calcitonin analogs, peptide therapeutics, agonists, antagonists, and novel receptor modulators through cAMP assays, calcium mobilization assays, reporter gene assays, and other GPCR functional screening platforms. Researchers can utilize this stable cell line for receptor characterization, potency determination, lead optimization, biosimilar evaluation, and high-throughput screening applications supporting bone disease, metabolic disease, and endocrine research.

Applications of the CALCR Stable Cell Line

• CALCR receptor pharmacology studies
• Calcitonin signaling investigations
• Agonist and antagonist screening
• Bone metabolism and osteoporosis research
• Osteoclast biology studies
• Calcium homeostasis investigations
• cAMP and calcium signaling assays
• High-throughput screening applications

Biological Significance of CALCR

CALCR is a key regulator of skeletal health and mineral metabolism. Activation of the receptor suppresses osteoclast activity, reducing bone resorption and helping maintain calcium homeostasis. This mechanism has made calcitonin and calcitonin receptor signaling important therapeutic targets for osteoporosis, Paget's disease, hypercalcemia, and other bone-related disorders. Beyond bone biology, CALCR participates in central nervous system signaling, energy balance regulation, nociception, and reproductive physiology. Importantly, CALCR serves as the receptor component required for formation of amylin receptor complexes through interaction with RAMP proteins, linking CALCR to glucose regulation, satiety signaling, obesity, and diabetes research. Because of its diverse physiological functions and therapeutic relevance, CALCR remains an important target in endocrinology, metabolic disease research, skeletal biology, and GPCR-focused drug discovery. The CALCR Stable Cell Line provides a valuable tool for studying receptor biology and advancing the development of next-generation therapeutics targeting bone and metabolic disorders.