Cagrilintide

Mechanism of action in research models

Cagrilintide is a long-acting analogue of amylin (islet amyloid polypeptide, IAPP), a 37-amino-acid peptide hormone co-secreted with insulin from pancreatic beta cells. It acts as an agonist at the amylin receptor family — heterodimers of the calcitonin receptor (CTR) with receptor-activity-modifying proteins RAMP1, RAMP2, and RAMP3 (designated AMY1, AMY2, AMY3) — and retains activity at the calcitonin receptor itself. Receptor engagement is Gs-coupled, raising intracellular cAMP in the research cell systems used to characterise amylin pharmacology.

The three principal effects studied for native amylin, and reproduced by Cagrilintide in preclinical models, are slowed gastric emptying, suppression of post-prandial glucagon secretion, and central induction of satiety. The satiety signal is mediated largely through the area postrema and nucleus tractus solitarius, circumventricular brainstem regions where amylin receptors are densely expressed and the blood–brain barrier is permeable.

Why the acylation matters

Native amylin has a short half-life and a strong tendency to aggregate, which limits its usefulness in chronic study designs. Cagrilintide carries a C20 fatty-diacid acylation that drives reversible binding to serum albumin, creating a circulating reservoir that extends the effective research window and supports once-weekly dosing protocols. Researchers running serum-containing assay media should account for this albumin sequestration when interpreting free-compound concentrations.

Research context: amylin plus incretin

The most active area of amylin-analogue research is combinatorial pathway modulation — pairing an amylin agonist with a GLP-1 receptor agonist such as semaglutide. The two hormones act through distinct receptors and complementary mechanisms (amylin via brainstem satiety and gastric emptying; GLP-1 via hypothalamic and pancreatic signalling), and co-administration is studied for additive effects on food intake and metabolic endpoints. HALO supplies this combination as a fixed-ratio blend; see the CagriSema research guide.

Identity and handling

Cagrilintide ships lyophilized at ≥98% HPLC purity with independent COA. Reconstitute in sterile bacteriostatic water (in-vivo work) or an appropriate buffer for cell culture, and store −20 °C dry, 4 °C reconstituted ≤28 days. Because the parent hormone is aggregation-prone, avoid repeated freeze–thaw cycles of the reconstituted material and prepare working aliquots.