This ELISA kit provides quantitative measurement of Eosinophil Cationic Protein (ECP) in human samples, a cytotoxic granule protein released upon eosinophil degranulation that serves as a key biomarker of eosinophilic inflammation. Because ECP levels fluctuate dramatically between baseline and active inflammatory states, researchers need an assay that captures both resting and stimulated concentrations across diverse biological compartments.
Detection Range: The 15.6–1000 pg/mL range spans from near-baseline serum ECP levels in healthy individuals to moderately elevated concentrations seen in allergic inflammation, though samples from acute asthma exacerbations or hypereosinophilic conditions—where serum ECP can reach several hundred ng/mL—will require dilution prior to measurement.
Sensitivity: At 7.8 pg/mL, the kit detects ECP in low-abundance matrices such as saliva, urine, and conditioned media from eosinophil cultures where secreted ECP may be minimal, particularly under unstimulated or early-activation conditions.
Sample Compatibility: Validation across serum, plasma, cell culture supernatants, urine, saliva, and tissue homogenates enables researchers to correlate systemic eosinophil activation with local tissue degranulation or mucosal inflammation within a single study framework.
Assay Efficiency: The 1–5 hour protocol requiring only 50–100 µL accommodates limited-volume specimens such as pediatric samples or bronchoalveolar lavage fractions commonly encountered in eosinophil research.
This kit directly supports investigations in allergic asthma monitoring, eosinophilic esophagitis, and anti-eosinophil therapeutic efficacy assessment.