This ELISA kit provides quantitative measurement of soluble ICAM-1 (sICAM-1) in human serum, plasma, and tissue homogenates, supporting research into immune cell adhesion, transendothelial migration, and inflammatory signaling. Because sICAM-1 is shed from activated endothelium and leukocytes at concentrations that shift markedly between healthy and inflamed states, the kit is designed to resolve these differences without extensive sample manipulation.
Detection Range: The 0.312–20 ng/mL range sits within the lower segment of reported circulating sICAM-1 levels, which typically range from ~100–300 ng/mL in healthy serum and rise substantially in sepsis, atherosclerosis, or organ rejection. Researchers should plan for 1:20 to 1:100 sample dilutions for serum and plasma, while tissue homogenates—where local concentrations vary widely—may require less dilution.
Sensitivity: At 0.156 ng/mL, the kit detects sICAM-1 in diluted serum samples and in tissue homogenates where localized expression may be low, such as early-stage endothelial activation or quiescent tissue controls.
Sample Compatibility: Validation across serum, plasma, and tissue homogenates enables paired systemic-versus-local analyses—for example, correlating circulating sICAM-1 with expression at an inflamed tissue site within the same subject.
Assay Efficiency: The 1–5 hour protocol and 50–100 µL sample volume accommodate studies using limited biopsy-derived homogenates or longitudinal plasma collections requiring multiple timepoint measurements.
This kit is well suited for studies of vascular inflammation, transplant rejection monitoring, and immune checkpoint-related endothelial activation.