This ELISA kit provides quantitative measurement of soluble TNFRSF1A (sTNFR1) in human samples, supporting research into TNF-α signaling and inflammatory pathway regulation. Because sTNFR1 is shed from cell surfaces during inflammation and serves as both a biomarker and a decoy receptor modulating TNF-α bioavailability, accurate quantification across biological compartments is essential for interpreting TNF signaling dynamics.
Detection Range: The 7.8–500 pg/ml range captures circulating sTNFR1 levels in healthy serum (typically 1–2 ng/ml), meaning most serum and plasma samples will require dilution, while lower-abundance matrices like urine, saliva, and conditioned media can often be measured neat or with minimal preparation.
Sensitivity: At 1.95 pg/ml, the kit detects sTNFR1 in low-concentration samples such as cell culture supernatants from unstimulated cells or saliva, where shed receptor levels may fall well below systemic concentrations.
Sample Compatibility: Validation across serum, plasma, tissue homogenates, urine, saliva, and cell culture supernatants enables paired systemic-and-local measurements — for example, comparing circulating sTNFR1 with levels in inflamed tissue homogenates or renal clearance via urine in nephritis studies.
Assay Efficiency: The 1–5 hour protocol and 50–100 µl sample volume accommodate experiments using limited primary cell supernatants or serial-sampled clinical specimens where material conservation is critical.
This kit is particularly suited for studies in sepsis-associated immune dysregulation, anti-TNF therapy monitoring, and chronic inflammatory disease progression.