Use at an assay dependent concentration. Can be paired for Sandwich ELISA with Rabbit monoclonal [PSH12-16] to Human IGFBP3 antibody (Capture) (HA723432) and Recombinant Human IGFBP3 protein (HA210585) as the standard.
Target
Function
Multifunctional protein that plays a critical role in regulating the availability of IGFs such as IGF1 and IGF2 to their receptors and thereby regulates IGF-mediated cellular processes including proliferation, differentiation, and apoptosis in a cell-type specific manner. Also exhibits IGF-independent antiproliferative and apoptotic effects mediated by its receptor TMEM219/IGFBP-3R. This gene is a member of the insulin-like growth factor binding protein (IGFBP) family and encodes a protein with an IGFBP domain and a thyroglobulin type-I domain. The protein forms a ternary complex with insulin-like growth factor acid-labile subunit (IGFALS) and either insulin-like growth factor (IGF) I or II. In this form, it circulates in the plasma, prolonging the half-life of IGFs and altering their interaction with cell surface receptors. Alternate transcriptional splice variants, encoding different isoforms, have been characterized.
Background References
1. Leslie AR et al. IGFBP3 promotes resistance to Olaparib via modulating EGFR signaling in advanced prostate cancer. iScience. 2024 Jan
2. Ali SR et al. Paracrine IGFBP3 spatially coordinates IGF signaling to induce myocardial regeneration in mice. J Mol Cell Cardiol. 2025 Oct
Sandwich ELISA analysis of human IGFBP3 matched pair antibodies Capture: HA723432, Human Leptin Rabbit mAb [PSH12-16] Detector: HA723433, Human Leptin Rabbit mAb [PSH12-17] Elisa assay was performed by coating wells of a 96-well plate with 50 µl per well of capture antibody (HA723432) diluted in carbonate/bicarbonate buffer, at a concentration of 2 µg/ml overnight at 4℃. Wells of the plate were washed, blocked with 150 µl 0.05% tween-20 1% BSA blocking buffer, and incubated with serial diluted Recombinant Human IGFBP3 protein (HA210585) starting from 10,000 pg/ml to 0 pg/ml and detect antibody (HA723433, HRP, 0.05 µg/ml) for 1 hour at 30℃ with shaking. Detection was performed using an Ultra TMB Substrate for 10 minutes at room temperature in the dark. The reaction was stopped with sulfuric acid and absorbances were read on a spectrophotometer at 450 nm.
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