Insulin-like growth factor-binding protein 1 (IBP-1) also known as placental protein 12 (PP12) is a protein that in humans is encoded by the IGFBP1 gene. 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 type-I thyroglobulin domain. The protein binds both insulin-like growth factors (IGFs) I and II and circulates in the plasma. Binding of this protein prolongs the half-life of the IGFs and alters their interaction with cell surface receptors. Alternate transcriptional splice variants, encoding different isoforms, have been characterized.
Background References
1. Hivert MF et al. Placental IGFBP1 levels during early pregnancy and the risk of insulin resistance and gestational diabetes. Med. 2024 Jun
2. Cai G et al. IGFBP1 Sustains Cell Survival during Spatially-Confined Migration and Promotes Tumor Metastasis. Adv Sci (Weinh). 2023 Jul
Western blot analysis of IGFBP1 on different lysates with Rabbit anti-IGFBP1 antibody (HA721429) at 1/1,000 dilution.
Lane 1: Human placenta tissue lysate Lane 2: Human liver tissue lysate
Lysates/proteins at 30 µg/Lane.
Predicted band size: 28 kDa Observed band size: 28 kDa
Exposure time: 28 seconds;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (HA721429) at 1/1,000 dilution was used in 5% NFDM/TBST at room temperature for 2 hours. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1:100,000 dilution was used for 1 hour at room temperature.
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