Gene
Foxo1
Uniprot
Q9R1E0
Protein
Forkhead box protein O1
See alternative names
Forkhead in rhabdomyosarcoma,
Forkhead box protein O1A
Uniprot Function Description
Transcription factor that is the main target of insulin signaling and regulates metabolic homeostasis in response to oxidative stress (PubMed:12754525, PubMed:15184386, PubMed:15220471, PubMed:16917544, PubMed:17090532, PubMed:17627282, PubMed:17681146, PubMed:20519497, PubMed:20668652, PubMed:21196578, PubMed:21335550, PubMed:21471200, PubMed:22298775, PubMed:22417654, PubMed:22510882). Binds to the insulin response element (IRE) with consensus sequence 5'-TT[G/A]TTTTG-3' and the related Daf-16 family binding element (DBE) with consensus sequence 5'-TT[G/A]TTTAC-3' (PubMed:17090532, PubMed:21335550). Activity suppressed by insulin (PubMed:12754525, PubMed:17627282). Main regulator of redox balance and osteoblast numbers and controls bone mass (PubMed:21471200, PubMed:22298775). Orchestrates the endocrine function of the skeleton in regulating glucose metabolism (PubMed:21471200, PubMed:22298775). Also acts as a key regulator of chondrogenic commitment of skeletal progenitor cells in response to lipid availability: when lipids levels are low, translocates to the nucleus and promotes expression of SOX9, which induces chondrogenic commitment and suppresses fatty acid oxidation (PubMed:32103177). Acts synergistically with ATF4 to suppress osteocalcin/BGLAP activity, increasing glucose levels and triggering glucose intolerance and insulin insensitivity (PubMed:22298775). Also suppresses the transcriptional activity of RUNX2, an upstream activator of osteocalcin/BGLAP (PubMed:21471200). In hepatocytes, promotes gluconeogenesis by acting together with PPARGC1A and CEBPA to activate the expression of genes such as IGFBP1, G6PC1 and PCK1 (PubMed:12754525). Important regulator of cell death acting downstream of CDK1, PKB/AKT1 and STK4/MST1 (By similarity). Promotes neural cell death (By similarity). Mediates insulin action on adipose tissue (By similarity). Regulates the expression of adipogenic genes such as PPARG during preadipocyte differentiation and, adipocyte size and adipose tissue-specific gene expression in response to excessive calorie intake (By similarity). Regulates the transcriptional activity of GADD45A and repair of nitric oxide-damaged DNA in beta-cells (PubMed:21196578). Required for the autophagic cell death induction in response to starvation or oxidative stress in a transcription-independent manner (By similarity). Mediates the function of MLIP in cardiomyocytes hypertrophy and cardiac remodeling (By similarity). Regulates endothelial cell (EC) viability and apoptosis in a PPIA/CYPA-dependent manner via transcription of CCL2 and BCL2L11 which are involved in EC chemotaxis and apoptosis (By similarity).
Sample type
Recommended sample types are plasma and serum. A range of additional sample types are compatible with the technology (PEA), including citrate plasma, heparin plasma, cerebrospinal fluid, (CSF), tissue and cell lysates, fine needle biopsies, microdialysis fluid, cell culture media, dried blood spots, synovial fluid, saliva, plaque extract and microvesicles. Please note that protein expression levels are expected to vary between different sample types. Certain assays are differentially affected by interfering substances such as hemolysate. Download any of our Data Validation documents or contact support@olink.com for more information.
Precision
Precision (repeatability) is calculated from quantified data (pg/mL) within the limits of quantification: LOQ.
Analytical measuring range
The technical data reported below refers to the measured values generated during the assay validation process using recombinant antigens. Per default, Olink Target 48 products deliver data in absolute protein concentrations (pg/mL) using the Calibrator built into the system.
Sensitivity plot
The calibrator curve shown below visualizes the analytical measuring range determined during the validation process using recombinant antigen. Please note that this is shown for reference only and CANNOT be used to e.g. convert NPX values to absolute concentrations. The vertical dotted lines represent lower limit of quantification (LLOQ) and upper limit of quantification (ULOQ) respectively. The solid horizontal line indicates the limit of detection (LOD).
Biomarker Validation Data
Additional validation data, as well as a more detailed description of how the Olink panels are quality controlled can be found in our Data Validation documents – go to Document download center