Target intelligence / Profile preview

Alpha-fetoprotein (AFP)

Target: AFP
Molecular classification: Glycoprotein, Albuminoid gene family, Carrier Protein

Overview

Alpha-fetoprotein (AFP) is a glycoprotein primarily produced by the fetal liver and yolk sac during embryonic development. In fetuses, it functions as a carrier protein for various ligands. In adults, elevated AFP levels are associated with certain cancers, including hepatocellular carcinoma and germ cell tumors, and is used as a tumor marker. It is also used in prenatal screening to assess the risk for certain birth defects or genetic problems.

Other names: Alpha fetoproteinα-Fetoprotein

Mechanism of action

Binds various membrane receptors and intracellular proteins; modulates responses from intracellular signaling pathways involved in cell growth regulation. Acts as enhancer or inhibitor of cellular proliferation depending on physiological/pathological context.

Biological functions

Carrier protein for hydrophobic ligandsFatty acid transportRetinoid transportSteroid transportBilirubin transportCell growth modulationImmunotherapy vaccine componentAnticancer drug carrier (experimental)

Disease associations

Hepatocellular carcinoma (HCC)Germ cell tumorsMetastatic liver diseaseNeural tube defects (risk assessment)Down syndrome (risk assessment)Ataxia-telangiectasiaYolk sac tumors

Safety considerations

Elevated levels can be associated with benign conditions (cirrhosis, chronic hepatitis) requiring differential diagnosis.Abnormal prenatal screening results require further testing to confirm diagnosis.AFP levels can be affected by multiple factors, so results should be interpreted in conjunction with other clinical findings.

Biomarkers

Hepatocellular carcinoma (diagnosis and monitoring)Germ cell tumors (diagnosis and monitoring)Prenatal screening for neural tube defects and Down syndrome

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