Citrullinated glial fibrillary acidic protein (citGFAP) is a citrullinated form of GFAP (Item No. 27353), a class III intermediate filament (IF) protein that is expressed in mature astrocytes and contributes to cytoskeletal structure and strength.1 GFAP can be citrullinated in a calcium-dependent manner on the arginine residue at position 270 (R270) and at R416 by protein arginine deiminase 1 (PAD1; Item No. 10784) and PAD2 (Item No. 10785).2 citGFAP levels are increased by the calcium ionophore ionomycin (Item No. 10004974) in an in vitro model of traumatic brain injury (TBI) using NHA CC-2565 human astrocytes and are induced by controlled cortical impact in the cerebral cortex in a rat model of TBI.3 It has been found in the hippocampus in a rat model of Alzheimer's disease induced by amyloid-β (25-35), as well as in the retina in a mouse model of alkali-induced eye injury.4,5 citGFAP has also been found in postmortem hippocampus from patients with Alzheimer's disease, and citGFAP levels are increased in postmortem-derived brain lesions from patients with multiple sclerosis.2,6 Cayman's Citrullinated GFAP (R416) Monoclonal Antibody (Clone 4B8) can be used for ELISA, Immunohistochemistry, and Western blot applications. The antibody recognizes recombinant GFAP and citGFAP at 37 kDa.WARNING This product is not for human or veterinary use.
