Anti-Presenilin 2/AD5/PSEN2 Antibody Picoband®

Presenilin-2 is a protein that in humans is encoded by the PSEN2 gene. Alzheimer's disease (AD) patients with an inherited form of the disease carry mutations in the presenilin proteins (PSEN1 or PSEN2) or the amyloid precursor protein (APP) . These disease-linked mutations result in increased production of the longer form of amyloid-beta (main component of amyloid deposits found in AD brains) . Presenilins are postulated to regulate APP processing through their effects on gamma-secretase, an enzyme that cleaves APP. Also, it is thought that the presenilins are involved in the cleavage of the Notch receptor such that, they either ly regulate gamma-secretase activity, or themselves act are protease enzymes. Two alternatively spliced transcript variants encoding different isoforms of PSEN2 have been identified.

Together with fibrinogen alpha (FGA) and fibrinogen beta (FGB), polymerizes to form an insoluble fibrin matrix. Has a major function in hemostasis as one of the primary components of blood clots. In addition, functions during the early stages of wound repair to stabilize the lesion and guide cell migration during re- epithelialization. Was originally thought to be essential for platelet aggregation, based on in vitro studies using anticoagulated blood. However, subsequent studies have shown that it is not absolutely required for thrombus formation in vivo. Enhances expression of SELP in activated platelets via an ITGB3- dependent pathway. Maternal fibrinogen is essential for successful pregnancy. Fibrin deposition is also associated with infection, where it protects against IFNG-mediated hemorrhage. May also facilitate the antibacterial immune response via both innate and T-cell mediated pathways. .

1. Muller, U., Winter, P., Graeber, M. B. Alois Alzheimer's case, Auguste D., did not carry the N141I mutation in PSEN2 characteristic of Alzheimer disease in Volga Germans. (Letter) Arch. Neurol. 68: 1210-1211, 2011. 2. Piscopo, P., Marcon, G., Piras, M. R., Crestini, A., Campeggi, L. M., Deiana, E., Cherchi, R., Tanda, F., Deplano, A., Vanacore, N., Tagliavini, F., Pocchiari, M., Giaccone, G., Confaloni, A. A novel PSEN2 mutation associated with a peculiar phenotype. Neurology 70: 1549-1554, 2008. 3. Yu, C.-E., Marchani, E., Nikisch, G., Muller, U., Nolte, D., Hertel, A., Wijsman, E. M., Bird, T. D. The N141I mutation in PSEN2: implications for the quintessential case of Alzheimer disease. Arch. Neurol. 67: 631-633, 2010.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.