Anti-Periostin/Postn Antibody Picoband®

POSTN (Periostin), also known as PN or OSF2, is a protein that in humans is encoded by the POSTN gene. The International Radiation Hybrid Mapping Consortium mapped the POSTN gene to chromosome 13. It was found that purified recombinant PN supported adhesion of ovarian epithelial cells. And periostin was overexpressed by the majority of human primary breast cancers examined. Transfected tumor cell lines overexpressing periostin showed accelerated growth and angiogenesis as xenografts in immunocompromised animals. It was showed that extracellular periostin induced reentry of differentiated mammalian cardiomyocytes into the cell cycle.

Atherosclerosis, Cancer, Cardiogenesis, Cardiovascular, Cell Adhesion Molecules, Cell Type Markers, Cytoskeleton/ECM, Extracellular Matrix, Invasion/Microenvironment, Signal Transduction, Structures, Tags & Cell Markers, Vascular Inflammation

Error-prone DNA polymerase specifically involved in DNA repair. Plays an important role in translesion synthesis, where the normal high-fidelity DNA polymerases cannot proceed and DNA synthesis stalls. Favors Hoogsteen base-pairing in the active site. Inserts the correct base with high-fidelity opposite an adenosine template. Exhibits low fidelity and efficiency opposite a thymidine template, where it will preferentially insert guanosine. May play a role in hypermutation of immunogobulin genes. Forms a Schiff base with 5'-deoxyribose phosphate at abasic sites, but may not have lyase activity.

1. Gillan, L., Matei, D., Fishman, D. A., Gerbin, C. S., Karlan, B. Y., Chang, D. D. Periostin secreted by epithelial ovarian carcinoma is a ligand for alpha-V-beta-3 and alpha-V-beta-5 integrins and promotes cell motility. Cancer Res. 62: 5358-5364, 2002. 2. Kuhn, B., del Monte, F., Hajjar, R. J., Chang, Y.-S., Lebeche, D., Arab, S., Keating, M. T. Periostin induces proliferation of differentiated cardiomyocytes and promotes cardiac repair. Nature Med. 13: 962-969, 2007. 3. Shao, R., Bao, S., Bai, X., Blanchette, C., Anderson, R. M., Dang, T., Gishizky, M. L., Marks, J. R., Wang, X.-F. Acquired expression of periostin by human breast cancers promotes tumor angiogenesis through up-regulation of vascular endothelial growth factor receptor 2 expression. Molec. Cell. Biol. 24: 3992-4003, 2004.

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.