Recombinant Human EMAP-II

Endothelial monocyte activating polypeptide II (EMAP II) is a pro-inflammatory cytokine with anti-angiogenic properties. This protein was discovered in the supernatant of Meth-A fibrosarcoma cells and was shown to enhance the induction of the procoagulant Tissue Factor (TF) on endothelial cells. Besides up-regulation of TF mRNA, EMAP II increases cellular receptors for TNF on endothelial cells, which is likely to enhance the predisposition of tumors to undergo thrombosis and hemorrhagic necrosis, once challenged with TNF.¹ EMAP II functions as a potent inhibitor of primary and metastatic tumor growth, has strong inhibitory effects on endothelial cells and can reduce intratumoral expression of the angiogenesis inducer vascular endothelial growth factor (VEGF). ² It is also chemotactic towards neutrophils and monocytes and induces myeloperoxidase activity from neutrophils.

The biological activity of Human Endothelial Monocyte Activating Polypeptide-II is determined by the apoptotic effect on MCF-7 cells (human breast carcinoma cells) using a concentration of 20-40 ng/ml.

SKPIDVSRLD LRIGCIITAR KHPDADSLYV EEVDVGEIAP RTVVSGLVNH VPLEQMQNRM VILLCNLKPA KMRGVLSQAM VMCASSPEKI EILAPPNGSV PGDRITFDAF PGEPDKELNP KKKIWEQIQP DLHTNDECVA TYKGVPFEVK GKGVCRAQTM SNSGIK

The lyophilized protein should be stored desiccated at -20°C. The reconstituted protein can be stored for at least one week at 4°C. For long-term storage of the reconstituted protein, aliquot into working volumes and store at -20°C in a manual defrost freezer. Avoid Repeated Freeze Thaw Cycles.

1. Ten Hagen TL. et al. (2004) Anticancer Res. 24: 2243 2. Schwarz RE. et al. (2009) Lab Invest. 89: 38