Anti-Apelin/APLN Antibody Picoband® Fluoro647 Conjugated

Apelin is a neuropeptide expressed in the supraoptic and paraventricular nuclei that acts on specific receptors located on vasopressinergic neurons. The apelin gene to Xq25-q26.3 based on sequence similarity between the apelin sequence and a chromosome X PAC clone. This gene encodes a peptide that functions as an endogenous ligand for the G protein coupled receptor APJ. The encoded protein is synthesized as a prepropeptide that is processed into biologically active C-terminal fragments. The peptide fragments activate different tissue specific signaling pathways that regulate diverse biological functions including fluid homeostasis, cardiovascular function and insulin secretion. This protein also functions as a coreceptor for the human immunodeficiency virus 1.

Expressed in the brain with highest levels in the frontal cortex, thalamus, hypothalamus and midbrain. Secreted by the mammary gland into the colostrum and the milk.

Endogenous ligand for APJ, an alternative coreceptor with CD4 for HIV-1 infection. Inhibits HIV-1 entry in cells coexpressing CD4 and APJ. Apelin-36 has a greater inhibitory activity on HIV infection than other synthetic apelin derivatives. The oral intake in the colostrum and the milk could have a role in the modulation of the immune responses in neonates. May also have a role in the central control of body fluid homeostasis by influencing AVP release and drinking behavior. .

1. Cayabyab, M., Hinuma, S., Farzan, M., Choe, H., Fukusumi, S., Kitada, C., Nishizawa, N., Hosoya, M., Nishimura, O., Messele, T., Pollakis, G., Goudsmit, J., Fujino, M., Sodroski, J. Apelin, the natural ligand of the orphan seven-transmembrane receptor APJ, inhibits human immunodeficiency virus type 1 entry.J. Virol. 74: 11972-11976, 2000. 2. Chen, M. M., Ashley, E. A., Deng, D. X. F., Tsalenko, A., Deng, A., Tabibiazar, R., Ben-Dor, A., Fenster, B., Yang, E., King, J. Y., Fowler, M., Robbins, R., Johnson, F. L., Bruhn, L., McDonagh, T., Dargie, H., Yakhini, Z., Tsao, P. S., Quertermous, T.Novel role for the potent endogenous inotrope apelin in human cardiac dysfunction.Circulation 108: 1432-1439, 2003. 3. De Mota, N., Reaux-Le Goazigo, A., El Messari, S., Chartrel, N., Roesch, D., Dujardin, C., Kordon, C., Vaudry, H., Moos, F., Llorens-Cortes, C. Apelin, a potent diuretic neuropeptide counteracting vasopressin actions through inhibition of vasopressin neuron activity and vasopressin release.Proc. Nat. Acad. Sci. 101: 10464-10469, 2004.