IRDye 800CW RGD Optical Agent Binds to Integrin Receptors.

IRDye 800CW RGD Optical Probe is a BrightSite™ near-infrared (NIR) fluorescently-labeled RGD imaging agent specifically designed to target the overexpression of integrins on tumors.

Integrins are cell surface heterodimeric glycoproteins involved in cell-to-cell and cell-to-matrix interactions. IRDye 800CW RGD Optical Probe is composed of the recognition motif, RGD (Arg-Gly-Asp), a tripeptide sequence used to bind integrin receptors including α_vβ₃. This receptor class is involved in tumor growth, tumor invasiveness, metastasis, tumor induced angiogenesis, inflammation, osteoporosis, and rheumatoid arthritis.

Interest in using a labeled RGD peptide ligand for the study and/or monitoring of diseases related to the α_vβ₃ receptor over-expression is increasing. Several groups have labeled RGD successfully with fluorescent dyes for in vitro and in vivo imaging.

Learn about other LI-COR optical probes.

Applications

Absorbance and Emission Spectra

Data Example

A) The On-Cell Western cell-based assay was used to evaluate binding affinity of IRDye 800CW RGD to U87 (glioblastoma) and 22Rv1 (prostate carcinoma) tumor cell lines. B) Binding of the IRDye 800CW RGD peptide was blocked by unlabeled RGD but not by a non-specific RAD peptide in U87 tumor cells. Nude mice bearing subcutaneous tumors, U87 (left hip) and A431(right hip), were imaged 24 hours post intravenous injection of IRDye 800CW RGD (1 nmole; C) or IRDye 800CW RGD (1 nmole) following a pre-injection 1 hour prior to an injection of unlabeled RGD peptide (100 nmoles; D) Images were captured on the Pearl^® Imager; 800 nm signal is presented in pseudo-color overlaid on a white light image of the mouse. The images are normalized to the same look-up-table.

Reference

Huang, R., Vider, J., Kovar, J. L., Olive, D. M., Mellinghoff, I. K., Mayer-Kuckuk, P., … Blasberg, R. G. (2012). Integrin αvβ3-targeted IRDye 800CW near-infrared imaging of glioblastoma. Clinical Cancer Research, 18(20), 5731–5740. doi: 10.1158/1078-0432.CCR-12-0374.

IRDye® 800CW RGD Optical Probe

Applications

Absorbance and Emission Spectra

Data Example

Reference

IRDye^® 800CW RGD Optical Probe