title: Fibrin-binding, peptide amphiphile micelles for targeting glioblastoma.
abstract: Glioblastoma-targeted drug delivery systems facilitate efficient delivery of chemotherapeutic agents to malignant gliomas, while minimizing systemic toxicity and side effects. Taking advantage of the fibrin deposition that is characteristic of tumors, we constructed spherical, Cy7-labeled, targeting micelles to glioblastoma through the addition of the fibrin-binding pentapeptide, cysteine-arginine-glutamic acid-lysine-alanine, or CREKA. Conjugation of the CREKA peptide to Cy7-micelles increased the average particle size and zeta potential. Upon intravenous administration to GL261 glioma bearing mice, Cy7-micelles passively accumulated at the brain tumor site via the enhanced permeability and retention (EPR) effect, and Cy7-CREKA-micelles displayed enhanced tumor homing via active targeting as early as 1 h after administration, as confirmed via in vivo and ex vivo imaging and immunohistochemistry. Biodistribution of micelles showed an accumulation within the liver and kidneys, leading to micelle elimination via renal clearance and the reticuloendothelial system (RES). Histological evaluation showed no signs of cytotoxicity or tissue damage, confirming the safety and utility of this nanoparticle system for delivery to glioblastoma. Our findings offer strong evidence for the glioblastoma-targeting potential of CREKA-micelles and provide the foundation for CREKA-mediated, targeted therapy of glioma.
authors.affiliation: Institute for Molecular Engineering, The University of Chicago, 5747 S. Ellis Ave. Jones 222, Chicago, IL 60637, USA.
authors.forename: Eun Ji
authors.initials: EJ
authors.lastname: Chung
authors.forename: Yu
authors.initials: Y
authors.lastname: Cheng
authors.forename: Ramin
authors.initials: R
authors.lastname: Morshed
authors.forename: Kathryn
authors.initials: K
authors.lastname: Nord
authors.forename: Yu
authors.initials: Y
authors.lastname: Han
authors.forename: Michelle L
authors.initials: ML
authors.lastname: Wegscheid
authors.forename: Brenda
authors.initials: B
authors.lastname: Auffinger
authors.forename: Derek A
authors.initials: DA
authors.lastname: Wainwright
authors.forename: Maciej S
authors.initials: MS
authors.lastname: Lesniak
authors.forename: Matthew V
authors.initials: MV
authors.lastname: Tirrell
mesh_terms: D000818:Animals; D001921:Brain / Q000378:metabolism; D001932:Brain Neoplasms / Q000188:drug therapy* / Q000378:metabolism; D002232:Carbocyanines / Q000737:chemistry / Q000378:metabolism; D004337:Drug Carriers / Q000737:chemistry / Q000378:metabolism*; D016503:Drug Delivery Systems; D005337:Fibrin / Q000378:metabolism*; D005909:Glioblastoma / Q000188:drug therapy* / Q000378:metabolism; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008823:Micelles; D009842:Oligopeptides / Q000737:chemistry / Q000378:metabolism*
chemical_list: D002232:Carbocyanines; D004337:Drug Carriers; D008823:Micelles; D009842:Oligopeptides; C542438:cysteinyl-arginyl-glutamyl-lysyl-alanyl; C501744:indotricarbocyanine; D005337:Fibrin
keywords: Brain; Diagnostic; Glioblastoma; Micelle; Self-assembly; Targeting