title: Tissue distribution of polybutylcyanoacrylate nanoparticles loaded with spin-labelled nitrosourea in Lewis lung carcinoma-bearing mice.
abstract: The tissue distribution of polybutylcyanoacrylate nanoparticles (PBCN) with a diameter of 127 nm, loaded with 1-(2-chloroethyl)-3-(1-oxyl-2,2,6,6-tetramethylpiperidinyl)-1- nitrosourea (spin-labelled nitrosourea, SLCNU) is described. PBCN-suspensions were intraperitoneally (i.p.) injected into Lewis lung carcinoma bearing mice. The biodistribution of PBCN in the visceral organs, blood and tumor was studied by electron spin resonance (ESR) spectroscopy. A relatively low accumulation of nanoparticles in the liver and spleen was found. The accumulation was negligible in the i.m. implanted primary tumor. SLCNU-loaded nanoparticles were mainly found in the lungs, kidneys, and heart. The highest content of the particles studied was observed in the lungs of tumor bearing experimental animals damaged by metastases. These findings suggest that PBCN offer some opportunities in the targeting of SLCNU to lung metastases.
authors.affiliation: Scientific Research Centre for Speciality Polymers, Sofia, Bulgaria.
authors.forename: M
authors.initials: M
authors.lastname: Simeonova
authors.forename: T
authors.initials: T
authors.lastname: Ivanova
authors.forename: Z
authors.initials: Z
authors.lastname: Raikov
authors.forename: H
authors.initials: H
authors.lastname: Konstantinov
mesh_terms: D000818:Animals; D003497:Cyclic N-Oxides / Q000008:administration & dosage / Q000493:pharmacokinetics*; D004578:Electron Spin Resonance Spectroscopy; D004659:Enbucrilate / Q000493:pharmacokinetics*; D005038:Ethylnitrosourea / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000493:pharmacokinetics; D007274:Injections, Intraperitoneal; D008099:Liver / Q000378:metabolism; D008175:Lung Neoplasms / Q000378:metabolism* / Q000556:secondary; D051379:Mice; D008810:Mice, Inbred C57BL; D008863:Microspheres; D010316:Particle Size; D013113:Spin Labels; D013154:Spleen / Q000378:metabolism; D014018:Tissue Distribution
chemical_list: D003497:Cyclic N-Oxides; D013113:Spin Labels; C045032:1-(2-chloroethyl)-3-(1-oxyl-2,2,6,6-tetramethylpiperidinyl)-1-nitrosourea; D004659:Enbucrilate; D005038:Ethylnitrosourea