title: Photostable luminescent nanoparticles as biological label for cell recognition of system lupus erythematosus patients.
abstract: In this article, we report a method for cell recognition of system lupus erythematosus (SLE) patients that uses photostable luminescent nanoparticles as biological labels. The luminescent silica nanoparticles are prepared with a water-in-oil microemulsion (W/O) technique. The silica network is produced by the controlled hydrolysis of tetraethylorthosilicate (TEOS) in water nanodroplets with the initiation of ammonia (NH3.H2O). A luminescent compound, tris(2,2'-bipyridyl)dichlororuthenium(II)hexahydrate [Ru(II)(bpy)3]2+, is doped inside as a luminescent signaling element, and the most appropriate dye concentration for the preparation of the nanoparticles with a size of 28 +/- 4 nm has been determined. The luminescent silica nanoparticles are covalently immobilized with goat anti-human immunoglobulin G (IgG), which can recognize SmIgG+ B lymphocytes. We have used antibody-labeled nanoparticles to recognize target SmIgG+ B lymphocytes isolated from the circulating blood of SLE patients. It has been observed that a bioassay based on fluorescent nanoparticles can identify target cells selectively and efficiently. And fluorescent nanoparticle labels also exhibit high photostability. The experiment results have shown that this cell recognition method was an effective one as further proof of the diagnosis of SLE.
authors.affiliation: College of Chemistry & Chemical Engineering, National Key Laboratory of Chemical and Biological Sensing & Chemometrics, Institute of Biological Technology, Hunan University, Changsha, People's Republic of China.
authors.forename: Xiaoxiao
authors.initials: X
authors.lastname: He
authors.forename: Kemin
authors.initials: K
authors.lastname: Wang
authors.forename: Weihong
authors.initials: W
authors.lastname: Tan
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Xiaohai
authors.initials: X
authors.lastname: Yang
authors.forename: Shasheng
authors.initials: S
authors.lastname: Huang
authors.forename: Du
authors.initials: D
authors.lastname: Li
authors.forename: Dan
authors.initials: D
authors.lastname: Xiao
mesh_terms: D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives*; D000911:Antibodies, Monoclonal; D001402:B-Lymphocytes / Q000473:pathology; D015415:Biomarkers / Q000097:blood; D020099:Coated Materials, Biocompatible / Q000138:chemical synthesis; D056831:Coordination Complexes; D006801:Humans; D049449:Luminescence; D008180:Lupus Erythematosus, Systemic / Q000097:blood / Q000473:pathology*; D008856:Microscopy, Fluorescence / Q000379:methods; D008863:Microspheres; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D010777:Photochemistry / Q000379:methods; D012822:Silicon Dioxide / Q000138:chemical synthesis / Q000737:chemistry*; D013194:Staining and Labeling / Q000379:methods*; D017975:Ruthenium Compounds
chemical_list: D015082:2,2'-Dipyridyl; D000911:Antibodies, Monoclonal; D015415:Biomarkers; D020099:Coated Materials, Biocompatible; D056831:Coordination Complexes; D012822:Silicon Dioxide; C547232:tris(2,2-bipyridine)-ruthenium(II); D017975:Ruthenium Compounds