Protein array consisting of sol-gel bioactive platform for detection of E-coli O157:H7

被引:31
作者
Lee, W
Park, KS
Kim, YW
Lee, WH
Choi, JW
机构
[1] Sogang Univ, Dept Chem & Biomol Engn, Seoul 121742, South Korea
[2] Sogang Univ, Interdisciplinary Program Integrated Biotechnol, Seoul 121742, South Korea
关键词
bioactive platform; sol-gel technique; protein array; antibody immobilization; E. coli O157 : H7;
D O I
10.1016/j.bios.2004.11.010
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
Sol-gel-derived bioactive platform was fabricated for detection of pathogenic microbes, E. coli O15:H7. Design flexibility of sol-gel technique and ease of fabrication can fulfill to create the surfaces with structural and chemical features that are compatible with biomaterials such as antibody, enzymes, etc. In this study, the bioactive platform was prepared based on the silica gels, which were produced by hydrolyzing tetraethylorthosilane (TEOS) in ethanol. The mercaptopropyl triethoxysilane (MPTS) was mixed with the TEOS solution for the surface functionalization of bioactive platform. During TEOS hydrolysis, the modified thin film was prepared by sol-gel dip coating. Antibody against E. coli O15:H7 was immobilized with a configuration of protein array using piezo-type dispensing system. Surface morphology of the prepared bioactive platform was analyzed using atomic force microscopy (AFM). The antibody-antigen interaction was investigated with fluorescence microscopy and sandwich type immunoassay using fluorescein isothiocyanate (FITC)-labeled antibody. The results showed that antibody was sequestered within the sol-gel-derived bio-gel due to physical adsorption. The measurement of E. coli O157:H7 was done using the fabricated antibody surface. The fluorescence intensity was proportional to the concentration of E. coli O157:H7, of which the detection limit was 10(2) CFU/ml. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:2292 / 2299
页数:8
相关论文
共 26 条
[1]   Immunosensor for detection of Yersinia enterocolitica based on imaging ellipsometry [J].
Bae, YM ;
Oh, BK ;
Lee, W ;
Lee, WH ;
Choi, JW .
ANALYTICAL CHEMISTRY, 2004, 76 (06) :1799-1803
[2]  
CASS T, 1998, IMMOBILIZED BIOMOLEC
[3]   Nanoscale fabrication of biomolecular layer and its application to biodevices [J].
Choi, JW ;
Nam, YS ;
Fujihira, M .
BIOTECHNOLOGY AND BIOPROCESS ENGINEERING, 2004, 9 (02) :76-85
[4]   DNA chips: a new tool for genetic analysis and diagnostics [J].
Cuzin, M .
TRANSFUSION CLINIQUE ET BIOLOGIQUE, 2001, 8 (03) :291-296
[5]   Bioencapsulation within synthetic polymers (Part 1): sol-gel encapsulated biologicals [J].
Gill, I ;
Ballesteros, A .
TRENDS IN BIOTECHNOLOGY, 2000, 18 (07) :282-296
[6]  
HADJI FB, 1986, J NONCRYST SOLIDS, P417
[7]   A concise guide to cDNA microarray analysis [J].
Hegde, P ;
Qi, R ;
Abernathy, K ;
Gay, C ;
Dharap, S ;
Gaspard, R ;
Hughes, JE ;
Snesrud, E ;
Lee, N ;
Quackenbush, J .
BIOTECHNIQUES, 2000, 29 (03) :548-+
[8]   Stable sol-gel microstructured and microfluidic networks for protein patterning [J].
Kim, YD ;
Park, CB ;
Clark, DS .
BIOTECHNOLOGY AND BIOENGINEERING, 2001, 73 (05) :331-337
[9]   Nonspecific amine immobilization of ligand can be a potential source of error in BIAcore binding experiments and may reduce binding affinities [J].
Kortt, AA ;
Oddie, GW ;
Iliades, P ;
Gruen, LC ;
Hudson, PJ .
ANALYTICAL BIOCHEMISTRY, 1997, 253 (01) :103-111
[10]   Solid supports for microarray immunoassays [J].
Kusnezow, W ;
Hoheisel, JD .
JOURNAL OF MOLECULAR RECOGNITION, 2003, 16 (04) :165-176