Immobilization of E. coli with autodisplayed Z-domains to a surface-modified microplate for immunoassay

Gu Yoo, Min Park, Eun Hang Lee, Joachim Jose, Jae Chul Pyun

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Escherichia coli with autodisplayed Z-domains was reported to improve the sensitivity of immunoassays by the orientation control of antibodies. In this work, a sensitive microplate-based immunoassay is presented by immobilizing E. coli cells to a surface-modified microplate. The microplate was prepared by coating parylene-H film with formyl groups, and then covalently coupling poly-l-lysine to the parylene-H film. The E. coli cells were bound to the microplate by charge interactions between the negatively charged E. coli outer membrane and the positively charged microplate surface. In this work, the preparation of the microplate coated with poly-l-lysine is presented. The immobilization efficiency of E. coli to the modified surface was estimated to be far higher than non-specific interaction by fluorescence microscope and the optical transmittance of the modified microplate was measured to be feasible for immunoassay. The microplate-based immunoassay is demonstrated to be feasible for medical diagnosis of inflammatory diseases by using C-reactive protein as a target analyte for the medical diagnosis of inflammatory diseases.

Original languageEnglish
Pages (from-to)142-147
Number of pages6
JournalAnalytica Chimica Acta
Volume707
Issue number1-2
DOIs
Publication statusPublished - 2011 Nov 30

Fingerprint

immunoassay
microplate
Immunoassay
Immobilization
immobilization
Escherichia coli
Lysine
Opacity
C-Reactive Protein
Microscopes
Fluorescence
transmittance
Membranes
Coatings
Antibodies
antibody
coating
fluorescence
membrane
protein

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy

Cite this

Yoo, Gu ; Park, Min ; Lee, Eun Hang ; Jose, Joachim ; Pyun, Jae Chul. / Immobilization of E. coli with autodisplayed Z-domains to a surface-modified microplate for immunoassay. In: Analytica Chimica Acta. 2011 ; Vol. 707, No. 1-2. pp. 142-147.
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Immobilization of E. coli with autodisplayed Z-domains to a surface-modified microplate for immunoassay. / Yoo, Gu; Park, Min; Lee, Eun Hang; Jose, Joachim; Pyun, Jae Chul.

In: Analytica Chimica Acta, Vol. 707, No. 1-2, 30.11.2011, p. 142-147.

Research output: Contribution to journalArticle

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