A Technique to Detect Cyanobacterial Strains Using an Antibody Microarray Chip

Published: April 30, 2024

Abstract

Source: Blanco, Y. et al., Experimental Protocol for Detecting Cyanobacteria in Liquid and Solid Samples with an Antibody Microarray Chip. J. Vis. Exp. (2017)

This video demonstrates a method to detect the Cyanobacterial strains in an environmental sample using an antibody microarray chip. Samples carrying various bacteria interact with printed antibodies, and immunostaining with fluorophore-labeled anti-cyanobacterial-strain antibodies reveals the presence of specific cyanobacterial strains through fluorescence in distinct spots.

Protocol

1. Preparation of the Immunogens Grow each cyanobacterial strain in the corresponding culture medium under conditions described in Table 1.   NOTE: Growth medium and culture conditions for each cyanobacteria strain are listed in Table 1. All the cyanobacterial strains, with the exception of K17, belong to Antonio Quesada's group from Autonoma University (Madrid, Spain). The antibody against&#1…

Offenlegungen

The authors have nothing to disclose.

Materials

0.22 mm pore diameter filters Millipore GSWP04700 For preparation of immunogens
Eppendorf  5424R microcentrifuge Fisher Scientific For preparation of immunogens
Phosphate buffer saline (PBS) pH 7.4 (10X) Thermofisher Scientific 70011036 50 mM potassium phosphate, 150 mM NaCl, pH 7.4
Ultrasonic processor UP50H Hielscher For preparation of immunogens
Complete Freund's adjuvant  Sigma-Aldrich F5881 Immunopotentiator
Incomplete Freud's adjuvant Sigma-Aldrich  F5506 For boost injections
Protein A antibody purification kit   Sigma-Aldrich PURE1A  For isolation of IgG
Centrifugal filter devices MWCO<100 KDa Millipore UFC510096-96K For isolation of IgG
Dialysis tubings, benzoylated Sigma-Aldrich D7884-10FT For isolation of IgG
Illustra Microspin G-50 columns  GE-HealthCare GE27-5330-02 For isolation of IgG
Bradford reagent Sigma-Aldrich B6916-500 mL To quantify the antibody concentration
MicroBCA protein assay kit  Thermo Scientific 23235 To quantify the antibody concentration
Protein arraying buffer 2X Whatman (Sigma Aldrich)  S00537 Printing buffer; 30-40% glycerol in 1X PBS with 0.01% Tween 20
Tween 20  Sigma-Aldrich  P9416 Non-ionic detergent
Bovine serum albumin (BSA) Sigma-Aldrich  A9418 Control  for printing; blocking reagent
384-wells microplate Genetix X6004 For antibody printing
Robot arrayer for multiple slides MicroGrid II TAS arrayer from Digilab For antibody printing
Epoxy substrate glass slides Arrayit corporation VEPO25C Solid support for antibody printing
Alexa Fluor-647 Succinimidyl-ester  Molecular probes A20006 Fluorochrome
DMSO  Sigma-Aldrich  D8418 Fluorochrome dissolvent
Heidolph Titramax vibrating platform shaker Fisher Scientific For antibody labeling 
Illustra Microspin G-50 columns  Healthcare 27-5330-01 For purification of labeled antibodies
Safe seal brown 0,5 ml tubes Sarstedt 7,27,04,001 For labeled antibodies storage 
Nanodrop 1000 spectrophotometer Thermo Scientific To quantify antibody concentration and labeling efficiency
3 µm pore size polycarbonate 47 mm diameter filter Millipore TMTP04700 To concentrate cells
1M Trizma hydrochloride solution pH 8 Sigma-Aldrich  T3038 For TBSTRR preparation; to block slides
Sodium chloride Sigma-Aldrich  S7653 For TBSTRR preparation
20 µm nylon filters  Millipore NY2004700 For environmental extract preparation
10-12 mm filter holders Millipore SX0001300 For environmental extract preparation
Protease inhibitor cocktail Sigma-Aldrich  P8340 For environmental extract storage
1M Trizma hydrochloride solution pH 9 Sigma-Aldrich  T2819 To block slides
Heidolph Duomax 1030 rocking platform shaker VWR To block slides; for incubation processes 
VWR Galaxy miniarray microcentrifuge VWR C1403-VWR To dry slides
Multi-Well microarray hybridization cassette Arrayit corporation AHC1X24 Cassette for 24 assays per slide
GenePix 4100A microarray scanner  Molecular Devices Scanner for fluorescence
GenePix Pro Software Molecular Devices Software for image analysis and quantification

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Diesen Artikel zitieren
A Technique to Detect Cyanobacterial Strains Using an Antibody Microarray Chip. J. Vis. Exp. (Pending Publication), e22124, doi: (2024).

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