SpringerBriefs in Applied Sciences and Technology
Series editors
Amit Kumar, Hyderabad, India Allam Appa Rao, Hyderabad, India
Forensic and Medical Bioinformatics
More information about this series at http://www.springer.com/series/11910
Samira Hosseini
•Patricia V ázquez-Villegas
Marco Rito-Palomares
•Sergio O. Martinez-Chapa
Enzyme-linked
Immunosorbent Assay (ELISA)
From A to Z
123
Samira Hosseini
Escuela de Ingeniería y Ciencias Tecnologico de Monterrey Monterrey, NL
Mexico
Patricia Vázquez-Villegas Escuela de Ingeniería y Ciencias Tecnologico de Monterrey Monterrey, NL
Mexico
Marco Rito-Palomares
Escuela de Medicina y Ciencias de Salud Tecnologico de Monterrey
Monterrey, NL Mexico
Sergio O. Martinez-Chapa Escuela de Ingeniería y Ciencias Tecnologico de Monterrey Monterrey, NL
Mexico
ISSN 2191-530X ISSN 2191-5318 (electronic)
SpringerBriefs in Applied Sciences and Technology
ISSN 2196-8845 ISSN 2196-8853 (electronic)
SpringerBriefs in Forensic and Medical Bioinformatics
ISBN 978-981-10-6765-5 ISBN 978-981-10-6766-2 (eBook)
https://doi.org/10.1007/978-981-10-6766-2 Library of Congress Control Number: 2017962065
© The Author(s) 2018
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Preface
ELISA: From A to Z was written aiming to provide Readers with a proper coverage of all aspects of ELISA from fundamentals of immune system and the history of the analytical assay prior to the invention of ELISA to the materials of choice for fabrication of the platforms, possible biomolecular interactions, different protocols, and evaluation parameters among the rest. This book guides Readers through dif- ferent steps of the analytical assay while familiarizing them with the possible sources of error in the assay. The book offers detailed insights on the immobi- lization techniques used for protein attachment, different methods for evaluation of the assay and calculation of the key important parameters in the analytical assay such as sensitivity, specificity, accuracy, and limit of detection. Advantages and shortages of the conventional ELISA as well as different attempts for improvement of its performance are covered in this book. Merging and intergrading different technologies with widely known ELISA have opened numerous windows of opportunity to the advancement of this immunoassay. In that respect, the current book provides the latest updates on integrated platforms such as ELISpot, plas- monic ELISA, sphere-/bead-based ELISAs, paper-/fiber-based ELISAs as well as ELISA in micro-devices.
Monterrey, Mexico Samira Hosseini
Patricia Vázquez-Villegas Marco Rito-Palomares Sergio O. Martinez-Chapa
v
Acknowledgements
Authors would like to acknowledge the financial support of Tecnológico de Monterrey, Mexico, for the special grant (grant number: 002EICII01) awarded by the Sensors and Devices Focus Group, School of Engineering and Sciences, Tecnológico de Monterrey, Monterrey, Mexico.
vii
Contents
1 Fundamentals and History of ELISA: The Evolution of the
Immunoassays Until Invention of ELISA . . . 1
1.1 Evolution of the Immunoassays Until Invention of ELISA . . . 1
1.1.1 Side Chain Theory. . . 1
1.1.2 Antigen-Antibody Binding Theory . . . 2
1.1.3 Discovery of Antibody Structure . . . 3
1.1.4 Invention of Radioimmunoassay (RIA). . . 3
1.1.5 Invention of Enzyme Linked Immunosorbent Assay (ELISA) . . . 4
1.2 Principles of the Immune System . . . 5
1.2.1 Antibody Production in Human Body. . . 5
1.2.2 Different Types of Antibodies . . . 5
1.2.3 Antigen-Antibody Coupling . . . 10
1.3 Biomolecular Interactions Between Antibody and Antigen . . . 11
1.3.1 Hydrogen Bonding . . . 11
1.3.2 Hydrophobic Interaction. . . 12
1.3.3 Ionic Attraction. . . 12
1.3.4 Van der Waals Forces . . . 14
References. . . 15
2 General Overviews on Applications of ELISA . . . 19
2.1 Applications of ELISA. . . 19
2.1.1 Food Industry . . . 19
2.1.2 Vaccine Development . . . 20
2.1.3 Immunology . . . 20
2.1.4 Diagnosis . . . 22
2.1.5 Toxicology . . . 24
2.1.6 Drug Monitoring and Pharmaceutical Industry. . . 25
2.1.7 Transplantation . . . 25
References. . . 26
ix
3 Step by Step with ELISA: Mechanism of Operation, Crucial Elements, Different Protocols, and Insights on Immobilization
and Detection of Various Biomolecular Entities . . . 31
3.1 Mechanism of Operation. . . 31
3.2 Different Elements of the Assay . . . 33
3.2.1 Solid Phase. . . 33
3.2.2 Adsorbents . . . 33
3.2.3 Washing Agents . . . 34
3.2.4 Blocking Agents . . . 34
3.2.5 Enzymes and Substrates. . . 34
3.2.6 Stopping Process. . . 40
3.2.7 Reading Techniques. . . 42
3.2.8 Reading Apparatus . . . 43
3.2.9 Controls . . . 44
3.3 Different Protocols . . . 45
3.3.1 Direct ELISA . . . 45
3.3.2 Indirect ELISA . . . 45
3.3.3 Sandwich ELISA. . . 45
3.3.4 Double Sandwich ELISA. . . 47
3.3.5 Competitive ELISA. . . 47
3.4 Initial Interaction of the Biomolecules with the Surface . . . 47
3.5 Immobilization Techniques for Protein Attachment. . . 49
3.5.1 Physical Immobilization. . . 49
3.5.2 Immobilization via Entrapment. . . 50
3.5.3 Covalent Immobilization . . . 50
3.5.4 Oriented Immobilization. . . 52
References. . . 53
4 Evaluation of the Detection Results Obtained from ELISA . . . 57
4.1 Conducting a Reliable Assay. . . 57
4.1.1 Sources of Errors. . . 58
4.1.2 Troubleshooting. . . 58
4.2 Key Parameters in ELISA Evaluation . . . 62
4.2.1 Sensitivity. . . 63
4.2.2 Specificity. . . 63
4.2.3 Accuracy. . . 63
4.2.4 Limit of Detection (LOD) . . . 64
4.3 Measurable Units in ELISA . . . 64
References. . . 65
5 Advantages, Disadvantages and Modifications of Conventional ELISA. . . 67
5.1 Significance of Conventional ELISA . . . 68
5.2 Shortages of Conventional ELISA. . . 68
x Contents
5.3 Materials of Choice for Fabrication of ELISA Well Plates . . . 69
5.4 Different Types of ELISA Well Plates. . . 70
5.5 Modified ELISA Platforms . . . 71
5.5.1 ELISA on Coated Platforms. . . 72
5.5.2 ELISpot . . . 74
5.5.3 Plasmonic ELISA . . . 76
5.5.4 Sphere-/Bead-Based ELISA . . . 80
5.5.5 Paper-Based ELISA. . . 84
5.5.6 Fiber-Based ELISA . . . 90
5.5.7 ELISA in Micro-Devices . . . 98
5.5.8 Other Strategies. . . 105
References. . . 108
Contents xi