TIPS AND STEP-BY-STEP PROTOCOL FOR THE OPTIMIZATION OF IMPORTANT FACTORS AFFECTING CELLULAR ENZYME-LINKED IMMUNOSORBENT ASSAY (CELISA)

• Published in: Journal of immunoassay & immunochemistry Vol. 22; no. 4; pp. 299 - 321
• Main Authors: Morandini, R., Boeynaems, J.-M., Wérenne, J., Ghanem, G.
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis Group 2001
• Subjects: Antigens, Surface - analysis; Buffers; Cell Adhesion; Cell Count; Cell Line, Tumor; Cells, Cultured; E-Selectin - analysis; E-Selectin - immunology; Enzyme-Linked Immunosorbent Assay - methods; Humans; Immunoenzyme Techniques; intercellular adhesion molecule 1; Intercellular Adhesion Molecule-1 - analysis; Intercellular Adhesion Molecule-1 - immunology; Mycoplasma - physiology; Time Factors; Trypsin - pharmacology
• ISSN: 1532-1819; 1532-4230
• DOI: 10.1081/IAS-100107397

CELISA, or cellular enzyme-linked immunosorbent assay, is a powerful and easy to use technique to study cell surface antigens under different stimulations. Nevertheless, some factors [11] must be discussed and optimized prior to reaching a reproducible CELISA. These include the choice of cell density, fixative agent, blocking agent, culture medium, optimal antibody dilutions, and incubation time. In this paper, we first present a short review of some references devoted to CELISA by means of a comparison of these parameters, followed by their description. Then, we describe and study these different parameters using practical examples comparing TNF-induced ICAM-1 expression as an end point, on HBL melanoma and HUVEC. These cell lines were also chosen because they differ in their ability to grow as discontinuous and continuous layers, respectively. Furthermore, we designed a comprehensive flow chart, as well as a complete step-by-step protocol for CELISA optimization.