An Electrochemical Fiveplex Biochip Assay Based on Anti-Idiotypic Antibodies for Fast On-Site Detection of Bioterrorism Relevant Low Molecular Weight Toxins
| Autor: | Erwin Märtlbauer, Katharina Schulz, Christopher Pöhlmann, Richard Dietrich, Thomas Elßner |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Male
Aflatoxin aflatoxins bioterrorism Health Toxicology and Mutagenesis Immunoglobulins saxitoxin 02 engineering and technology Cross Reactions Toxicology medicine.disease_cause 01 natural sciences Antibodies Article multiplex on-site detection electrochemical biochip chemistry.chemical_compound Automation Epitopes Antibody Specificity Limit of Detection Lab-On-A-Chip Devices medicine trichothecenes Humans anti-idiotypic antibodies as epitope-mimicking reagents Chemical Warfare Agents Mycotoxin Biochip Toxins Biological Detection limit Saxitoxin Chromatography Chemistry Toxin 010401 analytical chemistry Screening assay Reproducibility of Results microcystins Electrochemical Techniques Equipment Design 021001 nanoscience & nanotechnology low molecular weight toxins 0104 chemical sciences Molecular Weight Anti-idiotypic antibodies 0210 nano-technology |
| Zdroj: | Toxins Volume 11 Issue 12 |
| ISSN: | 2072-6651 |
| DOI: | 10.3390/toxins11120696 |
| Popis: | Modern threats of bioterrorism force the need for multiple detection of biothreat agents to determine the presence or absence of such agents in suspicious samples. Here, we present a rapid electrochemical fiveplex biochip screening assay for detection of the bioterrorism relevant low molecular weight toxins saxitoxin, microcystin-LR, T-2 toxin, roridin A and aflatoxin B1 relying on anti-idiotypic antibodies as epitope-mimicking reagents. The proposed method avoids the use of potentially harmful toxin-protein conjugates usually mandatory for competitive immunoassays. The biochip is processed and analyzed on the automated and portable detection platform pBDi within 13.4 min. The fiveplex biochip assay revealed toxin group specificity to multiple congeners. Limits of detection were 1.2 ng/mL, 1.5 ng/mL, 0.4 ng/mL, 0.5 ng/mL and 0.6 ng/mL for saxitoxin, microcystin-LR, T-2 toxin, roridin A or aflatoxin B1, respectively. The robustness of the fiveplex biochip for real samples was demonstrated by detecting saxitoxin, microcystin-LR, HT-2 toxin, roridin A and aflatoxin B1 in contaminated human blood serum without elaborate sample preparation. Recovery rates were between 52&ndash 115% covering a wide concentration range. Thus, the developed robust fiveplex biochip assay can be used on-site to quickly detect one or multiple low molecular weight toxins in a single run. |
| Databáze: | OpenAIRE |
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