{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,17]],"date-time":"2026-01-17T19:10:20Z","timestamp":1768677020698,"version":"3.49.0"},"reference-count":25,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2019,1,2]],"date-time":"2019-01-02T00:00:00Z","timestamp":1546387200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["SFB902\/A2"],"award-info":[{"award-number":["SFB902\/A2"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"name":"FiF, TU Darmstadt","award":["Druckbare Biosensoren"],"award-info":[{"award-number":["Druckbare Biosensoren"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biosensors"],"abstract":"<jats:p>The excessive use of antibiotics in food-producing animals causes a steady rise of multiple antibiotic resistance in foodborne bacteria. Next to sulfonamides, the most common antibiotics groups are fluoroquinolones, aminoglycosides, and \u00df-lactams. Therefore, there is a need for a quick, efficient, and low-cost detection procedure for antibiotics. In this study, we propose an inkjet-printed aptamer-based biosensor developed for the detection of the fluoroquinolone ciprofloxacin. Due to their extraordinary high affinity and specificity, aptamers are already widely used in various applications. Here we present a ciprofloxacin-binding RNA aptamer developed by systematic evolution of ligands by exponential enrichment (SELEX). We characterized the secondary structure of the aptamer and determined the KD to 36 nM that allow detection of antibiotic contamination in a relevant range. We demonstrate that RNA aptamers can be inkjet-printed, dried, and resolved while keeping their functionality consistently intact. With this proof of concept, we are paving the way for a potential range of additional aptamer-based, printable biosensors.<\/jats:p>","DOI":"10.3390\/bios9010007","type":"journal-article","created":{"date-parts":[[2019,1,3]],"date-time":"2019-01-03T03:36:30Z","timestamp":1546486590000},"page":"7","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":29,"title":["Characterization and Inkjet Printing of an RNA Aptamer for Paper-Based Biosensing of Ciprofloxacin"],"prefix":"10.3390","volume":"9","author":[{"given":"Jeannine","family":"Jaeger","sequence":"first","affiliation":[{"name":"Department of Biology, Technische Universit\u00e4t Darmstadt, 64287 Darmstadt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Florian","family":"Groher","sequence":"additional","affiliation":[{"name":"Department of Biology, Technische Universit\u00e4t Darmstadt, 64287 Darmstadt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jacqueline","family":"Stamm","sequence":"additional","affiliation":[{"name":"Institute for Printing Science and Technology, Technische Universit\u00e4t Darmstadt, 64289 Darmstadt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9738-3025","authenticated-orcid":false,"given":"Dieter","family":"Spiehl","sequence":"additional","affiliation":[{"name":"Institute for Printing Science and Technology, Technische Universit\u00e4t Darmstadt, 64289 Darmstadt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Johannes","family":"Braun","sequence":"additional","affiliation":[{"name":"Department of Biology, Technische Universit\u00e4t Darmstadt, 64287 Darmstadt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Edgar","family":"D\u00f6rsam","sequence":"additional","affiliation":[{"name":"Institute for Printing Science and Technology, Technische Universit\u00e4t Darmstadt, 64289 Darmstadt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Beatrix","family":"Suess","sequence":"additional","affiliation":[{"name":"Department of Biology, Technische Universit\u00e4t Darmstadt, 64287 Darmstadt, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,1,2]]},"reference":[{"key":"ref_1","unstructured":"FDA (2017). 2016 Summary Report on Antimicrobials Sold or Distributed for Use in Food-Producing Animals, FDA."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Kivirand, K., Kagan, M., and Rinken, T. 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