{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,11]],"date-time":"2026-06-11T18:45:16Z","timestamp":1781203516544,"version":"3.54.1"},"reference-count":34,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2022,12,2]],"date-time":"2022-12-02T00:00:00Z","timestamp":1669939200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Science Centre","award":["2018\/29\/B\/ST4\/00178"],"award-info":[{"award-number":["2018\/29\/B\/ST4\/00178"]}]},{"name":"Warsaw University of Technology","award":["2018\/29\/B\/ST4\/00178"],"award-info":[{"award-number":["2018\/29\/B\/ST4\/00178"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>The growing interest in superparamagnetic iron oxide nanoparticles (SPIONs) as potential theranostic agents is related to their unique properties and the broad range of possibilities for their surface functionalization. However, despite the rapidly expanding list of novel SPIONs with potential biomedical applications, there is still a lack of methodologies that would allow in-depth investigation of the interactions of those nanoparticles with biological compounds in human serum. Herein, we present attempts to employ capillary electrophoresis-inductively coupled plasma tandem mass spectrometry (CE-ICP-MS\/MS) for this purpose and various obstacles and limitations noticed during the research. The CE and ICP-MS\/MS parameters were optimized, and the developed method was used to study the interactions of two different proteins (albumin and transferrin) with various synthesized SPIONs. While the satisfactory resolution between proteins was obtained and the method was applied to examine individual reagents, it was revealed that the conjugates formed during the incubation of the proteins with SPIONs were not stable under the conditions of electrophoretic separation.<\/jats:p>","DOI":"10.3390\/molecules27238442","type":"journal-article","created":{"date-parts":[[2022,12,2]],"date-time":"2022-12-02T03:55:37Z","timestamp":1669953337000},"page":"8442","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Red Flags and Adversities on the Way to the Robust CE-ICP-MS\/MS Quantitative Monitoring of Self-Synthesized Magnetic Iron Oxide(II, III)-Based Nanoparticle Interactions with Human Serum Proteins"],"prefix":"10.3390","volume":"27","author":[{"given":"Jacek","family":"Sikorski","sequence":"first","affiliation":[{"name":"Chair of Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego St. 3, 00-664 Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcin","family":"Drozd","sequence":"additional","affiliation":[{"name":"Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego St. 3, 00-664 Warsaw, Poland"},{"name":"Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, Poleczki St. 19, 02-822 Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5631-8163","authenticated-orcid":false,"given":"Magdalena","family":"Matczuk","sequence":"additional","affiliation":[{"name":"Chair of Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego St. 3, 00-664 Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,2]]},"reference":[{"key":"ref_1","unstructured":"(2022, November 17). 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