PMID- 36551893 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20221225 IS - 2227-9059 (Print) IS - 2227-9059 (Electronic) IS - 2227-9059 (Linking) VI - 10 IP - 12 DP - 2022 Dec 5 TI - Polyelectrolyte Coating of Ferumoxytol Differentially Impacts the Labeling of Inflammatory and Steady-State Dendritic Cell Subtypes. LID - 10.3390/biomedicines10123137 [doi] LID - 3137 AB - Engineered magnetic nanoparticles (MNPs) are emerging as advanced tools for medical applications. The coating of MNPs using polyelectrolytes (PEs) is a versatile means to tailor MNP properties and is used to optimize MNP functionality. Dendritic cells (DCs) are critical regulators of adaptive immune responses. Functionally distinct DC subsets exist, either under steady-state or inflammatory conditions, which are explored for the specific treatment of various diseases, such as cancer, autoimmunity, and transplant rejection. Here, the impact of the PE coating of ferumoxytol for uptake into both inflammatory and steady-state DCs and the cellular responses to MNP labeling is addressed. Labeling efficiency by uncoated and PE-coated ferumoxytol is highly variable in different DC subsets, and PE coating significantly improves the labeling of steady-state DCs. Uncoated ferumoxytol results in increased cytotoxicity of steady-state DCs after labeling, which is abolished by the PE coating, while no increased cell death is observed in inflammatory DCs. Furthermore, uncoated and PE-coated ferumoxytol appear immunologically inert in inflammatory DCs, but they induce activation of steady-state DCs. These results show that the PE coating of MNPs can be applied to endow particles with desired properties for enhanced uptake and cell type-specific responses in distinct target DC populations. FAU - Celikkin, Nehar AU - Celikkin N AUID- ORCID: 0000-0001-8858-2057 AD - Institute for Biomedical Engineering, Department of Cell Biology, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany. AD - Helmholtz Institute for Biomedical Engineering, RWTH Aachen University, Pauwelsstrasse 20, 52074 Aachen, Germany. FAU - Wong, John E AU - Wong JE AD - Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany. FAU - Zenke, Martin AU - Zenke M AUID- ORCID: 0000-0002-1107-3251 AD - Institute for Biomedical Engineering, Department of Cell Biology, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany. AD - Helmholtz Institute for Biomedical Engineering, RWTH Aachen University, Pauwelsstrasse 20, 52074 Aachen, Germany. FAU - Hieronymus, Thomas AU - Hieronymus T AUID- ORCID: 0000-0002-7879-6518 AD - Institute for Biomedical Engineering, Department of Cell Biology, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany. AD - Helmholtz Institute for Biomedical Engineering, RWTH Aachen University, Pauwelsstrasse 20, 52074 Aachen, Germany. AD - Institute for Cell and Tumor Biology, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany. LA - eng PT - Journal Article DEP - 20221205 PL - Switzerland TA - Biomedicines JT - Biomedicines JID - 101691304 PMC - PMC9776020 OTO - NOTNLM OT - dendritic cells OT - ferumoxytol OT - nanoparticles OT - polyelectrolytes OT - tracking COIS- The authors declare no conflict of interest. EDAT- 2022/12/24 06:00 MHDA- 2022/12/24 06:01 PMCR- 2022/12/05 CRDT- 2022/12/23 01:12 PHST- 2022/11/10 00:00 [received] PHST- 2022/12/02 00:00 [revised] PHST- 2022/12/03 00:00 [accepted] PHST- 2022/12/23 01:12 [entrez] PHST- 2022/12/24 06:00 [pubmed] PHST- 2022/12/24 06:01 [medline] PHST- 2022/12/05 00:00 [pmc-release] AID - biomedicines10123137 [pii] AID - biomedicines-10-03137 [pii] AID - 10.3390/biomedicines10123137 [doi] PST - epublish SO - Biomedicines. 2022 Dec 5;10(12):3137. doi: 10.3390/biomedicines10123137.