PMID- 37355210 OWN - NLM STAT- MEDLINE DCOM- 20230821 LR - 20230822 IS - 1873-4995 (Electronic) IS - 0168-3659 (Linking) VI - 360 DP - 2023 Aug TI - Anti-PEG IgM production induced by PEGylated liposomes as a function of administration route. PG - 285-292 LID - S0168-3659(23)00400-5 [pii] LID - 10.1016/j.jconrel.2023.06.027 [doi] AB - Modifying the surface of nanoparticles with polyethylene glycol (PEG) is a commonly used approach for improving the in vitro stability of nanoparticles such as liposomes and increasing their circulation half-lives. We have demonstrated that, in certain conditions, an intravenous (i.v.) injection of PEGylated liposomes (PEG-Lip) induced anti-PEG IgM antibodies, which led to rapid clearance of second doses in mice. SARS-CoV-2 vaccines, composed of mRNA-containing PEGylated lipid nanoparticles, have been widely administered as intramuscular (i.m.) injections, so it is important to determine if PEGylated formulations can induce anti-PEG antibodies. If the favorable properties that PEGylation imparts to therapeutic nanoparticles are to be widely applicable this should apply to various routes of administration. However, there are few reports on the effect of different administration routes on the in vivo production of anti-PEG IgM. In this study, we investigated anti-PEG IgM production in mice following i.m., intraperitoneal (i.p.) and subcutaneous (s.c.) administration of PEG-Lip. PEG-Lip appeared to induce anti-PEG IgM by all the tested routes of administration, although the lipid dose causing maximum responses varied. Splenectomy attenuated the anti-PEG IgM production for all routes of administration, suggesting that splenic immune cells may have contributed to anti-PEG IgM production. Interestingly, in vitro experiments indicated that not only splenic cells but also cells in the peritoneal cavity induced anti-PEG IgM following incubation with PEG-Lip. These observations confirm previous experiments that have shown that measurable amounts of PEG-Lip administered i.p., i.m. or s.c. are absorbed to some extent into the blood circulation, where they can be distributed to the spleen and/or peritoneal cavity, and are recognized by B cells, triggering anti-PEG IgM production. The results obtained in this study have important implications for developing efficient PEGylated nanoparticular delivery system. CI - Copyright (c) 2023 Elsevier B.V. All rights reserved. FAU - Takata, Haruka AU - Takata H AD - Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, 1-78-1, Sho-machi, Tokushima 770-8505, Japan. FAU - Shimizu, Taro AU - Shimizu T AD - Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, 1-78-1, Sho-machi, Tokushima 770-8505, Japan. FAU - Yamade, Rina AU - Yamade R AD - Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, 1-78-1, Sho-machi, Tokushima 770-8505, Japan. FAU - Elsadek, Nehal E AU - Elsadek NE AD - Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt. FAU - Emam, Sherif E AU - Emam SE AD - Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, 1-78-1, Sho-machi, Tokushima 770-8505, Japan; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt. FAU - Ando, Hidenori AU - Ando H AD - Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, 1-78-1, Sho-machi, Tokushima 770-8505, Japan. FAU - Ishima, Yu AU - Ishima Y AD - Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, 1-78-1, Sho-machi, Tokushima 770-8505, Japan. FAU - Ishida, Tatsuhiro AU - Ishida T AD - Department of Pharmacokinetics and Biopharmaceutics, Institute of Biomedical Sciences, Tokushima University, 1-78-1, Sho-machi, Tokushima 770-8505, Japan. Electronic address: ishida@tokushima-u.ac.jp. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230629 PL - Netherlands TA - J Control Release JT - Journal of controlled release : official journal of the Controlled Release Society JID - 8607908 RN - 3WJQ0SDW1A (Polyethylene Glycols) RN - 0 (Liposomes) RN - 0 (COVID-19 Vaccines) RN - 0 (Immunoglobulin M) SB - IM MH - Mice MH - Animals MH - Humans MH - *Polyethylene Glycols MH - Liposomes MH - COVID-19 Vaccines MH - Immunoglobulin M MH - *COVID-19 MH - SARS-CoV-2 OTO - NOTNLM OT - Administration route OT - Anti-PEG IgM OT - PEGylated nanoparticles OT - Polyethylene glycol (PEG) OT - T cell independent (TI) antigen COIS- Declaration of Competing Interest None. EDAT- 2023/06/25 01:08 MHDA- 2023/08/21 06:42 CRDT- 2023/06/24 19:17 PHST- 2023/03/12 00:00 [received] PHST- 2023/06/04 00:00 [revised] PHST- 2023/06/18 00:00 [accepted] PHST- 2023/08/21 06:42 [medline] PHST- 2023/06/25 01:08 [pubmed] PHST- 2023/06/24 19:17 [entrez] AID - S0168-3659(23)00400-5 [pii] AID - 10.1016/j.jconrel.2023.06.027 [doi] PST - ppublish SO - J Control Release. 2023 Aug;360:285-292. doi: 10.1016/j.jconrel.2023.06.027. Epub 2023 Jun 29.