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Accelerated blood clearance phenomenon upon cross-administration of PEGylated nanocarriers in beagle dogs

Authors Wang CL, Cheng XB, Su YQ, Pei Y, Song YZ, Jiao J, Huang ZJ, Ma YF, Dong YM, Yao Y, Fan JJ, Ta H, Liu XR, Xu H, Deng YH

Received 9 February 2015

Accepted for publication 29 March 2015

Published 14 May 2015 Volume 2015:10(1) Pages 3533—3545

DOI https://doi.org/10.2147/IJN.S82481

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 7

Editor who approved publication: Dr Lei Yang

Chunling Wang,1 Xiaobo Cheng,2 Yuqing Su,1 Ying Pei,3 Yanzhi Song,1 Jiao Jiao,1 Zhenjun Huang,1 Yanfei Ma,1 Yinming Dong,1 Ying Yao,1 Jingjing Fan,1 Han Ta,1 Xinrong Liu,1 Hui Xu,1 Yihui Deng1

1College of Pharmacy, Shenyang Pharmaceutical University, Shenyang, People’s Republic of China; 2Deli Wei Biological Technology Co, Ltd, Beijing, People’s Republic of China; 3Shenyang Women’s and Children’s Hospital, Shenyang, People’s Republic of China

Abstract: The cross-administration of nanocarriers modified by poly(ethylene glycol) (PEG), named PEGylated nanocarriers, a type of combination therapy, is becoming an increasingly important method of long-term drug delivery, to decrease side effects, avoid multidrug resistance, and increase therapeutic efficacy. However, repeated injections of PEGylated nanocarriers induces the accelerated blood clearance (ABC) phenomenon, prevents long circulation, and can cause adverse effects owing to alterations in the biodistribution of the drug. Although the nature of the ABC phenomenon that is induced by repeated injections of PEGylated nanocarriers has already been studied in detail, there are few reports on the immune response elicited by the cross-administration of PEGylated nanocarriers. In this study, we investigated the ABC phenomenon induced by the intravenous cross-administration of various PEGylated nanocarriers, including PEGylated liposomes (PL), PEG micelles (PM), PEGylated solid lipid nanoparticles (PSLN), and PEGylated emulsions (PE), in beagle dogs. The results indicated that the magnitude of the immune response elicited by the cross-administration was in the following order (from the strongest to the weakest): PL, PE, PSLN, PM. It is specifically PEG in the brush structure that elicits a significant immune response, in both the induction phase and the effectuation phase. Furthermore, the present study suggests that there is a considerable difference between the effect of repeated injections and cross-administration, depending on the colloidal structure. This work is a preliminary investigation into the cross-administration of PEGylated nanocarriers, and our observations can have serious implications for the design of combination therapies that use PEGylated vectors.

Keywords: ABC phenomenon, repeated injection, cross-administration, immune response, PEGylated nanocarriers

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