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J Control Release. 2018 Jun 10;279:89-98. doi: 10.1016/j.jconrel.2018.04.006. Epub 2018 Apr 9.

Self-assembled hyaluronic acid nanoparticles: Implications as a nanomedicine for treatment of type 2 diabetes.

Author information

1
Department of Molecular Science & Technology, Ajou University, Suwon 16499, Republic of Korea.
2
School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea.
3
Department of Biochemistry, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea.
4
Department of Pharmacology, Ajou University School of Medicine, Suwon 16499, Republic of Korea.
5
School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea; Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon 16419, Republic of Korea. Electronic address: jhpark1@skku.edu.
6
Department of Molecular Science & Technology, Ajou University, Suwon 16499, Republic of Korea. Electronic address: wookkim21@ajou.ac.kr.

Abstract

Self-assembled hyaluronic acid nanoparticles (HA-NPs) have been extensively investigated for biomedical and pharmaceutical applications owing to their biocompatibility and receptor-binding properties. Here, we report that an empty HA-NP itself not bearing any drug has therapeutic effects on adipose tissue inflammation and insulin resistance. HA-NPs inhibited not only the receptor-mediated internalization of low-molecular-weight (LMW) free HA but also LMW free HA-induced pro-inflammatory gene expression in mouse primary bone marrow-derived macrophages (BMDMs) isolated from wild-type mice, but not in CD44-null (CD44-/-) BMDMs. An in vivo biodistribution study showed the distribution of HA-NPs and their co-localization with CD44 in adipose tissues including epididymal white adipose tissues (eWATs), but these were rarely observed in the eWATs of CD44-/- mice. In addition, CD44 expression and HA-NP accumulation in the eWATs were increased in mice with diet-induced obesity (DIO) compared to lean mice. Interestingly, treatment with HA-NPs in DIO mice suppressed adipose tissue inflammation as indicated by reduced macrophage content, the production of proinflammatory cytokines and NLRP3 inflammasome activity in eWATs, leading to improved insulin sensitivity and normalized blood glucose levels. Collectively, these results suggest that an empty HA-NP itself can be a therapeutic agent for the treatment of type 2 diabetes.

KEYWORDS:

Hyaluronic acid; Inflammation; Insulin resistance; Nanomedicine; Self-assembled nanoparticles; Type 2 diabetes

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