4.5 Article

Tanshinone IIA-Loaded Micelles Functionalized with Rosmarinic Acid: A Novel Synergistic Anti-Inflammatory Strategy for Treatment of Atherosclerosis

Journal

JOURNAL OF PHARMACEUTICAL SCIENCES
Volume 111, Issue 10, Pages 2827-2838

Publisher

ELSEVIER SCIENCE INC
DOI: 10.1016/j.xphs.2022.05.007

Keywords

Atherosclerosis; Rosmarinic acid; Tanshinone IIA; Micelles; Synergistic

Funding

  1. National Natural Sci-ence Foundation of China [81973513, 81603326]
  2. Natural Science Foundation of Shandong Province [ZR2016HB58]

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The micelles of PPSPEG-RA@TA could effectively inhibit endothelial cell proliferation, reduce the expression of VCAM-1, thereby alleviating inflammation and reducing endothelial cell damage. After one month of intravenous injection, the plaque area in murine aortic vessels was significantly reduced without serious toxic side-effects, showing excellent biocompatibility.
Rosmarinic acid (RA) and tanshinone IIA (TA) which are effective components in Salvia miltiorrhiza show anti-inflammatory potential against atherosclerosis. Based on polysulfated propylene-polyethylene glycol (PPS-PEG), RA was grafted onto this polymer via amide bonds to form a micelle carrier for TA encapsulation: PPS-PEG-RA@TA. A potent inhibitory effect on lipopolysaccharide (LPS) -induced proliferation of endothelial cells with significant intracellular uptake was observed with this system. This could have been the result of release of TA in a reactive oxygen species (ROS) environment and stronger antioxidant effect of RA. The synergistic effect was optimized when the combination was used in a molar ratio of 1:1. Mechanistic studies showed that, compared with PPS-PEG-RA and TA+RA, PPS-PEG-RA@TA micelles could more effectively regulate the nuclear factor-kappa B (NF-KB) pathway to reduce expression of vascular cell adhesion molecule-1 (VCAM-1), inhibit the inflammatory cascade and reduce endothelial-cell injury. One month after intravenous injection of PPS-PEG-RA@TA micelles, the plaque area in murine aortic vessels was reduced significantly, and serious toxic side-effects were not observed in vivo, along with excellent biocompatibility. In summary, PPSPEG-RA@TA micelles could achieve synergistic treatment of atherosclerosis. (c) 2022 American Pharmacists Association. Published by Elsevier Inc. All rights reserved.

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