Abstract
A monolayer and trilayer membrane configuration of ethylcellulose were doped with a new synthesized diazeniumdiolate GAGS/NO (glutaraldehyde modification of glucosamine/NO adduct) and DETA/NO as the NO donor species, which can be used for altering the time course of nitric oxide donor release and targeting it to tissues with which the polymers are in physical contact. The NO donor release profiles show that the average release rate of DETA/NO can be controlled from 0.2 to 9 × 10−10mol cm−2 min−1 for at least 7 day and up to 30 day under physiological condition. The average release rate of GAGS/NO is varied from 0.1 to 0.5 × 10−10mol cm−2 min−1 for up to 94 day. The trilayer configuration effectively eliminates the burst release in the initial stage, and notably increases the NO donor release time. The trilayer films of DETA/NO can release 5% of the total NO donors over 69 h. In comparison, the trilayer films of GAGS/NO only release 2.5% of the total NO donors over 69 h. The results suggest that this nitric oxide donor releasing polymer may hold considerable promise for reducing the risk of restenosis following angioplasty and other interventional procedures for vascular repair.
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Acknowledgment
This work is financially supported by the National Natural Science Foundation of China. (Grant No: 20376045 and 20676079), and partly supported by the Nanometer Technology Program of Science and Technology Committee of Shanghai (0452nm037).
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Wan, A., Gao, Q. & Li, H. Preparation and characterization of diazeniumdiolate releasing ethylcellulose films. J Mater Sci: Mater Med 20, 321–327 (2009). https://doi.org/10.1007/s10856-008-3511-5
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DOI: https://doi.org/10.1007/s10856-008-3511-5