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Updated: Sep 20, 2026
Magnetic and Thermal-sensitive Poly(N-isopropylacrylamide)-based Microgels for Magnetically Triggered Controlled Release
Published on: July 4, 2017
[Preparation and the characteristic test of magnetic pingyangmycine-bearing microspheres]
Sheng Zhang1, Han-jiang Wu, Tian-you Ling
1Department of Stomatology, Second Xiangya Hospital, Central South University, Changsha 410011, China.
Objectives:
To prepare the magnetic pingyangmycine-bearing microspheres (MPMs), test its characteristics, and evaluate the target ability of MPMs.
Methods:
MPMs were prepared by a cold-condensation method at first. Then the scan electron microscope, high performance liquid chromatography (HPLC) and atomic absorption spectrometry were used to measure the diameter of MPMs and the contents of PYM and Fe3O4 in MPMs. Drug-releasing instrument was used to test the quantity of PYM released from MPMs. The distribution of intravenously injected MPMs in SD rat liver was investigated under an externally magnetic field.
Results:
MPMs are spherical with the mean diameter of 32.23 microns. The content of pingyangmycine in MPMs was 3.8% and Fe3O4 was 11.7% (w/w). The quantity of PYM released from MPMs in 3 hours was 63.1%. The content of Fe3O4 in the targeting sites of rats was obviously higher than that in the non-targeting sites (P < 0.01).
Conclusion:
MPMs have good properties of drug-targeting and drug sustain releasing. MPMs may be ideal for the use of the treatment of cavernous hemangioma.
