Magnetic field distribution modulation of intrathecal delivered ketorolac iron-oxide nanoparticle conjugates produce excellent analgesia for chronic inflammatory pain

Journal of Nanobiotechnology
Ping-Ching WuYen-Chin Liu

Abstract

Nanoparticles have become one of the most promising among the potential materials used for biomedical applications. However, few researchers have focused on their effects on analgesia. Despite the fact that various nanoparticles have been evaluated for drug delivery and MRI imaging contrast enhancement in clinical settings, no reports have investigated the in vivo synergy of ketorolac iron-oxide nanoparticle conjugates to improve the analgesic effect. Ketorolac conjugated magnetic iron oxide nanoparticles (Keto-SPIO) were synthesized via two-stage additions of protective agents and chemical co-precipitation. ICR mice were used to develop inflammatory pain models induced by Complete Freund's adjuvant (CFA) injection in the hind paw. Different magnet field strengths and polarities were applied to the spinal cord after injecting Keto-SPIO into the theca space. Analgesia behavior was evaluated with the up-down method via von Frey microfilament measurement. Spinal cord tissues were harvested at the end analgesia time point upon induction of the inflammatory pain. The presence of the two cyclooxygenases (COX) in the spinal cord was examined via Western blotting to quantify the changes after intra-thecal Keto-SPIO administration. Intr...Continue Reading

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May 26, 2017·Nanomedicine : Nanotechnology, Biology, and Medicine·Ping-Ching WuYen-Chin Liu

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Citations

Aug 3, 2019·Journal of Functional Biomaterials·Carlos M WellsJ Amber Jennings
Jan 8, 2021·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Ana F AlmeidaManuela E Gomes
Mar 7, 2020·Advanced Drug Delivery Reviews·M J FowlerR W Sirianni

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BETA
fluorescence imaging

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Image J
IVIS

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