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Emi TT, Barnes T, Orton E, Reisch A, Tolouei AE, Madani SZM, Kennedy SM. Pulsatile Chemotherapeutic Delivery Profiles Using Magnetically Responsive Hydrogels. ACS Biomater Sci Eng 2018; 4:2412-2423. [PMID: 30019005 PMCID: PMC6039960 DOI: 10.1021/acsbiomaterials.8b00348] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 05/15/2018] [Indexed: 12/17/2022]
Abstract
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Pulsatile
chemotherapeutic delivery profiles may provide a number
advantages by maximizing the anticancer toxicity of chemotherapeutics,
reducing off-target side effects, and combating adaptive resistance.
While these temporally dynamic deliveries have shown some promise,
they have yet to be clinically deployed from implantable hydrogels,
whose localized deliveries could further enhance therapeutic outcomes.
Here, several pulsatile chemotherapeutic delivery profiles were tested
on melanoma cell survival in vitro and compared to constant (flatline)
delivery profiles of the same integrated dose. Results indicated that
pulsatile delivery profiles were more efficient at killing melanoma
cells than flatline deliveries. Furthermore, results suggested that
parameters like the duration of drug “on” periods (pulse
width), delivery rates during those periods (pulse heights), and the
number/frequency of pulses could be used to optimize delivery profiles.
Optimization of pulsatile profiles at tumor sites in vivo would require
hydrogel materials capable of producing a wide variety of pulsatile
profiles (e.g., of different pulse heights, pulse widths, and pulse
numbers). This work goes on to demonstrate that magnetically responsive,
biphasic ferrogels are capable of producing pulsatile mitoxantrone
delivery profiles similar to those tested in vitro. Pulse parameters
such as the timing and rate of delivery during “on”
periods could be remotely regulated through the use of simple, hand-held
magnets. The timing of pulses was controlled simply by deciding when
and for how long to magnetically stimulate. The rate of release during
pulse “on” periods was a function of the magnetic stimulation
frequency. These findings add to the growing evidence that pulsatile
chemotherapeutic delivery profiles may be therapeutically beneficial
and suggest that magnetically responsive hydrogels could provide useful
tools for optimizing and clinically deploying pulsatile chemotherapeutic
delivery profiles.
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Affiliation(s)
- Tania T Emi
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Tanner Barnes
- Department of Electrical, Computer, and Biomedical Engineering, University of Rhode Island, Kingston, Rhode Island 028881, United States
| | - Emma Orton
- Department of Electrical, Computer, and Biomedical Engineering, University of Rhode Island, Kingston, Rhode Island 028881, United States
| | - Anne Reisch
- Department of Electrical, Computer, and Biomedical Engineering, University of Rhode Island, Kingston, Rhode Island 028881, United States
| | - Anita E Tolouei
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - S Zahra M Madani
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States
| | - Stephen M Kennedy
- Department of Chemical Engineering, University of Rhode Island, Kingston, Rhode Island 02881, United States.,Department of Electrical, Computer, and Biomedical Engineering, University of Rhode Island, Kingston, Rhode Island 028881, United States
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Long-Acting Injections and Implants. Drug Deliv 2016. [DOI: 10.1201/9781315382579-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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