Abstract
Implants are drug delivery platforms that consist of a drug-polymer matrix with the ability of providing a localized and efficient controlled release of the drug with minimal side effects and achievement of the desired therapeutic outcomes with low drug loadings. Direct powder extrusion (DPE) 3D printing technology involves the extrusion of material through a nozzle of the printer in the form of pellets or powder. The present study aimed at investigating the use of the CELLINK BIO X™ bioprinter using DPE 3D printing technique to fabricate and evaluate the impact of different shapes (cuboid, cylinder, and tube) of raloxifene hydrochloride (RFH)-loaded subdermal implants on the release of RFH from the implants. This study further evaluated the impact of different processing techniques, viz., hot-melt extrusion (HME) technology vs. DPE 3D printing technique, on the release of RFH from the implants fabricated by each processing technique. All the fabricated implants were characterized by XRD, DSC, SEM, and FTIR, and evaluated for their water uptake, mass loss, and in vitro RFH release. The current study successfully demonstrated a great opportunity of controlling and/or tuning the release of RFH from the subdermal implants by altering the implant shape, and hence surface area, and could be a great contribution and/or addition to the personalization of medicines and improvement of patient compliance.
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Acknowledgements
This project was also partially supported by Grant Number P30GM122733-01A1, funded by the National Institute of General Medical Sciences (NIGMS) a component of the National Institutes of Health (NIH) as one of its Centers of Biomedical Research Excellence (COBRE).
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Derick Muhindo: Study conception and design, conduct laboratory experiments, analyze experimental data collected, interpretation of results, manuscript writing/preparation.
Eman A. Ashour: Review and approve the study conception and design, review set up of laboratory experiments, review data and results generated from laboratory experiments, review the drafted manuscript and provide feedback to have the final manuscript ready for submission to the journal.
Mashan Almutairi: Assist in designing and conducting laboratory experiments.
Michael A. Repka: Review and approve the study conception and design, review set up of laboratory experiments, review data and results generated from laboratory experiments, review and approve the final manuscript for submission to the journal.
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Muhindo, D., Ashour, E.A., Almutairi, M. et al. Development of Subdermal Implants Using Direct Powder Extrusion 3D Printing and Hot-Melt Extrusion Technologies. AAPS PharmSciTech 24, 215 (2023). https://doi.org/10.1208/s12249-023-02669-7
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DOI: https://doi.org/10.1208/s12249-023-02669-7