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Okeyo PO, Rajendran ST, Zór K, Boisen A. Sensing technologies and experimental platforms for the characterization of advanced oral drug delivery systems. Adv Drug Deliv Rev 2021; 176:113850. [PMID: 34182015 DOI: 10.1016/j.addr.2021.113850] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/17/2021] [Accepted: 06/22/2021] [Indexed: 12/18/2022]
Abstract
Complex and miniaturized oral drug delivery systems are being developed rapidly for targeted, controlled drug release and improved bioavailability. Standard analytical techniques are widely used to characterize i) drug carrier and active pharmaceutical ingredients before loading into a delivery device (to ensure the solid form), and ii) the entire drug delivery system during the development process. However, in light of the complexity and the size of some of these systems, standard techniques as well as novel sensing technologies and experimental platforms need to be used in tandem. These technologies and platforms are discussed in this review, with a special focus on passive delivery systems in size range from a few 100 µm to a few mm. Challenges associated with characterizing these systems and evaluating their effect on oral drug delivery in the preclinical phase are also discussed.
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2
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Lykins WR, Hansen ME, Sun X, Advincula R, Finbloom JA, Jain AK, Zala Y, Ma A, Desai TA. Impact of Microdevice Geometry on Transit and Retention in the Murine Gastrointestinal Tract. ACS Biomater Sci Eng 2021. [PMID: 33914503 PMCID: PMC10389692 DOI: 10.1021/acsbiomaterials.0c01606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Oral protein delivery technologies often depend on encapsulating or enclosing the protein cargo to protect it against pH-driven degradation in the stomach or enzymatic digestion in the small intestine. An emergent methodology is to encapsulate therapeutics in microscale, asymmetric, planar microparticles, referred to as microdevices. Previous work has shown that, compared to spherical particles, planar microdevices have longer residence times in the GI tract, but it remains unclear how specific design choices (e.g., material selection, particle diameter) impact microdevice behavior in vivo. Recent advances in microdevice fabrication through picoliter printing have expanded the range of device sizes that can be fabricated in a rapid manner. However, relatively little work has explored how device size governs their behavior in the intestinal environment. In this study, we probe the impact of geometry of planar microdevices on their transit and accumulation in the murine GI tract. Additionally, we present a strategy to label, image, and quantify these distributions in intact tissue in a continuous manner, enabling a more detailed understanding of device distribution and transit kinetics than previously possible. We show that smaller particles (194.6 ± 7 μm.diameter) tend to empty from the stomach faster than midsize (293.2 ± 7 μm.diameter) and larger devices (440.9 ± 9 μm.diameter) and that larger devices distribute more broadly in the GI tract and exit slower than other geometries. In general, we observed an inverse correlation between device diameter and GI transit rate. These results inform the future design of drug delivery systems, using particle geometry as an engineering design parameter to control device accumulation and distribution in the GI tract. Additionally, our image analysis process provides greater insight into the tissue level distribution and transit of particle populations. Using this technique, we demonstrate that microdevices act and translocate independently, as opposed to transiting in one homogeneous mass, meaning that target sites will likely be exposed to devices multiple times over the course of hours post administration. This imaging technique and associated findings enable data-informed design of future particle delivery systems, allowing orthogonal control of transit and distribution kinetics in vivo independent of material and cargo selection.
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Affiliation(s)
- William R Lykins
- University of California Berkeley-University of California San Franciso Graduate Program in Bioengineering, San Francisco, California 94118, United States.,Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, California 94143, United States
| | - M Eva Hansen
- University of California Berkeley-University of California San Franciso Graduate Program in Bioengineering, San Francisco, California 94118, United States.,Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, California 94143, United States
| | - Xiaofei Sun
- Department of Medicine, University of California San Francisco, San Francisco, California 94143, United States
| | - Rommel Advincula
- Department of Medicine, University of California San Francisco, San Francisco, California 94143, United States
| | - Joel A Finbloom
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, California 94143, United States
| | | | - Yashoraj Zala
- Sun Pharma Advanced Research Company, Vadodara 390010, India
| | - Averil Ma
- Department of Medicine, University of California San Francisco, San Francisco, California 94143, United States
| | - Tejal A Desai
- University of California Berkeley-University of California San Franciso Graduate Program in Bioengineering, San Francisco, California 94118, United States.,Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, California 94143, United States
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3
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In vitro and in vivo comparison of microcontainers and microspheres for oral drug delivery. Int J Pharm 2021; 600:120516. [PMID: 33775722 DOI: 10.1016/j.ijpharm.2021.120516] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 11/22/2022]
Abstract
Microcontainers, which are microfabricated cylindrical devices with a reservoir function, have shown promise as an oral drug delivery system for small molecular drug compounds. However, they have never been evaluated against a relevant control formulation. In the current study, we prepared microcrystalline cellulose (MCC) microspheres as a control for in vitro and in vivo testing of SU-8 microcontainers as an oral drug delivery system. Both dosage forms were loaded with paracetamol and coated with chitosan or polyethylene glycol (PEG) (12 kDa). These coatings were followed by an additional enteric coating of Eudragit® S100. In addition, a control dosage form was coated with Eudragit® alone. The dosage forms were evaluated in vitro, in a physiologically relevant two-step model simulating rat gastrointestinal fluids, and in vivo by oral administration to rats. In vitro, the microcontainers coated with PEG/Eudragit® resulted in a prolonged release of paracetamol compared to the respective microspheres, which was consistent with in vivo observations of a later time (Tmax) for maximum plasma concentration (Cmax) for the microcontainers. For microspheres and microcontainers coated with chitosan/Eudragit®, the time for complete in vitro release of paracetamol was very similar, due to an earlier release from the microcontainers. This trend was supported by very similar Tmax values in vivo. The in vitro in vivo relation was confirmed by a linear regression with R2 = 0.9, when Tmax for each dosage form was plotted as a function of time for 90% paracetamol release in vitro. From the in vivo study, the average plasma concentration of paracetamol 120 min after dosing was significantly higher for microcontainers than for microspheres (0.3 ± 0.1 µg/mL and 0.1 ± <0.1 µg/mL, respectively) - regardless of the coating applied.
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4
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Kaur G, Arora M, Ravi Kumar MNV. Oral Drug Delivery Technologies-A Decade of Developments. J Pharmacol Exp Ther 2019; 370:529-543. [PMID: 31010845 PMCID: PMC6806634 DOI: 10.1124/jpet.118.255828] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 04/17/2019] [Indexed: 12/17/2022] Open
Abstract
Advanced drug delivery technologies, in general, enable drug reformulation and administration routes, together contributing to life-cycle management and allowing the innovator to maintain the product monopoly. Over the years, there has been a steady shift from mere life-cycle management to drug repurposing-applying delivery technologies to tackle solubility and permeability issues in early stages or safety and efficacy issues in the late stages of drug discovery processes. While the drug and the disease in question primarily drive the choice of route of administration, the oral route, for its compliance and safety attributes, is the most preferred route, particularly when it comes to chronic conditions, including pain, which is not considered a disease but a symptom of a primary cause. Therefore, the attempt of this review is to take a stock of the advances in oral delivery technologies that are applicable for injectable to oral transformation, improve risk-benefit profiles of existing orals, and apply them in the early discovery program to minimize the drug attrition rates.
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Affiliation(s)
- G Kaur
- Department of Pharmaceutical Sciences, College of Pharmacy, Texas A&M University, College Station, Texas
| | - M Arora
- Department of Pharmaceutical Sciences, College of Pharmacy, Texas A&M University, College Station, Texas
| | - M N V Ravi Kumar
- Department of Pharmaceutical Sciences, College of Pharmacy, Texas A&M University, College Station, Texas
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5
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Bottom-Up Fabrication of Multilayer Enteric Devices for the Oral Delivery of Peptides. Pharm Res 2019; 36:89. [DOI: 10.1007/s11095-019-2618-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 03/28/2019] [Indexed: 12/24/2022]
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6
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Sanjay ST, Zhou W, Dou M, Tavakoli H, Ma L, Xu F, Li X. Recent advances of controlled drug delivery using microfluidic platforms. Adv Drug Deliv Rev 2018; 128:3-28. [PMID: 28919029 PMCID: PMC5854505 DOI: 10.1016/j.addr.2017.09.013] [Citation(s) in RCA: 165] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 08/11/2017] [Accepted: 09/13/2017] [Indexed: 12/13/2022]
Abstract
Conventional systematically-administered drugs distribute evenly throughout the body, get degraded and excreted rapidly while crossing many biological barriers, leaving minimum amounts of the drugs at pathological sites. Controlled drug delivery aims to deliver drugs to the target sites at desired rates and time, thus enhancing the drug efficacy, pharmacokinetics, and bioavailability while maintaining minimal side effects. Due to a number of unique advantages of the recent microfluidic lab-on-a-chip technology, microfluidic lab-on-a-chip has provided unprecedented opportunities for controlled drug delivery. Drugs can be efficiently delivered to the target sites at desired rates in a well-controlled manner by microfluidic platforms via integration, implantation, localization, automation, and precise control of various microdevice parameters. These features accordingly make reproducible, on-demand, and tunable drug delivery become feasible. On-demand self-tuning dynamic drug delivery systems have shown great potential for personalized drug delivery. This review presents an overview of recent advances in controlled drug delivery using microfluidic platforms. The review first briefly introduces microfabrication techniques of microfluidic platforms, followed by detailed descriptions of numerous microfluidic drug delivery systems that have significantly advanced the field of controlled drug delivery. Those microfluidic systems can be separated into four major categories, namely drug carrier-free micro-reservoir-based drug delivery systems, highly integrated carrier-free microfluidic lab-on-a-chip systems, drug carrier-integrated microfluidic systems, and microneedles. Microneedles can be further categorized into five different types, i.e. solid, porous, hollow, coated, and biodegradable microneedles, for controlled transdermal drug delivery. At the end, we discuss current limitations and future prospects of microfluidic platforms for controlled drug delivery.
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Affiliation(s)
- Sharma T. Sanjay
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Wan Zhou
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Maowei Dou
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory
| | - Hamed Tavakoli
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Lei Ma
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
| | - Feng Xu
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - XiuJun Li
- Department of Chemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Border Biomedical Research Center, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Biomedical Engineering, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
- Environmental Science and Engineering, University of Texas at El Paso, 500 West University Ave, El Paso, Texas, 79968, USA, Richland, Washington, 99354, USA
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7
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Fox CB, Nemeth CL, Chevalier RW, Cantlon J, Bogdanoff DB, Hsiao JC, Desai TA. Picoliter-volume inkjet printing into planar microdevice reservoirs for low-waste, high-capacity drug loading. Bioeng Transl Med 2017; 2:9-16. [PMID: 28503662 PMCID: PMC5426811 DOI: 10.1002/btm2.10053] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Oral delivery of therapeutics is the preferred route for systemic drug administration due to ease of access and improved patient compliance. However, many therapeutics suffer from low oral bioavailability due to low pH and enzymatic conditions, poor cellular permeability, and low residence time. Microfabrication techniques have been used to create planar, asymmetric microdevices for oral drug delivery to address these limitations. The geometry of these microdevices facilitates prolonged drug exposure with unidirectional release of drug toward gastrointestinal epithelium. While these devices have significantly enhanced drug permeability in vitro and in vivo, loading drug into the micron-scale reservoirs of the devices in a low-waste, high-capacity manner remains challenging. Here, we use picoliter-volume inkjet printing to load topotecan and insulin into planar microdevices efficiently. Following a simple surface functionalization step, drug solution can be spotted into the microdevice reservoir. We show that relatively high capacities of both topotecan and insulin can be loaded into microdevices in a rapid, automated process with little to no drug waste.
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Affiliation(s)
- Cade B Fox
- Dept. of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158
| | - Cameron L Nemeth
- UC Berkeley and UCSF Graduate Program in Bioengineering, UCSF Mission Bay Campus, San Francisco, CA 94158
| | - Rachel W Chevalier
- Dept. of Pediatrics, Division of Pediatric Gastroenterology, School of Medicine, University of California, San Francisco, CA 94158
| | | | - Derek B Bogdanoff
- Center for Advanced Technology, University of California, San Francisco, CA, 94158
| | - Jeff C Hsiao
- Dept. of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158
| | - Tejal A Desai
- Dept. of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158.,UC Berkeley and UCSF Graduate Program in Bioengineering, UCSF Mission Bay Campus, San Francisco, CA 94158
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Marizza P, Abrami M, Keller SS, Posocco P, Laurini E, Goswami K, Skov AL, Boisen A, Larobina D, Grassi G, Grassi M. Synthesis and characterization of UV photocrosslinkable hydrogels with poly(N-vinyl-2-pyrrolidone): Determination of the network mesh size distribution. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2015.1129964] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Supercritical impregnation of polymer matrices spatially confined in microcontainers for oral drug delivery: Effect of temperature, pressure and time. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2015.08.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Glucose-Based Mesoporous Carbon Nanospheres as Functional Carriers for Oral Delivery of Amphiphobic Raloxifene: Insights into the Bioavailability Enhancement and Lymphatic Transport. Pharm Res 2015; 33:792-803. [DOI: 10.1007/s11095-015-1827-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 11/04/2015] [Indexed: 10/24/2022]
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11
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Lee K, Lingampalli N, Pisano AP, Murthy N, So H. Physical Delivery of Macromolecules using High-Aspect Ratio Nanostructured Materials. ACS APPLIED MATERIALS & INTERFACES 2015; 7:23387-97. [PMID: 26479334 PMCID: PMC6070377 DOI: 10.1021/acsami.5b05520] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
There is great need for the development of an efficient delivery method of macromolecules, including nucleic acids, proteins, and peptides, to cell cytoplasm without eliciting toxicity or changing cell behavior. High-aspect ratio nanomaterials have addressed many challenges present in conventional methods, such as cell membrane passage and endosomal degradation, and have shown the feasibility of efficient high-throughput macromolecule delivery with minimal perturbation of cells. This review describes the recent advances of in vitro and in vivo physical macromolecule delivery with high-aspect ratio nanostructured materials and summarizes the synthesis methods, material properties, relevant applications, and various potential directions.
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Affiliation(s)
- Kunwoo Lee
- Department of Bioengineering, Berkeley Sensor & Actuator Center, University of California, Berkeley, California 94720, United States
| | - Nithya Lingampalli
- Department of Bioengineering, Berkeley Sensor & Actuator Center, University of California, Berkeley, California 94720, United States
| | - Albert P. Pisano
- Department of Mechanical Engineering, Berkeley Sensor & Actuator Center, University of California, Berkeley, California 94720, United States
- Jacobs School of Engineering, University of California, San Diego, California 92093, United States
| | - Niren Murthy
- Department of Bioengineering, Berkeley Sensor & Actuator Center, University of California, Berkeley, California 94720, United States
| | - Hongyun So
- Department of Mechanical Engineering, Berkeley Sensor & Actuator Center, University of California, Berkeley, California 94720, United States
- Corresponding Author:
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12
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Fox CB, Kim J, Le LV, Nemeth CL, Chirra HD, Desai TA. Micro/nanofabricated platforms for oral drug delivery. J Control Release 2015; 219:431-444. [PMID: 26244713 DOI: 10.1016/j.jconrel.2015.07.033] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 07/29/2015] [Accepted: 07/30/2015] [Indexed: 12/18/2022]
Abstract
The oral route of drug administration is most preferred due to its ease of use, low cost, and high patient compliance. However, the oral uptake of many small molecule drugs and biotherapeutics is limited by various physiological barriers, and, as a result, drugs suffer from issues with low solubility, low permeability, and degradation following oral administration. The flexibility of micro- and nanofabrication techniques has been used to create drug delivery platforms designed to address these barriers to oral drug uptake. Specifically, micro/nanofabricated devices have been designed with planar, asymmetric geometries to promote device adhesion and unidirectional drug release toward epithelial tissue, thereby prolonging drug exposure and increasing drug permeation. Furthermore, surface functionalization, nanotopography, responsive drug release, motion-based responses, and permeation enhancers have been incorporated into such platforms to further enhance drug uptake. This review will outline the application of micro/nanotechnology to specifically address the physiological barriers to oral drug delivery and highlight technologies that may be incorporated into these oral drug delivery systems to further enhance drug uptake.
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Affiliation(s)
- Cade B Fox
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158, USA
| | - Jean Kim
- UC Berkeley & UCSF Graduate Program in Bioengineering, UCSF Mission Bay Campus, San Francisco, CA 94158, USA
| | - Long V Le
- UC Berkeley & UCSF Graduate Program in Bioengineering, UCSF Mission Bay Campus, San Francisco, CA 94158, USA
| | - Cameron L Nemeth
- UC Berkeley & UCSF Graduate Program in Bioengineering, UCSF Mission Bay Campus, San Francisco, CA 94158, USA
| | - Hariharasudhan D Chirra
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158, USA
| | - Tejal A Desai
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94158, USA; UC Berkeley & UCSF Graduate Program in Bioengineering, UCSF Mission Bay Campus, San Francisco, CA 94158, USA.
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13
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Fox CB, Kim J, Schlesinger EB, Chirra HD, Desai TA. Fabrication of micropatterned polymeric nanowire arrays for high-resolution reagent localization and topographical cellular control. NANO LETTERS 2015; 15:1540-6. [PMID: 25639724 PMCID: PMC4664059 DOI: 10.1021/nl503872p] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Herein, we present a novel approach for the fabrication of micropatterned polymeric nanowire arrays that addresses the current need for scalable and customizable polymer nanofabrication. We describe two variations of this approach for the patterning of nanowire arrays on either flat polymeric films or discrete polymeric microstructures and go on to investigate biological applications for the resulting polymeric features. We demonstrate that the micropatterned arrays of densely packed nanowires facilitate rapid, low-waste drug and reagent localization with micron-scale resolution as a result of their high wettability. We also show that micropatterned nanowire arrays provide hierarchical cellular control by simultaneously directing cell shape on the micron scale and influencing focal adhesion formation on the nanoscale. This nanofabrication approach has potential applications in scaffold-based cellular control, biological assay miniaturization, and biomedical microdevice technology.
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Affiliation(s)
- Cade B. Fox
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California 94158, United States
| | - Jean Kim
- UC Berkeley and UCSF Graduate Program in Bioengineering, UCSF Mission Bay Campus, San Francisco, California 94158, United States
| | - Erica B. Schlesinger
- UC Berkeley and UCSF Graduate Program in Bioengineering, UCSF Mission Bay Campus, San Francisco, California 94158, United States
| | - Hariharasudhan D. Chirra
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California 94158, United States
| | - Tejal A Desai
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California 94158, United States
- UC Berkeley and UCSF Graduate Program in Bioengineering, UCSF Mission Bay Campus, San Francisco, California 94158, United States
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