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Karve T, Dandekar A, Agrahari V, Melissa Peet M, Banga AK, Doncel GF. Long-acting transdermal drug delivery formulations: Current developments and innovative pharmaceutical approaches. Adv Drug Deliv Rev 2024; 210:115326. [PMID: 38692457 DOI: 10.1016/j.addr.2024.115326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 04/05/2024] [Accepted: 04/25/2024] [Indexed: 05/03/2024]
Abstract
Transdermal administration remains an active research and development area as an alternative route for long-acting drug delivery. It avoids major drawbacks of conventional oral (gastrointestinal side effects, low drug bioavailability, and need for multiple dosing) or parenteral routes (invasiveness, pain, and psychological stress and bio-hazardous waste generated from needles), thereby increasing patient appeal and compliance. This review focuses on the current state of long-acting transdermal drug delivery, including adhesive patches, microneedles, and molecularly imprinted polymeric systems. Each subsection describes an approach including key considerations in formulation development, design, and process parameters with schematics. An overview of commercially available conventional (adhesive) patches for long-acting drug delivery (longer than 24 h), the reservoir- and matrix-type systems under preclinical evaluation, as well as the advanced transdermal formulations, such as the core-shell, nanoformulations-incorporated and stimuli-responsive microneedles, and 3D-printed and molecularly imprinted polymers that are in development, is also provided. Finally, we elaborated on translational aspects, challenges in patch formulation development, and future directions for the clinical advancement of new long-acting transdermal products.
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Affiliation(s)
- Tanvi Karve
- Center for Drug Delivery Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
| | - Amruta Dandekar
- Center for Drug Delivery Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
| | - Vivek Agrahari
- CONRAD, Eastern Virginia Medical School, Norfolk, VA 23507, USA.
| | - M Melissa Peet
- CONRAD, Eastern Virginia Medical School, Norfolk, VA 23507, USA
| | - Ajay K Banga
- Center for Drug Delivery Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA.
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2
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Zareein A, Mahmoudi M, Jadhav SS, Wilmore J, Wu Y. Biomaterial engineering strategies for B cell immunity modulations. Biomater Sci 2024; 12:1981-2006. [PMID: 38456305 PMCID: PMC11019864 DOI: 10.1039/d3bm01841e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 02/23/2024] [Indexed: 03/09/2024]
Abstract
B cell immunity has a penetrating effect on human health and diseases. Therapeutics aiming to modulate B cell immunity have achieved remarkable success in combating infections, autoimmunity, and malignancies. However, current treatments still face significant limitations in generating effective long-lasting therapeutic B cell responses for many conditions. As the understanding of B cell biology has deepened in recent years, clearer regulation networks for B cell differentiation and antibody production have emerged, presenting opportunities to overcome current difficulties and realize the full therapeutic potential of B cell immunity. Biomaterial platforms have been developed to leverage these emerging concepts to augment therapeutic humoral immunity by facilitating immunogenic reagent trafficking, regulating T cell responses, and modulating the immune microenvironment. Moreover, biomaterial engineering tools have also advanced our understanding of B cell biology, further expediting the development of novel therapeutics. In this review, we will introduce the general concept of B cell immunobiology and highlight key biomaterial engineering strategies in the areas including B cell targeted antigen delivery, sustained B cell antigen delivery, antigen engineering, T cell help optimization, and B cell suppression. We will also discuss our perspective on future biomaterial engineering opportunities to leverage humoral immunity for therapeutics.
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Affiliation(s)
- Ali Zareein
- Department of Biomedical Engineering, Syracuse University, Syracuse, NY, USA.
- The BioInspired Institute for Material and Living Systems, Syracuse University, Syracuse, NY, USA
| | - Mina Mahmoudi
- Department of Biomedical Engineering, Syracuse University, Syracuse, NY, USA.
- The BioInspired Institute for Material and Living Systems, Syracuse University, Syracuse, NY, USA
| | - Shruti Sunil Jadhav
- Department of Biomedical Engineering, Syracuse University, Syracuse, NY, USA.
| | - Joel Wilmore
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Yaoying Wu
- Department of Biomedical Engineering, Syracuse University, Syracuse, NY, USA.
- The BioInspired Institute for Material and Living Systems, Syracuse University, Syracuse, NY, USA
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, USA
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3
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Meng F, Qiao X, Xin C, Ju X, He M. Recent progress of polymeric microneedle-assisted long-acting transdermal drug delivery. JOURNAL OF PHARMACY & PHARMACEUTICAL SCIENCES : A PUBLICATION OF THE CANADIAN SOCIETY FOR PHARMACEUTICAL SCIENCES, SOCIETE CANADIENNE DES SCIENCES PHARMACEUTIQUES 2024; 27:12434. [PMID: 38571937 PMCID: PMC10987780 DOI: 10.3389/jpps.2024.12434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 03/06/2024] [Indexed: 04/05/2024]
Abstract
Microneedle (MN)-assisted drug delivery technology has gained increasing attention over the past two decades. Its advantages of self-management and being minimally invasive could allow this technology to be an alternative to hypodermic needles. MNs can penetrate the stratum corneum and deliver active ingredients to the body through the dermal tissue in a controlled and sustained release. Long-acting polymeric MNs can reduce administration frequency to improve patient compliance and therapeutic outcomes, especially in the management of chronic diseases. In addition, long-acting MNs could avoid gastrointestinal reactions and reduce side effects, which has potential value for clinical application. In this paper, advances in design strategies and applications of long-acting polymeric MNs are reviewed. We also discuss the challenges in scale manufacture and regulations of polymeric MN systems. These two aspects will accelerate the effective clinical translation of MN products.
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Affiliation(s)
- Fanda Meng
- College of Clinical and Basic Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Xinyu Qiao
- College of Clinical and Basic Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Chenglong Xin
- Shandong Center for Disease Control and Prevention, Jinan, China
| | - Xiaoli Ju
- Yantai Key Laboratory of Nanomedicine and Advanced Preparations, Yantai Institute of Materia Medica, Yantai, Shandong, China
| | - Meilin He
- Yantai Key Laboratory of Nanomedicine and Advanced Preparations, Yantai Institute of Materia Medica, Yantai, Shandong, China
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4
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Ray S, Puente A, Steinmetz NF, Pokorski JK. Recent advancements in single dose slow-release devices for prophylactic vaccines. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2023; 15:e1832. [PMID: 35850120 PMCID: PMC9840709 DOI: 10.1002/wnan.1832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 05/31/2022] [Indexed: 01/31/2023]
Abstract
Single dose slow-release vaccines herald a new era in vaccine administration. An ideal device for slow-release vaccine delivery would be minimally invasive and self-administered, making these approaches an attractive alternative for mass vaccination programs, particularly during the time of a pandemic. In this review article, we discuss the latest advances in this field, specifically for prophylactic vaccines able to prevent infectious diseases. Recent studies have found that slow-release vaccines elicit better immune responses and often do not require cold chain transportation and storage, thus drastically reducing the cost, streamlining distribution, and improving efficacy. This promise has attracted significant attention, especially when poor patient compliance of the standard multidose vaccine regimes is considered. Single dose slow-release vaccines are the next generation of vaccine tools that could overcome most of the shortcomings of present vaccination programs and be the next platform technology to combat future pandemics. This article is categorized under: Therapeutic Approaches and Drug Discovery > Emerging Technologies Implantable Materials and Surgical Technologies > Nanomaterials and Implants Biology-Inspired Nanomaterials > Protein and Virus-Based Structures.
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Affiliation(s)
- Sayoni Ray
- Department of NanoEngineering, University of California-San Diego, La Jolla, California, USA,Center for Nano-ImmunoEngineering, University of California-San Diego, La Jolla, California, USA
| | - Armando Puente
- Department of NanoEngineering, University of California-San Diego, La Jolla, California, USA,Center for Nano-ImmunoEngineering, University of California-San Diego, La Jolla, California, USA
| | - Nicole F. Steinmetz
- Department of NanoEngineering, University of California-San Diego, La Jolla, California, USA,Center for Nano-ImmunoEngineering, University of California-San Diego, La Jolla, California, USA,Institute for Materials Discovery and Design, University of California-San Diego, La Jolla, California, USA,Department of Bioengineering, University of California-San Diego, La Jolla, California, USA,Department of Radiology, University of California-San Diego, La Jolla, California, USA,Moores Cancer Center, University of California-San Diego, La Jolla, California, USA
| | - Jonathan K. Pokorski
- Department of NanoEngineering, University of California-San Diego, La Jolla, California, USA,Center for Nano-ImmunoEngineering, University of California-San Diego, La Jolla, California, USA,Institute for Materials Discovery and Design, University of California-San Diego, La Jolla, California, USA
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5
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Hong JKY, Schutzman R, Olsen K, Chandrashekar A, Schwendeman SP. Mapping in vivo microclimate pH distribution in exenatide-encapsulated PLGA microspheres. J Control Release 2022; 352:438-449. [PMID: 36030989 DOI: 10.1016/j.jconrel.2022.08.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 07/30/2022] [Accepted: 08/22/2022] [Indexed: 11/05/2022]
Abstract
The pH inside the aqueous pores of poly(lactic-co-glycolic acid) (PLGA) microspheres, often termed microclimate pH (μpH), has been widely evaluated in vitro and shown to commonly be deleterious to pH-labile encapsulated drug molecules. However, whether the in vitro μpH is representative of the actual in vivo values has long been remained a largely unresolved issue. Herein we quantitatively mapped, for the first time, the in vivo μpH distribution kinetics inside degrading PLGA microspheres by combining two previously validated techniques, a cage implant system and confocal laser scanning microscopy. PLGA (50/50, Mw = 24-38 kDa, acid-end capped and ester-capped) microsphere formulations with and without encapsulating exenatide, a pH-labile peptide that is known to be unstable when pH > 4.5, were administered to rats subcutaneously via cage implants for up to 6 weeks. The results were compared with two different in vitro conditions. Strikingly, the in vivo μpH developed similarly to the low microsphere concentration in vitro condition with 1-μm nylon bags but very different from conventional high microsphere concentration sample-and-separate conditions. Improved maintenance of stable external pH in the release media for the former condition may have been one important factor. Stability of exenatide remaining inside microspheres was evaluated by mass spectrometry and found that it was steadily degraded primarily via pH-dependent acylation with a trend that slightly paralleled the changes in μpH. This methodology may be useful to elucidate pH-triggered instability of PLGA encapsulated drugs in vivo and for improving in vivo-predictive in vitro conditions for assessing general PLGA microsphere performance.
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Affiliation(s)
- Justin K Y Hong
- Department of Pharmaceutical Sciences, The Biointerfaces Institute, University of Michigan, 2800 Plymouth Rd, Ann Arbor, MI 48109, USA
| | - Richard Schutzman
- Department of Pharmaceutical Sciences, The Biointerfaces Institute, University of Michigan, 2800 Plymouth Rd, Ann Arbor, MI 48109, USA
| | - Karl Olsen
- Department of Pharmaceutical Sciences, The Biointerfaces Institute, University of Michigan, 2800 Plymouth Rd, Ann Arbor, MI 48109, USA
| | - Aishwarya Chandrashekar
- Department of Pharmaceutical Sciences, The Biointerfaces Institute, University of Michigan, 2800 Plymouth Rd, Ann Arbor, MI 48109, USA
| | - Steven P Schwendeman
- Department of Pharmaceutical Sciences, The Biointerfaces Institute, University of Michigan, 2800 Plymouth Rd, Ann Arbor, MI 48109, USA; Department of Biomedical Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, MI 48109, USA.
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6
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Drug delivery with dissolving microneedles: Skin puncture, its influencing factors and improvement strategies. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Jang D, Tang J, Schwendeman SP, Prausnitz MR. Effect of Surface Interactions on Microsphere Loading in Dissolving Microneedle Patches. ACS APPLIED MATERIALS & INTERFACES 2022; 14:29577-29587. [PMID: 35732055 PMCID: PMC9264316 DOI: 10.1021/acsami.2c05795] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Microneedle (MN) patches enable simple self-administration of drugs via the skin. In this study, we sought to deliver drug-loaded microspheres (MSs) using MN patches and found that the poly(lactic-co-glycolic acid) (PLGA) MSs failed to localize in the MN tips during fabrication, thereby decreasing their delivered dose and delivery efficiency into skin. We determined that surface interactions between the hydrophobic MSs and the poly(dimethylsiloxane) (PDMS) mold caused MSs to adhere to the mold surface during casting in aqueous formulations, with hydrophobic interactions largely responsible for adhesion. Further studies with polystyrene MSs that similarly carry a negative charge like the PLGA MSs demonstrated both repulsive electrostatic interactions as well as adhesive hydrophobic interactions. Reducing hydrophobic interactions by addition of a surfactant or modifying mold surface properties increased MS loading into MN tips and delivery into porcine skin ex vivo by 3-fold. We conclude that surface interactions affect the loading of hydrophobic MSs into MN patches during aqueous fabrication procedures and that their modulation with the surfactant can increase loading and delivery efficiency.
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Affiliation(s)
- Derek Jang
- Wallace
H. Coulter Department of Biomedical Engineering at Georgia Tech and
Emory University, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Jie Tang
- Department
of Pharmaceutical Sciences and the Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Steven P. Schwendeman
- Department
of Pharmaceutical Sciences and the Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Mark R. Prausnitz
- Wallace
H. Coulter Department of Biomedical Engineering at Georgia Tech and
Emory University, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- School
of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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8
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Vlachopoulos A, Karlioti G, Balla E, Daniilidis V, Kalamas T, Stefanidou M, Bikiaris ND, Christodoulou E, Koumentakou I, Karavas E, Bikiaris DN. Poly(Lactic Acid)-Based Microparticles for Drug Delivery Applications: An Overview of Recent Advances. Pharmaceutics 2022; 14:pharmaceutics14020359. [PMID: 35214091 PMCID: PMC8877458 DOI: 10.3390/pharmaceutics14020359] [Citation(s) in RCA: 61] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 01/27/2022] [Accepted: 01/31/2022] [Indexed: 11/23/2022] Open
Abstract
The sustained release of pharmaceutical substances remains the most convenient way of drug delivery. Hence, a great variety of reports can be traced in the open literature associated with drug delivery systems (DDS). Specifically, the use of microparticle systems has received special attention during the past two decades. Polymeric microparticles (MPs) are acknowledged as very prevalent carriers toward an enhanced bio-distribution and bioavailability of both hydrophilic and lipophilic drug substances. Poly(lactic acid) (PLA), poly(lactic-co-glycolic acid) (PLGA), and their copolymers are among the most frequently used biodegradable polymers for encapsulated drugs. This review describes the current state-of-the-art research in the study of poly(lactic acid)/poly(lactic-co-glycolic acid) microparticles and PLA-copolymers with other aliphatic acids as drug delivery devices for increasing the efficiency of drug delivery, enhancing the release profile, and drug targeting of active pharmaceutical ingredients (API). Potential advances in generics and the constant discovery of therapeutic peptides will hopefully promote the success of microsphere technology.
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Affiliation(s)
- Antonios Vlachopoulos
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (A.V.); (G.K.); (E.B.); (V.D.); (T.K.); (M.S.); (N.D.B.); (E.C.); (I.K.)
| | - Georgia Karlioti
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (A.V.); (G.K.); (E.B.); (V.D.); (T.K.); (M.S.); (N.D.B.); (E.C.); (I.K.)
| | - Evangelia Balla
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (A.V.); (G.K.); (E.B.); (V.D.); (T.K.); (M.S.); (N.D.B.); (E.C.); (I.K.)
| | - Vasileios Daniilidis
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (A.V.); (G.K.); (E.B.); (V.D.); (T.K.); (M.S.); (N.D.B.); (E.C.); (I.K.)
| | - Theocharis Kalamas
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (A.V.); (G.K.); (E.B.); (V.D.); (T.K.); (M.S.); (N.D.B.); (E.C.); (I.K.)
| | - Myrika Stefanidou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (A.V.); (G.K.); (E.B.); (V.D.); (T.K.); (M.S.); (N.D.B.); (E.C.); (I.K.)
| | - Nikolaos D. Bikiaris
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (A.V.); (G.K.); (E.B.); (V.D.); (T.K.); (M.S.); (N.D.B.); (E.C.); (I.K.)
| | - Evi Christodoulou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (A.V.); (G.K.); (E.B.); (V.D.); (T.K.); (M.S.); (N.D.B.); (E.C.); (I.K.)
| | - Ioanna Koumentakou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (A.V.); (G.K.); (E.B.); (V.D.); (T.K.); (M.S.); (N.D.B.); (E.C.); (I.K.)
| | - Evangelos Karavas
- Pharmathen S.A., Pharmaceutical Industry, Dervenakion Str. 6, Pallini Attikis, GR-153 51 Attiki, Greece
- Correspondence: (E.K.); (D.N.B.); Tel.: +30-231-099-7812 (D.N.B.)
| | - Dimitrios N. Bikiaris
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece; (A.V.); (G.K.); (E.B.); (V.D.); (T.K.); (M.S.); (N.D.B.); (E.C.); (I.K.)
- Correspondence: (E.K.); (D.N.B.); Tel.: +30-231-099-7812 (D.N.B.)
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9
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Trends in Drug- and Vaccine-based Dissolvable Microneedle Materials and Methods of Fabrication. Eur J Pharm Biopharm 2022; 173:54-72. [DOI: 10.1016/j.ejpb.2022.02.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 01/24/2022] [Accepted: 02/19/2022] [Indexed: 12/18/2022]
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Bao L, Park J, Bonfante G, Kim B. Recent advances in porous microneedles: materials, fabrication, and transdermal applications. Drug Deliv Transl Res 2022; 12:395-414. [PMID: 34415566 PMCID: PMC8724174 DOI: 10.1007/s13346-021-01045-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/08/2021] [Indexed: 12/20/2022]
Abstract
In the past two decades, microneedles (MNs), as a painless and simple drug delivery system, have received increasing attention for various biomedical applications such as transdermal drug delivery, interstitial fluid (ISF) extraction, and biosensing. Among the various types of MNs, porous MNs have been recently researched owing to their distinctive and unique characteristics, where porous structures inside MNs with continuous nano- or micro-sized pores can transport drugs or biofluids by capillary action. In addition, a wide range of materials, including non-polymers and polymers, were researched and used to form the porous structures of porous MNs. Adjustable porosity by different fabrication methods enables the achievement of sufficient mechanical strength by optimising fluid flows inside MNs. Moreover, biocompatible porous MNs integrated with biosensors can offer portable detection and rapid measurement of biomarkers in a minimally invasive manner. This review focuses on several aspects of current porous MN technology, including material selection, fabrication processes, biomedical applications, primarily covering transdermal drug delivery, ISF extraction, and biosensing, along with future prospects as well as challenges.
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Affiliation(s)
- Leilei Bao
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
| | - Jongho Park
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
| | | | - Beomjoon Kim
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan.
- LIMMS/CNRS-IIS UMI 2820, The University of Tokyo, Tokyo, Japan.
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11
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Gomes KB, D'Souza B, Vijayanand S, Menon I, D'Souza MJ. A Dual-Delivery Platform for Vaccination using Antigen-loaded Nanoparticles in Dissolving Microneedles. Int J Pharm 2021; 613:121393. [PMID: 34929312 DOI: 10.1016/j.ijpharm.2021.121393] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 12/08/2021] [Accepted: 12/13/2021] [Indexed: 10/19/2022]
Abstract
Effective vaccines delivered via painless methods would revolutionize the way people approach vaccinations. This study focused on the development of fast-dissolving microneedles (MNs) to deliver antigen-loaded sustained release polymeric nanoparticles (NPs), achieving a dual-delivery platform for vaccination through the skin. The platform utilizes dissolving MNs (dMNs), which penetrate to the epidermal layer of the skin and rapidly dissolve, releasing the antigen-loaded NPs. In this study, seven dissolving microneedle formulations were tested based on screening of various biocompatible and biodegradable polymers and sugars. The lead dMN formulation was selected based on optimal mechanical strength and dissolution of the needles and was loaded with poly(lactic-co-glycolic) acid (PLGA) NPs encapsulating a model influenza matrix 2 (M2) protein antigen. Antigen-loading efficiency in the needles was determined by centrifugation of the lead formulation containing various concentrations of antigen nanoparticles. Next, the reproducibility and translatability of ex vivo mechanical strength and dissolvability of the lead M2 PLGA NP-loaded dMN formulation was assessed by formulating and testing two different microneedle arrays on murine and porcine skin. Finally, the lead microneedle array was loaded with fluorescent dye NPs and evaluated for pore formation and closure in vivo in a murine model. This proof-of-concept study yielded an easy-to-formulate, well-characterized, translatable antigen NP-loaded dMN platform for transdermal vaccine administration.
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Affiliation(s)
- Keegan Braz Gomes
- Vaccine Nanotechnology Laboratory, Center for Drug Delivery, Department of Pharmaceutical Sciences, Mercer University College of Pharmacy, Mercer University Health Sciences Center, Atlanta, GA USA
| | - Bernadette D'Souza
- Department of Pharmaceutical, Social and Administrative Sciences, McWhorter School of Pharmacy, College of Health Sciences, Samford University, Birmingham, AL USA
| | - Sharon Vijayanand
- Vaccine Nanotechnology Laboratory, Center for Drug Delivery, Department of Pharmaceutical Sciences, Mercer University College of Pharmacy, Mercer University Health Sciences Center, Atlanta, GA USA
| | - Ipshita Menon
- Vaccine Nanotechnology Laboratory, Center for Drug Delivery, Department of Pharmaceutical Sciences, Mercer University College of Pharmacy, Mercer University Health Sciences Center, Atlanta, GA USA
| | - Martin J D'Souza
- Vaccine Nanotechnology Laboratory, Center for Drug Delivery, Department of Pharmaceutical Sciences, Mercer University College of Pharmacy, Mercer University Health Sciences Center, Atlanta, GA USA.
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12
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Coaxial electrospray of uniform polylactide core-shell microparticles for long-acting contraceptive. J Control Release 2021; 341:634-645. [PMID: 34921972 DOI: 10.1016/j.jconrel.2021.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 12/08/2021] [Accepted: 12/11/2021] [Indexed: 10/19/2022]
Abstract
Despite its high efficacy and good patient compliance, the only long-acting injectable (LAI) contraceptive currently available in the US, depot medroxyprogesterone acetate (DMPA), is limited by significant side effects and a delayed return to fertility for up to 10 months after its intended duration of action. To overcome these limitations, we sought to develop an injectable poly(D,l-lactide) (PLA) microparticle for sustained release of contraceptive hormone, etonogestrel (ENG). A one-step technique, coaxial electrospray method was applied to prepare uniform ENG loaded core-shell structured and slow-degrading PLA microparticles (ENG-cs-MPs) to provide release control while minimizing polymer content. By adjusting voltage, polymer concentration and flow rate of the coaxial jetting solution, the prepared ENG-cs-MPs exhibited uniformly small particle size with volume mean diameter of 14.7 ± 0.5 μm and a shell thickness of 2.5 ± 0.1 μm, high drug loading of ~54%, high encapsulation efficiency of ~99%, and initial 1-day burst release of just ~10%. Long-term in vitro release of ENG was continuous for more than 3 months without change of the shell structure in 6 months. In PK studies, ENG-cs-MPs achieved a steady and continuous drug release for approximately 3 months and then quickly tapered off within 3 weeks. Hence, ENG-cs-MPs prepared by the coaxial electrospray method may be useful as a LAI contraceptive with an improved PK profile relative to DMPA.
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13
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Albert J, Chang RS, Garcia GA, Schwendeman SP. Metal‐HisTag
Coordination for Remote Loading of Very Small Quantities of Biomacromolecules into
PLGA
Microspheres. Bioeng Transl Med 2021; 7:e10272. [PMID: 35600641 PMCID: PMC9115689 DOI: 10.1002/btm2.10272] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/14/2021] [Accepted: 11/16/2021] [Indexed: 11/19/2022] Open
Abstract
Challenges to discovery and preclinical development of long‐acting release systems for protein therapeutics include protein instability, use of organic solvents during encapsulation, specialized equipment and personnel, and high costs of proteins. We sought to overcome these issues by combining remote‐loading self‐healing encapsulation with binding HisTag protein to transition metal ions. Porous, drug‐free self‐healing microspheres of copolymers of lactic and glycolic acids with high molecular weight dextran sulfate and immobilized divalent transition metal (M2+) ions were placed in the presence of proteins with or without HisTags to bind the protein in the pores of the polymer before healing the surface pores with modest temperature. Using human serum albumin, insulin‐like growth factor 1, and granulocyte‐macrophage colony‐stimulating factor (GM‐CSF), encapsulated efficiencies of immunoreactive protein relative to nonencapsulation protein solutions increased from ~41%, ~23%, and ~9%, respectively, without Zn2+ and HisTags to ~100%, ~83%, and ~75% with Zn2+ and HisTags. These three proteins were continuously released in immunoreactive form over seven to ten weeks to 73%–100% complete release, and GM‐CSF showed bioactivity >95% relative to immunoreactive protein throughout the release interval. Increased encapsulation efficiencies were also found with other divalent transition metals ions (Co2+, Cu2+, Ni2+, and Zn2+), but not with Ca2+. Ethylenediaminetetraacetic acid was found to interfere with this process, reverting encapsulation efficiency back to Zn2+‐free levels. These results indicate that M2+‐immobilized self‐healing microspheres can be prepared for simple and efficient encapsulation by simple mixing in aqueous solutions. These formulations provide slow and continuous release of immunoreactive proteins of diverse types by using a amount of protein (e.g., <10 μg), which may be highly useful in the discovery and early preclinical development phase of new protein active pharmaceutical ingredients, allowing for improved translation to further development of potent proteins for local delivery.
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Affiliation(s)
- Jason Albert
- Department of Pharmaceutical Sciences and the Biointerfaces Institute University of Michigan 2800 Plymouth Rd Ann Arbor MI USA
| | - Rae Sung Chang
- Department of Pharmaceutical Sciences and the Biointerfaces Institute University of Michigan 2800 Plymouth Rd Ann Arbor MI USA
| | - George A. Garcia
- Department of Medicinal Chemistry University of Michigan 2800 Plymouth Rd Ann Arbor MI USA
| | - Steven P. Schwendeman
- Department of Pharmaceutical Sciences and the Biointerfaces Institute University of Michigan 2800 Plymouth Rd Ann Arbor MI USA
- Department of Biomedical Engineering University of Michigan 2800 Plymouth Rd Ann Arbor MI USA
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14
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Preparation, characterization, and in vivo evaluation of levonorgestrel-loaded thermostable microneedles. Drug Deliv Transl Res 2021; 12:944-956. [PMID: 34515951 DOI: 10.1007/s13346-021-01057-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2021] [Indexed: 10/20/2022]
Abstract
To facilitate the storage and use of poly (lactic-co-glycolic acid) (PLGA)-based microneedles (MNs) in hot seasons and regions, thermally stable MNs loaded with levonorgestrel (LNG) were developed. Due to its good biocompatibility and high glass transition temperature (Tg), Hydroxypropyl methylcellulose (HPMC) was added to the PLGA-based MNs to increase thermal stability. MNs with HPMC exhibited excellent thermal stability at high temperatures. After the MNs has been applied to the skin for 10 min, the backing layer of the MNs was dissolved by contact with the interstitial fluid of skin, which resulted in the separation of the MN tips from the backing layer. The MN tips were implanted intradermally and sustained-release LNG. Biodegradable polymers were used to encapsulate the LNG, providing long-acting contraception. The in vitro release rate of LNG from the MNs reached 72.78%-83.76% within 21 days. In rats, the MNs maintained plasma concentrations of LNG above the human contraceptive level for 8-12 days. In mice, the time required for complete degradation of the MN tips was 12-16 days. MNs have excellent medication adherence due to the advantages of painlessness, minimally invasive, and self-administered. MNs can make long-acting contraceptives more readily available to humans.
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15
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Sully RE, Moore CJ, Garelick H, Loizidou E, Podoleanu AG, Gubala V. Nanomedicines and microneedles: a guide to their analysis and application. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:3326-3347. [PMID: 34313266 DOI: 10.1039/d1ay00954k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The fast-advancing progress in the research of nanomedicine and microneedle applications in the past two decades has suggested that the combination of the two concepts could help to overcome some of the challenges we are facing in healthcare. They include poor patient compliance with medication and the lack of appropriate administration forms that enable the optimal dose to reach the target site. Nanoparticles as drug vesicles can protect their cargo and deliver it to the target site, while evading the body's defence mechanisms. Unfortunately, despite intense research on nanomedicine in the past 20 years, we still haven't answered some crucial questions, e.g. about their colloidal stability in solution and their optimal formulation, which makes the translation of this exciting technology from the lab bench to a viable product difficult. Dissolvable microneedles could be an effective way to maintain and stabilise nano-sized formulations, whilst enhancing the ability of nanoparticles to penetrate the stratum corneum barrier. Both concepts have been individually investigated fairly well and many analytical techniques for tracking the fate of nanomaterials with their precious cargo, both in vitro and in vivo, have been established. Yet, to the best of our knowledge, a comprehensive overview of the analytical tools encompassing the concepts of microneedles and nanoparticles with specific and successful examples is missing. In this review, we have attempted to briefly analyse the challenges associated with nanomedicine itself, but crucially we provide an easy-to-navigate scheme of methods, suitable for characterisation and imaging the physico-chemical properties of the material matrix.
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Affiliation(s)
- Rachel E Sully
- Medway School of Pharmacy, Universities of Greenwich and Kent, Anson Building, Central Avenue, Chatham, ME4 4TB, UK.
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16
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Zhang L, Guo R, Wang S, Yang X, Ling G, Zhang P. Fabrication, evaluation and applications of dissolving microneedles. Int J Pharm 2021; 604:120749. [PMID: 34051319 DOI: 10.1016/j.ijpharm.2021.120749] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 05/20/2021] [Accepted: 05/24/2021] [Indexed: 01/25/2023]
Abstract
In recent years, transdermal preparations have emerged as one of the most promising modes of administration. In particular, dissolving microneedles have attracted extensive attention because of their painlessness, safety, high delivery efficiency and easily operation for patients. This article mainly reviews the preparation methods, the types of matrix polymer materials, the content of dissolving microneedles performance testing, and the applications of dissolving microneedles. It is expected to lay a solid knowledge foundation for the in-depth study of the dissolving microneedles.
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Affiliation(s)
- Lijing Zhang
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Ranran Guo
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Siqi Wang
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Xiaotong Yang
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China
| | - Guixia Ling
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China.
| | - Peng Zhang
- Wuya College of Innovation, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang 110016, China.
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17
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Microarray patches enable the development of skin-targeted vaccines against COVID-19. Adv Drug Deliv Rev 2021; 171:164-186. [PMID: 33539853 PMCID: PMC8060128 DOI: 10.1016/j.addr.2021.01.022] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 01/10/2021] [Accepted: 01/27/2021] [Indexed: 12/13/2022]
Abstract
The COVID-19 pandemic is a serious threat to global health and the global economy. The ongoing race to develop a safe and efficacious vaccine to prevent infection by SARS-CoV-2, the causative agent for COVID-19, highlights the importance of vaccination to combat infectious pathogens. The highly accessible cutaneous microenvironment is an ideal target for vaccination since the skin harbors a high density of antigen-presenting cells and immune accessory cells with broad innate immune functions. Microarray patches (MAPs) are an attractive intracutaneous biocargo delivery system that enables safe, reproducible, and controlled administration of vaccine components (antigens, with or without adjuvants) to defined skin microenvironments. This review describes the structure of the SARS-CoV-2 virus and relevant antigenic targets for vaccination, summarizes key concepts of skin immunobiology in the context of prophylactic immunization, and presents an overview of MAP-mediated cutaneous vaccine delivery. Concluding remarks on MAP-based skin immunization are provided to contribute to the rational development of safe and effective MAP-delivered vaccines against emerging infectious diseases, including COVID-19.
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18
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Forigua A, Kirsch RL, Willerth SM, Elvira KS. Recent advances in the design of microfluidic technologies for the manufacture of drug releasing particles. J Control Release 2021; 333:258-268. [PMID: 33766691 DOI: 10.1016/j.jconrel.2021.03.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 12/26/2022]
Abstract
Drug releasing particles are valued for their ability to deliver therapeutics to targeted locations and for their controllable release patterns. The development of microfluidic technologies, which are designed specifically to manipulate small amounts of fluids, to manufacture particles for drug delivery applications reflects a recent trend due to the advantages they confer in terms of control over particle size and material composition. This review takes a comprehensive look at the different types of microfluidic devices used to fabricate such particles from different types of biomaterials, and at how the on-chip features enable the production of particles with different types of properties. The review concludes by suggesting avenues for future work that will enable these technologies to fulfill their potential and be used in industrial settings for the manufacture of drug releasing particles with unique capabilities.
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Affiliation(s)
- Alejandro Forigua
- Department of Chemistry, University of Victoria, Victoria, BC V8W 2Y2, Canada
| | - Rebecca L Kirsch
- Department of Chemistry, University of Victoria, Victoria, BC V8W 2Y2, Canada; Department of Mechanical Engineering, University of Victoria, Victoria, BC V8W 2Y2, Canada
| | - Stephanie M Willerth
- Department of Mechanical Engineering, University of Victoria, Victoria, BC V8W 2Y2, Canada; Division of Medical Sciences, University of Victoria, Victoria, BC V8W 2Y2, Canada.
| | - Katherine S Elvira
- Department of Chemistry, University of Victoria, Victoria, BC V8W 2Y2, Canada.
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19
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Makvandi P, Kirkby M, Hutton ARJ, Shabani M, Yiu CKY, Baghbantaraghdari Z, Jamaledin R, Carlotti M, Mazzolai B, Mattoli V, Donnelly RF. Engineering Microneedle Patches for Improved Penetration: Analysis, Skin Models and Factors Affecting Needle Insertion. NANO-MICRO LETTERS 2021; 13:93. [PMID: 34138349 PMCID: PMC8006208 DOI: 10.1007/s40820-021-00611-9] [Citation(s) in RCA: 126] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/05/2021] [Indexed: 05/14/2023]
Abstract
Transdermal microneedle (MN) patches are a promising tool used to transport a wide variety of active compounds into the skin. To serve as a substitute for common hypodermic needles, MNs must pierce the human stratum corneum (~ 10 to 20 µm), without rupturing or bending during penetration. This ensures that the cargo is released at the predetermined place and time. Therefore, the ability of MN patches to sufficiently pierce the skin is a crucial requirement. In the current review, the pain signal and its management during application of MNs and typical hypodermic needles are presented and compared. This is followed by a discussion on mechanical analysis and skin models used for insertion tests before application to clinical practice. Factors that affect insertion (e.g., geometry, material composition and cross-linking of MNs), along with recent advancements in developed strategies (e.g., insertion responsive patches and 3D printed biomimetic MNs using two-photon lithography) to improve the skin penetration are highlighted to provide a backdrop for future research.
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Affiliation(s)
- Pooyan Makvandi
- Istituto Italiano Di Tecnologia, Centre for Materials Interface, Viale Rinaldo Piaggio 34, 56025, Pontedera, Pisa, Italy.
| | - Melissa Kirkby
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7BL, UK
| | - Aaron R J Hutton
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7BL, UK
| | - Majid Shabani
- Istituto Italiano Di Tecnologia, Centre for Materials Interface, Viale Rinaldo Piaggio 34, 56025, Pontedera, Pisa, Italy
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale Rinaldo Piaggio 34, 56025, Pontedera, Pisa, Italy
| | - Cynthia K Y Yiu
- Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, Hong Kong SAR, China
| | - Zahra Baghbantaraghdari
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, 80125, Naples, Italy
| | - Rezvan Jamaledin
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, 80125, Naples, Italy
- Center for Advanced Biomaterials for Health Care (iit@CRIB), Italian Institute of Technology, 80125, Naples, Italy
| | - Marco Carlotti
- Istituto Italiano Di Tecnologia, Centre for Materials Interface, Viale Rinaldo Piaggio 34, 56025, Pontedera, Pisa, Italy
| | - Barbara Mazzolai
- Istituto Italiano Di Tecnologia, Centre for Materials Interface, Viale Rinaldo Piaggio 34, 56025, Pontedera, Pisa, Italy
| | - Virgilio Mattoli
- Istituto Italiano Di Tecnologia, Centre for Materials Interface, Viale Rinaldo Piaggio 34, 56025, Pontedera, Pisa, Italy.
| | - Ryan F Donnelly
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7BL, UK.
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20
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Engineered drug delivery devices to address Global Health challenges. J Control Release 2021; 331:503-514. [PMID: 33516755 PMCID: PMC7842133 DOI: 10.1016/j.jconrel.2021.01.035] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 12/11/2022]
Abstract
There is a dire need for innovative solutions to address global health needs. Polymeric systems have been shown to provide substantial benefit to all sectors of healthcare, especially for their ability to extend and control drug delivery. Herein, we review polymeric drug delivery devices for vaccines, tuberculosis, and contraception.
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21
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Korkmaz E, Balmert SC, Carey CD, Erdos G, Falo LD. Emerging skin-targeted drug delivery strategies to engineer immunity: A focus on infectious diseases. Expert Opin Drug Deliv 2021; 18:151-167. [PMID: 32924651 PMCID: PMC9355143 DOI: 10.1080/17425247.2021.1823964] [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] [Indexed: 01/11/2023]
Abstract
INTRODUCTION Infectious pathogens are global disrupters. Progress in biomedical science and technology has expanded the public health arsenal against infectious diseases. Specifically, vaccination has reduced the burden of infectious pathogens. Engineering systemic immunity by harnessing the cutaneous immune network has been particularly attractive since the skin is an easily accessible immune-responsive organ. Recent advances in skin-targeted drug delivery strategies have enabled safe, patient-friendly, and controlled deployment of vaccines to cutaneous microenvironments for inducing long-lived pathogen-specific immunity to mitigate infectious diseases, including COVID-19. AREAS COVERED This review briefly discusses the basics of cutaneous immunomodulation and provides a concise overview of emerging skin-targeted drug delivery systems that enable safe, minimally invasive, and effective intracutaneous administration of vaccines for engineering systemic immune responses to combat infectious diseases. EXPERT OPINION In-situ engineering of the cutaneous microenvironment using emerging skin-targeted vaccine delivery systems offers remarkable potential to develop diverse immunization strategies against pathogens. Mechanistic studies with standard correlates of vaccine efficacy will be important to compare innovative intracutaneous drug delivery strategies to each other and to existing clinical approaches. Cost-benefit analyses will be necessary for developing effective commercialization strategies. Significant involvement of industry and/or government will be imperative for successfully bringing novel skin-targeted vaccine delivery methods to market for their widespread use.
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Affiliation(s)
- Emrullah Korkmaz
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA,Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Stephen C. Balmert
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Cara Donahue Carey
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Geza Erdos
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Louis D. Falo
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA,Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA,UPMC Hillman Cancer Center, Pittsburgh, PA, USA,Clinical and Translational Science Institute, University of Pittsburgh, Pittsburgh, PA, USA,The McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
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22
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Kim Y, Sah H. Protein Loading into Spongelike PLGA Microspheres. Pharmaceutics 2021; 13:137. [PMID: 33494293 PMCID: PMC7909807 DOI: 10.3390/pharmaceutics13020137] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 01/18/2021] [Accepted: 01/19/2021] [Indexed: 11/26/2022] Open
Abstract
A self-healing microencapsulation process involves mixing preformed porous microspheres in an aqueous solution containing the desired protein and converting them into closed-pore microspheres. Spongelike poly-d,l-lactide-co-glycolide (PLGA) microspheres are expected to be advantageous to protein loading through self-healing. This study aimed to identify and assess relevant critical parameters, using lysozyme as a model protein. Several parameters governed lysozyme loading. The pore characteristics (open-pore, closed-pore, and porosity) of the preformed microspheres substantially affected lysozyme loading efficiency. The type of surfactant present in the aqueous medium also influenced lysozyme loading efficiency. For instance, cetyltrimethylammonium bromide showing a superior wetting functionality increased the extent of lysozyme loading more than twice as compared to Tween 80. Dried preformed microspheres were commonly used before, but our study found that wet microspheres obtained at the end of the microsphere manufacturing process displayed significant advantages in lysozyme loading. Not only could an incubation time for hydrating the microspheres be shortened dramatically, but also a much more considerable amount of lysozyme was encapsulated. Interestingly, the degree of microsphere hydration determined the microstructure and morphology of closed-pore microspheres after self-healing. Understanding these critical process parameters would help tailor protein loading into spongelike PLGA microspheres in a bespoke manner.
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Affiliation(s)
- Yuyoung Kim
- College of Pharmacy, Ewha Womans University, 52 Ewhayeodaegil, Seodaemun-gu, Seoul 03760, Korea;
- Pharmaceutical Product Research Laboratories, Dong-A ST R&D Center, 21, Geumhwa-ro 105beon-gil, Giheung-gu, Yongin-si, Gyeonggi-do 17073, Korea
| | - Hongkee Sah
- College of Pharmacy, Ewha Womans University, 52 Ewhayeodaegil, Seodaemun-gu, Seoul 03760, Korea;
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23
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Pahal S, Badnikar K, Ghate V, Bhutani U, Nayak MM, Subramanyam DN, Vemula PK. Microneedles for Extended Transdermal Therapeutics: A Route to Advanced Healthcare. Eur J Pharm Biopharm 2021; 159:151-169. [PMID: 33388372 DOI: 10.1016/j.ejpb.2020.12.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/10/2020] [Accepted: 12/22/2020] [Indexed: 11/17/2022]
Abstract
Sustained release of drugs over a pre-determined period is required to maintain an effective therapeutic dose for variety of drug delivery applications. Transdermal devices such as polymeric microneedle patches and other microneedle-based devices have been utilized for sustained release of their payload. Swift clearing of drugs can be prevented either by designing a slow-degrading polymeric matrix or by providing physiochemical triggers to different microneedle-based devices for on-demand release. These long-acting transdermal devices prevent the burst release of drugs. This review highlights the recent advances of microneedle-based devices for sustained release of vaccines, hormones, and antiretrovirals with their prospective safe clinical translation.
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Affiliation(s)
- Suman Pahal
- Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka 560065, India.
| | - Kedar Badnikar
- Department of Electronics Systems Engineering, Indian Institute of Science, Bangalore, Karnataka 560012, India
| | - Vivek Ghate
- Department of Electronics Systems Engineering, Indian Institute of Science, Bangalore, Karnataka 560012, India
| | - Utkarsh Bhutani
- Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka 560065, India
| | - Mangalore Manjunatha Nayak
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore, Karnataka 560012, India
| | | | - Praveen Kumar Vemula
- Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka 560065, India.
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24
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Lagreca E, Onesto V, Di Natale C, La Manna S, Netti PA, Vecchione R. Recent advances in the formulation of PLGA microparticles for controlled drug delivery. Prog Biomater 2020; 9:153-174. [PMID: 33058072 PMCID: PMC7718366 DOI: 10.1007/s40204-020-00139-y] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 09/28/2020] [Indexed: 12/14/2022] Open
Abstract
Polymeric microparticles (MPs) are recognized as very popular carriers to increase the bioavailability and bio-distribution of both lipophilic and hydrophilic drugs. Among different kinds of polymers, poly-(lactic-co-glycolic acid) (PLGA) is one of the most accepted materials for this purpose, because of its biodegradability (due to the presence of ester linkages that are degraded by hydrolysis in aqueous environments) and safety (PLGA is a Food and Drug Administration (FDA)-approved compound). Moreover, its biodegradability depends on the number of glycolide units present in the structure, indeed, lower glycol content results in an increased degradation time and conversely a higher monomer unit number results in a decreased time. Due to this feature, it is possible to design and fabricate MPs with a programmable and time-controlled drug release. Many approaches and procedures can be used to prepare MPs. The chosen fabrication methodology influences size, stability, entrapment efficiency, and MPs release kinetics. For example, lipophilic drugs as chemotherapeutic agents (doxorubicin), anti-inflammatory non-steroidal (indomethacin), and nutraceuticals (curcumin) were successfully encapsulated in MPs prepared by single emulsion technique, while water-soluble compounds, such as aptamer, peptides and proteins, involved the use of double emulsion systems to provide a hydrophilic compartment and prevent molecular degradation. The purpose of this review is to provide an overview about the preparation and characterization of drug-loaded PLGA MPs obtained by single, double emulsion and microfluidic techniques, and their current applications in the pharmaceutical industry.Graphic abstract.
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Affiliation(s)
- Elena Lagreca
- Center for Advanced Biomaterials for HealthCare@CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy
| | - Valentina Onesto
- Center for Advanced Biomaterials for HealthCare@CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy
| | - Concetta Di Natale
- Center for Advanced Biomaterials for HealthCare@CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy.
- Interdisciplinary Research Center of Biomaterials, CRIB, University Federico II, P.leTecchio 80, 80125, Naples, Italy.
| | - Sara La Manna
- Department of Pharmacy, CIRPEB: Centro Interuniversitario di Ricerca sui Peptidi Bioattivi, University of Naples "Federico II", Via Mezzocannone 16, 80134, Naples, Italy
| | - Paolo Antonio Netti
- Center for Advanced Biomaterials for HealthCare@CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy
- Interdisciplinary Research Center of Biomaterials, CRIB, University Federico II, P.leTecchio 80, 80125, Naples, Italy
- Department of Chemical, Materials and Industrial Production Engineering (DICMaPI), University of Naples Federico II, P.le Tecchio 80, 80125, Naples, Italy
| | - Raffaele Vecchione
- Center for Advanced Biomaterials for HealthCare@CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy.
- Interdisciplinary Research Center of Biomaterials, CRIB, University Federico II, P.leTecchio 80, 80125, Naples, Italy.
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25
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Onesto V, Di Natale C, Profeta M, Netti PA, Vecchione R. Engineered PLGA-PVP/VA based formulations to produce electro-drawn fast biodegradable microneedles for labile biomolecule delivery. Prog Biomater 2020; 9:203-217. [PMID: 33141337 PMCID: PMC7718351 DOI: 10.1007/s40204-020-00143-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 10/21/2020] [Indexed: 02/07/2023] Open
Abstract
Biodegradable polymer microneedles (MNs) are recognized as non-toxic, safe and stable systems for advanced drug delivery and cutaneous treatments, allowing a direct intradermal delivery and in some cases a controlled release. Most of the microneedles found in the literature are fabricated by micromolding, which is a multistep thus typically costly process. Due to industrial needs, mold-free methods represent a very intriguing approach in microneedle fabrication. Electro-drawing (ED) has been recently proposed as an alternative fast, mild temperature and one-step strategy to the mold-based techniques for the fabrication of poly(lactic-co-glycolic acid) (PLGA) biodegradable MNs. In this work, taking advantage of the flexibility of the ED technology, we engineered microneedle inner microstructure by acting on the water-in-oil (W/O) precursor emulsion formulation to tune drug release profile. Particularly, to promote a faster release of the active pharmaceutical ingredient, we substituted part of PLGA with poly(1-vinylpyrrolidone-co-vinyl acetate) (PVP/VA), as compared to the PLGA alone in the matrix material. Moreover, we introduced lecithin and maltose as emulsion stabilizers. Microneedle inner structural analysis as well as collagenase entrapment efficiency, release and activity of different emulsion formulations were compared to reach an interconnected porosity MN structure, aimed at providing an efficient protein release profile. Furthermore, MN mechanical properties were examined as well as its ability to pierce the stratum corneum on a pig skin model, while the drug diffusion from the MN body was monitored in an in vitro collagen-based dermal model at selected time points.
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Affiliation(s)
- Valentina Onesto
- Center for Advanced Biomaterials for Health Care, CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy.
| | - Concetta Di Natale
- Center for Advanced Biomaterials for Health Care, CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy.,Interdisciplinary Research Center of Biomaterials, CRIB, University Federico II, P.leTecchio 80, 80125, Naples, Italy
| | - Martina Profeta
- Center for Advanced Biomaterials for Health Care, CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy
| | - Paolo Antonio Netti
- Center for Advanced Biomaterials for Health Care, CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy.,Interdisciplinary Research Center of Biomaterials, CRIB, University Federico II, P.leTecchio 80, 80125, Naples, Italy
| | - Raffaele Vecchione
- Center for Advanced Biomaterials for Health Care, CRIB, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy. .,Interdisciplinary Research Center of Biomaterials, CRIB, University Federico II, P.leTecchio 80, 80125, Naples, Italy.
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Mitragotri S. Bioengineering & Translational Medicine: Year 2020 in review. Bioeng Transl Med 2020; 5:e10178. [PMID: 33005741 PMCID: PMC7510453 DOI: 10.1002/btm2.10178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 08/02/2020] [Indexed: 01/02/2023] Open
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Jamaledin R, Makvandi P, Yiu CKY, Agarwal T, Vecchione R, Sun W, Maiti TK, Tay FR, Netti PA. Engineered Microneedle Patches for Controlled Release of Active Compounds: Recent Advances in Release Profile Tuning. ADVANCED THERAPEUTICS 2020. [DOI: 10.1002/adtp.202000171] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Rezvan Jamaledin
- Department of Chemical, Materials & Industrial Production Engineering University of Naples Federico II Naples 80125 Italy
- Center for Advanced Biomaterials for Health Care (iit@CRIB) Italian Institute of Technology Naples 80125 Italy
| | - Pooyan Makvandi
- Center for Micro‐BioRobotics Istituto Italiano di Tecnologia (IIT) Viale R. Piaggio 34, 56025 Pontedera Pisa Italy
| | - Cynthia K. Y. Yiu
- Paediatric Dentistry and Orthodontics, Faculty of Dentistry, Prince Philip Dental Hospital The University of Hong Kong Hong Kong SAR China
| | - Tarun Agarwal
- Department of Biotechnology Indian Institute of Technology Kharagpur 721302 India
| | - Raffaele Vecchione
- Center for Advanced Biomaterials for Health Care (iit@CRIB) Italian Institute of Technology Naples 80125 Italy
| | - Wujin Sun
- Department of Bioengineering Center for Minimally Invasive Therapeutics University of California, Los Angeles Los Angeles CA 90095 USA
| | - Tapas Kumar Maiti
- Department of Biotechnology Indian Institute of Technology Kharagpur 721302 India
| | | | - Paolo Antonio Netti
- Center for Advanced Biomaterials for Health Care (iit@CRIB) Italian Institute of Technology Naples 80125 Italy
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28
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Jamaledin R, Sartorius R, Di Natale C, Vecchione R, De Berardinis P, Netti PA. Recombinant Filamentous Bacteriophages Encapsulated in Biodegradable Polymeric Microparticles for Stimulation of Innate and Adaptive Immune Responses. Microorganisms 2020; 8:microorganisms8050650. [PMID: 32365728 PMCID: PMC7285279 DOI: 10.3390/microorganisms8050650] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 04/24/2020] [Accepted: 04/27/2020] [Indexed: 11/24/2022] Open
Abstract
Escherichia coli filamentous bacteriophages (M13, f1, or fd) have attracted tremendous attention from vaccinologists as a promising immunogenic carrier and vaccine delivery vehicle with vast possible applications in the development of vaccines. The use of fd bacteriophage as an antigen delivery system is based on a modification of bacteriophage display technology. In particular, it is designed to express multiple copies of exogenous peptides (or polypeptides) covalently linked to viral capsid proteins. This study for the first time proposes the use of microparticles (MPs) made of poly (lactic-co-glycolic acid) (PLGA) to encapsulate fd bacteriophage. Bacteriophage–PLGA MPs were synthesized by a water in oil in water (w1/o/w2) emulsion technique, and their morphological properties were analyzed by confocal and scanning electron microscopy (SEM). Moreover, phage integrity, encapsulation efficiency, and release were investigated. Using recombinant bacteriophages expressing the ovalbumin (OVA) antigenic determinant, we demonstrated the immunogenicity of the encapsulated bacteriophage after being released by MPs. Our results reveal that encapsulated bacteriophages are stable and retain their immunogenic properties. Bacteriophage-encapsulated PLGA microparticles may thus represent an important tool for the development of different bacteriophage-based vaccine platforms.
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Affiliation(s)
- Rezvan Jamaledin
- Center for Advanced Biomaterials for Health Care (CABHC), Istituto Italiano di Tecnologia, 80125 Naples, Italy; (R.J.); (C.D.N.); (P.A.N.)
| | - Rossella Sartorius
- Institute of Biochemistry and Cell Biology (IBBC), CNR, 80131 Naples, Italy; (R.S.); (P.D.B.)
| | - Concetta Di Natale
- Center for Advanced Biomaterials for Health Care (CABHC), Istituto Italiano di Tecnologia, 80125 Naples, Italy; (R.J.); (C.D.N.); (P.A.N.)
- Department of Chemical Materials and Industrial Production (DICMAPI), University of Naples Federico II, 80125 Naples, Italy
| | - Raffaele Vecchione
- Center for Advanced Biomaterials for Health Care (CABHC), Istituto Italiano di Tecnologia, 80125 Naples, Italy; (R.J.); (C.D.N.); (P.A.N.)
- Correspondence:
| | | | - Paolo Antonio Netti
- Center for Advanced Biomaterials for Health Care (CABHC), Istituto Italiano di Tecnologia, 80125 Naples, Italy; (R.J.); (C.D.N.); (P.A.N.)
- Department of Chemical Materials and Industrial Production (DICMAPI), University of Naples Federico II, 80125 Naples, Italy
- Interdisciplinary Research Center of Biomaterials, CRIB, University Federico II, P.leTecchio 80, 80125 Naples, Italy
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29
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Shields CW, Wang LLW, Evans MA, Mitragotri S. Materials for Immunotherapy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1901633. [PMID: 31250498 DOI: 10.1002/adma.201901633] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/17/2019] [Indexed: 05/20/2023]
Abstract
Breakthroughs in materials engineering have accelerated the progress of immunotherapy in preclinical studies. The interplay of chemistry and materials has resulted in improved loading, targeting, and release of immunomodulatory agents. An overview of the materials that are used to enable or improve the success of immunotherapies in preclinical studies is presented, from immunosuppressive to proinflammatory strategies, with particular emphasis on technologies poised for clinical translation. The materials are organized based on their characteristic length scale, whereby the enabling feature of each technology is organized by the structure of that material. For example, the mechanisms by which i) nanoscale materials can improve targeting and infiltration of immunomodulatory payloads into tissues and cells, ii) microscale materials can facilitate cell-mediated transport and serve as artificial antigen-presenting cells, and iii) macroscale materials can form the basis of artificial microenvironments to promote cell infiltration and reprogramming are discussed. As a step toward establishing a set of design rules for future immunotherapies, materials that intrinsically activate or suppress the immune system are reviewed. Finally, a brief outlook on the trajectory of these systems and how they may be improved to address unsolved challenges in cancer, infectious diseases, and autoimmunity is presented.
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Affiliation(s)
- C Wyatt Shields
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, 02138, USA
| | - Lily Li-Wen Wang
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, 02138, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Michael A Evans
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, 02138, USA
| | - Samir Mitragotri
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, 02138, USA
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Molavi F, Barzegar-Jalali M, Hamishehkar H. Polyester based polymeric nano and microparticles for pharmaceutical purposes: A review on formulation approaches. J Control Release 2020; 320:265-282. [DOI: 10.1016/j.jconrel.2020.01.028] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/15/2020] [Accepted: 01/17/2020] [Indexed: 12/18/2022]
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Jamaledin R, Di Natale C, Onesto V, Taraghdari ZB, Zare EN, Makvandi P, Vecchione R, Netti PA. Progress in Microneedle-Mediated Protein Delivery. J Clin Med 2020; 9:E542. [PMID: 32079212 PMCID: PMC7073601 DOI: 10.3390/jcm9020542] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 02/12/2020] [Accepted: 02/13/2020] [Indexed: 02/06/2023] Open
Abstract
The growing demand for patient-compliance therapies in recent years has led to the development of transdermal drug delivery, which possesses several advantages compared with conventional methods. Delivering protein through the skin by transdermal patches is extremely difficult due to the presence of the stratum corneum which restricts the application to lipophilic drugs with relatively low molecular weight. To overcome these limitations, microneedle (MN) patches, consisting of micro/miniature-sized needles, are a promising tool to perforate the stratum corneum and to release drugs and proteins into the dermis following a non-invasive route. This review investigates the fabrication methods, protein delivery, and translational considerations for the industrial scaling-up of polymeric MNs for dermal protein delivery.
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Affiliation(s)
- Rezvan Jamaledin
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia (IIT@CRIB), 80125 Naples, Italy; (R.J.); (V.O.)
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, 80125 Naples, Italy;
| | - Concetta Di Natale
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia (IIT@CRIB), 80125 Naples, Italy; (R.J.); (V.O.)
| | - Valentina Onesto
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia (IIT@CRIB), 80125 Naples, Italy; (R.J.); (V.O.)
| | - Zahra Baghban Taraghdari
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, 80125 Naples, Italy;
| | | | - Pooyan Makvandi
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, 80125 Naples, Italy;
- Institute for polymers, Composites and biomaterials (IPCB), National research council (CNR), 80125 Naples, Italy
- Chemistry Department, Faculty of Science, Shahid Chamran University of Ahvaz, P.O. Box: 61537-53843, Ahvaz, Iran
| | - Raffaele Vecchione
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia (IIT@CRIB), 80125 Naples, Italy; (R.J.); (V.O.)
| | - Paolo Antonio Netti
- Center for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia (IIT@CRIB), 80125 Naples, Italy; (R.J.); (V.O.)
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, 80125 Naples, Italy;
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Badizadegan K, Goodson JL, Rota PA, Thompson KM. The potential role of using vaccine patches to induce immunity: platform and pathways to innovation and commercialization. Expert Rev Vaccines 2020; 19:175-194. [PMID: 32182145 PMCID: PMC7814398 DOI: 10.1080/14760584.2020.1732215] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 02/12/2020] [Indexed: 01/14/2023]
Abstract
Introduction: In the last two decades, the evidence related to using vaccine patches with multiple short projections (≤1 mm) to deliver vaccines through the skin increased significantly and demonstrated their potential as an innovative delivery platform.Areas covered: We review the vaccine patch literature published in English as of 1 March 2019, as well as available information from key stakeholders related to vaccine patches as a platform. We identify key research topics related to basic and translational science on skin physical properties and immunobiology, patch development, and vaccine manufacturing.Expert opinion: Currently, vaccine patch developers continue to address some basic science and other platform issues in the context of developing a potential vaccine patch presentation for an existing or new vaccine. Additional clinical data and manufacturing experience could shift the balance toward incentivizing existing vaccine manufactures to further explore the use of vaccine patches to deliver their products. Incentives for innovation of vaccine patches differ for developed and developing countries, which will necessitate different strategies (e.g. public-private partnerships, push, or pull mechanisms) to support the basic and applied research needed to ensure a strong evidence base and to overcome translational barriers for vaccine patches as a delivery platform.
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Affiliation(s)
| | - James L Goodson
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Paul A Rota
- Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA
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Micro-Pillar Integrated Dissolving Microneedles for Enhanced Transdermal Drug Delivery. Pharmaceutics 2019; 11:pharmaceutics11080402. [PMID: 31405191 PMCID: PMC6724014 DOI: 10.3390/pharmaceutics11080402] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 08/02/2019] [Accepted: 08/08/2019] [Indexed: 01/05/2023] Open
Abstract
The dissolving microneedle (DMN) patch is a transdermal delivery system, containing arrays of micro-sized polymeric needles capable of encapsulating therapeutic drugs within their matrix and releasing them into the skin. However, the elastic properties of the skin prevent DMNs from complete insertion and accurate delivery of encapsulated compounds into the skin. Moreover, the adhesive materials used in patches may cause skin irritation, inflammation, and redness. Therefore, we developed a patchless, micro-pillar integrated DMN (P-DMN) that is simple to fabricate and enhances transdermal drug delivery compared with traditional DMN patches. The micro-pillars were made of polymethyl methacrylate at a height of 300 μm and a base diameter of 500 μm. To fabricate P-DMNs, we employed hyaluronic acid, which is a widely used derma filler and plays a role in tissue re-epithelialization. We demonstrate that utilizing P-DMNs significantly improves the delivery efficiency of an encapsulated drug surrogate (91.83% ± 7.75%) compared with traditional DMNs (64.86% ± 8.17%). Interestingly, P-DMNs remarkably increase the skin penetration accuracy rate of encapsulated drugs, up to 97.78% ± 2.22%, compared with 44.44% ± 7.85% in traditional DMNs. Our findings suggest that P-DMNs could serve as a highly accurate and efficient platform for transdermal delivery of various types of micro- and macro-biomolecules.
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