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Chen L, Cui L, Ran J, Liu Z, Zhu X. Transdermal delivery of botulinum toxin-A through phosphatidylcholine/cholesterol nanoliposomes for treatment of post-acne scarring. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2024; 35:41. [PMID: 39073502 PMCID: PMC11286643 DOI: 10.1007/s10856-024-06810-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 06/25/2024] [Indexed: 07/30/2024]
Abstract
As an acne sequela, post-acne scarring (PSA) has huge negative impact on sufferers' quality of life because of aesthetical embarrassment. Transdermal delivery of botulinum toxin-A (BTXA) is a promising strategy for PAS treatment, but currently reported approaches are far from satisfactory. In this work, phosphatidylcholine/cholesterol (PC/Chol) nanoliposomes were utilized for encapsulation and transdermal delivery of BTXA. The composition, structure, morphology, size, size distribution, etc. of as-prepared BTXA@liposome nanoparticles were investigated in detail. Simulated transdermal delivery assay indicated that the diffusion depth of the BXTA@liposome nanoparticles was nearly 8 times that of pure BTXA and reached 380 μm. 12 facial PSA patients were recruited to evaluate the curative effect of the BTXA@liposome nanoparticles on PSA. Through ECCA (échelle d'évaluation clinique des cicatrices d'acné) scoring and self-evaluation of patients, the resultant data indicated that compared to hyaluronic acid (HA) hydrogel treatment the BTXA@liposome/HA hydrogel treatment could better relieve PSA to some extent but didn't show significant advantage. Further work is needed to verify the feasibility and curative effect of this method in PSA treatment in the future.
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Affiliation(s)
- Lannan Chen
- Department of Medical Cosmetology, The First Clinical Medical College of China Three Gorges University, Yichang Central People's Hospital, Institute of Medical Cosmetology, China Three Gorges University, Yichang, China
| | - Lei Cui
- Department of Medical Cosmetology, The First Clinical Medical College of China Three Gorges University, Yichang Central People's Hospital, Institute of Medical Cosmetology, China Three Gorges University, Yichang, China.
| | - Jiabing Ran
- College of Biological & Pharmaceutical Sciences, China Three Gorges University, Yichang, China.
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, China.
| | - Zhengrui Liu
- Department of Medical Cosmetology, The First Clinical Medical College of China Three Gorges University, Yichang Central People's Hospital, Institute of Medical Cosmetology, China Three Gorges University, Yichang, China
| | - Xiongbin Zhu
- College of Biological & Pharmaceutical Sciences, China Three Gorges University, Yichang, China
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang, China
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Loh JM, Lim YJL, Tay JT, Cheng HM, Tey HL, Liang K. Design and fabrication of customizable microneedles enabled by 3D printing for biomedical applications. Bioact Mater 2024; 32:222-241. [PMID: 37869723 PMCID: PMC10589728 DOI: 10.1016/j.bioactmat.2023.09.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 08/22/2023] [Accepted: 09/30/2023] [Indexed: 10/24/2023] Open
Abstract
Microneedles (MNs) is an emerging technology that employs needles ranging from 10 to 1000 μm in height, as a minimally invasive technique for various procedures such as therapeutics, disease monitoring and diagnostics. The commonly used method of fabrication, micromolding, has the advantage of scalability, however, micromolding is unable to achieve rapid customizability in dimensions, geometries and architectures, which are the pivotal factors determining the functionality and efficacy of the MNs. 3D printing offers a promising alternative by enabling MN fabrication with high dimensional accuracy required for precise applications, leading to improved performance. Furthermore, enabled by its customizability and one-step process, there is propitious potential for growth for 3D-printed MNs especially in the field of personalized and on-demand medical devices. This review provides an overview of considerations for the key parameters in designing MNs, an introduction on the various 3D-printing techniques for fabricating this new generation of MNs, as well as highlighting the advancements in biomedical applications facilitated by 3D-printed MNs. Lastly, we offer some insights into the future prospects of 3D-printed MNs, specifically its progress towards translation and entry into market.
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Affiliation(s)
- Jia Min Loh
- A*STAR Skin Research Labs (A*SRL), Agency for Science, Technology and Research (A*STAR), Singapore
| | - Yun Jie Larissa Lim
- A*STAR Skin Research Labs (A*SRL), Agency for Science, Technology and Research (A*STAR), Singapore
| | - Jin Ting Tay
- A*STAR Skin Research Labs (A*SRL), Agency for Science, Technology and Research (A*STAR), Singapore
| | | | - Hong Liang Tey
- National Skin Centre (NSC), Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
- Yong Loo Ling School of Medicine, National University of Singapore, Singapore
- Skin Research Institute of Singapore, Singapore
| | - Kun Liang
- A*STAR Skin Research Labs (A*SRL), Agency for Science, Technology and Research (A*STAR), Singapore
- Skin Research Institute of Singapore, Singapore
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Malek-Khatabi A, Rad-Malekshahi M, Shafiei M, Sharifi F, Motasadizadeh H, Ebrahiminejad V, Rad-Malekshahi M, Akbarijavar H, Faraji Rad Z. Botulinum toxin A dissolving microneedles for hyperhidrosis treatment: design, formulation and in vivo evaluation. Biomater Sci 2023; 11:7784-7804. [PMID: 37905676 DOI: 10.1039/d3bm01301d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Multiple periodic injections of botulinum toxin A (BTX-A) are the standard treatment of hyperhidrosis which causes excessive sweating. However, BTX-A injections can create problems, including incorrect and painful injections, the risk of drug entry into the bloodstream, the need for medical expertise, and waste disposal problems. New drug delivery systems can substantially reduce these problems. Transdermal delivery is an effective alternative to conventional BTX-A injections. However, BTX-A's large molecular size and susceptibility to degradation complicate transdermal delivery. Dissolving microneedle patches (DMNPs) encapsulated with BTX-A (BTX-A/DMNPs) are a promising solution that can penetrate the dermis painlessly and provide localized translocation of BTX-A. In this study, using high-precision 3D laser lithography and subsequent molding, DMNPs were prepared based on a combination of biocompatible polyvinylpyrrolidone and hyaluronic acid polymers to deliver BTX-A with ultra-sharp needle tips of 1.5 ± 0.5 µm. Mechanical, morphological and histological assessments of the prepared DMNPs were performed to optimize their physicochemical properties. Furthermore, the BTX-A release and diffusion kinetics across the skin layers were investigated. A COMSOL simulation was conducted to study the diffusion process. The primary stability analysis reported significant stability for three months. Finally, the functionality of the BTX-A/DMNPs for the suppression of sweat glands was confirmed on the hyperhidrosis mouse footpad, which drastically reduced sweat gland activity. The results demonstrate that these engineered DMNPs can be an effective, painless, inexpensive alternative to hypodermic injections when treating hyperhidrosis.
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Affiliation(s)
- Atefeh Malek-Khatabi
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mazda Rad-Malekshahi
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Morvarid Shafiei
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, Iran
| | - Fatemeh Sharifi
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran
| | - Hamidreza Motasadizadeh
- Department of Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Vahid Ebrahiminejad
- School of Engineering, University of Southern Queensland, Springfield, Queensland, 4300, Australia.
| | | | - Hamid Akbarijavar
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
- Department of Pharmaceutics, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Faraji Rad
- School of Engineering, University of Southern Queensland, Springfield, Queensland, 4300, Australia.
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Shen Y, Shah SR, Zhao K, Han B. Experimental and computational analysis of the injection-induced mechanical changes in the skin microenvironment during subcutaneous injection of biologics. EXTREME MECHANICS LETTERS 2023; 61:102025. [PMID: 37304308 PMCID: PMC10249613 DOI: 10.1016/j.eml.2023.102025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Subcutaneous (SQ) injection is an effective delivery route for various biologics, including proteins, antibodies, and vaccines. However, pain and discomfort induced during SQ injection pose a notable challenge for the broader and routine use of biologics. Understanding the underlying mechanism and quantification of injection-induced pain and discomfort (IPD) are urgently needed. A crucial knowledge gap is what changes in the skin tissue microenvironment are induced by the SQ injection, which may ultimately cause the IPD. In this study, thus, a hypothesis is postulated that the injection of biologics solution through the skin tissue microenvironment induces spatiotemporal mechanical changes. Specifically, the injection leads to tissue swelling and subsequent increases in the interstitial fluid pressure (IFP) and matrix stress around the injection site, which ultimately causes the IPD. To test this hypothesis, an engineered SQ injection model is developed capable of measuring tissue swelling during SQ injection. The injection model consists of a skin equivalent with quantum dot-labeled fibroblasts, which enables the measurement of injection-induced spatiotemporal deformation. The IFP and matrix stress are further estimated by computational analysis approximating the skin equivalent as a nonlinear poroelastic material. The result confirms significant injection-induced tissue swelling and increases in IFP and matrix stress. The extent of deformation is correlated to the injection rate. The results also suggest that the size of biologics particulates significantly affects the pattern and extent of the deformation. The results are further discussed to propose a quantitative understanding of the injection-induced changes in the skin microenvironment.
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Affiliation(s)
- Yingnan Shen
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA
| | | | - Kejie Zhao
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA
| | - Bumsoo Han
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
- Purdue Institute for Cancer Research, Purdue University, West Lafayette, IN, USA
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Nguyen HX, Nguyen CN. Microneedle-Mediated Transdermal Delivery of Biopharmaceuticals. Pharmaceutics 2023; 15:pharmaceutics15010277. [PMID: 36678906 PMCID: PMC9864466 DOI: 10.3390/pharmaceutics15010277] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/05/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
Transdermal delivery provides numerous benefits over conventional routes of administration. However, this strategy is generally limited to a few molecules with specific physicochemical properties (low molecular weight, high potency, and moderate lipophilicity) due to the barrier function of the stratum corneum layer. Researchers have developed several physical enhancement techniques to expand the applications of the transdermal field; among these, microneedle technology has recently emerged as a promising platform to deliver therapeutic agents of any size into and across the skin. Typically, hydrophilic biomolecules cannot penetrate the skin by passive diffusion. Microneedle insertion disrupts skin integrity and compromises its protective function, thus creating pathways (microchannels) for enhanced permeation of macromolecules. Microneedles not only improve stability but also enhance skin delivery of various biomolecules. Academic institutions and industrial companies have invested substantial resources in the development of microneedle systems for biopharmaceutical delivery. This review article summarizes the most recent research to provide a comprehensive discussion about microneedle-mediated delivery of macromolecules, covering various topics from the introduction of the skin, transdermal delivery, microneedles, and biopharmaceuticals (current status, conventional administration, and stability issues), to different microneedle types, clinical trials, safety and acceptability of microneedles, manufacturing and regulatory issues, and the future of microneedle technology.
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Affiliation(s)
- Hiep X. Nguyen
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
- Correspondence: ; Tel.: +1-404-820-4015
| | - Chien N. Nguyen
- National Institute of Pharmaceutical Technology, Hanoi University of Pharmacy, Hanoi 100000, Vietnam
- Faculty of Pharmaceutics and Pharmaceutical Technology, Hanoi University of Pharmacy, Hanoi 100000, Vietnam
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Chen J, Ren H, Zhou P, Zheng S, Du B, Liu X, Xiao F. Microneedle-mediated drug delivery for cutaneous diseases. Front Bioeng Biotechnol 2022; 10:1032041. [PMID: 36324904 PMCID: PMC9618658 DOI: 10.3389/fbioe.2022.1032041] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 10/05/2022] [Indexed: 11/13/2022] Open
Abstract
Microneedles have garnered significant interest as transdermal drug delivery route owing to the advantages of nonselective loading capacity, minimal invasiveness, simple operation, and good biocompatibility. A number of therapeutics can be loaded into microneedles, including hydrophilic and hydrophobic small molecular drugs, and macromolecular drugs (proteins, mRNA, peptides, vaccines) for treatment of miscellaneous diseases. Microneedles feature with special benefits for cutaneous diseases owing to the direct transdermal delivery of therapeutics to the skin. This review mainly introduces microneedles fabricated with different technologies and transdermal delivery of various therapeutics for cutaneous diseases, such as psoriasis, atopic dermatitis, skin and soft tissue infection, superficial tumors, axillary hyperhidrosis, and plantar warts.
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Affiliation(s)
- Jian Chen
- Clinical Translational Center for Targeted Drug, Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, China
| | - Hui Ren
- Clinical Translational Center for Targeted Drug, Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, China
| | - Pan Zhou
- Department of Orthopaedics, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Shuai Zheng
- Department of Orthopaedics, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China
| | - Bin Du
- Department of Pathology, Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
- *Correspondence: Bin Du, ; Xiaowen Liu, ; Fei Xiao,
| | - Xiaowen Liu
- Clinical Translational Center for Targeted Drug, Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, China
- *Correspondence: Bin Du, ; Xiaowen Liu, ; Fei Xiao,
| | - Fei Xiao
- Clinical Translational Center for Targeted Drug, Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, China
- *Correspondence: Bin Du, ; Xiaowen Liu, ; Fei Xiao,
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7
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Hu T, Zhang Z, Xu C. Transdermal delivery of dextran using conductive microneedles assisted by iontophoresis. J Mater Chem B 2022; 10:8075-8081. [PMID: 36124549 DOI: 10.1039/d2tb01049f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The combination of microneedles (MNs) and iontophoresis (ITP) can enhance the drug penetration in the skin. We previously demonstrated the enhanced delivery of small molecule lidocaine in dentistry by the conductive MNs assisted by ITP. However, the delivery of macromolecules is yet to be explored for this strategy. This study fabricates conductive MNs with polyaniline and hyaluronic acid, which is combined with ITP to deliver dextran macromolecules. This combination improves the penetration of dextran molecules (3-5 kDa, 150 kDa, and 500 kDa) to a depth of around 1536 μm in the agarose gel model. Compared to non-conductive MNs assisted by ITP or conductive MNs alone, conductive MNs assisted by ITP also improves dextran's penetration through the skin, fat, muscle, and cartilage.
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Affiliation(s)
- Tianli Hu
- Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
| | - Zhibiao Zhang
- Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
| | - Chenjie Xu
- Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
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Ebrahim H, Elardi A, Khater S, Morsi H. Successful Topical Application of Botulinum Toxin After Microneedling Versus Microneedling Alone for the Treatment of Atrophic Post Acne Scars: A Prospective, Split-face, Controlled Study. THE JOURNAL OF CLINICAL AND AESTHETIC DERMATOLOGY 2022; 15:26-31. [PMID: 35942010 PMCID: PMC9345194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
BACKGROUND Acne scars are a source of cosmetic concern for most of the patients. OBJECTIVE We sought to compare the clinical efficacy and safety of topical botulinum toxin A (BTX-A) application immediately after microneedling (Mn) versus Mn with saline in the treatment of atrophic acne scars. METHODS Forty patients with atrophic acne scars (rolling, boxcar, and mixed types) were enrolled in a split-face study; microneedling was performed on both sides of the face followed by an application of topically diluted botulinum toxin on one side (Side A) and saline on the other (Side B) for two sessions both two weeks apart. Evaluation was done at baseline, two and four weeks after the session. Follow-up was performed after six months. The assessments included blinded clinical assessment and patient's satisfaction. RESULTS After the treatment, acne scars in (Side A) showed 70 percent overall improvement versus zero percent in Side B (P<0.0001). A statistically highly significant reduction of acne scars severity occurred in (Side A) (P=0.0008). Patient's satisfaction was higher in (Side A) (P<0.0001). No serious side effects were reported. CONCLUSION Microneedling delivery of BTX-A could be simple, safe, and innovative modality improving the appearance and decrease the depth of atrophic acne scars.
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Affiliation(s)
- Howyda Ebrahim
- All authors are with Zagazig University Hostpital in Zagazig, Egypt
| | - Amal Elardi
- All authors are with Zagazig University Hostpital in Zagazig, Egypt
| | - Sayed Khater
- All authors are with Zagazig University Hostpital in Zagazig, Egypt
| | - Hala Morsi
- All authors are with Zagazig University Hostpital in Zagazig, Egypt
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Gera AK, Burra RK. The Rise of Polymeric Microneedles: Recent Developments, Advances, Challenges, and Applications with Regard to Transdermal Drug Delivery. J Funct Biomater 2022; 13:81. [PMID: 35735936 PMCID: PMC9224958 DOI: 10.3390/jfb13020081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/24/2022] [Accepted: 05/30/2022] [Indexed: 12/31/2022] Open
Abstract
The current scenario of the quest for microneedles (MNs) with biodegradability and biocompatibility properties is a potential research area of interest. Microneedles are considered to be robust, can penetrate the skin's deep-seated layers, and are easy to manufacture, and their applications from the clinical perspective are still ongoing with standard escalation. This review paper focuses on some of the pivotal variants of polymeric microneedles which are specifically dissolvable and swell-based MNs. It further explores the drug dissolution kinetics and insertion behavior mechanisms with an emphasis on the need for mathematical modeling of MNs. This review further evaluates the multifarious fabrication methods, with an update on the advances in the fabrication of polymeric MNs, the choice of materials used for the fabrication, the challenges in polymeric MN fabrication, and the prospects of polymeric MNs with applications pertinent to healthcare, by exclusively focusing on the procurable literature over the last decade.
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Affiliation(s)
- Aswani Kumar Gera
- Department of Electrical, Electronics & Communication Engineering, School of Technology, GITAM, Deemed to Be University, Visakhapatnam 530045, India;
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Commentary on Techniques to Relieve Pain Associated With Botulinum Injections for Palmar and Plantar Hyperhidrosis. Dermatol Surg 2021; 47:1572. [PMID: 34818272 DOI: 10.1097/dss.0000000000003258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Aich K, Singh T, Dang S. Advances in microneedle-based transdermal delivery for drugs and peptides. Drug Deliv Transl Res 2021; 12:1556-1568. [PMID: 34564827 DOI: 10.1007/s13346-021-01056-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2021] [Indexed: 12/15/2022]
Abstract
Transdermal drug delivery is a viable and clinically proven route of administration. This route specifically requires overcoming the mechanical barrier provided by the Stratum Corneum of epidermis and vascular and nervous networks within the dermis. First-generation Transdermal patches and second-generation iontophoretic patches have been translated into commercial clinical products successfully. The current review reports different studies that aim to enhance the transdermal delivery of biopharmaceutical using microneedles and their effect on drug delivery. Microneedles (MN) are the micron-scale hybrid between transdermal patches and hypodermic syringes. Microneedles are tested and proven to show better delivery of the drugs, overcoming the drawbacks of hypodermic syringes. Multiple microneedles designs have been fabricated i.e. solid, coated, hollow, and polymer microneedles. Hollow microneedles are shorter in length but similar to hypodermic needles and have pore for infusion of liquid formulation of the drug. Solid microneedles a patch is applied after creating a hole in the skin; Drugs are coated on the surface of Coated microneedles; Polymer microneedles can be of different types like dissolving, non-dissolving or hydrogel-forming made up of polymers. Various advantages and limitations associated with the use of these techniques are discussed. Delivery of peptide and protein molecules with microneedles represents a significant opportunity for a better clinical outcome and hence value creation compared to standard injectable routes of administration. The advancement in various formulation and microfabrication techniques are currently being focused to aid the delivery of protein drugs via microneedles. The most recent advances and limitations in Microneedles -mediated protein and peptide delivery were discussed.
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Affiliation(s)
- Krishanu Aich
- Department of Biotechnology, Jaypee Institute of Information Technology, Noida, Uttar Pradesh, India
| | - Tanya Singh
- Department of Biotechnology, Jaypee Institute of Information Technology, Noida, Uttar Pradesh, India
| | - Shweta Dang
- Department of Biotechnology, Jaypee Institute of Information Technology, Noida, Uttar Pradesh, India.
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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: 4] [Impact Index Per Article: 1.3] [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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13
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Yadav PR, Munni MN, Campbell L, Mostofa G, Dobson L, Shittu M, Pattanayek SK, Uddin MJ, Das DB. Translation of Polymeric Microneedles for Treatment of Human Diseases: Recent Trends, Progress, and Challenges. Pharmaceutics 2021; 13:1132. [PMID: 34452093 PMCID: PMC8401662 DOI: 10.3390/pharmaceutics13081132] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/17/2021] [Accepted: 07/20/2021] [Indexed: 12/14/2022] Open
Abstract
The ongoing search for biodegradable and biocompatible microneedles (MNs) that are strong enough to penetrate skin barriers, easy to prepare, and can be translated for clinical use continues. As such, this review paper is focused upon discussing the key points (e.g., choice polymeric MNs) for the translation of MNs from laboratory to clinical practice. The review reveals that polymers are most appropriately used for dissolvable and swellable MNs due to their wide range of tunable properties and that natural polymers are an ideal material choice as they structurally mimic native cellular environments. It has also been concluded that natural and synthetic polymer combinations are useful as polymers usually lack mechanical strength, stability, or other desired properties for the fabrication and insertion of MNs. This review evaluates fabrication methods and materials choice, disease and health conditions, clinical challenges, and the future of MNs in public healthcare services, focusing on literature from the last decade.
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Affiliation(s)
- Prateek Ranjan Yadav
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, UK; (P.R.Y.); (L.C.); (L.D.); (M.S.)
- Chemical Engineering Department, Indian Institute of Technology, Delhi 110016, India;
| | | | - Lauryn Campbell
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, UK; (P.R.Y.); (L.C.); (L.D.); (M.S.)
| | - Golam Mostofa
- Drug Delivery & Therapeutics Lab, Dhaka 1212, Bangladesh; (M.N.M.); (G.M.)
| | - Lewis Dobson
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, UK; (P.R.Y.); (L.C.); (L.D.); (M.S.)
| | - Morayo Shittu
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, UK; (P.R.Y.); (L.C.); (L.D.); (M.S.)
| | | | - Md. Jasim Uddin
- Drug Delivery & Therapeutics Lab, Dhaka 1212, Bangladesh; (M.N.M.); (G.M.)
- Department of Pharmacy, Brac University, 66 Mohakhali, Dhaka 1212, Bangladesh
| | - Diganta Bhusan Das
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, UK; (P.R.Y.); (L.C.); (L.D.); (M.S.)
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14
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Microneedle Mediated Transdermal Delivery of Protein, Peptide and Antibody Based Therapeutics: Current Status and Future Considerations. Pharm Res 2020; 37:117. [PMID: 32488611 PMCID: PMC7266419 DOI: 10.1007/s11095-020-02844-6] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 05/21/2020] [Indexed: 02/08/2023]
Abstract
The success of protein, peptide and antibody based therapies is evident - the biopharmaceuticals market is predicted to reach $388 billion by 2024 [1], and more than half of the current top 20 blockbuster drugs are biopharmaceuticals. However, the intrinsic properties of biopharmaceuticals has restricted the routes available for successful drug delivery. While providing 100% bioavailability, the intravenous route is often associated with pain and needle phobia from a patient perspective, which may translate as a reluctance to receive necessary treatment. Several non-invasive strategies have since emerged to overcome these limitations. One such strategy involves the use of microneedles (MNs), which are able to painlessly penetrate the stratum corneum barrier to dramatically increase transdermal drug delivery of numerous drugs. This review reports the wealth of studies that aim to enhance transdermal delivery of biopharmaceutics using MNs. The true potential of MNs as a drug delivery device for biopharmaceuticals will not only rely on acceptance from prescribers, patients and the regulatory authorities, but the ability to upscale MN manufacture in a cost-effective manner and the long term safety of MN application. Thus, the current barriers to clinical translation of MNs, and how these barriers may be overcome are also discussed.
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Targeting proinsulin to local immune cells using an intradermal microneedle delivery system; a potential antigen-specific immunotherapy for type 1 diabetes. J Control Release 2020; 322:593-601. [DOI: 10.1016/j.jconrel.2020.02.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/28/2020] [Accepted: 02/17/2020] [Indexed: 12/18/2022]
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Bhattaccharjee S, Beck-Broichsitter M, Banga AK. In Situ Gel Formation in Microporated Skin for Enhanced Topical Delivery of Niacinamide. Pharmaceutics 2020; 12:pharmaceutics12050472. [PMID: 32455797 PMCID: PMC7284857 DOI: 10.3390/pharmaceutics12050472] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 05/15/2020] [Accepted: 05/15/2020] [Indexed: 02/04/2023] Open
Abstract
Although used widely in cosmetic formulations, topical delivery of niacinamide (LogP = -0.35) is unfavorable by conventional means. Poly(lactide-co-glycolide) (PLGA) formulations, can undergo a sol-gel transition triggered by solvent exchange, entrapping molecules and sustaining their release. The current study aims to exploit the ability of PLGA to gel in situ and enhance the topical delivery of niacinamide in microporated skin. In vitro drug permeation studies were performed using vertical Franz diffusion cells. Microporation was performed using Dr. PenTM Ultima A6, where pre-treatment with a 1 mm needle-length for 10 s and a 0.5 mm needle-length for 5 s, both at 13,000 insertions/min were compared. The effect of different grades of PLGA, EXPANSORB® DLG 50-2A ("low" molecular weight), and EXPANSORB® DLG 50-8A ("high" molecular weight) on topical delivery was also determined. Formulations containing PLGA resulted in successful gelation in situ on application over microporated skin. A significantly higher amount of drug was found in the skin with the 0.5 mm treatment for 5 s (892 ± 36 µg/cm2) than with 1 mm for 10 s (167 ± 16 µg/cm2). Hence, the different grades of PLGA were evaluated with 0.5 mm, 5 s treatment, and a significantly larger amount was seen in skin with the higher rather than the lower molecular weight polymer (172 ± 53 µg/cm2).
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Affiliation(s)
- Sonalika Bhattaccharjee
- Center for Drug Delivery and Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA;
| | | | - Ajay K. Banga
- Center for Drug Delivery and Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA;
- Correspondence:
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Liang L, Chen Y, Zhang BL, Zhang XP, Liu JL, Shen CB, Cui Y, Guo XD. Optimization of dip-coating methods for the fabrication of coated microneedles for drug delivery. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2019.101464] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Nawrocki S, Cha J. Botulinum toxin: Pharmacology and injectable administration for the treatment of primary hyperhidrosis. J Am Acad Dermatol 2019; 82:969-979. [PMID: 31811879 DOI: 10.1016/j.jaad.2019.11.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 11/15/2019] [Accepted: 11/22/2019] [Indexed: 01/17/2023]
Abstract
Hyperhidrosis is a dermatological condition defined by excessive sweating beyond thermoregulatory needs with significant effects on patients' quality of life. Hyperhidrosis is categorized as primary or secondary: primary hyperhidrosis is mostly focal and idiopathic, whereas secondary hyperhidrosis is commonly generalized and caused by an underlying medical condition or use of medications. Various surgical and nonsurgical therapies exist for primary hyperhidrosis. Although botulinum toxin is one of the deadliest toxins known, when used in small doses, it is one of the most effective therapies for primary hyperhidrosis. Botulinum toxin injections are widely used as a second-line primary hyperhidrosis treatment option once topical treatment strategies have failed. This article provides an overview of the commercially available botulinum toxin formulations and their applications in the treatment of primary hyperhidrosis.
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Affiliation(s)
- Shiri Nawrocki
- Rutgers-Robert Wood Johnson Medical School, Department of Dermatology, Piscataway, New Jersey.
| | - Jisun Cha
- Thomas Jefferson University, Department of Dermatology, Philadelphia, Pennsylvania
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Shim DH, Nguyen TT, Park PG, Kim MJ, Park BW, Jeong HR, Kim DS, Joo HW, Choi SO, Park JH, Lee JM. Development of Botulinum Toxin A-Coated Microneedles for Treating Palmar Hyperhidrosis. Mol Pharm 2019; 16:4913-4919. [DOI: 10.1021/acs.molpharmaceut.9b00794] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
| | - Thuy Trang Nguyen
- Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | | | | | | | - Hye-Rin Jeong
- Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | - Dae-Sung Kim
- Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | - Hyun Woo Joo
- Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University, Gyeonggi-do 13120, Republic of Korea
| | - Seong-O Choi
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas 66506, United States
| | - Jung-Hwan Park
- Department of BioNano Technology and Gachon BioNano Research Institute, Gachon University, Gyeonggi-do 13120, Republic of Korea
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Cheng H, Liu M, Du X, Xu J, Zhai Y, Ji J, He S, Zhai G. Recent progress of micro-needle formulations: Fabrication strategies and delivery applications. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.01.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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21
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The etiology, diagnosis, and management of hyperhidrosis: A comprehensive review: Therapeutic options. J Am Acad Dermatol 2019; 81:669-680. [PMID: 30710603 DOI: 10.1016/j.jaad.2018.11.066] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 11/11/2018] [Accepted: 11/14/2018] [Indexed: 11/21/2022]
Abstract
Hyperhidrosis (HH) is a chronic disorder of excess sweat production that may have a significant adverse effect on quality of life. A variety of treatment modalities currently exist to manage HH. Initial treatment includes lifestyle and behavioral recommendations. Antiperspirants are regarded as the first-line therapy for primary focal HH and can provide significant benefit. Iontophoresis is the primary remedy for palmar and plantar HH. Botulinum toxin injections are administered at the dermal-subcutaneous junction and serve as a safe and effective treatment option for focal HH. Oral systemic agents are reserved for treatment-resistant cases or for generalized HH. Energy-delivering devices such as lasers, ultrasound technology, microwave thermolysis, and fractional microneedle radiofrequency may also be utilized to reduce focal sweating. Surgery may be considered when more conservative treatments have failed. Local surgical techniques, particularly for axillary HH, include excision, curettage, liposuction, or a combination of these techniques. Sympathectomy is the treatment of last resort when conservative treatments are unsuccessful or intolerable, and after accepting secondary compensatory HH as a potential complication. A review of treatment modalities for HH and a sequenced approach are presented.
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Kwolek MS, Block JE. Maximizing botulinum toxin injections for cosmetic and therapeutic applications with a single use, disposable, exact dose injection assist device. Clin Cosmet Investig Dermatol 2019; 12:35-46. [PMID: 30662278 PMCID: PMC6327894 DOI: 10.2147/ccid.s189595] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Background Although freehand injection of botulinum toxin remains the status quo, it is an inaccurate technique for delivering precise amounts of neurotoxin at multiple injection sites with expediency. We developed an inexpensive, ergonomic, single-use, disposable exostructure device that rapidly converts a standard syringe into a highly accurate injection instrument. Materials and methods Based on the results of two independent injectors, we determined the comparative delivery dose accuracy, precision, and amount of product waste associated with a standard syringe using the freehand injection technique vs a prototype injection assist device. Fifteen experienced injectors were also surveyed regarding their satisfaction using the device in a controlled research setting. Results The average percentage difference from the expected dose value was <1% (0.00024 mL) for 1-unit doses (ie, 0.025 mL) with the injection assist device. In contrast, accuracy values with the freehand method were more than 10 times worse (ie, >10% or 0.0025 mL). Accuracy estimates were also superior with the device over freehand for 2- and 4-unit doses. Precision estimates favored the device for all comparisons and all dosing regimens. The magnitude of variability around the average difference ranged from 2.2 to 5.4 times worse for the freehand method compared to the device. The overall percentage of product waste was substantial with the freehand method (>10%) compared to the device (4.3%) (P=0.04) for 1-unit injections. The percentage of injections showing measurable product waste was also significantly lower with the device (78% vs 25%, P=0.01). Fourteen of 15 (93%) injectors surveyed would use the device in daily practice if it were included complimentary with the neurotoxin. Conclusion The injection assist device offered superior accuracy and precision compared to the freehand method across the entire injection regimen. The ancillary finding of a significant reduction in product waste with the device was particularly notable.
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Affiliation(s)
| | - Jon E Block
- Independent Clinical Consultant, San Francisco, CA 94115, USA,
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Richter-Johnson J, Kumar P, Choonara YE, du Toit LC, Pillay V. Therapeutic applications and pharmacoeconomics of microneedle technology. Expert Rev Pharmacoecon Outcomes Res 2018; 18:359-369. [PMID: 29889571 DOI: 10.1080/14737167.2018.1485100] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
INTRODUCTION Microneedle (MN) arrays contain a backing plate with multiple microscopic projections to puncture the skin and can be used to deliver drug in a minimally invasive way. Advantages of MNs are numerous including administration of large molecules, avoiding first-pass metabolism, ease of administration, lack of pain, site-specific drug targeting, and dose reduction due to increased absorption efficacy. The growth in the transdermal market has been fueled by an increasing number of chronic disease patients and a demand for easy and pain-free drug administration. AREAS COVERED This paper highlights the use of MNs as a drug delivery system and discusses their potential market impact from a cost perspective. A number of clinical trials have been conducted and are listed to illustrate the potential applications of MNs for therapeutic use. Furthermore, the cosmetic market has made use of the MN technology, indicating that MNs can be used safely, efficaciously, and on a commercial scale. Furthermore, the cost-effectiveness of MNs is discussed. EXPERT COMMENTARY For MNs to become commercially available for therapeutic use, a number of factors will need to be considered: safety, ease of use, manufacturing and storage, uptake, effectiveness, and regulatory requirements.
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Affiliation(s)
- Jolanda Richter-Johnson
- a Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics Sciences , Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
| | - Pradeep Kumar
- a Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics Sciences , Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
| | - Yahya E Choonara
- a Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics Sciences , Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
| | - Lisa C du Toit
- a Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics Sciences , Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
| | - Viness Pillay
- a Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutics Sciences , Faculty of Health Sciences, University of the Witwatersrand , Johannesburg , South Africa
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Fonfria E, Maignel J, Lezmi S, Martin V, Splevins A, Shubber S, Kalinichev M, Foster K, Picaut P, Krupp J. The Expanding Therapeutic Utility of Botulinum Neurotoxins. Toxins (Basel) 2018; 10:E208. [PMID: 29783676 PMCID: PMC5983264 DOI: 10.3390/toxins10050208] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 05/15/2018] [Accepted: 05/16/2018] [Indexed: 12/11/2022] Open
Abstract
Botulinum neurotoxin (BoNT) is a major therapeutic agent that is licensed in neurological indications, such as dystonia and spasticity. The BoNT family, which is produced in nature by clostridial bacteria, comprises several pharmacologically distinct proteins with distinct properties. In this review, we present an overview of the current therapeutic landscape and explore the diversity of BoNT proteins as future therapeutics. In recent years, novel indications have emerged in the fields of pain, migraine, overactive bladder, osteoarthritis, and wound healing. The study of biological effects distal to the injection site could provide future opportunities for disease-tailored BoNT therapies. However, there are some challenges in the pharmaceutical development of BoNTs, such as liquid and slow-release BoNT formulations; and, transdermal, transurothelial, and transepithelial delivery. Innovative approaches in the areas of formulation and delivery, together with highly sensitive analytical tools, will be key for the success of next generation BoNT clinical products.
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Affiliation(s)
- Elena Fonfria
- Ipsen Bioinnovation, 102 Park Drive, Milton Park, Abingdon, Oxfordshire OX14 4RY, UK.
| | - Jacquie Maignel
- Ipsen Innovation, 5 Avenue du Canada, 91940 Les Ulis, France.
| | - Stephane Lezmi
- Ipsen Innovation, 5 Avenue du Canada, 91940 Les Ulis, France.
| | - Vincent Martin
- Ipsen Innovation, 5 Avenue du Canada, 91940 Les Ulis, France.
| | - Andrew Splevins
- Ipsen Bioinnovation, 102 Park Drive, Milton Park, Abingdon, Oxfordshire OX14 4RY, UK.
| | - Saif Shubber
- Ipsen Biopharm Ltd., Wrexham Industrial Estate, 9 Ash Road, Wrexham LL13 9UF, UK.
| | | | - Keith Foster
- Ipsen Bioinnovation, 102 Park Drive, Milton Park, Abingdon, Oxfordshire OX14 4RY, UK.
| | - Philippe Picaut
- Ipsen Bioscience, 650 Kendall Street, Cambridge, MA 02142, USA.
| | - Johannes Krupp
- Ipsen Innovation, 5 Avenue du Canada, 91940 Les Ulis, France.
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Microneedles as the technique of drug delivery enhancement in diverse organs and tissues. J Control Release 2018; 270:184-202. [DOI: 10.1016/j.jconrel.2017.11.048] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/22/2017] [Accepted: 11/29/2017] [Indexed: 11/24/2022]
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26
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Tarbox TN, Watts AB, Cui Z, Williams RO. An update on coating/manufacturing techniques of microneedles. Drug Deliv Transl Res 2017; 8:1828-1843. [DOI: 10.1007/s13346-017-0466-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Zhao X, Coulman SA, Hanna SJ, Wong FS, Dayan CM, Birchall JC. Formulation of hydrophobic peptides for skin delivery via coated microneedles. J Control Release 2017; 265:2-13. [DOI: 10.1016/j.jconrel.2017.03.015] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 03/07/2017] [Indexed: 12/18/2022]
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Affiliation(s)
- Jason E. Sammons
- Department of Clinical Medicine, Avalon University School of Medicine, Willemstad, CW, USA
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Microfabrication for Drug Delivery. MATERIALS 2016; 9:ma9080646. [PMID: 28773770 PMCID: PMC5509096 DOI: 10.3390/ma9080646] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 07/14/2016] [Accepted: 07/26/2016] [Indexed: 12/22/2022]
Abstract
This review is devoted to discussing the application of microfabrication technologies to target challenges encountered in life processes by the development of drug delivery systems. Recently, microfabrication has been largely applied to solve health and pharmaceutical science issues. In particular, fabrication methods along with compatible materials have been successfully designed to produce multifunctional, highly effective drug delivery systems. Microfabrication offers unique tools that can tackle problems in this field, such as ease of mass production with high quality control and low cost, complexity of architecture design and a broad range of materials. Presented is an overview of silicon- and polymer-based fabrication methods that are key in the production of microfabricated drug delivery systems. Moreover, the efforts focused on studying the biocompatibility of materials used in microfabrication are analyzed. Finally, this review discusses representative ways microfabrication has been employed to develop systems delivering drugs through the transdermal and oral route, and to improve drug eluting implants. Additionally, microfabricated vaccine delivery systems are presented due to the great impact they can have in obtaining a cold chain-free vaccine, with long-term stability. Microfabrication will continue to offer new, alternative solutions for the development of smart, advanced drug delivery systems.
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Baker D. Topical glycopyrrolate reduces axillary hyperhidrosis. J Eur Acad Dermatol Venereol 2016; 30:2131-2136. [DOI: 10.1111/jdv.13745] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Accepted: 03/16/2016] [Indexed: 11/28/2022]
Affiliation(s)
- D.M. Baker
- Department of Surgery; Royal Free Hospital; London UK
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31
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Jeong HR, Lee HS, Choi IJ, Park JH. Considerations in the use of microneedles: pain, convenience, anxiety and safety. J Drug Target 2016; 25:29-40. [DOI: 10.1080/1061186x.2016.1200589] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Puri A, Nguyen HX, Banga AK. Microneedle-mediated intradermal delivery of epigallocatechin-3-gallate. Int J Cosmet Sci 2016; 38:512-23. [DOI: 10.1111/ics.12320] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 03/20/2016] [Indexed: 01/09/2023]
Affiliation(s)
- A. Puri
- Department of Pharmaceutical Sciences; College of Pharmacy; Mercer University; Atlanta GA 30341 USA
| | - H. X. Nguyen
- Department of Pharmaceutical Sciences; College of Pharmacy; Mercer University; Atlanta GA 30341 USA
| | - A. K. Banga
- Department of Pharmaceutical Sciences; College of Pharmacy; Mercer University; Atlanta GA 30341 USA
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Chen MC, Lin ZW, Ling MH. Near-Infrared Light-Activatable Microneedle System for Treating Superficial Tumors by Combination of Chemotherapy and Photothermal Therapy. ACS NANO 2016; 10:93-101. [PMID: 26592739 DOI: 10.1021/acsnano.5b05043] [Citation(s) in RCA: 220] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Because of the aggressive and recurrent nature of cancers, repeated and multimodal treatments are often necessary. Traditional cancer therapies have a risk of serious toxicity and side effects. Hence, it is crucial to develop an alternative treatment modality that is minimally invasive, effectively treats cancers with low toxicity, and can be repeated as required. We developed a light-activatable microneedle (MN) system that can repeatedly and simultaneously provide photothermal therapy and chemotherapy to superficial tumors and exert synergistic anticancer effects. This system consists of embeddable polycaprolactone MNs containing a photosensitive nanomaterial (lanthanum hexaboride) and an anticancer drug (doxorubicin; DOX), and a dissolvable poly(vinyl alcohol)/polyvinylpyrrolidone supporting array patch. Because of this supporting array, the MNs can be completely inserted into the skin and embedded within the target tissue for locoregional cancer treatment. When exposed to near-infrared light, the embedded MN array uniformly heats the target tissue to induce a large thermal ablation area and then melts at 50 °C to release DOX in a broad area, thus destroying tumors. This light-activated heating and releasing behavior can be precisely controlled and switched on and off on demand for several cycles. We demonstrated that the MN-mediated synergistic therapy completely eradicated 4T1 tumors within 1 week after a single application of the MN and three cycles of laser treatment. No tumor recurrence and no significant body weight loss of mice were observed. Thus, the developed light-activatable MN with a unique embeddable feature offers an effective, user-friendly, and low-toxicity option for patients requiring long-term and multiple cancer treatments.
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Affiliation(s)
- Mei-Chin Chen
- Department of Chemical Engineering, National Cheng Kung University , Tainan, Taiwan 70101
| | - Zhi-Wei Lin
- Department of Chemical Engineering, National Cheng Kung University , Tainan, Taiwan 70101
| | - Ming-Hung Ling
- Department of Chemical Engineering, National Cheng Kung University , Tainan, Taiwan 70101
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Microneedle patches for vaccination in developing countries. J Control Release 2015; 240:135-141. [PMID: 26603347 DOI: 10.1016/j.jconrel.2015.11.019] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 10/31/2015] [Accepted: 11/17/2015] [Indexed: 12/17/2022]
Abstract
Millions of people die of infectious diseases each year, mostly in developing countries, which could largely be prevented by the use of vaccines. While immunization rates have risen since the introduction of the Expanded Program on Immunization (EPI), there remain major challenges to more effective vaccination in developing countries. As a possible solution, microneedle patches containing an array of micron-sized needles on an adhesive backing have been developed to be used for vaccine delivery to the skin. These microneedle patches can be easily and painlessly applied by pressing against the skin and, in some designs, do not leave behind sharps waste. The patches are single-dose, do not require reconstitution, are easy to administer, have reduced size to simplify storage, transportation and waste disposal, and offer the possibility of improved vaccine immunogenicity, dose sparing and thermostability. This review summarizes vaccination challenges in developing countries and discusses advantages that microneedle patches offer for vaccination to address these challenges. We conclude that microneedle patches offer a powerful new technology that can enable more effective vaccination in developing countries.
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Abstract
Active transdermal technology, commonly associated with drug delivery, has been used in recent years by the cosmetic industry for the aesthetic restoration of skin and delivery of cosmetic agents. In this article, we provide an overview of the skin's structure, various skin types, skin's self-repair mechanisms that are stimulated from the usage of cosmetic devices and discuss cosmetic applications. Summaries of the most common active transdermal technologies such as microneedles, iontophoresis, sonophoresis, lasers and microdermabrasion will be provided, in relation to the marketed cosmetic devices available that incorporate these technologies. Lastly, we cover combinations of active technologies that allow for more enhanced cosmetic results, and the current limitations of cosmetic devices.
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Singh S, Davis H, Wilson P. Axillary hyperhidrosis: A review of the extent of the problem and treatment modalities. Surgeon 2015; 13:279-85. [PMID: 25921800 DOI: 10.1016/j.surge.2015.03.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Revised: 10/24/2014] [Accepted: 03/24/2015] [Indexed: 12/09/2022]
Abstract
BACKGROUND The purpose of this review is to summarize the extent of the problem of axillary hyperhidrosis and treatment modalities available. The benefits and disadvantages of various treatments are reflected on with the hope of providing a starting point to investigate new ways of treating hyperhidrosis. MATERIAL & METHODS A literature search was conducted using various databases and search criteria. RESULTS Current treatments include aluminium chloride antiperspirants, iontophoresis, botox injections and endoscopic thoracic sympathectomy. Botox therapy is usually the most effective treatment, without surgery or unpleasant side effects. However it has to be administered by a skilled clinician and involves around 20 injections to treat axillary hyperhidrosis. Other ways of giving Botox are being developed, the most promising one being the use of microneedles which are able to penetrate the skin and deliver drugs to the target area of the dermis without causing pain. In comparison to the temporary effects of microneedles, laser and microwave therapies are also assessed as they offer the hope of permanent relief from hyperhidrosis. CONCLUSION There is a considerable dearth in the literature on the management of axillary hyperhidrosis. Further study in larger populations with longer follow up times is critical to access the long term effects of treatment. Microneedles could be the future treatment of choice with the potential to deliver drugs in a safe and pain free way.
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Affiliation(s)
- Sanjay Singh
- Department of Vascular Surgery, Royal Lancaster Infirmary, Lancaster, LA1 4RP, UK.
| | - Harriet Davis
- Department of Vascular Surgery, Royal Lancaster Infirmary, Lancaster, LA1 4RP, UK
| | - Paul Wilson
- Department of Vascular Surgery, Royal Lancaster Infirmary, Lancaster, LA1 4RP, UK
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Lezanski-Gujda A, Bingham JL, Logemann NF. Botulinum toxin: An effective treatment for prosthesis-related hyperhidrosis in patients with traumatic amputations. Indian Dermatol Online J 2015; 6:1-3. [PMID: 25657907 PMCID: PMC4314879 DOI: 10.4103/2229-5178.148906] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Hyperhidrosis-related to prosthesis use in patients who have suffered a traumatic limb amputation presents itself as a barrier to comfort, prosthesis use and overall quality of life. This review intends to encourage dermatologists to consider the use of botulinum toxin A or B for the treatment of hyperhidrosis in the residual limb and may serve as a stimulus for a modern, in-depth, and more comprehensive study. A review of the literature was conducted using the PubMed database, focusing on hyperhidrosis treatment after traumatic limb amputation. Articles discussing hyperhidrosis treatment for amputations secondary to chronic medical conditions were excluded. Seven case studies published over the last 12 years have demonstrated positive outcomes of this treatment strategy. Overall, there is little data examining this topic and current publications focus primarily on small case series. A larger, double-blind, placebo-controlled study would likely benefit veterans, service members, and civilians.
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Affiliation(s)
- Amanda Lezanski-Gujda
- Department of Dermatology, Walter Reed National Military Medical Center, Bethesda, Maryland, USA
| | - Jonathan L Bingham
- Department of Dermatology, Walter Reed National Military Medical Center, Bethesda, Maryland, USA
| | - Nicholas F Logemann
- Department of Dermatology, Walter Reed National Military Medical Center, Bethesda, Maryland, USA
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Affiliation(s)
- Karmen Cheung
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, UK
| | - Diganta B. Das
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire, UK
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Weinberg T, Solish N, Murray C. Botulinum Neurotoxin Treatment of Palmar and Plantar Hyperhidrosis. Dermatol Clin 2014; 32:505-15. [DOI: 10.1016/j.det.2014.06.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Raphael AP, Primiero CA, Ansaldo AB, Keates HL, Soyer HP, Prow TW. Elongate microparticles for enhanced drug delivery to ex vivo and in vivo pig skin. J Control Release 2013; 172:96-104. [PMID: 23933236 DOI: 10.1016/j.jconrel.2013.07.025] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 06/21/2013] [Accepted: 07/30/2013] [Indexed: 11/17/2022]
Abstract
The delivery of therapeutics and cosmaceuticals into and/or through the skin is hindered by epidermal barriers. To overcome the skin's barriers we have developed a novel cutaneous delivery method using high aspect ratio elongate microparticles (EMPs). Using ex vivo and in vivo pig skin we assess the penetration and delivery characteristics of the elongate microparticles. With reflectance confocal microscopy we observed that the elongate microparticles successfully penetrated the epidermis and upper dermis. Delivery was then assessed using two different length populations of EMPs, comparing their delivery profile to topical alone using sodium fluorescein and confocal microscopy. We observed a relatively uniform and continuous delivery profile in the EMP treated area within the upper layers of the skin--up to seven times greater than topical alone. Finally, we delivered two therapeutically relevant compounds (Vitamins A and B3), showing enhanced delivery using the EMPs. To our knowledge this is the first report using high aspect ratio elongate microparticles in this manner for enhanced topical delivery to the skin.
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Affiliation(s)
- Anthony P Raphael
- Dermatology Research Centre, School of Medicine, The University of Queensland, Princess Alexandra Hospital, Translational Research Institute, Brisbane 4102, QLD, Australia
| | - Clare A Primiero
- Dermatology Research Centre, School of Medicine, The University of Queensland, Princess Alexandra Hospital, Translational Research Institute, Brisbane 4102, QLD, Australia
| | - Alexander B Ansaldo
- Dermatology Research Centre, School of Medicine, The University of Queensland, Princess Alexandra Hospital, Translational Research Institute, Brisbane 4102, QLD, Australia
| | - Helen L Keates
- School of Veterinary Science, The University of Queensland, Gatton Campus, Gatton 4343, QLD, Australia
| | - H Peter Soyer
- Dermatology Research Centre, School of Medicine, The University of Queensland, Princess Alexandra Hospital, Translational Research Institute, Brisbane 4102, QLD, Australia
| | - Tarl W Prow
- Dermatology Research Centre, School of Medicine, The University of Queensland, Princess Alexandra Hospital, Translational Research Institute, Brisbane 4102, QLD, Australia.
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