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Letsiou S. Tracing skin aging process: a mini- review of in vitro approaches. Biogerontology 2021; 22:261-272. [PMID: 33721158 DOI: 10.1007/s10522-021-09916-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 03/04/2021] [Indexed: 12/25/2022]
Abstract
Skin is a rather complex, yet useful organ of our body. Besides, skin aging is a complicated process that gains a growing interest as mediates many molecular processes in our body. Thus, an efficient skin model is important to understand skin aging function as well as to develop an effective innovative product for skin aging treatment. In this mini review, we present in vitro methods for assessments of skin aging in an attempt to pinpoint basic molecular mechanisms behind this process achieving both a better understanding of aging function and an effective evaluation of potential products or ingredients that counteract aging. Specifically, this study presents in vitro assays such as 2D or 3D skin models, to evaluate skin aging-related processes such as skin moisturization, photoaging, wound healing, menopause, and skin microbiome as novel efforts in the designing of efficacy assessments in the development of skincare products.
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Affiliation(s)
- Sophia Letsiou
- Laboratory of Biochemistry, Research and Development Department, APIVITA S.A., Industrial Park of Markopoulo Mesogaias, Markopoulo Attiki, 19003, Athens, Greece.
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52
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Han X, Li H, Zhou D, Chen Z, Gu Z. Local and Targeted Delivery of Immune Checkpoint Blockade Therapeutics. Acc Chem Res 2020; 53:2521-2533. [PMID: 33073988 DOI: 10.1021/acs.accounts.0c00339] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Immune checkpoint blockade (ICB) therapy elicits antitumor response by inhibiting immune suppressor components, including programmed cell death protein 1 and its ligand (PD-1/PD-L1) and cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4). Despite improved therapeutic efficacy, the clinical response rate is still unsatisfactory as revealed by the fact that only a minority of patients experience durable benefits. Additionally, "off-target" effects after systemic administration remain challenging for ICB treatment. To this end, the local and targeted delivery of ICB agents instead could be a potential solution to maximize the therapeutic outcomes while minimizing the side effects.In this Account, our recent studies directed at the development of different strategies for the local and targeted delivery of ICB agents are discussed. For example, transdermal microneedle patches loaded with anti-programmed death-1 antibody (aPD1) and anti-CTLA4 were developed to facilitate sustained release of ICB agents at the diseased sites. Triggered release could also be achieved by various stimuli within the tumor microenvironment, including low pH and abnormally expressed enzymes. Recently, the combination of an anti-programmed death-ligand 1 antibody (aPD-L1) loaded hollow-structured microneedle patch with cold atmospheric plasma (CAP) therapy was also reported. Microneedles provided microchannels to facilitate the transdermal transport of CAP and further induce immunogenic tumor cell death, which could be synergized by the local release of aPD-L1. In addition, in situ formed injectable or sprayable hydrogels were tailored to deliver immunomodulatory antibodies to the surgical bed to inhibit tumor recurrence after primary tumor resection. In paralell, inspired by the unique targeting ability of platelets toward the inflammatory sites, we engineered natural platelets decorated with aPD-L1 for targeted delivery after tumor resection to inhibit tumor recurrence. We further constructed a cell-cell combination delivery platform based on conjugates of platelets and hematopoietic stem cells (HSCs) for leukemia treatment. With the homing ability of HSCs to the bone marrow, the HSC-platelet-aPD1 assembly could effectively deliver aPD1 in an acute myeloid leukemia mouse model. Besides living cells, we also leveraged HEK293T-derived vesicles with PD1 receptors on their surfaces to disrupt the PD-1/PD-L1 immune inhibitory pathway. Moreover, the inner space of the vesicles allowed the packaging of an indoleamine 2,3-dioxygenase inhibitor, further reinforcing the therapeutic efficacy. A similar approach has also been demonstrated by genetically engineering platelets overexpressing PD1 receptor for postsurgical treatment. We hope the local and targeted ICB agent delivery methods introduced in this collection would further inspire the development of advanced drug delivery strategies to improve the efficiency of cancer treatment while alleviating side effects.
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Affiliation(s)
- Xiao Han
- Department of Bioengineering, University of California, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, California 90095, United States
| | - Hongjun Li
- Department of Bioengineering, University of California, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, California 90095, United States
| | - Daojia Zhou
- Department of Bioengineering, University of California, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, California 90095, United States
| | - Zhaowei Chen
- Department of Bioengineering, University of California, Los Angeles, California 90095, United States
- Institute of Food Safety and Environment Monitoring, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China
| | - Zhen Gu
- Department of Bioengineering, University of California, Los Angeles, California 90095, United States
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, California 90095, United States
- Center for Minimally Invasive Therapeutics, University of California, Los Angeles, California 90095, United States
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, P. R. China
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53
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Siafaka PI, Bülbül EÖ, Mutlu G, Okur ME, Karantas ID, Okur NÜ. Transdermal Drug Delivery Systems and their Potential in Alzheimer’s Disease Management. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2020; 19:360-373. [DOI: 10.2174/1871527319666200618150046] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 05/18/2020] [Accepted: 05/19/2020] [Indexed: 02/06/2023]
Abstract
Alzheimer's disease is a neuropathological disease with symptoms such as language problems,
confusion as to place or time, loss of interest in activities, which were previously enjoyed, behavioral
changes, and memory loss. Alzheimer's disease and other types of dementia affect almost
46.8 million people globally and are estimated to strike about 131.5 million people in 2050. It has been
reported that Alzheimer's is the sixth main cause of mortality. The most used drugs, which are currently
approved by the Food, and Drug Administration for Alzheimer’s disease are donepezil, rivastigmine,
galantamine, memantine, and the combination of donepezil and memantine. However, most of
the drugs present various adverse effects. Recently, the transdermal drug delivery route has gained increasing
attention as an emerging tool for Alzheimer's disease management. Besides, transdermal drug
delivery systems seem to provide hope for the management of various diseases, due to the advantages
that they offer in comparison with oral dosage forms. Herein, the current advancements in transdermal
studies with potent features to achieve better Alzheimer's disease management are presented. Many
researchers have shown that the transdermal systems provide higher efficiency since the first-pass hepatic
metabolism effect can be avoided and a prolonged drug release rate can be achieved. In summary,
the transdermal administration of Alzheimer's drugs is an interesting and promising topic, which
should be further elaborated and studied.
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Affiliation(s)
- Panoraia I. Siafaka
- Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Ece Ö. Bülbül
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - Gökce Mutlu
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Health Sciences, Istanbul, Turkey
| | - Mehmet E. Okur
- Department of Pharmacology, Faculty of Pharmacy, University of Health Sciences, Istanbul, Turkey
| | - Ioannis D. Karantas
- Hippokration General Hospital, 2nd Clinic of Internal Medicine, Thessaloniki, Greece
| | - Neslihan Ü. Okur
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Health Sciences, Istanbul, Turkey
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Zhou X, Jiang X, Qu M, Aninwene G, Jucaud V, Moon JJ, Gu Z, Sun W, Khademhosseini A. Engineering Antiviral Vaccines. ACS NANO 2020; 14:12370-12389. [PMID: 33001626 PMCID: PMC7534801 DOI: 10.1021/acsnano.0c06109] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 09/18/2020] [Indexed: 05/11/2023]
Abstract
Despite the vital role of vaccines in fighting viral pathogens, effective vaccines are still unavailable for many infectious diseases. The importance of vaccines cannot be overstated during the outbreak of a pandemic, such as the coronavirus disease 2019 (COVID-19) pandemic. The understanding of genomics, structural biology, and innate/adaptive immunity have expanded the toolkits available for current vaccine development. However, sudden outbreaks and the requirement of population-level immunization still pose great challenges in today's vaccine designs. Well-established vaccine development protocols from previous experiences are in place to guide the pipelines of vaccine development for emerging viral diseases. Nevertheless, vaccine development may follow different paradigms during a pandemic. For example, multiple vaccine candidates must be pushed into clinical trials simultaneously, and manufacturing capability must be scaled up in early stages. Factors from essential features of safety, efficacy, manufacturing, and distributions to administration approaches are taken into consideration based on advances in materials science and engineering technologies. In this review, we present recent advances in vaccine development by focusing on vaccine discovery, formulation, and delivery devices enabled by alternative administration approaches. We hope to shed light on developing better solutions for faster and better vaccine development strategies through the use of biomaterials, biomolecular engineering, nanotechnology, and microfabrication techniques.
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Affiliation(s)
- Xingwu Zhou
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Center for Minimally Invasive Therapeutics, University of California, Los Angeles, CA, 90095 USA
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Xing Jiang
- School of Nursing, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Moyuan Qu
- The Affiliated Stomatology Hospital, Zhejiang University School of Medicine. Key Laboratory of Oral Biomedical Research of Zhejiang Province, Zhejiang University School of Stomatology. Hangzhou, 310006, China
| | - George Aninwene
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Center for Minimally Invasive Therapeutics, University of California, Los Angeles, CA, 90095 USA
| | - Vadim Jucaud
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA 90064, USA
| | - James J. Moon
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Zhen Gu
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Center for Minimally Invasive Therapeutics, University of California, Los Angeles, CA, 90095 USA
- California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, CA, 90095, USA
| | - Wujin Sun
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Center for Minimally Invasive Therapeutics, University of California, Los Angeles, CA, 90095 USA
- California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA 90064, USA
| | - Ali Khademhosseini
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
- Center for Minimally Invasive Therapeutics, University of California, Los Angeles, CA, 90095 USA
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, CA, 90095, USA
- Department of Radiological Sciences, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA 90064, USA
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Zhu J, Zhou X, Libanori A, Sun W. Microneedle-based bioassays. NANOSCALE ADVANCES 2020; 2:4295-4304. [PMID: 36132929 PMCID: PMC9419780 DOI: 10.1039/d0na00543f] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 08/23/2020] [Indexed: 05/07/2023]
Abstract
Disease diagnosis and therapeutic efficacy can be monitored via a number of established bioassays that sample body fluids to assess and monitor health conditions. Traditional bioassays generally include several steps and start with invasive body fluid extraction procedures. These steps are painful and often require specialized techniques and tailored equipment, as well as the supervision of professional medical personnel. Innovations in engineering alternative bioassays to address these shortcomings are thus desired. Microneedles (MNs) represent promising tools to sample body fluids, in view of their minimal invasiveness, painlessness, and uncomplicated implementation. Recent progress in microfabrication and materials engineering, including the development of hollow and solid MNs with uniquely optimized architectures and multi-functional materials, has positioned MN-based platforms as prime candidates for bioassay solutions. In this minireview, we summarize the studies of MN-based platforms for detection and diagnosis. We categorize the platforms based on three different mechanisms: MNs as body fluid reservoirs, MNs integrated with electrochemical assays, and MNs engineered with colorimetric analyses. A discussion of design principles for MN-based bioassay platforms is presented. We also discuss the challenges and opportunities associated with MN-based bioassays in future clinical applications.
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Affiliation(s)
- Jixiang Zhu
- Department of Bioengineering, Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles Los Angeles CA 90095 USA
- Affiliated Stomatology Hospital of Guangzhou Medical University, Department of Biomedical Engineering, School of Basic Medical Sciences, Guangzhou Medical University Guangzhou 511436 China
| | - Xingwu Zhou
- Department of Bioengineering, Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles Los Angeles CA 90095 USA
| | - Alberto Libanori
- Department of Bioengineering, Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles Los Angeles CA 90095 USA
| | - Wujin Sun
- Department of Bioengineering, Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles Los Angeles CA 90095 USA
- Terasaki Institute for Biomedical Innovation Los Angeles CA 90024 USA
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Ahmed Saeed AL-Japairai K, Mahmood S, Hamed Almurisi S, Reddy Venugopal J, Rebhi Hilles A, Azmana M, Raman S. Current trends in polymer microneedle for transdermal drug delivery. Int J Pharm 2020; 587:119673. [PMID: 32739388 PMCID: PMC7392082 DOI: 10.1016/j.ijpharm.2020.119673] [Citation(s) in RCA: 142] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/11/2020] [Accepted: 07/16/2020] [Indexed: 01/26/2023]
Abstract
Transdermal drug delivery using microneedles is increasingly gaining interest due to the issues associated with oral drug delivery routes. Gastrointestinal route exposes the drug to acid and enzymes present in the stomach, leading to denaturation of the compound and resulting in poor bioavailability. Microneedle transdermal drug delivery addresses the problems linked to oral delivery and to relieves the discomfort of patients associated with injections to increase patient compliance. Microneedles can be broadly classified into five types: solid microneedles, coated microneedles, dissolving microneedles, hollow microneedles, and hydrogel-forming microneedles. The materials used for the preparation of microneedles dictate the different applications and features present in the microneedle. Polymeric microneedle arrays present an improved method for transdermal administration of drugs as they penetrate the skin stratum corneum barrier with minimal invasiveness. The review summarizes the importance of polymeric microneedle and discussed some of the most important therapeutic drugs in research, mainly protein drugs, vaccines and small molecule drugs in regenerative medicine.
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Affiliation(s)
- Khater Ahmed Saeed AL-Japairai
- Department of Pharmaceutical Engineering, Faculty of Chemical and Process Engineering Technology, University Malaysia Pahang, Gambang 26300, Malaysia
| | - Syed Mahmood
- Department of Pharmaceutical Engineering, Faculty of Chemical and Process Engineering Technology, University Malaysia Pahang, Gambang 26300, Malaysia; Centre of Excellence for Advanced Research in Fluid Flow (CARIFF), University Malaysia Pahang, 26300 Gambang, Pahang, Malaysia.
| | - Samah Hamed Almurisi
- Department of Pharmaceutical Technology, Kulliyyah of Pharmacy, International Islamic University Malaysia (IIUM), Kuantan 25200, Malaysia
| | - Jayarama Reddy Venugopal
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, Gambang 26300, Malaysia
| | - Ayah Rebhi Hilles
- Faculty of Health Sciences, Department of Medical Science and Technology, PICOMS International University College of Medical Sciences, 68100 Kuala Lumpur, Malaysia
| | - Motia Azmana
- Department of Pharmaceutical Engineering, Faculty of Chemical and Process Engineering Technology, University Malaysia Pahang, Gambang 26300, Malaysia
| | - Subashini Raman
- Department of Pharmaceutical Engineering, Faculty of Chemical and Process Engineering Technology, University Malaysia Pahang, Gambang 26300, Malaysia
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57
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Davoodi E, Zhianmanesh M, Montazerian H, Milani AS, Hoorfar M. Nano-porous anodic alumina: fundamentals and applications in tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:60. [PMID: 32642974 DOI: 10.1007/s10856-020-06398-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 06/25/2020] [Indexed: 06/11/2023]
Abstract
Recently, nanomaterials have been widely utilized in tissue engineering applications due to their unique properties such as the high surface to volume ratio and diversity of morphology and structure. However, most methods used for the fabrication of nanomaterials are rather complicated and costly. Among different nanomaterials, anodic aluminum oxide (AAO) is a great example of nanoporous structures that can easily be engineered by changing the electrolyte type, anodizing potential, current density, temperature, acid concentration and anodizing time. Nanoporous anodic alumina has often been used for mammalian cell culture, biofunctionalization, drug delivery, and biosensing by coating its surface with biocompatible materials. Despite its wide application in tissue engineering, thorough in vivo and in vitro studies of AAO are still required to enhance its biocompatibility and thereby pave the way for its application in tissue replacements. Recognizing this gap, this review article aims to highlight the biomedical potentials of AAO for applications in tissue replacements along with the mechanism of porous structure formation and pore characteristics in terms of fabrication parameters.
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Affiliation(s)
- Elham Davoodi
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
| | - Masoud Zhianmanesh
- Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, Shabanloo Street, Tehran, 16788, Iran
| | - Hossein Montazerian
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Abbas S Milani
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Mina Hoorfar
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada.
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Abstract
Today, about 50% of men and 15-30% of women suffer from hair loss as well as the associated psychological impact. Drug therapy, especially through topical administration, is the main treatment strategy for stimulating hair regrowth. However, challenges exist due to the skin barrier that hinders drug penetration. To this end, many efforts have been made to enhance drug penetration efficiency. This review focuses on the advancement of the transdermal drug delivery strategies for hair loss therapy reported in the last five years, especially those via nanoformulations for topical administration and microneedles for transdermal delivery. In addition, physical or chemical penetration enhancers are also introduced, which are often applied with the drug delivery systems to achieve a synergy effect.
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Affiliation(s)
- Guang Yang
- Key Laboratory of Science & Technology of Eco-Textile, Donghua University, Ministry of Education, Shanghai 201620, China.,College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, North Ren Min Road No. 2999, Shanghai 201620, China
| | - Guojun Chen
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, United States.,California NanoSystems Institute, Jonsson Comprehensive Cancer Center, and Center for Minimally Invasive Therapeutics, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Zhen Gu
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, United States.,California NanoSystems Institute, Jonsson Comprehensive Cancer Center, and Center for Minimally Invasive Therapeutics, University of California, Los Angeles, Los Angeles, California 90095, United States
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59
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Xie L, Zeng H, Sun J, Qian W. Engineering Microneedles for Therapy and Diagnosis: A Survey. MICROMACHINES 2020; 11:E271. [PMID: 32150866 PMCID: PMC7143426 DOI: 10.3390/mi11030271] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/26/2020] [Accepted: 02/28/2020] [Indexed: 02/07/2023]
Abstract
Microneedle (MN) technology is a rising star in the point-of-care (POC) field, which has gained increasing attention from scientists and clinics. MN-based POC devices show great potential for detecting various analytes of clinical interests and transdermal drug delivery in a minimally invasive manner owing to MNs' micro-size sharp tips and ease of use. This review aims to go through the recent achievements in MN-based devices by investigating the selection of materials, fabrication techniques, classification, and application, respectively. We further highlight critical aspects of MN platforms for transdermal biofluids extraction, diagnosis, and drug delivery assisted disease therapy. Moreover, multifunctional MNs for stimulus-responsive drug delivery systems were discussed, which show incredible potential for accurate and efficient disease treatment in dynamic environments for a long period of time. In addition, we also discuss the remaining challenges and emerging trend of MN-based POC devices from the bench to the bedside.
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Affiliation(s)
- Liping Xie
- College of Medicine and Biological Information Engineering, Northeastern University, Shenyang 110169, China;
| | - Hedele Zeng
- College of Medicine and Biological Information Engineering, Northeastern University, Shenyang 110169, China;
| | - Jianjun Sun
- Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX 79968, USA
| | - Wei Qian
- Department of Electrical and Computer Engineering, University of Texas, EI Paso, TX 79968, USA;
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60
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Zhang X, Wang Y, Chi J, Zhao Y. Smart Microneedles for Therapy and Diagnosis. RESEARCH (WASHINGTON, D.C.) 2020; 2020:7462915. [PMID: 33623910 PMCID: PMC7877383 DOI: 10.34133/2020/7462915] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 10/26/2020] [Indexed: 01/26/2023]
Abstract
Microneedles represent a cutting-edge and idea-inspiring technology in biomedical engineering, which have attracted increasing attention of scientific researchers and medical staffs. Over the past decades, numerous great achievements have been made. The fabrication process of microneedles has been simplified and becomes more precise, easy-to-operate, and reusable. Besides, microneedles with various features have been developed and the microneedle materials have greatly expanded. In recent years, efforts have been focused on generating smart microneedles by endowing them with intriguing functions such as adhesion ability, responsiveness, and controllable drug release. Such improvements enable the microneedles to take an important step in practical applications including household drug delivery devices, wearable biosensors, biomedical assays, cell culture, and microfluidic chip analysis. In this review, the fabrication strategies, distinctive properties, and typical applications of the smart microneedles are discussed. Recent accomplishments, remaining challenges, and future prospects are also presented.
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Affiliation(s)
- Xiaoxuan Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
- Department of Rheumatology and Immunology, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Yuetong Wang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Junjie Chi
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Yuanjin Zhao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
- Department of Rheumatology and Immunology, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
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