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Jin SE, Sung JH. Delivery Strategies of siRNA Therapeutics for Hair Loss Therapy. Int J Mol Sci 2024; 25:7612. [PMID: 39062852 PMCID: PMC11277092 DOI: 10.3390/ijms25147612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 06/25/2024] [Accepted: 07/01/2024] [Indexed: 07/28/2024] Open
Abstract
Therapeutic needs for hair loss are intended to find small interfering ribonucleic acid (siRNA) therapeutics for breakthrough. Since naked siRNA is restricted to meet a druggable target in clinic,, delivery systems are indispensable to overcome intrinsic and pathophysiological barriers, enhancing targetability and persistency to ensure safety, efficacy, and effectiveness. Diverse carriers repurposed from small molecules to siRNA can be systematically or locally employed in hair loss therapy, followed by the adoption of new compositions associated with structural and environmental modification. The siRNA delivery systems have been extensively studied via conjugation or nanoparticle formulation to improve their fate in vitro and in vivo. In this review, we introduce clinically tunable siRNA delivery systems for hair loss based on design principles, after analyzing clinical trials in hair loss and currently approved siRNA therapeutics. We further discuss a strategic research framework for optimized siRNA delivery in hair loss from the scientific perspective of clinical translation.
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Affiliation(s)
- Su-Eon Jin
- Epi Biotech Co., Ltd., Incheon 21984, Republic of Korea
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2
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Malhotra K, Madke B. An Updated Review on Current Treatment of Alopecia Areata and Newer Therapeutic Options. Int J Trichology 2023; 15:3-12. [PMID: 37305188 PMCID: PMC10251289 DOI: 10.4103/ijt.ijt_28_21] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 03/14/2022] [Accepted: 06/14/2022] [Indexed: 06/13/2023] Open
Abstract
Alopecia areata (AA) is a dermatological disease that causes nonscarring hair loss. It can occur at any age and has an unpredictable and variable evolution in individuals. The aim of this review is to provide an update on the novel therapies currently being used, as well as upcoming therapeutic options in the treatment of AA.
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Affiliation(s)
- Karan Malhotra
- Department of Dermatology, Venereology and Leprosy, Desun Hospital, Kolkata, West Bengal, India
| | - Bhushan Madke
- Department of Dermatology, Venereology and Leprosy, Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education & Research (DMIHER) (Deemed to be University), Wardha, Maharashtra, India
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Nanoparticles for Topical Application in the Treatment of Skin Dysfunctions-An Overview of Dermo-Cosmetic and Dermatological Products. Int J Mol Sci 2022; 23:ijms232415980. [PMID: 36555619 PMCID: PMC9780930 DOI: 10.3390/ijms232415980] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Nanomaterials (NM) arouse interest in various fields of science and industry due to their composition-tunable properties and the ease of modification. They appear currently as components of many consumer products such as sunscreen, dressings, sports clothes, surface-cleaning agents, computer devices, paints, as well as pharmaceutical and cosmetics formulations. The use of NPs in products for topical applications improves the permeation/penetration of the bioactive compounds into deeper layers of the skin, providing a depot effect with sustained drug release and specific cellular and subcellular targeting. Nanocarriers provide advances in dermatology and systemic treatments. Examples are a non-invasive method of vaccination, advanced diagnostic techniques, and transdermal drug delivery. The mechanism of action of NPs, efficiency of skin penetration, and potential threat to human health are still open and not fully explained. This review gives a brief outline of the latest nanotechnology achievements in products used in topical applications to prevent and treat skin diseases. We highlighted aspects such as the penetration of NPs through the skin (influence of physical-chemical properties of NPs, the experimental models for skin penetration, methods applied to improve the penetration of NPs through the skin, and methods applied to investigate the skin penetration by NPs). The review summarizes various therapies using NPs to diagnose and treat skin diseases (melanoma, acne, alopecia, vitiligo, psoriasis) and anti-aging and UV-protectant nano-cosmetics.
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Suchonwanit P, Kositkuljorn C, Pomsoong C. Alopecia Areata: An Autoimmune Disease of Multiple Players. Immunotargets Ther 2021; 10:299-312. [PMID: 34350136 PMCID: PMC8328385 DOI: 10.2147/itt.s266409] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 07/17/2021] [Indexed: 12/12/2022] Open
Abstract
Alopecia areata (AA) is an autoimmune disease of the hair follicles. It is characterized by a well-defined non-scarring alopecic patch or patches that may extend to the entire scalp or lead to total body hair loss. Due to its unpredictable clinical course, AA causes substantial psychological harm. Despite the high prevalence of this disease and extensive research, its exact pathomechanism is unclear, and current treatments have a high relapse rate that has deemed AA incurable. Over the past few decades, researchers have investigated multiple potential factors that may help alleviate its pathogenesis and provide effective treatment. Given its complex immunopathogenesis, AA is considered an autoimmune disease with multiple factors. This review gathers current evidence that emphasizes molecular mechanisms, possible causative etiologies, and targeted immunotherapies for AA. Understanding its underlying mechanisms may shed light on new strategies to effectively manage AA in the future.
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Affiliation(s)
- Poonkiat Suchonwanit
- Division of Dermatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Chaninan Kositkuljorn
- Division of Dermatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Cherrin Pomsoong
- Division of Dermatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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Hashimoto K, Yamada Y, Sekiguchi K, Matsuda S, Mori S, Matsumoto T. Induction of alopecia areata in C3H/HeJ mice using cryopreserved lymphocytes. J Dermatol Sci 2021; 102:177-183. [PMID: 33994063 DOI: 10.1016/j.jdermsci.2021.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 04/30/2021] [Accepted: 04/30/2021] [Indexed: 11/18/2022]
Abstract
BACKGROUND Alopecia areata (AA) is an autoimmune disease resulting in non-scarring hair loss. Animal models are useful means to identify candidates for therapeutic agents. The C3H/HeJ mouse AA model induced via transferring cultured lymphoid cells isolated from AA-affected mice is widely used for AA research. However, this conventional method requires the continuous breeding of AA mice. OBJECTIVE We aimed to establish a new method to generate AA model using the transfer of cryopreserved cells, which allows the rapid induction of a large number of AA mice when needed. METHODS We cryopreserved lymph node cells soon after isolation from AA-affected mice and injected thawed-cultured cells into recipient mice. H&E staining, immunohistochemical staining, quantitative real-time PCR and ELISA were conducted to identify pathological characteristics. Flow cytometry was performed to reveal the profile of transferred cells. RESULTS More than 90 % of recipient mice developed AA-like hair loss and showed inflammatory cell infiltration around anagen hair follicles, markedly increased mRNA expressions of interferon-γ, CXCL11, and granzyme B, and elevated interferon-α protein levels in the skin compared with naïve mice. Higher percentages of effector memory T cells and dendritic cells in transferred cells resulted in a higher incidence of AA. CONCLUSION This is the first report to establish a method for generating AA mice using cryopreserved lymphocytes. These AA mice have similar pathological characteristics to AA mice generated with the conventional method and AA patients. This convenient and reproducible method is expected to be valuable for AA study.
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Affiliation(s)
| | | | | | | | - Sachi Mori
- Kyoto R&D Center, Maruho Co., Ltd., Kyoto, Japan
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6
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Immunological Properties of Atopic Dermatitis-Associated Alopecia Areata. Int J Mol Sci 2021; 22:ijms22052618. [PMID: 33807704 PMCID: PMC7961331 DOI: 10.3390/ijms22052618] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/24/2021] [Accepted: 03/03/2021] [Indexed: 12/13/2022] Open
Abstract
Alopecia areata (AA) is regarded as a tissue-specific and cell-mediated autoimmune disorder. Regarding the cytokine balance, AA has been considered a type 1 inflammatory disease. On the other hand, AA often complicates atopic dermatitis (AD) and AD is regarded as type 2 inflammatory disease. However, the immunological aspects of AA in relation to AD are still poorly understood. Therefore, we aim to clarify the immunological properties of AD-associated AA. In this study, we performed comparative analysis of the expression of intracytoplasmic cytokines (IFN-γ, IL-4, and IL-13), chemokine receptors (CXCR3 and CCR4) in peripheral blood which were taken from healthy controls, non-atopic AA patients, AA patients with extrinsic AD, and AA patients with intrinsic AD by flowcytometric analysis. We also compared the scalp skin samples taken from AA patients with extrinsic AD before and after treatment with dupilumab. In non-atopic AA patients, the ratios of CD4+IFN-γ+ cells to CD4+IL-4+ cells and CD4+IFN-γ+ cells to CD4+IL-13+ cells were higher than those in AA patients with extrinsic AD. Meanwhile, the ratio of CD8+IFN-γ+ cells to CD8+IL-13+ cells was significantly higher in the non-atopic AA than in the healthy controls. In AA patients with extrinsic AD, the skin AA lesion showed dense infiltration of not only CXCR3+ cells but also CCR4+ cells around hair bulb before dupilumab treatment. However, after the treatment, the number of CXCR3+ cells had no remarkable change while the number of CCR4+ cells significantly decreased. These results indicate that the immunological condition of AA may be different between atopic and non-atopic patients and between extrinsic and intrinsic AD patients. Our study provides an important notion that type 2 immunity may participate in the development of AA in extrinsic AD patients. It may be considered that the immunological state of non-atopic AA is different from that of atopic AA.
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Advanced Medical Therapies in the Management of Non-Scarring Alopecia: Areata and Androgenic Alopecia. Int J Mol Sci 2020; 21:ijms21218390. [PMID: 33182308 PMCID: PMC7664905 DOI: 10.3390/ijms21218390] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 11/02/2020] [Accepted: 11/06/2020] [Indexed: 12/28/2022] Open
Abstract
Alopecia is a challenging condition for both physicians and patients. Several topical, intralesional, oral, and surgical treatments have been developed in recent decades, but some of those therapies only provide partial improvement. Advanced medical therapies are medical products based on genes, cells, and/or tissue engineering products that have properties in regenerating, repairing, or replacing human tissue. In recent years, numerous applications have been described for advanced medical therapies. With this background, those therapies may have a role in the treatment of various types of alopecia such as alopecia areata and androgenic alopecia. The aim of this review is to provide dermatologists an overview of the different advanced medical therapies that have been applied in the treatment of alopecia, by reviewing clinical and basic research studies as well as ongoing clinical trials.
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Bertolini M, McElwee K, Gilhar A, Bulfone‐Paus S, Paus R. Hair follicle immune privilege and its collapse in alopecia areata. Exp Dermatol 2020; 29:703-725. [DOI: 10.1111/exd.14155] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/18/2020] [Accepted: 07/10/2020] [Indexed: 12/11/2022]
Affiliation(s)
| | - Kevin McElwee
- Monasterium Laboratory Münster Germany
- Centre for Skin Sciences University of Bradford Bradford UK
- Department of Dermatology and Skin Science University of British Columbia Vancouver British Columbia Canada
| | - Amos Gilhar
- Laboratory for Skin Research Rappaport Faculty of Medicine Technion‐Israel Institute of Technology Haifa Israel
| | - Silvia Bulfone‐Paus
- Monasterium Laboratory Münster Germany
- Centre for Dermatology Research University of Manchester and NIHR Manchester Biomedical Research Centre Manchester UK
| | - Ralf Paus
- Monasterium Laboratory Münster Germany
- Centre for Dermatology Research University of Manchester and NIHR Manchester Biomedical Research Centre Manchester UK
- Dr. Philip Frost Department of Dermatology & Cutaneous Surgery University of Miami Miller School of Medicine Miami FL USA
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Ito T, Kageyama R, Nakazawa S, Honda T. Understanding the significance of cytokines and chemokines in the pathogenesis of alopecia areata. Exp Dermatol 2020; 29:726-732. [DOI: 10.1111/exd.14129] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Revised: 05/22/2020] [Accepted: 06/05/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Taisuke Ito
- Department of Dermatology Hamamatsu University School of Medicine Hamamatsu Japan
| | - Reiko Kageyama
- Department of Dermatology Hamamatsu University School of Medicine Hamamatsu Japan
| | - Shinsuke Nakazawa
- Department of Dermatology Hamamatsu University School of Medicine Hamamatsu Japan
| | - Tetsuya Honda
- Department of Dermatology Hamamatsu University School of Medicine Hamamatsu Japan
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Liang X, Zhang J, Ou H, Chen J, Mitragotri S, Chen M. Skin Delivery of siRNA Using Sponge Spicules in Combination with Cationic Flexible Liposomes. MOLECULAR THERAPY. NUCLEIC ACIDS 2020; 20:639-648. [PMID: 32380414 PMCID: PMC7210381 DOI: 10.1016/j.omtn.2020.04.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 04/07/2020] [Accepted: 04/13/2020] [Indexed: 01/22/2023]
Abstract
We report the topical administration of sponge Haliclona sp. Spicules (SHS) combined with cationic flexible liposomes (CFL) to increase the delivery of small interfering RNA (siRNA) into viable skin cells in vitro and in vivo. SHS can be applied topically as novel microneedles to overcome skin barrier by creating plenty of new microchannels in stratum corneum. Subsequently, well-designed CFL can be also utilized topically as nanocarriers to overcome skin cells membrane by delivering siRNA to skin deep layers through these microchannels and thereby facilitating their cell internalization. The topical application of SHS in combination with CFL (0.05% of lipids, w/v), referred to as CFL(0.05%), enhanced siRNA skin penetration in vitro by 72.95 ± 2.97-fold compared to control group (p < 0.001). Further, the topical application of SHS in combination with CFL(0.05%) on female BALB/c mice skin resulted in 29.21% ± 1.41% of glyceraldehyde-3-phosphate dehydrogenase (GAPDH) knockdown at all application area in vivo, which was not significantly different from the GAPDH protein knockdown rate in the subcutaneous injection center. However, the high knockdown rate only appears in the vicinity (<0.5 cm) of the injection center. In sum, this study provides a promising strategy of topical delivery of siRNA by the combined used of SHS and well-designed CFL.
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Affiliation(s)
- XueJiao Liang
- State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, Department of Marine Biological Science & Technology, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - JiaLiang Zhang
- Department of Pharmacy, Dong Fang Hospital (Fuzhou General Hospital), Medical College of Xiamen University, Xiamen University, Fouzhou 350025, China
| | - HuiLong Ou
- State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, Department of Marine Biological Science & Technology, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Jun Chen
- State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, Department of Marine Biological Science & Technology, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Samir Mitragotri
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Ming Chen
- State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, Department of Marine Biological Science & Technology, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China; State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China.
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11
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Ito T, Suzuki T, Funakoshi A, Fujiyama T, Tokura Y. CCR5 is a novel target for the treatment of experimental alopecia areata. JOURNAL OF CUTANEOUS IMMUNOLOGY AND ALLERGY 2020. [DOI: 10.1002/cia2.12092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Affiliation(s)
- Taisuke Ito
- Department of Dermatology Hamamatsu University School of Medicine Hamamatsu Japan
| | - Takahiro Suzuki
- Department of Dermatology & Cutaneous Surgery University of Miami Miller School of Medicine Miami FL USA
| | - Atsuko Funakoshi
- Department of Dermatology Hamamatsu University School of Medicine Hamamatsu Japan
| | - Toshiharu Fujiyama
- Department of Dermatology Hamamatsu University School of Medicine Hamamatsu Japan
| | - Yoshiki Tokura
- Department of Dermatology Hamamatsu University School of Medicine Hamamatsu Japan
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12
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Biomaterial-based delivery systems of nucleic acid for regenerative research and regenerative therapy. Regen Ther 2019; 11:123-130. [PMID: 31338391 PMCID: PMC6626072 DOI: 10.1016/j.reth.2019.06.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 06/10/2019] [Accepted: 06/25/2019] [Indexed: 12/22/2022] Open
Abstract
Regenerative medicine is a new and promising medical method aiming at treating patients with defective or dysfunctional tissues by maintaining or enhancing the biological activity of cells. The development of biomaterial-based technologies, such as cell scaffolds and carriers for drug delivery system, are highly required to promote the regenerative research and regenerative therapy. Nucleic acids are one of the most feasible factors to efficiently modify the biological activity of cells. The effective and stable delivery of nucleic acids into cells is highly required to succeed in the modification. Biomaterials-based non-viral carriers or biological carriers, like exosomes, play an important role in the efficient delivery of nucleic acids. This review introduces the examples of regenerative research and regenerative therapy based on the delivery of nucleic acids with biomaterials technologies and emphasizes their importance to accomplish regenerative medicine. Modifying the activity of cells is important for regenerative medicine. Various nucleic acids regulate gene expression to modify the activity of cells. Intracellular delivery system is vital to the nucleic acids-based modification. Biomaterials are useful for the intracellular delivery of nucleic acids.
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Key Words
- Biomaterials
- CRISPR, clustered regularly interspaced short palindromic repeats
- Cas, CRISPR-associated systems
- Cell scaffold
- DDS, drug delivery system
- Drug delivery system
- ECM, extracellular matrix
- MSC, mesenchymal stem cells
- Nucleic acids
- PEG, polyethylene glycol
- PLGA, poly(d,l-lactic acid-co-glycolic acid)
- RISC, RNA-induced silencing complex
- RNAi, RNA interferince
- Regenerative research
- Regenerative therapy
- TALEN, transcription activator-like effector nuclease
- ZFN, zinc finger nucleases
- lncRNA, long non-coding RNA
- mRNA, messenger RNA
- miRNA, microRNA
- siRNA, small interfering RNA
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Lipid gene nanocarriers for the treatment of skin diseases: Current state-of-the-art. Eur J Pharm Biopharm 2019; 137:95-111. [DOI: 10.1016/j.ejpb.2019.02.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 01/21/2019] [Accepted: 02/15/2019] [Indexed: 12/19/2022]
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Rajabi F, Drake LA, Senna MM, Rezaei N. Alopecia areata: a review of disease pathogenesis. Br J Dermatol 2018; 179:1033-1048. [PMID: 29791718 DOI: 10.1111/bjd.16808] [Citation(s) in RCA: 153] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Alopecia areata is a disorder that results in nonscarring hair loss. The psychological impact can be significant, leading to feelings of depression and social isolation. Objectives In this article, we seek to review the pathophysiological mechanisms proposed in recent years in a narrative fashion. METHODS We searched MEDLINE and Scopus for articles related to alopecia areata, with a particular emphasis on its pathogenesis. RESULTS The main theory of alopecia areata pathogenesis is that it is an autoimmune phenomenon resulting from a disruption in hair follicle immune privilege. What causes this breakdown is an issue of debate. Some believe that a stressed hair follicle environment triggers antigen presentation, while others blame a dysregulation in the central immune system entangling the follicles. Evidence for the latter theory is provided by animal studies, as well investigations around the AIRE gene. Different immune-cell lines including plasmacytoid dendritic cells, natural killer cells and T cells, along with key molecules such as interferon-γ, interleukin-15, MICA and NKG2D, have been identified as contributing to the autoimmune process. CONCLUSIONS Alopecia areata remains incurable, although it has been studied for years. Available treatment options at best are beneficial for milder cases, and the rate of relapse is high. Understanding the exact mechanisms of hair loss in alopecia areata is therefore of utmost importance to help identify potential therapeutic targets.
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Affiliation(s)
- F Rajabi
- Department of Dermatology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - L A Drake
- Massachusetts General Hospital, Harvard Medical School, MA, U.S.A
| | - M M Senna
- Massachusetts General Hospital, Harvard Medical School, MA, U.S.A
| | - N Rezaei
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), Sheffield, U.K
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Li Y, Kilani RT, Pakyari M, Leung G, Nabai L, Ghahary A. Increased expression of PD-L1 and PD-L2 in dermal fibroblasts from alopecia areata mice. J Cell Physiol 2017; 233:2590-2601. [PMID: 28777458 DOI: 10.1002/jcp.26134] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 08/03/2017] [Indexed: 12/21/2022]
Abstract
Alopecia areata (AA) is a common autoimmune disorder affecting millions of people worldwide, which manifests as a sudden, non-scarring hair loss. The expression of a pro-inflammatory cytokine, interferon-gamma (INF-γ), has been well established to be involved in the development of AA. As IFN-γ and other cytokines are also known to up-regulate programmed cell death ligand 1 and 2 (PD-L1 and PD-L2), which both negatively control immune responses, we asked whether or not a high number of infiltrated T cells, seen in AA lesions, can modulate the expression of PD-L1 and PD-L2 in skin cells. From a series of experiments, we showed that a significantly higher number of PD-L1 or PD-L2 positive cells affect the skin in AA mice, compared to the skin of non-AA mice. The number of PD-L1 positive cells was well correlated with the number of infiltrated T cells, especially CD8+ T cells. We also found that the expression of PD-L1 and PD-L2 was co-localized with type 1 pro-collagen, CD90 and vimentin, which are biomarkers for dermal fibroblasts. Further studies revealed that releasable factors from activated, but not inactivated, lymphocytes significantly increase the expressions of both PD-L1 and PD-L2 in cultured dermal fibroblasts. In conclusion, our findings suggest that the expression of PD-L1 and PD-L2 in dermal fibroblasts is up-regulated by activated T cells in AA-affected skin, and as such, these regulatory molecules may not exert a negative control of the immune activation seen in AA lesions.
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Affiliation(s)
- Yunyuan Li
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Ruhi T Kilani
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mohammadreza Pakyari
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Gigi Leung
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Layla Nabai
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Aziz Ghahary
- Department of Surgery, University of British Columbia, Vancouver, British Columbia, Canada
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Fujita M, Otani H, Iwasaki M, Yoshioka K, Shimazu T, Shiojima I, Tabata Y. Antagomir-92a impregnated gelatin hydrogel microsphere sheet enhances cardiac regeneration after myocardial infarction in rats. Regen Ther 2016; 5:9-16. [PMID: 31245495 PMCID: PMC6581790 DOI: 10.1016/j.reth.2016.04.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 04/04/2016] [Accepted: 04/23/2016] [Indexed: 01/07/2023] Open
Abstract
Introduction We investigated whether attachment of gelatin hydrogel microsphere (GHM) sheet impregnated with antagomir-92a on the infarcted heart promotes angiogenesis and cardiomyogenesis, and improves cardiac function after myocardial infarction (MI) in rats. Methods GHM sheet impregnated with antagomir-92a, its scramble sequence antagomir-control sheet or the sheet alone was attached on the area at risk of MI after the left anterior descending coronary artery ligation. Bromodeoxyuridine (BrdU) was included in the sheet to trace proliferating cells. Results The antagomir-92a sheet significantly increased capillary density in the infarct border zone 14 days after MI compared to the antagomir-control sheet or the sheet alone, associated with an increase in endothelial cells incorporated with BrdU. The antagomir-92a sheet significantly increased cardiac stem cells incorporated with BrdU 3 days after MI in the infarct border zone. This was associated with an increase in cardiomyocytes incorporated with BrdU 14 days after MI. Scar area was significantly reduced by the antagomir-92a sheet compared to the antagomir-control sheet or the sheet alone (12.8 ± 1.3 vs 25.2 ± 2.2, 24.0 ± 1.7% LV area, respectively) 14 days after MI. LV dilatation was inhibited, and LV wall motion was improved 14 days after MI in rats with the antagomir-92a sheet compared to the antagomir-control sheet or the sheet alone. Conclusions These results suggest that attachment of the GHM sheet impregnated with antagomir-92a on the area at risk of MI enhances angiogenesis, promotes cardiomyogenesis, and ameliorates LV function.
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Key Words
- Angiogenesis
- BrdU, bromodeoxyuridine
- DAPI, 4′,6-diamidino-2-phenylindole
- DDA, double-distilled water
- FGF, fibroblast growth factor
- FS, fractional shortening
- GA, glutaraldehyde
- GHM, gelatin hydrogel microsphere
- Gelatin hydrogel microsphere
- Heart regeneration
- LAD, left anterior descending
- LV, left ventricular
- LVDd, left ventricular end-diastolic diameter
- LVDs, left ventricular end-systolic diameter
- MI, myocardial infarction
- MSCs, mesenchymal stem cells
- MicroRNA-92a
- VEGF, vascular endothelial growth factor
- miRs, microRNAs
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Affiliation(s)
- Masanori Fujita
- Department of Medicine II, Kansai Medical University, Moriguchi City, Japan
| | - Hajime Otani
- Department of Medicine II, Kansai Medical University, Moriguchi City, Japan
| | - Masayoshi Iwasaki
- Department of Medicine II, Kansai Medical University, Moriguchi City, Japan
| | - Kei Yoshioka
- Department of Medicine II, Kansai Medical University, Moriguchi City, Japan
| | - Takayuki Shimazu
- Department of Medicine II, Kansai Medical University, Moriguchi City, Japan
| | - Ichiro Shiojima
- Department of Medicine II, Kansai Medical University, Moriguchi City, Japan
| | - Yasuhiko Tabata
- Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto University, Kyoto City, Japan
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17
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Gilhar A, Schrum AG, Etzioni A, Waldmann H, Paus R. Alopecia areata: Animal models illuminate autoimmune pathogenesis and novel immunotherapeutic strategies. Autoimmun Rev 2016; 15:726-35. [PMID: 26971464 DOI: 10.1016/j.autrev.2016.03.008] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 03/02/2016] [Indexed: 01/13/2023]
Abstract
One of the most common human autoimmune diseases, alopecia areata (AA), is characterized by sudden, often persisting and psychologically devastating hair loss. Animal models have helped greatly to elucidate critical cellular and molecular immune pathways in AA. The two most prominent ones are inbred C3H/HeJ mice which develop an AA-like hair phenotype spontaneously or after experimental induction, and healthy human scalp skin xenotransplanted onto SCID mice, in which a phenocopy of human AA is induced by injecting IL-2-stimulated PBMCs enriched for CD56+/NKG2D+ cells intradermally. The current review critically examines the pros and cons of the available AA animal models and how they have shaped our understanding of AA pathobiology, and the development of new therapeutic strategies. AA is thought to arise when the hair follicle's (HF) natural immune privilege (IP) collapses, inducing ectopic MHC class I expression in the HF epithelium and autoantigen presentation to autoreactive CD8+ T cells. In common with other autoimmune diseases, upregulation of IFN-γ and IL-15 is critically implicated in AA pathogenesis, as are NKG2D and its ligands, MICA, and ULBP3. The C3H/HeJ mouse model was used to identify key immune cell and molecular principles in murine AA, and proof-of-principle that Janus kinase (JAK) inhibitors are suitable agents for AA management in vivo, since both IFN-γ and IL-15 signal via the JAK pathway. Instead, the humanized mouse model of AA has been used to demonstrate the previously hypothesized key role of CD8+ T cells and NKG2D+ cells in AA pathogenesis and to discover human-specific pharmacologic targets like the potassium channel Kv1.3, and to show that the PDE4 inhibitor, apremilast, inhibits AA development in human skin. As such, AA provides a model disease, in which to contemplate general challenges, opportunities, and limitations one faces when selecting appropriate animal models in preclinical research for human autoimmune diseases.
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Affiliation(s)
- Amos Gilhar
- Skin Research Laboratory, Faculty of Medicine, Technion - Israel Institute of Technology, Flieman Medical Center, PO Box 9649, Haifa, Israel.
| | - Adam G Schrum
- Department of Immunology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Amos Etzioni
- Ruth Children Hospital, Haifa, Israel; Rappaport Medical School, Technion, Haifa, Israel
| | - Herman Waldmann
- Therapeutic Immunology Group, Sir William Dunn School of Pathology, University of Oxford, Oxford, UK
| | - Ralf Paus
- Centre for Dermatology Research, Inst. of Inflammation and Repair, University of Manchester, Manchester, UK; Department of Dermatology, University of Münster, Münster, Germany
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18
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Deng Y, Chen J, Zhao Y, Yan X, Zhang L, Choy K, Hu J, Sant HJ, Gale BK, Tang T. Transdermal Delivery of siRNA through Microneedle Array. Sci Rep 2016; 6:21422. [PMID: 26888011 PMCID: PMC4757825 DOI: 10.1038/srep21422] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 01/22/2016] [Indexed: 01/07/2023] Open
Abstract
Successful development of siRNA therapies has significant potential for the treatment of skin conditions (alopecia, allergic skin diseases, hyperpigmentation, psoriasis, skin cancer, pachyonychia congenital) caused by aberrant gene expression. Although hypodermic needles can be used to effectively deliver siRNA through the stratum corneum, the major challenge is that this approach is painful and the effects are restricted to the injection site. Microneedle arrays may represent a better way to deliver siRNAs across the stratum corneum. In this study, we evaluated for the first time the ability of the solid silicon microneedle array for punching holes to deliver cholesterol-modified housekeeping gene (Gapdh) siRNA to the mouse ear skin. Treating the ear with microneedles showed permeation of siRNA in the skin and could reduce Gapdh gene expression up to 66% in the skin without accumulation in the major organs. The results showed that microneedle arrays could effectively deliver siRNA to relevant regions of the skin noninvasively.
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Affiliation(s)
- Yan Deng
- Department of Obstetrics &Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.,Shenzhen Research Institute, The Chinese University of Hong Kong, China
| | - Jiao Chen
- Department of Obstetrics &Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.,Shenzhen Research Institute, The Chinese University of Hong Kong, China
| | - Yi Zhao
- Department of Obstetrics &Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Xiaohui Yan
- Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Li Zhang
- Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.,Chow Yuk Ho Technology Centre for Innovative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Kwongwai Choy
- Department of Obstetrics &Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.,Shenzhen Research Institute, The Chinese University of Hong Kong, China
| | - Jun Hu
- Peking University Shenzhen Hospital, Shenzhen, China
| | - Himanshu J Sant
- State of Utah Centre of Excellence for Biomedical Microfluidics, Departments of Bioengineering and Mechanical Engineering, University of Utah, Salt Lake City, UT 84112, USA
| | - Bruce K Gale
- State of Utah Centre of Excellence for Biomedical Microfluidics, Departments of Bioengineering and Mechanical Engineering, University of Utah, Salt Lake City, UT 84112, USA
| | - Tao Tang
- Department of Obstetrics &Gynaecology, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.,Shenzhen Research Institute, The Chinese University of Hong Kong, China
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19
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Aljuffali IA, Lin YK, Fang JY. Noninvasive approach for enhancing small interfering RNA delivery percutaneously. Expert Opin Drug Deliv 2015; 13:265-80. [DOI: 10.1517/17425247.2016.1121988] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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20
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Sarett SM, Nelson CE, Duvall CL. Technologies for controlled, local delivery of siRNA. J Control Release 2015; 218:94-113. [PMID: 26476177 PMCID: PMC4665980 DOI: 10.1016/j.jconrel.2015.09.066] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 09/25/2015] [Accepted: 09/29/2015] [Indexed: 12/24/2022]
Abstract
The discovery of RNAi in the late 1990s unlocked a new realm of therapeutic possibilities by enabling potent and specific silencing of theoretically any desired genetic target. Better elucidation of the mechanism of action, the impact of chemical modifications that stabilize and reduce nonspecific effects of siRNA molecules, and the key design considerations for effective delivery systems has spurred progress toward developing clinically-successful siRNA therapies. A logical aim for initial siRNA translation is local therapies, as delivering siRNA directly to its site of action helps to ensure that a sufficient dose reaches the target tissue, lessens the potential for off-target side effects, and circumvents the substantial systemic delivery barriers. While locally injected or topically applied siRNA has progressed into numerous clinical trials, an enormous opportunity exists to develop sustained-release, local delivery systems that enable both spatial and temporal control of gene silencing. This review focuses on material platforms that establish both localized and controlled gene silencing, with emphasis on the systems that show most promise for clinical translation.
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Affiliation(s)
- Samantha M Sarett
- Vanderbilt University Department of Biomedical Engineering, United States
| | | | - Craig L Duvall
- Vanderbilt University Department of Biomedical Engineering, United States.
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21
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Jo JI, Tabata Y. How controlled release technology can aid gene delivery. Expert Opin Drug Deliv 2015; 12:1689-701. [DOI: 10.1517/17425247.2015.1048221] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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22
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Ito T, Tokura Y. The role of cytokines and chemokines in the T-cell-mediated autoimmune process in alopecia areata. Exp Dermatol 2014; 23:787-91. [DOI: 10.1111/exd.12489] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/29/2014] [Indexed: 12/12/2022]
Affiliation(s)
- Taisuke Ito
- Department of Dermatology; Hamamatsu University School of Medicine; Hamamatsu Japan
| | - Yoshiki Tokura
- Department of Dermatology; Hamamatsu University School of Medicine; Hamamatsu Japan
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23
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Antonio JR, Antônio CR, Cardeal ILS, Ballavenuto JMA, Oliveira JR. Nanotechnology in dermatology. An Bras Dermatol 2014; 89:126-36. [PMID: 24626657 PMCID: PMC3938363 DOI: 10.1590/abd1806-4841.20142228] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Accepted: 01/17/2013] [Indexed: 01/22/2023] Open
Abstract
The scientific community and general public have been exposed to a series of achievements attributed to a new area of knowledge: Nanotechnology. Both abroad and in Brazil, funding agencies have launched programs aimed at encouraging this type of research. Indeed, for many who come into contact with this subject it will be clear the key role that chemical knowledge will play in the evolution of this subject. And even more, will see that it is a science in which the basic structure is formed by distilling different areas of inter-and multidisciplinary knowledge along the lines of new paradigms. In this article, we attempt to clarify the foundations of nanotechnology, and demonstrate their contribution to new advances in dermatology as well as medicine in general. Nanotechnology is clearly the future.
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Affiliation(s)
- João Roberto Antonio
- São José do Rio Preto State School of Medicine, Hospital de Base, Dermatology Service, São José do Rio PretoSP, Brazil, Emeritus Professor, State School of Medicine, São José do Rio Preto (FAMERP) - Head of Dermatology and the Dermatology Service, Hospital de Base, São José do Rio Preto State School of Medicine (FAMERP) - São José do Rio Preto (SP), Brazil
| | - Carlos Roberto Antônio
- São José do Rio Preto State School of Medicine, Hospital de Base, Dermatology Service, São José do Rio PretoSP, Brazil, Doctor Dermatologist - Professor responsible for Dermatological and Laser Surgery, Dermatology Service, Hospital de Base, São José do Rio Preto State School of Medicine (FAMERP) - São José do Rio Preto (SP), Brazil
| | - Izabela Lídia Soares Cardeal
- São José do Rio Preto State School of Medicine, Hospital de Base, São José do Rio PretoSP, Brazil, Doctor, State School of Medicine, São José do Rio Preto (FAMERP). Resident of the Dermatology Service, Hospital de Base, São José do Rio Preto State School of Medicine (FAMERP) - São José do Rio Preto (SP), Brazil
| | - Julia Maria Avelino Ballavenuto
- São José do Rio Preto State School of Medicine, São José do Rio PretoSP, Brazil, Medical Academic, São José do Rio Preto State School of Medicine (FAMERP) - São José do Rio Preto (SP), Brazil
| | - João Rodrigo Oliveira
- São José do Rio Preto State School of Medicine, São José do Rio PretoSP, Brazil, Medical Academic, São José do Rio Preto State School of Medicine (FAMERP) - São José do Rio Preto (SP), Brazil
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24
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Vogt A, Blume-Peytavi U. Selective hair therapy: bringing science to the fiction. Exp Dermatol 2014; 23:83-6. [PMID: 24387677 DOI: 10.1111/exd.12318] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/30/2013] [Indexed: 01/17/2023]
Abstract
Investigations on carrier-based drug delivery systems for higher selectivity in hair therapy have clearly evolved from dye release and model studies to highly sophisticated approaches, many of which specifically tackle hair indications and the delivery of hair-relevant molecules. Here, we group recent hair disease-oriented work into efforts towards (i) improved delivery of conventional drugs, (ii) delivery of novel drug classes, for example biomolecules and (iii) targeted delivery on the cellular/molecular level. Considering the solid foundation of experimental work, it does not take a large step outside the current box of thinking to follow the idea of using large carriers (>500 nm, unlikely to penetrate as a whole) for follicular penetration, retention and protection of sensitive compounds. Yet, reports on particles <200 nm being internalized by keratinocytes and dendritic cells at sites of barrier disruption (e.g., hair follicles) combined with recent advances in nanodermatology add interesting new facets to the possibilities carrier technologies could offer, for example, unprecedented levels of selectivity. The authors provide thought-provoking ideas on how smart delivery technologies and advances in our molecular understanding of hair pathophysiology could result in a whole new era of hair therapeutics. As the field still largely remains in preclinical investigation, determined efforts towards production of medical grade material and truly translational work are needed to demonstrate surplus value of carrier systems for clinical applications.
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Affiliation(s)
- Annika Vogt
- Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Berlin, Germany
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25
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Abstract
Cutaneous delivery of therapeutics represents a proven and attractive option for treating a variety of dermatologic conditions with minimal systemic side effects. Although there have been many innovations in drug delivery systems, the number of effective cutaneous drugs remains small, primarily because of the stratum corneum permeability barrier. Overcoming this barrier safely and reversibly to deliver large hydrophilic drugs cutaneously is one of the major challenges in the field of dermatologic therapy.
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26
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Rancan F, Blume-Peytavi U, Vogt A. Utilization of biodegradable polymeric materials as delivery agents in dermatology. Clin Cosmet Investig Dermatol 2014; 7:23-34. [PMID: 24470766 PMCID: PMC3891488 DOI: 10.2147/ccid.s39559] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Biodegradable polymeric materials are ideal carrier systems for biomedical applications. Features like controlled and sustained delivery, improved drug pharmacokinetics, reduced side effects and safe degradation make the use of these materials very attractive in a lot of medical fields, with dermatology included. A number of studies have shown that particle-based formulations can improve the skin penetration of topically applied drugs. However, for a successful translation of these promising results into a clinical application, a more rational approach is needed to take into account the different properties of diseased skin and the fate of these polymeric materials after topical application. In fact, each pathological skin condition poses different challenges and the way diseased skin interacts with polymeric carriers might be markedly different to that of healthy skin. In most inflammatory skin conditions, the skin's barrier is impaired and the local immune system is activated. A better understanding of such mechanisms has the potential to improve the efficacy of carrier-based dermatotherapy. Such knowledge would allow the informed choice of the type of polymeric carrier depending on the skin condition to be treated, the type of drug to be loaded, and the desired release kinetics. Furthermore, a better control of polymer degradation and release properties in accordance with the skin environment would improve the safety and the selectivity of drug release. This review aims at summarizing the current knowledge on how polymeric delivery systems interact with healthy and diseased skin, giving an overview of the challenges that different pathological skin conditions pose to the development of safer and more specific dermatotherapies.
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Affiliation(s)
- Fiorenza Rancan
- Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Germany
| | - Ulrike Blume-Peytavi
- Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Germany
| | - Annika Vogt
- Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Germany
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27
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Ito T, Fujiyama T, Hashizume H, Tokura Y. Antihistaminic drug olopatadine downmodulates T cell chemotaxis toward CXCL10 by reducing CXCR3 expression, F-actin polymerization and calcium influx in patients with alopecia areata. J Dermatol Sci 2013; 72:68-71. [DOI: 10.1016/j.jdermsci.2013.04.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 04/30/2013] [Accepted: 04/30/2013] [Indexed: 10/26/2022]
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28
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Inui S, Noguchi F, Nakajima T, Itami S. Serum thymus and activation-regulated chemokine as disease activity and response biomarker in alopecia areata. J Dermatol 2013; 40:881-5. [DOI: 10.1111/1346-8138.12273] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 07/28/2013] [Indexed: 01/14/2023]
Affiliation(s)
- Shigeki Inui
- Department of Regenerative Dermatology; Osaka University Graduate School of Medicine; Suita Japan
| | - Fumihito Noguchi
- Department of Regenerative Dermatology; Osaka University Graduate School of Medicine; Suita Japan
| | - Takeshi Nakajima
- Department of Regenerative Dermatology; Osaka University Graduate School of Medicine; Suita Japan
| | - Satoshi Itami
- Department of Regenerative Dermatology; Osaka University Graduate School of Medicine; Suita Japan
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29
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McElwee KJ, Gilhar A, Tobin DJ, Ramot Y, Sundberg JP, Nakamura M, Bertolini M, Inui S, Tokura Y, Jr LEK, Duque-Estrada B, Tosti A, Keren A, Itami S, Shoenfeld Y, Zlotogorski A, Paus R. What causes alopecia areata? Exp Dermatol 2013; 22:609-26. [PMID: 23947678 PMCID: PMC4094373 DOI: 10.1111/exd.12209] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The pathobiology of alopecia areata (AA), one of the most frequent autoimmune diseases and a major unsolved clinical problem, has intrigued dermatologists, hair biologists and immunologists for decades. Simultaneously, both affected patients and the physicians who take care of them are increasingly frustrated that there is still no fully satisfactory treatment. Much of this frustration results from the fact that the pathobiology of AA remains unclear, and no single AA pathogenesis concept can claim to be universally accepted. In fact, some investigators still harbour doubts whether this even is an autoimmune disease, and the relative importance of CD8(+) T cells, CD4(+) T cells and NKGD2(+) NK or NKT cells and the exact role of genetic factors in AA pathogenesis remain bones of contention. Also, is AA one disease, a spectrum of distinct disease entities or only a response pattern of normal hair follicles to immunologically mediated damage? During the past decade, substantial progress has been made in basic AA-related research, in the development of new models for translationally relevant AA research and in the identification of new therapeutic agents and targets for future AA management. This calls for a re-evaluation and public debate of currently prevalent AA pathobiology concepts. The present Controversies feature takes on this challenge, hoping to attract more skin biologists, immunologists and professional autoimmunity experts to this biologically fascinating and clinically important model disease.
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Affiliation(s)
- K. J. McElwee
- Department of Dermatology and Skin Science, University of British Columbia, Vancouver, BC, Canada
| | - A. Gilhar
- Laboratory for Skin, Research, Rappaport Faculty of Medicine, Technion–Israel Institute of Technology, Haifa, Israel Marta Bertolini
| | - D. J. Tobin
- Centre for Skin Sciences, School of Life Sciences, University of Bradford, Bradford, West Yorkshire, BD7 1DP, UK
| | - Y. Ramot
- Department of Dermatology, Hadassah- Hebrew University Medical Center, Jerusalem 91120, Israel
| | - J. P. Sundberg
- The Jackson Laboratory, Bar Harbor, ME, USA; Division of Dermatology, Skin Disease Research Center, Vanderbilt University, Nashville, TN, USA
| | - M. Nakamura
- Department of Dermatology, University of Occupational and Environmental Health, Kitakyushu, Japan Yoshiki Tokura
| | - M. Bertolini
- Department of Dermatology, University of Lübeck, Germany Yehuda Shoenfeld
| | - S. Inui
- Department of Regenerative Dermatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Y. Tokura
- Department of Dermatology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - L. E. King Jr
- The Jackson Laboratory, Bar Harbor, ME, USA; Division of Dermatology, Skin Disease Research Center, Vanderbilt University, Nashville, TN, USA
| | - B. Duque-Estrada
- Instituto de Dermatologia Prof. Rubem David Azulay, Rio de Janeiro, Brazil Antonella Tosti
| | - A Tosti
- Department of Dermatology, University of Miami, Miami, FL, USA
| | - A. Keren
- Laboratory for Skin, Research, Rappaport Faculty of Medicine, Technion–Israel Institute of Technology, Haifa, Israel Marta Bertolini
| | - S. Itami
- Department of Regenerative Dermatology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Y. Shoenfeld
- Center for Autoimmune Diseases, Sheba Medical Center, Tel Hashomer and Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, Israel
| | - A. Zlotogorski
- Department of Dermatology, Hadassah- Hebrew University Medical Center, Jerusalem 91120, Israel
| | - R. Paus
- Department of Dermatology, University of Lübeck, Germany; Institute of Inflammation and Repair, University of Manchester, Manchester, UK ,
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30
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The association between Interleukin (IL)-4 gene intron 3 VNTR polymorphism and alopecia areata (AA) in Turkish population. Gene 2013; 527:565-9. [DOI: 10.1016/j.gene.2013.05.086] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 05/17/2013] [Accepted: 05/29/2013] [Indexed: 01/23/2023]
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31
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Duncan FJ, Silva KA, Johnson C, King B, Szatkiewicz JP, Kamdar S, Ong DE, Napoli JL, Wang J, King LE, Whiting DA, McElwee KJ, Sundberg JP, Everts HB. Endogenous retinoids in the pathogenesis of alopecia areata. J Invest Dermatol 2013; 133:334-43. [PMID: 23014334 PMCID: PMC3546144 DOI: 10.1038/jid.2012.344] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Alopecia areata (AA) is an autoimmune disease that attacks anagen hair follicles. Gene array in graft-induced C3H/HeJ mice revealed that genes involved in retinoic acid (RA) synthesis were increased, whereas RA degradation genes were decreased in AA compared with sham controls. This was confirmed by immunohistochemistry in biopsies from patients with AA and both mouse and rat AA models. RA levels were also increased in C3H/HeJ mice with AA. C3H/HeJ mice were fed a purified diet containing one of the four levels of dietary vitamin A or an unpurified diet 2 weeks before grafting and disease progression followed. High vitamin A accelerated AA, whereas mice that were not fed vitamin A had more severe disease by the end of the study. More hair follicles were in anagen in mice fed high vitamin A. Both the number and localization of granzyme B-positive cells were altered by vitamin A. IFNγ was also the lowest and IL13 highest in mice fed high vitamin A. Other cytokines were reduced and chemokines increased as the disease progressed, but no additional effects of vitamin A were seen. Combined, these results suggest that vitamin A regulates both the hair cycle and immune response to alter the progression of AA.
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Affiliation(s)
- F. Jason Duncan
- Department of Nutrition, The Ohio State University, Columbus, OH
| | | | - Charles Johnson
- Department of Nutrition, The Ohio State University, Columbus, OH
| | | | | | | | - David E. Ong
- Vanderbilt University Medical Center, Nashville, TN
| | | | | | | | | | | | - John P. Sundberg
- The Jackson Laboratory, Bar Harbor, ME
- Vanderbilt University Medical Center, Nashville, TN
| | - Helen B. Everts
- Department of Nutrition, The Ohio State University, Columbus, OH
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32
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Vicentini FTMDC, Borgheti-Cardoso LN, Depieri LV, de Macedo Mano D, Abelha TF, Petrilli R, Bentley MVLB. Delivery systems and local administration routes for therapeutic siRNA. Pharm Res 2013; 30:915-31. [PMID: 23344907 PMCID: PMC7088712 DOI: 10.1007/s11095-013-0971-1] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2011] [Accepted: 01/03/2013] [Indexed: 01/28/2023]
Abstract
With the increasing number of studies proposing new and optimal delivery strategies for the efficacious silencing of gene-related diseases by the local administration of siRNAs, the present review aims to provide a broad overview of the most important and latest developments of non-viral siRNA delivery systems for local administration. Moreover, the main disease targets for the local delivery of siRNA to specific tissues or organs, including the skin, the lung, the eye, the nervous system, the digestive system and the vagina, were explored.
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33
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Chong RHE, Gonzalez-Gonzalez E, Lara MF, Speaker TJ, Contag CH, Kaspar RL, Coulman SA, Hargest R, Birchall JC. Gene silencing following siRNA delivery to skin via coated steel microneedles: In vitro and in vivo proof-of-concept. J Control Release 2013; 166:211-9. [PMID: 23313112 DOI: 10.1016/j.jconrel.2012.12.030] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 12/24/2012] [Accepted: 12/30/2012] [Indexed: 11/28/2022]
Abstract
The development of siRNA-based gene silencing therapies has significant potential for effectively treating debilitating genetic, hyper-proliferative or malignant skin conditions caused by aberrant gene expression. To be efficacious and widely accepted by physicians and patients, therapeutic siRNAs must access the viable skin layers in a stable and functional form, preferably without painful administration. In this study we explore the use of minimally-invasive steel microneedle devices to effectively deliver siRNA into skin. A simple, yet precise microneedle coating method permitted reproducible loading of siRNA onto individual microneedles. Following recovery from the microneedle surface, lamin A/C siRNA retained full activity, as demonstrated by significant reduction in lamin A/C mRNA levels and reduced lamin A/C protein in HaCaT keratinocyte cells. However, lamin A/C siRNA pre-complexed with a commercial lipid-based transfection reagent (siRNA lipoplex) was less functional following microneedle coating. As Accell-modified "self-delivery" siRNA targeted against CD44 also retained functionality after microneedle coating, this form of siRNA was used in subsequent in vivo studies, where gene silencing was determined in a transgenic reporter mouse skin model. Self-delivery siRNA targeting the reporter (luciferase/GFP) gene was coated onto microneedles and delivered to mouse footpad. Quantification of reporter mRNA and intravital imaging of reporter expression in the outer skin layers confirmed functional in vivo gene silencing following microneedle delivery of siRNA. The use of coated metal microneedles represents a new, simple, minimally-invasive, patient-friendly and potentially self-administrable method for the delivery of therapeutic nucleic acids to the skin.
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Affiliation(s)
- Rosalind H E Chong
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff CF10 3NB, UK
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Liquid crystalline phase nanodispersions enable skin delivery of siRNA. Eur J Pharm Biopharm 2013; 83:16-24. [DOI: 10.1016/j.ejpb.2012.08.011] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Revised: 05/04/2012] [Accepted: 08/22/2012] [Indexed: 01/03/2023]
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HSP47 siRNA conjugated with cationized gelatin microspheres suppresses peritoneal fibrosis in mice. Acta Biomater 2012; 8:2688-96. [PMID: 22487929 DOI: 10.1016/j.actbio.2012.03.050] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 03/12/2012] [Accepted: 03/29/2012] [Indexed: 01/12/2023]
Abstract
Heat shock protein 47 (HSP47), a collagen-specific molecular chaperone, is essential for the biosynthesis and secretion of collagen and is expressed in the fibrotic peritoneum. In the present study, we evaluated the efficacy of HSP47 small interfering RNA (siRNA) to suppress the development of peritoneal fibrosis induced by chlorhexidine gluconate in mice. We initially confirmed that biodegradable cationized gelatin microspheres (CGMs) containing HSP47 siRNA could continuously release siRNA over 21 days as a result of microsphere degradation. We then determined that a single injection of CGMs incorporating HSP47 siRNA suppressed collagen expression and macrophage infiltration, thereby preventing peritoneal fibrosis. Therefore, we suggest that this controlled-release technology using HSP47 siRNA is a potential treatment for peritoneal fibrosis. Additionally, RNA interference combined with CGMs as a drug-delivery system may lead to new strategies for knocking down specific genes in vivo.
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Doi N, Jo JI, Tabata Y. Preparation of Biodegradable Gelatin Nanospheres with a Narrow Size Distribution for Carrier of Cellular Internalization of Plasmid DNA. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 23:991-1004. [DOI: 10.1163/092050611x568214] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Norio Doi
- a Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto University, 53 Kawara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Jun-Ichiro Jo
- b Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto University, 53 Kawara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Yasuhiko Tabata
- c Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto University, 53 Kawara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
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Local suppression of pro-inflammatory cytokines and the effects in BMP-2-induced bone regeneration. Biomaterials 2012; 33:304-16. [DOI: 10.1016/j.biomaterials.2011.09.050] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Accepted: 09/21/2011] [Indexed: 12/31/2022]
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Uesugi Y, Kawata H, Saito Y, Tabata Y. Ultrasound-responsive thrombus treatment with zinc-stabilized gelatin nano-complexes of tissue-type plasminogen activator. J Drug Target 2011; 20:224-34. [DOI: 10.3109/1061186x.2011.633259] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Papakostas D, Rancan F, Sterry W, Blume-Peytavi U, Vogt A. Nanoparticles in dermatology. Arch Dermatol Res 2011; 303:533-50. [PMID: 21837474 DOI: 10.1007/s00403-011-1163-7] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 06/16/2011] [Accepted: 06/29/2011] [Indexed: 12/17/2022]
Abstract
Recent advances in the field of nanotechnology have allowed the manufacturing of elaborated nanometer-sized particles for various biomedical applications. A broad spectrum of particles, extending from various lipid nanostructures such as liposomes and solid lipid nanoparticles, to metal, nanocrystalline and polymer particles have already been tested as drug delivery systems in different animal models with remarkable results, promising an extensive commercialization in the coming years. Controlled drug release to skin and skin appendages, targeting of hair follicle-specific cell populations, transcutaneous vaccination and transdermal gene therapy are only a few of these new applications. Carrier systems of the new generation take advantage of improved skin penetration properties, depot effect with sustained drug release and of surface functionalization (e.g., the binding to specific ligands) allowing specific cellular and subcellular targeting. Drug delivery to skin by means of microparticles and nanocarriers could revolutionize the treatment of several skin disorders. However, the toxicological and environmental safety of micro- and nanoparticles has to be evaluated using specific toxicological studies prior to a wider implementation of the new technology. This review aims to give an overview of the most investigated applications of transcutaneously applied particle-based formulations in the fields of cosmetics and dermatology.
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Affiliation(s)
- Dimitrios Papakostas
- Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité-Universitätsmedizin Berlin, Germany
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Mukozawa A, Ueki K, Marukawa K, Okabe K, Moroi A, Nakagawa K. Bone healing of critical-sized nasal defects in rabbits by statins in two different carriers. Clin Oral Implants Res 2011; 22:1327-35. [PMID: 21732983 DOI: 10.1111/j.1600-0501.2010.02135.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To evaluate bone healing following implantation of a statin with two different carriers in rabbit nasal bone using histological and immunohistochemical methods. MATERIALS AND METHODS Twenty adult, male Japanese white rabbits (age: 12-16 weeks, weight: 2.5-3 kg) were used in this study. Five bone circular defects (5 mm in diameter) per rabbit were created in the nasal bone while preserving the nasal membrane. In the experimental groups, 2.5 mg/ml simvastatin dissolved in 0.2 ml water with hydrogel was implanted in one group, 2.5 mg/ml simvastatin dissolved in 0.2 ml water with an atelocollagen sponge (ACS) in the second group with, only the hydrogel in the third group and only an ACS in the fourth group. No material was implanted in the control group. Four animals were killed in each period, at 1, 2, 4, 8 and 12 weeks postoperatively. The parts that had been operated on were removed and prepared for histological assessment. The expression of bone morphogenetic proteins (BMP)-2 and the bone ration was evaluated using histological and immunohistochemical methods. RESULTS No significant differences were observed between the simvastatin with hydrogel group and the simvastatin with ACS group at 1, 2, 4, 8 and 12 weeks postoperatively regarding expression of BMP-2, although the number of cells that stained positive for BMP-2 in both of the implanted groups increased significantly at 2 and 4 weeks postoperatively in comparison with the control group (P<0.0001). For new bone area ratio, there were no significant differences between the simvastatin with hydrogel groups and the simvastatin with ACS group after 2, 4, 8 and 12 weeks, although these groups showed higher value than control group (P<0.0001). CONCLUSION This study suggests that both the simvastatin with hydrogel and simvastatin with ACS implants showed similar BMP-2 expression and new bone formation, and there were no significant differences between the two carriers.
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Affiliation(s)
- Aya Mukozawa
- Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kanazawa University, Kanazawa, Japan
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Uesugi Y, Kawata H, Jo JI, Saito Y, Tabata Y. An ultrasound-responsive nano delivery system of tissue-type plasminogen activator for thrombolytic therapy. J Control Release 2010; 147:269-77. [DOI: 10.1016/j.jconrel.2010.07.127] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 07/21/2010] [Accepted: 07/29/2010] [Indexed: 11/30/2022]
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Honjo K, Takahashi KA, Mazda O, Kishida T, Shinya M, Tokunaga D, Arai Y, Inoue A, Hiraoka N, Imanishi J, Kubo T. MDR1a/1b gene silencing enhances drug sensitivity in rat fibroblast-like synoviocytes. J Gene Med 2010; 12:219-27. [PMID: 19950109 DOI: 10.1002/jgm.1378] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Drug resistance mediated by P-glycoprotein (P-gp) is one of the major reasons for the failure of rheumatoid arthritis (RA) therapy with disease modifying anti-rheumatic drugs and glucocorticoids. In the present study, we aimed to investigate the in vitro effectiveness of small interfering RNA (siRNA) to render rat fibroblast-like synoviocytes (FLS) susceptible to drugs. We also attempted the electroporation-mediated transfer of siRNA against multidrug resistance (MDR) genes into rat knee joints. METHODS FLS were transfected with siRNAs corresponding to MDR1a and MDR1b genes. FLS were treated with dexamethasone (DEX) and lipopolysaccharide. The mRNA and protein levels of tumor necrosis factor-alpha, interleukin (IL)-6 and IL-1beta were measured. Both siRNAs were co-transduced into rat knee joints by an electroporation method and evaluated the target gene expressions in the synovium. RESULTS Each siRNA could sequence-specifically reduce the target gene expression by over 70% and effectively suppressed P-gp expression and function in the FLS. Both gene expression and protein production of the inflammatory cytokines in the cells transfected with siRNA were reduced by a greater amount compared to in control cells. The in vivo electroporation-mediated transduction of siRNA could significantly inhibit the target gene expressions. CONCLUSIONS MDR1a/1b gene silencing by siRNA could effectively inhibit P-gp in rat FLS, resulting in a significant enhancement of the anti-inflammatory effects of DEX. The in vivo siRNA transduction could successfully silence MDR gene expression in the rat synovium. These findings indicate that the siRNA targeting MDR gene could be a useful tool for treating refractory arthritis in RA.
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Affiliation(s)
- Kuniaki Honjo
- Department of Orthopaedics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Harris JE, Seykora JT, Lee RA. Renbok phenomenon and contact sensitization in a patient with alopecia universalis. ACTA ACUST UNITED AC 2010; 146:422-5. [PMID: 20404233 DOI: 10.1001/archdermatol.2010.42] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Immune responses are largely regulated by cytokines that are secreted by activated T cells. Interactions among these cells are complex, and the interaction between 2 responses may alter the effect of either response alone. It has been established that contact sensitization-induced inflammation can reverse hair loss due to alopecia areata. In parallel, the Renbök phenomenon demonstrates how 2 distinct autoimmune diseases--psoriasis and alopecia areata--interact to result in clinically active psoriasis suppressing alopecia areata. OBSERVATIONS We describe a patient with concurrent psoriasis and alopecia universalis with terminal hairs within plaques on his extremities, representing the only normal hair growth on his body. Adjacent biopsy specimens confirmed our clinical suspicion of plaque psoriasis with normal hair follicles and alopecia universalis with a peribulbar lymphocytic infiltrate. Our patient's psoriatic plaques cleared rapidly with narrow-band UV-B phototherapy, but hair growth at the site was maintained. His scalp alopecia responded to squaric acid dibutylester contact sensitization therapy. CONCLUSIONS This case represents a natural experiment in which 3 distinct but overlapping immune responses favored psoriasis or contact dermatitis over alopecia areata. The precise mechanism responsible for these effects remains unclear; however, based on recent reports, we speculate that cytokine cross-regulation plays a role in competition among these distinct immune responses.
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Affiliation(s)
- John E Harris
- Department of Dermatology, Hospital of the University of Pennsylvania, 3600 Spruce St, 2 Maloney Bldg, Philadelphia, PA 19104, USA.
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Geusens B, Sanders N, Prow T, Van Gele M, Lambert J. Cutaneous short-interfering RNA therapy. Expert Opin Drug Deliv 2010; 6:1333-49. [PMID: 19941411 DOI: 10.1517/17425240903304032] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Since the 1990s, RNA interference (RNAi) has become a major subject of interest, not only as a tool for biological research, but also, more importantly, as a therapeutic approach for gene-related diseases. The use of short-interfering RNAs (siRNAs) for the sequence-specific knockdown of disease-causing genes has led to numerous preclinical and even a few clinical studies. Applications for cutaneous delivery of therapeutic siRNA are now emerging owing to a strong demand for effective treatments of various cutaneous disorders. Although successful studies have been performed using several different delivery techniques, most of these techniques encounter limitations for translation to the clinic with regards to patient compliance. This review describes the principal findings and applications in cutaneous RNAi therapy and focuses on the promises and pitfalls of the delivery systems.
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Affiliation(s)
- B Geusens
- Ghent University Hospital, Department of Dermatology, De Pintelaan 185, B-9000 Ghent, Belgium.
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Araújo R, Fernandes M, Cavaco-Paulo A, Gomes A. Biology of human hair: know your hair to control it. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2010; 125:121-43. [PMID: 21072698 DOI: 10.1007/10_2010_88] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Hair can be engineered at different levels--its structure and surface--through modification of its constituent molecules, in particular proteins, but also the hair follicle (HF) can be genetically altered, in particular with the advent of siRNA-based applications. General aspects of hair biology are reviewed, as well as the most recent contributions to understanding hair pigmentation and the regulation of hair development. Focus will also be placed on the techniques developed specifically for delivering compounds of varying chemical nature to the HF, indicating methods for genetic/biochemical modulation of HF components for the treatment of hair diseases. Finally, hair fiber structure and chemical characteristics will be discussed as targets for keratin surface functionalization.
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Affiliation(s)
- Rita Araújo
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal
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Impaired synthesis of erythropoietin, glutamine synthetase and metallothionein in the skin of NOD/SCID/gamma(c)(null) and Foxn1 nu/nu mice with misbalanced production of MHC class II complex. Neurochem Res 2009; 35:899-908. [PMID: 19826948 DOI: 10.1007/s11064-009-0074-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2009] [Indexed: 10/20/2022]
Abstract
Most skin pathologies are characterized by unbalanced synthesis of major histocompatability complex II (MHC-II) proteins. Healthy skin keratinocytes simultaneously produce large amounts of MHC-II and regeneration-supporting proteins, e.g. erythropoietin (EPO), EPO receptor (EPOR), glutamine synthetase (GS) and metallothionein (MT). To investigate the level of regeneration-supporting proteins in the skin during misbalanced production of MHC-II, skin sections from nonobese diabetic/severe combined immunodeficient (NOD/SCID)/gamma (c) (null) and or Foxn1 nu/nu mice which are a priory known to under- and over-express MHC II, respectively, were used. Double immunofluorescence analysis of NOD/SCID/gamma (c) (null) skin sections showed striking decrease in expression of MHC-II, EPO, GS and MT. In Foxn1 nu/nu mouse skin, GS was strongly expressed in epidermis and in hair follicles (HF), which lacked EPO. In nude mouse skin EPO and MHC-II were over-expressed in dermal fibroblasts and they were completely absent from cortex, channel, medulla and keratinocytes surrounding the HF, suggest a role for EPO in health and pathology of hair follicle. The level of expression of EPO and GS in both mutant mice was confirmed by results of Western blot analyses. Strong immunoresponsiveness of EPOR in the hair channels of NOD/SCID/gamma (c) (null) mouse skin suggests increased requirements of skin cells for EPO and possible benefits of exogenous EPO application during disorders of immune system accompanied by loss MHC-II in skin cells.
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Abstract
PURPOSE OF REVIEW Alopecia areata is one of the most frequent organ-restricted autoimmune diseases, yet its pathogenesis is still unclear. In addition, although alopecia areata often results in significant psychological distress, effective treatment is lacking. RECENT FINDINGS New potential susceptibility loci have been implicated, but the strongest evidence points to certain class II human leukocyte antigen alleles. There is new evidence for the collapse of hair follicle immune privilege as a key step in the pathogenesis of alopecia areata. There is also new basic science evidence for stress as a contributing factor in the development of alopecia areata. Few treatments for alopecia areata have been well evaluated in randomized trials. SUMMARY Although multiple potential susceptibility loci have been implicated, the genetics of alopecia areata is still unclear. The role of any potential environmental contributors is also unclear. Quality evidence for efficacy of currently used treatments for alopecia areata is lacking.
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Affiliation(s)
- Liborka Kos
- Department of Dermatology, Medical College of Wisconsin/Children's Hospital of Wisconsin, Milwaukee, Wisconsin, USA.
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Current world literature. Curr Opin Pediatr 2009; 21:553-60. [PMID: 19622920 DOI: 10.1097/mop.0b013e3283300b10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Affiliation(s)
- S M Schlauder
- Caris Cohen Dx/Tufts Medical Center: 320 Needham St.Newton, MA, USA
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Sun J, Silva KA, McElwee KJ, King LE, Sundberg JP. The C3H/HeJ mouse and DEBR rat models for alopecia areata: review of preclinical drug screening approaches and results. Exp Dermatol 2009; 17:793-805. [PMID: 18798913 DOI: 10.1111/j.1600-0625.2008.00773.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The C3H/HeJ inbred mouse strain and the Dundee Experimental Bald Rat (DEBR) strain spontaneously develop adult onset alopecia areata (AA), a cell-mediated disease directed against actively growing hair follicles. The low frequency of AA and the inability to predict the stage of AA as it evolves in the naturally occuring C3H/HeJ model of AA can be converted into a highly predictable system by grafting full thickness skin from AA-affected mice to normal haired mice of the same strain. The rat DEBR model develops spontaneous AA at a higher frequency than in the mouse model but they are more expensive to use in drug studies owing to their larger size. Regardless of the shortcomings of either model, these rodent models can be used succesfully to screen novel or approved drugs for efficacy to treat human AA. As the pathogenesis of AA follows the canonical lymphocytic co-stimulatory cascade in the mouse AA model, it can be used to screen compounds potentially useful to treat a variety of cell-mediated diseases. Efficacy of various agents can easily be screened by simply observing the presence, rate, and cosmetic acceptability of hair regrowth. More sophisticated assays can refine how the drugs induce hair regrowth and evaluate the underlying pathogenesis of AA. Some drugs commonly used to treat human AA patients work equally as well in both rodent models validating their usefulness as models for drug efficacy and safety for humanAA.
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Affiliation(s)
- Jing Sun
- The Jackson Laboratory, Bar Harbor, ME 04609-1500, USA
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