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Kishishita J, de Almeida Perez Pimenta C, Cerqueira Macedo DP, Delgado-Charro MB, Bastos Leal L. New Formulation-Microporation Combination Approaches to Delivering Ciclopirox across Human Nails. Pharmaceutics 2024; 16:72. [PMID: 38258083 PMCID: PMC10819317 DOI: 10.3390/pharmaceutics16010072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 12/31/2023] [Accepted: 01/01/2024] [Indexed: 01/24/2024] Open
Abstract
Topical treatments for onychomycosis are of interest to those seeking to avoid systemic drug interactions and to improve systemic safety. This work aimed to develop aqueous-based, simple, and cost-effective vehicles that provide high solubility for ciclopirox and enable the delivery of an active through channels created by nail microporation. Following solubility tests, aqueous gels and thermogels based on hydroxypropylmethylcellulose and poloxamer 407, respectively, were loaded with 8% and 16% ciclopirox. Their performance was then compared to the marketed lacquer Micolamina® in in vitro release tests with artificial membranes and in in vitro permeation tests with human nail clippings with and without poration. Finally, a microbiological assay compared the best gel formulations and the reference product. Little correlation was observed between the in vitro release and the permeation data, and the drug release was highly membrane-dependent. Ciclopirox nail retention in single-dose, porated nails tests was larger than in daily-dosing, non-porated nail conditions. The series of new gel and thermogel vehicles delivered ciclopirox more effectively than Micolamina® in single-dose, porated nail experiments. The inhibition of Trichophyton rubrum activity was significantly increased with microporated nails when the gel formulations were applied but not with Micolamina®. Overall, the results suggest that the new vehicles could be successfully combined with nail microporation to improve the drug delivery and efficacy of topical antifungal medication while reducing the dosing frequency, facilitating patients' adherence.
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Affiliation(s)
- Juliana Kishishita
- Departamento de Ciências Farmacêuticas, Núcleo de Desenvolvimento Farmacêutico e Cosmético (NUDFAC), Universidade Federal de Pernambuco (UFPE), Recife 50740-521, PE, Brazil; (J.K.); (C.d.A.P.P.); (L.B.L.)
| | - Camila de Almeida Perez Pimenta
- Departamento de Ciências Farmacêuticas, Núcleo de Desenvolvimento Farmacêutico e Cosmético (NUDFAC), Universidade Federal de Pernambuco (UFPE), Recife 50740-521, PE, Brazil; (J.K.); (C.d.A.P.P.); (L.B.L.)
| | - Danielle Patricia Cerqueira Macedo
- Departamento de Ciências Farmacêuticas, Laboratório de Análises Microbiológicas (LAM), Universidade Federal de Pernambuco (UFPE), Recife 50740-521, PE, Brazil;
| | | | - Leila Bastos Leal
- Departamento de Ciências Farmacêuticas, Núcleo de Desenvolvimento Farmacêutico e Cosmético (NUDFAC), Universidade Federal de Pernambuco (UFPE), Recife 50740-521, PE, Brazil; (J.K.); (C.d.A.P.P.); (L.B.L.)
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Wu S, Guo W, Li B, Zhou H, Meng H, Sun J, Li R, Guo D, Zhang X, Li R, Qu W. Progress of polymer-based strategies in fungal disease management: Designed for different roles. Front Cell Infect Microbiol 2023; 13:1142029. [PMID: 37033476 PMCID: PMC10073610 DOI: 10.3389/fcimb.2023.1142029] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 02/22/2023] [Indexed: 04/11/2023] Open
Abstract
Fungal diseases have posed a great challenge to global health, but have fewer solutions compared to bacterial and viral infections. Development and application of new treatment modalities for fungi are limited by their inherent essential properties as eukaryotes. The microorganism identification and drug sensitivity analyze are limited by their proliferation rates. Moreover, there are currently no vaccines for prevention. Polymer science and related interdisciplinary technologies have revolutionized the field of fungal disease management. To date, numerous advanced polymer-based systems have been developed for management of fungal diseases, including prevention, diagnosis, treatment and monitoring. In this review, we provide an overview of current needs and advances in polymer-based strategies against fungal diseases. We high light various treatment modalities. Delivery systems of antifungal drugs, systems based on polymers' innate antifungal activities, and photodynamic therapies each follow their own mechanisms and unique design clues. We also discuss various prevention strategies including immunization and antifungal medical devices, and further describe point-of-care testing platforms as futuristic diagnostic and monitoring tools. The broad application of polymer-based strategies for both public and personal health management is prospected and integrated systems have become a promising direction. However, there is a gap between experimental studies and clinical translation. In future, well-designed in vivo trials should be conducted to reveal the underlying mechanisms and explore the efficacy as well as biosafety of polymer-based products.
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Affiliation(s)
- Siyu Wu
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, China
| | - Wenlai Guo
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, China
| | - Bo Li
- Department of Cardiovascular Surgery, The Second Hospital of Jilin University, Changchun, China
| | - Huidong Zhou
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, China
| | - Hongqi Meng
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, China
| | - Junyi Sun
- Changchun American International School, Changchun, China
| | - Ruiyan Li
- Orthpoeadic Medical Center, The Second Hospital of Jilin University, Changchun, China
- Jilin Provincial Key Laboratory of Orhtopeadics, Changchun, China
| | - Deming Guo
- Orthpoeadic Medical Center, The Second Hospital of Jilin University, Changchun, China
- Jilin Provincial Key Laboratory of Orhtopeadics, Changchun, China
| | - Xi Zhang
- Department of Burn Surgery, The First Hospital of Jilin University, Changchun, China
- *Correspondence: Xi Zhang, ; Rui Li, ; Wenrui Qu,
| | - Rui Li
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, China
- *Correspondence: Xi Zhang, ; Rui Li, ; Wenrui Qu,
| | - Wenrui Qu
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, China
- *Correspondence: Xi Zhang, ; Rui Li, ; Wenrui Qu,
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Rahman A, Aqil M, Ahad A, Imam SS, Qadir A, Ali A. Application of central composite design for the optimization of itraconazole loaded nail lacquer formulation. 3 Biotech 2021; 11:324. [PMID: 34194908 DOI: 10.1007/s13205-021-02862-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 05/25/2021] [Indexed: 12/12/2022] Open
Abstract
Onychomycosis is a common fungal infection of the nails that mostly affects the elderly and athletes. Antifungal drug-like itraconazole is one of the therapeutic agents of choice for the topical treatment of onychomycosis. The current work aimed for the preparation and optimization of itraconazole-loaded nail lacquer formulation. Central composite design was employed; independent variables were polymer concentration (X1) and thioglycolic acid (TGA) concentration (X2). While the dependent variables were cumulative amount of drug permeated per unit area (CADP/A, Y1), drying time (Y2) and nonvolatile content (Y3). The optimized formulation was characterized for various parameters including ex-vivo permeation study, confocal laser scanning microscopy (CLSM) and antifungal study. The optimized nail lacquer formulation (F7) exhibited CADP/A of 198.23 µg/cm2, drying time of 185 s and nonvolatile content of 97.23%. The scanning electron microscopy of goat hoof treated with optimized nail lacquer formulation demonstrated loosening of the structure and marked increase in surface roughness. The CLSM micrograph of goat hoof treated with optimized nail lacquer formulation demonstrated that the probe dye was eventually distributed and penetrated through the hoof. Bio-adhesiveness analysis showed that the prepared nail lacquer film has ample adhesiveness to be maintained on the nail plate surface for a sufficient time. In antifungal study, the optimized nail lacquer, and marketed gel exhibited a zone inhibition of 21 mm, and 10 mm against Candida albicans, respectively. The stability study showed that the optimized nail lacquer is stable at storage condition. The prepared nail lacquers have been shown to serve as a useful dosage form for the delivery of itraconazole across nail plate for controlling the problems associated with onychomycosis.
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Souza AMS, Ribeiro RCA, Pinheiro GKLO, Pinheiro FI, Oliveira WN, Souza LBFC, Silva AL, Amaral-Machado L, Alencar ÉN, Chaves GM, Egito EST. Polishing the Therapy of Onychomycosis Induced by Candida spp.: Amphotericin B-Loaded Nail Lacquer. Pharmaceutics 2021; 13:pharmaceutics13060784. [PMID: 34073997 PMCID: PMC8225016 DOI: 10.3390/pharmaceutics13060784] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 11/16/2022] Open
Abstract
Onychomycosis induced by Candida spp. has several limitations regarding its treatment. Nail lacquers display the potential to overcome these drawbacks by providing therapeutic compliance and increasing local drug bioavailability. Thus, this work aimed to produce a nail lacquer loaded with Amphotericin B (AmB) and evaluate its performance. The AmB-loaded nail lacquer was produced and preliminarily characterized. An AmB quantification method was developed. Stability, drug release, permeability and anti-Candida activity assays were conducted. The analytical method validation met the acceptance criteria. The drug loading efficiency was 100% (0.02 mg/g of total product), whereas the AmB stability was limited to ≅7 days (≅90% remaining). The nail lacquer displayed a drying time of 187 s, non-volatile content of around 20%w/w, water-resistance of approximately 2%w/w of weight loss and satisfactory in vitro adhesion. Moreover, the in vitro antifungal activity against different Candida spp. strains was confirmed. The AmB release and the ex vivo permeability studies revealed that AmB leaves the lacquer and permeates the nail matrix in 47.76 ± 0.07% over 24 h. In conclusion, AmB-loaded nail lacquer shows itself as a promising extemporaneous dosage form with remarkable anti-Candida activity related to onychomycosis.
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Affiliation(s)
- Aleph M. S. Souza
- Graduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Norte (UFRN), Natal 59012-570, Brazil; (A.M.S.S.); (L.B.F.C.S.); (G.M.C.)
| | - Renato C. A. Ribeiro
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal 59012-570, Brazil; (R.C.A.R.); (W.N.O.); (L.A.-M.)
| | - Gleyse K. L. O. Pinheiro
- Graduate Program in Biotechnology, School of Health, Potiguar University (UnP)–Laureate International Universities, Natal 59056-000, Brazil; (G.K.L.O.P.); (F.I.P.)
| | - Francisco I. Pinheiro
- Graduate Program in Biotechnology, School of Health, Potiguar University (UnP)–Laureate International Universities, Natal 59056-000, Brazil; (G.K.L.O.P.); (F.I.P.)
| | - Wógenes N. Oliveira
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal 59012-570, Brazil; (R.C.A.R.); (W.N.O.); (L.A.-M.)
| | - Luanda B. F. C. Souza
- Graduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Norte (UFRN), Natal 59012-570, Brazil; (A.M.S.S.); (L.B.F.C.S.); (G.M.C.)
| | - André L. Silva
- Center for Biological Sciences and Health, Federal University of Western Bahia (UFOB), Barreiras 47800-000, Brazil;
| | - Lucas Amaral-Machado
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal 59012-570, Brazil; (R.C.A.R.); (W.N.O.); (L.A.-M.)
| | - Éverton N. Alencar
- Graduate Program in Pharmaceutical Nanotechnology, Federal University of Rio Grande do Norte (UFRN), Natal 59012-570, Brazil;
| | - Guilherme M. Chaves
- Graduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Norte (UFRN), Natal 59012-570, Brazil; (A.M.S.S.); (L.B.F.C.S.); (G.M.C.)
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal 59012-570, Brazil; (R.C.A.R.); (W.N.O.); (L.A.-M.)
| | - Eryvaldo S. T. Egito
- Graduate Program in Pharmaceutical Sciences, Federal University of Rio Grande do Norte (UFRN), Natal 59012-570, Brazil; (A.M.S.S.); (L.B.F.C.S.); (G.M.C.)
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Natal 59012-570, Brazil; (R.C.A.R.); (W.N.O.); (L.A.-M.)
- Graduate Program in Pharmaceutical Nanotechnology, Federal University of Rio Grande do Norte (UFRN), Natal 59012-570, Brazil;
- Correspondence: ; Tel.: +55-(84)-3342–9817
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Aslam R, Hussain T, Yousaf AM, Ghori MU, Khan IU, Rizvi SAA, Shahzad Y. Onychomycosis: Current Understanding and Strategies for Enhancing Drug Delivery into Human Nail Tissue. Curr Drug Res Rev 2021; 13:25-35. [PMID: 32735534 DOI: 10.2174/2589977512666200731171505] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 05/14/2020] [Accepted: 05/18/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Onychomycosis is by far the most common finger or toe nail fungal infectious disease caused by dermatophytes, non-dermatophytic molds or yeast. It accounts for 50% of the total nail disorders, and affects patients physically, socially, and psychologically and can seriously influence their quality of life. OBJECTIVES Oral antifungals are routinely used to treat the nail fungal disease; however oral therapy is associated with severe side effects and longer treatment times. In recent years, drug delivery directly into the nail or nail bed has gained attention and various topical products have been tested that can cure the disease when applied topically or transungually. Nevertheless, drug penetration into and through the nail is not straightforward and requires chemicals to improve its permeability or by applying physical stress to promote drug penetration into and through the nail. This lucid review presents an overview of various causes of onychomycosis, current therapeutic approaches, and efforts aimed at increasing the permeability of nails through various strategies such as chemical, physical and mechanical methods for permeation enhancement. CONCLUSION Various strategies have been proposed for the treatment of onychomycosis, however, much research into a more precise and effective therapy is still required.
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Affiliation(s)
- Rabia Aslam
- Faculty of Pharmacy, University of Central Punjab, Lahore, Pakistan
| | - Talib Hussain
- Department of Pharmacy, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Abid Mehmood Yousaf
- Department of Pharmacy, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Muhammad U Ghori
- Department of Pharmacy, School of Applied Sciences, University of Huddersfield, Huddersfield, United Kingdom
| | - Ikram U Khan
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Syed A A Rizvi
- Department of Pharmaceutical Sciences, Hampton University School of Pharmacy, Hampton University, VA, United States
| | - Yasser Shahzad
- Department of Pharmacy, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
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Yang F, Yu X, Shao W, Guo P, Cao S, Wang M, Wang Y, Wu C, Xu Y. Co-delivery of terbinafine hydrochloride and urea with an in situ film-forming system for nail targeting treatment. Int J Pharm 2020; 585:119497. [PMID: 32504773 DOI: 10.1016/j.ijpharm.2020.119497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 05/20/2020] [Accepted: 05/31/2020] [Indexed: 10/24/2022]
Abstract
Onychomycosis is a chronic nail disorder consisting of a fungal infection that causes physical and psychosocial discomfort to patients. However, its treatment remains challenging owing to the barrier of the highly keratinized nail plate and the short time that conventional formulations reside on nails. In this work, we developed an in situ film-forming system(IFFS) based on Eudragit® RLPO to co-deliver terbinafine hydrochloride (TBH) and urea, i.e., TBH-urea-RLPO IFFS, with the aim of overcoming the nail barrier, prolonging the residence time, and efficiently treating onychomycosis. The IFFS formulation formed a thin film with good appearance and adhesion upon application in situ. The physical states of TBH and urea in the film were evaluated with polarization microscopy and powder X-ray diffraction. TBH and urea were both amorphousmiscible components within the RLPO film. TBH release from TBH-urea-RLPO IFFS fitted to the Korsmeyer-Pappas model, and the cumulative release at 72 h was significantly higher than that from commercial preparations (Lamisil Pedisan® once). In vitro permeation of TBH from TBH-urea-RLPO IFFS through bovine hoof membranes was evaluated in comparison with the film containing TBH alone (TBH-RLPO) and commercial preparations. The retention and cumulative permeated amount of TBH were significantly enhanced for the TBH-urea-RLPO IFFS (170.80 ± 44.63 μg/cm2vs 75.49 ± 21.50 μg/cm2vs 60.25 ± 27.38 μg/cm2; 61.81 ± 16.09 μg/cm2vs 21.80 ± 11.56 μg/cm2vs 7.91 ± 1.03 μg/cm2, respectively), and the membranes treated with different formulations were observed with SEM and FTIR to identify the denaturing effect of urea on bovine hoof keratin. In vitro antifungal tests against Trichophyton rubrum,Microsporum canis, Fusarium, and Aspergillus fumigatus were cultured on Muller-Hinton agar; the findings indicated that TBH-urea-RLPO IFFS enhanced TBH antifungal activity. Overall, the results support that TBH-urea-RLPO IFFS is an efficient and promising approach for onychomycosis targeting treatment.
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Affiliation(s)
- Fengdie Yang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Xiuming Yu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Weiyan Shao
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Penghao Guo
- Department of Clinical Laboratory, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Sisi Cao
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Meng Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Yixuan Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Chuanbin Wu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Yuehong Xu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
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Vikas A, Rashmin P, Mrunali P, Chavan RB, Kaushik T. Mechanistic Insights of Formulation Approaches for the Treatment of Nail Infection: Conventional and Novel Drug Delivery Approaches. AAPS PharmSciTech 2020; 21:67. [PMID: 31938980 DOI: 10.1208/s12249-019-1591-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 11/25/2019] [Indexed: 02/07/2023] Open
Abstract
Onychomycosis is a chronic disorder that is difficult to manage and hard to eradicate with perilous trends to relapse. Due to increased prevalence of HIV, use of immunosuppressant drugs and lifestyle-related factors, population affected with fungal infection of nail (Onychomycosis) happens to increase extensively in last two decades. Modalities available for the treatment of onychomycosis include systemically administered antifungals, mechanical procedures, and topical drug therapy. But the efficacy of the most of approaches to deliver drug at targeted site, i.e., deep-seated infected nail bed is limited due to compact and highly keratinized nail structure. A series of advanced formulation approaches, such as transfersomes, liposomes, nano/micro emulsion, nail lacquers etc., have been attempted to improve the drug penetration into nail plate more efficiently. The manuscript reviews these formulation approaches with their possible mechanisms by which they improve the drug penetration.Comparative analysis of available treatment modalities for onychomycosis has been provided with pros and cons of each alternatives. Additionally, ongoing research about the application of biological materials such as modified cationic antimicrobial peptides (AMPs), plant-derived proteins, and synthetic antimicrobial peptidomimetics have also been explored.
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Dhamoon RK, Popli H, Gupta M. Novel Drug Delivery Strategies for the Treatment of Onychomycosis. Pharm Nanotechnol 2019; 7:24-38. [PMID: 31092174 PMCID: PMC6691844 DOI: 10.2174/2211738507666190228104031] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 02/06/2019] [Accepted: 02/15/2019] [Indexed: 02/06/2023]
Abstract
Onychomycosis accounts for 50% of all nail disease cases and is commonly caused by dermatophytes. It was primarily considered a cosmetic problem but has been garnering attention lately due to its persistent nature and difficult treatment with relapses. With prolonged treatment duration and high cost involved in treating onychomycosis, several attempts have been made in overcoming the rigid nail barrier. The conventional treatment of onychomy-cosis involves oral and topical therapy. The oral antifungal agents though quite effective, are hepato-toxic and cause drug-drug interactions. Topical therapy is more patient compliant being devoid of such adverse effects but it suffers from another setback of improper nail penetration. Amorolfine and ciclopirox nail lacquers are popular market products. Since decades, efforts have been made to enhance topical delivery for efficiently treating ony-chomycosis. Mechanical, physical and chemical methods have been em-ployed. Despite all the attempts made, the nail delivery issues are far from be-ing solved. Recently, the focus has shifted to novel drug delivery systems like nanoparticles, microemulsions, polymeric films and nail lacquers for en-hanced drug permeation and localized therapy. The research around the world is exploring their potential as effective treatment options. This review intends to further explore the novel delivery strategies to treat a persistent fungal in-fection like onychomycosis.
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Affiliation(s)
- Rupinder K Dhamoon
- Department of Pharmaceutics, Delhi Pharmaceutical Sciences and Research University, Pushp Vihar, Sector-3, M.B Road, New Delhi -110017, India
| | - Harvinder Popli
- Department of Pharmaceutics, Delhi Pharmaceutical Sciences and Research University, Pushp Vihar, Sector-3, M.B Road, New Delhi -110017, India
| | - Madhu Gupta
- Department of Pharmaceutics, Delhi Pharmaceutical Sciences and Research University, Pushp Vihar, Sector-3, M.B Road, New Delhi -110017, India
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Evaluation of the promoting effect of soluble cyclodextrins in drug nail penetration. Eur J Pharm Sci 2018; 117:270-278. [DOI: 10.1016/j.ejps.2018.02.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/22/2018] [Accepted: 02/26/2018] [Indexed: 12/17/2022]
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