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Xu Y, Bei Z, Li M, Qiu K, Ren J, Chu B, Zhao Y, Qian Z. Biomaterials for non-invasive trans-tympanic drug delivery: requirements, recent advances and perspectives. J Mater Chem B 2024; 12:7787-7813. [PMID: 39044544 DOI: 10.1039/d4tb00676c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
Various non-invasive delivery systems have recently been developed as an alternative to conventional injections. Local transdermal administration represents the most attractive method due to the low systemic side effects, excellent ease of administration, and persistent drug release. The tympanic membrane (TM), a major barrier between the outer and middle ear, has a similar structure of the stratum corneum compared to the surface of the skin. After several attempts, non-invasive trans-tympanic drug delivery has been regarded as a promising option in the treatment of middle and inner ear diseases. The round window membrane (RWM) was a possible non-invasive delivery approach from the middle to inner ear. The improved permeability of nanocarriers crossing the RWM is a current hotspot in therapeutics for inner ear diseases. In this review, we include the latest studies exploring non-invasive trans-tympanic delivery to treat middle and inner ear diseases. Both passive and active delivery systems are described. A summary of the benefits and disadvantages of various delivery systems in clinical practice and production procedures is introduced. Finally, future possible approaches for its effective application as a non-invasive middle and inner ear drug delivery system are characterised.
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Affiliation(s)
- Yang Xu
- Department of Otorhinolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
| | - Zhongwu Bei
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
| | - Mei Li
- Department of Otorhinolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Ke Qiu
- Department of Otorhinolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Jianjun Ren
- Department of Otorhinolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Bingyang Chu
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
| | - Yu Zhao
- Department of Otorhinolaryngology-Head & Neck Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Zhiyong Qian
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
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Goswami A, Ruhina Rahman SN, Ponneganti S, Gangipangi V, Vavialala H, Radhakrishnanand P, Selvaraju S, Mutheneni SR, Bharti S, Shunmugaperumal T. Intratympanic injections of emulsion-like dispersions to augment cinnarizine amount in a healthy rabbit inner ear model. Nanomedicine (Lond) 2024:1-25. [PMID: 39041668 DOI: 10.1080/17435889.2024.2373042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 06/24/2024] [Indexed: 07/24/2024] Open
Abstract
Aim: To investigate eutectic liquid-based emulsion-like dispersions for intratympanic injections to augment cinnarizine permeability across round window membrane in a healthy rabbit inner ear model. Methods: Two-tier systematic optimization was used to get the injection formula. The drug concentrations in perilymph and plasma were analyzed via. Ultra-performance liquid chromatography-tandem mass spectrometry method after 30-, 60-, 90- and 120-min post intratympanic injection time points in rabbits. Results: A shear-thinning behavior, immediate drug release (∼98.80%, 10 min) and higher cell viability (>97.86%, 24 h) were observed in dispersions. The cinnarizine level of 8168.57 ± 1236.79 ng/ml was observed in perilymph at 30 min post intratympanic injection in rabbits. Conclusion: The emulsion-like dispersions can augment drug permeability through round window membrane.
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Affiliation(s)
- Abhinab Goswami
- Department of Pharmaceutics, National Institute of Pharmaceutical Education & Research- Guwahati, Sila Katamur (Halugurisuk), Changsari, Kamrup, Assam 781101, India
| | - Syed Nazrin Ruhina Rahman
- Department of Pharmaceutics, National Institute of Pharmaceutical Education & Research- Guwahati, Sila Katamur (Halugurisuk), Changsari, Kamrup, Assam 781101, India
| | - Srikanth Ponneganti
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education & Research- Guwahati, Sila Katamur (Halugurisuk), Changsari, Kamrup, Assam 781101, India
| | - Vijayakumar Gangipangi
- Department of Biotechnology, National Institute of Pharmaceutical Education & Research- Guwahati, Sila Katamur (Halugurisuk), Changsari, Kamrup, Assam 781101, India
| | - Hariprasad Vavialala
- Bioinformatics Group, Applied Biology Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad, Telangana 500007, India
| | - Pullapanthula Radhakrishnanand
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education & Research- Guwahati, Sila Katamur (Halugurisuk), Changsari, Kamrup, Assam 781101, India
| | - Sudhagar Selvaraju
- Department of Biotechnology, National Institute of Pharmaceutical Education & Research- Guwahati, Sila Katamur (Halugurisuk), Changsari, Kamrup, Assam 781101, India
| | - Srinivasa Rao Mutheneni
- Bioinformatics Group, Applied Biology Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad, Telangana 500007, India
| | - Shreekant Bharti
- Department of Pathology/Lab Medicine, All India Institute of Medical Sciences Patna, Phulwarisarif, Patna, Bihar 801507, India
| | - Tamilvanan Shunmugaperumal
- Department of Pharmaceutics, National Institute of Pharmaceutical Education & Research- Guwahati, Sila Katamur (Halugurisuk), Changsari, Kamrup, Assam 781101, India
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Nguyen TN, Park JS. Intratympanic drug delivery systems to treat inner ear impairments. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2022. [DOI: 10.1007/s40005-022-00586-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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An X, Wang R, Chen E, Yang Y, Fan B, Li Y, Han B, Li Q, Liu Z, Han Y, Chen J, Zha D. A forskolin-loaded nanodelivery system prevents noise-induced hearing loss. J Control Release 2022; 348:148-157. [PMID: 35659555 DOI: 10.1016/j.jconrel.2022.05.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 05/23/2022] [Accepted: 05/28/2022] [Indexed: 10/18/2022]
Abstract
Hearing loss is the most common sensory disorder worldwide and may result from age, drugs, or exposure to excessive noise. Crossing the blood-labyrinth barrier to achieve targeted drug delivery to the inner ear is key to the treatment of hearing loss. We designed a nanoparticle (NP)-based system for targeted drug delivery of forskolin (FSK) to the inner ear, driven by the prestin-targeting peptide LS19 ("ligand-receptor type interaction"). In vivo experiments in developing zebrafish embryos (4-96 h past fertilization) and mice confirmed that LS19-FSK specifically targeted and accumulated in zebrafish lateral line neuromasts and mouse outer hair cells (OHCs). LS19 peptide modification enabled LS19-FSK-NPs to rapidly target OHCs with high specificity. Furthermore, the multifunctional LS19-FSK-NPs were successfully delivered to the OHCs via the round window membrane route and exhibited slow-release properties. The sustained release and intracellular accumulation of FSK inhibited apoptosis of OHCs. Compared with LS19-NPs and FSK-NPs, LS19-FSK-NPs provided significantly stronger protection against noise-induced hearing damage, based on auditory brainstem responses at 4, 8, 16, and 32 kHz. Thus, our specially designed targeted nano-delivery system may serve as a basis for future clinical applications and treatment platforms and has the potential to significantly improve the treatment results of many inner ear diseases.
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Affiliation(s)
- Xiaogang An
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Renfeng Wang
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Erfang Chen
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Yang Yang
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Bei Fan
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Yao Li
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Bang Han
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Qiong Li
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Zhenzhen Liu
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Yu Han
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China
| | - Jun Chen
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China.
| | - Dingjun Zha
- Department of Otolaryngology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi Province, China.
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Luo J, Lin X, Li L, Tan J, Li P. β-Cyclodextrin and Oligoarginine Peptide-Based Dendrimer-Entrapped Gold Nanoparticles for Improving Drug Delivery to the Inner Ear. Front Bioeng Biotechnol 2022; 10:844177. [PMID: 35480970 PMCID: PMC9038081 DOI: 10.3389/fbioe.2022.844177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Accepted: 02/24/2022] [Indexed: 11/13/2022] Open
Abstract
Here, we developed a safe and highly effective nanocarrier using β-cyclodextrin (β-CD) and oligoarginine peptide (Arg8)-modified dendrimer-entrapped gold nanoparticles (Au@CD-PAMAM-Arg8), with a diameter of 5 nm, for improved delivery of dexamethasone (Dex) to the inner ear. The properties and in vivo distribution of the Au@CD-PAMAM-Arg8 were assessed in vitro, and a streptomycin (SM) ototoxicity model was used in vivo. Flow cytometry analysis of HEIOC1 cells treated with Au@CD-PAMAM-Arg8 and Au @CD-PAMAM at different time intervals indicated that cell uptake efficiency of the drug delivery carrier Au@CD-PAMAM-Arg8 was higher than that of Au @CD-PAMAM. Au@CD-PAMAM-Arg8 carrying Dex (Au@CD-PAMAM-Arg8/Dex) were mainly distributed in hair cells, the spiral ganglion, lateral wall, and nerve fibers and had stronger protective effects on the inner ear than Dex administration alone. In vivo tracer tests revealed that tympanic injection was significantly more effective than posterior ear injection, muscle injection, and tail vein injection, whereas clinical retro-auricular injection could not increase the efficiency of drug delivery into the ear. Electrocochleography results showed that Au@CD-PAMAM-Arg8/Dex significantly improved hearing in C57/BL6 mice after SM exposure. These findings indicate that Au@CD-PAMAM-Arg8 may be the useful drug carriers for the treatment of inner ear diseases.
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Affiliation(s)
- Jia Luo
- Department of Otolaryngology Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - XueXin Lin
- Department of Otolaryngology Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - LiLing Li
- Department of Otolaryngology Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - JingQian Tan
- Department of Otolaryngology Head and Neck Surgery, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, China
| | - Peng Li
- Department of Otolaryngology Head and Neck Surgery, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
- *Correspondence: Peng Li,
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Mustfa SA, Maurizi E, McGrath J, Chiappini C. Nanomedicine Approaches to Negotiate Local Biobarriers for Topical Drug Delivery. ADVANCED THERAPEUTICS 2021. [DOI: 10.1002/adtp.202000160] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Salman Ahmad Mustfa
- Centre for Craniofacial and Regenerative Biology King's College London London SE1 9RT UK
| | - Eleonora Maurizi
- Dipartimento di Medicina e Chirurgia Università di Parma Parma 43121 Italy
| | - John McGrath
- St John's Institute of Dermatology King's College London London SE1 9RT UK
| | - Ciro Chiappini
- Centre for Craniofacial and Regenerative Biology King's College London London SE1 9RT UK
- London Centre for Nanotechnology King's College London London WC2R 2LS UK
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7
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Nanocarriers for drug delivery to the inner ear: Physicochemical key parameters, biodistribution, safety and efficacy. Int J Pharm 2020; 592:120038. [PMID: 33159985 DOI: 10.1016/j.ijpharm.2020.120038] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/27/2020] [Accepted: 10/28/2020] [Indexed: 12/26/2022]
Abstract
Despite the high incidence of inner ear disorders, there are still no dedicated medications on the market. Drugs are currently administered by the intratympanic route, the safest way to maximize drug concentration in the inner ear. Nevertheless, therapeutic doses are ensured for only a few minutes/hours using drug solutions or suspensions. The passage through the middle ear barrier strongly depends on drug physicochemical characteristics. For the past 15 years, drug encapsulation into nanocarriers has been developed to overcome this drawback. Nanocarriers are well known to sustain drug release and protect it from degradation. In this review, in vivo studies are detailed concerning nanocarrier biodistribution, their pathway mechanisms in the inner ear and the resulting drug pharmacokinetics. Key parameters influencing nanocarrier biodistribution are identified and discussed: nanocarrier size, concentration, surface composition and shape. Recent advanced strategies that combine nanocarriers with hydrogels, specific tissue targeting or modification of the round window permeability (cell-penetrating peptide, magnetic delivery) are explored. Most of the nanocarriers appear to be safe for the inner ear and provide a significant efficacy over classic formulations in animal models. However, many challenges remain to be overcome for future clinical applications.
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An X, Zha D. Development of nanoparticle drug-delivery systems for the inner ear. Nanomedicine (Lond) 2020; 15:1981-1993. [PMID: 32605499 DOI: 10.2217/nnm-2020-0198] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Hearing loss has become the most common sensory nerve disorder worldwide, with no effective treatment strategy. Low-permeability and limited blood supply to the blood-labyrinth barrier limit the effective delivery and efficacy of therapeutic drugs in the inner ear. Nanoparticle (NP)-based drugs have shown benefits of stable controlled release and functional surface modification, and NP-based delivery systems have become a research hotspot. In this review, we discuss the development of new targeted drug-delivery systems based on the biocompatibility and safety of different NPs in the cochlea, as well as the advantages and disadvantages of their prescription methods and approaches. We believe that targeted NP-based drug-delivery systems will be effective treatments for hearing loss.
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Affiliation(s)
- Xiaogang An
- Department of Otolaryngology - Head & Neck Surgery, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, Shaanxi Province, 710032, PR China
| | - Dingjun Zha
- Department of Otolaryngology - Head & Neck Surgery, Xijing Hospital, Fourth Military Medical University, 127 Changle Western Road, Xi'an, Shaanxi Province, 710032, PR China
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Rathnam C, Chueng STD, Ying YLM, Lee KB, Kwan K. Developments in Bio-Inspired Nanomaterials for Therapeutic Delivery to Treat Hearing Loss. Front Cell Neurosci 2019; 13:493. [PMID: 31780898 PMCID: PMC6851168 DOI: 10.3389/fncel.2019.00493] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 10/21/2019] [Indexed: 01/10/2023] Open
Abstract
Sensorineural hearing loss affects millions of people worldwide and is a growing concern in the aging population. Treatment using aminoglycoside antibiotics for infection and exposure to loud sounds contribute to the degeneration of cochlear hair cells and spiral ganglion neurons. Cell loss impacts cochlear function and causes hearing loss in ∼ 15% of adult Americans (∼36 million). The number of individuals with hearing loss will likely grow with increasing lifespans. Current prosthesis such as hearing aids and cochlear implants can ameliorate hearing loss. However, hearing aids are ineffective if hair cells or spiral ganglion neurons are severely damaged, and cochlear implants are ineffective without properly functioning spiral ganglion neurons. As such, strategies that alleviate hearing loss by preventing degeneration or promoting cell replacement are urgently needed. Despite showing great promise from in vitro studies, the complexity and delicate nature of the inner ear poses a huge challenge for delivering therapeutics. To mitigate risks and complications associated with surgery, new technologies and methodologies have emerged for efficient delivery of therapeutics. We will focus on biomaterials that allow controlled and local drug delivery into the inner ear. The rapid development of microsurgical techniques in conjunction with novel bio- and nanomaterials for sustained drug delivery appears bright for hearing loss treatment.
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Affiliation(s)
- Christopher Rathnam
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ, United States
| | - Sy-Tsong Dean Chueng
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ, United States
| | - Yu-Lan Mary Ying
- Department of Otolaryngology Head and Neck Surgery, Rutgers New Jersey Medical School, Newark, NJ, United States
| | - Ki-Bum Lee
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ, United States.,Stem Cell Research Center and Keck Center for Collaborative Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ, United States
| | - Kelvin Kwan
- Stem Cell Research Center and Keck Center for Collaborative Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ, United States.,Department of Cell Biology and Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ, United States
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Wang X, Chen Y, Tao Y, Gao Y, Yu D, Wu H. A666-conjugated nanoparticles target prestin of outer hair cells preventing cisplatin-induced hearing loss. Int J Nanomedicine 2018; 13:7517-7531. [PMID: 30532536 PMCID: PMC6241721 DOI: 10.2147/ijn.s170130] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Background The delivery of treatment agents to inner ear with drug delivery system (DDS) has been under investigation to overcome the limitations of the conventional therapeutic agents in curing or alleviating the cisplatin ototoxicity. Methods In the present study, a novel targeted dexamethasone (DEX)-loaded DDS, A666-DEX-NP, was constructed for prevention from cisplatin-induced hearing loss. A666-(CLEPRWGFGWWLH) peptides specifically bind to prestin, which is limited to the outer hair cells (OHCs). HEI-OC1 and cisplatin-treated guinea pigs (12 mg/kg, intraperitoneal) were used as in vitro and in vivo models for investigating the targeting and protective efficiency against cisplatin. Results As expected, compared to A666-unconjugated nanoparticles (NP), A666-conjugated coumarin 6-labeled NP showed active targeting to OHCs. Furthermore, A666-coumarin 6-labeled NP could be significantly internalized by HEI-OC1 cells via the A666-prestin interaction. This facilitated the uptake of cells pretreated with A666-DEX-NP, followed by the cisplatin-treated group, which led to enhanced cell viability, reduced apoptotic properties, and decreased reactive oxygen species levels as compared to cells pretreated with DEX or DEX-NP, 4 hours in advance of cisplatin treatment. In cisplatin-treated guinea pigs, pretreatment with A666-DEX-NP effectively preserved OHCs and showed significant hearing protection at 4, 8, and 16 kHz as compared to pretreatment with saline, DEX, or DEX-NP formulation. Conclusion This OHC-targeting DDS provides a novel strategy for DEX application that can be potentially used to combat cisplatin ototoxicity.
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Affiliation(s)
- Xueling Wang
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Ear Institute, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, People's Republic of China, ;
| | - Yuming Chen
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Ear Institute, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, People's Republic of China, ;
| | - Yong Tao
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Ear Institute, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, People's Republic of China, ;
| | - Yunge Gao
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Ear Institute, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, People's Republic of China, ;
| | - Dehong Yu
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Ear Institute, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, People's Republic of China, ;
| | - Hao Wu
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Ear Institute, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China, ; .,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, People's Republic of China, ;
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Musazzi UM, Franzé S, Cilurzo F. Innovative pharmaceutical approaches for the management of inner ear disorders. Drug Deliv Transl Res 2018; 8:436-449. [PMID: 28462501 DOI: 10.1007/s13346-017-0384-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The sense of hearing is essential for permitting human beings to interact with the environment, and its dysfunctions can strongly impact on the quality of life. In this context, the cochlea plays a fundamental role in the transformation of the airborne sound waves into electrical signals, which can be processed by the brain. However, several diseases and external stimuli (e.g., noise, drugs) can damage the sensorineural structures of cochlea, inducing progressive hearing dysfunctions until deafness. In clinical practice, the current pharmacological approaches to treat cochlear diseases are based on the almost exclusive use of systemic steroids. In the last decades, the efficacy of novel therapeutic molecules has been proven, taking advantage from a better comprehension of the pathological mechanisms underlying many cochlear diseases. In addition, the feasibility of intratympanic administration of drugs also permitted to overcome the pharmacokinetic limitations of the systemic drug administration, opening new frontiers in drug delivery to cochlea. Several innovative drug delivery systems, such as in situ gelling systems or nanocarriers, were designed, and their efficacy has been proven in vitro and in vivo in cochlear models. The current review aims to describe the art of state in the cochlear drug delivery, highlighting lights and shadows and discussing the most critical aspects still pending in the field.
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Affiliation(s)
- Umberto M Musazzi
- Department of Pharmaceutical Sciences, Università degli Studi di Milano, Via G. Colombo, 71, 20133, Milan, Italy.
| | - Silvia Franzé
- Department of Pharmaceutical Sciences, Università degli Studi di Milano, Via G. Colombo, 71, 20133, Milan, Italy
| | - Francesco Cilurzo
- Department of Pharmaceutical Sciences, Università degli Studi di Milano, Via G. Colombo, 71, 20133, Milan, Italy
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12
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Liu X, Li M, Smyth H, Zhang F. Otic drug delivery systems: formulation principles and recent developments. Drug Dev Ind Pharm 2018; 44:1395-1408. [PMID: 29659300 DOI: 10.1080/03639045.2018.1464022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Disorders of the ear severely impact the quality of life of millions of people, but the treatment of these disorders is an ongoing, but often overlooked challenge particularly in terms of formulation design and product development. The prevalence of ear disorders has spurred significant efforts to develop new therapeutic agents, but perhaps less innovation has been applied to new drug delivery systems to improve the efficacy of ear disease treatments. This review provides a brief overview of physiology, major diseases, and current therapies used via the otic route of administration. The primary focuses are on the various administration routes and their formulation principles. The article also presents recent advances in otic drug deliveries as well as potential limitations. Otic drug delivery technology will likely evolve in the next decade and more efficient or specific treatments for ear disease will arise from the development of less invasive drug delivery methods, safe and highly controlled drug delivery systems, and biotechnology targeting therapies.
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Affiliation(s)
- Xu Liu
- a College of Pharmacy , The University of Texas at Austin , Austin , TX , USA
| | - Mingshuang Li
- b Department of Communication Sciences and Disorders , The University of Texas at Austin , Austin , TX , USA
| | - Hugh Smyth
- a College of Pharmacy , The University of Texas at Austin , Austin , TX , USA
| | - Feng Zhang
- a College of Pharmacy , The University of Texas at Austin , Austin , TX , USA
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13
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Optimized phospholipid-based nanoparticles for inner ear drug delivery and therapy. Biomaterials 2018; 171:133-143. [PMID: 29689410 DOI: 10.1016/j.biomaterials.2018.04.038] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 03/26/2018] [Accepted: 04/14/2018] [Indexed: 12/26/2022]
Abstract
To develop efficient carriers for inner ear drug delivery, we prepared four kinds of phospholipid-based nanoparticles: neutral, anionic, cationic, and cationic-PEG (polyethyleneglycol) particles. PEG was used to maintain long-term particle circulation in the perilymph, avoiding non-specific binding of particles to proteins. All four nanoparticles were about 200 nm in diameter, and their zeta potentials were -4.32, -26.0, +25.8, and -0.28, respectively, for neutral, anionic, cationic, and cationic-PEG nanoparticles. To test particle efficacy in vitro, we used an artificial mucosa 100 μm in thickness to model the round window membrane (RWM) and HEI-OC1 cells, which were treated with particles containing Nile Red dye. Based on the levels of particle penetration and cellular uptake in this model system, we selected an optimal particle for further study. We also observed the movement of particles in ex vivo organotypic cultures of the organ of Corti. In mice, we analyzed the biodistribution of dexamethasone (Dex) in the inner ear after intratympanic injection of Dex-loaded nanoparticles. Then, we tested the therapeutic utility of the Dex-loaded nanoparticles in a mouse model of ototoxicity. In the auditory brainstem response (ABR) test, particle provided improved hearing loss recovery at all tested frequencies, more so than did the Dex sodium phosphate (Dex-SP) solution in current clinical use. Furthermore, quantitative PCR showed that nanoparticles reduced the levels of pro-inflammatory cytokines, exhibiting anti-inflammatory effects superior to those of Dex-SP. Thus, the surface properties of nanoparticles play pivotal roles in particle penetration and distribution after intratympanic injection. Our in vitro screening system using an artificial mucosa will also be valuable in the development of carriers for inner ear drug delivery.
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Mäder K, Lehner E, Liebau A, Plontke SK. Controlled drug release to the inner ear: Concepts, materials, mechanisms, and performance. Hear Res 2018; 368:49-66. [PMID: 29576310 DOI: 10.1016/j.heares.2018.03.006] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 02/21/2018] [Accepted: 03/06/2018] [Indexed: 12/01/2022]
Abstract
Progress in drug delivery to the ear has been achieved over the last few years. This review illustrates the main mechanisms of controlled drug release and the resulting geometry- and size-dependent release kinetics. The potency, physicochemical properties, and stability of the drug molecules are key parameters for designing the most suitable drug delivery system. The most important drug delivery systems for the inner ear include solid foams, hydrogels, and different nanoscale drug delivery systems (e.g., nanoparticles, liposomes, lipid nanocapsules, polymersomes). Their main characteristics (i.e., general structure and materials) are discussed, with special attention given to underlining the link between the physicochemical properties (e.g., surface areas, glass transition temperature, microviscosity, size, and shape) and release kinetics. An appropriate characterization of the drug, the excipients used, and the formulated drug delivery systems is necessary to achieve a deeper understanding of the release process and decrease variability originating from the drug delivery system. This task cannot be solved by otologists alone. The interdisciplinary cooperation between otology/neurotology, pharmaceutics, physics, and other disciplines will result in improved drug delivery systems for the inner ear.
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Affiliation(s)
- Karsten Mäder
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, D-06120 Halle (Saale), Germany.
| | - Eric Lehner
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, D-06120 Halle (Saale), Germany
| | - Arne Liebau
- Department of Otorhinolaryngology, Head & Neck Surgery, Martin Luther University Halle-Wittenberg, University Medicine Halle, Ernst-Grube-Str. 40, 06120 Halle (Saale), Germany
| | - Stefan K Plontke
- Department of Otorhinolaryngology, Head & Neck Surgery, Martin Luther University Halle-Wittenberg, University Medicine Halle, Ernst-Grube-Str. 40, 06120 Halle (Saale), Germany
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Valente F, Astolfi L, Simoni E, Danti S, Franceschini V, Chicca M, Martini A. Nanoparticle drug delivery systems for inner ear therapy: An overview. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2017.03.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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16
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Park CW, Yang HM, Seo BK, Kim JD. Morphology transition of self-aggregates of poly(amino acid)-drug conjugates. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.04.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Zhang Y, Su H, Wen L, Yang F, Chen G. Mathematical modeling for local trans-round window membrane drug transport in the inner ear. Drug Deliv 2016; 23:3082-3087. [PMID: 26934165 DOI: 10.3109/10717544.2016.1149745] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The structure and composition of the round window membrane (RWM) make it a particularly effective pathway for drug delivery to the inner ear. Therefore, predicting the efficiency of RWM transport would provide useful information for enhancing local application. In the present study, a mathematical model was established to achieve this goal. A series of drugs with different physicochemical properties were introduced in the inner ear cavity of guinea pigs via RWM by intratympanic application. The perilymphatic drug concentration (C) data were used to calculate the permeability coefficient (Kp) of different drugs diffusing through the RWM. The experimental data were fitted using the Matlab software to set up the numerical model based on Fick's diffusion law and the single-compartment model following extravascular administration, which facilitated the prediction of the permeation profiles of different drugs while trans-RWM. In summary, this mathematical model is a contribution toward developing potentially useful RWM administration simulating tools.
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Affiliation(s)
- Yue Zhang
- a School of Pharmacy, Guangdong Pharmaceutical University , Guangzhou , China
| | - Huanpeng Su
- a School of Pharmacy, Guangdong Pharmaceutical University , Guangzhou , China
| | - Lu Wen
- a School of Pharmacy, Guangdong Pharmaceutical University , Guangzhou , China
| | - Fan Yang
- a School of Pharmacy, Guangdong Pharmaceutical University , Guangzhou , China
| | - Gang Chen
- a School of Pharmacy, Guangdong Pharmaceutical University , Guangzhou , China
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Recent advances in local drug delivery to the inner ear. Int J Pharm 2015; 494:83-101. [PMID: 26260230 DOI: 10.1016/j.ijpharm.2015.08.015] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 07/31/2015] [Accepted: 08/05/2015] [Indexed: 12/14/2022]
Abstract
Inner ear diseases are not adequately treated by systemic drug administration mainly because of the blood-perilymph barrier that reduces exchanges between plasma and inner ear fluids. Local drug delivery methods including intratympanic and intracochlear administrations are currently developed to treat inner ear disorders more efficiently. Intratympanic administration is minimally invasive but relies on diffusion through middle ear barriers for drug entry into the cochlea, whereas intracochlear administration offers direct access to the colchlea but is rather invasive. A wide range of drug delivery systems or devices were evaluated in research and clinic over the last decade for inner ear applications. In this review, different strategies including medical devices, hydrogels and nanoparticulate systems for intratympanic administration, and cochlear implant coating or advanced medical devices for intracoclear administration were explored with special attention to in vivo studies. This review highlights the promising systems for future clinical applications as well as the current hurdles that remain to be overcome for efficient inner ear therapy.
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