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Qing Y, Ono T, Kohara Y, Watanabe A, Ogiso N, Ito M, Nakashima T, Takeshita S. Emilin2 marks the target region for mesenchymal cell accumulation in bone regeneration. Inflamm Regen 2024; 44:27. [PMID: 38831448 PMCID: PMC11145771 DOI: 10.1186/s41232-024-00341-6] [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: 02/14/2024] [Accepted: 05/23/2024] [Indexed: 06/05/2024] Open
Abstract
BACKGROUND Regeneration of injured tissue is dependent on stem/progenitor cells, which can undergo proliferation and maturation processes to replace the lost cells and extracellular matrix (ECM). Bone has a higher regenerative capacity than other tissues, with abundant mesenchymal progenitor cells in the bone marrow, periosteum, and surrounding muscle. However, the treatment of bone fractures is not always successful; a marked number of clinical case reports have described nonunion or delayed healing for various reasons. Supplementation of exogenous stem cells by stem cell therapy is anticipated to improve treatment outcomes; however, there are several drawbacks including the need for special devices for the expansion of stem cells outside the body, low rate of cell viability in the body after transplantation, and oncological complications. The use of endogenous stem/progenitor cells, instead of exogenous cells, would be a possible solution, but it is unclear how these cells migrate towards the injury site. METHODS The chemoattractant capacity of the elastin microfibril interface located protein 2 (Emilin2), generated by macrophages, was identified by the migration assay and LC-MS/MS. The functions of Emilin2 in bone regeneration were further studied using Emilin2-/- mice. RESULTS The results show that in response to bone injury, there was an increase in Emilin2, an ECM protein. Produced by macrophages, Emilin2 exhibited chemoattractant properties towards mesenchymal cells. Emilin2-/- mice underwent delayed bone regeneration, with a decrease in mesenchymal cells after injury. Local administration of recombinant Emilin2 protein enhanced bone regeneration. CONCLUSION Emilin2 plays a crucial role in bone regeneration by increasing mesenchymal cells. Therefore, Emilin2 can be used for the treatment of bone fracture by recruiting endogenous progenitor cells.
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Affiliation(s)
- Yifan Qing
- Department of Cell Signaling, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-Ku, Tokyo, 113-8549, Japan
| | - Takehito Ono
- Laboratory of Drug Discovery and Pharmacology, Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoino-Oka, Imabari-Shi, Ehime, 794-8555, Japan
| | - Yukihiro Kohara
- Department of Bone and Joint Disease, National Center for Geriatrics and Gerontology, 7-430, Morioka-Cho, Obu, Aichi Prefecture, 474-8511, Japan
- Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences and Faculty of Pharmaceutical Science, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 287-8510, Japan
| | - Atsushi Watanabe
- Equipment Management Division, Center for Core Facility Administration, National Center for Geriatrics and Gerontology, 7-430, Morioka-Cho, Obu, Aichi Prefecture, 474-8511, Japan
| | - Noboru Ogiso
- Laboratory of Experimental Animal, Center for Core Facility Administration, National Center for Geriatrics and Gerontology, 7-430, Morioka-Cho, Obu, Aichi Prefecture, 474-8511, Japan
| | - Masako Ito
- Nagasaki University, 1-14, Bunkyomachi, Nagasaki, 852-8521, Japan
| | - Tomoki Nakashima
- Faculty of Dentistry, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-Ku, Tokyo, 113-8549, Japan.
| | - Sunao Takeshita
- Department of Bone and Joint Disease, National Center for Geriatrics and Gerontology, 7-430, Morioka-Cho, Obu, Aichi Prefecture, 474-8511, Japan.
- Aging Stress Response Research Project Team, National Center for Geriatrics and Gerontology, 7-430, Morioka-Cho, Obu, Aichi Prefecture, 474-8511, Japan.
- Angitia Biopharmaceuticals, 2F, Unit 2, Building4, 188 Kaiyuan Avenue, Huangpu District, Guangzhou, 510530, China.
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Jones SD, Stewart HJ, Westermann G. A maturational frequency discrimination deficit may explain developmental language disorder. Psychol Rev 2024; 131:695-715. [PMID: 37498700 PMCID: PMC11115354 DOI: 10.1037/rev0000436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 05/04/2023] [Accepted: 05/10/2023] [Indexed: 07/29/2023]
Abstract
Auditory perceptual deficits are widely observed among children with developmental language disorder (DLD). Yet, the nature of these deficits and the extent to which they explain speech and language problems remain controversial. In this study, we hypothesize that disruption to the maturation of the basilar membrane may impede the optimization of the auditory pathway from brainstem to cortex, curtailing high-resolution frequency sensitivity and the efficient spectral decomposition and encoding of natural speech. A series of computational simulations involving deep convolutional neural networks that were trained to encode, recognize, and retrieve naturalistic speech are presented to demonstrate the strength of this account. These neural networks were built on top of biologically truthful inner ear models developed to model human cochlea function, which-in the key innovation of the present study-were scheduled to mature at different rates over time. Delaying cochlea maturation qualitatively replicated the linguistic behavior and neurophysiology of individuals with language learning difficulties in a number of ways, resulting in (a) delayed language acquisition profiles, (b) lower spoken word recognition accuracy, (c) word finding and retrieval difficulties, (d) "fuzzy" and intersecting speech encodings and signatures of immature neural optimization, and (e) emergent working memory and attentional deficits. These simulations illustrate many negative cascading effects that a primary maturational frequency discrimination deficit may have on early language development and generate precise and testable hypotheses for future research into the nature and cost of auditory processing deficits in children with language learning difficulties. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
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Pressé MT, Malgrange B, Delacroix L. The cochlear matrisome: Importance in hearing and deafness. Matrix Biol 2024; 125:40-58. [PMID: 38070832 DOI: 10.1016/j.matbio.2023.12.002] [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: 08/25/2023] [Revised: 11/20/2023] [Accepted: 12/06/2023] [Indexed: 02/12/2024]
Abstract
The extracellular matrix (ECM) consists in a complex meshwork of collagens, glycoproteins, and proteoglycans, which serves a scaffolding function and provides viscoelastic properties to the tissues. ECM acts as a biomechanical support, and actively participates in cell signaling to induce tissular changes in response to environmental forces and soluble cues. Given the remarkable complexity of the inner ear architecture, its exquisite structure-function relationship, and the importance of vibration-induced stimulation of its sensory cells, ECM is instrumental to hearing. Many factors of the matrisome are involved in cochlea development, function and maintenance, as evidenced by the variety of ECM proteins associated with hereditary deafness. This review describes the structural and functional ECM components in the auditory organ and how they are modulated over time and following injury.
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Affiliation(s)
- Mary T Pressé
- Developmental Neurobiology Unit, GIGA-Neurosciences, University of Liège, 15 avenue Hippocrate - CHU - B36 (1st floor), Liège B-4000, Belgium
| | - Brigitte Malgrange
- Developmental Neurobiology Unit, GIGA-Neurosciences, University of Liège, 15 avenue Hippocrate - CHU - B36 (1st floor), Liège B-4000, Belgium
| | - Laurence Delacroix
- Developmental Neurobiology Unit, GIGA-Neurosciences, University of Liège, 15 avenue Hippocrate - CHU - B36 (1st floor), Liège B-4000, Belgium.
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Rose KP, Manilla G, Milon B, Zalzman O, Song Y, Coate TM, Hertzano R. Spatially distinct otic mesenchyme cells show molecular and functional heterogeneity patterns before hearing onset. iScience 2023; 26:107769. [PMID: 37720106 PMCID: PMC10502415 DOI: 10.1016/j.isci.2023.107769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 06/29/2023] [Accepted: 08/25/2023] [Indexed: 09/19/2023] Open
Abstract
The cochlea consists of diverse cellular populations working in harmony to convert mechanical stimuli into electrical signals for the perception of sound. Otic mesenchyme cells (OMCs), often considered a homogeneous cell type, are essential for normal cochlear development and hearing. Despite being the most numerous cell type in the developing cochlea, OMCs are poorly understood. OMCs are known to differentiate into spatially and functionally distinct cell types, including fibrocytes of the lateral wall and spiral limbus, modiolar osteoblasts, and specialized tympanic border cells of the basilar membrane. Here, we show that OMCs are transcriptionally and functionally heterogeneous and can be divided into four distinct populations that spatially correspond to OMC-derived cochlear structures. We also show that this heterogeneity and complexity of OMCs commences during early phases of cochlear development. Finally, we describe the cell-cell communication network of the developing cochlea, inferring a major role for OMC in outgoing signaling.
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Affiliation(s)
- Kevin P. Rose
- Neurotology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD 20892, USA
| | - Gabriella Manilla
- Neurotology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD 20892, USA
| | - Beatrice Milon
- Neurotology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ori Zalzman
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Yang Song
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Thomas M. Coate
- Department of Biology, Georgetown University, Washington, DC 20007, USA
| | - Ronna Hertzano
- Neurotology Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD 20892, USA
- Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Department of Otorhinolaryngology Head and Neck Surgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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Wang X, Zhou Z, Yu C, He K, Sun L, Kou Y, Zhang M, Zhang Z, Luo P, Wen L, Chen G. A prestin-targeting peptide-guided drug delivery system rearranging concentration gradient in the inner ear: An improved strategy against hearing loss. Eur J Pharm Sci 2023; 187:106490. [PMID: 37295658 DOI: 10.1016/j.ejps.2023.106490] [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: 03/30/2023] [Revised: 05/23/2023] [Accepted: 06/06/2023] [Indexed: 06/12/2023]
Abstract
Hearing loss is mainly due to outer hair cell (OHC) damage in three cochlear turns. Local administration via the round window membrane (RWM) has considerable otological clinical potential in bypassing the blood-labyrinth barrier. However, insufficient drug distribution in the apical and middle cochlear turns results in unsatisfactory efficacy. We functionalized poly (lactic-co-glycolic acid) nanoparticles (PLGA NPs) with targeting peptide A665, which specifically bound to prestin, a protein uniquely expressed in OHCs. The modification facilitated the cellular uptake and RWM permeability of NPs. Notably, the guide of A665 towards OHCs enabled more NPs perfusion in the apical and middle cochlear turns without decreasing accumulation in the basal cochlear turn. Subsequently, curcumin (CUR), an appealing anti-ototoxic drug, was encapsulated in NPs. In aminoglycoside-treated guinea pigs with the worst hearing level, CUR/A665-PLGA NPs, with superior performance to CUR/PLGA NPs, almost completely preserved the OHCs in three cochlear turns. The lack of increased low-frequencies hearing thresholds further confirmed that the delivery system with prestin affinity mediated cochlear distribution rearrangement. Good inner ear biocompatibility and little or no embryonic zebrafish toxicity were observed throughout the treatment. Overall, A665-PLGA NPs act as desirable tools with sufficient inner ear delivery for improved efficacy against severe hearing loss.
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Affiliation(s)
- Xinrui Wang
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery & Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System & Class III Laboratory of Modern Chinese Medicine Preparation & Key Laboratory of Modern Chinese Medicine of Education Department of Guangdong Province, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Zeming Zhou
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery & Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System & Class III Laboratory of Modern Chinese Medicine Preparation & Key Laboratory of Modern Chinese Medicine of Education Department of Guangdong Province, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Chong Yu
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery & Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System & Class III Laboratory of Modern Chinese Medicine Preparation & Key Laboratory of Modern Chinese Medicine of Education Department of Guangdong Province, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Kerui He
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery & Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System & Class III Laboratory of Modern Chinese Medicine Preparation & Key Laboratory of Modern Chinese Medicine of Education Department of Guangdong Province, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Lifang Sun
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery & Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System & Class III Laboratory of Modern Chinese Medicine Preparation & Key Laboratory of Modern Chinese Medicine of Education Department of Guangdong Province, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Yuwei Kou
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery & Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System & Class III Laboratory of Modern Chinese Medicine Preparation & Key Laboratory of Modern Chinese Medicine of Education Department of Guangdong Province, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Ming Zhang
- Guangdong Sunho Pharmaceutical Co. Ltd, Zhongshan 528437, China
| | - Zhifeng Zhang
- State Key Laboratory for Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau 000853, China
| | - Pei Luo
- State Key Laboratory for Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau 000853, China
| | - Lu Wen
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China.
| | - Gang Chen
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery & Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System & Class III Laboratory of Modern Chinese Medicine Preparation & Key Laboratory of Modern Chinese Medicine of Education Department of Guangdong Province, Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, China.
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Tani T, Koike-Tani M, Tran MT, Shribak M, Levic S. Postnatal structural development of mammalian Basilar Membrane provides anatomical basis for the maturation of tonotopic maps and frequency tuning. Sci Rep 2021; 11:7581. [PMID: 33828185 PMCID: PMC8027603 DOI: 10.1038/s41598-021-87150-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 03/16/2021] [Indexed: 02/01/2023] Open
Abstract
The basilar membrane (BM) of the mammalian cochlea constitutes a spiraling acellular ribbon that is intimately attached to the organ of Corti. Its graded stiffness, increasing from apex to the base of the cochlea provides the mechanical basis for sound frequency analysis. Despite its central role in auditory signal transduction, virtually nothing is known about the BM's structural development. Using polarized light microscopy, the present study characterized the architectural transformations of freshly dissected BM at time points during postnatal development and maturation. The results indicate that the BM structural elements increase progressively in size, becoming radially aligned and more tightly packed with maturation and reach the adult structural signature by postnatal day 20 (P20). The findings provide insight into structural details and developmental changes of the mammalian BM, suggesting that BM is a dynamic structure that changes throughout the life of an animal.
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Affiliation(s)
- Tomomi Tani
- Marine Biological Laboratory, Eugene Bell Center, Woods Hole, MA, USA
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology, Ikeda, Osaka, Japan
| | - Maki Koike-Tani
- Marine Biological Laboratory, Eugene Bell Center, Woods Hole, MA, USA
- Integrated Frontier Research for Medical Science Division, Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University, Suita, Osaka, Japan
| | - Mai Thi Tran
- Marine Biological Laboratory, Eugene Bell Center, Woods Hole, MA, USA
- College of Engineering and Computer Science, VinUniversity, Gia Lam District, Hanoi, Vietnam
| | - Michael Shribak
- Marine Biological Laboratory, Eugene Bell Center, Woods Hole, MA, USA
| | - Snezana Levic
- Marine Biological Laboratory, Eugene Bell Center, Woods Hole, MA, USA.
- Sensory Neuroscience Research Group, School of Pharmacy and Biomolecular Sciences, University of Brighton, Huxley Building, Brighton, BN2 4GJ, UK.
- Brighton and Sussex Medical School, University of Sussex, Brighton, BN1 9PX, UK.
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