1
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Wang M, Hong Y, Fu X, Sun X. Advances and applications of biomimetic biomaterials for endogenous skin regeneration. Bioact Mater 2024; 39:492-520. [PMID: 38883311 PMCID: PMC11179177 DOI: 10.1016/j.bioactmat.2024.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 04/11/2024] [Accepted: 04/11/2024] [Indexed: 06/18/2024] Open
Abstract
Endogenous regeneration is becoming an increasingly important strategy for wound healing as it facilitates skin's own regenerative potential for self-healing, thereby avoiding the risks of immune rejection and exogenous infection. However, currently applied biomaterials for inducing endogenous skin regeneration are simplistic in their structure and function, lacking the ability to accurately mimic the intricate tissue structure and regulate the disordered microenvironment. Novel biomimetic biomaterials with precise structure, chemical composition, and biophysical properties offer a promising avenue for achieving perfect endogenous skin regeneration. Here, we outline the recent advances in biomimetic materials induced endogenous skin regeneration from the aspects of structural and functional mimicry, physiological process regulation, and biophysical property design. Furthermore, novel techniques including in situ reprograming, flexible electronic skin, artificial intelligence, single-cell sequencing, and spatial transcriptomics, which have potential to contribute to the development of biomimetic biomaterials are highlighted. Finally, the prospects and challenges of further research and application of biomimetic biomaterials are discussed. This review provides reference to address the clinical problems of rapid and high-quality skin regeneration.
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Affiliation(s)
- Mengyang Wang
- Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Department, PLA General Hospital and PLA Medical College, Beijing, 100853, PR China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Beijing, 100089, PR China
| | - Yiyue Hong
- Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Department, PLA General Hospital and PLA Medical College, Beijing, 100853, PR China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Beijing, 100089, PR China
| | - Xiaobing Fu
- Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Department, PLA General Hospital and PLA Medical College, Beijing, 100853, PR China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Beijing, 100089, PR China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, PR China
| | - Xiaoyan Sun
- Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Department, PLA General Hospital and PLA Medical College, Beijing, 100853, PR China
- PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Beijing, 100089, PR China
- Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, PR China
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2
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Moradikhah F, Farahani M, Shafiee A. Towards the development of sensation-enabled skin substitutes. Biomater Sci 2024. [PMID: 38990154 DOI: 10.1039/d4bm00576g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
Recent advances in cell and biofabrication technologies have contributed to the development of complex human organs. In particular, several skin substitutes are being generated using tissue engineering and regenerative medicine (TERM) technologies. However, recent studies mainly focus on the restoration of the dermis and epidermis layers rather than the regeneration of a fully functional innervated skin organ. Innervation is a critical step in functional tissue repair which has been overlooked in the current TERM studies. In the current study, we highlight the importance of sensation in the skin as the largest sensory organ in the human body. In large non-healing skin wounds, the skin sensation is severely diminished or completely lost and ultimately lead to chronic pain and wound healing process interruption. Current therapeutics for restoring skin sensation after trauma are limited. Recent regenerative medicine-based studies could successfully induce neural networks in skin substitutes, but the effectiveness of these technologies in enhancing sensory capability needs further investigation.
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Affiliation(s)
- Farzad Moradikhah
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Mojtaba Farahani
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
- Institute of Biomaterials, University of Tehran & Tehran University of Medical Sciences (IBUTUMS), Tehran, Iran
| | - Abbas Shafiee
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4102, Australia.
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3
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Varpe A, Sayed M, Mane NS. A Comprehensive Literature Review on Advancements and Challenges in 3D Bioprinting of Human Organs: Ear, Skin, and Bone. Ann Biomed Eng 2024:10.1007/s10439-024-03580-3. [PMID: 38977527 DOI: 10.1007/s10439-024-03580-3] [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: 05/15/2024] [Accepted: 07/02/2024] [Indexed: 07/10/2024]
Abstract
The field of 3D bioprinting is rapidly emerging within the realm of regenerative medicine, offering significant potential in dealing with the issue of organ shortages. Despite being in its early stages, it has the potential to replicate tissue structures accurately, providing new potential solutions for reconstructive surgery. This review explores the diverse applications of 3D bioprinting in regenerative medicine, pharmaceuticals, and the food industry, specifically focusing on ear, skin, and bone tissues due to their unique challenges and implications in the field. Significant progress has been made in cartilage and bone scaffold fabrication in ear reconstruction, yet challenges in functional maturation persist. Recent advancements highlight the potential for patient-specific ear substitutes, emphasizing the need for extensive clinical trials. In skin regeneration, 3D bioprinting addresses limitations in existing models, offering opportunities for improved wound healing and realistic skin models. While challenges exist, progress in biomaterials and in-situ bioprinting holds promise. In bone regeneration, 3D bioprinting presents personalized solutions for defects, but scaffold design refinement and addressing regulatory and ethical considerations are crucial. The transformative potential of 3D bioprinting in the field of medicine holds the promise of redefining therapeutic approaches and delivering personalized treatments and functional tissues. Interdisciplinary collaboration is essential for fully realizing the capabilities of 3D bioprinting. This review provides a detailed analysis of current methodologies, challenges, and prospects in 3D bioprinting for ear, skin, and bone tissue regeneration.
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Affiliation(s)
- Aishwarya Varpe
- School of Engineering, Ajeenkya DY Patil University, Charholi Bk., Lohegaon, Pune, Maharashtra, 412105, India
| | - Marwana Sayed
- School of Engineering, Ajeenkya DY Patil University, Charholi Bk., Lohegaon, Pune, Maharashtra, 412105, India
| | - Nikhil S Mane
- School of Engineering, Ajeenkya DY Patil University, Charholi Bk., Lohegaon, Pune, Maharashtra, 412105, India.
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4
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Wu J, Yu F, Shao M, Zhang T, Lu W, Chen X, Wang Y, Guo Y. Electrospun Nanofiber Scaffold for Skin Tissue Engineering: A Review. ACS APPLIED BIO MATERIALS 2024; 7:3556-3567. [PMID: 38777621 DOI: 10.1021/acsabm.4c00318] [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] [Indexed: 05/25/2024]
Abstract
Skin tissue engineering (STE) is widely regarded as an effective approach for skin regeneration. Several synthetic biomaterials utilized for STE have demonstrated favorable fibrillar characteristics, facilitating the regeneration of skin tissue at the site of injury, yet they have exhibited a lack of in situ degradation. Various types of skin regenerative materials, such as hydrogels, nanofiber scaffolds, and 3D-printing composite scaffolds, have recently emerged for use in STE. Electrospun nanofiber scaffolds possess distinct advantages, such as their wide availability, similarity to natural structures, and notable tissue regenerative capabilities, which have garnered the attention of researchers. Hence, electrospun nanofiber scaffolds may serve as innovative biological materials possessing the necessary characteristics and potential for use in tissue engineering. Recent research has demonstrated the potential of electrospun nanofiber scaffolds to facilitate regeneration of skin tissues. Nevertheless, there is a need to enhance the rapid degradation and limited mechanical properties of electrospun nanofiber scaffolds in order to strengthen their effectiveness in soft tissue engineering applications in clinical settings. This Review centers on advanced research into electrospun nanofiber scaffolds, encompassing preparation methods, materials, fundamental research, and preclinical applications in the field of science, technology, and engineering. The existing challenges and prospects of electrospun nanofiber scaffolds in STE are also addressed.
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Affiliation(s)
- Jingwen Wu
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Beijing 100190, P. R. China
- Hangzhou CASbios Medical Company Hangzhou 310000, P. R. China
| | - Fenglin Yu
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Mingfei Shao
- Hangzhou CASbios Medical Company Hangzhou 310000, P. R. China
| | - Tong Zhang
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Weipeng Lu
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Beijing 100190, P. R. China
- Hangzhou CASbios Medical Company Hangzhou 310000, P. R. China
| | - Xin Chen
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yihu Wang
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yanchuan Guo
- Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Beijing 100190, P. R. China
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5
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Du F, Li J, Zhang S, Zeng X, Nie J, Li Z. Oxidative stress in hair follicle development and hair growth: Signalling pathways, intervening mechanisms and potential of natural antioxidants. J Cell Mol Med 2024; 28:e18486. [PMID: 38923380 PMCID: PMC11196958 DOI: 10.1111/jcmm.18486] [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: 02/08/2024] [Revised: 05/02/2024] [Accepted: 05/28/2024] [Indexed: 06/28/2024] Open
Abstract
Hair follicle development and hair growth are regulated by multiple factors and multiple signalling pathways. The hair follicle, as an important skin appendage, is the basis for hair growth, and it has the functions of safeguarding the body, perceiving the environment and regulating body temperature. Hair growth undergoes a regular hair cycle, including anagen, catagen and telogen. A small amount of physiological shedding of hair occurs under normal conditions, always in a dynamic equilibrium. Hair loss occurs when the skin or hair follicles are stimulated by oxidative stress, inflammation or hormonal disorders that disrupt the homeostasis of the hair follicles. Numerous researches have indicated that oxidative stress is an important factor causing hair loss. Here, we summarize the signalling pathways and intervention mechanisms by which oxidative stress affects hair follicle development and hair growth, discuss existing treatments for hair loss via the antioxidant pathway and provide our own insights. In addition, we collate antioxidant natural products promoting hair growth in recent years and discuss the limitations and perspectives of current hair loss prevention and treatment.
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Affiliation(s)
- Fanpan Du
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical UniversityZunyiChina
- Key Laboratory of Basic Pharmacology of Guizhou ProvinceZunyi Medical UniversityZunyiChina
- Department of Pharmacology, School of PharmacyZunyi Medical UniversityZunyiChina
| | - Jingjie Li
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical UniversityZunyiChina
- Key Laboratory of Basic Pharmacology of Guizhou ProvinceZunyi Medical UniversityZunyiChina
- Department of Pharmacology, School of PharmacyZunyi Medical UniversityZunyiChina
| | - Shiqian Zhang
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical UniversityZunyiChina
- Key Laboratory of Basic Pharmacology of Guizhou ProvinceZunyi Medical UniversityZunyiChina
- Department of Pharmacology, School of PharmacyZunyi Medical UniversityZunyiChina
| | - Xuemei Zeng
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical UniversityZunyiChina
- Key Laboratory of Basic Pharmacology of Guizhou ProvinceZunyi Medical UniversityZunyiChina
- Department of Pharmacology, School of PharmacyZunyi Medical UniversityZunyiChina
| | - Jing Nie
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical UniversityZunyiChina
- Key Laboratory of Basic Pharmacology of Guizhou ProvinceZunyi Medical UniversityZunyiChina
- Department of Pharmacology, School of PharmacyZunyi Medical UniversityZunyiChina
| | - Zheng Li
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of EducationZunyi Medical UniversityZunyiChina
- Key Laboratory of Basic Pharmacology of Guizhou ProvinceZunyi Medical UniversityZunyiChina
- Department of Pharmacology, School of PharmacyZunyi Medical UniversityZunyiChina
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6
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Aw YB, Chen S, Yeo A, Dangerfield JA, Mok P. Development and functional testing of a novel in vitro delayed scratch closure assay. Histochem Cell Biol 2024:10.1007/s00418-024-02292-y. [PMID: 38713267 DOI: 10.1007/s00418-024-02292-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2024] [Indexed: 05/08/2024]
Abstract
As the development of chronic wound therapeutics continues to expand, the demand for advanced assay systems mimicking the inflammatory wound microenvironment in vivo increases. Currently, this is performed in animal models or in in vitro cell-based models such as cell culture scratch assays that more closely resemble acute wounds. Here, we describe for the first time a delayed scratch closure model that mimics some features of a chronic wound in vitro. Chronic wounds such as those suffered by later stage diabetic patients are characterised by degrees of slowness to heal caused by a combination of continued localised physical trauma and pro-inflammatory signalling at the wound. To recreate this in a cell-based assay, a defined physical scratch was created and stimulated by combinations of pro-inflammatory factors, namely interferon, the phorbol ester PMA, and lipopolysaccharide, to delay scratch closure. The concentrations of these factors were characterised for commonly used human keratinocyte (HaCaT) and dermal fibroblast (HDF) cell lines. These models were then tested for scratch closure responsiveness to a proprietary healing secretome derived from human Wharton's jelly mesenchymal stem cells (MSCs) previously validated and shown to be highly effective on closure of acute wound models both in vitro and in vivo. The chronically open scratches from HaCaT cells showed closure after exposure to the MSC secretome product. We propose this delayed scratch closure model for academic and industrial researchers studying chronic wounds looking for responsiveness to drugs or biological treatments prior to testing on explanted patient material or in vivo.
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Affiliation(s)
- Yi Bing Aw
- Celligenics Pte Ltd, Singapore, Singapore
| | - Sixun Chen
- Celligenics Pte Ltd, Singapore, Singapore
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Aimin Yeo
- Celligenics Pte Ltd, Singapore, Singapore
| | - John A Dangerfield
- Celligenics Pte Ltd, Singapore, Singapore
- Austrianova Singapore Pte Ltd, Singapore, Singapore
| | - Pamela Mok
- Celligenics Pte Ltd, Singapore, Singapore.
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7
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Shafiee A, Sun J, Ahmed IA, Phua F, Rossi GR, Lin CY, Souza-Fonseca-Guimaraes F, Wolvetang EJ, Brown J, Khosrotehrani K. Development of Physiologically Relevant Skin Organoids from Human Induced Pluripotent Stem Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2304879. [PMID: 38044307 DOI: 10.1002/smll.202304879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 09/28/2023] [Indexed: 12/05/2023]
Abstract
The development of skin organs for studying developmental pathways, modeling diseases, or regenerative medicine purposes is a major endeavor in the field. Human induced pluripotent stem cells (hiPSCs) are successfully used to derive skin cells, but the field is still far from meeting the goal of creating skin containing appendages, such as hair follicles and sweat glands. Here, the goal is to generate skin organoids (SKOs) from human skin fibroblast or placental CD34+ cell-derived hiPSCs. With all three hiPSC lines, complex SKOs with stratified skin layers and pigmented hair follicles are generated with different efficacies. In addition, the hiPSC-derived SKOs develop sebaceous glands, touch-receptive Merkel cells, and more importantly eccrine sweat glands. Together, physiologically relevant skin organoids are developed by direct induction of embryoid body formation, along with simultaneous inactivation of transforming growth factor beta signaling, activation of fibroblast growth factor signaling, and inhibition of bone morphogenetic protein signaling pathways. The skin organoids created in this study can be used as valuable platforms for further research into human skin development, disease modeling, or reconstructive surgeries.
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Affiliation(s)
- Abbas Shafiee
- Herston Biofabrication Institute, Metro North Hospital and Health Service, Brisbane, QLD, 4029, Australia
- Royal Brisbane and Women's Hospital, Metro North Hospital and Health Service, Brisbane, QLD, 4029, Australia
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4102, Australia
| | - Jane Sun
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4102, Australia
| | - Imaan A Ahmed
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4102, Australia
| | - Felicia Phua
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4102, Australia
| | - Gustavo R Rossi
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4102, Australia
| | - Cheng-Yu Lin
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4102, Australia
| | | | - Ernst J Wolvetang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Jason Brown
- Herston Biofabrication Institute, Metro North Hospital and Health Service, Brisbane, QLD, 4029, Australia
- Royal Brisbane and Women's Hospital, Metro North Hospital and Health Service, Brisbane, QLD, 4029, Australia
| | - Kiarash Khosrotehrani
- Herston Biofabrication Institute, Metro North Hospital and Health Service, Brisbane, QLD, 4029, Australia
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD, 4102, Australia
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8
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Ahmed I, Sun J, Brown J, Khosrotehrani K, Shafiee A. An optimized protocol for generating appendage-bearing skin organoids from human-induced pluripotent stem cells. Biol Methods Protoc 2024; 9:bpae019. [PMID: 38605978 PMCID: PMC11009018 DOI: 10.1093/biomethods/bpae019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 02/29/2024] [Accepted: 03/20/2024] [Indexed: 04/13/2024] Open
Abstract
Organoid generation from pluripotent stem cells is a cutting-edge technique that has created new possibilities for modelling human organs in vitro, as well as opening avenues for regenerative medicine. Here, we present a protocol for generating skin organoids (SKOs) from human-induced pluripotent stem cells (hiPSCs) via direct embryoid body formation. This method provides a consistent start point for hiPSC differentiation, resulting in SKOs with complex skin architecture and appendages (e.g. hair follicles, sebaceous glands, etc.) across hiPSC lines from two different somatic sources.
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Affiliation(s)
- Imaan Ahmed
- The University of Queensland Frazer Institute, The University of Queensland, Brisbane, QLD 4102, Australia
| | - Jane Sun
- The University of Queensland Frazer Institute, The University of Queensland, Brisbane, QLD 4102, Australia
| | - Jason Brown
- Herston Biofabrication Institute, Metro North Hospital and Health Service, Brisbane, QLD 4029, Australia
- Royal Brisbane and Women’s Hospital, Metro North Hospital and Health Service, Brisbane, QLD 4029, Australia
| | - Kiarash Khosrotehrani
- The University of Queensland Frazer Institute, The University of Queensland, Brisbane, QLD 4102, Australia
- Herston Biofabrication Institute, Metro North Hospital and Health Service, Brisbane, QLD 4029, Australia
| | - Abbas Shafiee
- The University of Queensland Frazer Institute, The University of Queensland, Brisbane, QLD 4102, Australia
- Herston Biofabrication Institute, Metro North Hospital and Health Service, Brisbane, QLD 4029, Australia
- Royal Brisbane and Women’s Hospital, Metro North Hospital and Health Service, Brisbane, QLD 4029, Australia
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9
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Cho SW, Malick H, Kim SJ, Grattoni A. Advances in Skin-on-a-Chip Technologies for Dermatological Disease Modeling. J Invest Dermatol 2024:S0022-202X(24)00115-5. [PMID: 38493383 DOI: 10.1016/j.jid.2024.01.031] [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: 10/30/2023] [Revised: 01/19/2024] [Accepted: 01/29/2024] [Indexed: 03/18/2024]
Abstract
Skin-on-a-chip (SoC) technologies are emerging as a paradigm shift in dermatology research by replicating human physiology in a dynamic manner not achievable by current animal models. Although animal models have contributed to successful clinical trials, their ability to predict human outcomes remains questionable, owing to inherent differences in skin anatomy and immune response. Covering areas including infectious diseases, autoimmune skin conditions, wound healing, drug toxicity, aging, and antiaging, SoC aims to circumvent the inherent disparities created by traditional models. In this paper, we review current SoC technologies, highlighting their potential as an alternative to animal models for a deeper understanding of complex skin conditions.
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Affiliation(s)
- Seo Won Cho
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, Texas, USA; Texas A&M University School of Medicine, College Station, Texas, USA
| | - Hamza Malick
- Texas A&M University School of Medicine, College Station, Texas, USA
| | - Soo Jung Kim
- Department of Dermatology, Baylor College of Medicine, Houston, Texas, USA
| | - Alessandro Grattoni
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, Texas, USA; Department of Surgery, Houston Methodist Hospital, Houston, Texas, USA; Department of Radiation Oncology, Houston Methodist Hospital, Houston, Texas, USA.
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10
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Ji S, Li Y, Xiang L, Liu M, Xiong M, Cui W, Fu X, Sun X. Cocktail Cell-Reprogrammed Hydrogel Microspheres Achieving Scarless Hair Follicle Regeneration. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306305. [PMID: 38225741 DOI: 10.1002/advs.202306305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/24/2023] [Indexed: 01/17/2024]
Abstract
The scar repair inevitably causes damage of skin function and loss of skin appendages such as hair follicles (HF). It is of great challenge in wound repair that how to intervene in scar formation while simultaneously remodeling HF niche and inducing in situ HF regeneration. Here, chemical reprogramming techniques are used to identify a clinically chemical cocktail (Tideglusib and Tamibarotene) that can drive fibroblasts toward dermal papilla cell (DPC) fate. Considering the advantage of biomaterials in tissue repair and their regulation in cell behavior that may contributes to cellular reprogramming, the artificial HF seeding (AHFS) hydrogel microspheres, inspired by the natural processes of "seeding and harvest", are constructed via using a combination of liposome nanoparticle drug delivery system, photoresponsive hydrogel shell, positively charged polyamide modification, microfluidic and photocrosslinking techniques. The identified chemical cocktail is as the core nucleus of AHFS. In vitro and in vivo studies show that AHFS can regulate fibroblast fate, induce fibroblast-to-DPC reprogramming by activating the PI3K/AKT pathway, finally promoting wound healing and in situ HF regeneration while inhibiting scar formation in a two-pronged translational approach. In conclusion, AHFS provides a new and effective strategy for functional repair of skin wounds.
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Affiliation(s)
- Shuaifei Ji
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department, PLA General Hospital and PLA Medical College, PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, P. R. China
| | - Yingying Li
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department, PLA General Hospital and PLA Medical College, PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, P. R. China
| | - Lei Xiang
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Mingyue Liu
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Mingchen Xiong
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department, PLA General Hospital and PLA Medical College, PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, P. R. China
| | - Wenguo Cui
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department, PLA General Hospital and PLA Medical College, PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, P. R. China
- Department of Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, P. R. China
| | - Xiaobing Fu
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department, PLA General Hospital and PLA Medical College, PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, P. R. China
| | - Xiaoyan Sun
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department, PLA General Hospital and PLA Medical College, PLA Key Laboratory of Tissue Repair and Regenerative Medicine and Beijing Key Research Laboratory of Skin Injury, Repair and Regeneration, Research Unit of Trauma Care, Tissue Repair and Regeneration, Chinese Academy of Medical Sciences, 2019RU051, Beijing, 100048, P. R. China
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11
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Zhang J, Yu H, Man M, Hu L. Aging in the dermis: Fibroblast senescence and its significance. Aging Cell 2024; 23:e14054. [PMID: 38040661 PMCID: PMC10861215 DOI: 10.1111/acel.14054] [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: 08/13/2023] [Revised: 10/29/2023] [Accepted: 11/15/2023] [Indexed: 12/03/2023] Open
Abstract
Skin aging is characterized by changes in its structural, cellular, and molecular components in both the epidermis and dermis. Dermal aging is distinguished by reduced dermal thickness, increased wrinkles, and a sagging appearance. Due to intrinsic or extrinsic factors, accumulation of excessive reactive oxygen species (ROS) triggers a series of aging events, including imbalanced extracellular matrix (ECM) homeostasis, accumulation of senescent fibroblasts, loss of cell identity, and chronic inflammation mediated by senescence-associated secretory phenotype (SASP). These events are regulated by signaling pathways, such as nuclear factor erythroid 2-related factor 2 (Nrf2), mechanistic target of rapamycin (mTOR), transforming growth factor beta (TGF-β), and insulin-like growth factor 1 (IGF-1). Senescent fibroblasts can induce and accelerate age-related dysfunction of other skin cells and may even cause systemic inflammation. In this review, we summarize the role of dermal fibroblasts in cutaneous aging and inflammation. Moreover, the underlying mechanisms by which dermal fibroblasts influence cutaneous aging and inflammation are also discussed.
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Affiliation(s)
- Jing Zhang
- Immunology Department, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education)Tianjin Medical UniversityTianjinChina
| | - Haoyue Yu
- Immunology Department, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education)Tianjin Medical UniversityTianjinChina
| | - Mao‐Qiang Man
- Dermatology HospitalSouthern Medical UniversityGuangdongChina
- Department of DermatologyUniversity of California San Francisco and Veterans Affairs Medical CenterSan FranciscoCaliforniaUSA
| | - Lizhi Hu
- Immunology Department, Key Laboratory of Immune Microenvironment and Disease (Ministry of Education)Tianjin Medical UniversityTianjinChina
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Downer M, Berry CE, Parker JB, Kameni L, Griffin M. Current Biomaterials for Wound Healing. Bioengineering (Basel) 2023; 10:1378. [PMID: 38135969 PMCID: PMC10741152 DOI: 10.3390/bioengineering10121378] [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: 10/04/2023] [Revised: 11/20/2023] [Accepted: 11/23/2023] [Indexed: 12/24/2023] Open
Abstract
Wound healing is the body's process of injury recovery. Skin healing is divided into four distinct overlapping phases: hemostasis, inflammation, proliferation, and remodeling. Cell-to-cell interactions mediated by both cytokines and chemokines are imperative for the transition between these phases. Patients can face difficulties in the healing process due to the wound being too large, decreased vascularization, infection, or additional burdens of a systemic illness. The field of tissue engineering has been investigating biomaterials as an alternative for skin regeneration. Biomaterials used for wound healing may be natural, synthetic, or a combination of both. Once a specific biomaterial is selected, it acts as a scaffold for skin regeneration. When the scaffold is applied to a wound, it allows for the upregulation of distinct molecular signaling pathways important for skin repair. Although tissue engineering has made great progress, more research is needed in order to support the use of biomaterials for wound healing for clinical translation.
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Affiliation(s)
- Mauricio Downer
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.D.); (C.E.B.); (J.B.P.); (L.K.)
| | - Charlotte E. Berry
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.D.); (C.E.B.); (J.B.P.); (L.K.)
| | - Jennifer B. Parker
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.D.); (C.E.B.); (J.B.P.); (L.K.)
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Lionel Kameni
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.D.); (C.E.B.); (J.B.P.); (L.K.)
| | - Michelle Griffin
- Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (M.D.); (C.E.B.); (J.B.P.); (L.K.)
- Hagey Laboratory for Pediatric Regenerative Medicine, 257 Campus Drive, MC 5148, Stanford, CA 94305, USA
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Lin X, Sun L, Lu M, Zhao Y. Biomimetic Gland Models with Engineered Stratagems. RESEARCH (WASHINGTON, D.C.) 2023; 6:0232. [PMID: 37719047 PMCID: PMC10503994 DOI: 10.34133/research.0232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 08/29/2023] [Indexed: 09/19/2023]
Abstract
As extensively distributed tissues throughout the human body, glands play a critical role in various physiological processes. Therefore, the construction of biomimetic gland models in vitro has aroused great interest in multiple disciplines. In the biological field, the researchers focus on optimizing the cell sources and culture techniques to reconstruct the specific structures and functions of glands, such as the emergence of organoid technology. From the perspective of biomedical engineering, the generation of biomimetic gland models depends on the combination of engineered scaffolds and microfluidics, to mimic the in vivo environment of glandular tissues. These engineered stratagems endowed gland models with more biomimetic features, as well as a wide range of application prospects. In this review, we first describe the biomimetic strategies for constructing different in vitro gland models, focusing on the role of microfluidics in promoting the structure and function development of biomimetic glands. After summarizing several common in vitro models of endocrine and exocrine glands, the applications of gland models in disease modelling, drug screening, regenerative medicine, and personalized medicine are enumerated. Finally, we conclude the current challenges and our perspective of these biomimetic gland models.
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Affiliation(s)
- Xiang Lin
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering,
Southeast University, Nanjing 210096, China
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health),
Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
| | - Lingyu Sun
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering,
Southeast University, Nanjing 210096, China
| | - Minhui Lu
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering,
Southeast University, Nanjing 210096, China
| | - Yuanjin Zhao
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering,
Southeast University, Nanjing 210096, China
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health),
Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
- Southeast University Shenzhen Research Institute, Shenzhen 518071, China
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14
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Xu TY, Qing SL, Zhao JX, Song J, Miao ZW, Li JX, Yang FY, Zhao HY, Zheng SL, Li ZY, Wang SN, Miao CY. Metrnl deficiency retards skin wound healing in mice by inhibiting AKT/eNOS signaling and angiogenesis. Acta Pharmacol Sin 2023; 44:1790-1800. [PMID: 37142683 PMCID: PMC10462726 DOI: 10.1038/s41401-023-01090-x] [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: 10/24/2022] [Accepted: 04/05/2023] [Indexed: 05/06/2023] Open
Abstract
Meteorin-like (Metrnl) is a novel secreted protein with various biological activities. In this study, we investigated whether and how Metrnl regulated skin wound healing in mice. Global Metrnl gene knockout mice (Metrnl-/-) and endothelial cell-specific Metrnl gene knockout mice (EC-Metrnl-/-) were generated. Eight-mm-diameter full-thickness excisional wound was made on the dorsum of each mouse. The skin wounds were photographed and analyzed. In C57BL/6 mice, we observed that Metrnl expression levels were markedly increased in skin wound tissues. We found that both global and endothelial cell-specific Metrnl gene knockout significantly retarded mouse skin wound healing, and endothelial Metrnl was the key factor affecting wound healing and angiogenesis. The proliferation, migration and tube formation ability of primary human umbilical vein endothelial cells (HUVECs) were inhibited by Metrnl knockdown, but significantly promoted by addition of recombinant Metrnl (10 ng/mL). Metrnl knockdown abolished the proliferation of endothelial cells stimulated by recombinant VEGFA (10 ng/mL) but not by recombinant bFGF (10 ng/mL). We further revealed that Metrnl deficiency impaired VEGFA downstream AKT/eNOS activation in vitro and in vivo. The damaged angiogenetic activity in Metrnl knockdown HUVECs was partly rescued by addition of AKT activator SC79 (10 μM). In conclusion, Metrnl deficiency retards skin wound healing in mice, which is related to impaired endothelial Metrnl-mediated angiogenesis. Metrnl deficiency impairs angiogenesis by inhibiting AKT/eNOS signaling pathway.
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Affiliation(s)
- Tian-Ying Xu
- Department of Pharmacology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China.
- Department of Anesthetic Pharmacology, School of Anesthesiology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China.
| | - Sheng-Li Qing
- Department of Pharmacology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China
| | - Jing-Xin Zhao
- Department of Pharmacology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China
| | - Jie Song
- Department of Pharmacology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China
| | - Zhu-Wei Miao
- Department of Pharmacology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China
| | - Jia-Xin Li
- Department of Pharmacology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China
| | - Feng-Yan Yang
- Department of Anesthetic Pharmacology, School of Anesthesiology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China
| | - Huan-Yu Zhao
- Department of Pharmacology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China
| | - Si-Li Zheng
- Department of Pharmacology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China
| | - Zhi-Yong Li
- Department of Pharmacology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China
| | - Shu-Na Wang
- Department of Pharmacology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China
| | - Chao-Yu Miao
- Department of Pharmacology, Second Military Medical University/Naval Medical University, Shanghai, 200433, China.
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Brazzoli M, Piccioli D, Marchetti F. Challenges in development of vaccines directed toward antimicrobial resistant bacterial species. Hum Vaccin Immunother 2023; 19:2228669. [PMID: 37449650 DOI: 10.1080/21645515.2023.2228669] [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: 04/28/2023] [Revised: 06/05/2023] [Accepted: 06/20/2023] [Indexed: 07/18/2023] Open
Abstract
Antimicrobial resistance (AMR) is considered by WHO one of the top ten public health threats. New control strategies involving concerted actions of both public and private sectors need to be developed. Vaccines play a major role in controlling the spread of AMR pathogens by decreasing transmission and limiting the use of antibiotics, reducing at the end the selective pressure for the emergence of new resistant strains. In this review, by using as example some of the most serious AMR pathogens, we highlighted the major hurdles from a research and development point of view. New approaches to better understand the immunological mechanisms of response to both natural infections and vaccines that aimed to identify correlates of protection, together with the application of new technologies for vaccine design and delivery are discussed as potential solutions.
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Wang Y, Zhang F, Yao B, Hou L, Li Z, Song W, Kong Y, Tan Y, Fu X, Huang S. Notch4 participates in mesenchymal stem cell-induced differentiation in 3D-printed matrix and is implicated in eccrine sweat gland morphogenesis. BURNS & TRAUMA 2023; 11:tkad032. [PMID: 37397510 PMCID: PMC10309082 DOI: 10.1093/burnst/tkad032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 05/16/2023] [Accepted: 05/22/2023] [Indexed: 07/04/2023]
Abstract
Background Eccrine sweat gland (SG) plays a crucial role in thermoregulation but exhibits very limited regenerative potential. Although SG lineage-restricted niches dominate SG morphogenesis and benefit SG regeneration, rebuilding niches in vivo is challenging for stem cell therapeutic applications. Hence, we attempted to screen and tune the critical niche-responding genes that dually respond to both biochemical and structural cues, which might be a promising strategy for SG regeneration. Methods An artificial SG lineage-restricted niche consisting of mouse plantar dermis homogenates (i.e. biochemical cues) and 3D architecture (i.e. structural cues) was built in vitro by using an extrusion-based 3D bioprinting approach. Mouse bone marrow-derived mesenchymal stem cells (MSCs) were then differentiated into the induced SG cells in the artificial SG lineage-restricted niche. To decouple biochemical cues from structural cues, the transcriptional changes aroused by pure biochemical cues, pure structural cues and synergistic effects of both cues were analyzed pairwise, respectively. Notably, only niche-dual-responding genes that are differentially expressed in response to both biochemical and structural cues and participate in switching MSC fates towards SG lineage were screened out. Validations in vitro and in vivo were respectively conducted by inhibiting or activating the candidate niche-dual-responding gene(s) to explore the consequent effects on SG differentiation. Results Notch4 is one of the niche-dual-responding genes that enhanced MSC stemness and promoted SG differentiation in 3D-printed matrix in vitro. Furthermore, inhibiting Notch4 specifically reduced keratin 19-positive epidermal stem cells and keratin 14-positive SG progenitor cells, thus further delaying embryonic SG morphogenesis in vivo. Conclusions Notch4 not only participates in mouse MSC-induced SG differentiation in vitro but is also implicated in mouse eccrine SG morphogenesis in vivo.
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Affiliation(s)
| | | | | | - Linhao Hou
- Department of Orthopedics, the Fourth Affiliated Hospital of China Medical University, 4 Chongshan East Road, Shenyang, 110032, P. R. China
| | - Zhao Li
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department, Chinese PLA General Hospital, 28 Fu Xing Road, Beijing, 100853, P. R. China
| | - Wei Song
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department, Chinese PLA General Hospital, 28 Fu Xing Road, Beijing, 100853, P. R. China
| | - Yi Kong
- Research Center for Tissue Repair and Regeneration affiliated to the Medical Innovation Research Department, Chinese PLA General Hospital, 28 Fu Xing Road, Beijing, 100853, P. R. China
| | - Yaxin Tan
- College of Graduate, Tianjin Medical University, 22 Qi Xiang Tai Road, Heping District, Tianjin, 300070, P.R. China
| | | | - Sha Huang
- Correspondence. Xiaobing Fu, ; Sha Huang,
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Full Skin Equivalent Models for Simulation of Burn Wound Healing, Exploring Skin Regeneration and Cytokine Response. J Funct Biomater 2023; 14:jfb14010029. [PMID: 36662076 PMCID: PMC9864292 DOI: 10.3390/jfb14010029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/29/2022] [Accepted: 12/31/2022] [Indexed: 01/06/2023] Open
Abstract
Healing of burn injury is a complex process that often leads to the development of functional and aesthetic complications. To study skin regeneration in more detail, organotypic skin models, such as full skin equivalents (FSEs) generated from dermal matrices, can be used. Here, FSEs were generated using de-epidermalized dermis (DED) and collagen matrices MatriDerm® and Mucomaix®. Our aim was to validate the MatriDerm- and Mucomaix-based FSEs for the use as in vitro models of wound healing. Therefore, we first characterized the FSEs in terms of skin development and cell proliferation. Proper dermal and epidermal morphogenesis was established in all FSEs and was comparable to ex vivo human skin models. Extension of culture time improved the organization of the epidermal layers and the basement membrane in MatriDerm-based FSE but resulted in rapid degradation of the Mucomaix-based FSE. After applying a standardized burn injury to the models, re-epithelization occurred in the DED- and MatriDerm-based FSEs at 2 weeks after injury, similar to ex vivo human skin. High levels of pro-inflammatory cytokines were present in the culture media of all models, but no significant differences were observed between models. We anticipate that these animal-free in vitro models can facilitate research on skin regeneration and can be used to test therapeutic interventions in a preclinical setting to improve wound healing.
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