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Jin Y, Sun Q, Ma R, Li R, Qiao R, Li J, Wang L, Hu Y. The trend of allogeneic tendon decellularization: literature review. Cell Tissue Bank 2024; 25:357-367. [PMID: 37355504 DOI: 10.1007/s10561-023-10097-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: 12/07/2022] [Accepted: 06/14/2023] [Indexed: 06/26/2023]
Abstract
Tendon injuries repair is a significant burden for orthopaedic surgeons. Finding a proper graft material to repair tendon is one of the main challenges in orthopaedics, for which the requirement of substitute for tendon repair would be different for each clinical application. Among biological scaffolds, the use of decellularized tendon increasingly represents an interesting approach to treat tendon injuries and several articles have investigated the approaches of tendon decellularization. To understand the outcomes of the the approaches of tendon decellularization on effect of tendon transplantation, a literature review was performed. This review was conducted by searching in Pubmed and Embase and 64 studies were included in this study. The findings revealed that the common approaches to decellularize tendon include chemical, physical, and enzymatic decellularization methods or their combination. With the development of tissue engineering, researchers also put forward new theories such as automatic acellular machine, 3D printing technology to manufacture acellular scaffold.
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Affiliation(s)
- Yangyang Jin
- Graduate School, Tianjin Medical University, Tianjin, China
| | - Qi Sun
- Graduate School, Tianjin Medical University, Tianjin, China
| | - Rongxing Ma
- Graduate School, Tianjin Medical University, Tianjin, China
| | - Ruifeng Li
- Graduate School, Tianjin Medical University, Tianjin, China
| | - Ruiqi Qiao
- Graduate School, Tianjin Medical University, Tianjin, China
| | - Jikai Li
- Graduate School, Tianjin Medical University, Tianjin, China
| | - Limin Wang
- Beijing Wonderful Medical Biomaterials Co., Ltd., Beijing, China
| | - Yongcheng Hu
- Department of Bone and Soft Tissue Oncology, Tianjin Hospital, 406 Jiefang Southern Road, Tianjin, 300000, China.
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2
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Codispoti G, Carniato M, Brogini S, Romanelli A, Martini L, Giavaresi G, Tschon M. Decellularized biological matrices for the repair of rotator cuff lesions: a systematic review of preclinical in vivo studies. Front Bioeng Biotechnol 2024; 12:1345343. [PMID: 38361793 PMCID: PMC10867272 DOI: 10.3389/fbioe.2024.1345343] [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: 11/28/2023] [Accepted: 01/11/2024] [Indexed: 02/17/2024] Open
Abstract
Background: Rotator cuff tears (RCTs), resulting from degeneration or trauma of the shoulder tendons, are one of the main causes of shoulder pain. In particular, massive RCTs represent 40% of all injuries, require surgical treatment, and are characterized by poor clinical outcomes and a high rate of failure. In recent years, the use of biological decellularized patches for augmentation procedures has received great interest owing to their excellent self-integration properties, improving healing and, thus, presenting an innovative therapeutic option. However, the findings from clinical studies have emerged with conflicting viewpoints regarding the benefits of this procedure, as an excessive tension load might compromise the integrity of the tendon-to-bone connection when the patch exhibits low elasticity or insufficient strength. This could prevent the healing process, leading to unpredictable results in clinical practice. Methods: This systematic review was conducted following Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines across three databases (PubMed, Scopus, and Web of Knowledge) to underline the results obtained in preclinical studies involving animal models of RCT surgeries that utilized the biological decellularized matrix augmentation technique in the last 5 years. Results: Thirteen articles were included after the screening, and the SYRCLE tools were applied to assess the risk of bias in in vivo studies. Open-surgery techniques were conducted to create tendon defects or detachment in different animal models: rat (31%), rabbit (46%), dog (15%), and sheep (8%). Patches decellularized with non-standardized protocols were used in 77% of studies, while commercially available matrices were used in 15%. Of the studies, 31% used allogenic patches, 61% used xenogenic patches, and 8% utilized both xenogenic and autologous patches. Conclusion: Overall, this review provides a comprehensive overview of the use of acellular patches and their effective therapeutic potential in rotator cuff (RC) repair at the preclinical level with the aim of expanding the strategies and matrices available for surgeons. Systematic review registration: https://www.crd.york.ac.uk/prospero/, identifier CRD42023468716.
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Affiliation(s)
| | | | - Silvia Brogini
- Surgical Sciences and Technologies, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
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Anjum S, Li T, Saeed M, Ao Q. Exploring polysaccharide and protein-enriched decellularized matrix scaffolds for tendon and ligament repair: A review. Int J Biol Macromol 2024; 254:127891. [PMID: 37931866 DOI: 10.1016/j.ijbiomac.2023.127891] [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: 07/17/2023] [Revised: 10/07/2023] [Accepted: 11/02/2023] [Indexed: 11/08/2023]
Abstract
Tissue engineering (TE) has become a primary research topic for the treatment of diseased or damaged tendon/ligament (T/L) tissue. T/L injuries pose a severe clinical burden worldwide, necessitating the development of effective strategies for T/L repair and tissue regeneration. TE has emerged as a promising strategy for restoring T/L function using decellularized extracellular matrix (dECM)-based scaffolds. dECM scaffolds have gained significant prominence because of their native structure, relatively high bioactivity, low immunogenicity, and ability to function as scaffolds for cell attachment, proliferation, and differentiation, which are difficult to imitate using synthetic materials. Here, we review the recent advances and possible future prospects for the advancement of dECM scaffolds for T/L tissue regeneration. We focus on crucial scaffold properties and functions, as well as various engineering strategies employed for biomaterial design in T/L regeneration. dECM provides both the physical and mechanical microenvironments required by cells to survive and proliferate. Various decellularization methods and sources of allogeneic and xenogeneic dECM in T/L repair and regeneration are critically discussed. Additionally, dECM hydrogels, bio-inks in 3D bioprinting, and nanofibers are briefly explored. Understanding the opportunities and challenges associated with dECM-based scaffold development is crucial for advancing T/L repairs in tissue engineering and regenerative medicine.
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Affiliation(s)
- Shabnam Anjum
- Department of Tissue Engineering, School of Intelligent Medicine, China Medical University, Shenyang 110122, China; NMPA Key Laboratory for Quality Research and Control of Tissue Regenerative Biomaterial, Institute of Regulatory Science for Medical Device, National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Ting Li
- Department of Laboratory Medicine, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, China
| | - Mohammad Saeed
- Dr. A.P.J Abdul Kalam Technical University, Lucknow 226031, India
| | - Qiang Ao
- Department of Tissue Engineering, School of Intelligent Medicine, China Medical University, Shenyang 110122, China; NMPA Key Laboratory for Quality Research and Control of Tissue Regenerative Biomaterial, Institute of Regulatory Science for Medical Device, National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China.
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Data K, Kulus M, Ziemak H, Chwarzyński M, Piotrowska-Kempisty H, Bukowska D, Antosik P, Mozdziak P, Kempisty B. Decellularization of Dense Regular Connective Tissue-Cellular and Molecular Modification with Applications in Regenerative Medicine. Cells 2023; 12:2293. [PMID: 37759515 PMCID: PMC10528602 DOI: 10.3390/cells12182293] [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: 07/13/2023] [Revised: 08/31/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
Healing of dense regular connective tissue, due to a high fiber-to-cell ratio and low metabolic activity and regeneration potential, frequently requires surgical implantation or reconstruction with high risk of reinjury. An alternative to synthetic implants is using bioscaffolds obtained through decellularization, a process where the aim is to extract cells from the tissue while preserving the tissue-specific native molecular structure of the ECM. Proteins, lipids, nucleic acids and other various extracellular molecules are largely involved in differentiation, proliferation, vascularization and collagen fibers deposit, making them the crucial processes in tissue regeneration. Because of the multiple possible forms of cell extraction, there is no standardized protocol in dense regular connective tissue (DRCT). Many modifications of the structure, shape and composition of the bioscaffold have also been described to improve the therapeutic result following the implantation of decellularized connective tissue. The available data provide a valuable source of crucial information. However, the wide spectrum of decellularization makes it important to understand the key aspects of bioscaffolds relative to their potential use in tissue regeneration.
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Affiliation(s)
- Krzysztof Data
- Division of Anatomy, Department of Human Morphology and Embryology, Wroclaw Medical University, 50-368 Wroclaw, Poland
| | - Magdalena Kulus
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Hanna Ziemak
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Mikołaj Chwarzyński
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Hanna Piotrowska-Kempisty
- Department of Toxicology, Poznan University of Medical Sciences, 60-631 Poznan, Poland
- Department of Basic and Preclinical Sciences, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Dorota Bukowska
- Department of Diagnostics and Clinical Sciences, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Paweł Antosik
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Paul Mozdziak
- Physiolgy Graduate Faculty, North Carolina State University, Raleigh, NC 27695, USA
- Prestage Department of Poultry Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Bartosz Kempisty
- Division of Anatomy, Department of Human Morphology and Embryology, Wroclaw Medical University, 50-368 Wroclaw, Poland
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
- Physiolgy Graduate Faculty, North Carolina State University, Raleigh, NC 27695, USA
- Department of Obstetrics and Gynecology, University Hospital and Masaryk University, 601 77 Brno, Czech Republic
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Santos ADL, Silva CGD, Barreto LSDS, Tamaoki MJS, Almeida FGD, Faloppa F. Automated Assessment of Cell Infiltration and Removal in Decellularized Scaffolds - Experimental Study in Rabbits. Rev Bras Ortop 2022; 57:992-1000. [PMID: 36540747 PMCID: PMC9757977 DOI: 10.1055/s-0041-1739174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 06/25/2021] [Indexed: 10/19/2022] Open
Abstract
Objective Semiquantitative and automated measurement of nuclear material removal and cell infiltration in decellularized tendon scaffolds (DTSs). Method 16 pure New Zealand rabbits were used, and the gastrocnemius muscle tendon was collected bilaterally from half of these animals (16 tendons collected); 4 were kept as control and 12 were submitted to the decellularization protocol (DTS). Eight of the DTSs were used as an in vivo implant in the experimental rotator cuff tear (RCT) model, and the rest, as well as the controls, were used in the semiquantitative and automated evaluation of nuclear material removal. The eight additional rabbits were used to make the experimental model of RCT and subsequent evaluation of cellular infiltration after 2 or 8 weeks, within the DTS. Results The semiquantitative and automated analysis used demonstrated a removal of 79% of nuclear material ( p < 0.001 and power > 99%) and a decrease of 88% (p < 0.001 and power >99%) in the area occupied by nuclear material after the decellularization protocol. On cell infiltration in DTS, an increase of 256% (p < 0.001 and power >99%) in the number of cells within the DTS was observed in the comparison between 2 and 8 weeks postoperatively. Conclusion The proposed semiquantitative and automated measurement method was able to objectively measure the removal of nuclear material and cell infiltration in DTS.
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Affiliation(s)
- Alex de Lima Santos
- Departamento de Ortopedia e Traumatologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil
| | - Camila Gonzaga da Silva
- Departamento de Cirurgia, Escola Paulista de Medicina, Universidade Federal de São Paulo, SP, Brasil
| | | | - Marcel Jun Sugawara Tamaoki
- Departamento de Ortopedia e Traumatologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil
| | | | - Flavio Faloppa
- Departamento de Ortopedia e Traumatologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil
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Al-Hakim Khalak F, García-Villén F, Ruiz-Alonso S, Pedraz JL, Saenz-del-Burgo L. Decellularized Extracellular Matrix-Based Bioinks for Tendon Regeneration in Three-Dimensional Bioprinting. Int J Mol Sci 2022; 23:12930. [PMID: 36361719 PMCID: PMC9657326 DOI: 10.3390/ijms232112930] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/23/2022] [Accepted: 10/24/2022] [Indexed: 11/08/2023] Open
Abstract
In the last few years, attempts to improve the regeneration of damaged tendons have been rising due to the growing demand. However, current treatments to restore the original performance of the tissue focus on the usage of grafts; although, actual grafts are deficient because they often cannot provide enough support for tissue regeneration, leading to additional complications. The beneficial effect of combining 3D bioprinting and dECM as a novel bioink biomaterial has recently been described. Tendon dECMs have been obtained by using either chemical, biological, or/and physical treatments. Although decellularization protocols are not yet standardized, recently, different protocols have been published. New therapeutic approaches embrace the use of dECM in bioinks for 3D bioprinting, as it has shown promising results in mimicking the composition and the structure of the tissue. However, major obstacles include the poor structural integrity and slow gelation properties of dECM bioinks. Moreover, printing parameters such as speed and temperature have to be optimized for each dECM bioink. Here, we show that dECM bioink for 3D bioprinting provides a promising approach for tendon regeneration for future clinical applications.
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Affiliation(s)
- Fouad Al-Hakim Khalak
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), 01006 Vitoria-Gasteiz, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Health Institute Carlos III, Monforte de Lemos 3-5, 28029 Madrid, Spain
- Bioaraba Health Research Institute, Jose Atxotegi, s/n, 01009 Vitoria-Gasteiz, Spain
| | - Fátima García-Villén
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), 01006 Vitoria-Gasteiz, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Health Institute Carlos III, Monforte de Lemos 3-5, 28029 Madrid, Spain
- Bioaraba Health Research Institute, Jose Atxotegi, s/n, 01009 Vitoria-Gasteiz, Spain
| | - Sandra Ruiz-Alonso
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), 01006 Vitoria-Gasteiz, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Health Institute Carlos III, Monforte de Lemos 3-5, 28029 Madrid, Spain
- Bioaraba Health Research Institute, Jose Atxotegi, s/n, 01009 Vitoria-Gasteiz, Spain
| | - José Luis Pedraz
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), 01006 Vitoria-Gasteiz, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Health Institute Carlos III, Monforte de Lemos 3-5, 28029 Madrid, Spain
- Bioaraba Health Research Institute, Jose Atxotegi, s/n, 01009 Vitoria-Gasteiz, Spain
| | - Laura Saenz-del-Burgo
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), 01006 Vitoria-Gasteiz, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Health Institute Carlos III, Monforte de Lemos 3-5, 28029 Madrid, Spain
- Bioaraba Health Research Institute, Jose Atxotegi, s/n, 01009 Vitoria-Gasteiz, Spain
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Wang L, Zhu T, Kang Y, Zhang J, Du J, Gao H, Chen S, Jiang J, Zhao J. Crimped nanofiber scaffold mimicking tendon-to-bone interface for fatty-infiltrated massive rotator cuff repair. Bioact Mater 2022; 16:149-161. [PMID: 35386329 PMCID: PMC8958472 DOI: 10.1016/j.bioactmat.2022.01.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 01/16/2022] [Accepted: 01/17/2022] [Indexed: 12/11/2022] Open
Abstract
Electrospun fibers, with proven ability to promote tissue regeneration, are widely being explored for rotator cuff repairing. However, without post treatment, the microstructure of the electrospun scaffold is vastly different from that of natural extracellular matrix (ECM). Moreover, during mechanical loading, the nanofibers slip that hampers the proliferation and differentiation of migrating stem cells. Here, electrospun nanofiber scaffolds, with crimped nanofibers and welded joints to biomimic the intricate natural microstructure of tendon-to-bone insertion, were prepared using poly(ester-urethane)urea and gelatin via electrospinning and double crosslinking by a multi-bonding network densification strategy. The crimped nanofiber scaffold (CNS) features bionic tensile stress and induces chondrogenic differentiation, laying credible basis for in vivo experimentation. After repairing a rabbit massive rotator cuff tear using a CNS for 3 months, the continuous translational tendon-to-bone interface was fully regenerated, and fatty infiltration was simultaneously inhibited. Instead of micro-CT, μCT was employed to visualize the integrity and intricateness of the three-dimensional microstructure of the CNS-induced-healed tendon-to-bone interface at an ultra-high resolution of less than 1 μm. This study sheds light on the correlation between nanofiber post treatment and massive rotator cuff repair and provides a general strategy for crimped nanofiber preparation and tendon-to-bone interface imaging characterization. Electrospun scaffold mimicking the microstructure of ECM was fabricated. The translational microstructure of tendon-to-bone interface was regenerated. Tendon-to-bone interface was 3D visualized with resolution less than 1 μm. Muscle fatty infiltration was inhibited for massive rotator cuff tear.
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Affiliation(s)
- Liren Wang
- Department of Sports Medicine, Department of Orthopedics, Shanghai Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, No. 600 Yishan Road, Shanghai, 200233, China.,Regenerative Sports Medicine and Translational Youth Science and Technology Innovation Workroom, Shanghai Jiao Tong University School of Medicine, No. 227 South Chongqing Road, Shanghai, 200025, China
| | - Tonghe Zhu
- Department of Sports Medicine, Department of Orthopedics, Shanghai Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, No. 600 Yishan Road, Shanghai, 200233, China
| | - Yuhao Kang
- Department of Sports Medicine, Department of Orthopedics, Shanghai Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, No. 600 Yishan Road, Shanghai, 200233, China.,Regenerative Sports Medicine and Translational Youth Science and Technology Innovation Workroom, Shanghai Jiao Tong University School of Medicine, No. 227 South Chongqing Road, Shanghai, 200025, China
| | - Jianguang Zhang
- Department of Medgen Group Research Laboratory, 18 Qinglan 3 Rd, Shenzhen, 518118, China
| | - Juan Du
- Biofunctional Materials Research Group, College of Chemistry and Chemical Engineering, Multidisciplinary Center for Advanced Materials, Institute of Advanced Studies, Shanghai University of Engineering Science, No. 333 Longteng Rd, Shanghai, 201620, China
| | - Haihan Gao
- Biofunctional Materials Research Group, College of Chemistry and Chemical Engineering, Multidisciplinary Center for Advanced Materials, Institute of Advanced Studies, Shanghai University of Engineering Science, No. 333 Longteng Rd, Shanghai, 201620, China.,Shanghai Jiao Tong University School of Medicine, No. 227 South Chongqing Road, Shanghai, 200025, China
| | - Sihao Chen
- Biofunctional Materials Research Group, College of Chemistry and Chemical Engineering, Multidisciplinary Center for Advanced Materials, Institute of Advanced Studies, Shanghai University of Engineering Science, No. 333 Longteng Rd, Shanghai, 201620, China
| | - Jia Jiang
- Department of Sports Medicine, Department of Orthopedics, Shanghai Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, No. 600 Yishan Road, Shanghai, 200233, China.,Regenerative Sports Medicine Lab of the Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People' Hospital, No. 600 Yishan Road, Shanghai, 200233, China
| | - Jinzhong Zhao
- Department of Sports Medicine, Department of Orthopedics, Shanghai Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, No. 600 Yishan Road, Shanghai, 200233, China.,Regenerative Sports Medicine Lab of the Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People' Hospital, No. 600 Yishan Road, Shanghai, 200233, China
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Santos ADL, Silva CGD, Barreto LSDS, Tamaoki MJS, Pereira BF, Almeida FGD, Faloppa F. Tratamento da lesão muscular com células-tronco – Estudo experimental em coelhos. Rev Bras Ortop 2022; 57:788-794. [PMID: 36226213 PMCID: PMC9550364 DOI: 10.1055/s-0041-1741447] [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: 06/26/2021] [Accepted: 09/20/2021] [Indexed: 10/28/2022] Open
Abstract
Resumo
Objetivo Avaliação histológica e macroscópica do processo de cicatrização das lesões agudas do músculo reto femoral, com utilização de células-tronco derivadas de tecido adiposo (ADSCs, na sigla em inglês).
Método Foi realizado um estudo experimental com 18 patas traseiras de coelhos Nova Zelândia, que foram divididos em três nos grupos de estudo de acordo com a intervenção a ser realizada. No grupo I não foi realizado procedimento cirúrgico; no grupo II - SHAN foi realizado a lesão experimental sem nenhum protocolo de intervenção adicional; e no grupo III - Intervenção foi realizado a adição de ADSCs na mesma topografia onde foi realizada a lesão experimental. Após o período proposto, 2 semanas, o material foi coletado, submetido a avaliação macroscópica e histológica.
Resultados A análise quantitativa demonstrou que a adição de ADSCs está relacionada com a diminuição de células inflamatórias na avaliação com 2 semanas (164,2 células no grupo II - SHAN para 89,62 células no grupo III – ADSC). A análise qualitativa das lâminas coradas com Picrosírius red demonstrou um aumento das fibras de cor laranja/amarela no grupo III – ADSC, o que evidencia um processo final de cicatrização. A avaliação macroscópica não encontrou diferença entre os grupos.
Conclusão A utilização de ADSCs no tratamento de lesão muscular aguda apresentou vantagens histológicas quando comparada a sua não utilização.
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Affiliation(s)
- Alex de Lima Santos
- Departamento de Ortopedia e Traumatologia da Escola Paulista de Medicina da Universidade Federal de São Paulo, São Paulo, SP, Brasil
| | - Camila Gonzaga da Silva
- Departamento de Cirurgia da Escola Paulista de Medicina da Universidade Federal de São Paulo, São Paulo, Brasil
| | | | - Marcel Jun Sugawara Tamaoki
- Departamento de Ortopedia e Traumatologia da Escola Paulista de Medicina da Universidade Federal de São Paulo, São Paulo, SP, Brasil
| | | | | | - Flavio Faloppa
- Departamento de Ortopedia e Traumatologia da Escola Paulista de Medicina da Universidade Federal de São Paulo, São Paulo, SP, Brasil
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