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Bian S, Hu X, Zhu H, Du W, Wang C, Wang L, Hao L, Xiang Y, Meng F, Hu C, Wu Z, Wang J, Pan X, Guan M, Lu WW, Zhao X. 3D Bioprinting of Artificial Skin Substitute with Improved Mechanical Property and Regulated Cell Behavior through Integrating Patterned Nanofibrous Films. ACS NANO 2024; 18:18503-18521. [PMID: 38941540 DOI: 10.1021/acsnano.4c04088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/30/2024]
Abstract
Three-dimensional (3D) bioprinting has advantages for constructing artificial skin tissues in replicating the structures and functions of native skin. Although many studies have presented improved effect of printing skin substitutes in wound healing, using hydrogel inks to fabricate 3D bioprinting architectures with complicated structures, mimicking mechanical properties, and appropriate cellular environments is still challenging. Inspired by collagen nanofibers withstanding stress and regulating cell behavior, a patterned nanofibrous film was introduced to the printed hydrogel scaffold to fabricate a composite artificial skin substitute (CASS). The artificial dermis was printed using gelatin-hyaluronan hybrid hydrogels containing human dermal fibroblasts with gradient porosity and integrated with patterned nanofibrous films simultaneously, while the artificial epidermis was formed by seeding human keratinocytes upon the dermis. The collagen-mimicking nanofibrous film effectively improved the tensile strength and fracture resistance of the CASS, making it sewable for firm implantation into skin defects. Meanwhile, the patterned nanofibrous film also provided the biological cues to guide cell behavior. Consequently, CASS could effectively accelerate the regeneration of large-area skin defects in mouse and pig models by promoting re-epithelialization and collagen deposition. This research developed an effective strategy to prepare composite bioprinting architectures for enhancing mechanical property and regulating cell behavior, and CASS could be a promising skin substitute for treating large-area skin defects.
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Affiliation(s)
- Shaoquan Bian
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiaohua Hu
- Department of Burns and Plastic Surgery, Beijing Jishuitan Hospital, Capital Medical University, Beijing 100035, P. R. China
| | - Hao Zhu
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
| | - Weili Du
- Department of Burns and Plastic Surgery, Beijing Jishuitan Hospital, Capital Medical University, Beijing 100035, P. R. China
| | - Chenmin Wang
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
| | - Liangliang Wang
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
| | - Liuzhi Hao
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Yuming Xiang
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
| | - Fengzhen Meng
- Institute of Clinical Translation and Regenerative Medicine, People's Hospital of Baoan District, The Second Affiliated Hospital of Shenzhen University, Shenzhen 518101, P. R. China
| | - Chengwei Hu
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zhiyun Wu
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jing Wang
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
| | - Xiaohua Pan
- Institute of Clinical Translation and Regenerative Medicine, People's Hospital of Baoan District, The Second Affiliated Hospital of Shenzhen University, Shenzhen 518101, P. R. China
| | - Min Guan
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - William Weijia Lu
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
- The University of Hong Kong, Hong Kong 999077, P. R. China
- Materials Innovation Institute for Life Sciences and Energy, The University of Hong Kong Shenzhen Institute of Research and Innovation, Shenzhen 518057, P. R. China
| | - Xiaoli Zhao
- Research Center for Human Tissues and Organs Degeneration, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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Greaney AM, Ramachandra AB, Yuan Y, Korneva A, Humphrey JD, Niklason LE. Decellularization compromises mechanical and structural properties of the native trachea. BIOMATERIALS AND BIOSYSTEMS 2023; 9:100074. [PMID: 36967724 PMCID: PMC10036236 DOI: 10.1016/j.bbiosy.2023.100074] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 01/01/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023] Open
Abstract
Tracheal replacement using tissue engineering technologies offers great potential to improve previously intractable clinical interventions, and interest in this area has increased in recent years. Many engineered airway constructs currently rely on decellularized native tracheas to serve as the scaffold for tissue repair. Yet, mechanical failure leading to airway narrowing and collapse remains a major cause of morbidity and mortality following clinical implantation of decellularized tracheal grafts. To understand better the factors contributing to mechanical failure in vivo, we characterized the histo-mechanical properties of tracheas following two different decellularization protocols, including one that has been used clinically. All decellularized tracheas deviated from native mechanical behavior, which may provide insights into observed in vivo graft failures. We further analyzed protein content by western blot and analyzed microstructure by histological staining and found that the specific method of decellularization resulted in significant differences in the depletion of proteoglycans and degradation of collagens I, II, III, and elastin. Taken together, this work demonstrates that the heterogeneous architecture and mechanical behavior of the trachea is severely compromised by decellularization. Such structural deterioration may contribute to graft failure clinically and limit the potential of decellularized native tracheas as viable long-term orthotopic airway replacements.
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Affiliation(s)
- Allison M. Greaney
- Department of Biomedical Engineering, Yale University, New Haven, CT 06511, USA
- Vascular Biology and Therapeutics Program, Yale School of Medicine, New Haven, CT 06511, USA
| | | | - Yifan Yuan
- Vascular Biology and Therapeutics Program, Yale School of Medicine, New Haven, CT 06511, USA
- Department of Anesthesiology, Yale School of Medicine, New Haven, CT 06510, USA
| | - Arina Korneva
- Department of Biomedical Engineering, Yale University, New Haven, CT 06511, USA
| | - Jay D. Humphrey
- Department of Biomedical Engineering, Yale University, New Haven, CT 06511, USA
- Vascular Biology and Therapeutics Program, Yale School of Medicine, New Haven, CT 06511, USA
| | - Laura E. Niklason
- Department of Biomedical Engineering, Yale University, New Haven, CT 06511, USA
- Vascular Biology and Therapeutics Program, Yale School of Medicine, New Haven, CT 06511, USA
- Department of Anesthesiology, Yale School of Medicine, New Haven, CT 06510, USA
- Humacyte Inc., Durham, NC 27713, USA
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Yang R, Wang R, Abbaspoor S, Rajan M, Turki Jalil A, Mahmood Saleh M, Wang W. In vitro and in vivo evaluation of hydrogel-based scaffold for bone tissue engineering application. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023] Open
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Ravanbakhsh H, Bao G, Luo Z, Mongeau LG, Zhang YS. Composite Inks for Extrusion Printing of Biological and Biomedical Constructs. ACS Biomater Sci Eng 2021; 7:4009-4026. [PMID: 34510905 DOI: 10.1021/acsbiomaterials.0c01158] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Extrusion-based three-dimensional (3D) printing is an emerging technology for the fabrication of complex structures with various biological and biomedical applications. The method is based on the layer-by-layer construction of the product using a printable ink. The material used as the ink should possess proper rheological properties and desirable performances. Composite materials, which are extensively used in 3D printing applications, can improve the printability and offer superior performances for the printed constructs. Herein, we review composite inks with a focus on composite hydrogels. The properties of different additives including fibers and nanoparticles are discussed. The performances of various composite inks in biological and biomedical systems are delineated through analyzing the synergistic effects between the composite ink components. Different applications, including tissue engineering, tissue model engineering, soft robotics, and four-dimensional printing, are selected to demonstrate how 3D-printable composite inks are exploited to achieve various desired functionality. This review finally presents an outlook of future perspectives on the design of composite inks.
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Affiliation(s)
- Hossein Ravanbakhsh
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts 02139, United States.,Department of Mechanical Engineering, McGill University, Montreal, QC H3A0C3, Canada
| | - Guangyu Bao
- Department of Mechanical Engineering, McGill University, Montreal, QC H3A0C3, Canada
| | - Zeyu Luo
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts 02139, United States.,Department of Orthopedics, West China Hospital, West China School of Medicine, Sichuan University, Chengdu, Sichuan 610041, People's Republic of China
| | - Luc G Mongeau
- Department of Mechanical Engineering, McGill University, Montreal, QC H3A0C3, Canada
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts 02139, United States
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Ortega MA, Fraile-Martínez O, García-Montero C, Pekarek L, Alvarez-Mon MA, Guijarro LG, Del Carmen Boyano M, Sainz F, Álvarez-Mon M, Buján J, García-Honduvilla N, Asúnsolo Á. Tissue remodelling and increased DNA damage in patients with incompetent valves in chronic venous insufficiency. J Cell Mol Med 2021; 25:7878-7889. [PMID: 34148301 PMCID: PMC8358866 DOI: 10.1111/jcmm.16711] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 05/20/2021] [Accepted: 05/24/2021] [Indexed: 01/21/2023] Open
Abstract
Chronic venous insufficiency (CVI), in which blood return to the heart is impaired, is a prevalent condition worldwide. Valve incompetence is a complication of CVI that results in blood reflux, thereby aggravating venous hypertension. While CVI has a complex course and is known to produce alterations in the vein wall, the underlying pathological mechanisms remain unclear. This study examined the presence of DNA damage, pro‐inflammatory cytokines and extracellular matrix remodelling in CVI‐related valve incompetence. One hundred and ten patients with CVI were reviewed and divided into four groups according to age (<50 and ≥50 years) and a clinical diagnosis of venous reflux indicating venous system valve incompetence (R) (n = 81) or no reflux (NR) (n = 29). In vein specimens (greater saphenous vein) from each group, PARP, IL‐17, COL‐I, COL‐III, MMP‐2 and TIMP‐2 expression levels were determined by RT‐qPCR and immunohistochemistry. The younger patients with valve incompetence showed significantly higher PARP, IL‐17, COL‐I, COL‐III, MMP‐2 and reduced TIMP‐2 expression levels and a higher COL‐I/III ratio. Young CVI patients with venous reflux suffer chronic DNA damage, with consequences at both the local tissue and systemic levels, possibly associated with ageing.
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Affiliation(s)
- Miguel A Ortega
- Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, Spain.,Ramón y Cajal Institute of Healthcare Research (IRYCIS), Madrid, Spain.,Cancer Registry and Pathology Department, Hospital Universitario Principe de Asturias, Alcalá de Henares, Spain
| | - Oscar Fraile-Martínez
- Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, Spain
| | - Cielo García-Montero
- Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, Spain
| | - Leonel Pekarek
- Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, Spain
| | - Miguel A Alvarez-Mon
- Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, Spain.,Ramón y Cajal Institute of Healthcare Research (IRYCIS), Madrid, Spain
| | - Luis G Guijarro
- Ramón y Cajal Institute of Healthcare Research (IRYCIS), Madrid, Spain.,Unit of Biochemistry and Molecular Biology, Department of System Biology, University of Alcala, Alcalá de Henares, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Barcelona, Spain
| | - Maria Del Carmen Boyano
- Unit of Biochemistry and Molecular Biology, Department of System Biology, University of Alcala, Alcalá de Henares, Spain
| | - Felipe Sainz
- Department of Surgery, Medical and Social Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, Spain.,Angiology and Vascular Surgery Service, Central University Hospital of Defence-UAH Madrid, Alcalá de Henares, Spain
| | - Melchor Álvarez-Mon
- Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, Spain.,Ramón y Cajal Institute of Healthcare Research (IRYCIS), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Barcelona, Spain.,Immune System Diseases-Rheumatology, Oncology Service and Internal Medicine, University Hospital Príncipe de Asturias, Alcalá de Henares, Spain
| | - Julia Buján
- Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, Spain.,Ramón y Cajal Institute of Healthcare Research (IRYCIS), Madrid, Spain
| | - Natalio García-Honduvilla
- Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, Spain.,Ramón y Cajal Institute of Healthcare Research (IRYCIS), Madrid, Spain
| | - Ángel Asúnsolo
- Ramón y Cajal Institute of Healthcare Research (IRYCIS), Madrid, Spain.,Unit of Biochemistry and Molecular Biology, Department of System Biology, University of Alcala, Alcalá de Henares, Spain.,Department of Epidemiology and Biostatistics, Graduate School of Public Health and Health Policy, The City University of New York, New York, NY, USA
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6
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Abstract
Defined by its potential for self-renewal, differentiation and tumorigenicity, cancer stem cells (CSCs) are considered responsible for drug resistance and relapse. To understand the behavior of CSC, the effects of the microenvironment in each tissue are a matter of great concerns for scientists in cancer biology. However, there are many complicated obstacles in the mimicking the microenvironment of CSCs even with current advanced technology. In this context, novel biomaterials have widely been assessed as in vitro platforms for their ability to mimic cancer microenvironment. These efforts should be successful to identify and characterize various CSCs specific in each type of cancer. Therefore, extracellular matrix scaffolds made of biomaterial will modulate the interactions and facilitate the investigation of CSC associated with biological phenomena simplifying the complexity of the microenvironment. In this review, we summarize latest advances in biomaterial scaffolds, which are exploited to mimic CSC microenvironment, and their chemical and biological requirements with discussion. The discussion includes the possible effects on both cells in tumors and microenvironment to propose what the critical factors are in controlling the CSC microenvironment focusing the future investigation. Our insights on their availability in drug screening will also follow the discussion.
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Silk fibroin/collagen 3D scaffolds loaded with TiO2 nanoparticles for skin tissue regeneration. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03475-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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8
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Angiogenic Potential in Biological Hydrogels. Biomedicines 2020; 8:biomedicines8100436. [PMID: 33092064 PMCID: PMC7589931 DOI: 10.3390/biomedicines8100436] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/02/2020] [Accepted: 10/16/2020] [Indexed: 12/19/2022] Open
Abstract
Hydrogels are three-dimensional (3D) materials able to absorb and retain water in large amounts while maintaining their structural stability. Due to their considerable biocompatibility and similarity with the body’s tissues, hydrogels are one of the most promising groups of biomaterials. The main application of these hydrogels is in regenerative medicine, in which they allow the formation of an environment suitable for cell differentiation and growth. Deriving from these hydrogels, it is, therefore, possible to obtain bioactive materials that can regenerate tissues. Because vessels guarantee the right amount of oxygen and nutrients but also assure the elimination of waste products, angiogenesis is one of the processes at the base of the regeneration of a tissue. On the other hand, it is a very complex mechanism and the parameters to consider are several. Indeed, the factors and the cells involved in this process are numerous and, for this reason, it has been a challenge to recreate a biomaterial able to adequately sustain the angiogenic process. However, in this review the focal point is the application of natural hydrogels in angiogenesis enhancing and their potential to guide this process.
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Zaffar M, Pradhan A. Mapping of retardance, diattenuation and polarizance vector on Poincare sphere for diagnosis and classification of cervical precancer. JOURNAL OF BIOPHOTONICS 2020; 13:e201960139. [PMID: 31943767 DOI: 10.1002/jbio.201960139] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 01/07/2020] [Accepted: 01/08/2020] [Indexed: 06/10/2023]
Abstract
The mapping of diattenuation, polarizance and retardance vector (normalized Stokes vector) on Poincare sphere, evaluated from Mueller matrix of optically anisotropic stromal region of cervical tissues, is presented for cervical precancer detection and its staging. This reveals that the changes in the polarization states shown by these normalized Stokes vectors corresponds to the degradation of linearly arranged collagen fibers, breakage of the collagen cross links in the stromal region and change in the density of scattering sites when cervical cancer evolves. The distinct nature of real and imaginary parts of the refractive index for linear, linear-45 and circular polarization from the optically anisotropic stromal region underscore the various polarization structures of the connective tissue region which get modified during the pathological changes. It has been found that versatility of these vectors for normal and precancerous cervical tissue of various grades may be utilized as a key distinction for qualitative staging of cervical precancer tissue. Quantitative classification of precancerous stages of cervical precancer has been determined with 95%-100% sensitivity and 93%-100% specificity through the evaluation of linear and circular diattenuation, linear polarizance and linear birefringence from the components of the respective vectors.
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Affiliation(s)
- Mohammad Zaffar
- Department of Physics, Indian Institute of Technology Kanpur, Kanpur, India
| | - Asima Pradhan
- Department of Physics, Indian Institute of Technology Kanpur, Kanpur, India
- Centre for Laser and Photonics, Indian Institute of Technology Kanpur, Kanpur, India
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10
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Feng H, Li X, Deng X, Li X, Guo J, Ma K, Jiang B. The lamellar structure and biomimetic properties of a fish scale matrix. RSC Adv 2020; 10:875-885. [PMID: 35494441 PMCID: PMC9046992 DOI: 10.1039/c9ra08189e] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 12/10/2019] [Indexed: 02/05/2023] Open
Abstract
The chemical composition of scaffolds is similar to the extracellular matrix of the target tissue, but sometimes scaffolds cannot meet the special functional requirements for the initial stage of engineering tissue, such as mechanical and optical properties. Bionic scaffolds require certain levels of supramolecular structure, textile structure and liquid crystal structure. Here, we will focus our attention on animal tissues with a similar high-level structure to that of the target organization and we hope to achieve the desired results through new technical means. In this study, we have developed a method to obtain a fish scale lamellar matrix from grass carp scales. The fine structure of the scale matrix has been studied, and it was found that the grass carp scale matrix is a textured structure consisting of multiple collagen sheets, which have a double-twisted spiral structure similar to a liquid crystal, thus correcting the literature reports of a single twisted spiral structure. Interestingly, this structure has many similarities with the cornea, cementum and tibial matrix. At the same time, the correlation between the etching time and the optical properties of the scaffold was also studied, and the scale matrix can reach light transmission and refraction levels similar to those of the corneal stroma. Moreover, the matrix has good mechanical properties, in vitro anti-enzymatic abilities and compatibility with human corneal epithelial cells. Therefore, this kind of scaffold material and preparation method, with a lamellar structure and special physical parameters, may provide new hope for corneal prosthesis.
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Affiliation(s)
- Huanhuan Feng
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
| | - Xia Li
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
| | - Xiaoming Deng
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
| | - Xiaolei Li
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
| | - Jitong Guo
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
| | - Ke Ma
- Ophthalmology Department, West China Hospital, Sichuan University Chengdu 610041 P. R. China
| | - Bo Jiang
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
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Comparison of two different laser photobiomodulation protocols on the viability of random skin flap in rats. Lasers Med Sci 2018; 34:1041-1047. [PMID: 30565200 DOI: 10.1007/s10103-018-2694-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 11/22/2018] [Indexed: 01/20/2023]
Abstract
To identify the best low level laser photobiomodulation application site at the same irradiation time to increase the viability of the skin flap in rats. Eighteen male rats (Rattus norvegicus: var. Albinus, Rodentia Mammalia) were randomly distributed into three groups (n = 6). Group I (GI) was submitted to simulated laser photobiomodulation; group II (GII) was submitted to laser photobiomodulation at three points in the flap cranial base, and group III (GIII) was submitted to laser photobiomodulation at 12 points distributed along the flap. All groups were irradiated with an Indium, Galium, Aluminum, and Phosphorus diode laser (InGaAlP), 660 nm, with 50 mW power, irradiated for a total time of 240 s in continuous emission mode. The treatment started immediately after performing the cranial base random skin flap (10 × 4 cm2 dimension) and reapplied every 24 h, with a total of five applications. The animals were euthanized after the evaluation of the percentage of necrosis area, and the material was collected for histological analysis on the seventh postoperative day. GII animals presented a statistically significant decrease for the necrosis area when compared to the other groups, and a statistically significant increase in the quantification of collagen when compared to the control. We did not observe a statistical difference between the TGFβ and FGF expression in the different groups evaluated. The application of laser photobiomodulation at three points of the flap cranial base was more effective than at 12 points regarding the reduction of necrosis area.
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12
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In vitro fibrillogenesis of tropocollagen type III in collagen type I affects its relative fibrillar topology and mechanics. Sci Rep 2017; 7:1392. [PMID: 28469139 PMCID: PMC5431193 DOI: 10.1038/s41598-017-01476-y] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 03/27/2017] [Indexed: 01/19/2023] Open
Abstract
Tropocollagen types I and III were simultaneously fibrilized in vitro, and the differences between the geometric and mechanical properties of the heterotypic fibrils with different mixing ratios of tropocollagen III to I were investigated. Transmission electron microscopy was used to confirm the simultaneous presence of both tropocollagen types within the heterotypic fibrils. The incorporation of collagen III in I caused the fibrils to be thinner with a shorter D-banding than pure collagen I. Hertzian contact model was used to obtain the elastic moduli from atomic force microscope indentation testing using a force volume analysis. The results indicated that an increase in the percentage of tropocollagen III reduced the mechanical stiffness of the obtained fibrils. The mechanical stiffness of the collagen fibrils was found to be greater at higher loading frequencies. This observation might explain the dominance of collagen III over I in soft distensible organs such as human vocal folds.
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13
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Aibibu D, Hild M, Wöltje M, Cherif C. Textile cell-free scaffolds for in situ tissue engineering applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:63. [PMID: 26800694 PMCID: PMC4723636 DOI: 10.1007/s10856-015-5656-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 12/20/2015] [Indexed: 05/12/2023]
Abstract
In this article, the benefits offered by micro-fibrous scaffold architectures fabricated by textile manufacturing techniques are discussed: How can established and novel fiber-processing techniques be exploited in order to generate templates matching the demands of the target cell niche? The problems related to the development of biomaterial fibers (especially from nature-derived materials) ready for textile manufacturing are addressed. Attention is also paid on how biological cues may be incorporated into micro-fibrous scaffold architectures by hybrid manufacturing approaches (e.g. nanofiber or hydrogel functionalization). After a critical review of exemplary recent research works on cell-free fiber based scaffolds for in situ TE, including clinical studies, we conclude that in order to make use of the whole range of favors which may be provided by engineered fibrous scaffold systems, there are four main issues which need to be addressed: (1) Logical combination of manufacturing techniques and materials. (2) Biomaterial fiber development. (3) Adaption of textile manufacturing techniques to the demands of scaffolds for regenerative medicine. (4) Incorporation of biological cues (e.g. stem cell homing factors).
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Affiliation(s)
- Dilbar Aibibu
- Technische Universität Dresden, Fakultät Maschinenwesen, Institut für Textilmaschinen und Textile Hochleistungswerkstofftechnik, 01062, Dresden, Germany.
| | - Martin Hild
- Technische Universität Dresden, Fakultät Maschinenwesen, Institut für Textilmaschinen und Textile Hochleistungswerkstofftechnik, 01062, Dresden, Germany
| | - Michael Wöltje
- Technische Universität Dresden, Fakultät Maschinenwesen, Institut für Textilmaschinen und Textile Hochleistungswerkstofftechnik, 01062, Dresden, Germany
| | - Chokri Cherif
- Technische Universität Dresden, Fakultät Maschinenwesen, Institut für Textilmaschinen und Textile Hochleistungswerkstofftechnik, 01062, Dresden, Germany
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Zhang S, Prabhakaran MP, Qin X, Ramakrishna S. Biocomposite scaffolds for bone regeneration: Role of chitosan and hydroxyapatite within poly-3-hydroxybutyrate-co-3-hydroxyvalerate on mechanical properties and in vitro evaluation. J Mech Behav Biomed Mater 2015; 51:88-98. [DOI: 10.1016/j.jmbbm.2015.06.032] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 06/25/2015] [Accepted: 06/27/2015] [Indexed: 10/23/2022]
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Effect of aqueous ethanol on the triple helical structure of collagen. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2014; 43:643-52. [PMID: 25376150 DOI: 10.1007/s00249-014-0994-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 10/15/2014] [Accepted: 10/19/2014] [Indexed: 10/24/2022]
Abstract
Collagen, the most abundant protein in mammals, is widely used for making biomaterials. Recently, organic solvents have been used to fabricate collagen-based biomaterials for biological applications. It is therefore necessary to understand the behavior of collagen in the presence of organic solvents at low (≤50%, v/v) and high (≥90%, v/v) concentrations. This study was conducted to examine how collagen reacts when exposed to low and high concentrations of ethanol, one of the solvents used to make collagen-based biomaterials. Solubility testing indicated that collagen remains in solution at low concentrations (≤50%, v/v) of ethanol but precipitates (gel-like) thereafter, irrespective of the method of addition of ethanol (single shot or gradual addition); this behavior is different from that observed recently with acetonitrile. Collagen retains its triple helix in the presence of ethanol but becomes thermodynamically unstable, with substantially reduced melting temperature, with increasing concentration of ethanol. It was also found that the CD ellipticity at 222 nm, characteristic of the triple-helical structure, does not correlate with the thermal stability of collagen. Time-dependent experiments reveal that the collagen triple helix is kinetically stable in the presence of 0-40% (v/v) ethanol at low temperature (5 °C) but highly unstable in the presence of ethanol at elevated temperature (~34 °C). These results indicate that when ethanol is used to process collagen-based biomaterials, such factors as temperature and duration should be done taking into account, to prevent extensive damage to the triple-helical structure of collagen.
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Martignago CCS, Oliveira RF, Pires-Oliveira DAA, Oliveira PD, Pacheco Soares C, Monzani PS, Poli-Frederico RC. Effect of low-level laser therapy on the gene expression of collagen and vascular endothelial growth factor in a culture of fibroblast cells in mice. Lasers Med Sci 2014; 30:203-8. [PMID: 25171833 DOI: 10.1007/s10103-014-1644-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 08/21/2014] [Indexed: 01/16/2023]
Abstract
Low-level laser therapy treatment (LLLT) is widely used in rehabilitation clinics with the aim of accelerating the process of tissue repair; however, the molecular bases of the effect of LLLT have not been fully established. The aim of the present study was to evaluate the influence of the exposure of different doses of LLLT on the expression of collagen genes type I alpha 1 (COL1α1) and vascular endothelial growth factor (VEGF) in the fibroblast cells of mice (L929) cultivated in vitro. Fibroblast cells were irradiated with a Gallium-Arsenide laser (904 nm) every 24 h for 2 consecutive days, stored in an oven at 37 °C, with 5% CO2 and divided into 3 groups: G1-control group, G2-irradiated at 2 J/cm(2), and G3-irradiated at 3 J/cm(2). After irradiation, the total RNA was extracted and used in the complementary DNA (cDNA) synthesis. The gene expression was analyzed by real-time polymerase chain reaction. The cells irradiated in G2 exhibited a statistically significant growth of 1.78 in the expression of the messenger RNA (mRNA) of the COL1α1 gene (p = 0.036) in comparison with G1 and G3. As for the VEGF gene, an increase in expression was observed in the two irradiated groups in comparison with the control group. There was an increase in expression in G2 of 2.054 and G3 of 2.562 (p = 0.037) for this gene. LLLT (904 nm) had an influence on the expression of the genes COL1α1 (2 J/cm(2)) and VEGF (2 e 3 J/cm(2)) in a culture of the fibroblast cells of mice.
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Affiliation(s)
- C C S Martignago
- Rehabilitation Science, North Paraná University (UNOPAR), Londrina, Paraná, Brazil
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Prabhakaran MP, Mobarakeh LG, Kai D, Karbalaie K, Nasr-Esfahani MH, Ramakrishna S. Differentiation of embryonic stem cells to cardiomyocytes on electrospun nanofibrous substrates. J Biomed Mater Res B Appl Biomater 2013; 102:447-54. [PMID: 24039141 DOI: 10.1002/jbm.b.33022] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2012] [Revised: 06/24/2013] [Accepted: 08/01/2013] [Indexed: 12/31/2022]
Abstract
The potential of pluripotent embryonic stem cells (ESCs) isolated from the inner mass of blastocysts are investigated for its ability to differentiate on biocompatible electrospun nanofibers, for regeneration of the myocardially infracted heart. Nanostructured poly(d,l-lactide-co-glycolide)/collagen (PLGA/Col) scaffolds with fiber diameters in the range of 300 ± 65 nm, was fabricated by electrospinning to mimic the extracellular matrix of the native tissue. During the culture of embryoid bodies outgrowth on the scaffolds, and further differentiation of ESCs to cardiomyocytes, the PLGA/Col nanofibers was found better than that of the electrospun PLGA nanofibers, where a better interaction and growth of ESC differentiated cardiomyocytes was observed on the composite scaffolds. The phenotypical characteristics of ESC-derived cardiomyocytes and molecular protein expression were carried out by scanning electron microscopy and immunocytochemistry, respectively. Our studies highlight the significance of a suitable material, its architecture, and cell-biomaterial interactions that is essential at a nanoscale level signifying the application of a bioengineered cardiac graft for stem cell differentiation and transplantation, which could be an intriguing strategy for cardiac regeneration.
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Affiliation(s)
- Molamma P Prabhakaran
- Center for Nanofibers and Nanotechnology, E3-05-14, Nanoscience and Nanotechnology Initiative, Faculty of Engineering, Singapore, 117576
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