1
|
Chen C, Wang B, Zhao X, Luo Y, Fu L, Qi X, Ying Z, Chen L, Wang Q, Sun S, Chen D, Kang P. Lithium Promotes Osteogenesis via Rab11a-Facilitated Exosomal Wnt10a Secretion and β-Catenin Signaling Activation. ACS APPLIED MATERIALS & INTERFACES 2024; 16:30793-30809. [PMID: 38833412 DOI: 10.1021/acsami.4c04199] [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: 06/06/2024]
Abstract
Both bone mesenchymal stem cells (BMSCs) and their exosomes suggest promising therapeutic tools for bone regeneration. Lithium has been reported to regulate BMSC function and engineer exosomes to improve bone regeneration in patients with glucocorticoid-induced osteonecrosis of the femoral head. However, the mechanisms by which lithium promotes osteogenesis have not been elucidated. Here, we demonstrated that lithium promotes the osteogenesis of BMSCs via lithium-induced increases in the secretion of exosomal Wnt10a to activate Wnt/β-catenin signaling, whose secretion is correlated with enhanced MARK2 activation to increase the trafficking of the Rab11a and Rab11FIP1 complexes together with exosomal Wnt10a to the plasma membrane. Then, we compared the proosteogenic effects of exosomes derived from lithium-treated or untreated BMSCs (Li-Exo or Con-Exo) both in vitro and in vivo. We found that, compared with Con-Exo, Li-Exo had superior abilities to promote the uptake and osteogenic differentiation of BMSCs. To optimize the in vivo application of these hydrogels, we fabricated Li-Exo-functionalized gelatin methacrylate (GelMA) hydrogels, which are more effective at promoting osteogenesis and bone repair than Con-Exo. Collectively, these findings demonstrate the mechanism by which lithium promotes osteogenesis and the great promise of lithium for engineering BMSCs and their exosomes for bone regeneration, warranting further exploration in clinical practice.
Collapse
Affiliation(s)
- Changjun Chen
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan 250014, China
| | - Baoning Wang
- Department of Microbiology, West China of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, China
| | - Xin Zhao
- Department of Orthopedic Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250014, China
| | - Yue Luo
- Department of Orthopedic Surgery, North Sichuan Medical College, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - Li Fu
- Research Core Facility, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xin Qi
- Department of Neurosurgery and Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Zhendong Ying
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan 250014, China
| | - Liyile Chen
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Qiuru Wang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Shuo Sun
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Dailing Chen
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan 250014, China
| | - Pengde Kang
- Department of Orthopedic Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
| |
Collapse
|
2
|
He Y, Cen Y, Tian M. Immunomodulatory hydrogels for skin wound healing: cellular targets and design strategy. J Mater Chem B 2024; 12:2435-2458. [PMID: 38284157 DOI: 10.1039/d3tb02626d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Skin wounds significantly impact the global health care system and represent a significant burden on the economy and society due to their complicated dynamic healing processes, wherein a series of immune events are required to coordinate normal and sequential healing phases, involving multiple immunoregulatory cells such as neutrophils, macrophages, keratinocytes, and fibroblasts, since dysfunction of these cells may impede skin wound healing presenting persisting inflammation, impaired vascularization, and excessive collagen deposition. Therefore, cellular target-based immunomodulation is promising to promote wound healing as cells are the smallest unit of life in immune response. Recently, immunomodulatory hydrogels have become an attractive avenue to promote skin wound healing. However, a detailed and comprehensive review of cellular targets and related hydrogel design strategies remains lacking. In this review, the roles of the main immunoregulatory cells participating in skin wound healing are first discussed, and then we highlight the cellular targets and state-of-the-art design strategies for immunomodulatory hydrogels based on immunoregulatory cells that cover defect, infected, diabetic, burn and tumor wounds and related scar healing. Finally, we discuss the barriers that need to be addressed and future prospects to boost the development and prosperity of immunomodulatory hydrogels.
Collapse
Affiliation(s)
- Yinhai He
- Department of Plastic and Burn Surgery, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Ying Cen
- Department of Plastic and Burn Surgery, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Meng Tian
- Department of Neurosurgery and Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, 610041, China.
| |
Collapse
|
3
|
Hao J, Bai B, Ci Z, Tang J, Hu G, Dai C, Yu M, Li M, Zhang W, Zhang Y, Ren W, Hua Y, Zhou G. Large-sized bone defect repair by combining a decalcified bone matrix framework and bone regeneration units based on photo-crosslinkable osteogenic microgels. Bioact Mater 2021; 14:97-109. [PMID: 35310359 PMCID: PMC8892219 DOI: 10.1016/j.bioactmat.2021.12.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 12/06/2021] [Accepted: 12/09/2021] [Indexed: 12/25/2022] Open
Abstract
Physiological repair of large-sized bone defects is great challenging in clinic due to a lack of ideal grafts suitable for bone regeneration. Decalcified bone matrix (DBM) is considered as an ideal bone regeneration scaffold, but low cell seeding efficiency and a poor osteoinductive microenvironment greatly restrict its application in large-sized bone regeneration. To address these problems, we proposed a novel strategy of bone regeneration units (BRUs) based on microgels produced by photo-crosslinkable and microfluidic techniques, containing both the osteogenic ingredient DBM and vascular endothelial growth factor (VEGF) for accurate biomimic of an osteoinductive microenvironment. The physicochemical properties of microgels could be precisely controlled and the microgels effectively promoted adhesion, proliferation, and osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) in vitro. BRUs were successfully constructed by seeding BMSCs onto microgels, which achieved reliable bone regeneration in vivo. Finally, by integrating the advantages of BRUs in bone regeneration and the advantages of DBM scaffolds in 3D morphology and mechanical strength, a BRU-loaded DBM framework successfully regenerated bone tissue with the desired 3D morphology and effectively repaired a large-sized bone defect of rabbit tibia. The current study developed an ideal bone biomimetic microcarrier and provided a novel strategy for bone regeneration and large-sized bone defect repair. The photo-crosslinkable microgels contained both osteogenic ingredient DBM powders and angiogenic growth factor VEGF. The photo-crosslinkable microgels effectively promote adhesion, proliferation, and osteogenic differentiation of BMSCs in vitro. Bone regeneration units (BRUs) successfully achieve reliable bone regeneration in vivo. The combination of DBM scaffold and BRUs successfully regenerate bone tissue with the desired 3D morphology and repair large-sized bone defect of rabbit tibia.
Collapse
|
4
|
Medrano-David D, Lopera AM, Londoño ME, Araque-Marín P. Formulation and Characterization of a New Injectable Bone Substitute Composed PVA/Borax/CaCO 3 and Demineralized Bone Matrix. J Funct Biomater 2021; 12:46. [PMID: 34449632 PMCID: PMC8395841 DOI: 10.3390/jfb12030046] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/30/2021] [Accepted: 08/04/2021] [Indexed: 12/22/2022] Open
Abstract
The occurrence of bone-related disorders and diseases has dramatically increased in recent years around the world. Demineralized bone matrix (DBM) has been widely used as a bone implant due to its osteoinduction and bioactivity. However, the use of DBM is limited because it is a particulate material, which makes it difficult to manipulate and implant with precision. In addition, these particles are susceptible to migration to other sites. To address this situation, DBM is commonly incorporated into a variety of carriers. An injectable scaffold has advantages over bone grafts or preformed scaffolds, such as the ability to flow and fill a bone defect. The aim of this research was to develop a DBM carrier with such viscoelastic properties in order to obtain an injectable bone substitute (IBS). The developed DBM carrier consisted of a PVA/glycerol network cross-linked with borax and reinforced with CaCO3 as a pH neutralizer, porosity generator, and source of Ca. The physicochemical properties were determined by an injectability test, FTIR, SEM, and TGA. Porosity, degradation, bioactivity, possible cytotoxic effect, and proliferation in osteoblasts were also determined. The results showed that the developed material has great potential to be used in bone tissue regeneration.
Collapse
Affiliation(s)
- Daniela Medrano-David
- Research Group GIBEC, Life Sciences Faculty, EIA University, Envigado 055420, Colombia; (A.M.L.); (M.E.L.)
| | - Aura María Lopera
- Research Group GIBEC, Life Sciences Faculty, EIA University, Envigado 055420, Colombia; (A.M.L.); (M.E.L.)
| | - Martha Elena Londoño
- Research Group GIBEC, Life Sciences Faculty, EIA University, Envigado 055420, Colombia; (A.M.L.); (M.E.L.)
| | - Pedronel Araque-Marín
- Research and Innovation Group in Chemical Formulations, Life Sciences Faculty, EIA University, Envigado 055420, Colombia;
- CECOLTEC, Medellín 050022, Colombia
| |
Collapse
|
5
|
Li D, Yang Z, Zhao X, Luo Y, Ou Y, Kang P, Tian M. A bone regeneration strategy via dual delivery of demineralized bone matrix powder and hypoxia-pretreated bone marrow stromal cells using an injectable self-healing hydrogel. J Mater Chem B 2021; 9:479-493. [PMID: 33289774 DOI: 10.1039/d0tb01924k] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Demineralized bone matrix (DBM) powder is a potential alternative bone grafting material due to its bone regeneration capacity when the supply of autogenous bone is insufficient. However, the use of DBM powder alone remains challenging in many aspects in the clinic, such as its unstable osteoinductivity due to inactivation of growth factors during the preparation process, lack of bone regeneration cells, and difficulty in handling. Herein, we report a strategy that adopts a dual delivery of DBM powder and hypoxia-pretreated bone marrow stromal cells (BMSCs) using an injectable self-healing hydrogel to enhance bone regeneration and repair a cranial bone defect in a rabbit model. The injectable self-healing hydrogel was prepared based on a double crosslinking architecture, which comprised a dynamically cross-linked Schiff-base network as a self-healing component and a borax ion cross-linked physical network that strengthened its mechanical properties. The handling of the DBM powder was improved by mixing with the hydrogel, and, more importantly, the expression of osteocalcin (OCN) and vascular endothelial growth factor (VEGF) of the encapsulated BMSCs in the hydrogel was significantly up-regulated after hypoxia-pretreatment. The in vivo study demonstrated that the use of the hydrogel alone cannot heal the cranial bone defect, while the hydrogel/BMSC composite could increase the bone formation but was inferior to the hydrogel/DBM composite. Finally, the hydrogel/DBM/BMSC composite exhibited the best bone defect repairing effects among all groups. Overall, our results demonstrate that this dual delivery approach is a promising strategy to enhance bone regeneration for bone defect repair.
Collapse
Affiliation(s)
- Donghai Li
- Department of Orthopaedics Surgery, West China Hospital, Sichuan University, No. 37 Wainan Guoxue Road, Chengdu 610041, P. R. China.
| | - Zhouyuan Yang
- Department of Orthopaedics Surgery, West China Hospital, Sichuan University, No. 37 Wainan Guoxue Road, Chengdu 610041, P. R. China.
| | - Xin Zhao
- Department of Orthopaedics Surgery, West China Hospital, Sichuan University, No. 37 Wainan Guoxue Road, Chengdu 610041, P. R. China.
| | - Yue Luo
- Department of Orthopaedics Surgery, West China Hospital, Sichuan University, No. 37 Wainan Guoxue Road, Chengdu 610041, P. R. China.
| | - Yi Ou
- Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China.
| | - Pengde Kang
- Department of Orthopaedics Surgery, West China Hospital, Sichuan University, No. 37 Wainan Guoxue Road, Chengdu 610041, P. R. China.
| | - Meng Tian
- Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China.
| |
Collapse
|
6
|
Bioactive Polymeric Materials for the Advancement of Regenerative Medicine. J Funct Biomater 2021; 12:jfb12010014. [PMID: 33672492 PMCID: PMC8006220 DOI: 10.3390/jfb12010014] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/13/2021] [Accepted: 02/17/2021] [Indexed: 12/13/2022] Open
Abstract
Biopolymers are widely accepted natural materials in regenerative medicine, and further development of their bioactivities and discoveries on their composition/function relationships could greatly advance the field. However, a concise insight on commonly investigated biopolymers, their current applications and outlook of their modifications for multibioactivity are scarce. This review bridges this gap for professionals and especially freshmen in the field who are also interested in modification methods not yet in commercial use. A series of polymeric materials in research and development uses are presented as well as challenges that limit their efficacy in tissue regeneration are discussed. Finally, their roles in the regeneration of select tissues including the skin, bone, cartilage, and tendon are highlighted along with modifiable biopolymer moieties for different bioactivities.
Collapse
|
7
|
Yang Z, Xiao L, Deng Z, Cai L, Xie Y. Evaluation of Demineralized Bone Matrix Particles Delivered by Alginate Hydrogel for a Bone Graft Substitute: An Animal Experimental Study. Med Sci Monit 2021; 27:e928617. [PMID: 33481770 PMCID: PMC7836326 DOI: 10.12659/msm.928617] [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] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Our objective was to explore a synthetic alginate hydrogel delivery system for the delivery of demineralized bone matrix (DBM) particles for bone graft substitutes. MATERIAL AND METHODS The physiochemical properties of surface morphology, porosity measurements, in vitro degradation, equilibrium swelling, and mechanical testing of combined DBM powder and alginate in amounts of 0 mg/1 mL, 25 mg/1 mL, 50 mg/1 mL, and 100 mg/1 mL were detected. In vitro cell culture and in vivo studies using Sprague-Dawley rats were performed to evaluate the biocompatibility and osteoinductivity of DBM-alginate (ADBM) composites. RESULTS DBM particles were uniformly scattered in all composites, and macro-scale pores were omnipresent. All composites showed a similar low degradation rate, with approximately 85% of weight remaining after 15 days. As the concentration of DBM particles in composites increased, degradation in collagenase and elastic modulus increased and the pore area and swelling ratio significantly decreased. No cytotoxicity of ADBM or alginate on mesenchymal stem cells (MSCs) was observed. Cell cultivation with ADBM showed greater osteogenic potential, evidenced by the upregulation of alkaline phosphatase and alizarin red staining activity and the mRNA expression level of marker genes RUNX2, OCN, OPN, and collagen I compared with the cells grown in alginate. Evaluation of ectopic bone formation revealed the osteoinductivity of the ADBM composites was significantly greater than that of DBM particles. Osteoinduction of the composites was demonstrated by a cranial defect model study. CONCLUSIONS The delivery of DBM particles using a synthetic alginate hydrogel carrier may be a promising approach in bone tissue engineering for bone defects.
Collapse
Affiliation(s)
- Zhiqiang Yang
- Department of Spine Surgery and Musculoskeletal Tumor, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (mainland)
| | - Lingfei Xiao
- Department of Spine Surgery and Musculoskeletal Tumor, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (mainland)
| | - Zhouming Deng
- Department of Spine Surgery and Musculoskeletal Tumor, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (mainland)
| | - Lin Cai
- Department of Spine Surgery and Musculoskeletal Tumor, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (mainland)
| | - Yuanlong Xie
- Department of Spine Surgery and Musculoskeletal Tumor, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (mainland)
| |
Collapse
|
8
|
Chen C, Rehnama M, Kim S, Lee CS, Zhang X, Aghaloo T, Fan J, Lee M. Enhanced Osteoinductivity of Demineralized Bone Matrix with Noggin Suppression in Polymer Matrix. Adv Biol (Weinh) 2021; 5:e202000135. [PMID: 33585837 PMCID: PMC7877805 DOI: 10.1002/adbi.202000135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Demineralized bone matrix (DBM), a potential alternative to autologous bone-graft, has been increasingly used for clinical bone repair; however, its application in larger defects isn't successful partly due to the rapid dispersion of DBM particles and relatively lower osteoinductivity. Here, a novel strategy is created to complement the osteoinductivity of DBM by incorporating DBM in biopolymer hydrogel combined with the abrogation of BMP antagonism. Combined treatment of DBM + noggin-suppression displays increased osteogenic potency of human bone marrow mesenchymal stem cells (hBMSCs) in vitro. Injectable chitosan (MeGC)-based hydrogel with heparinization (Hep-MeGC) is further developed to localize and stabilize DBM. Noggin-suppression reveals the significant increase in osteogenesis of hBMSCs in the photopolymerizable Hep-MeGC hydrogels with the encapsulation of DBM. Moreover, the combination of DBM + noggin-suppression in the injectable Hep-MeGC hydrogel displays a robust bone healing in mouse critical-sized calvarial defects in vivo. The mechanistic analysis demonstrates that noggin-suppression increased DBM osteoinductivity by stimulating endogenous BMP/Smad signals. These results have shown promise in DBM's ability as a prominent bone grafting material while being coupled with gene editing mechanism and a localizing three-dimensional scaffold. Together, this approach poses a significant increase in the efficiency of DBM-mediated craniofacial bone repair and dental osteointegration.
Collapse
Affiliation(s)
- Chen Chen
- Division of Advanced Prosthodontics, School of Dentistry, University of California, Los Angeles, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668, USA
| | - Matthew Rehnama
- Division of Advanced Prosthodontics, University of California, Los Angeles, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668, USA
| | - Soyon Kim
- Division of Advanced Prosthodontics, University of California, Los Angeles, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668, USA
| | - Chung-Sung Lee
- Division of Advanced Prosthodontics, University of California, Los Angeles, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668, USA
| | - Xiao Zhang
- Division of Advanced Prosthodontics, University of California, Los Angeles, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668, USA
| | - Tara Aghaloo
- Division of Diagnostic and Surgical Sciences, University of California at Los Angeles, 10833 Le Conte Avenue, Los Angeles, California 90095, United States
| | - Jiabing Fan
- Division of Advanced Prosthodontics, School of Dentistry, University of California, Los Angeles, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668, USA
| | - Min Lee
- Division of Advanced Prosthodontics, School of Dentistry, Department of Bioengineering, University of California, Los Angeles, UCLA School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA 90095-1668, USA
| |
Collapse
|
9
|
Dadgar N, Ghiaseddin A, Irani S, Tafti SHA, Soufi-Zomorrod M, Soleimani M. Bioartificial injectable cartilage implants from demineralized bone matrix/PVA and related studies in rabbit animal model. J Biomater Appl 2020; 35:1315-1326. [PMID: 33307942 DOI: 10.1177/0885328220976552] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Functional cartilage tissue engineering needs a substantial, easy to handle scaffold with proper mechanical strength to repair defected area in articular cartilage. In this study, we report the development and characterization of demineralized bone matrix (DBM) in with a poly vinyl alcohol (PVA) to have a proper homogenous injectable scaffold. Injectabiliy of the biodegradable scaffolds, degradation rate, swelling ratio compression and tensile mechanical properties, and viability and proliferation of bone marrow mesenchymal stem cells (BM-MSCs) followed by differentiation of them In-vitro and In-vivo seeded within the scaffold were studied. It demonstrated that the PVA 20% could increase significantly (p < 0.05) the biodegradability of DBM after 720 hours.DBM with 20% of PVA scaffold has significantly higher (p < 0.05) compression and tensile mechanical strength and viscosity. SEM images showed a multilayer of cells on DBM scaffold incorporated with PVA 20%.BM-MSCs on scaffolds, DBM+PVA 20% had a significant growth rate (p < 0.0001) compare to 2D and low concentration of PVA after 21 days of culture. Viability of cells was significantly higher (p < 0.05) on DBM+PVA scaffold compare to DBM. DBM+PVA 20% enhanced cell viability (P < 0.05) compare to DBM scaffold. The PVA presence enhanced chondrogenesis differentiation at the cellular and molecular levels, as evidenced by increased COL II (P < 0.05) and SOX2 upregulation of Chondrogensis-specific genes (p < 0.001). Hyline-like cartilage covered the defect which was confirmed by microscopy and histology assessments. Having considered percentages of PVA with a constant amount of DBM, injectability, compressive mechanical properties, homogeneity of the scaffold, and providing sufficient surface area (12.25 cm2/ml) for cell attachment; 0.35 g/ml of DBM in 20% PVA (w/v) has applicable properties within the ranges of studies which can be proposed for the injectable engineered articular cartilage.
Collapse
Affiliation(s)
- Neda Dadgar
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Ali Ghiaseddin
- Biomedical Engineering Division, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran
| | - Shiva Irani
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | | | - Masoud Soleimani
- Department of Chemistry, Michigan State University, East Lansing, MI, USA
| |
Collapse
|
10
|
Xu J, Duan Z, Qi X, Ou Y, Guo X, Zi L, Wei Y, Liu H, Ma L, Li H, You C, Tian M. Injectable Gelatin Hydrogel Suppresses Inflammation and Enhances Functional Recovery in a Mouse Model of Intracerebral Hemorrhage. Front Bioeng Biotechnol 2020; 8:785. [PMID: 32760708 PMCID: PMC7371925 DOI: 10.3389/fbioe.2020.00785] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 06/22/2020] [Indexed: 02/05/2023] Open
Abstract
Intracerebral hemorrhage (ICH) is a devastating subtype of stroke with high morbidity and mortality. However, there is no effective therapy method to improve its clinical outcomes to date. Here we report an injectable gelatin hydrogel that is capable of suppressing inflammation and enhancing functional recovery in a mouse model of ICH. Thiolated gelatin was synthesized by EDC chemistry and then the hydrogel was formed through Michael addition reaction between the thiolated gelatin and polyethylene glycol diacrylate. The hydrogel was characterized by scanning electron microscopy, porosity, rheology, and cytotoxicity before evaluating in a mouse model of ICH. The in vivo study showed that the hydrogel injection into the ICH lesion reduced the neuron loss, attenuated the neurological deficit post-operation, and decreased the activation of the microglia/macrophages and astrocytes. More importantly, the pro-inflammatory M1 microglia/macrophages polarization was suppressed while the anti-inflammatory M2 phenotype was promoted after the hydrogel injection. Besides, the hydrogel injection reduced the release of inflammatory cytokines (IL-1β and TNF-α). Moreover, integrin β1 was confirmed up-regulated around the lesion that is positively correlated with the M2 microglia/macrophages. The related mechanism was proposed and discussed. Taken together, the injectable gelatin hydrogel suppressed the inflammation which might contribute to enhance the functional recovery of the ICH mouse, making it a promising application in the clinic.
Collapse
Affiliation(s)
- Jiake Xu
- Neurosurgery Research Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
| | - Zhongxin Duan
- Neurosurgery Research Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
| | - Xin Qi
- Neurosurgery Research Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Yi Ou
- Neurosurgery Research Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Xi Guo
- Neurosurgery Research Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
| | - Liu Zi
- Neurosurgery Research Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
- Department of Integrated Traditional and Western Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yang Wei
- Neurosurgery Research Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Hao Liu
- Neurosurgery Research Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
| | - Lu Ma
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
| | - Hao Li
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
| | - Chao You
- Neurosurgery Research Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
- West China Brain Research Centre, West China Hospital, Sichuan University, Chengdu, China
| | - Meng Tian
- Neurosurgery Research Laboratory, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
- West China Brain Research Centre, West China Hospital, Sichuan University, Chengdu, China
| |
Collapse
|
11
|
Chitosan hydrogels for sustained drug delivery. J Control Release 2020; 326:150-163. [PMID: 32562854 DOI: 10.1016/j.jconrel.2020.06.012] [Citation(s) in RCA: 196] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 06/11/2020] [Accepted: 06/13/2020] [Indexed: 12/22/2022]
Abstract
Sustainable and controlled delivery of drugs is at the centre of a huge amount of undertaken researches. The ability of hydrogels, high water content materials, to achieve a local and delayed-delivery has already been demonstrated for a wide variety of therapeutic agents and various polymer natures. In particular, chitosan, a natural polymer, stands out as a first choice material for hydrogels elaboration in biomedical, cosmetic, and health related applications, owing to its interesting properties (as biocompatibility, biodegradability, antimicrobial capacity, and mucoadhesivity). Moreover, chitosan also allows drugs to go easier through biological barriers. The main objective of this review is to report the various uses of chitosan hydrogels as drug delivery devices to control and/or delay the release of drugs loaded into their three dimensional matrix. A wide spectrum of corresponding biomedical applications of these systems can be encountered in the literature, whatever the physicochemical nature of drugs (hydrophilic, hydrophobic, macromolecular), as detailed in this review.
Collapse
|
12
|
Kim S, Fan J, Lee CS, Chen C, Bubukina K, Lee M. Heparinized chitosan stabilizes the bioactivity of BMP-2 and potentiates the osteogenic efficacy of demineralized bone matrix. J Biol Eng 2020; 14:6. [PMID: 32165922 PMCID: PMC7059291 DOI: 10.1186/s13036-020-0231-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 02/25/2020] [Indexed: 12/23/2022] Open
Abstract
Background Demineralized bone matrix (DBM), an allograft bone processed to better expose osteoinductive factors such as bone morphogenetic proteins (BMPs), is increasingly used for clinical bone repair. However, more extensive use of DBM is limited by its unpredictable osteoinductivity and low bone formation capacity. Commercial DBM products often employ polymeric carriers to enhance handling properties but such carriers generally do not possess bioactive functions. Heparin is a highly sulfated polysaccharide and is shown to form a stable complex with growth factors to enhance their bioactivities. In this study, a new heparinized synthetic carrier for DBM is developed based on photocrosslinking of methacrylated glycol chitosan and heparin conjugation. Results Heparinized chitosan exerts protective effects on BMP bioactivity against physiological stressors related to bone fracture healing. It also enhances the potency of BMPs by inhibiting the activity of BMP antagonist, noggin. Moreover, heparinized chitosan is effective to deliver bone marrow stromal cells and DBM for enhanced osteogenesis by sequestering and localizing the cell-produced or DBM-released BMPs. Conclusions This research suggests an essential approach of developing a new hydrogel carrier to stabilize the bioactivity of BMPs and improve the clinical efficacy of current bone graft therapeutics for accelerated bone repair.
Collapse
Affiliation(s)
- Soyon Kim
- 1Division of Advanced Prosthodontics, University of California, Los Angeles, USA
| | - Jiabing Fan
- 1Division of Advanced Prosthodontics, University of California, Los Angeles, USA
| | - Chung-Sung Lee
- 1Division of Advanced Prosthodontics, University of California, Los Angeles, USA
| | - Chen Chen
- 1Division of Advanced Prosthodontics, University of California, Los Angeles, USA
| | - Ksenia Bubukina
- 1Division of Advanced Prosthodontics, University of California, Los Angeles, USA
| | - Min Lee
- 1Division of Advanced Prosthodontics, University of California, Los Angeles, USA.,2Department of Bioengineering, University of California, Los Angeles, USA
| |
Collapse
|
13
|
Natural Sources and Applications of Demineralized Bone Matrix in the Field of Bone and Cartilage Tissue Engineering. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1249:3-14. [DOI: 10.1007/978-981-15-3258-0_1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
14
|
Singh A, Thakur S, Sharma T, Kaur M, Sahajpal NS, Aurora R, Jain SK. Harmonious Biomaterials for Development of In situ Approaches for Locoregional Delivery of Anti-cancer Drugs: Current Trends. Curr Med Chem 2019; 27:3463-3498. [PMID: 31223077 DOI: 10.2174/1573406415666190621095726] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 04/17/2019] [Accepted: 04/23/2019] [Indexed: 11/22/2022]
Abstract
Locoregional drug delivery is a novel approach for the effective delivery of anti-cancer agents as it exposes the tumors to high concentration of drugs. In situ gelling systems have fetched paramount attention in the field of localized cancer chemotherapy due to their targeted delivery, ease of preparation, prolonged or sustained drug release and improved patient compliance. Numerous polymers have been investigated for their properties like swelling along with biodegradation, drug release and physicochemical properties for successful targeting of the drugs at the site of implantation. The polymers such as chitosan, Hyaluronic Acid (HA), poloxamer, Poly Glycolic Lactic Acid (PGLA) and Poly Lactic Acid (PLA) tend to form in situ hydrogels and have been exploited to develop localized delivery vehicles. These formulations are administered in the solution form and on exposure to physiological environment such as temperature, pH or ionic composition they undergo phase conversion into a hydrogel drug depot. The use of in situ gelling approach has provided prospects to increase overall survival and life quality of cancer patient by enhancing the bioavailability of drug to the site of tumor by minimizing the exposure to normal cells and alleviating systemic side effects. Because of its favorable safety profile and clinical benefits, United States Food and Drug Administration (U.S. FDA) has approved polymer based in situ systems for prolonged locoregional activity. This article discusses the rationale for developing in situ systems for targeted delivery of anti-cancer agents with special emphasis on types of polymers used to formulate the in situ system. In situ formulations for locoregional anti-cancer drug delivery that are marketed and are under clinical trials have also been discussed in detail in this article.
Collapse
Affiliation(s)
- Amrinder Singh
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Shubham Thakur
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Tushit Sharma
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Manjot Kaur
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Nikhil Shri Sahajpal
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Rohan Aurora
- The International School Bangalore, Karnataka, India
| | - Subheet Kumar Jain
- Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| |
Collapse
|
15
|
Synthesis, Nanomechanical Characterization and Biocompatibility of a Chitosan-Graft-Poly(ε-caprolactone) Copolymer for Soft Tissue Regeneration. MATERIALS 2019; 12:ma12010150. [PMID: 30621234 PMCID: PMC6337280 DOI: 10.3390/ma12010150] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 12/21/2018] [Accepted: 12/27/2018] [Indexed: 11/17/2022]
Abstract
Tissue regeneration necessitates the development of appropriate scaffolds that facilitate cell growth and tissue development by providing a suitable substrate for cell attachment, proliferation, and differentiation. The optimized scaffolds should be biocompatible, biodegradable, and exhibit proper mechanical behavior. In the present study, the nanomechanical behavior of a chitosan-graft-poly(ε-caprolactone) copolymer, in hydrated and dry state, was investigated and compared to those of the individual homopolymers, chitosan (CS) and poly(ε-caprolactone) (PCL). Hardness and elastic modulus values were calculated, and the time-dependent behavior of the samples was studied. Submersion of PCL and the graft copolymer in α-MEM suggested the deterioration of the measured mechanical properties as a result of the samples’ degradation. However, even after three days of degradation, the graft copolymer presented sufficient mechanical strength and elastic properties, which resemble those reported for soft tissues. The in vitro biological evaluation of the material clearly demonstrated that the CS-g-PCL copolymer supports the growth of Wharton’s jelly mesenchymal stem cells and tissue formation with a simultaneous material degradation. Both the mechanical and biological data render the CS-g-PCL copolymer appropriate as a scaffold in a cell-laden construct for soft tissue engineering.
Collapse
|
16
|
Altomare L, Bonetti L, Campiglio CE, De Nardo L, Draghi L, Tana F, Farè S. Biopolymer-based strategies in the design of smart medical devices and artificial organs. Int J Artif Organs 2018; 41:337-359. [PMID: 29614899 PMCID: PMC6159845 DOI: 10.1177/0391398818765323] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 02/26/2018] [Indexed: 12/31/2022]
Abstract
Advances in regenerative medicine and in modern biomedical therapies are fast evolving and set goals causing an upheaval in the field of materials science. This review discusses recent developments involving the use of biopolymers as smart materials, in terms of material properties and stimulus-responsive behavior, in the presence of environmental physico-chemical changes. An overview on the transformations that can be triggered in natural-based polymeric systems (sol-gel transition, polymer relaxation, cross-linking, and swelling) is presented, with specific focus on the benefits these materials can provide in biomedical applications.
Collapse
Affiliation(s)
- Lina Altomare
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milano, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze, Italy
| | - Lorenzo Bonetti
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milano, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze, Italy
| | - Chiara E Campiglio
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milano, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze, Italy
| | - Luigi De Nardo
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milano, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze, Italy
| | - Lorenza Draghi
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milano, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze, Italy
| | - Francesca Tana
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milano, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze, Italy
| | - Silvia Farè
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta,” Politecnico di Milano, Milano, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze, Italy
| |
Collapse
|
17
|
Lu H, Meng H, Lu S, Qin L, Zhao B, Wang A, Peng J, Xu W, Guo Q, Zhang J. Freeze-dried and irradiated allograft bone combined with fresh autologous coagula promotes angiogenesis in an ectopic bone allograft implantation model. Connect Tissue Res 2018; 59:233-244. [PMID: 28718671 DOI: 10.1080/03008207.2017.1353977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Freeze-dried and irradiated allograft bone (FIAB) is more easily impacted than fresh-frozen allograft bone (FAB), but has weaker incorporation efficiency. We combined FIAB with fresh autologous coagula to enhance donor-host incorporation after impaction during hip revision. METHODS Thirty adult male Sprague-Dawley (SD) rats were sacrificed for bone allograft harvesting, and nine male rats were subjected to ectopic bone allograft implantation. For each rat, the container on the left (study) side was filled with freeze-dried allograft bone powder and fresh autologous blood coagula, whereas the right (control) side was filled with freeze-dried allograft bone powder and physiological saline. The extent of angiogenesis (VEGFα) was investigated at postoperative weeks 1, 4, and 8. The deformability of the material was evaluated by performing a confined-impaction mechanical test. RESULTS At postoperative weeks 4 and 8, angiogenesis within FIAB on the left side was more pronounced than that on the right side. At postoperative week 1, the left side showed significantly higher VEGFα expression than that on the right side. The delta ratios of compression of the allografts were found to be influenced by bone height and impaction frequency, but not by stiffness or elastic modulus (EM). CONCLUSION Supplementation with fresh autologous coagula promoted angiogenesis within the FIABs. Moreover, FIABs were equivalent to FABs in terms of deformability.
Collapse
Affiliation(s)
- Haibo Lu
- a Orthopaedic Department , First Affiliated Hospital of General Hospital of the Chinese PLA , Beijing , China
| | - Haoye Meng
- b Institute of Orthopaedics of the Chinese PLA , General Hospital of the Chinese PLA , Beijing , China
| | - Shibi Lu
- b Institute of Orthopaedics of the Chinese PLA , General Hospital of the Chinese PLA , Beijing , China
| | - Ling Qin
- c Musculoskeletal Research Laboratory, Department of Orthopaedics and Traumatology , The Chinese University of Hong Kong , Hong Kong SAR , China
| | - Bin Zhao
- b Institute of Orthopaedics of the Chinese PLA , General Hospital of the Chinese PLA , Beijing , China
| | - Aiyuan Wang
- b Institute of Orthopaedics of the Chinese PLA , General Hospital of the Chinese PLA , Beijing , China
| | - Jiang Peng
- b Institute of Orthopaedics of the Chinese PLA , General Hospital of the Chinese PLA , Beijing , China
| | - Wenjing Xu
- b Institute of Orthopaedics of the Chinese PLA , General Hospital of the Chinese PLA , Beijing , China
| | - Quanyi Guo
- b Institute of Orthopaedics of the Chinese PLA , General Hospital of the Chinese PLA , Beijing , China
| | - Jian Zhang
- a Orthopaedic Department , First Affiliated Hospital of General Hospital of the Chinese PLA , Beijing , China
| |
Collapse
|
18
|
Silk Fibroin-Based Scaffold for Bone Tissue Engineering. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1077:371-387. [PMID: 30357699 DOI: 10.1007/978-981-13-0947-2_20] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Regeneration of diseased or damaged skeletal tissues is one of the challenge that needs to be solved. Although there have been many bone tissue engineering developed, scaffold-based tissue engineering complement the conventional treatment for large bone by completing biological and functional environment. Among many materials, silk fibroin (SF) is one of the favorable material for applications in bone tissue engineering scaffolding. SF is a fibrous protein mainly extracted from Bombyx mori. and spiders. SF has been used as a biomaterial for bone graft by its unique mechanical properties, controllable biodegradation rate and high biocompatibility. Moreover, SF can be processed using conventional and advanced biofabrication methods to form various scaffold types such as sponges, mats, hydrogels and films. This review discusses about recent application and advancement of SF as a biomaterial.
Collapse
|
19
|
Nafee N, Zewail M, Boraie N. Alendronate-loaded, biodegradable smart hydrogel: a promising injectable depot formulation for osteoporosis. J Drug Target 2017; 26:563-575. [DOI: 10.1080/1061186x.2017.1390670] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Noha Nafee
- Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Mariam Zewail
- Department of Pharmaceutics, Faculty of Pharmacy, Damanhour University, Damanhour, Egypt
| | - Nabila Boraie
- Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| |
Collapse
|
20
|
Aly LAA, Hammouda NI. Evaluation of implant stability simultaneously placed with sinus lift augmented with putty versus powder form of demineralized bone matrix in atrophied posterior maxilla. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.fdj.2016.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
21
|
Ma L, Tian M. [Feasibility of an injectable and in situ gelling gelatin hydrogel for demineralized bone matrix powder delivery]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2017; 31:300-305. [PMID: 29806258 DOI: 10.7507/1002-1892.201611113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Objective To introduce an injectable and in situ gelling gelatin hydrogel, and to explore the possibility as a carrier for demineralized bone matrix (DBM) powder delivery. Methods First, thiolated gelatin was prepared and the thiol content was determined by Ellman method, and then the injectable and in situ gelling gelatin hydrogel (Gel) was formed by crosslinking of the thiolated gelatin and poly (ethylene oxide) diacrylate and the gelation time was determined by inverted method. Finally, the DBM-Gel composite was prepared by mixing Gel and DBM powder. The cytotoxicity was tested by live/dead staining and Alamar blue assay of the encapsulated cells in the DBM-Gel. For in vitro cell induction, C2C12 cells were firstly incubated onto the surface of the DBM and then the composite was prepared. The experiment included two groups: DBM-Gel and DBM. The alkaline phosphatase (ALP) activity was determined at 1, 3, 5, and 7 days after culture. In vivo osteoinductivity was evaluated using ectopic bone formation model of nude rats. Histological observation and the ALP activity was measured in DBM-Gel and DBM groups at 4 weeks after implantation. Results The thiol content in the thiolated gelatin was (0.51±0.03) mmol/g determined by Ellman method. The gelation time of the hydrogel was (6±1) minutes. DBM powder can be mixed with the hydrogel and injected into the implantation site within the gelation time. The cells in the DBM-Gel exhibited spreading morphology and connected each other in part with increasing culture time. The viability of the cells was 95.4%±1.9%, 97.3%±1.3%, and 96.1%±1.6% at 1, 3, and 7 days after culture, respectively. The relative proliferation was 1.0±0.0, 1.1±0.1, 1.5±0.1, and 1.6±0.1 at 1, 3, 5, and 7 days after culture respectively. In vitro induction showed that the ALP activity of the DBM-Gel group was similar to that of the DBM group, showing no significant difference ( P>0.05). With increasing culture time, the ALP activities in both groups increased gradually and the activity at 5 and 7 days was significantly higher than that at 1 and 3 days ( P<0.05), while there was no significant difference between at 1 and 3 days, and between 5 and 7 days ( P>0.05). At 4 weeks after implantation in vivo, new bone and cartilage were observed, but no bone marrow formation in DBM-Gel group; in DBM group, new bone, new cartilage, and bone marrow formation were observed. The histological osteoinduction scores of DBM-Gel and DBM groups were 4.0 and 4.5, respectively. The ALP activities of DBM-Gel and DBM groups were respectively (119.4±22.7) and (146.7±13.0) μmol/mg protein/min, showing no significant difference ( t=-2.085, P=0.082). Conclusion The injectable and in situ gelling gelatin hydrogel for delivery of DBM is feasible.
Collapse
Affiliation(s)
- Lu Ma
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Meng Tian
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China;Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu Sichuan, 610041,
| |
Collapse
|
22
|
Morris AH, Stamer DK, Kyriakides TR. The host response to naturally-derived extracellular matrix biomaterials. Semin Immunol 2017; 29:72-91. [PMID: 28274693 DOI: 10.1016/j.smim.2017.01.002] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 01/20/2017] [Accepted: 01/31/2017] [Indexed: 12/13/2022]
Abstract
Biomaterials based on natural materials including decellularized tissues and tissue-derived hydrogels are becoming more widely used for clinical applications. Because of their native composition and structure, these biomaterials induce a distinct form of the foreign body response that differs from that of non-native biomaterials. Differences include direct interactions with cells via preserved moieties as well as the ability to undergo remodeling. Moreover, these biomaterials could elicit adaptive immune responses due to the presence of modified native molecules. Therefore, these biomaterials present unique challenges in terms of understanding the progression of the foreign body response. This review covers this response to natural materials including natural polymers, decellularized tissues, cell-derived matrix, tissue derived hydrogels, and biohybrid materials. With the expansion of the fields of regenerative medicine and tissue engineering, the current repertoire of biomaterials has also expanded and requires continuous investigation of the responses they elicit.
Collapse
Affiliation(s)
- Aaron H Morris
- Department of Biomedical Engineering, Yale University, New Haven, CT, United States; Vascular Biology and Therapeutics Program, Yale University, New Haven, CT, United States
| | - D K Stamer
- Department of Biomedical Engineering, Yale University, New Haven, CT, United States
| | - T R Kyriakides
- Department of Biomedical Engineering, Yale University, New Haven, CT, United States; Department of Pathology, Yale University, New Haven, CT, United States; Vascular Biology and Therapeutics Program, Yale University, New Haven, CT, United States.
| |
Collapse
|
23
|
Zhao Y, Han L, Yan J, Li Z, Wang F, Xia Y, Hou S, Zhong H, Zhang F, Gu N. Irradiation Sterilized Gelatin-Water-Glycerol Ternary Gel as an Injectable Carrier for Bone Tissue Engineering. Adv Healthc Mater 2017; 6. [PMID: 27863162 DOI: 10.1002/adhm.201600749] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 09/29/2016] [Indexed: 12/18/2022]
Abstract
Injectable gelatin gels offer an attractive option for filling bone defects. The challenge is to fabricate gelatin gels with optimal gelation properties, which can be irradiation sterilized. Here, a gelatin-water-glycerol (GWG) gel is reported for use as a broad-spectrum injectable carrier. This ternary gel is high in glycerol and low in water, and remains stable after gamma irradiation at doses (25 kGy). As an injectable gel, it remains a viscous solution at gelatin concentrations ≤2.0%, at room temperature. Its storage modulus increases dramatically and eventually exceeds the loss modulus around 46-50 °C, indicating a transition from a liquid-like state to an elastic gel-like state. This ternary gel ranges significantly in terms of storage modulus (12-1700 Pa) while demonstrating a narrow pH range (5.58-5.66), depending on the gelatin concentration. Therefore, it can be loaded with a variety of materials. It is highly cytocompatible compared with saline in vivo and culture media in vitro. When loaded with demineralized bone matrix, the composites show favorable injectability, and excellent osteogenesis performance, after irradiation. These features can be attributed to high hydrophilicity and fast degradability. These findings justify that this ternary gel is promising as an irradiation-sterilized and universal injectable delivery system.
Collapse
Affiliation(s)
- Yantao Zhao
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Liwei Han
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Jun Yan
- School of Stomatology; Fourth Military Medical University; Xi'an 710032 P. R. China
| | - Zhonghai Li
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Fuli Wang
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Yang Xia
- Jiangsu Key Laboratory of Oral Diseases; Nanjing Medical University; Nanjing 210029 P. R. China
- Suzhou Institute & Collaborative Innovation Center of Suzhou Nano Science and Technology; Southeast University; Suzhou 215000 P. R. China
| | - Shuxun Hou
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Hongbin Zhong
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Feimin Zhang
- Jiangsu Key Laboratory of Oral Diseases; Nanjing Medical University; Nanjing 210029 P. R. China
- Suzhou Institute & Collaborative Innovation Center of Suzhou Nano Science and Technology; Southeast University; Suzhou 215000 P. R. China
| | - Ning Gu
- Suzhou Institute & Collaborative Innovation Center of Suzhou Nano Science and Technology; Southeast University; Suzhou 215000 P. R. China
- State Key Laboratory of Bioelectronics; Jiangsu Key Laboratory of Biomaterials and Devices; School of Biological Science and Medical Engineering; Southeast University; Nanjing 210009 P. R. China
| |
Collapse
|
24
|
In situ forming hydrogels based on chitosan for drug delivery and tissue regeneration. Asian J Pharm Sci 2016. [DOI: 10.1016/j.ajps.2016.07.001] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
|
25
|
Petta D, Fussell G, Hughes L, Buechter DD, Sprecher CM, Alini M, Eglin D, D'Este M. Calcium phosphate/thermoresponsive hyaluronan hydrogel composite delivering hydrophilic and hydrophobic drugs. J Orthop Translat 2016; 5:57-68. [PMID: 30035075 PMCID: PMC5987042 DOI: 10.1016/j.jot.2015.11.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 11/11/2015] [Accepted: 11/17/2015] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND/OBJECTIVE Advanced synthetic biomaterials that are able to reduce or replace the need for autologous bone transplantation are still a major clinical need in orthopaedics, dentistry, and trauma. Key requirements for improved bone substitutes are optimal handling properties, ability to fill defects of irregular shape, and capacity for delivering osteoinductive stimuli. MATERIALS AND METHODS In this study, we targeted these requirements by preparing a new composite of β-tricalcium phosphate (TCP) and a thermoresponsive hyaluronan (HA) hydrogel. Dissolution properties of the composite as a function of the particle size and polymeric phase molecular weight and concentration were analysed to identify the best compositions. RESULTS Owing to its amphiphilic character, the composite was able to provide controlled release of both recombinant human bone morphogenetic protein-2 and dexamethasone, selected as models for a biologic and a small hydrophobic molecule, respectively. CONCLUSION The TCP-thermoresponsive HA hydrogel composite developed in this work can be used for preparing synthetic bone substitutes in the form of injectable or mouldable pastes and can be supplemented with small hydrophobic molecules or biologics for improved osteoinductivity.
Collapse
Affiliation(s)
- Dalila Petta
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Garland Fussell
- DePuy Synthes Biomaterials, 1230 Wilson Drive, West Chester, PA 19380, USA
| | - Lisa Hughes
- DePuy Synthes Biomaterials, 1230 Wilson Drive, West Chester, PA 19380, USA
| | | | | | - Mauro Alini
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - David Eglin
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Matteo D'Este
- AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| |
Collapse
|
26
|
Incorporation of nanostructured hydroxyapatite and poly(N-isopropylacrylamide) in demineralized bone matrix enhances osteoblast and human mesenchymal stem cell activity. Biointerphases 2015; 10:041001. [PMID: 26443012 DOI: 10.1116/1.4931882] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Demineralized bone matrix (DBM) is currently used in many clinical applications for bone augmentation and repair. DBM is normally characterized by the presence of bone morphogenetic proteins. In this study, the authors have optimized methods to obtain DBM under good manufacturing practice, resulting in enhanced bioactivity. The processed DBM can be used alone, together with nanostructured hydroxyapatite (nanoHA), or dispersed in a physiological carrier or hydrogel. In this study, osteoblasts (MG-63) and human bone marrow derived mesenchymal stem cells (hMSCs) were cultured on DBM pastes made in phosphate buffered saline solution or poly(N-isopropylacrylamide) (PNIPAAM) hydrogels with or without nanoHA. The authors observed that the presence of PNIPAAM reduced osteoblast adhesion, while the addition of nanoHA increased osteoblast adhesion, proliferation, interleukin-6 (IL-6) production, and reduced lactate dehydrogenase (LDH) production. Increasing concentrations of PNIPAAM in combination with nanoHA further increased osteoblast proliferation, and decreased IL-6 and LDH production. Incorporation of PNIPAAM in DBM enhanced hMSCs proliferation and collagen type-I production. Furthermore, a combination of PNIPAAM and nanoHA further increased alkaline phosphatase and osteocalcin production in hMSCs, independently from the concentration of PNIPAAM. This study shows that combinations of DBM with nanoHA and PNIPAAM seem to offer a promising route to enhance cell activity and induce osteogenic differentiation.
Collapse
|
27
|
Thermoresponsive hydrogels in biomedical applications. Eur J Pharm Biopharm 2015; 97:338-49. [DOI: 10.1016/j.ejpb.2015.05.017] [Citation(s) in RCA: 321] [Impact Index Per Article: 35.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 05/07/2015] [Accepted: 05/21/2015] [Indexed: 11/21/2022]
|
28
|
Al Kayal T, Panetta D, Canciani B, Losi P, Tripodi M, Burchielli S, Ottoni P, Salvadori PA, Soldani G. Evaluation of the effect of a gamma irradiated DBM-pluronic F127 composite on bone regeneration in Wistar rat. PLoS One 2015; 10:e0125110. [PMID: 25897753 PMCID: PMC4405568 DOI: 10.1371/journal.pone.0125110] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 03/20/2015] [Indexed: 11/25/2022] Open
Abstract
Demineralized bone matrix (DBM) is widely used for bone regeneration. Since DBM is prepared in powder form its handling properties are not optimal and limit the clinical use of this material. Various synthetic and biological carriers have been used to enhance the DBM handling. In this study we evaluated the effect of gamma irradiation on the physical-chemical properties of Pluronic and on bone morphogenetic proteins (BMPs) amount in DBM samples. In vivo studies were carried out to investigate the effect on bone regeneration of a gamma irradiated DBM-Pluronic F127 (DBM-PF127) composite implanted in the femur of rats. Gamma irradiation effects (25 kGy) on physical-chemical properties of Pluronic F127 were investigated by rheological and infrared analysis. The BMP-2/BMP-7 amount after DBM irradiation was evaluated by ELISA. Bone regeneration capacity of DBM-PF127 containing 40% (w/w) of DBM was investigated in transcortical holes created in the femoral diaphysis of Wistar rat. Bone porosity, repaired bone volume and tissue organization were evaluated at 15, 30 and 90 days by Micro-CT and histological analysis. The results showed that gamma irradiation did not induce significant modification on physical-chemical properties of Pluronic, while a decrease in BMP-2/BMP-7 amount was evidenced in sterilized DBM. Micro-CT and histological evaluation at day 15 post-implantation revealed an interconnected trabeculae network in medullar cavity and cellular infiltration and vascularization of DBM-PF127 residue. In contrast a large rate of not connected trabeculae was observed in Pluronic filled and unfilled defects. At 30 and 90 days the DBM-PF127 samples shown comparable results in term of density and thickness of the new formed tissue respect to unfilled defect. In conclusion a gamma irradiated DBM-PF127 composite, although it may have undergone a significant decrease in the concentration of BMPs, was able to maintains bone regeneration capability.
Collapse
Affiliation(s)
- Tamer Al Kayal
- Institute of Clinical Physiology- CNR, Pisa, Italy
- * E-mail:
| | | | - Barbara Canciani
- University & IRCCS AOU San Martino—IST, National Institute for Cancer Research, DIMES, Genova, Italy
| | - Paola Losi
- Institute of Clinical Physiology- CNR, Pisa, Italy
| | | | | | | | | | | |
Collapse
|
29
|
Wen C, Yan H, Fu S, Qian Y, Wang D, Wang C. Allogeneic adipose-derived stem cells regenerate bone in a critical-sized ulna segmental defect. Exp Biol Med (Maywood) 2015; 241:1401-9. [PMID: 25819682 DOI: 10.1177/1535370215576298] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Accepted: 01/28/2015] [Indexed: 12/17/2022] Open
Abstract
Adipose-derived stem cells (ASCs) with multilineage potential can be induced into osteoblasts, adipocytes and chondrocytes. ASCs as seed cell are widely used in the field of tissue engineering, but most studies either use autologous cells as the source or an immunodeficient animal as the host. In our present study, we explored the feasibility of applying allogeneic ASCs and demineralized bone matrix (DBM) scaffolds for repairing tubular bone defects without using immunosuppressive therapy. Allogeneic ASCs were expanded and seeded on DBM scaffolds and induced to differentiate along the osteogenic lineage. Eight Sprague-Dawley (SD) rats were used in this study and bilateral critical-sized defects (8 mm) of the ulna were created and divided into two groups: with ASC-DBM constructs or DBM alone. The systemic immune response and the extent of bone healing were evaluated post-operatively. Twenty-four weeks after implantation, digital radiography (DR) testing showed that new bones had formed in the experimental group. By contrast, no bone tissue formation was observed in the control group. This study demonstrated that allogeneic ASCs could promote bone regeneration and repair tubular bone defects combined with DBM by histologically typical bone without systemic immune response.
Collapse
Affiliation(s)
- Congji Wen
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, People's Republic of China Department of Plastic Surgery, Yancheng First Peoples' Hospital, 16 Yue He Road, People's Republic of China. 224000
| | - Hai Yan
- Department of Orthepedics, Nantong Rich Hospital, No. 2000 Lake Avenue, Nantong, 226010, People's Republic of China
| | - Shibo Fu
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, People's Republic of China
| | - Yunliang Qian
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, People's Republic of China
| | - Danru Wang
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, People's Republic of China
| | - Chen Wang
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, People's Republic of China
| |
Collapse
|
30
|
Ding X, Wei X, Huang Y, Guan C, Zou T, Wang S, Liu H, Fan Y. Delivery of demineralized bone matrix powder using a salt-leached silk fibroin carrier for bone regeneration. J Mater Chem B 2015; 3:3177-3188. [PMID: 32262311 DOI: 10.1039/c5tb00046g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Demineralized bone matrix (DBM) has been widely used for bone regeneration due to its osteoinductivity and osteoconductivity. However, the use of DBM powder is limited due to the difficulties in handling, the tendency to migrate from graft sites and the lack of stability after surgery. In this study, a mechanically stable, salt-leached porous silk fibroin carrier was used to improve the handling properties of DBM powder and to support the attachment, proliferation and osteogenic differentiation of rat bone marrow derived mesenchymal stem cells (rBMSCs). The DBM-silk fibroin (DBM/SF) scaffolds were fabricated with different contents of DBM powder (0%, 10%, 20%, 40% and 80% DBM/SF scaffolds). It was found that the DBM/SF scaffolds could form a stable composite preventing the migration of DBM powder. Moreover, the microarchitecture and mechanical properties of the scaffolds were influenced by the DBM powder. rBMSCs were seeded on the DBM/SF scaffolds and cultured for 14 days. Cell proliferation assays and cell morphology observations indicated that 20% DBM/SF scaffolds exhibited good cell attachment and proliferation. In addition, compared with the other groups, the cellular function was more actively exhibited on 20% DBM/SF scaffolds, as evident by the real-time reverse transcriptase-polymerase chain reaction (RT-PCR) analysis for osteoblast-related gene markers (e.g. COL1A1, ALP and cbfa1), the immunocytochemical evaluations of osteoblast-related extracellular matrix components (e.g. COL1A1, OCN and ONN) and the ALP activities. All the data suggested that DBM powder could be delivered using a silk fibroin carrier with improved handling characteristics and that 20% DBM/SF scaffolds had great potential as osteogenesis promoting scaffolds for successful applications in bone regeneration.
Collapse
Affiliation(s)
- Xili Ding
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, International Research Center for Implantable and Interventional Medical Devices, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, People's Republic of China.
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Kinard LA, Dahlin RL, Lam J, Lu S, Lee EJ, Kasper FK, Mikos AG. Synthetic biodegradable hydrogel delivery of demineralized bone matrix for bone augmentation in a rat model. Acta Biomater 2014; 10:4574-4582. [PMID: 25046637 DOI: 10.1016/j.actbio.2014.07.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 06/16/2014] [Accepted: 07/03/2014] [Indexed: 10/25/2022]
Abstract
There exists a strong clinical need for a more capable and robust method to achieve bone augmentation, and a system with fine-tuned delivery of demineralized bone matrix (DBM) has the potential to meet that need. As such, the objective of the present study was to investigate a synthetic biodegradable hydrogel for the delivery of DBM for bone augmentation in a rat model. Oligo(poly(ethylene glycol) fumarate) (OPF) constructs were designed and fabricated by varying the content of rat-derived DBM particles (either 1:3, 1:1 or 3:1 DBM:OPF weight ratio on a dry basis) and using two DBM particle size ranges (50-150 or 150-250 μm). The physical properties of the constructs and the bioactivity of the DBM were evaluated. Selected formulations (1:1 and 3:1 with 50-150 μm DBM) were evaluated in vivo compared to an empty control to investigate the effect of DBM dose and construct properties on bone augmentation. Overall, 3:1 constructs with higher DBM content achieved the greatest volume of bone augmentation, exceeding 1:1 constructs and empty implants by 3- and 5-fold, respectively. As such, we have established that a synthetic, biodegradable hydrogel can function as a carrier for DBM, and that the volume of bone augmentation achieved by the constructs correlates directly to the DBM dose.
Collapse
|
32
|
Tian M, Han B, Tan H, You C. Preparation and characterization of galactosylated alginate-chitosan oligomer microcapsule for hepatocytes microencapsulation. Carbohydr Polym 2014; 112:502-11. [PMID: 25129774 DOI: 10.1016/j.carbpol.2014.06.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 06/10/2014] [Accepted: 06/11/2014] [Indexed: 02/05/2023]
Abstract
Galactosylated alginate (GA)-chitosan oligomer microcapsule was prepared to provide a sufficient mechanical stability, a selective permeability and an appropriate three-dimensional (3D) microenvironment for hepatocytes microencapsulation. The microcapsule has a unique asymmetric membrane structure, with a dense layer located in the inner surface and gradually decreasing toward the outside surface. The stable microcapsule was obtained when GA lower than 50%, while the permeability was increased with increasing of GA. A balance between mechanical stability and permeability was achieved through modulating membrane porosity and thickness. The optimal microcapsule displays a selective permeability allowing efficient transport of human serum albumin while effectively blocking immunoglobulin G. Hepatocytes exhibited high and long term viability (>92%), proliferability, multicellular spheroid morphology, and enhancement of liver-specific functions in the microcapsule wherein galactose moieties present chemical cues to support cell-matrix interactions while the 3D structure of the microcapsule behaves physical cues to facilitate cell-cell interactions.
Collapse
Affiliation(s)
- Meng Tian
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, PR China
| | - Bo Han
- Department of Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA 90032, USA; Department of Biomedical Engineering, University of Southern California, Los Angeles, CA 90032, USA
| | - Hong Tan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, PR China
| | - Chao You
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, PR China.
| |
Collapse
|
33
|
Supper S, Anton N, Seidel N, Riemenschnitter M, Curdy C, Vandamme T. Thermosensitive chitosan/glycerophosphate-based hydrogel and its derivatives in pharmaceutical and biomedical applications. Expert Opin Drug Deliv 2013; 11:249-67. [PMID: 24304097 DOI: 10.1517/17425247.2014.867326] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
INTRODUCTION Thermogelling chitosan (CS)/glycerophosphate (GP) solutions have been reported as a new type of parenteral in situ forming depot system. These free-flowing solutions at ambient temperature turn into semi-solid hydrogels after parenteral administration. AREAS COVERED Formulation parameters such as CS physico-chemical characteristics, CS/gelling agent ratio or pH of the system, were acknowledged as key parameters affecting the solution stability, the sol/gel transition behavior and/or the final hydrogel structure. We discuss also the use of the standard CS/GP thermogels for various biomedical applications, including drug delivery and tissue engineering. Furthermore, this manuscript reviews the different strategies implemented to improve the hydrogel characteristics such as combination with carrier particles, replacement of GP, addition of a second polymer and chemical modification of CS. EXPERT OPINION The recent advances in the formulation of CS-based thermogelling systems already overcame several challenges faced by the standard CS/GP system. Dispersion of drug-loaded carrier particles into the thermogels allowed achieving prolonged release profiles for low molecular weight drugs; incorporation of an additional polymer enabled to strengthen the network, while the use of chemically modified CS led to enhanced pH sensitivity or biodegradability of the matrix.
Collapse
Affiliation(s)
- Stephanie Supper
- Novartis Pharma AG, Technical Research & Development (TRD) , Basel, 4002 , Switzerland
| | | | | | | | | | | |
Collapse
|
34
|
Pok S, Myers JD, Madihally SV, Jacot JG. A multilayered scaffold of a chitosan and gelatin hydrogel supported by a PCL core for cardiac tissue engineering. Acta Biomater 2013; 9:5630-42. [PMID: 23128158 DOI: 10.1016/j.actbio.2012.10.032] [Citation(s) in RCA: 131] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Revised: 10/22/2012] [Accepted: 10/26/2012] [Indexed: 10/27/2022]
Abstract
A three-dimensional scaffold composed of self-assembled polycaprolactone (PCL) sandwiched in a gelatin-chitosan hydrogel was developed for use as a biodegradable patch with a potential for surgical reconstruction of congenital heart defects. The PCL core provides surgical handling, suturability and high initial tensile strength, while the gelatin-chitosan scaffold allows for cell attachment, with pore size and mechanical properties conducive to cardiomyocyte migration and function. The ultimate tensile stress of the PCL core, made from blends of 10, 46 and 80kDa (Mn) PCL, was controllable in the range of 2-4MPa, with lower average molecular weight PCL blends correlating with lower tensile stress. Blends with lower molecular weight PCL also had faster degradation (controllable from 0% to 7% weight loss in saline over 30 days) and larger pores. PCL scaffolds supporting a gelatin-chitosan emulsion gel showed no significant alteration in tensile stress, strain or tensile modulus. However, the compressive modulus of the composite tissue was similar to that of native tissue (∼15kPa for 50% gelatin and 50% chitosan). Electron microscopy revealed that the gelatin-chitosan gel had a three-dimensional porous structure, with a mean pore diameter of ∼80μm, showed migration of neonatal rat ventricular myocytes (NRVM), maintained NRVM viability for over 7 days, and resulted in spontaneously beating scaffolds. This multi-layered scaffold has sufficient tensile strength and surgical handling for use as a cardiac patch, while allowing migration or pre-loading of cardiac cells in a biomimetic environment to allow for eventual degradation of the patch and incorporation into native tissue.
Collapse
|