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Theruvath AJ, Mahmoud EE, Wu W, Nejadnik H, Kiru L, Liang T, Felt S, Daldrup-Link HE. Ascorbic Acid and Iron Supplement Treatment Improves Stem Cell-Mediated Cartilage Regeneration in a Minipig Model. Am J Sports Med 2021; 49:1861-1870. [PMID: 33872071 PMCID: PMC8177720 DOI: 10.1177/03635465211005754] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The transplantation of mesenchymal stem cells (MSCs) into cartilage defects has led to variable cartilage repair outcomes. Previous in vitro studies have shown that ascorbic acid and reduced iron independently can improve the chondrogenic differentiation of MSCs. However, the combined effect of ascorbic acid and iron supplementation on MSC differentiation has not been investigated. PURPOSE To investigate the combined in vivo effects of ascorbic acid and a US Food and Drug Administration (FDA)-approved iron supplement on MSC-mediated cartilage repair in mature Göttingen minipigs. STUDY DESIGN Controlled laboratory study. METHODS We pretreated bone marrow-derived MSCs with ascorbic acid and the FDA-approved iron supplement ferumoxytol and then transplanted the MSCs into full-thickness cartilage defects in the distal femurs of Göttingen minipigs. Untreated cartilage defects served as negative controls. We evaluated the cartilage repair site with magnetic resonance imaging at 4 and 12 weeks after MSC implantation, followed by histological examination and immunofluorescence staining at 12 weeks. RESULTS Ascorbic acid plus iron-pretreated MSCs demonstrated a significantly better MOCART (magnetic resonance observation of cartilage repair tissue) score (73.8 ± 15.5), better macroscopic cartilage regeneration score according to the International Cartilage Repair Society (8.6 ± 2.0), better Pineda score (2.9 ± 0.8), and larger amount of collagen type II (28,469 ± 21,313) compared with untreated controls (41.3 ± 2.5, 1.8 ± 2.9, 12.8 ± 1.9, and 905 ± 1326, respectively). The obtained scores were also better than scores previously reported in the same animal model for MSC implants without ascorbic acid. CONCLUSION Pretreatment of MSCs with ascorbic acid and an FDA-approved iron supplement improved the chondrogenesis of MSCs and led to hyaline-like cartilage regeneration in the knee joints of minipigs. CLINICAL RELEVANCE Ascorbic acid and iron supplements are immediately clinically applicable. Thus, these results, in principle, could be translated into clinical applications.
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Affiliation(s)
- Ashok Joseph Theruvath
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), School of Medicine, Stanford University, California, USA.,Institute of Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California, USA
| | - Elhussein Elbadry Mahmoud
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), School of Medicine, Stanford University, California, USA.,Institute of Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California, USA.,Department of Surgery, School of Veterinary Medicine, South Valley University, Qena, Egypt
| | - Wei Wu
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), School of Medicine, Stanford University, California, USA.,Institute of Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California, USA
| | - Hossein Nejadnik
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), School of Medicine, Stanford University, California, USA.,Institute of Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California, USA
| | - Louise Kiru
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), School of Medicine, Stanford University, California, USA.,Institute of Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California, USA
| | - Tie Liang
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), School of Medicine, Stanford University, California, USA
| | - Stephen Felt
- Department of Comparative Medicine, School of Medicine, Stanford University, Stanford, California, USA
| | - Heike Elisabeth Daldrup-Link
- Department of Radiology, Molecular Imaging Program at Stanford (MIPS), School of Medicine, Stanford University, California, USA.,Institute of Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California, USA.,Department of Pediatrics, School of Medicine, Stanford University, Stanford, California, USA.,Address correspondence to Heike E. Daldrup-Link, MD, PhD, Department of Radiology, Molecular Imaging Program at Stanford (MIPS), School of Medicine, Stanford University, CA, 94305, USA ()
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Mahmoud EE, Adachi N, Mawas AS, Gaarour OS, Ochi M. Coculturing of mesenchymal stem cells of different sources improved regenerative capability of osteochondral defect in the mature rabbit: An in vivo study. J Orthop Surg (Hong Kong) 2020; 27:2309499019839850. [PMID: 30955439 DOI: 10.1177/2309499019839850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
PURPOSE Choosing a therapeutic cell source for osteochondral repair remains a challenge. The present study investigated coculturing mesenchymal stem cells (MSCs) from different sources to provide an improved therapeutic cell option for osteochondral repair. METHODS Dutch and Japanese white rabbits were used in this study, the first for isolating MSCs and the second for creating an osteochondral model in the medial femoral condyle. The 26 rabbit knees were divided randomly into four groups: control ( n = 6), bone marrow-derived MSCs (BMSCs) ( n = 7), synovial tissue MSCs (SMSCs) ( n = 7), and cocultured MSCs ( n = 6). Tissue repair was assessed using the Fortier scale, and colony-forming assay was performed. RESULTS At different cell densities, cocultured and SMSCs formed larger colonies than BMSCs, indicating their high proliferative potential. After 2 months, complete filling of the defect with smooth surface regularity was detected in the cocultured MSC group, although there was no significant difference among the therapeutic groups macroscopically. Also, tissue repair was histologically better in the cocultured MSC group than in the control and SMSC groups, due to repair of the subchondral bone and coverage with hyaline cartilage. Additionally, toluidine blue and collagen-II staining intensity in the repaired tissue was better in the cocultured MSC group than in the remaining groups. CONCLUSION Our results suggest that cocultured MSCs are a suitable option for the regeneration capability of osteochondral defects due to their enhanced osteochondrogenic potential.
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Affiliation(s)
| | - Nobuo Adachi
- 2 Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Amany Sayed Mawas
- 3 Department of Pathology & Clinical Pathology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
| | - Osama Samir Gaarour
- 4 Department of orthopaedic Surgery, Faculty of Medicine, Mansoura University, Egypt
| | - Mitsuo Ochi
- 2 Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
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Mahmoud EE, Adachi N, Mawas AS, Deie M, Ochi M. Multiple intra-articular injections of allogeneic bone marrow-derived stem cells potentially improve knee lesions resulting from surgically induced osteoarthritis: an animal study. Bone Joint J 2019; 101-B:824-831. [PMID: 31256666 DOI: 10.1302/0301-620x.101b7.bjj-2018-1532.r1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
AIM Mesenchymal stem cells (MSCs) have several properties that may support their use as an early treatment option for osteoarthritis (OA). This study investigated the role of multiple injections of allogeneic bone marrow-derived stem cells (BMSCs) to alleviate the progression of osteoarthritic changes in the various structures of the mature rabbit knee in an anterior cruciate ligament (ACL)-deficient OA model. MATERIALS AND METHODS Two months after bilateral section of the ACL of Japanese white rabbits aged nine months or more, either phosphate buffered saline (PBS) or 1 x 106 MSCs were injected into the knee joint in single or three consecutive doses. After two months, the articular cartilage and meniscus were assessed macroscopically, histologically, and immunohistochemically using collagen I and II. RESULTS Within the PBS injection (control group), typical progressive degenerative changes were revealed in the various knee structures. In the single MSC injection (single group), osteoarthritic changes were attenuated, but still appeared, especially in the medial compartments involving fibrillation of the articular cartilage, osteophyte formation in the medial plateau, and longitudinal tear of the meniscus. In the multiple-injections group, the smoothness and texture of the articular cartilage and meniscus were improved. Histologically, absence or reduction in matrix staining and cellularity were noticeable in the control and single-injection groups, respectively, in contrast to the multiple-injections group, which showed good intensity of matrix staining and chondrocyte distribution in the various cartilage zones. Osteoarthritis Research Society International (OARSI) scoring showed significantly better results in the multiple-injections group than in the other groups. Immunohistochemically, collagen I existed superficially in the medial femoral condyle in the single group, while collagen II was more evident in the multiple-injections group than the single-injection group. CONCLUSION A single injection of MSCs was not enough to restore the condition of osteoarthritic joints. This is in contrast to multiple injections of MSCs, which had the ability to replace lost cells, as well as reducing inflammation. Cite this article: Bone Joint J 2019;101-B:824-831.
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Affiliation(s)
- E E Mahmoud
- Department of Surgery, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
| | - N Adachi
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - A S Mawas
- Department of Pathology and Clinical Pathology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
| | - M Deie
- Department of Orthopaedic Surgery, Aichi Medical University, Aichi, Japan
| | - M Ochi
- Hiroshima University, Hiroshima, Japan
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Mahmoud EE, Kamei N, Kamei G, Nakasa T, Shimizu R, Harada Y, Adachi N, Misk NA, Ochi M. Role of Mesenchymal Stem Cells Densities When Injected as Suspension in Joints with Osteochondral Defects. Cartilage 2019; 10:61-69. [PMID: 28486813 PMCID: PMC6376564 DOI: 10.1177/1947603517708333] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE The aim of this study was to evaluate an intraarticular injection of different doses of autologous mesenchymal stem cells (MSCs) for improving repair of midterm osteochondral defect. DESIGN At 4 weeks postoperative marrow stimulation model bilaterally (3 mm diameter; 4 mm depth) in the medial femoral condyle, autologous MSCs were injected into knee joint. Twenty-four Japanese rabbits aged 6 months were divided randomly into 4 groups ( n = 6 per group): the control group and and MSC groups including 0.125, 1.25, and 6.25 million MSCs. Repaired tissue was assessed macroscopically and histologically at 4 and 12 weeks after intraarticular injection of MSCs. RESULTS At 12 weeks, there was no repair tissue in the control group. The gross appearance of the 1.25 and 6.25 million MSC groups revealed complete repair of the defect with white to pink tissue at 12 weeks. An osteochondral repair was histologically significantly better in the 1.25 and 6.25 million MSC groups than in the control and 0.125 million MSC groups at 4 and 12 weeks, due to presence of hyaline-like tissue in the deep layer at 4 weeks, and at 12 weeks hyaline cartilage formation at the periphery and fibrous tissue containing some chondrocytes in the deep layer of the center of the defect. Subchondral bone was restructured in the 1.25 and 6.25 million MSC groups, although it did not resemble the normal bone. CONCLUSION An intraarticular injection of 1.25 or 6.25 million MSCs could promote the repair of subchondral bone, even in the case of midterm osteochondral defect.
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Affiliation(s)
- Elhussein Elbadry Mahmoud
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan,Department of Surgery, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
| | - Naosuke Kamei
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan,Naosuke Kamei, Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan.
| | - Goki Kamei
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Tomoyuki Nakasa
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Ryo Shimizu
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yohei Harada
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Nobuo Adachi
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Nabil Ahmed Misk
- Department of Surgery, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
| | - Mitsuo Ochi
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
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Mahmoud EE, Tanaka Y, Kamei N, Harada Y, Ohdan H, Adachi N, Ochi M. Monitoring immune response after allogeneic transplantation of mesenchymal stem cells for osteochondral repair. J Tissue Eng Regen Med 2017; 12:e275-e286. [DOI: 10.1002/term.2413] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 12/12/2016] [Accepted: 01/13/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Elhussein Elbadry Mahmoud
- Department of Orthopaedic Surgery, Integrated Health Sciences; Institute of Biomedical & Health Sciences, Hiroshima University; Hiroshima Japan
- Department of Surgery, Faculty of Veterinary Medicine; South Valley University; Qena Egypt
| | - Yuka Tanaka
- Department of Gastroenterological and Transplant Surgery, Applied Life Sciences; Institute of Biomedical & Health Sciences, Hiroshima University; Hiroshima Japan
| | - Naosuke Kamei
- Department of Orthopaedic Surgery, Integrated Health Sciences; Institute of Biomedical & Health Sciences, Hiroshima University; Hiroshima Japan
- Medical Center for Translational and Clinical Research; Hiroshima University Hospital; Hiroshima Japan
| | - Yohei Harada
- Department of Orthopaedic Surgery, Integrated Health Sciences; Institute of Biomedical & Health Sciences, Hiroshima University; Hiroshima Japan
| | - Hideki Ohdan
- Department of Gastroenterological and Transplant Surgery, Applied Life Sciences; Institute of Biomedical & Health Sciences, Hiroshima University; Hiroshima Japan
| | - Nobuo Adachi
- Department of Orthopaedic Surgery, Integrated Health Sciences; Institute of Biomedical & Health Sciences, Hiroshima University; Hiroshima Japan
| | - Mitsuo Ochi
- Department of Orthopaedic Surgery, Integrated Health Sciences; Institute of Biomedical & Health Sciences, Hiroshima University; Hiroshima Japan
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Nakasa T, Yoshizuka M, Andry Usman M, Elbadry Mahmoud E, Ochi M. MicroRNAs and Bone Regeneration. Curr Genomics 2016; 16:441-52. [PMID: 27019619 PMCID: PMC4765532 DOI: 10.2174/1389202916666150817213630] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 05/18/2015] [Accepted: 05/22/2015] [Indexed: 12/14/2022] Open
Abstract
Bone has multiple functions, both morphologically and physiologically, and it frequently features in the pathological condition, including fracture and osteoporosis. For bone regeneration therapy, the regulation of osteoblast differentiation is important. MicroRNA (miRNA)s are short noncoding RNA which regulate gene expression at the post-transcriptional level. MiRNAs play an important role not only in a variety of other cellular processes including differentiation, proliferation, and apoptosis but also in the pathogenesis of human diseases. Recently, miRNAs have been known to participate in osteoblast differentiation by regulating several signaling pathways including transcription
factors. New insight into the mechanism during osteogenes is affected by miRNAs has been gained. Moreover, therapeutic trials for bone diseases including osteoporosis, fracture and bone defects targeting miRNAs have been examined in animal models. MiRNA therapy will enable development of a bone regeneration therapy.
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Affiliation(s)
- Tomoyuki Nakasa
- Department of Orthopaedics Surgery, Integrated Health Sciences, Institute of Biomedical & health Science, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima City, 734-8551, Japan
| | - Masaaki Yoshizuka
- Department of Orthopaedics Surgery, Integrated Health Sciences, Institute of Biomedical & health Science, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima City, 734-8551, Japan
| | - Muhammad Andry Usman
- Department of Orthopaedics Surgery, Integrated Health Sciences, Institute of Biomedical & health Science, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima City, 734-8551, Japan
| | - Elhussein Elbadry Mahmoud
- Department of Orthopaedics Surgery, Integrated Health Sciences, Institute of Biomedical & health Science, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima City, 734-8551, Japan
| | - Mitsuo Ochi
- Department of Orthopaedics Surgery, Integrated Health Sciences, Institute of Biomedical & health Science, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima City, 734-8551, Japan
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Harada Y, Nakasa T, Mahmoud EE, Kamei G, Adachi N, Deie M, Ochi M. Combination therapy with intra-articular injection of mesenchymal stem cells and articulated joint distraction for repair of a chronic osteochondral defect in the rabbit. J Orthop Res 2015; 33:1466-73. [PMID: 26174695 DOI: 10.1002/jor.22922] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 04/07/2015] [Indexed: 02/04/2023]
Abstract
The present study investigated intra-articular injection of bone-marrow-derived mesenchymal stem cells (MSCs) combined with articulated joint distraction as treatment for osteochondral defects. Large osteochondral defects were created in the weight-bearing area of the medial femoral condyle in rabbit knees. Four weeks after defect creation, rabbits were divided into six groups: control group, MSC group, distraction group, distraction + MSC group, temporary distraction group, and temporary distraction + MSC group. Groups with MSC received intra-articular injection of MSCs. Groups with distraction underwent articulated distraction arthroplasty. Groups with temporary distraction discontinued the distraction after 4 weeks. The rabbits were euthanized at 4, 8, and 12 weeks after treatment except temporary distraction groups which were euthanized at only 12 weeks. Histological scores in the distraction + MSC group were significantly better than in the control, MSC group or distraction group at 4 and 8 weeks, but showed no further improvement. At 12 weeks, the temporary distraction + MSC group showed the best results, demonstrating hyaline cartilage repair with regeneration of the osteochondral junction. In conclusion, joint distraction with intra-articular injection of MSCs promotes early cartilage repair, and compressive loading of the repair tissue after temporary distraction stimulates articular cartilage regeneration.
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Affiliation(s)
- Yohei Harada
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Tomoyuki Nakasa
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Elhussein Elbadry Mahmoud
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Goki Kamei
- Department of Orthopaedic Surgery, Miyoshi Central Hospital, 531 Higashisakeyamachi, Miyoshi, Hiroshima, 728-8502, Japan
| | - Nobuo Adachi
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
| | - Masataka Deie
- Department of Musculoskeletal Functional Research and Regeneration, Institute of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8553, Japan
| | - Mitsuo Ochi
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
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Mahmoud EE, Kamei G, Harada Y, Shimizu R, Kamei N, Adachi N, Misk NA, Ochi M. Cell Magnetic Targeting System for Repair of Severe Chronic Osteochondral Defect in a Rabbit Model. Cell Transplant 2015; 25:1073-83. [PMID: 26419946 DOI: 10.3727/096368915x689613] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The aim of this study was to investigate a cell delivery system for repair of severe chronic osteochondral defects using magnetically labeled mesenchymal stem cells (m-MSCs), with the aid of an external magnetic device, through the accumulation of a small number of m-MSCs into a desired area and to detect the suitable number of autologous m-MSCs needed for repair of the defect. Twenty-six male Japanese white rabbits aged 6 months were used. An osteochondral defect was created bilaterally at the weight-bearing surface of the medial femoral condyle of the rabbits' knees (3 mm diameter; 4 mm depth). At 4 weeks after creation of the defect, autogenic transplantation of the m-MSCs into the defect area was performed, followed by 10-min exposure to an external magnetic device, where animals were divided into four groups: high (1 × 10(6) m-MSCs), medium (2 × 10(5) m-MSCs), low (4 × 10(4) m-MSCs), and control (PBS injection). At 4 and 12 weeks posttransplantation of m-MSCs, repaired tissue was assessed histologically using the Fortier score with toluidine blue staining. Transplantation of a low number of m-MSCs was not enough to improve osteogenesis and chondrogenesis, but the medium and high groups improved repair of the chronic defect with chondrogenic tissues and showed histologically significantly better results than the control and low groups. The use of a magnetic targeting system for delivering m-MSCs has the potential to overcome the clinical hurdles for repair of the severe chronic osteochondral defect. Furthermore, this system is predicted to produce good clinical outcomes for humans, not only to repair osteochondral defects but also to repair a variety of damaged tissues.
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Affiliation(s)
- Elhussein Elbadry Mahmoud
- Department of Orthopaedic Surgery, Integrated Health Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Shimizu R, Kamei N, Adachi N, Hamanishi M, Kamei G, Mahmoud EE, Nakano T, Iwata T, Yamato M, Okano T, Ochi M. Repair mechanism of osteochondral defect promoted by bioengineered chondrocyte sheet. Tissue Eng Part A 2014; 21:1131-41. [PMID: 25396711 DOI: 10.1089/ten.tea.2014.0310] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Cell sheet engineering has developed as a remarkable method for cell transplantation. In the field of cartilage regeneration, several studies previously reported that cartilage defects could be regenerated by transplantation of a chondrocyte sheet using cell sheet engineering. However, it remains unclear how such a thin cell sheet could repair a deep cartilage defect. We, therefore, focused on the mechanism of cartilage repair using cell sheet engineering in this study. Chondrocyte sheets and synovial cell sheets were fabricated using cell sheet engineering, and these allogenic cell sheets were transplanted to cover an osteochondral defect in a rat model. Macroscopic and histological evaluation was performed at 4 and 12 weeks after transplantation. Analysis of the gene expression of each cell sheet and of the regenerated tissue at 1 week after transplantation was performed. In addition, green fluorescent protein (GFP) transgenic rats were used as donors (transplanted chondrocyte sheets) or recipients (osteochondral defect models) to identify the cell origin of regenerated cartilage. Cartilage repair was significantly better in the group implanted with a chondrocyte sheet than in that with a synovial cell sheet. The results of gene expression analysis suggest that the possible factor contributing to cartilage repair might be TGFβ1. Cell tracking experiments using GFP transgenic rats showed that the regenerated cartilage was largely composed of cells derived from the transplanted chondrocyte sheets.
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Affiliation(s)
- Ryo Shimizu
- 1 Department of Orthopaedic Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University , Hiroshima, Japan
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