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Pagotto VPF, Camargo CP, Cáceres PV, Altran SC, Gemperli R. Adipose tissue-derived stem cells as a therapeutic strategy for enterocutaneous fistula: an experimental model study. Acta Cir Bras 2023; 38:e384523. [PMID: 37851787 PMCID: PMC10578092 DOI: 10.1590/acb384523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 08/14/2023] [Indexed: 10/20/2023] Open
Abstract
PURPOSE Enterocutaneous fistula (ECF) is a condition in which there is an abnormal connection between the intestinal tract and the skin. It can lead to high morbidity and mortality rates despite the availability of therapeutic options. Stem cells have emerged as a potential strategy to treat ECF. This study aimed to evaluate the effect of adipose tissue-derived stem cells (ASC) on ECF in an experimental model. METHODS ECF was induced in 21 Wistar rats, and after one month, they were divided into three groups: control group (C), culture medium without ASC group (CM), and allogeneic ASC group (ASC). After 30 days, the animals underwent macroscopic analysis of ECF diameter and histopathological analysis of inflammatory cells, tissue fibrosis, and vascular density. RESULTS The study found a 55% decrease in the ECF diameter in the ASC group (4.5 ± 1.4 mm) compared to the control group (10.0 ± 2.1 mm, p = 0.001) and a 59.1% decrease in the CM group (11.0 ± 4.3 mm, p = 0.003). The fibrosis score in the ASC group was 20.9% lower than the control group (p = 0.03). There were no significant differences in inflammation scores among the three groups. CONCLUSIONS This study suggests that ASC treatment can reduce ECF diameter, and reduction in tissue fibrosis may be a related mechanism. Further studies are needed to understand the underlying mechanisms fully.
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Affiliation(s)
- Vitor Penteado Figueiredo Pagotto
- Universidade de São Paulo – Faculdade de Medicina – Disciplina de Cirurgia Plástica – São Paulo (SP) – Brazil
- Universidade de São Paulo – Faculdade de Medicina – Hospital das Clínicas – Serviço de Cirurgia Plástica – São Paulo (SP) – Brazil
| | - Cristina Pires Camargo
- Universidade de São Paulo – Faculdade de Medicina – Disciplina de Cirurgia Plástica – São Paulo (SP) – Brazil
- Universidade de São Paulo – Faculdade de Medicina – Hospital das Clínicas – Serviço de Cirurgia Plástica – São Paulo (SP) – Brazil
- Universidade de São Paulo – Faculdade de Medicina – Laboratório de Investigação Médica – São Paulo (SP) – Brazil
| | - Paula Vitória Cáceres
- Universidade de São Paulo – Faculdade de Medicina – Laboratório de Investigação Médica – São Paulo (SP) – Brazil
| | - Silvana Cereijido Altran
- Universidade de São Paulo – Faculdade de Medicina – Laboratório de Investigação Médica – São Paulo (SP) – Brazil
| | - Rolf Gemperli
- Universidade de São Paulo – Faculdade de Medicina – Disciplina de Cirurgia Plástica – São Paulo (SP) – Brazil
- Universidade de São Paulo – Faculdade de Medicina – Hospital das Clínicas – Serviço de Cirurgia Plástica – São Paulo (SP) – Brazil
- Universidade de São Paulo – Faculdade de Medicina – Laboratório de Investigação Médica – São Paulo (SP) – Brazil
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Human Mesenchymal Stem Cell Sheets Improve Uterine Incision Repair in a Rodent Hysterotomy Model. Am J Perinatol 2022; 39:1212-1222. [PMID: 33368093 DOI: 10.1055/s-0040-1721718] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
OBJECTIVE The study aimed to assess the feasibility of creating and transplanting human umbilical cord mesenchymal stem cell sheets applied to a rat model of hysterotomy, and additionally to determine benefits of human umbilical cord mesenchymal stem cell sheet transplantation in reducing uterine fibrosis and scarring. STUDY DESIGN Human umbilical cord mesenchymal stem cell sheets are generated by culturing human umbilical cord mesenchymal stem cells on thermo-responsive cell culture plates. The temperature-sensitive property of these culture dishes facilitates normal cell culture in a thin contiguous layer and allows for reliable recovery of intact stem cell sheets without use of destructive proteolytic enzymes.We developed a rat hysterotomy model using nude rats. The rat uterus has two distinct horns: one horn provided a control/untreated scarring site, while the second horn was the cell sheet transplantation site.On day 14 following surgery, complete uteri were harvested and subjected to histologic evaluations of all hysterotomy sites. RESULTS The stem cell sheet culture process yielded human umbilical cord mesenchymal stem cell sheets with surface area of approximately 1 cm2.Mean myometrial thickness in the cell sheet-transplanted group was 274 μm compared with 191 μm in the control group (p = 0.02). Mean fibrotic surface area in the human umbilical cord mesenchymal stem cell sheet-transplanted group was 95,861 μm2 compared with 129,185 μm2 in the control group. Compared with control horn sites, cell sheet-transplanted horns exhibited significantly smaller fibrotic-to-normal myometrium ratios (0.18 vs. 0.27, respectively, p = 0.029). Mean number of fibroblasts in cell sheet-transplanted horns was significantly smaller than the control horns (483 vs. 716/mm2, respectively, p = 0.001). CONCLUSION Human umbilical cord mesenchymal stem cell sheet transplantation is feasible in a rat model of hysterotomy. Furthermore, use of stem cell sheets reduces fibroblast infiltration and uterine scar fibrotic tissue formation during hysterotomy healing, potentially mitigating risks of uterine scar formation. KEY POINTS · Stem cell sheet transplanted to hysterotomy promotes myometrial regeneration and reduced fibrotic tissue formation.. · This study demonstrates the feasibility of using human umbilical cord mesenchymal stem cell sheets..
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Utria AF, Labadie KP, Abbasi A, Gui X, Pillarisetty VG, Park JO, Sham JG. A novel rat model for the study of postoperative pancreatic fistula. Lab Anim 2022; 56:519-527. [PMID: 35765854 DOI: 10.1177/00236772221107347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
While over the past several decades mortality after pancreatic surgery has decreased to <5%, postoperative morbidity remains remarkably high, ranging from 15% to 65%. The development of a postoperative pancreatic fistula (POPF) is a significant contributor to morbidity in patients undergoing pancreatic surgery. POPF can lead to life-threatening conditions such as intra-abdominal abscess, uncontrolled hemorrhage, sepsis, and death. Rates of POPF have not significantly changed over time, despite the introduction of multiple technical and pharmacologic interventions aimed at their treatment and prevention. Unfortunately, there are few POPF experimental models that have been described in the literature and existing models are unable to reliably reproduce the clinical sequelae of POPF, limiting the development of new methods to prevent and treat POPF. Herein, we describe a new rat experimental model that reliably creates a POPF via transection of the common pancreatic duct.
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Affiliation(s)
- Alan F Utria
- University of Iowa Hospitals and Clinics, Iowa City, USA
| | | | | | | | - Venu G Pillarisetty
- University of Washington, Seattle, USA.,Fred Hutchinson Cancer Center, Seattle, USA
| | - James O Park
- University of Washington, Seattle, USA.,Fred Hutchinson Cancer Center, Seattle, USA
| | - Jonathan G Sham
- University of Washington, Seattle, USA.,Fred Hutchinson Cancer Center, Seattle, USA
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Choi JH, Shim IK, Shin MJ, Lee YN, Koh KH. Stem cell sheet interpositioned between the tendon and bone would be better for healing than stem cell sheet overlaid above the tendon-to-bone junction in rotator cuff repair of rats. PLoS One 2022; 17:e0266030. [PMID: 35324992 PMCID: PMC8947210 DOI: 10.1371/journal.pone.0266030] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 03/11/2022] [Indexed: 11/23/2022] Open
Abstract
Background Although stem cells might enhance natural enthesis healing in surgical rotator cuff repair, not much attention has been given to the delivery and location of delivering stem cells. The purpose of this study to know where to locate those stem cells during repair. Methods Animal model of chronic rotator cuff tear was created in 24 rats. Adipose-derived stem cells were engineered as a sheet and transplanted 1) between a torn tendon and humerus (interposition group) or 2) over a repaired tendon-to-bone junction (overlay group) at the time of surgical repair. Tracking of stem cells with overexpression of green fluorescent protein (GFP) were carried out at the time of sacrifice in additional 4 shoulders in each group. Histological and Biomechanical evaluation was performed to compare the differences in tendon-to-bone healing. Results Histology showed increased fibrocartilage, a clear boundary at the mineralized fibrocartilage, abundant collagen type III, and higher total scores, especially in the interposition group. GFP-overexpression was observed at the transplanted site at 2 weeks after repair. Although two groups where stem cell sheets applied showed higher load to failure than the repair-only group, the load to failure was not different between the interposition and overlay group. Conclusion In the chronic rotator cuff repair model, stem cell sheets enhanced regeneration of the tendon-to-bone junction. This regeneration was effective when the stem cell sheet was interpositioned at the tendon-to-bone interface. Level of evidence Basic Science Study; In Vivo Animal Model; Histology and Biomechanics.
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Affiliation(s)
- Jae hee Choi
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - In Kyong Shim
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | | | - Yu Na Lee
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Kyoung Hwan Koh
- Department of Orthopaedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- * E-mail:
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Sebbagh AC, Rosenbaum B, Péré G, Alric H, Berger A, Wilhelm C, Gazeau F, Mathieu N, Rahmi G, Silva AKA. Regenerative medicine for digestive fistulae therapy: Benefits, challenges and promises of stem/stromal cells and emergent perspectives via their extracellular vesicles. Adv Drug Deliv Rev 2021; 179:113841. [PMID: 34175308 DOI: 10.1016/j.addr.2021.113841] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/29/2021] [Accepted: 06/15/2021] [Indexed: 12/11/2022]
Abstract
Despite current management strategies, digestive fistulae remain extremely debilitating complications associated with significant morbidity and mortality, generating a need to develop innovative therapies in these indications. A number of clinical trials and experimental studies have thus investigated the potential of stem/stromal cells (SCs) or SC-derived extracellular vesicles (EVs) administration for post-surgical and Crohn's-associated fistulae. This review summarizes the physiopathology and current standards-of-care for digestive fistulae, along with relevant evidence from animal and clinical studies regarding SC or EV treatment for post-surgical digestive fistulae. Additionally, existing preclinical models of fistulizing Crohn's disease and results of SC therapy trials in this indication will be presented. The optimal formulation and administration protocol of SC therapy products for gastrointestinal fistula treatment and the challenges for a widespread use of darvadstrocel (Alofisel) in clinical practice will be discussed. Finally, the potential advantages of EV therapy and the obstacles towards their clinical translation will be introduced.
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Affiliation(s)
- Anna C Sebbagh
- Laboratoire Matière et Systèmes Complexes (MSC), Université de Paris/CNRS (UMR 7057), Paris, France
| | - Boris Rosenbaum
- Laboratoire Imagerie de l'Angiogénèse, Plateforme d'Imagerie du Petit Animal, Inserm UMR970, Paris Cardiovascular Research Center, Paris, France
| | - Guillaume Péré
- Laboratoire Matière et Systèmes Complexes (MSC), Université de Paris/CNRS (UMR 7057), Paris, France; Laboratoire Imagerie de l'Angiogénèse, Plateforme d'Imagerie du Petit Animal, Inserm UMR970, Paris Cardiovascular Research Center, Paris, France; Department of Digestive Surgery, Esogastric Bariatric and Endocrinal Surgery Unit, Toulouse-Rangueil University Hospital, Toulouse, France
| | - Hadrien Alric
- Laboratoire Matière et Systèmes Complexes (MSC), Université de Paris/CNRS (UMR 7057), Paris, France; Laboratoire Imagerie de l'Angiogénèse, Plateforme d'Imagerie du Petit Animal, Inserm UMR970, Paris Cardiovascular Research Center, Paris, France; Department of Gastroenterology and Endoscopy, Hôpital Européen Georges Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Arthur Berger
- Laboratoire Imagerie de l'Angiogénèse, Plateforme d'Imagerie du Petit Animal, Inserm UMR970, Paris Cardiovascular Research Center, Paris, France
| | - Claire Wilhelm
- Laboratoire Matière et Systèmes Complexes (MSC), Université de Paris/CNRS (UMR 7057), Paris, France
| | - Florence Gazeau
- Laboratoire Matière et Systèmes Complexes (MSC), Université de Paris/CNRS (UMR 7057), Paris, France
| | - Noëlle Mathieu
- Human Health Department, SERAMED, LRMED, Institute for Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France
| | - Gabriel Rahmi
- Laboratoire Imagerie de l'Angiogénèse, Plateforme d'Imagerie du Petit Animal, Inserm UMR970, Paris Cardiovascular Research Center, Paris, France; Department of Gastroenterology and Endoscopy, Hôpital Européen Georges Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France.
| | - Amanda K A Silva
- Laboratoire Matière et Systèmes Complexes (MSC), Université de Paris/CNRS (UMR 7057), Paris, France.
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Xue F, Bai Y, Jiang Y, Liu J, Jian K. Construction and a preliminary study of paracrine effect of bone marrow-derived endothelial progenitor cell sheet. Cell Tissue Bank 2021; 23:185-197. [PMID: 34052984 PMCID: PMC8854320 DOI: 10.1007/s10561-021-09932-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 04/21/2021] [Indexed: 12/14/2022]
Abstract
The release of paracrine factors from endothelial progenitor cell (EPC) sheet is a central mechanism of tissue repair. The purpose of this study was to constuct the rat bone marrow derived-endothelial progenitor cell (BM-EPCs) sheet and investigate invest the role of stromal cell-derived factor-1α (SDF-1α)/CXCR4 axis in the biological function of BM-EPCs sheet. BM-EPC cells were identified by the cell-surface markers-CD34/CD133/VE-cadherin/KDR using flow cytometry and dual affinity for acLDL and UEA-1. After 7 days of incubation, the BM-EPC single-cell suspensions were seeded on thermo-sensitive plate to harvest the BM-EPC cell sheets. The expression levels of SDF-1α/CXCR4 axis-associated genes and proteins were examined using RT-qPCR and western blot analysis, and enzyme-linked immunosorbent assay (ELISA) was applied to determine the concentration of vascular endothelial growth factor (VEGF), epidermal growth factor (EGF) and SDF-1α in the cell culture medium. The BM-EPC cell sheets were successfully harvested. Moreover, BM-EPC cell sheets have superior migration and tube formation activity when compared with single cell suspension. When capillary-like tube were formed from EPCs sheets, the releasing of paracrine factors such as VEGF, EGF and SDF-1α were increased. To reveal the mechanism of tube formation of BM-EPCs sheets, our research showed that the activation of PI3K/AKT/eNOS pathway was involved in the process, because the phosphorylation of CXCR, PI3K, AKT and eNOS were increased. BM-EPC cell sheets have superior paracrine and tube formation activity than the BM-EPC single-cell. The strong ability to secrete paracrine factors was be potentially related to the SDF-1α/CXCR4 axis through PI3K/AKT/eNOS pathway.
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Affiliation(s)
- Fenlong Xue
- Department of Cardiovascular Surgery, Tianjin First Central Hospital, Tianjin, 300192, China
| | - Yunpeng Bai
- Department of Cardiovascular Surgery, Tianjin Chest Hospital, Tianjin, 300051, China
| | - Yiyao Jiang
- Department of Cardiovascular Surgery, Tianjin First Central Hospital, Tianjin, 300192, China
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Bengbu Medical College, Anhui, 233004, China
| | - Jianshi Liu
- Department of Cardiovascular Surgery, DeltaHealth Hospital Shanghai, Shanghai, 200336, China
| | - Kaitao Jian
- Department of Cardiovascular Surgery, Tianjin Chest Hospital, Tianjin, 300051, China.
- Department of Cardiovascular Surgery, DeltaHealth Hospital Shanghai, Shanghai, 200336, China.
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Kuscher S, Kiehl T, Kronberger IE, Moser P, Maier H, Maier S, Hautz T, Öfner D, Schneeberger S, Troppmair J. Distal Pancreatic Resection with Splenectomy in the Rat: A Pancreatic Fistula Model to Investigate Postsurgical Damage? Eur Surg Res 2021; 62:97-104. [PMID: 34023826 DOI: 10.1159/000515867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 03/15/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND Postoperative pancreatic fistula (POPF) is a major complication in pancreatic surgery and can cause considerable postoperative morbidity. Advanced surgical-technical approaches to prevent POPF did not yield a substantial improvement. To investigate innovative treatments, experimental animal models of distal pancreatic resection and pancreaticoduodenectomy are of fundamental importance. After a failed attempt to replicate a previously described rat model for pancreatic fistula induction, we proceeded to distal pancreatic resection with splenectomy to provoke pancreatic leakage and generate a suitable animal model. METHODS Distal pancreatic resection with splenectomy was performed in 40 rats. The rats were sacrificed on postoperative day (POD) 1, 2, 4, 6, 8, or 10, and the abdominal cavity was explored. Ascites probes were collected pre- and postoperatively for the detection of pancreas amylase and lipase. Tissue samples from the naïve pancreas (POD 0) and the postoperatively harvested remnant were evaluated histologically. The extent of necrosis was determined, and samples were examined for neutrophil infiltration. TUNEL staining served for the verification of necrosis in distinct cases. Immunohistochemistry of Ki67, von Willebrand factor, and CD68 was performed to evaluate proliferation, blood-vessel sprouting, and macrophage invasion. RESULTS The rats showed no clinical symptoms or severe complications in the postoperative course up to 10 days. Abdominal exploration revealed adhesions in the upper abdomen, but no intra-abdominal fluid accumulations were found. Signs of inflammation and tissue damage were evident at the pancreatic resection margin on histological examination whereas the naïve pancreatic tissue was widely unaffected. Statistically significant differences were seen between the preoperative and postoperative extent of necrosis, the presence of neutrophil infiltrate, and levels of ascitic amylase and lipase. Immunohistochemical staining on Ki67, von Willebrand factor, and CD68 did not reveal any workable results on nonstatistical examination, and it was therefore not considered for further analyses. CONCLUSION Creating a functional animal model of pancreatic fistula that reflects the clinical and pathophysiological impact of pancreatic leakage in humans has not been achieved. Our approach of left pancreatic resection recapitulated inflammation and tissue damage, early events in the development of fistulas, and it could be suitable for the experimental testing of novel targeting methods.
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Affiliation(s)
- Stefanie Kuscher
- Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria.,Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Tobias Kiehl
- Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Irmgard Elisabeth Kronberger
- Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Patrizia Moser
- INNPATH, Institute of Pathology, Tirol Kliniken Innsbruck, Innsbruck, Austria
| | - Hans Maier
- INNPATH, Institute of Pathology, Tirol Kliniken Innsbruck, Innsbruck, Austria
| | - Sarah Maier
- Department of Medical Statistics, Informatics and Health Economics, Medical University of Innsbruck, Innsbruck, Austria
| | - Theresa Hautz
- Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Dietmar Öfner
- Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria.,Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Stefan Schneeberger
- Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria.,Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria
| | - Jakob Troppmair
- Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Center of Operative Medicine, Medical University of Innsbruck, Innsbruck, Austria
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Iwamoto K, Saito T, Takemoto Y, Ueno K, Yanagihara M, Furuya-Kondo T, Kurazumi H, Tanaka Y, Taura Y, Harada E, Hamano K. Autologous transplantation of multilayered fibroblast sheets prevents postoperative pancreatic fistula by regulating fibrosis and angiogenesis. Am J Transl Res 2021; 13:1257-1268. [PMID: 33841654 PMCID: PMC8014429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 01/11/2021] [Indexed: 06/12/2023]
Abstract
INTRODUCTION Postoperative pancreatic fistula (POPF) is a serious complication after gastrointestinal or pancreatic surgery. Despite intensive investigations, the occurrence has not significantly decreased in the past decades. The aims of this study were to clarify the pathophysiology of POPF and establish the preventive measures using multilayered fibroblast sheets. METHODS We developed a pancreatic fistula (PF) model of rat with transection of the splenic duct and surrounding pancreatic parenchyma. Multilayered fibroblast sheets prepared from tails were autologously transplanted to this model. The preventive effect was biochemically and histologically evaluated by measuring the ascitic levels of pancreatic enzymes and conducting immunohistochemistry and real-time polymerase chain reaction analyses of pancreatic tissue. Findings were compared to those obtained with acellular materials simply sealing the wound. RESULTS In the PF model, the ascitic levels of pancreatic enzymes were transiently up-regulated. Inflammation and necrosis were histologically observed in a wide range. Islets were damaged even in remote areas. Transplantation of multilayered fibroblast sheets dramatically reduced the ascitic leakage of enzymes, suppressed inflammation, and broadly preserved the islets. Compared with acellular materials, these sheets offered superior prevention of cellular activity through the spaciotemporal regulation of fibrosis and angiogenesis. Notably, the leakage hole appeared to have been plugged with the fibrotic matrix, which might have been the most crucial mechanism minimizing pancreatic damage. CONCLUSIONS The autologous transplantation of multilayered fibroblast sheets significantly prevented PF and protected the pancreas, underscoring the potential utility of this approach for POPF prevention.
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Affiliation(s)
- Keisuke Iwamoto
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of MedicineYamaguchi, Japan
| | - Toshiro Saito
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of MedicineYamaguchi, Japan
| | - Yoshihiro Takemoto
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of MedicineYamaguchi, Japan
| | - Koji Ueno
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of MedicineYamaguchi, Japan
| | - Masashi Yanagihara
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of MedicineYamaguchi, Japan
| | - Tomoko Furuya-Kondo
- Department of Molecular Pathology, Yamaguchi University Graduate School of MedicineYamaguchi, Japan
| | - Hiroshi Kurazumi
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of MedicineYamaguchi, Japan
| | - Yuya Tanaka
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of MedicineYamaguchi, Japan
| | - Yohei Taura
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of MedicineYamaguchi, Japan
| | - Eijiro Harada
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of MedicineYamaguchi, Japan
| | - Kimikazu Hamano
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of MedicineYamaguchi, Japan
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Kemmochi A, Tamura T, Shimizu Y, Owada Y, Ozawa Y, Hisakura K, Oda T, Kawano Y, Hanawa T, Ohkohchi N. A novel hydrogel sheet prevents postoperative pancreatic fistula in a rat model. JOURNAL OF HEPATO-BILIARY-PANCREATIC SCIENCES 2020; 28:192-201. [PMID: 33179402 PMCID: PMC7984228 DOI: 10.1002/jhbp.867] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 10/26/2020] [Accepted: 10/29/2020] [Indexed: 12/11/2022]
Abstract
Aim To evaluate the efficacy of a novel hydrogel sheet in preventing postoperative pancreatic fistula (POPF). Background Postoperative pancreatic fistula is a life‐threatening complication. As no study has reported the use of hydrogel sheets in preventing POPF, their effectiveness for that purpose remains unclear. Methods A novel hydrogel sheet made of polyvinyl alcohol (PVA) was prepared by the freeze‐thaw method. The pancreatic ducts and surrounding pancreatic parenchyma of rats were transected to induce a pancreatic fistula. Next, the sheet was attached to the transection site. Ascitic fluid amylase and lipase concentrations were measured. Neoveil®, a nonwoven polyglycolic acid (PGA) felt, is already clinically used as an absorbable reinforcing material at pancreatic transection sites. Neoveil® was used for comparison, as was VIEWGEL®, which is marketed as a wound dressing. Results The hydrogel sheet remained in place 48 hours postoperatively. The ascitic amylase concentrations in the control, VIEWGEL®‐treated, Neoveil®‐treated, and hydrogel‐treated rats, respectively, were 4992.4 ± 5355.7, 1068.4 ± 269.1, 730.2 ± 425.2, and 303.1 ± 240.1 IU/L; the ascitic lipase concentrations were 2279.8 ± 3395.2, 169.5 ± 100.6, 90.4 ± 71.0, and 86.8 ± 59.8 IU/L. The ascitic amylase and lipase levels were significantly lower in the hydrogel group than in the other groups (P < .05). Conclusions This novel hydrogel sheet effectively prevents pancreatic fistulas and has promising clinical application potential.
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Affiliation(s)
- Akira Kemmochi
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Takafumi Tamura
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Yoshio Shimizu
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Yohei Owada
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Yusuke Ozawa
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Katsuji Hisakura
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Tatsuya Oda
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Yayoi Kawano
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Takehisa Hanawa
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Nobuhiro Ohkohchi
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
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Shin MJ, Shim IK, Kim DM, Choi JH, Lee YN, Jeon IH, Kim H, Park D, Kholinne E, Yang HS, Koh KH. Engineered Cell Sheets for the Effective Delivery of Adipose-Derived Stem Cells for Tendon-to-Bone Healing. Am J Sports Med 2020; 48:3347-3358. [PMID: 33136454 DOI: 10.1177/0363546520964445] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Efforts are being made to treat rotator cuff tears (RCTs) that exhibit poor healing and high retear rates. Tendon-to-bone healing using mesenchymal stem cells is being explored, but research is needed to establish effective delivery options. PURPOSE To evaluate the effects of an adipose-derived stem cell (ADSC) sheet on mesenchymal stem cell delivery for tendon-to-bone healing of a chronic RCT in rats and to demonstrate that ADSC sheets enhance tendon-to-bone healing. STUDY DESIGN Controlled laboratory study. METHODS Mesenchymal stem cells were obtained from rat adipose tissue, and a cell sheet was prepared using a temperature-responsive dish. To evaluate the efficacy of stem cells produced in a sheet for the lesion, the experiment was conducted with 3 groups: repair group, cell sheet transplantation after repair group, and cell sheet-only group. Histological, biomechanical, and micro-computed tomography (micro-CT) results were compared among the groups. RESULTS Hematoxylin and eosin staining for histomorphological analysis revealed that the cell sheet transplantation after repair group (5.75 ± 0.95) showed statistically significant higher scores than the repair (2.75 ± 0.50) and cell sheet-only (3.25 ± 0.50) groups (P < .001). On safranin O staining, the cell sheet transplantation after repair group (0.51 ± 0.04 mm2) had a larger fibrocartilage area than the repair (0.31 ± 0.06 mm2) and cell sheet-only (0.32 ± 0.03 mm2) groups (P = .001). On micro-CT, bone volume/total volume values were significantly higher in the cell sheet transplantation after repair group (23.98% ± 1.75%) than in the other groups (P < .039); there was no significant difference in the other values. On the biomechanical test, the cell sheet transplantation after repair group (4 weeks after repair) showed significantly higher results than the other groups (P < .005). CONCLUSION Our study shows that engineered stem cells are a clinically feasible stem cell delivery tool for rotator cuff repair. CLINICAL RELEVANCE This laboratory study provides evidence that ADSCs are effective in repairing RCTs, which are common sports injuries.
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Affiliation(s)
- Myung Jin Shin
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - In Kyong Shim
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Dong Min Kim
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jae Hee Choi
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.,Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Yu Na Lee
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - In-Ho Jeon
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Hyojune Kim
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Dongjun Park
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Erica Kholinne
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.,Department of Orthopedic Surgery, St Carolus Hospital, Faculty of Medicine, Trisakti University, Jakarta, Indonesia
| | - Ha-Sol Yang
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Kyoung Hwan Koh
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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Ryu B, Sekine H, Homma J, Kobayashi T, Kobayashi E, Kawamata T, Shimizu T. Allogeneic adipose-derived mesenchymal stem cell sheet that produces neurological improvement with angiogenesis and neurogenesis in a rat stroke model. J Neurosurg 2020; 132:442-455. [PMID: 30797215 DOI: 10.3171/2018.11.jns182331] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 11/02/2018] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Stem cell therapy is a promising strategy for the treatment of severe cerebral ischemia. However, targeting sufficient grafted cells to the affected area remains challenging. Choosing an adequate transplantation method for the CNS appears crucial for this therapy to become a clinical reality. The authors used a scaffold-free cell sheet as a translational intervention. This method involves the use of cell sheet layers and allows the transplantation of a large number of cells, locally and noninvasively. The authors evaluated the effectiveness of allogeneic adipose tissue-derived mesenchymal stem cell sheets in a rat model of stroke. METHODS The animals, subjected to middle cerebral artery occlusion, were randomly divided in two groups: one in which a cell sheet was transplanted and the other in which a vehicle was used (n = 10/group). Over a period of 14 days after transplantation, the animals' behavior was evaluated, after which brain tissue samples were removed and fixed, and the extent of angiogenesis and infarct areas was evaluated histologically. RESULTS Compared to the vehicle group, in the cell sheet group functional angiogenesis and neurogenesis were significantly increased, which resulted in behavioral improvement. Transplanted cells were identified within newly formed perivascular walls as pericytes, a proportion of which were functional. Newly formed blood vessels were found within the cell sheet that had anastomosed to the cerebral blood vessels in the host. CONCLUSIONS The transplantation approach described here is expected to provide not only a paracrine effect but also a direct cell effect resulting in cell replacement that protects the damaged neurovascular unit. The behavioral improvement seen with this transplantation approach provides the basis for further research on cell sheet-based regenerative treatment as a translational treatment for patients with stroke.
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Affiliation(s)
- Bikei Ryu
- 1Institute of Advanced Biomedical Engineering and Science and.,2Department of Neurosurgery, Tokyo Women's Medical University; and
| | - Hidekazu Sekine
- 1Institute of Advanced Biomedical Engineering and Science and
| | - Jun Homma
- 1Institute of Advanced Biomedical Engineering and Science and
| | | | - Eiji Kobayashi
- 3Department of Organ Fabrication, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | | | - Tatsuya Shimizu
- 1Institute of Advanced Biomedical Engineering and Science and
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12
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Nakao M, Kim K, Nagase K, Grainger DW, Kanazawa H, Okano T. Phenotypic traits of mesenchymal stem cell sheets fabricated by temperature-responsive cell culture plate: structural characteristics of MSC sheets. Stem Cell Res Ther 2019; 10:353. [PMID: 31779694 PMCID: PMC6883536 DOI: 10.1186/s13287-019-1431-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 09/15/2019] [Accepted: 09/30/2019] [Indexed: 12/12/2022] Open
Abstract
Background In most stem cell therapy strategies reported to date, stem cells are introduced to damaged tissue sites to repair and regenerate the original tissue structure and function. MSC therapeutic efficacies are inconsistent, largely attributed to transplanted MSC difficulties both in engrafting at tissue sites and in retaining their therapeutic functions from suspension formulations. MSC functional components, including cell adhesion and cell–cell junction proteins, and ECM that contribute to essential cellular therapeutic effects, are damaged or removed by proteolytic enzymes used in stem cell harvesting strategies from culture. To overcome these limitations, methods to harvest and transplant cells without disrupting critical stem cell functions are required. Cell sheet technology, exploiting temperature-responsive cell culture surfaces, permits cell harvest without cell protein damage. This study is focused on phenotypic traits of MSC sheets structurally and functionally to understand therapeutic benefits of cell sheets. Methods/results This study verified cleaved cellular proteins (vinculin, fibronectin, laminin, integrin β-1, and connexin 43) and increased apoptotic cell death produced under standard trypsin harvesting treatment in a time-dependent manner. However, MSC sheets produced without trypsin using only temperature-controlled sheet harvest from culture plastic exhibited intact cellular structures. Also, MSCs harvested using enzymatic treatment (i.e., chemical disruption) showed higher pYAP expression compared to MSC sheets. Conclusion Retention of cellular structures such as ECM, cell–cell junctions, and cell–ECM junctions is correlated with human umbilical cord mesenchymal stem cell (hUC-MSC) survival after detachment from cell culture surfaces. Retaining these proteins intact in MSC cultures using cell sheet technology is proposed to enhance stem cell survival and their function in stem cell-based therapy.
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Affiliation(s)
- Mitsuyoshi Nakao
- Cell Sheet Tissue Engineering Center (CSTEC), Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Health Sciences, 30 South 2000 East, Salt Lake City, UT, 84112, USA.,Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - Kyungsook Kim
- Cell Sheet Tissue Engineering Center (CSTEC), Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Health Sciences, 30 South 2000 East, Salt Lake City, UT, 84112, USA.
| | - Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - David W Grainger
- Cell Sheet Tissue Engineering Center (CSTEC), Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Health Sciences, 30 South 2000 East, Salt Lake City, UT, 84112, USA
| | - Hideko Kanazawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - Teruo Okano
- Cell Sheet Tissue Engineering Center (CSTEC), Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Health Sciences, 30 South 2000 East, Salt Lake City, UT, 84112, USA.,Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
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13
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Human mesenchymal stem cell sheets in xeno-free media for possible allogenic applications. Sci Rep 2019; 9:14415. [PMID: 31595012 PMCID: PMC6783458 DOI: 10.1038/s41598-019-50430-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 09/11/2019] [Indexed: 12/11/2022] Open
Abstract
Cell-based therapies are increasingly focused on allogeneic stem cell sources because of several advantages in eliminating donor variability (e.g., aging and disease pathophysiology) affecting stem cell quality and in cell-banked sourcing of healthy donors to enable “off-the-shelf” products. However, allogeneic cell therapy is limited by host patient immunologic competence and inconsistent performance due to cell delivery methods. To address allogeneic cell therapy limitations, this study developed a new allogeneic stem cell sheet using human umbilical cord mesenchymal stem cells (hUC-MSC) that present low antigenicity (i.e., major histocompatibility complex, MHC). Optimal conditions including cell density, passage number, and culture time were examined to fabricate reliable hUC-MSC sheets. MHC II antigens correlated to alloimmune rejection were barely expressed in hUC-MSC sheets compared to other comparator MSC sheets (hBMSC and hADSC). hUC-MSC sheets easily graft spontaneously onto subcutaneous tissue in immune-deficient mice within 10 minutes of placement. No sutures are required to secure sheets to tissue because sheet extracellular matrix (ECM) actively facilitates cell-target tissue adhesion. At 10 days post-transplantation, hUC-MSC sheets remain on ectopic target tissue sites and exhibit new blood vessel formation. Furthermore, implanted hUC-MSC sheets secrete human HGF continuously to the murine target tissue. hUC-MSC sheets described here should provide new insights for improving allogenic cell-based therapies.
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14
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Kobayashi Y, Cordonier CEJ, Noda Y, Nagase F, Enomoto J, Kageyama T, Honma H, Maruo S, Fukuda J. Tailored cell sheet engineering using microstereolithography and electrochemical cell transfer. Sci Rep 2019; 9:10415. [PMID: 31320678 PMCID: PMC6639316 DOI: 10.1038/s41598-019-46801-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 07/07/2019] [Indexed: 02/07/2023] Open
Abstract
Postoperative adhesion and occlusion remain a serious issue associated with various surgeries, including endoscopic surgery, in which proliferated fibrous tissues stick to adjacent tissues and often cause severe complications. Cell sheet engineering has emerged as an effective approach not only for cell transplantation but also for the treatment of postoperative adhesion and occlusion. However, as the tissues in the body, such as middle ear and small intestine, and typical operative sites are non-flat and spatially complicated, tailored cell sheets with three-dimensional (3D) configurations may lead to widespread use of this approach. In the present study, we used microstereolithography, biocompatible gold plating, and electrochemical cell detachment to achieve this purpose. Various objects with dimensions ranging from millimeter- to micrometer-scale were fabricated with photocurable resin using lab-made equipment for microstereolithography. To coat the fabricated objects with a thin gold layer, conventional cyanide-based gold plating was unusable because it severely damaged almost all cells. Electroless non-cyanide gold plating we prepared was cytocompatible and suitable for electrochemical cell detachment. Cell sheets on the gold-plated substrate could be directly transplanted into a mouse intraperitoneally using electrochemical cell detachment. We further demonstrated that cell sheets grown on gold-coated 3D objects were rapidly detached along with the desorption of electroactive-oligopeptide monolayer and transferred to a surrounding hydrogel. This approach may provide a promising strategy to prepare and directly transplant tailor-made cell sheets with suitable configurations.
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Affiliation(s)
- Yuka Kobayashi
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | | | - Yohei Noda
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Fuminori Nagase
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Junko Enomoto
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Tatsuto Kageyama
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Hideo Honma
- Faculty of Engineering, Kanto Gakuin University, 1162-2 Ogikubo, Odawara, 250-0022, Japan
| | - Shoji Maruo
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Junji Fukuda
- Faculty of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan.
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15
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Rosell-Garcia T, Rodriguez-Pascual F. Enhancement of collagen deposition and cross-linking by coupling lysyl oxidase with bone morphogenetic protein-1 and its application in tissue engineering. Sci Rep 2018; 8:10780. [PMID: 30018337 PMCID: PMC6050231 DOI: 10.1038/s41598-018-29236-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 07/05/2018] [Indexed: 01/07/2023] Open
Abstract
Cultured cell-derived extracellular matrices (ECM)-based biomaterials exploit the inherent capacity of cells to create highly sophisticated supramolecular assemblies. However, standard cell culture conditions are far from ideal given the fact that the diluted microenvironment does not favor the production of ECM components, a circumstance particularly relevant for collagen. An incomplete conversion of procollagen by C-proteinase/bone morphogenetic protein 1 (BMP1) has been proposed to severely limit in vitro collagen deposition. BMP1 also catalyzes the proteolytic activation of the precursor of the collagen cross-linking enzyme, lysyl oxidase (LOX) to yield the active form, suggesting a deficit in cross-linking activity under standard conditions. We hypothesized that the implementation of fibroblast cultures with LOX and BMP1 may be an effective way to increase collagen deposition. To test it, we have generated stable cell lines overexpressing LOX and BMP1 and studied the effect of supernatants enriched in LOX and BMP1 on collagen synthesis and deposition from fibroblasts. Herein, we demonstrate that the supplementation with LOX and BMP1 strongly increased the deposition of collagen onto the insoluble matrix at the expense of the soluble fraction in the extracellular medium. Using decellularization protocols, we also show that fibroblast-derived matrices regulate adipogenic and osteogenic differentiation of human mesenchymal stem cells (MSC), and this effect was modulated by LOX/BMP1. Collectively, these data demonstrate that we have developed a convenient protocol to enhance the capacity of in vitro cell cultures to deposit collagen in the ECM, representing this approach a promising technology for application in tissue engineering.
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Affiliation(s)
- T Rosell-Garcia
- Centro de Biología Molecular "Severo Ochoa" Consejo Superior de Investigaciones Científicas (C.S.I.C.)/Universidad Autónoma de Madrid (Madrid), Madrid, Spain
| | - F Rodriguez-Pascual
- Centro de Biología Molecular "Severo Ochoa" Consejo Superior de Investigaciones Científicas (C.S.I.C.)/Universidad Autónoma de Madrid (Madrid), Madrid, Spain.
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