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Scott BB, Wang Y, Wu RC, Randolph MA, Redmond RW. Light-activated photosealing with human amniotic membrane strengthens bowel anastomosis in a hypotensive, trauma-relevant swine model. Lasers Surg Med 2022; 54:407-417. [PMID: 34664720 DOI: 10.1002/lsm.23485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 09/27/2021] [Accepted: 10/04/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND Gastrointestinal anastomotic leakage is a dreaded complication despite advancements in surgical technique. Photochemical tissue bonding (PTB) is a method of sealing tissue surfaces utilizing photoactive dye. We evaluated if crosslinked human amniotic membrane (xHAM) photosealed over the enteroenterostomy would augment anastomotic strength in a trauma-relevant swine hemorrhagic shock model. METHODS Yorkshire swine (40-45 kg, n = 14) underwent midline laparotomy and sharp transection of the small intestine 120 cm proximal to the ileocecal fold. Immediately following intestinal transection, a controlled arterial bleed was performed to reach hemorrhagic shock. Intestinal repair was performed after 60 minutes and autotransfusion of the withdrawn blood was performed for resuscitation. Animals were randomized to small intestinal anastomosis by one of the following methods (seven per group): suture repair (SR), or SR with PTB augmentation. Animals were euthanized at postoperative Day 28 and burst pressure (BP) strength testing was performed on all excised specimens. RESULTS Mean BP for SR, PTB, and native tissue groups were 229 ± 40, 282 ± 21, and 282 ± 47 mmHg, respectively, with the SR group statistically significantly different on analysis of variance (p = 0.02). Post-hoc Tukey all-pairs comparison demonstrated a statistically significant difference in burst pressure strength between the SR only and the PTB group (p = 0.04). All specimens in SR group ruptured at the anastomosis upon burst pressure testing, while all specimens in the PTB group ruptured at least 2.5 cm from the anastomosis. CONCLUSION Photosealing with xHAM significantly augments the strength of small intestinal anastomosis performed in a trauma porcine model.
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Affiliation(s)
- Benjamin B Scott
- Wellman Center for Photomedicine, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, USA
- Plastic Surgery Research Laboratory, Department of Surgery, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Ying Wang
- Wellman Center for Photomedicine, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Ruby C Wu
- Wellman Center for Photomedicine, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Mark A Randolph
- Plastic Surgery Research Laboratory, Department of Surgery, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Robert W Redmond
- Wellman Center for Photomedicine, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, USA
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Biomaterials and Adipose-Derived Mesenchymal Stem Cells for Regenerative Medicine: A Systematic Review. MATERIALS 2021; 14:ma14164641. [PMID: 34443163 PMCID: PMC8400778 DOI: 10.3390/ma14164641] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/02/2021] [Accepted: 08/11/2021] [Indexed: 12/19/2022]
Abstract
The use of biological templates for the suitable growth of adipose-derived mesenchymal stem cells (AD-MSC) and “neo-tissue” construction has exponentially increased over the last years. The bioengineered scaffolds still have a prominent and biocompatible framework playing a role in tissue regeneration. In order to supply AD-MSCs, biomaterials, as the stem cell niche, are more often supplemented by or stimulate molecular signals that allow differentiation events into several strains, besides their secretion of cytokines and effects of immunomodulation. This systematic review aims to highlight the details of the integration of several types of biomaterials used in association with AD-MSCs, collecting notorious and basic data of in vitro and in vivo assays, taking into account the relevance of the interference of the cell lineage origin and handling cell line protocols for both the replacement and repairing of damaged tissues or organs in clinical application. Our group analyzed the quality and results of the 98 articles selected from PubMed, Scopus and Web of Science. A total of 97% of the articles retrieved demonstrated the potential in clinical applications. The synthetic polymers were the most used biomaterials associated with AD-MSCs and almost half of the selected articles were applied on bone regeneration.
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Bilal M, Nunes LV, Duarte MTS, Ferreira LFR, Soriano RN, Iqbal HMN. Exploitation of Marine-Derived Robust Biological Molecules to Manage Inflammatory Bowel Disease. Mar Drugs 2021; 19:md19040196. [PMID: 33808253 PMCID: PMC8067156 DOI: 10.3390/md19040196] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 03/24/2021] [Accepted: 03/26/2021] [Indexed: 02/05/2023] Open
Abstract
Naturally occurring biological entities with extractable and tunable structural and functional characteristics, along with therapeutic attributes, are of supreme interest for strengthening the twenty-first-century biomedical settings. Irrespective of ongoing technological and clinical advancement, traditional medicinal practices to address and manage inflammatory bowel disease (IBD) are inefficient and the effect of the administered therapeutic cues is limited. The reasonable immune response or invasion should also be circumvented for successful clinical translation of engineered cues as highly efficient and robust bioactive entities. In this context, research is underway worldwide, and researchers have redirected or regained their interests in valorizing the naturally occurring biological entities/resources, for example, algal biome so-called "treasure of untouched or underexploited sources". Algal biome from the marine environment is an immense source of excellence that has also been demonstrated as a source of bioactive compounds with unique chemical, structural, and functional features. Moreover, the molecular modeling and synthesis of new drugs based on marine-derived therapeutic and biological cues can show greater efficacy and specificity for the therapeutics. Herein, an effort has been made to cover the existing literature gap on the exploitation of naturally occurring biological entities/resources to address and efficiently manage IBD. Following a brief background study, a focus was given to design characteristics, performance evaluation of engineered cues, and point-of-care IBD therapeutics of diverse bioactive compounds from the algal biome. Noteworthy potentialities of marine-derived biologically active compounds have also been spotlighted to underlying the impact role of bio-active elements with the related pathways. The current review is also focused on the applied standpoint and clinical translation of marine-derived bioactive compounds. Furthermore, a detailed overview of clinical applications and future perspectives are also given in this review.
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Affiliation(s)
- Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian 223003, China
- Correspondence: or (M.B.); (H.M.N.I.)
| | - Leonardo Vieira Nunes
- Department of Medicine, Federal University of Juiz de Fora, Juiz de Fora-MG 36036-900, Brazil;
| | | | - Luiz Fernando Romanholo Ferreira
- Graduate Program in Process Engineering, Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, Aracaju-Sergipe 49032-490, Brazil;
- Institute of Technology and Research (ITP), Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, Aracaju-Sergipe 49032-490, Brazil
| | - Renato Nery Soriano
- Division of Physiology and Biophysics, Department of Basic Life Sciences, Federal University of Juiz de Fora, Governador Valadares-MG 35010-180, Brazil;
| | - Hafiz M. N. Iqbal
- School of Engineering and Sciences, Tecnologico de Monterrey, Monterrey 64849, Mexico
- Correspondence: or (M.B.); (H.M.N.I.)
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Aydin A, Cebi G, Demirtas ZE, Erkus H, Kucukay A, Ok M, Sakalli L, Alpdagtas S, Gunduz O, Ustundag CB. Combating COVID-19 with tissue engineering: a review. EMERGENT MATERIALS 2021; 4:329-349. [PMID: 33235976 PMCID: PMC7677604 DOI: 10.1007/s42247-020-00138-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 11/02/2020] [Indexed: 05/04/2023]
Abstract
The ongoing COVID-19 pandemic triggered by SARS-CoV-2 emerged from Wuhan, China, firstly in December 2019, as well spread to almost all around the world rapidly. The main reason why this disease spreads so many people in a short time is that the virus could be transmitted from an infected person to another by infected droplets. The new emergence of diseases usually may affect multiple organs; moreover, this disease is such an example. Numerous reported studies focus on acute or chronic organ damage caused by the virus. At this point, tissue engineering (TE) strategies can be used to treat the damages with its interdisciplinary approaches. Tissue engineers could design drug delivery systems, scaffolds, and especially biomaterials for the damaged tissue and organs. In this review, brief information about SARS-CoV-2, COVID-19, and epidemiology of the disease will be given at first. After that, the symptoms, the tissue damages in specific organs, and cytokine effect caused by COVID-19 will be described in detail. Finally, it will be attempted to summarize and suggest the appropriate treatments with suitable biomaterials for the damages via TE approaches. The aim of this review is to serve as a summary of currently available tissue damage treatments after COVID-19.
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Affiliation(s)
- Ayca Aydin
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, 34210 Istanbul, Turkey
| | - Gizem Cebi
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, 34210 Istanbul, Turkey
| | - Zeynep Ezgi Demirtas
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, 34210 Istanbul, Turkey
| | - Huseyin Erkus
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, 34210 Istanbul, Turkey
| | - Aleyna Kucukay
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, 34210 Istanbul, Turkey
| | - Merve Ok
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, 34210 Istanbul, Turkey
| | - Latife Sakalli
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, 34210 Istanbul, Turkey
| | - Saadet Alpdagtas
- Department of Biology, Van Yuzuncu Yil University, 65080 Van, Turkey
| | - Oguzhan Gunduz
- Center for Nanotechnology and Biomaterials Application and Research (NBUAM), Marmara University, 34722 Istanbul, Turkey
- Department of Metallurgical and Materials Engineering, Faculty of Technology, Marmara University, 34722 Istanbul, Turkey
| | - Cem Bulent Ustundag
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, 34210 Istanbul, Turkey
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Kajbafzadeh AM, Fendereski K, Khorramirouz R, Daryabari SS, Masoomi A, Moosavi S, Ataei M, Arshadi H. In vivo application of decellularized rat colon and evaluation of the engineered scaffolds following 9 months of follow-up. Cell Biol Int 2020; 44:2253-2262. [PMID: 32716102 DOI: 10.1002/cbin.11433] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 07/22/2020] [Accepted: 07/25/2020] [Indexed: 12/14/2022]
Abstract
The aim of this study was to investigate the rat small intestine mesentery and colon as natural bio-reactors for rat colon-derived scaffolds. We decellularized eight whole rat colons by a perfusion-based protocol using 0.1% sodium dodecyl sulfate for 24 hr. The provided bio-scaffolds were examined by histological staining, scanning electron microscopy, and collagen and sulfated glycosaminoglycan quantification. Subsequently, we implanted 4 cm segments of the provided bio-scaffolds into two groups of animal models comprising tissue grafting into the mesenteric tissue (n: 10) and end-to-end anastomosis (n: 10) to the colon of host rats. Following 9 months of follow-up, we harvested the grafts and performed histological and immunohistochemical studies as well as real-time PCR evaluation for telomerase activity of the samples. Histological staining, scanning electron microscopy and protein content evaluation of the acellular tissues confirmed the complete removal of the cellular components and preservation of the extracellular matrix. Histopathological assessment of the implanted scaffolds was suggestive of a regenerative process in both groups. Moreover, immunohistochemical analysis of the samples confirmed the presence of smooth muscle cells, endothelial progenitor cells, and neural elements in both groups of grafted scaffolds. Our data confirmed the recellularization of the acellular colon grafts in both groups after 9 months of follow up. Also, the implanted tissues demonstrated different characteristics based on their implantation location. The outcomes of this investigation illustrate the capability of acellular tissues for in vivo application and regeneration.
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Affiliation(s)
- Abdol-Mohammad Kajbafzadeh
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Kiarad Fendereski
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Khorramirouz
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyedeh Sima Daryabari
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmad Masoomi
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Shirin Moosavi
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahba Ataei
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid Arshadi
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
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Gao K, He S, Kumar P, Farmer D, Zhou J, Wang A. Clonal isolation of endothelial colony-forming cells from early gestation chorionic villi of human placenta for fetal tissue regeneration. World J Stem Cells 2020; 12:123-138. [PMID: 32184937 PMCID: PMC7062038 DOI: 10.4252/wjsc.v12.i2.123] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 12/03/2019] [Accepted: 12/23/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Endothelial colony-forming cells (ECFCs) have been implicated in the process of vascularization, which includes vasculogenesis and angiogenesis. Vasculogenesis is a de novo formation of blood vessels, and is an essential physiological process that occurs during embryonic development and tissue regeneration. Angiogenesis is the growth of new capillaries from pre-existing blood vessels, which is observed both prenatally and postnatally. The placenta is an organ composed of a variety of fetal-derived cells, including ECFCs, and therefore has significant potential as a source of fetal ECFCs for tissue engineering.
AIM To investigate the possibility of isolating clonal ECFCs from human early gestation chorionic villi (CV-ECFCs) of the placenta, and assess their potential for tissue engineering.
METHODS The early gestation chorionic villus tissue was dissociated by enzyme digestion. Cells expressing CD31 were selected using magnetic-activated cell sorting, and plated in endothelial-specific growth medium. After 2-3 wks in culture, colonies displaying cobblestone-like morphology were manually picked using cloning cylinders. We characterized CV-ECFCs by flow cytometry, immunophenotyping, tube formation assay, and Dil-Ac-LDL uptake assay. Viral transduction of CV-ECFCs was performed using a Luciferase/tdTomato-containing lentiviral vector, and transduction efficiency was tested by fluorescent microscopy and flow cytometry. Compatibility of CV-ECFCs with a delivery vehicle was determined using an FDA approved, small intestinal submucosa extracellular matrix scaffold.
RESULTS After four passages in 6-8 wks of culture, we obtained a total number of 1.8 × 107 CV-ECFCs using 100 mg of early gestational chorionic villus tissue. Immunophenotypic analyses by flow cytometry demonstrated that CV-ECFCs highly expressed the endothelial markers CD31, CD144, CD146, CD105, CD309, only partially expressed CD34, and did not express CD45 and CD90. CV-ECFCs were capable of acetylated low-density lipoprotein uptake and tube formation, similar to cord blood-derived ECFCs (CB-ECFCs). CV-ECFCs can be transduced with a Luciferase/tdTomato-containing lentiviral vector at a transduction efficiency of 85.1%. Seeding CV-ECFCs on a small intestinal submucosa extracellular matrix scaffold confirmed that CV-ECFCs were compatible with the biomaterial scaffold.
CONCLUSION In summary, we established a magnetic sorting-assisted clonal isolation approach to derive CV-ECFCs. A substantial number of CV-ECFCs can be obtained within a short time frame, representing a promising novel source of ECFCs for fetal treatments.
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Affiliation(s)
- Kewa Gao
- Department of Burns and Plastic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, Hunan Province, China
- Surgical Bioengineering Laboratory, Department of Surgery, University of California Davis, Sacramento, CA 95817, United States
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, Sacramento, CA 95817, United States
| | - Siqi He
- Department of Burns and Plastic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, Hunan Province, China
- Surgical Bioengineering Laboratory, Department of Surgery, University of California Davis, Sacramento, CA 95817, United States
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, Sacramento, CA 95817, United States
| | - Priyadarsini Kumar
- Surgical Bioengineering Laboratory, Department of Surgery, University of California Davis, Sacramento, CA 95817, United States
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, Sacramento, CA 95817, United States
| | - Diana Farmer
- Surgical Bioengineering Laboratory, Department of Surgery, University of California Davis, Sacramento, CA 95817, United States
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, Sacramento, CA 95817, United States
| | - Jianda Zhou
- Department of Burns and Plastic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, Hunan Province, China
| | - Aijun Wang
- Surgical Bioengineering Laboratory, Department of Surgery, University of California Davis, Sacramento, CA 95817, United States
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, Sacramento, CA 95817, United States
- Department of Biomedical Engineering, University of California Davis, Davis, CA 95817, United States
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Zakhem E, Raghavan S, Suhar RA, Bitar KN. Bioengineering and regeneration of gastrointestinal tissue: where are we now and what comes next? Expert Opin Biol Ther 2019; 19:527-537. [PMID: 30880502 DOI: 10.1080/14712598.2019.1595579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
INTRODUCTION The field of tissue engineering and regenerative medicine has been applied to the gastrointestinal (GI) tract for a couple decades. Several achievements have been accomplished that provide promising tools for treating diseases of the GI tract. AREAS COVERED The work described in this review covers the traditional aspect of using cells and scaffolds to replace parts of the tract. Several studies investigated different types of biomaterials and different types of cells. A more recent approach involved the use of gut-derived organoid units that can differentiate into all gut cell layers. The most recent approach introduced the use of organ-on-a-chip concept to understand the physiology and pathophysiology of the GI system. EXPERT OPINION The different approaches tackle the diseases of the GI tract from different perspectives. While all these different approaches provide a promising and encouraging future for this field, the translational aspect is yet to be studied.
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Affiliation(s)
- Elie Zakhem
- a Wake Forest Institute for Regenerative Medicine , Wake Forest School of Medicine , Winston Salem , NC , USA.,b Section on Gastroenterology , Wake Forest School of Medicine , Winston Salem , NC , USA
| | - Shreya Raghavan
- c Department of Materials Science and Engineering , University of Michigan , Ann Arbor , MI , USA
| | - Riley A Suhar
- d Department of Materials Science and Engineering , Stanford University , Stanford , CA , USA
| | - Khalil N Bitar
- a Wake Forest Institute for Regenerative Medicine , Wake Forest School of Medicine , Winston Salem , NC , USA.,b Section on Gastroenterology , Wake Forest School of Medicine , Winston Salem , NC , USA.,e Virginia Tech-Wake Forest School of Biomedical Engineering Sciences , Winston-Salem , NC , USA
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Martin LY, Ladd MR, Werts A, Sodhi CP, March JC, Hackam DJ. Tissue engineering for the treatment of short bowel syndrome in children. Pediatr Res 2018; 83:249-257. [PMID: 28937976 PMCID: PMC6002962 DOI: 10.1038/pr.2017.234] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 09/07/2017] [Indexed: 12/11/2022]
Abstract
Short bowel syndrome is a major cause of morbidity and mortality in children. Despite decades of experience in the management of short bowel syndrome, current therapy is primarily supportive. Definitive treatment often requires intestinal transplantation, which is associated with significant morbidity and mortality. In order to develop novel approaches to the treatment of short bowel syndrome, we and others have focused on the development of an artificial intestine, by placing intestinal stem cells on a bioscaffold that has an absorptive surface resembling native intestine, and taking advantage of neovascularization to develop a blood supply. This review will explore recent advances in biomaterials, vascularization, and progress toward development of a functional epithelium and mesenchymal niche, highlighting both success and ongoing challenges in the field.
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Affiliation(s)
- Laura Y. Martin
- Division of General Pediatric Surgery, Johns Hopkins Children's Center, Baltimore MD 21287
- Department of Surgery, Johns Hopkins University and Johns Hopkins children's Center, Baltimore MD 21287
| | - Mitchell R. Ladd
- Division of General Pediatric Surgery, Johns Hopkins Children's Center, Baltimore MD 21287
- Department of Surgery, Johns Hopkins University and Johns Hopkins children's Center, Baltimore MD 21287
| | - Adam Werts
- Division of General Pediatric Surgery, Johns Hopkins Children's Center, Baltimore MD 21287
- Department of Surgery, Johns Hopkins University and Johns Hopkins children's Center, Baltimore MD 21287
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University and Johns Hopkins children's Center, Baltimore MD 21287
| | - Chhinder P. Sodhi
- Division of General Pediatric Surgery, Johns Hopkins Children's Center, Baltimore MD 21287
- Department of Surgery, Johns Hopkins University and Johns Hopkins children's Center, Baltimore MD 21287
| | - John C. March
- Department of Biomedical Engineering, Cornell University, Ithica, NY
| | - David J. Hackam
- Division of General Pediatric Surgery, Johns Hopkins Children's Center, Baltimore MD 21287
- Department of Surgery, Johns Hopkins University and Johns Hopkins children's Center, Baltimore MD 21287
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Colorectal wall regeneration resulting from the association of chitosan hydrogel and stromal vascular fraction from adipose tissue. J Biomed Mater Res A 2017; 106:460-467. [DOI: 10.1002/jbm.a.36243] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Revised: 06/28/2017] [Accepted: 09/19/2017] [Indexed: 12/13/2022]
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Zakhem E, Tamburrini R, Orlando G, Koch KL, Bitar KN. Transplantation of a Human Tissue-Engineered Bowel in an Athymic Rat Model. Tissue Eng Part C Methods 2017; 23:652-660. [PMID: 28653858 DOI: 10.1089/ten.tec.2017.0113] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Intestinal failure is a serious clinical condition characterized by loss of motility, absorptive function, and malnutrition. Current treatments do not provide the optimal solution for patients due to the numerous resulting complications. A bioengineered bowel that contains the necessary cellular components provides a viable option for patients. In this study, human tissue-engineered bowel (hTEB) was developed using a technique, whereby human-sourced smooth muscle cells were aligned and neoinnervated using human-sourced neural progenitor cells, resulting in the formation of intrinsically innervated smooth muscle sheets. The sheets were then rolled around hollow tubular chitosan scaffolds and implanted in the omentum of athymic rats for neovascularization. Four weeks later, biopsies of hTEB showed vascularization, normal cell alignment, phenotype, and function. During the biopsy procedure, hTEB was transplanted into the same rat's native intestine. The rats gained weight and 6 weeks later, hTEB was harvested for studies. hTEB was healthy in color with normal diameter and with digested food in the lumen, indicating propulsion of luminal content through the hTEB. Histological studies indicated neomucosa with evidence of crypts and villi structures. This study provides proof of concept that hTEB could provide a viable treatment to lengthen the gut for patients with gastrointestinal disorders.
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Affiliation(s)
- Elie Zakhem
- 1 Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine , Winston Salem, North Carolina.,2 Program in Neuro-Gastroenterology and Motility, Wake Forest School of Medicine , Winston Salem, North Carolina
| | - Riccardo Tamburrini
- 3 Department of Surgery, Wake Forest School of Medicine , Winston Salem, North Carolina.,4 Department of General Surgery, PhD program in Experimental Medicine, University of Pavia , Pavia, Italy
| | - Giuseppe Orlando
- 3 Department of Surgery, Wake Forest School of Medicine , Winston Salem, North Carolina
| | - Kenneth L Koch
- 2 Program in Neuro-Gastroenterology and Motility, Wake Forest School of Medicine , Winston Salem, North Carolina.,5 Section on Gastroenterology, Wake Forest School of Medicine , Winston Salem, North Carolina
| | - Khalil N Bitar
- 1 Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine , Winston Salem, North Carolina.,2 Program in Neuro-Gastroenterology and Motility, Wake Forest School of Medicine , Winston Salem, North Carolina.,5 Section on Gastroenterology, Wake Forest School of Medicine , Winston Salem, North Carolina.,6 Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Wake Forest School of Medicine , Winston Salem, North Carolina
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Versatility of Chitosan-Based Biomaterials and Their Use as Scaffolds for Tissue Regeneration. ScientificWorldJournal 2017; 2017:8639898. [PMID: 28567441 PMCID: PMC5439263 DOI: 10.1155/2017/8639898] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 03/10/2017] [Accepted: 04/03/2017] [Indexed: 01/05/2023] Open
Abstract
Chitosan is a naturally occurring polysaccharide obtained from chitin, present in abundance in the exoskeletons of crustaceans and insects. It has aroused great interest as a biomaterial for tissue engineering on account of its biocompatibility and biodegradation and its affinity for biomolecules. A significant number of research groups have investigated the application of chitosan as scaffolds for tissue regeneration. However, there is a wide variability in terms of physicochemical characteristics of chitosan used in some studies and its combinations with other biomaterials, making it difficult to compare results and standardize its properties. The current systematic review of literature on the use of chitosan for tissue regeneration consisted of a study of 478 articles in the PubMed database, which resulted, after applying inclusion criteria, in the selection of 61 catalogued, critically analysed works. The results demonstrated the effectiveness of chitosan-based biomaterials in 93.4% of the studies reviewed, whether or not combined with cells and growth factors, in the regeneration of various types of tissues in animals. However, the absence of clinical studies in humans, the inadequate experimental designs, and the lack of information concerning chitosan's characteristics limit the reproducibility and relevance of studies and the clinical applicability of chitosan.
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Fang J, Wei Y, Lv C, Peng S, Zhao S, Hua J. CD61 promotes the differentiation of canine ADMSCs into PGC-like cells through modulation of TGF-β signaling. Sci Rep 2017; 7:43851. [PMID: 28256590 PMCID: PMC5335555 DOI: 10.1038/srep43851] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 01/30/2017] [Indexed: 12/18/2022] Open
Abstract
Previous studies have shown that CD61 (integrin-β3) promotes the differentiation of human umbilical cord mesenchymal stem cells (hUC-MSCs) into germ-like cells. However, the mechanism remains unclear. In this study, we showed that overexpression of CD61 in canine adipose-derived mesenchymal stem cells (cADMSCs) promotes their differentiation into primordial germ cell (PGC)-like cells. Quantitative real-time PCR, immunocytochemistry and western blot detected higher levels of PGC-specific markers in CD61-overexpressed cADMSCs compared with those in control cells. Moreover, phosphorylation of Smad2, a downstream mediator of transforming growth factor beta (TGF-β), was increased in CD61-overexpressed cADMSCs than that in control cells. However, the expression of PGC-specific markers was downregulated in cADMSCs treated with a TGF-β inhibitor. These results suggested that CD61 could induce cADMSCs to differentiate into PGC-like cells by relying on the activation of TGF-β pathway. ADMSCs possess a considerable potential in treating the infertility of rare animal species.
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Affiliation(s)
- Jia Fang
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering &Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yudong Wei
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering &Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Changrong Lv
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering &Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Sha Peng
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering &Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Shanting Zhao
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering &Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jinlian Hua
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering &Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
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Zakhem E, El Bahrawy M, Orlando G, Bitar KN. Biomechanical properties of an implanted engineered tubular gut-sphincter complex. J Tissue Eng Regen Med 2016; 11:3398-3407. [PMID: 27882697 DOI: 10.1002/term.2253] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 04/13/2016] [Accepted: 07/03/2016] [Indexed: 12/26/2022]
Abstract
Neuromuscular diseases of the gut alter the normal motility patterns. Although surgical intervention remains the standard treatment, preservation of the sphincter attached to the rest of the gut is challenging. The present study aimed to evaluate a bioengineered gut-sphincter complex following its subcutaneous implantation for 4 weeks in rats. Engineered innervated human smooth muscle sheets and innervated human sphincters with a predefined alignment were placed around tubular scaffolds to create a gut-sphincter complex. The engineered complex was subcutaneously implanted in the abdomen of the rats for 4 weeks. The implanted tissues were vascularized. In vivo manometry revealed luminal pressure at the gut and the sphincter zone. Tensile strength, elongation at break and Young's modulus of the engineered complexes were similar to those of native rat intestine. Histological and immunofluorescence assays showed maintenance of smooth muscle circular alignment in the engineered tissue, maintenance of smooth muscle contractile phenotype and innervation of the smooth muscle. Electrical field stimulation induced relaxation of the smooth muscle of both the sphincter and the gut parts. Relaxation was partly inhibited by nitric oxide inhibitor indicating nitrergic contribution to relaxation. The present study has demonstrated for the first time a successfully developed and subcutaneously implanted a tubular human-derived gut-sphincter complex. The sphincteric part of Tubular Gut-Sphincter Complex (TGSC) maintained the basal tone characteristic of a native sphincter. The gut part also maintained its specific neuromuscular characteristics. The results of this study provide a promising therapeutic approach to restore gut continuity and motility. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Elie Zakhem
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston Salem, NC, USA.,Department of Molecular Medicine and Translational Sciences, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Mostafa El Bahrawy
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Giuseppe Orlando
- Department of General Surgery, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Khalil N Bitar
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston Salem, NC, USA.,Department of Molecular Medicine and Translational Sciences, Wake Forest School of Medicine, Winston Salem, NC, USA.,Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Winston Salem, NC, USA
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15
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Abstract
Functions of the gastrointestinal tract include motility, digestion and absorption of nutrients. These functions are mediated by several specialized cell types including smooth muscle cells, neurons, interstitial cells and epithelial cells. In gastrointestinal diseases, some of the cells become degenerated or fail to accomplish their normal functions. Surgical resection of the diseased segments of the gastrointestinal tract is considered the gold-standard treatment in many cases, but patients might have surgical complications and quality of life can remain low. Tissue engineering and regenerative medicine aim to restore, repair, or regenerate the function of the tissues. Gastrointestinal tissue engineering is a challenging process given the specific phenotype and alignment of each cell type that colonizes the tract - these properties are critical for proper functionality. In this Review, we summarize advances in the field of gastrointestinal tissue engineering and regenerative medicine. Although the findings are promising, additional studies and optimizations are needed for translational purposes.
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Affiliation(s)
- Khalil N Bitar
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, 391 Technology Way NE, Winston Salem, North Carolina 27101, USA.,Department of Molecular Medicine and Translational Sciences, Wake Forest School of Medicine, 1 Medical Center Blvd, Winston Salem, North Carolina 27157, USA.,Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, 391 Technology Way NE, Winston Salem, North Carolina 27101, USA
| | - Elie Zakhem
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, 391 Technology Way NE, Winston Salem, North Carolina 27101, USA.,Department of Molecular Medicine and Translational Sciences, Wake Forest School of Medicine, 1 Medical Center Blvd, Winston Salem, North Carolina 27157, USA
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