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Liu Y, Zheng K, Meng Z, Wang L, Liu X, Guo B, He J, Tang X, Liu M, Ma N, Li X, Zhao J. A cell-free tissue-engineered tracheal substitute with sequential cytokine release maintained airway opening in a rabbit tracheal full circumferential defect model. Biomaterials 2023; 300:122208. [PMID: 37352607 DOI: 10.1016/j.biomaterials.2023.122208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 05/21/2023] [Accepted: 06/12/2023] [Indexed: 06/25/2023]
Abstract
In this study, a cell-free tissue-engineered tracheal substitute was developed, which is based on a 3D-printed polycaprolactone scaffold coated with a gelatin-methacryloyl (GelMA) hydrogel, with transforming growth factor-β1 (TGF-β) and stromal cell-derived factor-1α (SDF-1) sequentially embedded, to facilitate cell recruitment and differentiation toward chondrocyte-phenotype. TGF-β was loaded onto polydopamine particles, and then encapsulated into the GelMA together with SDF-1, and called G/S/P@T, which was used to coat 3D-printed PCL scaffold to form the tracheal substitute. A rapid release of SDF-1 was observed during the first week, followed by a slow and sustained release of TGF-β for approximately four weeks. The tracheal substitute significantly promoted the recruitment of mesenchymal stromal cells (MSCs) or human bronchial epithelial cells in vitro, and enhanced the ability of MSCs to differentiate towards chondrocyte phenotype. Implantation of the tissue-engineered tracheal substitute with a rabbit tracheal anterior defect model improved regeneration of airway epithelium, recruitment of endogenous MSCs and expression of markers of chondrocytes at the tracheal defect site. Moreover, the tracheal substitute maintained airway opening for 4 weeks in a tracheal full circumferential defect model with airway epithelium coverage at the defect sites without granulation tissue accumulation in the tracheal lumen or underneath. The promising results suggest that this simple, cell-free tissue-engineered tracheal substitute can be used directly after tracheal defect removal and should be further developed towards clinical application.
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Affiliation(s)
- Yujian Liu
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, Shaanxi, 710038, China; Department of Cardiothoracic Surgery, Central Theater Command General Hospital of Chinese People's Liberation Army, Wuhan, Hubei, 430070, China
| | - Kaifu Zheng
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, Shaanxi, 710038, China; Department of General Surgery, The 991st Hospital of the Chinese People's Liberation Army Joint Logistic Support Force, Xiangyang, Hubei, 441000, China
| | - Zijie Meng
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
| | - Lei Wang
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, Shaanxi, 710038, China
| | - Xi Liu
- Department of Cardiothoracic Surgery, The 980th Hospital of the Chinese People's Liberation Army Joint Logistic Support Force, Shijiazhuang, Hebei, 052460, China
| | - Baolin Guo
- State Key Laboratory for Mechanical Behavior of Materials, And Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
| | - Jiankang He
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
| | - Xiyang Tang
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, Shaanxi, 710038, China
| | - Mingyao Liu
- Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Latner Thoracic Surgery Research Laboratories, Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Nan Ma
- Department of Ophthalmology, Tangdu Hospital, Air Force Medical University, Xi'an, Shaanxi, 710038, China.
| | - Xiaofei Li
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, Shaanxi, 710038, China.
| | - Jinbo Zhao
- Department of Thoracic Surgery, Tangdu Hospital, Air Force Medical University, Xi'an, Shaanxi, 710038, China.
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Wade H, Pan K, Duan Q, Kaluzny S, Pandey E, Fatumoju L, Saraswathi V, Wu R, Harris EN, Su Q. Akkermansia muciniphila and its membrane protein ameliorates intestinal inflammatory stress and promotes epithelial wound healing via CREBH and miR-143/145. J Biomed Sci 2023; 30:38. [PMID: 37287024 DOI: 10.1186/s12929-023-00935-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 05/30/2023] [Indexed: 06/09/2023] Open
Abstract
BACKGROUND The intestinal epithelial barrier is the interface for interaction between gut microbiota and host metabolic systems. Akkermansia muciniphila (A. muciniphila) is a key player in the colonic microbiota that resides in the mucus layer, whose abundance is selectively decreased in the faecal microbiota of inflammatory bowel disease (IBD) patients. This study aims to investigate the regulatory mechanism among A. muciniphila, a transcription factor cAMP-responsive element-binding protein H (CREBH), and microRNA-143/145 (miR-143/145) in intestinal inflammatory stress, gut barrier integrity and epithelial regeneration. METHODS A novel mouse model with increased colonization of A muciniphila in the intestine of CREBH knockout mice, an epithelial wound healing assay and several molecular biological techniques were applied in this study. Results were analysed using a homoscedastic 2-tailed t-test. RESULTS Increased colonization of A. muciniphila in mouse gut enhanced expression of intestinal CREBH, which was associated with the mitigation of intestinal endoplasmic reticulum (ER) stress, gut barrier leakage and blood endotoxemia induced by dextran sulfate sodium (DSS). Genetic depletion of CREBH (CREBH-KO) significantly inhibited the expression of tight junction proteins that are associated with gut barrier integrity, including Claudin5 and Claudin8, but upregulated Claudin2, a tight junction protein that enhances gut permeability, resulting in intestinal hyperpermeability and inflammation. Upregulation of CREBH by A. muciniphila further coupled with miR-143/145 promoted intestinal epithelial cell (IEC) regeneration and wound repair via insulin-like growth factor (IGF) and IGFBP5 signalling. Moreover, the gene expressing an outer membrane protein of A. muciniphila, Amuc_1100, was cloned into a mammalian cell-expression vector and successfully expressed in porcine and human IECs. Expression of Amuc_1100 in IECs could recapitulate the health beneficial effect of A. muciniphila on the gut by activating CREBH, inhibiting ER stress and enhancing the expression of genes involved in gut barrier integrity and IEC's regeneration. CONCLUSIONS This study uncovers a novel mechanism that links A. muciniphila and its membrane protein with host CREBH, IGF signalling and miRNAs in mitigating intestinal inflammatory stress-gut barrier permeability and promoting intestinal wound healing. This novel finding may lend support to the development of therapeutic approaches for IBD by manipulating the interaction between host genes, gut bacteria and its bioactive components.
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Affiliation(s)
- Henry Wade
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, BT9 5DL, UK
| | - Kaichao Pan
- Department of Medicine, Section of Cardiology, University of Chicago, Chicago, USA
| | - Qihua Duan
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, BT9 5DL, UK
| | - Szczepan Kaluzny
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, BT9 5DL, UK
| | - Ekta Pandey
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - Linda Fatumoju
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | | | - Rongxue Wu
- Department of Medicine, Section of Cardiology, University of Chicago, Chicago, USA
| | - Edward N Harris
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - Qiaozhu Su
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, BT9 5DL, UK.
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Tian J, Li Y, Bao X, Yang F, Tang X, Jiang Q, Yin Y, Yao K. Early weaning causes small intestinal atrophy by inhibiting the activity of intestinal stem cells: involvement of Wnt/β-catenin signaling. Stem Cell Res Ther 2023; 14:65. [PMID: 37020258 PMCID: PMC10077674 DOI: 10.1186/s13287-023-03293-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 03/17/2023] [Indexed: 04/07/2023] Open
Abstract
BACKGROUND Early weaning and shorter breastfeeding duration are applied by a proportion of young mothers, especially in the social spheres of poverty-stricken areas. Early childhood is a critical period for intestinal development, which is driven by intestinal stem cells (ISCs). However, how early weaning practice affects the function of ISCs to mediate intestinal development remains unclear. METHODS We established an excellent early weaning mice model that has significant intestinal atrophy and growth arrest symptoms to explore the responses of ISCs to early weaning. The primary and passaged intestinal organoids from the suckling or early weaning mice were cultured to explore the underlying mechanism of early weaning affecting the ISCs. RESULTS Early weaning depressed the self-renewal of ISCs and attenuated the activity of ISCs-driven intestinal epithelial regeneration and crypt expansion in vivo and ex-vivo. Further results showed that early weaning retarded the differentiation of ISCs into transit-amplifying cells and Paneth cells, and accelerated the apoptosis of villous epithelial cells, jointly leading to intestinal epithelial atrophy. Mechanistically, early weaning inhibited Wnt signaling in ISCs, while an exogenous Wnt amplifier restored ISCs' function in ex-vivo. CONCLUSION Our findings indicate that early weaning depresses the activity of ISCs via attenuating Wnt/β-catenin signaling and triggers the proinflammatory cytokines TNF-α, IL-1β, IL-6, and IL-17 in jejunum, thereby impeding ISCs-driven epithelial regeneration and intestinal growth, which may provide a basal theory for the development of infant nutrients targeting stem cells to alleviate early weaning-induced intestinal problems.
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Affiliation(s)
- Junquan Tian
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Key Laboratory of Agro-Ecological Processes in Subtropical Region, Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China
- University of Chinese Academy of Sciences, Beijing, 100008, China
| | - Yuying Li
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Key Laboratory of Agro-Ecological Processes in Subtropical Region, Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China
- University of Chinese Academy of Sciences, Beijing, 100008, China
| | - Xuetai Bao
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Key Laboratory of Agro-Ecological Processes in Subtropical Region, Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China
- University of Chinese Academy of Sciences, Beijing, 100008, China
| | - Fan Yang
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Key Laboratory of Agro-Ecological Processes in Subtropical Region, Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China
- University of Chinese Academy of Sciences, Beijing, 100008, China
| | - Xiongzhuo Tang
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410000, Hunan, China
| | - Qian Jiang
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Key Laboratory of Agro-Ecological Processes in Subtropical Region, Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China.
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410000, Hunan, China.
| | - Yulong Yin
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Key Laboratory of Agro-Ecological Processes in Subtropical Region, Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China
- University of Chinese Academy of Sciences, Beijing, 100008, China
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410000, Hunan, China
| | - Kang Yao
- National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Key Laboratory of Agro-Ecological Processes in Subtropical Region, Laboratory of Animal Nutritional Physiology and Metabolic Process, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, Hunan, China.
- University of Chinese Academy of Sciences, Beijing, 100008, China.
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Liu M, Liu Q, Zou Q, Li J, Chu Z, Xiang J, Chen WQ, Miao ZF, Wang B. The composition and roles of gastric stem cells in epithelial homeostasis, regeneration, and tumorigenesis. Cell Oncol (Dordr) 2023:10.1007/s13402-023-00802-z. [PMID: 37010700 DOI: 10.1007/s13402-023-00802-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/21/2023] [Indexed: 04/04/2023] Open
Abstract
The epithelial lining of the stomach undergoes rapid turnover to preserve its structural and functional integrity, a process driven by long-lived stem cells residing in the antral and corpus glands. Several subpopulations of gastric stem cells have been identified and their phenotypic and functional diversities linked to spatiotemporal specification of stem cells niches. Here, we review the biological features of gastric stem cells at various locations of the stomach under homeostatic conditions, as demonstrated by reporter mice, lineage tracing, and single cell sequencing. We also review the role of gastric stem cells in epithelial regeneration in response to injury. Moreover, we discuss emerging evidence demonstrating that accumulation of oncogenic drivers or alteration of stemness signaling pathways in gastric stem cells promotes gastric cancer. Given a fundamental role of the microenvironment, this review highlights the role reprogramming of niche components and signaling pathways under pathological conditions in dictating stem cell fate. Several outstanding issues are raised, such as the relevance of stem cell heterogeneity and plasticity, and epigenetic regulatory mechanisms, to Helicobacter pylori infection-initiated metaplasia-carcinogenesis cascades. With the development of spatiotemporal genomics, transcriptomics, and proteomics, as well as multiplexed screening and tracing approaches, we anticipate that more precise definition and characterization of gastric stem cells, and the crosstalk with their niche will be delineated in the near future. Rational exploitation and proper translation of these findings may bring forward novel modalities for epithelial rejuvenation and cancer therapeutics.
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Affiliation(s)
- Meng Liu
- Department of Gastroenterology, Chongqing University Cancer Hospital, Chongqing University Medical School, Chongqing, 400030, P. R. China
- Department of Gastroenterology & Chongqing Key Laboratory of Digestive Malignancies, Daping Hospital, Army Medical University (Third Military Medical University), 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, P. R. China
| | - Qin Liu
- Department of Gastroenterology & Chongqing Key Laboratory of Digestive Malignancies, Daping Hospital, Army Medical University (Third Military Medical University), 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, P. R. China
| | - Qiang Zou
- Department of Gastroenterology & Chongqing Key Laboratory of Digestive Malignancies, Daping Hospital, Army Medical University (Third Military Medical University), 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, P. R. China
- Department of Hepatobiliary Pancreatic Tumor Center, Chongqing University Cancer Hospital, Chongqing University Medical School, Chongqing, 400030, P. R. China
| | - Jinyang Li
- Department of Gastroenterology & Chongqing Key Laboratory of Digestive Malignancies, Daping Hospital, Army Medical University (Third Military Medical University), 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, P. R. China
| | - Zhaole Chu
- Department of Gastroenterology & Chongqing Key Laboratory of Digestive Malignancies, Daping Hospital, Army Medical University (Third Military Medical University), 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, P. R. China
| | - Junyu Xiang
- Department of Gastroenterology & Chongqing Key Laboratory of Digestive Malignancies, Daping Hospital, Army Medical University (Third Military Medical University), 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, P. R. China
| | - Wei-Qing Chen
- Department of Gastroenterology, Chongqing University Cancer Hospital, Chongqing University Medical School, Chongqing, 400030, P. R. China.
| | - Zhi-Feng Miao
- Department of Surgical Oncology and General Surgery, Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors, Ministry of Education, The First Affiliated Hospital of China Medical University, Shenyang, 110001, P. R. China.
| | - Bin Wang
- Department of Gastroenterology & Chongqing Key Laboratory of Digestive Malignancies, Daping Hospital, Army Medical University (Third Military Medical University), 10 Changjiang Branch Road, Yuzhong District, Chongqing, 400042, P. R. China.
- Institute of Pathology and Southwest Cancer Center, and Key Laboratory of Tumor Immunopathology of Ministry of Education of China, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, P. R. China.
- Jinfeng Laboratory, Chongqing, 401329, P. R. China.
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Gaowa A, Park EJ, Kawamoto E, Qin Y, Shimaoka M. Recombinant soluble thrombomodulin accelerates epithelial stem cell proliferation in mouse intestinal organoids and promotes the mucosal healing in colitis. J Gastroenterol Hepatol 2021; 36:3149-3157. [PMID: 34370890 DOI: 10.1111/jgh.15656] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Received: 01/19/2021] [Revised: 07/15/2021] [Accepted: 08/03/2021] [Indexed: 12/09/2022]
Abstract
BACKGROUND AND AIM Epithelial regeneration, a critical step for the mucosal healing in inflammatory bowel disease, is tightly regulated by stem cells. Therefore, identification of the specific factors that induce stem cell proliferation could contribute to the development of effective strategies for treating inflammatory bowel disease. Recombinant soluble thrombomodulin (rsTM) has previously been shown to promote cell proliferation in skin and corneal wound healing in murine models, but its effects on intestinal epithelial cell proliferation remains unclear. METHODS Mouse intestinal organoids and dextran sulfate sodium (DSS)-induced colitis mouse model were used to assess the effects of rsTM on proliferation of intestinal epithelial cells. The size and budding morphologies of organoids were studied by confocal microscopy. The gene expression levels were analyzed by quantitative real-time polymerase chain reaction and immunofluorescence analysis. The effects of rsTM on DSS-induced colitis were investigated by evaluating body weight changes, colon length, histological score, and survival rate. RESULTS The rsTM markedly stimulated the growth of intestinal organoids, thereby increasing the surface areas and budding phenotypes of the organoids. rsTM also significantly upregulated the gene expression of intestinal stem cell-specific and epithelial cell-specific markers in a dose-dependent manner. Furthermore, the treatment with high concentrations of rsTM significantly improved the recovery of body weight, histological outcomes, colon length shortening, and prolonged the survival of mice with colitis. CONCLUSIONS The rsTM promotes intestinal stem cell proliferation in intestinal organoids and enhances the mucosal healing during recovery phase in DSS-induced colitis.
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Affiliation(s)
- Arong Gaowa
- Department of Molecular Pathobiology and Cell Adhesion Biology, Mie University Graduate School of Medicine, Tsu, Japan
| | - Eun Jeong Park
- Department of Molecular Pathobiology and Cell Adhesion Biology, Mie University Graduate School of Medicine, Tsu, Japan
| | - Eiji Kawamoto
- Department of Molecular Pathobiology and Cell Adhesion Biology, Mie University Graduate School of Medicine, Tsu, Japan.,Department of Emergency and Disaster Medicine, Mie University Graduate School of Medicine, Tsu, Japan
| | - Yan Qin
- Department of Molecular Pathobiology and Cell Adhesion Biology, Mie University Graduate School of Medicine, Tsu, Japan
| | - Motomu Shimaoka
- Department of Molecular Pathobiology and Cell Adhesion Biology, Mie University Graduate School of Medicine, Tsu, Japan
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Regmi S, Seo Y, Ahn JS, Pathak S, Acharya S, Nguyen TT, Yook S, Sung JH, Park JB, Kim JO, Young CS, Kim HS, Jeong JH. Heterospheroid formation improves therapeutic efficacy of mesenchymal stem cells in murine colitis through immunomodulation and epithelial regeneration. Biomaterials 2021; 271:120752. [PMID: 33730631 DOI: 10.1016/j.biomaterials.2021.120752] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/02/2021] [Indexed: 12/15/2022]
Abstract
Tissue repairing capacity and immunomodulatory effects of mesenchymal stem cells (MSCs) have been extensively utilized for treating various inflammatory disorders; however, inconsistent efficacy and therapeutic outcomes due to low survival rate after transplantation often restrain their clinical potential. To overcome these limitations, 3-dimensional culture (3D-culture) was established to augment stemness and paracrine functions of MSCs, although hypoxic stress at the core often leads to unexpected cell death. Thus, we designed a novel strategy to improve the microenvironment of MSCs by creating heterospheroids (HS) consisting of MSCs and quercetin (QUR)-loaded microspheres (MSCHS), to achieve local drug delivery to the cells. Notably, MSCHS exhibited resistance for senescence-associated phenotype and oxidative stress-induced apoptosis compared to 3D-cultured MSCs (MSC3D), as well as to 2D-cultured cells (MSC2D) in vitro. In a murine model of colitis, MSC3D and MSCHS exhibited enhanced anti-inflammatory impact than MSC2Dvia attenuating neutrophil infiltration and regulating helper T cell (Th) polarization into Th1 and Th17 cells. Interestingly, MSCHS provided better therapeutic outcomes compared to MSC3D, partially due to their enhanced survival capacity in vivo. Moreover, we found that MSC-derived paracrine factor, prostaglandin E2 (PGE2), can directly drive the epithelial regeneration process by inducing specialized tissue-repairing cell generation using the intestinal organoid culture. Importantly, MSC3D and MSCHS displayed an outstanding regeneration-inducing potency compared to MSC2D owing to their superior PGE2 secretion. Taken together, we suggest a convergent strategy of MSCHS formation with reactive oxygen species (ROS) scavenger, QUR, which can maximize the inflammation-attenuating and tissue-repairing capacity of MSCs, as well as the engraftment efficiency after transplantation.
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Tan J, Li L, Wang H, Wei L, Gao X, Zeng Z, Liu S, Fan Y, Liu T, Chen J. Biofunctionalized fibrin gel co-embedded with BMSCs and VEGF for accelerating skin injury repair. Mater Sci Eng C Mater Biol Appl 2021; 121:111749. [PMID: 33579437 DOI: 10.1016/j.msec.2020.111749] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 11/07/2020] [Accepted: 11/22/2020] [Indexed: 02/06/2023]
Abstract
Rapid and effective repair of epithelial tissue is desirable for improving the success rate of operation and reducing postoperative complications. Hydrogel is a widely studied wound repair material, especially as a wound dressing for damaged epithelial tissue. Based on the catalytic effect of thrombin on fibrinogen, in this study, a three-dimensional fibrin gel which of adequate epithelial cell compatibility was constructed by using thrombin and fibrinogen under the cross-linking action of calcium ion. Immunofluorescence staining and hematoxylin-eosin (H&E) staining showed that bone marrow mesenchymal stem cell (BMSC) was embedded in fibrin gel. Furthermore, vascular endothelial growth factor (VEGF) was used to induce BMSC to differentiate into CD31+ and vWF+ endothelial cell (EC) in fibrin gel. The results showed that the fibrin gel surface may effectively promote the adhesion and proliferation of EC and smooth muscle cell (SMC). After 15 days of culture, it was found that the BMSC embedded in the hydrogel had differentiated into EC. The results of in vivo skin wound experiment in rats further proved that the fibrin gel containing BMSC could promote wound healing and repair, and showed the potential to promote neovascularization at the injured site. The construction method of hydrogel materials proposed in this study has potential application value in the field of regenerative medicine.
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Kulkarni SB, Pathak H, Khanna S, Choubey S. A prospective, multi-center, open-label, single-arm phase 2b study of autologous adult live cultured buccal epithelial cells (AALBEC) in the treatment of bulbar urethral stricture. World J Urol 2020; 39:2081-2087. [PMID: 32929625 DOI: 10.1007/s00345-020-03415-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 08/13/2020] [Indexed: 10/23/2022] Open
Abstract
PURPOSE To evaluate the safety and efficacy of autologous adult live cultured buccal epithelial cells (AALBEC) in treatment and management of bulbar urethral stricture in men. METHODS This was a prospective, multi-center, open-label, single-arm phase 2b study. A total of 18 male patients with bulbar urethral stricture of at least 1 - 4 cm in length were enrolled in the study. All 16 patients had AALBEC implanted and were included in the safety set. Change in total American Urology Association (AUA) symptom score, urinary flow rates assessed by uroflowmetry and a requirement for surgery after 24 weeks from baseline were determined in patients. Data of treatment efficacy were analyzed. RESULTS The AUA score at baseline was 21 (3.9) that showed a statistically significant reduction starting from week 2 [8 (4.4), p = 0.0001] which sustained until week 24 [2 (1.2), p = 0.0005]. Overall mean total AUA symptom score was reduced by 90.5% after the treatment. Significant reductions from baseline at week-24 were also observed in voiding time (92.5 (47.3) vs. 51.9 (17.4) s, p = 0.0046) and flow time [86.9 (48.2) vs. 47.9 (19.6) s, p = 0.0052]. All patients showed absence of any significant adverse events. CONCLUSION Significant improvement was seen in the AUA symptom score and uroflowmetry parameters and no patients required surgery during 24 weeks post-treatment. It can be concluded that AALBEC is a safe and effective treatment for bulbar urethral stricture of 1 - 4 cm length to improve the quality of life and the physiological function of urethra.
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Affiliation(s)
- Sanjay B Kulkarni
- Kulkarni Endo Surgery Institute and Reconstructive Urology Centre, Pune, India.
| | - Hemant Pathak
- TNMC Medical College and B. Y. L. Nair Charitable Hospital, Leelavati Hospital, Mumbai, India
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Abstract
The skin has important barrier, sensory, and immune functions, contributing to the health and integrity of the organism. Extensive skin injuries that threaten the entire organism require immediate and effective treatment. Wound healing is a natural response, but in severe conditions, such as burns and diabetes, this process is insufficient to achieve effective treatment. Epidermal stem cells (EPSCs) are a multipotent cell type and are committed to the formation and differentiation of the functional epidermis. As the contributions of EPSCs in wound healing and tissue regeneration have been increasingly attracting the attention of researchers, a rising number of therapies based on EPSCs are currently under development. In this paper, we review the characteristics of EPSCs and the mechanisms underlying their functions during wound healing. Applications of EPSCs are also discussed to determine the potential and feasibility of using EPSCs clinically in wound healing.
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Affiliation(s)
- Ronghua Yang
- Department of Burn Surgery, The First People's Hospital of Foshan, Foshan, 528000, China
| | - Fengxia Liu
- Department of Human Anatomy, School of Basic Medical Science, Xinjiang Medical University, Urumqi, 830001, China
| | - Jingru Wang
- Department of Burn Surgery, The First People's Hospital of Foshan, Foshan, 528000, China
| | - Xiaodong Chen
- Department of Burn Surgery, The First People's Hospital of Foshan, Foshan, 528000, China
| | - Julin Xie
- Department of Burn Surgery, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 512100, China.
| | - Kun Xiong
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Morphological Sciences Building, Central South University, 172 Tongzi Po Road, Changsha, 410013, Hunan, China.
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