1
|
Luo F, Jiang W, Xu Y, Liu XM, Wang W, Zhang W, Luo C. The Mechanisms Involved in Mesenchymal Stem Cell Alleviation of Sepsis-Induced Acute Lung Injury in Mice: A Pilot Study. Curr Ther Res Clin Exp 2020; 93:100593. [PMID: 32760471 PMCID: PMC7393454 DOI: 10.1016/j.curtheres.2020.100593] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 06/21/2020] [Indexed: 12/19/2022] Open
Abstract
Background Acute lung injury is a common complication of sepsis in intensive care unit patients. Inflammation is among the main mechanisms of sepsis. Therefore, suppression of inflammation is an important mechanism for sepsis treatment. Mesenchymal stem cells (MSCs) have been reported to exhibit antimicrobial properties. Objective The present study investigated the effects of MSCs on sepsis-induced acute lung injury. Methods Male C57BL/6 mice underwent a cecal ligation and puncture (CLP) operation to induce sepsis and then received either normal saline or MSCs (1 × 106 cells intravenously) at 3 hours after surgery. Survival after surgery was assessed. Lung injury was assessed by histology score, the presence of lung edema, vascular permeability, inflammatory cell infiltration, and cytokine levels in bronchoalveolar lavage fluid. Finally, we tested nuclear factor kappa-light-chain-enhancer of activated B cells activation in lung tissue. Results As expected, CLP caused lung injury as indicated by significant increases in the histopathology score, lung wet to dry weight ratio, and total protein concentration. However, mice treated with MSCs had amelioration of the lung histopathologic changes, lung wet to dry weight ratio, and total protein concentration. The levels of cytokines tumor necrosis factor alpha, interleukin 6, interleukin 1β, and interleukin 17 in bronchoalveolar lavage fluid were dramatically decreased after MSCs treatment. In contrast, expression of interleukin 10 was increased after MSCs treatment. Moreover, mice treated with MSCs had a higher survival rate than the CLP group. Neutrophil infiltration into bronchoalveolar lavage fluid was attenuated after MSCs injection, but the amounts of macrophages observed in the MSC group showed no significant differences compared with the CLP group. In addition, MSCs treatment significantly reduced nuclear factor kappa-light-chain-enhancer of activated B cells activation in lung tissue. Conclusions Based on the above findings, treatment with MSCs dampened the inflammatory response and inhibited nuclear factor kappa-light-chain-enhancer of activated B cells activation in the mouse CLP model. Thus, MSCs may be a potential new agent for the treatment of sepsis-induced acute lung injury. (Curr Ther Res Clin Exp. 2020; 81:XXX-XXX).
Collapse
Affiliation(s)
- Feng Luo
- The Affiliated Hospital of Qingdao University, Shandong, China
| | - Wei Jiang
- The Affiliated Hospital of Qingdao University, Shandong, China
| | - Yan Xu
- The Affiliated Hospital of Qingdao University, Shandong, China
| | - Xue-Mei Liu
- The Affiliated Hospital of Qingdao University, Shandong, China
| | - Wei Wang
- The Affiliated Hospital of Qingdao University, Shandong, China
| | - Wei Zhang
- The Affiliated Hospital of Qingdao University, Shandong, China
| | - Congjuan Luo
- The Affiliated Hospital of Qingdao University, Shandong, China
| |
Collapse
|
2
|
Tripathy S, Singh S, Das SK. Potential of breastmilk in stem cell research. Cell Tissue Bank 2019; 20:467-488. [PMID: 31606767 DOI: 10.1007/s10561-019-09791-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 10/01/2019] [Indexed: 11/28/2022]
Abstract
Breastmilk is a dynamic, multi-faceted, and complex fluid containing a plethora of biochemical and cellular components that execute developmental effects or differentiation program, providing nourishment and immunity to newborns. Recently, it was reported that breastmilk contains a heterogeneous population of naïve cells, including pluripotent stem cells, multipotent stem cells, immune cells, and non-immune cells. The stem cells derived from breastmilk possess immune privilege and non-tumorigenic properties. Thus, breastmilk may represent an ideal source of stem cells collected by non-perceive procedure than other available sources. Thus, this "maternally originating natural regenerative medicine" may have innumerable applications in clinical biology, cosmetics, and pharmacokinetics. This review describes the efficient integrated cellular system of mammary glands, the impressive stem cell hierarchy of breastmilk, and their possible implications in translational research and therapeutics.
Collapse
Affiliation(s)
- Seema Tripathy
- Centre for Biotechnology, Siksha 'O' Anusandhan (Deemed to be University), Kalinga Nagar, Ghatikia, Bhubaneswar, 751 003, India.
| | - Shikha Singh
- Centre for Biotechnology, Siksha 'O' Anusandhan (Deemed to be University), Kalinga Nagar, Ghatikia, Bhubaneswar, 751 003, India
| | - Saroj Kumar Das
- Centre for Biotechnology, Siksha 'O' Anusandhan (Deemed to be University), Kalinga Nagar, Ghatikia, Bhubaneswar, 751 003, India
| |
Collapse
|
3
|
Carotenuto F, Teodori L, Maccari AM, Delbono L, Orlando G, Di Nardo P. Turning regenerative technologies into treatment to repair myocardial injuries. J Cell Mol Med 2019; 24:2704-2716. [PMID: 31568640 PMCID: PMC7077550 DOI: 10.1111/jcmm.14630] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 06/28/2019] [Accepted: 07/23/2019] [Indexed: 02/06/2023] Open
Abstract
Regenerative therapies including stem cell treatments hold promise to allow curing patients affected by severe cardiac muscle diseases. However, the clinical efficacy of stem cell therapy remains elusive, so far. The two key roadblocks that still need to be overcome are the poor cell engraftment into the injured myocardium and the limited knowledge of the ideal mixture of bioactive factors to be locally delivered for restoring heart function. Thus, therapeutic strategies for cardiac repair are directed to increase the retention and functional integration of transplanted cells in the damaged myocardium or to enhance the endogenous repair mechanisms through cell‐free therapies. In this context, biomaterial‐based technologies and tissue engineering approaches have the potential to dramatically impact cardiac translational medicine. This review intends to offer some consideration on the cell‐based and cell‐free cardiac therapies, their limitations and the possible future developments.
Collapse
Affiliation(s)
- Felicia Carotenuto
- Centro Interdipartimentale di Medicina Rigenerativa, Università di Roma Tor Vergata, Rome, Italy.,Dipartimento di Scienze Cliniche e Medicina Traslazionale, Università di Roma Tor Vergata, Rome, Italy.,Diagnostics and Metrology (FSN-TECFIS-DIM), ENEA, C.R. Frascati, Rome, Italy
| | - Laura Teodori
- Diagnostics and Metrology (FSN-TECFIS-DIM), ENEA, C.R. Frascati, Rome, Italy
| | - Anna Maria Maccari
- Centro Interdipartimentale di Medicina Rigenerativa, Università di Roma Tor Vergata, Rome, Italy.,Dipartimento di Scienze Cliniche e Medicina Traslazionale, Università di Roma Tor Vergata, Rome, Italy
| | - Luciano Delbono
- Wake Forest University School of Medicine, Winston Salem, NC, USA
| | - Giuseppe Orlando
- Wake Forest University School of Medicine, Winston Salem, NC, USA.,Department of Surgery, Wake Forest University School of Medicine, Winston Salem, NC, USA
| | - Paolo Di Nardo
- Centro Interdipartimentale di Medicina Rigenerativa, Università di Roma Tor Vergata, Rome, Italy.,Dipartimento di Scienze Cliniche e Medicina Traslazionale, Università di Roma Tor Vergata, Rome, Italy.,I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| |
Collapse
|
4
|
Selim SA, El-Baset SAA, Kattaia AAA, Askar EM, Elkader EA. Bone marrow-derived mesenchymal stem cells ameliorate liver injury in a rat model of sepsis by activating Nrf2 signaling. Histochem Cell Biol 2018; 151:249-262. [PMID: 30250973 DOI: 10.1007/s00418-018-1731-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/18/2018] [Indexed: 01/08/2023]
Abstract
Sepsis is a fatal condition that leads to serious systemic inflammation and multiple organ dysfunction syndromes. This study was designed to investigate the possible therapeutic effect of bone marrow-derived mesenchymal stem cells (BMSCs) on sepsis-induced liver injury. We also aimed to examine the role of Nrf2 activation in modulating the response to sepsis following BMSCs treatment. Twenty-four adult male albino rats were assigned to: control, lipopolysaccharide (LPS) and LPS-stem cell groups. Liver samples were processed for light and electron microscope examinations. Immunohistochemical localization of BAX, proliferating cell nuclear antigen and nuclear factor-erythroid 2-related factor 2 (Nrf2) was carried out. Liver homogenates were prepared for assessment of reduced glutathione, glutathione peroxidase, tumor necrosis factor-alpha and interleukin-6 and also real-time PCR analysis of Nrf2 expression. BMSCs treatment improved the histopathological changes of the liver, enhanced tissue regeneration and decreased apoptosis following sepsis. We reported highly significant enhancement in Nrf2 expressions at mRNA and protein levels in the LPS-stem cell group compared with the LPS group. The up regulation of Nrf2 was probably implicated in decreasing inflammatory cytokine levels and counteracting oxidative stress induced by sepsis. Thus, BMSCs therapies could be a viable approach to treat sepsis-induced liver damage by activating Nrf2 signaling.
Collapse
Affiliation(s)
- Sally A Selim
- Department of Histology and Cell Biology, Faculty of Medicine, Zagazig University, Koliat Al Tob Street, Zagazig, Ash Sharqia Governorate, 44519, Egypt
| | - Samia A Abd El-Baset
- Department of Histology and Cell Biology, Faculty of Medicine, Zagazig University, Koliat Al Tob Street, Zagazig, Ash Sharqia Governorate, 44519, Egypt
| | - Asmaa A A Kattaia
- Department of Histology and Cell Biology, Faculty of Medicine, Zagazig University, Koliat Al Tob Street, Zagazig, Ash Sharqia Governorate, 44519, Egypt.
| | - Eman M Askar
- Department of Histology and Cell Biology, Faculty of Medicine, Zagazig University, Koliat Al Tob Street, Zagazig, Ash Sharqia Governorate, 44519, Egypt
| | - Eman Abd Elkader
- Department of Biochemistry, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| |
Collapse
|
5
|
Mesenchymal Stem Cells Improve Ischemic Stroke Injury by Anti-Inflammatory Properties in Rat Model of Middle Cerebral Artery Occlusion. IRANIAN RED CRESCENT MEDICAL JOURNAL 2018. [DOI: 10.5812/ircmj.55085] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
6
|
Varshney R, Ali Q, Wu C, Sun Z. Monocrotaline-Induced Pulmonary Hypertension Involves Downregulation of Antiaging Protein Klotho and eNOS Activity. Hypertension 2016; 68:1255-1263. [PMID: 27672025 DOI: 10.1161/hypertensionaha.116.08184] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Accepted: 08/15/2016] [Indexed: 12/20/2022]
Abstract
The objective of this study is to investigate whether stem cell delivery of secreted Klotho (SKL), an aging-suppressor protein, attenuates monocrotaline-induced pulmonary vascular dysfunction and remodeling. Overexpression of SKL in mesenchymal stem cells (MSCs) was achieved by transfecting MSCs with lentiviral vectors expressing SKL-green fluorescent protein (GFP). Four groups of rats were treated with monocrotaline, whereas an additional group was given saline (control). Three days later, 4 monocrotaline-treated groups received intravenous delivery of nontransfected MSCs, MSC-GFP, MSC-SKL-GFP, and PBS, respectively. Ex vivo vascular relaxing responses to acetylcholine were diminished in small pulmonary arteries (PAs) in monocrotaline-treated rats, indicating pulmonary vascular endothelial dysfunction. Interestingly, delivery of MSCs overexpressing SKL (MSC-SKL-GFP) abolished monocrotaline-induced pulmonary vascular endothelial dysfunction and PA remodeling. Monocrotaline significantly increased right ventricular systolic blood pressure, which was attenuated significantly by MSC-SKL-GFP, indicating improved PA hypertension. MSC-SKL-GFP also attenuated right ventricular hypertrophy. Nontransfected MSCs slightly, but not significantly, improved PA hypertension and pulmonary vascular endothelial dysfunction. MSC-SKL-GFP attenuated monocrotaline-induced inflammation, as evidenced by decreased macrophage infiltration around PAs. MSC-SKL-GFP increased SKL levels, which rescued the downregulation of SIRT1 (Sirtuin 1) expression and endothelial NO synthase (eNOS) phosphorylation in the lungs of monocrotaline-treated rats. In cultured endothelial cells, SKL abolished monocrotaline-induced downregulation of eNOS activity and NO levels and enhanced cell viability. Therefore, stem cell delivery of SKL is an effective therapeutic strategy for pulmonary vascular endothelial dysfunction and PA remodeling. SKL attenuates monocrotaline-induced PA remodeling and PA smooth muscle cell proliferation, likely by reducing inflammation and restoring SIRT1 levels and eNOS activity.
Collapse
Affiliation(s)
- Rohan Varshney
- From the Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City
| | - Quaisar Ali
- From the Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City
| | - Chengxiang Wu
- From the Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City
| | - Zhongjie Sun
- From the Department of Physiology, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City.
| |
Collapse
|
7
|
Kariminekoo S, Movassaghpour A, Rahimzadeh A, Talebi M, Shamsasenjan K, Akbarzadeh A. Implications of mesenchymal stem cells in regenerative medicine. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2016; 44:749-57. [PMID: 26757594 DOI: 10.3109/21691401.2015.1129620] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Mesenchymal stem cells (MSCs) are a population of multipotent progenitors which reside in bone marrow, fat, and some other tissues and can be isolated from various adult and fetal tissues. Self-renewal potential and multipotency are MSC's hallmarks. They have the capacity of proliferation and differentiation into a variety of cell lineages like osteoblasts, condrocytes, adipocytes, fibroblasts, cardiomyocytes. MSCs can be identified by expression of some surface molecules like CD73, CD90, CD105, and lack of hematopoietic specific markers including CD34, CD45, and HLA-DR. They are hopeful tools for regenerative medicine for repairing injured tissues. Many studies have focused on two significant features of MSC therapy: (I) systemically administered MSCs home to sites of ischemia or injury, and (II) MSCs can modulate T-cell-mediated immunological responses. MSCs express chemokine receptors and ligands involved in cells migration and homing process. MSCs induce immunomedulatory effects on the innate (dendritic cells, monocyte, natural killer cells, and neutrophils) and the adaptive immune system cells (T helper-1, cytotoxic T lymphocyte, and B lymphocyte) by secreting soluble factors like TGF-β, IL-10, IDO, PGE-2, sHLA-G5, or by cell-cell interaction. In this review, we discuss the main applications of mesenchymal stem in Regenerative Medicine and known mechanisms of homing and Immunomodulation of MSCs.
Collapse
Affiliation(s)
- Saber Kariminekoo
- a Hematology and Oncology Research Center, Tabriz University of Medical Sciences , Tabriz , Iran ;,b Student Research Committee, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Aliakbar Movassaghpour
- a Hematology and Oncology Research Center, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Amirbahman Rahimzadeh
- a Hematology and Oncology Research Center, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Mehdi Talebi
- a Hematology and Oncology Research Center, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Karim Shamsasenjan
- a Hematology and Oncology Research Center, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Abolfazl Akbarzadeh
- c Biotechnology Research Center, Tabriz University of Medical Sciences , Tabriz , Iran ;,d Stem Cell Research Center, Tabriz University of Medical Sciences , Tabriz , Iran
| |
Collapse
|
8
|
Guillaume O, Teuschl AH, Gruber-Blum S, Fortelny RH, Redl H, Petter-Puchner A. Emerging Trends in Abdominal Wall Reinforcement: Bringing Bio-Functionality to Meshes. Adv Healthc Mater 2015; 4:1763-89. [PMID: 26111309 DOI: 10.1002/adhm.201500201] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 05/12/2015] [Indexed: 12/19/2022]
Abstract
Abdominal wall hernia is a recurrent issue world-wide and requires the implantation of over 1 million meshes per year. Because permanent meshes such as polypropylene and polyester are not free of complications after implantation, many mesh modifications and new functionalities have been investigated over the last decade. Indeed, mesh optimization is the focus of intense development and the biomaterials utilized are now envisioned as being bioactive substrates that trigger various physiological processes in order to prevent complications and to promote tissue integration. In this context, it is of paramount interest to review the most relevant bio-functionalities being brought to new meshes and to open new avenues for the innovative development of the next generation of meshes with enhanced properties for functional abdominal wall hernia repair.
Collapse
Affiliation(s)
- Olivier Guillaume
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology; Donaueschingenstraße 13 A-1200 Vienna Austria
- Austrian Cluster for Tissue Regeneration; Donaueschingenstrasse 13 A-1200 Vienna Austria
| | - Andreas Herbert Teuschl
- Austrian Cluster for Tissue Regeneration; Donaueschingenstrasse 13 A-1200 Vienna Austria
- University of Applied Sciences Technikum Wien; Department of Biochemical Engineering; Höchstädtplatz 5 1200 Vienna Austria
| | - Simone Gruber-Blum
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology; Donaueschingenstraße 13 A-1200 Vienna Austria
- Austrian Cluster for Tissue Regeneration; Donaueschingenstrasse 13 A-1200 Vienna Austria
- Department of General Visceral and Oncological Surgery; Wilhelminenspital der Stadt Wien; Montleartstraße 37 A-1171 Vienna Austria
| | - René Hartmann Fortelny
- Austrian Cluster for Tissue Regeneration; Donaueschingenstrasse 13 A-1200 Vienna Austria
- Department of General Visceral and Oncological Surgery; Wilhelminenspital der Stadt Wien; Montleartstraße 37 A-1171 Vienna Austria
| | - Heinz Redl
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology; Donaueschingenstraße 13 A-1200 Vienna Austria
- Austrian Cluster for Tissue Regeneration; Donaueschingenstrasse 13 A-1200 Vienna Austria
| | - Alexander Petter-Puchner
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology; Donaueschingenstraße 13 A-1200 Vienna Austria
- Austrian Cluster for Tissue Regeneration; Donaueschingenstrasse 13 A-1200 Vienna Austria
| |
Collapse
|
9
|
Yang JF, Cao HC, Pan QL, Yu J, Li J, Li LJ. Mesenchymal stem cells from the human umbilical cord ameliorate fulminant hepatic failure and increase survival in mice. Hepatobiliary Pancreat Dis Int 2015; 14:186-93. [PMID: 25865692 DOI: 10.1016/s1499-3872(15)60354-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Cell therapy has been promising for various diseases. We investigated whether transplantation of human umbilical cord mesenchymal stem cells (hUCMSCs) has any therapeutic effects on D-galactosamine/lipopolysaccharide (GalN/LPS)-induced fulminant hepatic failure in mice. METHODS hUCMSCs isolated from human umbilical cord were cultured and transplanted via the tail vein into severe combined immune deficiency mice with GalN/LPS-induced fulminant hepatic failure. After transplantation, the localization and differentiation of hUCMSCs in the injured livers were investigated by immunohistochemical and genetic analyses. The recovery of the injured livers was evaluated histologically. The survival rate of experimental animals was analyzed by the Kaplan-Meier method and log-rank test. RESULTS hUCMSCs expressed high levels of CD29, CD73, CD13, CD105 and CD90, but did not express CD31, CD79b, CD133, CD34, and CD45. Cultured hUCMSCs displayed adipogenic and osteogenic differentiation potential. Hematoxylin and eosin staining revealed that transplantation of hUCMSCs reduced hepatic necrosis and promoted liver regeneration. Transplantation of hUCMSCs prolonged the survival rate of mice with fulminant hepatic failure. Polymerase chain reaction for human alu sequences showed the presence of human cells in mouse livers. Positive staining for human albumin, human alpha-fetoprotein and human cytokeratin 18 suggested the formation of hUCMSCs-derived hepatocyte-like cells in vivo. CONCLUSIONS hUCMSC was a potential candidate for stem cell based therapies. After transplantation, hUCMSCs partially repaired hepatic damage induced by GalN/LPS in mice. hUCMSCs engrafted into the injured liver and differentiated into hepatocyte-like cells.
Collapse
Affiliation(s)
- Jin-Feng Yang
- The State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, Zhejiang University School of Medicine; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, 79 Qingchun Road, Hangzhou 310003, China.
| | | | | | | | | | | |
Collapse
|
10
|
Lombardo E, Poll TVD, DelaRosa O, Dalemans W. Mesenchymal stem cells as a therapeutic tool to treat sepsis. World J Stem Cells 2015; 7:368-379. [PMID: 25815121 PMCID: PMC4369493 DOI: 10.4252/wjsc.v7.i2.368] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 11/13/2014] [Accepted: 12/17/2014] [Indexed: 02/06/2023] Open
Abstract
Sepsis is a clinical syndrome caused by a deregulated host response to an infection. Sepsis is the most frequent cause of death in hospitalized patients. Although knowledge of the pathogenesis of sepsis has increased substantially during the last decades, attempts to design effective and specific therapies targeting components of the derailed host response have failed. Therefore, there is a dramatic need for new and mechanistically alternative therapies to treat this syndrome. Based on their immunomodulatory properties, adult mesenchymal stem or stromal cells (MSCs) can be a novel therapeutic tool to treat sepsis. Indeed, MSCs reduce mortality in experimental models of sepsis by modulating the deregulated inflammatory response against bacteria through the regulation of multiple inflammatory networks, the reprogramming of macrophages and neutrophils towards a more anti-inflammatory phenotype and the release of anti-microbial peptides. This report will review the current knowledge on the effects of MSC treatment in preclinical experimental small animal models of sepsis.
Collapse
|
11
|
Pascual-Miguelañez I, Salinas-Gomez J, Fernandez-Luengas D, Villar-Zarra K, Clemente LV, Garcia-Arranz M, Olmo DG. Systemic treatment of acute liver failure with adipose derived stem cells. J INVEST SURG 2014; 28:120-6. [PMID: 25517764 DOI: 10.3109/08941939.2014.987407] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE OF THE STUDY The definitive treatment for liver failure is, currently, liver transplantation. Research into other possible treatments, focused on achieving regeneration of the liver parenchyma, have led to the development of methods to generate hepatocytes from stem cells. In our study, we transplant allogenic adipose-derived stem cells (ASCs), not previously differentiated to hepatocytes, to treat acute liver failure induced by intraperitoneal administration of carbon tetrachloride (CCl4) in a Sprague-Dawley rat model. MATERIAL AND METHODS The ASCs were delivered via the tail vein, having previously been labeled with PKH26, a fluorescent membrane marker. Two control groups were established, Group 1(n = 15) consisting of olive oil (5 mL/kg) and Group 2(n = 15): 1 × 10(6) PKH26-labeled ASCs. Further, two study groups, Group 3(n = 30): CCl4 dissolved in olive oil and Group 4(n = 30): CCl4 dissolved in olive oil and 1 × 10(6) PKH26-labeled ASCs completed the experimental design. RESULTS Blood samples were analyzed, finding AST and ALT levels significantly higher in treatment over control groups at 24 and 48 hours. The mortality rates were statistically different between control groups and Group 3 (Group 1-3 p = .04, Group 2-3 p = .04) and between Groups 3 and 4 (p = .02). Examining the liver parenchyma, a significantly higher number of ASCs were observed in Group 4 than in Group 2 at all time points (p = .00). CONCLUSIONS The intravenous injection of allogenic ASCs in this model of CCl4-induced liver failure reduced the mortality in treated animals. ASCs injected in the rat tail vein were found in the liver in animals with induced acute liver failure.
Collapse
|
12
|
Rahimzadeh A, Mirakabad FST, Movassaghpour A, Shamsasenjan K, Kariminekoo S, Talebi M, Shekari A, Zeighamian V, Ghalhar MG, Akbarzadeh A. Biotechnological and biomedical applications of mesenchymal stem cells as a therapeutic system. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2014; 44:559-70. [PMID: 25340260 DOI: 10.3109/21691401.2014.968823] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Mesenchymal stem cells (MSCs) are non-hematopoietic, multipotent progenitor cells which reside in bone marrow (BM), support homing of hematopoietic stem cells (HSCs) and self-renewal in the BM. These cells have the potential to differentiate into tissues of mesenchymal origin, such as fibroblasts, adipocytes, cardiomyocytes, and stromal cells. MSCs can express surface molecules like CD13, CD29, CD44, CD73, CD90, CD166, CXCL12 and toll-like receptors (TLRs). Different factors, such as TGF-β, IL-10, IDO, PGE-2, sHLA-G5, HO, and Galectin-3, secreted by MSCs, induce interaction in cell to cell immunomodulatory effects on innate and adaptive cells of the immune system. Furthermore, these cells can stimulate and increase the TH2 and regulatory T-cells through inhibitory effects on the immune system. MSCs originate from the BM and other tissues including the brain, adipose tissue, peripheral blood, cornea, thymus, spleen, fallopian tube, placenta, Wharton's jelly and umbilical cord blood. Many studies have focused on two significant features of MSC therapy: (I) MSCs can modulate T-cell-mediated immunological responses, and (II) systemically administered MSCs home in to sites of ischemia or injury. In this review, we describe the known mechanisms of immunomodulation and homing of MSCs. As a result, this review emphasizes the functional role of MSCs in modulating immune responses, their capability in homing to injured tissue, and their clinical therapeutic potential.
Collapse
Affiliation(s)
- Amirbahman Rahimzadeh
- a Hematology and Oncology Research Center, Tabriz University of Medical Sciences , Tabriz , Iran.,b Student Research Committee, Tabriz University of Medical Sciences , Tabriz , Iran
| | | | - Aliakbar Movassaghpour
- a Hematology and Oncology Research Center, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Karim Shamsasenjan
- d Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine , Tabriz , Iran
| | - Saber Kariminekoo
- a Hematology and Oncology Research Center, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Mehdi Talebi
- e Hematology and Blood Banking Department, Faculty of Medical Science , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Abolfazl Shekari
- f Department Of Medical Genetic , Zanjan University of Medical Sciences , Zanjan , Iran
| | - Vahideh Zeighamian
- g Department of Medical Biotechnology , Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Masoud Gandomkar Ghalhar
- g Department of Medical Biotechnology , Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Abolfazl Akbarzadeh
- h Department of Medical Nanotechnology , Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences , Tabriz , Iran
| |
Collapse
|
13
|
Abstract
Recent progress in using stem cells for tissue repair and functional restoration has aroused much attention due to its potential to provide a cue for many diseases such as myocardial infarction. Stem cell therapy for cardiovascular disease has been studied extensively at both experimental and clinical levels. Pluripotent stem cells and mesenchymal stem cells were proven to be effective for myocardial regeneration, angiogenesis, and cardiac functional restoration. In this review, we will concisely discuss advantages and disadvantages of currently-used stem cells for cardiovascular repair and regeneration. The limitations and uniqueness of some types of stem cells will also be discussed. Although substantial progress has been made over the last decade about stem cells in cardiovascular regeneration, many challenges lie ahead before the therapeutic potentials of stem cells can be fully recognized.
Collapse
|
14
|
Gao Y, Krpata DM, Criss CN, Liu L, Posielski N, Rosen MJ, Novitsky YW. Effects of mesenchymal stem cell and fibroblast coating on immunogenic potential of prosthetic meshes in vitro. Surg Endosc 2014; 28:2357-67. [PMID: 24972922 DOI: 10.1007/s00464-014-3470-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Accepted: 01/20/2014] [Indexed: 01/01/2023]
Abstract
BACKGROUND The aim of this study was to reveal the effect of fibroblast or mesenchymal stem cell (MSC) coating on the mesh-induced production of IL-1β, IL-6, and VEGF by macrophages. METHODS Four commonly used surgical meshes were tested in this study, including Parietex, SoftMesh, TIGR, and Strattice. One-square-centimeter pieces of each mesh were placed on top of a monolayer of human fibroblasts or rat MSCs. The coating status was monitored with a light microscope. The human promonocytic cell line U937 was induced to differentiate into macrophages (MΦ). Three weeks later, meshes were transferred to new 24-well plates and cocultured with the MΦs for 72 h. Culture medium was collected and analyzed for IL-1β, IL-6, and VEGF production using standard ELISA essays. Parallel mesh samples were fixed with paraformaldehyde or glutaraldehyde for histology or transmission electronic microscopy (TEM) analyses, respectively. RESULTS Uncoated meshes induced increased production of all three cytokines compared with macrophages cultured alone. HF coating further increased the production of both IL-6 and VEGF but reduced IL-1β production. Except for the SoftMesh group, MSC coating significantly blunted release of all cytokines to levels even lower than with MΦs cultured alone. MΦs tended to deteriorate in the presence of MSCs. Both histology and TEM revealed intimate interactions between cell-coated meshes and MΦs. CONCLUSIONS Cytokine response to fibroblast coating varied, while MSC coating blunted the immunogenic effect of both synthetic and biologic meshes in vitro. Cell coating appears to affect mesh biocompatibility and may become a key process in mesh evolution.
Collapse
Affiliation(s)
- Yue Gao
- University Hospitals Case Medical Center, Case Western Reserve University, 11100 Euclid Avenue, Cleveland, OH, 44106, USA
| | | | | | | | | | | | | |
Collapse
|
15
|
Thakker R, Yang P. Mesenchymal stem cell therapy for cardiac repair. CURRENT TREATMENT OPTIONS IN CARDIOVASCULAR MEDICINE 2014; 16:323. [PMID: 24898315 DOI: 10.1007/s11936-014-0323-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
OPINION STATEMENT Owing to the prevalence of heart disease and the lack of effective long-term solutions for managing cardiac injury, research has turned to cell therapy as a potential mechanism for myocardial repair. Mesenchymal stem cells (MSC) in particular have become popular because their differentiative ability and their angiogenic and immunomodulatory properties make them attractive candidates for transplantation. However, there is still debate regarding the optimal strategy for the delivery of these cells. Recent clinical studies have isolated MSCs from a variety of tissue origins and have also tested the benefits of pretreatment with cardiogenic growth factors. Meanwhile, a newer school of thought instead supports the utilization of cardiomyocytes generated from MSC-derived induced pluripotent stem cells. This review will examine the promise of MSC therapy, discuss the results of past work, and propose steps that must be taken in the future.
Collapse
Affiliation(s)
- Rahul Thakker
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University, Stanford, CA, USA,
| | | |
Collapse
|
16
|
Ayatollahi M, Hesami Z, Jamshidzadeh A, Gramizadeh B. Antioxidant Effects of Bone Marrow Mesenchymal Stem Cell against Carbon Tetrachloride-Induced Oxidative Damage in Rat Livers. Int J Organ Transplant Med 2014; 5:166-73. [PMID: 25426285 PMCID: PMC4243048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
BACKGROUND Liver fibrosis results from excessive accumulation of extracellular matrix, which affects liver function over time and leads to its failure. In the past, liver transplant was thought to be the only treatment for end-stage liver disease, but due to the shortage of proper donors other medical treatments have been taken into consideration. OBJECTIVE To evaluate the therapeutic effects of bone marrow derived mesenchymal stem cells (BM-MSC) in CCl4 damaged rats. METHODS Liver damage in adult male Wistar rats was induced with carbon tetrachloride (CCl4). The rats were divided into normal control group, receiving CCl4, and those receiving CCl4 + marrow derived-MSC. Human BM-MSC was isolated, cultured, and characterized. The rats were injected with xenograft MSCs into the hepatic lobes of the liver. In the eighth week, blood samples were taken from all groups. Histological examination and biochemical analyses were used to compare the morphological and functional liver regeneration among different groups. Measurement of lipid peroxidation and glutathione transferase activity was also performed. RESULTS Histopathology and biochemical analyses indicated that local injection of human BM-MSCs was effective in treating liver failure in the rat model. Furthermore, oxidative stress was attenuated by increased level of GSH content after MSC transplantation. CONCLUSION Evidence of this animal model approach showed that bone marrow-derived MSCs promote an antioxidant response and support the potential of using MSCs transplantation as an effective treatment modality for liver disease.
Collapse
Affiliation(s)
- M. Ayatollahi
- Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran,Shiraz Institutes for Regenerative Medicine, Shiraz University of Medical Sciences, Shiraz, Iran ,Correspondence: Maryam Ayatollahi, PhD, Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. Tel/Fax: +98-71-3647-4331, E-mail:
| | - Z. Hesami
- Department of Biology, Science and Research Branch, Islamic Azad University, Fars, Iran
| | - A. Jamshidzadeh
- Department of Pharmacology and Toxicology, Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - B. Gramizadeh
- Transplant Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| |
Collapse
|
17
|
Gao Y, Liu LJ, Blatnik JA, Krpata DM, Anderson JM, Criss CN, Posielski N, Novitsky YW. Methodology of fibroblast and mesenchymal stem cell coating of surgical meshes: a pilot analysis. J Biomed Mater Res B Appl Biomater 2013; 102:797-805. [PMID: 24142485 DOI: 10.1002/jbm.b.33061] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 08/11/2013] [Accepted: 09/27/2013] [Indexed: 12/27/2022]
Abstract
Coating of various synthetic, absorbable, and biologic meshes with mesenchymal stem cells (MSCs) and fibroblasts was analyzed qualitatively and quantitatively. Five hernia meshes-light weight monofilament polypropylene (Soft Mesh), polyester (Parietex-TET), polylactide composite (TIGR), heavy weight monofilament polypropylene (Marlex), and porcine dermal collagen (Strattice)-were coated with three cell lines: human dermal fibroblasts (HFs), rat kidney fibroblasts (NRKs), and rat MSCs. Cell densities were determined at different time points. Samples also underwent histology and transmission electron microscopic (TEM) analyses. It required HFs 3 weeks to cover the entire mesh, while only 2 weeks for NRKs and MSCs to do so. MSCs had no preference for any of the meshes and produced the highest cell densities on Parietex and TIGR. Substrate-preference accounted for the significantly lower fibroblast densities on TIGR than Parietex. Fibroblasts failed to coat Marlex. Strattice, which had the least surface area, generated comparable cell densities to Parietex. Both histology and TEM confirmed cell coating of mesh surface. Various prosthetics can be coated by certain cell strains. Both mesh composition and cell preference dramatically influence the coating process. This methodology provides foundation for novel avenues of modulation of host response to various modern synthetic and biologic meshes.
Collapse
Affiliation(s)
- Yue Gao
- Department of Surgery, Case Comprehensive Hernia Center, University Hospitals Case Medical Center, Case Western Reserve University, Cleveland, Ohio
| | | | | | | | | | | | | | | |
Collapse
|
18
|
The Necessity of a Systematic Approach for the Use of MSCs in the Clinical Setting. Stem Cells Int 2013; 2013:892340. [PMID: 23864866 PMCID: PMC3705875 DOI: 10.1155/2013/892340] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Revised: 05/26/2013] [Accepted: 06/05/2013] [Indexed: 12/16/2022] Open
Abstract
Cell therapy has emerged as a potential therapeutic strategy in regenerative disease. Among different cell types, mesenchymal stem/stromal cells have been wildly studied in vitro, in vivo in animal models and even used in clinical trials. However, while clinical applications continue to increase markedly, the understanding of their physiological properties and interactions raises many questions and drives the necessity of more caution and supervised strategy in their use.
Collapse
|
19
|
McFadden D, Souba WW. The Journal of Surgical Research–2013. J Surg Res 2013. [DOI: 10.1016/j.jss.2013.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
20
|
Gruttadauria S, Grosso G, Pagano D, Biondi A, Echeverri G, Seria E, Pietrosi G, Liotta R, Basile F, Gridelli B. Marrow-Derived Mesenchymal Stem Cells Restore Biochemical Markers of Acute Liver Injury in Experimental Model. Transplant Proc 2013; 45:480-6. [DOI: 10.1016/j.transproceed.2012.06.087] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 04/20/2012] [Accepted: 06/06/2012] [Indexed: 01/02/2023]
|
21
|
King MW, Neff AW, Mescher AL. The developing Xenopus limb as a model for studies on the balance between inflammation and regeneration. Anat Rec (Hoboken) 2012; 295:1552-61. [PMID: 22933418 DOI: 10.1002/ar.22443] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Accepted: 12/16/2011] [Indexed: 01/21/2023]
Abstract
The roles of inflammation and immune cell reactivity triggered by amputation have only recently begun to be addressed in investigations of epimorphic regeneration, although studies of tissue repair in mammals clearly show the importance of the immune system in determining the quality of the repair process. Here, we first review inflammation-related work in non-mammalian systems of epimorphic regeneration which suggests that regeneration of an amputated appendage requires continuous modulation of the local immune response, from the first hours after amputation through the period of blastema patterning. We then present data on the effects of anti-inflammatory and proinflammatory agents on regeneration of larval Xenopus hindlimbs. Treatment with the glucocorticoid beclomethasone immediately after amputation inhibits regeneration in regeneration-complete stage 53 limbs. Other anti-inflammatory agents, including the inhibitors of cyclooxygenase-2 (COX-2) activity celecoxib and diclofenac, applied similarly to larvae amputated at stage 55, when the capacity for limb regeneration is normally being lost, restore regenerative capacity. This suggests that although injury-related events sensitive to glucocorticoids are necessary for regeneration, resolution of the inflammatory response may also be required to allow the complete regenerative response and normal blastema patterning. Conversely, if resolution of inflammation is prevented by local treatment of amputated limbs with beryllium, a strong immunoadjuvant, regeneration is inhibited, and gene expression data suggest that this inhibition results from a failure of normal blastema patterning. Both positive and negative effects of immune- or inflammation-related activities occur during anuran limb regeneration and this underscores the importance of considering immune cells in studies of epimorphic regeneration.
Collapse
Affiliation(s)
- Michael W King
- Indiana University Center for Regenerative Biology and Medicine, Indiana University School of Medicine, Terre Haute, Indiana, USA
| | | | | |
Collapse
|
22
|
The Journal of Surgical Research – 2012. J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
23
|
Wannemuehler TJ, Manukyan MC, Brewster BD, Rouch J, Poynter JA, Wang Y, Meldrum DR. Advances in mesenchymal stem cell research in sepsis. J Surg Res 2011; 173:113-26. [PMID: 22225756 DOI: 10.1016/j.jss.2011.09.053] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Revised: 09/22/2011] [Accepted: 09/27/2011] [Indexed: 01/08/2023]
Abstract
BACKGROUND Sepsis remains a source of morbidity and mortality in the postoperative patient despite appropriate resuscitative and antimicrobial approaches. Recent research has focused upon additional interventions such as exogenous cell-based therapy. Mesenchymal stem cells (MSCs) exhibit multiple beneficial properties through their capacity for homing, attenuating the inflammatory response, modulating immune cells, and promoting tissue healing. Recent animal trials have provided evidence that MSCs may be useful therapeutic adjuncts. MATERIALS AND METHODS A directed search of recent medical literature was performed utilizing PubMed to examine the pathophysiology of sepsis, mechanisms of mesenchymal stem cell interaction with host cells, sepsis animal models, and recent trials utilizing stem cells in sepsis. RESULTS MSCs continue to show promise in the treatment of sepsis by their intrinsic ability to home to injured tissue, secrete paracrine signals to limit systemic and local inflammation, decrease apoptosis in threatened tissues, stimulate neoangiogenesis, activate resident stem cells, beneficially modulate immune cells, and exhibit direct antimicrobial activity. These effects are associated with reduced organ dysfunction and improved survival in animal models. CONCLUSION Research utilizing animal models of sepsis has provided a greater understanding of the beneficial properties of MSCs. Their capacity to home to sites of injury and use paracrine mechanisms to change the local environment to ultimately improve organ function and survival make MSCs attractive in the treatment of sepsis. Future studies are needed to further evaluate the complex interactions between MSCs and host tissues.
Collapse
Affiliation(s)
- Todd J Wannemuehler
- Department of Surgery, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.
| | | | | | | | | | | | | |
Collapse
|
24
|
Kronsteiner B, Wolbank S, Peterbauer A, Hackl C, Redl H, van Griensven M, Gabriel C. Human mesenchymal stem cells from adipose tissue and amnion influence T-cells depending on stimulation method and presence of other immune cells. Stem Cells Dev 2011; 20:2115-26. [PMID: 21381973 DOI: 10.1089/scd.2011.0031] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Mesenchymal stem cells (MSCs) are multipotent progenitor cells exerting immunomodulatory effects on cells of the innate and adaptive immune system. It has been shown that an inflammatory milieu is required for the activation of MSC-mediated immunomodulation, and interferon-γ (IFN-γ) plays an important role in this process. We determined the influence of IFN-γ on human adipose-derived stem cells (ASCs) and human amniotic mesenchymal stromal cells (hAMSCs). We further evaluated the effect of MSCs on stimulated T-cells and peripheral blood mononuclear cells (PBMCs) in a cell-contact independent setting. On IFN-γ treatment, ASCs and hAMSCs possessed significantly higher antiproliferative properties and showed surface characteristics of nonprofessional antigen presenting cells (HLA-DR(+)CD40(med+)CD54(high)) with a possible regulatory phenotype (PD-L1(+)PD-L2(+)). The effect of ASCs and hAMSCs on cytokine secretion and T-cell activation was dependent on stimulation method and cellular context. Although ASCs and hAMSCs highly inhibited cytokine secretion of stimulated PBMCs, this was not observed in the case of purified T-cells. The presence of ASCs even favored the secretion of pro-inflammatory cytokines including IFN-γ by T-cells, although T-cell proliferation was efficiently inhibited. Further, ASCs enhanced the number of CD69(+) T-cells independent of the stimuli and cellular context. Interestingly, ASCs significantly suppressed CD25 expression on phytohemagglutinin stimulated PBMCs but had no effect on αCD3/αCD28 stimulated cells. Depending on the stimulation method and cellular context, immune cells create a specific cytokine milieu in vitro, thus differently influencing MSCs and, in turn, affecting their action on immune cells.
Collapse
|