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Demirayak B, Yüksel N, Çelik OS, Subaşı C, Duruksu G, Unal ZS, Yıldız DK, Karaöz E. Effect of bone marrow and adipose tissue-derived mesenchymal stem cells on the natural course of corneal scarring after penetrating injury. Exp Eye Res 2016; 151:227-35. [PMID: 27567556 DOI: 10.1016/j.exer.2016.08.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [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: 01/18/2016] [Revised: 06/08/2016] [Accepted: 08/23/2016] [Indexed: 12/13/2022]
Abstract
In the present study, we investigate and compare the efficacy of bone marrow- and adipose tissue-derived mesenchymal stem cell (MSCs) in corneal wound healing. A penetrating injury was created in the right corneas of Wistar rats (n = 40). Ten microliters of phosphate-buffered solution (PBS) containing 2 × 10(5) green fluorescent protein (GFP) labeled bone-marrow-derived MSCs to group 1 (n = 15), 10 μl of PBS containing 2 × 10(5) GFP-labeled adipose-tissue-derived MSCs to group 2 (n = 15), 10 μl PBS was injected into anterior chamber in group 3 (n = 10, control). Corneal opacity scoring, in vivo confocal microscopy, and histopathological evaluation were done at the end of 8 weeks. Immunofluorescence sections were evaluated to detect transplanted cells. Immune staining was performed to measure the expression levels of keratocan, aldehyde dehydrogenase (ALDH) and CD34. The gene expression levels of tumor necrosis factor (TNF-α), the interleukin 6 receptor (IL-6R), interleukin 12b (IL-12b), and transforming growth factor beta (TGF-β1) was measured on corneas. The establishment of stem cells in the corneas of the transplanted groups was confirmed by immunofluorescence staining. The expression of keratocan, ALDH, and CD34 increased in the transplanted groups (p < 0.05). The density of keratocytes increased significantly in both transplanted groups according to the in vivo confocal microscopy data (p < 0.05). The expression of TNF-α, IL-6R, and IL-12b decreased significantly in the transplanted groups (p < 0.05). Based on our findings, we consider that allogeneic stem cells facilitate the regeneration of corneal stroma and can be a cell source for stromal repopulation in diseased cornea.
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Affiliation(s)
- Bengi Demirayak
- Department of Ophthalmology, Bakirkoy Dr. Sadi Konuk Education and Research Hospital, Istanbul, Turkey.
| | - Nurşen Yüksel
- Department of Ophthalmology, School of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Onur Sinan Çelik
- Department of Ophthalmology, School of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Cansu Subaşı
- Center for Regenerative Medicine and Stem Cell Research and Manufacturing, Liv Hospital, Istanbul, Turkey
| | - Gökhan Duruksu
- Center for Stem Cell and Gene Therapies Research and Practice, Department of Stem Cell, Institute of Health Sciences, Kocaeli University, Kocaeli, Turkey
| | - Z Seda Unal
- Center for Stem Cell and Gene Therapies Research and Practice, Department of Stem Cell, Institute of Health Sciences, Kocaeli University, Kocaeli, Turkey
| | - Demir Kürşat Yıldız
- Department of Pathology, School of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Erdal Karaöz
- Center for Regenerative Medicine and Stem Cell Research and Manufacturing, Liv Hospital, Istanbul, Turkey; Department of Histology and Embryology, Faculty of Medicine, Istinye University, Turkey
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Tanriverdi G, Kaya-Dagistanli F, Ayla S, Demirci S, Eser M, Unal ZS, Cengiz M, Oktar H. Resveratrol can prevent CCl₄-induced liver injury by inhibiting Notch signaling pathway. Histol Histopathol 2016; 31:769-84. [PMID: 26742567 DOI: 10.14670/hh-11-720] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We investigated whether Notch signaling was increased in an experimental liver fibrosis model and examined the effects of resveratrol on Notch expression. Rats were divided into four groups: the control group, injected with physiological saline; the CCl₄ group; the CCl₄ plus resveratrol group; and the resveratrol group. After treatment, immunostaining was performed to detect Notch1, Notch3, Notch4, transforming growth factor (TGF)-beta, alpha-smooth muscle actin (SMA), glial fibrillary acidic protein (GFAP), and proliferating cell nuclear antigen (PCNA), and TUNEL assays were performed to evaluate apoptosis. Sirius red staining was used to detect fibrosis. Samples were also biochemically evaluated for glutathione (GSH), glutathione peroxidase (GPx), catalase (CAT), lipid peroxidation, and protein oxidation. GSH, GPx, and catalase activities were significantly decreased (p⟨0.001) in the CCl₄ group. Distinct collagen accumulation was detected around the central vein and portal areas, and numbers of Notch1-, Notch3-, and Notch4-positive cells were significantly increased (p⟨0.001) in fibrotic areas in the CCl₄ group. Increased expression of Notch proteins in fibrotic areas may support the role of Notch in mediating signaling associated with liver fibrosis through activation of hepatic stellate and progenitor cells. In contrast, resveratrol prevented liver fibrosis by decreasing lipid peroxidation and may be effective for inhibiting Notch signaling.
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Affiliation(s)
- Gamze Tanriverdi
- Department of Histology and Embryology, Istanbul University, Cerrahpasa Medical Faculty, Istanbul, Turkey.
| | - Fatma Kaya-Dagistanli
- Medical Biology Department, Istanbul University, Cerrahpasa Medical Faculty, Istanbul, Turkey.
| | - Sule Ayla
- Department of Histology and Embryology, Medipol University Medical Faculty, Istanbul, Turkey.
| | - Sibel Demirci
- Department of Histology and Embryology, Istanbul University, Cerrahpasa Medical Faculty, Istanbul, Turkey.
| | - Mediha Eser
- Department of Histology and Embryology, Istanbul University, Cerrahpasa Medical Faculty, Istanbul, Turkey.
| | - Z Seda Unal
- Stem Cell Department, IVF-ET Unit, Kocaeli University, Institute of Health Sciences, Istanbul, Turkey.
| | - Mujgan Cengiz
- Medical Biology Department, Istanbul University, Cerrahpasa Medical Faculty, Istanbul, Turkey.
| | - Huseyin Oktar
- Department of Histology and Embryology, Istanbul University, Cerrahpasa Medical Faculty, Istanbul, Turkey.
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Sariboyaci AE, Demircan PC, Gacar G, Unal ZS, Erman G, Karaoz E. Immunomodulatory properties of pancreatic islet-derived stem cells co-cultured with T cells: Does it contribute to the pathogenesis of type 1 diabetes? Exp Clin Endocrinol Diabetes 2014; 122:179-89. [PMID: 25014767 DOI: 10.1055/s-0034-1367004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Previously, we isolated stem cells from rat pancreatic islets (rPI-SCs) with similar characteristics of bone-marrow derived-mesenchymal stem cells (MSCs). We aimed to investigate the immunomodulatory effects of them on stimulated T-cells. METHODS Following in vitro co-culturing directly and indirectly, the response of T-cells stimulated by concanavalin-A and immunosuppressive activity of rPI-SCs were evaluated by analysing in terms of cell viability, proliferation and apoptosis, cell cycle, differentiation of Treg, cytokines and some regulatory factors produced from T and SCs. RESULTS Our results have firstly demonstrated that rPI-SCs like MSCs could regulate stimulated T-cell responses by altering their cell-cycle and cytokine profile, inhibiting the cell proliferation, and inducing the apoptosis and differentiation of Treg. Direct and indirect in vitro co-cultures of rPI-SCs with stimulated T-cells showed immunosuppressive effects. CONCLUSION Therefore, we are introducing a novel type of stem cell with immunomodulatory properties. On the other hand, it is questionable why PI-SCs cannot protect the insulin producing cells from attacks of autoreactive T-cells in the developing of type1 diabetes. For this purpose, further molecular researches in vitro and in vivo are needed to clarify why PI-SCs may not suppress attacks of autoreactive-immune-cells towards PIs. PI-SCs from diseased people should be compared with pancreas of healthy ones at both genomic and proteomic levels.
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Affiliation(s)
- A E Sariboyaci
- Center for Stem Cell and Gene Therapies Research and Practice, Institute of Health Sciences, Stem Cell Department, Kocaeli University, Kocaeli, Turkey
| | - P C Demircan
- Center for Stem Cell and Gene Therapies Research and Practice, Institute of Health Sciences, Stem Cell Department, Kocaeli University, Kocaeli, Turkey
| | - G Gacar
- Center for Stem Cell and Gene Therapies Research and Practice, Institute of Health Sciences, Stem Cell Department, Kocaeli University, Kocaeli, Turkey
| | - Z S Unal
- Center for Stem Cell and Gene Therapies Research and Practice, Institute of Health Sciences, Stem Cell Department, Kocaeli University, Kocaeli, Turkey
| | - G Erman
- Center for Stem Cell and Gene Therapies Research and Practice, Institute of Health Sciences, Stem Cell Department, Kocaeli University, Kocaeli, Turkey
| | - E Karaoz
- Center for Stem Cell and Gene Therapies Research and Practice, Institute of Health Sciences, Stem Cell Department, Kocaeli University, Kocaeli, Turkey
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Ercan E, Bagla AG, Aksoy A, Gacar G, Unal ZS, Asgun HF, Karaoz E. In vitro protection of adipose tissue-derived mesenchymal stem cells by erythropoietin. Acta Histochem 2014; 116:117-25. [PMID: 24011510 DOI: 10.1016/j.acthis.2013.06.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 04/16/2013] [Revised: 06/12/2013] [Accepted: 06/13/2013] [Indexed: 01/08/2023]
Abstract
Mobilization of stem cells and their differentiation into cardiomyocytes are known to have protective effects after myocardial infarction. The integrity of transplanted mesenchymal stem cells for cardiac regeneration is dependent on cell-cell or cell-matrix interaction, which is adversely affected by reactive oxygen species in an ischemic environment. Treatment with erythropoietin was shown to protect human adipose tissue derived mesenchymal stem cells in an ischemic injury in vitro model. The analyses indicated that expression of erythropoietin receptors played a pivotal role in erythropoietin mediated cell survival. In this study, the anti-apoptotic effect of erythropoietin on stem cells was analyzed in apoptosis-induced human mesenchymal stem cells. Apoptosis was induced in cultured adult human adipose tissue derived mesenchymal stem cells by hydrogen peroxide. A group of cultured cells was also treated with recombinant human erythropoietin in a concentration of 50 ng mL(-1). The degree of apoptosis was analyzed by flow-cytometry and immunohistochemical staining for Caspase 3. The average percentages of apoptotic cells were significantly higher in H2O2-induced stem cells than in cells co-cultured with erythropoietin (63.03 ± 4.96% vs 29 ± 3.41%, p<0.01). We conclude that preconditioning with erythropoietin suppresses apoptosis of mesenchymal stem cells and enhances their survival.
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Affiliation(s)
- Ertugrul Ercan
- Department of Cardiology, Faculty of Medicine, Izmir University, Izmir, Turkey
| | - Aysel Guven Bagla
- Department of Histology and Embryology, Faculty of Medicine, Canakkale Onsekiz Mart University, Canakkale, Turkey
| | - Ayca Aksoy
- Department of Stem Cells, Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Institute of Health Sciences, Kocaeli, Turkey
| | - Gulcin Gacar
- Department of Stem Cells, Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Institute of Health Sciences, Kocaeli, Turkey
| | - Z Seda Unal
- Department of Stem Cells, Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Institute of Health Sciences, Kocaeli, Turkey
| | - H Fatih Asgun
- Department of Cardiovascular Surgery, Faculty of Medicine, Canakkale Onsekiz Mart University, Canakkale, Turkey.
| | - Erdal Karaoz
- Department of Stem Cells, Center for Stem Cell and Gene Therapies Research and Practice, Kocaeli University, Institute of Health Sciences, Kocaeli, Turkey
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