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Chow L, Johnson V, Coy J, Regan D, Dow S. Mechanisms of Immune Suppression Utilized by Canine Adipose and Bone Marrow-Derived Mesenchymal Stem Cells. Stem Cells Dev 2017; 26:374-389. [PMID: 27881051 DOI: 10.1089/scd.2016.0207] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Mesenchymal stem cells (MSCs) from rodents and humans have been shown to suppress T cells by distinct primary pathways, with nitric oxide (NO)-dependent pathways dominating in rodents and indoleamine 2,3-deoxygenase (IDO)-dependent pathways dominating in humans. However, the immune suppressive pathways utilized by canine MSC have not been thoroughly studied, nor have bone marrow-derived MSC (BM-MSC) and adipose-derived MSC (Ad-MSC) been directly compared for their immune modulatory potency or pathway utilization. Therefore, canine BM-MSC and Ad-MSC were generated in vitro and their potency in suppressing T cell proliferation and cytokine production was compared, and differential gene expression. Mechanisms of T cells suppression were also investigated for both MSC types. We found that BM-MSC and Ad-MSC were roughly equivalent in terms of their ability to suppress T cell activation. However, the two MSC types used both shared and distinct biochemical pathways to suppress T cell activation. Ad-MSC utilized TGF-β signaling pathways and adenosine signaling to suppress T cell activation, whereas BM-MSC used cyclooxygenase, TGF-β and adenosine signaling pathways to suppress T cell activation. These results indicate that canine MSC are distinct from human and rodent MSC terms of their immune suppressive pathways, relying primarily on cyclooxygenase and TGF-β pathways for T cell suppression, rather than on NO or IDO-mediated pathways.
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Affiliation(s)
- Lyndah Chow
- 1 Center for Immune and Regenerative Medicine, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University , Ft. Collins, Colorado.,2 Center for Immune and Regenerative Medicine, Department of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University , Ft. Collins, Colorado
| | - Valerie Johnson
- 1 Center for Immune and Regenerative Medicine, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University , Ft. Collins, Colorado.,2 Center for Immune and Regenerative Medicine, Department of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University , Ft. Collins, Colorado
| | - Jonathan Coy
- 1 Center for Immune and Regenerative Medicine, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University , Ft. Collins, Colorado.,2 Center for Immune and Regenerative Medicine, Department of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University , Ft. Collins, Colorado
| | - Dan Regan
- 1 Center for Immune and Regenerative Medicine, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University , Ft. Collins, Colorado.,2 Center for Immune and Regenerative Medicine, Department of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University , Ft. Collins, Colorado
| | - Steven Dow
- 1 Center for Immune and Regenerative Medicine, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University , Ft. Collins, Colorado.,2 Center for Immune and Regenerative Medicine, Department of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University , Ft. Collins, Colorado
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Xiao HT, Wang L, Yu B. Superparamagnetic iron oxide promotes osteogenic differentiation of rat adipose-derived stem cells. Int J Clin Exp Med 2015; 8:698-705. [PMID: 25785046 PMCID: PMC4358501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 01/09/2015] [Indexed: 06/04/2023]
Abstract
Adult adipose tissue-derived stem cells (ADSCs) were found to hold great promise for use in bone tissue repair and regeneration. The present study aims to improve the osteogenesis of ADSCs by Superparamagnetic Iron Oxide (SPIO), which is widely used in tissue imaging. In this study, adipose-derived stem cells were harvested from 4-week-old male Sprague-Dawley (SD) rats. The proliferation rates of ADSCs labeling with or without SPIO were assessed by using trypan blue assay. The osteogenic capability was examined by employing the ALP activity detection kit. The mineralization of cells was determined by staining with Alizarin red S. Flow cytometry analysis was used to examine the cell apoptosis treated with or without SPIO. Real-time reverse transcription polymerase chain reaction (RT-PCR) analysis was utilized to detect the Runx2, Opn, Ocn and ALP genes in the cells. The results indicated that SPIO could promote rat ADSCs proliferation and reduce rat ADSCs apoptosis. Also, SPIO could significantly enhance the ALP and alizarin red staining of ADSCs in -SPIO group and +SPIO group (P < 0.01). Furthermore, we also found that the expression of Runx2, Opn, Ocn and ALP was significantly increased after SPIO treatment compared to the un-treated cells (P < 0.01). In conclusion, SPIO could promote the osteogenic differentiation of rat adipose-derived stem cells, which would also become a great potential therapeutic tool in bone tissue engineering.
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Affiliation(s)
- Hai-Tao Xiao
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University1838 Guangzhou Avenue North, Guangzhou 510515, People’s Republic of China
- Department of Traumatic Orthopaedics, Hainan Provincial People’s HospitalHaikou 570311, Hainan, People’s Republic of China
| | - Lei Wang
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University1838 Guangzhou Avenue North, Guangzhou 510515, People’s Republic of China
| | - Bin Yu
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University1838 Guangzhou Avenue North, Guangzhou 510515, People’s Republic of China
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