scholarly journals Recent Advances in Cell-Based Therapies for Ischemic Stroke

2020 ◽  
Vol 21 (18) ◽  
pp. 6718
Author(s):  
Satoshi Suda ◽  
Chikako Nito ◽  
Shoji Yokobori ◽  
Yuki Sakamoto ◽  
Masataka Nakajima ◽  
...  
Keyword(s):  
Stem Cells ◽  
Bone Marrow ◽  
Pluripotent Stem Cells ◽  
Neurological Disorders ◽  
Causes Of Death ◽  
Mononuclear Cells ◽  
Neurological Outcomes ◽  
Cell Based Therapy ◽  
Recent Advances ◽  
Marrow Mesenchymal Stem Cells

Stroke is the most prevalent cardiovascular disease worldwide, and is still one of the leading causes of death and disability. Stem cell-based therapy is actively being investigated as a new potential treatment for certain neurological disorders, including stroke. Various types of cells, including bone marrow mononuclear cells, bone marrow mesenchymal stem cells, dental pulp stem cells, neural stem cells, inducible pluripotent stem cells, and genetically modified stem cells have been found to improve neurological outcomes in animal models of stroke, and there are some ongoing clinical trials assessing their efficacy in humans. In this review, we aim to summarize the recent advances in cell-based therapies to treat stroke.

Abstract 697: Mobilization of Oct-4 + Bone Marrow-Derived Very Small Embryonic-Like Stem Cells in Patients with Acute Myocardial Infarction

Circulation ◽  
2007 ◽  
Vol 116 (suppl_16) ◽  
Author(s):  
Wojciech Wojakowski ◽  
Magda Kucia ◽  
Boguslaw Machalinski ◽  
Edyta Paczkowska ◽  
Joanna Ciosek ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Stem Cells ◽  
Bone Marrow ◽  
Pluripotent Stem Cells ◽  
Peripheral Blood ◽  
Mononuclear Cells ◽  
Small Cells ◽  
Acute Mi

Bone marrow-derived CD34 + CXCR4 + progenitor cells are mobilized into peripheral blood early in acute myocardial infarction (MI). Adult murine bone marrow contains population of small CD34 + lin − CD45 − CXCR4 + cells expressing markers of pluripotent stem cells (PSC) SSEA, Oct-4 and Nanog. This population of very small embryonic-like cells (VSEL) has unique morphology (small size 2– 4 μm, large nucleus, euchromatin) and capability to form embrioid bodies (EB). Murine EB-derived cells can in vitro differentiate into cells from all three germ layers including cardiomyocytes. We hypothesized that in patients with acute MI small cells expressing the VSEL immunophenotype and PSC markers are present in bone marrow and mobilized into peripheral blood. Blood samples (20 mL) from 18 patients with acute MI were obtained after 12 hours, 2 and 5 days after symptoms onset. Bone marrow samples (20 mL) were obtained from 2 patients with acute MI and 3 healthy volunteers. Mononuclear cells were isolated using hypotonic lysis and samples were analyzed by FACS. Mobilization of following cell populations was confirmed: hematopoietic lin − CD45 + CXCR4 + , lin − CD45 + CD133 + , lin − CD45 + CD34 + and non-hematopoietic (VSEL) lin − CD45 − CXCR4 + , lin − CD45 − CD133 + , lin − CD45 − CD34 + . Analysis of the cell number using lymphocyte gate showed more significant increase of CD45 + (hematopoietic) populations of lin − CD34 + , lin − CD133 + and lin − CXCR4 + cells. After gating for small events (VSEL size range) we found more significant mobilization of small, non-hematopoietic populations of lin − CD34 + , lin − CD133 + and lin − CXCR4 + cells (Table ). The expression of PSC markers (Oct-4, Nanog, SSEA-1) in VSEL was confirmed using real-time RT-PCR. Conclusion: We report for the first time that acute MI is associated with mobilization of non-hematopoietic VSELs expressing pluripotent stem cells markers.

Specific plasma membrane protein phenotype of culture-amplified and native human bone marrow mesenchymal stem cells

Blood ◽  
2008 ◽  
Vol 111 (5) ◽  
pp. 2631-2635 ◽  
Author(s):  
Bruno Delorme ◽  
Jochen Ringe ◽  
Nathalie Gallay ◽  
Yves Le Vern ◽  
Dominique Kerboeuf ◽  
...  
Keyword(s):  
Stem Cells ◽  
Bone Marrow ◽  
Mesenchymal Stem Cells ◽  
Plasma Membrane ◽  
Membrane Protein ◽  
Mononuclear Cells ◽  
Mesenchymal Cells ◽  
Plasma Membrane Protein ◽  
Native Bone ◽  
Marrow Mesenchymal Stem Cells

We have studied the plasma membrane protein phenotype of human culture-amplified and native bone marrow mesenchymal stem cells (BM MSCs). We have found, using microarrays and flow cytometry, that cultured cells express specifically 113 transcripts and 17 proteins that were not detected in hematopoietic cells. These antigens define a lineage-homogenous cell population of mesenchymal cells, clearly distinct from the hematopoietic lineages, and distinguishable from other cultured skeletal mesenchymal cells (periosteal cells and synovial fibroblasts). Among the specific membrane proteins present on cultured MSCs, 9 allowed the isolation from BM mononuclear cells of a minute population of native MSCs. The enrichment in colony-forming units–fibroblasts was low for CD49b, CD90, and CD105, but high for CD73, CD130, CD146, CD200, and integrin alphaV/beta5. In addition, the expression of CD73, CD146, and CD200 was down-regulated in differentiated cells. The new marker CD200, because of its specificity and immunomodulatory properties, deserves further in-depth studies.

scholarly journals In vitro expansion impaired the stemness of early passage mesenchymal stem cells for treatment of cartilage defects

2017 ◽  
Vol 8 (6) ◽  
pp. e2851-e2851 ◽  
Author(s):  
Tongmeng Jiang ◽  
Guojie Xu ◽  
Qiuyan Wang ◽  
Lihui Yang ◽  
Li Zheng ◽  
...  
Keyword(s):  
Stem Cells ◽  
Bone Marrow ◽  
Mesenchymal Stem Cells ◽  
Mononuclear Cells ◽  
Telomerase Activity ◽  
Cartilage Defects ◽  
Cell Based Therapy ◽  
Chondrogenic Potential ◽  
First Choice

Abstract In vitro cultured autologous mesenchymal stem cells (MSCs) within passage 5 have been approved for clinical application in stem cell-based treatment of cartilage defects. However, their chondrogenic potential has not yet been questioned or verified. In this study, the chondrogenic potential of bone marrow MSCs at passage 3 (P3 BMSCs) was investigated both in cartilage repair and in vitro, with freshly isolated bone marrow mononuclear cells (BMMNCs) as controls. The results showed that P3 BMSCs were inferior to BMMNCs not only in their chondrogenic differentiation ability but also as candidates for long-term repair of cartilage defects. Compared with BMMNCs, P3 BMSCs presented a decay in telomerase activity and a change in chromosomal morphology with potential anomalous karyotypes, indicating senescence. In addition, interindividual variability in P3 BMSCs is much higher than in BMMNCs, demonstrating genomic instability. Interestingly, remarkable downregulation in cell cycle, DNA replication and mismatch repair (MMR) pathways as well as in multiple genes associated with telomerase activity and chromosomal stability were found in P3 BMSCs. This result indicates that telomerase and chromosome anomalies might originate from expansion, leading to impaired stemness and pluripotency of stem cells. In vitro culture and expansion are not recommended for cell-based therapy, and fresh BMMNCs are the first choice.

scholarly journals Exploring the potential of human adipocytes in periodontal regeneration: A review

2020 ◽  
Vol 13 (1) ◽  
pp. 68-77
Author(s):  
Rebicca Ranjit ◽  
Pratik Manandhar ◽  
Soni Bista
Keyword(s):  
Stem Cells ◽  
Bone Marrow ◽  
Adipose Tissue ◽  
Adult Stem Cells ◽  
Current Knowledge ◽  
Periodontal Regeneration ◽  
Stromal Vascular Fraction ◽  
Human Adult ◽  
Cell Based Therapy ◽  
Recent Advances

Stem cells, initially identified in embryonic tissues and later in numerous adult tissues, tend to possess the potentiality to differentiate into various cell types. Though most flexible of all stem cell lines, ethical issues restrict the use of embryonic cells. Furthermore, induced pluripotent stem cells (iPS) and adult stem cells (e.g: bone marrow stroma) can also be used. However, procurement of autologous bone marrow has its potential limitations. An alternate source of autologous adult stem cells which can be procured in large quantities, under local anesthesia, with minimal discomfort would be of keen interest. In the present context, human adult adipose tissue may be the best appropriate alternative source of mesenchymal stem cells. Studies have shown that adipose stem cells (ASCs) extracted from subcutaneous human adult adipose tissue tend to contain heterogeneous cell population called stromal vascular fraction (SVF). It may be used directly or cultured in for selection and expansion of an adherent population, and hence, they are called ASCs. The adipose tissue, obtained by suction-assisted lipectomy (i.e., liposuction), are processed to obtain a fibroblast-like population of cells, also called processed lipoaspirate (PLA). PLA cells has the potentiality to differentiate in vitro into adipogenic, chondrogenic, myogenic, and osteogenic cells in the presence of lineage-specific induction factors. This attributable feature of ASCs may be of significant importance in future clinical cell-based therapy for periodontal disease as well. This review describes current knowledge & recent advances in ASCs & their application. This review describes current knowledge and recent advances in ASCs and their application in periodontal regeneration.  

scholarly journals Enhancement of Immunoregulatory Function of Modified Bone Marrow Mesenchymal Stem Cells by Targeting SOCS1

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Xiaoming Zhang ◽  
Fei Hua ◽  
Ziying Yang ◽  
Yueqiu Chen ◽  
Xiaomei Teng ◽  
...  
Keyword(s):  
Stem Cells ◽  
Bone Marrow ◽  
Flow Cytometry ◽  
Mesenchymal Stem Cells ◽  
Mononuclear Cells ◽  
Treg Cells ◽  
Control Group ◽  
Mrna Levels ◽  
Blank Control Group ◽  
Marrow Mesenchymal Stem Cells

Objective. The study aim to investigate the role of microRNA-155 (miR-155) on the immunoregulatory function of bone marrow mesenchymal stem cells (MSCs). Methods. MSCs were isolated from 2-week-old Sprague-Dawley rats and identified by flow cytometry using anti-CD29, anti-CD44, anti-CD34, and anti-CD45 antibodies. MSCs were transfected with miR155-mimics, miR155-inhibitor, and control oligos, respectively, and then cocultured with spleen mononuclear cells (SMCs). The mRNA levels of Th1, Th2, Th17, and Treg cell-specific transcription factors (Tbx21, Gata3, Rorc, and Foxp3, resp.) and the miR-155 target gene SOCS1 were detected by quantitative real-time PCR (qPCR) in SMCs. The proportion of CD4+ FOXP3+ Treg cells was detected by flow cytometry. In addition, the effects of MSCs transfected with miR-155 on the migration of rat SMCs were investigated by transwell chamber. Results. CD29 and CD44 were expressed in MSCs, while CD34 and CD45 were negative. The percentage of CD4+ FOXP3+ Treg cells in the SMC population was significantly higher compared with that noted in SMCs control group (p<0.001) following 72 hours of coculture with miR155-mimics-transfected SMCs. In contrast, the percentage of CD4+ FOXP3+ Treg cells in the SMCs cocultured with miR155-inhibitor-transfected MSCs was significantly lower compared with that noted in SMCs control group (p<0.001). MiR155-mimics-transfected MSCs inhibited the expression of Tbx21, Rorc, and SOCS1, while the expression of Gata3 and Foxp3 was increased. In contrast to the downregulation of the aforementioned genes, miR155-inhibitor-transfected MSCs resulted in upregulation of Tbx21, Rorc, and SOCS1 expression levels and inhibition of Gata3 and Foxp3. In the transwell assay, miR155-mimics-transfected MSCs exhibited lower levels of SMCs migration, while the miR155-inhibitor-transfected MSCs demonstrated significantly higher levels of migration, compared with the blank control group (p<0.01, resp.). Conclusion. miR-155 favors the differentiation of T cells into Th2 and Treg cells in MSCs, while it inhibits the differentiation to Th1 and Th17 cells.

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