Partition behavior of CD133+stem cells from human umbilical cord blood in aqueous two-phase systems: In route to establish novel stem cell primary recovery strategies

2014 ◽  
Vol 30 (3) ◽  
pp. 700-707 ◽  
Author(s):  
Mirna González-González ◽  
Marco Rito-Palomares ◽  
Olivia Méndez Quintero
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Umbilical Cord Blood ◽  
Human Umbilical Cord Blood ◽  
Human Umbilical Cord ◽  
Two Phase ◽  
Recovery Strategies ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Partition Behavior

scholarly journals A Small-Sized Population of Human Umbilical Cord Blood-Derived Mesenchymal Stem Cells Shows High Stemness Properties and Therapeutic Benefit

2020 ◽  
Vol 2020 ◽  
pp. 1-17 ◽  
Author(s):  
Miyeon Kim ◽  
Yun Kyung Bae ◽  
Soyoun Um ◽  
Ji Hye Kwon ◽  
Gee-Hye Kim ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Stem Cell ◽  
Cord Blood ◽  
Umbilical Cord ◽  
Umbilical Cord Blood ◽  
Surface Proteins ◽  
Lung Damage ◽  
Human Umbilical Cord Blood ◽  
Human Umbilical Cord

Mesenchymal stem cells (MSCs) represent a promising means to promote tissue regeneration. However, the heterogeneity of MSCs impedes their use for regenerative medicine. Further investigation of this phenotype is required to develop cell therapies with improved clinical efficacy. Here, a small-sized population of human umbilical cord blood-derived MSCs (UCB-MSCs) was isolated using a filter and centrifuge system to analyze its stem cell characteristics. Consequently, this population showed higher cell growth and lower senescence. Additionally, it exhibited diverse stem cell properties including differentiation, stemness, and adhesion, as compared to those of the population before isolation. Using cell surface protein array or sorting analysis, both EGFR and CD49f were identified as markers associated with the small-sized population. Accordingly, suppression of these surface proteins abolished the superior characteristics of this population. Moreover, compared to that with large or nonisolated populations, the small-sized population showed greater therapeutic efficacy by promoting the engraftment potential of infused cells and reducing lung damage in an emphysema mouse model. Therefore, the isolation of this small-sized population of UCB-MSCs could be a simple and effective way to enhance the efficacy of cell therapy.

CELLULAR AND MOLECULAR EVALUATION OF IN VITRO QUALITY PARAMETERS OF HUMAN UMBILICAL CORD BLOOD-DERIVED MESENCHYMAL STEM CELLS

2021 ◽  
pp. 52-54
Author(s):  
Sara Jabeen ◽  
Usha Gupta ◽  
Aleem Ahmed Khan
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Stem Cell ◽  
Cord Blood ◽  
Umbilical Cord ◽  
Umbilical Cord Blood ◽  
Human Umbilical Cord Blood ◽  
Human Umbilical Cord ◽  
Stem Cell Markers ◽  
Number Of Cells

Introduction: Establishing a reproducible adult stem cell culture system, such as mesenchymal stem cells (MSCs), is critical for elucidating the function of molecular markers associated with these cells' undifferentiated state. In this study, we describe some important parameters to be considered for a successful isolation, culture, and characterization of MSCs from human umbilical cord blood (hUCB). Methods: Five hUCB samples were collected from healthy female subjects who were free from infectious diseases and genetic disorders. Mononuclear cells (MNCs) were counted, and viability was determined using MTT assay. MNCs were cultured in DMEM supplemented with 10% fetal bovine serum and enriched through culture and characterized using morphometric, and molecular analysis. Results: The minimum number of cells was 12.5 million and highest number of cells was 20.6 million from all ve samples. In initial culture of MSCs from hUCB, various morphologic phenotypes were seen, although the cells eventually developed a homogeneous broblast-like shape at day 14 showing >80% conuency. Spindle-shaped clonogenic MSCs expressed a high level of CD90, CD105, and CD73, while negative expression of CD34. Our study provided evidence of expansion of enriched MSCs in culture from day 1 to day 21 as supported by data of CD90, CD105 and CD73 expression levels in a time-dependent manner. Conclusion: Our results suggest that the expanded hUCB harbor an enriched source of MSCs that express pluripotent stem cell markers and lack hematopoietic markers after culture and forms the basis for using hUCB as eminent source of MSCs, which can be used for different therapeutic applications.

Hoechst dye efflux reveals a novel CD7+CD34− lymphoid progenitor in human umbilical cord blood

Blood ◽  
2000 ◽  
Vol 96 (6) ◽  
pp. 2125-2133 ◽  
Author(s):  
Robert W. Storms ◽  
Margaret A. Goodell ◽  
Alan Fisher ◽  
Richard C. Mulligan ◽  
Clay Smith
Keyword(s):  
Stem Cells ◽  
Cord Blood ◽  
Umbilical Cord ◽  
Umbilical Cord Blood ◽  
Large Population ◽  
Lymphoid Cells ◽  
Human Umbilical Cord Blood ◽  
Human Umbilical Cord ◽  
Hematopoietic Stem ◽  
Cd34 Cells

Abstract A novel Hoechst 33342 dye efflux assay was recently developed that identifies a population of hematopoietic cells termed side population (SP) cells. In the bone marrow of multiple species, including mice and primates, the SP is composed primarily of CD34−cells, yet has many of the functional properties of hematopoietic stem cells (HSCs). This report characterizes SP cells from human umbilical cord blood (UCB). The SP in unfractionated UCB was enriched for CD34+ cells but also contained a large population of CD34− cells, many of which were mature lymphocytes. SP cells isolated from UCB that had been depleted of lineage-committed cells (Lin− UCB) contained CD34+ and CD34− cells in approximately equivalent proportions. Similar to previous descriptions of human HSCs, the CD34+Lin− SP cells were CD38dimHLA-DRdimThy-1dimCD45RA−CD71−and were enriched for myelo-erythroid precursors. In contrast, the CD34−Lin− SP cells were CD38−HLA-DR−Thy-1−CD71−and failed to generate myelo-erythroid progeny in vitro. The majority of these cells were CD7+CD11b+CD45RA+, as might be expected of early lymphoid cells, but did not express other lymphoid markers. The CD7+CD34−Lin− UCB SP cells did not proliferate in simple suspension cultures but did differentiate into natural killer cells when cultured on stroma with various cytokines. In conclusion, the human Lin− UCB SP contains both CD34+ multipotential stem cells and a novel CD7+CD34−Lin− lymphoid progenitor. This observation adds to the growing body of evidence that CD34− progenitors exist in humans.

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