Endothelial Cells Differentiated from Porcine Epiblast Stem Cells

Complex interactions between stem cells, vascular cells and fibroblasts represent the substrate of building microenvironment-embedded 3D structures that can be grafted or added to bone substitute scaffolds in tissue engineering or clinical bone repair. Human Adipose-derived Stem Cells (hASCs), human umbilical vein endothelial cells (HUVECs) and normal dermal human fibroblasts (NDHF) can be mixed together in three dimensional scaffold free constructs and their behaviour will emphasize their potential use as seeding points in bone tissue engineering. Various combinations of the aforementioned cell lines were compared to single cell line culture in terms of size, viability and cell proliferation. At 5 weeks, viability dropped for single cell line spheroids while addition of NDHF to hASC maintained the viability at the same level at 5 weeks Fibroblasts addition to the 3D construct of stem cells and endothelial cells improves viability and reduces proliferation as a marker of cell differentiation toward osteogenic line.

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EBF1 is expressed in pericytes and contributes to pericyte cell commitment

Histochemistry and Cell Biology ◽

10.1007/s00418-021-02015-7 ◽

2021 ◽

Author(s):

Francesca Pagani ◽

Elisa Tratta ◽

Patrizia Dell’Era ◽

Manuela Cominelli ◽

Pietro Luigi Poliani

Keyword(s):

Stem Cells ◽

Endothelial Cells ◽

Mesenchymal Stem Cells ◽

B Cell ◽

Cell Fate ◽

Early Stage ◽

Cell Lineage ◽

Cell Maturation ◽

Cell Commitment

AbstractEarly B-cell factor-1 (EBF1) is a transcription factor with an important role in cell lineage specification and commitment during the early stage of cell maturation. Originally described during B-cell maturation, EBF1 was subsequently identified as a crucial molecule for proper cell fate commitment of mesenchymal stem cells into adipocytes, osteoblasts and muscle cells. In vessels, EBF1 expression and function have never been documented. Our data indicate that EBF1 is highly expressed in peri-endothelial cells in both tumor vessels and in physiological conditions. Immunohistochemistry, quantitative reverse transcription polymerase chain reaction (RT-qPCR) and fluorescence-activated cell sorting (FACS) analysis suggest that EBF1-expressing peri-endothelial cells represent bona fide pericytes and selectively express well-recognized markers employed in the identification of the pericyte phenotype (SMA, PDGFRβ, CD146, NG2). This observation was also confirmed in vitro in human placenta-derived pericytes and in human brain vascular pericytes (HBVP). Of note, in accord with the key role of EBF1 in the cell lineage commitment of mesenchymal stem cells, EBF1-silenced HBVP cells showed a significant reduction in PDGFRβ and CD146, but not CD90, a marker mostly associated with a prominent mesenchymal phenotype. Moreover, the expression levels of VEGF, angiopoietin-1, NG2 and TGF-β, cytokines produced by pericytes during angiogenesis and linked to their differentiation and activation, were also significantly reduced. Overall, the data suggest a functional role of EBF1 in the cell fate commitment toward the pericyte phenotype.

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Synergy of molecularly mobile polyrotaxane surfaces with endothelial cell co-culture for mesenchymal stem cell mineralization

RSC Advances ◽

10.1039/d1ra01296g ◽

2021 ◽

Vol 11 (30) ◽

pp. 18685-18692

Author(s):

Hiroki Masuda ◽

Yoshinori Arisaka ◽

Masahiro Hakariya ◽

Takanori Iwata ◽

Tetsuya Yoda ◽

...

Keyword(s):

Stem Cells ◽

Endothelial Cells ◽

Mesenchymal Stem Cells ◽

Stem Cell ◽

Endothelial Cell ◽

Mesenchymal Stem Cell ◽

Molecular Mobility ◽

Culture System

Molecular mobility of polyrotaxane surfaces promoted mineralization in a co-culture system of mesenchymal stem cells and endothelial cells.

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Formative pluripotent stem cells show features of epiblast cells poised for gastrulation

Cell Research ◽

10.1038/s41422-021-00477-x ◽

2021 ◽

Author(s):

Xiaoxiao Wang ◽

Yunlong Xiang ◽

Yang Yu ◽

Ran Wang ◽

Yu Zhang ◽

...

Keyword(s):

Stem Cells ◽

Germ Cells ◽

Pluripotent Stem Cells ◽

Primordial Germ Cells ◽

Embryonic Stem ◽

Large Set ◽

Mouse Escs ◽

Epiblast Stem Cells ◽

Early Gastrula

AbstractThe pluripotency of mammalian early and late epiblast could be recapitulated by naïve embryonic stem cells (ESCs) and primed epiblast stem cells (EpiSCs), respectively. However, these two states of pluripotency may not be sufficient to reflect the full complexity and developmental potency of the epiblast during mammalian early development. Here we report the establishment of self-renewing formative pluripotent stem cells (fPSCs) which manifest features of epiblast cells poised for gastrulation. fPSCs can be established from different mouse ESCs, pre-/early-gastrula epiblasts and induced PSCs. Similar to pre-/early-gastrula epiblasts, fPSCs show the transcriptomic features of formative pluripotency, which are distinct from naïve ESCs and primed EpiSCs. fPSCs show the unique epigenetic states of E6.5 epiblast, including the super-bivalency of a large set of developmental genes. Just like epiblast cells immediately before gastrulation, fPSCs can efficiently differentiate into three germ layers and primordial germ cells (PGCs) in vitro. Thus, fPSCs highlight the feasibility of using PSCs to explore the development of mammalian epiblast.

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Cardiac regeneration: epicardial mediated repair

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2015.2147 ◽

2015 ◽

Vol 282 (1821) ◽

pp. 20152147 ◽

Cited By ~ 17

Author(s):

Teresa Kennedy-Lydon ◽

Nadia Rosenthal

Keyword(s):

Stem Cells ◽

Endothelial Cells ◽

Cardiac Fibroblasts ◽

Cardiac Regeneration ◽

Repair Process ◽

Regenerative Process ◽

Cardiac Stem Cell ◽

Cardiomyocyte Proliferation ◽

Lower Vertebrates

The hearts of lower vertebrates such as fish and salamanders display scarless regeneration following injury, although this feature is lost in adult mammals. The remarkable capacity of the neonatal mammalian heart to regenerate suggests that the underlying machinery required for the regenerative process is evolutionarily retained. Recent studies highlight the epicardial covering of the heart as an important source of the signalling factors required for the repair process. The developing epicardium is also a major source of cardiac fibroblasts, smooth muscle, endothelial cells and stem cells. Here, we examine animal models that are capable of scarless regeneration, the role of the epicardium as a source of cells, signalling mechanisms implicated in the regenerative process and how these mechanisms influence cardiomyocyte proliferation. We also discuss recent advances in cardiac stem cell research and potential therapeutic targets arising from these studies.

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High‐throughput screening in postimplantation haploid epiblast stem cells reveals Hs3st3b1 as a modulator for reprogramming

Stem Cells Translational Medicine ◽

10.1002/sctm.20-0468 ◽

2021 ◽

Author(s):

Qian Gao ◽

Wenhao Zhang ◽

Yiding Zhao ◽

Yaru Tian ◽

Yuna Wang ◽

...

Keyword(s):

Stem Cells ◽

High Throughput ◽

High Throughput Screening ◽

Epiblast Stem Cells

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Interaction between Galectin-3 and Integrins Mediates Cell-Matrix Adhesion in Endothelial Cells and Mesenchymal Stem Cells

International Journal of Molecular Sciences ◽

10.3390/ijms22105144 ◽

2021 ◽

Vol 22 (10) ◽

pp. 5144

Author(s):

Antonín Sedlář ◽

Martina Trávníčková ◽

Pavla Bojarová ◽

Miluše Vlachová ◽

Kristýna Slámová ◽

...

Keyword(s):

Stem Cells ◽

Endothelial Cells ◽

Cell Adhesion ◽

Vascular Tissue ◽

Cell Functions ◽

Matrix Adhesion ◽

Cell Matrix ◽

Selective Ligand ◽

Galectin 3 ◽

Cell Matrix Adhesion

Galectin-3 (Gal-3) is a β-galactoside-binding protein that influences various cell functions, including cell adhesion. We focused on the role of Gal-3 as an extracellular ligand mediating cell-matrix adhesion. We used human adipose tissue-derived stem cells and human umbilical vein endothelial cells that are promising for vascular tissue engineering. We found that these cells naturally contained Gal-3 on their surface and inside the cells. Moreover, they were able to associate with exogenous Gal-3 added to the culture medium. This association was reduced with a β-galactoside LacdiNAc (GalNAcβ1,4GlcNAc), a selective ligand of Gal-3, which binds to the carbohydrate recognition domain (CRD) in the Gal-3 molecule. This ligand was also able to detach Gal-3 newly associated with cells but not Gal-3 naturally present on cells. In addition, Gal-3 preadsorbed on plastic surfaces acted as an adhesion ligand for both cell types, and the cell adhesion was resistant to blocking with LacdiNAc. This result suggests that the adhesion was mediated by a binding site different from the CRD. The blocking of integrin adhesion receptors on cells with specific antibodies revealed that the cell adhesion to the preadsorbed Gal-3 was mediated, at least partially, by β1 and αV integrins—namely α5β1, αVβ3, and αVβ1 integrins.

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