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Dysfunction of iPSC-derived endothelial cells in human Hutchinson-Gilford progeria syndrome.

08:00 EDT 14th August 2019 | BioPortfolio

Summary of "Dysfunction of iPSC-derived endothelial cells in human Hutchinson-Gilford progeria syndrome."

Children with Hutchinson-Gilford progeria syndrome (HGPS) succumb to myocardial infarction and stroke in their teen years. Endothelial dysfunction is an early event in more common forms of atherosclerosis. Endothelial pathobiology may contribute to HGPS, but a comprehensive characterization of endothelial function in HGPS has not been performed. iPSCs derived from fibroblasts of HGPS patients or unaffected relatives were differentiated into endothelial cells (ECs). Immunofluorescent signal of the pluripotent stem cell markers SSEA4, Oct4, Sox2 and TRAI-60 was similar in HGPS or control iPSCs. Following the differentiation, FACS analysis and immunocytochemistry for CD31 and CD144 revealed a smaller percentage of ECs from HGPS iPSCs. Immunostaining for Lamin A revealed nuclear dysmorphology in HGPS iPSC-ECs. Furthermore, these cells were significantly larger and rounded, and they proliferated less, features which are typical of senescent endothelial cells. HGPS iPSC-ECs manifested less Dil-Ac-LDL uptake; less DAF-2DA staining for nitric oxide generation and formed fewer networks in matrigel . In immunodeficient mice injected with iPSC-ECs, HGPS iPSC-ECs generated a sparser vascular network compared to the control, with reduced capillary number. Telomere length (T/S ratio) of HGPS iPSC-EC was reduced as assessed by mmqPCR. iPSC-ECs derived from HGPS patients have dysmorphic appearance, abnormal nuclear morphology, shortened telomeres, reduced replicative capacity and impaired functions in vitro and in vivo. Targeting the endothelial abnormality in patients with HGPS may provide a new therapeutic avenue for the treatment of this condition.
HGPS:
Hutchinson-Gilford progeria syndrome; ZMPSTE24: Zinc metallopeptidase STE24;
FTI:
Farnesyltransferase inhibitors; VSMCs: Vascular smooth muscle cells; i
PSC:
Induced pluripotent stem cells;
EC:
Endothelial cells; h
TERT:
Human telomerase reverse transcriptase;
VEGF:
vascular endothelial growth factor; DAF-FM
DA:
3-Amino, 4-aminomethyl-2',7'-difluorofluorescein diacetate; BMP4: Bone Morphogenetic Protein 4; mmq
PCR:
mono chrome multiplex PCR;
SCG:
single-copy gene;
CSI:
Cell shape index.

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Journal Details

This article was published in the following journal.

Name: Cell cycle (Georgetown, Tex.)
ISSN: 1551-4005
Pages: 1-14

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Cells derived from BONE MARROW that circulate in the adult bloodstream and possess the potential to proliferate and differentiate into mature ENDOTHELIAL CELLS.

Endothelial cells that line venous vessels of the UMBILICAL CORD.

The original member of the family of endothelial cell growth factors referred to as VASCULAR ENDOTHELIAL GROWTH FACTORS. Vascular endothelial growth factor-A was originally isolated from tumor cells and referred to as "tumor angiogenesis factor" and "vascular permeability factor". Although expressed at high levels in certain tumor-derived cells it is produced by a wide variety of cell types. In addition to stimulating vascular growth and vascular permeability it may play a role in stimulating VASODILATION via NITRIC OXIDE-dependent pathways. Alternative splicing of the mRNA for vascular endothelial growth factor A results in several isoforms of the protein being produced.

A type of PLURIPOTENT STEM CELLS derived from early stage human embryos, up to and including the BLASTOCYST stage.

A vascular endothelial growth factor whose expression is found largely restricted to the GONADS; ADRENAL CORTEX; and PLACENTA. It has similar biological activity to VASCULAR ENDOTHELIAL GROWTH FACTOR-A.

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