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Direct reprogramming of fibroblasts identifies signatures of vascular dysfunction in physiological aging and Hutchinson-Gilford Progeria Syndrome

ABSTRACT: Our goal was to identify gene expression and functional differences between directly reprogrammed vascular cells derived from young and old individuals, as wells as from healthy and Hutchinson-Gilford Progeria Syndrome (HGPS) donors. We provided a full characterization of reprogrammed endothelial and smooth muscle cells by comparing their gene expression with both the original fibroblasts and primary vascular cells, showing that reprogrammed cells express key vascular cell-identity genes and contribute to the formation of in vitro 3D vascular structures. We identified and validated biomarkers of vascular dysfunction in the context of physiological and accelerated aging typical of HGPS patients, and we demonstrated their direct contribution in the modulation of vascular permeability.

ORGANISM(S): Homo sapiens

PROVIDER: GSE140898 | GEO | 2020/09/03

REPOSITORIES: GEO

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Recapitulation of human premature aging by using iPSCs from Hutchinson-Gilford progeria syndrome

Project description:Hutchinson-Gilford progeria syndrome (HGPS) is a rare and fatal human premature aging disease1-5, characterized by premature atherosclerosis and degeneration of vascular smooth muscle cells (SMCs)6-8. HGPS is caused by a single-point mutation in the LMNA gene, resulting in the generation of progerin, a truncated mutant of lamin A. Accumulation of progerin leads to various aging-associated nuclear defects including disorganization of nuclear lamina and loss of heterochromatin9-12. Here, we report the generation of induced pluripotent stem cells (iPSCs) from fibroblasts obtained from patients with HGPS. HGPS-iPSCs show absence of progerin, and more importantly, lack the nuclear envelope and epigenetic alterations normally associated with premature aging. Upon differentiation of HGPS-iPSCs, progerin and its associated aging consequences are restored. In particular, directed differentiation of HGPS-iPSCs to SMCs leads to the appearance of premature senescent SMC phenotypes associated with vascular aging. Additionally, our studies identify DNA-dependent protein kinase catalytic subunit (DNAPKcs) as a component of the progerin-containing protein complex. The absence of nuclear DNAPKcs correlates with premature as well as physiological aging. Since progerin also accumulates during physiological aging6,12,13, our results provide an in vitro iPSC-based model with an acceleration progerin accumulation to study the pathogenesis of human premature and physiological vascular aging. Microarray gene expression profiling was done to: (1) Compare differences between WT fibroblasts and fibroblasts from patients suffering of the Hutchinson-Gilford progeria syndrome (2) Check that iPSC originating from WT and patients are in fact similar to ESC

2011-03-14 | E-GEOD-24487 | biostudies-arrayexpress

Endothelial YAP/TAZ activation is a key mediator of atherosclerosis in Hutchinson-Gilford progeria syndrome

Project description:Hutchinson-Gilford progeria syndrome (HGPS) is an extremely rare disease caused by the expression of progerin, an aberrant protein produced by a de novo point mutation in the LMNA gene. HGPS patients show accelerated aging and die prematurely, mainly from atherosclerosis complications. Understanding vascular disease onset and progression in HGPS and uncovering new therapeutic targets critically depend on the identification of cell type-specific molecular and functional alterations in the highly heterogeneous cell subsets present in the arterial wall. We used single-cell RNA sequencing to characterize the cellular and molecular landscape of the aorta in progerin-expressing LmnaG609G/G609G mice and wild type controls. Subendothelial extracellular matrix (ECM) stiffness was analyzed in decellularized aortas by atomic force microscopy, and aortic blood flow in vivo was monitored by ultrasound assessment. For atherosclerosis studies, we used progeroid atheroprone Apoe–/– LmnaG609G/G609G mice.

2024-10-17 | E-MTAB-13678 | biostudies-arrayexpress

Project description:This SuperSeries is composed of the following subset Series: GSE41751: Correlated alterations in genome organization, histone methylation, and DNA-lamina interactions in Hutchinson-Gilford progeria syndrome (expression) GSE41757: Correlated alterations in genome organization, histone methylation, and DNA-lamina interactions in Hutchinson-Gilford progeria syndrome (ChIP-seq) GSE41763: Correlated alterations in genome organization, histone methylation, and DNA-lamina interactions in Hutchinson-Gilford progeria syndrome (Hi-C) Refer to individual Series

2012-10-30 | E-GEOD-41764 | biostudies-arrayexpress

Reprogramming Hutchinson-Gilford Progeria Syndrome fibroblasts resets epigenomic landscape in patient-derived induced pluripotent stem cells [Affymetrix]

Project description:Hutchinson-Gilford Progeria Syndrome (HGPS) is a segmental premature aging disorder caused by the accumulation of the truncated form of Lamin A known as Progerin within the nuclear lamina. Cellular hallmarks of HGPS include nuclear blebbing, loss of peripheral heterochromatin, defective epigenetic inheritance, altered gene expression, and senescence. To model HGPS using iPSCs, detailed genome-wide and structural analysis of the epigenetic landscape is required to assess the initiation and progression of the disease. We generated a library of iPSC lines from fibroblasts of HGPS patients and controls, including one family trio. Our microarray results suggest that despite the presence of defects associated with Progerin in the nuclear lamina including structural defects, senescence and abnormal epigenetic marks, HGPS fibroblasts can be reprogrammed into iPSCs with transcriptomes that are essentially identical to control iPSCs and hESCs.

2020-01-02 | GSE84351 | GEO

Reprogramming Hutchinson-Gilford Progeria Syndrome fibroblasts resets epigenomic landscape in patient-derived induced pluripotent stem cells [ChIP-Seq]

2020-01-02 | GSE84356 | GEO

Project description:Hutchinson-Gilford progeria syndrome (HGPS) is a premature aging disease that is frequently caused by a de novo point mutation at position 1824 in LMNA. This mutation activates a cryptic splice donor site in exon 11, and leads to an in-frame deletion within the prelamin A mRNA and the production of a dominant negative lamin A protein, known as progerin. Here we show that HGPS cells experience genome-wide alterations in patterns of H3K27me3 deposition, changes in the associations of genomic loci with nuclear lamin A/C, and, at late passages, genome-wide loss of spatial compartmentalization of active and inactive chromatin domains that characterizes chromosome folding in normal cells. We further demonstrate that the H3K27me3 changes associate with gene expression alterations in HGPS cells. Our results support a model that the accumulation of progerin in the nuclear lamina leads to altered H3K27me3 marks in heterochromatin, possibly through the down-regulation of EZH2, and disrupts heterochromatin-lamina interactions. These changes may then lead to the genomic disorganization and changes in transcriptional regulation we observe in HGPS fibroblasts. We analyzed gene expression of primary fibroblasts of a Hutchinson-Gilford progeria syndrome patient, a healthy age-matched control, and the patient's healthy father using the Affymetrix GeneChip Human Genome U133 Plus 2.0 Array platform. Arrays were filtered and normalized using RMA. Two replicates were performed.

2012-10-30 | E-GEOD-41751 | biostudies-arrayexpress

Comparison of Hutchinson–Gilford Progeria Syndrome fibroblast cell lines to control fibroblast cell lines

Project description:Hutchinson–Gilford progeria syndrome (HGPS) is a rare genetic disease with widespread phenotypic features resembling premature aging. HGPS was recently shown to be caused by dominant mutations in the LMNA gene, resulting in the in-frame deletion of 50 amino acids near the carboxyl terminus of the encoded lamin A protein. Children with this disease typically succumb to myocardial infarction or stroke caused by severe atherosclerosis at an average age of 13 years. To elucidate further the molecular pathogenesis of this disease, we compared the gene expression patterns of three HGPS fibroblast cell lines heterozygous for the LMNA mutation with three normal, age-matched cell lines. We defined a set of 361 genes (1.1% of the approximately 33 000 genes analyzed) that showed at least a 2-fold, statistically significant change. The most prominent categories encode transcription factors and extracellular matrix proteins, many of which are known to function in the tissues severely affected in HGPS. The most affected gene, MEOX2/GAX, is a homeobox transcription factor implicated as a negative regulator of mesodermal tissue proliferation. Thus, at the gene expression level, HGPS shows the hallmarks of a developmental disorder affecting mesodermal and mesenchymal cell lineages. The identification of a large number of genes implicated in atherosclerosis is especially valuable, because it provides clues to pathological processes that can now be investigated in HGPS patients or animal models. Keywords: microarrays, Hutchinson–Gilford progeria syndrome, HGPS

2005-12-31 | GSE3860 | GEO

Recapitulation of human premature aging by using iPSCs from Hutchinson-Gilford progeria syndrome

2011-03-14 | GSE24487 | GEO

Transcription profiling of primary fibroblasts from a family with autosomal recessive Hutchinson-Gilford Progeria Syndrome

Project description:Hutchinson-Gilford progeria syndrome (HGPS) is a genetic disorder displaying features reminiscent of premature senescence caused by germline mutations in the LMNA gene encoding lamin A and C, essential components of the nuclear lamina. By studying a family with homozygous LMNA mutation (K542N), we showed that HGPS can also be caused by mutations affecting both isoforms, lamin A and C (J Med Genet 2004;41:609M-^V614). With the aim to elucidate the molecular mechanisms underlying the pathogenesis of lamin A/C-related (hereditary) HGPS, we investigated primary cultured skin fibroblasts from affected homozygous K542N carriers (n=3), healthy heterozygotes (n=3), and controls (n=3) for differences in global gene expression using GeneChip Human Genome U133 Plus 2.0 arrays (Affymetrix UK Ltd.).

2011-06-27 | E-MEXP-3097 | biostudies-arrayexpress

Single-Dose CRISPR/Cas9 Therapy Extends Lifespan of Mice with Hutchinson-Gilford Progeria Syndrome

Project description:Hutchinson-Gilford Progeria Syndrome (HGPS) is a rare lethal genetic disorder characterized with symptoms reminiscent of accelerated aging. The major underlying genetic cause is a substitution mutation in the gene coding for lamin A, causing the production of a toxic isoform called progerin. Here we show the RNA sequencing analyses performed on primary mouse fibroblasts of different genotypes (in terms of Progeria; Cas9 background) treated with Cas9 guide RNAs targeting Lmna/Progerin. The mouse genetic background in (1) Pro/Pro;Cas9/+: homozygous for Progeria and heterozygous for transgenic Cas9 The mouse genetic background in (2) Pro/+; +/+: heterozygous for Progeria and no transgenic Cas9 (wild type) The mouse genetic background in (3) +/+;Cas9/+: no Progeria (wild type) and heterozygous for transgenic Cas9

2019-02-15 | GSE122865 | GEO

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