Similar Datasets
Project description:Assessing the plasticity of the senescent phenotype
| PRJNA699010 | ENA
Project description:We observe preferential accumulation of gH2AX at chromosome ends upon irradiation comparison of quiescent vs senescent human fibroblasts
2012-03-13 | E-GEOD-35884 | biostudies-arrayexpress
Project description:We characterized senescent alveolar epithelial cells in an effort to better understand how these cells contribute to lung remodeling and fibrosis. The transcriptional profiles of several different types of senescent lung epithelial cells was evaluated using various induction methods in order to better understand core characteristics associated with the senescent program in epithelial cells of the lung.
2021-03-08 | GSE166034 | GEO
Project description:Malignant melanoma might develop from melanocytic nevi in which the growth-arrested state has been broken. We analyzed the gene expression of young and senescent human melanocytes in culture. In this dataset we include the expression data of young and senescent human melanocytes.
2019-06-30 | GSE83922 | GEO
Project description:Accumulation of senescent dermal fibroblasts drives skin aging, impairing the integrity of the extracellular matrix (ECM) and the function of neighbouring cells. One of strategies to manipulate cell senescence include the reactivation of proliferation. Here, a data independent mass spectrometry based proteomic approach has been used to evaluate the effect of an hydrophilic Oenothera biennis cell culture extract (ObHEx) on senescent human dermal fibroblasts. It has been shown that the extract was able to affect the levels of 18 proteins which cluster together and point to mitosis pathways. Indeed the treatment with ObHEx increase the expression of CDK1, replicative helicase complex (MCM2, MCM3, MCM4, MCM5, MCM6, MCM7), condensin I complex (NCAPD2, NCAPH, NCAPG, SMC4, SMC2) and other proteins related to kinetochore (KNTC1, NUF2, TRIP13). This strongly suggests that ObHEx could restore the proliferation of senescent fibroblasts.
2023-03-10 | PXD034222 | Pride
Project description:The presence of senescent cells in the aging/degenerating human disc is now well-recognized. Senescent cells are viable, cannot divide, remain metabolically active and accumulate within the disc over time. Molecular analysis of senescent cells in tissue, however, offers a special challenge since there are no cell surface markers for senescence which would let one use fluorescence-activated cell sorting as a method for separating out senescent cells. Here we use a novel experimental design using laser capture microdissection to selectively separately harvest senescent and non-senescent annulus cells in paraffin-embedded tissue, and then compare their gene expression with microarray analysis. An initial in vitro study using cultured human annulus cells was first performed to test whether there was any difference in identification of senescent cells using the accepted histochemical methodology vs. the immunofluoresent identification of cells positive for senescence-associated-ß-galactosidase in control cells and cells induced into stress-induced premature senescence via hydrogen peroxide exposure. No statistically significant difference was found between the 2 methods. Laser capture microdissection was used to separately harvest senescent and non-senescent cells from 11 human annulus specimens, and microarray analysis was used to determine gene expression levels. Genes with established relationships to senescence were found to be significantly upregulated in senescent cells vs. non-senescent cells. Additional genes related to cytokines, cell proliferation, and other cell processes were also identified. Disc Tissue samples were obtained from surgical disc procedures performed on patients with herniated discs and degenerative disc disease. Tissue was fixed and paraffin embedded. Standard laser capture microdissection (LCM) techniques were used to collect senescent cells. Remaining non-senescent cells were scraped from the histology slide. Total RNA was isolated and analyzed via mircoarray. Gene expression from senescent cells was compared to non-senescent cells. Eight histological samples were used to obtain both senescent and non-senescent cells. From an additional 3 samples, only senescent cells were harvested.
2009-07-15 | E-GEOD-17077 | biostudies-arrayexpress
Project description:Senescent cells accumulate in tissues over time, favoring the onset and progression of multiple age-related diseases. The senescence-associated secretory phenotype (SASP) is considered the main pathological feature of senescent cells, however, little is known about the mechanism of secretion of SASP factors. Here, we report that human senescent cells present higher levels of the two main types of authophagy, namely macroautophagy (MA) and chaperone-mediated autophagy (CMA), together with an increase in the transcription factor TFEB and in lysosomal mass. Proteomic analyses showed profound and widespread changes in the composition of lysosomal substrates in both CMA- and MA-derived lysosomes. Notably, some proteins previously identified as plasma biomarkers of aging in humans are highly enriched in the lysosomes of senescent cells, as it is the case of cathepsin D (CTSD). Moreover, we found that senescent cells have the ability to perform lysosomal exocytosis in a RAB27A-dependent manner and this is the main route for the secretion of multiple cytokines (such as CCL2, CCL3, CXCL12), the protease inhibitor SERPINE1 and protease CTSD. We conclude that lysosomes are hyperactive in senescent cells, display an altered pattern of constitutive proteins and lysosomal substrates, and undergo exocytosis contributing to the SAS
2022-08-29 | PXD022492 | Pride
Project description:Senescent cells secrete many molecules, which contribute to the prevention of cancer progression. We induced MSC senescence by oxidative stress, DNA damage, and replicative exhaustion. The first two are considered inducers of acute senescence while extensive proliferation triggers replicative senescence also named chronic senescence. We cultivated cancer cells in the presence of acute and chronic senescent MSC conditioned media and evaluated proliferation, DNA damage, apoptosis and senescence.
2018-10-25 | PXD003018 | Pride
Project description:We utilized whole genome sequencing of mRNA (RNA-seq) to understand the extent to which the senescence-associated secretory phenotype is regulated by p38MAPK Examination of replicates of young, senescent or p38MAPK-inhibited senescent BJ human foreskin fibroblasts.
2014-04-01 | E-GEOD-56293 | biostudies-arrayexpress
Project description:Myeloma-modified adipocytes exhibit a senescent-associated secretory phenotype
| PRJNA589536 | ENA