Gene expression profiling of stress-induced senescence and paracrine senecence in human hepatocytes
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PROVIDER: PRJNA864038 | ENA |
REPOSITORIES: ENA
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Project description:Hepatocytes undergo senescence during development and progression of NAFLD. In order to better understand the phenotype of these senescent cells we generated an in vitro model of stress-induced senescence in IHH cells. To further understand the dynamic regulation of paracrine senescence, IHH cells were exposed to conditioned medium generated by an inducible model of stress-induced senescence.
2024-09-01 | GSE210140 | GEO
Project description:Senescence can be transmitted in a paracrine way from cells undergoing Oncogene Induced Senescence (OIS) to naM-CM-/ve normal cells. We define this phenomenon as M-bM-^@M-^\paracrine senescenceM-bM-^@M-^] We used microarrays to compare the trancriptome of cells undergoing paracrine senescence to the transcriptome of cells suffering OIS to unveil the common signatures defining both events and the similarities between them IMR90 cells were co-cultured with IMR90 ER:RAS undergoing OIS or IMR90-Vector control cells using 0.2 M-NM-<m pore transwell (anopore) to allow communication of soluble factors but physical separation of the two cell populations. The total mRNA of IMR90, IMR90 ER:RAS or IMR90 cells cultured in Transwells together with IMR90 vector or IMR90 ER:RAS cells during 7 days in the presence of 200 nM 4OHT and 0.5 % FBS was extracted and hybridized on Affymetrix microarrays to compare paracrine senescence to OIS.
2013-06-13 | E-GEOD-41318 | biostudies-arrayexpress
Project description:Senescence can be transmitted in a paracrine way from cells undergoing Oncogene Induced Senescence (OIS) to naïve normal cells. We define this phenomenon as “paracrine senescence” We used microarrays to compare the trancriptome of cells undergoing paracrine senescence to the transcriptome of cells suffering OIS to unveil the common signatures defining both events and the similarities between them
2013-06-13 | GSE41318 | GEO
Project description:Cellular senescence can be transmitted to neighbouring cells in a paracrine manner through different mechanisms, including soluble factors released by senescent cells. To understand the dynamic regulation of paracrine senescence, here we investigated gene expression profiles in normal human fibroblasts (IMR90) exposed to conditioned medium generated by an inducible model of fibroblast Oncogene-Induced Senescence (IMR90-ER:RAS) at different time points after induction of senescence.
2022-04-05 | GSE139563 | GEO
Project description:Gene expression profiling of dynamic paracrine senescence in human fibroblasts
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Project description:Senescence, the irreversible cell cycle arrest of damaged cells, is accompanied by a deleterious pro-inflammatory senescence-associated secretory phenotype (SASP). Senescence and the SASP are major factors in aging, cancer, and degenerative diseases, and interfere with the expansion of adult cells in vitro, yet little is known about how to counteract their induction and deleterious effects. Paracrine signals are increasingly recognized as important senescence triggers and understanding their regulation and mode of action may provide novel opportunities to reduce senescence-induced inflammation and improve cell-based therapies. Here, we show that the signalling protein WNT3A counteracts senescence in cultured human adult multipotent stromal cells (MSCs) by limiting paracrine senescence. We find that entry into senescence in a small subpopulation of MSCs triggers a secretome that causes a feed-forward signalling cascade that with increasing speed induces healthy cells into senescence. WNT signals interrupt this cascade by repressing cytokines that mediate this induction of senescence. Inhibition of those mediators by interference with NF-kB or interleukin 6 signalling reduced paracrine senescence in absence of WNT3A and promoted the expansion of MSCs. Our work reveals how WNT signals can antagonize senescence and has relevance not only for expansion of adult cells but can also provide new insights into senescence-associated inflammatory and degenerative diseases. // The RNAseq data in particular focusses on the transcriptome changes in MSCs occuring in vitro culture over four passages in presence or absence of growth factors WNT3A and FGF2.
2021-11-24 | GSE152112 | GEO
Project description:The burden of senescent hepatocytes correlates with MASLD severity but mechanisms driving senescence, and how it exacerbates MASLD are poorly understood. Hepatocytes become senescent when Smoothened (Smo) is deleted to disrupt Hedgehog signaling. We aimed to determine if the secretomes of Smo-deficient hepatocytes perpetuate senescence to drive MASLD progression. RNA seq analysis confirmed that hepatocyte populations of MASLD livers are depleted of Smo(+) cells and enriched with senescent cells. When fed CDA-HFD, Smo(-) mice had lower antioxidant markers and developed worse DNA damage, senescence, MASH and liver fibrosis than Smo(+) mice. Sera and hepatocyte-conditioned medium from Smo(-) mice were depleted of thymidine phosphorylase (TP), a protein that maintains mitochondrial fitness. Treating Smo(-) hepatocytes with TP reduced senescence and lipotoxicity; inhibiting TP in Smo(+) hepatocytes had the opposite effects and exacerbated hepatocyte senescence, MASH, and fibrosis in CDA-HFD-fed mice.Therefore, we found that inhibiting Hedgehog signaling in hepatocytes promotes MASLD by suppressing hepatocyte production of proteins that prevent lipotoxicity and senescence.
2024-10-01 | GSE273523 | GEO
Project description:Human cytomegalovirus infection triggers a paracrine senescence loop in renal epithelial cells.
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Project description:WNT signals inhibit paracrine induction of senescence in human multipotent stromal cells
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Project description:Purpose: Cellular senescence is a cell stress response resulting in permanent growth arrest and the production of an altered pro-inflammatory secretory profile known as the senescecnce-associated secretory phenotype (SASP). The induction of senescence in astrocytes, a cell type responsible for maintaining homeostasis within the central nervous system (CNS) and responding to CNS insults, has been implicated in neurodegenerative disease. However, little is known about the senescent transcriptome in CNS-derived cell types including astrocytes. Methods: To better understand senescence-associated gene expression changes in astrocytes, we investigated global changes in the astrocyte transcriptome using RNA-seq following the induction of oxidative stress-induced senescence with hydrogen peroxide. Results: During senescence, we find evidence of a loss of brain expressed transcripts involved in diverse CNS processes including neuronal differentiation and development, gliogenesis, axonogenesis, and learning and memory as well as a loss of transcripts involved in MHC class II antigen processing and presentation. In addition, we find evidence for induction of the senescent phenotype including a loss of transcripts involved in cell division and an increase in the mRNA level of inflammatory mediators suggestive of a SASP. Conclusions: Overall, our findings suggest a loss of differentiated function in senescent astrocytes and a gain in neuroinflammatory function as part of the SASP as a potential mechanisms for dysfunction in the aging brain.
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