نتایج جستجو برای: senescence
تعداد نتایج: 19206 فیلتر نتایج به سال:
Small Auxin Up RNA genes (SAURs) are early auxin-responsive genes, but whether any of them are involved in leaf senescence is not known. Auxin, on the other hand, has been shown to have a role in leaf senescence. Some of the external application experiments indicated that auxin can inhibit leaf senescence, whereas other experiments indicated that auxin can promote leaf senescence. Here, we repo...
Downstream factors that regulate the decision between senescence and cell death have not been elucidated. Cells undergo senescence through three pathways, replicative senescence (RS), stress-induced premature senescence (SIPS) and oncogene-induced senescence. Recent studies suggest that the ataxia telangiectasia mutant (ATM) kinase is not only a key protein mediating cellular responses to DNA d...
Activation of hepatic stellate cells (HSC) leads to initiation and progression fibrosis. HSC senescence is inversely correlated with proliferation activation. Therefore, induction may be a strategy treat Coumarin-derivatives like esculetin have been suggested inhibit fibrogenic cells. in this study we aimed investigate the effect on activation . Primary rat were used all experiments. Real-time ...
Abstract Thioredoxins are invoved in redox regulation of many cellular processes. In this study the role of NADP+-Thioredoxin reductase C (NTRC) in the control of leaf senescence was investigated by biochemical characterization of Arabidopsis ntrc mutants. Forty days old wild type and two ntrc mutant lines were incubated either under normal dark-light or continous darkness regimes for 6 days as...
Hydrogen sulphide (H2S), as a signalling molecule, regulates the process of plant growth and development. H2S is involved in establishment legume rhizobial symbiotic relationship, but little known about role during nodule senescence. We studied function senescence Glycine max-Sinorhizobium fredii system. Physiological biochemical methods were used to modulate nitrogen fixation, structure, senes...
The accumulation of senescent disc cells in degenerative intervertebral disc (IVD) suggests the detrimental roles of cell senescence in the pathogenesis of intervertebral disc degeneration (IDD). Disc cell senescence decreased the number of functional cells in IVD. Moreover, the senescent disc cells were supposed to accelerate the process of IDD via their aberrant paracrine effects by which sen...
Cellular senescence is reportedly involved in the pathogenesis of chronic obstructive pulmonary disease (COPD). We previously showed that 27-hydroxycholesterol (27-OHC) is elevated in the airways of COPD patients compared with those in healthy subjects. The aim of this study was to investigate whether lung fibroblasts of COPD patients are senescent and to determine the effects of 27-OHC on sene...
Cellular senescence, a state of permanent cell cycle arrest in response to endogenous and exogenous stimuli, triggers series gradual alterations structure, metabolism, function, as well inflammatory gene expression that nurtures low-grade proinflammatory milieu human tissue. A growing body evidence indicates an accumulation senescent neurons blood vessels stress aging the retina. Prolonged cell...
Cellular senescence disables proliferation in damaged cells, and it is relevant for cancer and aging. Here, we show that senescence occurs during mammalian embryonic development at multiple locations, including the mesonephros and the endolymphatic sac of the inner ear, which we have analyzed in detail. Mechanistically, senescence in both structures is strictly dependent on p21, but independent...
Hematologic malignancies are typically associated with leukemogenic fusion proteins, which are required to maintain the oncogenic state. Previous studies have shown that certain oncogenes that promote solid tumors, such as RAS and BRAF, can induce senescence in primary cells, which is thought to provide a barrier to tumorigenesis. In these cases, the activated oncogene elicits a DNA damage resp...
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