Abstract:
:Hyperglycemia and oxidative stress are the primary stressors that elicit mitochondria specific cell stress in diabetes. Here we hypothesized that elevated level of ROS in high glucose (HG) environment, trigger mitochondrial stress by damaging mitochondrial DNA (mtDNA), altering inflammatory mediators, and neurodegenerative markers via stress signalling pathway in retinal ganglion cells (RGC-5). Mechanistically, our findings illustrated that the HG environment increases the ROS production in retinal cells leading to the disruption of antioxidant defence mechanism, and altering mitochondrial machinery such as an increase in loss of mitochondrial membrane potential (ΔΨm), increase in mitochondrial mass, and increase in mtDNA fragmentation. Furthermore, fragmented mtDNA escape from mitochondria into the cytosol, where it engaged with cyclic GMP-AMP synthase (cGAS) and stimulator of IFN gene (STING) phosphorylation and activate interferon regulatory factor 3 (IRF3) via ERK1/2-Akt-tuberin-mTOR dependent pathways. Our results further indicate that siRNA-mediated gene silencing of tuberin suppresses the strong downregulation of tuberin-mTOR-IRF3 activation. HG environment resulted in activation of IRF3, coinciding with the increased expression of inflammatory mediators and neurodegenerative markers. Pre-treatment of N-acetyl-l-cysteine (NAC) or ERK1/2 or phosphoinositide3-kinase (PI3-K)/Akt inhibitors in RGC-5 cells significantly reduced the HG-induced IRF3 expression and declined the expression of neurodegenerative markers. Collectively, our results demonstrates that HG-induced over production of ROS, disrupts the antioxidant defence mechanism and mitochondrial dysfunction, leading to alterations of inflammatory mediators and neurodegenerative markers through the ERK1/2-Akt-tuberin-mTOR dependent signalling pathway in RGC-5 cells.
journal_name
Life Scijournal_title
Life sciencesauthors
Pal S,Rao GN,Pal Adoi
10.1016/j.lfs.2020.117914subject
Has Abstractpub_date
2020-09-01 00:00:00pages
117914eissn
0024-3205issn
1879-0631pii
S0024-3205(20)30664-0journal_volume
256pub_type
杂志文章相关文献
LIFE SCIENCES文献大全abstract::Antroduodenal myoelectric activity was recorded in conscious sheep by electrodes chronically implanted in the muscular wall. Furthermore, plasma immunoreactive (i.r.) motilin, somatostatin and bombesin concentrations were determined by RIA. The intravenous infusion of somatostatin (20 ng/kg/min), bombesin (10 ng/kg/mi...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(96)00209-3
更新日期:1996-01-01 00:00:00
abstract::The renal hemodynamic and tubular effects of ANF were investigated using the Sperber technique in chickens. This technique takes advantage of the unique portal circulation of the avian kidney and permits direct access to the renal peritubular space independent of renal arterial blood flow and glomerular filtration. In...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(87)90309-2
更新日期:1987-03-09 00:00:00
abstract:AIMS:Peptides and a dysregulated immune system play a role in the pathophysiology of autism. Dysfunctions in prolyl endopeptidase (PEP) and dipeptidyl peptidase IV (DPP-IV) may underpin both the peptidergic and immune alterations in autism. The aims of this study are to: (i) delineate serum PEP and DPP-IV enzyme activi...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2015.07.003
更新日期:2015-09-01 00:00:00
abstract::Synthetic human pancreatic Growth Hormone-Releasing Factor (hpGRF) elevated the plasma concentration of growth hormone (GH) in young and adult domestic fowl. This in vivo effect of hpGRF appeared to be largely similar for both the 32 amino-acid (hpGRF 1-32) or 40 amino-acid (hpGRF 1-40) polypeptide, although the effec...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(84)90083-3
更新日期:1984-03-19 00:00:00
abstract::The validity of a photoelectric method for continuous cerebral blood volume (CBV) measurement was tested and modified for the rat's brain. A new way of introducing a miniature light source between the two hemispheres and fixing a light sensitive silicone blue cell to the outer surface of the parietal bone was develope...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(86)90163-3
更新日期:1986-11-03 00:00:00
abstract::The effects of environmental cues explicitly paired or unpaired with pentobarbital on the thermic effects of pentobarbital and amphetamine were investigated. Rats received 19 injections of pentobarbital in a distinctive environment and were subsequently tested for the thermic effects of pentobarbital and amphetamine i...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(84)90051-1
更新日期:1984-06-25 00:00:00
abstract::Nociceptin/orphanin FQ (=N/OFQ), the endogenous ligand of ORL1 receptor (=NOP), has been reported to induce, in rodents, after intracerebroventricular (i.c.v.) administration, anti-stress and anxiolytic effects. We have observed that the handling of mice followed by an i.c.v. injection of saline, induced a marked incr...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(02)02218-x
更新日期:2002-11-29 00:00:00
abstract::It has been suggested that the myocardial production of nitric oxide, as a consequence of expression of the inducible isoform of nitric oxide synthase (NOS), plays an important role in the pathophysiology of heart failure. We determined the net cardiac production of nitrogen oxides (NOx), as a measure of NOS activity,...
journal_title:Life sciences
pub_type: 临床试验,杂志文章
doi:10.1016/s0024-3205(98)00005-8
更新日期:1998-01-01 00:00:00
abstract::The aim of this work was to evaluate the effect of the antioxidant stobadine on ischemia/reperfusion-induced injury of the isolated rat heart. Experiments were performed according to Langendorff. Ischemia was induced by stop-flow lasting 30 minutes and the duration of repefusion was 30 minutes. Reperfusion of the isch...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(99)00450-6
更新日期:1999-01-01 00:00:00
abstract:AIMS:In animal models of neuropathic pain, the noradrenergic descending pain inhibitory pathways from the locus coeruleus (LC) may be suppressed. However, no study has investigated the correlation between noradrenaline (NA) release in the LC and efficacy of analgesics in rats with painful diabetic neuropathy. Using mic...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2013.04.015
更新日期:2013-06-21 00:00:00
abstract:AIMS:Bisphenol (BP)-A exposure can impair glucose and lipid metabolism. However, it is unclear whether this endocrine disruptor (ED) modulates these processes in postmenopause, a period with organic changes that increase the risk for metabolic diseases. Herein, we evaluated the effects of BPA exposure on adiposity, glu...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2020.118012
更新日期:2020-09-01 00:00:00
abstract::Using hot plate method, analgesia induced by noncatecholic phenylethylamines, phenethylamine, phenylethanolamine and amphetamine, was inhibited by naloxone, reserpine, apomorphine and p-chlorophenylalanine, while potentiated by haloperidol. These results suggest that phenylethylamines induced analgesia involves centra...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(82)90347-2
更新日期:1982-09-20 00:00:00
abstract::Although peripheral actions have been shown for the brain-gut peptide, motilin, its localization in the CNS of mammals suggests some physiological role at this site. In the present experiments intracerebroventricular or intrathecal, but not peripheral, administrations of motilin produced a dose-related and naloxone re...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(84)90043-2
更新日期:1984-06-25 00:00:00
abstract::Intestinal mucosa, bone marrow hematopoietic cells and brain have limited capacity for the de novo synthesis of nucleosides (NSs) and nucleotides (NTs). Whereas the role of dietary NS and NT in the former two tissues is known, it is not known in the brain. Therefore we studied the effect of dietary NS and NT mixture o...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(96)00526-7
更新日期:1996-01-01 00:00:00
abstract::Polyamines have been shown to relax several types of smooth muscle including vasculature. In the estrogen-treated uterus, uterine blood flow and polyamine levels in the uterus are increased. The relaxant effect of polyamines on blood vessels suggest that polyamines may act on uterine vasculature to cause uterine hyper...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(92)90446-v
更新日期:1992-01-01 00:00:00
abstract:AIMS:Asymmetric dimethylarginine (ADMA) is an endogenous competitive inhibitor of nitric oxide (NO) synthase, an enzyme responsible for the generation of NO. Plasma concentrations of ADMA increase in the elderly and in postmenopausal women. In fact, an elevated ADMA level is a risk factor of cardiovascular disease. Aer...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2014.05.003
更新日期:2014-07-11 00:00:00
abstract::Although lipid peroxidation of biological samples may be assessed by different chemical and physical methods, those based on the measurement of malondialdehyde formed from the breakdown of endoperoxides during the last stages of the oxidation of a polyunsaturated fatty acid, appear as the most widely used. Among the v...
journal_title:Life sciences
pub_type: 杂志文章,评审
doi:10.1016/0024-3205(91)90550-u
更新日期:1991-01-01 00:00:00
abstract::Repeated intermittent administration of amphetamine in mice caused reverse tolerance to 5-hydroxy-L-tryptophan (5-HTP)-induced head twitch, as well as to amphetamine-induced stereotypy. The repeated administration of 5-HTP alone also resulted in reverse tolerance in the head-twitch test. Daily pretreatment with halope...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(90)90141-d
更新日期:1990-01-01 00:00:00
abstract::The microscopic localization of angiotensin II receptors in the rat brainstem has been accomplished utilizing in vitro receptor autoradiographic techniques. These receptors are highly localized to discrete nuclear regions of the brainstem. Significant densities of autoradiographic grains, indicating the presence of sp...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(84)90611-8
更新日期:1984-04-16 00:00:00
abstract:AIMS:Aristolochic acid (AA) nephrotoxicity is related to accumulation of methylglyoxal (MGO) and N(ε)-(carboxymethyl)lysine (CML) in the mouse kidney. We studied the activity of renal semicarbazide-sensitive amine oxidase (SSAO), a key enzyme involved in MGO generation, in AA-treated mice, and investigated nephroprotec...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2014.07.034
更新日期:2014-09-26 00:00:00
abstract::Physical exercise is known to increase oxygen consumption to compensate for enhanced ATP consumption and thus to induce oxidative stress in tissues. Our previous data indicate that training significantly increased the hydroxyl radical level in rat tissues after physical exercise, but reduced the basal level in aged ra...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(98)00468-8
更新日期:1998-01-01 00:00:00
abstract::This study examined the effect of nitric oxide (NO) on the cytosolic free Ca(2+) concentration ([Ca(2+)](c)) of alpha-cells isolated from rat pancreatic islets. When extracellular glucose was reduced from 7 to 0 mM, about half of the alpha-cells displayed [Ca(2+)](c) oscillations. Nicardipine, a Ca(2+) channel blocker...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(02)01608-9
更新日期:2002-05-24 00:00:00
abstract::The temporal relationship of changes in cAMP and cGMP to oocyte maturation was examined in proestrous hamsters (day 4). The first series of experiments showed, in normal cycling hamsters, an increase in cAMP and a decrease in cGMP at 1400 h shortly after the rise in LH with oocyte maturation beginning at 1800 h. When ...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(83)90726-9
更新日期:1983-10-24 00:00:00
abstract:OBJECTIVE:Metformin, introduced in 1957, is widely used as an anti-diabetic drug and has considerable benefits in cardiovascular disease reportedly, dependent or independent on its glucose-lowering effects. Aim of this study was to investigate the effect of metformin on gap junction and the inducibility of AF. METHODS...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/j.lfs.2020.117759
更新日期:2020-08-01 00:00:00
abstract::Hydrolysis of fragments of the C-terminal and mid-portions of parathyroid hormone (PTH) by a phosphoramidon-insensitive metallo-endopeptidase, previously purified by us from the microvillar membranes of rat kidney, and by the microvillar membranes of rat kidney themselves were investigated using a reverse-phase HPLC, ...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(94)00795-0
更新日期:1994-01-01 00:00:00
abstract:AIMS:Brain injuries based on their causes are divided into two categories, TBI and NTBI. TBI is caused by damages such as head injury, but non-physical injury causes NTBI. Prolactin is one of the blood factors that increase during brain injury. It has been assumed to play a regenerative role in post-injury recovery. M...
journal_title:Life sciences
pub_type: 杂志文章,评审
doi:10.1016/j.lfs.2020.118547
更新日期:2020-12-15 00:00:00
abstract::Both in men and rats, most of the ethanol ingested at a low dose is metabolized before it reaches the systemic circulation. Oxidation of ethanol (mainly in the stomach) accounts for the bulk of this effect. This "first pass" metabolism (FPM) may be viewed as a barrier which protects against the systemic toxicity of et...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(85)90470-9
更新日期:1985-08-12 00:00:00
abstract::Species-related specific differences in the pharmacological profile of vasopressin V1a receptors have been reported. Thus, the aim of the present study was to identify a vascular preparation of human origin expressing V1a receptors. Vasopressin was found to contract human gastric artery strips without endothelium with...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(96)00635-2
更新日期:1997-01-01 00:00:00
abstract::The O2 affinity of "stripped" (cofactor-free) hemoglobin (Hb) of the elasmobranch, Squalus acanthias is decreased by ATP, the main erythrocytic phosphate cofactor but increased by urea at physiological concentration. When both compounds are present, as in life, urea decreases the ATP sensitivity, indicating that previ...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/0024-3205(83)90105-4
更新日期:1983-05-02 00:00:00
abstract::The localization of vasoactive intestinal polypeptide (VIP) in the male genitourinary tract was investigated in the rabbit and man by means of radioimmunoassay and immunohistochemistry. In addition, the in vitro effect of VIP upon penile smooth muscle from man, the Vervet monkey, and the rabbit was investigated. Signi...
journal_title:Life sciences
pub_type: 杂志文章
doi:10.1016/s0024-3205(83)80013-7
更新日期:1983-07-25 00:00:00