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Sayfa 1 itibaren 192 Sonuçlar
Polyamine depletion inhibits NF-kappaB binding to DNA and interleukin-8 production in human chondrocytes stimulated by tumor necrosis factor-alpha.
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The activation of the NF-kappaB pathway by pro-inflammatory cytokines, such as tumor necrosis factor-alpha (TNFalpha), can be an important contributor for the re-programming of chondrocyte gene expression, thereby making it a therapeutic target in articular diseases. To search for new approaches to
Polyamines, NO and cGMP mediate stimulation of DNA synthesis by tumor necrosis factor and lipopolysaccharide in chick embryo cardiomyocytes.
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OBJECTIVE
We have recently shown that tumor necrosis factor-alpha (TNFalpha) and lipopolysaccharide (LPS) stimulate DNA synthesis in chick embryo cardiomyocytes (CMs). The aim of the present research was to investigate the pathways involved in this mitogenic response.
METHODS
CMs were isolated from
Polyamine depletion inhibits apoptosis following blocking of survival pathways in human chondrocytes stimulated by tumor necrosis factor-alpha.
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Chondrocyte apoptosis can be an important contributor to cartilage degeneration, thereby making it a potential therapeutic target in articular diseases. To search for new approaches to limit chondrocytic cell death, we investigated the requirement of polyamines for apoptosis favored by tumor
Apoptotic response to 5-fluorouracil treatment is mediated by reduced polyamines, non-autocrine Fas ligand and induced tumor necrosis factor receptor 2.
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5-fluorouracil (5-FU) is the major chemotherapeutic agent for treatment of colorectal carcinoma, but the molecular mechanisms of response and resistance are not understood completely. We therefore studied the 5-FU dose response and time course of gene expression transcriptome changes in colon
Polyamine depletion switches the form of 2-deoxy-D-ribose-induced cell death from apoptosis to necrosis in HL-60 cells.
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Our previous studies demonstrated that intracellular polyamine depletion blocked HL-60 cell apoptosis triggered by exposure to 2-deoxy-d-ribose (dRib). Here, we have characterized the intracellular events underlying the apoptotic effects of dRib and the involvement of polyamines in these effects.
Inhibitors of polyamine biosynthesis block tumor necrosis factor-induced activation of macrophages.
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The activation of polyamine biosynthesis, dependent on increased gene expression of ornithine decarboxylase, has been found to play an important role in the control of cell proliferation and differentiation. In this report it has been found that accumulation of ornithine decarboxylase mRNA also
Polyamine levels in sarcoma-bearing rats in relation to growth and necrosis of the tumour cells.
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Putrescine (PU), spermidine (SPD) and spermine (SPM) levels in blood serum of MC Sa 1828 P-bearing rats have been studied in relation to tumour weight and the histological picture. A statistically significant increase of PU and SPD was found in the course of tumour development. Decrease in the level
Different prooxidant levels stimulate growth, trigger apoptosis, or produce necrosis of insulin-secreting RINm5F cells. The role of intracellular polyamines.
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Increasing concentrations (1-100 microM) of the redox cycling quinone, 2,3-dimethoxy-1,4-naphthoquinone (DMNQ), stimulated growth, triggered apoptosis, or caused necrosis of pancreatic RINm5F cells, depending on the dose and duration of the exposure. Following the exposure of RINm5F cells to 10
An inhibitor of polyamine biosynthesis impairs human polymorphonuclear leukocyte priming by tumor necrosis factor alpha.
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TNF primes polymorphonuclear leukocytes (PMNs) for enhanced oxidative and secretory activity and directly induces adhesion and IL-1 beta expression. Previous reports suggest that polyamine biosynthesis by ornithine decarboxylase (ODC) has an essential role in macrophage activation by TNF. In the
Radiation brain injury is reduced by the polyamine inhibitor alpha-difluoromethylornithine.
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Alpha-difluoromethylornithine (DFMO) was used to reduce 125I-induced brain injury in normal beagle dogs. Different DFMO doses and administration schedules were used to determine if the reduction in brain injury was dependent on dose and/or dependent upon when the drug was administered relative to
Whole body energy expenditure protein breakdown and polyamine excretion during high dose treatment with interleukin-2 and interferon-alpha.
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OBJECTIVE
To correlate changes in whole body resting energy expenditure and protein breakdown with the production of stress hormones, excretion of polyamines, and circulating concentrations of interleukin-1 (IL-1), interleukin-6 (IL-6), and tumour necrosis factor-alpha (TNF-alpha), in patients
Effects of Polyamines on TNFalpha- or Tamoxifen-induced Apoptosis in Human Breast Cancer Cells.
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OBJECTIVE
To investigate the effects of polyamines on tumor necrosis factor alpha (TNFalpha)-or tamoxifen (TAM)-induced apoptosis in estrogen receptor (ER)-positive MCF- 7 and ER-negative MDA-MB-231 human breast cancer cells.
METHODS
Cell viability was assessed by using MTT assay. Reactive oxygen
Intrahepatic polyamine levels during rat liver carcinogenesis induced by N-2-fluorenylacetamide.
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During a period of 200 days, the chronological changes of polyamine levels (putrescine, spermidine and spermine) were observed in the liver of adult female Sprague Dawley rats submitted to hepatocarcinogenesis by N-2-fluorenylacetamide (FAA). Three groups of 70 rats each were used: (1) Control 1:
Polyamine catabolism in relation to trypsin activation and apoptosis in experimental acute pancreatitis.
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BACKGROUND
Overinduced polyamine catabolism (PC) in a transgenic rat model has been suggested to be a mediator of trypsin activation which is important in acinar cell necrosis. PC has also been observed in experimental taurodeoxycholate pancreatitis. We hypothesized that PC may be a mediator of
Suppression of TNF-alpha production by S-adenosylmethionine in human mononuclear leukocytes is not mediated by polyamines.
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Endotoxin-induced cytokine production is an important mechanism in the development of several types of liver damage. Methionine, some of its precursors and metabolites were reported to have protective effects against such injury. The aim of this study was to investigate whether methionine, its
Bilim tarafından desteklenen en eksiksiz şifalı otlar veritabanı
- 55 dilde çalışır
- Bilim destekli bitkisel kürler
- Görüntüye göre bitki tanıma
- Etkileşimli GPS haritası - bölgedeki bitkileri etiketleyin (yakında)
- Aramanızla ilgili bilimsel yayınları okuyun
- Şifalı bitkileri etkilerine göre arayın
- İlgi alanlarınızı düzenleyin ve haber araştırmaları, klinik denemeler ve patentlerle güncel kalın
Bir belirti veya hastalık yazın ve yardımcı olabilecek bitkiler hakkında bilgi edinin, bir bitki yazın ve karşı kullanıldığı hastalıkları ve semptomları görün.
* Tüm bilgiler yayınlanmış bilimsel araştırmalara dayanmaktadır
