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Results 201 - 250 of 1175
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Pratheeshkumar Poyil - - 2011
Nomilin is a triterpenoid present in common edible citrus fruits with putative anticancer properties. In this study, the authors investigated the antimetastatic potential of nomilin and its possible mechanism of action. Metastasis was induced in C57BL/6 mice through the lateral tail vein using highly metastatic B16F-10 melanoma cells. Administration of ...
Khandelwal N - - 2011
In a number of contexts, and particularly in response to cellular stress, stimulation of the NF-kappaB (NF-κB) pathway promotes apoptosis. One mechanism underlying this pro-apoptotic activity is nucleolar sequestration of RelA, which is reported to cause cell death by repressing NF-κB-driven transcription. Here, we identify a novel and distinct nucleolar ...
Charvet Céline C Institute of Molecular Medicine and Cell Research, Albert Ludwigs University Freiburg, Stefan Meier Strasse 17, 79104 Freiburg, - - 2011
Activation of p53 by DNA damage results in either cell-cycle arrest, allowing DNA repair and cell survival, or induction of apoptosis. As these opposite outcomes are both mediated by p53 stabilization, additional mechanisms to determine this decision must exist. Here, we show that glycogen synthase kinase-3 (GSK-3) is required for ...
Filipović D - - 2011
Mitochondria are central integrators and transducers of proapoptotic signals for neuronal apoptosis. The tumor suppressor protein p53 can trigger apoptosis independently of its transcriptional activity, through subcellular translocation of cytochrome c and caspase activation. To define better the proapoptotic role of p53 under various stress conditions, we investigated the protein ...
Pepper C - - 2011
Objectives:  Non-steroidal anti-inflammatory drugs have been shown to induce apoptosis in primary B-cell chronic lymphocytic leukaemia (CLL) cells, but the molecular mechanisms that underpin this observation have not been fully elucidated. Here, we have analysed the effect two novel aspirin analogues, 2-hydroxy benzoate zinc (2HBZ) and 4-hydroxy benzoate zinc (4HBZ), ...
Shi Taiping - - 2011
In the present study, we characterized the function of HS1-binding protein 3 (HS1BP3), which is mutated in essential tremor and may be involved in lymphocyte activation. We found that HS1BP3 localized to the mitochondria and endoplasmic reticulum partially. Overexpression of HS1BP3 induced apoptosis in HEK293T and HeLa cell lines. When ...
Kumar Rahul - - 2011
The mycotoxin, citrinin (CTN), is a contaminant of various food and feed materials. Several in vivo and in vitro studies have demonstrated that CTN has broad toxicity spectra, however, dermal toxicity is not known. In the present investigation dermal exposure to CTN was undertaken to study oxidative stress, DNA damage, ...
Yuan Zhongmin - - 2011
Cerebellar granular neurons (CGNs) undergo apoptosis when deprived of depolarizing concentrations of potassium, which coincides with the induction of the transcription factor E2F1, a key regulator of cell cycle. In this study, we examined the effects of E2F1 upregulation on the survival and death of CGNs isolated from C57 mice ...
Zhu Huaqing - - 2011
Aims: Free fatty acids induce apoptosis in cardiomyocytes, which is implicated in lipotoxic cardiomyopathy. However, the underlying mechanisms remain not fully understood. MiRNAs are non-coding smalls RNAs that control gene expression at the post-transcriptional levels. Dysregulated miRNAs have been involved in heart diseases. This study was to examine whether miR-195 ...
Dirisina Ramanarao - - 2011
Inflammatory bowel disease (IBD) is associated with increased apoptosis of intestinal epithelial cells (IECs). Mutations in the tumor suppressor p53 appear during early stages of progression from colitis to cancer. We investigated the role of p53 and its target, p53-upregulated modulator of apoptosis (PUMA), in inflammation-induced apoptosis of IECs. Apoptosis ...
Wang Liming - - 2011
To determine the role of Gq signaling and calcineurin (CN) activation in promoting apoptosis of glomerular podocytes, constitutively active Gq [Gq(+)] or CN [CN(+)] proteins were introduced into cultured podocytes using protein transduction by tagging the proteins with the transactivator of transcription peptide. To investigate the role of CN in ...
Li Tai - - 2011
Neuroblastoma is a solid tumor of the sympathetic nervous system accounting for up to 10% of pediatric cancers and 15% of cancer-related deaths. It is a useful system for investigation of stress signal-mediated apoptosis as a tumor suppression mechanism. In this study, we present evidence that p53 mediates DNA damaging ...
Kim Seong-Taeck - - 2011
The purpose of this study is to understand the mechanism of apoptosis occurring on a cultured human lens epithelial cell line after exposure to ultraviolet (UV) light. We intended to confirm the presence of cellular toxicity and apoptosis and to reveal the roles of p53, caspase 3 and NOXA in ...
Mathema Vivek Bhakta - - 2011
Parthenolide, a naturally occurring sesquiterpene lactone derived from feverfew (Tanacetum parthenium), exhibits exceptional anti-cancer and anti-inflammatory properties, making it a prominent candidate for further studies and drug development. In this review, we briefly investigate molecular events and cell-specific activities of this chemical in relation to cytochrome c, nuclear factor kappa-light-chain ...
van de Laar Lianne - - 2011
Despite the crucial function of dendritic cells (DC) in immunity, the molecular mechanisms regulating human DC development remain poorly defined. STAT5 regulates various hematopoietic lineages and is activated by GM-CSF, a critical cytokine in DC development. In this study, we investigated the role of STAT5 during differentiation of human CD34(+) ...
- - 2011
To the Editor: In their review article on hypoxia and inflammation, Eltzschig and Carmeliet (Feb. 17 issue)(1) were thorough in promoting the role of hypoxia-inducible transcription factor (HIF) and related mechanisms to regain homeostasis in hypoxic tissue environments. Although very exacting in its discussion, the review unfortunately failed to include ...
Wanderer Alan A - - 2011
To the Editor: In their review article on hypoxia and inflammation, Eltzschig and Carmeliet (Feb. 17 issue)(1) were thorough in promoting the role of hypoxia-inducible transcription factor (HIF) and related mechanisms to regain homeostasis in hypoxic tissue environments. Although very exacting in its discussion, the review unfortunately failed to include ...
Fagenholz Peter J - - 2011
To the Editor: In their review article on hypoxia and inflammation, Eltzschig and Carmeliet (Feb. 17 issue)(1) were thorough in promoting the role of hypoxia-inducible transcription factor (HIF) and related mechanisms to regain homeostasis in hypoxic tissue environments. Although very exacting in its discussion, the review unfortunately failed to include ...
Wilcox Ian - - 2011
To the Editor: In their review article on hypoxia and inflammation, Eltzschig and Carmeliet (Feb. 17 issue)(1) were thorough in promoting the role of hypoxia-inducible transcription factor (HIF) and related mechanisms to regain homeostasis in hypoxic tissue environments. Although very exacting in its discussion, the review unfortunately failed to include ...
Ahamed Maqusood - - 2011
Zinc oxide (ZnO) nanoparticles (NPs) are increasingly recognized for their utility in biological applications, including biosensor and medicine. However, little is known about the toxicity mechanisms of ZnO nanorods in human cells. This study was designed to investigate the possible mechanisms of apoptosis induced by ZnO nanorods in human alveolar ...
Kim Duk Hoon - - 2011
Nephrotoxicity is one of the important dose-limiting factors during cisplatin treatment. There is a growing body of evidence that activation of p53 has a critical role in cisplatin-induced renal apoptotic injury. The nicotinamide adenine dinucleotide-dependent protein deacetylase SIRT1 decreases apoptosis through deacetylating of p53, and resveratrol is known as an ...
Zhang Xiao-Peng - - 2011
The tumor suppressor p53 mainly induces cell cycle arrest/DNA repair or apoptosis in the DNA damage response. How to choose between these two outcomes is not fully understood. We proposed a four-module model of the p53 signaling network and associated the network dynamics with cellular outcomes after ionizing radiation. We ...
Wickremasinghe R G - - 2011
The p53 tumor suppressor protein has a key role in the induction of apoptosis of chronic lymphocytic leukemia (CLL) cells. Abnormalities within the p53 pathway identify a subset of patients with a poor prognosis. This review describes recent advances in understanding the mechanisms that regulate p53 levels and the role ...
Tsuchiya Naoto - - 2011
Selective activation of p53-target genes in response to various cellular stresses is a critical step in determining the ability to induce cell cycle arrest or apoptosis. Here we report that the identification of the microRNA, miR-22, as a p53 target gene that selectively determines the induction of p53-dependent apoptosis by ...
Audrito Valentina - - 2011
Due to its relatively indolent clinical course, chronic lymphocytic leukemia (CLL) offers a versatile model for testing novel therapeutic regimens and drug combinations. Nicotinamide is the main NAD+ precursor and a direct inhibitor of four classes of enzymes, including the sirtuins. SIRT1, the main member of the sirtuin family, inactivates ...
Hao Hongying - - 2011
E2F-1-deleted mutant, "truncated E2F" (E2Ftr, E2F-1[1-375]), lacking the carboxy-terminal transactivation domain, was shown to be more potent at inducing cancer cell apoptosis than wild-type E2F-1 (wtE2F-1; full-length E2F-1). Mechanisms by which wtE2F-1 and E2Ftr induce apoptosis, however, are not fully elucidated. Our study demonstrates molecular effects of pro-apoptotic BH3-only Bcl-2 ...
Han Weinong W Section of Dermatology, Department of Medicine, University of Chicago, Chicago, Illinois 60637, - - 2011
In response to ultraviolet B damage, keratinocytes undergo apoptosis to eliminate damaged cells, thereby preventing tumorigenic transformation. Caffeine, the most widely consumed psychoactive substance, produces complex pharmacological actions; it has been shown to be chemopreventive in non-melamona skin cancer in mice through increasing apoptosis. Here we have investigated the molecular ...
Bian Zhen - - 2011
Chronic inflammatory bowel diseases (IBDs) are associated with differential expression of genes involved in inflammation and tissue remodelling. We surveyed the expression profile of apoptosis-related microRNAs by real-time quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) in a dextran sulphate sodium (DSS) murine model of colitis. We found that miR-150 was strongly ...
Wu Li-Chen - - 2011
Quercetin, rich in fruits and vegetables, has been used as a nutritional supplement because of its anti-inflammatory and antioxidative properties. Its positive effects on anti-hepatic fibrosis have also been suggested. However the anti-hepatofibrotic mechanisms upon which quercetin acts have yet to be well characterized. In the present study, we investigated ...
Polyakova V O - - 2011
Immunohistochemical analysis of the expression of proapoptotic protein P53 and proliferation protein Ki-67 in human pineal gland showed that in people over 60 years pinealocyte proliferation is virtually absent. Moreover, pinealocyte apoptosis is more pronounced in elderly, whereas in senile and long-living individuals its intensity decreases.
Zhang Hui-Zhen - - 2011
Toxic cyanobacterial blooms in freshwater have been considered as threats to human health. Microcystins are a family of cyclic polypeptides produced by cyanobacteria and are toxic to plants and animals. Microcystin-LR (MC-LR) is the most toxic variant among the microcystin family and could cause oxidative stress in various organs, including ...
Han Yan-Tao - - 2011
Aims: Purple sweet potato (PSP) pigments were proved to protect murine thymocytes from (60)Co γ-ray-induced mitochondria-mediated apoptosis in our previous study. In this study, we further investigated the effect of PSP pigments on apoptosis related ROS, p53 and Bcl-2 family. Methods: Cell viability was analyzed by MTT. Apoptosis was certified ...
Malki Ahmed - - 2011
Metformin is the most widely used antidiabetic drug for type II diabetes in the world. Recent studies provide clues that the use of metformin may be associated with reduced incidence and improved prognosis of certain cancers and there is increasing evidence of a potential efficacy of this agent as an ...
Guo Wangang - - 2011
Backgrounds: RNA-binding protein QKI is abundantly expressed in the brain and heart. The role of QKI in the nervous system has been well characterized, but its function in cardiac muscle is still poorly understood. The present study was to investigate the role of QKI in ischemia/reperfusion-induced apoptosis in cardiomyocytes. Methods: ...
Farrell Kelly A - - 2011
C-Myb is a DNA-binding transcription factor that functions in apoptosis, proliferation and differentiation. The role of c-Myb in vascular injury has been investigated previously both in vitro and in vivo, where knock-down of c-Myb is known to lead to a reduction in proliferation and an increase in apoptosis of vascular ...
Stavrum Ruth - - 2011
[This corrects the article on p. e26295 in vol. 6.].
Pratheeshkumar P - - 2011
The objective of this study was to assess the effect of OA, a triterpene on inducing apoptosis in B16F-10 melanoma cells. Treatment of B16F-10 cells with nontoxic concentration of OA showed the presence of apoptotic bodies and induced DNA fragmentation in a dose-depended manner. Cell cycle analysis and TUNEL assay ...
Hazar-Rethinam Mehlika - - 2011
The E2F transcription factor family is traditionally associated with cell cycle control. However, recent data has shown that activating E2Fs (E2F1-3a) are potent activators of apoptosis. In contrast, the recently cloned inhibitory E2Fs (E2F7 and 8) appear to antagonize E2F-induced cell death. In this review we will discuss (i) the ...
Burgess Stewart T G - - 2011
Sheep scab, caused by infestation with the ectoparasitic mite Psoroptes ovis, results in the rapid development of cutaneous inflammation and leads to the crusted skin lesions characteristic of the disease. We described previously the global host transcriptional response to infestation with P. ovis, elucidating elements of the inflammatory processes which ...
Stavrum Ruth - - 2011
The outcome of many infections depends on the initial interactions between agent and host. Aiming at elucidating the effect of the M. tuberculosis Mce1 protein complex on host transcriptional and immunological responses to infection with M. tuberculosis, RNA from murine macrophages at 15, 30, 60 min, 4 and 10 hrs ...
Li Wei - - 2011
Deregulated thermal factors have been frequently implicated in the pathogenesis of male infertility, but the molecular basis through which certain responses are directed remain largely unknown. We previously reported that overexpression of exogenous Metastasis-associated protein 1 (MTA1) protects spermatogenic tumor cells GC-2spd (ts) against heat-induced apoptosis. To further dissect the ...
Roy Sanjit K - - 2011
The forkhead transcription factors of the O class (FOXO) play a direct role in cellular proliferation, oxidative stress response, and tumorigenesis. The objectives of this study were to examine whether FOXOs regulate antitumor activities of resveratrol in pancreatic cancer cells in vitro and in vivo. Pancreatic cancer cell lines were ...
Marfè Gabriella - - 2011
n our previous study, we have shown that canine coronavirus type II (CCoV-II) activates both extrinsic and intrinsic apoptotic pathway in a canine fibrosarcoma cell line (A-72 cells). Herein we investigated the role of Sirtuin and Forkhead box O (FOXO) families in this experimental model using Nortern Blot and Western ...
Kvitt Hagit - - 2011
Elevated seawater temperatures are associated with coral bleaching events and related mortality. Nevertheless, some coral species are able to survive bleaching and recover. The apoptotic responses associated to this ability were studied over 3 years in the coral Stylophora pistillata from the Gulf of Eilat subjected to long term thermal ...
Feridooni Tiam - - 2011
Doxorubicin (Dox) is an anthracycline used to effectively treat several forms of cancer. Unfortunately, the use of Dox is limited due to its association with cardiovascular complications which are manifested as acute and chronic cardiotoxicity. The pathophysiological mechanism of Dox induced cardiotoxicity appears to involve increased expression of the tumor ...
Tolfvenstam Thomas - - 2011
While dengue-elicited early and transient host responses preceding defervescence could shape the disease outcome and reveal mechanisms of the disease pathogenesis, assessment of these responses are difficult as patients rarely seek healthcare during the first days of benign fever and thus data are lacking. In this study, focusing on early ...
Wang Jun - - 2011
The purpose of this study was to assess the induced apoptosis of self-assembled iron oxide magnetic nanoparticles (MNPs) co-loaded with daunorubicin (DNR) and 5-bromotetrandrin (Br Tet) (DNR/Br Tet-MNPs), acting as a drug depot system for the sustained release of the loaded DNR and BrTet, in the drug resistant human leukemia ...
Reuland Steven N - - 2011
Metastatic melanoma has poor prognosis and is refractory to most conventional chemotherapies. The alkylating agent temozolomide (TMZ) is commonly used in treating melanoma but has a disappointing response rate. Agents that can act cooperatively with TMZ and improve its efficacy are thus highly sought after. The BH3 mimetic ABT-737, which ...
García María Angel - - 2011
The chemotherapeutic drug 5-FU is widely used in the treatment of a range of cancers, but resistance to the drug remains a major clinical problem. Since defects in the mediators of apoptosis may account for chemo-resistance, the identification of new targets involved in 5-FU-induced apoptosis is of main clinical interest. ...
Guan Hongyu - - 2011
The aim of this study was to investigate the mechanism through which Sphingosine kinase-1 (SPHK1) exerts its anti-apoptosis activity in glioma cancer cells. We here report that dysregulation of SPHK1 alters the sensitivity of glioma to apoptosis both in vitro and in vivo. Further mechanistic study examined the expression of ...
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