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https://www.readbyqxmd.com/read/28938593/endoplasmic-reticulum-stress-mediated-membrane-expression-of-crt-erp57-induces-immunogenic-apoptosis-in-drug-resistant-endometrial-cancer-cells
#1
Qin Xu, Chuanben Chen, An Lin, Yunqing Xie
OBJECTIVE: To investigate the role of endoplasmic reticulum (ER) stress-mediated CRT/ERp57 complex expression underlying the mechanism of resistance to doxorubicin (DOX) in endometrial carcinoma (EC) in vivo and in vitro. METHODS: The expression of CRT, ERp57, p-PERK, eIF2α, p-eIF2α in EC patients and EC cells was detected by Western blots and by immunofluorescence assay. MTT assay was used to determine the LC50 of EC cells to DOX and cell viability. Apoptosis was assayed using flow cytometer...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28937624/therapeutic-mechanisms-of-vernonia-amygdalina-delile-in-the-treatment-of-prostate-cancer
#2
William Johnson, Paul B Tchounwou, Clement G Yedjou
Prostate cancer patients have been suffering from limited treatment options due to late diagnosis, poor drug tolerance, and multi-drug resistance to almost all the current drug treatments. Therefore, it is important to seek a new alternative therapeutic medicine that can effectively prevent the disease and even eradicate the progression and metastasis of prostate cancer. Vernonia amygdalina Delile (VAD) is a common edible vegetable in Cameroon that has been used as a traditional medicine for some human diseases...
September 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28937603/proteome-stability-as-a-key-factor-of-genome-integrity
#3
REVIEW
Sentiljana Gumeni, Zoi Evangelakou, Vassilis G Gorgoulis, Ioannis P Trougakos
DNA damage is constantly produced by both endogenous and exogenous factors; DNA lesions then trigger the so-called DNA damaged response (DDR). This is a highly synchronized pathway that involves recognition, signaling and repair of the damage. Failure to eliminate DNA lesions is associated with genome instability, a driving force in tumorigenesis. Proteins carry out the vast majority of cellular functions and thus proteome quality control (PQC) is critical for the maintenance of cellular functionality. PQC is assured by the proteostasis network (PN), which under conditions of proteome instability address the triage decision of protein fold, hold, or degrade...
September 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28936806/simultaneous-application-of-cisplatin-and-static-magnetic-field-enhances-oxidative-stress-in-hela-cell-line
#4
Samaneh Kamalipooya, Parviz Abdolmaleki, Zahra Salemi, Fatemeh Javani Jouni, Jaber Zafari, Homa Soleimani
In this study, we reported the effects of simultaneous application of static magnetic field (SMF) and cisplatin as an anticancer drug on the oxidative stress in human cervical cancer (HeLa) cell line and normal skin fibroblast cells (Hu02). The cells were exposed to different SMF intensities (7, 10, and 15 mT) for 24 and 48 h. IC50 concentrations of cisplatin were obtained by MTT assay. The cytotoxic effects of combined treatment were studied by measuring the intracellular reactive oxygen species content using flow cytometric method and estimation of membrane lipid peroxidation by spectrophotometry...
September 21, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/28936177/withaferin-a-induces-oxidative-stress-mediated-apoptosis-and-dna-damage-in-oral-cancer-cells
#5
Hsueh-Wei Chang, Ruei-Nian Li, Hui-Ru Wang, Jing-Ru Liu, Jen-Yang Tang, Hurng-Wern Huang, Yu-Hsuan Chan, Ching-Yu Yen
Withaferin A (WFA) is one of the most active steroidal lactones with reactive oxygen species (ROS) modulating effects against several types of cancer. ROS regulation involves selective killing. However, the anticancer and selective killing effects of WFA against oral cancer cells remain unclear. We evaluated whether the killing ability of WFA is selective, and we explored its mechanism against oral cancer cells. An MTS tetrazolium cell proliferation assay confirmed that WFA selectively killed two oral cancer cells (Ca9-22 and CAL 27) rather than normal oral cells (HGF-1)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28934364/the-histone-variant-macroh2a-confers-functional-robustness-to-the-intestinal-stem-cell-compartment
#6
Ryan James Cedeno, Angela Nakauka-Ddamba, Maryam Yousefi, Stephanie Sterling, Nicolae Adrian Leu, Ning Li, John R Pehrson, Christopher Joachim Lengner
A stem cell's epigenome directs cell fate during development, homeostasis, and regeneration. Epigenetic dysregulation can lead to inappropriate cell fate decisions, aberrant cell function, and even cancer. The histone variant macroH2A has been shown to influence gene expression, guide cell fate, and safeguard against genotoxic stress. Interestingly, mice lacking functional macroH2A histones (hereafter referred to as macroH2A DKO) are viable and fertile; yet suffer from increased perinatal death and reduced weight and size compared to wildtype (WT)...
2017: PloS One
https://www.readbyqxmd.com/read/28933787/blocking-autophagy-enhances-the-apoptotic-effect-of-18%C3%AE-glycyrrhetinic-acid-on-human-sarcoma-cells-via-endoplasmic-reticulum-stress-and-jnk-activation
#7
Shuying Shen, Menglu Zhou, Kangmao Huang, Yizheng Wu, Yan Ma, Jiying Wang, Jianjun Ma, Shunwu Fan
Sarcoma, a rare form of cancer, is unlike the much more common carcinomas as it occurs in a distinct type of tissue. The potent antitumor effects of 18β-glycyrrhetinic acid (GA), a novel naturally derived agent, have been demonstrated in various cancers. However, the effect of GA on human sarcoma, and the underlying mechanisms, remain to be elucidated. In the current study, we show that GA inhibits sarcoma cell proliferation by inducing G0/G1-phase arrest. Exposure to GA resulted in the activation of caspase-3, -8, and -9, indicating that GA induced apoptosis through both extrinsic and intrinsic pathways...
September 21, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28933598/autophagy-gene-atg7-regulates-ultraviolet-radiation-induced-inflammation-and-skin-tumorigenesis
#8
Lei Qiang, Ashley Sample, Christopher R Shea, Keyoumars Soltani, Kay F Macleod, Yu-Ying He
Macroautophagy (hereafter autophagy) is a cellular "self-eating" process that is implicated in many human cancers, where it can act to either promote or suppress tumorigenesis. However, the role of autophagy in regulation of inflammation during tumorigenesis remains unclear. Here we show that autophagy is induced in the epidermis by ultraviolet (UV) irradiation and autophagy gene Atg7 promoted UV-induced inflammation and skin tumorigenesis. Atg7 regulated UV-induced cytokine expression and secretion, and promoted Ptgs2/Cox-2 expression through both a CREB1/CREB-dependent cell autonomous mechanism and an IL1B/IL1β-dependent non-cell autonomous mechanism...
September 21, 2017: Autophagy
https://www.readbyqxmd.com/read/28933588/death-by-over-eating-the-gaucher-disease-associated-gene-gba1-identified-in-a-screen-for-mediators-of-autophagic-cell-death-is-necessary-for-developmental-cell-death-in-drosophila-midgut
#9
Santosh K Dasari, Eyal Schejter, Shani Bialik, Aya Shkedy, Vered Levin-Salomon, Smadar Levin-Zaidman, Adi Kimchi
Autophagy is critical for homeostasis and cell survival during stress, but can also lead to cell death, a little understood process that has been shown to contribute to developmental cell death in lower model organisms, and to human cancer cell death. We recently reported (1) on our thorough molecular and morphologic characterization of an autophagic cell death system involving resveratrol treatment of lung carcinoma cells. To gain mechanistic insight into this death program, we performed a signalome-wide RNAi screen for genes whose functions are necessary for resveratrol-induced death...
September 21, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28933565/sleep-duration-nightshift-work-and-the-timing-of-meals-and-urinary-levels-of-8-isoprostane-and-6-sulfatoxymelatonin-in-japanese-women
#10
Chisato Nagata, Takashi Tamura, Keiko Wada, Kie Konishi, Yuko Goto, Yasuko Nagao, Kazuhiro Ishihara, Satoru Yamamoto
It has been hypothesized that disruption of circadian rhythms affects human health. Shift work and sleep deprivation are thought to disrupt the normal light-dark cycle, although the disruption due to shiftwork may be dependent on sleep deprivation. Both conditions have been suggested to be associated with an increased risk of cardiometabolic disorders. Non-photic environmental factors, such as the timing of eating, are also thought to regulate circadian rhythm and thus, may have effects on health, but the evidence from human studies is scarce...
September 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28933413/the-role-of-the-nrf2-are-antioxidant-system-in-preventing-cardiovascular-diseases
#11
REVIEW
Robert E Smith, Kevin Tran, Cynthia C Smith, Miranda McDonald, Pushkar Shejwalkar, Kenji Hara
It is widely believed that consuming foods and beverages that have high concentrations of antioxidants can prevent cardiovascular diseases and many types of cancer. As a result, many articles have been published that give the total antioxidant capacities of foods in vitro. However, many antioxidants behave quite differently in vivo. Some of them, such as resveratrol (in red wine) and epigallocatechin gallate or EGCG (in green tea) can activate the nuclear erythroid-2 like factor-2 (Nrf2) transcription factor...
November 11, 2016: Diseases (Basel)
https://www.readbyqxmd.com/read/28933366/the-role-of-the-mapk-signaling-topoisomerase-and-dietary-bioactives-in-controlling-cancer-incidence
#12
REVIEW
Khaled A Selim, Hend Abdelrasoul, Mohamed Aboelmagd, Ahmed M Tawila
Reactive oxygen species (ROS) are common products of mitochondrial oxidative phosphorylation, xenobiotics metabolism and are generated in response to several environmental stress conditions. Some of them play important biochemical roles in cellular signal transduction and gene transcription. On the other hand, ROS are known to be involved in a wide range of human diseases, including cancer. The excessive production of such ROS together with disruption of homeostasis detoxifying mechanisms can mediate a series of cellular oxidative stresses...
April 26, 2017: Diseases (Basel)
https://www.readbyqxmd.com/read/28933316/photo-activatable-akt-probe-a-new-tool-to-study-the-akt-dependent-physiopathology-of-cancer-cells
#13
Sanae Haga, Takeaki Ozawa, Naoki Morita, Mami Asano, Shigeki Jin, Michitaka Ozakia
Akt is commonly overexpressed and activated in cancer cells, and plays a pivotal role in cell survival, protection andchemo-resistance. Therefore, Akt is one of the target molecules in understanding characters of cancer cells and developing anti-cancer drugs. Here, we examined whether a newly developed photo-activatable Akt (PA-Akt) probe, based on a light-inducible protein interaction module of plant cryptochrome2 (CRY2) and cryptochrome-interacting basic-helix-loop-helix (CIB1), can regulate Akt-associated cell functions...
August 30, 2017: Oncology Research
https://www.readbyqxmd.com/read/28932315/experimental-hepatic-carcinogenesis-oxidative-stress-and-natural-antioxidants
#14
REVIEW
Velid Unsal, Ergül Belge-Kurutaş
Hepatocellular carcinoma is one of the most common cancers in the world, and it is influenced by agents such as DEN, 2-AAF, phenobarbital, alcohol, aflatoxin B1 metabolite or hepatitis viruses (B and C). Oxidative stress is becoming recognized as a key factor in the progression of hepatocarcinogenesis. Reactive oxygen species can play a leading role in initiation and promotion of hepatic carcinogenesis. The metabolites of DEN Diethylnitrosamine (DEN) mediate the binding of tumour promoters by covalently binding to the DNA with one or two oxidation-providing electrons...
August 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28931882/honokiol-protects-against-doxorubicin-cardiotoxicity-via-improving-mitochondrial-function-in-mouse-hearts
#15
Lizhen Huang, Kailiang Zhang, Yingying Guo, Fengyuan Huang, Kevin Yang, Long Chen, Kai Huang, Fengxue Zhang, Qinqiang Long, Qinglin Yang
Honokiol is a key component of a medicinal herb, Magnolia bark. Honokiol possesses potential pharmacological benefits for many disease conditions, especially cancer. Recent studies demonstrate that Honokiol exerts beneficial effects on cardiac hypertrophy and doxorubicin (Dox)-cardiotoxicity via deacetylation of mitochondrial proteins. However, the effects and mechanisms of Honokiol on cardiac mitochondrial respiration remain unclear. In the present study, we investigate the effect of Honokiol on cardiac mitochondrial respiration in mice subjected to Dox treatment...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931870/inactivation-of-hmgcl-promotes-proliferation-and-metastasis-of-nasopharyngeal-carcinoma-by-suppressing-oxidative-stress
#16
Wenqi Luo, Liting Qin, Bo Li, Zhipeng Liao, Jiezhen Liang, Xiling Xiao, Xue Xiao, Yingxi Mo, Guangwu Huang, Zhe Zhang, Xiaoying Zhou, Ping Li
Altered metabolism is considered as a hallmark of cancer. Here we investigated expression of 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) 2 lyase (HMGCL), an essential enzyme in ketogenesis, which produces ketone bodies by the breakdown of fatty acids to supply energy, in nasopharyngeal carcinoma (NPC). The expression of HMGCL was silenced in NPC tissue. Downregulation of HMGCL in NPC was associated with low intracellular β-hydroxybutyrate (β-HB) production, thereby reducing reactive oxygen species (ROS) generation...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931330/sequential-molecular-changes-and-dynamic-oxidative-stress-in-high-grade-serous-ovarian-carcinogenesis
#17
Hiroshi Kobayashi, Kenji Ogawa, Naoki Kawahara, Kana Iwai, Emiko Niiro, Sachiko Morioka, Yuki Yamada
The mechanism of high-grade serous ovarian cancer (HGSC) development remains elusive. This review outlines recent advances in the understanding of sequential molecular changes associated with the development of HGSC, as well as describes oxidative stress-induced genomic instability and carcinogenesis. This article reviews the English-language literature between 2005 and 2017. Clinicopathological features analysis provide a sequential progression of fallopian tubal epithelium to precursor lesions to type 2 HGSC...
September 21, 2017: Free Radical Research
https://www.readbyqxmd.com/read/28931068/erk1-2-signalling-protects-against-apoptosis-following-endoplasmic-reticulum-stress-but-cannot-provide-long-term-protection-against-bax-bak-independent-cell-death
#18
Nicola J Darling, Kathryn Balmanno, Simon J Cook
Disruption of protein folding in the endoplasmic reticulum (ER) causes ER stress. Activation of the unfolded protein response (UPR) acts to restore protein homeostasis or, if ER stress is severe or persistent, drive apoptosis, which is thought to proceed through the cell intrinsic, mitochondrial pathway. Indeed, cells that lack the key executioner proteins BAX and BAK are protected from ER stress-induced apoptosis. Here we show that chronic ER stress causes the progressive inhibition of the extracellular signal-regulated kinase (ERK1/2) signalling pathway...
2017: PloS One
https://www.readbyqxmd.com/read/28931006/up-regulation-of-calreticulin-in-mouse-liver-tissues-after-long-term-irradiation-with-low-dose-rate-gamma-rays
#19
Lan Yi, Nan Hu, Jie Yin, Jing Sun, Hongxiang Mu, Keren Dai, Dexin Ding
The biological effects of low-dose or low-dose-rate ionizing radiation on normal tissues has attracted attention. Based on previous research, we observed the morphology of liver tissues of C57BL/6J mice that received <50, 50-500, and 500-1000 μGy/h of 137Cs radiation for 180 d. We found that the pathological changes in liver tissues were more obvious as the irradiation dose rates increased. Additionally, differential protein expression in liver tissues was analyzed using a proteomics approach. Compared with the matched group in the 2D gel analysis of the irradiated groups, 69 proteins had ≥ 1...
2017: PloS One
https://www.readbyqxmd.com/read/28930534/regulation-of-poly-adp-ribose-polymerase-1-functions-by-post-translational-modifications
#20
Lianhua Piao, Kyoko Fujioka, Makoto Nakakido, Ryuji Hamamoto
The poly(ADP-ribose) polymerases (PARPs) catalyze poly(ADP-ribosyl)ation, a post-translational modification of proteins. This  consists of the attachment of mono- or poly-adenosine diphosphate (ADP)-ribose units from nicotinamide adenine dinucleotide (NAD(+)) to specific polar residues of target proteins. PARP1 is the most abundant and best-characterized member of the family of PARP enzymes. PARP1 plays key roles in DNA repair, as well as a wide variety of cellular processes, including transcriptional regulation, chromatin modulation, cellular signaling pathway, inflammation, cellular stress responses and so on...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
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