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https://www.readbyqxmd.com/read/28734260/time-averaged-concentrations-are-effective-for-predicting-chronic-toxicity-of-varying-copper-pulse-exposures-for-two-freshwater-green-algae-species
#1
Brad M Angel, Stuart L Simpson, Ellissah Granger, Kathryn Goodwyn, Dianne F Jolley
Intermittent, fluctuating and pulsed contaminant discharges may result in organisms receiving highly variable contaminant exposures. This study investigated the effects of dissolved copper pulse concentration and exposure duration on the toxicity to two freshwater green algae species. The effects of single copper pulses of between 1 and 48 h duration and continuous exposures (72 h) on growth rate inhibition of Pseudokirchneriella subcapitata and Chlorella sp. were compared on a time-averaged concentration (TAC) basis...
July 19, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28734243/caveolin-1-related-autophagy-initiated-by-aldosterone-induced-oxidation-promotes-liver-sinusoidal-endothelial-cells-defenestration
#2
Xiaoying Luo, Dan Wang, Xuan Luo, Xintao Zhu, Guozhen Wang, Zuowei Ning, Yang Li, Xiaoxin Ma, Renqiang Yang, Siyi Jin, Yun Huang, Ying Meng, Xu Li
Aldosterone, with pro-oxidation and pro-autophagy capabilities, plays a key role in liver fibrosis. However, the mechanisms underlying aldosterone-promoted liver sinusoidal endothelial cells (LSECs) defenestration remain unknown. Caveolin 1 (Cav1) displays close links with autophagy and fenestration. Hence, we aim to investigate the role of Cav1-related autophagy in LSECs defenestration. We found the increase of aldosterone/MR (mineralocorticoid receptor) level, oxidation, autophagy, and defenestration in LSECs in the human fibrotic liver, BDL or hyperaldosteronism models; while antagonizing aldosterone or inhibiting autophagy relieved LSECs defenestration in BDL-induced fibrosis or hyperaldosteronism models...
July 13, 2017: Redox Biology
https://www.readbyqxmd.com/read/28734229/effects-of-dietary-starch-types-on-early-postmortem-muscle-energy-metabolism-in-finishing-pigs
#3
Y J Li, T Gao, J L Li, L Zhang, F Gao, G H Zhou
This study aimed to investigate the effects of different dietary starch types on early postmortem muscle energy metabolism in finishing pigs. Ninety barrows (68.0±2.0kg) were randomly allotted to three experimental diets with five replicates of six pigs, containing pure waxy maize starch (WMS), nonwaxy maize starch (NMS), and pea starch (PS) (amylose/amylopectin were 0.07, 0.19 and 0.28 respectively). Compared with the WMS diet, pigs fed the PS diet exhibited greater creatine kinase activity, higher adenosine triphosphate and adenosine diphosphate contents, lower phosphocreatine (PCr), adenosine monophosphate and glycogen contents, and lower glycolytic potential (P<0...
July 12, 2017: Meat Science
https://www.readbyqxmd.com/read/28734227/continuous-delivery-of-neutralizing-antibodies-elevate-ccl2-levels-in-mice-bearing-mcf10ca1d-breast-tumor-xenografts
#4
Min Yao, Curtis Smart, Qingting Hu, Nikki Cheng
Chemokines are small soluble molecules that play critical roles in wound healing, infection, and cancer progression. In particular, overexpression of the C-C motif chemokine ligand 2 (CCL2) in multiple cancer types correlates with poor patient prognosis. Animal studies have shown that CCL2 signals to macrophages and breast cancer cells to promote tumor growth, invasion, and metastasis, indicating that CCL2 is a promising therapeutic target. However, the effectiveness of human-specific neutralizing antibodies has not been fully evaluated...
July 19, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28734226/inhibition-of-prb-pathway-differentially-modulates-apoptosis-in-esophageal-cancer-cells
#5
Rossana C Soletti, Deborah Biasoli, Nathassya A L V Rodrigues, João M A Delou, Renata Maciel, Vera L A Chagas, Rodrigo A P Martins, Stevens K Rehen, Helena L Borges
Esophageal cancer is the sixth most common cause of cancer-related death worldwide. Current chemotherapy regimens include a combination of 5-fluorouracil (5-FU) and cisplatin, but more efficient therapy strategies are needed to increase 5-year survival. Alterations in the signaling pathway of the tumor suppressor gene Rb-1, which encodes a phosphoprotein (pRB) that negatively regulates the G1/S transition of the cell cycle, are present in 70% of all tumors, but its role in esophageal cancer is still unclear...
July 19, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28734209/new-insight-into-the-environmental-impact-of-two-imidazolium-ionic-liquids-effects-on-seed-germination-and-soil-microbial-activity
#6
J Salgado, J J Parajó, T Teijeira, O Cruz, J Proupín, M Villanueva, J A Rodríguez-Añón, P V Verdes, O Reyes
The next generation of ionic liquids must be synthetized taking into account structures that guarantee the suitable properties for a defined application as well as ecological data. Thus, searching of the right methodologies to know, quickly and efficiently, the ecological effects of these compounds is a preliminary task. The effects of two imidazolium based ionic liquids with different anions, 1-butyl-3-methylimidazolium tetrafluoroborate, [C4C1Im][BF4], and 1-propyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C3C1Im][NTf2], on seedling emergence of six tree species and on the microbial behaviour of two soils were determined in this work...
July 14, 2017: Chemosphere
https://www.readbyqxmd.com/read/28734208/effect-of-mutation-on-a%C3%AE-1-42-heme-complex-in-aggregation-mechanism-alzheimer-s-disease
#7
Subramaniam Boopathi, Ponmalai Kolandaivel
Amyloid β (Aβ) peptide aggregation is one of the root causes for Alzheimer's disease. Recently, experimental studies show that three active binding sites (His6, His13 and His14) of Aβ peptides were bound with heme to form Aβ-Heme complex, which leads to inhibit the aggregation process. We apply molecular dynamic simulation to investigate the aggregation pathways of Aβ-Heme peptides. The above three binding sites were mutated by Glycine residue individually and generate three complex systems such as Aβ(His6Gly)-Heme, Aβ(His13Gly)-Heme and Aβ(His14Gly)-Heme...
July 8, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28734204/molecular-dynamics-of-conformation-specific-dopamine-transporter-inhibitor-complexes
#8
Bernandie Jean, Christopher K Surratt, Jeffry D Madura
The recreational psychostimulant cocaine inhibits dopamine reuptake from the synapse, resulting in excessive stimulation of postsynaptic dopamine receptors in brain areas associated with reward and addiction. Cocaine binds to and stabilizes the outward- (extracellular-) facing conformation of the dopamine transporter (DAT) protein, while the low abuse potential DAT inhibitor benztropine prefers the inward- (cytoplasmic-) facing conformation. A correlation has been previously postulated between psychostimulant abuse potential and preference for the outward-facing DAT conformation...
July 11, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28734203/exenatide-mitigated-diet-induced-vascular-aging-and-atherosclerotic-plaque-growth-in-apoe-deficient-mice-under-chronic-stress
#9
Guang Yang, Yanna Lei, Aiko Inoue, Limei Piao, Lina Hu, Haiying Jiang, Takeshi Sasaki, Hongxian Wu, Wenhu Xu, Chenglin Yu, Guangxian Zhao, Shinyu Ogasawara, Kenji Okumura, Masafumi Kuzuya, Xian-Wu Cheng
BACKGROUND AND AIMS: Exposure to psychosocial stress is a risk factor for cardiovascular disorders. Because the glucagon-like peptide-1 (GLP-1) receptor (GLP-1R) agonist prevents cardiovascular injury, we investigated the beneficial effects and mechanism of the GLP-1 analogue exenatide on stress-related vascular senescence and atherosclerosis in apolipoprotein E-deficient (ApoE(-/-)) mice fed a high-fat (HF) diet. METHODS: ApoE(-/-) mice fed the HF diet were assigned to non-stressed and immobilized-stress groups for 12 weeks...
July 13, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28734166/naturally-occurring-immunomodulators-with-antitumor-activity-an-insight-on-their-mechanisms-of-action
#10
REVIEW
Shimaa Ibrahim Abdelmonym Mohamed, Ibrahim Jantan, Md Areeful Haque
Natural products with immunomodulatory activity are widely used in treatment of many diseases including autoimmune diseases, inflammatory disorders in addition to cancer. They gained a great interest in the last decades as therapeutic agents since they provide inexpensive and less toxic products than the synthetic chemotherapeutic agents. Immunomodulators are the agents that have the ability to boost or suppress the host defense response that can be used as a prophylaxis as well as in combination with other therapeutic modalities...
July 19, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28734158/interaction-between-platelet-derived-micrornas-and-cyp2c19-2-genotype-on-clopidogrel-antiplatelet-responsiveness-in-patients-with-acs
#11
Li Peng, Jun Liu, Liuan Qin, Jia Liu, Shaozhi Xi, Caiyi Lu, Tong Yin
BACKGROUND: Both platelet-derived microRNAs and the genotype of CYP2C19*2 were implicated for the variability of clopidogrel antiplatelet responsiveness. However, their interaction on the antiplatelet responsiveness of clopidogrel in patients with acute coronary syndrome (ACS) remains unknown. METHODS: Consecutive clopidogrel-treated patients with ACS were recruited, with their antiplatelet responsiveness evaluated by the relative platelet inhibition (RI), as measured by light transmittance aggregometry (LTA) at baseline and 5days' after the maintenance treatment of clopidogrel...
July 13, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28734155/activation-of-mtor-is-involved-in-anti-%C3%AE-2gpi-%C3%AE-2gpi-induced-expression-of-tissue-factor-and-il-8-in-monocytes
#12
Longfei Xia, Hong Zhou, Ting Wang, Yachao Xie, Ting Wang, Xiaoyan Wang, Jinchuan Yan
Previous study has demonstrated that activation of the mammalian target of rapamycin (mTOR) pathway in endothelial cells (ECs) results in the formation of chronic vascular lesions associated with antiphospholipid syndrome (APS). In addition, it has been shown that stimulation of monocytes and ECs by antiphospholipid antibodies (aPL) leads to a prothrombotic and proinflammatory state and up-regulated expression of tissue factor (TF) and inflammatory cytokines. However, the role of mTOR in pathogenic mechanisms of APS remains largely unexplored...
June 1, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28732405/increased-n2o-emission-by-inhibited-plant-growth-in-the-co2-leaked-soil-environment-simulation-of-co2-leakage-from-carbon-capture-and-storage-ccs-site
#13
You Jin Kim, Wenmei He, Daegeun Ko, Haegeun Chung, Gayoung Yoo
Atmospheric carbon dioxide (CO2) concentrations is continuing to increase due to anthropogenic activity, and geological CO2 storage via carbon capture and storage (CCS) technology can be an effective way to mitigate global warming due to CO2 emission. However, the possibility of CO2 leakage from reservoirs and pipelines exists, and such leakage could negatively affect organisms in the soil environment. Therefore, to determine the impacts of geological CO2 leakage on plant and soil processes, we conducted a greenhouse study in which plants and soils were exposed to high levels of soil CO2...
July 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28732393/microrna-30a-suppresses-tumor-progression-by-blocking-ras-raf-mek-erk-signaling-pathway-in-hepatocellular-carcinoma
#14
Kun Zhou, Xiaoyu Luo, Yu Wang, Dachun Cao, Gang Sun
Emerging reports suggest microRNAs (miRNAs) play a vital role in the progression of malignant tumors. MiR-30a is downregulated in a variety of cancers and acts as a tumor suppressing gene. However, the molecular mechanisms of miRNA-30a in hepatocellular carcinoma (HCC) are still unclear. Hereby, in this study, we detected that miR-30a expression was significantly down-regulated in both HCC tissues compared with adjacent non-cancerous liver tissues, and we also observed that miR-30a expression was lower in HCC cell lines than that of normal controls...
July 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28732389/loss-of-sun2-promotes-the-progression-of-prostate-cancer-by-regulating-fatty-acid-oxidation
#15
Cheng Yajun, Ye Chen, Li Xiaosa, Wang Xiao, Chen Jia, Wang Zhong, Xu Bin
The role of Sun2 has been described by previous studies in various types of cancers, including breast cancer and lung cancer. However, its role and potential molecular mechanism in the progression of prostate cancer have not been fully elucidated. In the present study, we found that Sun2 expression was reduced in prostate cancer tissues compared with paired normal tissues, and that low expression of Sun2 was significantly correlated with Higher Gleason scores, postoperative T stage (pT), Lymph nodal invasion and Clinical pathological stages...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732387/the-micrornas-mir-200b-3p-and-mir-429-5p-target-the-limk1-cfl1-pathway-to-inhibit-growth-and-motility-of-breast-cancer-cells
#16
Dengfeng Li, Hong Wang, Hongming Song, Hui Xu, Bingkun Zhao, Chenyang Wu, Jiashu Hu, Tianqi Wu, Dan Xie, Junyong Zhao, Qiang Shen, Lin Fang
Triple-negative breast cancer (TNBC) has the worst prognosis of all subtypes of breast cancer (BC), with limited options for conventional therapy and no targeted therapies. MicroRNAs (miRNAs) are small noncoding RNAs that negatively regulate gene expression. In this study, we aimed to determine whether two members of the miR-200 family, miR-200b-3p and miR-429-5p, are involved in BC cell proliferation and motility and to elucidate their target genes and pathways. We performed a meta-analysis that reveals down-regulated expression of miR-200b-3p and miR-429-5p in BC tissues and cell lines, consistent with a lower expression of miR-200b-3p and miR-429-5p in MDA-MB-231 and HCC1937 cells than in MCF-7 and MCF-10 cells...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732377/thrombospondin-1-is-a-multifaceted-player-in-tumor-progression
#17
REVIEW
Tingting Huang, Li Sun, Xianglin Yuan, Hong Qiu
Thrombospondins are a family of extracellular matrix (ECM) proteins. Thrombospondin-1 (TSP1) was the first member to be identified and is a main player in tumor microenvironment. The diverse functions of TSP1 depend on the interactions between its structural domains and multiple cell surface molecules. TSP1 acts as an angiogenesis inhibitor by stimulating endothelial cell apoptosis, inhibiting endothelial cell migration and proliferation, and regulating vascular endothelial growth factor bioavailability and activity...
July 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732374/the-protective-effect-of-pft%C3%AE-on-alcohol-induced-osteonecrosis-of-the-femoral-head
#18
Yi-Xuan Chen, Dao-Yu Zhu, Jun-Hui Yin, Wen-Jing Yin, Yue-Lei Zhang, Hao Ding, Xiao-Wei Yu, Jiong Mei, You-Shui Gao, Chang-Qing Zhang
Epidemiologic studies have shown alcohol plays a pivotal role in the development of osteonecrosis of the femoral head (ONFH). The aim of this study was to explore the underlying mechanism of alcohol-induced ONFH and the protective effect of pifithrin-α (PFTα). In vitro, we found ethanol treatment significantly activated p53, suppressed Wnt/β-catenin signaling and inhibited osteogenic-related proteins. Furthermore, by separating the cytoplasmic and nuclear proteins, we found ethanol inhibited osteogenesis by impairing the accumulation of β-catenin in both the cytoplasm and nucleus in human bone mesenchymal stem cells (hBMSCs), which resulted from activating glycogen synthase kinase-3β (GSK-3β)...
July 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732366/rassf6-downregulation-promotes-the-epithelial-mesenchymal-transition-and-predicts-poor-prognosis-in-colorectal-cancer
#19
Rui Zhou, Lin Qiu, Xiaolong Liu, Lijuan Ling, Ninglei Li, Kun Zhou, Jingbo Sun, Jian Yan, Canliang Tan, Xiaoping Huang, Luzhe Han, Liangchun Yin, Gang Xiao, Lixin Liu
Distant metastasis is the primary barrier for the successful treatment of patients with colorectal cancer, and thus, searching for new therapeutic targets by further exploring the molecular mechanisms of colorectal cancer metastasis is important. In this study, we investigated the biological and clinical significance of RASSF6 in colorectal cancer as well as the underlying molecular mechanisms. We found that low RASSF6 expression corresponds to a poor prognosis in colorectal cancer patients, and low RASSF6 expression is distinctly associated with tumour progression...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732362/acute-atorvastatin-treatment-restores-the-cardioprotective-effects-of-ischemic-postconditioning-in-hyperlipidemic-rats
#20
Tao Sun, Hong-Ju Zhang, Chayakrit Krittanawong, Su Wang, Ying Tao, Zhao Li, Qiancheng Yin, Donghua Zhang, Qian Wang, Ji Huang, Jingmei Zhang, Zhizhong Li, Yutong Cheng
BACKGROUND: Ischemic Postconditioning (IPC) reduces ischemia/reperfusion (I/R) injury under normal conditions. HMG-CoA reductase inhibitors (statins), which inhibit the synthesis of mevalonate, can interfere with the cardioprotective effect of IPC. However, the beneficial role of IPC in hyperlipidemic patients, post-acute administration of statins remains unknown. This study was to determine if acute administration of atorvastatin affect the infarct size-limiting effect of IPC in hyperlipidemic rats...
July 14, 2017: Oncotarget
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