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https://www.readbyqxmd.com/read/28731233/integration-of-cellular-and-molecular-endpoints-to-assess-the-toxicity-of-polycyclic-aromatic-hydrocarbons-in-hepg2-cell-line
#1
Patrícia I Morgado, Sílvia Jose, Riccardo Wanke, Alexandra M M Antunes, Ana Sofia Cardoso, Luisa Jordao
Polycyclic aromatic hydrocarbons (PAHs) are persistent pollutants present in the environment with known mutagenic and carcinogenic properties. In the present study the effect of exposure to single or multiple doses of benzo[a]anthracene (BaA), pyrene (Pyr) and three halogenated derivatives of these compounds (1-ClPyr; 1-BrPyr and 7-ClBaA) were evaluated in a liver-derived human cell line (HepG2). Cytotoxicity as assessed by the classic MTT and neutral red assays showed a mild toxic effect in response to single or multiple dose exposure for up to 72h; except for multiple dose exposure to BaA and 7-ClBaA (1μM per day during 4 days) and single exposure to 10 μM BaA...
July 21, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28731187/isolation-and-purification-of-novel-peptides-derived-from-sepia-ink-effects-on-apoptosis-of-prostate-cancer-cell-pc%C3%A2-3
#2
Fangfang Huang, Yinwen Jing, Guofang Ding, Zuisu Yang
Novel prostate cancer therapeutics are in high demand. In order to identify potential therapeutic targets, protein from sepia ink was hydrolyzed by utilizing pepsin in an orthogonal array design. Pepsin hydrolysate (SH) obtained at optimal conditions exhibited the highest antitumor activity. Subsequently, a novel antitumor peptide, which was termed SHP, was isolated through ultrafiltration, gel filtration chromatography and reversed phase high‑performance liquid chromatography. The amino acid sequence of SHP was identified as Leu‑Lys‑Glu‑Glu‑Asn‑Arg‑Arg‑Arg‑Arg‑Asp with a molecular mass of 1371...
July 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28731183/paeoniflorin-exerts-neuroprotective-effects-against-glutamate%C3%A2-induced-pc12-cellular-cytotoxicity-by-inhibiting-apoptosis
#3
Ahong Chen, Hongyun Wang, Yuqin Zhang, Xiaoying Wang, Lishuang Yu, Wen Xu, Wei Xu, Yu Lin
Paeoniflorin (PF) is an active ingredient of Radix Paeoniae, which is known to exert neuroprotective effects. However, the mechanims behind the neuroprotective effects of PF are not yet fully understood. The apoptosis of neurons plays an important role in the cerebral ischemia-induced cascade response. This study aimed to investigate neuroprotective effects of PF against glutamate‑induced PC12 cellular cytotoxicity and to determine whether these effects are mediated via the inhibition of apoptosis in vitro and the activity of mitochondrial apoptosis-associated proteins in PC12 cells...
July 20, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28731027/ptenp1-acts-as-a-cerna-to-regulate-pten-by-sponging-mir-19b-and-explores-the-biological-role-of-ptenp1-in-breast-cancer
#4
R-K Li, J- Gao, L-H Guo, G-Q Huang, W-H Luo
This study aimed to investigate role of long noncoding RNA PTENP1 regulating PTEN expression via miR-19b to affect breast cancer (BC) progression. We measured expressions of PTENP1, miR-19b and PTEN in 65 matched BC cancerous and noncancerous tissues by quantitative real-time fluorescence PCR (qRT-PCR) and investigated the biological effects of PTENP1 in BC MDA-MB-231 cells by several in vitro experiments including CCK8, wound healing, transwell and Annexin V-FITC/PI analysis. Besides, the competing endogenous RNA (ceRNA) activity of PTENP1 on miR-19b was detected by luciferase reporter assay, and the expressions of related genes and proteins were determined by western blot assay and qRT-PCR...
July 21, 2017: Cancer Gene Therapy
https://www.readbyqxmd.com/read/28730337/memantine-can-reduce-ethanol-induced-caspase-3-activity-and-apoptosis-in-h4-cells-by-decreasing-intracellular-calcium
#5
Xiaolong Wang, Jiajun Chen, Hongbo Wang, Hao Yu, Changliang Wang, Jiabin You, Pengfei Wang, Chunmei Feng, Guohui Xu, Xu Wu, Rui Zhao, Guohua Zhang
Caspase-3 activation and apoptosis are associated with various neurodegenerative disorders. Calcium activation is an important factor in promoting apoptosis. We, therefore, assessed the role of intracellular calcium in ethanol-induced activation of caspase-3 in H4 human neuroglioma cells and the protective effect of the NMDA receptor antagonist, memantine, on ethanol-induced apoptosis in H4 cells. H4 cells were treated with 100 mM EtOH (in culture medium) for 2 days. For interaction studies, cells were treated with memantine (4 μM), EDTA (1 mM), or BAPTA-AM (10 μM) before treatment with EtOH...
July 20, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28730105/pigment-epithelium-derived-factor-protects-retinal-ganglion-cells-from-hypoxia-induced-apoptosis-by-preventing-mitochondrial-dysfunction
#6
Shu-Wei Tian, Yuan Ren, Jin-Zhi Pei, Bai-Chao Ren, Yuan He
AIM: To investigate the potential of pigment epithelium-derived factor (PEDF) to protect the immortalized rat retinal ganglion cells-5 (RGC-5) exposed to CoCl2-induced chemical hypoxia. METHODS: After being differentiated with staurosporine (SS), RGC-5 cells were cultured in four conditions: control group cells cultured in Dulbecco's modified eagle medium (DMEM) supplemented with 10% fetal bovine serum, 100 µmol/mL streptomycin and penicillin (named as normal conditions); hypoxia group cells cultured in DMEM containing 300 µmol/mL CoCl2; cells in the group protected by PEDF were first pretreated with 100 ng/mL PEDF for 2h and then cultured in the same condition as hypoxia group cells; and PEDF group cells that were cultured in the presence of 100 ng/mL PEDF under normal conditions...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28729093/pim-kinases-1-2-and-3-in-intracellular-lif-signalling-proliferation-and-apoptosis-in-trophoblastic-cells
#7
Stella Mary Photini, Wittaya Chaiwangyen, Maja Weber, Boodor Al-Kawlani, Rodolfo R Favaro, Udo Jeschke, Ekkehard Schleussner, Diana M Morales-Prieto, Udo R Markert
Proviral insertion in murine (PIM) lymphoma proteins are mainly regulated by the Janus Kinase/Signal Transducer Activator of Transcription (JAK/STAT) signaling pathway, which can be activated by members of the Interleukin-6 (IL-6) family, including Leukemia Inhibitory Factor (LIF). Aim of the study was to compare PIM1, PIM2 and PIM3 expression and potential cellular functions in human first and third trimester trophoblast cells, the immortalized first trimester extravillous trophoblast cell line HTR8/SVneo and the choriocarcinoma cell line JEG-3...
July 17, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28729092/annexin-a2-modulated-proliferation-of-pulmonary-arterial-smooth-muscle-cells-depends-on-caveolae-and-caveolin-1-in-hepatopulmonary-syndrome
#8
Lin Liao, Binwu Zheng, Bin Yi, Chang Liu, Lin Chen, Ziyang Zeng, Jing Gao
We have established that annexin A2 (ANXA2) is an important factor in the experimental hepatopulmonary syndrome (HPS) serum-induced proliferation of pulmonary arterial smooth muscle cells (PASMCs). However, the detailed mechanism remains unclear. ANXA2 translocated to the caveolin-enriched microdomains (caveolae) in PASMCs upon HPS serum stimulation. The disruption of caveolae by Methyl-β-cyclodextrin (MβCD) alleviated the caveolae recruitment of ANXA2 and the ANXA2-mediated activation of ERK1/2 and NF-κB, so that ANXA2-modulated PASMC proliferation was suppressed...
July 17, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28728976/effect-of-alkylaminophenols-on-growth-inhibition-and-apoptosis-of-bone-cancer-cells
#9
Phuong Doan, Tien Nguyen, Olli Yli-Harja, Nuno R Candeias, Meenakshisundaram Kandhavelu
In this work, we report the anticancer properties of a series of 11 chemically synthesized alkylaminophenols against human osteosarcoma U2OS tumor cell line. Several assays including cytotoxicity, inhibitor kinetic study, cell migration, Annexin-V/PI double staining, reactive oxygen species (ROS) and caspase 3/7 assays were conducted on this cell line. Cytotoxic 2-((3,4-dihydroquinolin-1(2H)-yl)(p-tolyl)methyl)phenol was determined to have an IC50 value of 36.6μM against U2OS cells and it also inhibits the cell growth in time-dependent manner...
July 17, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28728544/cladosporol-a-triggers-apoptosis-sensitivity-by-ros-mediated-autophagic-flux-in-human-breast-cancer-cells
#10
Mytre Koul, Ashok Kumar, Ramesh Deshidi, Vishal Sharma, Rachna D Singh, Jasvinder Singh, Parduman Raj Sharma, Bhawal Ali Shah, Sundeep Jaglan, Shashank Singh
BACKGROUND: Endophytes have proven to be an invaluable resource of chemically diverse secondary metabolites that act as excellent lead compounds for anticancer drug discovery. Here we report the promising cytotoxic effects of Cladosporol A (HPLC purified >98%) isolated from endophytic fungus Cladosporium cladosporioides collected from Datura innoxia. Cladosporol A was subjected to in vitro cytotoxicity assay against NCI60 panel of human cancer cells using MTT assay. We further investigated the molecular mechanism(s) of Cladosporol A induced cell death in human breast (MCF-7) cancer cells...
July 20, 2017: BMC Cell Biology
https://www.readbyqxmd.com/read/28727490/comparison-of-the-release-of-micrornas-and-extracellular-vesicles-from-platelets-in-response-to-different-agonists
#11
Ashley R Ambrose, Mohammed A Alsahli, Sameer A Kurmani, Alison H Goodall
On activation platelets release microRNAs and extracellular vesicles (EV) into circulation. The release of EV from platelets has been shown to be dependent on the agonist; in this study, we investigated whether the microRNA profile or EV released from platelets was also agonist specific. Washed platelets from healthy subjects were maximally stimulated with agonists specific for the receptors for collagen (Glycoprotein VI (GPVI)), thrombin (PAR1/PAR4), or ADP (P2Y1/P2Y12) with/without inhibiting secondary mediators, using aspirin to block cyclooxygenase-1 and apyrase to remove ADP...
July 20, 2017: Platelets
https://www.readbyqxmd.com/read/28726305/myb30-transcription-factor-regulates-oxidative-and-heat-stress-responses-through-annexin-mediated-cytosolic-calcium-signaling-in-arabidopsis
#12
Chancan Liao, Yuan Zheng, Yan Guo
Cytosolic calcium signaling is critical for regulating downstream responses in plants encountering unfavorable environmental conditions. In a genetic screen for Arabidopsis thaliana mutants defective in stress-induced cytosolic free Ca(2+) ([Ca(2+) ]cyt ) elevations, we identified the R2R3-MYB transcription factor MYB30 as a regulator of [Ca(2+) ]cyt in response to H2 O2 and heat stresses. Plants lacking MYB30 protein exhibited greater elevation of [Ca(2+) ]cyt in response to oxidative and heat stimuli. Real-time reverse transcription-polymerase chain reaction (RT-PCR) results indicated that the expression of a number of ANNEXIN (ANN) genes, which encode Ca(2+) -regulated membrane-binding proteins modulating cytosolic calcium signatures, were upregulated in myb30 mutants...
July 20, 2017: New Phytologist
https://www.readbyqxmd.com/read/28725241/mir-378-suppresses-the-proliferation-migration-and-invasion-of-colon-cancer-cells-by-inhibiting-sdad1
#13
Mingxi Zeng, Linlin Zhu, Liangping Li, Changming Kang
BACKGROUND: MicroRNAs (miRNAs) play important roles in the growth and metastasis of colon cancer. It is known that one set of miRNAs are dysregulated in colon cancer cells, but the mechanism of their role in cancer development is still largely unknown. Our study focuses on the role of miR-378 in colon cancer cells. METHODS: Human colon cancer tissues and adjacent non-tumor tissues were collected from patients diagnosed in pathological examinations. In addition, human colon cancer cell lines LoVo, CaCo2, SW1116, SW480 and HCT-116, and a normal colonic mucosa cell line NCM460 were included...
2017: Cellular & Molecular Biology Letters
https://www.readbyqxmd.com/read/28724795/alx-receptor-ligands-define-a-biochemical-endotype-for-severe-asthma
#14
Isabell Ricklefs, Ioanna Barkas, Melody G Duvall, Manuela Cernadas, Nicole L Grossman, Elliot Israel, Eugene R Bleecker, Mario Castro, Serpil C Erzurum, John V Fahy, Benjamin M Gaston, Loren C Denlinger, David T Mauger, Sally E Wenzel, Suzy A Comhair, Andrea M Coverstone, Merritt L Fajt, Annette T Hastie, Mats W Johansson, Michael C Peters, Brenda R Phillips, Bruce D Levy
BACKGROUND: In health, inflammation resolution is an active process governed by specialized proresolving mediators and receptors. ALX/FPR2 receptors (ALX) are targeted by both proresolving and proinflammatory ligands for opposing signaling events, suggesting pivotal roles for ALX in the fate of inflammatory responses. Here, we determined if ALX expression and ligands were linked to severe asthma (SA). METHODS: ALX expression and levels of proresolving ligands (lipoxin A4 [LXA4], 15-epi-LXA4, and annexin A1 [ANXA1]), and a proinflammatory ligand (serum amyloid A [SAA]) were measured in bronchoscopy samples collected in Severe Asthma Research Program-3 (SA [n = 69], non-SA [NSA, n = 51] or healthy donors [HDs, n = 47])...
July 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28724430/egfr-modulates-monounsaturated-fatty-acid-synthesis-through-phosphorylation-of-scd1-in-lung-cancer
#15
Jiqin Zhang, Fei Song, Xiaojing Zhao, Hua Jiang, Xiuqi Wu, Biao Wang, Min Zhou, Mi Tian, Bizhi Shi, Huamao Wang, Yuanhui Jia, Hai Wang, Xiaorong Pan, Zonghai Li
BACKGROUND: Epidermal growth factor receptor (EGFR), a well-known oncogenic driver, contributes to the initiation and progression of a wide range of cancer types. Aberrant lipid metabolism including highly produced monounsaturated fatty acids (MUFA) is recognized as a hallmark of cancer. However, how EGFR regulates MUFA synthesis in cancer remains elusive. This is the focus of our study. METHODS: The interaction between EGFR and stearoyl-CoA desaturase-1 (SCD1) was detected byco-immunoprecipitation...
July 19, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28723693/upregulation-of-microrna-876-induces-endothelial-cell-apoptosis-by-suppressing-bcl-xl-in-development-of-atherosclerosis
#16
Kaicheng Xu, Peng Liu, Yue Zhao
BACKGROUND/AIMS: The injury and apoptotic cell death of endothelial cells hallmark the development of atherosclerosis (AS), characterized by dysregulation of lipid homeostasis, immune responses, and formation of coronary plaques. However, the mechanisms underlying the initiation of endothelial cell apoptosis remain ill-defined. Recent evidence suggests a role of microRNAs in the processes of AS-associated endothelial cell apoptosis. Thus, we studied this question in the current study...
July 19, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28721818/eurycoma-longifolia-a-potential-phytomedicine-for-the-treatment-of-cancer-evidence-of-p53-mediated-apoptosis-in-cancerous-cells
#17
Hnin Ei Thu, Zahid Hussain, Isa Naina Mohamed, Ahmad Nazrun Shuid
BACKGROUND: Eurycoma longifolia is a well-documented herbal medicine that has gained widespread recognition due to its versatile pharmacological activities including anticancer, anti-malarial, antimicrobial, antioxidant, aphrodisiac, anti-inflammatory, anxiolytic, anti-diabetic, anti-rheumatism and anti-ulcer. Plethora of in vitro and in vivo studies evidenced their excellent anti-proliferative and anticancer efficacy against various types of human cancers. OBJECTIVE: This review was aimed to critically analyze the therapeutic viability and anticancer efficacy of Eurycoma longifolia in the treatment of cancer and also to propose its molecular and translational mechanism of cytotoxicity against cancerous cells...
July 18, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28721072/cxcl12-suppresses-cisplatin-induced-apoptosis-through-activation-of-jak2-stat3-signaling-in-human-non-small-cell-lung-cancer-cells
#18
Meng Wang, Tie Lin, Yicun Wang, Song Gao, Zhaoyang Yang, Xuan Hong, Gongyan Chen
AIMS: Poor efficacy of chemotherapy drugs in non-small-cell lung cancer (NSCLC) is the key reason for the failure of treatment, but the mechanism of this remains largely unknown. Stromal cell-derived factor 1-alpha (SDF-1α/CXCL12) is a small chemotactic cytokine protein that plays an important role in tumor progression. In this study, we investigated the anti-apoptotic mechanism of the CXCL12/CXCR4 axis in response to cisplatin, a commonly used chemotherapeutic drug, in human lung adenocarcinoma A549 cells...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28720835/exophagy-of-annexin-a2-via-rab11-rab8a-and-rab27a-in-ifn-%C3%AE-stimulated-lung-epithelial-cells
#19
Ying-Da Chen, Yi-Ting Fang, Yi-Lin Cheng, Chiou-Feng Lin, Li-Jin Hsu, Shu-Ying Wang, Robert Anderson, Chih-Peng Chang, Yee-Shin Lin
Annexin A2 (ANXA2), a phospholipid-binding protein, has multiple biological functions depending on its cellular localization. We previously demonstrated that IFN-γ-triggered ANXA2 secretion is associated with exosomal release. Here, we show that IFN-γ-induced autophagy is essential for the extracellular secretion of ANXA2 in lung epithelial cells. We observed colocalization of ANXA2-containing autophagosomes with multivesicular bodies (MVBs) after IFN-γ stimulation, followed by exosomal release. IFN-γ-induced exophagic release of ANXA2 could not be observed in ATG5-silenced or mutant RAB11-expressing cells...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720118/inhibiting-function-of-human-fetal-dermal-mesenchymal-stem-cells-on-bioactivities-of-keloid-fibroblasts
#20
Ya Jiao, Xiao Wang, Jixun Zhang, Yongjun Qi, Hongmin Gong, Duyin Jiang
BACKGROUND: Keloid is one kind of benign skin disease caused by hyperplasia of fibroblasts and collagen fibrils. It is refractory due to the lack of an effective treatment at present, which puts pressure on seeking a new therapeutic regimen. Mesenchymal stem cells (MSCs) from fetal skin are considered to play a crucial role in scarless healing. Nevertheless, the efficacy of them in keloid disorders remains poorly understood. METHODS: Keloid fibroblasts (KFs), human adult dermal fibroblasts (ADFs), and human fetal dermal mesenchymal stem cells (FDMSCs) were isolated to single cells and cultured in Dulbecco's modified Eagle's medium (DMEM)...
July 18, 2017: Stem Cell Research & Therapy
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