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https://www.readbyqxmd.com/read/28928845/exosomes-derived-from-bone-marrow-stromal-cells-decrease-the-sensitivity-of-leukemic-cells-to-etoposide
#1
Jianling Wang, Dong Li, Yong Zhuang, Jinqiu Fu, Xue Li, Qing Shi, Xiuli Ju
The aim of the study was to investigate the effect of exosomes derived from bone marrow stromal cells (BM-SCs) on the chemoresistant characteristics of nalm-6 cells treated with etoposide (VP16). The present study isolated exosomes from BM-SC-conditioned medium by using standard differential centrifugation steps and detected the expression of 70 kilodalton heat shock proteins (HSP70) and lysosomal-associated membrane protein 3 (CD63) in exosomes by western blot analysis. Nalm-6 cells were co-cultured with exosomes in the presence of VP16...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28916896/involvement-of-il-17-in-secondary-brain-injury-after-a-traumatic-brain-injury-in-rats
#2
Tan Li, Yong-Mei Zhang, Dong Han, Rong Hua, Bing-Nan Guo, Shu-Qun Hu, Xian-Liang Yan, Tie Xu
The pro-inflammatory activity of interleukin 17, which is produced by the IL-23/IL-17 axis, has been associated with the pathogenesis of traumatic brain injury (TBI). The study investigated the potential role of IL-17 in secondary brain injury of TBI in a rat model. Our data showed that the levels of IL-17 increased from 6 h to 7 days and peaked at 3 days, in both the CNS and serum, which were consistent with the severity of secondary brain injury. The IL-23 inhibitor suberoylanilide hydroxamic acid (SAHA) treatment markedly decreased the expressions of IL-17 and apoptosis-associated proteins cleaved caspase-3 and increased the protein ratio of Bcl-2 (B cell lymphoma/leukemia-2)/Bax (Bcl-2-associated X protein)...
September 15, 2017: Neuromolecular Medicine
https://www.readbyqxmd.com/read/28914393/costunolide-induces-micronuclei-formation-chromosomal-aberrations-cytostasis-and-mitochondrial-mediated-apoptosis-in-chinese-hamster-ovary-cells
#3
Soma Shiva Nageswara Rao Singireesu, Sunil Misra, Sujan Kumar Mondal, Suresh Yerramsetty, Nivedita Sahu, Suresh Babu K
Costunolide (CE) is a sesquiterpene lactone well-known for its antihepatotoxic, antiulcer, and anticancer activities. The present study focused on the evaluation of the cytogenetic toxicity and cellular death-inducing potential of CE in CHO cells, an epithelial cell line derived from normal ovary cells of Chinese hamster. The cytotoxic effect denoting MTT assay has shown an IC50 value of 7.56 μM CE, where 50% proliferation inhibition occurs. The oxidative stress caused by CE was confirmed based on GSH depletion induced cell death, conspicuously absent in N-acetylcysteine (GSH precursor) pretreated cells...
September 15, 2017: Cell Biology and Toxicology
https://www.readbyqxmd.com/read/28912867/protective-effect-of-controlled-release-of-cytokine-response-modifier-a-from-chitosan-microspheres-on-rat-chondrocytes-from-interleukin-1%C3%AE-induced-inflammation-and-apoptosis
#4
Pang-Hu Zhou, Lei Shi, Bo Qiu
The aim of the present study was to investigate the protective effect of cytokine response modifier A (CrmA) released from chitosan (CS) microspheres in a controlled manner on interleukin (IL)-1β-induced inflammation and apoptosis in chondrocytes. The CrmA release kinetics were characterized by an initial burst release, which was reduced to a linear release over 8 days. Furthermore, chondrocytes were isolated from 1-week-old Sprague Dawley rats. The cell culture was established by stimulation with 10 ng/ml IL-1β and subsequent incubation with CS-CrmA microspheres...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28903400/hyperglycemia-and-advanced-glycation-end-products-ages-suppress-the-differentiation-of-3t3-l1-preadipocytes
#5
Chia-Chu Chang, Chen-Yu Chen, Geen-Dong Chang, Ting-Huan Chen, Woan-Ling Chen, Hui-Chin Wen, Chih-Yang Huang, Chung-Ho Chang
Aging is characterized by mild hyperglycemia and accumulation of advanced glycation end products (AGEs). Effects of chronic exposure to hyperglycemia or AGEs on the adipogenic differentiation of 3T3-L1 preadipocytes remain unclear. We examined the chronic effect of AGEs and high glucose on the differentiation of 3T3-L1 cells by culturing 3T3-L1 cells in the presence of AGEs or 25 mM glucose for 1 month. Chronic incubation of 3T3-L1 cells with AGEs or high glucose blocked their differentiation into mature adipocytes as evidenced by reduced levels of adipocyte markers such as accumulated oil droplets, GPDH, aP2, adiponectin and of adipogenesis regulators PPARγ and C/EBPα...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28901387/triptolide-blocks-the-stat3-signaling-pathway-through-induction-of-protein-tyrosine-phosphatase-shp-1-in-multiple-myeloma-cells
#6
Ji-Hun Kim, Byoungduck Park
Triptolide, an active component extracted from the medicinal plant Tripterygium wilfordii Hook F., has been used to treat various diseases, including lupus, cancer, rheumatoid arthritis and nephritic syndrome. The present study investigated the effects of triptolide on multiple myeloma using western blotting and an electrophoretic mobility shift assay. Triptolide was found to suppress the inducible and constitutive activation of signal transducer and activator of transcription 3 (STAT3), which is closely associated with inflammation and tumorigenesis...
September 6, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28900281/oleic-acid-induces-apoptosis-and-autophagy-in-the-treatment-of-tongue-squamous-cell-carcinomas
#7
Lin Jiang, Wei Wang, Qianting He, Yuan Wu, Zhiyuan Lu, Jingjing Sun, Zhonghua Liu, Yisen Shao, Anxun Wang
Oleic acid (OA), a main ingredient of Brucea javanica oil (BJO), is widely known to have anticancer effects in many tumors. In this study, we investigated the anticancer effect of OA and its mechanism in tongue squamous cell carcinoma (TSCC). We found that OA effectively inhibited TSCC cell proliferation in a dose- and time-dependent manner. OA treatment in TSCC significantly induced cell cycle G0/G1 arrest, increased the proportion of apoptotic cells, decreased the expression of CyclinD1 and Bcl-2, and increased the expression of p53 and cleaved caspase-3...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28894506/a-cystine-rich-whey-supplement-immunocal%C3%A2-provides-neuroprotection-from-diverse-oxidative-stress-inducing-agents-in-vitro-by-preserving-cellular-glutathione
#8
Aimee N Winter, Erika K Ross, Vamsi Daliparthi, Whitney A Sumner, Danielle M Kirchhof, Evan Manning, Heather M Wilkins, Daniel A Linseman
Oxidative stress is a principal mechanism underlying the pathophysiology of neurodegeneration. Therefore, nutritional enhancement of endogenous antioxidant defenses may represent a viable treatment option. We investigated the neuroprotective properties of a unique whey protein supplement (Immunocal®) that provides an essential precursor (cystine) for synthesis of the endogenous antioxidant, glutathione (GSH). Primary cultures of rat cerebellar granule neurons (CGNs), NSC34 motor neuronal cells, or HT22 hippocampal cells were preincubated in medium containing Immunocal and then subsequently treated with agents known to induce oxidative stress...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28888620/the-caspase-8-bid-cytochrome-c-axis-links-signals-from-death-receptors-to-mitochondrial-reactive-oxygen-species-production
#9
Wan-Sung Kim, Kwang-Soon Lee, Ji-Hee Kim, Chun-Ki Kim, Gwangsoo Lee, Jongseon Choe, Moo-Ho Won, Tae-Hyoung Kim, Dooil Jeoung, Hansoo Lee, Ji-Yoon Kim, Mi Ae Jeong, Kwon-Soo Ha, Young-Guen Kwon, Young-Myeong Kim
Ligation of the death receptors for TNF-α, FasL, and TRAIL triggers two common pathways, caspase-dependent intrinsic apoptosis and intracellular reactive oxygen species (ROS) generation. The apoptotic pathway is well characterized; however, a signaling linker between the death receptor and ROS production has not been clearly elucidated. Here, we found that death receptor-induced ROS generation was strongly inhibited by mitochondrial complex I and II inhibitors, but not by inhibitors of NADPH oxidase, lipoxygenase, cyclooxygenase or xanthine oxidase, indicating that ROS are mostly generated by the impairment of the mitochondrial respiratory chain...
September 6, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28882984/transient-apoptosis-inhibition-in-donor-stem-cells-improves-hematopoietic-stem-cell-transplantation
#10
Matthias Kollek, Gesina Voigt, Christian Molnar, Fabronia Murad, Daniela Bertele, Christopher Felix Krombholz, Sheila Bohler, Verena Labi, Stefan Schiller, Mirjam Kunze, Stephan Geley, Charlotte M Niemeyer, Ana Garcia-Saez, Miriam Erlacher
During hematopoietic stem cell transplantation, a substantial number of donor cells are lost because of apoptotic cell death. Transplantation-associated apoptosis is mediated mainly by the proapoptotic BCL-2 family proteins BIM and BMF, and their proapoptotic function is conserved between mouse and human stem and progenitor cells. Permanent inhibition of apoptosis in donor cells caused by the loss of these BH3-only proteins improves transplantation outcome, but recipients might be exposed to increased risk of lymphomagenesis or autoimmunity...
September 7, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28881653/identification-of-novel-small-molecule-beclin-1-mimetics-activating-autophagy
#11
Jia Yu, Lan Lan, Seth J Lewin, Steven A Rogers, Anuradha Roy, Xiaoqing Wu, Philip Gao, John Karanicolas, Jeffrey Aubé, Baiwang Sun, Liang Xu
Anti-apoptotic proteins Bcl-2 and Bcl-xL could block autophagy by binding to Beclin 1 protein, an essential inducer of autophagy. Compounds mimicking Beclin 1 might be able to disrupt Bcl-xL/2-Beclin 1 interaction, free out Beclin 1, and thus trigger autophagy. In order to identify small molecule Beclin 1 mimetics, a fluorescence polarization-based high-throughput screening of 50,316 compounds was carried out with a Z' score of 0.82 ± 0.05, and an outcome of 58 hits. After the structure analysis, three acridine analogues were unveiled and confirmed using the fluorescence polarization assay and the surface plasmon resonance assay...
August 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28878358/enoyl-coa-hydratase-1-regulates-mtor-signaling-and-apoptosis-by-sensing-nutrients
#12
Ya-Kun Zhang, Yuan-Yuan Qu, Yan Lin, Xiao-Hui Wu, Hou-Zao Chen, Xu Wang, Kai-Qiang Zhou, Yun Wei, Fushen Guo, Cui-Fang Yao, Xia-Di He, Li-Xia Liu, Chen Yang, Zong-Yuan Guan, Shi-Dong Wang, Jianyuan Zhao, De-Pei Liu, Shi-Min Zhao, Wei Xu
The oncogenic mechanisms of overnutrition, a confirmed independent cancer risk factor, remain poorly understood. Herein, we report that enoyl-CoA hydratase-1 (ECHS1), the enzyme involved in the oxidation of fatty acids (FAs) and branched-chain amino acids (BCAAs), senses nutrients and promotes mTOR activation and apoptotic resistance. Nutrients-promoted acetylation of lys(101) of ECHS1 impedes ECHS1 activity by impairing enoyl-CoA binding, promoting ECHS1 degradation and blocking its mitochondrial translocation through inducing ubiquitination...
September 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/28870600/interleukin-10-enhanced-cd8-t-cell-activity-and-reduced-cd8-t-cell-apoptosis-in-patients-with-diffuse-large-b-cell-lymphoma
#13
Huiying Qiu, Xiaoxia Hu, Lei Gao, Li Chen, Jie Chen, Joanna Yuan, Chongmei Huang, Xiaoqian Xu, Jianmin Yang
The pleiotropic cytokine interleukin (IL)-10 is best characterized by its ability to downregulate inflammation and promote peripheral tolerance. On the other hand, IL-10 was also found to maintain the effector response of CD8(+) T cells and promote the expansion of tumor-resident CD8(+) T cells. In diffuse large B cell lymphoma (DLBCL), the role of IL-10 has been characterized in tumor cells but not in CD8(+) T cells. We found that CD8(+) T cells in DLBCL presented robust interferon (IFN)-γ expression early during TCR-activation but could not maintain this response later on, which was characterized by significantly lower CD8(+) T cell degranulation and higher apoptosis...
September 1, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28859986/kribb11-accelerates-mcl-1-degradation-through-an-hsf1-independent-mule-dependent-pathway-in-a549-non-small-cell-lung-cancer-cells
#14
Min-Jung Kang, Hye Hyeon Yun, Jeong-Hwa Lee
The Bcl-2 family protein, Mcl-1 is known to have anti-apoptotic functions, and depletion of Mcl-1 by cellular stresses favors the apoptotic process. Moreover, Mcl-1 levels are frequently increased in various cancer cells, including non-small cell lung cancer (NSCLC), and is implicated in resistance to conventional chemotherapy and in cancer metastasis. In this study, we demonstrated that KRIBB11 accelerates the proteasomal degradation of Mcl-1 in the NSCLC cell line, A549. While KRIBB11 is an inhibitor of HSF1, we found that KRIBB11 induced Mcl-1 degradation in an HSF1-independent manner...
August 29, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28859148/stellate-ganglion-block-attenuates-chronic-stress-induced-depression-in-rats
#15
Weiwei Wang, Weidong Shi, Hua Qian, Xijin Deng, Tong Wang, Wenzhi Li
BACKGROUND: Stress is a significant factor in the etiology of depression. Stellate ganglion block (SGB) has been shown to maintain the stability of the autonomic system and to affect the neuroendocrine system, including the hypothalamic-pituitary-adrenal (HPA) axis. The objective of this study was to determine the antidepressant-like effects of SGB on the autonomic system and the HPA axis, apoptosis-related proteins, related spatial learning and memory impairment, and sensorimotor dysfunction...
2017: PloS One
https://www.readbyqxmd.com/read/28856835/the-role-s-nitrosylation-in-manganese-induced-autophagy-dysregulation-in-sh-sy5y-cells
#16
Zhuo Ma, Can Wang, Chang Liu, Dong-Ying Yan, Yu Deng, Wei Liu, Tian-Yao Yang, Zhao-Fa Xu, Bin Xu
Overexposure to manganese (Mn) has been known to induce nitrosative stress. The dysregulation of autophagy has implicated in nitric oxide (NO) bioactivity alterations. However, the mechanism of Mn-induced autophagic dysregulation is unclear. The protein of Bcl-2 was considered as a key role that could participate to the autophagy signaling regulation. To further explore whether S-nitrosylation of Bcl-2 involved in Mn-induced autophagy dysregulation, we treated human neuroblastoma (SH-SY5Y) cells with Mn and pretreated cells with 1400 W, a selective iNOS inhibitor...
August 30, 2017: Environmental Toxicology
https://www.readbyqxmd.com/read/28854965/adipose-stem-cells-from-chronic-pancreatitis-patients-improve-mouse-and-human-islet-survival-and-function
#17
Lili Song, Zhen Sun, Do-Sung Kim, Wenyu Gou, Charlie Strange, Huansheng Dong, Wanxing Cui, Gary Gilkeson, Katherine A Morgan, David B Adams, Hongjun Wang
BACKGROUND: Chronic pancreatitis has surgical options including total pancreatectomy to control pain. To avoid surgical diabetes, the explanted pancreas can have islets harvested and transplanted. Immediately following total pancreatectomy with islet autotransplantation (TP-IAT), many islet cells die due to isolation and transplantation stresses. The percentage of patients remaining insulin free after TP-IAT is therefore low. We determined whether cotransplantation of adipose-derived mesenchymal stem cells (ASCs) from chronic pancreatitis patients (CP-ASCs) would protect islets after transplantation...
August 30, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28852176/a-novel-chalcone-derivative-s17-induces-apoptosis-through-ros-dependent-dr5-up-regulation-in-gastric-cancer-cells
#18
Saiyang Zhang, Tingyu Li, Li Zhang, Xiangyu Wang, Hangqi Dong, Lili Li, Dongjun Fu, Yongchun Li, Xiaolin Zi, Hong-Min Liu, Yanbing Zhang, Hongde Xu, Cheng-Yun Jin
A new series of etherification chalcone derivatives were designed and synthesized through Willimison etherification and Claisen-Schmidt condensation. Among them, compound 2-c which was given chemical name of S17, has been successfully screened out as the most potent one on gastric cancer cell line(MGC803) through the investigation for their effects against the growth of five cancer cell lines (EC109, HepG2, MCF7, MGC803, SKNSH). S17 exhibited strong anti-proliferative activity on other two gastric cancer cells (HGC27 and SGC7901), but less cytotoxicity to non-malignant gastric epithelial cells GES1...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28840766/immunohistochemical-and-molecular-imaging-biomarker-signature-for-the-prediction-of-failure-site-after-chemoradiation-for-head-and-neck-squamous-cell-carcinoma
#19
Gregers Brünnich Rasmussen, Katrin E Håkansson, Ivan R Vogelius, Jacob H Rasmussen, Jeppe T Friborg, Barbara M Fischer, Lisa Schumaker, Kevin Cullen, Marianne H Therkildsen, Søren M Bentzen, Lena Specht
OBJECTIVE: To identify a failure site-specific prognostic model by combining immunohistochemistry (IHC) and molecular imaging information to predict long-term failure type in squamous cell carcinoma of the head and neck. PATIENT AND METHODS: Tissue microarray blocks of 196 head and neck squamous cell carcinoma cases were stained for a panel of biomarkers using IHC. Gross tumor volume (GTV) from the PET/CT radiation treatment planning CT scan, maximal Standard Uptake Value (SUVmax) of fludeoxyglucose (FDG) and clinical information were included in the model building using Cox proportional hazards models, stratified for p16 status in oropharyngeal carcinomas...
August 25, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28840508/the-roles-of-microrna-34b-5p-in-angiogenesis-of-thyroid-carcinoma
#20
Hamidreza Maroof, Farhadul Islam, Armin Ariana, Vinod Gopalan, Alfred K Lam
PURPOSE: This study aims to determine the expression of miR-34b-5p in thyroid carcinomas and to investigate the role of miR34b-5p in the modulation of proteins involved in angiogenesis of thyroid carcinoma cells. METHODS: The expressions of miR-34b-5p levels in five cell lines and 65 tissue samples from thyroid carcinomas were examined by real-time polymerase chain reaction. An exogenous miR-34b-5p (mimic) transiently overexpress miR-34b-5p in theses thyroid carcinoma cells...
August 24, 2017: Endocrine
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