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https://www.readbyqxmd.com/read/29765528/metabolic-changes-associated-with-metformin-potentiates-bcl-2-inhibitor-venetoclax-and-cdk9-inhibitor-bay1143572-and-reduces-viability-of-lymphoma-cells
#1
Vineela Chukkapalli, Leo I Gordon, Parameswaran Venugopal, Jeffrey A Borgia, Reem Karmali
Metformin exerts direct anti-tumor effects by activating AMP-activated protein kinase (AMPK), a major sensor of cellular metabolism in cancer cells. This, in turn, inhibits pro-survival mTOR signaling. Metformin has also been shown to disrupt complex 1 of the mitochondrial electron transport chain. Here, we explored the lymphoma specific anti-tumor effects of metformin using Daudi (Burkitt), SUDHL-4 (germinal center diffuse large B-cell lymphoma; GC DLBCL), Jeko-1 (Mantle-cell lymphoma; MCL) and KPUM-UH1 (double hit DLBCL) cell lines...
April 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29753740/2-deoxy-d-glucose-increases-gfat1-phosphorylation-resulting-in-endoplasmic-reticulum-related-apoptosis-via-disruption-of-protein-n-glycosylation-in-pancreatic-cancer-cells
#2
Kousuke Ishino, Mitsuhiro Kudo, Wei-Xia Peng, Shoko Kure, Kiyoko Kawahara, Kiyoshi Teduka, Yoko Kawamoto, Taeko Kitamura, Takenori Fujii, Tetsushi Yamamoto, Ryuichi Wada, Zenya Naito
The glycolytic inhibitor 2-deoxy-d-glucose (2DG) causes energy starvation, affecting cell viability in a wide range of cancer cell lines. To determine the action of 2DG in pancreatic cancer, we performed proteomic analysis of pancreatic cancer cell line after 2DG treatment. Eighty proteins showed differential expression and among these, proteins involved in phosphohexose metabolism were upregulated. Up-regulation of glutamine: fructose 6-phosphate aminotransferase 1 (GFAT1), which belongs to the hexosamine biosynthesis pathway (HBP) that produces uridine diphosphate N-acetylglucosamine (UDP-GlcNAc) to maintain glycoprotein, was validated by evaluation of mRNA and protein levels...
May 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29749796/nuclear-tp53-an-unraveled-function-as-transcriptional-repressor-of-pink1
#3
Frédéric Checler, Thomas Goiran, Cristine Alves da Costa
The tumor suppressor TP53/p53 is a key protein in both neurodegenerative diseases and cancer. Thus, TP53-linked cell death appears exacerbated in several age-related neuropathologies, while TP53 mutation-associated phenotypes indicate a loss of function accounting for approximately half of cancers. Thus, TP53 plays a pivotal role in these phenotypically distinct pathologies, a hypothesis reinforced by recent epidemiological studies suggesting an opposite risk to develop one type of pathology relative to the other...
May 11, 2018: Autophagy
https://www.readbyqxmd.com/read/29743983/chemotherapeutic-drugs-and-mitochondrial-dysfunction-focus-on-doxorubicin-trastuzumab-and-sunitinib
#4
REVIEW
Stefania Gorini, Antonella De Angelis, Liberato Berrino, Natalia Malara, Giuseppe Rosano, Elisabetta Ferraro
Many cancer therapies produce toxic side effects whose molecular mechanisms await full elucidation. The most feared and studied side effect of chemotherapeutic drugs is cardiotoxicity. Also, skeletal muscle physiology impairment has been recorded after many chemotherapeutical treatments. However, only doxorubicin has been extensively studied for its side effects on skeletal muscle. Chemotherapeutic-induced adverse side effects are, in many cases, mediated by mitochondrial damage. In particular, trastuzumab and sunitinib toxicity is mainly associated with mitochondria impairment and is mostly reversible...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29740925/metformin-directly-targets-the-h3k27me3-demethylase-kdm6a-utx
#5
Elisabet Cuyàs, Sara Verdura, Laura Llorach-Pares, Salvador Fernández-Arroyo, Fedra Luciano-Mateo, Noemí Cabré, Jan Stursa, Lukas Werner, Begoña Martin-Castillo, Benoit Viollet, Jiri Neuzil, Jorge Joven, Alfons Nonell-Canals, Melchor Sanchez-Martinez, Javier A Menendez
Metformin, the first drug chosen to be tested in a clinical trial aimed to target the biology of aging per se, has been clinically exploited for decades in the absence of a complete understanding of its therapeutic targets or chemical determinants. We here outline a systematic chemoinformatics approach to computationally predict biomolecular targets of metformin. Using several structure- and ligand-based software tools and reference databases containing 1,300,000 chemical compounds and more than 9,000 binding sites protein cavities, we identified 41 putative metformin targets including several epigenetic modifiers such as the member of the H3K27me3-specific demethylase subfamily, KDM6A/UTX...
May 8, 2018: Aging Cell
https://www.readbyqxmd.com/read/29736310/depletion-of-gamma-glutamylcyclotransferase-in-cancer-cells-induces-autophagy-followed-by-cellular-senescence
#6
Keiko Taniguchi, Kengo Matsumura, Hiromi Ii, Susumu Kageyama, Eishi Ashihara, Tokuhiro Chano, Akihiro Kawauchi, Tatsuhiro Yoshiki, Susumu Nakata
Gamma-glutamylcyclotransferase (GGCT) was originally identified as a protein highly expressed in bladder cancer tissues by proteomic analysis, and its higher expression in a variety of cancers compared to normal tissues have been shown. Depletion of GGCT in various cancer cells results in antiproliferative effects both in vitro and in vivo ; thus it is considered a promising therapeutic target. Although it has been shown that knockdown of GGCT induces cellular senescence and non-apoptotic cell death, associated with upregulation of cyclin-dependent kinase inhibitors (CDKIs) including p21WAF1/CIP1 , the cellular events that follow GGCT depletion are not fully understood...
2018: American Journal of Cancer Research
https://www.readbyqxmd.com/read/29735437/-effect-of-cordycepin-on-apoptosis-and-autophagy-of-tongue-cancer-cells-in-vitro-and-the-molecular-mechanism
#7
Qing-Wei Zheng, Shu-Xian Gao, Jie Lv, Deng-Yu Chen, Jie Chen, Hui-Hui Li, Jun-Chang Guan
OBJECTIVE: To study the effect of cordycepin on cell cycle, apoptosis and autophagy of human tongue cancer TCA-8113 cells and explore the mechanism of cordycepin for inhibiting the occurrence of tongue cancer. METHODS: CCK-8 method was used to assess the inhibitory effect of cordycepin on TCA-8113 cell proliferation in vitro. The cell cycle and cell apoptosis of TCA-8113 cells treated with different concentrations of cordycepin were analyzed using flow cytometry...
April 20, 2018: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/29722086/apoptotic-effect-of-lambertianic-acid-through-ampk-foxm1-signaling-in-mda-mb231-breast-cancer-cells
#8
Jae Hee Lee, Hyo-Jung Lee, Deok Yong Sim, Ji Hoon Jung, Ka Ram Kim, Sung-Hoon Kim
Though lambertianic acid (LA) was known to exert antitumor effect in liver and prostate cancers, its underlying anticancer mechanism is never reported in breast cancers so far. Thus, in this study, apoptotic mechanism of LA was elucidated in MDA-MB-231 breast cancer cells. Here, LA increased cytotoxicity in MCF-7 and MDA-MB-231 cells; enhanced sub-G1 population, G2/M arrest, and cleaved poly(ADP-ribose) polymerase; activated phosphorylation of AMP-activated protein kinase (AMPK)/acetyl-CoA carboxylase pathway; and also suppressed phosphorylation of AKT and the expression of forkhead box M1 (FOXM1), X-linked inhibitor of apoptosis protein, B-cell lymphoma 2, and CyclinB1 in MDA-MB-231 cells...
May 2, 2018: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29710489/physcion-induces-apoptosis-through-triggering-endoplasmic-reticulum-stress-in-hepatocellular-carcinoma
#9
Xiao-Ping Pan, Chen Wang, Yan Li, Li-Hua Huang
Hepatocellular carcinoma (HCC) is one of the most common and aggressive malignancies. The current study aimed to investigate the effect of physcion, a major active ingredient in several traditional herbal medicinal plants, for the treatment of HCC. Our data showed that physcion markedly induced apoptosis in human HCC cell lines Huh7 and Bel7402. The pro-apoptotic role of physcion on HCC cells was mediated by mitochondria dysfunction, which was caused by activation of endoplasmic reticulum(ER) stress. Moreover, our findings revealed that physcion stimulated ER stress by activating AMPK signaling...
March 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29709909/induction-of-apoptosis-by-citrus-unshiu-peel-in-human-breast-cancer-mcf-7-cells-involvement-of-ros-dependent-activation-of-ampk
#10
Min Yeong Kim, Hyun Hwang Bo, Eun Ok Choi, Da He Kwon, Hong Jae Kim, Kyu Im Ahn, Seon Yeong Ji, Jin-Woo Jeong, Shin-Hyung Park, Su-Hyun Hong, Gi-Young Kim, Cheol Park, Heui-Soo Kim, Sung-Kwon Moon, Seok-Joong Yun, Wun Jae Kim, Yung Hyun Choi
The fruit of Citrus unshiu MARKOVICH used for various purposes in traditional medicine has various pharmacological properties including antioxidant, anti-inflammatory, and antibacterial effects. Recently, the possibility of anti-cancer activity of the extracts or components of this fruit has been reported; however, the exact mechanism has not yet been fully understood. In this study, we evaluated the anti-proliferative effect of water extract of C. unshiu peel (WECU) on human breast cancer MCF-7 cells and investigated the underlying mechanism...
2018: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29709726/rna-sequencing-reveals-significant-mirnas-in-atypical-endometrial-hyperplasia
#11
Shiqian Tang, Yinmei Dai
PURPOSE: In this paper, we aimed to investigate the miRNAs that played a regulatory role in the development of atypical endometrial hyperplasia (AEH). METHODS: RNA sequencing was performed for endometrial tissues from 3 AEH patients and 3 endometrial normal hyperplasia patients. RNA sequencing data were processed and differentially expressed (DE) miRNAs were identified between AEH and controls. The target genes for DE miRNAs were identified and mapped to the protein-protein interaction (PPI) network...
March 19, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29705631/metabolic-switching-in-the-hypoglycemic-and-antitumor-effects-of-metformin-on-high-glucose-induced-hepg2-cells
#12
Yan Lv, Na Tian, Junsong Wang, Minghua Yang, Lingyi Kong
Metformin, a widely prescribed drug for the management of type 2 diabetes mellitus, has potential anticancer effect. Diabetes patients regularly taking metformin have been reported with decreased cancer risk and improved cancer prognosis in recent years. A cell model of high glucose induced HepG2 cells was conducted to mimic insulin resistance, and a 1 H NMR-based metabolomics approach in conjunction with molecular biology was performed to investigate the metabolic changes of high glucose induced HepG2 cells in response to different doses of metformin treatment and to study the differences and links between hypoglycemic and antitumor effects of metformin...
April 21, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29702405/regulation-of-ampk-related-glycolipid-metabolism-imbalances-redox-homeostasis-and-inhibits-anchorage-independent-growth-in-human-breast-cancer-cells
#13
Lin Yang, Zihao He, Jingyue Yao, Renxiang Tan, Yejin Zhu, Zhiyu Li, Qinglong Guo, Libin Wei
Breast cancer is one of the most lethal tumors in the world, among which 15% are triple-negative breast cancers (TNBCs) with higher metastasis and lower survival rate. Anoikis resistance is a key process during tumor metastasis, which is usually accompanied with metabolism reprogram. In this study, we established an anchorage independent growth model for MDA-MB-231 cells and investigated the changes in metabolism and redox homeostasis. Results showed that during detached-growth, MDA-MB-231 cells tend to generate ATP through fatty acid oxidation (FAO), instead of glycolysis...
April 18, 2018: Redox Biology
https://www.readbyqxmd.com/read/29695504/amp-activated-protein-kinase-selectively-inhibited-by-the-type-ii-inhibitor-sbi-0206965
#14
Toby A Dite, Christopher G Langendorf, Ashfaqul Hoque, Sandra Galic, Richard J Rebello, Ashley J Ovens, Lisa M Lindqvist, Kevin R W Ngoei, Naomi X Y Ling, Luc Furic, Bruce E Kemp, John Walter Scott, Jonathan S Oakhill
Inhibition of the metabolic regulator AMP-activated protein kinase (AMPK) is increasingly being investigated for its therapeutic potential in diseases where AMPK hyperactivity results in poor prognoses, as in established cancers and neurodegeneration. However, AMPK-inhibitory tool compounds are largely limited to compound C, which has a poor selectivity profile. Here we identify the pyrimidine derivative SBI-0206965 as a direct AMPK inhibitor. SBI-0206965 inhibits AMPK with 40-fold greater potency, and markedly lower kinase promiscuity, than compound C, and inhibits cellular AMPK signalling...
April 25, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29694835/antihypertensive-drug-candesartan-attenuates-trail-resistance-in-human-lung-cancer-via-ampk-mediated-inhibition-of-autophagy-flux
#15
Mohammad Rasheduzzaman, Sang-Youel Park
Angiotensin II type 1 receptor blockers (ARBs) are widely used as antihypertensive drugs. Candesartan is an ARB that has also been known for its anticancer effects but the exact molecular mechanism is remaining elusive. In this research, we showed for the first time that candesartan treatment significantly sensitized human lung adenocarcinoma cells to Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-mediated apoptosis by targeting TRAIL-DR5. TRAIL selectively kills cancer cells by binding to death receptors on the cell membrane, beyond the levels causing minimal toxicity in normal cells...
April 22, 2018: Experimental Cell Research
https://www.readbyqxmd.com/read/29682330/yes-associated-protein-yap-in-pancreatic-cancer-at-the-epicenter-of-a-targetable-signaling-network-associated-with-patient-survival
#16
Enrique Rozengurt, James Sinnett-Smith, Guido Eibl
Pancreatic ductal adenocarcinoma (PDAC) is generally a fatal disease with no efficacious treatment modalities. Elucidation of signaling mechanisms that will lead to the identification of novel targets for therapy and chemoprevention is urgently needed. Here, we review the role of Yes-associated protein (YAP) and WW-domain-containing Transcriptional co-Activator with a PDZ-binding motif (TAZ) in the development of PDAC. These oncogenic proteins are at the center of a signaling network that involves multiple upstream signals and downstream YAP-regulated genes...
2018: Signal Transduction and Targeted Therapy
https://www.readbyqxmd.com/read/29675103/mir-490-3p-functions-as-a-tumor-suppressor-by-inhibiting-oncogene-vdac1-expression-in-colorectal-cancer
#17
Xiangxiang Liu, Bangshun He, Tao Xu, Yuqin Pan, Xiuxiu Hu, Xiaoxiang Chen, Shukui Wang
Colorectal cancer (CRC) is one of the most common cancers worldwide, usually with poor prognosis because many CRC patients are diagnosed at an advanced stage. Therefore, novel potential diagnostic and prognostic biomarkers are urgently needed. MicroRNAs have been reported to regulate a variety of biological processes, such as cell proliferation, differentiation and apoptosis. Accumulating studies have demonstrated that miR-490-3p could regulate the development and progression of multiple cancers, but its clinical significance and molecular mechanism in CRC are still elusive...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29667627/propofol-inhibits-hela-cells-by-impairing-autophagic-flux-via-amp-activated-protein-kinase-ampk-activation-and-endoplasmic-reticulum-stress-regulated-by-calcium
#18
Xi Chen, Kai Li, Guoqing Zhao
BACKGROUND Propofol has antitumor effects against various cancers. However, the mechanism of action of propofol in HeLa human cervical cancer cells has not been elucidated. MATERIAL AND METHODS We treated HeLa human cervical cancer cells with different concentrations of propofol. Cell viability was evaluated with Cell Counting Kit-8 and apoptosis was analyzed by annexin V-fluorescein isothiocyanate and propidium iodide staining and flow cytometry. Autophagosome formation was evaluated based on microtubule-associated protein light chain (LC)3 conversion and light chain 3 puncta formation...
April 18, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29665787/valproic-acid-sensitizes-metformin-resistant-human-renal-cell-carcinoma-cells-by-upregulating-h3-acetylation-and-emt-reversal
#19
Muyun Wei, Shaowei Mao, Guoliang Lu, Liang Li, Xiaopeng Lan, Zhongxian Huang, Yougen Chen, Miaoqing Zhao, Yueran Zhao, Qinghua Xia
BACKGROUND: Metformin (Met) is a widely available diabetic drug and shows suppressed effects on renal cell carcinoma (RCC) metabolism and proliferation. Laboratory studies in RCC suggested that metformin has remarkable antitumor activities and seems to be a potential antitumor drug. But the facts that metformin may be not effective in reducing the risk of RCC in cancer clinical trials made it difficult to determine the benefits of metformin in RCC prevention and treatment. The mechanisms underlying the different conclusions between laboratory experiments and clinical analysis remains unclear...
April 17, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29665353/tripartite-motif-31-promotes-resistance-to-anoikis-of-hepatocarcinoma-cells-through-regulation-of-p53-ampk-axis
#20
Pengbo Guo, Yumin Qiu, Xiaomin Ma, Tao Li, Xiaoxiao Ma, Lihui Zhu, Yueke Lin, Lihui Han
Anoikis-resistance is an essential feature of cancer cells to obtain successful metastasis, whereas the molecular mechanism involved in this process of hepatocellular carcinoma (HCC) cells is not fully understood. Here we demonstrated that tripartite motif-containing (TRIM) 31, a new member of the TRIM family, was significantly upregulated in the anchorage-deprived HCC cells compared with their attached counterpart. When we blocked TRIM31 expression by its specific interference RNAs, the anoikis-resistance of HCC cells was significantly reversed...
April 14, 2018: Experimental Cell Research
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