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https://www.readbyqxmd.com/read/28747559/breast-cancer-suppression-by-aplysin-is-associated-with-inhibition-of-pi3k-akt-foxo3a-pathway
#1
Xinling Zhang, Tingting Zhuang, Zhengyan Liang, Li Li, Meilan Xue, Jia Liu, Hui Liang
Aplysin, a bromosesquiterpene isolated from Aplysia kurodai, was explored as a potential anti-breast cancer agent by us. However, the mechanisms underlying the anticarcinogenic effect of aplysin remain unclear. Here, aplysin was found to remarkably suppress tumor growth in vivo, inhibit cell proliferation and promote apoptosis in vitro. Additionally, we demonstrated that aplysin attained these effects in part by down-regulating PI3K/AKT/FOXO3a signaling pathway. Aplysin treatment inhibited the phosphorylation levels of AKT (Ser-473) and AKT-dependent phosphorylation of FOXO3a (Ser-253) in breast cancer cell lines and breast cancer tissues...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28731278/knockdown-of-long-non-coding-rna-meg3-protects-h9c2-cells-from-hypoxia-induced-injury-by-targeting-microrna-183
#2
Licheng Gong, Haiming Xu, Hong Chang, Yaliang Tong, Tao Zhang, Gongliang Guo
Acute myocardial infarction (AMI) occurs when blood supply to the heart is diminished (ischemia) for long time, and ischemia is primarily caused due to hypoxia. This study evaluated the effects of long non-coding RNA maternally expressed gene 3 (MEG3) on hypoxic rat cardiomyocyte-drived H9c2 cells. Hypoxic injury was confirmed by alterations of cell viability, migration, invasion, apoptosis and hypoxia-inducible factor 1α (HIF-1α) expression. MEG3 level in hypoxic cells and effects of its knockdown on hypoxic cells were assessed...
July 21, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28719590/pericyte-expressed-tie2-controls-angiogenesis-and-vessel-maturation
#3
Martin Teichert, Laura Milde, Annegret Holm, Laura Stanicek, Nicolas Gengenbacher, Soniya Savant, Tina Ruckdeschel, Zulfiyya Hasanov, Kshitij Srivastava, Junhao Hu, Stella Hertel, Arne Bartol, Katharina Schlereth, Hellmut G Augustin
The Tie receptors with their Angiopoietin ligands act as regulators of angiogenesis and vessel maturation. Tie2 exerts its functions through its supposed endothelial-specific expression. Yet, Tie2 is also expressed at lower levels by pericytes and it has not been unravelled through which mechanisms pericyte Angiopoietin/Tie signalling affects angiogenesis. Here we show that human and murine pericytes express functional Tie2 receptor. Silencing of Tie2 in pericytes results in a pro-migratory phenotype. Pericyte Tie2 controls sprouting angiogenesis in in vitro sprouting and in vivo spheroid assays...
July 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28701867/effects-of-korean-ginseng-berry-on-skin-antipigmentation-and-antiaging-via-foxo3a-activation
#4
Juewon Kim, Si Young Cho, Su Hwan Kim, Donghyun Cho, Sunmi Kim, Chan-Woong Park, Takahiko Shimizu, Jae Youl Cho, Dae Bang Seo, Song Seok Shin
BACKGROUND: The ginseng berry has various bioactivities, including antidiabetic, anticancer, antiinflammatory, and antioxidative properties. Moreover, we have revealed that the active antiaging component of the ginseng berry, syringaresinol, has the ability to stimulate longevity via gene activation. Despite the many known beneficial effects of ginseng, its effects on skin aging are poorly understood. In this study, we investigated the effects of ginseng and the ginseng berry on one of the skin aging processes, melanogenesis, and age-related pigment lipofuscin accumulation, to elucidate the mechanism of action with respect to antiaging...
July 2017: Journal of Ginseng Research
https://www.readbyqxmd.com/read/28701864/induction-of-forkhead-class-box-o3a-and-apoptosis-by-a-standardized-ginsenoside-formulation-kg-135-is-potentiated-by-autophagy-blockade-in-a549-human-lung-cancer-cells
#5
Chih-Jung Yao, Jyh-Ming Chow, Shuang-En Chuang, Chia-Lun Chang, Ming-De Yan, Hsin-Lun Lee, I-Chun Lai, Pei-Chun Lin, Gi-Ming Lai
BACKGROUND: KG-135, a standardized formulation enriched with Rk1, Rg3, and Rg5 ginsenosides, has been shown to inhibit various types of cancer cells; however, the underlying mechanisms are not fully understood. In this study, we explored its effects in A549 human lung cancer cells to investigate the induction of Forkhead Class box O3a (FOXO3a) and autophagy. METHODS: Cell viability was determined by sulforhodamine B staining. Apoptosis and cell cycle distribution were analyzed using flow cytometry...
July 2017: Journal of Ginseng Research
https://www.readbyqxmd.com/read/28699893/hyperactivated-mtorc1-downregulation-of-foxo3a-pdgfr%C3%AE-akt-cascade-restrains-tuberous-sclerosis-complex-associated-tumor-development
#6
Li Wang, Zhaofei Ni, Yujie Liu, Shuang Ji, Fuquan Jin, Keguo Jiang, Junfang Ma, Cuiping Ren, Hongbing Zhang, Zhongdong Hu, Xiaojun Zha
Hyperactivation of mammalian target of rapamycin complex 1 (mTORC1), caused by loss-of-function mutations in either the TSC1 or TSC2 gene, leads to the development of tuberous sclerosis complex (TSC), a benign tumor syndrome with multiple affected organs. mTORC1-mediated inhibition of AKT constrains the tumor progression of TSC, but the exact mechanisms remain unclear. Herein we showed that loss of TSC1 or TSC2 downregulation of platelet-derived growth factor receptor α (PDGFRα) expression was mediated by mTORC1...
July 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28689811/ampk-activation-ameliorates-d-galn-lps-induced-acute-liver-failure-by-upregulating-foxo3a-to-induce-autophagy
#7
Yan-Min Liu, Jun Lv, Qing-Lei Zeng, Shen Shen, Ji-Yuan Xing, Ying-Ying Zhang, Zhi-Hao Zhang, Zu-Jiang Yu
BACKGROUND AND AIM: Acute liver failure (ALF) is an uncommon but serious disease still carrying a high mortality. This study aimed to investigate the mechanism of AMPK on D-GalN/LPS-induced ALF. METHODS: In this study, we utilized intraperitoneal injection of D-GalN/LPS to induce ALF model, and analyzed the expression of AMPK, inflammatory cytokines (TNF-α, IL-1β and IL-6), Foxo3A and autophagy-related genes (Atg-5, Beclin-1, Atg-7) by real-time quantitative polymerase chain reaction (RT-PCR) in liver tissue...
July 6, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28688900/mir-34a-sirtuin-1-foxo3a-is-involved-in-genistein-protecting-against-ox-ldl-induced-oxidative-damage-in-huvecs
#8
Huaping Zhang, Zhenxiang Zhao, Xuefen Pang, Jian Yang, Haixia Yu, Yinhong Zhang, Hui Zhou, Jiahui Zhao
The antioxidant activity of genistein is associated with preventing atherosclerosis; however, the underlying mechanisms are not fully understood. In this study, human umbilical vein endothelial cells (HUVECs) were pretreated with genistein at different concentrations (10nM, 100nM and 1000nM) for 6h and then exposed to ox-LDL (50mg/L) for another 24h. Results showed that genistein restrained reactive oxygen species (ROS) and malondialdehyde (MDA) production, and ameliorated the inhibitory effect on superoxide dismutase (SOD), catalase (CAT), glutathione (GSH) and glutathione peroxidase (GPx) activity elicited by ox-LDL stimulation...
July 5, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28683591/the-ketone-metabolite-%C3%AE-hydroxybutyrate-attenuates-oxidative-stress-in-spinal-cord-injury-by-suppression-of-class-i-histone-deacetylases
#9
Qingan Zhu, Ganggang Kong, Zucheng Huang, Wei Ji, Xiaomeng Wang, Junhao Liu, Xiuhua Wu, Zhiping Huang, Rong Li
The ketone metabolite, β-hydroxybutyrate (βOHB), is reported neuroprotective after spinal cord injury (SCI) in rats, but the underlying mechanism remains unknown. The present study aims to investigate effects of βOHB on suppression of oxidative stress and inhibition of class I histone deacetylases (HDACs) in in-vivo and in-vitro models. Rats were fed with ketogenic diet (KD) or standard diet (SD) 3 weeks. A C5 hemi-contusion injury was applied to these animals on the 14th day of experiment, and spinal cord samples were harvested on the 1st, 3rd and 7th day after SCI, respectively...
July 6, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28678055/resveratrol-ameliorates-cardiac-dysfunction-by-inhibiting-apoptosis-via-the-pi3k-akt-foxo3a-pathway-in-a-rat-model-of-diabetic-cardiomyopathy
#10
Zhiye Wu, Anqing Huang, Jianyun Yan, Bei Liu, Qicai Liu, Jianwu Zhang, Xiuli Zhang, Caiwen Ou, Minsheng Chen
The aim of this study is to explore the effect and mechanism of action of resveratrol (RSV) on cardiac function in diabetic cardiomyopathy. Hyperglycemia-induced apoptosis contributes to the pathogenic changes in diabetic cardiomyopathy (DCM). RSV treatment inhibited high glucose-induced apoptosis of neonatal rat ventricular myocytes. Additionally, high glucose decreased cell viability, prevented Akt and FoxO3a phosphorylation, and suppressed cytoplasmic translocation of FoxO3a.While, these effects of apoptosis were reversed by 10μM of RSV...
May 17, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28660881/ten-eleven-translocation-2-interacts-with-forkhead-box-o3-and-regulates-adult-neurogenesis
#11
Xuekun Li, Bing Yao, Li Chen, Yunhee Kang, Yujing Li, Ying Cheng, Liping Li, Li Lin, Zhiqin Wang, Mengli Wang, Feng Pan, Qing Dai, Wei Zhang, Hao Wu, Qiang Shu, Zhaohui Qin, Chuan He, Mingjiang Xu, Peng Jin
Emerging evidence suggests that active DNA demethylation machinery plays important epigenetic roles in mammalian adult neurogenesis; however, the precise molecular mechanisms and critical functional players of DNA demethylation in this process remain largely unexplored. Ten-eleven translocation (Tet) proteins convert 5-methylcytosine (5mC) to 5-hydroxymethylcytosine (5hmC) and its downstream derivatives. Here we show that 5hmC is elevated during the differentiation of adult neural stem cells (aNSCs), and Tet2 is primarily responsible for modulating 5hmC dynamics...
June 29, 2017: Nature Communications
https://www.readbyqxmd.com/read/28658519/synergistic-effect-of-melatonin-and-ghrelin-in-preventing-cisplatin-induced-ovarian-damage-via-regulation-of-foxo3a-phosphorylation-and-binding-to-the-p27-kip1-promoter-in-primordial-follicles
#12
Hoon Jang, Younghwa Na, Kwonho Hong, Sangho Lee, Sohyeon Moon, Minha Cho, Miseon Park, Ok-Hee Lee, Eun Mi Chang, Dong Ryul Lee, Jung Jae Ko, Woo Sik Lee, Youngsok Choi
Premature ovarian failure during chemotherapy is a serious problem for young women with cancer. To preserve the fertility of these patients, approaches to prevent chemotherapy-induced ovarian failure are needed. In a previous study, we reported that melatonin treatment prevents the depletion of the dormant follicle pool via repression of the simultaneous activation of dormant primordial follicles by cisplatin. However, melatonin's protective effect was only partial and thus insufficient. In this study, we found that the hormone ghrelin enhances the protective effect of melatonin against cisplatin-induced ovarian failure in mouse model...
June 28, 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28656276/lentivirus%C3%A2-mediated-rig%C3%A2-i-knockdown-relieves-cell-proliferation-inhibition-cell-cycle-arrest-and-apoptosis-in-atra%C3%A2-induced-nb4-cells-via-the-akt%C3%A2-foxo3a-signaling-pathway-in-vitro
#13
Lei Chen, Ya-Bin Cui, Yu-Ling Si, Wei-Dong Su, Xin-Chao Wang, Hua Pang, Li-Jun Qiu
Retinoic acid inducible gene I (RIG‑I) is upregulated during all‑trans retinoic acid (ATRA)‑induced terminal granulocytic differentiation of NB4 acute promyelocytic leukemia (APL) cells. However, the function and mechanism of RIG‑I in NB4 cells remains to be fully elucidated. In the present study, lentivirus‑mediated RIG‑I‑knockdown was used to investigate the proliferation, cell cycle and apoptotic processes of ATRA‑induced NB4 cells in vitro using an MTT assay and flow cytometry, respectively...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28656245/synergistic-cytotoxic-effects-of-arsenite-and-tetrandrine-in-human-breast-cancer-cell-line-mcf-7
#14
Mingjiang Yao, Bo Yuan, Xiao Wang, Ai Sato, Kana Sakuma, Kurumi Kaneko, Hana Komuro, Ayane Okazaki, Hideki Hayashi, Hiroo Toyoda, Xiaohua Pei, Xiaomei Hu, Toshihiko Hirano, Norio Takagi
To provide novel insight into the development of new therapeutic strategies to combat breast cancer using trivalent arsenic (AsIII)-based combination therapy, the cytotoxicity of a combination of AsIII and tetrandrine (Tetra), a Chinese plant-derived alkaloid, was investigated in the human breast cancer cell line MCF-7. Cytotoxicity was evaluated using cell viability, colony formation, wound healing, lactate dehydrogenase leakage and cell cycle assay. Alterations of genes associated with cell proliferation and death were analyzed using real-time PCR and western blotting...
June 23, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28655554/t-type-ca-2-channels-elicit-pro-proliferative-and-anti-apoptotic-responses-through-impaired-pp2a-akt1-signaling-in-pasmcs-from-patients-with-pulmonary-arterial-hypertension
#15
Safietou Sankhe, Sevasti Manousakidi, Fabrice Antigny, Jennifer Arthur Ataam, Sana Bentebbal, Yann Ruchon, Florence Lecerf, Jessica Sabourin, Laura Price, Elie Fadel, Peter Dorfmüller, Saadia Eddahibi, Marc Humbert, Frédéric Perros, Véronique Capuano
Idiopathic pulmonary arterial hypertension (iPAH) is characterized by obstructive hyperproliferation and apoptosis resistance of distal pulmonary artery smooth muscle cells (PASMCs). T-type Ca(2+) channel blockers have been shown to reduce experimental pulmonary hypertension, although the impact of T-type channel inhibition remains unexplored in PASMCs from iPAH patients. Here we show that T-type channels Cav3.1 and Cav3.2 are present in the lung and PASMCs from iPAH patients and control subjects. The blockade of T-type channels by the specific blocker, TTA-A2, prevents cell cycle progression and PASMCs growth...
June 24, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28652419/resveratrol-attenuates-nicotine-mediated-oxidative-injury-by-inducing-manganese-superoxide-dismutase-in-renal-proximal-tubule-cells
#16
Samuel Hall, Mehul Dixit, Istvan Arany
BACKGROUND/AIM: Nicotine (NIC) exposure - via smoking and the increasingly popular E-cigarettes- increases oxidative stress and hence, renal risk in smokers. Resveratrol (RES) may help ameliorate this risk by mounting anti-oxidant responses in the kidney. MATERIALS AND METHODS: Renal proximal tubule cells (NRK52E) were treated with vehicle or 20 μM RES prior to treatment with 200 μM NIC and generation of reactive oxygen species (ROS) as well as cell viability was determined...
July 2017: In Vivo
https://www.readbyqxmd.com/read/28650731/combination-treatments-with-luteolin-and-fisetin-enhance-anti-inflammatory-effects-in-high-glucose-treated-thp-1-cells-through-histone-acetyltransferase-histone-deacetylase-regulation
#17
Arang Kim, Jung-Mi Yun
Hyperglycemia leads to diabetes and its diabetic complications. In this study, we investigated the synergistic effects of luteolin and fisetin on proinflammatory cytokine secretion and its underlying epigenetic regulation in human monocytes exposed to hyperglycemic (HG) concentrations. Human monocytic cells (THP-1) were cultured under controlled (14.5 mM mannitol), normoglycemic (5.5 mM glucose), or HG (20 mM glucose) conditions in the absence or presence of the two phytochemicals for 48 h. Whereas HG conditions significantly induced histone acetylation, nuclear factor-kappa B (NF-κB) activation, interleukin 6, and tumor necrosis factor-α release from THP-1 cells; combination treatments with the two phytochemicals (500 nM fisetin, and l μM and 500 nM luteolin) suppressed NF-κB activity and inflammatory cytokine release...
June 26, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28630576/no-effect-of-a-whey-growth-factor-extract-during-resistance-training-on-strength-body-composition-or-hypertrophic-gene-expression-in-resistance-trained-young-men
#18
Michael J Dale, Alison M Coates, Peter R C Howe, Grant R Tomkinson, Matthew T Haren, Andrew Brown, Marissa Caldow, David Cameron-Smith, Jonathan D Buckley
Growth factors can be isolated from bovine milk to form a whey growth factor extract (WGFE). This study examined whether WGFE promoted activation of the AKT/mTOR pathway enabling increased lean tissue mass and strength in resistance trained men. Forty six men with >6 months of resistance training (RT) experience performed 12 weeks of RT. Participants consumed 20 g/day of whey protein and were randomised to receive either 1.6 g WGFE/day (WGFE; n = 22) or 1.6 g cellulose/day (control, CONT; n = 24). The primary outcome was leg press one-repetition maximum (LP1-RM) which was assessed at baseline, 6 and 12 weeks...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28627607/inactivation-of-akt-erk-and-nf-%C3%AE%C2%BAb-by-genistein-derivative-7-difluoromethoxyl-5-4-di-n-octylygenistein-reduces-ovarian-carcinoma-oncogenicity
#19
Yingxia Ning, Meng Xu, Xiaocheng Cao, Xiangding Chen, Xin Luo
Cancer stem cells (CSCs) have central functions in cancer formation and development. Aberrant expression of AKT, ERK and NF-κB signaling pathways have been reported in several types of CSCs. Phytochemicals from dietary compounds possess anti-CSC properties, and have been characterized as promising therapeutic agents for the prevention and treatment of many types of cancers. We previously showed that the newly synthesized genistein derivative, 7-difluoromethoxyl-5,4'-di-n-octylygenistein (DFOG), can inhibit the self-renewal ability of ovarian cancer stem cells (OVCSLCs)...
June 9, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28598238/nlrc3-regulates-cellular-proliferation-and-apoptosis-to-attenuate-the-development-of-colorectal-cancer
#20
Rajendra Karki, R K Subbarao Malireddi, Qifan Zhu, Thirumala-Devi Kanneganti
Nucleotide-binding domain, leucine-rich-repeat-containing proteins (NLRs) are intracellular innate immune sensors of pathogen-associated and damage-associated molecular patterns. NLRs regulate diverse biologic processes such as inflammatory responses, cell proliferation and death, and gut microbiota to attenuate tumorigenesis. In a recent publication in Nature, we identified NLRC3 as a negative regulator of PI3K-mTOR signaling and characterized its potential tumor suppressor function. Enterocytes lacking NLRC3 cannot control cellular proliferation because they are unable to suppress activation of PI3K-mTOR signaling pathways...
July 3, 2017: Cell Cycle
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