keyword
MENU ▼
Read by QxMD icon Read
search

s6k1

keyword
https://www.readbyqxmd.com/read/29221131/hoxa5-increases-mitochondrial-apoptosis-by-inhibiting-akt-mtorc1-s6k1-pathway-in-mice-white-adipocytes
#1
Fei Feng, Qian Ren, Song Wu, Muhammad Saeed, Chao Sun
Homeobox A5(Hoxa5), a member of the Hox family, plays a important role in the regulation of proliferation and apoptosis in cancer cells. The dysregulation of the adipocyte apoptosis in vivo leads to obesity and metabolic disorders. However, the effects of Hoxa5 on adipocyte apoptosis are still unknown. In this study, palmitic acid (PA) significantly increased the mRNA level of Hoxa5 and triggered white adipocyte apoptosis in vivo and in vitro. Further analysis revealed that Hoxa5 enhanced the early and late apoptotic cells and fragmentation of genomic DNA in adipocytes from inguinal white adipose tissue (iWAT) of mice...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29182407/metformin-is-associated-with-reduced-cell-proliferation-in-human-endometrial-cancer-by-inbibiting-pi3k-akt-mtor-signaling
#2
Yan Zhao, Hongli Sun, Minjuan Feng, Jinyan Zhao, Xiaogui Zhao, Qiuyuan Wan, Dongge Cai
Metformin recently gained traction as potential anti-endometrial cancer agent for its new applications. However, the underlying mechanisms of the anti-cancer effect of metformin in the endometrial cancer have not yet been fully elucidated. Sixty-five patients diagnosed as endometrial carcinoma were grouped into (n = 33) and non-treatment mixed (n = 32) for analysis. Thirty healthy donors were recruited as controls. We attempt to investigate the effect of metformin on Ki-67, PI3K, p-AKT, p-S6K1, and p-4EBP1 staining in human endometrial cancer by immunohistochemical staining...
November 28, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29153836/post-transcriptional-regulation-of-de-novo-lipogenesis-by-mtorc1-s6k1-srpk2-signaling
#3
Gina Lee, Yuxiang Zheng, Sungyun Cho, Cholsoon Jang, Christina England, Jamie M Dempsey, Yonghao Yu, Xiaolei Liu, Long He, Paola M Cavaliere, Andre Chavez, Erik Zhang, Meltem Isik, Anthony Couvillon, Noah E Dephoure, T Keith Blackwell, Jane J Yu, Joshua D Rabinowitz, Lewis C Cantley, John Blenis
mTORC1 is a signal integrator and master regulator of cellular anabolic processes linked to cell growth and survival. Here, we demonstrate that mTORC1 promotes lipid biogenesis via SRPK2, a key regulator of RNA-binding SR proteins. mTORC1-activated S6K1 phosphorylates SRPK2 at Ser494, which primes Ser497 phosphorylation by CK1. These phosphorylation events promote SRPK2 nuclear translocation and phosphorylation of SR proteins. Genome-wide transcriptome analysis reveals that lipid biosynthetic enzymes are among the downstream targets of mTORC1-SRPK2 signaling...
November 14, 2017: Cell
https://www.readbyqxmd.com/read/29152905/the-gait-translational-control-system
#4
REVIEW
Abul Arif, Peng Yao, Fulvia Terenzi, Jie Jia, Partho Sarothi Ray, Paul L Fox
The interferon (IFN)-γ-activated inhibitor of translation (GAIT) system directs transcript-selective translational control of functionally related genes. In myeloid cells, IFN-γ induces formation of a multiprotein GAIT complex that binds structural GAIT elements in the 3'-untranslated regions (UTRs) of multiple inflammation-related mRNAs, including ceruloplasmin and VEGF-A, and represses their translation. The human GAIT complex is a heterotetramer containing glutamyl-prolyl tRNA synthetase (EPRS), NS1-associated protein 1 (NSAP1), ribosomal protein L13a (L13a), and glyceraldehyde-3-phosphate dehydrogenase (GAPDH)...
November 20, 2017: Wiley Interdisciplinary Reviews. RNA
https://www.readbyqxmd.com/read/29152793/effects-of-dietary-tryptophan-levels-on-performance-and-biochemical-variables-of-plasma-and-intestinal-mucosa-in-yellow-feathered-broiler-breeders
#5
S Q Jiang, Z Y Gou, X J Lin, L Li
The effects of dietary tryptophan (Trp) levels on performance and biochemical variables of plasma and intestinal mucosa in broiler breeder hens were investigated in this study. A total of 780 Lingnan yellow-feathered broiler breeder hens were randomly assigned in one of five dietary treatments with six replicates per treatment (26 birds per replicate). The breeder hens were fed either the basal diet (0.11% Trp) or the basal diet supplemented to 0.15%, 0.19%, 0.23% and 0.27% Trp, from 197 to 259 days of age...
November 19, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/29151270/asct2-defined-by-enzyme-mediated-activation-of-radical-sources-enhances-malignancy-of-gd2-plus-small-cell-lung-cancer
#6
Nobutoshi Esaki, Yuki Ohkawa, Noboru Hashimoto, Yuhsuke Tsuda, Yuhsuke Ohmi, Robiul H Bhuiyan, Norihiro Kotani, Koichi Honke, Atsushi Enomoto, Masahide Takahashi, Keiko Furukawa, Koichi Furukawa
Ganglioside GD2 is specifically expressed in small cell lung cancer (SCLC) cells, leading to enhancement of malignant phenotypes, such as cell proliferation and migration. However, how GD2 promotes malignant phenotypes in SCLC cells is not well known. In this study, to reveal mechanisms by which GD2 increases malignant phenotypes in SCLC cells, we performed enzyme-mediated activation of radical sources combined with mass spectrometry in GD2 positive (+) SCLC cells. Consequently, we identified ASC amino-acid transporter 2 (ASCT2), a major glutamine transporter, which coordinately works with GD2...
November 19, 2017: Cancer Science
https://www.readbyqxmd.com/read/29137239/transcriptome-profiling-in-preadipocytes-identifies-long-noncoding-rnas-as-sam68-targets
#7
Naomi Li, Steven Hébert, Jingwen Song, Claudia L Kleinman, Stéphane Richard
The KH-type RNA binding protein Sam68 is required for adipogenesis. We have previously shown that Sam68-deficient mice have a lean phenotype and are protected against dietary-induced obesity due to defects in mTOR and S6K1 alternative splicing. Herein we profiled the transcriptome of Sam68 wild type and deficient 3T3-L1 mouse preadipocytes. We identified 652 protein-coding genes and 9 ncRNAs that were significantly altered with the loss of Sam68. As expected, downregulated genes were significantly associated with GO terms linked to cell migration, motility, and fat cell differentiation, while upregulated genes were mostly associated with GO terms linked to neurogenesis...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29133261/dual-inhibition-of-brd4-and-pi3k-by-sf2523-suppresses-human-prostate-cancer-cell-growth-in-vitro-and-in-vivo
#8
Gang Shen, Minjun Jiang, Jinxian Pu
Bromodomain-containing protein 4 (BRD4) and phosphatidylinositol 3-kinase (PI3K) are both key oncogenic proteins in human prostate cancer. In the current study, we examined the anti-prostate cancer cell activity by SF2523, a BRD4 and PI3K dual inhibitor. We showed that SF2523 potently inhibited survival and proliferation of the primary human prostate cancer cells. SF2523 induced profound apoptosis activation in prostate cancer cells. The dual inhibitor was yet non-cytotoxic to the prostate epithelial cells...
November 10, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29121435/altered-intracellular-signaling-by-imatinib-increases-the-anti-cancer-effects-of-tyrosine-kinase-inhibitors-in-cml-cells
#9
Takuya Hirao, Masashi Yamaguchi, Megumi Kikuya, Hiroji Chibana, Kousei Ito, Shigeki Aoki
Tyrosine kinase inhibitors (TKIs), including imatinib (IM), improve the outcome of chronic myelogenous leukemia (CML) therapy. However, TKI treatment is long-term and can induce resistance to TKIs, which often leads to a poor clinical outcome in CML patients. Here, we examined the effect of continuous IM exposure on intracellular energy metabolism in K562 cells, a human Philadelphia chromosome-positive CML cell line, and its subsequent sensitivity to anti-cancer agents. Contrary to our expectations, we found that continuous IM exposure increased sensitivity to TKIs...
November 9, 2017: Cancer Science
https://www.readbyqxmd.com/read/29108230/apigenin-enhances-skeletal-muscle-hypertrophy-and-myoblast-differentiation-by-regulating-prmt7
#10
Young Jin Jang, Hyo Jeong Son, Yong Min Choi, Jiyun Ahn, Chang Hwa Jung, Tae Youl Ha
Apigenin, a natural flavone abundant in various plant-derived foods including parsley and celery, has been shown to prevent inflammation and inflammatory diseases. However, the effect of apigenin on skeletal muscle hypertrophy and myogenic differentiation has not previously been elucidated. Here, we investigated the effects of apigenin on quadricep muscle weight and running distance using C57BL/6 mice on an accelerating treadmill. Apigenin stimulated mRNA expression of MHC (myosin heavy chain) 1, MHC2A, and MHC2B in the quadricep muscles of these animals...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29107291/absence-of-the-kinase-s6k1-mimics-the-effect-of-chronic-endurance-exercise-on-glucose-tolerance-and-muscle-oxidative-stress
#11
C Binsch, T Jelenik, A Pfitzer, M Dille, S Müller-Lühlhoff, S Hartwig, S Karpinski, S Lehr, D G Kabra, A Chadt, M Roden, H Al-Hasani, T R Castañeda
OBJECTIVE: Ribosomal protein S6 Kinase-1 (S6K1) has been linked to resistance exercise-mediated improvements in glycemia. We hypothesized that S6K1 may also play a role in regulating glycemic control in response to endurance exercise training. METHODS: S6k1-knockout (S6K1KO) and WT mice on a 60 cal% high-fat diet were trained for 4 weeks on treadmills, metabolically phenotyped, and compared to sedentary controls. RESULTS: WT mice showed improved glucose tolerance after training...
November 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29036762/low-intensity-aerobic-exercise-training-inhibition-of-skeletal-muscle-atrophy-in-high-fat-diet-induced-ovariectomized-rats
#12
Hye Jin Kim, Won Jun Lee
PURPOSE: Postmenopausal women are highly susceptible to diseases, such as obesity, type 2 diabetes, osteoporosis, or skeletal muscle atrophy and many people recognize the need for regular physical activity. Aerobic exercise training is known to improve the oxidative capacity and insulin sensitivity of skeletal muscles. This study aimed to investigate the role of low-intensity aerobic exercise training on skeletal muscle protein degradation or synthesis in the plantaris muscles of high-fat-fed ovariectomized rats...
September 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28986166/sildenafil-induces-browning-of-subcutaneous-white-adipose-tissue-in-overweight-adults
#13
Shuguang Li, Yixiang Li, Lin Xiang, Jing Dong, Min Liu, Guangda Xiang
OBJECTIVE: To investigate that short-term treatment of sildenafil can induce browning of subcutaneous white adipose tissue (sWAT) in human adults. DESIGN: A randomized, double-blinded, placebo-controlled, parallel group trial. METHODS: Sixteen eligibility overweight male subjects were recruited, comparing 100 mg/day sildenafil versus an identical placebo therapy for 7 days. sWAT samples were collected from subjects before and after 7-day sildenafil or placebo intervention...
October 3, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28984034/microcystin-lr-disrupts-insulin-signaling-by-hyperphosphorylating-insulin-receptor-substrate-1-and-glycogen-synthase
#14
Jinghui Liu, Chun Xu, Shaofeng Zhang, Haoyan Li, Kele Chen, Pu Huang, Zonglou Guo, Lihong Xu
Microcystin-LR (MC-LR) is a cyanobacteria-derived heptapeptide that has been commonly characterized as a hepatotoxin. Although the liver is a primary organ in glucose homeostasis, the effect of MC-LR on glucose metabolism remains unclear. In this study, the human liver cell line HL7702 and ICR mice were exposed to various concentrations of MC-LR for 24 h, and the proteins involved in insulin signaling were investigated. The results showed that MC-LR treatment induced the hyperphosphorylation of insulin receptor substrate 1 (IRS1) at several serine sites, S307, S323, S636/639, and S1101 in HL7702 cells, and S302, S318, S632/635, and S1097 in mice livers...
October 6, 2017: Environmental Toxicology
https://www.readbyqxmd.com/read/28983783/mtorc1-signaling-associated-protein-synthesis-in-porcine-mammary-glands-was-regulated-by-the-local-available-methionine-depending-on-methionine-sources
#15
Yalin Zhang, Peng Wang, Sen Lin, Yves Mercier, Huajun Yin, Yumo Song, Xiaoling Zhang, Lianqiang Che, Yan Lin, Shengyu Xu, Bin Feng, De Wu, Zhengfeng Fang
Mechanistic target of rapamycin complex1 (mTORC1) activation and protein synthesis varied with methionine sources; however, the related mechanisms are largely unknown. Porcine mammary epithelial cells (PMEC) and mammary tissue slices (MTS) were used to test whether methionine precursors differ in providing the available methionine and thus differ in mTORC1 signaling-associated protein synthesis. PMEC with methionine deprivation for 8 h and MTS from lactating sows were cultured for 24 and 2 h, respectively, with treatment media without methionine (negative control, NC) or supplemented with 0...
October 5, 2017: Amino Acids
https://www.readbyqxmd.com/read/28972559/inositol-hexaphosphate-inhibits-proliferation-and-induces-apoptosis-of-colon-cancer-cells-by-suppressing-the-akt-mtor-signaling-pathway
#16
Małgorzata Kapral, Joanna Wawszczyk, Katarzyna Jesse, Monika Paul-Samojedny, Dariusz Kuśmierz, Ludmiła Węglarz
Abstract: AKT, a serine/threonine protein kinase and mammalian target of rapamycin (mTOR) plays a critical role in the proliferation and resistance to apoptosis that are essential to the development and progression of colon cancer. Therefore, AKT/mTOR signaling pathway has been recognized as an attractive target for anticancer therapy. Inositol hexaphosphate (InsP6), a natural occurring phytochemical, has been shown to have both preventive and therapeutic effects against various cancers, however, its exact molecular mechanisms of action are not fully understood...
October 3, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28972103/torc1-signaling-exerts-spatial-control-over-microtubule-dynamics-by-promoting-nuclear-export-of-stu2
#17
Babet van der Vaart, Josef Fischböck, Christine Mieck, Peter Pichler, Karl Mechtler, René H Medema, Stefan Westermann
The target of rapamycin complex 1 (TORC1) is a highly conserved multiprotein complex that functions in many cellular processes, including cell growth and cell cycle progression. In this study, we define a novel role for TORC1 as a critical regulator of nuclear microtubule (MT) dynamics in the budding yeast Saccharomyces cerevisiae This activity requires interactions between EB1 and CLIP-170 plus end-tracking protein (+TIP) family members with the TORC1 subunit Kog1/Raptor, which in turn allow the TORC1 proximal kinase Sch9/S6K1 to regulate the MT polymerase Stu2/XMAP215...
November 6, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28971834/differential-localisation-and-anabolic-responsiveness-of-mtor-complexes-in-human-skeletal-muscle-in-response-to-feeding-and-exercise
#18
Nathan Hodson, Chris McGlory, Sara Y Oikawa, Stewart Jeromson, Zhe Song, Markus A Ruegg, D Lee Hamilton, Stuart M Phillips, Andrew Philp
Mechanistic target of rapamycin (mTOR) resides as two complexes within skeletal muscle. mTOR complex 1 (mTORC1-Raptor positive) regulates skeletal muscle growth, whereas mTORC2 (Rictor positive) regulates insulin sensitivity. To examine the regulation of these complexes in human skeletal muscle, we utilised immunohistochemical analysis to study the localisation of mTOR complexes prior to and following protein-carbohydrate feeding (FED) and resistance exercise plus protein-carbohydrate feeding (EXFED) in unilateral exercise model...
September 27, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28962861/tribbles-3-regulates-protein-turnover-in-mouse-skeletal-muscle
#19
Ran Hee Choi, Abigail McConahay, Ha-Won Jeong, Jamie L McClellan, Justin P Hardee, James A Carson, Michael F Hirshman, Laurie J Goodyear, Ho-Jin Koh
Skeletal muscle atrophy is associated with a disruption in protein turnover involving increased protein degradation and suppressed protein synthesis. Although it has been well studied that the IGF-1/PI3K/Akt pathway plays an essential role in the regulation of the protein turnover, molecule(s) that triggers the change in protein turnover still remains to be elucidated. TRB3 has been shown to inhibit Akt through direct binding. In this study, we hypothesized that TRB3 in mouse skeletal muscle negatively regulates protein turnover via the disruption of Akt and its downstream molecules...
November 25, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28953236/post-exercise-muscle-protein-synthesis-in-rats-after-ingestion-of-acidified-bovine-milk-compared-with-skim-milk
#20
Kyosuke Nakayama, Atsushi Kanda, Ryoichi Tagawa, Chiaki Sanbongi, Shuji Ikegami, Hiroyuki Itoh
Bovine milk proteins have a low absorption rate due to gastric acid-induced coagulation. Acidified milk remains liquid under acidic conditions; therefore, the absorption rate of its protein may differ from that of untreated milk. To investigate how this would affect muscle protein synthesis (MPS), we compared MPS after ingestion of acidified versus skim milk in rats. Male Sprague-Dawley rats swam for 2 h and were immediately administered acidified or skim milk, then euthanized at 30, 60, 90, and 120 min afterwards...
September 27, 2017: Nutrients
keyword
keyword
23675
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"