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https://www.readbyqxmd.com/read/29169220/fermented-soymilk-alleviates-lipid-accumulation-by-inhibition-of-srebp-1-and-activation-of-nrf-2-in-the-hepatocellular-steatosis-model
#1
Sang Bong Ahn, Wen Hao Wu, Jong Hun Lee, Dae Won Jun, Jihyun Kim, Riji Kim, Tae-Bok Lee, Jin Hyun Jun
Ingredients of soy and fermented soy products have been widely utilized as food supplements for health-enhancing properties. The aim was to evaluate the effects of fermented soymilk (FSM) and soymilk (SM) on the free fatty acid-induced lipogenesis in the hepatocellular steatosis model. HepG2 cells were incubated with palmitic acid (PA) for 24 h to induce lipogenesis and accumulation of intracellular lipid contents. The PA treated cells were co-incubated with FSM, SM, genistein, and estrogen, respectively. Lipid accumulations in the PA-treated HpG2 cells were significantly decreased by co-incubation with FSM...
November 25, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29159775/toxic-effects-of-phytol-and-retinol-on-human-glioblastoma-cells-are-associated-with-modulation-of-cholesterol-and-fatty-acid-biosynthetic-pathways
#2
Gustavo Facchini, Raffaela Silvestre Ignarro, Erika Rodrigues-Silva, André Schwambach Vieira, Iscia Lopes-Cendes, Roger Frigério Castilho, Fabio Rogerio
Glioblastoma (GBM) is the most common primary brain tumor. Genetic mutations may reprogram the metabolism of neoplastic cells. Particularly, alterations in cholesterol and fatty acid biosynthetic pathways may favor biomass synthesis and resistance to therapy. Therefore, compounds that interfere with those pathways, such as phytol (PHY) and retinol (RET), may be appropriate for cytotoxic approaches. We tested the effect of PHY or RET on the viability of human GBM cell lines (U87MG, A172 and T98G). Since the compounds showed a dose-dependent cytotoxic effect, additional analyses were performed with IC50 values...
November 20, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29158052/baicalin-attenuates-non-alcoholic-steatohepatitis-by-suppressing-key-regulators-of-lipid-metabolism-inflammation-and-fibrosis-in-mice
#3
Junli Zhang, Haiming Zhang, Xiaoling Deng, Ning Zhang, Beibei Liu, Shengliang Xin, Guixin Li, Keshu Xu
AIMS: Baicalin (BA), an active flavonoid compound originating from the herb of Scutellaria baicalensis Georgi, has been previously shown to exert anti-inflammation and anti-oxidant effects in liver diseases. However, the potential role of BA in the regulation of non-alcoholic steatohepatitis (NASH) remains elusive. In this study, we newly explored the hepatoprotective effects of BA in MCD diet-induced NASH by ameliorating hepatic steatosis, inflammation, fibrosis and apoptosis. MAIN METHODS: NASH was induced in mice fed a methionine and choline-deficient (MCD) diet for 4weeks...
November 17, 2017: Life Sciences
https://www.readbyqxmd.com/read/29156529/alpinetin-improved-high-fat-diet-induced-non-alcoholic-fatty-liver-disease-nafld-through-improving-oxidative-stress-inflammatory-response-and-lipid-metabolism
#4
Yong Zhou, Yin-Lu Ding, Jian-Liang Zhang, Peng Zhang, Jin-Qing Wang, Zhao-Hua Li
The non-alcoholic fatty liver disease (NAFLD) has become a serious medical problem and an increasing threat to public health. It is characterized by the abnormal fat accumulation in liver without excessive alcohol intake. The concurrent NAFLD might up-regulate the risk of chronic kidney disease as well as the mortality rate. Though various drugs have been investigated to attenuate NAFLD, further study is still necessary to find new therapeutic strategy and to reveal the underlying molecular mechanism. In the present study, NAFLD animal models were induced by feeding with high fat (HF) diet for 8 weeks...
November 15, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29155266/chronic-dexamethasone-exposure-markedly-decreased-the-hepatic-triglyceride-accumulation-in-growing-goats
#5
Qu Chen, Liqiong Niu, Canfeng Hua, Yali Geng, Liuping Cai, Shiyu Tao, Yingdong Ni, Ruqian Zhao
Chronic stress seriously threatens welfare and health in animals and humans. Consecutive dexamethasone (Dex) injection was used to mimic chronic stress previously. In order to investigate the effect of chronic stress on hepatic lipids metabolism, in this study, 10 healthy male goats were randomly allocated into two groups, one received a consecutive injection of Dex via intramuscularly for 3 weeks (Dex group), the other received the same volume of saline as the control group (Con group). Hepatic health and triglyceride (TG) metabolism were analyzed and compared between two groups...
November 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29152152/association-of-genetic-variations-in-the-lipid-regulatory-pathway-genes-fbxw7-and-srebps-with-coronary-artery-disease-among-han-chinese-and-uygur-chinese-populations-in-xinjiang-china
#6
Asiya Abudesimu, Dilare Adi, Dilixiati Siti, Xiang Xie, Yi-Ning Yang, Xiao-Mei Li, Ying-Hong Wang, Yong-Tao Wang, Ya-Jie Meng, Fen Liu, Bang-Dang Chen, Xiang Ma, Zhen-Yan Fu, Yi-Tong Ma
Background: Hyperlipidemia is a major risk factor for coronary artery disease (CAD). The current study was designed to explore the possible correlation between single nucleotide polymorphisms (SNPs) in the lipid homeostasis regulatory genes F-box and WD repeat domain-containing 7 (FBXW7) and sterol regulatory element-binding proteins (SREBPs) with CAD among Han Chinese and Uygur Chinese populations in Xinjiang, China. Results: In the Uygur Chinese population, rs9902941 in SREBP-1 and rs10033601 in FBXW7 were found to be associated with CAD in a recessive model (TT vs...
October 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/29148037/growth-performance-fatty-acid-composition-lipid-deposition-and-hepatic-lipid-metabolism-related-gene-expression-in-juvenile-pond-loach-misgurnus-anguillicaudatus-fed-diets-with-different-dietary-soybean-oil-levels
#7
Y Li, Z Jia, X Liang, D Matulic, M Hussein, J Gao
A 10 week feeding trial was conducted to evaluate the effects of different dietary soybean oil (SO) levels on growth performance, fatty-acid composition and lipid deposition in viscera, histology and histochemistry of liver, intestine and hepatic-lipid metabolism-related gene expressions in pond loach Misgurnus anguillicaudatus juveniles. Misgurnus anguillicaudatus (mean ± s.d. mass 0·40 ± 0·01 g) were fed five experimental diets containing SO at different concentrations: 0, 20, 32, 56 and 100% SO and a diet containing 100% fish oil (100% FO)...
November 17, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/29147905/transcriptional-regulation-of-dj-1
#8
Kazuko Takahashi-Niki, Takeshi Niki, Sanae M M Iguchi-Ariga, Hiroyoshi Ariga
DJ-1 is an oncogene and also a causative gene for familial Parkinson's disease. DJ-1 has various functions, and the oxidative status of a cysteine residue at position 106 (C106) is crucial for determination of the activation level of DJ-1.DJ-1 binds to many proteins, including various transcription factors, and acts as a coactivator or corepressor for regulating their target genes without direct binding to DNA, thereby affecting various cell functions. DJ-1-regulating transcription factors and their modified proteins are the androgen receptor and its regulatory proteins, p53; polypyrimidine tract-binding protein-associated splicing factor (PSF); Keap1, an inhibitor for nuclear factor erythroid2-related factor 2 (Nrf2); sterol regulatory element-binding protein (SREBP); Ras-responsive element-binding protein (RREB1); signal transducer and activator of transcription 1 (STAT1); and Nurr1...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29138263/srebp-1c-as-a-molecular-bridge-between-lipogenesis-and-cell-cycle-progression-of-clear-cell-renal-carcinoma
#9
Gautam Sethi, Muthu K Shanmugam, Alan Prem Kumar
SREBP-1c promotes lipogenesis and tumor growth in various cancers. It is well-known that clear cell renal cell carcinoma (ccRCC), a major subtype of the kidney cancers, exhibits elevated lipid accumulation. However, it has not been fully understood how lipid metabolism might be associated with cell cycle regulation in ccRCC. In recent issue of Molecular and Cellular Biology , Lee et al. demonstrate that SREBP-1c is upregulated in ccRCC by RNF20 downregulation, leading to aberrant lipid storage and PTTG1-dependent cell cycle progression...
November 14, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29137983/transcriptional-regulation-of-acetoacetyl-coa-synthetase-by-sp1-in-neuroblastoma-cells
#10
Shinya Hasegawa, Masahiko Imai, Masahiro Yamasaki, Noriko Takahashi, Tetsuya Fukui
Acetoacetyl-CoA synthetase (AACS) is the enzyme responsible for cholesterol and fatty acid synthesis in the cytosol. We have previously shown that AACS has an important role in normal neuronal development and that knockdown of SREBP-2, which orchestrates cholesterol synthesis, resulted in the downregulation of AACS mRNA levels. In this study, we investigated the transcriptional mechanism of AACS in Neuro-2a, neuroblastoma cells. Luciferase assay showed that the minimal core promoter of the mouse AACS gene is located in a region with 110 bps upstream from the transcription start site...
November 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29133280/mat2a-promotes-porcine-adipogenesis-by-mediating-h3k27me3-at-wnt10b-locus-and-repressing-wnt-%C3%AE-catenin-signaling
#11
Cunzhen Zhao, Haigang Wu, Naren Qimuge, Weijun Pang, Xiao Li, Guiyan Chu, Gongshe Yang
Methionine adenosyltransferase (MAT) is a critical biological enzyme and that can catalyze L-met and ATP to form S-adenosylmethionine (SAM), which is acted as a biological methyl donor in transmethylation reactions involving histone methylation. However, the regulatory effect of methionine adenosyltransferase2A (MAT2A) and its associated methyltransferase activity on adipogenesis is still unclear. In this study, we investigate the effect of MAT2A on adipogenesis and its potential mechanism on histone methylation during porcine preadipocyte differentiation...
November 10, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29132227/oxidative-stress-in-hiv-infection-and-alcohol-use-role-of-redox-signals-in-modulation-of-lipid-rafts-and-abc-transporters
#12
Samikkannu Thangavel, Carmen T Mulet, Venkata S R Atluri, Marisela Agudelo, Rhonda Rosenberg, Jessy G Devieux, Madhavan P N Nair
AIMS: HIV infection induces oxidative stress and alcohol use accelerates disease progression subsequently causing immune dysfunction. However, HIV and alcohol impact on lipid rafts-mediated immune dysfunction remains unknown. In this study, we investigate the modulation by which oxidative stress induces reactive oxygen species (ROS) affecting redox expression, lipid rafts caveiloin-1, ATP-binding cassette (ABC)-transporters, and transcriptional SREBP gene and protein modification and how these mechanisms are associated with arachidonic acid (AA) metabolites in HIV positive alcohol users, and how they escalate immune dysfunction...
November 13, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29130104/expression-of-fatty-acid-synthase-is-regulated-by-pgc%C3%A2-1%C3%AE-and-contributes-to-increased-cell-proliferation
#13
Seong-Hoon Yun, Sung-Won Shin, Joo-In Park
We previously demonstrated that overexpression of peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α) promotes increased cell proliferation and tumorigenic potential through upregulation of specificity protein 1 (Sp1) and acyl-CoA-binding protein (ACBP). Fatty acid synthase (FASN) is a key enzyme in fatty acid biosynthesis, and its expression in various cancers is associated with survival, poor prognosis and cancer recurrence. In the present study, we evaluated whether PGC-1α regulated FASN expression in human colorectal cancer (SNU-C4 and HT-29) cells...
December 2017: Oncology Reports
https://www.readbyqxmd.com/read/29129237/iron-induced-pro-oxidant-and-pro-lipogenic-responses-in-relation-to-impaired-synthesis-and-accretion-of-long-chain-polyunsaturated-fatty-acids-in-rat-hepatic-and-extrahepatic-tissues
#14
Rodrigo Valenzuela, Miguel Ángel Rincón-Cervera, Francisca Echeverría, Cynthia Barrera, Alejandra Espinosa, María Catalina Hernández-Rodas, Macarena Ortiz, Alfonso Valenzuela, Luis A Videla
OBJECTIVES: Iron is involved in processes involving oxygen transfer and utilization. Excess iron is linked to cardiovascular diseases and some types of cancer. Iron overload is associated with oxidative stress development, and may have important interactions with lipid metabolism in the liver favoring the development and progression of non-alcoholic fatty liver disease. The aim of the study described here was to assess the effect of high intake of iron on oxidative stress-related parameters, lipid metabolism, and levels of long-chain polyunsaturated fatty acids (LCPUFAs) in liver and other tissues of the rat...
January 2018: Nutrition
https://www.readbyqxmd.com/read/29126901/omega-3-polyunsaturated-fatty-acids-protect-human-hepatoma-cells-from-developing-steatosis-through-ffa4-gpr120
#15
Saeromi Kang, Jin Huang, Bo-Kyung Lee, Young-Suk Jung, Eunok Im, Jung-Min Koh, Dong-Soon Im
Protective effect of omega-3 polyunsaturated fatty acids (n-3 PUFA) on non-alcoholic fatty liver disease has been demonstrated. FFA4 (also known as GPR120; a G protein-coupled receptor) has been suggested to be a target of n-3 PUFA. FFA4 expression in hepatocytes has also been reported from liver biopsies in child fatty liver patients. In order to assess the functional role of FFA4 in hepatic steatosis, we used an in vitro model of liver X receptor (LXR)-mediated hepatocellular steatosis. FFA4 expression was confirmed in Hep3B and HepG2 human hepatoma cells...
November 7, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29122977/a%C3%AE-inhibits-srebp-2-activation-through-akt-inhibition
#16
Amany Mohamed, Anissa Viveiros, Kathleen Williams, Elena Posse de Chaves
We previously demonstrated that oligomeric Aβ42 (oAβ42 ) inhibits the mevalonate pathway impairing cholesterol synthesis and protein prenylation. Enzymes of the mevalonate pathway are regulated by the transcription factor sterol regulatory element binding protein (SREBP) 2. Here, we show that in several neuronal types challenged with o Aβ42, SREBP-2 activation is reduced. Moreover, SREBP-2 activation is also decreased in brain cortex of the Alzheimer's disease (AD) mouse model TgCRND8, suggesting that SREBP-2 may be affected in vivo during disease...
November 9, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/29122708/combinatory-effects-of-phytoestrogens-and-exercise-on-body-fat-mass-and-lipid-metabolism-in-ovariectomized-female-rats
#17
Wenya Zheng, Jana Rogoschin, Anja Niehoff, Kristina Oden, Sabine E Kulling, Mingyong Xie, Patrick Diel
The purpose of this study was to investigate the combinatory effects of an isoflavone (ISO)-rich diet and exercise on fat mass and lipid metabolism in ovariectomized (OVX) rats. Therefore the female Wistar rats were sedentary, performed an intense treadmill uphill running, received ISOs, or a combination of ISOs and running after ovariectomy. The exercise reduced visceral fat mass, adipocyte size and serum leptin in Sham animals and antagonized the increases of these parameters induced by OVX. ISOs reduced OVX induced increase of serum leptin...
November 6, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29121115/the-response-of-gene-expression-associated-with-lipid-metabolism-fat-deposition-and-fatty-acid-profile-in-the-longissimus-dorsi-muscle-of-gannan-yaks-to-different-energy-levels-of-diets
#18
Chao Yang, Jianbin Liu, Xiaoyun Wu, Pengjia Bao, Ruijun Long, Xian Guo, Xuezhi Ding, Ping Yan
The energy available from the diet, which affects fat deposition in vivo, is a major factor in the expression of genes regulating fat deposition in the longissimus dorsi muscle. Providing high-energy diets to yaks might increase intramuscular fat deposition and fatty acid concentrations under a traditional grazing system in cold seasons. A total of fifteen adult castrated male yaks with an initial body weight 274.3 ± 3.14 kg were analyzed for intramuscular adipose deposition and fatty acid composition. The animals were divided into three groups and fed low-energy (LE: 5...
2017: PloS One
https://www.readbyqxmd.com/read/29113994/hepatocyte-specific-deletion-of-bap31-promotes-srebp1c-activation-promotes-hepatic-lipid-accumulation-and-worsens-insulin-resistance-in-mice
#19
Jia-Lin Xu, Li-Ya Li, Yan-Qing Wang, Ya-Qi Li, Mu Shan, Shi-Zhuo Sun, Yang Yu, Bing Wang
Conditional knockout mice with targeted disruption of BAP31 in adult mouse liver were generated and challenged with a high-fat diet (HFD) for 36 or 96 days, markers of obesity, diabetes, and hepatic steatosis were determined. Mutant mice were indistinguishable from wild-type littermates, but exhibited increased HFD-induced obesity. BAP31-deletion in hepatocytes increased the expression of SREBP1C and the target genes, including ACC1 and SCD1, increased hepatic lipid accumulation and HFD-induced liver steatosis...
November 7, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/29113347/lunasin-functionally-enhances-ldl-uptake-via-inhibiting-pcsk9-and-enhancing-ldlr-expression-in-vitro-and-in-vivo
#20
Lili Gu, Yue Wang, Yaqiong Xu, Qinghua Tian, Gaoxin Lei, Cheng Zhao, Zhan Gao, Qin Pan, Wenfeng Zhao, Liu Nong, Shuhua Tan
Proprotein convertase subtilisin/kexin type 9 (PCSK9) is a serine protease which regulates serum low-density lipoprotein cholesterol (LDL-C) levels by promoting the degradation of the hepatic low-density lipoprotein receptor (LDLR), and has become an attractive therapeutic target for cholesterol lowering intervention. Lunasin, a 43-amino acid polypeptide initially isolated from soybean, has been previously proven to possess cholesterol lowering activity. Here we identified the down-regulation of PCSK9 expression by lunasin as one new mechanism that increased cell-surface LDLR level and enhanced LDL uptake in vitro and in vivo...
October 6, 2017: Oncotarget
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