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stearoyl desaturase

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https://www.readbyqxmd.com/read/29675558/dietary-polyunsaturated-fatty-acids-mediate-the-inverse-association-of-stearoyl-coa-desaturase-activity-with-the-risk-of-fatty-liver-in-dyslipidaemic-individuals
#1
Antonio J Amor, Montserrat Cofán, Rocío Mateo-Gallego, Ana Cenarro, Fernando Civeira, Emilio Ortega, Emilio Ros, Aleix Sala-Vila
PURPOSE: The activity of stearoyl-CoA desaturase-1 (SCD1) is increased in non-alcoholic fatty liver disease (NAFLD). Polyunsaturated fatty acids (PUFA) inhibit SCD1, but clinical studies on whether all dietary PUFA species are equal in SCD1 inhibition are scarce. Serum phospholipids are an objective proxy of dietary intake of plant-derived PUFA (C18:2n-6, C18:3n-3) and marine-derived PUFA (C20:5n-3, C22:6n-3). In 355 participants with primary dyslipidemia, we cross-sectionally investigated whether the presumed association between surrogate markers of NAFLD and SCD1 activity is mediated by intake of PUFA, and, if it is, what PUFA species are relevant in this regard...
April 19, 2018: European Journal of Nutrition
https://www.readbyqxmd.com/read/29672525/comparative-genomic-and-transcriptomic-analysis-of-selected-fatty-acid-biosynthesis-genes-and-cnl-disease-resistance-genes-in-oil-palm
#2
Rozana Rosli, Nadzirah Amiruddin, Mohd Amin Ab Halim, Pek-Lan Chan, Kuang-Lim Chan, Norazah Azizi, Priscilla E Morris, Eng-Ti Leslie Low, Meilina Ong-Abdullah, Ravigadevi Sambanthamurthi, Rajinder Singh, Denis J Murphy
Comparative genomics and transcriptomic analyses were performed on two agronomically important groups of genes from oil palm versus other major crop species and the model organism, Arabidopsis thaliana. The first analysis was of two gene families with key roles in regulation of oil quality and in particular the accumulation of oleic acid, namely stearoyl ACP desaturases (SAD) and acyl-acyl carrier protein (ACP) thioesterases (FAT). In both cases, these were found to be large gene families with complex expression profiles across a wide range of tissue types and developmental stages...
2018: PloS One
https://www.readbyqxmd.com/read/29671937/quercetin-improves-postpartum-hypogalactia-in-milk-deficient-mice-via-stimulating-prolactin-production-in-pituitary-gland
#3
Man Lin, Na Wang, Bei Yao, Yao Zhong, Yan Lin, Tianhui You
Postpartum dysgalactia is a common clinical problem for lactating women. Seeking out the safe and efficient phytoestrogens will be a promising strategy for postpartum dysgalactia therapy. In this study, the postpartum mice within four groups, including control group, the model group, and the treatment groups intragastrically administrated with normal saline, bromocriptine, bromocriptine plus 17α-ethinyl estradiol, and bromocriptine plus quercetin, respectively, were used. The results showed that quercetin, a kind of natural phytoestrogen, could efficiently promote lactation yield and mammary gland development in the agalactosis mice produced by bromocriptine administration...
April 19, 2018: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29670594/cellular-and-molecular-responses-of-dunaliella-tertiolecta-by-expression-of-a-plant-medium-chain-length-fatty-acid-specific-acyl-acp-thioesterase
#4
Huixin Lin, Hui Shen, Yuan K Lee
Metabolic engineering of microalgae to accumulate high levels of medium chain length fatty acids (MCFAs) has met with limited success. Traditional approaches employ single introduction of MCFA specific acyl-ACP thioesterases (TEs), but our current research in transgenic Dunaliella tertiolecta line has highlighted that, there is no single rate-limiting approach that can effectively increase MCFA levels. Here, we explore the accumulation of MCFAs in D. tertiolecta after transgenic expression of myristic acid biased TE (C14TE)...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29670063/identification-of-the-candidate-proteins-related-to-oleic-acid-accumulation-during-peanut-arachis-hypogaea-l-seed-development-through-comparative-proteome-analysis
#5
Hao Liu, Haifen Li, Jianzhong Gu, Li Deng, Li Ren, Yanbin Hong, Qing Lu, Xiaoping Chen, Xuanqiang Liang
Peanuts ( Arachis hypogaea L.) are an important oilseed crop, containing high contents of protein and fatty acids (FA). The major components of FA found in peanut oil are unsaturated FAs, including oleic acid (OA, C18:1) and linoleic acid (LOA, C18:2). Moreover, the high content of OA in peanut oil is beneficial for human health and long-term storage due to its antioxidant activity. However, the dynamic changes in proteomics related to OA accumulation during seed development still remain largely unexplored...
April 18, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29663407/ground-beef-high-in-total-fat-and-saturated-fatty-acids-decreases-x-receptor-signaling-targets-in-peripheral-blood-mononuclear-cells-of-men-and-women
#6
Seong H Choi, Ghazal Gharahmany, Rosemary L Walzem, Thomas H Meade, Stephen B Smith
We hypothesized that consumption of saturated fatty acids in the form of high-fat ground beef for 5 weeks would depress liver X receptor signaling targets in peripheral blood mononuclear cells (PBMC) and that changes in gene expression would be associated with the corresponding changes in lipoprotein cholesterol (C) concentrations. Older men (n = 5, age 68.0 ± 4.6 years) and postmenopausal women (n = 7, age 60.9 ± 3.1 years) were assigned randomly to consume ground-beef containing 18% total fat (18F) or 25% total fat (25F), five patties per week for 5 weeks with an intervening 4-week washout period...
April 16, 2018: Lipids
https://www.readbyqxmd.com/read/29618664/macrophage-microrna-150-promotes-pathological-angiogenesis-as-seen-in-age-related-macular-degeneration
#7
Jonathan B Lin, Harsh V Moolani, Abdoulaye Sene, Rohini Sidhu, Pamela Kell, Joseph B Lin, Zhenyu Dong, Norimitsu Ban, Daniel S Ory, Rajendra S Apte
Macrophage aging is pathogenic in diseases of the elderly, including age-related macular degeneration (AMD), a leading cause of blindness in older adults. However, the role of microRNAs, which modulate immune processes, in regulating macrophage dysfunction and thereby promoting age-associated diseases is underexplored. Here, we report that microRNA-150 (miR-150) coordinates transcriptomic changes in aged murine macrophages, especially those associated with aberrant lipid trafficking and metabolism in AMD pathogenesis...
April 5, 2018: JCI Insight
https://www.readbyqxmd.com/read/29615666/insensitivity-to-atorvastatin-is-associated-with-increased-accumulation-of-intracellular-lipid-droplets-and-fatty-acid-metabolism-in-breast-cancer-cells
#8
Barbara Lettiero, Maria Inasu, Siker Kimbung, Signe Borgquist
Apart from the relevant lipid-lowering effects, statins have demonstrated significant, although heterogeneous, anti-tumor activities in preventing breast cancer (BC) progression. To characterize the critical pathways behind the diverse responses to therapy, we investigated statin-induced changes in regulation of lipid metabolism and abundance of neutral lipid-containing cytoplasmic lipid droplets (LDs) in BC cells displaying different sensitivity to atorvastatin. Following atorvastatin treatment, accumulated LD levels inversely mirrored the marginal anti-proliferative effects in a dose and time-dependent manner in the less-sensitive BC cells...
April 3, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29605251/protein-engineering-regulatory-perspectives-of-stearoyl-coa-desaturase
#9
REVIEW
Shagufta Kamal, Ayesha Saleem, Saima Rehman, Ismat Bibi, Hafiz M N Iqbal
Stearoyl Co A desaturase (SCD) is a rate-limiting lipogenic enzyme that plays an integral role in catalyzing the synthesis of monounsaturated fatty acids, chiefly oleate and palmitoleate. Both contribute a major part of the biological membrane. Numerous SCD isoforms exist in mouse and humans, i.e., SCD-1 to SCD-4 and SCD-1 and SCD-5, respectively. From the biological viewpoint, hyperexpression of SCD1 cause many metabolic disorders including obesity, insulin resistance, hypertension, and hypertriglyceridemia, etc...
March 29, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29595454/-knockdown-of-dopamine-receptor-d2-upregulates-the-expression-of-adiogenic-genes-in-mouse-primary-mesencephalic-neurons
#10
Jiaqi Ding, Xiaoli Chen, Jiaji Lin, Junling Zhu, Zhuyi Li
Objective To study the effects of dopamine receptor D2 (DRD2) on the adipogenesis genes in mouse primary mesencephalic neurons. Methods The lentiviral vectors which expressed specific shRNA targeting DRD2 were constructed to decrease DRD2 expression in mouse primary mesencephalic neurons. High throughput sequencing (HTS) analysis was used to investigate gene expression changes between the DRD2 knock-down group and the negative control group. Real-time quantitative PCR (qRT-PCR) and Western blot analysis were applied to verify the differently expressed genes...
January 2018: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/29580300/association-study-highlights-the-influence-of-elovl-fatty-acid-elongase-6-gene-region-on-backfat-fatty-acid-composition-in-large-white-pig-breed
#11
M Zappaterra, R Ros-Freixedes, J Estany, R Davoli
Dietary fatty acid (FA) composition has an impact on human health. There is an increasing request from consumers for healthier food and pork industry must respond to it without worsening performance and the technological properties of pork products. The inclusion of genetic markers for carcass FA composition in pig selection schemes could be a useful tool to reach the right balance between unsaturated and saturated FAs to satisfy market demands. With the aim of finding genomic regions associated with porcine backfat FA composition, a genome-wide association study was performed on 798 Italian Large White pigs genotyped using Illumina PorcineSNP60 k...
March 27, 2018: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29567472/soat1-deficiency-attenuates-atherosclerosis-by-regulating-inflammation-and-cholesterol-transportation-via-ho-1-pathway
#12
Nan Wu, Rong-Qing Li, Li Li
Sterol O-acyltransferase 1 (SOAT1) is a key enzyme for cholesteryl ester biosynthesis. The objective of the present study is to investigate the role and underlying molecular mechanisms of SOAT1 in atherosclerosis. Our results indicated that SOAT1 was highly expressed in endothelial cells of atherosclerotic lesions in human patients with atherosclerosis and in apolipoprotein E deficient (ApoE-/- ) mice fed with high fat diet (HFD). We established a model of atherosclerosis using ApoE and SOAT1 gene double knockout (ApoE-/- SOAT1-/- ) mice...
March 19, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29559985/seed-specific-expression-of-atlec1-increased-oil-content-and-altered-fatty-acid-composition-in-seeds-of-peanut-arachis-hypogaea-l
#13
Guiying Tang, Pingli Xu, Wenhua Ma, Fang Wang, Zhanji Liu, Shubo Wan, Lei Shan
Peanut ( Arachis hypogaea L.) is one of the major oil crops and is the fifth largest source of plant oils in the world. Numerous genes participate in regulating the biosynthesis and accumulation of the storage lipids in seeds or other reservoir organs, among which several transcription factors, such as LEAFY COTYLEDON1 ( AtLEC1 ), LEC2 , and WRINKLED1 ( WRI1 ), involved in embryo development also control the lipid reservoir in seeds. In this study, the AtLEC1 gene was transferred into the peanut genome and expressed in a seed-specific manner driven by the NapinA full-length promoter or its truncated 230-bp promoter...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29552293/targeting-stearoyl-coa-desaturase-1-to-repress-endometrial-cancer-progression
#14
Weihua Li, Huimin Bai, Shiping Liu, Dongyan Cao, Hongying Wu, Keng Shen, Yanhong Tai, Jiaxin Yang
Stearoyl-CoA desaturase 1 (SCD1) is an established molecular target in many primary tumors including breast, lung, pancreatic, colon and hepatocellular carcinomas. However, its potential role in supporting endometrial cancer growth and progression has not yet been determined. In this study, we evaluated the value of SCD1 as a candidate therapeutic target in human endometrial cancer. Compared with secretory and post-menopausal endometrium, SCD1 was highly expressed in normal endometrium of proliferative phase, endometrial hyperplasia and endometrial carcinoma, while was absent or low expression in non-malignant control stromal cells and adjacent normal endometrium...
February 23, 2018: Oncotarget
https://www.readbyqxmd.com/read/29542003/scutellaria-baicalensis-regulates-ffa-metabolism-to-ameliorate-nafld-through-the-ampk-mediated-srebp-signaling-pathway
#15
Qian Chen, Mengyang Liu, Haiyang Yu, Jian Li, Sijian Wang, Yi Zhang, Feng Qiu, Tao Wang
Scutellaria baicalensis has been reported to improve the lipid metabolism of high-fat diet-induced liver dysfunction, but direct evidence is rare. This study aimed to explore the effects and mechanisms of S. baicalensis and its major constituent baicalin on hepatic lipotoxicity. KK-Ay mice and orotic acid (OA)-induced nonalcoholic fatty liver disease (NAFLD) rats were used to evaluate lipid metabolism regulatory effects. Sodium oleate-induced triglyceride-accumulated HepG2 cells were used for the mechanism study, pretreated with or without compound C or STO-609 or transfected with liver kinase B1 (LKB1) siRNA...
March 14, 2018: Journal of Natural Medicines
https://www.readbyqxmd.com/read/29530061/stearoyl-coa-desaturase-1-promotes-colorectal-cancer-metastasis-in-response-to-glucose-by-suppressing-pten
#16
Hui Ran, Yemin Zhu, Ruyuan Deng, Qi Zhang, Xisheng Liu, Ming Feng, Jie Zhong, Shuhai Lin, Xuemei Tong, Qing Su
BACKGROUND: Diabetic patients have a higher risk factor for colorectal cancer (CRC) metastasis. Stearoyl-CoA desaturase 1 (SCD1), the main enzyme responsible for producing monounsaturated fatty acids(MUFA) from saturated fatty acids, is frequently deregulated in both diabetes and CRC. The function and mechanism of SCD1 in metastasis of CRC and its relevance to glucose remains largely unknown. METHODS: SCD1 expression levels were analyzed in human CRC tissues and the Cancer Browser database ( https://genome-cancer...
March 12, 2018: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/29524401/ablation-of-prolactin-receptor-increases-hepatic-triglyceride-accumulation
#17
Shanshan Shao, Zhenyu Yao, Jiayu Lu, Yongfeng Song, Zhao He, Chunxiao Yu, Xiaoming Zhou, Lifang Zhao, Jiajun Zhao, Ling Gao
Increasing prevalence of non-alcoholic fatty liver disease (NAFLD) worldwide has necessitated a more thorough understanding of it and expanded the scope of research in this field. Women are more resistant to NAFLD than men despite equal exposure to major risk factors, such as obesity or hyperlipidemia. Female resistance is hormone-dependent, as evidenced by the sharp increase in NAFLD incidence in post-menopausal women who do not take hormone replacement therapy. Here, we found that the estrogen-responsive pituitary hormone prolactin (PRL), through specific PRL receptor (PRLR), down-regulates hepatic triglyceride (TG) accumulation...
March 7, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29520981/metabolic-effects-of-tofogliflozin-are-efficiently-enhanced-with-appropriate-dietary-carbohydrate-ratio-and-are-distinct-from-carbohydrate-restriction
#18
Shiori Ito, Toshio Hosaka, Wataru Yano, Takahiro Itou, Misako Yasumura, Yukari Shimizu, Hideyuki Kobayashi, Takashi Nakagawa, Keisuke Inoue, Sohei Tanabe, Takuma Kondo, Hitoshi Ishida
Sodium-glucose cotransporter 2 inhibitors (SGLT2i) exert their antidiabetic effects by promoting urinary glucose excretion. Nutrition therapy is obviously important, but little is known about the interactions between SGLT2i agents and carbohydrate restriction. Therefore, we studied these interactions using an obese diabetic animal model. KK-Ay mice were pair-fed normal chow [NC; carbohydrate: fat: protein = 65:15:20], low carbohydrate [LC; 43:42:15] or severely carbohydrate restricted diets [SR; 12:45:43] for 12 weeks...
March 2018: Physiological Reports
https://www.readbyqxmd.com/read/29518607/pedunculoside-a-novel-triterpene-saponin-extracted-from-ilex-rotunda-ameliorates-high-fat-diet-induced-hyperlipidemia-in-rats
#19
Chang Liu, Yan-Jun Shen, Qing-Bo Tu, Yan-Ran Zhao, Hao Guo, Juan Wang, Li Zhang, Hua-Wei Shi, Yun Sun
Pedunculoside (PE) is a novel triterpene saponin extracted from the dried barks of Ilex rotunda Thunb. The present study aims to explore lipid-lowering effects of PE on hyperlipidemia rat induced by high-fat diet. The rats were fed with the high-fat diet and subjected to intragastric administration of PE at doses of 30, 15, or 5 mg/kg daily for 7 weeks. The results demonstrated that treatment with PE for 7-week dramatically decreased serum total cholesterol (TC) and low-density lipoprotein cholesterol (LDL-C) and reduced liver TC in hyperlipidemia rat induced by high-fat diet...
March 5, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29514447/genome-wide-association-study-of-fatty-acid-composition-in-duroc-swine
#20
Vanessa Santos Viterbo, Bryan Irvine Mamuad Lopez, Hyun Sung Kang, Hoonseop Kim, Choul Won Song, Kang Seok Seo
Objective: Genome wide association study was conducted to identify and validate candidate genes associated with fatty acid composition of pork. Methods: A total of 480 purebreed Duroc pigs were genotyped using IlluminaPorcine60k bead chips while the association test was implemented following Genome-wide Rapid Association using Mixed Model and Regression-Genomic Control (GRAMMAR-GC) approach. Results: A total of 25, 29, and 16 single nucleotide polymorphisms (SNPs) were significantly associated with stearic (18:0), oleic (18:1) and saturated fatty acids (SFA), respectively...
March 2, 2018: Asian-Australasian Journal of Animal Sciences
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