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https://www.readbyqxmd.com/read/29143709/acute-and-chronic-cold-exposure-differentially-affects-the-browning-of-porcine-white-adipose-tissue
#1
Y Gao, N R Qimuge, J Qin, R Cai, X Li, G Y Chu, W J Pang, G S Yang
Piglets are characteristically cold intolerant and thus susceptible to high mortality. However, browning of white adipose tissue (WAT) can induce non-shivering thermogenesis as a potential strategy to facilitate the animal's response to cold. Whether cold exposure can induce browning of subcutaneous WAT (sWAT) in piglets in a similar manner as it can in humans remains largely unknown. In this study, piglets were exposed to acute cold (4°C, 10 h) or chronic cold exposure (8°C, 15 days), and the genes and proteins of uncoupling protein 1 (UCP1)-dependent and independent thermogenesis, mitochondrial biogenesis, lipogenic and lipolytic processes were analysed...
November 16, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29129783/hypoxia-induced-mir-214-expression-promotes-tumour-cell-proliferation-and-migration-by-enhancing-the-warburg-effect-in-gastric-carcinoma-cells
#2
Liuqing Yang, Weijie Zhang, Yanbo Wang, Tianhui Zou, Bin Zhang, Yuanyuan Xu, Taohong Pang, Qingqing Hu, Min Chen, Lei Wang, Ying Lv, Kai Yin, Hongwei Liang, Xi Chen, Guifang Xu, Xiaoping Zou
miR-214 is an important oncomiRNA and is upregulated in various types of cancer, including gastric cancer. However, the molecular mechanism underlying the ectopic expression and function of miR-214 in gastric cancer is largely undefined. In this study, we found that miR-214 induces the Warburg effect and promotes the migration and proliferation of human gastric cancer cells. According to the mechanistic analysis, miR-214 expression is induced by environmental hypoxia, and miR-214 mediates hypoxia-induced functions...
November 9, 2017: Cancer Letters
https://www.readbyqxmd.com/read/29105287/gut-microbiota-interacts-with-markers-of-adipose-tissue-browning-insulin-action-and-plasma-acetate-in-morbid-obesity
#3
José María Moreno-Navarrete, Matteo Serino, Vincent Blasco-Baque, Vincent Azalbert, Richard H Barton, Marina Cardellini, Jèssica Latorre, Francisco Ortega, Mònica Sabater-Masdeu, Rémy Burcelin, Marc-Emmanuel Dumas, Wifredo Ricart, Massimo Federici, José Manuel Fernández-Real
SCOPE: To examine the potential relationship among gene expression markers of adipose tissue browning, gut microbiota and insulin sensitivity in humans. METHODS AND RESULTS: Gut microbiota composition and gene markers of browning were analysed in subcutaneous (SAT) and visceral (VAT) adipose tissue from morbidly obese subjects (n = 34). Plasma acetate was measured through (1) H NMR and insulin sensitivity using euglycemic hyperinsulinemic clamp. Subjects with insulin resistance showed an increase in the relative abundance (RA) of the phyla Bacteroidetes and Proteobacteria while RA of Firmicutes was decreased...
November 3, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29081505/serotonin-prevents-differentiation-into-brown-adipocytes-and-induces-trans-differentiation-into-white-adipocytes
#4
S Rozenblit-Susan, N Chapnik, O Froy
BACKGROUND/OBJECTIVES: Serotonin is synthesized by many cells in the periphery to affect vasoconstriction, intestinal motility, and glucose and lipid metabolism. It has recently been shown that serotonin leads to fat accumulation in white adipose tissue (WAT). However, the direct effect of serotonin on adipose tissue (BAT) differentiation and metabolism is limited. Therefore, our aim was to investigate the effect of serotonin on brown adipocyte metabolism and differentiation. METHODS: Non-differentiated HIB1B cells and differentiated HIB1B brown adipocytes were treated with serotonin and their metabolism and differentiation examined...
October 30, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29066463/angiotensin-1-7-stimulates-brown-adipose-tissue-and-reduces-diet-induced-obesity
#5
Hidechika Morimoto, Jun Mori, Hisakazu Nakajima, Yasuhiro Kawabe, Yusuke Tsuma, Shota Fukuhara, Kazuki Kodo, Kazuya Ikoma, Satoaki Matoba, Gavin Y Oudit, Hajime Hosoi
The renin-angiotensin system is a key regulator of metabolism with beneficial effects of the angiotensin 1-7 peptide. We hypothesized that the anti-obesity effect of Ang 1-7 is related to the stimulation of brown adipose tissue (BAT). We administered Ang 1-7 (0.54 mg・kg(-1)・d(-1)) for 28 days via implanted micro-osmotic pumps to mice with high-fat diet (HFD) induced obesity. Ang 1-7 treatment reduced body weight, upregulated thermogenesis and ameliorated impaired glucose homeostasis without affecting food consumption...
October 24, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29064586/a-pivotal-role-of-ampk-signaling-in-medicarpin-mediated-formation-of-brown-and-beige-adipocytes-from-c3h10t1-2-mesenchymal-stem-cells
#6
Khan Mohammad Imran, Dahyeon Yoon, Yong-Sik Kim
Obesity poses a substantial threat of a worldwide epidemic and requires better understanding of adipose-tissue biology as well as necessitates research into the etiology and therapeutic interventions. In this study, Medicarpin (Med), a natural pterocarpan, was selected (by screening) as a small-molecule inducer of adipocyte differentiation among 854 candidates by using C3H10T1/2 mesenchymal stem cell; a cellular model of adipogenesis. Med induced the expression of brown-adipocyte commitment marker Bmp7 as well as the early regulators of brown fat fate Pparγ, Prdm16, and Pgc-1α during differentiation of C3H10T1/2 mesenchymal stem cells...
October 24, 2017: BioFactors
https://www.readbyqxmd.com/read/29063609/integrated-genome-analysis-of-uterine-leiomyosarcoma-to-identify-novel-driver-genes-and-targetable-pathways
#7
Tine Cuppens, Matthieu Moisse, Jeroen Depreeuw, Daniela Annibali, Eva Colas, Antonio Gil-Moreno, Jutta Huvila, Olli Carpén, Michal Zikán, Xavier Matias-Guiu, Philippe Moerman, Sabrina Croce, Diether Lambrechts, Frédéric Amant
Uterine leiomyosarcomas (uLMS) are rare, aggressive malignancies for which limited treatment options are available. To gain novel molecular insights into uLMS and identify potential novel therapeutic targets, we characterized 84 uLMS samples for genome-wide somatic copy number alterations, mutations, gene fusions and gene expression, and performed a data integration analysis. We found that alterations affecting TP53, RB1, PTEN, MED12, YWHAE and VIPR2 were present in the majority of uLMS. Pathway analyses additionally revealed that the PI3K/AKT/mTOR, estrogen-mediated S-phase entry and DNA damage response signaling pathways, for which inhibitors have already been developed and approved, frequently harbored genetic changes...
October 24, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29053761/the-transcription-factor-prdm16-marks-a-single-retinal-ganglion-cell-subtype-in-the-mouse-retina
#8
Sergio Groman-Lupa, Joseph Adewumi, Ko Uoon Park, Joseph A Brzezinski Iv
Purpose: Retinal ganglion cells (RGC) can be categorized into roughly 30 distinct subtypes. How these subtypes develop is poorly understood, in part because few unique subtype markers have been characterized. We tested whether the Prdm16 transcription factor is expressed by RGCs as a class or within particular ganglion cell subtypes. Methods: Embryonic and mature retinal sections and flatmount preparations were examined by immunohistochemistry for Prdm16 and several other cell type-specific markers...
October 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29031730/bidirectional-manipulation-of-gene-expression-in-adipocytes-using-crispra-and-sirna
#9
Morten Lundh, Kaja Pluciñska, Marie S Isidor, Patricia S S Petersen, Brice Emanuelli
OBJECTIVE: Functional investigation of novel gene/protein targets associated with adipocyte differentiation or function heavily relies on efficient and accessible tools to manipulate gene expression in adipocytes in vitro. Recent advances in gene-editing technologies such as CRISPR-Cas9 have not only eased gene editing but also greatly facilitated modulation of gene expression without altering the genome. Here, we aimed to develop and validate a competent in vitro adipocyte model of controllable functionality as well as multiplexed gene manipulation in adipocytes, using the CRISPRa "SAM" system and siRNAs to simultaneously overexpress and silence selected genes in the same cell populations...
October 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29021914/retinoic-acid-induces-white-adipose-tissue-browning-by-increasing-adipose-vascularity-and-inducing-beige-adipogenesis-of-pdgfr%C3%AE-adipose-progenitors
#10
Bo Wang, Xing Fu, Xingwei Liang, Jeanene M Deavila, Zhixiu Wang, Liang Zhao, Qiyu Tian, Junxing Zhao, Noe Alberto Gomez, Sophie C Trombetta, Mei-Jun Zhu, Min Du
Formation of beige adipocytes within white adipose tissue enhances energy expenditure, which is a promising strategy to reduce obesity and prevent metabolic symptoms. Vitamin A and its bioactive metabolite, retinoic acid (RA), have regulatory roles in lipid metabolism. Here we report that RA induces white adipose tissue browning via activating vascular endothelial growth factor (VEGF) signaling. RA triggered angiogenesis and elicited de novo generation of platelet-derived growth factor receptor α positive (PDGFRα(+)) adipose precursor cells via VEGFA/VEGFR2 signaling...
2017: Cell Discovery
https://www.readbyqxmd.com/read/29019320/distinct-cellular-and-molecular-mechanisms-for-%C3%AE-3-adrenergic-receptor-induced-beige-adipocyte-formation
#11
Yuwei Jiang, Daniel C Berry, Jonathan M Graff
Beige/brite adipocytes are induced within white adipose tissues (WAT) and, when activated, consume glucose and fatty acids to produce heat. Classically, two stimuli have been used to trigger a beiging response: cold temperatures and β3-adrenergic receptor (Adrb3) agonists. These two beiging triggers have been used interchangeably but whether these two stimuli may induce beiging differently at cellular and molecular levels remains unclear. Here, we found that cold-induced beige adipocyte formation requires Adrb1, not Adrb3, activation...
October 11, 2017: ELife
https://www.readbyqxmd.com/read/28988768/crosstalk-between-kcnk3-mediated-ion-current-and-adrenergic-signaling-regulates-adipose-thermogenesis-and-obesity
#12
Yi Chen, Xing Zeng, Xuan Huang, Sara Serag, Clifford J Woolf, Bruce M Spiegelman
Adrenergic stimulation promotes lipid mobilization and oxidation in brown and beige adipocytes, where the harnessed energy is dissipated as heat in a process known as adaptive thermogenesis. The signaling cascades and energy-dissipating pathways that facilitate thermogenesis have been extensively described, yet little is known about the counterbalancing negative regulatory mechanisms. Here, we identify a two-pore-domain potassium channel, KCNK3, as a built-in rheostat negatively regulating thermogenesis. Kcnk3 is transcriptionally wired into the thermogenic program by PRDM16, a master regulator of thermogenesis...
November 2, 2017: Cell
https://www.readbyqxmd.com/read/28934139/phyllodulcin-a-natural-sweetener-regulates-obesity-related-metabolic-changes-and-fat-browning-related-genes-of-subcutaneous-white-adipose-tissue-in-high-fat-diet-induced-obese-mice
#13
Eunju Kim, Soo-Min Lim, Min-Soo Kim, Sang-Ho Yoo, Yuri Kim
Phyllodulcin is a natural sweetener found in Hydrangea macrophylla var. thunbergii. This study investigated whether phyllodulcin could improve metabolic abnormalities in high-fat diet (HFD)-induced obese mice. Animals were fed a 60% HFD for 6 weeks to induce obesity, followed by 7 weeks of supplementation with phyllodulcin (20 or 40 mg/kg body weight (b.w.)/day). Stevioside (40 mg/kg b.w./day) was used as a positive control. Phyllodulcin supplementation reduced subcutaneous fat mass, levels of plasma lipids, triglycerides, total cholesterol, and low-density lipoprotein cholesterol and improved the levels of leptin, adiponectin, and fasting blood glucose...
September 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28930673/pexrap-inhibits-prdm16-mediated-thermogenic-gene-expression
#14
Irfan J Lodhi, John M Dean, Anyuan He, Hongsuk Park, Min Tan, Chu Feng, Haowei Song, Fong-Fu Hsu, Clay F Semenkovich
How the nuclear receptor PPARγ regulates the development of two functionally distinct types of adipose tissue, brown and white fat, as well as the browning of white fat, remains unclear. Our previous studies suggest that PexRAP, a peroxisomal lipid synthetic enzyme, regulates PPARγ signaling and white adipogenesis. Here, we show that PexRAP is an inhibitor of brown adipocyte gene expression. PexRAP inactivation promoted adipocyte browning, increased energy expenditure, and decreased adiposity. Identification of PexRAP-interacting proteins suggests that PexRAP function extends beyond its role as a lipid synthetic enzyme...
September 19, 2017: Cell Reports
https://www.readbyqxmd.com/read/28925407/foxc2-coordinates-inflammation-and-browning-of-white-adipose-by-leptin-stat3-prdm16-signal-in-mice
#15
L Gan, Z Liu, F Feng, T Wu, D Luo, C Hu, C Sun
AIMS: The objective of this study is to characterize the relationship between forkhead box C2 protein (Foxc2) and leptin under adipose inflammatory response. METHODS: Lipopolysaccharide (LPS)-induced inflammatory model was conducted. Data from wild-type and ob/ob mice were used to compare the alternative role of leptin on Foxc2-mediated inflammation and browning. Transcriptional regulation and protein-protein interaction were analyzed by bioinformatics and proved by chromatin immunoprecipitation and co-immunoprecipitation experiment...
August 23, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28924151/dna-methylomes-reveal-biological-networks-involved-in-human-eye-development-functions-and-associated-disorders
#16
María Berdasco, Antonio Gómez, Marcos J Rubio, Jaume Català-Mora, Vicente Zanón-Moreno, Miguel Lopez, Cristina Hernández, Shigeo Yoshida, Takahito Nakama, Keijiro Ishikawa, Tatsuro Ishibashi, Amina M Boubekeur, Lotfi Louhibi, Miguel A Pujana, Sergi Sayols, Fernando Setien, Dolores Corella, Carmen de Torres, Andreu Parareda, Jaume Mora, Ling Zhao, Kang Zhang, Matilde E Lleonart, Javier Alonso, Rafael Simó, Josep M Caminal, Manel Esteller
This work provides a comprehensive CpG methylation landscape of the different layers of the human eye that unveils the gene networks associated with their biological functions and how these are disrupted in common visual disorders. Herein, we firstly determined the role of CpG methylation in the regulation of ocular tissue-specification and described hypermethylation of retinal transcription factors (i.e., PAX6, RAX, SIX6) in a tissue-dependent manner. Second, we have characterized the DNA methylome of visual disorders linked to internal and external environmental factors...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28870477/a-low-protein-high-carbohydrate-diet-increases-browning-in-perirenal-adipose-tissue-but-not-in-inguinal-adipose-tissue
#17
Mayara P Pereira, Laís A A Ferreira, Flávia H S da Silva, Marcelo A Christoffolete, George S Metsios, Valéria E Chaves, Suélem A de França, Amílcar S Damazo, Andreas D Flouris, Nair H Kawashita
OBJECTIVE: The aim of this study was to evaluate the browning and origin of fatty acids (FAs) in the maintenance of triacylglycerol (TG) storage and/or as fuel for thermogenesis in perirenal adipose tissue (periWAT) and inguinal adipose tissue (ingWAT) of rats fed a low-protein, high-carbohydrate (LPHC) diet. METHODS: LPHC (6% protein, 74% carbohydrate) or control (C; 17% protein, 63% carbohydrate) diets were administered to rats for 15 d. The tissues were stained with hematoxylin and eosin for histologic analysis...
October 2017: Nutrition
https://www.readbyqxmd.com/read/28867720/chronic-rapamycin-treatment-improved-metabolic-phenotype-but-inhibited-adipose-tissue-browning-in-high-fat-diet-fed-c57bl-6j-mice
#18
Yan Wang, Zhi He, Xianhui Li
Rapamycin (Rap) has been demonstrated to affect lipid metabolism through stimulating lipolysis, inhibiting de novo lipogenesis and reducing adiposity. In the present study, we investigated rapamycin exposure's influence on adipose tissue browning in high-fat diet-induced fatty mice. Four-week old C57BL/6J mice were fed normal chow or high-fat diet for a period of 6 weeks and then divided into three groups: (1) Nor group: mice fed with normal chow; (2) high fat diet (HFD) group: fatty mice fed with high-fat diet; (3) Rap group: high-fat diet-fed fatty mice treated intragastrically with rapamycin at a dose of 2...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28854265/zinc-transporter-zip13-suppresses-beige-adipocyte-biogenesis-and-energy-expenditure-by-regulating-c-ebp-%C3%AE-expression
#19
Ayako Fukunaka, Toshiyuki Fukada, Jinhyuk Bhin, Luka Suzuki, Takamasa Tsuzuki, Yuri Takamine, Bum-Ho Bin, Toshinori Yoshihara, Noriko Ichinoseki-Sekine, Hisashi Naito, Takeshi Miyatsuka, Shinzaburo Takamiya, Tsutomu Sasaki, Takeshi Inagaki, Tadahiro Kitamura, Shingo Kajimura, Hirotaka Watada, Yoshio Fujitani
Given the relevance of beige adipocytes in adult humans, a better understanding of the molecular circuits involved in beige adipocyte biogenesis has provided new insight into human brown adipocyte biology. Genetic mutations in SLC39A13/ZIP13, a member of zinc transporter family, are known to reduce adipose tissue mass in humans; however, the underlying mechanisms remains unknown. Here, we demonstrate that the Zip13-deficient mouse shows enhanced beige adipocyte biogenesis and energy expenditure, and shows ameliorated diet-induced obesity and insulin resistance...
August 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28827782/extracellular-calcium-modulates-brown-adipocyte-differentiation-and-identity
#20
Ines Pramme-Steinwachs, Martin Jastroch, Siegfried Ussar
Brown adipocytes are important in regulating non-shivering thermogenesis, whole body glucose and lipid homeostasis. Increasing evidence supports an important role of metabolites as well as macro- and micronutrients in brown adipocyte differentiation and function. Calcium is one of the most abundant ions in the body regulating multiple cellular processes. We observed that increasing extracellular calcium concentration during brown adipocyte differentiation blocks lipid accumulation and suppresses induction of major adipogenic transcription factors such as PPARγ and C/EBPα...
August 21, 2017: Scientific Reports
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