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https://www.readbyqxmd.com/read/28645211/akr1c3-mediated-adipose-androgen-generation-drives-lipotoxicity-in-women-with-polycystic-ovary-syndrome
#1
Michael W O'Reilly, Punith Kempegowda, Mark Walsh, Angela E Taylor, Konstantinos N Manolopoulos, J William Allwood, Robert K Semple, Daniel Hebenstreit, Warwick B Dunn, Jeremy W Tomlinson, Wiebke Arlt
Context: Polycystic ovary syndrome (PCOS) is a prevalent metabolic disorder, occurring in up to 10% of women of reproductive age. PCOS is associated with insulin resistance and cardiovascular risk. Androgen excess is a defining feature of PCOS and has been suggested as causally associated with insulin resistance; however, mechanistic evidence linking both is lacking. We hypothesized that adipose tissue is an important site linking androgen activation and metabolic dysfunction in PCOS...
June 22, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28645103/colxv-promotes-adipocyte-differentiation-via-inhibiting-dna-methylation-and-camp-pka-pathway-in-mice
#2
Guannv Liu, Meihang Li, Yatao Xu, Song Wu, Muhammad Saeed, Chao Sun
Extracellular matrix (ECM), as an essential component of adipose tissue, not only provides mechanical support for adipocyte growth, but also participates in ECM-adipocyte communication via various secreted proteins, including highly enriched collagens. Collagen XV (ColXV) is a secreted non-fibrillar collagen within ECM Basement Membrane (BM) zones and well recognized as a tumor suppressor. However, the role of ColXV in adipose tissue is still unknown. In this study, high fat diet (HFD) fed mice were used as obese model, in which we deeply investigated the interaction between ColXV and adipocyte differentiation or adipose metabolism...
June 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28644916/cover-image-volume-232-number-10-october-2017
#3
Giulia Maurizi, Antonella Poloni, Domenico Mattiucci, Spartaco Santi, Angela Maurizi, Valerio Izzi, Angelica Giuliani, Stefania Mancini, Maria Cristina Zingaretti, Jessica Perugini, Ilenia Severi, Massimo Falconi, Marco Vivarelli, Maria Rita Rippo, Silvia Corvera, Antonio Giordano, Pietro Leoni, Saverio Cinti
Cover: The cover image, by Giulia Maurizi et al., is based on the Original Research Article Human White Adipocytes Convert Into "Rainbow" Adipocytes In Vitro, DOI: 10.1002/jcp.25743.
October 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28643888/combination-of-citrus-polymethoxyflavones-green-tea-polyphenols-and-lychee-extracts-suppresses-obesity-and-hepatic-steatosis-in-high-fat-diet-induced-obese-mice
#4
Min-Hsiung Pan, Guliang Yang, Shiming Li, Ming-Yi Li, Mei-Ling Tsai, Jia-Ching Wu, Vladimir Badmaev, Chi-Tang Ho, Ching-Shu Lai
SCOPE: SlimTrym(®) is a formulated product composed of citrus polymethoxyflavones (PMFs), green tea extract and lychee extract. We investigated the effect of dietary SlimTrym(®) on diet-induced obesity and associated non-alcoholic fatty liver disease (NAFLD) in mice. METHODS AND RESULTS: Male C57BL/6 mice were fed a normal diet (ND), high fat diet (HFD) or HFD containing 0.1% or 0.5% SlimTrym(®) for sixteen weeks. Dietary SlimTrym(®) significantly reduced weight gain and relative perigonadal, retroperitoneal, mesenteric fat weight as well as the size of adipocyte in HFD-fed mice...
June 23, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28643028/polycystic-ovary-syndrome-adipose-tissue-and-metabolic-syndrome
#5
REVIEW
Alessandro P Delitala, Giampiero Capobianco, Giuseppe Delitala, Pier Luigi Cherchi, Salvatore Dessole
PURPOSE: Polycystic ovary syndrome (PCOS) is the most common endocrine disorder that affects women of reproductive age and is characterized by ovulatory dysfunction and/or androgen excess or polycystic ovaries. Women with PCOS present a number of systemic symptoms in addition to those related to the reproductive system. It has been associated with functional derangements in adipose tissue, metabolic syndrome, type 2 diabetes, and an increased risk of cardiovascular disease (CVD). METHODS: A detailed literature search on Pubmed was done for articles about PCOS, adipokines, insulin resistance, and metabolic syndrome...
June 22, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28642596/sgbs-cells-as-a-model-of-human-adipocyte-browning-a-comprehensive-comparative-study-with-primary-human-white-subcutaneous-adipocytes
#6
Chia Rou Yeo, Madhur Agrawal, Shawn Hoon, Asim Shabbir, Manu Kunaal Shrivastava, Shiqi Huang, Chin Meng Khoo, Vanna Chhay, M Shabeer Yassin, E Shyong Tai, Antonio Vidal-Puig, Sue-Anne Toh
The Simpson Golabi Behmel Syndrome (SGBS) pre-adipocyte cell strain is widely considered to be a representative in vitro model of human white pre-adipocytes. A recent study suggested that SGBS adipocytes exhibit an unexpected transient brown phenotype. Here, we comprehensively examined key differences between SGBS adipocytes and primary human white subcutaneous (PHWSC) adipocytes. RNA-Seq analysis revealed that extracellular matrix (ECM)-receptor interaction and metabolic pathways were the top two KEGG pathways significantly enriched in SGBS adipocytes, which included positively enriched mitochondrial respiration and oxidation pathways...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642579/regulation-of-glycolysis-in-brown-adipocytes-by-hif-1%C3%AE
#7
Astrid L Basse, Marie S Isidor, Sally Winther, Nina B Skjoldborg, Maria Murholm, Elise S Andersen, Steen B Pedersen, Christian Wolfrum, Bjørn Quistorff, Jacob B Hansen
Brown adipose tissue takes up large amounts of glucose during cold exposure in mice and humans. Here we report an induction of glucose transporter 1 expression and increased expression of several glycolytic enzymes in brown adipose tissue from cold-exposed mice. Accordingly, these genes were also induced after β-adrenergic activation of cultured brown adipocytes, concomitant with accumulation of hypoxia inducible factor-1α (HIF-1α) protein levels. HIF-1α accumulation was dependent on uncoupling protein 1 and generation of mitochondrial reactive oxygen species...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642037/testosterone-regulates-3t3-l1pre-adipocyte-differentiation-and-epididymal-fat-accumulation-in-mice-through-modulating-macrophage-polarization
#8
Xiaojiao Ren, Xiaojian Fu, Xinhua Zhang, Shiqiang Chen, Shuguang Huang, Lun Yao, Guoquan Liu
Low testosterone levels are strongly related to obesity in males. The balance between the classically M1 and alternatively M2 polarized macrophages also plays a critical role in obesity. It is not clear whether testosterone regulates macrophage polarization and then affects adipocyte differentiation. In this report, we demonstrate that testosterone strengthens interleukin (IL) -4-induced M2 polarization and inhibits lipopolysaccharide (LPS) -induced M1 polarization, but has no direct effect on adipocyte differentiation...
June 19, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28641987/food-deprivation-in-f0-generation-and-hypercaloric-diet-in-f1-generation-reduce-f2-generation-astrogliosis-in-several-brain-areas-after-immune-challenge
#9
T B Ogassawara, A Joaquim, C P Coelho, M M Bernardi, E Teodorov, M F M Martins, T B Kirsten, L V Bonamin, P D Dossa, L B Viebig, E F Bondan
AIMS: The effects of maternal food restriction during gestation in F0 generation followed by hypercaloric diet (HD) during puberty in F1 generation (F1HD) were investigated on astrocyte behavior of F2 generation. Also, the astrocyte behavior, after an immune challenge, was examined by the immunohistochemical expression of glial fibrillary acidic protein (GFAP) in several brain areas. METHODS: The body weight gain (BW) during development and in postnatal day (PND) 90-95, the retroperitoneal fat weight (RPF), and the size of larger and smaller adipocytes in the F1 generation were assessed to observe the effects of HD in female rats...
June 19, 2017: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28641779/macrophage-functions-in-lean-and-obese-adipose-tissue
#10
REVIEW
Dylan Thomas, Caroline Apovian
Interactions between macrophages and adipocytes influence both metabolism and inflammation. Obesity-induced changes to macrophages and adipocytes lead to chronic inflammation and insulin resistance. This paper reviews the various functions of macrophages in lean and obese adipose tissue and how obesity alters adipose tissue macrophage phenotypes. Metabolic disease and insulin resistance shift the balance between numerous pro- and anti-inflammatory regulators of macrophages and create a feed-forward loop of increasing inflammatory macrophage activation and worsening adipocyte dysfunction...
July 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28641777/role-of-parl-pink1-parkin-pathway-in-adipocyte-differentiation
#11
Ming-Yuh Shiau, Pin-Shen Lee, Ying-Jyun Huang, Ching-Ping Yang, Chiao-Wan Hsiao, Kai-Yun Chang, Huan-Wen Chen, Yih-Hsin Chang
OBJECTIVE: Adipogenesis determines the number of adipocytes which is increased when individuals become obese. Mitochondria undergo remarkable morphological and functional changes during adipogenesis. PTEN-induced kinase 1 (PINK1) is pivotal to maintain mitochondrial homeostasis in neural cells. The present study aimed at investigating effects of PINK1 on adipogenesis and energy metabolism. METHODS: Expression of presenilin associated rhomboid-like protein (PARL), PINK1 and Parkin, as well as the interaction among these proteins was temporally examined during adipogenesis...
July 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28640866/diet-induced-adipose-tissue-expansion-is-mitigated-in-mice-with-a-targeted-inactivation-of-mesoderm-specific-transcript-mest
#12
Rea P Anunciado-Koza, Justin Manuel, Randall L Mynatt, Jingying Zhang, Leslie P Kozak, Robert A Koza
Interindividual variation of white adipose tissue (WAT) expression of mesoderm specific transcript (Mest), a paternally-expressed imprinted gene belonging to the α/β-hydrolase fold protein family, becomes apparent among genetically inbred mice fed high fat diet (HFD) and is positively associated with adipose tissue expansion (ATE). To elucidate a role for MEST in ATE, mice were developed with global and adipose tissue inactivation of Mest. Mice with homozygous (MestgKO) and paternal allelic (MestpKO) inactivation of Mest were born at expected Mendelian frequencies, showed no behavioral or physical abnormalities, and did not perturb expression of the Mest locus-derived microRNA miR-335...
2017: PloS One
https://www.readbyqxmd.com/read/28640518/a-carborane-containing-fluorophore-as-a-stain-of-cellular-lipid-droplets
#13
Andrew Wu, Jacek L Kolanowski, Badwi B Boumelhem, Kylie Yang, Rebecca Lee, Amandeep Kaur, Stuart T Fraser, Elizabeth J New, Louis M Rendina
The use of fluorescent markers and probes greatly enhances biological investigations but relies on the provision of an array of fluorophores with diverse properties. Herein we report a novel carborane-containing coumarin, 5, which is sufficiently lipophilic to localise in cellular lipid droplets. In non-polar solvents which show comparable polarities to those of a lipid environment, compound 5 exhibits a fluorescence quantum yield two orders of magnitude greater than found in aqueous solvents, adding a further degree of selectivity to lipid droplet imaging...
June 22, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28640452/role-of-epicardial-adipose-tissue-in-health-and-disease-a-matter-of-fat
#14
Bénédicte Gaborit, Coralie Sengenes, Patricia Ancel, Alexis Jacquier, Anne Dutour
Epicardial adipose tissue (EAT) is a small but very biologically active ectopic fat depot that surrounds the heart. Given its rapid metabolism, thermogenic capacity, unique transcriptome, secretory profile, and simply measurability, epicardial fat has drawn increasing attention among researchers attempting to elucidate its putative role in health and cardiovascular diseases. The cellular crosstalk between epicardial adipocytes and cells of the vascular wall or myocytes is high and suggests a local role for this tissue...
June 18, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28640441/adipose-tissue-derived-omentin-1-function-and-regulation
#15
Takuya Watanabe, Kaho Watanabe-Kominato, Yui Takahashi, Miho Kojima, Rena Watanabe
Omentin-1, also known as intelectin-1, is a recently identified novel adipocytokine of 313 amino acids, which is expressed in visceral (omental and epicardial) fat as well as mesothelial cells, vascular cells, airway goblet cells, small intestine, colon, ovary, and plasma. The level of omentin-1 expression in (pre)adipocytes is decreased by glucose/insulin and stimulated by fibroblast growth factor-21 and dexamethasone. Several lines of experimental evidence have shown that omentin-1 plays crucial roles in the maintenance of body metabolism and insulin sensitivity, and has anti-inflammatory, anti-atherosclerotic, and cardiovascular protective effects via AMP-activated protein kinase/Akt/nuclear factor-κB/mitogen-activated protein kinase (ERK, JNK, and p38) signaling...
June 18, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28640098/the-characteristics-of-stem-cells-in-human-degenerative-intervertebral-disc
#16
Lin Liang, Xuefeng Li, Dapeng Li, Weimin Jiang, Heng Wang, Jie Chen, Zhiyong Sun, Niannian Zhang, Yangyi Zhu
BACKGROUND: The aim of this study is to identify which possessed the best stem-cell-like characteristics in 3 kinds of cell in human degenerative intervertebral disc: NPSCs (nucleus pulposus-derived stem cells), AFSCs (annulus fibrosus-derived stem cells), or CESCs (cartilage endplate-derived stem cells). METHODS: We separated the disc samples obtained from 15 surgically treated patients with disc degenerative diseases into nucleus pulposus, annulus fibrosus, and cartilage endplate...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28638929/-research-progress-of-neuregulin-4-biological-function
#17
Fan Yang, Xiao-Nan Li
Neuregulin 4 (NRG4) is a kind of protein containing epidermal growth factor (EGF)-like domains, mainly expressed and secreted by brown adipocytes. It specifically activates EGF receptor ErbB4 (v-erb-b2 avian erythroblastic leukemia viral oncogene homolog 4) to stimulate cell proliferation, inhibit apoptosis and improve energy metabolism of cells. Increasing evidence has shown that NRG4 plays an important role in epithelial cell-related diseases, cardiovascular diseases, tumors and glycolipid metabolic diseases, and therefore it could be a potential therapeutic target of some diseases...
June 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28638152/combination-of-a-high-fat-diet-with-sweetened-condensed-milk-exacerbates-inflammation-and-insulin-resistance-induced-by-each-separately-in-mice
#18
Laureane Nunes Masi, Amanda Roque Martins, Amanda Rabello Crisma, Cátia Lira do Amaral, Mariana Rodrigues Davanso, Tamires Duarte Afonso Serdan, Roberta Dourado Cavalcante da Cunha de Sá, Maysa Mariana Cruz, Maria Isabel Cardoso Alonso-Vale, Rosângela Pavan Torres, Jorge Mancini-Filho, Joice Naiara Bertaglia Pereira, Marta Maria da Silva Righetti, Edson Aparecido Liberti, Sandro Massao Hirabara, Rui Curi
Obesogenic diets increase body weight and cause insulin resistance (IR), however, the association of these changes with the main macronutrient in the diet remains to be elucidated. Male C57BL/6 mice were fed with: control (CD), CD and sweetened condensed milk (HS), high-fat (HF), and HF and condensed milk (HSHF). After 2 months, increased body weight, glucose intolerance, adipocyte size and cholesterol levels were observed. As compared with CD, HS ingested the same amount of calories whereas HF and HSHF ingested less...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28637122/a-new-cinnamic-acid-glycoside-from-roots-of-heracleum-dissectum
#19
Zhi-Gang Wang, Jie Mi, Xin-Rui Wang, Ya-Yu Huo, Ya-Jie Peng, Hai-Min Zhang, Yang Gao, Hai-Long Zhang
From the roots of Heracleum dissectum Lebb., one new cinnamic acid glycoside derivative named dissectumoside (1), together with eight known compounds including three phenolics, three phenolic glycosides and two phenylpropanoic glycoside were isolated using various chromatographic methods. Among them compound 2-9 was isolated from the plant for the first time. Their structures were elucidated and identified on the basis of their physicochemical properties and by extensive analyses of NMR spectroscopy and high-resolution mass spectrometry...
June 15, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28635652/fucaceae-a-source-of-bioactive-phlorotannins
#20
REVIEW
Marcelo D Catarino, Artur M S Silva, Susana M Cardoso
Fucaceae is the most dominant algae family along the intertidal areas of the Northern Hemisphere shorelines, being part of human customs for centuries with applications as a food source either for humans or animals, in agriculture and as remedies in folk medicine. These macroalgae are endowed with several phytochemicals of great industrial interest from which phlorotannins, a class of marine-exclusive polyphenols, have gathered much attention during the last few years due to their numerous possible therapeutic properties...
June 21, 2017: International Journal of Molecular Sciences
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