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adipocyte differentiation

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https://www.readbyqxmd.com/read/28102847/curcumin-represses-mouse-3t3-l1-cell-adipogenic-differentiation-via-inhibiting-mir-17-5p-and-stimulating-the-wnt-signalling-pathway-effector-tcf7l2
#1
Lili Tian, Zhuolun Song, Weijuan Shao, William W Du, Lisa R Zhao, Kejing Zeng, Burton B Yang, Tianru Jin
Understanding mechanisms underlying adipogenic differentiation may lead to the discovery of novel therapeutic targets for obesity. Wnt signalling pathway activation leads to repressed adipogenic differentiation while certain microRNAs may regulate pre-adipocyte proliferation and differentiation. We show here that in mouse white adipose tissue, miR-17-5p level is elevated after high fat diet consumption. miR-17-5p upregulates adipogenic differentiation, as its over-expression increased while its inhibition repressed 3T3-L1 differentiation...
January 19, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28102844/human-adipose-stem-cell-differentiation-is-highly-affected-by-cancer-cells-both-in-vitro-and-in-vivo-implication-for-autologous-fat-grafting
#2
Francesca Paino, Marcella La Noce, Diego Di Nucci, Giovanni Francesco Nicoletti, Rosa Salzillo, Alfredo De Rosa, Giuseppe Andrea Ferraro, Gianpaolo Papaccio, Vincenzo Desiderio, Virginia Tirino
Recent studies showed that mesenchymal stem cells derived from adipose tissue can promote tumour progression, raising some concerns regarding their use in regenerative medicine. In this context, we co-cultured either SAOS2 osteosarcoma or MCF7 breast cancer cells with human adipose stem cells (hASCs), in order to evaluate potential effects of cancer cells on hASCs differentiation, in vitro and in vivo. In this study we observed that both SAOS2 and MCF7 cell lines induced an increase in hASCs proliferation, compared to hASCs alone, but, surprisingly, neither changes in the expression of CD90, CD29, CD324 and vimentin, nor variations in the Twist and Slug mRNAs were detectable...
January 19, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28100914/tet-mediated-hydroxymethylcytosine-at-the-ppar%C3%AE-locus-is-required-for-initiation-of-adipogenic-differentiation
#3
Y Yoo, J H Park, C Weigel, D B Liesenfeld, D Weichenhan, C Plass, D-G Seo, A M Lindroth, Y J Park
BACKGROUND/OBJECTIVES: Adipose tissue is one of the main organs regulating energy homeostasis, via energy storage as well as endocrine function. The adipocyte cell number is largely determined by adipogenesis. While the molecular mechanism of adipogenesis has been extensively studied, its role in dynamic DNA methylation plasticity remains unclear. Recently, it has been shown that Tet methylcytosine dioxygenase (TET) are catalytically capable of oxidizing DNA 5-methylcytosine (5-mC) to 5-hydroxymethylcytosine (5-hmC) towards a complete removal of the methylated cytosine...
January 19, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28100772/de-novo-sphingolipid-biosynthesis-is-required-for-adipocyte-survival-and-metabolic-homeostasis
#4
Aikaterini Alexaki, Benjamin A Clarke, Oksana Gavrilova, Yinyan Ma, Hongling Zhu, Xinran Ma, Lingyan Xu, Galina Tuymetova, Bridget C Larman, Maria L Allende, Teresa M Dunn, Richard L Proia
Sphingolipids are a diverse class of essential cellular lipids that function as structural membrane components and as signaling molecules. Cells acquire sphingolipids by both de novo biosynthesis and recycling of exogenous sphingolipids. The individual importance of these pathways for the generation of essential sphingolipids in differentiated cells is not well understood. To investigate the requirement for de novo sphingolipid biosynthesis in adipocytes, a cell type with highly regulated lipid metabolism, we generated mice with an adipocyte-specific deletion of Sptlc1 Sptlc1 is an obligate subunit of serine palmitoyltransferase, the enzyme responsible for the first and rate-limiting step of de novo sphingolipid biosynthesis...
January 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28100227/prenatal-and-postnatal-mothering-by-diesel-exhaust-pm2-5-exposed-dams-differentially-program-mouse-energy-metabolism
#5
Minjie Chen, Shuai Liang, Huifen Zhou, Yanyi Xu, Xiaobo Qin, Ziying Hu, Xiaoke Wang, Lianglin Qiu, Wanjun Wang, Yuhao Zhang, Zhekang Ying
BACKGROUND: Obesity is one of the leading threats to global public health. It is consequent to abnormal energy metabolism. Currently, it has been well established that maternal exposure to environmental stressors that cause inappropriate fetal development may have long-term adverse effects on offspring energy metabolism in an exposure timing-dependent manner, known as developmental programming of health and diseases paradigm. Rapidly increasing evidence has indicated that maternal exposure to ambient fine particles (PM2...
January 18, 2017: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/28098517/antiobesity-effects-of-sansa-crataegi-fructus-on-3t3-l1-cells-and-on-high-fat-high-cholesterol-diet-induced-obese-rats
#6
Jae-Joon Lee, Hyun-Joo Lee, Seon-Woo Oh
This study was performed to investigate the effects of Crataegi fructus ethanol extracts (CFEEs) on the differentiation of 3T3-L1 cells, and to evaluate the effects of C. fructus powder (CFP) on lipid metabolism and its antiobesity effect in rats fed a high-fat and high-cholesterol (HFC) diet. Both in vitro and in vivo studies were performed for physiological activity and antiobesity effects on the serum, liver, and adipose tissues in obesity-induced rats. CFEEs showed significant inhibitory action on differentiation and triglyceride (TG) accumulation in 3T3-L1 mature cells in a dose-dependent manner...
January 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28096544/simamycin-5-o-geranyluridine-a-new-prenylated-nucleoside-from-streptomyces-sp
#7
Yasuhiro Igarashi, Takayuki Kyoso, Youngju Kim, Tsutomu Oikawa
A new nucleoside modified by prenylation, simamycin (1), was isolated from the culture broth of a soil-derived Streptomyces sp. Its structure was determined by spectroscopic analysis and chemical synthesis as 5'-O-geranyluridine. Compound 1 induced differentiation of preadipocytes into matured adipocytes.The Journal of Antibiotics advance online publication, 18 January 2017; doi:10.1038/ja.2016.163.
January 18, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/28096344/atrial-natriuretic-peptide-regulates-adipose-tissue-accumulation-in-adult-atria
#8
Nadine Suffee, Thomas Moore-Morris, Patrick Farahmand, Catherine Rücker-Martin, Gilles Dilanian, Magali Fradet, Daigo Sawaki, Geneviève Derumeaux, Pascal LePrince, Karine Clément, Isabelle Dugail, Michel Puceat, Stéphane N Hatem
The abundance of epicardial adipose tissue (EAT) is associated with atrial fibrillation (AF), the most frequent cardiac arrhythmia. However, both the origin and the factors involved in EAT expansion are unknown. Here, we found that adult human atrial epicardial cells were highly adipogenic through an epithelial-mesenchymal transition both in vitro and in vivo. In a genetic lineage tracing the WT1(CreERT2+/-)Rosa(tdT+/-) mouse model subjected to a high-fat diet, adipocytes of atrial EAT derived from a subset of epicardial progenitors...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28095800/diet-gonadal-sex-and-sex-chromosome-complement-influence-white-adipose-tissue-mirna-expression
#9
Jenny C Link, Yehudit Hasin-Brumshtein, Rita M Cantor, Xuqi Chen, Arthur P Arnold, Aldons J Lusis, Karen Reue
BACKGROUND: MicroRNAs (miRNAs) are small non-coding RNA molecules that regulate gene expression by targeting specific mRNA species for degradation or interfering with translation. Specific miRNAs are key regulators of adipogenesis, and are expressed at different levels in adipose tissue from lean and obese mice. The degree of lipid accumulation and distribution of white adipose tissue differs between males and females, and it is unknown whether sex differences in adipose tissue-specific miRNA expression may contribute to this dimorphism...
January 17, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28093994/viral-infection-and-obesity-current-status-and-future-prospective
#10
Sayed Sartaj Sohrab, Mohammad Amjad Kamal, Richard L Atkinson, Maha M Alawi, Esam I Azhar
The association of pathogenic viruses with obesity has now been well-known in both human and animals. Globally, human obesity has become a serious problem leading to the emergence of multiple life-threatening diseases. Adenoviruses contribute a significant role in the induction of obesity by affecting various pathways. Due to impaired immunity, obese individuals are more prone to nosocomial infections leading to complications of obesity. In contrast, several other important factors contributing to human obesity are known...
January 16, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28088621/4-hydroxynonenal-causes-impairment-of-human-subcutaneous-adipogenesis-and-induction-of-adipocyte-insulin-resistance
#11
Mohamed A Elrayess, Shamma Almuraikhy, Wael Kafienah, Afnan Al-Menhali, Fatima Al-Khelaifi, Moataz Bashah, Kamelija Zarkovic, Neven Zarkovic, Georg Waeg, Mohammed Alsayrafi, Morana Jaganjac
OBJECTIVE: Increased adipose production of 4-hydroxynonenal (4-HNE), a bioreactive aldehyde, directly correlates with obesity and insulin resistance. The aim of this study was to elucidate the impact of 4-HNE in mediating adipocyte differentiation and function in two metabolically distinct obese groups; the insulin sensitive (IS) and the insulin resistant (IR). METHODS: Subcutaneous (SC) adipose tissues were obtained from eighteen clinically well characterized obese premenopausal women undergoing weight reduction surgery...
January 12, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28088466/teneurin-2-tenm2-deficiency-induces-ucp1-expression-in-differentiating-human-fat-cells
#12
D Tews, T Fromme, M Keuper, S M Hofmann, K M Debatin, M Klingenspor, M Wabitsch, P Fischer-Posovszky
Under certain conditions UCP1 expressing adipocytes arise in white adipose tissue depots of both mice and humans. It is still not fully understood whether these cells differentiate de novo from specific progenitor cells or if they transdifferentiate from mature white adipocytes. Performing expression pattern analysis comparing adipocyte progenitor cells from deep and subcutaneous neck adipose tissue, we recently identified teneurin-2 (TENM2) enriched in white adipocyte progenitor cells. Here we tested whether TENM2 deficiency in adipocyte progenitor cells would lead to a brown adipocyte phenotype...
January 11, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28088385/flavonoid-derivative-fla-cn-inhibited-adipocyte-differentiation-via-activating-ampk-and-up-regulating-microrna-27-in-3t3-l1-cells
#13
Chun-Chun Gan, Tian-Wen Ni, Yang Yu, Nan Qin, Ying Chen, Mei-Na Jin, Hong-Quan Duan
Fla-CN (3-O-[(E)-4-(4-cyanophenyl)-2-oxobut-3-en-1-yl] kaempferol) is a semi-synthesized flavonoid derivative of tiliroside which exhibited anti-diabetic effect in vivo. Our previous study revealed the role of Fla-CN in anti-obesity and anti-diabetes in vivo, but the underlying mechanism remained to be addressed. The present study aimed to investigate the mechanism of anti-adipogenesis in vitro. Fla-CN markedly inhibited intracellular lipid accumulation in a dose-dependent manner, and the inhibitory effect was mainly limited to the early stage of adipocyte differentiation in vitro...
January 11, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28088260/korean-chungtaejeon-tea-extract-attenuates-body-weight-gain-in-c57bl-6j-lep-ob-ob-mice-and-regulates-adipogenesis-and-lipolysis-in-3t3-l1-adipocytes
#14
Bhesh Raj Sharma, Dong Wook Kim, Dong Young Rhyu
OBJECTIVE: Traditional Korean Chungtaejeon (CTJ) tea is a type of fermented tea, which has received increasing attention in recent years because of its purported health benefits. The present study was designed to investigate the effect and mechanism of CTJ tea extract on body weight gain using C57BL/6J-Lep ob/ob mice and 3T3-L1 adipocytes, respectively. METHODS: The effects of CTJ on cell viability, lipid accumulation, and expression of protein and mRNA were measured in 3T3-L1 adipocytes by using 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide, oil red O staining, Western blotting, and reverse transcriptase-polymerase chain reaction analyses...
January 2017: Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28073315/metabolically-active-3-dimensional-brown-adipose-tissue-engineered-from-white-adipose-derived-stem-cells
#15
Jessica P Yang, Amy Elizabeth Anderson, Annemarie McCartney, Xavier Ory, Garret Ma, Elisa Pappalardo, Joel Bader, Jennifer Elisseeff
Brown adipose tissue (BAT) has a unique capacity to expend calories by decoupling energy expenditure from ATP production, therefore BAT could realize therapeutic potential to treat metabolic diseases such as obesity and type 2 diabetes. Recent studies have investigated markers and function of native BAT, however, successful therapies will rely on methods that supplement the small existing pool of brown adipocytes in adult humans. In this study, we engineered BAT from both human and rat adipose precursors and determined whether these ex vivo constructs could mimic in vivo tissue form and metabolic function...
January 10, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28070930/pituitary-adenoma-with-adipose-tissue-a-new-metaplastic-variant
#16
Chiara Caporalini, Anna Maria Buccoliero, Luigi Pansini, Selene Moscardi, Luca Novelli, Gianna Baroni, Lorenzo Bordi, Franco Ammannati, Gian Luigi Taddei
Pituitary adenomas are benign tumors representing approximately 15-20% of intracranial neoplasms. There have been few reports of metaplastic osseous transformation and about 60 cases of neuronal metaplasia in pituitary adenoma but adipose metaplasia has not been previously described in the English literature. Here we report a case of pituitary adenoma with metaplastic adipose tissue in a 58-year-old male patient. Histologically this case fulfilled the criteria of a non-functioning pituitary adenoma, and moreover a central area of adipose tissue, made by mature adipocytes, and many tumor cells, containing fat droplet were evident...
January 9, 2017: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/28068868/mir-26a-mediates-adipogenesis-of-amniotic-fluid-mesenchymal-stem-stromal-cells-via-pten-cyclin-e1-and-cdk6
#17
Ourania Trohatou, Dimitra Zagoura, Nikos Orfanos, Kalliopi I Pappa, Evangelos Marinos, Nicholas Anagnou, Maria G Roubelakis
Recent findings indicate that microRNAs (miRNAs) are critical for the regulatory network of adipogenesis in human mesenchymal stem/stromal cells (MSCs). Fetal MSCs derived from amniotic fluid (AF-MSCs) represent a population of multipotent stem cells characterized by a wide range of differentiation properties that can be applied in cell-based therapies. In this study, miRNA microarray analysis was performed to assess miRNA expression in terminal differentiated AF-MSCs into adipocyte-like cells (AL cells). MiR-26a was identified in high expression levels in AL cells indicating a critical role in the process of adipogenesis...
January 9, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28067590/bcl11b-gene-heterozygosity-causes-weight-loss-accompanied-by-increased-energy-consumption-but-not-defective-adipogenesis-in-mice
#18
Jun Inoue, Yusuke Ihara, Daisuke Tsukamoto, Keisuke Yasumoto, Tsutomu Hashidume, Kenya Kamimura, Shigeki Hirano, Makoto Shimizu, Ryo Kominami, Ryuichiro Sato
BCL11B is a zinc finger-type transcription factor that regulates the development of the white adipose tissue (WAT), skin, central nervous system, and immune system. BCL11B is required for proper adipocyte differentiation, and BCL11B-/- embryos at E19.5 have very low amounts of the subcutaneous WAT. Here, we demonstrated that BCL11B+/- mice have lower body weight than BCL11B+/+ mice, whereas the expression of adipogenic marker genes in the WAT was comparable between BCL11B+/+ and BCL11B+/- mice. Histological analysis indicated that BCL11B+/- mice fed a high-fat diet have much smaller white adipocytes and lipid droplets in the WAT and liver, respectively...
January 9, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28064117/differential-proteomic-and-oxidative-profiles-unveil-dysfunctional-protein-import-to-adipocyte-mitochondria-in-obesity-associated-aging-and-diabetes
#19
María Gómez-Serrano, Emilio Camafeita, Juan A López, Miguel A Rubio, Irene Bretón, Inés García-Consuegra, Eva García-Santos, Jesús Lago, Andrés Sánchez-Pernaute, Antonio Torres, Jesús Vázquez, Belén Peral
Human age-related diseases, including obesity and type 2 diabetes (T2DM), have long been associated to mitochondrial dysfunction; however, the role for adipose tissue mitochondria in these conditions remains unknown. We have tackled the impact of aging and T2DM on adipocyte mitochondria from obese patients by quantitating not only the corresponding abundance changes of proteins, but also the redox alterations undergone by Cys residues thereof. For that, we have resorted to a high-throughput proteomic approach based on isobaric labeling, liquid chromatography and mass spectrometry...
December 18, 2016: Redox Biology
https://www.readbyqxmd.com/read/28062496/adipocyte-specific-deficiency-of-nadph-oxidase-4-delays-the-onset-of-insulin-resistance-and-attenuates-adipose-tissue-inflammation-in-obesity
#20
Laura J Den Hartigh, Mohamed Omer, Leela Goodspeed, Shari Wang, Tomasz Wietecha, Kevin D O'Brien, Chang Yeop Han
OBJECTIVE: Obesity is associated with insulin resistance and adipose tissue inflammation. Reactive oxygen species (ROS) increase in adipose tissue during the development of obesity. We previously showed that in response to excess nutrients like glucose and palmitate, adipocytes generated ROS via NADPH oxidase (NOX) 4, the major adipocyte isoform, instead of using mitochondrial oxidation. However, the role of NOX4-derived ROS in the development of whole body insulin resistance, adipocyte inflammation, and recruitment of macrophages to adipose tissue during the development of obesity is unknown...
December 29, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
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