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adipocyte maturation

Shasha Wang, Yang Zhang, Qi Xu, Xiaoya Yuan, Wangcheng Dai, Xiaokun Shen, Zhixiu Wang, Guobin Chang, Zhiquan Wang, Guohong Chen
Meat quality is closely related to adipose tissues in ducks, and adipogenesis is controlled by a complex network of transcription factors tightly acting at different stages of differentiation especially in ducks. The aim of this study was to establish the preadipocyte in vitro culture system and understand the biological characteristics of expansion of duck adipocyte tissue at the cellular and molecular level. We isolated pre-adipocytes from the subcutaneous fat of three breeds of duck and differentiated them into mature adipocytes using a mixture of insulin, rosiglitazone, dexamethasone, 3-isobutyl-1-methylxanthine, and oleic acid over 0,2, 4, 6, and 8 days...
2018: PloS One
Hang Zhang, Jingjing Li, Yanan Cao, Xiang Dong, Cong Gao, Fanfan Li
BACKGROUND: Adipocytes in the tumor microenvironment may provide the metabolic fuel or signal transduction through media and other means to promote a variety of malignant proliferation and invasion, of tumor cells, but their role in lung cancer progression is still unclear. The purpose of this study was to investigate the effect of adipocytes on lung cancer cell biology. METHODS: 3T3-L1 pre-adipocytes were induced into mature adipocytes. The cell morphology was observed by microscopy and Oil Red O staining...
May 20, 2018: Zhongguo Fei Ai za Zhi, Chinese Journal of Lung Cancer
Bin Ni, Jared S Farrar, Shanshan Chen, Joseph C Lownik, Francesco S Celi
Adipocyte differentiation is a tightly regulated process which requires the sequential and organized expression of numerous genes and proteins. Phosphorylation of cytoplasmic proteins and key transcription factors represents a critical regulatory mechanism of the process leading to adipocyte maturation and modulation of associated metabolic pathways. Despite the recognition of the importance of protein phosphorylation in adipocyte biology, relatively little is known about the role of specific kinases in thermogenic (brown or beige) adipocyte differentiation and function...
May 8, 2018: Biochemical and Biophysical Research Communications
Ishan Goel, Parul Kaushik, Rama Anand
Myelolipoma(ML) is an uncommon benign mesenchymal tumor consisting of mature adipocytes and hemopoietic elements mostly found in adrenal glands. Bilateral posterior mediastinal primary myelolipoma presents extremely rarely and only 11 such occurrences have been previously described. With no definite symptoms, pathological evaluation is essential for diagnosis. Here the authors present a case of a 63-year old man diagnosed with bilateral posterior mediastinal primary myelolipoma on basis of radiological findings who underwent surgical resection via video-assisted thoracic surgery (VATS)...
May 8, 2018: Annals of Thoracic Surgery
Zongpei Song, David K C Cooper, Zhiming Cai, Lisha Mou
The pig is an important source of meat production and provides a valuable model for certain human diseases. MicroRNA (miRNA), which is noncoding RNA and regulates gene expression at the posttranscriptional level, plays a critical role in various biological processes. Studies on identification and function of mature miRNAs in multiple pig tissues are increasing, yet the literature is limited. Therefore, we reviewed current research to determine the miRNAs expressed in specific pig tissues that are involved in carcass values (including muscle and adipocytes), reproduction (including pituitary, testis, and ovary), and development of some solid organs (e...
2018: BioMed Research International
Ivan J Stojanov, Adrian Mariño-Enriquez, Nacef Bahri, Vickie Y Jo, Sook-Bin Woo
Traumatized lipomas with degenerative change may demonstrate histopathologic features that mimic atypical lipomatous tumor (ALT). Previously reported series of ALT involving the oral cavity preceded routine use of MDM2 and CDK4 immunohistochemistry. Our aim is to evaluate MDM2 and CDK4 immunohistochemical expression in adipocytic tumors arising in this site, in conjunction with the histiocytic marker PU.1, to determine whether MDM2 and CDK4 impacts classification. 17 cases originally diagnosed as ALT were retrieved and immunohistochemical studies for MDM2, CDK4 and PU...
May 10, 2018: Head and Neck Pathology
I S Stafeev, S S Michurina, N V Podkuychenko, A V Vorotnikov, M Yu Menshikov, Ye V Parfyonova
Obesity and latent inflammation in adipose tissue significantly contribute to the development of insulin resistance (IR) and type 2 diabetes. Here we studied whether the antiinflammatory interleukin-4 (IL-4) can restore insulin sensitivity in cultured 3T3-L1 adipocytes. The activity of key components of the insulin signaling cascade was assessed by immunoblotting using phospho-specific antibodies to insulin receptor substrate IRS1 (Tyr612), Akt (Thr308 and Ser473), and AS160 (Ser318) protein that regulates translocation of the GLUT4 glucose transporter to the plasma membrane...
May 2018: Biochemistry. Biokhimii︠a︡
Mariko Tanaka, Tetsuo Ushiku, Masako Ikemura, Yutaka Takazawa, Toru Igari, Michio Shimizu, Hiroshi Yamaguchi, Noriyoshi Fukushima, Kei Sakuma, Junichi Arita, Yoshihiro Sakamoto, Kiyoshi Hasegawa, Takeyuki Watadani, Yousuke Nakai, Kazuhiko Koike, Masashi Fukayama
Pancreatic masses consisting of lipomatous components clinically include lipoma, liposarcoma, lipomatous pseudohypertrophy of the pancreas, fat-containing neoplasms such as perivascular epithelioid cell tumor, and malignant neoplasm with lipoid degeneration. We present pancreatic lipomatous hamartoma, which has not been reported hitherto. A solid pancreatic mass was detected from a computed tomographic scan check-up in each of 3 cases of Japanese men. Macroscopically, well-demarcated solid lipomatous masses were detected at the uncus, body, and tail of the pancreas, respectively...
May 4, 2018: American Journal of Surgical Pathology
Hua Guan, Yali Zhang, Shoucui Gao, Liang Bai, Sihai Zhao, Xian Wu Cheng, Jianglin Fan, Enqi Liu
BACKGROUND/AIMS: Secreted frizzled-related protein 4 (SFRP4) is a member of the SFRP family that acts as soluble modulators of Wnt signaling. Given the substantial rise in obesity, depot-specific fat accumulation and its associated diseases like diabetes, it is important to understand the molecular basis of depot-specific adipocyte differentiation. In the current study, we investigated the expression of SFRP4 in both subcutaneous and visceral adipose tissue in terms of their differentiation...
April 28, 2018: Cellular Physiology and Biochemistry
Sherri L Christian, Nikitha K Pallegar, Robert J Brown, Alicia M Viloria-Petit
Background: White adipose tissue (WAT) is essential for energy storage as well as being an active endocrine organ. The secretion of adipokines by adipocytes can affect whole body metabolism, appetite, and contribute to overall health. WAT is comprised of lipid-laden mature adipocytes, as well as immune cells, endothelial cells, pre-adipocytes, and adipose-derived stem cells. In addition, the presence of extracellular matrix (ECM) proteins in WAT can actively influence adipocyte differentiation, growth, and function...
2018: PeerJ
Vian Peshdary, Gabriella Calzadilla, Anne Landry, Alexander Sorisky, Ella Atlas
BACKGROUND/OBJECTIVES: Polybrominated diphenyl ethers (PBDEs) are chemicals that were added to consumer products to reduce flammability but were deemed toxic and bioaccumulative and were phased out of commerce. Flame retardants (FRs) such as Dechlorane Plus (DP) were introduced as replacements. DP is being produced in high volumes and is detected in the environment, human milk, and human serum. Although human exposure to DP is evident, little is known about its potential effects on human health...
May 1, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
Naru Morita, Toshio Hosaka, Atsuko Kitahara, Toshitaka Murashima, Hirohisa Onuma, Yoshikazu Sumitani, Kazuto Takahashi, Toshiaki Tanaka, Takuma Kondo, Hitoshi Ishida
Objective: A growing body of evidence indicates that AMP-activated protein kinase (AMPK) contributes to not only energy metabolic homeostasis but also the inhibition of inflammatory responses. However, the underlying mechanisms remain unclear. To elucidate the role of AMPK, in this study, we observed the effects of AMPK activation on monocyte chemoattractant protein-1 (MCP-1) release in mature 3T3-L1 adipocytes. Methods: We observed signal transduction pathways regulating MCP-1, which increased in obese adipocytes, in an in vitro model of hypertrophied 3T3-L1 adipocytes preloaded with palmitate...
2018: Journal of Diabetes Research
Xin-Yan Zhang, Yan Liu, Ting He, Ting-Ting Yang, Jing Wu, Katherine Cianflone, Hui-Ling Lu
Obesity closely correlates with metaflammation and characterizes with systemic-chronic-low inflammation. This study aims to evaluate effects of C5a on the inflammatory response and insulin resistance in 3T3-L1 adipocytes. 3T3-L1 pre-adipocytes were induced to the mature 3T3-L1 adipocytes. Then, 3T3-L1 were intervened with anaphylatoxin C5a, lipopolysaccharide (LPS) and C5a + LPS, respectively. Levels of Omentin, Chemerin, Vaspin and Apelin 12 in supernatants of medium were examined using ELISA. C5L2, C5a receptor (C5aR), I kappa B (IkB), IkB kinase (IKK), insulin receptor substrate 1 (IRS-1), IRS-2, PI3 K, p-PI3 K and β-actin were examined using RT-PCR and western blot assay, respectively...
April 24, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Ernst Lengyel, Liza Makowski, John DiGiovanni, Mikhail G Kolonin
Obesity has been linked to the increased risk and aggressiveness of many types of carcinoma. A state of chronic inflammation in adipose tissue (AT), resulting in genotoxic stress, may contribute to carcinogenesis and cancer initiation. Evidence that AT plays a role in cancer aggressiveness is solid and mounting. During cancer progression, tumor cells engage in a metabolic symbiosis with adjacent AT. Mature adipocytes provide adipokines and lipids to cancer cells, while stromal and immune cells from AT infiltrate carcinomas and locally secrete paracrine factors within the tumor microenvironment...
May 2018: Trends in Cancer
Ana Cecilia Ho-Palma, Floriana Rotondo, María Del Mar Romero, José Antonio Fernández-López, Xavier Remesar, Marià Alemany
White adipose tissue can metabolize large amounts of glucose to glycerol and lactate. We quantitatively traced glucose label to lactate, glycerol and fats in primary cultures of mature rat epididymal adipocytes. Cells were incubated with 7/14 mM 14 C-glucose for 24/48 h. Medium metabolites and the label in them and in cells' components were measured. Gene expression analysis was done using parallel incubations. Glucose concentration did not affect lactate efflux and most parameters. Glycerol efflux increased after 24 h, coinciding with arrested lipogenesis...
April 30, 2018: Adipocyte
David Ferland-McCollough, Davide Masseli, Gaia Spinetti, Maria Sambataro, Niall Sullivan, Ashley Blom, Paolo Madeddu
Fat accumulates in bone marrow (BM) of diabetic patients. Here, we investigated the mechanisms and consequences of this phenomenon. BM-mesenchymal stromal cells (BM-MSCs) from type-2 diabetic (T2D) patients constitutively express adipogenic markers and robustly differentiate into adipocytes (ADs) upon in-vitro induction as compared with BM-MSCs from non-diabetic subjects. Moreover, T2D BM adipocytes paracrinally stimulate a transcriptional adipogenic program in BM-MSCs. Antagonism of monocyte chemoattractant protein (MCP-1), a chemokine pivotally expressed in T2D BM-ADs, prevented the TD2 BM-AD secretome from converting BM-MSCs into ADs...
April 27, 2018: Diabetes
S Wei, Y Zheng, M Zhang, H Zheng, P Yan
The objective of this paper was to evaluate in vitro effect of grape seed procyanidin extract (GSPE) on differentiation, proliferation, and lipolysis of porcine adipocytes, providing a molecular basis for the use of GSPE in pig fat regulation. Primary preadipocytes isolated from subcutaneous adipose tissue of pigs were used as the in vitro cell model. Treatment of GSPE repressed preadipocyte differentiation, as evidenced by reduced lipid accumulation, decreased mRNA expressions of peroxisome proliferator-activated receptor gamma (PPARγ) and fatty acid binding protein 4 (FABP4) , as well as enhanced expressions of preadipocyte factor-1 (Pref-1)...
April 26, 2018: Journal of Animal Science
Johan W E Jocken, Dorien Reijnders, Emanuel E Canfora, Mark V Boekschoten, Joghum Plat, Gijs H Goossens, Ellen E Blaak
The intestinal microbiota may contribute to the development of obesity by affecting host lipid metabolism and insulin sensitivity. To investigate the effects of microbiota manipulation on ex vivo basal and β-adrenergically-stimulated lipolysis in human adipocytes, 36 obese men were randomized to amoxicillin (broad-spectrum antibiotic), vancomycin (narrow-spectrum antibiotic) or placebo treatment (7 d, 1500 mg/d). Before and after treatment, ex vivo adipose tissue lipolysis was assessed under basal conditions and during stimulation with the non-selective β-agonist isoprenaline using freshly isolated mature adipocytes...
April 25, 2018: Adipocyte
Xiaocui Du, Qin Huang, Yun Guan, Ming Lv, Xiaofang He, Chongye Fang, Xuanjun Wang, Jun Sheng
The synthesis and metabolism of fatty acids in an organism is related to many biological processes and is involved in several diseases. The effects of caffeine on fatty acid synthesis and fat storage in Caenorhabditis elegans and mice were studied. After 6 h of food deprivation, adult C. elegans were treated with 0.1 mg/mL caffeine for 24 h. Quantitative reverse-transcription polymerase chain reaction showed that, among all the genes involved in fat accumulation, the mRNA expression of fat-5 in caffeine-treated C...
2018: Frontiers in Pharmacology
O Tsave, C Gabriel, M Kafantari, M Yavropoulou, J G Yovos, C P Raptopoulou, V Psycharis, A Terzis, C Mateescu, A Salifoglou
In an attempt to understand the aqueous interactions of Cr(III) with low-molecular mass physiological ligands and examine its role as an adipogenic metallodrug agent in Diabetes mellitus II, the pH-specific synthesis in the binary-ternary Cr(III)-(HA = hydroxycarboxylic acid)-(N,N)-aromatic chelator (AC) (HA = 2-hydroxyethyl iminodiacetic acid/heidaH2 , quinic acid; AC = 1,10-phenanthroline/phen) systems was pursued, leading to four new crystalline compounds. All materials were characterized by elemental analysis, UV-Visible, FT-IR, and ESI-MS spectroscopy, cyclic voltammetry, and X-Ray crystallography...
February 10, 2018: Journal of Inorganic Biochemistry
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