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https://www.readbyqxmd.com/read/28938790/factors-affecting-adipose-tissue-development-in-chickens-a-review
#1
Guoqing Wang, Woo Kyun Kim, Mark A Cline, Elizabeth R Gilbert
The intense genetic selection for rapid growth in broilers has resulted in an increase in voluntary feed intake and growth rate, accompanied by increased fat deposition in adipose tissue depots throughout the body. Adipose tissue expansion is a result of the formation of adipocytes (several processes collectively referred to as adipogenesis) and cellular accumulation of triacylglycerols inside lipid droplets. In mammals, different anatomical depots are metabolically distinct. The molecular and cellular mechanisms underlying adipose tissue development have been characterized in mammalian models, whereas information in avian species is scarce...
October 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28938471/low-vitamin-b12-in-pregnancy-is-associated-with-adipose-derived-circulating-mirs-targeting-ppar%C3%AE-and-insulin-resistance
#2
Antonysunil Adaikalakoteswari, Manu Vatish, Mohammad Tauqeer Alam, Sascha Ott, Sudhesh Kumar, Ponnusamy Saravanan
Context: Low vitamin B12 (B12) during pregnancy is associated with higher maternal obesity, insulin resistance(IR) and gestational diabetes(GDM). B12 is a key co-factor in 1-carbon metabolism. Objective: We hypothesize that B12 plays a role in epigenetic regulation by altering circulating miRNAs(miRs) during adipocyte differentiation and results in an adverse metabolic phenotype. Design, settings and main-outcome measure: Human pre-adipocyte cell-line(Chub-S7) were differentiated in various B12 concentrations: Control(500nM), LowB12(0...
September 5, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28938450/sex-specific-modulation-of-fetal-adipogenesis-by-gestational-bisphenol-a-and-bisphenol-s-exposure
#3
Yong Pu, Jeremy Gingrich, Juan P Steibel, Almudena Veiga-Lopez
The endocrine disrupting chemical bisphenol A (BPA) increases adipose tissue mass in vivo and promotes adipogenesis in vitro. However, mechanisms explaining BPA's obesogenic effect remain unknown. We investigated the effects of gestational BPA and its analogue, bisphenol S (BPS), exposure on the adipogenic differentiation ability of fetal preadipocytes and the role of endoplasmic reticulum stress in regulating this process. Pregnant sheep (n=7-8/group) mated to the same male were exposed to BPA or BPS from days 30 to 100 of gestation, and pregnancies terminated 20 days later...
September 14, 2017: Endocrinology
https://www.readbyqxmd.com/read/28938423/igfbp4-is-required-for-adipogenesis-and-influences-the-distribution-of-adipose-depots
#4
David E Maridas, Victoria E DeMambro, Phuong T Le, Subburaman Mohan, Clifford J Rosen
Insulin-like Growth Factor I (IGF-I) induces adipogenesis in vitro. IGF Binding Protein 4 (IGFBP4) is highly expressed in adipocytes and osteoblasts and is inhibitory of IGFs in vitro. We previously reported that Igfbp4 null mice (Igfbp4-/-) had decreased fat proportions at 8 and 16 weeks of age. However, the mechanism leading to the reduced adiposity remains unknown. The purpose of this study was to elucidate how IGFBP4 mediates adipose tissue development in vivo. Our results showed that inguinal (iWAT) and gonadal (gWAT) white adipose tissues from Igfbp4-/- mice had decreased weights and Pparγ expression...
July 27, 2017: Endocrinology
https://www.readbyqxmd.com/read/28938397/regulation-of-orbital-fibrosis-and-adipogenesis-by-pathogenic-th17-cells-in-graves-orbitopathy
#5
Sijie Fang, Yazhuo Huang, Sisi Zhong, Yangyang Li, Yidan Zhang, Yinwei Li, Jing Sun, Xingtong Liu, Yang Wang, Shuo Zhang, Tianle Xu, Xiaodong Sun, Ping Gu, Dan Li, Huifang Zhou, Bin Li, Xianqun Fan
Context: Th17 cells are correlated with many human autoimmune disorders including Graves' disease, and may play key roles in the pathogenesis of Graves' orbitopathy (GO). Objective: To study the phenotype of Th17 cells in patients with GO and healthy subjects, investigate the fibrosis and adipogenesis in orbital fibroblasts (OFs) modulated by IL-17A, and determine the interaction between Th17 cells and OFs. Design/Setting/Participants: Blood samples and orbital tissues from GO patients and healthy controls were collected...
August 16, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28934090/adipogenic-effects-and-gene-expression-profiling-of-firemaster%C3%A2-550-components-in-human-primary-preadipocytes
#6
Emily W Y Tung, Vian Peshdary, Remi Gagné, Andrea Rowan-Carroll, Carole L Yauk, Adéle Boudreau, Ella Atlas
BACKGROUND: Exposure to flame retardants has been associated with negative health outcomes including metabolic effects. As polybrominated diphenyl ether flame retardants were pulled from commerce, human exposure to new flame retardants such as Firemaster® 550 (FM550) has increased. Although previous studies in murine systems have shown that FM550 and its main components increase adipogenesis, the effects of FM550 in human models have not been elucidated. OBJECTIVES: The objectives of this study were to determine if FM550 and its components are active in human preadipocytes, and to further investigate their mode of action...
September 14, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28931847/excessive-activation-of-tlr4-nf-%C3%AE%C2%BAb-interactively-suppresses-the-canonical-wnt-%C3%AE-catenin-pathway-and-induces-sanfh-in-sd-rats
#7
Junpeng Pei, Lihong Fan, Kai Nan, Jia Li, Zhibin Shi, Xiaoqian Dang, Kunzheng Wang
Nuclear factor-kappa B (NF-κB) interactively affects the Wnt/β-catenin pathway and is closely related to different diseases. However, such crosstalk effect in steroid-associated necrosis of femoral head (SANFH) has not been fully explored and evaluated. In this study, early-stage SANFH was induced by two doses of lipopolysaccharide (LPS, 2 mg/kg/day) and three doses of methylprednisolone (MPS, 40 mg/kg/day). LPS and pyrrolidine dithiocarbamate (PDTC) were administered to activate the TLR4/NF-κB pathway and selectively block the activation of NF-κB, respectively...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28931598/coordinated-increase-of-nuclear-tension-and-lamin-a-with-matrix-stiffness-out-competes-lamin-b-receptor-which-favors-soft-tissue-phenotypes
#8
Amnon Buxboim, Jerome Irianto, Joe Swift, Avathamsa Athirasala, Jae-Won Shin, Florian Rehfeldt, Dennis E Discher
Matrix stiffness that is sensed by a cell or measured by a purely physical probe reflects the intrinsic elasticity of the matrix and also how thick or thin the matrix is. Here, mesenchymal stem cells (MSCs) and their nuclei spread in response to thickness-corrected matrix micro-elasticity, with increases in nuclear tension and nuclear stiffness resulting from increases in myosin-II and lamin-A,C. Linearity between the widely varying projected area of a cell and its nucleus across many matrices, timescales, and myosin-II activity levels indicates a constant ratio of nucleus-to-cell volume, despite the differentiation potential of MSCs...
September 20, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28930673/pexrap-inhibits-prdm16-mediated-thermogenic-gene-expression
#9
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/28930432/injectable-stem-cell-laden-open-porous-microgels-that-favour-adipogenesis-in-vitro-and-in-vivo-evaluation
#10
Pengfei Xia, Kunxi Zhang, Yan Gong, Guifei Li, Shifeng Yan, Jingbo Yin
Microgels, with large surface area per volume, show great advantages in adipose tissue engineering due to their injectability and similarity with natural extracellular matrix. However, to date, no studies have tried applying microgels to adipose tissue regeneration. Herein, based on double bonded poly-(L-glutamic acid)-g-2-Hydroxyethyl methacrylate (PLGA-g-HEMA) and maleic anhydride-modified chitosan (MCS), an open porous microgel with high hydrophilicity and great injectability is successfully prepared (microgels diameter of 200-300 μm, pore diameter of 38 μm, and porosity of 88...
September 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28928090/investigation-of-antidiabetic-potential-of-phyllanthus-niruri-l-using-assays-for-%C3%AE-glucosidase-muscle-glucose-transport-liver-glucose-production-and-adipogenesis
#11
Maliheh Najari Beidokhti, Mia Vesterholm Andersen, Hoda M Eid, Mayra Luz Sanchez Villavicencio, Dan Staerk, Pierre S Haddad, Anna K Jäger
Phyllanthus niruri is used in herbal medicine for treatment of diabetes. The objective of this study was to investigate the antidiabetic potential of P. niruri, using assays for α-glucosidase, muscle glucose transport, liver glucose production and adipogenesis. α-Glucosidase inhibitory activity was performed on aqueous and ethanolic extract of aerial parts of P. niruri. The aqueous and ethanolic extract of P. niruri showed α-glucosidase inhibitory activity with IC50 values of 3.7 ± 1.1 and 6.3 ± 4...
September 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28927883/retinol-saturase-modulates-lipid-metabolism-and-the-production-of-reactive-oxygen-species
#12
Xiao-Yan Pang, Suya Wang, Michael J Jurczak, Gerald I Shulman, Alexander R Moise
Retinol saturase (RetSat) catalyzes the saturation of double bonds of all-trans-retinol leading to the production of dihydroretinoid metabolites. Beside its role in retinoid metabolism, there is evidence that RetSat modulates the cellular response to oxidative stress and plays critical roles in adipogenesis and the accumulation of lipids. Here, we explore the relationship between RetSat, lipid metabolism and oxidative stress using in vitro and in vivo models with altered expression of RetSat. Our results reveal that RetSat is a potent modulator of the cellular response to oxidative stress and the generation of reactive oxygen species (ROS)...
September 16, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28926111/regulating-osteogenesis-and-adipogenesis-in-adipose-derived-stem-cells-by-controlling-underlying-substrate-stiffness
#13
Tao Zhang, Shiyu Lin, Xiaoru Shao, Sirong Shi, Qi Zhang, Changyue Xue, Yunfeng Lin, Bofeng Zhu, Xiaoxiao Cai
Cells reside in a complex microenvironment (niche) in which the biochemical and biophysical properties of the extracellular matrix profoundly affect cell behavior. Extracellular stiffness, one important bio-mechanical characteristic of the cell niche, is important in regulating cell proliferation, migration, and lineage specification. However, the mechanism by which mechanical signals guide osteogenic and adipogenic commitment of stem cells remains difficult to dissect. To explore this question, we generated a range of polydimethylsiloxane-based matrices with differing degrees of stiffness that mimicked the stiffness seen in natural tissues and examined adipose stem cell morphology, spreading, vinculin expression and differentiation along the osteogenic and adipogenic pathways...
September 19, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28923965/sirt7-promotes-adipogenesis-in-the-mouse-by-inhibiting-autocatalytic-activation-of-sirt1
#14
Jian Fang, Alessandro Ianni, Christian Smolka, Olesya Vakhrusheva, Hendrik Nolte, Marcus Krüger, Astrid Wietelmann, Nicolas G Simonet, Juan M Adrian-Segarra, Alejandro Vaquero, Thomas Braun, Eva Bober
Sirtuins (Sirt1-Sirt7) are NAD(+)-dependent protein deacetylases/ADP ribosyltransferases, which play decisive roles in chromatin silencing, cell cycle regulation, cellular differentiation, and metabolism. Different sirtuins control similar cellular processes, suggesting a coordinated mode of action but information about potential cross-regulatory interactions within the sirtuin family is still limited. Here, we demonstrate that Sirt1 requires autodeacetylation to efficiently deacetylate targets such as p53, H3K9, and H4K16...
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28921681/anti-obesity-activity-of-saringosterol-isolated-from-sargassum-muticum-yendo-fensholt-extract-in-3t3-l1-cells
#15
Jung A Lee, Young-Rak Cho, Seong Su Hong, Eun-Kyung Ahn
Saringosterol, a steroid isolated from Sargassum muticum, a brown edible alga widely distributed on the seashores of southern and eastern Korea, has been shown to exhibit anti-obesity effect. In this study, we investigated the anti-obesity activity of saringosterol through various experiments. The inhibitory effect of saringosterol on adipogenesis was evaluated via Oil Red O staining in 3T3-L1 preadipocytes. After confirming that saringosterol is not cytotoxic to these cells by using the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide assay, the effect of saringosterol on the expression of various adipogenesis-related genes was analyzed via quantitative real-time polymerase chain reaction and western blotting...
September 18, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28921615/plasticizer-di-2-ethylhexyl-phthalate-interferes-with-osteoblastogenesis-and-adipogenesis-in-a-mouse-model
#16
Chen-Yuan Chiu, Shih-Chun Sun, Chih-Kang Chiang, Ching-Chia Wang, Ding-Cheng Chan, Huang-Jen Chen, Shing-Hwa Liu, Rong-Sen Yang
Plasticizer di(2-ethylhexyl)phthalate (DEHP) can leach from medical devices such as blood storage bags and the tubing. Recently, epidemiological studies showed that phthalate metabolites levels in the urine are associated with low bone mineral density (BMD) in older women. The detailed effect and mechanism of DEHP on osteoblastogenesis and adipogenesis and bone loss remain to be clarified. Here, we investigated the effect and mechanism of DEHP and its active metabolite mono(2 -ethylhexyl)phthalate (MEHP) on osteoblastogenesis and adipogenesis...
September 16, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28920418/myogenic-satellite-cells-differentiation-with-linolenic-and-retinoic-and-thiazolidenediones-from-prepubertal-korean-black-goat
#17
Sugathan Subi, Sungjin Lee, Supriya Shiwani, Naresh Kumar Singh
Objective: Myogenic satellite cells were isolated from semitendinosus muscle of prepubertal Korean black goat to observe the differential effect of linolenic and retinoic acid in thepresence of thiazolidinediones and also to observe the production insulin sensitive preadipocyte. Methods: Cells were characterized for its stemness with CD 34, CD 13, CD 106, CD44, Vimentin surface markers using flow cytometry. Cells characterized themselves to possess significant (p<0...
September 18, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28919112/disuse-atrophy-accompanied-by-intramuscular-ectopic-adipogenesis-in-vastus-medialis-muscle-of-advanced-osteoarthritis-patients
#18
Madoka Ikemoto-Uezumi, Yasumoto Matsui, Masaki Hasegawa, Remi Fujita, Yasuhide Kanayama, Akiyoshi Uezumi, Tsuyoshi Watanabe, Atsushi Harada, A Robin Poole, Naohiro Hashimoto
Muscle dysfunction is the most important modifiable mediating factor in primary osteoarthritis because properly contracting muscles are a key absorber of forces acting on a joint. However, the pathological features of disuse muscle atrophy in osteoarthritis patients have been little studied. Vastus medialis muscles of fourteen female patients with osteoarthritis in the age range 69 to 86 years, largely immobile for one or more years, were obtained during arthroplastic surgery and analyzed histologically. These were compared to female patients without arthritis, two with patellar fracture, and two with patellar subluxation...
September 14, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28919111/promethazine-hydrochloride-inhibits-ectopic-fat-cell-formation-in-skeletal-muscle
#19
Takehiro Kasai, Masashi Nakatani, Naoki Ishiguro, Kinji Ohno, Naoki Yamamoto, Mitsuhiro Morita, Harumoto Yamada, Kunihiro Tsuchida, Akiyoshi Uezumi
Fatty degeneration of skeletal muscle leads to muscle weakness and loss of function. Preventing fatty degeneration in skeletal muscle is important, but no drug has been used clinically. In this study, we performed drug repositioning using human platelet-derived growth factor receptor α (PDGFRα)-positive mesenchymal progenitors that have been proved to be an origin of ectopic adipocytes in skeletal muscle. We found that promethazine hydrochloride (PH) inhibits adipogenesis in a dose-dependent manner without cell toxicity...
September 14, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28916720/glucose-availability-controls-adipogenesis-in-mouse-3t3-l1-adipocytes-via-upregulation-of-nicotinamide-metabolism
#20
Robert M Jackson, Beth A Griesel, Jami M Gurley, Luke I Szweda, Ann Louise Olson
Expansion of adipose tissue in response to a positive energy balance underlies obesity and occurs through both hypertrophy of existing cells and increased differentiation of adipocyte precursors (hyperplasia). To better understand the nutrient signals that promote adipocyte differentiation, we investigated the role of glucose availability in regulating adipocyte differentiation and maturation. 3T3-L1 preadipocytes were grown and differentiated in media containing a standard differentiation hormone cocktail and either 4 or 25mM glucose...
September 15, 2017: Journal of Biological Chemistry
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