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adipocyte maturation

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https://www.readbyqxmd.com/read/29352391/functional-recovery-by-application-of-human-dedifferentiated-fat-cells-on-cerebral-infarction-mice-model
#1
Tomoki Kakudo, Naotaka Kishimoto, Tomohiro Matsuyama, Yoshihiro Momota
Elderly people whose daily activities have declined due to a cerebrovascular disorder may suffer from dysphagia and may find oral hygiene difficult. Therefore, it is important to establish an effective therapy for the underlying cerebrovascular disorder. Dedifferentiated fat cells (DFAT) were obtained from mature adipocytes isolated from human buccal adipose pads in a ceiling culture. DFAT expressed the neural markers Nestin and SOX2. Flow cytometric analysis revealed that the cells had properties similar to mesenchymal stem cells...
January 19, 2018: Cytotechnology
https://www.readbyqxmd.com/read/29350777/the-pathology-of-lumbosacral-lipomas-macroscopic-and-microscopic-disparity-have-implications-for-embryogenesis-and-mode-of-clinical-deterioration
#2
Victoria Jones, Victoria Wykes, Nicki Cohen, Dominic Thompson, Thomas S Jacques
AIMS: Lumbosacral lipomas (LSL) are congenital disorders of the terminal spinal cord region that have the potential to cause significant spinal cord dysfunction in children. They are of unknown embryogenesis with variable clinical presentation and natural history. It is unclear whether the spinal cord dysfunction reflects a primary developmental dysplasia or whether it occurs secondarily to mechanical traction (spinal cord tethering) with growth. Whilst different anatomical subtypes are recognised and classified according to radiological criteria, these subtypes correlate poorly with clinical prognosis...
January 19, 2018: Histopathology
https://www.readbyqxmd.com/read/29346772/peroxisome-proliferator-activated-receptor-gamma-controls-mature-brown-adipocyte-inducibility-through-glycerol-kinase
#3
David Lasar, Matthias Rosenwald, Elke Kiehlmann, Miroslav Balaz, Bettina Tall, Lennart Opitz, Martin E Lidell, Nicola Zamboni, Petra Krznar, Wenfei Sun, Lukas Varga, Patrik Stefanicka, Jozef Ukropec, Pirjo Nuutila, Kirsi Virtanen, Ez-Zoubir Amri, Sven Enerbäck, Walter Wahli, Christian Wolfrum
Peroxisome proliferator-activated receptors (PPARs) have been suggested as the master regulators of adipose tissue formation. However, their role in regulating brown fat functionality has not been resolved. To address this question, we generated mice with inducible brown fat-specific deletions of PPARα, β/δ, and γ, respectively. We found that both PPARα and β/δδ are dispensable for brown fat function. In contrast, we could show that ablation of PPARγ in vitro and in vivo led to a reduced thermogenic capacity accompanied by a loss of inducibility by β-adrenergic signaling, as well as a shift from oxidative fatty acid metabolism to glucose utilization...
January 16, 2018: Cell Reports
https://www.readbyqxmd.com/read/29345311/calcium-sensing-receptor-activates-the-nlrp3-inflammasome-in-ls14-preadipocytes-mediated-by-erk1-2-signaling
#4
Amanda D'Espessailles, Yuly A Mora, Cecilia Fuentes, Mariana Cifuentes
The study of the mechanisms that trigger inflammation in adipose tissue is key to understanding and preventing the cardiometabolic consequences of obesity. We have proposed a model where activation of the G protein-coupled calcium sensing receptor (CaSR) leads to inflammation and dysfunction in adipose cells. Upon activation, CaSR can mediate the expression and secretion of proinflammatory factors in human preadipocytes, adipocytes and adipose tissue explants. One possible pathway involved in CaSR-induced inflammation is the activation of the NLR family, pyrin domain-containing 3 (NLRP3) inflammasome, that promotes maturation and secretion of interleukin (IL)-1β...
January 18, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29344656/liraglutide-suppresses-proliferation-and-induces-adipogenic-differentiation-of-3t3-l1-cells-via-the-hippo-yap-signaling-pathway
#5
Yongmei Li, Jianying Du, Endong Zhu, Juanjuan Zhang, Jie Han, Wei Zhao, Bei Sun, Derun Tian
Liraglutide, as a glucagon-like peptide‑1 analogue, is used to treat type 2 diabetes mellitus and obesity. Previous findings have demonstrated the effects of liraglutide on adipogenesis; however, the underlying mechanism involved in this process remains to be elucidated. In the present study, to certify the effect of liraglutide on adipogenesis and explore the possible underlying mechanism involved in this process, preadipocyte 3T3‑L1 cells were cultured in adipocyte‑inducing medium and treated with liraglutide...
January 16, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29339400/intact-glucose-uptake-despite-deteriorating-signaling-in-adipocytes-with-high-fat-feeding
#6
Björn Hansson, Sebastian Wasserstrom, Björn Moren, Vipul Periwal, Petter Vikman, Sam Cushman, Olga Göransson, Petter Storm, Karin Stenkula
To capture immediate cellular changes during diet-induced expansion of adipocyte cell volume and number, we characterized mature adipocytes during a short-term high-fat diet (HFD) intervention. Male C57BL6/J mice were fed chow diet, and then switched to HFD for 2, 4, 6 or 14 days. Systemic glucose clearance was assessed by glucose tolerance test. Adipose tissue was dissected for RNA-seq and cell size distribution analysis using coulter counting. Insulin response in isolated adipocytes was monitored by glucose uptake assay and western blotting, and confocal microscopy was used to assess autophagic activity...
January 16, 2018: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29334574/improved-long-term-volume-retention-of-svf-gel-grafting-with-enhanced-angiogenesis-and-adipogenesis
#7
Yuteng Zhang, Junrong Cai, Tao Zhou, Yao Yao, Ziqing Dong, Feng Lu
BACKGROUND: The apoptosis of mature adipocytes after fat grafting can result in chronic inflammation, absorption, and fibrosis, leading to unpredictable outcomes. Selective elimination of mature adipocytes may result in better outcomes and a different underlying retention mode. We previously developed a mature-adipocyte-free product, SVF-gel, derived from lipoaspirate, which eliminates adipocytes while preserving the stromal vascular fraction. This study investigated the retention and regeneration mode of SVF-gel grafting...
January 10, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29323267/scaffold-free-generation-of-uniform-adipose-spheroids-for-metabolism-research-and-drug-discovery
#8
Aloysius J Klingelhutz, Francoise A Gourronc, Anna Chaly, David A Wadkins, Anthony J Burand, Kathleen R Markan, Sharon O Idiga, Meng Wu, Matthew J Potthoff, James A Ankrum
Adipose tissue dysfunction is critical to the development of type II diabetes and other metabolic diseases. While monolayer cell culture has been useful for studying fat biology, 2D culture often does not reflect the complexity of fat tissue. Animal models are also problematic in that they are expensive, time consuming, and may not completely recapitulate human biology because of species variation. To address these problems, we have developed a scaffold-free method to generate 3D adipose spheroids from primary or immortal human or mouse pre-adipocytes...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321243/adipose-depot-specific-effects-of-ileal-interposition-surgery-in-ucd-t2d-rats-unexpected-implications-for-obesity-and-diabetes
#9
Connie Hung, Casey Bronec, Eleonora Napoli, James Graham, Kimber L Stanhope, Ilaria Marsilio, Maria Cecilia Giron, Peter J Havel, Cecilia Giulivi
Ileal interposition (IT) surgery delays the onset of diabetes in a rat model of type-2 diabetes (UCD-T2DM). Here, to gain a deeper understanding of the molecular events underlying the effects of IT surgery, we examined the changes in the proteome of 4 white adipose depots (retroperitoneal, mesenteric, inguinal, and epididymal), and plasma free fatty acid profile in pre-diabetic rats 1.5 months following IT or sham surgery. The IT-mediated changes were exerted mainly in mesenteric fat, and spanned from delayed adipocyte maturation to a neuroendocrine remodeling...
January 10, 2018: Biochemical Journal
https://www.readbyqxmd.com/read/29317436/the-diabetes-gene-and-wnt-pathway-effector-tcf7l2-regulates-adipocyte-development-and-function
#10
Xi Chen, Ayala Iriscilla, Chris Shannon, Marcel Fourcaudot, Nikhil K Acharya, Christopher P Jenkinson, Sami Heikkinen, Luke Norton
The gene encoding for transcription factor 7-like 2 (TCF7L2) is the strongest type 2 diabetes (T2DM) candidate gene discovered to date. The TCF7L2 protein is a key transcriptional effector of the Wnt/β-catenin signaling pathway, which is an important developmental pathway that negatively regulates adipogenesis. However, the precise role that TCF7L2 plays in the development and function of adipocytes remains largely unknown. Using a combination of in vitro approaches, we first show that TCF7L2 protein is increased during adipogenesis in 3T3-L1 cells and primary adipocyte stem cells (ASC), and that TCF7L2 expression is required for the regulation of Wnt signaling during adipogenesis...
January 9, 2018: Diabetes
https://www.readbyqxmd.com/read/29298881/multiple-intracellular-signaling-pathways-orchestrate-adipocytic-differentiation-of-human-bone-marrow-stromal-stem-cells
#11
Dalia Ali, Sarah Abuelreich, Nora Alkeraishan, Najla Bin Shwish, Rimi Hamam, Moustapha Kassem, Musaad Alfayez, Abdullah Aldahmash, Nehad M Alajez
Bone marrow adipocyte formation plays a role in bone homeostasis and whole body energy metabolism. However, the transcriptional landscape and signaling pathways associated with adipocyte lineage commitment and maturation are not fully delineated. Thus, we performed global gene expression profiling during adipocyte differentiation of human bone marrow stromal (mesenchymal) stem cells (hMSCs) and identified 2,589 upregulated and 2,583 down regulated mRNA transcripts. Pathway analysis on the upregulated gene list untraveled enrichment in multiple signaling pathways including insulin receptor signaling, focal Adhesion, metapathway  biotransformation, a number of metabolic pathways e...
January 3, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29288588/il-1%C3%AE-inhibits-proliferation-and-adipogenic-differentiation-of-human-adipose-derived-mesenchymal-stem-cells-through-nf-%C3%AE%C2%BAb-and-erk1-2-mediated-proinflammatory-cytokines
#12
Xuerong Sun, Tangbin Zou, Changqing Zuo, Mingmeng Zhang, Benyan Shi, Zhiwen Jiang, Hongjing Cui, Xiaoxin Liao, Xiaoyi Li, Yuelian Tang, Yusheng Liu, Xinguang Liu
Dysfunctional adipogenesis such as subcutaneous lipoatrophy is closely related to insulin resistance and metabolic disorders. Although the expression or release of the cytokine interleukin-1α(L-1α) is known to increase in adipose tissue in response to cell death, cell senescence, aging, or solar radiation, the regulatory role of IL-1α in adipogenesis has not been sufficiently investigated. To investigate the problem, we explored the effect of IL-1α on the proliferation and adipogenic differentiation of human adipose-derived mesenchymal stem cells (ADSCs) using cell counting, alamarBlue assay, oil O staining, Western blot, among others...
December 30, 2017: Cell Biology International
https://www.readbyqxmd.com/read/29283284/endothelial-dysfunction-occurs-independently-of-adipose-tissue-inflammation-and-insulin-resistance-in-ovariectomized-yucatan-miniature-swine
#13
Thomas J Jurrissen, T Dylan Olver, Nathan C Winn, Zachary I Grunewald, Gabriela S Lin, Jessica A Hiemstra, Jenna C Edwards, Michelle L Gastecki, Rebecca J Welly, Craig A Emter, Victoria J Vieira-Potter, Jaume Padilla
In rodents, experimentally-induced ovarian hormone deficiency increases adiposity and adipose tissue (AT) inflammation, which is thought to contribute to insulin resistance and increased cardiovascular disease risk. However, whether this occurs in a translationally-relevant large animal model remains unknown. Herein, we tested the hypothesis that ovariectomy would promote visceral and perivascular AT (PVAT) inflammation, as well as subsequent insulin resistance and peripheral vascular dysfunction in female swine...
December 28, 2017: Adipocyte
https://www.readbyqxmd.com/read/29279571/transplantation-of-mature-adipocyte-derived-dedifferentiated-fat-cells-into-three-wall-defects-in-the-rat-periodontium-induces-tissue-regeneration
#14
Daigo Suzuki, Daisuke Akita, Niina Tsurumachi, Koichiro Kano, Katsuyuki Yamanaka, Tadashi Kaneko, Eisuke Kawano, Shinya Iguchi, Taku Toriumi, Yoshinori Arai, Taro Matsumoto, Shuichi Sato, Masaki Honda
The transplantation of dedifferentiated fat (DFAT) cells in combination with poly(d,l-lactic-co-glycolic acid) (PLGA) scaffolds has previously been proven as an effective approach in promoting periodontal tissue regeneration in a rat fenestration defect model. The aim of this study was to assess the regenerative potential of DFAT cells in a rat model of three-wall periodontal bone defect. Three-wall bone defects were created bilaterally on the mesial side of rat maxillary first molars and were either left untreated or treated by implantation of PLGA scaffolds with DFAT cells or PLGA alone...
2017: Journal of Oral Science
https://www.readbyqxmd.com/read/29275363/consistent-involvement-of-chromosome-13-in-angiolipoma
#15
Ioannis Panagopoulos, Ludmila Gorunova, Kristin Andersen, Ingvild Lobmaier, Bodil Bjerkehagen, Sverre Heim
BACKGROUND/AIM: Angiolipoma is a rare benign soft tissue tumor composed of mature adipocytes and blood vessels. Genetic information on angiolipomas is scarce. With the single exception of one tumor which carried a t(X;2)(p22;p12), all angiolipomas hitherto investigated cytogenetically had normal karyotypes. MATERIALS AND METHODS: G-banding chromosome analysis was performed on three short-term cultured angiolipomas. Fluorescence in situ hybridization (FISH) analysis using a commercially available RB1 deletion probe was also done...
January 2018: Cancer Genomics & Proteomics
https://www.readbyqxmd.com/read/29250032/involvement-of-amylin-and-leptin-in-the-development-of-projections-from-the-area-postrema-to-the-nucleus-of-the-solitary-tract
#16
Kathrin Abegg, Andreas Hermann, Christina N Boyle, Sebastien G Bouret, Thomas A Lutz, Thomas Riediger
The area postrema (AP) and the nucleus of the solitary tract (NTS) are important hindbrain centers involved in the control of energy homeostasis. The AP mediates the anorectic action and the inhibitory effect on gastric emptying induced by the pancreatic hormone amylin. Amylin's target cells in the AP project to the NTS, an integrative relay center for enteroceptive signals. Perinatal hormonal and metabolic factors influence brain development. A postnatal surge of the adipocyte-derived hormone leptin represents a developmental signal for the maturation of projections between hypothalamic nuclei controlling energy balance...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29249357/il-10-signaling-remodels-adipose-chromatin-architecture-to-limit-thermogenesis-and-energy-expenditure
#17
Prashant Rajbhandari, Brandon J Thomas, An-Chieh Feng, Cynthia Hong, Jiexin Wang, Laurent Vergnes, Tamer Sallam, Bo Wang, Jaspreet Sandhu, Marcus M Seldin, Aldons J Lusis, Loren G Fong, Melanie Katz, Richard Lee, Stephen G Young, Karen Reue, Stephen T Smale, Peter Tontonoz
Signaling pathways that promote adipose tissue thermogenesis are well characterized, but the limiters of energy expenditure are largely unknown. Here, we show that ablation of the anti-inflammatory cytokine IL-10 improves insulin sensitivity, protects against diet-induced obesity, and elicits the browning of white adipose tissue. Mechanistic studies define bone marrow cells as the source of the IL-10 signal and adipocytes as the target cell type mediating these effects. IL-10 receptor alpha is highly enriched in mature adipocytes and is induced in response to differentiation, obesity, and aging...
December 8, 2017: Cell
https://www.readbyqxmd.com/read/29236047/hasc-and-dfat-multipotent-stem-cells-for-regenerative-medicine-a-comparison-of-their-potential-differentiation-in-vitro
#18
Marco Saler, Laura Caliogna, Laura Botta, Francesco Benazzo, Federica Riva, Giulia Gastaldi
Adipose tissue comprises both adipose and non-adipose cells such as mesenchymal stem cells. These cells show a surface antigenic profile similar to that of bone-marrow-derived MSC. The cells derived from the dedifferentiation of mature adipocytes (DFAT) are another cell population with characteristics of stemness. The aim of this study is to provide evidence of the stemness, proliferation, and differentiation of human adipose stem cells (hASC) and DFAT obtained from human subcutaneous AT and evaluate their potential use in regenerative medicine...
December 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29235464/syk-kinase-mediates-brown-fat-differentiation-and-activation
#19
Marko Knoll, Sally Winther, Anirudh Natarajan, Huan Yang, Mengxi Jiang, Prathapan Thiru, Aliakbar Shahsafaei, Tony E Chavarria, Dudley W Lamming, Lei Sun, Jacob B Hansen, Harvey F Lodish
Brown adipose tissue (BAT) metabolism influences glucose homeostasis and metabolic health in mice and humans. Sympathetic stimulation of β-adrenergic receptors in response to cold induces proliferation, differentiation, and UCP1 expression in pre-adipocytes and mature brown adipocytes. Here we show that spleen tyrosine kinase (SYK) is upregulated during brown adipocyte differentiation and activated by β-adrenergic stimulation. Deletion or inhibition of SYK, a kinase known for its essential roles in the immune system, blocks brown and white pre-adipocyte proliferation and differentiation in vitro, and results in diminished expression of Ucp1 and other genes regulating brown adipocyte function in response to β-adrenergic stimulation...
December 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/29224189/acute-loss-of-adipose-tissue-derived-adiponectin-triggers-immediate-metabolic-deterioration-in-mice
#20
Jonathan Y Xia, Kai Sun, Chelsea Hepler, Alexandra L Ghaben, Rana K Gupta, Yu A An, William L Holland, Thomas S Morley, Andrew C Adams, Ruth Gordillo, Christine M Kusminski, Philipp E Scherer
AIM/HYPOTHESIS: Adiponectin (APN), a circulating hormone secreted by mature adipocytes, has been extensively studied because it has beneficial metabolic effects. While many studies have focused on the congenital loss of APN and its effects on systemic body glucose and lipid metabolism, little is known about the effects triggered by acute loss of APN in the adult mouse. We anticipated that genetically induced acute depletion of APN in adult mice would have a more profound effect on systemic metabolic health than congenital deletion of Adipoq, the gene encoding APN, with its associated potential for adaptive responses that may mask the phenotypes...
December 9, 2017: Diabetologia
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