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adipocyte maturation

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https://www.readbyqxmd.com/read/27904680/enhancement-of-early-cardiac-differentiation-of-dedifferentiated-fat-cells-by-dimethyloxalylglycine-via-notch-signaling-pathway
#1
Fuhai Li, Zongzhuang Li, Zhi Jiang, Ye Tian, Zhi Wang, Wei Yi, Chenyun Zhang
Background: Hypoxia has been reported to possess the ability to induce mature lipid-filled adipocytes to differentiate into fibroblast-like multipotent dedifferentiated fat (DFAT) cells and stem cells such as iPSCs (interstitial pluripotent stem cells) and ESCs (embryonic stem cells) and then to differentiate into cardiomyocytes. However, the effect of hypoxia on cardiac differentiation of DFAT cells and its underlying molecular mechanism remains to be investigated. Objective: To investigate the role of hypoxia in early cardiac differentiation of DFAT cells and the underlying molecular mechanism...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27899593/the-kdm5-family-is-required-for-activation-of-pro-proliferative-cell-cycle-genes-during-adipocyte-differentiation
#2
Ann-Sofie B Brier, Anne Loft, Jesper G S Madsen, Thomas Rosengren, Ronni Nielsen, Søren F Schmidt, Zongzhi Liu, Qin Yan, Hinrich Gronemeyer, Susanne Mandrup
The KDM5 family of histone demethylases removes the H3K4 tri-methylation (H3K4me3) mark frequently found at promoter regions of actively transcribed genes and is therefore generally considered to contribute to corepression. In this study, we show that knockdown (KD) of all expressed members of the KDM5 family in white and brown preadipocytes leads to deregulated gene expression and blocks differentiation to mature adipocytes. KDM5 KD leads to a considerable increase in H3K4me3 at promoter regions; however, these changes in H3K4me3 have a limited effect on gene expression per se...
November 29, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27895151/high-fat-diet-promotes-mammary-gland-myofibroblast-differentiation-through-mir-140-downregulation
#3
Benjamin Wolfson, Yongshu Zhang, Ramkishore Gernapudi, Nadire Duru, Yuan Yao, Pang-Kuo Lo, Qun Zhou
Human breast adipose tissue is a heterogonous cell population consisting of mature white adipocytes, multipotent mesenchymal stem cells, committed progenitor cells, fibroblasts, endothelial cells, and immune cells. Dependent on external stimulation, adipose derived stem cells differentiate along diverse lineages into adipocytes, chondrocytes, osteoblasts, fibroblasts, and myofibroblasts. It is currently not fully understood how high-fat diet reprograms adipose-derived stem cells into myofibroblasts. In our study, we use regular-diet and high-fat diet induced obesity mouse models to investigate the role of dietary fat on myofibroblast differentiation in the mammary stromal microenvironment...
November 28, 2016: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/27891437/nevus-lipomatosus-cutaneous-superficialis-a-rare-hamartoma-report-of-two-cases
#4
Mayank Goyal, Vaishali Hainath Wankhade, Jayesh Ishwardas Mukhi, Rajesh Pratap Singh
Nevus Lipomatosus Cutaneous Superficialis (NLCS) is a rare benign hamartomatous disorder in which mature collection of adipocytes are present ectopically in the dermis. NLCS usually presents as multiple, soft, pedunculated, cerebriform, yellowish or skin colored papules, nodules, or plaques, mostly involving the pelvic or gluteal region. We herewith report two cases of adult onset classical NLCS. First case had a classical presentation with lesion on lower back while second case was associated with some unusual features like occurrence on pubic area and associated comedo-like lesions...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27886379/supernatants-of-adipocytes-from-obese-vs-normal-weight-women-and-breast-cancer-cells-in-vitro-impact-on-angiogenesis
#5
L Bougaret, L Delort, H Billard, C Lequeux, N Goncalves-Mendes, A Mojallal, O Damour, M-P Vasson, F Caldefie-Chezet
Breast cancer is correlated with a higher risk of metastasis in obese postmenopausal women. Adipokines, whose plasma concentrations are modulated in obese subjects, surrounds mammary cells, suggesting that adipocyte secretions affect mammary tumorogenesis. We hypothsesis that matures adipocytes secretions from obese women conditioned or not by breast neoplasic cells, increase changes on the stages of angiogenesis. Supernatants of human matures adipocytes differentiated from stem cells of either adipose tissue of normal weight (MA20) or obese (MA30) women or obtained from co-cultures between MA20 or MA30 and breast cancer cell line MCF-7 were collected...
November 25, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27882508/regional-early-development-and-eruption-of-permanent-teeth-case-report
#6
A M Al Mullahi, A Bakathir, S Al Jahdhami
BACKGROUND: Early development and eruption of permanent teeth are rarely reported in scientific literature. Early eruption of permanent teeth has been reported to occur due to local factors such as trauma or dental abscesses in primary teeth, and in systemic conditions. Congenital diffuse infiltrating facial lipomatosis (CDIFL) is a rare condition that belongs to a group of lipomatosis tumours. In this disorder, the mature adipocytes invade adjacent soft and hard tissues in the facial region...
November 23, 2016: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/27871177/glucose-and-insulin-stimulate-lipogenesis-in-porcine-adipocytes-dissimilar-and-identical-regulation-pathway-for-key-transcription-factors
#7
Zhang Guo Hua, Lu Jian Xiong, Chen Yan, Dai Hong Wei, ZhaXi YingPai, Zhao Yong Qing, Qiao Zi Lin, Feng Ruo Fei, Wang Ya Ling, Ma Zhong Ren
Lipogenesis is under the concerted action of ChREBP, SREBP-1c and other transcription factors in response to glucose and insulin. The isolated porcine preadipocytes were differentiated into mature adipocytes to investigate the roles and interrelation of these transcription factors in the context of glucose- and insulin-induced lipogenesis in pigs. In ChREBP-silenced adipocytes, glucose-induced lipogenesis decreased by ~70%, however insulin-induced lipogenesis was unaffected. Moreover, insulin had no effect on ChREBP expression of unperturbed adipocytes irrespective of glucose concentration, suggesting ChREBP mediate glucose-induced lipogenesis...
November 30, 2016: Molecules and Cells
https://www.readbyqxmd.com/read/27869309/roles-of-notch-signaling-in-adipocyte-progenitor-cells-and-mature-adipocytes
#8
REVIEW
Tizhong Shan, Jiaqi Liu, Weiche Wu, Ziye Xu, Yizhen Wang
Adipose tissues, composed with mature adipocytes and preadipocytic stromal/stem cells, play crucial roles in whole body energy metabolism and regenerative medicine. Mature adipocytes are derived and differentiated from mesenchymal stem cells (MSCs) or preadipocytes. This differentiation process, also called adipogenesis, is regulated by several signaling pathways and transcription factors. Notch1 signaling is a highly conserved pathway that is indispensable for stem cell hemostasis and tissue development. In adipocyte progenitor cells, Notch1 signaling regulates the adipogenesis process including proliferation and differentiation of the adipocyte progenitor cells in vitro...
November 21, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27867269/platyphylloside-isolated-from-betula-platyphylla-inhibit-adipocyte-differentiation-and-induce-lipolysis-via-regulating-adipokines-including-ppar%C3%AE-in-3t3-l1-cells
#9
Mina Lee, Sang Hyun Sung
BACKGROUND: Obesity causes or aggravates many health problems, both independently and in association with several pathological disorders, including Type II diabetes, hypertension, atherosclerosis, and cancer. Therefore, we screened small compounds isolated from natural products for the development of anti-obesity drugs. OBJECTIVE: The purpose of this study was to investigate the anti-adipogenic activities of platyphylloside, diarylheptanoid isolated from Betula platyphylla, which was selected based on the screening using 3T3-L1 cells...
October 2016: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/27866222/the-cytoskeletal-protein-septin-11-is-associated-with-human-obesity-and-is-involved-in-adipocyte-lipid-storage-and-metabolism
#10
Natalia Moreno-Castellanos, Amaia Rodríguez, Yoana Rabanal-Ruiz, Alejandro Fernández-Vega, José López-Miranda, Rafael Vázquez-Martínez, Gema Frühbeck, María M Malagón
AIMS/HYPOTHESIS: Septins are newly identified members of the cytoskeleton that have been proposed as biomarkers of a number of diseases. However, septins have not been characterised in adipose tissue and their relationship with obesity and insulin resistance remains unknown. Herein, we characterised a member of this family, septin 11 (SEPT11), in human adipose tissue and analysed its potential involvement in the regulation of adipocyte metabolism. METHODS: Gene and protein expression levels of SEPT11 were analysed in human adipose tissue...
November 19, 2016: Diabetologia
https://www.readbyqxmd.com/read/27864366/siah2-mediates-early-events-in-commitment-to-an-adipogenic-pathway
#11
Gail Kilroy, David H Burk, Z Elizabeth Floyd
Adipose tissue expansion occurs by increasing the size of existing adipocytes or by increasing the number of adipocytes via adipogenesis. Adipose tissue dysfunction in obesity is associated with adipocyte hypertrophy and impaired adipogenesis. We recently demonstrated that deletion of the ubiquitin ligase Siah2 is associated with enlarged adipocytes in lean or obese mice. In this study, we find that adipogenesis is impaired in 3T3-L1 preadipocytes stably transfected with Siah2 shRNA and that overexpression of Siah2 in non-precursor fibroblasts promotes adipogenesis...
November 18, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27862950/region-specific-effects-of-oestradiol-on-adipose-derived-stem-cell-differentiation-in-post-menopausal-women
#12
Kimberly A Cox-York, Christopher B Erickson, Rocio I Pereira, Daniel H Bessesen, Rachael E Van Pelt
The goal of this study was to determine the effect of acute transdermal 17β-oestradiol (E2 ) on the adipogenic potential of subcutaneous adipose-derived stem cells (ASC) in post-menopausal women. Post-menopausal women (n = 11; mean age 57 ± 4.5 years) were treated for 2 weeks, in a randomized, cross-over design, with transdermal E2 (0.15 mg) or placebo patches. Biopsies of abdominal (AB) and femoral (FEM) subcutaneous adipose tissue (SAT) were obtained after each treatment and mature adipocytes were analysed for cell size and ASC for their capacity for proliferation (growth rate), differentiation (triglyceride accumulation) and susceptibility to tumour necrosis factor alpha-induced apoptosis...
November 15, 2016: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/27859461/gene-expression-profiles-of-human-subcutaneous-and-visceral-adipose-derived-stem-cells
#13
Boyun Kim, Boram Lee, Mi-Kyung Kim, Seung Pyo Gong, Noh Hyun Park, Hyun Hoon Chung, Hee Seung Kim, Jae Hong No, Woong Yang Park, Ae Kyung Park, Jeong Mook Lim, Yong Sang Song
Subcutaneous and visceral adipose tissues show a different risk effect on metabolic disorders because they have distinct cellular properties. We isolated stem cells from the separate human adipose tissues to investigate that subcutaneous and visceral fat depots have metabolic differences. Adipose-derived stem cells (ASCs) were characterized by immunophenotype and differentiation potentials into adipogenic, osteogenic, and chondrogenic lineages. Although subcutaneous and visceral ASCs (S-ASC and V-ASC) express same surface markers (CD31(-) , CD34(-) , CD45(-) , CD73(+) , CD90(+) , and CD105(+) ) and have differentiation potentials, S-ASCs had higher capacity to proliferate and to differentiate into adipogenic lineage than V-ASCs...
November 17, 2016: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/27856429/knock-down-of-ptrf-ameliorates-adipocyte-differentiation-and-functionality-of-human-mesenchymal-stem-cells
#14
Sergio Perez-Diaz, Beatriz Garcia-Rodriguez, Yolanda Gonzalez-Irazabal, Monica Valero, Javier Lagos, J M Arbones-Mainar
Healthy expansion of human adipose tissue requires mesenchymal stem cells (hMSC) able to proliferate and differentiate into mature adipocytes. Characterization of those factors that coordinate hMSC-to-adipocyte transition is hence of paramount importance to modulate the adipose tissue expansion. It has been previously reported that the adipogenic program of hMSC can be disrupted by up-regulating caveolar proteins and Polymerase I and Transcript Release Factor (PTRF) is an integral component of caveolae highly expressed in adipose tissue...
November 16, 2016: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/27855539/mouse-p2y4-nucleotide-receptor-is-a-negative-regulator-of-cardiac-adipose-derived-stem-cell-differentiation-and-cardiac-fat-formation
#15
Anne Lemaire, Marion Vanorlé, Michael Horckmans, Larissa di Pietrantonio, Sophie Clouet, Bernard Robaye, Jean-Marie Boeynaems, Didier Communi
Cardiac adipose-derived stem cells (cASCs) have the ability to differentiate into multiple cell lineages giving them a high potential for use in regenerative medicine. Cardiac fat tissue still raises many unsolved questions related to its formation and features. P2Y nucleotide receptors have already been described as regulators of differentiation of bone-marrow derived stem cells but remain poorly investigated in cASCs. We defined here the P2Y4 nucleotide receptor as a negative regulator of cardiac fat formation and cASC differentiation...
November 17, 2016: Stem Cells and Development
https://www.readbyqxmd.com/read/27854126/human-adipogenesis-is-associated-with-genome-wide-dna-methylation-and-gene-expression-changes
#16
Christa Broholm, Anders Henrik Olsson, Alexander Perfilyev, Linn Gillberg, Ninna Schiøler Hansen, Ashfaq Ali, Brynjulf Mortensen, Charlotte Ling, Allan Vaag
AIM: To define the genomic distribution and function of DNA methylation changes during human adipogenesis. METHODS: We isolated adipocyte-derived stem cells from 13 individuals and analyzed genome-wide DNA methylation and gene expression in cultured adipocyte-derived stem cells and mature adipocytes. RESULTS: We observed altered DNA methylation of 11,947 CpG sites and altered expression of 11,830 transcripts after differentiation. De novo methylation was observed across all genomic elements...
November 17, 2016: Epigenomics
https://www.readbyqxmd.com/read/27846311/cold-exposure-induces-proliferation-of-mature-brown-adipocyte-in-a-%C3%A3-3-adrenergic-receptor-mediated-pathway
#17
Keigo Fukano, Yuko Okamatsu-Ogura, Ayumi Tsubota, Junko Nio-Kobayashi, Kazuhiro Kimura
Hyperplasia of brown adipose tissue (BAT) is a fundamental mechanism for adaptation to survive in the cold environment in rodents. To determine which cell types comprising BAT contribute to tissue hyperplasia, immunohistochemical analysis using a proliferative marker Ki67 was performed on the BAT from 6-week-old C57BL/6J mice housed at 23°C (control) or 10°C (cold) for 5 days. Interestingly, in the control group, the cell proliferative marker Ki67 was detected in the nuclei of uncoupling protein 1-positive mature brown adipocytes (7...
2016: PloS One
https://www.readbyqxmd.com/read/27833986/dermal-plexiform-spindle-cell-lipoma
#18
José Fernando Val-Bernal, Sandra Hermana
Spindle cell lipoma located in the dermis is uncommon. The plexiform variant of this tumor is rare. In fact, only six cases of this variant have been described previously. We report herein a case of dermal plexiform spindle cell lipoma with prominent myxoid matrix. A 47-year-old male patient presented with a solitary, 2.2 cm-cutaneous mass in the right buttock region that had slowly increased in size for over one year. The dermal lesion was characterized by a mixture of mature adipocytes, spindle shaped cells and inconspicuous ropey collagen bundles in a mucinous background...
2016: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/27830366/maturation-of-adipocytes-is-suppressed-by-fluid-shear-stress
#19
Jongyun Choi, Sei Young Lee, Yeong-Min Yoo, Chi Hyun Kim
Preadipocytes are mechano-responsive cells and their differentiation to adipocytes may be regulated by various types of physical stimulation. Understanding the mechanism of differentiation, which increases the number of adipocytes and lipid accumulation is important in the study of obesity-related diseases. In this study, we investigated the effects of physical stimulation at different stages of adipogenic differentiation using physiological levels of fluid shear stress. Preadipocytes were treated with dexamethasone, 3-isobutyl-1-methylxanthine and insulin for 3 days (induction period) and incubated for additional 6 days for maturation...
November 9, 2016: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/27825360/a-possible-regulatory-link-between-twist-1-and-ppar%C3%AE-gene-regulation-in-3t3-l1-adipocytes
#20
Rui Ren, Zhufeng Chen, Xia Zhao, Tao Sun, Yuchao Zhang, Jie Chen, Sumei Lu, Wanshan Ma
BACKGROUND: Peroxisome proliferator-activated receptor γ (PPARγ) is a critical gene that regulates the function of adipocytes. Therefore, studies on the molecular regulation mechanism of PPARγ are important to understand the function of adipose tissue. Twist 1 is another important functional gene in adipose tissue, and hundreds of genes are regulated by Twist 1. The aim of this study was to investigate the regulation of Twist 1 and PPARγ expression in 3T3-L1 mature adipocytes. METHODS: We induced differentiation in 3T3-L1 preadipocytes and examined alterations in Twist 1 and PPARγ expression...
November 8, 2016: Lipids in Health and Disease
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