AdipocytePub Date : 2021-12-01DOI: 10.1080/21623945.2021.1965314
Qiong Wang, Yurong Wang, Danyan Xu
{"title":"The roles of T cells in obese adipose tissue inflammation.","authors":"Qiong Wang, Yurong Wang, Danyan Xu","doi":"10.1080/21623945.2021.1965314","DOIUrl":"10.1080/21623945.2021.1965314","url":null,"abstract":"<p><p>Adipose tissue inflammation in obese patients can cause a series of metabolic diseases. There are a variety of immune cells in adipose tissue, and studies have shown that T cells are associated with adipose tissue inflammation. This review aims to describe the current understanding of the relationship between T cells and adipose tissue inflammation, with a focus on regulation by T cell subtypes. Studies have shown that Th1, Th17 and CD8<sup>+</sup> T cells, which are important T cell subsets, can promote the development of adipose tissue inflammation, whereas Treg cells protect against inflammation, suggesting that targeting the mechanism by which T cell subtypes regulate adipose tissue inflammation is a potential therapeutic strategy for treating obesity. T cells play important roles in regulating obesity-associated adipose tissue inflammation, thus providing new research directions for the treatment of obesity. More studies are needed to clarify how T cell subtypes regulate adipose tissue inflammation to identify new treatments for obesity.</p>","PeriodicalId":7226,"journal":{"name":"Adipocyte","volume":"10 1","pages":"435-445"},"PeriodicalIF":3.3,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8463033/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39411304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AdipocytePub Date : 2021-12-01DOI: 10.1080/21623945.2021.1979277
Tuo Han, Yajie Fan, Jie Gao, Mahreen Fatima, Yali Zhang, Yiming Ding, Liang Bai, Congxia Wang
{"title":"Sodium glucose cotransporter 2 inhibitor dapagliflozin depressed adiposity and ameliorated hepatic steatosis in high-fat diet induced obese mice.","authors":"Tuo Han, Yajie Fan, Jie Gao, Mahreen Fatima, Yali Zhang, Yiming Ding, Liang Bai, Congxia Wang","doi":"10.1080/21623945.2021.1979277","DOIUrl":"https://doi.org/10.1080/21623945.2021.1979277","url":null,"abstract":"<p><p>With the increasing obesity prevalence, the rates of obesity-related diseases, including type 2 diabetes, non-alcoholic fatty liver disease (NAFLD), and cardiovascular diseases, have increased dramatically. Dapagliflozin, one of the sodium glucose cotransporter inhibitors, not only exerts hypoglycaemic effects through increasing urinary glucose excretion but alsoreprograms the metabolic system, leading to benefits in metabolic and cardiovascular diseases. In this study, pre-established obese mice on a high-fat diet were given dapagliflozin by gavage for fourweeks. It showed that dapagliflozin can enhance fat utilization and browning of adipose tissue and improve local oxidative stress, thus inhibiting fat accumulation and hepatic steatosis without disturbance in body weight or plasma glycolipid level. Overall, our study highlights the potential clinical application of SGLT2 inhibition in the prevention of obesity and related metabolic diseases, such as insulin resistance, NAFLD, and diabetes.</p>","PeriodicalId":7226,"journal":{"name":"Adipocyte","volume":"10 1","pages":"446-455"},"PeriodicalIF":3.3,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8475578/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39438288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AdipocytePub Date : 2021-12-01DOI: 10.1080/21623945.2020.1870060
Long Cheng, Jingkang Wang, Hongyu Dai, Yuhui Duan, Yongcheng An, Lu Shi, Yinglan Lv, Huimin Li, Chen Wang, Quantao Ma, Yaqi Li, Pengfei Li, Haifeng Du, Baosheng Zhao
{"title":"Brown and beige adipose tissue: a novel therapeutic strategy for obesity and type 2 diabetes mellitus.","authors":"Long Cheng, Jingkang Wang, Hongyu Dai, Yuhui Duan, Yongcheng An, Lu Shi, Yinglan Lv, Huimin Li, Chen Wang, Quantao Ma, Yaqi Li, Pengfei Li, Haifeng Du, Baosheng Zhao","doi":"10.1080/21623945.2020.1870060","DOIUrl":"https://doi.org/10.1080/21623945.2020.1870060","url":null,"abstract":"<p><p>Mammalian adipose tissue can be divided into two major types, namely, white adipose tissue (WAT) and brown adipose tissue (BAT). According to classical view, the main function of WAT is to store excess energy in the form of triglycerides, while BAT is a thermogenic tissue that acts a pivotal part in maintaining the core body temperature. White adipocytes display high plasticity and can transdifferentiate into beige adipocytes which have many similar morphological and functional properties with brown adipocytes under the stimulations of exercise, cold exposure and other factors. This phenomenon is also known as 'browning of WAT'. In addition to transdifferentiation, beige adipocytes can also come from de novo differentiation from tissue-resident progenitors. Activating BAT and inducing browning of WAT can accelerate the intake of glycolipids and reduce the insulin secretion requirement, which may be a new strategy to improve glycolipids metabolism and insulin resistance of obese and type 2 diabetes mellitus (T2DM) patients. This review mainly discusses the significance of brown and beige adipose tissues in the treatment of obesity and T2DM, and focuses on the effect of the browning agent on obesity and T2DM, which provides a brand-new theoretical reference for the prevention and treatment of obesity and T2DM.</p>","PeriodicalId":7226,"journal":{"name":"Adipocyte","volume":"10 1","pages":"48-65"},"PeriodicalIF":3.3,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21623945.2020.1870060","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38785438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AdipocytePub Date : 2021-05-12DOI: 10.1080/21623945.2022.2065715
Zhe Zhu, Akhtar A. Ali, Jing Wang, Shijin Qi, Z. Hua, Hongkun Ren, Liping Zhang, Hao Gu, A. Molenaar, M. Babar, Yanzhen Bi
{"title":"Myostatin increases the expression of matrix metalloproteinase genes to promote preadipocytes differentiation in pigs","authors":"Zhe Zhu, Akhtar A. Ali, Jing Wang, Shijin Qi, Z. Hua, Hongkun Ren, Liping Zhang, Hao Gu, A. Molenaar, M. Babar, Yanzhen Bi","doi":"10.1080/21623945.2022.2065715","DOIUrl":"https://doi.org/10.1080/21623945.2022.2065715","url":null,"abstract":"ABSTACT Myostatin (MSTN) resulted in reduced backfat thickness in MSTN-knockout (MSTN-KO) pigs, whereas the underlying mechanism remains elusive. In this study, RNA sequencing (RNA-seq) was used to screen differentially expressed genes (DEGs) in porcine fat tissues. We identified 285 DEGs, including 4 adipocyte differentiation-related genes (ADRGs). Matrix Metalloproteinase-2/7 (MMP-2/7), fibronectin (FN), and laminin (LN) were differentially expressed in MSTN-KO pigs compared with wild-type (WT) pigs. To investigate the molecular mechanism, we treated the preadipocytes with siRNA and recombinant MSTN protein. The results indicated that MSTN increased the expression of MMP-2/7/9 and promoted the preadipocyte differentiation. To further validate the effect of MSTN on MMP-2/7/9 expression, we treated MSTN-KO PK15 cells with recombinant MSTN protein and detected the expression of MMP-2/7/9. The data showed that MSTN increases the expression of MMP-2/7/9 in PK15. This study revealed that MSTN promoted preadipocyte differentiation and provided the basis for the mechanism of fatty deposition in pigs.","PeriodicalId":7226,"journal":{"name":"Adipocyte","volume":"11 1","pages":"266 - 275"},"PeriodicalIF":3.3,"publicationDate":"2021-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46860869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AdipocytePub Date : 2020-12-01DOI: 10.1080/21623945.2020.1763726
Dean A Myers, Krista Singleton, Kim Hyatt, Kanchan M Kaushal, Charles A Ducsay
{"title":"Long term hypoxia during gestation alters perirenal adipose tissue gene expression in the lamb.","authors":"Dean A Myers, Krista Singleton, Kim Hyatt, Kanchan M Kaushal, Charles A Ducsay","doi":"10.1080/21623945.2020.1763726","DOIUrl":"https://doi.org/10.1080/21623945.2020.1763726","url":null,"abstract":"<p><p>We previously reported that following long-term hypoxia (LTH), the ovine foetus exhibits enhanced expression of brown/beige adipose genes. This study was designed to determine if these changes are preserved after birth. Pregnant ewes were divided among three groups, 1) Control, sea level, 2) LTH, high altitude (3,820 m, LTH-HA) from ~ day 40 of gestation through ~14 days post-delivery and 3) LTH from ⁓ day 40 through day 137 of gestation then returned to the laboratory where atory reduced maternal PO<sub>2</sub> was maintained by nitrogen infusion. Following delivery, lambs remained at sea level (LTH-SL). Perirenal adipose tissue was collected at ~day 14, and qRT-PCR was used to quantify mRNA. Uncoupling protein 1 (UCP-1), PPAR gamma coactivator 1 (PGC1α), and deiodinase-2 (DIO2) mRNA levels were significantly lower in both LTH groups while PR domain containing 16 (PRDM16) levels did not differ. Peroxisome proliferator-activated receptor (PPARγ) was maintained in the LTH-HA group and significantly increased in the LTH-SL group, compared to control. Unlike our previous LTH foetal studies, the brown/beige fat phenotype was rapidly lost by day 14 postpartum compared to control, while PPARγ was maintained. This loss of the brown fat phenotype may promote obesity due to decreased energy expenditure, favouring fat deposition.</p>","PeriodicalId":7226,"journal":{"name":"Adipocyte","volume":"9 1","pages":"223-233"},"PeriodicalIF":3.3,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21623945.2020.1763726","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9470660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AdipocytePub Date : 2020-12-01DOI: 10.1080/21623945.2020.1770525
Konrad A Szychowski, Bartosz Skóra, Jakub Tobiasz, Jan Gmiński
{"title":"Elastin-derived peptide VGVAPG decreases differentiation of mouse embryo fibroblast (3T3-L1) cells into adipocytes.","authors":"Konrad A Szychowski, Bartosz Skóra, Jakub Tobiasz, Jan Gmiński","doi":"10.1080/21623945.2020.1770525","DOIUrl":"https://doi.org/10.1080/21623945.2020.1770525","url":null,"abstract":"<p><p>Elastin is a highly elastic protein present in connective tissue. As a result of protease activity, elastin hydrolysis occurs, and during this process, elastin-derived peptides (EDPs) are released. One of the constitutively repeating elastin and EDP building sequences is the hexapeptide VGVAPG. Therefore, the aim of our research was to define the effect of VGVAPG peptide on adipogenesis in a mouse 3T3-L1 cell line. 3T3-L1 cells were differentiated according to a previously described protocol and exposed to increasing concentrations of VGVAPG or VVGPGA peptide. The obtained results showed that VGVAPG peptide does not stimulate reactive oxygen species (ROS) production, caspase-1 activation, and 3T3-L1 cell proliferation. In the second part of the experiments, it was proved that VGVAPG peptide decreased lipid accumulation as measured by oil red O staining, which was confirmed by the profile of increased expression markers of undifferentiated preadipocytes. In our experiments, 10 nM VGVAPG added for differentiating to adipocytes increased the expression of Pref-1, serpin E1, and adiponectin as compared to rosiglitazone (PPARγ agonist)-treated group and simultaneously decreased the expression of VEGF and resistin as compared to the rosiglitazone-treated group. The obtained results show that VGVAPG peptide sustains 3T3 cells in undifferentiated state.</p><p><strong>Abbreviations: </strong>DMSO: dimethyl sulphoxide; EBP: elastin-binding protein; EDPs: elastin-derived peptides; FBS: foetal bovine serum; <i>Glb1</i>: gene for beta-galactosidase; LDL: low-density-lipoprotein; PAI-1 (Serpin E1): plasminogen activator inhibitor-1; PBS: phosphate-buffered saline; PPARγ: peroxisome proliferator-activated receptor gamma; Pref-1: preadipocyte factor 1; ROS: reactive oxygen species; VEGF-A: vascular endothelial growth factor-A; VGVAPG: Val-Gly-Val-Ala-Pro-Gly; β-Gal: beta-galactosidase; ORO: oil red O; IBMX: 3-isobutyl-1-methylxanthine; H<sub>2</sub>DCFDA: 2',7'-dichlorodihydrofluorescein diacetate; DMEM: Dulbecco's Modified Eagle's Medium; VVGPGA: Val-Val-Gly-Pro-Gly-Ala.</p>","PeriodicalId":7226,"journal":{"name":"Adipocyte","volume":"9 1","pages":"234-245"},"PeriodicalIF":3.3,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21623945.2020.1770525","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10291941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AdipocytePub Date : 2020-12-01DOI: 10.1080/21623945.2020.1743116
Ernesto Rodriguez-Ayala, Esther C Gallegos-Cabrales, Laura Gonzalez-Lopez, Hugo A Laviada-Molina, Rocio A Salinas-Osornio, Edna J Nava-Gonzalez, Irene Leal-Berumen, Claudia Escudero-Lourdes, Fabiola Escalante-Araiza, Fatima A Buenfil-Rello, Vanessa-Giselle Peschard, Antonio Laviada-Nagel, Eliud Silva, Rosa A Veloz-Garza, Angelica Martinez-Hernandez, Francisco M Barajas-Olmos, Fernanda Molina-Segui, Lucia Gonzalez-Ramirez, Rebeca Espadas-Olivera, Ricardo Lopez-Muñoz, Ruy D Arjona-Villicaña, Victor M Hernandez-Escalante, Martha E Rodriguez-Arellano, Janeth F Gaytan-Saucedo, Zoila Vaquera, Monica Acebo-Martinez, Judith Cornejo-Barrera, Jancy Andrea Huertas-Quintero, Juan Carlos Castillo-Pineda, Areli Murillo-Ramirez, Sara P Diaz-Tena, Benigno Figueroa-Nuñez, Melesio E Valencia-Rendon, Rafael Garzon-Zamora, Juan Manuel Viveros-Paredes, José Ángeles-Chimal, Jesús Santa-Olalla Tapia, José M Remes-Troche, Salvador B Valdovinos-Chavez, Eira E Huerta-Avila, Juan Carlos Lopez-Alvarenga, Anthony G Comuzzie, Karin Haack, Xianlin Han, Lorena Orozco, Susan Weintraub, Jack W Kent, Shelley A Cole, Raul A Bastarrachea
{"title":"Towards precision medicine: defining and characterizing adipose tissue dysfunction to identify early immunometabolic risk in symptom-free adults from the GEMM family study.","authors":"Ernesto Rodriguez-Ayala, Esther C Gallegos-Cabrales, Laura Gonzalez-Lopez, Hugo A Laviada-Molina, Rocio A Salinas-Osornio, Edna J Nava-Gonzalez, Irene Leal-Berumen, Claudia Escudero-Lourdes, Fabiola Escalante-Araiza, Fatima A Buenfil-Rello, Vanessa-Giselle Peschard, Antonio Laviada-Nagel, Eliud Silva, Rosa A Veloz-Garza, Angelica Martinez-Hernandez, Francisco M Barajas-Olmos, Fernanda Molina-Segui, Lucia Gonzalez-Ramirez, Rebeca Espadas-Olivera, Ricardo Lopez-Muñoz, Ruy D Arjona-Villicaña, Victor M Hernandez-Escalante, Martha E Rodriguez-Arellano, Janeth F Gaytan-Saucedo, Zoila Vaquera, Monica Acebo-Martinez, Judith Cornejo-Barrera, Jancy Andrea Huertas-Quintero, Juan Carlos Castillo-Pineda, Areli Murillo-Ramirez, Sara P Diaz-Tena, Benigno Figueroa-Nuñez, Melesio E Valencia-Rendon, Rafael Garzon-Zamora, Juan Manuel Viveros-Paredes, José Ángeles-Chimal, Jesús Santa-Olalla Tapia, José M Remes-Troche, Salvador B Valdovinos-Chavez, Eira E Huerta-Avila, Juan Carlos Lopez-Alvarenga, Anthony G Comuzzie, Karin Haack, Xianlin Han, Lorena Orozco, Susan Weintraub, Jack W Kent, Shelley A Cole, Raul A Bastarrachea","doi":"10.1080/21623945.2020.1743116","DOIUrl":"10.1080/21623945.2020.1743116","url":null,"abstract":"<p><p>Interactions between macrophages and adipocytes are early molecular factors influencing adipose tissue (AT) dysfunction, resulting in high leptin, low adiponectin circulating levels and low-grade metaflammation, leading to insulin resistance (IR) with increased cardiovascular risk. We report the characterization of AT dysfunction through measurements of the adiponectin/leptin ratio (ALR), the adipo-insulin resistance index (Adipo-IRi), fasting/postprandial (F/P) immunometabolic phenotyping and direct F/P differential gene expression in AT biopsies obtained from symptom-free adults from the GEMM family study. AT dysfunction was evaluated through associations of the ALR with F/P insulin-glucose axis, lipid-lipoprotein metabolism, and inflammatory markers. A relevant pattern of negative associations between decreased ALR and markers of systemic low-grade metaflammation, HOMA, and postprandial cardiovascular risk hyperinsulinemic, triglyceride and GLP-1 curves was found. We also analysed their plasma non-coding microRNAs and shotgun lipidomics profiles finding trends that may reflect a pattern of adipose tissue dysfunction in the fed and fasted state. Direct gene differential expression data showed initial patterns of AT molecular signatures of key immunometabolic genes involved in AT expansion, angiogenic remodelling and immune cell migration. These data reinforce the central, early role of AT dysfunction at the molecular and systemic level in the pathogenesis of IR and immunometabolic disorders.</p>","PeriodicalId":7226,"journal":{"name":"Adipocyte","volume":"9 1","pages":"153-169"},"PeriodicalIF":3.5,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7153654/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10346133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AdipocytePub Date : 2020-12-01DOI: 10.1080/21623945.2020.1749500
Clarissa Strieder-Barboza, Nicki A Baker, Carmen G Flesher, Monita Karmakar, Ayush Patel, Carey N Lumeng, Robert W O'Rourke
{"title":"Depot-specific adipocyte-extracellular matrix metabolic crosstalk in murine obesity.","authors":"Clarissa Strieder-Barboza, Nicki A Baker, Carmen G Flesher, Monita Karmakar, Ayush Patel, Carey N Lumeng, Robert W O'Rourke","doi":"10.1080/21623945.2020.1749500","DOIUrl":"https://doi.org/10.1080/21623945.2020.1749500","url":null,"abstract":"<p><p>Subcutaneous (SAT) and visceral (VAT) adipose tissues have distinct metabolic phenotypes. We hypothesized that the extracellular matrix (ECM) regulates depot-specific differences in adipocyte metabolic function in murine obesity. VAT and SAT preadipocytes from lean or obese mice were subject to adipogenic differentiation in standard 2D culture on plastic tissue culture plates or in 3D culture in ECM, followed by metabolic profiling. Adipocytes from VAT relative to SAT manifested impaired insulin-stimulated glucose uptake and decreased adipogenic capacity. In 3D-ECM-adipocyte culture, ECM regulated adipocyte metabolism in a depot-specific manner, with SAT ECM rescuing defects in glucose uptake and adipogenic gene expression in VAT adipocytes, while VAT ECM impaired adipogenic gene expression in SAT adipocytes. These findings demonstrate that ECM-adipocyte crosstalk regulates depot-specific differences in adipocyte metabolic dysfunction in murine obesity.</p>","PeriodicalId":7226,"journal":{"name":"Adipocyte","volume":"9 1","pages":"189-196"},"PeriodicalIF":3.3,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21623945.2020.1749500","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9918481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AdipocytePub Date : 2019-12-01DOI: 10.1080/21623945.2019.1698791
Yael Tal, Nava Chapnik, Oren Froy
{"title":"Non-obesogenic doses of palmitate disrupt circadian metabolism in adipocytes.","authors":"Yael Tal, Nava Chapnik, Oren Froy","doi":"10.1080/21623945.2019.1698791","DOIUrl":"10.1080/21623945.2019.1698791","url":null,"abstract":"<p><p>Saturated fatty acids, such as palmitate, lead to circadian disruption. We aimed at studying the effect of low doses of palmitate on circadian metabolism and to decipher the mechanism by which fatty acids convey their effect in adipocytes. Mice were fed non-obesogenic doses of palm or olive oil and adipocytes were treated with palmitate and oleate. Cultured adipocytes treated with oleate showed increased AMPK activity and induced the expression of mitochondrial genes indicating increased fatty acid oxidation, while palmitate increased ACC activity and induced the expression of lipogenic genes, indicating increased fatty acid synthesis. Low doses of palmitate were sufficient to alter circadian rhythms, due to changes in the expression and/or activity of key metabolic proteins including GSK3β and AKT. Palmitate-induced AKT and GSK3β activation led to the phosphorylation of BMAL1 that resulted in low levels as well as high amplitude of circadian clock expression. In adipocytes, the detrimental metabolic alteration of palmitate manifests itself early on even at non-obesogenic levels. This is accompanied by modulating BMAL1 expression and phosphorylation levels, which lead to dampened clock gene expression.</p>","PeriodicalId":7226,"journal":{"name":"Adipocyte","volume":"8 1","pages":"392-400"},"PeriodicalIF":3.3,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21623945.2019.1698791","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44753163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AdipocytePub Date : 2019-12-01DOI: 10.1080/21623945.2019.1693747
Stephanie E King, Eric Nilsson, Daniel Beck, Michael K Skinner
{"title":"Adipocyte epigenetic alterations and potential therapeutic targets in transgenerationally inherited lean and obese phenotypes following ancestral exposures.","authors":"Stephanie E King, Eric Nilsson, Daniel Beck, Michael K Skinner","doi":"10.1080/21623945.2019.1693747","DOIUrl":"10.1080/21623945.2019.1693747","url":null,"abstract":"<p><p>The incidence of obesity has increased dramatically over the past two decades with a prevalence of approximately 40% of the adult population within the United States. The current study examines the potential for transgenerational adipocyte (fat cell) epigenetic alterations. Adipocytes were isolated from the gonadal fat pad of the great-grand offspring F3 generation 1-year old rats ancestrally exposed to DDT (dichlorodiphenyltrichloroethane), atrazine, or vehicle control in order to obtain adipocytes for DNA methylation analysis. Observations indicate that there were differential DNA methylated regions (DMRs) in the adipocytes with the lean or obese phenotypes compared to control normal (non-obese or lean) populations. The comparison of epigenetic alterations indicated that there were substantial overlaps between the different treatment lineage groups for both the lean and obese phenotypes. Novel correlated genes and gene pathways associated with DNA methylation were identified, and may aid in the discovery of potential therapeutic targets for metabolic diseases such as obesity. Observations indicate that ancestral exposures during critical windows of development can induce the epigenetic transgenerational inheritance of DNA methylation changes in adipocytes that ultimately may contribute to an altered metabolic phenotype.</p>","PeriodicalId":7226,"journal":{"name":"Adipocyte","volume":"8 1","pages":"362-378"},"PeriodicalIF":3.3,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21623945.2019.1693747","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46586659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}