76
|
Schrey S, Stepan H, Richter J, Hopf LM, Kralisch S, Jank A, Ebert T, Blüher M, Stumvoll M, Fasshauer M. Serum levels of adipokine fibroblast growth factor-21 are increased in preeclampsia. Geburtshilfe Frauenheilkd 2013. [DOI: 10.1055/s-0033-1347716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
|
77
|
Schaarschmidt W, Richter J, Kley K, Kralisch S, Jank A, Ebert T, Lössner U, Jessnitzer B, Kratzsch J, Blüher M, Michael S, Fasshauer M, Stepan H. Serum levels of growth arrest specific protein 6 are increased in preeclampsia. Geburtshilfe Frauenheilkd 2013. [DOI: 10.1055/s-0033-1347730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
|
78
|
Richter J, Hindricks J, Hopf LM, Kley K, Kralisch S, Ebert T, Lößner U, Blüher M, Stumvoll M, Fasshauer M. Serum levels of the adipokine fibroblast growth factor-21 are increased in preeclampsia. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
79
|
Breitfeld J, Heiker JT, Böttcher Y, Schleinitz D, Tönjes A, Weidle K, Krause K, Küttner EB, Kieß W, Sträter N, Beck-Sickinger AG, Stumvoll M, Körner A, Blüher M, Kovacs P. Funktionelle Relevanz der Stop-Codon Mutation rs61757459 in Vaspin (SerpinA12). DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
80
|
Keller M, Schleinitz D, Müller I, Stumvoll M, Kovacs P, Blüher M, Böttcher Y. Global methylation level in human adipose tissue is related to fat distribution. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
81
|
Ebert T, Hindricks J, Kralisch S, Lössner U, Jessnitzer B, Hopf L, Blüher M, Stumvoll M, Fasshauer M. Serum levels of the myokine irisin are predicted by markers of insulin resistance during pregnancy and after delivery. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
82
|
Kern M, Klöting N, Mayoux E, Mark M, Klein T, Blüher M. Der Natrium-Glukose-Cotransporter-2 (SGLT-2)-Inhibitor Empagliflozin verbessert dosisabhängig die Insulinsensitivität bei db/db-Mäusen. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
83
|
Müller N, Hillebrand S, Schulte DM, Türk K, Neumann K, Stelmach-Mardas M, Hampe J, Schafmayer C, Brosch M, Schönfels WV, Ahrens M, Gutschow C, Zeuner R, Schröder JO, Blüher M, Schreiber S, Laudes M. B lymphocyte stimulator (BLyS) is a novel adipokine in humans in vivo being related to obesity but not to insulin resistance. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
84
|
Krüger J, Weidle K, Kern M, Enigk B, Prellberg M, Müller I, Schleinitz D, Breitfeld J, Tönjes A, Stumvoll M, Blüher M, Kovacs P, Klöting N. Functional characterization of the type 2 diabetes associated variant rs3832490 in repin1. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
85
|
Stockinger M, Nowicki M, Kosacka J, Klöting N, Blüher M, Bechmann I, Claßen J, Toyka K, Baum P. Auswirkungen verschiedener Anästhesievarianten auf die F-Wellen des Nervus ischiadicus der Ratte. KLIN NEUROPHYSIOL 2013. [DOI: 10.1055/s-0033-1337289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
86
|
Stockinger M, Nowicki M, Kosacka J, Klöting N, Blüher M, Bechmann I, Claßen J, Toyka K, Baum P. Einfluss von Eisen auf die Entwicklung einer diabetischen Neuropathie bei Ratten. KLIN NEUROPHYSIOL 2013. [DOI: 10.1055/s-0033-1337288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
87
|
Müller N, Hillebrand S, Schulte DM, Türk K, Neumann K, Hampe J, Kampen OV, Brosch M, Schönfels WV, Ahrens M, Zeuner R, Schröder JO, Blüher M, Schreiber S, Laudes M. B lymphocyte stimulator (BLyS) is a novel adipokine in humans in vivo being related to obesity but not to insulin resistance. Exp Clin Endocrinol Diabetes 2013. [DOI: 10.1055/s-0033-1336635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
88
|
Klinitzke G, Steinig J, Blüher M, Kersting A, Wagner B. Obesity and suicide risk in adults--a systematic review. J Affect Disord 2013; 145:277-84. [PMID: 22871535 DOI: 10.1016/j.jad.2012.07.010] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 07/11/2012] [Accepted: 07/12/2012] [Indexed: 01/22/2023]
Abstract
BACKGROUND There is evidence from prospective studies that obesity is positively associated with depression. In contradiction to this, however, a number of studies have revealed that the number of completed suicides decreases with increasing BMI. The objective of this systematic review is to elucidate this ambiguous research field, providing an overview of literature examining the relationship between obesity and risk of suicide in adults (>18 years). METHODS Literature searches of the databases PubMed/Medline, PsychInfo, and Web of Sciences were conducted. Fifteen studies concerning completed suicide, suicide attempts and suicidal ideation met the inclusion criteria (seven prospective and eight cross-sectional studies). RESULTS Eight studies evaluating completed suicide reported an inverse relationship between BMI and suicide, meaning that obese people are less likely to commit suicide than people of low or normal weight, whereas one study showed no association and one showed a positive association. Studies about suicide attempts and ideation, on the other hand, found results that differed depending on gender. While obese woman reported more suicide attempts and suicidal ideation, obese men reported less attempts and thoughts. DISCUSSION The role of confounding variables such as age or psychiatric illness on suicide risk are discussed and remaining research questions are outlined, especially regarding the role of different underlying biological pathways and consideration of different classes of obesity.
Collapse
|
89
|
Bernhard F, Landgraf K, Klöting N, Berthold A, Büttner P, Friebe D, Kiess W, Kovacs P, Blüher M, Körner A. Functional relevance of genes implicated by obesity genome-wide association study signals for human adipocyte biology. Diabetologia 2013; 56:311-22. [PMID: 23229156 DOI: 10.1007/s00125-012-2773-0] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 10/08/2012] [Indexed: 12/19/2022]
Abstract
AIMS/HYPOTHESIS Genome-wide association studies (GWAS) have identified numerous single-nucleotide polymorphisms associated with obesity, consequently implying a role in adipocyte biology for many closely residing genes. We investigated the functional relevance of such genes in human adipocytes. METHODS We selected eight genes (BDNF, MAF, MTCH2, NEGR1, NPC1, PTER, SH2B1 and TMEM18) from obesity GWAS and analysed their effect in human adipogenesis using small interfering (si)RNA-mediated knockdown, their regulation by metabolic agents in adipocytes and pre-adipocytes, and gene expression in paired samples of human fat biopsies (68 non-obese, 165 obese) by quantitative real-time PCR. RESULTS We show a two- to threefold upregulation of MAF, MTCH2 and NEGR1 and a two- to fourfold downregulation of BDNF and PTER during adipogenesis. Knockdown of BDNF (mean ± SEM; 83.8 ± 4.7% of control; p = 0.0002), MTCH2 (72.7 ± 9.5%; p = 0.0006), NEGR1 (70.2 ± 5.7%; p < 0.0001) and TMEM18 (70.8 ± 6.1%; p < 0.0001) significantly inhibited adipocyte maturation, while knockdown of the other proteins had no effect. Insulin slightly induced MAF (1.65-fold; p = 0.0009) and MTCH2 (1.72-fold; p < 0.0001), while it suppressed BDNF (59.6%; p = 0.0009), NEGR1 (58.0%; p = 0.0085) and TMEM18 (69.3%; p = 0.0377) in adipocytes. The synthetic glucocorticoid dexamethasone suppressed MAF (45.7%; p = 0.0022), BDNF (66.6%; p = 0.0012) and TMEM18 (63.5%; p = 0.0181), but induced NEGR1 (3.2-fold; p = 0.0117) expression. Furthermore, MTCH2, NEGR1 and TMEM18 were differentially expressed in subcutaneous and visceral adipose tissue. TMEM18 expression was decreased in the adipose tissue of obese patients, and negatively correlated with anthropometric variables and adipocyte size. CONCLUSIONS/INTERPRETATION Our results imply a regulatory role for TMEM18, BDNF, MTCH2 and NEGR1 in adipocyte differentiation and biology. In addition, we show a variation of MAF expression during adipogenesis, while NPC1, PTER and SH2B1 were not regulated.
Collapse
|
90
|
Gräßler J, Blüher M, Chavakis T. Adipositas und Inflammation. Dtsch Med Wochenschr 2013; 138:172-5. [DOI: 10.1055/s-0032-1327412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
91
|
Ungru J, Coenen M, Vervuert I, Blüher M, Raila J, Boston R. Effects of body weight reduction on blood adipokines and subcutaneous adipose tissue adipokine mRNA expression profiles in obese ponies. Vet Rec 2012; 171:528. [DOI: 10.1136/vr.100911] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
92
|
Weck M, Bornstein SR, Barthel A, Blüher M. [Strategies for successful weight reduction - focus on energy balance]. Dtsch Med Wochenschr 2012; 137:2223-8. [PMID: 23076670 DOI: 10.1055/s-0032-1327232] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The prevalence of obesity and related health problems is increasing worldwide and also in Germany. It is well known that substantial and sustained weight loss is difficult to accomplish. Therefore, a variety of studies has been performed in order to specify causes for weight gain and create hypotheses for better treatment options. Key factors of this problem are an adaptation of energy metabolism, especially resting metabolic rate (RMR), non-exercise thermogenesis and diet induced thermogenesis. The extremely high failure rate (> 80%) to keep the reduced weight after successful weight loss is due to adaptation processes of the body to maintain body energy stores. This so called "adaptive thermogenesis" is defined as a smaller than predicted change of energy expenditure in response to changes in energy balance. Adaptive thermogenesis appears to be a major reason for weight regain. The foremost objective of weight-loss programs is the reduction in body fat. However, a concomitant decline in lean tissue can frequently be observed. Since lean body mass (LBM) represents a key determinant of RMR it follows that a decrease in lean tissue could counteract the progress of weight loss. Therefore, with respect to long-term effectiveness of weight reduction programs, the loss of fat mass while maintaining LBM and RMR seems desirable. In this paper we will discuss the mechanisms of adaptive thermogenesis and develop therapeutic strategies with respect to avoiding weight regain successful weight reduction.
Collapse
|
93
|
Stepan H, Philipp A, Roth I, Kralisch S, Jank A, Schaarschmidt W, Lössner U, Kratzsch J, Blüher M, Stumvoll M, Fasshauer M. Serum levels of the adipokine zinc-α2-glycoprotein are increased in preeclampsia. J Endocrinol Invest 2012; 35:562-5. [PMID: 21791968 DOI: 10.3275/7877] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Preeclampsia (PE) is associated with facets of the metabolic syndrome and an increased future metabolic and cardiovascular risk for mother and newborn. Recently, zinc-α2-glycoprotein (ZAG) has been proposed as a new adipokine involved in the pathogenesis of obesity. AIM In the current study, we investigated ZAG serum levels in PE patients as compared to healthy gestational age-matched controls. SUBJECTS AND METHODS We quantified serum concentrations of ZAG in patients with PE (no.=37) as compared to healthy gestational age-matched controls (no.=37) by enzyme-linked immunosorbent assay. Furthermore, association of this adipokine with renal function, glucose and lipid metabolism, as well as inflammation was studied. RESULTS Median serum ZAG levels were 1.4-fold higher in PE patients (58.8 mg/l) as compared to controls (41.9 mg/l) (p<0.01). Furthermore, circulating ZAG was positively correlated to systolic and diastolic blood pressure, creatinine, triglycerides, and leptin in univariate analyses. In multiple regression analysis, creatinine remained independently associated with ZAG. CONCLUSIONS We demonstrate that maternal ZAG serum concentrations are significantly increased in PE. Furthermore, renal function is an independent predictor of circulating ZAG.
Collapse
|
94
|
Nerstedt A, Cansby E, Andersson CX, Laakso M, Stančáková A, Blüher M, Smith U, Mahlapuu M. Serine/threonine protein kinase 25 (STK25): a novel negative regulator of lipid and glucose metabolism in rodent and human skeletal muscle. Diabetologia 2012; 55:1797-807. [PMID: 22391949 DOI: 10.1007/s00125-012-2511-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Accepted: 02/02/2012] [Indexed: 12/13/2022]
Abstract
AIMS/HYPOTHESIS This study investigates the role of serine/threonine protein kinase 25 (STK25), a member of the sterile 20 (STE20) superfamily of kinases, in the regulation of skeletal muscle metabolism. METHODS The effect of depleting STK25 in muscle cells was studied by reducing the mRNA and protein content of this target in the rat myoblast cell line L6 by small interfering (si)RNA. The changes in the mRNA and protein levels of several members of the fatty acid oxidative and glucose metabolic pathways were measured by quantitative real-time (qRT)-PCR and western blot. The rate of palmitate oxidation and glucose uptake was measured after transfection with siRNA for Stk25. Expression of STK25 was also evaluated in skeletal muscle biopsies from 41 white Europid men and women with normal and impaired glucose tolerance and type 2 diabetes using qRT-PCR. RESULTS We demonstrate that partial depletion of STK25 increases the expression of uncoupling protein 3 (Ucp3), accompanied by increased lipid oxidation, in myoblasts. In addition, a reduced level of STK25 enhances the expression of Slc2a1 (also known as Glut1), Slc2a4 (also known as Glut4) and hexokinase 2, and correspondingly, improves insulin-stimulated glucose uptake in muscle cells. Consistent with these results, significantly higher STK25 levels were observed in the skeletal muscle of type 2 diabetic patients, compared with individuals with normal glucose tolerance. CONCLUSIONS/INTERPRETATION This is the first study indicating a possible role for STK25 in the regulation of glucose and lipid metabolism in L6 myoblasts. This kinase appears to be an interesting new mediator to be evaluated for therapeutic intervention in type 2 diabetes and related complications, as controlled increase in lipid oxidation and insulin-stimulated glucose uptake in skeletal muscle is favourable and can restore energy balance in metabolically compromised states.
Collapse
|
95
|
Richter J, Ebert T, Kralisch S, Lößner U, Jeßnitzer B, Blüher M, Stumvoll M, Fasshauer M. Copeptin serum levels are decreased in gestational diabetes mellitus. DIABETOL STOFFWECHS 2012. [DOI: 10.1055/s-0032-1314602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
96
|
Blüher M, Kurz I, Müller A, Dworak M. Tablettenlast bei Typ 2 Diabetikern - Ergebnisse der prospektiven nicht-interventionellen Studie PROVIL. DIABETOL STOFFWECHS 2012. [DOI: 10.1055/s-0032-1314611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
97
|
Friedrich N, Budde K, Wolf T, Jungnickel A, Grotevendt A, Dreßler M, Völzke H, Blüher M, Nauck M, Lohmann T, Wallaschofski H. Short-term changes of the urine metabolome after bariatric surgery. DIABETOL STOFFWECHS 2012. [DOI: 10.1055/s-0032-1314486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
98
|
Flehmig G, Fasshauer M, Klöting N, Schön MR, Stumvoll M, Blüher M. Sfrp5 serum concentration is associated with measures of glucose homeostasis and insulin sensitivity in human obesity. DIABETOL STOFFWECHS 2012. [DOI: 10.1055/s-0032-1314529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
99
|
Kern M, Heiker JT, Kosacka J, Knigge A, Stumvoll M, Kovacs P, Blüher M, Klöting N. Nicotinamide nucleotide transhydrogenase (NNT) is related to obesity in mice and humans. DIABETOL STOFFWECHS 2012. [DOI: 10.1055/s-0032-1314534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
100
|
Vogel H, Kanzleiter T, Scherneck S, Benz V, Kluge R, Blüher M, Montag D, Joost HG, Schürmann A. A microdeletion within a QTL hotspot on distal mouse chromosome 1 disrupts the Ifi202b gene and modulates metabolic and neuronal phenotypes. DIABETOL STOFFWECHS 2012. [DOI: 10.1055/s-0032-1314516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|