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Leptin resistance

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https://www.readbyqxmd.com/read/28318384/increased-adipose-and-muscle-insulin-sensitivity-without-changes-in-serum-adiponectin-in-young-female-collegiate-athletes
#1
Kaori Kitaoka, Mika Takeuchi, Ayaka Tsuboi, Satomi Minato, Miki Kurata, Shigehiro Tanaka, Tsutomu Kazumi, Keisuke Fukuo
BACKGROUND: Effects of endurance training on adipose insulin sensitivity in association with body composition, circulating adipokines, and markers of inflammation have been studied less in young Asian subjects. METHODS: Adipose insulin sensitivity/resistance was compared between 170 female Japanese collegiate athletes and 311 nonathletes (18-24 years), who underwent measurements of serum adipokines, markers of insulin sensitivity, inflammation, and dual-energy X-ray absorptiometry...
March 20, 2017: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/28318332/abnormality-of-adipokines-and-endothelial-dysfunction-in-mexican-obese-adolescents-with-insulin-resistance
#2
Maria Del Carmen Ortiz Segura, Blanca Estela Del Río Navarro, Benjamín Antonio Rodríguez Espino, Laurence A Marchat, Fausto Sánchez Muñoz, Santiago Villafaña, Enrique Hong, Fabián Meza-Cuenca, Patrick Mailloux Salinas, Francisco Bolaños-Jiménez, Elena Zambrano, Abel Armando Arredondo-López, Guadalupe Bravo, Fengyang Huang
PURPOSE: The aim of this study was to investigate the possible relationship among insulin resistance (IR), endothelial dysfunction, and alteration of adipokines in Mexican obese adolescents and their association with metabolic syndrome (MetS). MATERIALS AND METHODS: Two hundred and twenty-seven adolescents were classified according to the body mass index (BMI) (control: N=104; obese: N=123) and homeostasis model of the assessment-insulin resistance index (HOMA-IR) (obese with IR: N=65)...
March 20, 2017: Endocrine Research
https://www.readbyqxmd.com/read/28314371/intrauterine-growth-restriction-programs-the-hypothalamus-of-adult-male-rats-integrated-analysis-of-proteomic-and-metabolomic-data
#3
Amanda Paula Pedroso, Adriana Pereira de Souza, Ana Paula Segantine Dornellas, Lila Missae Oyama, Cláudia Maria Oller Nascimento, Gianni Mara Silva Santos, José C Rosa, Ricardo Pimenta Bertolla, Jelena Klawitter, Uwe Christians, Alexandre Keiji Tashima, Eliane Beraldi Ribeiro
Programming of hypothalamic functions regulating energy homeostasis may play a role in intrauterine growth restriction (IUGR)-induced adulthood obesity. The present study investigated the effects of IUGR on the hypothalamus proteome and metabolome of adult rats submitted to 50% protein-energy restriction throughout pregnancy. Proteomic and metabolomic analyzes were performed by data independent acquisition mass spectrometry and multiple reaction monitoring, respectively. At age 4 months, the restricted rats showed elevated adiposity, increased leptin and signs of insulin resistance...
March 17, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28306538/leptin-and-adiponectin-levels-in-discordant-dichorionic-twins-at-72-hours-of-age-associations-with-anthropometric-parameters-and-insulin-resistance
#4
Svetlana J Milenković, Ljiljana B Mirković, Miljana Z Jovandarić, Dušan M Milenković, Violeta V Banković, Borisav Z Janković
BACKGROUND: Insulin resistance (IR) in adults has been associated with intrauterine growth restriction (IUGR). Leptin and adiponectin correlations with anthropometric parameters and IR at 72 h in discordant twins were tested. METHODS: We included 24 discordant (birth weight discordance ≥20% in relation to the heavier cotwin) and 30 concordant (birth weight discordance ≤10%) twins. RESULTS: A correlation between leptin (but not adiponectin) level and birth weight (BW), birth length and head circumference in IUGR twins was recorded (p<0...
March 17, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28302957/relationship-between-asymmetric-dimethylarginine-in-umbilical-cord-plasma-and-birth-weight-follows-a-u-shaped-curve
#5
Junji Takaya, Yuko Tanabe, Yuichi Kuroyanagi, Kazunari Kaneko
Asymmetric dimethylarginine (ADMA) is a nonselective nitric oxide (NO) synthase inhibitor associated with cardiovascular and metabolic disorders. NO regulates placental blood flow, which plays an important role in fetal growth. Many epidemiological studies have disclosed that restricted fetal growth is associated with an increased risk of insulin resistance in adult life. We studied the relationship between ADMA in cord blood and birth size. Nine small for gestational age (SGA) and 32 appropriate for gestational age (AGA) infants were studied...
March 7, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28294581/plasma-soluble-leptin-receptor-levels-are-associated-with-pancreatic-%C3%AE-cell-dysfunction-in-patients-with-type-2-diabetes
#6
Tomoaki Morioka, Masanori Emoto, Yuko Yamazaki, Masafumi Kurajoh, Koka Motoyama, Katsuhito Mori, Shinya Fukumoto, Atsushi Shioi, Tetsuo Shoji, Masaaki Inaba
AIMS/INTRODUCTION: A soluble form of the leptin receptor (soluble Ob-R) in circulation regulates leptin's bioactivity and is inversely associated with body adiposity and circulating leptin levels. However, no study has examined the clinical impact of soluble Ob-R on glucose metabolism in diabetes. This study aimed to investigate the association of plasma soluble Ob-R levels with insulin resistance and pancreatic β-cell function in patients with type 2 diabetes. MATERIALS AND METHODS: Two hundred and eighty nine Japanese patients with type 2 diabetes were included in this study...
March 14, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/28290879/-adipokines-level-in-metabolically-healthy-obese-saint-petersburg-inhabitants-esse-rf
#7
M A Boyarinova, A V Orlov, O P Rotar, A S Alieva, E V Moguchaya, E U Vasileva, V N Soltsev, E I Baranova, A O Konradi
AIM: to elucidate prevalence of phenotypes of metabolically heathy obesity (MHO) among inhabitants of Saint-Petersburg using various criteria and assess dependence levels of adipokines on obesity phenotype. MATERIAL AND METHODS: Within a framework of epidemiologic study ESSE-RF we formed a random sample of 1600 Saint-Petersburg inhabitants stratified according to gender and age. Examination of participants included anthropometry with measurement of waist circumference CRP and estimation of body mass index (BMI), measurement of arterial pressure, determination of fasting blood glucose, insulin (with calculation of index of insulin resistance -IIR), lipid spectrum, C-reactive protein (CRP), adiponectin, leptin...
August 2016: Kardiologiia
https://www.readbyqxmd.com/read/28290783/-optimization-of-control-of-blood-pressure-metabolic-disorders-and-target-organs-protection-with-fixed-perindopril-and-indapamide-combination-in-treated-patients-with-arterial-hypertension
#8
S V Nedogoda, E V Chumachek, A A Ledyaeva, V V Tsoma, A S Salasyuk, V O Smirnova, V Ju Hripaeva, R V Palashkin
PURPOSE: to assess the potential of fixed perindopril/indapamide combination (FPIC) to improve angioprotection in patients with arterial hypertension (AP) with various efficacy of preceding therapy with combination of losartan and hydrochlorothiazide (HCTZ). MATERIAL AND METHODS: We included in this open study 50 patients with AP divided into two equal-sized groups in dependence on the achievement of target blood pressure (BP) less than 140/90 mm Hg on preceding therapy with losartan (100 mg) and HCTZ (12...
February 2017: Kardiologiia
https://www.readbyqxmd.com/read/28288985/screen-time-is-associated-with-adiposity-and-insulin-resistance-in-children
#9
Claire M Nightingale, Alicja R Rudnicka, Angela S Donin, Naveed Sattar, Derek G Cook, Peter H Whincup, Christopher G Owen
BACKGROUND: Higher screen time is associated with type 2 diabetes (T2D) risk in adults, but the association with T2D risk markers in children is unclear. We examined associations between self-reported screen time and T2D risk markers in children. METHODS: Survey of 4495 children aged 9-10 years who had fasting cardiometabolic risk marker assessments, anthropometry measurements and reported daily screen time; objective physical activity was measured in a subset of 2031 children...
March 13, 2017: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/28288611/benefits-of-resistance-exercise-in-lean-women-with-fibromyalgia-involvement-of-igf-1-and-leptin
#10
Jan L Bjersing, Anette Larsson, Annie Palstam, Malin Ernberg, Indre Bileviciute-Ljungar, Monika Löfgren, Björn Gerdle, Eva Kosek, Kaisa Mannerkorpi
BACKGROUND: Chronic pain and fatigue improves by exercise in fibromyalgia (FM) but underlying mechanisms are not known. Obesity is increased among FM patients and associates with higher levels of pain. Symptom improvement after aerobic exercise is affected by body mass index (BMI) in FM. Metabolic factors such as insulin-like growth factor 1 (IGF-1) and leptin may be involved. In this study, the aim was to evaluate the role of metabolic factors in lean, overweight and obese women during resistance exercise, in relation to symptom severity and muscle strength in women with FM...
March 14, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28281237/adipokine-levels-versus-hepatic-histopathology-in-bariatric-surgery-patients
#11
Rafael Bergesch D'Incao, Cristiane Valle Tovo, Vanessa Suñé Mattevi, Diego Olschowsky Borges, Jane Maria Ulbrich, Gabriela Perdomo Coral, Mauricio Jacques Ramos, Nelson Guardiola Meinhardt
BACKGROUND: Obesity is a worldwide prevalent disease and is an underlying factor of non-alcoholic fatty liver disease (NAFLD). It has been understood as a chronic inflammatory state, being associated with the production of adipokines. The aim of this study was to analyze the levels of adipokines in the serum, visceral, and subcutaneous fat and to compare them with hepatic histopathology in morbidly obese patients. METHODS: This is a cross-sectional observational study, which analyzed the findings of liver biopsy in patients undergoing bariatric surgery and who had performed analysis of adipokines mRNA expression (adiponectin-ADIPOQ, leptin-LEP, and resistin-RETN) in subcutaneous and visceral adipose tissue and circulating adipokines in serum...
March 10, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28275162/leptin-signalling-in-agrp-neurons-modulates-puberty-onset-and-adult-fertility-in-mice
#12
Olivia K Egan, Megan A Inglis, Greg M Anderson
The hormone leptin indirectly communicates metabolic information to brain neurons that control reproduction, using GABAergic circuitry. Agouti-related peptide (AgRP) neurons in the arcuate nucleus are GABAergic, express leptin receptors (LepR) and are known to influence reproduction. This study tested whether leptin actions on AgRP neurons are required and sufficient for puberty onset and subsequent fertility. Firstly, Agrp-Cre and Lepr-flox mice were used to target deletion of LepR to AgRP neurons. AgRP-LepR knockout female mice exhibited mild obesity and adiposity as previously described, as well as a significant delay in the pubertal onset of estrous cycles compared to control animals...
March 8, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28271035/attenuated-secretion-of-glucose-dependent-insulinotropic-polypeptide-gip-does-not-alleviate-hyperphagic-obesity-and-insulin-resistance-in-ob-ob-mice
#13
Satoko Shimazu-Kuwahara, Norio Harada, Shunsuke Yamane, Erina Joo, Akiko Sankoda, Timothy J Kieffer, Nobuya Inagaki
OBJECTIVE: Glucose-dependent insulinotropic polypeptide (GIP) is released during meals and promotes nutrient uptake and storage. GIP receptor knockout mice are protected from diet induced weight gain and thus GIP antagonists have been proposed as a treatment for obesity. In this study, we assessed the role of GIP in hyperphagia induced obesity and metabolic abnormalities in leptin deficient (Lep(ob/ob)) mice. METHODS: We crossbred GIP-GFP knock-in homozygous mice (GIP(gfp/gfp)) that have complete GIP knockout, and mice heterozygous for the ob mutation (Lep(ob/+)) mice to generate Lep(ob/+)/GIP(+/+), Lep(ob/ob)/GIP(+/+), and Lep(ob/ob)/GIP(gfp/gfp) mice...
March 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28270597/interaction-between-plasma-fetuin-a-and-free-fatty-acids-predicts-changes-in-insulin-sensitivity-in-response-to-long-term-exercise
#14
Sindre Lee, Frode Norheim, Hanne L Gulseth, Torgrim M Langleite, Kristoffer J Kolnes, Daniel S Tangen, Hans K Stadheim, Gregor D Gilfillan, Torgeir Holen, Kåre I Birkeland, Jørgen Jensen, Christian A Drevon
The hepatokine fetuin-A can together with free fatty acids (FFAs) enhance adipose tissue (AT) inflammation and insulin resistance via toll-like receptor 4 (TLR4). Although some of the health benefits of exercise can be explained by altered release of myokines from the skeletal muscle, it is not well documented if some of the beneficial effects of exercise can be explained by altered secretion of hepatokines. The aim of this study was to examine the effect of interaction between fetuin-A and FFAs on insulin sensitivity after physical exercise...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28267584/leptin-resistance-and-hippocampal-behavioral-deficits
#15
REVIEW
Catherine Van Doorn, Victoria A Macht, Claudia A Grillo, Lawrence P Reagan
The adipocyte-derived hormone leptin is an important regulator of body weight and metabolism through activation of brain leptin receptors expressed in regions such as the hypothalamus. Beyond these well described and characterized activities of leptin in the hypothalamus, it is becoming increasingly clear that the central activities of leptin extend to the hippocampus. Indeed, leptin receptors are expressed in the hippocampus where these receptors are proposed to mediate various aspects of hippocampal synaptic plasticity that ultimately impact cognitive function...
March 4, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28255980/thyroid-dysfunction-in-obese-and-overweight-children
#16
Ewelina Witkowska-Sędek, Anna Kucharska, Małgorzata Rumińska, Beata Pyrżak
Obesity and thyroid function are closely related. Thyroid hormones are involved in the regulation of metabolism, thermogenesis, food intake, and fat oxidation. In obese children the most frequent hormonal abnormalities are slight hyperthyrotropinaemia and moderate increases in total T3 and/or fT3 concentrations. Those abnormalities are usually considered a cause of obesity, but according to recent studies, they should actually be considered an adaptation process aimed at increasing resting energy expenditure and total energy expenditure...
2017: Endokrynologia Polska
https://www.readbyqxmd.com/read/28245483/the-effect-of-apom-polymorphism-associated-with-hdl-metabolism-on-obese-korean-adults
#17
Myoungsook Lee, Jung-Im Kim, Seojin Choi, Yangsoo Jang, Sungbin Richard Sorn
BACKGROUND: Apolipoprotein M (apoM) is a recently identified apolipoprotein associated with high-density lipoprotein (HDL) in coronary artery disease (CAD), but the association between apoM polymorphism and obesity has not been reported. AIM: To investigate the association between apoM polymorphism and obesity prevalence in 584 Korean adults. METHODS: A total of 584 individuals aged between 30 and 80 years were recruited from Yonsei Medical Center in Seoul, Korea, and divided into obese (OB; body mass index, BMI ≥25) and nonobese (non-OB; BMI <25) groups...
March 1, 2017: Journal of Nutrigenetics and Nutrigenomics
https://www.readbyqxmd.com/read/28245454/leptin-neuroinflammation-and-obesity
#18
Nathalia R V Dragano, Roberta Haddad-Tovolli, Licio A Velloso
Hypothalamic resistance to adipostatic actions of leptin is a hallmark of obesity. Studies have revealed that hypothalamic inflammation, triggered in response to the consumption of large amounts of dietary fat, is an important mechanism in the development of leptin resistance. In this chapter, we will review the work that paved the way linking neuroinflammation of the hypothalamus and defective leptin action in obesity.
2017: Frontiers of Hormone Research
https://www.readbyqxmd.com/read/28242773/adipose-specific-deletion-of-kif5b-exacerbates-obesity-and-insulin-resistance-in-a-mouse-model-of-diet-induced-obesity
#19
Ju Cui, Jing Pang, Ya-Jun Lin, Huan Gong, Zhen-He Wang, Yun-Xuan Li, Jin Li, Zai Wang, Ping Jiang, Da-Peng Dai, Jian Li, Jian-Ping Cai, Jian-Dong Huang, Tie-Mei Zhang
Recent studies have shown that KIF5B (conventional kinesin heavy chain) mediates glucose transporter type 4 translocation and adiponectin secretion in 3T3-L1 adipocytes, suggesting an involvement of KIF5B in the homeostasis of metabolism. However, the in vivo physiologic function of KIF5B in adipose tissue remains to be determined. In this study, adipose-specific Kif5b knockout (F-K5bKO) mice were generated using the Cre-LoxP strategy. F-K5bKO mice had similar body weights to controls fed on a standard chow diet...
February 27, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28242305/intramuscular-injection-of-exogenous-leptin-induces-adiposity-glucose-intolerance-and-fatty-liver-by-repressing-the-jak2-stat3-pi3k-pathway-in-a-rat-model
#20
Lihong Wu, Guoxiong Chen, Wen Liu, Xuechao Yang, Jie Gao, Liwen Huang, Hongbing Guan, Zhengmao Li, Zhichao Zheng, Meiling Li, Weiwang Gu, Linhu Ge
Obesity, diabetes and fatty liver disease are extremely common in leptin-resistant patients. Dysfunction of leptin or its receptor is associated with obesity. The present study aimed to assess the effects of intramuscular injection of exogenous leptin or its receptor on fat deposition and leptin-insulin feedback regulation. Forty-five 40-day old female Sprague Dawley (SD) rats were injected thrice with leptin or its receptor intramuscularly. Adiposity and fat deposition were assessed by assessing the Lee's index, body weight, food intake, and total cholesterol, high density lipoprotein, low density lipoprotein, and triglyceride levels, as well as histological properties (liver and adipose tissue)...
February 24, 2017: General and Comparative Endocrinology
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