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Adiponectin AND AMPK

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https://www.readbyqxmd.com/read/29668847/adiponectin-determines-farnesoid-x-receptor-agonism-mediated-cardioprotection-against-post-infarction-remodeling-and-dysfunction
#1
Yunlong Xia, Fuyang Zhang, Shihao Zhao, Yueyang Li, Xiyao Chen, Erhe Gao, Xinyue Xu, Zhenyu Xiong, Xiaomeng Zhang, Jinglong Zhang, Huishou Zhao, Wei Wang, Helin Wang, Yanjie Guo, Yi Liu, Congye Li, Shan Wang, Ling Zhang, Wenjun Yan, Ling Tao
Aims: The farnesoid X receptor (FXR) is a member of the metabolic nuclear receptor superfamily that plays a critical regulatory role in cardiovascular physiology/pathology. However, the role of systemic FXR activation in the chronic phase in myocardial infarction (MI)-induced cardiac remodeling and dysfunction remains unclear. In this study, we aimed to elucidate the role of long-term FXR activation on post-MI cardiac remodeling and dysfunction. Methods and Results: Mice underwent either MI surgery or sham operation...
April 14, 2018: Cardiovascular Research
https://www.readbyqxmd.com/read/29614883/bergamottin-inhibits-adipogenesis-in-3t3-l1-cells-and-weight-regulation-in-diet-induced-obese-mice
#2
Jeong-Hyeon Ko, Dongwoo Nam, Jae-Young Um, Sang Hoon Jung, Kwang Seok Ahn
Obesity is a serious and increasing health problem worldwide, and the inhibition of adipogenesis is considered to be a potential therapeutic target for it. Bergamottin (BGM), a component of grapefruit juice, has been reported to regulate lipolysis. However, the physiological role of BGM in obesity has not been evaluated so far. In the present study, we investigated the effects of BGM on obesity in 3T3-L1 cells and in mice fed a high-fat diet (HFD). BGM inhibited adipogenic differentiation of 3T3-L1 cells along with a significant decrease in the lipid content by downregulating the expression of two critical adipogenic factors, CCAAT enhancer-binding protein-alpha (C/EBP[Formula: see text]) and peroxisome proliferator activated receptor-gamma (PPAR[Formula: see text])...
April 4, 2018: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/29595858/calycosin-directly-improves-perivascular-adipose-tissue-dysfunction-by-upregulating-the-adiponectin-ampk-enos-pathway-in-obese-mice
#3
Fang Han, Kai Li, Ruiyan Pan, Wenjie Xu, Xue Han, Ningning Hou, Xiaodong Sun
Perivascular adipose tissue (PVAT) loses its anti-contractile activity in obesity. Calycosin, the major bioactive isoflavonoid, was shown to protect endothelial function. However, effects of calycosin on PVAT function in obesity remain unclear. We aimed to investigate the effects of calycosin on the anti-contractile activity of PVAT in obese mice and its potential mechanisms. Obesity in mice was induced with a high-fat diet, with or without calycosin treatment. Thoracic aorta responses to phenylephrine were determined...
March 29, 2018: Food & Function
https://www.readbyqxmd.com/read/29568898/adiponectin-protects-against-lung-ischemia-reperfusion-injury-in-rats-with-type-2-diabetes-mellitus
#4
Di Li, Lin-Lin Song, Juan Wang, Chao Meng, Xiao-Guang Cui
Adiponectin (APN) has been associated with the pathogenesis of acute brain, liver and heart injury. However, the role of APN in lung ischemia-reperfusion injury (LIRI) in diabetes mellitus remains unclear. To investigate this, the present study evaluated the effects of APN on lung dysfunction and pathological alterations in rats with type 2 diabetes mellitus via lung ischemia/reperfusion (I/R). The lung‑protective effects of APN globular domain (gAPN) in rats with type 2 diabetes mellitus were also investigated by measuring the oxygenation index, inflammatory cytokines, lung edema, histopathology, oxidative stress, apoptosis and the protein expression levels of phosphorylated 5'adenosine monophosphate‑activated protein kinase (p‑AMPK), endothelial nitric oxide synthase (eNOS) and inducible nitric oxide synthase (iNOS)...
March 14, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29559683/plasma-adiponectin-levels-are-correlated-with-body-composition-metabolic-profiles-and-mitochondrial-markers-in-individuals-with-chronic-spinal-cord-injury
#5
Laura C O'Brien, Zachary A Graham, Qun Chen, Edward J Lesnefsky, Christopher Cardozo, Ashraf S Gorgey
STUDY DESIGN: Cross-sectional design. OBJECTIVES: This study examined the relationships between circulating adiponectin levels, body composition, metabolic profile, and measures of skeletal muscle mitochondrial enzyme activity and biogenesis. SETTINGS: Clinical Research in a Medical Center. METHODS: Plasma adiponectin was quantified in 19 individuals with chronic spinal cord injury (SCI). Body composition was evaluated by dual x-ray absorptiometry and magnetic resonance imaging...
March 20, 2018: Spinal Cord
https://www.readbyqxmd.com/read/29558911/aqueous-and-ethanolic-extracts-of-welsh-onion-allium-fistulosum-attenuate-high-fat-diet-induced-obesity
#6
Yoon-Young Sung, Dong-Seon Kim, Seung-Hyung Kim, Ho Kyoung Kim
BACKGROUND: Allium fistulosum (Welsh onion) is a traditional medicinal plant used for the treatment of colds, influenza, abdominal pain, headache, and heart disease. This study evaluated the effects of A. fistulosum ethanolic extract (AFE) and aqueous extract (AFW) on body weight and other obesity-related parameters. METHODS: Male 8-week-old C57BL/6 J mice were fed either a standard chow diet (normal control) or a high-fat diet (HFD) either alone (HFD-control) or in combination with G...
March 20, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29551973/shexiang-baoxin-pill-corrects-metabolic-disorders-in-a-rat-model-of-metabolic-syndrome-by-targeting-mitochondria
#7
Dan Wei, Ningning Zheng, Lanyan Zheng, Leting Wang, Liang Song, Luning Sun
Background: Metabolic syndrome (MS) is a global epidemic that has great socioeconomic and public health implications. This study reports observed effects of the Shexiang Baoxin Pill (SBP) in a rat model of MS and explores its underlying mechanisms of action. Methods: A diet-induced rat model of MS was established according to accepted methods, and the rats were randomly divided into two groups: a control group (0.9% NaCl, 100 mg/kg• d) and a SBP-treated group (SBP, 100 mg/kg• d). Systolic blood pressures, fasting blood glucose (FBS) levels, triglyceride (TG) levels, high-density lipoprotein cholesterol (HDL-C) levels, body weights, and abdominal perimeters were dynamically monitored and analyzed...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29515462/amp-activated-protein-kinase-ampk-regulates-energy-metabolism-through-modulating-thermogenesis-in-adipose-tissue
#8
Lingyan Wu, Lina Zhang, Bohan Li, Haowen Jiang, Yanan Duan, Zhifu Xie, Lin Shuai, Jia Li, Jingya Li
Obesity occurs when excess energy accumulates in white adipose tissue (WAT), whereas brown adipose tissue (BAT), which is specialized in dissipating energy through thermogenesis, potently counteracts obesity. White adipocytes can be converted to thermogenic "brown-like" cells (beige cells; WAT browning) under various stimuli, such as cold exposure. AMP-activated protein kinase (AMPK) is a crucial energy sensor that regulates energy metabolism in multiple tissues. However, the role of AMPK in adipose tissue function, especially in the WAT browning process, is not fully understood...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29514131/potential-of-resveratrol-in-mitigating-metabolic-disturbances-induced-by-ethanol
#9
REVIEW
Tomasz Szkudelski, Katarzyna Szkudelska
Alcohol abuse is associated with numerous health problems, including metabolic disturbances and liver damage. Therefore, different compounds are continuously being tested to evaluate their potential effectiveness in reducing these harmful changes. Animal studies clearly show that resveratrol is capable of ameliorating some consequences of ethanol ingestion. Resveratrol is a naturally occurring diphenolic compound having pleiotropic, health-promoting properties. Its beneficial action have been also demonstrated in animal models with ethanol-induced metabolic disturbances and liver injury...
March 4, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29513571/uncoupling-effects-of-estrogen-receptor-%C3%AE-on-lkb1-ampk-interaction-upon-adiponectin-exposure-in-breast-cancer
#10
Loredana Mauro, Giuseppina Daniela Naimo, Luca Gelsomino, Rocco Malivindi, Leonardo Bruno, Michele Pellegrino, Roberta Tarallo, Domenico Memoli, Alessandro Weisz, Maria Luisa Panno, Sebastiano Andò
Adipose tissue is a metabolic and endocrine organ that secretes bioactive molecules called adipocytokines. Among these, adiponectin has a crucial role in obesity-associated breast cancer. The key molecule of adiponectin signaling is AMPK, which is mainly activated by liver kinase B1 (LKB1). Here, we demonstrated that estrogen receptor-α (ERα)/LKB1 interaction may negatively interfere with the LKB1 capability to phosphorylate AMPK and inhibit its downstream signaling TSC2/mTOR/p70S6k. In adiponectin-treated MCF-7 cells, AMPK signaling was not working, resulting in its downstream target acetyl-CoA carboxylase (ACC) being still active...
March 7, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29512400/adiponectin-receptor-1-mediated-micro-rna-323-3p-regulates-functions-of-the-min6-cell-line-via-the-amp-activated-protein-kinase-sirtuin-1-pathway
#11
Xiaojuan Wang, Jun Li, Wei Tang, Yiqiao Zhao, Xing Li
Background The development of an effective treatment for type 2 diabetes mellitus is urgently needed. This study aimed to investigate the role of micro RNA (miR)-323-3p in regulating the expression of adiponectin receptor 1 (AdipoR1), as well as the insulin secretion and cell function of pancreatic MIN6 β-cells. Methods MIN6 cells were treated with miR-323-3p mimics or inhibitors, and the effects on cell growth, proliferation, mitosis, and insulin secretion were studied. The expression levels of sirtuin-1 (SIRT-1) and AMP-activated protein kinase (AMPK) genes were also assessed...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29486166/adiponectin-attenuates-neuronal-apoptosis-induced-by-hypoxia-ischemia-via-the-activation-of-adipor1-appl1-lkb1-ampk-pathway-in-neonatal-rats
#12
Ningbo Xu, Yixin Zhang, Desislava Met Doycheva, Yan Ding, Yiting Zhang, Jiping Tang, Hongbo Guo, John H Zhang
Adiponectin is an important adipocyte-derived plasma protein that has beneficial effects on cardio- and cerebrovascular diseases. A low level of plasma Adiponectin is associated with increased mortality post ischemic stroke; however, little is known about the causal role of Adiponectin as well as its molecular mechanisms in neonatal hypoxia ischemia (HI). In the present study, ten-day-old rat pups were subjected to right common carotid artery ligation followed by 2.5 h hypoxia. Recombinant human Adiponectin (rh-Adiponectin) was administered intranasally 1 h post HI...
February 24, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29485733/globular-adiponectin-acts-as-a-melanogenic-signal-in-human-epidermal-melanocytes
#13
Y Kim, J Y Cho, S W Oh, M Kang, S E Lee, E Jung, Y S Park, J Lee
BACKGROUND: Adiponectin is an adipocyte-derived cytokine which circulates as a full-length protein and a fragment containing the globular domain of adiponectin (gAd). A recent study has reported the anti-melanogenic effects of full-length adiponectin. OBJECTIVES: To examine the involvement of gAd in melanogenesis and its action mechanisms. METHODS: The effects of gAd on melanogenesis and its mechanism of action were investigated in human epidermal melanocytes and reconstructed epidermis, and they included the levels of melanin content, cellular tyrosinase activity, cAMP production and protein kinase A (PKA) activity, expression and phosphorylation of signaling molecules...
February 27, 2018: British Journal of Dermatology
https://www.readbyqxmd.com/read/29483192/alternative-splicing-variant-of-the-scaffold-protein-appl1-suppresses-hepatic-adiponectin-signaling-and-function
#14
Amanda K Galan-Davila, Jiyoon Ryu, Kun Dong, Yang Xiao, Zhe Dai, Deling Zhang, Zhi Li, Amanda M Dick, Kevin D Liu, Amrita Kamat, Min Lu, Qunfeng Dong, Feng Liu, Lily Q Dong
Adiponectin is an adipocyte-derived hormone with antidiabetic activities, which include increasing the sensitivity of cells to insulin. Adaptor protein containing pleckstrin homology domain, phosphotyrosine-binding domain, and leucine zipper motif (APPL1) stimulates adiponectin signaling and promotes adiponectin's insulin-sensitizing effects by binding to two adiponectin receptors, AdipoR1 and AdipoR2, and the insulin receptor. In the present study, we report on an alternative splicing variant of APPL1 (APPL1sv) that is highly expressed in mouse liver, pancreas, and spleen tissues...
February 26, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29479319/high-fat-diet-attenuates-the-anticontractile-activity-of-aortic-pvat-via-a-mechanism-involving-ampk-and-reduced-adiponectin-secretion
#15
Tarek A M Almabrouk, Anna D White, Azizah B Ugusman, Dominik S Skiba, Omar J Katwan, Husam Alganga, Tomasz J Guzik, Rhian M Touyz, Ian P Salt, Simon Kennedy
Background and aim: Perivascular adipose tissue (PVAT) positively regulates vascular function through production of factors such as adiponectin but this effect is attenuated in obesity. The enzyme AMP-activated protein kinase (AMPK) is present in PVAT and is implicated in mediating the vascular effects of adiponectin. In this study, we investigated the effect of an obesogenic high fat diet (HFD) on aortic PVAT and whether any changes involved AMPK. Methods: Wild type Sv129 (WT) and AMPKα1 knockout (KO) mice aged 8 weeks were fed normal diet (ND) or HFD (42% kcal fat) for 12 weeks...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29472605/dehp-deregulates-adipokine-levels-and-impairs-fatty-acid-storage-in-human-sgbs-adipocytes
#16
Kristina Schaedlich, Scarlett Gebauer, Luise Hunger, Laura-Sophie Beier, Holger M Koch, Martin Wabitsch, Bernd Fischer, Jana Ernst
DEHP is a plasticizer which has been used in plastic products of everyday use for decades. Studies in mice and murine cell culture models identified DEHP as an endocrine disruptor that may also act as an obesogen. As this is of high concern in respect of the worldwide obesity epidemic, our aim is the translation of these findings into a human model system. On the basis of DOHaD, we investigated the influence of an environmentally relevant dose of DEHP [50 µg/ml] on adipogenesis in the human cell culture model SGBS...
February 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29462574/adiponectin-receptor-agonist-adiporon-decreased-ceramide-and-lipotoxicity-and-ameliorated-diabetic-nephropathy
#17
Sun Ryoung Choi, Ji Hee Lim, Min Young Kim, Eun Nim Kim, Yaeni Kim, Beom Soon Choi, Yong-Soo Kim, Hye Won Kim, Kyung-Min Lim, Min Jeong Kim, Cheol Whee Park
BACKGROUND: Adiponectin is known to take part in the regulation of energy metabolism. AdipoRon, an orally-active synthetic adiponectin agonist, binds to both adiponectin receptors (AdipoR)1/R2 and ameliorates diabetic complications. Among the lipid metabolites, the ceramide subspecies of sphingolipids have been linked to features of lipotoxicity, including inflammation, cell death, and insulin resistance. We investigated the role of AdipoRon in the prevention and development of type 2 diabetic nephropathy...
February 17, 2018: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29447962/low-molecular-weight-fucoidan-attenuates-liver-injury-via-sirt1-ampk-pgc1%C3%AE-axis-in-db-db-mice
#18
Yuanyuan Zheng, Tiantian Liu, Zhiqiang Wang, Yang Xu, Quanbin Zhang, Dali Luo
Non-alcoholic fatty-liver disease (NAFLD), caused by elevated hepatic lipids, inflammation and oxidative stress, is the most common liver disease globally. Low molecular weight fucoidan (LMWF), a sulfated polysaccharide extracted from brown seaweeds, has shown strong anti-inflammatory and antioxidant activities, which has not been explored in diabetes-induced NAFLD. Therefore, the present study sought to determine whether LMWF protects obese diabetic db/db mice against NAFLD. Results showed LMWF administration decreased plasma level of alanine aminotransferase, aspartate aminotransferase, total cholesterol, and triglyceride, as well as alleviated hepatic accumulation of triglyceride and total cholesterol in db/db mice...
February 12, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29429367/obestatin-protects-and-reverses-nonalcoholic-fatty-liver-disease-and-its-associated-insulin-resistance-in-rats-via-inhibition-of-food-intake-enhancing-hepatic-adiponectin-signaling-and-blocking-ghrelin-acylation
#19
Eman F Khaleel, Ghada A Abdel-Aleem
This study investigated the ameliorative and protective effects of long-term obestatin administration (80 nmol/kg/ intraperitoneal injection (i.p.)) on the pathogenesis of high-fat diet (HFD) induced nonalcoholic fatty liver disease (NAFLD) in rats. Rats (n = 8/group) were divided as control, NAFLD, NAFLD + Simvastatin, NAFLD + obestatin, NAFLD then obestatin, and obestatin then NAFLD. Obestatin co -or post-therapy significantly reduced hepatomegaly and reversed hyperlipidemia, hepatic lipid accumulation, and insulin resistance (IR)...
February 10, 2018: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29377113/lga-newborn-from-patients-with-pregestational-obesity-present-reduced-adiponectin-mediated-vascular-relaxation-and-endothelial-dysfunction-in-fetoplacental-arteries
#20
E C Muñoz-Muñoz, B J Krause, R Uauy, P Casanello
Maternal obesity is associated with large-for-gestational-age (LGA) neonates and programming of obesity-related cardiovascular disease in the offspring, however, the mechanisms that lead to the later are unclear. Presently, interpretations of NO-dependent changes in vascular function in LGA newborn from obese mothers are conflicting. Adiponectin improves endothelial function by increasing eNOS activity and NO production. We propose that LGAs from obese mothers present a diminished vascular response to adiponectin; thus, affecting eNOS and AMPK activation...
January 27, 2018: Journal of Cellular Physiology
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