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Adipocyte macrophage

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https://www.readbyqxmd.com/read/28094778/adipocyte-fatty-acid-binding-protein-potentiates-toxic-lipids-induced-endoplasmic-reticulum-stress-in-macrophages-via-inhibition-of-janus-kinase-2-dependent-autophagy
#1
Ruby L C Hoo, Lingling Shu, Kenneth K Y Cheng, Xiaoping Wu, Boya Liao, Donghai Wu, Zhiguang Zhou, Aimin Xu
Lipotoxicity is implicated in the pathogenesis of obesity-related inflammatory complications by promoting macrophage infiltration and activation. Endoplasmic reticulum (ER) stress and adipocyte fatty acid binding protein (A-FABP) play key roles in obesity and mediate inflammatory activity through similar signaling pathways. However, little is known about their interplay in lipid-induced inflammatory responses. Here, we showed that prolonged treatment of palmitic acid (PA) increased ER stress and expression of A-FABP, which was accompanied by reduced autophagic flux in macrophages...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28093994/viral-infection-and-obesity-current-status-and-future-prospective
#2
Sayed Sartaj Sohrab, Mohammad Amjad Kamal, Richard L Atkinson, Maha M Alawi, Esam I Azhar
The association of pathogenic viruses with obesity has now been well-known in both human and animals. Globally, human obesity has become a serious problem leading to the emergence of multiple life-threatening diseases. Adenoviruses contribute a significant role in the induction of obesity by affecting various pathways. Due to impaired immunity, obese individuals are more prone to nosocomial infections leading to complications of obesity. In contrast, several other important factors contributing to human obesity are known...
January 16, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28089867/attenuation-of-obesity-induced-inflammation-in-mice-orally-administered-with-salmon-cartilage-proteoglycan-a-prophylactic-agent
#3
Shouhei Hirose, Krisana Asano, Akio Nakane
Obesity is associated with chronic inflammation of adipose tissue and causes development of type 2 diabetes. M1 macrophage population was increased in adipose tissue of obese mouse. M1 macrophages induce insulin resistance through the secretion of proinflammatory cytokines. Our previous studies demonstrated that salmon cartilage proteoglycan (PG) suppresses excess inflammation in various mouse inflammatory diseases. In this study, we examined the effect of PG on type 2 diabetes using high-fat-diet (HFD) induced obese mouse model...
January 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28070318/piceatannol-exhibits-anti-inflammatory-effects-on-macrophages-interacting-with-adipocytes
#4
Takayuki Yamamoto, Yongjia Li, Yuki Hanafusa, Yu-Sheng Yeh, Hiroko Maruki-Uchida, Shinpei Kawakami, Masahiko Sai, Tsuyoshi Goto, Tatsuhiko Ito, Teruo Kawada
Piceatannol (PIC), a natural analog of resveratrol (RES), is a phytochemical found in passion fruit seeds. To clarify the effects of PIC on obesity-induced inflammation in adipose tissue, we investigated the anti-inflammatory activity of PIC-related compounds (PIC, RES, and metabolites from PIC) in culture models of obese adipose tissue. Lipopolysaccharide (LPS) and conditioned medium from 3T3-L1 adipocytes (3T3-L1-CM) enhanced proinflammatory gene expression and synthesis of nitric oxide (NO), tumor necrosis factor-α (TNF-α), and interleukin-6 (IL-6) in RAW264...
January 2017: Food Science & Nutrition
https://www.readbyqxmd.com/read/28069536/m2-macrophages-infusion-ameliorates-obesity-and-insulin-resistance-by-remodeling-inflammatory-macrophages-homeostasis-in-obese-mice
#5
Qi Zhang, Haojie Hao, Zongyan Xie, Yu Cheng, Yaqi Yin, Min Xie, Hong Huang, Jieqing Gao, Hongyu Liu, Chuan Tong, Li Zang, Yiming Mu, Weidong Han
OBJECTIVE: The role of M2 macrophages infusion in dealing with obesity is still little known. In this study, the therapeutic effects of M2 macrophages infusion were investigated. METHODS: High fat diet (HFD) was used to induce obesity in C57BL/6N mice. 5 × 10(5) M2 macrophages, derived from the bone marrow, were injected into obese mice through the tail vein twice with an interval of one week. RESULTS: One week after the second injection, weight of inguinal adipose pad was significantly decreased...
January 6, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28063251/perivascular-adipose-tissue-inflammation-in-vascular-disease
#6
REVIEW
Ryszard Nosalski, Tomasz J Guzik
Perivascular adipose tissue (PVAT) plays a critical role in the pathogenesis of cardiovascular disease. In vascular pathologies perivascular adipose tissue increases in volume and becomes dysfunctional, with altered cellular composition and molecular characteristics. PVAT dysfunction is characterized by its inflammatory character, oxidative stress, diminished production of vaso-protective adipocyte derived relaxing factors (ADRFs) and increased production of paracrine factors such as resistin, leptin, cytokines (IL-6, TNF-α) and chemokines (RANTES, MCP-1)...
January 7, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28062496/adipocyte-specific-deficiency-of-nadph-oxidase-4-delays-the-onset-of-insulin-resistance-and-attenuates-adipose-tissue-inflammation-in-obesity
#7
Laura J Den Hartigh, Mohamed Omer, Leela Goodspeed, Shari Wang, Tomasz Wietecha, Kevin D O'Brien, Chang Yeop Han
OBJECTIVE: Obesity is associated with insulin resistance and adipose tissue inflammation. Reactive oxygen species (ROS) increase in adipose tissue during the development of obesity. We previously showed that in response to excess nutrients like glucose and palmitate, adipocytes generated ROS via NADPH oxidase (NOX) 4, the major adipocyte isoform, instead of using mitochondrial oxidation. However, the role of NOX4-derived ROS in the development of whole body insulin resistance, adipocyte inflammation, and recruitment of macrophages to adipose tissue during the development of obesity is unknown...
December 29, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28062181/epicatechin-downregulates-adipose-tissue-ccl19-expression-and-thereby-ameliorates-diet-induced-obesity-and-insulin-resistance
#8
T Sano, S Nagayasu, S Suzuki, M Iwashita, A Yamashita, T Shinjo, T Sanui, A Kushiyama, T Kanematsu, T Asano, F Nishimura
BACKGROUND AND AIMS: Epicatechin (EC) intake has been suggested to be beneficial for the prevention of cardiovascular disorders, and it is well known that adipose tissue inflammation is one of the major risk factors for coronary heart diseases. The purpose of the present study was to determine the in vitro and in vivo effects of EC on adipose tissue inflammation and obesity. METHODS AND RESULTS: DNA microarray analysis was performed to evaluate the effects of EC on gene expression in adipocytes co-cultured with bacterial endotoxin-stimulated macrophages...
November 23, 2016: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/28056748/pro-inflammation-cytokines-new-potential-therapeutic-targets-for-obesity-related-bone-disorders
#9
Tian Tian Wang, Chenglin Qi He, Xi Jie Yu
Obesity was traditionally thought as a positive regulator on the strength of bone. With the in-depth study, obesity is considered as a major risk factor for osteoporosis. Some pro-inflammation cytokines such as tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6) are the factors that fat uses to negatively regulate bone metabolism. Obese people and animals show a higher level of serum TNF-α and IL-6, which are produced by macrophages derived from adipose tissue. These pro-inflammation cytokines regulate the proliferation and apoptosis of adipocyte, promote lipolysis, inhibit lipid synthesis and decrease blood lipids through autocrine and paracrine way...
January 4, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28052562/caspase-1-promotes-monocyte-macrophage-differentiation-by-repressing-ppar%C3%AE
#10
Zhiyuan Niu, Jiajin Tang, Wenlong Zhang, Yongjun Chen, Yahong Huang, Bing Chen, Jiahong Li, Pingping Shen
Monocyte-to-macrophage differentiation is tightly controlled in vivo, as disruption of the normal differentiation program can lead to diverse disorders. Caspase-1, the first identified member of the caspase family, regulates differentiation in various cell types such as Th17 cells and adipocytes. However, the contribution of caspase-1 in monocyte-macrophage differentiation remains elusive. Here we report that caspase-1 is significantly downregulated in leukaemia cells from patients with acute monocytic leukaemia...
January 4, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28051918/genetic-variation-in-fabp4-and-evaluation-of-its-effects-on-beef-cattle-fat-content
#11
Daniel E Goszczynski, Juliana Papaleo-Mazzucco, María V Ripoli, Edgardo L Villarreal, Andrés Rogberg-Muñoz, Carlos A Mezzadra, Lilia M Melucci, Guillermo Giovambattista
FABP4 is a protein primarily expressed in adipocytes and macrophages that plays a key role in fatty acid trafficking and lipid hydrolysis. FABP4 gene polymorphisms have been associated with meat quality traits in cattle, mostly in Asian breeds under feedlot conditions. The objectives of this work were to characterize FABP4 genetic variation in several worldwide cattle breeds and evaluate possible genotype effects on fat content in a pasture-fed crossbred (Angus-Hereford-Limousin) population. We re-sequenced 43 unrelated animals from nine cattle breeds (Angus, Brahman, Creole, Hereford, Holstein, Limousin, Nelore, Shorthorn, and Wagyu) and obtained 22 single nucleotide polymorphisms (SNPs) over 3,164 bp, including four novel polymorphisms...
January 4, 2017: Animal Biotechnology
https://www.readbyqxmd.com/read/28011892/adipose-type-i-interferon-signalling-protects-against-metabolic-dysfunction
#12
Verena Wieser, Timon Erik Adolph, Christoph Grander, Felix Grabherr, Barbara Enrich, Patrizia Moser, Alexander Rupert Moschen, Susanne Kaser, Herbert Tilg
OBJECTIVE: Low-grade chronic inflammation emerges as a potent driver of insulin resistance and glucose dysregulation in obesity and associated non-alcoholic fatty liver disease (NAFLD). The liver, subcutaneous fat and the immune system participate in disturbances of metabolism. Type I interferon (IFN) signalling initiated by innate and adaptive immunity modulates inflammatory responses consequent to infection. However, little is known about the role of type I IFN signalling in metabolic diseases and the development of NAFLD...
December 23, 2016: Gut
https://www.readbyqxmd.com/read/28000916/pathological-changes-of-adipose-tissue-in-secondary-lymphedema
#13
K Tashiro, J Feng, S-H Wu, T Mashiko, K Kanayama, M Narushima, H Uda, S Miyamoto, I Koshima, K Yoshimura
BACKGROUND: The pathophysiology of lymphedema is poorly understood. Current treatment options include compression therapy, resection, liposuction, and lymphatic microsurgery, but determining the optimal treatment approach for each patient remains challenging. OBJECTIVES: We characterized skin and adipose tissue alterations in the setting of secondary lymphedema. METHODS: Morphologic and histopathologic evaluations were conducted for 70 specimens collected from 26 female patients with lower extremity secondary lymphedema following surgical intervention for gynecologic cancers...
December 21, 2016: British Journal of Dermatology
https://www.readbyqxmd.com/read/27997051/association-of-adipocyte-enhancer-binding-protein-1-with-alzheimer-s-disease-pathology-in-human-hippocampi
#14
Masahiro Shijo, Hiroyuki Honda, Satoshi O Suzuki, Hideomi Hamasaki, Masaaki Hokama, Nona Abolhassani, Yusaku Nakabeppu, Toshiharu Ninomiya, Takanari Kitazono, Toru Iwaki
Adipocyte enhancer binding protein 1 (AEBP1) activates inflammatory responses via the NF-κB pathway in macrophages and regulates adipogenesis in preadipocytes. Up-regulation of AEBP1 in the hippocampi of patients with Alzheimer's disease (AD) has been revealed by microarray analyses of autopsied brains from the Japanese general population (the Hisayama study). In this study, we compared the expression patterns of AEBP1 in normal and AD brains, including in the hippocampus, using immunohistochemistry. The subjects were 24 AD cases and 52 non-AD cases...
December 20, 2016: Brain Pathology
https://www.readbyqxmd.com/read/27990393/subcutaneous-panniculitis-like-t-cell-lymphoma-with-macrophage-activation-syndrome-treated-by-cyclosporine-and-prednisolone
#15
Dinesh P Asati, Vaibhav Ingle, Deepti Joshi, Anurag Tiwari
Subcutaneous panniculitis-like T-cell lymphoma (SPTCL; α/β T-cell subtype) is a distinct variantof cutaneous T-cell lymphomas, which presents as inflammatory subcutaneous nodules. A 17-year-old male presented with recurrent fever with concomitant facial swelling, pedal edema, hepatosplenomegaly, and mildly tender subcutaneous plaques in generalized distribution along with patches of scarring alopecia on scalp. There were features of macrophage activation syndrome in the form of hemophagocytosis in the bone marrow, pancytopenia, high serum lactate dehydrogenase levels, low fibrinogen clotting activity, prolonged activated prothrombine time (aPTT), increased serum ferritin, hypoalbuminemia, and hypertriglyceridemia...
November 2016: Indian Dermatology Online Journal
https://www.readbyqxmd.com/read/27983705/riboflavin-reduces-pro-inflammatory-activation-of-adipocyte-macrophage-co-culture-potential-application-of-vitamin-b2-enrichment-for-attenuation-of-insulin-resistance-and-metabolic-syndrome-development
#16
Agnieszka Irena Mazur-Bialy, Ewa Pocheć
Due to the progressive increase in the incidence of obese and overweight individuals, cardiometabolic syndrome has become a worldwide pandemic in recent years. Given the immunomodulatory properties of riboflavin, the current study was performed to investigate the potency of riboflavin in reducing obesity-related inflammation, which is the main cause of insulin resistance, diabetes mellitus 2 or arteriosclerosis. We determined whether pretreatment with a low dose of riboflavin (10.4-1000 nM) affected the pro-inflammatory activity of adipocyte-macrophage co-culture (3T3 L1-RAW 264...
December 15, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27983683/lunasin-attenuates-obesity-associated-metastasis-of-4t1-breast-cancer-cell-through-anti-inflammatory-property
#17
Chia-Chien Hsieh, Chih-Hsuan Wang, Yu-Shan Huang
Obesity prevalence is increasing worldwide and is accompanied by low-grade inflammation with macrophage infiltration, which is linked with a poorer breast cancer prognosis. Lunasin is a natural seed peptide with chemopreventive properties and multiple bioactivities. This is the first study to explore the chemopreventive effects of lunasin in the obesity-related breast cancer condition using 4T1 breast cancer cells, 3T3-L1 adipocytes, and conditioned media. An obesity-related environment, such as leptin-treatment or adipocyte-conditioned medium (Ad-CM), promoted 4T1 cell proliferation and metastasis...
December 15, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27974594/complement-mediated-inhibition-of-adiponectin-regulates-perivascular-inflammation-and-vascular-injury-in-hypertension
#18
Cheng-Chao Ruan, Yu Ma, Qian Ge, Yan Li, Li-Min Zhu, Ying Zhang, Ling-Ran Kong, Qi-Hong Wu, Fanghong Li, Lixian Cheng, Allan Z Zhao, Ding-Liang Zhu, Ping-Jin Gao
Perivascular adipose tissue (PVAT)-derived adiponectin (APN) is a secreted adipokine that protects against hypertension-related cardiovascular injury. However, the regulation of APN expression in hypertension remains to be explored. In this study, we demonstrated that down-regulation of APN was associated with complement activation in the PVAT of desoxycorticosterone acetate (DOCA)-salt hypertensive mice. Complement 3-deficient hypertensive mice were protected from ANP decrease in the PVAT. APN deficiency blockaded the protective effects of complement inhibition against hypertensive vascular injury...
December 14, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27960291/inhibitory-effect-of-methyl-2-4-methoxy-4-oxobutanamide-benzoate-from-jerusalem-artichoke-helianthus-tuberosus-on-the-inflammatory-paracrine-loop-between-macrophages-and-adipocytes
#19
Yun Joo Jung, Byung Oh Kim, Jong Hwan Kwak, Suhkneung Pyo
The interaction between macrophages and adipocytes is known to aggravate inflammation of the adipose tissue, leading to decreased insulin sensitivity. Hence, attenuation of the inflammatory paracrine loop between macrophages and adipocytes is deemed essential to ameliorate insulin resistance and diabetes mellitus type 2. Methyl 2-(4'-methoxy-4'-oxobutanamide) benzoate (compound 1), a newly isolated compound from Jerusalem srtichoke (JA), has not been biologically characterized yet. Here, we investigated whether JA-derived compound 1 attenuates the inflammatory cycle between RAW 264...
December 14, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27959437/traditional-medicine-sobokchukeo%C3%A2-tang-modulates-the-inflammatory-response-in-adipocytes-and-macrophages
#20
Hoyoung Lee, Eun Hyoung Shim, Myeong Soo Lee, Chang-Seon Myung
Sobokchukeo-Tang (ST) is a well-known formula that is used for treating primary dysmenorrhea caused by blood stasis syndrome (BSS) in Korea and China. The current study investigated the anti‑inflammatory and anti‑adipogenesis effects of ST on adipocytes and macrophages. The anti‑inflammatory efficacy of ST was evaluated in RAW 264.7 cells and differentiated THP‑1 cells. To induce inflammation, the cells were treated with lipopolysaccharide (LPS; 1 µg/ml). Following the induction of inflammation, the levels of proinflammatory cytokines, interleukin‑6 (IL‑6) and tumor necrosis factor‑α (TNF‑α) in the cell supernatant were detected using enzyme‑linked immunosorbent assay...
January 2017: Molecular Medicine Reports
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