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https://www.readbyqxmd.com/read/28231490/lipid-droplet-growth-regulation-of-a-dynamic-organelle
#1
REVIEW
David Barneda, Mark Christian
Intracellular lipid droplets (LDs) are remarkably dynamic and complex organelles that enact regulated storage and release of lipids to fulfil their fundamental roles in energy metabolism, membrane synthesis and provision of lipid-derived signaling molecules. Although small LDs are observed in all types of eukaryotic cells, it is adipocytes that present the widest range of sizes up to the massive unilocular droplet of a white adipocyte. Our knowledge of the proteins and associated processes that control LD dynamics is improving...
February 20, 2017: Current Opinion in Cell Biology
https://www.readbyqxmd.com/read/28231178/stimulatory-effects-of-cinnamon-extract-cinnamomum-cassia-during-the-initiation-stage-of-3t3-l1-adipocyte-differentiation
#2
Sang Gil Lee, Joanna A Siaw, Hye Won Kang
Cinnamon (Cinnamomum cassia) has an anti-diabetic effect by possibly increasing the lipid storage capacity of white adipocytes; however, this effect remains controversial. The aim of this study was to examine which stage of adipogenesis is critical for the stimulatory effect of cinnamon in adipogenesis using 3T3-L1 cells. Cells were treated with cinnamon extract during three different stages of adipogenesis. We found that genes related to adipogenesis and lipogenesis were enhanced when cinnamon extract was administered during the initiation stage of differentiation but not when administered during the preadipocyte and post stages of differentiation...
December 6, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28229424/three-dimensional-printed-scaffolds-with-multipotent-mesenchymal-stromal-cells-for-rabbit-mandibular-reconstruction-and-engineering
#3
Dongdong Fang, Michael Roskies, Mohamed-Nur Abdallah, Mohammed Bakkar, Jack Jordan, Li-Chieh Lin, Faleh Tamimi, Simon D Tran
Multipotent mesenchymal stromal cells (MSC) derived from both the bone marrow and adipose tissue possess the ability to differentiate into multiple cell lineages, regulate the immune function by secreting numerous bioactive paracrine factors, and hold great potential in cell therapy and tissue engineering. When combined with three-dimensional (3D) scaffolds, MSC can be used for bone defect reconstruction and engineering. This protocol describes the isolation of bone marrow mesenchymal stromal cells (BMMSC) and adipose-tissue derived stem cells (ADSC) from rabbits for subsequent seeding on tissue-engineered 3D-printed scaffolds and transplantation into a rabbit-model with the goal of repairing large osseous mandibular defects (one quarter of the lower jaw is removed surgically)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28229417/a-simplified-and-systematic-method-to-isolate-culture-and-characterize-multiple-types-of-human-dental-stem-cells-from-a-single-tooth
#4
Mohammed Bakkar, Younan Liu, Dongdong Fang, Camille Stegen, Xinyun Su, Murali Ramamoorthi, Li-Chieh Lin, Takako Kawasaki, Nicholas Makhoul, Huan Pham, Yoshinori Sumita, Simon D Tran
This chapter describes a simplified method that allows the systematic isolation of multiple types of dental stem cells such as dental pulp stem cells (DPSC), periodontal ligament stem cells (PDLSC), and stem cells of the apical papilla (SCAP) from a single tooth. Of specific interest is the modified laboratory approach to harvest/retrieve the dental pulp tissue by minimizing trauma to DPSC by continuous irrigation, reduction of frictional heat from the bur rotation, and reduction of the bur contact time with the dentin...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28229385/early-pregnancy-biochemical-predictors-of-gestational-diabetes-mellitus
#5
REVIEW
Camille E Powe
PURPOSE OF REVIEW: Universal oral glucose tolerance-based screening is employed to identify pregnant women with gestational diabetes mellitus (GDM), as treatment of this condition decreases the risk of associated complications. A simple and accurate blood test which identifies women at low or high risk for GDM in the first trimester would have the potential to decrease costs and improve outcomes through prevention or treatment. This review summarizes published data on early pregnancy biomarkers which have been tested as predictors of GDM...
February 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28229360/thyroid-hormone-acting-via-tr%C3%AE-induces-expression-of-browning-genes-in-mouse-bone-marrow-adipose-tissue
#6
Richard C Lindsey, Subburaman Mohan
PURPOSE: Mutant hypothyroid mouse models have recently shown that thyroid hormone is critical for skeletal development during an important prepubertal growth period. Additionally, thyroid hormone negatively regulates total body fat, consistent with the well-established effects of thyroid hormone on energy and fat metabolism. Since bone marrow mesenchymal stromal cells differentiate into both adipocytes and osteoblasts and a relationship between bone marrow adipogenesis and osteogenesis has been predicted, we hypothesized thyroid hormone deficiency during the postnatal growth period increases marrow adiposity in mice...
February 22, 2017: Endocrine
https://www.readbyqxmd.com/read/28229265/low-vitamin-d-status-and-obesity-role-of-nutritionist
#7
REVIEW
Silvia Savastano, Luigi Barrea, Maria Cristina Savanelli, Francesca Nappi, Carolina Di Somma, Francesco Orio, Annamaria Colao
Low vitamin D status and obesity have concomitantly reached epidemic levels worldwide. Up to now the direction of the association between low vitamin D status and obesity, the exact mechanisms responsible for this association and the clinical usefulness to increase vitamin D status for reducing adiposity still warrant further evaluation. The aim of the present review was to examine the current evidence linking low vitamin D status and obesity in relation to the role of the nutritionist. On the one side, considering obesity as a causal factor, low sun exposure in obese individuals due to their sedentary lifestyle and less outdoor activity, vitamin D sequestration in adipose tissue, and volumetric dilution of ingested or cutaneously synthesized vitamin D3 in the large fat mass of obese patients, might represent some of the factors playing a major role in the pathogenesis of the low vitamin D status...
February 23, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28228728/perivascular-adipose-tissue-s-impact-on-norepinephrine-induced-contraction-of-mesenteric-resistance-arteries
#8
Nadia Ayala-Lopez, Janice M Thompson, Stephanie W Watts
Background: Perivascular adipose tissue (PVAT) can decrease vascular contraction to NE. We tested the hypothesis that metabolism and/or uptake of vasoactive amines by mesenteric PVAT (MPVAT) could affect NE-induced contraction of the mesenteric resistance arteries. Methods: Mesenteric resistance vessels (MRV) and MPVAT from male Sprague-Dawley rats were used. RT-PCR and Western blots were performed to detect amine metabolizing enzymes. The Amplex® Red Assay was used to quantify oxidase activity by detecting the oxidase reaction product H2O2 and the contribution of PVAT on the mesenteric arteries' contraction to NE was measured by myography...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28228651/adipokines-and-cardiovascular-disease-a-comprehensive-review
#9
Ales Smekal, Jan Vaclavik
Adipokines are peptides that signal the functional status of adipose tissue to the brain and other target organs. In adipose tissue dysfunction, adipokine secretion is altered, and this can contribute to a spectrum of obesity-associated conditions including cardiovascular disease. Some adipokines have anti-inflammatory and cardioprotective effects (omentin, apelin, adiponectin). Others are pro-inflammatory with negative impact on cardiovascular function (leptin, visfatin, resistin, adipocyte fatty-acid-binding protein)...
February 16, 2017: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/28228268/er-stress-protein-chop-mediates-insulin-resistance-by-modulating-adipose-tissue-macrophage-polarity
#10
Toru Suzuki, Junhong Gao, Yasushi Ishigaki, Keiichi Kondo, Shojiro Sawada, Tomohito Izumi, Kenji Uno, Keizo Kaneko, Sohei Tsukita, Kei Takahashi, Atsuko Asao, Naoto Ishii, Junta Imai, Tetsuya Yamada, Seiichi Oyadomari, Hideki Katagiri
Obesity represents chronic inflammatory states promoted by pro-inflammatory M1-macrophage infiltration into white adipose tissue (WAT), thereby inducing insulin resistance. Herein, we demonstrate the importance of an ER stress protein, CHOP, in determining adipose tissue macrophage (ATM) polarity and systemic insulin sensitivity. A high-fat diet (HFD) enhances ER stress with CHOP upregulation in adipocytes. CHOP deficiency prevents HFD-induced insulin resistance and glucose intolerance with ATM M2 predomination and Th2 cytokine upregulation in WAT...
February 21, 2017: Cell Reports
https://www.readbyqxmd.com/read/28228139/hmga2-immunostaining-is-a-straightforward-technique-which-helps-to-distinguish-pulmonary-fat-forming-lesions-from-normal-adipose-tissue-in-small-biopsies-a-retrospective-observational-study-about-a-series-of-13-lung-biopsies
#11
Nicolas Piton, Émilie Angot, Florent Marguet, Jean-Christophe Sabourin
BACKGROUND: A tracheobronchial lesion observed during an endoscopic examination is usually sampled by the pulmonologist and sent to the pathologist for microscopic examination. Adipocytes may be observed in the lamina propria of tracheobronchial biopsies, which may complicate diagnosis of sampled lesions because these adipose cells may be part of the lesion (lipoma or pulmonary hamartoma), but may also be a normal component of the bronchial mucosa. Because endoscopic samples frequently miss their target, adipocytes observed in such biopsies usually lead to uncertainty regarding diagnosis...
February 23, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28228098/anti-obesity-effect-of-ethanolic-extract-from-cosmos-caudatus-kunth-leaf-in-lean-rats-fed-a-high-fat-diet
#12
Hafeedza Abdul Rahman, Najla Gooda Sahib, Nazamid Saari, Faridah Abas, Amin Ismail, Muhammad Waseem Mumtaz, Azizah Abdul Hamid
BACKGROUND: Obesity is a major health concern both in developed and developing countries. The use of herbal medicines became the subject of interest for the management of obesity due to its natural origin, cost effectiveness and minimal side effects. The present study aimed at investigating anti-obesity potential of ethanolic extract from Cosmos caudatus Kunth leaf (EECCL). METHODS: In this study, the rats were randomly divided into six groups i.e., (1) Normal Diet (ND); (2) Normal Diet and 175 mg/kgBW of EECCL (ND + 175 mg/kgBW); (3) Normal Diet and 350 mg/kgBW of EECCL (ND + 350 mg/kgBW); (4) High Fat Diet (HFD); (5) High Fat Diet and 175 mg/kgBW of EECCL (HFD + 175 mg/kgBW); (6) High Fat Diet and 350 mg/kgBW of EECCL (HFD + 350 mg/kgBW)...
February 22, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28224267/selection-of-dna-aptamers-for-extra-cellular-domain-of-human-epidermal-growth-factor-receptor-2-to-detect-her2-positive-carcinomas
#13
A Sett, B B Borthakur, U Bora
BACKGROUND: Human epidermal growth factor receptor 2 (Her2, an orphan receptor of ErbB family) is considered as an important biomarker as it plays a key role in the development and progression of aggressive types of breast, ovarian, stomach and gastric cancer. In the present study, we developed novel DNA aptamers against the extra-cellular domain (ECD) of Her2 protein for detection of Her2-positive carcinomas. METHODS: We cloned and expressed Her2-ECD protein in E...
February 21, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28224035/colonic-intussusception-in-descending-colon-an-unusual-presentation-of-colon-lipoma
#14
Reza Bagherzadeh Saba, Amir Sadeghi, Neda Rad, Mohammad Taghi Safari, Farnoush Barzegar
Lipomas of the colon are relatively rare benign soft tissue tumors derived from mature adipocytes of mesenchymatic origin. During colonoscopy, surgery or autopsy they are generally discovered incidentally. Most cases are asymptomatic, with a small tumor size, and do not need any special treatment. However, in the cases with larger in size of tumor some symptoms such as anemia, abdominal pain, constipation, diarrhea, bleeding, or intussusception may be presented. We reported a 47-year-old woman with colonic intussusception in the descending colon caused by colonic lipoma and diagnosed after surgical exploration for obstructive colonic mass...
December 2016: Gastroenterology and Hepatology From Bed to Bench
https://www.readbyqxmd.com/read/28223294/the-%C3%AE-3-adrenergic-receptor-is-dispensable-for-browning-of-adipose-tissues
#15
Jasper M A de Jong, René T F Wouters, Nathalie Boulet, Barbara Cannon, Jan Nedergaard, Natasa Petrovic
Brown and brite/beige adipocytes are attractive therapeutic targets to treat metabolic diseases. To maximally utilize their functional potential, further understanding is required about their identities and their functional differences. Recent studies with β3-adrenergic receptor knockout mice reported that brite/beige adipocytes, but not classical brown adipocytes, require the β3-adrenergic receptor for cold-induced transcriptional activation of thermogenic genes. We aimed to further characterize this requirement of the β3-adrenergic receptor as a functional distinction between classical brown and brite/beige adipocytes...
February 21, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28222464/regulation-of-dipeptidyl-peptidase-4-its-substrate-chemokines-and-their-receptors-in-adipose-tissue-of-ob-ob-mice
#16
Jihoon Shin, Atsunori Fukuhara, Toshiharu Onodera, Chieko Yokoyama, Michio Otsuki, Iichiro Shimomura
The physiological function of DPP-4 in proteolytic inactivation of incretins has been well established, however, there is limited information on the expression and the significance of DPP-4 in white adipose tissue with regard to obesity. The objective of the work was to reveal the expression and regulation of DPP-4 in adipocytes and compare the expression and activity of DPP-4 in white adipose tissue and several other organs such as the liver, muscle and kidney. We also investigated the gene expression levels of DPP-4 substrate chemokines, and their receptors in white adipose tissue...
February 21, 2017: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/28222242/obesity-and-melanoma-could-fat-be-fueling-malignancy
#17
REVIEW
Emily Clement, Ikrame Lazar, Catherine Muller, Laurence Nieto
Over the last decade, it has become increasingly clear that adipose tissue, and particularly adipocytes, contribute to tumor progression. Obesity, an ever-increasing worldwide phenomenon, exacerbates this effect. The influence of obesity on melanoma remains poorly studied, although recent data does underline an association between the two diseases in both humans and murine models. Herein, we review the impact of obesity on melanoma incidence and progression and discuss the underlying mechanisms known to be involved...
February 21, 2017: Pigment Cell & Melanoma Research
https://www.readbyqxmd.com/read/28219719/cysteine-deprivation-prevents-induction-of-peroxisome-proliferator-activated-receptor-gamma-2-and-adipose-differentiation-of-3t3-l1-cells
#18
Nadia Nabil Haj-Yasein, Ole Berg, Fredrik Jernerén, Helga Refsum, Hilde I Nebb, Knut Tomas Dalen
Plasma cysteine is strongly associated with body fat mass in human cohorts and diets low in cysteine prevents fat accumulation in mice. It is unclear if plasma cysteine affects fat development or if fat accumulation raises plasma cysteine. To determine if cysteine affects adipogenesis, we differentiated 3T3-L1 preadipocytes in medium with reduced cysteine. Cells incubated in media with 10-20μM cysteine exhibited reduced capacity to differentiate into triacylglycerol-storing mature adipocytes compared with cells incubated with 50μM cysteine...
February 17, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28219710/unique-effect-of-4-hydroxyestradiol-and-its-methylation-metabolites-on-lipid-and-cholesterol-profiles-in-ovariectomized-female-rats
#19
Pan Wang, Bao-Ting Zhu
Animal studies have shown that endogenous estrogens such as 17β-estradiol (E2) can modulate lipid profiles in vivo, and this effect is generally thought to be mediated by the estrogen receptors (ERs). The present study sought to test a hypothesis that some of the endogenous estrogen metabolites that have very weak estrogenic activity may exert some of their modulating effects on lipid metabolism in an ER-independent manner. Using ovariectomized female rats as an in vivo model, we found that 4-hydroxyestradiol (4-OH-E2) has a markedly stronger effect in reducing the adipocyte size and serum cholesterol level in rats compared to E2, despite the weaker estrogenic activity of 4-OH-E2...
February 17, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28218988/toxicological-effects-during-and-following-persistent-insulin-induced-hypoglycaemia-in-healthy-euglycaemic-rats
#20
Vivi F H Jensen, Anne-Marie Mølck, Line O Berthelsen, Lene Alifrangis, Lene Andersen, Melissa Chapman, Jens Lykkesfeldt, Ingrid B Bøgh
New insulin analogues with a longer duration of action and a "peakless" pharmacokinetic profile have been developed to improve efficacy, safety and convenience for diabetic patients. During non-clinical development, according to regulatory guidelines, these analogues are tested in healthy euglycaemic rats rendering them persistently hypoglycaemic. Little is known about the effect of persistent (24 hr/day) insulin-induced hypoglycaemia (IIH) in rats, complicating interpretation of results in pre-clinical studies with new longer-acting insulin analogues...
February 20, 2017: Basic & Clinical Pharmacology & Toxicology
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