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https://www.readbyqxmd.com/read/28231275/suppression-of-tgf-%C3%AE-pathway-by-pirfenidone-decreases-extracellular-matrix-deposition-in-ocular-fibroblasts-in-vitro
#1
Thomas Stahnke, Bhavani S Kowtharapu, Oliver Stachs, Klaus-Peter Schmitz, Johannes Wurm, Andreas Wree, Rudolf Friedrich Guthoff, Marina Hovakimyan
In glaucoma surgery, fibrotic processes occur, leading to impairment of liquid outflow. Activated fibroblasts are responsible for postoperative scarring. The transforming growth factor-β (TGF-β) pathway plays a key role in fibroblast function, differentiation and proliferation. The aim of this study was the characterization of the fibrotic potential of two subtypes of primary human ocular fibroblasts and the attempt to inhibit fibrotic processes specifically, without impairing cell viability. For fibrosis inhibition we focused on the small molecule pirfenidone, which has been shown to prevent pulmonary fibrosis by the decrease of the expression of TGF-β1, TGF-β2 and TGF-β3 cytokines...
2017: PloS One
https://www.readbyqxmd.com/read/28230532/optimization-of-volumetric-breast-density-estimation-in-digital-mammograms
#2
Katharina Holland, Albert Gubern-Merida, Ritse Mann, Nico Karssemeijer
Fibroglandular tissue volume and percent density can be estimated in unprocessed mammograms using a physics-based method, which relies on an internal reference value representing the projection of fat only. However, pixels representing fat only may not be present in dense breasts, causing an underestimation of density measurements. In this work, we investigate alternative approaches for obtaining a tissue reference value to improve density estimations, particularly in dense breasts. Two of three investigated reference values (F1, F2) are percentiles of the pixel value distribution in the breast interior (the contact area of breast and compression paddle)...
February 23, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28230074/lack-of-resistance-development-in-bemisia-tabaci-to-isaria-fumosorosea-after-multiple-generations-of-selection
#3
Tianni Gao, Zhaolei Wang, Yü Huang, Nemat O Keyhani, Zhen Huang
The emergence of insecticide resistant insect pests is of significant concern worldwide. The whitefly, Bemisia tabaci, is an important agricultural pest and has shown incredible resilience developing resistance to a number of chemical pesticides. Entomopathogenic fungi such as Isaria fumosorosea offer an attractive alternative to chemical pesticides for insect control, and this fungus has been shown to be an effective pathogen of B. tabaci. Little is known concerning the potential for the development of resistance to I...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229629/protective-effect-of-crocin-and-voluntary-exercise-against-oxidative-stress-in-the-heart-of-high-fat-diet-induced-type-2-diabetic-rats
#4
V Ghorbanzadeh, M Mohammadi, G Mohaddes, H Dariushnejad, L Chodari, S Mohammadi
Background Oxidative stress plays a critical role in the pathogenesis and progression of type 2 diabetes and diabetic-associated cardiovascular complications. This study investigated the impact of crocin combined with voluntary exercise on heart oxidative stress indicator in high-fat diet-induced type 2 diabetic rats. Materials and methods Rats were divided into four groups: diabetes, diabetic-crocin, diabetic-voluntary exercise, diabetic-crocin-voluntary exercise. Type 2 diabetes was induced by high-fat diet (4 weeks) and injection of streptozotocin (intraperitoneally, 35 mg/kg)...
December 2016: Physiol Int
https://www.readbyqxmd.com/read/28229360/thyroid-hormone-acting-via-tr%C3%AE-induces-expression-of-browning-genes-in-mouse-bone-marrow-adipose-tissue
#5
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/28229358/postmastectomy-radiation-therapy-and-breast-reconstruction-with-autologous-tissue
#6
Yasunobu Terao, Koichiro Taniguchi, Miwako Fujii, So Moriyama
Immediate breast reconstruction is an important tool for patients to accept and overcome their breast cancer, as well as for cosmetic reasons. However, its use in patients who require postmastectomy radiation therapy (PMRT) is not yet clear. The purpose of this study was to analyze the effects of PMRT and reconstruction on each other. The time of initiation of PMRT, the prognosis, and the cosmetic results were investigated in patients who underwent immediate reconstruction using autologous tissue. In the case of delayed reconstruction using autologous tissue after PMRT, radiation damage of the chest skin, design of the flap, and cosmetic results were investigated...
February 22, 2017: Breast Cancer: the Journal of the Japanese Breast Cancer Society
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/28228829/hepatic-iron-storage-is-related-to-body-adiposity-and-hepatic-inflammation
#8
Chan Yoon Park, Jayong Chung, Kyung-Ok Koo, Min Soo Kim, Sung Nim Han
BACKGROUND: Obesity has been reported to be associated with iron deficiency. However, few studies have investigated iron status in low adiposity. To investigate whether body adiposity was associated with altered hepatic iron status, we compared liver iron levels and markers involved in inflammation and iron absorption in obese, control, and mildly calorie restricted mice. METHODS: Seven week old C57BL/6 mice were fed control (10% kcal fat, Control) or high fat (60% kcal fat, HFD) diets, or reduced amount of control diet to achieve 15% calorie restriction (CR) for 16 weeks...
2017: Nutrition & Metabolism
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/28228283/adipose-type-one-innate-lymphoid-cells-regulate-macrophage-homeostasis-through-targeted-cytotoxicity
#10
Selma Boulenouar, Xavier Michelet, Danielle Duquette, David Alvarez, Andrew E Hogan, Christina Dold, Donal O'Connor, Suzanne Stutte, Ali Tavakkoli, Desmond Winters, Mark A Exley, Donal O'Shea, Michael B Brenner, Ulrich von Andrian, Lydia Lynch
Adipose tissue has a dynamic immune system that adapts to changes in diet and maintains homeostatic tissue remodeling. Adipose type 1 innate lymphoid cells (AT1-ILCs) promote pro-inflammatory macrophages in obesity, but little is known about their functions at steady state. Here we found that human and murine adipose tissue harbor heterogeneous populations of AT1-ILCs. Experiments using parabiotic mice fed a high-fat diet (HFD) showed differential trafficking of AT1-ILCs, particularly in response to short- and long-term HFD and diet restriction...
February 21, 2017: Immunity
https://www.readbyqxmd.com/read/28228274/killer-ilcs-in-the-fat
#11
Emilie Narni-Mancinelli, Eric Vivier
Innate lymphoid cells (ILCs) residing in adipose tissue participate in the pathogenesis of obesity, but their contribution toward adipose tissue homeostasis in the lean state is unclear. Boulenouar et al. (2017) now report that heterogenous type 1 ILCs in adipose tissues regulate macrophage homeostasis through cytotoxicity.
February 21, 2017: Immunity
https://www.readbyqxmd.com/read/28228268/er-stress-protein-chop-mediates-insulin-resistance-by-modulating-adipose-tissue-macrophage-polarity
#12
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/28228181/characterization-and-functional-analysis-of-serpin-1-like-gene-from-oak-silkworm-antheraea-pernyi
#13
H M Yu, B J Zhu, Y Sun, G Q Wei, L Wang, C Qian, M Nadeem Abbas, C L Liu
Serpins are a broadly distributed family of proteases found in various organisms that play an important role in regulating the immune response. Here, we identified a serpin-1 gene from Antheraea pernyi that encodes a 279 amino acid protein with a molecular weight of 30.8 kDa. We expressed the recombinant Ap-serpin-1 protein in Escherichia coli and used the purified protein to prepare rabbit anti-Ap-serpin-1 polyclonal antibodies. We calculated the enzyme-linked immunosorbent assay titer of the antibody as 1:128000...
February 23, 2017: Bulletin of Entomological Research
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
#14
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/28228009/emergency-ultrasonography-of-the-gastrointestinal-tract-of-children
#15
Jae-Yeon Hwang
Ultrasonography (US) is widely used to evaluate most body parts in pediatric patients because it is simple, noninvasive, easy to use, and applicable in a wide variety of clinical situations. US is the modality of choice for the initial evaluation of acute abdominal pain in pediatric patients because of their small body habitus and the presence of less fat tissue in the abdominal wall and peritoneal cavity. The most important factor in performing pediatric emergency US is the graded compression technique and selection of the proper transducer...
January 25, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28227791/nonlinear-3-d-simulation-of-high-intensity-focused-ultrasound-therapy-in-the-kidney
#16
Visa Suomi, Jiri Jaros, Bradley Treeby, Robin Cleveland, Visa Suomi, Jiri Jaros, Bradley Treeby, Robin Cleveland, Jiri Jaros, Bradley Treeby, Robin Cleveland, Visa Suomi
Kidney cancer is a severe disease which can be treated non-invasively using high-intensity focused ultrasound (HIFU) therapy. However, tissue in front of the transducer and the deep location of kidney can cause significant losses to the efficiency of the treatment. The effect of attenuation, refraction and reflection due to different tissue types on HIFU therapy of the kidney was studied using a nonlinear ultrasound simulation model. The geometry of the tissue was derived from a computed tomography (CT) dataset of a patient which had been segmented for water, bone, soft tissue, fat and kidney...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227692/current-distribution-in-tissues-with-conducted-electrical-weapons-operated-in-drive-stun-mode
#17
Dorin Panescu, Mark W Kroll, Michael Brave, Dorin Panescu, Mark W Kroll, Michael Brave, Dorin Panescu, Mark W Kroll, Michael Brave
INTRODUCTION: The TASER® conducted electrical weapon (CEW) is best known for delivering electrical pulses that can temporarily incapacitate subjects by overriding normal motor control. The alternative drive-stun mode is less understood and the goal of this paper is to analyze the distribution of currents in tissues when the CEW is operated in this mode. METHODS AND RESULTS: Finite element modeling (FEM) was used to approximate current density in tissues with boundary electrical sources placed 40 mm apart...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227390/bio-heat-transfer-model-of-electroconvulsive-therapy-effect-of-biological-properties-on-induced-temperature-variation
#18
Marilia M de Oliveira, Paul Wen, Tony Ahfock, Marilia M de Oliveira, Paul Wen, Tony Ahfock, Paul Wen, Marilia M de Oliveira, Tony Ahfock
A realistic human head model consisting of six tissue layers was modelled to investigate the behavior of temperature profile and magnitude when applying electroconvulsive therapy stimulation and different biological properties. The thermo-electrical model was constructed with the use of bio-heat transfer equation and Laplace equation. Three different electrode montages were analyzed as well as the influence of blood perfusion, metabolic heat and electric and thermal conductivity in the scalp. Also, the effect of including the fat layer was investigated...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226992/multi-layer-low-frequency-tissue-equivalent-phantoms-for-noninvasive-test-of-shallow-implants-and-evaluating-antenna-body-interaction
#19
Lawrence Fomundam, Jenshan Lin, Lawrence Fomundam, Jenshan Lin, Jenshan Lin, Lawrence Fomundam
In this work, a tissue equivalent compound phantom with dielectric properties equivalent to an average human body surface has been developed for a low frequency operating range of 30 MHz to 200 MHz. The compound phantom consists of skin, fat, and muscle layers respectively. The phantom is simple to fabricate with low cost components. A custom coaxial test fixture has been developed to characteristic phantom dielectric properties, which eliminates use of a specialized expensive dielectric measurement probe. The proposed composite phantom can be used as a noninvasive technique to evaluate shallow biomedical implants, antenna-body interaction, and specific absorption rate of tissue media...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226982/measurement-of-electrical-impedance-in-different-ex-vivo-tissues
#20
Davide Meroni, Dario Bovio, Pietro A Frisoli, Andrea Aliverti, Davide Meroni, Dario Bovio, Pietro A Frisoli, Andrea Aliverti, Dario Bovio, Andrea Aliverti, Davide Meroni, Pietro A Frisoli
Bioimpedance allows living tissues characterization and detection of pathological states. Although in previous years several methods have been proposed to assess bioimpedance, many instruments used in studies of living tissues characterization are commercial devices designed for the measurement of components or electronic circuits and therefore the measurement of biological tissues can be affected by electrical polarization. In order to test if electrical impedance spectroscopy may be helpful in providing further information about the structure and the properties of tissues, an impedance meter for living-tissues, able to avoid polarization, was developed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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