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https://www.readbyqxmd.com/read/27911920/sirna-targeting-mtor-effectively-prevents-the-proliferation-and-migration-of-human-lens-epithelial-cells
#1
Chunmei Zhang, Jingjing Liu, Na Jin, Guiming Zhang, Yahui Xi, Hongling Liu
Posterior capsule opacification (PCO) is the most common complication that causes visual decrease after extracapsular cataract surgery. The primary cause of PCO formation is the proliferation of the residual lens epithelial cells (LECs). The mammalian target of rapamycin (mTOR) plays an important role in the growth and migration of LECs. In the current study, we used small interfering RNA (siRNA) to specifically attenuate mTOR in human lens epithelial B3 cells (HLE B3). We aimed to examine the effect of mTOR-siRNA on the proliferation, migration and epithelial-to-mesenchymal transition (EMT) of HLE B3 cells and explore the underlying mechanisms...
2016: PloS One
https://www.readbyqxmd.com/read/27910705/left-right-differences-in-ovarian-volume-and-antral-follicle-count-in-1423-women-of-reproductive-age
#2
Anne-Sofie Korsholm, Helene Westring Hvidman, Janne Gasseholm Bentzen, Anders Nyboe Andersen, Kathrine Birch Petersen
The aim of this cross-sectional study was to investigate side differences in antral follicle count (AFC) and ovarian volume in left versus right ovaries in relation to chronological and "biological" age, the latter estimated by anti-Müllerian hormone (AMH) levels. The cohort comprised 1423 women: 1014 fertile and 409 infertile. All were examined by transvaginal sonography and serum AMH. Overall the right ovary contained 8.1% more antral follicles (p = 0.002) and had 10.7% larger volume compared with the left (p < 0...
December 2, 2016: Gynecological Endocrinology
https://www.readbyqxmd.com/read/27908212/are-crh-ngf-as-psychoneuroimmune-regulators-in-women-with-polycystic-ovary-syndrome
#3
F Z Zangeneh, M M Naghizadeh, M Bagheri, M Jafarabadi
PURPOSE: Polycystic ovary syndrome (PCOS) affects quality of life and can worsen anxiety and depression either due to the features of PCOS or due to the diagnosis of a chronic disease. Corticotrophin-releasing hormone (CRH) and nerves growth factor (NGF) are the modulator for the actions of the sympathetic nervous and immune systems. METHODS: In total, 171 women divided into two groups: study and control groups. Serum CRH, NGF, and interleukins: IL-1α. IL-1β, 17A, and TNFα were determined by ELISA Kits in both groups...
December 2, 2016: Gynecological Endocrinology
https://www.readbyqxmd.com/read/27902723/should-all-women-with-polycystic-ovary-syndrome-be-screened-for-metabolic-parameters-a-hospital-based-observational-study
#4
Hui Li, Lin Li, Jian Gu, Yu Li, Xiaoli Chen, Dongzi Yang
This hospital-based observational study aims to estimate differences in metabolic abnormalities between different polycystic ovary syndrome (PCOS) phenotypes and their distribution characteristics. The prevalence of metabolic abnormalities among different PCOS phenotypes, including diabetes mellitus (DM), metabolic syndrome (MS), pre-diabetes mellitus (pre-DM), insulin resistance (IR) and dyslipidemia were compared. A total of 2436 women who were ≥18 years old and who were hospitalized in Sun Yat-Sen University affiliated hospital from 1998 to 2015 in GuangZhou, China, were included in this study...
2016: PloS One
https://www.readbyqxmd.com/read/27898867/angus-calves-born-and-raised-at-high-altitude-adapt-to-hypobaric-hypoxia-by-increasing-alveolar-ventilation-rate-but-not-hematocrit
#5
A K Gulick, F B Garry, T N Holt, K Retallick-Trennepohl, R M Enns, M G Thomas, J M Neary
The objective of this study was to evaluate the effect of altitude on arterial blood-gases and hematocrit in Angus-based calves. It was hypothesized that alveolar ventilation rate, as indicated by arterial pCO, would increase with altitude but hematocrit would not. Five Angus-based herds ( = 30 to 80 per cohort) located at 105 m, 1,470 m, 2,010 m, 2,170 m, and 2,730 m above sea level were enrolled in this prospective cohort study. A portable analyzer measured blood-gas tensions in coccygeal arterial blood. Calves at 1,470 m, 2,170 m, and 2,730 m were sampled twice, at approximately 4 mo and 7 mo of age...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27897089/anti-aging-effect-of-metformin-on-brain-in-naturally-aged-and-accelerated-senescence-model-of-rat
#6
Geetika Garg, Sandeep Singh, Abhishek Kumar Singh, Syed Ibrahim Rizvi
Metformin, a biguanide, is a widely used anti-diabetic drug which inhibits gluconeogenesis and is used to treat hyperglycemia in type 2 diabetes. Through activation of AMPK pathway, metformin also mimics caloric restriction health benefits. Aging causes substantial molecular to morphological changes in brain, the brain cells being more susceptible towards oxidative stress mediated damages due to the presence of high lipid content and higher oxygen consumption. Wistar rats (naturally aged and D Galactose induced rat model) were supplemented with metformin (300 mg/kg b...
November 29, 2016: Rejuvenation Research
https://www.readbyqxmd.com/read/27872711/ozone-therapy-could-attenuate-tubulointerstitial-injury-in-adenine-induced-ckd-rats-by-mediating-nrf2-and-nf-%C3%AE%C2%BAb
#7
Gang Yu, Xiuheng Liu, Zhiyuan Chen, Hui Chen, Lei Wang, Zhishun Wang, Tao Qiu, Xiaodong Weng
OBJECTIVES: This study aims to determine the effects of ozone therapy on restoring impaired Nrf2 activation to ameliorate chronic tubulointerstitial injury in rats with adenine-induced CKD. MATERIALS AND METHODS: Sprague-Dawley rats were fed with 0.75% adenine-containing diet to induce CKD and chronic tubulointerstitial injury. Ozone therapy was administered by rectal insufflation. After 4 weeks, serum and kidney samples were collected and analyzed. Renal function and systemic electrolyte level were detected...
October 2016: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/27852101/human-chorionic-gonadotrophin-priming-for-fertility-treatment-with-in-vitro-maturation
#8
REVIEW
Jane Reavey, Katy Vincent, Timothy Child, Ingrid E Granne
BACKGROUND: In vitro maturation (IVM) is a fertility treatment that involves the transvaginal retrieval of immature oocytes, and their subsequent maturation and fertilisation. Although the live birth rate is lower than conventional in vitro fertilisation (IVF) with ovarian stimulation, it is a useful treatment, as it avoids the risk of ovarian hyperstimulation syndrome (OHSS). Women with polycystic ovaries (PCO) or polycystic ovarian syndrome (PCOS) are at an increased risk of OHSS. Thus, IVM may be a more useful treatment in this patient group...
November 16, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27843291/a-new-endocapsular-open-ring-for-prevention-of-anterior-and-posterior-capsule-opacification
#9
Ioannis G Pallikaris, Nela R Stojanovic, Harilaos S Ginis
PURPOSE: The aim of this study is to demonstrate the functionality of a new design of a thick endocapsular open ring for prevention of anterior capsule opacification (ACO) and posterior capsule opacification (PCO). SETTING: The Institute of Vision and Optics, University of Crete and University Hospital of Heraklion, Crete, Greece. DESIGN: Prospective, interventional pilot study. METHODS: Fifteen patients (17 eyes) underwent cataract surgery with phacoemulsification...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27832099/microplasma-induced-cell-morphological-changes-and-apoptosis-of-ex-vivo-cultured-human-anterior-lens-epithelial-cells-relevance-to-capsular-opacification
#10
Nina Recek, Sofija Andjelić, Nataša Hojnik, Gregor Filipič, Saša Lazović, Alenka Vesel, Gregor Primc, Miran Mozetič, Marko Hawlina, Goran Petrovski, Uroš Cvelbar
Inducing selective or targeted cell apoptosis without affecting large number of neighbouring cells remains a challenge. A plausible method for treatment of posterior capsular opacification (PCO) due to remaining lens epithelial cells (LECs) by reactive chemistry induced by localized single electrode microplasma discharge at top of a needle-like glass electrode with spot size ~3 μm is hereby presented. The focused and highly-localized atmospheric pressure microplasma jet with electrode discharge could induce a dose-dependent apoptosis in selected and targeted individual LECs, which could be confirmed by real-time monitoring of the morphological and structural changes at cellular level...
2016: PloS One
https://www.readbyqxmd.com/read/27825290/antioxidant-and-anti-inflammatory-effects-of-nasturtium-officinale-involved-in-attenuation-of-gentamicin-induced-nephrotoxicity
#11
Somayeh Shahani, Farzaneh Behzadfar, Danial Jahani, Maryam Ghasemi, Fatemeh Shaki
BACKGROUND AND PURPOSE: Gentamicin (GM) is used against bacterial infections. The aim of our investigation was to evaluate the role of inflammation and also oxidative damage in nephrotoxic potential of GM and protective effects of Nasturtium officinale (watercress) against GM-induced nephrotoxicity in Wistar rats. MATERIAL AND METHOD: The animals were divided into eight groups: control, solvent, GM (80 mg/kg IP), GM with three doses (50,100, 200 mg/kg/day) of hydroalcoholic extract of watercress and one group only received high dose of extract and a group which received gentamicin plus vitamin E for 10 consecutive days...
November 8, 2016: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/27816305/the-contributions-of-fasting-and-postprandial-blood-glucose-increments-to-oxidative-stress-and-inflammation-in-dyslipidemic-type-2-diabetic-patients-with-stable-ischemic-heart-disease
#12
Boris Djindjic, Tomislav Kostic, Zoran Radovanovic, Natasa Djindjic, Marko Lazovic, Misko Zivic, Zoran Perisic, Nebojsa Krstic
BACKGROUND/OBJECTIVES: Contributions of fasting and postprandial blood glucose increments on level of inflammation and oxidative stress biomarkers in patients with stable ischemic heart disease (IHD) and diabetes mellitus type 2 (T2DM) was evaluated. METHODOLOGY: Ninety T2DM patients (60 with IHD and 30 without IHD) treated with metformin and/or sulphonylurea were enrolled in cross-sectional nested case-control clinical study. The areas under the six-point daily glucose curve above the fasting glucose concentrations (AUCpp) and over 5...
October 31, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27803713/plasma-markers-of-oxidative-stress-in-patients-with-gestational-diabetes-mellitus-in-the-second-and-third-trimester
#13
Hongwei Li, Qian Yin, Ning Li, Zhenbo Ouyang, Mei Zhong
Objective. To determine plasma markers of oxidative stress during the second and third trimester of pregnancy in patients with gestational diabetes mellitus (GDM). Study Design. We conducted a prospective nested case-control study involving 400 pregnant women, 22 of whom developed GDM. As control group, 30 normal pregnant women were chosen randomly. Plasma samples were analyzed for 8-iso-prostaglandin F2α (8-iso-PGF2α), advanced oxidative protein products (AOPPs), protein carbonyl (PCO), glutathione peroxidase-3 (GPX-3), and paraoxonase-1 (PON1) at 16-20 weeks, 24-28 weeks, and 32-36 weeks of gestation...
2016: Obstetrics and Gynecology International
https://www.readbyqxmd.com/read/27787561/%C3%AE-catenin-cbp-dependent-signaling-regulates-tgf-%C3%AE-induced-epithelial-to-mesenchymal-transition-of-lens-epithelial-cells
#14
Aftab Taiyab, Anna Korol, Paula A Deschamps, Judith A West-Mays
Purpose: Transforming growth factor-β-induced epithelial-mesenchymal transition (EMT) is one of the main causes of posterior capsular opacification (PCO) or secondary cataract; however, the signaling events involved in TGF-β-induced PCO have not been fully characterized. Here, we focus on examining the role of β-catenin/cyclic AMP response element-binding protein (CREB)-binding protein (CBP) and β-catenin/T-cell factor (TCF)-dependent signaling in regulating cytoskeletal dynamics during TGF-β-induced EMT in lens epithelial explants...
October 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27746231/tracking-recurrence-of-correlation-structure-in-neuronal-recordings
#15
Samuel A Neymotin, Zoe N Talbot, Jeeyune Q Jung, André A Fenton, William W Lytton
BACKGROUND: Correlated neuronal activity in the brain is hypothesized to contribute to information representation, and is important for gauging brain dynamics in health and disease. Due to high dimensional neural datasets, it is difficult to study temporal variations in correlation structure. NEW METHOD: We developed a multiscale method, Population Coordination (PCo), to assess neural population structure in multiunit single neuron ensemble and multi-site local field potential (LFP) recordings...
October 13, 2016: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/27712997/revisiting-secondary-capsulotomy-for-posterior-capsule-management-in-pediatric-cataract-surgery
#16
Zachary P Elkin, W Jordan Piluek, Douglas R Fredrick
PURPOSE: To evaluate the development and treatment of visual axis opacification following pediatric cataract extraction with intraocular lens placement (IOL) without primary posterior capsulotomy and anterior vitrectomy (PPC+AV). METHODS: The medical records of children who underwent cataract extraction and IOL at an academic medical center were reviewed retrospectively for development of posterior capsular opacification (PCO) to identify risk factors for development of treatment-requiring posterior capsular opacification...
October 3, 2016: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/27708269/tuning-the-catalytic-co-hydrogenation-to-straight-and-long-chain-aldehydes-alcohols-and-olefins-paraffins
#17
Yizhi Xiang, Norbert Kruse
The catalytic CO hydrogenation is one of the most versatile large-scale chemical syntheses leading to variable chemical feedstock. While traditionally mainly methanol and long-chain hydrocarbons are produced by CO hydrogenation, here we show that the same reaction can be tuned to produce long-chain n-aldehydes, 1-alcohols and olefins, as well as n-paraffins over potassium-promoted CoMn catalysts. The sum selectivity of aldehydes and alcohols is usually >50 wt% whereof up to ∼97% can be n-aldehydes. While the product slate contains ∼60% n-aldehydes at /pCO=0...
October 6, 2016: Nature Communications
https://www.readbyqxmd.com/read/27695523/swift-thermal-reaction-norm-evolution-in-a-key-marine-phytoplankton-species
#18
Luisa Listmann, Maxime LeRoch, Lothar Schlüter, Mridul K Thomas, Thorsten B H Reusch
Temperature has a profound effect on the species composition and physiology of marine phytoplankton, a polyphyletic group of microbes responsible for half of global primary production. Here, we ask whether and how thermal reaction norms in a key calcifying species, the coccolithophore Emiliania huxleyi, change as a result of 2.5 years of experimental evolution to a temperature ≈2°C below its upper thermal limit. Replicate experimental populations derived from a single genotype isolated from Norwegian coastal waters were grown at two temperatures for 2...
October 2016: Evolutionary Applications
https://www.readbyqxmd.com/read/27695520/loss-of-genetic-diversity-as-a-consequence-of-selection-in-response-to-high-pco2
#19
Melanie M Lloyd, April D Makukhov, Melissa H Pespeni
Standing genetic variation may allow for rapid evolutionary response to the geologically unprecedented changes in global conditions. However, there is little known about the consequences of such rapid evolutionary change. Here, we measure genetic responses to experimental low and high pCO 2 levels in purple sea urchin larvae, Strongylocentrotus purpuratus. We found greater loss of nucleotide diversity in high pCO 2 levels (18.61%; 900 μatm) compared to low pCO 2 levels (10.12%; 400 μatm). In the wild, this loss could limit the evolutionary capacity of future generations...
October 2016: Evolutionary Applications
https://www.readbyqxmd.com/read/27695519/selection-on-oxidative-phosphorylation-and-ribosomal-structure-as-a-multigenerational-response-to-ocean-acidification-in-the-common-copepod-pseudocalanus-acuspes
#20
Pierre De Wit, Sam Dupont, Peter Thor
Ocean acidification is expected to have dramatic impacts on oceanic ecosystems, yet surprisingly few studies currently examine long-term adaptive and plastic responses of marine invertebrates to pCO 2 stress. Here, we exposed populations of the common copepod Pseudocalanus acuspes to three pCO 2 regimes (400, 900, and 1550 μatm) for two generations, after which we conducted a reciprocal transplant experiment. A de novo transcriptome was assembled, annotated, and gene expression data revealed that genes involved in RNA transcription were strongly down-regulated in populations with long-term exposure to a high pCO 2 environment, even after transplantation back to control levels...
October 2016: Evolutionary Applications
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