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Zekai Cui, Qiaolang Zeng, Yonglong Guo, Shiwei Liu, Jiansu Chen
Diabetic retinopathy (DR) is the most common chronic complication of diabetes. It can cause impaired vision and even blindness. However, the pathological mechanism of DR is still unknown. In the present study, we use bioinformatic analysis to reveal the pathological changes of early DR in a streptozotocin (STZ) induced diabetes rat model. The dataset GSE28831 was downloaded from the Gene Expression Omnibus (GEO) database. To clarify the pathological mechanism of early DR, genes which were up-regulated (UP group) or down-regulated (DOWN group) over time were identified...
2018: PeerJ
Virender Kumar, Vijay Kumar, Tek Chand Bhalla
The present work explores a rare cyanide dihydratase of Flavobacterium indicum MTCC 6936 for its potential of cyanide degradation. The enzyme is purified to 12 fold with a yield of 76%. SDS and native-PAGE analysis revealed that enzyme was monomer of 40 kDa size. The enzyme works well in mesophilic range at wide array of pH. The thermostability profile of cyanide dihydratase revealed that the enzyme is quite stable at 30 °C and 35 °C with half-life of 6 h 30 min and 5 h respectively. Km and Vmax for cyanide dihydratase of F...
May 15, 2018: International Journal of Biological Macromolecules
Sophia Magkouta, Apostolos Pappas, Ioannis S Pateras, Androniki Kollintza, Charalampos Moschos, Maria-Eleni Vazakidou, Vasiliki Karavana, Vassilis G Gorgoulis, Ioannis Kalomenidis
Malignant pleural mesothelioma is resistant to currently used treatment. Angiopoieitn-1 directly promotes mesothelioma cell growth in a Tie-2-dependent fashion. Angiopoietin/Tie-2 axis may thus be valid targets for therapeutic interventions against mesothelioma. We hypothesized that a soluble angiopoietin inhibitor (Murine Tek-deltaFc) would halt mesothelioma progression in vivo by enhancing mesothelioma cell proliferation and inhibiting tumor angiogenesis. Our hypothesis was challenged on two syngeneic mesothelioma in vivo models (AB1 cells-Balb/c mice and AE17 cells-C57BL/6 mice...
April 24, 2018: Oncotarget
Ming-Yue Sun, Miao Zhang, Shui-Ling Chen, Shu-Ping Zhang, Chun-Yu Guo, Jing-Shang Wang, Xin Liu, Yang Miao, Hui-Jun Yin
BACKGROUND/AIMS: Systemic iron homeostasis is strictly governed in mammals; however, disordered iron metabolism (such as excess iron burden) is recognized as a risk factor for various types of diseases including AS (Atherosclerosis). The hepcidin-ferroportin axis plays the key role in regulation of iron homeostasis and modulation of this signaling could be a potential therapeutic strategy in the treatment of these diseases. TMP (Tetramethylpyrazine) has been reported to have therapeutical effect on AS...
May 9, 2018: Cellular Physiology and Biochemistry
Zhongnan Wang, Qian Chai, Mingzhao Zhu
Cellular cross-talk mediated by lymphotoxin αβ-lymphotoxin β receptor (LTβR) signaling plays a critical role in lymph node (LN) development. Although the major role of LTβR signaling has long been considered to occur in mesenchymal lymphoid tissue organizer cells, a recent study using a VE-cadherincre Ltbrfl/fl mouse model suggested that endothelial LTβR signaling contributes to the formation of LNs. However, the detailed roles of LTβR in different endothelial cells (ECs) in LN development remain unknown...
May 14, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
Christy L Cummings, Gina M Geis, Henry A Feldman, Elisa R Berson, Jennifer C Kesselheim
OBJECTIVE: To develop and validate the Test of Ethics Knowledge in Neonatology (TEK-Neo) with good internal consistency reliability, item performance, and construct validity that reliably assesses interprofessional staff and trainee knowledge of neonatal ethics. STUDY DESIGN: We adapted a published test of ethics knowledge for use in neonatology. The novel instrument had 46 true/false questions distributed among 7 domains of neonatal ethics: ethical principles, professionalism, genetic testing, beginning of life/viability, end of life, informed permission/decision making, and research ethics...
May 10, 2018: Journal of Pediatrics
Madhulika Kushwaha, Virender Kumar, Rishi Mahajan, Tek Chand Bhalla, Subhankar Chatterjee, Yusuf Akhter
The present study provides molecular insights into the activity and mechanism of cyanide hydratase enzyme associated with degradation of cyanide compounds, using Serratia marcescens RL2b as a model organism. Resting cells harvested after 20 h achieved complete degradation of 12 mmol l- 1 cyanide in approximately 10 h. High-performance liquid chromatography analysis of reaction samples revealed formation of formamide as the only end product, which confirmed the presence of cyanide hydratase activity in S...
May 9, 2018: Archives of Microbiology
Nilüfer Acar-Tek, Duygu Agagüundüz, Büşra Ayhan
OBJECTIVE: This study was conducted to determine the effects of green coffee consumption on resting energy expenditures (REEs), blood pressure, and body temperature of individuals. METHOD: The study was conducted with 24 women. The REE values of the individuals were measured with the COSMED Fitmate PRO. After the first REE measurements, individuals were given 1 cup of green coffee that was prepared to contain 6 mg caffeine per kg of lean body mass. After coffee consumption, REE measurements were made at 30, 60, 120, and 180 minutes...
May 3, 2018: Journal of the American College of Nutrition
Tek Long Chan, Zuowei Xie
Conjugation between a 3-D icosahedral carborane and a fused 2-D π-ring system is ambiguous. To address this issue, we prepared several carborane-fused carbo- and heterocycles. Detailed studies on their molecular structures, NMR data, and NICS (nucleus-independent chemical shift) and ISE (isomerization stabilization energy) values as well as molecular orbital analyses clearly suggest the presence of (1) considerable aromatic character in the exo five-membered ring of carborane-fused carbo- and heterocycles and (2) considerable conjugation between a 3-D carborane and a fused 2-D π-ring system...
February 28, 2018: Chemical Science
Kyu-Tek Park, Yang-Seop Bae
The genus Anarsia Zeller (Lepidoptera, Gelechiidae) in Laos is reviewed, with 11 species including one new species: Anarsia laosana sp. nov. Additionally another 10 species of the genus, namely, Anarsia choana Park, A. decora Li Zheng, A. isogona Meyrick, A. kepensis Park, A. ovula Park and Ponomarenko, A. paraisogona Park and Ponomarenko, A. patulella (Walker), A. porthmisa Park, A. phortica Meyrick, and A. tricornis Meyrick, are reported for the first time from Laos. Photos of all recorded species are shown, and genitalia for the new species and two poorly known species, A...
March 21, 2018: Zootaxa
L E Fodor, A Gézsi, Z Gál, A Nagy, A Kiss, A Bikov, C Szalai
The Tie2 receptor is an important player in angiogenesis. The Tie2 mRNA and protein are abundantly expressed in the lungs and the associated pathway also has an important role in the development and function of the eye. Tie2 is encoded by the TEK gene in humans. Recently, variations in the TEK gene have been found associated with asthma. The objective of the present study was to investigate whether variations in the TEK gene influenced the susceptibility to pediatric asthma and/or associated phenotypes like GINA status, viral- or exercise-induced asthma, allergic asthma, indoor, outdoor, inhalative allergies, IgE and eosonophil levels, allergic rhinitis and allergic conjunctivitis...
April 18, 2018: International Journal of Immunogenetics
Hayden Tronnolone, Alexander Tam, Zoltán Szenczi, J E F Green, Sanjeeva Balasuriya, Ee Lin Tek, Jennifer M Gardner, Joanna F Sundstrom, Vladimir Jiranek, Stephen G Oliver, Benjamin J Binder
The emergence of diffusion-limited growth (DLG) within a microbial colony on a solid substrate is studied using a combination of mathematical modelling and experiments. Using an agent-based model of the interaction between microbial cells and a diffusing nutrient, it is shown that growth directed towards a nutrient source may be used as an indicator that DLG is influencing the colony morphology. A continuous reaction-diffusion model for microbial growth is employed to identify the parameter regime in which DLG is expected to arise...
April 16, 2018: Scientific Reports
Waqar Al-Kubaisy, Suzanna Daud, Mustafa Waseem Al-Kubaisi, Omar Waseem Al-Kubaisi, Nik Nairan Abdullah
INTRODUCTION: Hepatitis C virus (HCV) infection is a serious health problem. It is a major contributor to end-stage liver disease. Worldwide, 1-8% of all pregnant women were infected. Women with viral hepatitis may be at an increased risk of pregnancy complications. There are several obstetrics intervention act as risk factors which are specific to women pertaining the HCV infection; anti-D immunoglobulin (Ig) therapy may be one of them. Our objectives were to estimate the prevalence of HCV antibodies (anti-HCV), RNA, and genotype distribution among women with anti-D Ig therapy...
April 15, 2018: Journal of Maternal-fetal & Neonatal Medicine
Deborah H L Ng, Kalisvar Marimuthu, Jia Jun Lee, Wei Xin Khong, Oon Tek Ng, Wei Zhang, Bee Fong Poh, Pooja Rao, Maya Devi Rajinder Raj, Brenda Ang, Partha Pratim De
Background: In May 2015, we noticed an increase in carbapenem-resistant Acinetobacter baumannii (CRAB) infections in the Medical Intensive Care Unit (MICU). To investigate this, we studied the extent of environmental contamination and subsequent onward clonal transmission of CRAB. Methods: We conducted a one-day point prevalence screening (PPS) of the patients and environment in the MICU. We screened patients using endotracheal tube aspirates and swabs from nares, axillae, groin, rectum, wounds, and exit sites of drains...
2018: Antimicrobial Resistance and Infection Control
Feng Guo, Chenchen Si, Mingjuan Zhou, Jingwen Wang, Dan Zhang, Peter C K Leung, Bufang Xu, Aijun Zhang
STUDY QUESTION: Is recurrent implantation failure (RIF) associated with decreased expression of platelet and endothelial cell adhesion molecule 1 (PECAM1) and transforming growth factor β1 (TGF-β1) in the endometrium during the implantation window? SUMMARY ANSWER: The present study demonstrates that the expression of PECAM1 and TGF-β1 is significantly decreased in the mid-secretory endometrium in women with RIF, which may account for embryo implantation failure...
March 30, 2018: Human Reproduction
Michael H Otim, Wee Tek Tay, Thomas K Walsh, Dalton Kanyesigye, Stella Adumo, Joseph Abongosi, Stephen Ochen, Julius Sserumaga, Simon Alibu, Grace Abalo, Godfrey Asea, Ambrose Agona
The fall armyworm (FAW) Spodoptera frugiperda (J. E. Smith) is a species native to the Americas. This polyphagous lepidopteran pest was first reported in Nigeria and the Democratic Republic of São Tomé and Principe in 2016, but its presence in eastern Africa has not been confirmed via molecular characterisation. In this study, FAW specimens from western and central Uganda were identified based on the partial mtDNA COI gene sequences, with mtDNA COI haplotypes matching those identified in Nigeria and São Tomé...
2018: PloS One
Craig J Anderson, John G Oakeshott, Wee Tek Tay, Karl H J Gordon, Andreas Zwick, Tom K Walsh
Within the mega-pest lineage of heliothine moths are a number of polyphagous, highly mobile species for which the exchange of adaptive traits through hybridization would affect their properties as pests. The recent invasion of South America by one of the most significant agricultural pests, Helicoverpa armigera , raises concerns for the formation of novel combinations of adaptive genes following hybridization with the closely related Helicoverpa zea To investigate the propensity for hybridization within the genus Helicoverpa , we carried out whole-genome resequencing of samples from six species, focusing in particular upon H...
April 2, 2018: Proceedings of the National Academy of Sciences of the United States of America
Frederick N Dong, Amir Amiri-Yekta, Guillaume Martinez, Antoine Saut, Julie Tek, Laurence Stouvenel, Patrick Lorès, Thomas Karaouzène, Nicolas Thierry-Mieg, Véronique Satre, Sophie Brouillet, Abbas Daneshipour, Seyedeh Hanieh Hosseini, Mélanie Bonhivers, Hamid Gourabi, Emmanuel Dulioust, Christophe Arnoult, Aminata Touré, Pierre F Ray, Haiqing Zhao, Charles Coutton
The multiple morphological abnormalities of the flagella (MMAF) phenotype is among the most severe forms of sperm defects responsible for male infertility. The phenotype is characterized by the presence in the ejaculate of immotile spermatozoa with severe flagellar abnormalities including flagella being short, coiled, absent, and of irregular caliber. Recent studies have demonstrated that MMAF is genetically heterogeneous, and genes thus far associated with MMAF account for only one-third of cases. Here we report the identification of homozygous truncating mutations (one stop-gain and one splicing variant) in CFAP69 of two unrelated individuals by whole-exome sequencing of a cohort of 78 infertile men with MMAF...
March 28, 2018: American Journal of Human Genetics
Malin Inghammar, Laurence Borand, Sophie Goyet, Blandine Rammaert, Vantha Te, Patrich Lorn Try, Bertrand Guillard, Philippe Buchy, Sirenda Vong, Eap Tek Chheng, Philippe Cavailler, Charles Mayaud, Arnaud Tarantola
Background: In Western settings, community-acquired pneumonia (CAP) due to Gram-negative bacilli (GNB) is relatively rare. Previous studies from Asia, however, indicate a higher prevalence of GNB in CAP, but data, particularly from Southeast Asia, are limited. Methods: This is a prospective observational study of 1451 patients ≥15 y of age with CAP from two hospitals in Cambodia between 2007 and 2010. The proportion of GNB was estimated. Risk factors and clinical characteristics of CAP due to GNB were assessed using logistic regression models...
March 22, 2018: Transactions of the Royal Society of Tropical Medicine and Hygiene
Hessa S Alsaif, Arif O Khan, Nisha Patel, Hisham Alkuraya, Mais Hashem, Firdous Abdulwahab, Niema Ibrahim, Mohammed A Aldahmesh, Fowzan S Alkuraya
Primary congenital glaucoma is a trabecular meshwork dysgenesis with resultant increased intraocular pressure and ocular damage. CYP1B1 mutations remain the most common identifiable genetic cause. However, important questions about the penetrance of CYP1B1-related congenital glaucoma remain unanswered. Furthermore, mutations in other genes have been described although their exact contribution and potential genetic interaction, if any, with CYP1B1 mutations are not fully explored. In this study, we employed modern genomic approaches to re-examine CYP1B1-related congenital glaucoma...
March 19, 2018: Human Genetics
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