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https://www.readbyqxmd.com/read/28445828/targeting-the-aryl-hydrocarbon-receptor-nuclear-translocator-complex-with-dmog-and-stemregenin-1-improves-primitive-hematopoietic-stem-cell-expansion
#1
Carlo Stephan Jackson, Chrisna Durandt, Ilse Janse van Rensburg, Vincent Praloran, Philippe Brunet de la Grange, Michael Sean Pepper
Culture conditions used for the expansion of hematopoietic stem and progenitor cells (HSCs and HPCs, collectively HSPCs) should ideally favor the self renewal of long-term HSCs. At 20% O2, the synthesis of HIF-1α is balanced by its hydroxylation and proteasomal degradation. This favors HSPC differentiation, but can be prevented by culturing CD34+ cord blood cells in the presence of dimethyloxaloylglycine (DMOG). This differentiation may also be reduced by culturing the cells in the presence of Stemregenin 1, an antagonist of the aryl hydrocarbon receptor (AhR)...
April 20, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28445516/transplantation-of-induced-mesenchymal-stem-cells-for-treating-chronic-renal-insufficiency
#2
Xing-Hua Pan, Jing Zhou, Xiang Yao, Jun Shu, Ju-Fen Liu, Jian-Yong Yang, Rong-Qing Pang, Guang-Ping Ruan
Discovering a new cell transplantation approach for treating chronic renal insufficiency is a goal of many nephrologists. In vitro-cultured peripheral blood mononuclear cells (PBMCs) were reprogrammed into induced mesenchymal stem cells (iMSCs) by using natural inducing agents made in our laboratory. The stem cell phenotype of the iMSCs was then identified. Unilateral ureteral obstruction (UUO) was used to create an animal model of chronic renal insufficiency characterized by renal interstitial fibrosis. The induced and non-induced PBMCs were transplanted, and the efficacy of iMSCs in treating chronic renal insufficiency was evaluated using a variety of methods...
2017: PloS One
https://www.readbyqxmd.com/read/28445250/enteric-fever-in-children-in-western-sydney-australia-2003-2015
#3
Ameneh Khatami, Fouzia Khan, Kristine K Macartney
BACKGROUND: Enteric fever is a vaccine-preventable disease with cases in Australia predominantly acquired overseas. The aim of this study was to define the burden of enteric fever in children presenting to a pediatric hospital in Western Sydney between 2003 and 2015. METHODS: Cases between January 2003 and December 2013 were ascertained through medical records using ICD-coded discharge diagnoses, cross-referenced with microbiology laboratory data for all isolates of Salmonella enterica serovar Typhi (S...
April 25, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28444175/predictive-value-of-telomere-length-on-outcome-following-acute-myocardial-infarction-evidence-for-contrasting-effects-of-vascular-vs-blood-oxidative-stress
#4
Marios Margaritis, Fabio Sanna, George Lazaros, Ioannis Akoumianakis, Sheena Patel, Alexios S Antonopoulos, Chloe Duke, Laura Herdman, Costas Psarros, Evangelos K Oikonomou, Cheerag Shirodaria, Mario Petrou, Rana Sayeed, George Krasopoulos, Regent Lee, Dimitris Tousoulis, Keith M Channon, Charalambos Antoniades
Aims: Experimental evidence suggests that telomere length (TL) is shortened by oxidative DNA damage, reflecting biological aging. We explore the value of blood (BTL) and vascular TL (VTL) as biomarkers of systemic/vascular oxidative stress in humans and test the clinical predictive value of BTL in acute myocardial infarction (AMI). Methods and results: In a prospective cohort of 290 patients surviving recent AMI, BTL measured on admission was a strong predictor of all-cause [hazard ratio (HR) [95% confidence interval (CI)]: 3...
April 24, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28443989/diagnostic-and-prognostic-value-of-procalcitonin-for-early-intracranial-infection-after-craniotomy
#5
Y Yu, H J Li
Intracranial infection is a common clinical complication after craniotomy. We aimed to explore the diagnostic and prognostic value of dynamic changing procalcitonin (PCT) in early intracranial infection after craniotomy. A prospective study was performed on 93 patients suspected of intracranial infection after craniotomy. Routine peripheral venous blood was collected on the day of admission, and C reactive protein (CRP) and PCT levels were measured. Cerebrospinal fluid (CSF) was collected for routine biochemical, PCT and culture assessment...
April 20, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28443688/use-of-c-banding-for-identifying-radiation-induced-micronuclei
#6
S C de Lima, A Amaral, T de Salazar E Fernandes
Differentiation of micronuclei (MN) caused by ionizing radiation from those caused by chemicals is a crucial step for managing treatment of individuals exposed to radiation. MN in binucleated lymphocytes in peripheral blood are widely used as biomarkers for estimating dose of radiation, but they are not specific for ionizing radiation. MN induced by ionizing radiation originate predominantly as a result of chromosome breaks (clastogenic action), whereas MN caused by chemical agents are derived from the loss of entire chromosomes (aneugenic action)...
April 26, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28443247/evaluation-of-a-new-ifn-%C3%AE-release-assay-for-rapid-diagnosis-of-active-tuberculosis-in-a-high-incidence-setting
#7
Gen Li, Feng Li, Hui-Min Zhao, Han-Li Wen, Hai-Cong Li, Chun-Ling Li, Ping Ji, Peng Xu, Kang Wu, Zhi-Dong Hu, Shui-Hua Lu, Douglas B Lowrie, Jian-Xin Lv, Xiao-Yong Fan
Blood-based interferon-gamma (IFN-γ) release assays (IGRAs) have been proven to be useful in the diagnosis of Mycobacterium tuberculosis (Mtb) infection. However, IGRAs have not been recommended for clinical practice in most low-income settings due to cost-intensive limitations and shortage of clinical data available. The established T-SPOT. TB assay containing Mtb-specific antigens ESAT-6 and CFP10 are widely used for immunodiagonsis of Mtb infection, but the high cost is one of the restricting factors against its clinical application in the developing countries...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28443078/phytochemical-characterization-of-terminalia-catappa-linn-extracts-and-their-antifungal-activities-against-candida-spp
#8
Analucia G Terças, Andrea de Souza Monteiro, Eduardo B Moffa, Julliana R A Dos Santos, Eduardo M de Sousa, Anna R B Pinto, Paola C da Silva Costa, Antonio C R Borges, Luce M B Torres, Allan K D Barros Filho, Elizabeth S Fernandes, Cristina de Andrade Monteiro
Terminalia catappa Linn bark is used to treat dysentery by various populations in Southeast Asian countries, and its leaves have also been used in traditional medicine to treat hepatitis in India and the Philippines. Here, the antifungal actions of crude hydro-alcoholic extract (TcHE) and fractions from T. catappa leaves were assessed via the agar diffusion and microdilution tests on Candida reference strains and clinical isolates from patients with acquired immunodeficiency syndrome (AIDS). Additionally, the potential cytotoxic effects of TcHE were assessed on cultured human peripheral blood mononuclear cells (PBMC)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28442771/double-stranded-dna-induces-a-prothrombotic-phenotype-in-the-vascular-endothelium
#9
Erik Gaitzsch, Thomas Czermak, Andrea Ribeiro, Yvonn Heun, Monica Bohmer, Monika Merkle, Hanna Mannell, Christian Schulz, Markus Wörnle, Joachim Pircher
Double-stranded DNA (dsDNA) constitutes a potent activator of innate immunity, given its ability to bind intracellular pattern recognition receptors during viral infections or sterile tissue damage. While effects of dsDNA in immune cells have been extensively studied, dsDNA signalling and its pathophysiological implications in non-immune cells, such as the vascular endothelium, remain poorly understood. The aim of this study was to characterize prothrombotic effects of dsDNA in vascular endothelial cells. Transfection of cultured human endothelial cells with the synthetic dsDNA poly(dA:dT) induced upregulation of the prothrombotic molecules tissue factor and PAI-1, resulting in accelerated blood clotting in vitro, which was partly dependent on RIG-I signalling...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28442767/direct-rapid-antimicrobial-susceptibility-test-from-positive-blood-cultures-based-on-microscopic-imaging-analysis
#10
Jungil Choi, Hyun Yong Jeong, Gi Yoon Lee, Sangkwon Han, Shinhun Han, Bonghwan Jin, Taegeun Lim, Shin Kim, Dong Young Kim, Hee Chan Kim, Eui-Chong Kim, Sang Hoon Song, Taek Soo Kim, Sunghoon Kwon
For the timely treatment of patients with infections in bloodstream and cerebrospinal fluid, a rapid antimicrobial susceptibility test (AST) is urgently needed. Here, we describe a direct and rapid antimicrobial susceptibility testing (dRAST) system, which can determine the antimicrobial susceptibility of bacteria from a positive blood culture bottle (PBCB) in six hours. The positive blood culture sample is directly mixed with agarose and inoculated into a micropatterned plastic microchip with lyophilized antibiotic agents...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28442639/astaxanthin-increases-progesterone-production-in-cultured-bovine-luteal-cells
#11
Hachiro Kamada, Satoshi Akagi, Shinya Watanabe
Although astaxanthin (AST) is known to be a strong antioxidant, its effects on reproductive function in domestic animals have not yet been elucidated in detail. Therefore, we investigated the effects of AST on luteal cells, which produce progesterone (P4), an important hormone for maintaining pregnancy. Luteal cells were prepared by collagenase dispersion of the corpus luteum (CL). The addition of racemic AST at a low concentration (<10 nM) to cultured bovine luteal cells increased P4 in the culture medium (P<0...
April 23, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28442634/pharmacologic-targeting-erk1-2-attenuates-the-development-and-progression-of-hyperuricemic-nephropathy-in-rats
#12
Na Liu, Liuqing Xu, Yingfeng Shi, Lu Fang, Hongwei Gu, Hongrui Wang, Xiaoqiang Ding, Shougang Zhuang
The pathogenesis of hyperuricemia-induced chronic kidney disease is largely unknown. In this study, we investigated whether extracellular signal-regulated kinases1/2 (ERK1/2) would contribute to the development of hyperuricemic nephropathy (HN). In a rat model of HN induced by feeding mixture of adenine and potassium oxonate, increased ERK1/2 phosphorylation and severe glomerular sclerosis and renal interstitial fibrosis were evident, in parallel with diminished levels of renal function and increased urine microalbumin excretion...
April 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28442420/eggerthella-lenta-bacteremia-in-solid-tumor-cancer-patients-pathogen-or-witness-of-frailty
#13
Paul-Louis Woerther, Sami Antoun, Elisabeth Chachaty, Mansouria Merad
Eggerthella lenta is increasingly found in patients with severe comorbidities. Because oncologic patients are exposed to emerging pathogens, we aimed to describe the factors associated with E. lenta bacteremia in this immunosuppressed population. Oncology patients with blood cultures positive for E. lenta were retrospectively recorded from 2009 to 2015. Socio-demographic and medical/biological data as well as potential risk factors and mortality were recorded and analyzed. Twenty-three patients were included...
April 22, 2017: Anaerobe
https://www.readbyqxmd.com/read/28442293/effect-of-appropriate-combination-therapy-on-mortality-of-patients-with-bloodstream-infections-due-to-carbapenemase-producing-enterobacteriaceae-increment-a-retrospective-cohort-study
#14
Belén Gutiérrez-Gutiérrez, Elena Salamanca, Marina de Cueto, Po-Ren Hsueh, Pierluigi Viale, José Ramón Paño-Pardo, Mario Venditti, Mario Tumbarello, George Daikos, Rafael Cantón, Yohei Doi, Felipe Francisco Tuon, Ilias Karaiskos, Elena Pérez-Nadales, Mitchell J Schwaber, Özlem Kurt Azap, Maria Souli, Emmanuel Roilides, Spyros Pournaras, Murat Akova, Federico Pérez, Joaquín Bermejo, Antonio Oliver, Manel Almela, Warren Lowman, Benito Almirante, Robert A Bonomo, Yehuda Carmeli, David L Paterson, Alvaro Pascual, Jesús Rodríguez-Baño
BACKGROUND: The best available treatment against carbapenemase-producing Enterobacteriaceae (CPE) is unknown. The objective of this study was to investigate the effect of appropriate therapy and of appropriate combination therapy on mortality of patients with bloodstream infections (BSIs) due to CPE. METHODS: In this retrospective cohort study, we included patients with clinically significant monomicrobial BSIs due to CPE from the INCREMENT cohort, recruited from 26 tertiary hospitals in ten countries...
April 21, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28441069/low-doses-of-igg-from-atopic-individuals-can-modulate-in-vitro-ifn-%C3%AE-production-by-human-intra-thymic-tcd4-and-tcd8-cells-an-ivig-comparative-approach
#15
Fábio da Ressureição Sgnotto, Marília Garcia de Oliveira, Aline Aparecida de Lima Lira, Luciana Bento-de-Souza, Alberto José da Silva Duarte, Jefferson Russo Victor
The regulatory effect of allergic responses induced by IgG antibodies on human intra-thymic cells has not been reported in the literature. The aim of this study was to evaluate the possible differential effect of purified IgG from atopic and non-atopic individuals on human intra-thymic αβT cell cytokine production. Thymic tissues were obtained from 14 patients who were less than seven days old. Additionally, blood samples were collected from atopic and non-atopic volunteers. Thymocytes and peripheral blood mononuclear cells were cultured with purified atopic or non-atopic IgG, and intracellular cytokine production was assessed...
April 25, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28440985/-early-neonatal-sepsis-and-associated-factors
#16
Roberto Anaya-Prado, Cuauhtémoc Valero-Padilla, Augusto Sarralde-Delgado, Jorge Manuel Sánchez-González
BACKGROUND: Early-onset neonatal sepsis (EONS) is an infectious disease of low incidence but high morbidity and mortality with severe consequences to the newborn prognosis. Identifying the associated factors related to EONS allows to start a timely treatment and to take preventive measures. METHODS: In this case and controls study we identified all the newborns (NB) with and without EONS (cases and controls), diagnosed through blood culture in a period of three years...
May 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/28440783/social-vulnerability-and-hypoglycemia-among-patients-with-diabetes
#17
Jorge Waitman, Gabriela Caeiro, Silvana A Romero Gonzalez, Danila P Ré, Andrea Daghero, Claudio D Gonzalez, Guillermo E Umpierrez
Lower-income populations are hit harder by the diabetes epidemic as regards both prevalence and the risk of complications. Food Insecurity is one of the mechanisms through which poverty may predispose people with low socio-economic status to poorer control and higher complication rates. The United Nations Food and Agriculture Organization defined food security as "the right to have access to sufficient nutritional and culturally acceptable food choices." Adults suffering from diabetes with limited income have a 40% greater chance of having food insecurity and an inadequate blood glucose control...
February 2017: Endocrinol Diabetes Nutr
https://www.readbyqxmd.com/read/28440618/design-of-antibacterial-polyethersulfone-membranes-via-covalently-attaching-hydrogel-thin-layers-loaded-with-ag-nanoparticles
#18
Min He, Qian Wang, Rui Wang, Yi Xie, Weifeng Zhao, Changsheng Zhao
In order to inhibit the bacteria attachment and the subsequent formation of bio-films on polyethersulfone (PES) membranes, poly(sulfobetaine methacrylate) (PSBMA)/poly(sodium acrylate) (PAANa) antibacterial hydrogel thin layers were covalently attached onto the membranes, followed by loading Ag nanoparticles. In our strategy, double bonds were firstly introduced onto PES membrane surfaces to provide anchoring sites, and then the hydrogel layers were synthesized on the membrane surfaces via UV light initiated cross-linking copolymerization...
April 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28440494/low-dose-paclitaxel-suppresses-the-induction-of-m2%C3%A2-macrophages-in-gastric-cancer
#19
Takahisa Yamaguchi, Sachio Fushida, Yasuhiko Yamamoto, Tomoya Tsukada, Jun Kinoshita, Katsunobu Oyama, Tomoharu Miyashita, Hidehiro Tajima, Itasu Ninomiya, Seiichi Munesue, Ai Harashima, Shinichi Harada, Hiroshi Yamamoto, Tetsuo Ohta
Tumor-associated macrophages of the M2 phenotype promote tumor proliferation and are associated with a poor prognosis in patients with various malignancies, including gastric cancer with peritoneal dissemination. The present study assessed whether paclitaxel (PTX) suppresses M2 macrophages, by acting as a Toll-like receptor 4 (TLR4) agonist. Macrophages derived from the THP-1 monocytic cell line and peripheral blood mononuclear cell (PBMC)-derived macrophages were cultured with gastric cancer cells in medium containing PTX, at a concentration that did not affect cell proliferation...
April 19, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28440484/expression-of-programmed-cell-death1-in-t-follicular-helper-cells-is-regulated-by-prostaglandin-e2-secreted-by-hbv-infected-hepg2-2-1-5-cells
#20
Zhefeng Sui, Ying Shi, Zhiling Gao, Deguang Yang, Zhihao Wang
The present study aimed to investigate the distribution of T follicular helper (Tfh)-cell subsets in patients with hepatitis B virus (HBV) and determine the underlying mechanism of HBV regulation of Tfh cells. The frequency of peripheral blood Tfh subsets was analyzed using flow cytometry. The expression level of programmed cell death‑1 (PD‑1) and prostaglandin E2 (PGE2) was quantified using reverse transcription‑quantitative polymerase chain reaction and western blotting. The PGE2 level in culture supernatant was detected using enzyme‑linked immunosorbent assay...
April 24, 2017: Molecular Medicine Reports
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