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https://www.readbyqxmd.com/read/28643181/promoting-acid-resistance-and-nisin-yield-of-lactococcus-lactis-f44-by-genetically-increasing-d-asp-amidation-level-inside-cell-wall
#1
Panlong Hao, Dongmei Liang, Lijie Cao, Bin Qiao, Hao Wu, Qinggele Caiyin, Hongji Zhu, Jianjun Qiao
Nisin fermentation by Lactococcus lactis requires a low pH to maintain a relatively higher nisin activity. However, the acidic environment will result in cell arrest, and eventually decrease the relative nisin production. Hence, constructing an acid-resistant L. lactis is crucial for nisin harvest in acidic nisin fermentation. In this paper, the first discovery of the relationship between D-Asp amidation-associated gene (asnH) and acid resistance was reported. Overexpression of asnH in L. lactis F44 (F44A) resulted in a sevenfold increase in survival capacity during acid shift (pH 3) and enhanced nisin desorption capacity compared to F44 (wild type), which subsequently contributed to higher nisin production, reaching 5346 IU/mL, 57...
June 22, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28643089/time-lapse-observation-and-transcriptome-analysis-of-a-case-with-repeated-multiple-pronuclei-after-ivf-icsi
#2
J Dai, L Z Leng, C F Lu, F Gong, S P Zhang, W Zheng, G X Lu, G Lin
PURPOSE: The purpose of this study was to investigate the cause of repeated multipronucleus (MPN) formation in zygotes in a patient after both in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI). METHOD: This is a case study. A patient had unexplained primary infertility with recurring total MPN zygotes after IVF and ICSI cycles. Time-lapse monitoring of pronucleus formation was carried out. Embryos developed from MPN zygotes were analyzed by fluorescence in situ hybridization (FISH)...
June 22, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28642840/cytolethal-distending-toxin-enhances-radiosensitivity-in-prostate-cancer-cells-by-regulating-autophagy
#3
Hwai-Jeng Lin, Hsin-Ho Liu, Chia-Der Lin, Min-Chuan Kao, Yu-An Chen, Chuan Chiang-Ni, Zhi-Pei Jiang, Mei-Zi Huang, Chun-Jung Lin, U-Ging Lo, Li-Chiung Lin, Cheng-Kuo Lai, Ho Lin, Jer-Tsong Hsieh, Cheng-Hsun Chiu, Chih-Ho Lai
Cytolethal distending toxin (CDT) produced by Campylobacter jejuni contains three subunits: CdtA, CdtB, and CdtC. Among these three toxin subunits, CdtB is the toxic moiety of CDT with DNase I activity, resulting in DNA double-strand breaks (DSB) and, consequently, cell cycle arrest at the G2/M stage and apoptosis. Radiation therapy is an effective modality for the treatment of localized prostate cancer (PCa). However, patients often develop radioresistance. Owing to its particular biochemical properties, we previously employed CdtB as a therapeutic agent for sensitizing radioresistant PCa cells to ionizing radiation (IR)...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28642062/lrh-1-senses-signaling-from-phosphatidylcholine-to-regulate-the-expansion-growth-of-digestive-organs-via-synergy-with-wnt-%C3%AE-catenin-signaling-in-zebrafish
#4
Gang Zhai, Jia Song, Tingting Shu, Junjun Yan, Xia Jin, Jiangyan He, Zhan Yin
Liver receptor homolog-1 (LRH-1) is an orphan nuclear receptor that is critical for the growth and proliferation of cancer cells and other biological processes, including lipid transportation and metabolism, sexual determination and steroidogenesis. However, because homozygous lrh-1(-/-) mice die in utero, the regulatory mechanisms involved in embryonic development mediated by this receptor are poorly understood. In the present study, we performed transcription activator-like effector nuclease (TALEN)-mediated loss-of-function assays, taking advantage of zebrafish external fertilization, to investigate the function of lrh-1...
April 27, 2017: Journal of Genetics and Genomics, Yi Chuan Xue Bao
https://www.readbyqxmd.com/read/28641984/bi-objective-approach-for-placing-ground-and-air-ambulance-base-and-helipad-locations-in-order-to-optimize-ems-response
#5
Milad Shahriari, Ali Bozorgi-Amiri, Shayan Tavakoli, Abolghasem Yousefi-Babadi
Shortening the travel time of patient transfer has clinical implications for many conditions such as cardiac arrest, trauma, stroke and STEMI. As resources are often limited precise calculations are needed. In this paper we consider the location problem for both ground and aerial emergency medical services. Given the uncertainty of when patients are in need of prompt medical attention we consider these demand points to be uncertain. We consider various ways in which ground and helicopter ambulances can work together to make the whole process go faster...
June 15, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28641713/assessment-tools-for-use-during-anesthesia-centric-pediatric-advanced-life-support-training-and-evaluation
#6
Scott C Watkins, Paul J Nietert, Elisabeth Hughes, Eric T Stickles, Tracy E Wester, Matthew D McEvoy
BACKGROUND: Pediatric perioperative cardiac arrests are rare events that require rapid, skilled and coordinated efforts to optimize outcomes. We developed an assessment tool for assessing clinician performance during perioperative critical events termed Anesthesia-centric Pediatric Advanced Life Support (A-PALS). Here, we describe the development and evaluation of the A-PALS scoring instrument. METHODS: A group of raters scored videos of a perioperative team managing simulated events representing a range of scenarios and competency...
June 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/28641010/alpha-mangostin-reverses-multidrug-resistance-by-attenuating-the-function-of-the-multidrug-resistance-linked-abcg2-transporter
#7
Chung-Pu Wu, Sung-Han Hsiao, Megumi Murakami, Yu-Jen Lu, Yan-Qing Li, Yang-Hui Huang, Tai-Ho Hung, Suresh V Ambudkar, Yu-Shan Wu
The ATP-binding cassette (ABC) drug transporter ABCG2 can actively efflux a wide variety of chemotherapeutic agents out of cancer cells and subsequently reduce the intracellular accumulation of these drugs. Therefore, the overexpression of ABCG2 often contributes to the development of multidrug resistance (MDR) in cancer cells, which is one of the major obstacles to successful cancer chemotherapy. Moreover, ABCG2 is highly expressed in various tissues including the intestine and blood-brain barrier (BBB), limiting the absorption and bioavailability of many therapeutic agents...
June 22, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28638618/swyer-james-macleod-syndrome-a-rare-diagnosis-presented-through-two-adult-patients
#8
Sumit Mehra, Thilini Basnayake, Henrik Falhammar, Subash Heraganahally, Suryakant Tripathi
Swyer-James-MacLeod syndrome (SJMS) is a rare syndrome of acute obliterative bronchiolitis following an early childhood infective insult to the lungs. This causes arrest of alveolarization, affecting lung development with hypoplasia of the ipsilateral pulmonary artery and results in a characteristic radiological pattern, such as a unilateral hyperlucent lung with expiratory air-trapping and pruned-tree appearance on pulmonary angiogram. The clinical presentation is either recurrent chest infections, exertional dyspnoea or it may be an incidental finding...
September 2017: Respirology Case Reports
https://www.readbyqxmd.com/read/28637896/technical-advance-new-in-vitro-method-for-assaying-the-migration-of-primary-b-cells-using-an-endothelial-monolayer-as-substrate
#9
Phillip J Stewart-Hutchinson, Taylor P Szasz, Emily R Jaeger, Michael D Onken, John A Cooper, Sharon Celeste Morley
Migration of B cells supports their development and recruitment into functional niches. Therefore, defining factors that control B cell migration will lead to a better understanding of adaptive immunity. In vitro cell migration assays with B cells have been limited by poor adhesion of cells to glass coated with adhesion molecules. We have developed a technique using monolayers of endothelial cells as the substrate for B cell migration and used this technique to establish a robust in vitro assay for B cell migration...
June 21, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28636430/when-is-embryonic-arrest-broken-in-turtle-eggs
#10
Sean A Williamson, Roger G Evans, Richard D Reina
Turtle embryos enter a state of arrested development in the oviduct, allowing the mother greater flexibility in her reproductive schedule. Development recommences once eggs transition from the hypoxic oviduct to the normoxic nest. Significant mortality can occur if turtle eggs are moved between 12 h and 20 d after oviposition, and this is linked to the recommencement of embryonic development. To better understand the timing of developmental arrest and to determine how movement-induced mortality might be avoided, we determined the latency (i...
September 2017: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/28635679/the-role-of-angiogenesis-in-cancer-treatment
#11
REVIEW
Mehdi Rajabi, Shaker A Mousa
A number of anti-angiogenesis drugs have been FDA-approved and are being used in cancer treatment, and a number of other agents are in different stages of clinical development or in preclinical evaluation. However, pharmacologic anti-angiogenesis strategies that arrest tumor progression might not be enough to eradicate tumors. Decreased anti-angiogenesis activity in single mechanism-based anti-angiogenic strategies is due to the redundancy, multiplicity, and development of compensatory mechanism by which blood vessels are remodeled...
June 21, 2017: Biomedicines
https://www.readbyqxmd.com/read/28635361/role-of-licochalcone-a-in-vegf-induced-proliferation-of-human-airway-smooth-muscle-cells-implications-for-asthma
#12
Sung-Ho Kim, Qing-Mei Pei, Ping Jiang, Min Yang, Xue-Jiao Qian, Jiang-Bo Liu
Asthma is a chronic respiratory disease characterized by reversible airway obstruction with persistent airway inflammation and airway remodeling, which is associated with increased airway smooth muscle (ASM) mass. Licochalcone A is the predominant characteristic chalcone in licorice root. We found that licochalcone A inhibited vascular endothelial growth factor (VEGF)-induced ASM cell proliferation and induced cell cycle arrest. Additionally, VEGF-induced ASM cell proliferation was suppressed via inhibition of extracellular signal-regulated kinase 1/2 (ERK1/2) activity, but not that of Akt...
February 2017: Growth Factors
https://www.readbyqxmd.com/read/28634273/the-c-elegans-vapb-homolog-vpr-1-is-a-permissive-signal-for-gonad-development
#13
Pauline A Cottee, Tim Cole, Jessica Schultz, Hieu D Hoang, Jack Vibbert, Sung Min Han, Michael A Miller
VAMP/synaptobrevin-associated proteins (VAPs) contain an N-terminal major sperm protein domain (MSPd) that is associated with amyotrophic lateral sclerosis. VAPs have an intracellular housekeeping function, as well as an extracellular signaling function mediated by the secreted MSPd. Here we show that the C. elegans VAP homolog VPR-1 is essential for gonad development. vpr-1 null mutants are maternal effect sterile due to arrested gonadogenesis following embryo hatching. Somatic gonadal precursor cells and germ cells fail to proliferate fully and complete their respective differentiation programs...
June 15, 2017: Development
https://www.readbyqxmd.com/read/28632727/post-translational-regulation-contributes-to-the-loss-of-lkb1-expression-through-sirt1-deacetylase-in-osteosarcomas
#14
Nadège Presneau, Laure Alice Duhamel, Hongtao Ye, Roberto Tirabosco, Adrienne M Flanagan, Malihe Eskandarpour
BACKGROUND: The most prevalent form of bone cancer is osteosarcoma (OS), which is associated with poor prognosis in case of metastases formation. Mice harbouring liver kinase B1 (LKB1(+/-)) develop osteoblastoma-like tumours. Therefore, we asked whether loss of LKB1 gene has a role in the pathogenesis of human OS. METHODS: Osteosarcomas (n=259) were screened for LKB1 and sirtuin 1 (SIRT1) protein expression using immunohistochemistry and western blot. Those cases were also screened for LKB1 genetic alterations by next-generation sequencing, Sanger sequencing, restriction fragment length polymorphism and fluorescence in situ hybridisation approaches...
June 20, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28631920/microfluidic-mapping-of-cancer-cell-protein-binding-interaction
#15
Zongbin Liu, Xin Han, Rui Chen, Kai Zhang, Ying Li, Shelby Fruge, Joon Hee Jang, Yuan Ma, Lidong Qin
The interaction between tumor cells and microenvironment during metastasis is mediated by the binding of cell surface receptors, such as integrins and selectins, with protein ligands. Delineation of their binding interaction and identification of key receptors may be particularly important both in understanding ECM remodeling and in developing potential therapeutic targets. Here we present a microfluidic chip that allows qualitative and quantitative mapping of large population cell-protein interaction. It was found that β1 integrin showed stronger binding interaction with collagen than with other ECM proteins...
June 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28631089/targeted-temperature-management-in-the-icu-guidelines-from-a-french-expert-panel
#16
REVIEW
Alain Cariou, Jean-François Payen, Karim Asehnoune, Gerard Audibert, Astrid Botte, Olivier Brissaud, Guillaume Debaty, Sandrine Deltour, Nicolas Deye, Nicolas Engrand, Gilles Francony, Stéphane Legriel, Bruno Levy, Philippe Meyer, Jean-Christophe Orban, Sylvain Renolleau, Bernard Vigue, Laure De Saint Blanquat, Cyrille Mathien, Lionel Velly
Over the recent period, the use of induced hypothermia has gained an increasing interest for critically ill patients, in particular in brain-injured patients. The term "targeted temperature management" (TTM) has now emerged as the most appropriate when referring to interventions used to reach and maintain a specific level temperature for each individual. TTM may be used to prevent fever, to maintain normothermia, or to lower core temperature. This treatment is widely used in intensive care units, mostly as a primary neuroprotective method...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28630100/nlrp2-and-faf1-deficiency-blocks-early-embryogenesis-in-the-mouse
#17
Hui Peng, Hai-Jun Liu, Fang Liu, Yuyun Gao, Jing Chen, Jianchao Huo, Jinglin Han, Tianfang Xiao, Wenchang Zhang
Nlrp2 is a maternal effect gene specifically expressed by mouse ovaries; deletion of this gene from zygotes is known to result in early embryonic arrest. In the present study, we identified FAF1 protein as a specific binding partner of the NLRP2 protein in both mouse oocytes and preimplantation embryos. In addition to early embryos, both Faf1 mRNA and protein were detected in multiple tissues. NLRP2 and FAF1 proteins were co-localized to both the cytoplasm and nucleus during the development of oocytes and preimplantation embryos...
June 19, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28629311/cell-cycle-arrest-and-apoptosis-induction-activity-of-nitidine-chloride-on-acute-myeloid-leukemia-cells
#18
Peng Li, Shuxin Yan, Xin Dong, Zhao Li, Yu Qiu, Chunyan Ji, Jingru Zhang, Min Ji, Wei Li, Hongchun Wang, Zhi Liu, Xing Li Wang, Jingjing Ye, Daoxin Ma
: Background: Acute myeloid leukemia (AML) is the most common hematological malignancy in adults, characterized by distorted proliferation and development of myeloid cells and their precursors in the bone marrow. Nitidine chloride, a naturally occurring alkaloid, has been identified to possess antitumor activity. However, the effects of nitidine chloride on acute myeloid leukemia cells and its underlying mechanisms have not been elucidated. Here we investigated the cellular and molecular mechanism of the anti-leukemic effects of nitidine chloride...
June 19, 2017: Medicinal Chemistry
https://www.readbyqxmd.com/read/28628854/prevalence-and-predictors-of-hcv-among-a-cohort-of-opioid-treatment-patients-in-dar-es-salaam-tanzania
#19
Barrot H Lambdin, Jennifer Lorvick, Jessie K Mbwambo, John Rwegasha, Saria Hassan, Paula Lum, Alex H Kral
BACKGROUND: The government of Tanzania launched an opioid treatment program (OTP), using methadone, in Dar es Salaam in February of 2011. Hepatitis C virus (HCV) is a leading cause of morbidity and mortality globally, especially among people who inject drugs (PWID). We conducted a cross-sectional study among PWID engaged in OTP in Dar es Salaam to describe the prevalence and predictors of HCV antibody serostatus. METHODS: Routine programmatic data on patients enrolled in Muhimbili National Hospital's OTP clinic from February 2011 to January 2013 were utilized...
June 16, 2017: International Journal on Drug Policy
https://www.readbyqxmd.com/read/28628833/urtica-dioica-extract-suppresses-mir-21-and-metastasis-related-genes-in-breast-cancer
#20
Behzad Mansoori, Ali Mohammadi, Shahriar Hashemzadeh, Solmaz Shirjang, Ali Baradaran, Milad Asadi, Mohammad Amin Doustvandi, Behzad Baradaran
BACKGROUND: Breast cancer has a high prevalence among women worldwide. Tumor invasion and metastasis still remains an open issue that causes most of the therapeutic failures and remains the prime cause of patient mortality. Hence, there is an unmet need to develop the most effective therapeutic approach with the lowest side effects and highest cytotoxicity that will effectively arrest or eradicate metastasis. METHODS: An MTT assay and scratch test were used to assess the cytotoxicity and migration effects of Urtica dioica on the breast cancer cells...
June 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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