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https://www.readbyqxmd.com/read/29050879/one-pot-synthesis-of-gdp-l-fucose-by-a-four-enzyme-cascade-expressed-in-lactococcus-lactis
#1
Ling Li, Seul-Ah Kim, Ji Eun Heo, Tae-Jip Kim, Jin-Ho Seo, Nam Soo Han
GDP-L-fucose is an L-fucose donor to synthesize fucosylated compounds such as human milk oligosaccharides or Lewis antigen. In this study, we used Lactococcus lactis subsp. cremoris NZ9000 to express 4 enzymes, ManB, ManC, Gmd, and WcaG and produced GDP-L-fucose by using one-pot synthesis method with mannose-6-phosphate as substrate and the enzymes as biocatalyst. For preparation of enzyme mixture, 4 genes (manB, manC, gmd, and wcaG) cloned from Escherichia coli were transformed into L. lactis strains using pNZ8008 and the recombinant cell lysates were obtained after cultivation...
October 16, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/29032641/cholic-acid-attenuate-er-stress-induced-cell-death-in-coxsackievirus-b3-infection
#2
Jae-Young Han, Hae In Jeong, Cheol-Woo Park, Jisoo Yoon, Jaeyoung Ko, Sang-Jip Nam, Byung-Kwan Lim
Coxsackievirus Type B3 (CVB3) is an enterovirus that belongs to the Picornaviridae and causes of various diseases such as myocarditis and hand-foot-mouth diseases. But effective antiviral drug was still not developed. In this study, we looking for potential inhibitors of CVB3 replication by examining survival of CVB3-infected HeLa cells. We detected an antiviral effect of cholic acid and identified it as a candidate inhibitor of CVB3 replication. Cholic acid circulates in the liver and intestines, and it helps digestion and absorption of lipids in small intestine...
October 14, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28989492/encouraging-practitioners-in-infection-prevention-and-control-to-publish-a-cross-sectional-survey
#3
Lynn Melone, Lesley Price, Jennie Wilson
AIM: The aim of this cross-sectional survey was to determine the views of infection prevention and control practitioners (IPCPs) on publishing research. METHODS: A convenience sample was obtained by approaching delegates at the 2015 Infection Prevention Society conference and data were captured via a hand-held electronic device. FINDINGS: Of the 79 respondents, most (83%) read the Journal of Infection Prevention (JIP) and found it useful for informing their practice (72%)...
November 2016: Journal of Infection Prevention
https://www.readbyqxmd.com/read/28963922/risk-of-maternal-fetal-and-neonatal-complications-associated-with-the-use-of-the-transcervical-balloon-catheter-in-induction-of-labour-a-systematic-review
#4
REVIEW
Jip S M Gommers, Milou Diederen, Chris Wilkinson, Deborah Turnbull, Ben W J Mol
Induction of labour is one of the most frequently applied obstetrical interventions globally. Many studies have compared the use of balloon catheters with pharmacological agents. Although the safety of the balloon catheter is often mentioned, little has been written about the total spectrum of maternal and fetal morbidity associated with induction of labour using a balloon catheter. We evaluated the safety of labour induction with a transcervical balloon catheter by conducting a literature review with pooled risk assessments of the maternal, fetal and neonatal morbidity...
November 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28916623/efficacy-of-radioembolization-with-holmium-166-microspheres-in-salvage-patients-with-liver-metastases-a-phase-2-study
#5
Jip F Prince, Maurice A A J van den Bosch, J F W Nijsen, Maarten L J Smits, Andor F van den Hoven, Stavros Nikolakopoulos, Frank J Wessels, Rutger C G Bruijnen, Manon Braat, Bernard A Zonnenberg, Marnix Lam
Rationale: Radioembolization of liver malignancies with holmium-166 (166Ho) microspheres has been shown safe in a phase 1 dose-escalation study. The purpose of this study was to investigate the efficacy of 166Ho radioembolization. Methods: In this prospective single-arm study, 56 patients were enrolled, all with liver metastases refractory to systemic therapy and ineligible for surgical resection. Radioembolization was performed with a projected average absorbed dose of 60 Gy to the liver (equal to 3.8 GBq/kg liver tissue)...
September 15, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28905705/mucilaginibacter-terrae-sp-nov-isolated-from-antarctic-soil
#6
Ivo Sedláček, Roman Pantůček, Stanislava Králová, Ivana Mašlaňová, Pavla Holochová, Eva Staňková, Roman Sobotka, Miloš Barták, Hans-Jürgen Busse, Pavel Švec
A bacterial strain designated CCM 8645T was isolated from a soil sample collected nearby a mummified seal carcass in the northern part of James Ross Island, Antarctica. The cells were short rods, Gram-stain-negative, non-motile, catalase and oxidase positive, and produced a red-pink pigment on R2A agar. A polyphasic taxonomic approach based on 16S rRNA gene sequencing, extensive biotyping using conventional tests and commercial identification kits and chemotaxonomic analyses were applied to clarify its taxonomic position...
September 14, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28853141/influence-of-tumor-response-and-treatment-schedule-on-the-distribution-of-tumor-recurrence-in-esophageal-cancer-patients-treated-with-neoadjuvant-chemoradiotherapy
#7
Kristien M Jipping, Jan Binne Hulshoff, Evita A van Amerongen, Tim I Bright, David I Watson, John Th M Plukker
BACKGROUND AND OBJECTIVES: The impact of different neoadjuvant chemoradiotherapy (nCRT) schedules and pathologic complete response (pCR) on the distribution of recurrence is unclear in esophageal cancer (EC). We assessed the effect of pCR and nCRT schedule in EC. METHODS: Patients with T1N+/T2-4aN0-3/M0 EC treated in different centers, with either carboplatin/paclitaxel/41.4 Gy (CROSS: n = 134) or Cisplatin/5-fluorouracil/45-50.4 Gy (Cis/5FU: n = 88) followed by surgery were included...
August 29, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28771166/saccharomonopyrones-a-c-new-%C3%AE-pyrones-from-a-marine-sediment-derived-bacterium-saccharomonospora-sp-cnq-490
#8
Chae-Yoon Yim, Tu Cam Le, Tae Gu Lee, Inho Yang, Hansol Choi, Jusung Lee, Kyung-Yun Kang, Jin Sil Lee, Kyung-Min Lim, Sung-Tae Yee, Heonjoong Kang, Sang-Jip Nam, William Fenical
Intensive study of the organic extract of the marine-derived bacterium Saccharomonospora sp. CNQ-490 has yielded three new α-pyrones, saccharomonopyrones A-C (1-3). The chemical structures of these compounds were assigned from the interpretation of 1D, 2D NMR and mass spectrometry data. Saccharomonopyrone A (1) is the first α-pyrone microbial natural product bearing the ethyl-butyl ether chain in the molecule, while saccharomonopyrones B and C possess unusual 3-methyl and a 6-alkyl side-chain within a 3,4,5,6-tetrasubstituted α-pyrone moiety...
August 3, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28749137/identification-of-antiangiogenic-potential-and-cellular-mechanisms-of-napyradiomycin-a1-isolated-from-the-marine-derived-streptomyces-sp-yp127
#9
Ji Sun Hwang, Geum Jin Kim, Hyun Gyu Choi, Min Cheol Kim, Dongyup Hahn, Joo-Won Nam, Sang-Jip Nam, Hak Choel Kwon, Jungwook Chin, Sung Jin Cho, Hayoung Hwang, Hyukjae Choi
Angiogenesis is the process of new blood vessel formation. Excessive angiogenesis is a critical factor in the progression of cancer, macular degeneration, and other chronic inflammatory diseases. When investigating the effects of crude extracts of cultured marine microorganisms, an extract of the cultured Streptomyces sp. YP127 strain was found to inhibit human umbilical vein endothelial cell (HUVEC) tube formation. Bioassay-guided fractionation and spectroscopic data analyses led to the identification of napyradiomycin A1 (1) as an antiangiogenic component of the extract...
August 25, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28593746/long-term-measurements-of-chlorophyll-a-fluorescence-using-the-jip-test-show-that-combined-abiotic-stresses-influence-the-photosynthetic-performance-of-the-perennial-ryegrass-lolium-perenne-in-a-managed-temperate-grassland
#10
Anthony Digrado, Aurélie Bachy, Ahsan Mozaffar, Niels Schoon, Filippo Bussotti, Crist Amelynck, Anne-Catherine Dalcq, Marie-Laure Fauconnier, Marc Aubinet, Bernard Heinesch, Patrick du Jardin, Pierre Delaplace
Several experiments have highlighted the complexity of stress interactions involved in plant response. The impact in field conditions of combined environmental constraints on the mechanisms involved in plant photosynthetic response, however, remains understudied. In a long-term field study performed in a managed grassland, we investigated the photosynthetic apparatus response of the perennial ryegrass (Lolium perenne L.) to environmental constraints and its ability to recover and acclimatize. Frequent field measurements of chlorophyll a fluorescence (ChlF) were made in order to determine the photosynthetic performance response of a population of L...
June 8, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28566484/response-of-bats-to-light-with-different-spectra-light-shy-and-agile-bat-presence-is-affected-by-white-and-green-but-not-red-light
#11
Kamiel Spoelstra, Roy H A van Grunsven, Jip J C Ramakers, Kim B Ferguson, Thomas Raap, Maurice Donners, Elmar M Veenendaal, Marcel E Visser
Artificial light at night has shown a remarkable increase over the past decades. Effects are reported for many species groups, and include changes in presence, behaviour, physiology and life-history traits. Among these, bats are strongly affected, and how bat species react to light is likely to vary with light colour. Different spectra may therefore be applied to reduce negative impacts. We used a unique set-up of eight field sites to study the response of bats to three different experimental light spectra in an otherwise dark and undisturbed natural habitat...
May 31, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28539221/lodopyridones-b-and-c-from-a-marine-sediment-derived-bacterium-saccharomonospora-sp
#12
Tu Cam Le, Chae-Yoon Yim, Songhee Park, Nikita Katila, Inho Yang, Myoung Chong Song, Yeo Joon Yoon, Dong-Young Choi, Hyukjae Choi, Sang-Jip Nam, William Fenical
HPLC-UV guided isolation of the culture broth of a marine bacterium Saccharomonospora sp. CNQ-490 has led to the isolation of two new natural products, lodopyridones B and C (1 and 2) along with the previously reported lodopyridone A (3). Their chemical structures were established from the interpretation of 2D NMR spectroscopic data and the comparison of NMR data with the lodopyridone A (3). Lodopyridones B and C (1 and 2) possess the thiazole, and chloroquinoline groups which are characteristic features of these molecules...
July 15, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28505073/anti-pigmentary-effect-of-4-hydroxysattabacin-from-the-marine-derived-bacterium-bacillus-sp
#13
Kyuri Kim, Alain S Leutou, Haein Jeong, Dayoung Kim, Chi Nam Seong, Sang-Jip Nam, Kyung-Min Lim
Bioactivity-guided isolation of a crude extract from a culture broth of Bacillus sp. has led to the isolation of (-)-4-hydroxysattabacin (1). The inhibitory effect of (-)-4-hydroxysattabacin (1) was investigated on melanogenesis in the murine melanoma cell line, B16F10, and human melanoma cell line, MNT-1, as well as a pigmented 3D-human skin model. (-)-4-Hydroxysattabacin treatment decreased melanin contents in a dose-dependent manner in α-melanocyte stimulating hormone (α-MSH)-stimulated B16F10 cells. Quantitative real time PCR (qRT-PCR) demonstrated that treatment with (-)-4-hydroxysattabacin down-regulated several melanogenic genes, including tyrosinase, tyrosinase-related protein 1 (TRP-1), and tyrosinase-related protein 2 (TRP-2) while their enzymatic activities were unaffected...
May 13, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28433723/elimination-of-the-cryptic-plasmid-in-leuconostoc-citreum-by-crispr-cas9-system
#14
Ye-Ji Jang, Seung-Oh Seo, Seul-Ah Kim, Ling Li, Tae-Jip Kim, Sun Chang Kim, Yong-Su Jin, Nam Soo Han
Leuconostoc spp. are important lactic acid bacteria for the fermentation of foods. In particular, L. citreum strains isolated from various foods have been used as host strains for genetic and metabolic engineering studies. In order to develop a food-grade genetic engineering system, L. citreum CB2567 was isolated from Kimchi. However, the isolated bacterium contained a cryptic plasmid which was difficult to eliminate. As the existence of the plasmid might hinder strain engineering, we eliminated the plasmid using an RNA-guided DNA endonuclease CRISPR/Cas9 system...
April 19, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28405638/a-two-photon-fluorescent-probe-for-specific-detection-of-hydrogen-sulfide-based-on-a-familiar-esipt-fluorophore-bearing-aie-characteristics
#15
Liyan Chen, Di Wu, Chang Su Lim, Dayoung Kim, Sang-Jip Nam, Woolin Lee, Gyungmi Kim, Hwan Myung Kim, Juyoung Yoon
Hydrogen sulfide (H2S) is a signaling gasotransmitter, which plays various roles in modulating the functions of different systems. In this study, a "turn-on" fluorescent probe for H2S was developed. The probe, whose design is based on a familiar excited state intramolecular proton transfer (ESIPT) fluorophore bearing aggregation-induced emission (AIE) characteristics, was found to exhibit an 80-fold fluorescence enhancement along with a large Stokes shift upon the addition of H2S. Furthermore, the probe was successfully utilized to detect H2S in HeLa cells with both one-photon and two-photon microscopy...
April 13, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28365471/biosynthetic-pathways-of-aminoglycosides-and-their-engineering
#16
REVIEW
Je Won Park, Yeon Hee Ban, Sang-Jip Nam, Sun-Shin Cha, Yeo Joon Yoon
Despite decades long clinical usage, aminoglycosides still remain a valuable pharmaceutical source for fighting Gram-negative bacterial pathogens, and their newly identified bioactivities are also renewing interest in this old class of antibiotics. As Nature's gift, some aminoglycosides possess natural defensive structural elements that can circumvent drug resistance mechanisms. Thus, a detailed understanding of aminoglycoside biosynthesis will enable us to apply Nature's biosynthetic strategy towards expanding structural diversity in order to produce novel and more robust aminoglycoside analogs...
March 30, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28282745/overuse-wrist-injuries-in-young-athletes-what-do-sports-physicians-consider-important-signals-and-functional-limitations
#17
Laura S Kox, P Paul F M Kuijer, Jip Opperman, Gino M M J Kerkhoffs, Mario Maas, Monique H W Frings-Dresen
This study's objective was to collect items from experienced sports physicians, relating to the presence and severity of overuse wrist injuries in young athletes, for developing a measurement instrument for signals of overuse wrist injury. Seven Dutch elite sports physicians involved in guidance and treatment of young athletes in wrist-loading sports (gymnastics, tennis, judo, field hockey, volleyball and rowing) participated in a focus group. They discussed signals and limitations related to overuse wrist injuries in young athletes...
February 21, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28120195/heterologous-expression-and-enzymatic-characterization-of-%C3%AE-glutamyltranspeptidase-from-bacillus-amyloliquefaciens
#18
COMPARATIVE STUDY
Jung-Min Lee, Jaejung Lee, Gyeong-Hwa Nam, Byung-Sam Son, Myoung-Uoon Jang, So-Won Lee, Byung-Serk Hurh, Tae-Jip Kim
γ-Glutamyltranspeptidase (GGT) catalyzes the cleavage of γ-glutamyl compounds and the transfer of γ-glutamyl moiety to water or to amino acid/peptide acceptors. GGT can be utilized for the generation of γ-glutamyl peptides or glutamic acid, which are used as food taste enhancers. In the present study, Bacillus amyloliquefaciens SMB469 with high GGT activity was isolated from Doenjang, a traditional fermented soy food of Korea. The gene encoding GGT from B. amyloliquefaciens SMB469 (BaGGT469) was cloned from the isolate, and heterologously expressed in E...
February 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28099100/lung-shunting-an-indicator-of-survival-but-not-necessarily-a-tool-for-selecting-patients-for-radioembolization
#19
Maarten L J Smits, Remco Bastiaannet, Jip F Prince, Hugo W A M de Jong, Maurice A A J van den Bosch, Marnix G E H Lam
No abstract text is available yet for this article.
February 2017: Radiology
https://www.readbyqxmd.com/read/28095865/engineered-biosynthesis-of-milbemycins-in-the-avermectin-high-producing-strain-streptomyces-avermitilis
#20
Myoun-Su Kim, Wan-Je Cho, Myoung Chong Song, Seong-Whan Park, Kaeun Kim, Eunji Kim, Naryeong Lee, Sang-Jip Nam, Ki-Hoon Oh, Yeo Joon Yoon
BACKGROUND: Milbemycins, produced from Streptomyces hygroscopicus subsp. aureolacrimosus and Streptomyces bingchenggensis, are 16-membered macrolides that share structural similarity with avermectin produced from Streptomyces avermitilis. Milbemycins possess strong acaricidal, insecticidal, and anthelmintic activities but low toxicity. Due to the high commercial value of the milbemycins and increasing resistance to the avermectins and their derivatives, it is imperative to develop an efficient combinatorial biosynthesis system exploiting an overproduction host strain to produce the milbemycins and novel analogs in large quantities...
January 17, 2017: Microbial Cell Factories
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