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Pavels Semjonovs, Maija Ruklisha, Longina Paegle, Madara Saka, Rita Treimane, Marite Skute, Linda Rozenberga, Laura Vikele, Martins Sabovics, Ilse Cleenwerck
Isolate B17 from Kombucha was estimated to be an efficient producer of bacterial cellulose (BC). The isolate was deposited under the number P 1463 and identified as Komagataeibacter rhaeticus by comparing a generated amplified fragment length polymorphism (AFLP™) DNA fingerprint against a reference database. Static cultivation of the K. rhaeticus strain P 1463 in Hestrin and Schramm (HS) medium resulted in 4.40 ± 0.22 g/L BC being produced, corresponding to a BC yield from glucose of 25.30 ± 1.78 %, when the inoculum was made with a modified HS medium containing 10 g/L glucose...
September 27, 2016: Applied Microbiology and Biotechnology
Lenka Micenková, Juraj Bosák, Martin Vrba, Alena Ševčíková, David Šmajs
BACKGROUND: The study used a set of 407 human extraintestinal pathogenic E. coli strains (ExPEC) isolated from (1) skin and soft tissue infections, (2) respiratory infections, (3) intra-abdominal infections, and (4) genital smears. The set was tested for bacteriocin production, for prevalence of bacteriocin and virulence determinants, and for phylogenetic typing. Results obtained from the group of ExPEC strains were compared to data from our previously published analyses of 1283 fecal commensal E...
2016: BMC Microbiology
Monika Swiontek, Kamil Rozniakowski, Justyna Fraczyk, Wojciech Lipinski, Krystian Galecki, Stanislaw Wysocki, Bertrand G R Dupont, Zbigniew J Kaminski, Beata Kolesinska
AIM: To identify the shortest components of A13-A19, B12-B17 fragments capable for fibrillation and to validate the dependability of aggregation on the presence of hydroxyl group engaged in the 'tyrosine kissing'. MATERIALS & METHODS: Fragments A13-A19 and B12-B17 of insulin and all shortened analogues were obtained by using DMT/NMM/TosO(-) as a coupling reagent. The aggregation was studied by three independent tests. RESULTS: Studies on the susceptibility to aggregation of truncated analogs of insulin amyloidogenic core show three groups of peptides...
August 2016: Nanomedicine
Xu Pang, Li-Ping Kang, Xiao Mei Fang, Yang Zhao, He-Shui Yu, Li-Feng Han, Hai-Tao Li, Li-Xia Zhang, Bao-Lin Guo, Li-Yan Yu, Bai-Ping Ma
A continuous phytochemical study on the roots of Marsdenia tenacissima led to the isolation and identification of 13 new polyoxypregnane glycosides named marstenacissides B10-B17 (1, 2, 4, 7, 8, 11, 12, and 14) and marstenacissides A8-A12 (3, 9, 10, 13, and 15) in addition to two known polyoxypregnane glycosides marsdenosides M and L (5 and 6). Their structures were established by spectroscopic techniques and by comparison with the reported data in the literature. Moreover, the anti-HIV activities of these isolates and the previous isolated marstenacissides A1-A7 and B1-B9 were assessed, some of which exhibited slight or negligible effects against HIV-1...
June 7, 2016: Planta Medica
Sudhakar Pandurangan, Marwan Diapari, Fuqiang Yin, Seth Munholland, Gregory E Perry, B Patrick Chapman, Shangzhi Huang, Francesca Sparvoli, Roberto Bollini, William L Crosby, Karl P Pauls, Frédéric Marsolais
A series of genetically related lines of common bean (Phaseolus vulgaris L.) integrate a progressive deficiency in major storage proteins, the 7S globulin phaseolin and lectins. SARC1 integrates a lectin-like protein, arcelin-1 from a wild common bean accession. SMARC1N-PN1 is deficient in major lectins, including erythroagglutinating phytohemagglutinin (PHA-E) but not α-amylase inhibitor, and incorporates also a deficiency in phaseolin. SMARC1-PN1 is intermediate and shares the phaseolin deficiency. Sanilac is the parental background...
2016: Frontiers in Plant Science
M Ulloa, C Wang, S Saha, R B Hutmacher, D M Stelly, J N Jenkins, J Burke, P A Roberts
Chromosome substitution (CS) lines in plants are a powerful genetic resource for analyzing the contribution of chromosome segments to phenotypic variance. In this study, a series of interspecific cotton (Gossypium spp.) CS lines were used to identify a new germplasm resource, and to validate chromosomal regions and favorable alleles associated with nematode or fungal disease resistance traits. The CS lines were developed in the G. hirsutum L. TM-1 background with chromosome or chromosome segment substitutions from G...
April 2016: Genetica
Anett Kristin Larsen, Jacques Godfroid, Ingebjørg Helena Nymo
BACKGROUND: Marine Brucella spp. have been isolated from numerous pinniped and cetacean species, but pathological findings in association with infection with Brucella pinnipedialis in pinnipeds have been sparse. The capacity of brucellae to survive and replicate within host macrophages underlies their important ability to produce chronic infections, but previous work has shown that B. pinnipedialis spp. are rapidly eliminated from hooded seal (Cystophora cristata) alveolar macrophages...
2016: Acta Veterinaria Scandinavica
Hae-Sook Shon, Hwa Young Choi, Jang Rak Kim, So Yeon Ryu, Youn-Jae Lee, Myeong Jin Lee, Hyun Ju Min, Jun Lee, Yeong Jun Song, Moran Ki
BACKGROUND/AIMS: This study compared the prevalence of hepatitis C virus (HCV) infection in the Republic of Korea and estimated the high-risk regions and towns. METHODS: National Health Insurance Service data for 8 years from 2005 to 2012 were used. The subjects of the study had visited medical facilities and been diagnosed with or received treatment for acute or chronic HCV as a primary or secondary disease according to ICD-10 codes of B17.1 or B18.2, respectively...
September 2015: Clinical and Molecular Hepatology
Courtney L Cox, James R Doroghazi, Douglas A Mitchell
BACKGROUND: Ribosomally synthesized and post-translationally modified peptides (RiPPs) are a burgeoning class of natural products with diverse activity that share a similar origin and common features in their biosynthetic pathways. The precursor peptides of these natural products are ribosomally produced, upon which a combination of modification enzymes installs diverse functional groups. This genetically encoded peptide-based strategy allows for rapid diversification of these natural products by mutation in the precursor genes merged with unique combinations of modification enzymes...
October 13, 2015: BMC Genomics
S Tamilselvan, P Jambulingam, V Manoharan, R Shanmugasundaram, G Vivekanandan, A M Manonmani
BACKGROUND & OBJECTIVES: Fly ash is produced in huge quantities by the various thermal power stations in India. This thermal waste has been employed as a carrier material in the preparation of a biopesticidal water dispersible powder (WDP) formulation for use against mosquitoes. In the present investigation, this newly developed fly ash based WDP formulation was evaluated in natural breeding habitats of mosquito. METHODS: Fly ash based WDP formulation of Bacillus thuringiensis var...
September 2015: Journal of Vector Borne Diseases
Karol Gliniewicz, Mark Wildung, Lisa H Orfe, Gregory D Wiens, Kenneth D Cain, Kevin K Lahmers, Kevin R Snekvik, Douglas R Call
BACKGROUND: Flavobacterium psychrophilum is the etiologic agent of bacterial coldwater disease in salmonids. Earlier research showed that a rifampicin-passaged strain of F. psychrophilum (CSF 259-93B.17) caused no disease in rainbow trout (Oncorhynchus mykiss, Walbaum) while inducing a protective immune response against challenge with the virulent CSF 259-93 strain. We hypothesized that rifampicin passage leads to an accumulation of genomic mutations that, by chance, reduce virulence...
2015: BMC Microbiology
Hashem Etayash, Sarfuddin Azmi, Ramana Dangeti, Kamaljit Kaur
With the growing concerns in the scientific and health communities over increasing levels of antibiotic resistance, antimicrobial peptide bacteriocins have emerged as promising alternatives to conventional small molecule antibiotics. A substantial attention has recently focused on the utilization of bacteriocins in food preservation and health safety. Despite the fact that a large number of bacteriocins have been reported, only a few have been fully characterized and structurally elucidated. Since knowledge of the molecular structure is a key for understanding the mechanism of action and therapeutic effects of peptide, we centered our focus in this review on the structure-activity relationships of bacteriocins with a particular focus in seven bacteriocins, namely, nisin, microcin J25, microcin B17, microcin C, leucocin A, sakacin P, and pediocin PA-1...
2015: Current Topics in Medicinal Chemistry
George A Jacoby, Marian A Corcoran, David C Hooper
Qnr is a plasmid-encoded and chromosomally determined protein that protects DNA gyrase and topoisomerase IV from inhibition by quinolones. Despite its prevalence worldwide and existence prior to the discovery of quinolones, its native function is not known. Other synthetic compounds and natural products also target bacterial topoisomerases. A number were studied as molecular probes to gain insight into how Qnr acts. Qnr blocked inhibition by synthetic compounds with somewhat quinolone-like structure that target the GyrA subunit, such as the 2-pyridone ABT-719, the quinazoline-2,4-dione PD 0305970, and the spiropyrimidinetrione pyrazinyl-alkynyl-tetrahydroquinoline (PAT), indicating that Qnr is not strictly quinolone specific, but Qnr did not protect against GyrA-targeting simocyclinone D8 despite evidence that both simocyclinone D8 and Qnr affect DNA binding to gyrase...
November 2015: Antimicrobial Agents and Chemotherapy
Zygmunt Zdrojewicz, Anna Otlewska, Paweł Hackemer, Agnieszka Otlewska
In this publication we described amygdalin. It was isolated for the first time in the 19th century. Amygdalin is called interchangeably vitamin B17 or laetrile. Since more than a hundred years, there has been reports about its unique anticancer properties. We tried to introduce the present knowledge about therapeutic efficacy of laetrile. Most of these studies has been made in the in vitro environment. The lack of appropriate studies forced scientists to examine the positive influence of amygdalin on many diseases like: bladder cancer, prostate cancer, cervical cancer, colon cancer, promyelocytic leukemia, chronic kidney disease, psoriasis and other...
May 2015: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
Aki Mafune, Takanori Hama, Toshihito Suda, Yutaka Suzuki, Masahiro Ikegami, Chikako Sakanashi, Satoko Imai, Akio Nakashima, Takashi Yokoo, Kota Wada, Hiromi Kojima, Mitsuyoshi Urashima
BACKGROUND: Smoking induces oncogenic TP53-mutations in head and neck squamous cell carcinomas (HNSCCs). Disruptive mutations of TP53-gene and expression of p16 protein [p16 (+)] in tumor tissue associate with worse and better prognosis, respectively. UDP-glucuronosyltransferase 2 family, polypeptide B17 (UGT2B17) detoxifies smoking-related metabolites. Differences among ethnic groups in UGT2B17 are extremely high. Homozygous deletions of UGT2B17 gene (UGT2B17-deletion) are a common copy number variant (CNV) among Japanese, but not a common CNV among Africans and Europeans...
2015: BMC Cancer
Ward De Spiegelaere, Jan Philippé, Karen Vervisch, Chris Verhofstede, Eva Malatinkova, Maja Kiselinova, Wim Trypsteen, Pawel Bonczkowski, Dirk Vogelaers, Steven Callens, Jean Ruelle, Kabamba Kabeya, Stephane De Wit, Petra Van Acker, Vicky Van Sandt, Marie-Paule Emonds, Paul Coucke, Erica Sermijn, Linos Vandekerckhove
Abacavir is a nucleoside reverse transcriptase inhibitor used as part of combination antiretroviral therapy in HIV-1-infected patients. Because this drug can cause a hypersensitivity reaction that is correlated with the presence of the HLA-B*57:01 allotype, screening for the presence of HLA-B*57:01 is recommended before abacavir initiation. Different genetic assays have been developed for HLA-B*57:01 screening, each with specific sensitivity, turnaround time and assay costs. Here, a new real-time PCR (qPCR) based analysis is described and compared to sequence specific primer PCR with capillary electrophoresis (SSP PCR CE) on 149 patient-derived samples, using sequence specific oligonucleotide hybridization combined with high resolution SSP PCR as gold standard...
2015: PloS One
Chan Xiang, Jiucun Wang, Xiaochen Kou, Xiabin Chen, Zhaoyu Qin, Yan Jiang, Chang Sun, Jibin Xu, Wen Tan, Li Jin, Dongxin Lin, Fuchu He, Haijian Wang
Inhaled xenobiotics such as tobacco-specific carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone are mainly metabolized by phase I oxidase cytochrome P450, family 2, subfamily A, polypeptide 13 (CYP2A13), phase II conjugate UDP glucuronosyltransferase 2 family, polypeptide B17 (UGT2B17), and phase III transporter ATP-binding cassette, subfamily B (MDR/TAP), member 1 (ABCB1), with genetic polymorphisms implicated in lung cancer. Their genetic interaction and pulmonary expression regulation are largely unknown...
May 2015: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
Daiju Ichikawa, Masanao Asano, Susan A Shinton, Joni Brill-Dashoff, Anthony M Formica, Anna Velcich, Richard R Hardy, Kyoko Hayakawa
Expression of a germline VH3609/D/JH2 IgH in mice results in the generation of B1 B cells with anti-thymocyte/Thy-1 glycoprotein autoreactivity by coexpression of Vk21-5/Jk2 L chain leading to production of serum IgM natural autoantibody. In these same mice, the marginal zone (MZ) B cell subset in spleen shows biased usage of a set of Ig L chains different from B1 B cells, with 30% having an identical Vk19-17/Jk1 L chain rearrangement. This VH3609/Vk19-17 IgM is reactive with intestinal goblet cell granules, binding to the intact large polymatrix form of mucin 2 glycoprotein secreted by goblet cells...
January 15, 2015: Journal of Immunology: Official Journal of the American Association of Immunologists
Tae Su Choi, Jong Wha Lee, Kyeong Sik Jin, Hugh I Kim
Amyloid fibrillation in water-organic mixtures has been widely studied to understand the effect of protein-solvent interactions on the fibrillation process. In this study, we monitored insulin fibrillation in formamide and its methyl derivatives (formamide, N-methyl formamide, N,N-dimethyl formamide) in the presence and absence of water. These model solvent systems mimic the cellular environment by providing denaturing conditions and a hydrophobic environment with limited water content. Thioflavin T (ThT) assay revealed that binary mixtures of water with formamide and its methyl derivatives enhanced fibrillation rates and ?-sheet abundance, whereas organic solvents suppressed insulin fibrillation...
October 21, 2014: Biophysical Journal
Andreas Thomas, Wilhelm Schänzer, Mario Thevis
The qualitative and quantitative determination of insulin from human blood samples is an emerging topic in doping controls as well as in other related disciplines (e.g. forensics). Beside the therapeutic use, insulin represents a prohibited, performance enhancing substance in sports drug testing. In both cases accurate, sensitive, specific, and unambiguous determination of the target peptide is of the utmost importance. The challenges concerning identifying insulins in blood by liquid chromatography coupled to ion mobility mass spectrometry (LC-IM-MS) are detecting the basal concentrations of approximately 0...
November 2014: Drug Testing and Analysis
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