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https://www.readbyqxmd.com/read/28432932/surveillance-of-vittaforma-corneae-in-hot-springs-by-a-small-volume-procedure
#1
Jung-Sheng Chen, Tsui-Kang Hsu, Bing-Mu Hsu, Tung-Yi Huang, Yu-Li Huang, Men-Fang Shaio, Dar-Der Ji
Vittaforma corneae is an obligate intracellular fungus and can cause human ocular microsporidiosis. Although accumulating reports of V. corneae causing keratoconjunctivitis in both healthy and immunocompromised persons have been published, little is known about the organism's occurrence in aquatic environments. Limitations in detection sensitivity have meant a large sampling volume is required to detect the pathogen up to now, which is problematic. A recent study in Taiwan has shown that some individuals suffering from microsporidial keratitis (MK) were infected after exposure to the pathogen at a hot spring...
April 19, 2017: Water Research
https://www.readbyqxmd.com/read/28431642/pcr-based-detection-methods-for-single-nucleotide-polymorphism-or-mutation-real-time-pcr-and-its-substantial-contribution-toward-technological-refinement
#2
Kazuyuki Matsuda
Single-nucleotide polymorphisms (SNPs) and single-nucleotide mutations result from the substitution of only a single base. The SNP or mutation can be relevant to disease susceptibility, pathogenesis of disease, and efficacy of specific drugs. It is important to detect SNPs or mutations clinically. Methods to distinguish/detect SNPs or mutations should be highly specific and sensitive. In this regard, polymerase chain reaction (PCR) has provided the necessary analytical performance for many molecular analyses...
2017: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/28431571/unique-lcr-variations-among-lineages-of-hpv16-18-and-45-isolates-from-women-with-normal-cervical-cytology-in-ghana
#3
Adolf K Awua, Richard M K Adanu, Edwin K Wiredu, Edwin A Afari, Vanessa A Zubuch, Richard H Asmah, Alberto Severini
BACKGROUND: In addition to being useful for classification, sequence variations of human Papillomavirus (HPV) genotypes have been implicated in differential oncogenic potential and a differential association with the different histological forms of invasive cervical cancer. These associations have also been indicated for HPV genotype lineages and sub-lineages. In order to better understand the potential implications of lineage variation in the occurrence of cervical cancers in Ghana, we studied the lineages of the three most prevalent HPV genotypes among women with normal cytology as baseline to further studies...
April 21, 2017: Virology Journal
https://www.readbyqxmd.com/read/28431114/molecular-characterization-of-cryptococcus-neoformans-isolated-from-the-environment-in-beijing-china
#4
Hongtao Dou, Huizhu Wang, Shaowei Xie, Xinxin Chen, Zhipeng Xu, Yingchun Xu
The molecular type of environmental Cryptococcus neoformans in Beijing was not clear. Our study aims to reveal the molecular characterization of C. neoformans complex from environment in Beijing, China. A total of 435 samples of pigeon droppings from 11 different homes in Beijing were collected from August to November in 2015. Pigeon droppings were inoculated onto caffeic acid cornmeal agar (CACA) to screen C. neoformans complex. Bruker Biotyper matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) was performed for species identification...
April 20, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28430157/development-of-user-friendly-method-to-distinguish-subspecies-of-the-korean-medicinal-herb-perilla-frutescens-using-multiplex-pcr
#5
Yonguk Kim, Ah-Young Kim, Ara Jo, Hakjoon Choi, Seung-Sik Cho, Chulyung Choi
Perilla (Perilla frutescens) is an economically and culturally important plant in East Asia. Plant breeding between cultivars has enhanced the genetic diversity of perilla overall, but means that functionally diverse subspecies are more difficult to identify and distinguish. In this study, we developed gene-based DNA markers to distinguish between the Korean herbal medicinal perilla varieties. We identified informative simple sequence repeat (SSR) regions on the promoter regions of the Myb-P1 and dihydroflavonol 4-reductase (DFR) genes, as well as a large insertion-deletion (indel) region in the limonene synthase (LS) gene, and developed markers to characterize the distinct subspecies differences (PfMyb-P1pro, PfDFRpro, and PfLS, respectively)...
April 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28429584/dna-metabarcoding-of-unfractionated-water-samples-relates-phyto-zoo-and-bacterioplankton-dynamics-and-reveals-a-single-taxon-bacterial-bloom
#6
Christian Wurzbacher, Katrin Attermeyer, Marie Therese Kettner, Clara Flintrop, Norman Warthmann, Sabine Hilt, Hans-Peter Grossart, Michael T Monaghan
Most studies of aquatic plankton focus on either macroscopic or microbial communities, and on either eukaryotes or prokaryotes. This separation is primarily for methodological reasons, but can overlook potential interactions among groups. We tested whether DNA metabarcoding of unfractionated water samples with universal primers could be used to qualitatively and quantitatively study the temporal dynamics of the total plankton community in a shallow temperate lake. We found significant changes in the relative proportions of normalized sequence reads of eukaryotic and prokaryotic plankton communities over a three-month period in spring...
April 21, 2017: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/28429132/development-of-a-real-time-recombinase-polymerase-amplification-assay-for-rapid-and-sensitive-detection-of-porcine-circovirus-2
#7
Jianchang Wang, Jinfeng Wang, Libing Liu, Wanzhe Yuan
Porcine diseases associated with porcine circovirus 2 (PCV-2) infection have resulted in significant economic losses worldwide. A real-time recombinase polymerase amplification (RPA) assay was developed to detect PCV-2 using primers and an exo probe specific for the ORF2 gene. The reaction process can be completed in 20 min at 38 °C. The assay only detects PCV-2, as there was no cross-reaction with other pathogens important in pigs. Using the PCV-2 genomic DNA as template, the analytical sensitivity of the real-time RPA was 103 copies...
April 20, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28428799/a-novel-cytoplasmic-male-sterility-in-brassica-napus-inap-cms-with-carpelloid-stamens-via-protoplast-fusion-with-chinese-woad
#8
Lei Kang, Pengfei Li, Aifan Wang, Xianhong Ge, Zaiyun Li
A novel cytoplasmic male sterility (CMS) in Brassica napus (inap CMS) was selected from the somatic hybrid with Isatis indigotica (Chinese woad) by recurrent backcrossing. The male sterility was caused by the conversion of tetradynamous stamens into carpelloid structures with stigmatoid tissues at their tips and ovule-like tissues in the margins, and the two shorter stamens into filaments without anthers. The feminized development of the stamens resulted in the complete lack of pollen grains, which was stable in different years and environments...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28427957/pcr-based-identification-of-trypanosoma-lewisi-and-trypanosoma-musculi-using-maxicircle-kinetoplast-dna
#9
Xiao-Kun Hong, Xuan Zhang, Octavio Alejandro Fusco, You-Gen Lan, Zhao-Rong Lun, De-Hua Lai
Trypanosoma lewisi, transmitted by rat fleas, is a widespread pathogen specific to rats with records of human infection cases. Its closely related species with global distribution, Trypanosoma musculi, is transmitted between mice by ingestion of infected fleas. These trypanosomes are of similar morphology, making it difficult to distinguish them by microscopy. In this study, we have developed a rapid, sensitive and reliable PCR method for the diagnosis of T. lewisi and T. musculi. The T. lewisi-specific amplicons were not produced by other Trypanosoma, such as T...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28427807/targeted-next-generation-sequencing-in-patients-with-myotonia-congenita
#10
Valentina Ferradini, Marco Cassone, Sara Nuovo, Ilaria Bagni, Rosaria D'Apice, Annalisa Botta, Giuseppe Novelli, Federica Sangiuolo
INTRODUCTION: Myotonia Congenita (MC) is a nondystrophic skeletal muscle disease characterized by muscle stiffness, weakness, delayed skeletal relaxation and hypertrophic muscle. The disease can be inherited as dominant or recessive. More than 130 mutations in CLCN1 gene have been identified. MATERIALS AND METHODS: We analyzed the entire coding region and exon-intron boundaries of the CLCN1 gene in 40 MC patients. Samples already Sanger-sequenced were successively evaluated by Next Generation Sequencing (NGS), on Ion Torrent PGM...
April 17, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28427242/epidermal-growth-factor-receptor-variant-iii-in-head-and-neck-squamous-cell-carcinoma-is-not-relevant-for-targeted-therapy-and-irradiation
#11
Dominik Thomas Koch, Anja Pickhard, Lena Gebel, Anna Maria S Buchberger, Murat Bas, Carolin Mogler, Rudolf Reiter, Guido Piontek, Markus Wirth
BACKGROUND: The epidermal growth factor receptor (EGFR) is an important regulator of cell growth and survival, and is highly variable in tumor cells. The most prevalent variation of the EGFR extracellular domain is the EGFR variant III (EGFRvIII). Some studies imply that EGFRvIII may be responsible for the poor response to the monoclonal EGFR-antibody Cetuximab, used therapeutically in head and neck squamous cell carcinoma (HNSCC). Due to inconsistent data in the literature regarding EGFRvIII prevalence and clinical relevance in HNSCC, especially its predictive value, we examined EGFRvIII-transfected cell lines and patient tissue samples...
March 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28426837/the-high-prevalence-of-hpv-and-hpv16-european-variants-in-cervical-and-anal-samples-of-hiv-seropositive-women-with-normal-pap-test-results
#12
Lays Paula Bondi Volpini, Neide Aparecida Tosato Boldrini, Luciana Bueno de Freitas, Angelica Espinosa Miranda, Liliana Cruz Spano
Human Immunodeficiency Virus (HIV)-seropositive women are more likely to have anogenital cancer, and high risk-HPV (HR-HPV) infection is the main associated factor. Between August 2013 and December 2015, we conducted a descriptive study to determine the HPV genotypes and HPV16 variants in cervical and anal samples of HIV-seropositive women with a normal Pap test. The viral DNA was amplified by PCR using the PGMY09/11 set of primers. Reverse line blot (RLB), restriction fragment length polymorphism (RFLP) and sequencing assays were used to determine the HPV genotypes...
2017: PloS One
https://www.readbyqxmd.com/read/28426424/cdna-library-construction-of-two-human-demodexspecies
#13
DongLing Niu, RuiLing Wang, YaE Zhao, Rui Yang, Li Hu, YuYang Lei, WeiChao Dan
The research of Demodex, a type of pathogen causing various dermatoses in animals and human beings, is lacking at RNA level. This study aims at extracting RNA and constructing cDNA library for Demodex. First, P. cuniculiand D. farinaewere mixed to establish homogenization method for RNA extraction. Second, D. folliculorumand D. breviswere collected and preserved in Trizol, which were mixed with D. farinaerespectively to extract RNA. Finally, cDNA library was constructed and its quality was assessed. The results indicated that for D...
June 1, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28426392/design-and-validation-of-a-new-method-to-detect-and-quantify-residual-host-cell-dna-in-human-recombinant-erythropoietin-repo
#14
Shima Zamanian, Samira Mohammadi-Yeganeh, Vahid Kia, Hooman Kaghazian, Mahdi Paryan
During the purification of Human Recombinant EPO (rEPO) from host cells, residual DNA may remain in final products. This contamination is a risk factor for patients and may result in the inactivation of some tumor suppressor genes (TSG) or activation of oncogenes if its concentration is more than the standard defined by WHO. Based on WHO's criteria, acceptable level of residual DNA in biopharmaceuticals is less than 10-100 picograms/dose. In this study we have designed a sensitive and specific Quantitative Real-time PCR assay for detection of residual DNA in human rEPO products...
April 20, 2017: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/28426307/how-california-prepared-for-implementation-of-physician-assisted-death-a-primer
#15
Laura A Petrillo, Elizabeth Dzeng, Krista L Harrison, Lindsay Forbes, Benjamin Scribner, Barbara A Koenig
Physician-assisted death is now legal in California, and similar laws are being considered in many other states. The California law includes safeguards, yet health care providers will face practical and ethical issues while implementing physician-assisted death that are not addressed by the law. To help providers and health care facilities in California prepare to provide optimal care to patients who inquire about physician-assisted death, we brought together experts from California, Oregon, and Washington...
April 20, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28425835/enzymatic-synthesis-and-protein-adsorption-properties-of-crystalline-nanoribbons-composed-of-cellulose-oligomer-derivatives-with-primary-amino-groups
#16
Takatoshi Nohara, Toshiki Sawada, Hiroshi Tanaka, Takeshi Serizawa
The in vitro enzymatic synthesis of cellulose and its derivatives has attracted growing interest for fabricating novel cellulose-based supramolecular assemblies with unique physicochemical and functional properties. However, their potential biomedical applications have not been sufficiently demonstrated despite their useful features of designable structures and tailor-made surface functionalities. Herein, we demonstrated the production of crystalline nanoribbons composed of cellulose oligomer derivatives with primary amino groups via cellodextrin phosphorylase-catalyzed single-step reactions using α-D-glucose l-phosphate monomers and 2-aminoethyl-β-D-glucoside primers...
April 20, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28425429/evidence-of-horizontal-transmission-of-the-cancer-associated-steamer-retrotransposon-among-ecological-cohort-bivalve-species
#17
Ashley N Paynter, Michael J Metzger, Jocelyn A Sessa, Mark E Siddall
Bivalve specimens from legacy frozen tissue collections, and others freshly obtained, were surveyed for the presence of the Steamer long terminal repeat (LTR)-retrotransposon associated with disseminated hemic neoplasia of the soft-shelled clam Mya areneria. Of 22 species investigated using primers for the pol region, only Atlantic M. arenaria, Atlantic and North Sea razor clams Ensis directus, and Baltic clams Macoma balthica from the North Sea were found to possess copies of Steamer in their genomes. Notably, close relatives like Mya truncata and Siliqua patula did not exhibit evidence of Steamer...
April 20, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28425387/zebra-borne-neurotropic-equid-herpesvirus-1-meningoencephalitis-in-a-thomson-s-gazelle-eudorcas-thomsonii
#18
Kanako Sakaguchi, Kenneth Kim, Ingeborg Langohr, Annabel G Wise, Roger K Maes, Gordon Pirie, Tokuma Yanai, Mohie Haridy, Lorrie Gaschen, Fabio Del Piero
We describe the histopathologic, immunohistochemical, and molecular features of a case of meningoencephalitis in a Thomson's gazelle ( Eudorcas thomsonii) naturally infected with zebra-borne equid herpesvirus 1 (EHV-1) and the implications for the molecular detection of zebra-borne EHV-1. A 4-y-old female Thomson's gazelle was submitted for postmortem examination; no gross abnormalities were noted except for meningeal congestion. Microscopic evaluation demonstrated multifocal nonsuppurative meningoencephalitis with intranuclear eosinophilic and amphophilic inclusion bodies and EHV-9 antigen in neurons...
April 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28424856/homogenous-assay-for-protein-detection-based-on-proximity-dna-hybridization-and-isothermal-circular-strand-displacement-amplification-reaction
#19
Manjun Zhang, Ruimin Li, Liansheng Ling
This work proposed a homogenous fluorescence assay for proteins, based on the target-triggered proximity DNA hybridization in combination with strand displacement amplification (SDA). It benefited from target-triggered proximity DNA hybridization to specifically recognize the target and SDA making recycling signal amplification. The system included a molecular beacon (MB), an extended probe (EP), and an assistant probe (AP), which were not self-assembly in the absence of target proteins, due to the short length of the designed complementary sequence among MB, EP, and AP...
April 19, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28424844/microbial-reductive-dehalogenation-of-trihalomethanes-by-a-dehalobacter-containing-co-culture
#20
Siyan Zhao, Matthew J Rogers, Jianzhong He
Trihalomethanes such as chloroform and bromoform, although well-known as a prominent class of disinfection by-products, are ubiquitously distributed in the environment due to widespread industrial usage in the past decades. Chloroform and bromoform are particularly concerning, of high concentrations detected and with long half-lives up to several hundred days in soils and groundwater. In this study, we report a Dehalobacter- and Desulfovibrio-containing co-culture that exhibits dehalogenation of chloroform (~0...
April 19, 2017: Applied Microbiology and Biotechnology
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