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Joshua Fern, Dominic Scalise, Angelo Cangialosi, Dylan Howie, Leo Potters, Rebecca Schulman
Chemical circuits can coordinate elaborate sequences of events in cells and tissues, from the self-assembly of biological complexes to the sequence of embryonic development. However, autonomously directing the timing of events in synthetic systems using chemical signals remains challenging. Here we demonstrate that a simple synthetic DNA strand-displacement circuit can release target sequences of DNA into solution at a constant rate after a tunable delay that can range from hours to days. The rates of DNA release can be tuned to the order of 1-100 nM per day...
October 17, 2016: ACS Synthetic Biology
Seyyed Mohammad Reza Kazemi-Bajestani, Maryam Tayefi, Mahmoud Ebrahimi, Ali Reza Heidari-Bakavoli, Mohsen Moohebati, Seyyed Mohammad Reza Parizade, Habib-Allah Esmaeili, Gordon Ferns, Majid Ghayour-Mobarhan
BACKGROUND: Metabolic syndrome (MetS) is defined by a clustering of cardiovascular (CV) risk factors and is associated with a heightened inflammatory state. A raised serum high-sensitivity C-reactive protein (hs-CRP), a marker of inflammation, is also known to associate with CV risk. We have investigated the relationship between the presence of MetS and serum hs-CRP concentration in a large representative Persian population cohort without a history of cardiovascular disease (CVD). METHODS: The MASHAD study population cohort comprised 9 778 subjects, who were recruited from the city of Mashhad, Iran, between 2007 and 2008...
October 13, 2016: Annals of Clinical Biochemistry
M H Jazayeri, H Amani, A A Pourfatollah, A Avan, G A Ferns, H Pazoki-Toroudi
Prostate-specific antigen (PSA) is used to screen for prostate disease, although it has several limitations in its application as an organ-specific or cancer-specific marker. Furthermore, a highly specific/sensitive and/or label-free identification of PSA still remains a challenge in the diagnosis of prostate anomalies. We aimed to develop a gold nanoparticle (GNP)-conjugated anti-PSA antibody-based localized surface plasmon resonance (LSPR) as a novel approach to detect prostatic disease. A total of 25 nm colloidal gold particles were prepared followed by conjugation with anti-PSA pAb (GNPs-PSA pAb)...
October 14, 2016: Cancer Gene Therapy
Julia Fern, Dennis Nitkowski, Ulrike Petermann, Franz Petermann
No abstract text is available yet for this article.
October 13, 2016: Zeitschrift Für Kinder- und Jugendpsychiatrie und Psychotherapie
Ying Teng, Shijiang Feng, Wenjie Ren, Lingjia Zhu, Wenting Ma, Peter Christie, Yongming Luo
A pot experiment was conducted to explore the phytoremediation of a diphenylarsinic acid (DPAA) spiked soil using Pteris vittata associated with exogenous Phyllobacterium myrsinacearum RC6b. Removal of DPAA from the soil, soil enzyme activities and the functional diversity of the soil microbial community were evaluated. DPAA concentrations in soil treated with the fern or the bacterium were 35-47% lower than that in the control and were lowest in soil treated with P. vittata and P. myrsinacearum together. The presence of the bacterium added in the soil significantly increased the plant growth and DPAA accumulation...
October 14, 2016: International Journal of Phytoremediation
Emily A Ruden, David P Way, Rollin W Nagel, Fern Cheek, Alex J Auseon
BACKGROUND: Best practices in the teaching of performance and interpretation of echocardiography to cardiology fellows are unknown, and thus, it has traditionally been performed through an apprenticeship model. This review summarizes the existing literature describing evidence-based teaching of echocardiography. METHODS: A comprehensive search of multiple scientific and educational databases included prospective studies describing an educational intervention for teaching echocardiography to physicians...
October 13, 2016: Echocardiography
Arnab Kumar De, Narottam Dey, Malay Kumar Adak
In the present experiment a pteridophytic species Azolla and an angiospermic species Vernonia were evaluated on the basis of cellular reactivity for herbicidal action through ongoing concentrations. Initially, both the species recorded a significant activity of IAA-oxidase as mark of IAA metabolism with herbicidal sensitivity. Still, Vernonia species were more affected on 2,4-D mediated auxin catabolism. The loss of auxin concentrations on the tissues by 2,4-D reaction was also reflected on growth parameters including relative growth rate and chlorophyll biosynthesis...
July 2016: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
Thelma J Mielenz, Laura L Durbin, Fern Hertzberg, Diana Nobile-Hernandez, Haomiao Jia
Falls are dangerous and costly for older adults. The A Matter of Balance/Volunteer Lay Leader (AMOB/VLL) program is an evidence-based fall risk reduction program that could help reduce this burden. This study introduced a door-through-door transportation program to improve program delivery (N = 126). Characteristics predicting completion of all eight AMOB/VLL sessions were identified using logistic regression. Individual growth models were employed to determine the immediate, intermediate, and long-term goal outcomes resulting from receiving an adequate dose of the program (five to eight sessions)...
October 7, 2016: Translational Behavioral Medicine
Frederik Clauson-Kaas, Carmel Ramwell, Hans Chr B Hansen, Bjarne W Strobel
The bracken fern (Pteridium spp.) densely populates both open and woodland vegetation types around the globe. Bracken is toxic to livestock when consumed, and a group of potent illudane-type carcinogens have been identified, of which the compound ptaquiloside (PTA) is the most abundant. The highly water soluble PTA has been shown to be leachable from bracken fronds, and present in the soil and water below bracken stands. This has raised concerns over whether the compound might pose a risk to drinking water sources...
September 26, 2016: Water Research
Kristine C Olson, Paige M Kulling, Thomas L Olson, Su-Fern Tan, Rebecca J Rainbow, David J Feith, Thomas P Loughran
Large granular lymphocyte leukemia (LGLL) is a rare incurable chronic disease typically characterized by clonal expansion of CD3+ cytotoxic T-cells. Two signal transducer and activator of transcription factors, STAT1 and STAT3, are constitutively active in T-LGLL. Disruption of this activation induces apoptosis in T-LGLL cells. Therefore, considerable efforts are focused on developing treatments that inhibit STAT activation. Calcitriol, the active form of vitamin D, has been shown to decrease STAT1 and STAT3 phosphorylation in cancer cell lines and autoimmune disease mouse models...
October 7, 2016: Cancer Biology & Therapy
Ryosuke Imai, Yoshiaki Tsuda, Sadamu Matsumoto, Atsushi Ebihara, Yasuyuki Watano
The impact of variation in mating system on genetic diversity is a well-debated topic in evolutionary biology. The diploid sexual race of Cyrtomium falcatum (Japanese holly fern) shows mating system variation, i.e., it displays two different types of sexual expression (gametangia formation) in gametophytes: mixed (M) type and separate (S) type. We examined whether there is variation in the selfing rate among populations of this species, and evaluated the relationship between mating system, genetic diversity and effective population size using microsatellites...
2016: PloS One
Ahmed M Abdel-Azeem, Sherif M Zaki, Waleed F Khalil, Noha A Makhlouf, Lamiaa M Farghaly
The aim of the present study was to investigate the anti-rheumatoid activity of secondary metabolites produced by endophytic mycobiota in Egypt. A total of 27 endophytic fungi were isolated from 10 dominant medicinal plant host species in Wadi Tala, Saint Katherine Protectorate, arid Sinai, Egypt. Of those taxa, seven isolates of Chaetomium globosum (CG1-CG7), being the most frequent taxon, were recovered from seven different host plants and screened for production of active anti-inflammatory metabolites. Isolates were cultivated on half - strength potato dextrose broth for 21 days at 28°C on a rotatory shaker at 180 rpm, and extracted in ethyl acetate and methanol, respectively...
2016: Frontiers in Microbiology
Andrew C Smith, Christopher P Kendrick, Vicky L Moss-Hayes, Christopher H Vane, Melanie J Leng
RATIONALE: The carbon isotope (δ(13) C value) composition of fossil plant material is routinely used as a proxy of past climate and environment change. However, palaeoclimate interpretation requires assumptions about the stability of δ(13) C values in plant material during its decomposition and incorporation into sediments. Previous work on modern angiosperm species show δ(13) C changes of several per mille during simulated decomposition experiments. However, no such tests have been undertaken on non-flowering plants, which are found extensively within geological record...
October 4, 2016: Rapid Communications in Mass Spectrometry: RCM
Mohsen Mazidi, Peymane Vadadian, Peyman Rezaie, Mahmoud Reza Azarpazhooh, Habib Esmaeili, Majid Ghayour-Mobarhan, Andre Pascal Kengne, Gordon A Ferns
AIM: We aimed to investigate the relationship between carotid Intima Media Thickness (CIMT) and physical activity levels (PAL), in subjects with and without metabolic syndrome (MetS) and in indidiviuals with and without carotid artery plaque (CAP) defined using high-resolution ultrasound. METHOD: A sample of 506 subjects [215 (42.5%) males], aged 35-64 years was recruited from an urban population in Mashhad, Iran, using a stratified-cluster method as part of the Mashhad Stroke Heart Atherosclerosis Disorder (MASHAD) study cohort...
August 23, 2016: Diabetes & Metabolic Syndrome
Katherine E A Semrau, Julie Herlihy, Caroline Grogan, Kebby Musokotwane, Kojo Yeboah-Antwi, Reuben Mbewe, Bowen Banda, Chipo Mpamba, Fern Hamomba, Portipher Pilingana, Andisen Zulu, Pascalina Chanda-Kapata, Godfrey Biemba, Donald M Thea, William B MacLeod, Jonathon L Simon, Davidson H Hamer
BACKGROUND: Chlorhexidine umbilical cord washes reduce neonatal mortality in south Asian populations with high neonatal mortality rates and predominantly home-based deliveries. No data exist for sub-Saharan African populations with lower neonatal mortality rates or mostly facility-based deliveries. We compared the effect of chlorhexidine with dry cord care on neonatal mortality rates in Zambia. METHODS: We undertook a cluster-randomised controlled trial in Southern Province, Zambia, with 90 health facility-based clusters...
September 29, 2016: Lancet Global Health
M Mazidi, A Heidari-Bakavoli, S S Khayyatzadeh, M R Azarpazhooh, M Nematy, M Safarian, H Esmaeili, S M R Parizadeh, M Ghayour-Mobarhan, A P Kengne, G A Ferns
The objective of this study was to investigate whether serum high-sensitivity C-reactive protein (hs-CRP) concentration varies with dietary fatty acid intake in Iranian adults free of any history of cardiovascular disease (CVD). This cross-sectional study involved 8105 adults (3142 men) aged 35-65 years. Dietary intake was assessed using 24-h dietary recalls. The relationship between anthropometric, cardiometabolic risk factors and dietary data and serum hs-CRP was assessed using SPSS software. Median crude dietary saturated fat decreased across hs-CRP quarters (P =0...
September 28, 2016: European Journal of Clinical Nutrition
Eirini Skourti-Stathaki, Frederik Clauson-Kaas, Kristian Koefoed Brandt, Lars Holm Rasmussen, Hans Christian Bruun Hansen
Bracken ferns (Pteridium spp.) are well-known for their carcinogenic properties, which are ascribed to the content of ptaquiloside and ptaquiloside-like substances. Ptaquiloside leach from the ferns and may cause contamination of drinking water. Pterosin B is formed by hydrolysis of ptaquiloside. In soil, Pterosin B is adsorbed more strongly and it is expected to have a slower turnover than ptaquiloside. We thus hypothesized that pterosin B may serve as an indicator for any past presence of ptaquiloside. Pterosin B degradation was studied in acid forest soils from bracken-covered and bracken-free areas...
December 2016: Chemosphere
Takashi Yamamoto, Yoshiaki Tsuda, Gustavo Maruyama Mori, Mariana Vargas Cruz, Yoshimi Shinmura, Alison K S Wee, Koji Takayama, Takeshi Asakawa, Takeru Yamakawa, Monica Suleiman, Juan Núñez-Farfán, Edward L Webb, Yasuyuki Watano, Tadashi Kajita
PREMISE OF THE STUDY: Twenty-seven nuclear microsatellite markers were developed for the mangrove fern, Acrostichum aureum (Pteridaceae), to investigate the genetic structure and demographic history of the only pantropical mangrove plant. METHODS AND RESULTS: Fifty-six A. aureum individuals from three populations were sampled and genotyped to characterize the 27 loci. The number of alleles and expected heterozygosity ranged from one to 15 and 0.000 to 0.893, respectively...
September 2016: Applications in Plant Sciences
Hui-Fern Koay, Nicholas A Gherardin, Anselm Enders, Liyen Loh, Laura K Mackay, Catarina F Almeida, Brendan E Russ, Claudia A Nold-Petry, Marcel F Nold, Sammy Bedoui, Zhenjun Chen, Alexandra J Corbett, Sidonia B G Eckle, Bronwyn Meehan, Yves d'Udekem, Igor E Konstantinov, Martha Lappas, Ligong Liu, Chris C Goodnow, David P Fairlie, Jamie Rossjohn, Mark M Chong, Katherine Kedzierska, Stuart P Berzins, Gabrielle T Belz, James McCluskey, Adam P Uldrich, Dale I Godfrey, Daniel G Pellicci
Mucosal-associated invariant T cells (MAIT cells) detect microbial vitamin B2 derivatives presented by the antigen-presenting molecule MR1. Here we defined three developmental stages and checkpoints for the MAIT cell lineage in humans and mice. Stage 1 and stage 2 MAIT cells predominated in thymus, while stage 3 cells progressively increased in abundance extrathymically. Transition through each checkpoint was regulated by MR1, whereas the final checkpoint that generated mature functional MAIT cells was controlled by multiple factors, including the transcription factor PLZF and microbial colonization...
September 26, 2016: Nature Immunology
Keith Pardee, Shimyn Slomovic, Peter Q Nguyen, Jeong Wook Lee, Nina Donghia, Devin Burrill, Tom Ferrante, Fern R McSorley, Yoshikazu Furuta, Andyna Vernet, Michael Lewandowski, Christopher N Boddy, Neel S Joshi, James J Collins
Synthetic biology uses living cells as molecular foundries for the biosynthesis of drugs, therapeutic proteins, and other commodities. However, the need for specialized equipment and refrigeration for production and distribution poses a challenge for the delivery of these technologies to the field and to low-resource areas. Here, we present a portable platform that provides the means for on-site, on-demand manufacturing of therapeutics and biomolecules. This flexible system is based on reaction pellets composed of freeze-dried, cell-free transcription and translation machinery, which can be easily hydrated and utilized for biosynthesis through the addition of DNA encoding the desired output...
September 22, 2016: Cell
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