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https://www.readbyqxmd.com/read/28937838/protein-supplements-pros-and-cons
#1
Jay Rabindra Kumar Samal, Indira R Samal
To provide a comprehensive analysis of the literature examining the pros and cons of protein supplementation, various articles on protein supplementation were obtained from Google Scholar, PubMed, and National Center for Biotechnology Information. Over the past few years, protein supplementation has become commonplace for gym-goers as well as for the public. A large segment of the general population relies on protein supplementation for meal replacement, weight reduction, and purported health benefits. These protein supplements have varying pros and cons associated with them, which are often overlooked by the public...
September 22, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28936979/advances-of-selectable-marker-genes-in-plastid-genetic-engineering
#2
Yong He, An Luo, Lian-Sheng Mu, Qiang Chen, Yan Zhang, Kai-Wun Yeh, Zhi-Hong Tian
Plastid genetic engineering is a safer, more precise, and more efficient transgene expression system than the nuclear genetic transformation system. It has been widely used in basic research and biotechnology applications as the next-generation transgenic technology in plants. Similar to nuclear genetic transformation, selection markers are needed in plastid genetic engineering to identify 'true' transformants and acquire homoplasmy. Because of the high copy number of plastids, maternal inheritance of the plastid genome, and the long process of homogenization of transplastomic plants, the selection markers for plastid genetic engineering are different from those used in the nuclear transformation system...
September 20, 2017: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/28936894/recent-advances-in-protein-engineering-and-biotechnological-applications-of-glutathione-transferases
#3
Fereniki Perperopoulou, Fotini Pouliou, Nikolaos E Labrou
Glutathione transferases (GSTs, EC 2.5.1.18) are a widespread family of enzymes that play a central role in the detoxification, metabolism, and transport or sequestration of endogenous or xenobiotic compounds. During the last two decades, delineation of the important structural and catalytic features of GSTs has laid the groundwork for engineering GSTs, involving both rational and random approaches, aiming to create new variants with new or altered properties. These approaches have expanded the usefulness of native GSTs, not only for understanding the fundamentals of molecular detoxification mechanisms, but also for the development medical, analytical, environmental, and agricultural applications...
September 22, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/28936673/in-vivo-reporters-for-protein-half-life
#4
Pavel Reichman, Nico Dissmeyer
Determination of the general capacity of proteolytic activity of a certain cell or tissue type can be crucial for an assessment of various features of an organism's growth and development and also for the optimization of biotechnological applications. Here, we describe the use of chimeric protein stability reporters that can be detected by standard laboratory techniques such as histological staining, selection using selective media or fluorescence microscopy. Dependent on the expression of the reporters due to the promoters applied, cell- and tissue-specific questions can be addressed...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28936470/porcine-esophageal-submucosal-gland-culture-model-shows-capacity-for-proliferation-and-differentiation
#5
Richard J von Furstenberg, Joy Li, Christina Stolarchuk, Rachel Feder, Alexa Campbell, Leandi Kruger, Liara M Gonzalez, Anthony T Blikslager, Diana M Cardona, Shannon J McCall, Susan J Henning, Katherine S Garman
BACKGROUND & AIMS: Although cells comprising esophageal submucosal glands (ESMGs) represent a potential progenitor cell niche, new models are needed to understand their capacity to proliferate and differentiate. By histologic appearance, ESMGs have been associated with both overlying normal squamous epithelium and columnar epithelium. Our aim was to assess ESMG proliferation and differentiation in a 3-dimensional culture model. METHODS: We evaluated proliferation in human ESMGs from normal and diseased tissue by proliferating cell nuclear antigen immunohistochemistry...
November 2017: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28935666/non-occupational-exposure-to-asbestos-and-risk-of-pleural-mesothelioma-review-and-meta-analysis
#6
Gary M Marsh, Alexander S Riordan, Kara A Keeton, Stacey M Benson
OBJECTIVE: To conduct an updated literature review and meta-analysis of studies of pleural malignant mesothelioma (PMM) risk among persons exposed to asbestos non-occupationally (household and neighbourhood). METHODS: We performed a literature search for articles available in the National Center for Biotechnology Information's PubMed database published between 1967 and 2016. Meta-analyses were conducted to calculate pooled PMM risk estimates, stratifying for household or neighbourhood exposure to asbestos and/or predominant asbestos fibre type (chrysotile, amphibole or mixed)...
September 21, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28935242/supplementation-of-cilostazol-during-in-vitro-maturation-enhances-the-meiosis-and-developmental-competence-of-yak-oocytes-by-influencing-camp-content-and-mrna-expression
#7
Xian-Rong Xiong, Dao-Liang Lan, Jian Li, Ya-Qiu Lin, Ming-Yang Li
The efficiency of in vitro embryo production remains low compared with that observed in vivo. Recent studies have independently shown that cyclic adenosine monophosphate (cAMP) modulation prior to in vitro maturation (IVM) supplementation improves oocyte developmental competence. In this context, special cAMP modulators have been applied during IVM as promising alternatives to improve this biotechnology. Accordingly, this study was conducted to evaluate the effects of treatment with cilostazol, a PDE3 inhibitor, during pre-IVM culture on oocyte meiotic maturation in yak...
August 24, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28934728/has-toxicity-testing-moved-into-the-21st-century-a-survey-and-analysis-of-perceptions-in-the-field-of-toxicology
#8
Virginia Zaunbrecher, Elizabeth Beryt, Daniela Parodi, Donatello Telesca, Joseph Doherty, Timothy Malloy, Patrick Allard
BACKGROUND: Ten years ago, leaders in the field of toxicology called for a transformation of the discipline and a shift from primarily relying on traditional animal testing to incorporating advances in biotechnology and predictive methodologies into alternative testing strategies (ATS). Governmental agencies and academic and industry partners initiated programs to support such a transformation, but a decade later, the outcomes of these efforts are not well understood. OBJECTIVES: We aimed to assess the use of ATS and the perceived barriers and drivers to their adoption by toxicologists and by others working in, or closely linked with, the field of toxicology...
August 30, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28934418/systems-biotechnology-for-protein-production-in-pichia-pastoris
#9
Richard J Zahrl, David A Peña, Diethard Mattanovich, Brigitte Gasser
The methylotrophic yeast Pichia pastoris (syn. Komagataella spp.) is one of the most important production systems for heterologous proteins. After the first genome sequences were published in 2009, tremendous effort was made to establish systems-level analytical methods. Methylotrophic lifestyle was one of the most thoroughly investigated topics, studied at the levels of transcriptome, proteome and metabolic flux. Also the responses of P. pastoris to environmental stress conditions experienced during high cell density production processes were studied...
November 1, 2017: FEMS Yeast Research
https://www.readbyqxmd.com/read/28934381/carboxysomes-metabolic-modules-for-co2-fixation
#10
Aiko Turmo, C Raul Gonzalez-Esquer, Cheryl A Kerfeld
The carboxysome is a bacterial microcompartment encapsulating the enzymes carbonic anhydrase and ribulose-1,5-bisphosphate carboxylase/oxygenase. As the site of CO2 fixation, it serves an essential role in the carbon dioxide concentrating mechanism of many chemoautotrophs and all cyanobacteria. Carboxysomes and other bacterial microcompartments self-assemble through specific protein-protein interactions that are typically mediated by conserved protein domains. In this review, we frame our current understanding of carboxysomes in the context of their component protein domains with their inherent function as the 'building blocks' of carboxysomes...
October 2, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28934379/autotrophic-biorefinery-dawn-of-the-gaseous-carbon-feedstock
#11
Sai Kishore Butti, S Venkata Mohan
CO2 is a resource yet to be effectively utilized in the autotrophic biotechnology, not only to mitigate and moderate the anthropogenic influence on our climate, but also to steer CO2 sequestration for sustainable development and carbon neutral status. The atmospheric CO2 concentration has seen an exponential increase with the turn of the new millennia causing numerous environmental issues and also in a way feedstock crisis. To progressively regulate the growing CO2 concentrations and to incorporate the integration strategies to our existing CO2 capturing tools, all the influencing factors need to be collectively considered...
October 2, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28934140/applications-of-pna-based-artificial-restriction-dna-cutters
#12
REVIEW
Narumi Shigi, Jun Sumaoka, Makoto Komiyama
More than ten years ago, artificial restriction DNA cutters were developed by combining two pseudo-complementary peptide nucleic acid (pcPNA) strands with either Ce(IV)/EDTA or S1 nuclease. They have remarkably high site-specificity and can cut only one predetermined site in the human genome. In this article, recent progress of these man-made tools have been reviewed. By cutting the human genome site-selectively, desired fragments can be clipped from either the termini of chromosomes (telomeres) or from the middle of genome...
September 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28932682/stroke-associated-pattern-of-gene-expression-previously-identified-by-machine-learning-is-diagnostically-robust-in-an-independent-patient-population
#13
Grant C O'Connell, Paul D Chantler, Taura L Barr
Our group recently employed genome-wide transcriptional profiling in tandem with machine-learning based analysis to identify a ten-gene pattern of differential expression in peripheral blood which may have utility for detection of stroke. The objective of this study was to assess the diagnostic capacity and temporal stability of this stroke-associated transcriptional signature in an independent patient population. Publicly available whole blood microarray data generated from 23 ischemic stroke patients at 3, 5, and 24 h post-symptom onset, as well from 23 cardiovascular disease controls, were obtained via the National Center for Biotechnology Information Gene Expression Omnibus...
December 2017: Genomics Data
https://www.readbyqxmd.com/read/28932261/determinants-of-stakeholders-attitudes-towards-biodiesel
#14
Latifah Amin, Hasrizul Hashim, Zurina Mahadi, Maznah Ibrahim, Khaidzir Ismail
BACKGROUND: Concern about the inevitable depletion of global energy resources is rising and many countries are shifting their focus to renewable energy. Biodiesel is one promising energy source that has garnered much public attention in recent years. Many believe that this alternative source of energy will be able to sustain the need for increased energy security while at the same time being friendly to the environment. Public opinion, as well as proactive measures by key players in industry, may play a decisive role in steering the direction of biodiesel development throughout the world...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28932218/alleviation-of-heavy-metal-stress-in-plants-and-remediation-of-soil-by-rhizosphere-microorganisms
#15
REVIEW
Jitendra Mishra, Rachna Singh, Naveen K Arora
Increasing concentration of heavy metals (HM) due to various anthropogenic activities is a serious problem. Plants are very much affected by HM pollution particularly in contaminated soils. Survival of plants becomes tough and its overall health under HM stress is impaired. Remediation of HM in contaminated soil is done by physical and chemical processes which are costly, time-consuming, and non-sustainable. Metal-microbe interaction is an emerging but under-utilized technology that can be exploited to reduce HM stress in plants...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28931380/leaves-play-a-central-role-in-the-adaptation-of-nitrogen-and-sulfur-metabolism-to-ammonium-nutrition-in-oilseed-rape-brassica-napus
#16
Inmaculada Coleto, Marlon de la Peña, Jon Rodríguez-Escalante, Iraide Bejarano, Gaëtan Glauser, Pedro M Aparicio-Tejo, M Begoña González-Moro, Daniel Marino
BACKGROUND: The coordination between nitrogen (N) and sulfur (S) assimilation is required to suitably provide plants with organic compounds essential for their development and growth. The N source induces the adaptation of many metabolic processes in plants; however, there is scarce information about the influence that it may exert on the functioning of S metabolism. The aim of this work was to provide an overview of N and S metabolism in oilseed rape (Brassica napus) when exposed to different N sources...
September 20, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28930528/biotechnological-improvement-of-nutritional-and-therapeutic-value-of-cultivated-potato
#17
Deepak Singh Bagri, Devanshi Chandel Upadhyay, Subodh Kumar Jain, Chandrama Prakash Upadhyay
Genetic engineering is recognized as a powerful tool for altering the genetic characteristic of crop plants. Genetic engineering has tremendous potential in developing improved potato varieties with desired agronomic traits and has been utilized for improvement of several crop plants including potato to enhance essential amino acid, protein and lipids/carbohydrates contents as well to improve stress tolerance. The pathway engineering of amino acid revealed dramatic changes in essential amino acid content and protein quality...
January 1, 2018: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/28930242/essential-oils-from-leaves-of-medicinal-plants-of-brazilian-flora-chemical-composition-and-activity-against-candida-species
#18
Maria da Conceição Mendes Ferreira da Costa, Alexandre Gomes da Silva, Ana Paula Sant'Anna da Silva, Vera Lúcia de Menezes Lima, Patrícia Cristina Bezerra-Silva, Suyana Karolyne Lino da Rocha, Daniela Maria do Amaral Ferraz Navarro, Maria Tereza Dos Santos Correia, Thiago Henrique Napoleão, Márcia Vanusa da Silva, Patrícia Maria Guedes Paiva
Background: The biotechnological potential of medicinal plants from Brazilian Caatinga and the Atlantic Forest has not been extensively studied. Thus, screening programs are important in prospecting for compounds for developing new drugs. The purpose of this study was to determine the chemical composition and to evaluate the anti-Candida activity of essential oils from leaves of Hymenaea courbaril var. courbaril, Myroxylon peruiferum, and Vismia guianensis. Methods: The oils were extracted through hydrodistillation and their chemical compositions were analyzed by gas chromatography coupled with mass spectrometry...
May 3, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28929986/the-effect-of-temperature-on-the-initial-development-of-brycon-amazonicus-spix-agassiz-1829-as-tool-for-micromanipulation-of-embryos
#19
Regiane Cristina da Silva, Matheus Pereira Dos Santos, José Augusto Senhorini, Maria do Carmo Faria Paes, Fernanda Nogueira Valentin, Takafumi Fujimoto, Nivaldo Ferreira do Nascimento, George Shigueki Yasui, Laura Satiko Okada Nakaghi
Primordial germ cell (PGC) transplant is a promising tool in aquaculture; however, successful use of this technique requires in depth knowledge of the early stages of embryo and larval development. The aim of this study was to analyse the effect of different temperatures (22, 26, and 30°C) on the early development of B. amazonicus. The newly fertilized eggs were distributed into tanks with controlled temperature and oxygenation. Samples were collected at pre-established times and analysed under light and fluorescence microscopy...
September 20, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28928864/high-immunoreactivity-of-duox2-is-associated-with-poor-response-to-preoperative-chemoradiation-therapy-and-worse-prognosis-in-rectal-cancers
#20
Shih-Chun Lin, I-Wei Chang, Pei-Ling Hsieh, Ching-Yih Lin, Ding-Ping Sun, Ming-Jen Sheu, Ching-Chieh Yang, Li-Ching Lin, Hong-Lin He, Yu-Feng Tian
Purpose: Colorectal cancer is the third most common cancer and also the fourth most common cause of cancer mortality worldwide. For rectal cancer, neoadjuvant concurrent chemoradiotherapy (CCRT) followed by radical proctectomy is gold standard treatment for patients with stage II/III rectal cancer. By data mining a documented database of rectal cancer transcriptome (GSE35452) from Gene Expression Omnibus, National Center of Biotechnology Information, we recognized that DUOX2 was the most significantly up-regulated transcript among those related to cytokine and chemokine mediated signaling pathway (GO:0019221)...
2017: Journal of Cancer
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