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Biochemistry AND review

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https://www.readbyqxmd.com/read/28637442/membranous-nephropathy-a-retrospective-observational-study-of-membranous-nephropathy-in-north-east-and-central-london
#1
Sanjana Gupta, John Connolly, Ruth J Pepper, Stephen B Walsh, Magdi M Yaqoob, Robert Kleta, Neil Ashman
BACKGROUND: Membranous nephropathy (MN) is the leading cause of nephrotic syndrome in adults. MN is a clinically heterogeneous disease and it is difficult to accurately predict outcomes (including end stage renal failure) at presentation and whom to treat with potentially toxic therapies. We aimed to identify factors predicting outcome in MN in our cohort from two large tertiary London units by undertaking a retrospective data analysis of 148 biopsy-proven MN patients from North East and Central London between 1995 and 2015...
June 21, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28636874/next-generation-matrix-metalloproteinase-inhibitors-novel-strategies-bring-new-prospects
#2
REVIEW
Maxim Levin, Yael Udi, Inna Solomonov, Irit Sagi
Enzymatic proteolysis of cell surface proteins and extracellular matrix (ECM) is critical for tissue homeostasis and cell signaling. These proteolytic activities are mediated predominantly by a family of proteases termed matrix metalloproteinases (MMPs). The growing evidence in recent years that ECM and non-ECM bioactive molecules (e.g., growth factors, cytokines, chemokines, on top of matrikines and matricryptins) have versatile functions redefines our view on the roles matrix remodeling enzymes play in many physiological and pathological processes, and underscores the notion that ECM proteolytic reaction mechanisms represent master switches in the regulation of critical biological processes and govern cell behavior...
June 18, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28635300/pyridine-dinucleotides-from-molecules-to-man
#3
Joshua P Fessel, William M Oldham
SIGNIFICANCE: Pyridine dinucleotides, NAD and NADP, were discovered over 100 years ago as necessary cofactors for fermentation in yeast extracts. Since that time, these molecules have been recognized as fundamental players in a variety of cellular processes, including energy metabolism, redox homeostasis, cellular signaling, and gene transcription, among many others. Given their critical role as mediators of cellular responses to metabolic perturbations, it is unsurprising that dysregulation of NAD and NADP metabolism has been associated with the pathobiology of many chronic human diseases...
June 21, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28634639/the-curious-case-of-achromobacter-eurydice-a-gram-variable-pleomorphic-bacterium-associated-with-european-foulbrood-disease-in-honeybees
#4
REVIEW
Silvio Erler, Oleg Lewkowski, Anja Poehlein, Eva Forsgren
Honeybees are prone to parasite and pathogen infestations/infections due to their social colony life. Bacterial pathogens in particular lead to destructive infections of the brood. European foulbrood is caused by the bacterium Melissococcus plutonius in combination with several other Gram-positive bacteria (Achromobacter eurydice, Bacillus pumilus, Brevibacillus laterosporus, Enterococcus faecalis, Paenibacillus alvei, Paenibacillus dendritiformis) involved as secondary invaders following the initial infection...
June 21, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28630007/rna-localization-making-its-way-to-the-center-stage
#5
REVIEW
Ashley Chin, Eric Lécuyer
Cells are highly organized entities that rely on intricate addressing mechanisms to sort their constituent molecules to precise subcellular locations. These processes are crucial for cells to maintain their proper organization and carry out specialized functions in the body, while genetic perturbations that clog up these addressing systems can contribute to disease aetiology. The trafficking of RNA molecules represents an important layer in the control of cellular organization, a process that is both highly prevalent and for which features of the regulatory machineries have been deeply conserved evolutionarily...
June 16, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28623662/advances-in-the-analysis-of-water-and-wastewater-samples-using-various-sensing-protocols-and-microfluidic-devices-based-on-pad-and-%C3%AE-tas-systems
#6
Krzysztof Piaskowski, Renata Świderska-Dąbrowska, Aleksandra Kaleniecka, Paweł K Zarzycki
The main goal of this review is to summarize practical approaches concerning the application of microfluidic systems for the analysis of various biomarkers and pollutants, as well as microbes, in water and wastewater matrixes. This problem involves multidisciplinary expertise combining research knowledge from various areas, including wet chemistry, biochemistry, physical chemistry, molecular biology, genetics, signal processing, microelectronics material science, and separation science. It has been documented that fairly primitive but fast and inexpensive screening methods involving paper-based analytical devices (PADs) and micro total analytical systems (μTAS) can be considered as serious alternatives to their more advanced counterparts such as GC, HPLC, and capillary electrophoresis coupled to various sophisticated detectors (e...
June 16, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28621886/review-of-emerging-metabolomic-tools-and-resources-2015-2016
#7
REVIEW
Biswapriya Biswavas Misra, Johannes F Fahrmann, Dmitry Grapov
Data processing and analysis are major bottlenecks in high-throughput metabolomic experiments. Recent advancements in data acquisition platforms are driving trends toward increasing data size (e.g. petabyte scale) and complexity (multiple omic platforms). Improvements in data analysis software and in silico methods are similarly required to effectively utilize these advancements and link the acquired data with biological interpretations. Herein we provide an overview of recently developed and freely-available metabolomic tools, algorithms, databases and data analysis frameworks...
June 16, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28620453/parallel-pathways-in-the-biosynthesis-of-aminoglycoside-antibiotics
#8
REVIEW
Yi Yu, Qi Zhang, Zixin Deng
Despite their inherent toxicity and the global spread of bacterial resistance, aminoglycosides (AGs), an old class of microbial drugs, remain a valuable component of the antibiotic arsenal. Recent studies have continued to reveal the fascinating biochemistry of AG biosynthesis and the rich potential in their pathway engineering. In particular, parallel pathways have been shown to be common and widespread in AG biosynthesis, highlighting nature's ingenuity in accessing diverse natural products from a limited set of genes...
2017: F1000Research
https://www.readbyqxmd.com/read/28620095/responses-to-cytokines-and-interferons-that-depend-upon-jaks-and-stats
#9
George R Stark, HyeonJoo Cheon, Yuxin Wang
Many cytokines and all interferons activate members of a small family of kinases (the Janus kinases [JAKs]) and a slightly larger family of transcription factors (the signal transducers and activators of transcription [STATs]), which are essential components of pathways that induce the expression of specific sets of genes in susceptible cells. JAK-STAT pathways are required for many innate and acquired immune responses, and the activities of these pathways must be finely regulated to avoid major immune dysfunctions...
June 15, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28619619/flavin-catalyzed-redox-tailoring-reactions-in-natural-product-biosynthesis
#10
REVIEW
Robin Teufel
Natural products are distinct and often highly complex organic molecules that constitute not only an important drug source, but have also pushed the field of organic chemistry by providing intricate targets for total synthesis. How the astonishing structural diversity of natural products is enzymatically generated in biosynthetic pathways remains a challenging research area, which requires detailed and sophisticated approaches to elucidate the underlying catalytic mechanisms. Commonly, the diversification of precursor molecules into distinct natural products relies on the action of pathway-specific tailoring enzymes that catalyze, e...
June 12, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28608956/systematic-review-of-mortality-risk-prediction-models-in-the-era-of-endovascular-abdominal-aortic-aneurysm-surgery
#11
REVIEW
N Lijftogt, T W F Luijnenburg, A C Vahl, E D Wilschut, V J Leijdekkers, M F Fiocco, M W J M Wouters, J F Hamming
BACKGROUND: The introduction of endovascular aneurysm repair (EVAR) has reduced perioperative mortality after abdominal aortic aneurysm (AAA) surgery. The objective of this systematic review was to assess existing mortality risk prediction models, and identify which are most useful for patients undergoing AAA repair by either EVAR or open surgical repair. METHODS: A systematic search of the literature was conducted for perioperative mortality risk prediction models for patients with AAA published since 2006...
July 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/28605194/discovery-of-two-bacterial-nitric-oxide-responsive-proteins-and-their-roles-in-bacterial-biofilm-regulation
#12
Sajjad Hossain, Lisa-Marie Nisbett, Elizabeth M Boon
Bacterial biofilms form when bacteria adhere to a surface and produce an exopolysaccharide matrix ( Costerton Science 1999 , 284 , 1318 ; Davies Science 1998 , 280 , 295 ; Flemming Nat. Rev. Microbiol. 2010 , 8 , 623 ). Because biofilms are resistant to antibiotics, they are problematic in many aspects of human health and welfare, causing, for instance, persistent fouling of medical implants such as catheters and artificial joints ( Brunetto Chimia 2008 , 62 , 249 ). They are responsible for chronic infections in the lungs of cystic fibrosis patients and in open wounds, such as those associated with burns and diabetes...
June 12, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28601063/molecular-mechanisms-of-ovarian-carcinoma-metastasis-key-genes-and-regulatory-micrornas
#13
REVIEW
E A Braga, M V Fridman, N E Kushlinskii
Metastasis of primary tumors progresses stepwise - from change in biochemistry, morphology, and migratory patterns of tumor cells to the emergence of receptors on their surface that facilitate directional migration to target organs followed by the formation of a specific microenvironment in a target organ that helps attachment and survival of metastatic cells. A set of specific genes and signaling pathways mediate this process under control of microRNA. The molecular mechanisms underlying biological processes associated with tumor metastasis are reviewed in this publication using ovarian cancer, which exhibits high metastatic potential, as an example...
May 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28599693/clinical-characteristics-and-outcome-of-budd-chiari-syndrome-at-a-tertiary-care-hospital-in-pakistan
#14
Om Parkash, Aysha Khan, Saeed Hamid
OBJECTIVE: To determine the clinical characteristics of Budd-Chiari syndrome (BCS), its causes and outcome at a tertiary care hospital. STUDY DESIGN: An observational study. PLACE AND DURATION OF STUDY: The Aga Khan University Hospital,Karachi, from 2004 to 2014. METHODOLOGY: Aretrospective analysis of data was conducted. Apredesigned questionnaire was filled from medical records of patients with BCS. Clinical features, etiology, management and outcome was noted from 2004 to 2014...
May 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28599373/the-99th-percentile-of-reference-population-for-ctni-and-ctnt-assay-methodology-pathophysiology-and-clinical-implications
#15
REVIEW
Aldo Clerico, Martina Zaninotto, Andrea Ripoli, Silvia Masotti, Concetta Prontera, Claudio Passino, Mario Plebani
According to recent international guidelines, including the 2012 Third Universal Definiton of Myocardial Infarction by the Joint ESC/ACCF/AHA/WHF Task Force, an increase in cardiac troponin (cTn) levels over the 99th percentile upper reference limit (99th URL) should be considered clinically relevant, this cut-off being measured with an imprecision ≤10 CV%. In theory 99th URL values strongly depend not only on demographic and physiological variables (i.e. criteria for considering the reference population "healthy"), but also on the analytical performance of cTn methods and mathematical algorithms used for the calculation...
April 12, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28593736/usefulness-of-the-%C3%AF-aromaticity-and-%C3%AF-antiaromaticity-concepts-for-clusters-and-solid-state-compounds
#16
Alexander I Boldyrev, Ivan A Popov, Alyona A Starikova, Dmitry V Steglenko
In this review we present examples of clusters, molecules, and solid-state compounds, for which the use of σ-aromaticity and σ-antiaromaticity concepts is essential for understanding of chemical bonding. We show that the bonding patterns in these σ-aromatic and σ-antiaromatic compounds are similar to those of the corresponding π-aromatic and π-antiaromatic chemical systems, respectively. Undoubtedly, σ-aromaticity helps us understand why the high symmetry isomers are the most stable among myriads of other potential structures...
June 7, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28578161/examining-the-intersection-between-splicing-nuclear-export-and-small-rna-pathways
#17
Amena Nabih, Julia A Sobotka, Monica Z Wu, Christopher J Wedeles, Julie M Claycomb
BACKGROUND: Nuclear Argonaute/small RNA pathways in a variety of eukaryotic species are generally known to regulate gene expression via chromatin modulation and transcription attenuation in a process known as transcriptional gene silencing (TGS). However, recent data, including genetic screens, phylogenetic profiling, and molecular mechanistic studies, also point to a novel and emerging intersection between the splicing and nuclear export machinery with nuclear Argonaute/small RNA pathways in many organisms...
May 31, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28573266/the-workings-of-ferritin-a-crossroad-of-opinions
#18
Wilfred R Hagen, Peter-Leon Hagedoorn, Kourosh Honarmand Ebrahimi
Biochemistry of the essential element iron is complicated by radical chemistry associated with Fe(ii) ions and by the extremely low solubility of the Fe(iii) ion in near-neutral water. To mitigate these problems cells from all domains of life synthesize the protein ferritin to take up and oxidize Fe(ii) and to form a soluble storage of Fe(iii) from which iron can be made available for physiology. A long history of studies on ferritin has not yet resulted in a generally accepted mechanism of action of this enzyme...
June 21, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28553556/the-role-of-toll-like-receptors-in-autoimmune-diseases-through-failure-of-the-self-recognition-mechanism
#19
REVIEW
Mark Farrugia, Byron Baron
Toll-like receptors (TLRs), part of the innate immune system that recognises molecular signatures, are important in the recognition of pathogenic components. However, when specific cellular contexts develop in which TLRs are inappropriately activated by self-components, this may lead to sterile inflammation and result in the occurrence of autoimmunity. This review analyses the available data regarding TLR biochemistry, the specific mechanisms which are brought about by TLR activation, and the importance of these mechanisms in the light of any existing and potential therapies in the field of autoimmunity...
2017: International Journal of Inflammation
https://www.readbyqxmd.com/read/28551870/linking-neuroethology-to-the-chemical-biology-of-natural-products-interactions-between-cone-snails-and-their-fish-prey-a-case-study
#20
REVIEW
Baldomero M Olivera, Shrinivasan Raghuraman, Eric W Schmidt, Helena Safavi-Hemami
From a biological perspective, a natural product can be defined as a compound evolved by an organism for chemical interactions with another organism including prey, predator, competitor, pathogen, symbiont or host. Natural products hold tremendous potential as drug leads and have been extensively studied by chemists and biochemists in the pharmaceutical industry. However, the biological purpose for which a natural product evolved is rarely addressed. By focusing on a well-studied group of natural products-venom components from predatory marine cone snails-this review provides a rationale for why a better understanding of the evolution, biology and biochemistry of natural products will facilitate both neuroscience and the potential for drug leads...
May 27, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
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