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https://www.readbyqxmd.com/read/28911056/carbon-concentrating-mechanisms-in-seagrasses
#1
Anthony William D Larkum, Peter A Davey, John Kuo, Peter J Ralph, John A Raven
Seagrasses are unique angiosperms that carry out growth and reproduction submerged in seawater. They occur in at least three families of the Alismatales. All have chloroplasts mainly in the cells of the epidermis. Living in seawater, the supply of inorganic carbon (Ci) to the chloroplasts is diffusion limited, especially under unstirred conditions. Therefore, the supply of CO2 and bicarbonate across the diffusive boundary layer on the outer side of the epidermis is often a limiting factor. Here we discuss the evidence for mechanisms that enhance the uptake of Ci into the epidermal cells...
June 1, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28911055/pyrenoid-loss-in-chlamydomonas-reinhardtii-causes-limitations-in-co2-supply-but-not-thylakoid-operating-efficiency
#2
Oliver D Caspari, Moritz T Meyer, Dimitri Tolleter, Tyler M Wittkopp, Nik J Cunniffe, Tracy Lawson, Arthur R Grossman, Howard Griffiths
The pyrenoid of the unicellular green alga Chlamydomonas reinhardtii is a microcompartment situated in the centre of the cup-shaped chloroplast, containing up to 90% of cellular Rubisco. Traversed by a network of dense, knotted thylakoid tubules, the pyrenoid has been proposed to influence thylakoid biogenesis and ultrastructure. Mutants that are unable to assemble a pyrenoid matrix, due to expressing a vascular plant version of the Rubisco small subunit, exhibit severe growth and photosynthetic defects and have an ineffective carbon-concentrating mechanism (CCM)...
June 1, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28905705/mucilaginibacter-terrae-sp-nov-isolated-from-antarctic-soil
#3
Ivo Sedláček, Roman Pantůček, Stanislava Králová, Ivana Mašlaňová, Pavla Holochová, Eva Staňková, Roman Sobotka, Miloš Barták, Hans-Jürgen Busse, Pavel Švec
A bacterial strain designated CCM 8645T was isolated from a soil sample collected nearby a mummified seal carcass in the northern part of James Ross Island, Antarctica. The cells were short rods, Gram-stain-negative, non-motile, catalase and oxidase positive, and produced a red-pink pigment on R2A agar. A polyphasic taxonomic approach based on 16S rRNA gene sequencing, extensive biotyping using conventional tests and commercial identification kits and chemotaxonomic analyses were applied to clarify its taxonomic position...
September 14, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28900547/chagas-cardiomyopathy-presenting-as-symptomatic-bradycardia-an-underappreciated-emerging-public-health-problem-in-the-united-states
#4
Richard Jesse Durrance, Tofura Ullah, Zulekha Atif, William Frumkin, Kaushik Doshi
Chagas cardiomyopathy (CCM) is traditionally considered a disease restricted to areas of endemicity. However, an estimated 300,000 people living in the United States today have CCM, of which its majority is undiagnosed. We present a case of CCM acquired in an endemic area and detected in its early stage. A 42-year-old El Salvadoran woman presented with recurrent chest pain and syncopal episodes. Significant family history includes a sister in El Salvador who also began suffering similar episodes. Physical exam and ancillary studies were only remarkable for sinus bradycardia...
2017: Case Reports in Cardiology
https://www.readbyqxmd.com/read/28894389/quantification-of-small-fiber-pathology-in-patients-with-sarcoidosis-and-chronic-pain-using-cornea-confocal-microscopy-and-skin-biopsies
#5
Linda Cj Oudejans, Marieke Niesters, Michael Brines, Albert Dahan, Monique van Velzen
Small fiber pathology with concomitant chronic neuropathic pain is a common complication of sarcoidosis. The gold standard of diagnosis of small fiber neuropathy (SFN) is the quantification of small nerve fibers in skin biopsies in combination with patient history and psychophysical tests; a new technique is the quantification of small nerve fibers in the cornea using cornea confocal microscopy (CCM). Here, we studied small fiber morphology in sarcoidosis patients with neuropathic pain using skin biopsies, CCM, and quantitative sensory testing (QST)...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28892037/induction-and-micro-ct-imaging-of-cerebral-cavernous-malformations-in-mouse-model
#6
Jaesung P Choi, Xi Yang, Matthew Foley, Xian Wang, Xiangjian Zheng
Mutations in the CCM1 (aka KRIT1), CCM2, or CCM3 (aka PDCD10) gene cause cerebral cavernous malformation (CCM) in humans. Mouse models of CCM disease have been established by tamoxifen induced deletion of Ccm genes in postnatal animals. These mouse models provide invaluable tools to investigate molecular mechanism and therapeutic approaches for CCM disease. An accurate and quantitative method to assess lesion burden and progression is essential to harness the full value of these animal models. Here, we demonstrate the induction of CCM disease in a mouse model and the use of the contrast enhanced X-ray micro computed tomography (micro-CT) method to measure CCM lesion burden in mouse brains...
September 4, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28890910/six-month-outcomes-for-collaborative-care-management-of-depression-among-smoking-and-nonsmoking-patients
#7
Daniel R Witt, Gregory M Garrison, Cesar A Gonzalez, Terrence J Witt, Kurt B Angstman
BACKGROUND: Collaborative care management (CCM) is an evidence-based model that contributes to better outcomes for depression treatment in the primary care setting. Tobacco use increases overall economic costs, morbidity, and mortality and has been shown to impact behavioral health outcomes. Our study aims to observe clinical outcomes for depression treatment for patients with comorbid tobacco use and depression within the CCM model. METHODS: A retrospective chart review study of 2826 adult patients with depression enrolled in CCM was performed to determine the association between regular tobacco use and depression outcomes...
January 2017: Health Services Research and Managerial Epidemiology
https://www.readbyqxmd.com/read/28884669/acinetobacter-guangdongensis-feng-et-al-2014-is-a-junior-heterotypic-synonym-of-acinetobacter-indicus-malhotra-et-al-2012
#8
Alexandr Nemec, Lenka Radolfova-Krizova
A draft whole-genome sequence was obtained for Acinetobacter guangdongensis strain KCTC 42012T and compared against those of the type strains of all Acinetobacter species with validly published names. High similarity was found to Acinetobacter indicus CCM 7832T (average nucleotide identity based on blast and digital DNA-DNA hybridization values of 96.3 and 70.4 %, respectively). In addition, the metabolic, physiological and chemotaxonomic features of KCTC 42012T were shown to be congruent with those of A...
September 8, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28877524/selection-paradigms-for-large-vessel-occlusion-acute-ischemic-stroke-endovascular-therapy
#9
Mehdi Bouslama, Meredith T Bowen, Diogo C Haussen, Seena Dehkharghani, Jonathan A Grossberg, Letícia C Rebello, Srikant Rangaraju, Michael R Frankel, Raul G Nogueira
BACKGROUND: Optimal patient selection methods for thrombectomy in large vessel occlusion stroke (LVOS) are yet to be established. We sought to evaluate the ability of different selection paradigms to predict favorable outcomes. METHODS: Review of a prospectively collected database of endovascular patients with anterior circulation LVOS, adequate CT perfusion (CTP), National Institutes of Health Stroke Scale (NIHSS) ≥10 from September 2010 to March 2016. Patients were retrospectively assessed for thrombectomy eligibility by 4 mismatch criteria: Perfusion-Imaging Mismatch (PIM): between CTP-derived perfusion defect and ischemic core volumes; Clinical-Core Mismatch (CCM): between age-adjusted NIHSS and CTP core; Clinical-ASPECTS Mismatch (CAM-1): between age-adjusted NIHSS and ASPECTS; Clinical-ASPECTS Mismatch (CAM-2): between NIHSS and ASPECTS...
September 7, 2017: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/28872841/chiral-ramachandran-plots-i-glycine
#10
Yael Baruch-Shpigler, Huan Wang, Inbal Tuvi-Arad, David Avnir
Ramachandran plots (RPs) map the wealth of conformations of the polypeptide backbone and are widely used to characterize protein structures. A limitation of the RPs is that they are based solely on two dihedral angles for each amino acid residue, and provide therefore only a partial picture of the conformational richness of the protein. Here we extend the structural RP analysis of proteins from a 2D map to a 3D map by adding the quantitative degree of chirality - the Continuous Chirality Measure (CCM) - of the amino acid residue at each point in the RP...
September 5, 2017: Biochemistry
https://www.readbyqxmd.com/read/28870584/relevance-of-ccm-gene-polymorphisms-for-clinical-management-of-sporadic-cerebral-cavernous-malformations
#11
Carmela Rinaldi, Placido Bramanti, Concetta Scimone, Luigi Donato, Concetta Alafaci, Rosalia D'Angelo, Antonina Sidoti
Cerebral cavernous malformations (CCMs) are clusters of capillaries in the brain that may cause focal deficits or seizures in affected patients. They occur in both sporadic and inherited autosomal dominant form. Germline mutations in CCM1, CCM2 and CCM3 were identified in familial cases. Over the past 13years we performed sequencing and MLPA of the CCM genes in all sporadic and familial CCM cases coming from some hospital clinics of Neurology and Neurosurgery of Messina and other Italian cities. Our results showed that CCM sporadic patients, negative for previously reported CCM gene causative mutations, always carried known CCM polymorphisms...
September 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28863488/detection-of-coupling-delay-a-problem-not-yet-solved
#12
David Coufal, Jozef Jakubík, Nikola Jajcay, Jaroslav Hlinka, Anna Krakovská, Milan Paluš
Nonparametric detection of coupling delay in unidirectionally and bidirectionally coupled nonlinear dynamical systems is examined. Both continuous and discrete-time systems are considered. Two methods of detection are assessed-the method based on conditional mutual information-the CMI method (also known as the transfer entropy method) and the method of convergent cross mapping-the CCM method. Computer simulations show that neither method is generally reliable in the detection of coupling delays. For continuous-time chaotic systems, the CMI method appears to be more sensitive and applicable in a broader range of coupling parameters than the CCM method...
August 2017: Chaos
https://www.readbyqxmd.com/read/28857116/methodology-for-cfd-validation-for-medical-use-application-to-intracranial-aneurysm
#13
Nikhil Paliwal, Robert Damiano, Nicole Varble, Vincent Tutino, Zhongwang Dou, Adnan Siddiqui, Hui Meng
Computational fluid dynamics (CFD) is a promising tool to aid in clinical diagnoses of cardiovascular diseases. However, it uses assumptions that simplify the complexities of the real cardiovascular flow. Due to high-stakes in the clinical setting, it is critical to calculate the effect of these assumptions in the CFD simulation results. However, existing CFD validation approaches do not quantify error in the simulation results due to the CFD solver's modeling assumptions. Instead, they directly compare CFD simulation results against validation data...
August 31, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28851747/vascular-endothelial-ve-cadherin-endothelial-adherens-junctions-and-vascular-disease
#14
Maria Grazia Lampugnani, Elisabetta Dejana, Costanza Giampietro
Endothelial cell-cell adherens junctions (AJs) supervise fundamental vascular functions, such as the control of permeability and transmigration of circulating leukocytes, and the maintenance of existing vessels and formation of new ones. These processes are often dysregulated in pathologies. However, the evidence that links dysfunction of endothelial AJs to human pathologies is mostly correlative. In this review, we present an update of the molecular organization of AJ complexes in endothelial cells (ECs) that is mainly based on observations from experimental models...
August 29, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28844916/long-term-outcomes-of-surgical-treatment-in181-patients-with-supratentorial-cerebral-cavernous-malformation-associated-epilepsy
#15
Kangmin He, Shize Jiang, Zehan Wu, Liang Chen, Ying Mao
OBJECTIVE: To evaluate the efficacy of surgery as a treatment for supratentorial cerebral cavernous malformation-associated epilepsy (SCCMAE) and determine the factors that influence outcomes. METHODS: During the 5year period from2005 to 2009, this study included 181 consecutive patients who were diagnosed with SCCMAE and surgically treated in a single institute. Each patient was followed up for at least 5 years post-operatively. A time-to-event analysis was performed using Kaplan-Meier curves and Cox regression models to evaluate the associated risk factors...
August 24, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28840797/flavobacterium-gossypii-sp-nov-isolated-from-the-root-tissue-of-field-grown-cotton
#16
Peter Kämpfer, Hans-Jürgen Busse, John A McInroy, Stefanie P Glaeser
A yellow-pigmented bacterial strain, JM-222T, isolated from the root tissue of field-grown cotton (Gossypium hirsutum) in Auburn, Alabama, USA, was studied for its taxonomic allocation. Cells of the isolate were rod-shaped and Gram-stain-negative. A blast analysis using the EzTaxon database showed that strain JM-222T shared highest 16S rRNA gene sequence similarity with the type strain of Flavobacterium endophyticum (98.9 %) followed by Flavobacterium qiangtangense (96.7 %). 16S rRNA gene sequence similarities to all other Flavobacterium species were below 95 %...
August 25, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28837396/research-and-proposal-on-scr-reactor-optimization-for-industrial-boiler
#17
Yiming Yang, Jian Li, Hong He
The advanced CFD software STAR-CCM+ was used to simulate a denitrification (De-NOx) project for a boiler in this paper, and the simulation result was verified based on a physical model. Two SCR reactors were developed: reactor #1 was optimized and #2 was developed based on #1. Various indicators including gas flow field, ammonia concentration distribution, temperature distribution, gas incident angle and system pressure drop were analyzed. The analysis indicated Reactor #2 was of outstanding performance and could simplify developing greatly...
August 24, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28820096/lactobacillus-caviae-sp-nov-an-obligately-heterofermentative-bacterium-isolated-from-the-oral-cavity-of-a-guinea-pig-cavia-aperea-f-porcellus
#18
Jiri Killer, Radko Pechar, Pavel Švec, Hana Salmonová, Roman Švejstil, Martina Geigerová, Vojtěch Rada, Eva Vlková, Chahrazed Mekadim
A Gram-stain-positive, facultatively anaerobic, and catalase- and oxidase-negative bacterial strain designated MOZM2T, having 98.4 % 16S rRNA gene sequence identity with Lactobacillus reuteri DSM 20016T, was isolated from a swab of the oral cavity of a home-bred guinea pig. Comparative analyses based on the hsp60, pheS and tuf genes confirmed L. reuteri as its closest relative species, with calculated sequence similarities of 92.8, 88.8 and 96.9 %, respectively. DNA-DNA hybridisation revealed a 42 % degree of genetic similarity between the novel strain and L...
August 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28820091/alloscardovia-venturai-sp-nov-a-fructose-6-phosphate-phosphoketolase-positive-species-isolated-from-the-oral-cavity-of-a-guinea-pig-cavia-aperea-f-porcellus
#19
Hana Sechovcová, Jiri Killer, Radko Pechar, Martina Geigerová, Roman Švejstil, Hana Salmonová, Chahrazed Mekadim, Vojtěch Rada, Eva Vlková, Olga Kofroňová, Oldřich Benada
A slightly irregular, short rod-shaped bacterial strain, MOZIV/2T, showing activity of fructose 6-phosphate phosphoketolase was isolated from the oral cavity of a home-bred guinea-pig. Based on comparative 16S rRNA gene sequence analyses, its closest relatives were Alloscardovia omnicolens DSM 21503T and Alloscardovia criceti DSM 17774T with 96.0 and 95.6 % pairwise similarities, respectively. Completeness of the compared sequences was 97.3 and 96.9 %, respectively. Growth was found only under anaerobic conditions...
August 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28819935/plasma-biomarkers-of-inflammation-reflect-seizures-and-hemorrhagic-activity-of-cerebral-cavernous-malformations
#20
Romuald Girard, Hussein A Zeineddine, Maged D Fam, Anoop Mayampurath, Ying Cao, Changbin Shi, Robert Shenkar, Sean P Polster, Michael Jesselson, Ryan Duggan, Abdul-Ghani Mikati, Gregory Christoforidis, Jorge Andrade, Kevin J Whitehead, Dean Y Li, Issam A Awad
The clinical course of cerebral cavernous malformations (CCMs) is highly variable. Based on recent discoveries implicating angiogenic and inflammatory mechanisms, we hypothesized that serum biomarkers might reflect chronic or acute disease activity. This single-site prospective observational cohort study included 85 CCM patients, in whom 24 a priori chosen plasma biomarkers were quantified and analyzed in relation to established clinical and imaging parameters of disease categorization and severity. We subsequently validated the positive correlations in longitudinal follow-up of 49 subjects...
August 17, 2017: Translational Stroke Research
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