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https://www.readbyqxmd.com/read/29783249/prognosis-of-ischaemic-heart-disease-in-patients-with-newly-diagnosed-dm-type-2-by-logistic-regression
#1
Alina Urbanovych, Halyna Suslyk
OBJECTIVE: Introduction: Diabetes Mellitus (DM) type 2 is an important medical and social problem all around the world. One of the most serious and widespread complications of DM type 2 is a damage to the cardiovascular system. The aim was to study the way of how to predict the IHD development in patients with the newly diagnosed DM type 2 by building a mathematical model with the help of statistical method, in particular, a logistic regression, which allows predicting the occurrence of IHD by the levels of proven biochemical and anthropometric indices...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29783033/coordination-of-symbiosis-and-cell-cycle-functions-in-sinorhizobium-meliloti
#2
REVIEW
Shuanghong Xue, Emanuele G Biondi
The symbiotic nitrogen fixing species Sinorhizobium meliloti represents a remarkable model system for the class Alphaproteobacteria, which includes genera such as Caulobacter, Agrobacterium and Brucella. It is capable of living free in the soil, and is also able to establish a complex symbiosis with leguminous plants, during which its cell cycle program is completely rewired presumably due, at least in part, to the action of peptides secreted by the plant. Here we will discuss how the cell cycle regulation works in S...
May 18, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29782980/glu-residues-of-%C3%AE-delseed-motif-are-essential-for-peptide-binding-in-escherichia-coli-atp-synthase
#3
Sofiya Azim, Zulfiqar Ahmad
The current study establishes the necessity of Glu-381, Glu-384, and Glu-385 in the βDELSEED-motif of Escherichia coli ATP synthase for peptide binding and inhibition. Inhibitory profiles of wild type and mutant E. coli membrane bound F1 Fo ATP synthase were studied in the presence and absence of C-terminal NH2 bound melittin. Melittin-NH2 caused almost complete inhibition of wild type ATPase, while partial inhibition was observed for mutants where Glu was replaced with Ala, Arg, or Gln. Additionally, melittin-NH2 caused insignificant inhibition of a triple mutant where all three Glu residues were replaced with Ala residues, changing βDELSEED-motif to βDALSAAD-motif...
May 18, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29782892/a-glp-1-cck-fusion-peptide-harnesses-the-synergistic-effects-on-metabolism-of-cck-1-and-glp-1-receptor-agonism-in-mice
#4
David C Hornigold, Emma Roth, Victor Howard, Sarah Will, Stephanie Oldham, Matthew P Coghlan, Clemence Blouet, James L Trevaskis
Combination approaches for the treatment of metabolic diseases such as obesity and diabetes are becoming increasingly relevant. Co-administration of a glucagon-like peptide-1 receptor (GLP-1R) agonist with a cholecystokinin receptor-1 (CCKR1) agonist exert synergistic effects on weight loss in obese rodents. Here, we report on the effects of a novel fusion peptide (C2816) comprised of a stabilized GLP-1R agonist, AC3174, and a CCKR1-selective agonist, AC170222. C2816 was constructed such that AC3174 was linked to the N-terminus of AC170222, thus preserving the C-terminal amide of the CCK moiety...
May 18, 2018: Appetite
https://www.readbyqxmd.com/read/29782841/alternative-splicing-of-gnrh2-and-gnrh2-associated-peptide-plays-roles-in-gonadal-differentiation-of-the-rice-field-eel-monopterus-albus
#5
Ke Feng, Hongrui Luo, Mingxi Hou, Yongming Li, Ji Chen, Zuoyan Zhu, Wei Hu
The rice field eel, Monopterus albus, is a protogynous hermaphrodite fish, in which the gonads are initially female ovaries which then transform into male testes. The exact mechanisms governing sex reversal in the rice field eel are unknown. In this study, a novel alternative splicing variant of GnRH2 (GnRH2-SV), retaining the second intron, was discovered in the gonad of the rice field eel. Compared to GnRH2, GnRH2-SV may give rise to a novel truncated GnRH2-associated peptide (New GAP2). The normal transcript of GnRH2 was primarily expressed in the brain, and could also be detected in the liver, spleen, ovary, and testis...
May 18, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29782819/analytical-performance-of-an-immunoassay-to-measure-proenkephalin
#6
Leslie J Donato, Jeffrey W Meeusen, John C Lieske, Deborah Bergmann, Andrea Sparwaßer, Allan S Jaffe
BACKGROUND: Endogenous opioids, enkephalins, are known to increase with acute kidney injury. Since the mature pentapeptides are unstable, we evaluated the performance of an assay that measures proenkephalin 119-159 (PENK), a stable peptide formed concomitantly with mature enkephalins. METHODS: PENK assay performance was evaluated on two microtiterplate/chemiluminescence sandwich immunoassay formats that required 18 or 1 h incubation times. PENK concentration was measured in plasma from healthy individuals to establish a reference interval and in patients with varied levels of kidney function and comorbidities to assess the association with measured glomerular filtration rate (mGFR) using iothalamate clearance...
May 18, 2018: Clinical Biochemistry
https://www.readbyqxmd.com/read/29782794/peptides-peptidomimetics-and-carbohydrate-peptide-conjugates-as-amyloidogenic-aggregation-inhibitors-for-alzheimer-s-disease
#7
Philip Ryan, Bhautikkumar Patel, Vivek Makwana, Hemant Jadhav, Milton John Kiefel, Andrew Davey, Tristan Reekie, Santosh Rudrawar, Michael Kassiou
Alzheimer's disease (AD) is a progressive neurodegenerative disorder accounting for 60-80% of dementia cases. For many years, AD causality was attributed to amyloid-β (Aβ) aggregated species. Recently, multiple therapies that target Aβ aggregation have failed in clinical trials, since Aβ aggregation is found in AD and healthy patients. Attention has therefore shifted towards the aggregation of the peptide tau as a major driver of AD. Numerous inhibitors of tau-based pathology have recently been developed...
May 21, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29782793/zinc-ii-histidine-induced-collagen-peptide-assemblies-morphology-modulation-and-hydrolytic-catalysis-evaluation
#8
Yi-Han Ting, Hsuan-Ju Chen, Wan-Jung Cheng, Jia-Cherng Horng
Collagen-related materials have many potential biomedical applications because of their high biocompatibility and biodegradability. Designed collagen-mimetic peptides (CMPs) could self-assemble into supramolecular structures via a variety of interactions. In particular, metal-ligand interactions can induce microscale sizes of collagen assemblies. Our previous study also successfully applied metal-histidine coordination method to promote the self-assembly of CMPs into micrometers of constructs. In an effort to broaden the metal-induced strategies on assembling designed CMPs and explore the new insights into their assembly process, herein we designed and synthesized a series of short CMPs with one or more histidine residues incorporated into the peptides and used Zn(II) to induce the formation of collagen assembled microstructures...
May 21, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29782701/tgf-%C3%AE-1-modified-hyaluronic-acid-poly-glycidol-hydrogels-for-chondrogenic-differentiation-of-human-mesenchymal-stromal-cells
#9
Thomas Böck, Verena Schill, Martin Krähnke, Andre F Steinert, Jörg Tessmar, Torsten Blunk, Jürgen Groll
In cartilage regeneration, the biomimetic functionalization of hydrogels with growth factors is a promising approach to improve the in vivo performance and furthermore the clinical potential of these materials. In order to achieve this without compromising network properties, multifunctional linear poly(glycidol) acrylate (PG-Acr) is synthesized and utilized as crosslinker for hydrogel formation with thiol-functionalized hyaluronic acid via Michael-type addition. As proof-of-principle for a bioactivation, transforming growth factor-beta 1 (TGF-β1) is covalently bound to PG-Acr via Traut's reagent which does not compromise the hydrogel gelation and swelling behavior...
May 21, 2018: Macromolecular Bioscience
https://www.readbyqxmd.com/read/29782699/endoplasmic-reticulum-targeted-fluorescent-nanodot-with-large-stokes-shift-for-vesicular-transport-monitoring-and-long-term-bioimaging
#10
Leilei Shi, Xihui Gao, Wangzhang Yuan, Li Xu, Hongping Deng, Chenwei Wu, Jiapei Yang, Xin Jin, Chuan Zhang, Xinyuan Zhu
Herein, a highly stable aggregation-induced emission (AIE) fluorescent nanodot assembled by an amphiphilic quinoxalinone derivative-peptide conjugate, namely Quino-1-Fmoc-RACR (also termed as Q1-PEP), which exhibits large Stokes shift and an endoplasmic reticulum (ER)-targeting capacity for bioimaging is reported. It is found that the resulting nanodot can effectively enter the ER with high fluorescent emission. As the ER is mainly involved in the transport of synthesized proteins in vesicles to the Golgi or lysosomes, the Q1-PEP nanodot with ER-targeting capacity can be used to monitor vesicular transport inside the cells...
May 21, 2018: Small
https://www.readbyqxmd.com/read/29782429/early-results-of-laparoscopic-sleeve-gastrectomy-with-loop-bipartition
#11
Ergin Arslan, Mesut Sipahi, Oktay Banli
PURPOSE: We evaluated early results of this new procedure of transit loop bipartition with sleeve gastrectomy (TLB-SG), making a comparison with transit bipartition with sleeve gastrectomy. MATERIALS AND METHODS: Between January 2017 and September 2017, 22 patients have undergone transit bipartition with sleeve gastrectomy or TLB-SG surgery in our clinic. Patients' body mass index, excess body mass index loss, and HOMA-IR were calculated before and after the surgical operation...
May 18, 2018: Surgical Laparoscopy, Endoscopy & Percutaneous Techniques
https://www.readbyqxmd.com/read/29782286/-ngal-as-a-marker-for-some-extrarenal-complications-in-acute-coronary-syndrome
#12
M A Shalenkova, Z D Mikhailova, P F Klimkin
AIM: To study the role of neutrophil gelatinase-associated lipocalin (NGAL) as a marker for extrarenal complications in patients with acute coronary syndrome (ACS). MATERIALS AND METHODS: For 110 patients with ACS on days 1-3 of hospitalization, concentrations of NGAL, serum (s-NGAL) and urinary (u-NGAL) NGAL, and N-terminal fragment of pro-B natriuretic peptide (NT-proBNP) were measured, and transthoracic echocardiography was performed. Incidence of cardiovascular complications was determined during the stay in the hospital; hemodynamic parameters (systolic and diastolic blood pressure, heart rate) were measured on admission...
2018: Kardiologiia
https://www.readbyqxmd.com/read/29782283/-heart-failure-with-preserved-left-ventricular-ejection-fraction-epidemiology-patient-%C3%A2-portrait%C3%A2-clinic-and-diagnostics
#13
S V Gavryushina, F T Ageev
The article focuses on current aspects of epidemiology, clinical picture, and diagnostics of patients with chronic heart failure (CHF) associated with preserved left ventricular (LV) systolic function. Heart failure with preserved LV ejection fraction (HFpEF) is shown to be prevalent in a population that accounts for more than a half of all CHF cases. The group at risk for HFpEF consists primarily of older women with arterial hypertension, type 2 diabetes mellitus, obesity, and atrial fibrillation. The article presents algorithms for diagnosis of HFpEF based on classic and tissue Doppler echocardiography and measurement of natriuretic peptides...
2018: Kardiologiia
https://www.readbyqxmd.com/read/29782281/-effect-of-chronic-kidney-disease-on-the-formation-of-diastolic-heart-dysfunction-in-heart-failure-patients-with-preserved-ejection-fraction
#14
O B Kuzmin, V V Zezha, V V Belyanin, N V Buchneva
Chronic kidney disease is observed in most patients with CHF with preserved ejection fraction (HFpEF) and presents a major risk factor facilitating development and progression of LV diastolic dysfunction. The review focused on the effect of chronic kidney disease on intracellular signaling pathways affecting stiffness and diastolic relaxation of cardiomyocytes in response to inflammation and endothelial dysfunction of coronary capillaries, excessive sympathetic activation, and dysregulation of natriuretic peptides, which directly participate in the development of CHF...
2018: Kardiologiia
https://www.readbyqxmd.com/read/29782277/-association-of-polymorphism-4a-4b-and-4b-4b-in-endothelial-nitric-oxide-synthase-gene-and-markers-of-endothelial-dysfunction-in-patients-with-chronic-heart-failure
#15
E A Polunina, L P Voronina, I V Sevostyanova, O S Polunina, D S Tarasochkina
AIM: To examine the association of polymorphism 4a/4b and 4b/4b in endothelial nitric oxide synthase gene (eNOS) with levels of natriuretic peptide type-C, endothelin-1 and vasoregulative endothelial function in patients with chronic heart failure (CHF) depending on the ejection fraction of the left ventricle. MATERIALS AND METHODS: The study has included 280 patients with CHF of ischemic etiology and 60 somatically healthy individuals. A comprehensive assessment of the markers of the vascular endothelium function was carried out for all patients (endothelial function coefficient, natriuretic peptide type-C, endothelin-1) in association of polymorphism 4a/4b and 4b/4b gene of eNOS...
2018: Kardiologiia
https://www.readbyqxmd.com/read/29782199/bacteriolysis-a-mere-laboratory-curiosity
#16
Isaac Ginsburg, Erez Koren
The role of bacteriolysis in the pathophysiology of microbial infections dates back to 1893 when Buchner and Pfeiffer reported for the first time the lysis of bacteria by immune serum and related this phenomenon to the immune response. Later on, basic anti-microbial peptides and certain beta-lactam antibiotics have been shown not only to kill microorganisms but also to induce bacteriolysis and the release of cell-wall components. In 2009, a novel paradigm was offered suggesting that the main cause of death in sepsis is due to the exclusive release from activated human phagocytic neutrophils (PMNs) traps adhering upon endothelial cells of highly toxic nuclear histone...
May 21, 2018: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/29782177/synthesis-of-%C3%AE-%C3%AE-difluorinated-phosphonate-pser-pthr-mimetics-via-rhodium-catalyzed-asymmetric-hydrogenation-of-%C3%AE-difluorophosphonomethyl-%C3%AE-acylamino-acrylates
#17
Hong-Xue Chen, Jie Kang, Rong Chang, Yun-Lai Zhang, Hua-Zhen Duan, Yan-Mei Li, Yong-Xiang Chen
A novel and facile synthetic strategy for α,α-difluorinated phosphonate mimetics of phosphoserine/phosphothreonine utilizing rhodium-catalyzed asymmetric hydrogenation was developed. The dehydrogenated substrate β-difluorophosphonomethyl α-(acylamino)acrylates were first prepared from protected serine/threonine followed by asymmetric hydrogenation using the rhodium-DuPhos catalytic system to generate the chiral center(s). These important phosphonate building blocks were successfully incorporated into phosphatase-resistant peptides, which displayed similar inhibition to the 14-3-3 ζ protein as the parent pSer/pThr peptides...
May 21, 2018: Organic Letters
https://www.readbyqxmd.com/read/29782163/stoichio-kinetic-modeling-of-fenton-chemistry-in-a-meat-mimetic-aqueous-phase-medium
#18
Khaled Oueslati, Aurelie Promeyrat, Philippe Gatellier, Jean-Dominique Daudin, Alain Kondjoyan
Fenton reaction kinetics, which involved an Fe(II)/Fe(III) oxidative redox cycle, were studied in a liquid medium that mimics meat physicochemical conditions. Muscle antioxidants (enzymes, peptides and vitamins) were added one by one in the medium to determine their respective effects on formation of superoxide and hydroxyl radicals. A stoichio-kinetic mathematical model was used to predict the formation of these radicals. The difference between experimental and predicted results was mainly due to iron reactivity, which had to be taken into account in the model, and to uncertainties on some of the rate constant values introduced in the model...
May 21, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29782143/anti-tumor-humoral-and-t-cell-responses-by-mucin-1-conjugates-of-bacteriophage-qb-in-wildtype-mice
#19
Zhaojun Yin, Xuanjun Wu, Katarzyna Kaczanowska, Suttipun Sungsuwan, Marta Comellas-Aragones, Christian Pett, Jin Yu, Claire Baniel, Ulrika Westerlind, M G Finn, Xuefei Huang
Mucin-1 (MUC1) is one of the top ranked tumor associated antigens. In order to generate effective anti-MUC1 immune responses as potential anti-cancer vaccines, MUC1 peptides and glycopeptides have been covalently conjugated to bacteriophage Qb. Immunization of mice with these constructs led to highly potent antibody responses with IgG titers over one million, which are among the highest anti-MUC1 IgG titers reported to date. Furthermore, the high IgG antibody levels persisted for more than six months. The constructs also elicited MUC1 specific cytotoxic T cells, which can selectively kill MUC1 positive tumor cells...
May 21, 2018: ACS Chemical Biology
https://www.readbyqxmd.com/read/29781997/antimicrobial-peptides-produced-by-selective-pressure-incorporation-of-non-canonical-amino-acids
#20
Jessica H Nickling, Tobias Baumann, Franz-Josef Schmitt, Maike Bartholomae, Oscar P Kuipers, Thomas Friedrich, Nediljko Budisa
Nature has a variety of possibilities to create new protein functions by modifying the sequence of the individual amino acid building blocks. However, all variations are based on the 20 canonical amino acids (cAAs). As a way to introduce additional physicochemical properties into polypeptides, the incorporation of non-canonical amino acids (ncAAs) is increasingly used in protein engineering. Due to their relatively short length, the modification of ribosomally synthesized and post-translationally modified peptides by ncAAs is particularly attractive...
May 4, 2018: Journal of Visualized Experiments: JoVE
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