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https://www.readbyqxmd.com/read/28821765/the-protective-action-of-osmolytes-on-the-deleterious-effects-of-gamma-rays-and-atmospheric-pressure-plasma-on-protein-conformational-changes
#1
Pankaj Attri, Minsup Kim, Thapanut Sarinont, Eun Ha Choi, Hyunwoong Seo, Art E Cho, Kazunori Koga, Masaharu Shiratani
Both gamma rays and atmospheric pressure plasma are known to have anticancer properties. While their mechanism actions are still not clear, in some contexts they work in similar manner, while in other contexts they work differently. So to understand these relationships, we have studied Myoglobin protein after the treatment of gamma rays and dielectric barrier discharge (DBD) plasma, and analyzed the changes in thermodynamic properties and changes in the secondary structure of protein after both treatments. The thermodynamic properties were analyzed using chemical and thermal denaturation after both treatments...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28817152/gradient-free-determination-of-isoelectric-points-of-proteins-on-chip
#2
Urszula Łapińska, Kadi L Saar, Emma V Yates, Therese W Herling, Thomas Müller, Pavan K Challa, Christopher M Dobson, Tuomas P J Knowles
The isoelectric point (pI) of a protein is a key characteristic that influences its overall electrostatic behaviour. The majority of conventional methods for the determination of the isoelectric point of a molecule rely on the use of spatial gradients in pH, although significant practical challenges are associated with such techniques, notably the difficulty in generating a stable and well controlled pH gradient. Here, we introduce a gradient-free approach, exploiting a microfluidic platform which allows us to perform rapid pH change on chip and probe the electrophoretic mobility of species in a controlled field...
August 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28812137/myoglobinemia-markers-with-potential-applications-in-forensic-sample-analysis-lipid-markers-in-myoglobinemia-for-postmortem-blood
#3
Hiroko Abe, Daisuke Yajima, Yumi Hoshioka, Akina Nara, Sayaka Nagasawa, Hirotaro Iwase
The crush syndrome, in which rhabdomyolysis and trauma occur as a result of heat stroke and drug intoxication, can lead to myoglobinemia. This condition can be diagnosed by measuring myoglobin (Mb) levels in blood and urine. However, postmortem Mb levels are unreliable indicators, since blood Mb concentration drastically increases within a very short time after death and urine cannot always be obtained at dissection; this makes it difficult to diagnose myoglobinemia in a corpse. To address this issue, in this study, we used a lipidomics approach to identify markers that can be used to detect myoglobinemia in postmortem blood samples...
August 15, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28811700/primary-myoglobinuria-differentiate-myoglobinuria-from-hemoglobinuria
#4
Dhiraj J Trivedi, Shrirang P Kulkarni, Rakesh Mudaraddi
Myoglobin is dark red colour heme containing protein, stored in muscle. Change in permeability of myolemma causes myoglobin leak in plasma, which is cleared by kidney swiftly. Differentiating myoglobinuria from hemoglobinuria is important. Clinicians concern over myoglobinuria is to protect the patient from acute renal disease. We present a case of primary myoglobinuria, its clinical symptoms, diagnosis and treatment.
July 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28811208/macromolecular-crowding-induces-molten-globule-state-in-the-native-myoglobin-at-physiological-ph
#5
Khalida Nasreen, Shahzaib Ahamad, Faizan Ahmad, Md Imtaiyaz Hassan, Asimul Islam
Here, we report the formation of molten globule state of the native myoglobin in crowded environment. We have used Soret absorption spectroscopy and far-UV circular dichroism to monitor changes in tertiary and secondary structures of myoglobin, respectively. Our results reveal that in the presence of ficoll 70, the secondary structure of myoglobin remains unchanged while tertiary structure is lost significantly. 1-anilinonaphthalene-8-sulfonate binding experiments showed that myoglobin in the presence of various concentrations of ficoll 70, has newly exposed hydrophobic surfaces...
August 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28801044/cationic-ionic-liquid-surfactant-polyacrylamide-gel-electrophoresis-for-enhanced-separation-of-acidic-and-basic-proteins-with-single-step-ribonuclease-b-glycoforms-separation
#6
Punprabhashi Vidanapathirana, Farhana Hasan, Kaitlyn Mussio, Anuja Pande, Michael Brands, Noureen Siraj, Anne Grove, Isiah M Warner
Cationic ionic liquids-based surfactants (ILS), such as 4-methyl pyridinium bromide (CnPBr, where n=4,6,8), were used in preparation of polyacrylamide gels, sample buffer, and running buffer for cationic ILS polyacrylamide gel electrophoresis (ILS-PAGE). These ILS are liquids in the pure state and were selected for improved separation of ribonuclease b (Rib b) glycoforms in a single step and a protein mixture containing bovine serum albumin (BSA, pI-4.8, 66.5kDa), ovalbumin (Ova, pI-4.6, 44.3kDa), α-chymotrypsinogen (α-Chy, pI-8...
July 29, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28799760/biomolecular-structure-information-from-high-speed-quantum-mechanical-electronic-spectra-calculation
#7
Jakob Seibert, Christoph Bannwarth, Stefan Grimme
A fully quantum mechanical (QM) treatment to calculate electronic absorption (UV-Vis) and circular dichroism (CD) spectra of typical biomolecules with thousands of atoms is presented. With our highly efficient sTDA-xTB method, spectra averaged along structures from molecular dynamics (MD) simulations can be computed in a reasonable time frame on standard desktop computers. This way, non-equilibrium structure and conformational as well as purely quantum mechanical effects like charge-transfer or exciton-coupling are included...
August 11, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28798140/the-hemoglobin-homolog-cytoglobin-in-smooth-muscle-inhibits-apoptosis-and-regulates-vascular-remodeling
#8
Frances L Jourd'heuil, Haiyan Xu, Timothy Reilly, Keneta McKellar, Chaymae El Alaoui, Julia Steppich, Yong Feng Liu, Wen Zhao, Roman Ginnan, David Conti, Reynold Lopez-Soler, Arif Asif, Rebecca K Keller, John J Schwarz, Le Thi Thanh Thuy, Norifumi Kawada, Xiaochun Long, Harold A Singer, David Jourd'heuil
OBJECTIVE: The role of hemoglobin and myoglobin in the cardiovascular system is well established, yet other globins in this context are poorly characterized. Here, we examined the expression and function of cytoglobin (CYGB) during vascular injury. APPROACH AND RESULTS: We characterized CYGB content in intact vessels and primary vascular smooth muscle (VSM) cells and used 2 different vascular injury models to examine the functional significance of CYGB in vivo. We found that CYGB was strongly expressed in medial arterial VSM and human veins...
August 10, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28797427/low-level-tragus-stimulation-for-the-treatment-of-ischemia-and-reperfusion-injury-in-patients-with-st-segment-elevation-myocardial-infarction-a-proof-of-concept-study
#9
Lilei Yu, Bing Huang, Sunny S Po, Tuantuan Tan, Menglong Wang, Liping Zhou, Guannan Meng, Shenxu Yuan, Xiaoya Zhou, Xuefei Li, Zhuo Wang, Songyun Wang, Hong Jiang
OBJECTIVES: The aim of this study was to investigate whether low-level tragus stimulation (LL-TS) treatment could reduce myocardial ischemia-reperfusion injury in patients with ST-segment elevation myocardial infarction (STEMI). BACKGROUND: The authors' previous studies suggested that LL-TS could reduce the size of myocardial injury induced by ischemia. METHODS: Patients who presented with STEMI within 12 h of symptom onset, treated with primary percutaneous coronary intervention, were randomized to the LL-TS group (n = 47) or the control group (with sham stimulation [n = 48])...
August 14, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28795725/rational-design-of-artificial-dye-decolorizing-peroxidases-using-myoglobin-by-engineering-tyr-trp-in-the-heme-center
#10
Le-Le Li, Hong Yuan, Fei Liao, Bo He, Shu-Qin Gao, Ge-Bo Wen, Xiangshi Tan, Ying-Wu Lin
The rational design of metalloenzymes provides advantages not only for illustrating the structure and function relationship of native enzymes, but also for creating functional artificial enzymes comparable to native enzymes. Dye-decolorizing peroxidases (DyPs) are a new family of heme peroxidases and have received much attention recently. Inspired by the structural features of native DyPs with multiple Tyr and Trp residues, we herein aimed to design functional artificial DyPs using myoglobin (Mb), an O2 carrier as a protein scaffold, by further introduction of Tyr/Trp into the secondary sphere of the heme center in the F43Y Mb mutant...
August 10, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28783097/role-of-salivary-biomarkers-in-detection-of-cardiovascular-diseases-cvd
#11
REVIEW
Saad Abdul Rehman, Zohaib Khurshid, Fayez Hussain Niazi, Mustafa Naseem, Hamed Al Waddani, Haafsa Arshad Sahibzada, Rabia Sannam Khan
Human whole mouth saliva (WMS) is secreted by salivary glands, namely parotid, submandibular/sublingual and other minor glands of the oral cavity. It is secreted in a systematic way, and contain informative proteins and peptides for the early detection of contagious diseases and organ-related diseases. The role of WMS as a liquid biopsy for the detection of cardiovascular diseases (CVD) through Myoglobin (MYO), Cardiac troponin I (cTnI), Creatine phosphokinase MB (CK-MB), Myeloperoxidase (MPO), brain natriuretic peptide (NT-proBNP), Exosomal miRNA, C-Reactive Protein (CRP), Matrix metalloproteinase-8 (MMP-8), MMP-9 and tissue inhibitor of MMP-8 (TIMP-1), leukotriene B4 has been well reported in last decade, that have been reviewed in the literature comprehensively below...
August 7, 2017: Proteomes
https://www.readbyqxmd.com/read/28782814/comparative-study-of-the-influence-of-hawthorn-crataegus-monogyna-berries-ethanolic-extract-and-butylated-hydroxylanisole-bha-on-lipid-peroxidation-myoglobin-oxidation-consistency-and-firmness-of-minced-pork-during-refrigeration
#12
Camelia Papuc, Corina Nicoleta Predescu, Liliana Tudoreanu, Valentin Nicorescu, Iuliana Gajaila
BACKGROUND: Following public concern on the use of synthetic food antioxidants, there is an increasing demand for the application of mixed or purified natural antioxidants to maintain meat produces quality during storage. The aim of this research was to investigate the effect of hawthorn berries' ethanolic extract compared to butylated hydroxylanisole (BHA), on lipid peroxidation, myoglobin oxidation, protein electrophoresis pattern, consistency and firmness of minced pork during refrigeration at 4 °C and to identify the relationship between chemical modifications and consistency variation...
August 7, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28782436/charcot-leyden-crystals-do-they-exist-in-veterinary-species-a-case-report-and-literature-review
#13
Eunju Choi, Andrew D Miller, Elizabeth Devenish, Makoto Asakawa, Marina McConkey, Jeanine Peters-Kennedy
The Charcot-Leyden crystal (CLC) is a major human eosinophil protein that readily crystallizes; these crystals are common in eosinophilic diseases. Although anecdotal existence of these crystals is known in veterinary pathology, definitive reports do not exist, to our knowledge. We identified eosinophilic crystals in a laryngeal myxosarcoma from a 2-y-old, spayed female, Labrador Retriever dog that were tentatively interpreted as CLCs. However, Ziehl-Neelsen acid-fast stain was negative, arguing against CLCs...
August 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28775253/vertical-paper-analytical-devices-fabricated-using-the-principles-of-quilling-and-kirigami
#14
Bingbing Gao, Junjie Chi, Hong Liu, Zhongze Gu
Here we report the vertical paper analytical devices (vPADs) fabricated using the principles of quilling and kirigami. What differentiates the vPADs from conventional paper microfluidic devices is that the paper substrate used to fabricate the device is placed vertically to the device plane. The fabrication of vPADs with high precision is instrument-free, requiring no photolithography, printing or heating. Two- and three-dimensional vPADs are fabricated for multiplex colorimetric assays of four biochemical indicators and automated enzyme-linked immunosorbent assay of human myoglobin, respectively...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28773828/membrane-functionalization-with-hyperbranched-polymers
#15
Agnes Schulze, Marco Went, Andrea Prager
Polymer membranes have been modified with hyperbranched polymers with the aim to generate a high density of hydrophilic functional groups at the membrane surface. For this purpose hyperbranched polymers containing amino, alcohol, and carboxylic acid end groups were used for membrane modification, respectively. Thus, surface potential and charges were changed significantly to result in attractive or repulsive interactions towards three different proteins (albumin, lysozyme, myoglobin) that were used to indicate membrane fouling properties...
August 20, 2016: Materials
https://www.readbyqxmd.com/read/28773131/study-of-adsorption-and-desorption-performances-of-zr-based-metal-organic-frameworks-using-paper-spray-mass-spectrometry
#16
Xiaoting Wang, Ying Chen, Yajun Zheng, Zhiping Zhang
The dynamic pore systems and high surface areas of flexible metal-organic framework materials make them excellent candidates to be used in different kinds of adsorption processes. However, the adsorption and desorption behaviors of therapeutic drugs on metal-organic frameworks in solution are not fully developed. Here, we systematically investigated the adsorption and desorption behaviors of a typical therapeutic drug, verapamil, over several Zr-based metal-organic frameworks [e.g., Zr-FUM, UiO-66(Zr), UiO-66(Zr)-NH₂ and UiO-66(Zr)-2COOH] as well as ZrO₂ in an acetonitrile solution by using paper spray mass spectrometry...
July 8, 2017: Materials
https://www.readbyqxmd.com/read/28772074/molecular-interactions-of-protein-with-tio2-by-the-afm-measured-adhesion-force
#17
Yihui Dong, Rong An, Shuangliang Zhao, Wei Cao, Liangliang Huang, Wei Zhuang, Linghong Lu, Xiaohua Lu
Understanding the interactions between porous materials and biosystems is of great important in biomedical and environmental sciences. Upon atomic force microscopy (AFM) adhesion measurement, a new experimental approach was presented here to determine the molecular interaction force between proteins and mesoporous TiO2 of various surface roughnesses. The interaction force between each protein molecule and the pure anatase TiO2 surface was characterized by fitting the adhesion and adsorption capacity per unit contact area, and it was found that the adhesion forces were approximately 0...
August 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28768416/manganese-and-cobalt-in-the-nonheme-metal-binding-site-of-a-biosynthetic-model-of-heme-copper-oxidase-superfamily-confer-oxidase-activity-through-redox-inactive-mechanism
#18
Julian H Reed, Yelu Shi, Qianhong Zhu, Saumen Chakraborty, Evan N Mirts, Igor D Petrik, Ambika Bhagi-Damodaran, Matthew Ross, Pierre Moënne-Loccoz, Yong Zhang, Yi Lu
The presence of nonheme metal, such as copper and iron, in the heme-copper oxidase (HCO) superfamily is critical to the enzymatic activity of reducing O2 to H2O, but the exact mechanism the nonheme metal ion uses to confer and fine-tune the activity remains to be understood. We report that manganese and cobalt can bind to the same nonheme site and confer HCO activity in a heme-nonheme biosynthetic model in myoglobin. While the initial rates of O2 reduction by the Mn, Fe and Co derivatives are similar, the percentage of reaction active species formation are 7%, 4% and 1% and the total turnovers are 5...
August 3, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28768187/interaction-of-myoglobin-colloids-with-bsa-in-solution-insights-into-complex-formation-and-elastic-compliance
#19
D Madhumitha, Aruna Dhathathreyan
This work focusses on the supramolecular complex formed between Myoglobin (Mb) and Bovine Serum Albumin (BSA) at colloids/solution interface at pH 4.0 and pH 7.5. Electrostatic interactions between Mb as colloids and BSA solution (pH=7.5 and 4.0) have been confirmed by Zeta potential that suggest that while Mb has a narrow interaction range, BSA has a wider interaction space. The organization of Mb colloids in BSA characterized using dilational rheological parameters show that the Mb colloids are elastic and the strong adsorbed water layers on the surface restrict the deformation, regulated by the viscoelastic surface layer...
July 30, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28763782/molecular-imprinting-coupled-with-electrochemical-analysis-for-plasma-samples-classification-in-acute-myocardial-infarction-diagnostic
#20
Victoria V Shumyantseva, Tatiana V Bulko, Larisa V Sigolaeva, Alexey V Kuzikov, Pavel V Pogodin, Alexander I Archakov
Electroanalysis of myoglobin (Mb) in 10 plasma samples of healthy donors (HDs) and 14 plasma samples of patients with acute myocardial infarction (AMI) was carried out with screen-printed electrodes modified first with multi-walled carbon nanotubes (MWCNT) and then with a molecularly imprinted polymer film (MIP), viz., myoglobin-imprinted electropolymerized poly(o-phenylenediamine). The differential pulse voltammetry (DPV) parameters, such as a maximum amplitude of reduction peak current (A, nA), a reduction peak area (S, nA × V), and a peak potential (P, V), were measured for the MWCNT/MIP-sensors after their incubation with non-diluted plasma...
July 20, 2017: Biosensors & Bioelectronics
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