keyword
MENU ▼
Read by QxMD icon Read
search

Human bonding

keyword
https://www.readbyqxmd.com/read/28636973/amide-to-triazole-switch-vs-in-vivo-nep-inhibition-approaches-to-promote-radiopeptide-targeting-of-grpr-positive-tumors
#1
Theodosia Maina, Aikaterini Kaloudi, Ibai E Valverde, Thomas L Mindt, Berthold A Nock
INTRODUCTION: Radiolabeled bombesin (BBN)-analogs have been proposed for diagnosis and therapy of gastrin-releasing peptide receptor (GRPR)-expressing tumors, such as prostate, breast and lung cancer. Metabolic stability represents a crucial factor for the success of this approach by ensuring sufficient delivery of circulating radioligand to tumor sites. The amide-to-triazole switch on the backbone of DOTA-PEG4-[Nle(14)]BBN(7-14) (1) was reported to improve the in vitro stability of resulting (177)Lu-radioligands...
June 10, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28636914/peptide-protein-binding-investigated-by-far-ir-spectroscopy-and-molecular-dynamics-simulations
#2
Yoann Cote, Yves Nominé, Juan Ramirez, Petra Hellwig, Roland H Stote
Molecular dynamics (MD) simulations and far-infrared (far-IR) spectroscopy were combined to study peptide binding by the second PDZ domain (PDZ1) of MAGI1, which has been identified as an important target for the Human Papilloma Virus. PDZ1 recognizes and binds to the C-terminal end of the E6 protein from high-risk Human Papilloma Virus. The far-IR spectra of two forms of the protein, an unbound APO form and a HOLO form (where the PDZ1 is bound to an 11-residue peptide derived from the C terminus of HPV16 E6), were obtained...
June 20, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28636382/development-of-efficient-chemistry-to-generate-site-specific-disulfide-linked-protein-and-peptide-payload-conjugates-application-to-thiomab%C3%A2-antibody-drug-conjugates
#3
Jack David Sadowsky, Thomas H Pillow, Jinhua Chen, Fang Fan, Changrong He, Yanli Wang, Gang Yan, Hui Yao, Zijin Xu, Shanique Martin, Donglu Zhang, Phillip Chu, Josefa Dela Cruz-Chuh, Aimee O'Donohue, Guangmin Li, Geoffrey Del Rosario, Jintang He, Luna Liu, Carl K Ng, Dian Su, Gail D Lewis Phillips, Katherine Ruth Kozak, Shang-Fan Yu, Keyang Xu, Douglas Leipold, John S Wai
Conjugation of small molecule payloads to specific cysteine residues on proteins via a disulfide bond represents an attractive strategy to generate redox-sensitive bioconjugates, which have value as potential diagnostic reagents or therapeutics. Advancement of such "direct-disulfide" bioconjugates to the clinic necessitates chemical methods to form disulfide connections efficiently, without byproducts. The disulfide connection must also be resistant to premature cleavage by thiols prior to arrival at the targeted tissue...
June 21, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28636321/copper-oxide-nanoparticles-induce-lysogenic-bacteriophage-and-metal-resistance-genes-in-pseudomonas-aeruginosa-pao1
#4
Jianhua Guo, Shu-Hong Gao, Ji Lu, Philip L Bond, Willy Verstraete, Zhiguo Yuan
The intensive use of metal-based nanoparticles results in their continuous release into the environment, leading to potential risks for human health and microbial ecosystems. Although previous studies have indicated that nanoparticles may be toxic to microorganisms, there is a scarcity of data available to assess the underlying molecular mechanisms of inhibitory and biocidal effects of nanoparticles on microorganisms. This study used physiological experiments, microscopy, Live/Dead staining and the genome-wide RNA sequencing to investigate the multiple responses of Pseudomonas aeruginosa to the exposure of copper oxide nanoparticles (CuO NPs)...
June 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28635626/adiponectin-a-therapeutic-target-for-obesity-diabetes-and-endothelial-dysfunction
#5
REVIEW
Arunkumar E Achari, Sushil K Jain
Adiponectin is the most abundant peptide secreted by adipocytes, whose reduction plays a central role in obesity-related diseases, including insulin resistance/type 2 diabetes and cardiovascular disease. In addition to adipocytes, other cell types, such as skeletal and cardiac myocytes and endothelial cells, can also produce this adipocytokine. Adiponectin effects are mediated by adiponectin receptors, which occur as two isoforms (AdipoR1 and AdipoR2). Adiponectin has direct actions in liver, skeletal muscle, and the vasculature...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28634583/circular-rnas-biogenesis-function-and-role-in-human-diseases
#6
REVIEW
John Greene, Anne-Marie Baird, Lauren Brady, Marvin Lim, Steven G Gray, Raymond McDermott, Stephen P Finn
Circular RNAs (circRNAs) are currently classed as non-coding RNA (ncRNA) that, unlike linear RNAs, form covalently closed continuous loops and act as gene regulators in mammals. They were originally thought to represent errors in splicing and considered to be of low abundance, however, there is now an increased appreciation of their important function in gene regulation. circRNAs are differentially generated by backsplicing of exons or from lariat introns. Unlike linear RNA, the 3' and 5' ends normally present in an RNA molecule have been joined together by covalent bonds leading to circularization...
2017: Frontiers in Molecular Biosciences
https://www.readbyqxmd.com/read/28634060/potent-inhibitions-of-monoamine-oxidase-a-and-b-by-acacetin-and-its-7-o-6-o-malonylglucoside-derivative-from-agastache-rugosa
#7
Hyun Woo Lee, Hyung Won Ryu, Seung Cheol Baek, Myung-Gyun Kang, Daeui Park, Hyoung-Yun Han, Ju Hyeon An, Sei-Ryang Oh, Hoon Kim
Five compounds were isolated from the leaves of Agastache rugosa and tested for monoamine oxidase (MAO) inhibitory activity. Acacetin, a flavonoid, potently inhibited recombinant human MAO-A and MAO-B (IC50=0.19 and 0.17μM, respectively), and reversibly and competitively inhibited MAO-A and MAO-B (Ki=0.045 and 0.037μM, respectively). Acacetin 7-O-(6-O-malonylglucoside) (AMG) was also found to effectively inhibit MAO-A and MAO-B (IC50=2.34 and 1.87μM, respectively), and to reversibly and competitively inhibit MAO-A and MAO-B (Ki=1...
June 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28632987/the-usher-syndrome-type-iiib-histidyl-trna-synthetase-mutation-confers-temperature-sensitivity
#8
Jamie A Abbott, Ethan Guth, Cindy Kim, Cathy Regan, Victoria M Siu, Charles Anthony Rupar, Borries Demeler, Christopher S Francklyn, Susan M Robey-Bond
Histidyl-tRNA synthetase (HARS) is a highly conserved translation factor that plays an essential role in protein synthesis. HARS has been implicated in the human syndromes Charcot-Marie-Tooth (CMT) Type 2W and Type IIIB Usher (USH3B). The USH3B mutation, which encodes an Y454S substitution in HARS, is inherited in an autosomal recessive fashion and associated with childhood deafness, blindness and episodic hallucinations during acute illness. The biochemical basis of the pathophysiologies linked to USH3B is currently unknown...
June 20, 2017: Biochemistry
https://www.readbyqxmd.com/read/28632765/ctrp3-is-a-novel-biomarker-for-diabetic-retinopathy-and-inhibits-hghl-induced-vcam-1-expression-in-an-ampk-dependent-manner
#9
Zheyi Yan, Jianli Zhao, Lu Gan, Yanqing Zhang, Rui Guo, Xiaoming Cao, Wayne Bond Lau, Xin Ma, Yajing Wang
OBJECTIVES: Diabetic retinopathy (DR) is a severe complication of chronic diabetes. The C1q/TNF-related protein family (CTRPs) has been demonstrated to exert protective effects against obesity and atherosclerosis in animal studies. Heretofore, the association between circulating CTRPs and DR patients has been unexplored. In the current study, we attempt to define this association, as well as the effect of CTRPs upon DR pathophysiology. DESIGN: The present investigation is a case control study that enrolled control subjects and type 2 diabetes mellitus (T2DM) patients diagnosed with DR...
2017: PloS One
https://www.readbyqxmd.com/read/28632421/novel-urushiol-derivatives-as-hdac8-inhibitors-rational-design-virtual-screening-molecular-docking-and-molecular-dynamics-studies
#10
Hao Zhou, Chengzhang Wang, Tao Deng, Ran Tao, Wenjun Li
Three series of novel urushiol derivatives were designed by introducing a hydroxamic acid moiety into the tail of an alkyl side chain and substituents with differing electronic properties or steric bulk onto the benzene ring and alkyl side chain. The compounds' binding affinity towards HDAC8 was screened by Glide docking. The highest-scoring compounds were processed further with molecular docking, MD simulations and binding free energy studies to analyze the binding modes and mechanisms. Ten compounds had Glide scores of -8...
June 20, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28631482/carbohydrate-bis-acetal-based-substrates-as-tunable-fluorescence-quenched-probes-for-monitoring-exo-glycosidase-activity
#11
Samy Cecioni, David J Vocadlo
Tunable Förster resonance energy transfer (FRET)-quenched substrates are useful for monitoring the activity of various enzymes within their relevant physiological environments. Development of FRET-quenched substrates for exo-glycosidases, however, has been hindered by their constrained pocket-shaped active sites. Here we report the design of a new class of substrate that overcomes this problem. These Bis-Acetal-Based Substrates (BABS) bear a hemiacetal aglycon leaving group that tethers fluorochromes in close proximity, also positioning them distant from the active site pocket...
June 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28631071/oxidation-of-c18-hydroxy-polyunsaturated-fatty-acids-to-epoxide-or-ketone-by-catalase-related-hemoproteins-activated-with-iodosylbenzene
#12
Tarvi Teder, William E Boeglin, Alan R Brash
Small catalase-related hemoproteins with a facility to react with fatty acid hydroperoxides were examined for their potential mono-oxygenase activity when activated using iodosylbenzene. The proteins tested were a Fusarium graminearum 41 kD catalase hemoprotein (Fg-cat, gene FGSG_02217), a Pseudomonas fluorescens Pfl01 catalase (37.5 kD, accession number WP_011333788.1), and a Mycobacterium avium ssp. paratuberculosis 33 kD catalase (gene MAP-2744c). 13-Hydroxy-octadecenoic acids (which are normally unreactive) were selected as substrates because these enzymes react specifically with the corresponding 13S-hydroperoxides (Pakhomova et al...
June 19, 2017: Lipids
https://www.readbyqxmd.com/read/28629973/%C3%AE-eleostearic-acid-containing-triglycerides-for-a-continuous-assay-to-determine-lipase-sn-1-and-sn-3-regio-preference
#13
Meddy El Alaoui, Laurent Soulère, Alexandre Noiriel, Yves Queneau, Abdelkarim Abousalham
Lipases are essentially described as sn-1 and sn-3 regio-selective. Actually few methods are available to measure this lipase regio-selectivity, moreover they require chiral chromatography analysis or specific derivations which are discontinuous and time consuming. In this study we describe a new, convenient, sensitive and continuous spectrophotometric method to screen lipases regio-selectivity using synthetic triglycerides (TG) containing α-eleostearic acid (9Z, 11E, 13E-octadecatrienoic acid) either at the sn-1 position [1-α-eleostearoyl-2,3-octadecyl-sn-glycerol (sn-EOO)] or at the sn-3 position [1,2-octadecyl-3-α-eleostearoyl-sn-glycerol (sn-OOE)] and coated onto the wells of microtiter plates...
June 16, 2017: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/28629893/a-new-nir-triggered-dox-and-icg-co-delivery-system-for-enhanced-multidrug-resistant-cancer-treatment-through-simultaneous-chemo-photothermal-photodynamic-therapy
#14
Yanna Yu, Zhipeng Zhang, Yun Wang, Hao Zhu, Fangzhou Li, Yuanyuan Shen, Shengrong Guo
It is a great challenge to combat multidrug resistant (MDR) cancer effectively. To address this issue, we developed a new near-infrared (NIR) triggered chemotherapeutic agent doxorubicin (DOX) and photosensitizer indocyanine green (ICG) co-release system by aid of NIR induced photothermal effect of gold nanocages (AuNCs) and temperature sensitive phase-change property of 1-tetradecanol at its melting point of 39°C, which could simultaneously exerted chemo/photothermal/photodynamic treatment on MDR human breast cancer MCF-7/ADR cells...
June 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28629518/analysis-of-the-asymmetry-of-activated-epo-receptor-enables-designing-small-molecule-agonists
#15
Frank Guarnieri
Amgen solved the high-resolution cocrystal structure of erythropoietin (EPO) bound to the extracellular part of the receptor (EPOR) in 1998, which reveals that the EPO-EPOR interaction surface is formed by 11 salt bridges, 17 H-bonds, and 2 hydrophobic clusters centered at a pair of crucial phenylalanines (F93). The EPOR has two domains, one that penetrates the membrane and a second extracellular domain that forms one arm of the binding site for the EPO ligand. The complete competent receptor-binding site is a homodimer of EPOR with the two arms forming a funnel-shaped cup where EPO binds...
2017: Vitamins and Hormones
https://www.readbyqxmd.com/read/28629388/the-albumin-exendin-4-recombinant-protein-e2hsa-improves-glycemic-control-and-%C3%AE-cell-function-in-spontaneous-diabetic-kkay-mice
#16
Caina Li, Shaocong Hou, Shuainan Liu, Yi Huan, Sujuan Sun, Quan Liu, Zhufang Shen
BACKGROUND: E2HSA is a genetic fusion protein that consists of two tandem exendin-4 molecules that are covalently bonded to recombinant human serum albumin via a peptide linker. Previous studies have demonstrated that E2HSA significantly decreased blood glucose levels, improved β-cell function and promoted β-cell proliferation in diabetic db/dB mice. This study aimed to evaluate the benefits of E2HSA on glucose and lipid metabolism in a spontaneous diabetes animal model, KKAy mice. METHODS: E2HSA was acutely administered at doses of 1, 3 and 9 mg/kg by subcutaneous injection in diabetic KKAy mice with exendin-4 (2 μg/kg) as a positive reference, and then the non-fasting blood glucose and food intake levels were dynamically monitored...
June 19, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28628788/cryo-em-structures-of-human-%C3%AE-secretase
#17
REVIEW
Guanghui Yang, Rui Zhou, Yigong Shi
γ-secretase, a membrane-embedded aspartate protease, catalyzes peptide bond hydrolysis of a large variety of type I integral membrane proteins exemplified by amyloid precursor protein (APP). Cleavage of APP leads to formation of β-amyloid plaque, which is a hallmark of Alzheimer's disease (AD). Over 200 AD-associated mutations are mapped to presenilin 1 (PS1), the catalytic component of γ-secretase. In the past three years, several cryo-electron microscopy (cryo-EM) structures of human γ-secretase have been determined at near atomic resolutions...
June 16, 2017: Current Opinion in Structural Biology
https://www.readbyqxmd.com/read/28628302/highly-fe3-selective-fluorescent-nanoprobe-based-on-ultra-bright-n-p-co-doped-carbon-dots-and-its-application-in-biological-samples
#18
Jingfang Shangguan, Jin Huang, Dinggeng He, Xiaoxiao He, Kemin Wang, Runzhi Ye, Xue Yang, Taiping Qing, Jinlu Tang
Measuring the levels of Fe3+ in human body has attracted considerable attention for health monitoring as it plays an essential element in many physiological processes. In this work, we reported a selective fluorescent nanoprobe for Fe3+ detection in biological samples based on ultra-bright N/P co-doped carbon dots. By employing adenosine 5'-triphosphate (ATP) as the carbon, nitrogen and phosphorus source, the N/P co-doped carbon dots could be simply prepared through hydrothermal treatment. The obtained carbon dots exhibited high quantum yields up to 43...
June 19, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28621281/evaluation-of-microleakage-in-class-v-restorations-with-three-different-adhesive-systems
#19
Shamim Anjum, Azar Malik, Satish Sharma
AIM: This study was conducted to evaluate the microleakage of class V cavities restored with composite resin and different adhesive systems. MATERIALS AND METHODS: In this experimental epidemiological investigation, a total of 75 freshly extracted human teeth were collected. The teeth were randomly divided into three groups (n = 25). Three different intermediate adhesive materials (Clearfil SE Bond, Single Bond, and Xeno III) were used for each group. RESULTS: On testing without the application of occlusal load, the maximum microleakage was seen for group III (Xeno III) followed by group I (Clearfil SE) and then group II (Single Bond)...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28620198/hydrogen-gas-protects-ip3rs-by-reducing-disulfide-bridges-in-human-keratinocytes-under-oxidative-stress
#20
Ching-Ying Wu, Wen-Li Hsu, Ming-Hsien Tsai, Jui-Lin Liang, Jian-He Lu, Chia-Jung Yen, Hsin-Su Yu, Mami Noda, Chi-Yu Lu, Chu-Huang Chen, Shian-Jang Yan, Tohru Yoshioka
Based on the oxidative stress theory, aging derives from the accumulation of oxidized proteins induced by reactive oxygen species (ROS) in the cytoplasm. Hydrogen peroxide (H2O2) elicits ROS that induces skin aging through oxidation of proteins, forming disulfide bridges with cysteine or methionine sulfhydryl groups. Decreased Ca(2+) signaling is observed in aged cells, probably secondary to the formation of disulfide bonds among Ca(2+) signaling-related proteins. Skin aging processes are modeled by treating keratinocytes with H2O2...
June 15, 2017: Scientific Reports
keyword
keyword
50105
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"