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https://www.readbyqxmd.com/read/28813053/copper-ii-benzimidazole-complexes-as-efficient-fluorescent-probes-for-l-cysteine-in-water
#1
Duraiyarasu Maheshwaran, Selvarasu Priyanga, Ramasamy Mayilmurugan
Copper(ii) complexes [Cu(L1)(H2O)2](SO3CF3)21 and [Cu(L2)(H2O)2](SO3CF3)22 based on 2,6-bis(benzimidazolyl)pyridine were synthesized and are reported herein as highly selective "turn-on" optical probes for l-cysteine. The Cu(ii)/Cu(i) redox potential of probe 1 (0.14 V vs. NHE) was lower than that of 2 (0.233 V vs. NHE) in water. The molecular structure of 2 adopted a square pyramidal geometry (τ = 0.2545), with the Cu-Npy bond (1.958 Å) of its middle pyridine unit being shorter than the other two Cu-Nbenzim bonds (Cu-N, 1...
August 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28813015/transcriptional-responses-of-creeping-bentgrass-to-2-3-butanediol-a-bacterial-volatile-compound-bvc-analogue
#2
Yi Shi, Kuiju Niu, Bingru Huang, Wenhui Liu, Huiling Ma
Bacterial volatile compounds (BVCs) have been reported to enhance plant growth and elicit plant defenses against fungal infection and insect damage. The objective of this study was to determine transcriptomic changes in response to synthetic BVC that could be associated with plant resistance to Rhizoctonia solani in creeping bentgrass. The 2,3-butanediol (BD) (250 µM) was sprayed on creeping bentgrass leaves grown in jam jars. The result showed that synthetic BD induced plant defense against R. solani for creeping bentgrass...
August 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28812263/molecular-basis-of-oxytocin-receptor-signalling-in-the-brain-what-we-know-and-what-we-need-to-know
#3
Marta Busnelli, Bice Chini
Oxytocin (OT), a hypothalamic neuropeptide involved in regulating the social behaviour of all vertebrates, has been proposed as a treatment for a number of neuropsychiatric disorders characterised by deficits in the social domain. Over the last few decades, advances focused on understanding the social effects of OT and its role in physiological conditions and brain diseases, but much less has been done to clarify the molecular cascade of events involved in mediating such effects and in particular the cellular and molecular pharmacology of OT and its target receptor (OTR) in neuronal and glial cells...
August 16, 2017: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/28812125/recombinant-expression-and-biochemical-characterization-of-mycobacterium-tuberculosis-3fe-4s-ferredoxin-rv1786
#4
Yun Lu, Feng Qiao, Yue Li, Xiao-Hong Sang, Cong-Ran Li, Jian-Dong Jiang, Xin-Yi Yang, Xue-Fu You
Ferredoxins are iron-sulfur protein that mediate electron transfer in cytochrome P450 mono-oxygenase (CYP)-related catalytic reactions in a wide variety of organisms. Rv1786 is a putative ferredoxin, encoded by a gene located downstream of the gene encoding CYP143A1 in the Mycobacterium tuberculosis genome. However, the structure and function of Rv1786 have remained unclear. Here, the recombinant Mtb Rv1786 was expressed, purified as a His-tagged form and characterized with [3Fe-4S] clusters as its cofactors using a series of measurements including SDS-PAGE, western blot, UV/Visible, MALDI-TOF/TOF-MS, and electron paramagnetic resonance spectroscopic analysis...
August 15, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28812047/selected-missense-mutations-impair-frataxin-processing-in-friedreich-ataxia
#5
Elisia Clark, Jill S Butler, Charles J Isaacs, Marek Napierala, David R Lynch
OBJECTIVE: Frataxin (FXN) is a highly conserved mitochondrial protein. Reduced FXN levels cause Friedreich ataxia, a recessive neurodegenerative disease. Typical patients carry GAA repeat expansions on both alleles, while a subgroup of patients carry a missense mutation on one allele and a GAA repeat expansion on the other. Here, we report that selected disease-related FXN missense mutations impair FXN localization, interaction with mitochondria processing peptidase, and processing. METHODS: Immunocytochemical studies and subcellular fractionation were performed to study FXN import into the mitochondria and examine the mechanism by which mutations impair FXN processing...
August 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/28811900/slpi-and-anxa2-expression-in-neoplasm-free-palatine-tonsils-is-associated-with-smoking-habit-of-individuals
#6
Elgar S Quabius, Berit Bögershausen, Lukas Getzin, Tibor Görögh, Maximilian P Gebhard, Anna S Hoffmann, Markus Hoffmann
In order to confirm the inverse correlation between secretory leucocyte protease inhibitor (SLPI) expression, and human papillomavirus (HPV) infection previously observed in head and neck squamous-cell carcinoma, the present study retrospectively investigated the association between SLPI and Annexin A2 (AnxA2) expression, and HPV status in non-neoplastic chronic tonsillitis (n=118), and tonsillar hyperplasia (n=96) tissue. We hypothesised that smoking induces the upregulation of SLPI, resulting in reduced binding of HPV to AnxA2, a known modulator of HPV entry into the cell...
September 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28811863/long-noncoding-rnas-and-rna-binding-proteins-in-oxidative-stress-cellular-senescence-and-age-related-diseases
#7
REVIEW
Chongtae Kim, Donghee Kang, Eun Kyung Lee, Jae-Seon Lee
Cellular senescence is a complex biological process that leads to irreversible cell-cycle arrest. Various extrinsic and intrinsic insults are associated with the onset of cellular senescence and frequently accompany genomic or epigenomic alterations. Cellular senescence is believed to contribute to tumor suppression, immune response, and tissue repair as well as aging and age-related diseases. Long noncoding RNAs (lncRNAs) are >200 nucleotides long, poorly conserved, and transcribed in a manner similar to that of mRNAs...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28811689/expression-of-telomere-binding-proteins-rap1-and-pot1-in-renal-cell-carcinoma-and-their-correlation-with-clinicopathological-parameters
#8
Deeksha Pal, Shrawan Kumar Singh, Nandita Kakkar, Rajendra Prasad
Telomere stability is indispensable for continuous proliferation of cells. Telomere structure is maintained by group of six proteins termed as shelterin. RAP1 and POT1 proteins are significant members of shelterin complex. Expression of RAP1 and POT1 are crucial for telomere maintenance and hence uncontrolled division of cells. Notably, expression of RAP1 and POT1 is unknown in renal cell carcinoma (RCC). In view of these facts, the present study was initiated to investigate the expression of RAP1 and POT1 in RCC and their relationships with clinicopathological features...
July 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28811641/joint-inflammation-related-citrullination-of-functional-arginines-in-extracellular-proteins
#9
Kalle H Sipilä, Vipin Ranga, Pekka Rappu, Markku Mali, Laura Pirilä, Ilona Heino, Johanna Jokinen, Jarmo Käpylä, Mark S Johnson, Jyrki Heino
We report the extent, specific sites and structural requirements of joint inflammation related citrullination in extracellular proteins. A total of 40 synovial fluid samples derived from chronically inflamed human joints were analysed by heparin-agarose fractionation and LC-MS/MS. Citrullination of 55 arginines in extracellular proteins was detected. Importantly, 20% of the sites have a characterized function related to the hallmarks of destructive joint inflammation. E.g. four arginine residues, shown here to be citrullinated, are also affected by mutations in inherited diseases causing haemolysis or blood clotting dysfunction...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811629/forces-and-disease-electrostatic-force-differences-caused-by-mutations-in-kinesin-motor-domains-can-distinguish-between-disease-causing-and-non-disease-causing-mutations
#10
Lin Li, Zhe Jia, Yunhui Peng, Subash Godar, Ivan Getov, Shaolei Teng, Joshua Alper, Emil Alexov
The ability to predict if a given mutation is disease-causing or not has enormous potential to impact human health. Typically, these predictions are made by assessing the effects of mutation on macromolecular stability and amino acid conservation. Here we report a novel feature: the electrostatic component of the force acting between a kinesin motor domain and tubulin. We demonstrate that changes in the electrostatic component of the binding force are able to discriminate between disease-causing and non-disease-causing mutations found in human kinesin motor domains using the receiver operating characteristic (ROC)...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811604/multimerization-is-required-for-antigen-binding-activity-of-an-engineered-igm-igg-chimeric-antibody-recognizing-a-skin-related-antigen
#11
Kwesi Teye, Koji Hashimoto, Sanae Numata, Kunihiro Ohta, Marek Haftek, Takashi Hashimoto
Monoclonal antibodies offer great tools for research. We encountered a potentially useful mouse IgM monoclonal antibody whose antigen is expressed in normal skin but lost in human skin cancer. Because IgM is difficult to work with and the antigen was unknown, we decided to convert the IgM (µ) to IgG (γ) version. After cDNA for the antibody was obtained by RACE PCR, we made a series of molecules with different combinations of IgM and IgG domains. Whereas VH-Cµ1-Cµ2-Cγ3 and VH-Cµ1-Cµ2-Hinge-Cγ2-Cγ3 functionally bound to the antigen, VH-Cγ1-Hinge-Cγ2-Cγ3, VH-Cµ1-Hinge-Cγ2-Cγ3, and VH-Cµ1-Cµ2-Cγ2-Cγ3 did not...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811551/nano-metamaterials-for-ultrasensitive-terahertz-biosensing
#12
Dong-Kyu Lee, Ji-Hun Kang, Junghoon Kwon, Jun-Seok Lee, Seok Lee, Deok Ha Woo, Jae Hun Kim, Chang-Seon Song, Q-Han Park, Minah Seo
As a candidate for a rapid detection of biomaterials, terahertz (THz) spectroscopy system can be considered with some advantage in non-destructive, label-free, and non-contact manner. Because protein-ligand binding energy is in the THz range, especially, most important conformational information in molecular interactions can be captured by THz electromagnetic wave. Based on the THz time-domain spectroscopy system, THz nano-metamaterial sensing chips were prepared for great enhancing of detection sensitivity...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811360/involvement-of-midkine-in-the-development-of-pulmonary-fibrosis
#13
Kenichi Misa, Yoshinori Tanino, Xintao Wang, Takefumi Nikaido, Masami Kikuchi, Yuki Sato, Ryuichi Togawa, Mishie Tanino, Shinya Tanaka, Kenji Kadomatsu, Mitsuru Munakata
Midkine is a low-molecular-weight heparin-binding protein that is strongly expressed mainly in the midgestation period and has various physiological activities such as in development and cell migration. Midkine has been reported to be strongly expressed in cancer cells and in inflammation and repair processes, and to be involved in the pathogenesis of various diseases. However, its role in the lung is poorly understood. In this study, we analyzed the clinical characteristics of idiopathic pulmonary fibrosis patients in relation to midkine expression and used a mouse bleomycin-induced pulmonary fibrosis model to investigate the role of midkine in pulmonary fibrosis...
August 2017: Physiological Reports
https://www.readbyqxmd.com/read/28811323/il-22-induces-reg3%C3%AE-and-inhibits-allergic-inflammation-in-house-dust-mite-induced-asthma-models
#14
Takashi Ito, Koichi Hirose, Aiko Saku, Kenta Kono, Hiroaki Takatori, Tomohiro Tamachi, Yoshiyuki Goto, Jean-Christophe Renauld, Hiroshi Kiyono, Hiroshi Nakajima
Previous studies have shown that IL-22, one of the Th17 cell-related cytokines, plays multiple roles in regulating allergic airway inflammation caused by antigen-specific Th2 cells; however, the underlying mechanism remains unclear. Here, we show that allergic airway inflammation and Th2 and Th17 cytokine production upon intratracheal administration of house dust mite (HDM) extract, a representative allergen, were exacerbated in IL-22-deficient mice. We also found that IL-22 induces Reg3γ production from lung epithelial cells through STAT3 activation and that neutralization of Reg3γ significantly exacerbates HDM-induced eosinophilic airway inflammation and Th2 cytokine induction...
August 15, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28811306/replication-and-validation-of-genetic-polymorphisms-associated-with-survival-after-allogeneic-blood-or-marrow-transplant
#15
Ezgi Karaesmen, Abbas A Rizvi, Leah Preus, Philip L McCarthy, Marcelo C Pasquini, Kenan Onel, Xiaochun Zhu, Stephen Spellman, Christopher A Haiman, Daniel O Stram, Loreall Pooler, Xin Sheng, Qianqian Zhu, Li Yan, Qian Liu, Qiang Hu, Amy Webb, Guy Brock, Alyssa I Clay-Gilmour, Sebastiano Battaglia, David Tritchler, Song Liu, Theresa Hahn, Lara E Sucheston-Campbell
Multiple candidate gene association studies of non-HLA single nucleotide polymorphisms (SNPs) and outcomes after blood or marrow transplant (BMT) have been conducted. We identified 70 publications reporting 45 SNPs in 36 genes significantly associated with disease-related mortality, progression-free survival, transplant-related mortality and/or overall survival after BMT. Replication and validation of these SNP associations were performed using DISCOVeRY-BMT, a well-powered genome-wide association study consisting of two cohorts, totaling 2,883 BMT recipients with AML, ALL or MDS and their HLA-matched unrelated donors, treated from 2000-2011 and reported to the CIBMTR...
August 15, 2017: Blood
https://www.readbyqxmd.com/read/28811219/trinucleotide-repeat-containing-6c-tnrc6c-is-essential-for-microvascular-maturation-during-distal-airspace-sacculation-in-the-developing-lung
#16
Hua Guo, Yana Kazadaeva, Fabian E Ortega, Manjunath N Swamy, Tushar J Desai
GW182 (also known asTNRC6) family members are critically involved in the final effector phase of miRNA-mediated mRNA repression. The three mammalian paralogs, TNRC6a, b and c, are thought to be redundant based on Argonaute (Ago) binding, tethering assays, and RNAi silencing of individual members in cell lines. To test this idea, we generated TNRC6a, b and c knockout mice. TNRC6a mutants die at mid-gestation, while b- and c- deleted mice are born at a Mendelian ratio. However, the majority of TNRC6b and all TNRC6c mutants die within 24 hours after birth, the latter with respiratory failure...
August 12, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28811090/guanosine-exerts-antiplatelet-and-antithrombotic-properties-through-an-adenosine-related-camp-pka-signaling
#17
Francisco Fuentes, Marcelo Alarcón, Lina Badimon, Manuel Fuentes, Karl-Norbert Klotz, Gemma Vilahur, Sonja Kachler, Teresa Padró, Iván Palomo, Eduardo Fuentes
BACKGROUND: Guanosine is a natural product and an endogenous nucleoside that has shown to increase during myocardial ischemia. Platelets are critically involved in ischemic coronary events. It remains unknown, however, whether guanosine may affect platelet activation and function. We sought to investigate the potential antiplatelet and antithrombotic properties of guanosine and decipher the mechanisms behind. METHODS: We firstly assessed the effects of guanosine on platelet activation/aggregation upon stimulation with several platelet agonists including adenosine diphosphate (ADP), collagen, arachidonic acid (AA), and TRAP-6...
August 7, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28811068/a-positron-emission-tomography-study-of-the-serotonergic-system-in-relation-to-anxiety-in-depression
#18
Zafer Iscan, Gopalkumar Rakesh, Samantha Rossano, Jie Yang, Mengru Zhang, Jeffrey Miller, Gregory M Sullivan, Priya Sharma, Matthew McClure, Maria A Oquendo, J John Mann, Ramin V Parsey, Christine DeLorenzo
Symptoms of anxiety are highly comorbid with major depressive disorder (MDD) and are known to alter the course of the disease. To help elucidate the biological underpinnings of these prevalent disorders, we previously examined the relationship between components of anxiety (somatic, psychic and motoric) and serotonin 1A receptor (5-HT1A) binding in MDD and found that higher psychic and lower somatic anxiety was associated with greater 5-HT1A binding. In this work, we sought to examine the correlation between these anxiety symptom dimensions and 5-HTT binding...
August 12, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28810828/suitable-reference-gene-for-quantitative-real-time-pcr-analysis-of-gene-expression-in-gonadal-tissues-of-minnow-puntius-sophore-under-high-temperature-stress
#19
Arabinda Mahanty, Gopal Krishna Purohit, Sasmita Mohanty, Nihar Ranjan Nayak, Bimal Prasanna Mohanty
BACKGROUND: High ambient temperature is known to affect fish gonadal development and physiology in a variety of ways depending on the severity and duration of exposure; however, the underlying molecular mechanisms are poorly understood. Gonadal gene expression influence the gonadal development, physiology and the quality of egg/sperm produced in teleosts and the mechanistic understanding of spatio-temporal changes in the gonadal gene expression could be instrumental in controlling the fate of egg/sperm and the quality of seed produced...
August 15, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28810743/layer-by-layer-molecular-assemblies-for-dye-sensitized-pho-toelectrosynthesis-cells-prepared-by-atomic-layer-deposi-tion
#20
Degao Wang, Matthew V Sheridan, Bing Shan, Byron H Farnum, Seth L Marquard, Benjamin D Sherman, Michael S Eberhart, Animesh Nayak, Christopher Dares, Atanu Das, R Morris Bullock, Thomas J Meyer
In a Dye Sensitized Photoelectrosynthesis Cell (DSPEC) the relative orientation of the catalyst and chromophore plays an important role in determining the device efficiency. Here we introduce a new, robust atomic layer deposition (ALD) procedure for the preparation of molecular chromophore-catalyst assemblies on wide bandgap semiconductors. In this procedure, solution deposited, phosphonate derivatized metal complexes on metal oxide surfaces are treated with reactive metal reagents in the gas phase by ALD to form an outer metal ion bridging group which can bind a second phosphonate containing species from solution to establish a R1-PO2-O-M-O-PO2-R2 type surface assembly...
August 15, 2017: Journal of the American Chemical Society
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