Multifunctional silica nanoparticles for optical and magnetic resonance imaging.

abstract：:The physiological function of the GPI-anchored ectoenzyme aminopeptidase P (APP) is still elusive. Most researchers suppose that this enzyme inactivates biologically active peptides like bradykinin, neuropeptide tyrosine (NPY) and others (Vanhoof et al., 1995). We demonstrate by immunohistology with a specific antibod...

journal_title：Biological chemistry

authors： Lasch J,Moschner S,Sann H,Zellmer S,Koelsch R

更新日期：1998-06-01 00:00:00

abstract：:We have cloned from a chicken intestinal cDNA library Cmdr1, the first avian P-glycoprotein. Cmdr1 is 67% and 69% identical to proteins encoded by the human MDR1 and MDR2 genes, respectively. Functional expression of Cmdr1 in both mouse NIH 3T3 and yeast cells demonstrated that Cmdr1 represents the avian ortholog of h...

journal_title：Biological chemistry

authors： Edelmann HM,Duchek P,Rosenthal FE,Föger N,Glackin C,Kane SE,Kuchler K

更新日期：1999-02-01 00:00:00

abstract：:The multifunctional helper component proteinase (HC-Pro) of potyviruses contains an autoproteolytic function that, together with the protein 1 (P1) and NIa proteinase, processes the polyprotein into mature proteins. In this study, we analysed the autoproteolytic active domain of zucchini yellow mosaic virus (ZYMV) HC-...

journal_title：Biological chemistry

authors： Boonrod K,Füllgrabe MW,Krczal G,Wassenegger M

更新日期：2011-10-01 00:00:00

abstract：:Cancer cells are relatively resistant to endoplasmic reticulum (ER) stress-induced apoptosis. However, the underlying mechanisms remain largely unclear. We observed that the microRNAs miR-221/222 are associated with apoptosis regulation under ER stress in human hepatocellular carcinoma (HCC) cells. Induction of ER str...

journal_title：Biological chemistry

authors： Dai R,Li J,Liu Y,Yan D,Chen S,Duan C,Liu X,He T,Li H

更新日期：2010-07-01 00:00:00

abstract：:Transforming growth factor-β (TGFβ) signaling acts as suppressor and inducer of tumor progression during the early and late stages of cancer, respectively. Some miRNAs have shown a regulatory effect on TGFβ signaling and here, we have used a combination of bioinformatics and experimental tools to show that hsa-miR-559...

journal_title：Biological chemistry

authors： Abedini Bakhshmand E,Soltani BM

更新日期：2019-04-24 00:00:00

abstract：:Mammalian apolipoproteinB (apoB) RNA editing is a site-specific deamination reaction that mediates the C to U conversion responsible for apoB48 production in the mammalian small intestine. This process is not detected in chicken apoB RNA. Mammalian apoB RNA editing is mediated by a multicomponent enzyme complex that i...

journal_title：Biological chemistry

authors： Anant S,Yu H,Davidson NO

更新日期：1998-08-01 00:00:00

abstract：:The human copper exporters ATP7A and ATP7B contain domains common to all P-type ATPases as well as class-specific features such as six sequential heavy-metal binding domains (HMBD1-HMBD6) and a type-specific constellation of transmembrane helices. Despite the medical significance of ATP7A and ATP7B related to Menkes a...

journal_title：Biological chemistry

authors： Gourdon P,Sitsel O,Lykkegaard Karlsen J,Birk Møller L,Nissen P

更新日期：2012-04-01 00:00:00

abstract：:Here, we describe a novel member in the group of membrane-anchored chymotrypsin (S1)-like serine proteases, namely testis serine protease 1 (T-SP1), as it is principally expressed in testis tissue. The human T-SP1 gene encompasses 28.7 kb on the short arm of chromosome 8 and consists of seven exons. Rapid amplificatio...

journal_title：Biological chemistry

authors： Neth P,Profanter B,Geissler C,Nägler DK,Nerlich A,Sommerhoff CP,Jochum M

更新日期：2008-12-01 00:00:00

abstract：:Nitrosative stress results from an increase in reactive nitrogen species (RNS) within the cell. Though the RNS - nitric oxide (·NO) and peroxynitrite (ONOO-) - play pivotal physiological roles, at elevated concentrations, these moieties can be poisonous to both prokaryotic and eukaryotic cells alike due to their capac...

journal_title：Biological chemistry

authors： Tharmalingam S,Alhasawi A,Appanna VP,Lemire J,Appanna VD

更新日期：2017-10-26 00:00:00

abstract：:Eukaryotic organisms have evolved complex and robust cellular stress response pathways to ensure maintenance of proteostasis and survival during fluctuating environmental conditions. Highly conserved stress response pathways can be triggered and coordinated at the cell-autonomous and cell-nonautonomous level by proteo...

journal_title：Biological chemistry

authors： Jones LM,Chen Y,van Oosten-Hawle P

更新日期：2020-08-27 00:00:00

abstract：:The efficient execution of apoptotic cell death with the clearance of apoptotic debris by phagocytes is a key regulatory mechanism ensuring tissue homeostasis. Failure in this execution program contributes to the pathogenesis of many human diseases. In this review, we describe the current knowledge regarding the inter...

journal_title：Biological chemistry

authors： Weigert A,Jennewein C,Brüne B

更新日期：2009-05-01 00:00:00

abstract：:Extreme thermophiles produce unusually long polyamines, including the linear caldopentamine (Cdp) and the branched pentamine tetrakis(3-aminopropyl)-ammonium (Taa), with the latter containing a central quaternary ammonium moiety. Here we compare the interaction of these two pentamines with RNA by studying the heat den...

journal_title：Biological chemistry

authors： Hayrapetyan A,Grosjean H,Helm M

更新日期：2009-09-01 00:00:00

abstract：:Host T cell activation, a key step in obtaining adaptive immunity against pathogens, is initiated by the binding of the T cell receptor to a foreign antigenic peptide presented by the major histocompatibility complex on the surface of an antigen-presenting cell and, consequently, formation of an immunological synapse....

journal_title：Biological chemistry

authors： Beyersdorf N,Müller N

更新日期：2015-06-01 00:00:00

abstract：:To facilitate evolutionary and forensic studies of DNA polymorphisms on the Y chromosome, we devised a multiplex amplification procedure for short-tandem-repeat (STR) loci. Four tetranucleotide STR loci (DYS19, DYS390, DYS391, and DYS393) were simultaneously amplified with FAM-labeled primers and genotypes were determ...

journal_title：Biological chemistry

authors： Redd AJ,Clifford SL,Stoneking M

更新日期：1997-08-01 00:00:00

abstract：:A deletion mutant (V314) of the calcineurin A subunit was constructed using site-directed mutagenesis. Its phosphatase activity and function were then characterized. The V314 deletion significantly altered the phosphatase activity, which was more than ten times higher than that of wild-type calcineurin, the calcineuri...

journal_title：Biological chemistry

authors： Yan L,Wei Q

更新日期：1999-11-01 00:00:00

abstract：:The transcription of the fatty acid synthase (FAS) gene is regulated by the sterol status of the cell via cleavage of the sterol regulatory element-binding protein (SREBP). When human HepG2 hepatoma cells were cotransfected with an expression plasmid for mature SREBP-1a together with FAS promoter/reporter constructs s...

journal_title：Biological chemistry

authors： Wolf SS,Roder K,Sickinger S,Schweizer M

更新日期：2001-07-01 00:00:00

abstract：:Latent episomal genomes of Epstein-Barr virus, a human gammaherpesvirus, represent a suitable model system for studying replication and methylation of chromosomal DNA in mammals. We analyzed the methylation patterns of CpG dinucleotides in the latent origin of DNA replication of Epstein-Barr virus using automated fluo...

journal_title：Biological chemistry

authors： Salamon D,Takacs M,Myöhänen S,Marcsek Z,Berencsi G,Minarovits J

更新日期：2000-02-01 00:00:00

abstract：:The signal recognition particle (SRP), a ubiquitous cytoplasmic ribonucleoprotein particle, plays an essential role in promoting co-translational translocation of proteins into the endoplasmic reticulum. Here, we summarise recent progress made in the understanding of two essential SRP functions: the signal recognition...

journal_title：Biological chemistry

authors： Bui N,Strub K

更新日期：1999-02-01 00:00:00

abstract：:There is increasing evidence that apoptosis and necrosis represent only two of several possible ways for cells to die. These two types of demise can occur simultaneously in tissues or cell cultures exposed to the same stimulus, and often local metabolic conditions and the intensity of the same initial insult decide th...

journal_title：Biological chemistry

authors： Nicotera P,Leist M,Single B,Volbracht C

更新日期：1999-09-01 00:00:00

abstract：:Cytokinins are essential plant hormones that regulate numerous physiological processes. Recently, a protein was identified in mung bean (Vigna radiata) and characterized as a cytokinin-specific binding protein (VrCSBP). Fluorescence correlation spectroscopy was used to investigate the interaction between VrCSBP and it...

journal_title：Biological chemistry

authors： Zawadzki P,Slósarek G,Boryski J,Wojtaszek P

更新日期：2010-01-01 00:00:00

abstract：:Ammonia is a major player in the pathogenesis of hepatic encephalopathy (HE) and affects astrocyte function by triggering a self-amplifying cycle between osmotic and oxidative stress. We recently demonstrated that hypoosmotic astrocyte swelling rapidly stimulates nitric oxide (NO) production and increases intracellula...

journal_title：Biological chemistry

authors： Kruczek C,Görg B,Keitel V,Bidmon HJ,Schliess F,Häussinger D

更新日期：2011-12-01 00:00:00

abstract：:Two members of the nuclear receptor superfamily, EcR (ecdysteroid receptor protein) and Usp (Ultraspiracle), heterodimerize to form a functional receptor for the steroid hormone 20-hydroxyecdysone and thus enable it to coordinate morphogenetic events during insect metamorphosis. N-terminally His-tagged Usp was overexp...

journal_title：Biological chemistry

authors： Rymarczyk G,Grad I,Rusek A,Oświecimska-Rusin K,Niedziela-Majka A,Kochman M,Ozyhar A

更新日期：2003-01-01 00:00:00

abstract：:To exploit the B-lymphocyte antigen-CD20 binding capacity of the Ibritumomab tiuxetan (IBTN) monoclonal antibody (mAb) for imaging, the over-expression of B cells in non-Hodgkin's lymphoma (NHL) (a myeloproliferative disorder of the lymphatic system) was investigated. In the current investigation, we present the label...

journal_title：Biological chemistry

authors： Shah SQ,Khan AU,Khan MR

更新日期：2012-01-01 00:00:00

abstract：:Bauhinia ungulata factor Xa inhibitor (BuXI) inactivates factor Xa and LOPAP, a prothrombin activator proteinase isolated from the venom of Lonomia obliqua caterpillar bristles. The reactive site of the enzyme-inhibitor interaction was explored to design specific substrates for both enzymes. Methionine is crucial for ...

journal_title：Biological chemistry

authors： Andrade SA,Santomauro-Vaz EM,Lopes AR,Chudzinski-Tavassi AM,Juliano MA,Terra WR,Sampaio MU,Sampaio CA,Oliva ML

更新日期：2003-03-01 00:00:00

abstract：:The relationship between the structure and activity of meta- and para-hydroxylated monophenols was studied during their tyrosinase-catalysed hydroxylation and the rate-limiting steps of the reaction mechanism were identified. The para-hydroxylated substrates permit us to study the effect of a substituent (R) in the ca...

journal_title：Biological chemistry

authors： Fenoll LG,Rodríguez-López JN,Varón R,García-Ruiz PA,García-Cánovas F,Tudela J

更新日期：2000-04-01 00:00:00

abstract：:We have characterised a Drosophila P-element enhancer detector insertion F125, which is expressed in the embryonic head and CNS as well as in various third instar imaginal discs. In an attempt to identify the gene with the equivalent expression pattern, we have characterised an adjacent gene. It encodes two novel conc...

journal_title：Biological chemistry

authors： Zeidler MP,Mlodzik M

更新日期：1997-10-01 00:00:00

abstract：:We have investigated the methylation status of the repeat unit of the human ribosomal RNA genes in lung cancer. Using a Southern blot analysis approach we have determined that the non-transcribed region of these genes was generally heavily methylated, while the transcribed region was not methylated in either tumor or ...

journal_title：Biological chemistry

authors： Shiraishi M,Sekiguchi A,Chuu YH,Sekiya T

更新日期：1999-01-01 00:00:00

abstract：:This review deals with current concepts on the regulation and function of phospholipid asymmetry in biological membranes. This ubiquitous phenomenon is characterized by a distinctly different lipid composition between the inner and outer leaflet of the membrane bilayer. Transbilayer asymmetry is controlled by differen...

journal_title：Biological chemistry

authors： Bevers EM,Comfurius P,Dekkers DW,Harmsma M,Zwaal RF

更新日期：1998-08-01 00:00:00

abstract：:Oxidative stress has for a long time been associated with cell death, especially classical necrosis, however, its role in other cell death pathways is less clear. Here, we evaluated in a comparative way, the effect of four different reactive oxygen species (ROS) scavengers, N-acetyl-L-cysteine (NAC), α-tocopherol and ...

journal_title：Biological chemistry

authors： Kavčič N,Pegan K,Vandenabeele P,Turk B

更新日期：2019-01-28 00:00:00

abstract：:In mammals, betaine of the mitochondrial matrix is used in the cytosol by betaine-homocysteine S-methyltransferase for methionine synthesis. The resulting dimethylglycine is shuttled back into the mitochondrial matrix for further degradation. Nanospray tandem mass spectrometry and N-terminal amino acid sequencing of m...

journal_title：Biological chemistry

authors： Sandu C,Nick P,Hess D,Schiltz E,Garrow TA,Brandsch R

更新日期：2000-07-01 00:00:00