Decrease in telomerase activity in U-87MG human glioblastomas after treatment with an antagonist of growth hormone-releasing hormone.

abstract：:The growth of 3T3 and SV101 3T3 cells in a lipid-depleted medium is enhanced by the addition of biotin or some fatty acids. The extent of enhancement depends on the fatty acid(s) supplied. The presence of linoleate is unique, since it induces a morphological alteration in 3T3 cells resulting in a cell similar to an SV...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Horwitz AF,Hatten ME,Burger MM

更新日期：1974-08-01 00:00:00

abstract：:Cleavage of precursor proteins occurs during assembly of numerous viruses. Seven bacteriophage T4 head-related proteins areknown to be cleaved during morphogenesis. Sequences surrounding the cleavage sites in T4 head precursors P23 and IPIII are reported here. We previously determined the sequences of precursor and pr...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Isobe T,Black LW,Tsugita A

更新日期：1976-11-01 00:00:00

abstract：:Energetics of resting and evoked fMRI signals were related to localized ensemble firing rates (nu) measured by electrophysiology in rats. Two different unstimulated, or baseline, states were established by anesthesia. Halothane and alpha-chloralose established baseline states of high and low energy, respectively, in w...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Maandag NJ,Coman D,Sanganahalli BG,Herman P,Smith AJ,Blumenfeld H,Shulman RG,Hyder F

更新日期：2007-12-18 00:00:00

abstract：:The beta 2-adrenergic receptor (beta 2AR) can be constitutively activated by mutations in the third intracellular loop. Whereas the wild-type receptor exists predominantly in an inactive conformation (R) in the absence of agonist, the mutant receptor appears to spontaneously adopt an active conformation (R*). We now d...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Pei G,Samama P,Lohse M,Wang M,Codina J,Lefkowitz RJ

更新日期：1994-03-29 00:00:00

abstract：:The configurations of the hydrocarbon chains in micelles are severely constrained by the space-filling requirements of the chain segments, by the continuity of the chains, and by the micellar geometry. A statistical theory that takes full account of these constraints is developed by using a lattice model. The chain en...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Dill KA,Flory PJ

更新日期：1981-02-01 00:00:00

abstract：:Separation of cells is a critical process for studying cell properties, disease diagnostics, and therapeutics. Cell sorting by acoustic waves offers a means to separate cells on the basis of their size and physical properties in a label-free, contactless, and biocompatible manner. The separation sensitivity and effici...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Ding X,Peng Z,Lin SC,Geri M,Li S,Li P,Chen Y,Dao M,Suresh S,Huang TJ

更新日期：2014-09-09 00:00:00

abstract：:Factors that elevate amyloid-beta (Abeta) peptide levels are associated with an increased risk for Alzheimer's disease. Insulysin has been identified as one of several proteases potentially involved in Abeta degradation based on its hydrolysis of Abeta peptides in vitro. In this study, in vivo levels of brain Abeta40 ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Miller BC,Eckman EA,Sambamurti K,Dobbs N,Chow KM,Eckman CB,Hersh LB,Thiele DL

更新日期：2003-05-13 00:00:00

abstract：:The demonstration of enzymatic capabilities of certain RNAs, in addition to their well-known template properties, has led to the recognition that RNAs are the only biological macromolecules that can function both as genotype and phenotype, hence raising the possibility of Darwinian selection and precellular evolution ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Diener TO

更新日期：1989-12-01 00:00:00

abstract：:Recent experiments have shown that spreading epithelial sheets exhibit a long-range coordination of motility forces that leads to a buildup of tension in the tissue, which may enhance cell division and the speed of wound healing. Furthermore, the edges of these epithelial sheets commonly show finger-like protrusions w...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Basan M,Elgeti J,Hannezo E,Rappel WJ,Levine H

更新日期：2013-02-12 00:00:00

abstract：:Green fluorescent protein (GFP) is widely used as a reporter gene in both prokaryotes and eukaryotes. However, the fluorescence levels of wild-type GFP (wtGFP) are not bright enough for fluorescence-activated cell sorting or flow cytometry. Several GFP variants were generated that are brighter or have altered excitati...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Anderson MT,Tjioe IM,Lorincz MC,Parks DR,Herzenberg LA,Nolan GP,Herzenberg LA

更新日期：1996-08-06 00:00:00

abstract：:Resistance to thyroid hormone (RTH) is most often due to point mutations in the beta-isoform of the thyroid hormone (TH) receptor (TR-beta). The majority of mutations involve the ligand-binding domain, where they block TH binding and receptor function on both stimulatory and inhibitory TH response elements. In contras...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Machado DS,Sabet A,Santiago LA,Sidhaye AR,Chiamolera MI,Ortiga-Carvalho TM,Wondisford FE

更新日期：2009-06-09 00:00:00

abstract：:Chloroplast DNA of the protozoan flagellate, Euglena gracilis, exists as circular molecules, 40 mum in contour length, as shown by electron microscopy and buoyant density analyses. ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Manning JE,Wolstenholme DR,Ryan RS,Hunter JA,Richards OC

更新日期：1971-06-01 00:00:00

abstract：:Superoxide dismutases (SODs; superoxide: superoxide oxidoreductase, EC 1.15.1.1) play a key role in protection against oxygen radicals, and SOD gene expression is highly induced during environmental stress. To determine the conditions of SOD induction, the promoter of the cytosolic copper/zinc SOD (Cu/ZnSODcyt) gene w...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Hérouart D,Van Montagu M,Inzé D

更新日期：1993-04-01 00:00:00

abstract：:Mutations in the human parkin gene cause autosomal recessive juvenile parkinsonism, a heritable form of Parkinson's disease (PD). To determine whether mutations in the mouse parkin gene (Park2) also result in a parkinsonian phenotype, we generated mice with a targeted deletion of parkin exon 2. Using an extensive beha...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Perez FA,Palmiter RD

更新日期：2005-02-08 00:00:00

abstract：:Type VI secretion systems (T6SSs) are multiprotein complexes best studied in Gram-negative pathogens where they have been shown to inhibit or kill prokaryotic or eukaryotic cells and are often important for virulence. We recently showed that T6SS loci are also widespread in symbiotic human gut bacteria of the order Ba...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Chatzidaki-Livanis M,Geva-Zatorsky N,Comstock LE

更新日期：2016-03-29 00:00:00

abstract：:Inflammatory destruction of insulin-producing beta cells in the pancreatic islets is the hallmark of insulin-dependent diabetes mellitus, a spontaneous autoimmune disease of non-obese diabetic mice resembling human juvenile (type I) diabetes. Histochemical analysis of diabetic pancreata revealed that mononuclear cells...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Weiss L,Slavin S,Reich S,Cohen P,Shuster S,Stern R,Kaganovsky E,Okon E,Rubinstein AM,Naor D

更新日期：2000-01-04 00:00:00

abstract：:Targeted disruption of the pp60(src) (Src) gene has implicated this tyrosine kinase in osteoclast-mediated bone resorption and as a therapeutic target for the treatment of osteoporosis and other bone-related diseases. Herein we describe the discovery of a nonpeptide inhibitor (AP22408) of Src that demonstrates in vivo...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Shakespeare W,Yang M,Bohacek R,Cerasoli F,Stebbins K,Sundaramoorthi R,Azimioara M,Vu C,Pradeepan S,Metcalf C 3rd,Haraldson C,Merry T,Dalgarno D,Narula S,Hatada M,Lu X,van Schravendijk MR,Adams S,Violette S,Smith J,

更新日期：2000-08-15 00:00:00

abstract：:In Paramecium tetraurelia, cyclic nucleotides are important physiological second messengers that could regulate dynein mechanochemistry by phosphorylation. A 29-kDa polypeptide that is phosphorylated in a cAMP- and Ca(2+)-sensitive manner in permeabilized cells and isolated axonemes is the only significant phosphoryla...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Hamasaki T,Barkalow K,Richmond J,Satir P

更新日期：1991-09-15 00:00:00

abstract：:Split GFPs have been widely applied for monitoring protein-protein interactions by expressing GFPs as two or more constituent parts linked to separate proteins that only fluoresce on complementing with one another. Although this complementation is typically irreversible, it has been shown previously that light acceler...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Lin CY,Both J,Do K,Boxer SG

更新日期：2017-03-14 00:00:00

abstract：:REPRESSOR OF SILENCING 1 (ROS1) is a DNA demethylation enzyme that was previously identified during a genetic screen for the silencing of both RD29A-LUC and 35S-NPTII transgenes on a T-DNA construct. Here we performed a genetic screen to identify additional mutants in which the 35S-NPTII transgene is silenced. We iden...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Li X,Qian W,Zhao Y,Wang C,Shen J,Zhu JK,Gong Z

更新日期：2012-07-10 00:00:00

abstract：:Each person's genome sequence has thousands of missense variants. Practical interpretation of their functional significance must rely on computational inferences in the absence of exhaustive experimental measurements. Here we analyzed the efficacy of these inferences in 33 de novo missense mutations revealed by sequen...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Miosge LA,Field MA,Sontani Y,Cho V,Johnson S,Palkova A,Balakishnan B,Liang R,Zhang Y,Lyon S,Beutler B,Whittle B,Bertram EM,Enders A,Goodnow CC,Andrews TD

更新日期：2015-09-15 00:00:00

abstract：:With the collapse of fisheries in many parts of the world causing widespread economic harm, attention is focused on a possible cause and remedy of fishery collapse. Economic theory for managing a renewable resource, such as a fishery, leads to an ecologically unstable equilibrium as difficult to maintain as balancing ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Roughgarden J,Smith F

更新日期：1996-05-14 00:00:00

abstract：:The cheA locus of Escherichia coli, which is required for chemotactic behavior, encodes two polypeptide products designated p[cheA]L and p[cheA]S. The mode of synthesis of these two proteins was investigated by transferring various missense and nonsense mutations to a lambda transducing phage and observing the mutant ...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Smith RA,Parkinson JS

更新日期：1980-09-01 00:00:00

abstract：:UT-1 cells are a clone of Chinese hamster ovary cells that were selected to grow in the presence of compactin, a competitive inhibitor of 3-hydroxy-3-methylglutaryl-coenzyme A reductase [mevalonate: NADP+ oxidoreductase (CoA-acylating), EC 1.1.1.34]. These cells have 100- to 1,000-fold more immunoprecipitable reductas...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Faust JR,Luskey KL,Chin DJ,Goldstein JL,Brown MS

更新日期：1982-09-01 00:00:00

abstract：:Quiescent BALB/c 3T3 cells exposed briefly to a platelet-derived growth factor (PDGF) become "competent" to replicate their DNA but do not "progress" into S phase unless incubated with growth factors contained in platelet-poor plasma. Plasma from hypophysectomized rats is deficient in progression activity; it does not...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Stiles CD,Capone GT,Scher CD,Antoniades HN,Van Wyk JJ,Pledger WJ

更新日期：1979-03-01 00:00:00

abstract：:Most current gene transfer methods function satisfactorily in specialized systems involving established cell lines but are often not applicable with nonadherent, primary hematopoietic cells, which are notoriously difficult to transfect. To approach this problem, we have investigated an alternative method of gene trans...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Zenke M,Steinlein P,Wagner E,Cotten M,Beug H,Birnstiel ML

更新日期：1990-05-01 00:00:00

abstract：:Kdo (3-deoxy-d-manno-oct-2-ulosonic acid) is an eight-carbon sugar mostly confined to Gram-negative bacteria. It is often involved in attaching surface polysaccharides to their lipid anchors. α-Kdo provides a bridge between lipid A and the core oligosaccharide in all bacterial LPSs, whereas an oligosaccharide of β-Kdo...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Ovchinnikova OG,Mallette E,Koizumi A,Lowary TL,Kimber MS,Whitfield C

更新日期：2016-05-31 00:00:00

abstract：:Focal cerebral ischemia and traumatic brain injury induce an escalating amount of cell death because of harmful mediators diffusing from the original lesion site. Evidence suggests that healthy cells surrounding these lesions attempt to protect themselves by producing endocannabinoids (eCBs) and activating cannabinoid...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Witting A,Chen L,Cudaback E,Straiker A,Walter L,Rickman B,Möller T,Brosnan C,Stella N

更新日期：2006-04-18 00:00:00

abstract：:Endoplasmic reticulum (ER) stress sensors use a related luminal domain to monitor the unfolded protein load and convey the signal to downstream effectors, signaling an unfolded protein response (UPR) that maintains compartment-specific protein folding homeostasis. Surprisingly, perturbation of cellular lipid compositi...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Volmer R,van der Ploeg K,Ron D

更新日期：2013-03-19 00:00:00

abstract：:The inhibitory neurotransmitter gamma-aminobutyric acid (GABA) is involved in the generation of various brain rhythmic activities that can be modulated by benzodiazepines. Here, we assessed the contribution of alpha(2)GABA type A (GABA(A)) receptors to the effects of benzodiazepines on sleep and waking oscillatory pat...

journal_title：Proceedings of the National Academy of Sciences of the United States of America

authors： Kopp C,Rudolph U,Löw K,Tobler I

更新日期：2004-03-09 00:00:00