Intrasomatic injection of radioactive precursors for studying transmitter synthesis in identified neurons of Aplysia californica.

abstract：:Staphylococcus aureus is a major cause of community-acquired and nosocomial infections including the life-threatening conditions endocarditis, necrotizing pneumonia, necrotizing fasciitis, and septicemia. Toll-like receptor (TLR)-2, a membrane-bound microbial sensor, detects staphylococcal components, but macrophages ...

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

authors： Hruz P,Zinkernagel AS,Jenikova G,Botwin GJ,Hugot JP,Karin M,Nizet V,Eckmann L

更新日期：2009-08-04 00:00:00

abstract：:Rat superior cervical sympathetic ganglion was used to begin studying the regulation of molecular components of the synapse. Ganglionic postsynaptic densities (PSDs)exhibited a thin, disc-shaped profile electron microscopically, comparable to that described for brain. Moreover, the presumptive ganglionic PSD protein (...

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

authors： Wu K,Black IB

更新日期：1987-12-01 00:00:00

abstract：:Unlike parasitic protist groups that are defined by the absence of mitochondria, the Pelobiontida is composed mostly of free-living species. Because of the presence of ultrastructural and cellular features that set them apart from all other eukaryotic organisms, it has been suggested that pelobionts are primitively am...

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

authors： Stiller JW,Duffield EC,Hall BD

更新日期：1998-09-29 00:00:00

abstract：:Magnetic field fluctuations arising from fundamental spins are ubiquitous in nanoscale biology, and are a rich source of information about the processes that generate them. However, the ability to detect the few spins involved without averaging over large ensembles has remained elusive. Here, we demonstrate the detect...

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

authors： Kaufmann S,Simpson DA,Hall LT,Perunicic V,Senn P,Steinert S,McGuinness LP,Johnson BC,Ohshima T,Caruso F,Wrachtrup J,Scholten RE,Mulvaney P,Hollenberg L

更新日期：2013-07-02 00:00:00

abstract：:Kampo formulations are traditional herbal medications used in China and Japan for many centuries to treat diarrheal diseases such as cholera. Our studies were undertaken to identify and verify by chemical synthesis the active components that inhibited cholera toxin (CT), the virulence factor secreted by Vibrio cholera...

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

authors： Oi H,Matsuura D,Miyake M,Ueno M,Takai I,Yamamoto T,Kubo M,Moss J,Noda M

更新日期：2002-03-05 00:00:00

abstract：:Memory CD8 T cells provide durable protection against diverse intracellular pathogens and can be broadly segregated into distinct circulating and tissue-resident populations. Paradigmatic studies have demonstrated that circulating memory cells can be further divided into effector memory (Tem) and central memory (Tcm) ...

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

authors： Milner JJ,Nguyen H,Omilusik K,Reina-Campos M,Tsai M,Toma C,Delpoux A,Boland BS,Hedrick SM,Chang JT,Goldrath AW

更新日期：2020-10-13 00:00:00

abstract：:The plant hormone abscisic acid (ABA) is produced in response to abiotic stresses and mediates stomatal closure in response to drought via recently identified ABA receptors (pyrabactin resistance/regulatory component of ABA receptor; PYR/RCAR). SLAC1 encodes a central guard cell S-type anion channel that mediates ABA-...

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

authors： Brandt B,Brodsky DE,Xue S,Negi J,Iba K,Kangasjärvi J,Ghassemian M,Stephan AB,Hu H,Schroeder JI

更新日期：2012-06-26 00:00:00

abstract：:The free radicals nitric oxide and superoxide anion react to form peroxynitrite (ONOO-), a highly toxic oxidant species. In vivo formation of ONOO- has been demonstrated in shock and inflammation. Herein we provide evidence that cytotoxicity in cells exposed to ONOO- is mediated by DNA strand breakage and the subseque...

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

authors： Szabó C,Zingarelli B,O'Connor M,Salzman AL

更新日期：1996-03-05 00:00:00

abstract：:p38 mitogen-activated protein kinase (MAPK) regulates cytokines in arthritis and is, in turn, regulated by MAPK kinase (MKK) 3 and MKK6. To modulate p38 function but potentially minimize toxicity, we evaluated the utility of targeting MKK3 by using MKK3(-/-) mice. These studies showed that TNF-alpha increased phosphor...

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

authors： Inoue T,Boyle DL,Corr M,Hammaker D,Davis RJ,Flavell RA,Firestein GS

更新日期：2006-04-04 00:00:00

abstract：:The immunoglobulin heavy-chain variable region (VH) locus in a phylogenetically primitive teleost (Elops saurus) has been characterized by a strategy that relied initially on cross-hybridization between genomic VH segments and a murine VH probe. Using a homologous (Elops) VH probe and DNA sequencing, this gene family ...

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

authors： Amemiya CT,Litman GW

更新日期：1990-01-01 00:00:00

abstract：:The mechanisms underlying analgesia related to social touch are not clear. While recent research highlights the role of the empathy of the observer to pain relief in the target, the contribution of social interaction to analgesia is unknown. The current study examines brain-to-brain coupling during pain with interpers...

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

authors： Goldstein P,Weissman-Fogel I,Dumas G,Shamay-Tsoory SG

更新日期：2018-03-13 00:00:00

abstract：:Genes that are unexpressed in somatic cells have been activated by injecting cultured cell nuclei of the frog Xenopus laevis into oocytes of the newt Pleurodeles waltlii. The genes that were activated are normally expressed in oocytes but not in cultured cells. Conversely, genes that are normally expressed in cultured...

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

authors： De Robertis EM,Gurdon JB

更新日期：1977-06-01 00:00:00

abstract：:The need to assess subtle, potentially exploitable changes in serial structure is paramount in the analysis of financial data. Herein, we demonstrate the utility of approximate entropy (ApEn), a model-independent measure of sequential irregularity, toward this goal, by several distinct applications. We consider both e...

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

authors： Pincus S,Kalman RE

更新日期：2004-09-21 00:00:00

abstract：:Ammonium sulfate fractionation of crude extracts of E. coli yields a soluble enzyme fraction (about 25-fold purification) that catalyzes the conversion of phiX174 single-stranded DNA to duplex DNA. The reaction is rifampicin-resistant, requires single-stranded DNA, Mg++, deoxynucleoside triphosphates, and ATP, and is ...

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

authors： Schuster H,Mikolajczyk M,Rohrschneider J,Geschke B

更新日期：1975-10-01 00:00:00

abstract：:The history of the development of the Chandra X-Ray Observatory is reviewed from a personal perspective. This review is necessarily biased and limited by space because it attempts to cover a time span approaching five decades. ...

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

authors： Weisskopf MC

更新日期：2010-04-20 00:00:00

abstract：:By commandeering cellular translation initiation factors, or destroying those dispensable for viral mRNA translation, viruses often suppress host protein synthesis. In contrast, cellular protein synthesis proceeds in human cytomegalovirus (HCMV)-infected cells, forcing viral and cellular mRNAs to compete for limiting ...

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

authors： McKinney C,Perez C,Mohr I

更新日期：2012-04-10 00:00:00

abstract：:Bacteriophage 434 encodes a repressor that, like bacteriophage lambda repressor, both activates and represses transcription. As in the lambda chromosome, a region of the 434 chromosome, called the right operator, contains three repressor binding sites (OR1, OR2, and OR3) that mediate these effects on two adjacent prom...

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

authors： Bushman FD,Ptashne M

更新日期：1986-12-01 00:00:00

abstract：:Telomeres are specialized structures located at the ends of linear eukaryotic chromosomes that ensure their complete replication and protect them from fusion and degradation. We report here the characterization of the telomeres of the nematode Caenorhabditis elegans. We show that the chromosomes terminate in 4-9 kb of...

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

authors： Wicky C,Villeneuve AM,Lauper N,Codourey L,Tobler H,Müller F

更新日期：1996-08-20 00:00:00

abstract：:Leukosialin (also known as Ly48, CD43, and sialophorin) is a major cell surface sialoglycoprotein found on a variety of hematopoietically derived cells. The precise function of this molecule is poorly understood but it has been implicated in cell proliferation and intercellular adhesion. We developed a transgenic mous...

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

authors： Dragone LL,Barth RK,Sitar KL,Disbrow GL,Frelinger JG

更新日期：1995-01-17 00:00:00

abstract：:The nucleotide and predicted amino acid sequences of two variant cDNAs [rat brain thyroid hormone receptor (rTR alpha) vI and vII], isolated from a rat brain cDNA library by using the Pst I fragment of v-erbA, showed virtual identity with the rat brain thyroid hormone receptor (rTR alpha) [Thompson, C. C., Weinberger,...

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

authors： Mitsuhashi T,Tennyson GE,Nikodem VM

更新日期：1988-08-01 00:00:00

abstract：:To assess the effect of transforming growth factor beta 1 on the skin in vivo, we have targeted its expression to the epidermis of transgenic mice. To ensure that active TGF-beta 1 was expressed, we used a porcine TGF-beta 1 cDNA with mutations of Cys-223-->Ser and Cys-225-->Ser, which allow constitutive activation. M...

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

authors： Sellheyer K,Bickenbach JR,Rothnagel JA,Bundman D,Longley MA,Krieg T,Roche NS,Roberts AB,Roop DR

更新日期：1993-06-01 00:00:00

abstract：:The nusB5 mutant of Escherichia coli was originally selected for reduced ability to support the antitermination of transcription that is mediated by the gene N product of bacteriophage lambda. By analyzing pulse-labeled RNA with an RNA.DNA filter hybridization technique, we have shown that, in the nusB5 mutant, the ra...

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

authors： Sharrock RA,Gourse RL,Nomura M

更新日期：1985-08-01 00:00:00

abstract：:We have studied androgen binding characteristics of cells for androgen insensitivity from an obligate heterozygote, who is the mother of three male pseudohermaphrodites with dihydrotestosterone (17beta-hydroxy-5alpha-androstan-3-one) receptor deficiency. Specific dihydrotestosterone binding by skin fibroblasts from he...

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

authors： Meyer WJ 3rd,Migeon BR,Migeon CJ

更新日期：1975-04-01 00:00:00

abstract：:Escherichia coli lipopolysaccharide (LPS)-induced nitrate biosynthesis was studied in LPS-sensitive C3H/He and LPS-resistant C3H/HeJ mice. Intraperitoneal injection of 15 micrograms of LPS led to a temporary 5- to 6-fold increase in blood nitrate concentration in the C3H/He strain. Levels of nitrate excreted in the ur...

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

authors： Stuehr DJ,Marletta MA

更新日期：1985-11-01 00:00:00

abstract：:The functions of neurotransmitters in fetal development are poorly understood. Genetic observations have suggested a role for the inhibitory amino acid neurotransmitter gamma-aminobutyric acid (GABA) in the normal development of the mouse palate. Mice homozygous for mutations in the beta-3 GABAA receptor subunit devel...

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

authors： Condie BG,Bain G,Gottlieb DI,Capecchi MR

更新日期：1997-10-14 00:00:00

abstract：:RNA interference (RNAi) is a widely used method for analysis of gene function in tissue culture cells. However, to date there has been no reliable method for testing the specificity of any particular RNAi experiment. The ideal experiment is to rescue the phenotype by expression of the target gene in a form refractory ...

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

authors： Kittler R,Pelletier L,Ma C,Poser I,Fischer S,Hyman AA,Buchholz F

更新日期：2005-02-15 00:00:00

abstract：:The crystal structure of the complex between the heme- and FMN-binding domains of bacterial cytochrome P450BM-3, a prototype for the complex between eukaryotic microsomal P450s and P450 reductase, has been determined at 2.03 A resolution. The flavodoxin-like flavin domain is positioned at the proximal face of the heme...

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

authors： Sevrioukova IF,Li H,Zhang H,Peterson JA,Poulos TL

更新日期：1999-03-02 00:00:00

abstract：:Aged rats, displaying impairments in spatial learning and memory associated with marked cellular atrophy of forebrain cholinergic neurons, received intracerebroventricular infusions of one of the four neurotrophins nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), neurotrophin 3 (NT-3), or neurotrop...

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

authors： Fischer W,Sirevaag A,Wiegand SJ,Lindsay RM,Björklund A

更新日期：1994-08-30 00:00:00

abstract：:The reversible association of alpha and beta gamma subunits of GTP-binding proteins is important for signal transmission from a variety of cell-surface receptors to intracellular effectors. Previous work showed that 1,6-bis(maleimido)hexane, which crosslinks cysteine residues, crosslinks alpha o and alpha i-1 to beta ...

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

authors： Thomas TC,Schmidt CJ,Neer EJ

更新日期：1993-11-01 00:00:00

abstract：:We performed combinatorial peptide library screening in vivo on a novel human prostate cancer xenograft that is androgen-independent and induces a robust osteoblastic reaction in bonelike matrix and soft tissue. We found two peptides, PKRGFQD and SNTRVAP, which were enriched in the tumors, targeted the cell surface of...

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

authors： Mandelin J,Cardó-Vila M,Driessen WH,Mathew P,Navone NM,Lin SH,Logothetis CJ,Rietz AC,Dobroff AS,Proneth B,Sidman RL,Pasqualini R,Arap W

更新日期：2015-03-24 00:00:00