In vitro differentiation of a mouse neuroblastoma.

abstract：:Human T-cell leukemia virus type I (HTLV-I) is a causative agent of adult T-cell leukemia (ATL). To elucidate the role of HTLV-I in leukemogenesis, we examined the biological activity of a defective HTLV-I provirus with the env-pX 3' long terminal repeat region cloned from leukemic cells of an ATL patient. Transfectio...

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

authors： Tanaka A,Takahashi C,Yamaoka S,Nosaka T,Maki M,Hatanaka M

更新日期：1990-02-01 00:00:00

abstract：:Indoor residual spraying (IRS) is used to control visceral leishmaniasis (VL) in India, but it is poorly quality assured. Quality assurance was performed in eight VL endemic districts in Bihar State, India, in 2014. Residual dichlorodiphenyltrichloroethane (DDT) was sampled from walls using Bostik tape discs, and DDT ...

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

authors： Coleman M,Foster GM,Deb R,Pratap Singh R,Ismail HM,Shivam P,Ghosh AK,Dunkley S,Kumar V,Coleman M,Hemingway J,Paine MJ,Das P

更新日期：2015-07-14 00:00:00

abstract：:The T helper type 2 (Th2) cytokine genes Il4, Il5, and Il13 are contained within a 140-kb region of mouse chromosome 11 and their expression is controlled by a locus control region (LCR) embedded within this locus. The LCR is composed of a number of DNase I-hypersensitive sites (HSs), which are believed to encompass t...

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

authors： Williams A,Lee GR,Spilianakis CG,Hwang SS,Eisenbarth SC,Flavell RA

更新日期：2013-04-23 00:00:00

abstract：:In 1000 primary gastric carcinomas, 70 (7.0%) contained Epstein-Barr virus (EBV) genomic sequences detected by PCR and Southern blots. The positive tumors comprised 8 of 9 (89%) undifferentiated lymphoepithelioma-like carcinomas, 27 of 476 (5.7%) poorly differentiated adenocarcinomas, and 35 of 515 (6.8%) moderately t...

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

authors： Imai S,Koizumi S,Sugiura M,Tokunaga M,Uemura Y,Yamamoto N,Tanaka S,Sato E,Osato T

更新日期：1994-09-13 00:00:00

abstract：:Intermolecular energy transfer between appropriately chosen pairs of dyes can be used to induce or enhance banding patterns in human metaphase chromosomes. Energy transfer, calibrated by fluorometric studies on soluble dye.DNA complexes, can also be detected by photometric measurements on cytological preparations of m...

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

authors： Sahar E,Latt SA

更新日期：1978-11-01 00:00:00

abstract：:Aberrant promoter hypermethylation is frequently observed in cancer. The potential for this mechanism to contribute to tumor development depends on whether the genes affected are repressed because of their methylation. Many aberrantly methylated genes play important roles in development and are bivalently marked in ES...

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

authors： Sproul D,Nestor C,Culley J,Dickson JH,Dixon JM,Harrison DJ,Meehan RR,Sims AH,Ramsahoye BH

更新日期：2011-03-15 00:00:00

abstract：:A series of monoclonal antibodies was used to define three discrete stages of human intrathymic T-cell differentiation. The earliest stage was confined to <10% of thymocytes, which were.reactive with both OKT9 and OKT10. Subsequently, approximately 70% of human thymocytes acquired a thymocyte-restricted antigen, OKT6,...

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

authors： Reinherz EL,Kung PC,Goldstein G,Levey RH,Schlossman SF

更新日期：1980-03-01 00:00:00

abstract：:Chromophore-assisted light inactivation (CALI) offers the only method capable of modulating specific protein activities in localized regions and at particular times. Here, we generalize CALI so that it can be applied to a wider range of tasks. Specifically, we show that CALI can work with a genetically inserted epitop...

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

authors： Surrey T,Elowitz MB,Wolf PE,Yang F,Nédélec F,Shokat K,Leibler S

更新日期：1998-04-14 00:00:00

abstract：:Multiple paleoclimate proxies are required for robust assessment of past hydroclimatic conditions. Currently, estimates of drought variability over the past several thousand years are based largely on tree-ring records. We produced a 1,500-y record of winter precipitation in the Pacific Northwest using a physical mode...

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

authors： Steinman BA,Abbott MB,Mann ME,Stansell ND,Finney BP

更新日期：2012-07-17 00:00:00

abstract：:Beneficial mutations are the driving force of adaptive evolution. In asexual populations, the identification of beneficial alleles is confounded by the presence of genetically linked hitchhiker mutations. Parallel evolution experiments enable the recognition of common targets of selection; yet these targets are inhere...

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

authors： Buskirk SW,Peace RE,Lang GI

更新日期：2017-08-01 00:00:00

abstract：:Through use of a synthetic oligonucleotide probe, human insulin-like growth factor I (IGF-I) cDNA clones were isolated from a liver library. Two types of cDNAs were defined by restriction enzyme analysis and DNA sequencing. Both encode IGF-I precursors of either 195 or 153 amino acids. The two predicted protein precur...

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

authors： Rotwein P

更新日期：1986-01-01 00:00:00

abstract：:Rabbit articular chondrocytes synthesize type II collagen [3alpha(1)(II)] in vivo and type I collagen [2alpha(1)(I).alpha(2)] in monolayer cultures. In suspension culture the nature of phenotype depends on extracellular Ca(2+). The relationship of Ca(2+) and 3':5'-cyclic AMP (cAMP) in regulation of collagen synthesis ...

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

authors： Deshmukh K,Sawyer BD

更新日期：1977-09-01 00:00:00

abstract：:Chromosomal instability (CIN) is a defining characteristic of most human cancers. Mutation of CIN genes increases the probability that whole chromosomes or large fractions of chromosomes are gained or lost during cell division. The consequence of CIN is an imbalance in the number of chromosomes per cell (aneuploidy) a...

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

authors： Nowak MA,Komarova NL,Sengupta A,Jallepalli PV,Shih IeM,Vogelstein B,Lengauer C

更新日期：2002-12-10 00:00:00

abstract：:Cytosine methylation is an epigenetic mark that promotes gene silencing and plays important roles in development and genome defense against transposons. Methylation patterns are established and maintained by DNA methyltransferases that catalyze transfer of a methyl group from S-adenosyl-L-methionine to cytosine bases ...

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

authors： Morales-Ruiz T,Ortega-Galisteo AP,Ponferrada-Marín MI,Martínez-Macías MI,Ariza RR,Roldán-Arjona T

更新日期：2006-05-02 00:00:00

abstract：:Causes of late Quaternary extinctions of large mammals ("megafauna") continue to be debated, especially for continental losses, because spatial and temporal patterns of extinction are poorly known. Accurate latest appearance dates (LADs) for such taxa are critical for interpreting the process of extinction. The extinc...

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

authors： Haile J,Froese DG,Macphee RD,Roberts RG,Arnold LJ,Reyes AV,Rasmussen M,Nielsen R,Brook BW,Robinson S,Demuro M,Gilbert MT,Munch K,Austin JJ,Cooper A,Barnes I,Möller P,Willerslev E

更新日期：2009-12-29 00:00:00

abstract：:The chemotherapeutic drug Taxol is known to interact within a specific site on beta-tubulin. Although the general location of the site has been defined by photoaffinity labeling and electron crystallography, the original data were insufficient to make an absolute determination of the bound conformation. We have now co...

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

authors： Snyder JP,Nettles JH,Cornett B,Downing KH,Nogales E

更新日期：2001-04-24 00:00:00

abstract：:Homozygous lymphoblastoid cell lines representing Dw subtypes of the DR2 serotype were studied for structural polymorphism at DR beta. These subtypes included Dw2, Dw12, and non-Dw2/non-Dw12. Analysis by two-dimensional gel electrophoresis showed that two DR beta genes were expressed in each cell line studied. One of ...

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

authors： Lee BS,Rust NA,McMichael AJ,McDevitt HO

更新日期：1987-07-01 00:00:00

abstract：:The enzyme tryptophan 2,3-dioxygenase [EC 1.13.11.11; L-tryptophan:oxygen 2,3-oxidoreductase (decyclizing)] first appears in the livers of young rats around the 15th postnatal day, and increases to the adult level by the 22nd day. Studies have shown that the appearance and subsequent development of the enzyme activity...

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

authors： Killewich LA,Feigelson P

更新日期：1977-12-01 00:00:00

abstract：:The Hawaiian honeycreepers (Drepanidae) represent a superb illustration of evolutionary radiation, with a single colonization event giving rise to 19 extant and at least 10 extinct species [Curnutt, J. & Pimm, S. (2001) Stud. Avian Biol. 22, 15-30]. They also represent a dramatic example of anthropogenic extinction. C...

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

authors： Benning TL,LaPointe D,Atkinson CT,Vitousek PM

更新日期：2002-10-29 00:00:00

abstract：:Ig class-switch recombination (CSR) is a region-specific process that exchanges the constant Ig heavy-chain region and thus modifies an antibody's effector function. DNA lesions in switch (S) regions are induced by activation-induced cytidine deaminase (AID) and uracil-DNA glycosylase 2 (UNG2), subsequently processed ...

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

authors： Kracker S,Imai K,Gardès P,Ochs HD,Fischer A,Durandy AH

更新日期：2010-12-21 00:00:00

abstract：:Forkhead box g1 (Foxg1) is a nuclear-cytosolic transcription factor essential for the forebrain development and involved in neurodevelopmental and cancer pathologies. Despite the importance of this protein, little is known about the modalities by which it exerts such a large number of cellular functions. Here we show ...

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

authors： Pancrazi L,Di Benedetto G,Colombaioni L,Della Sala G,Testa G,Olimpico F,Reyes A,Zeviani M,Pozzan T,Costa M

更新日期：2015-11-10 00:00:00

abstract：:A central tenet in understanding the biological effects of ionizing radiation has been that the initially affected cells were directly damaged by the radiation. By contrast, evidence has emerged concerning "bystander" responses involving damage to nearby cells that were not themselves directly traversed by the radiati...

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

authors： Belyakov OV,Mitchell SA,Parikh D,Randers-Pehrson G,Marino SA,Amundson SA,Geard CR,Brenner DJ

更新日期：2005-10-04 00:00:00

abstract：:Conventional wisdom regarding mechanisms of bacterial pathogenesis holds that pathogens arise by external acquisition of distinct virulence factors, whereas determinants shared by pathogens and commensals are considered to be functionally equivalent and have been ignored as genes that could become adapted specifically...

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

authors： Sokurenko EV,Chesnokova V,Dykhuizen DE,Ofek I,Wu XR,Krogfelt KA,Struve C,Schembri MA,Hasty DL

更新日期：1998-07-21 00:00:00

abstract：:Fluorescence of quinacrine in the presence of different polynucleotides was studied to attempt to identify the specific nucleotides responsible for the fluorescence of stained chromosome preparations. A marked enhancement of fluorescence was seen in the presence of bihelical polynucleotides, such as poly(dA-dT), poly(...

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

authors： Weisblum B,De Haseth PL

更新日期：1972-03-01 00:00:00

abstract：:The evolution of sensory systems has let mammals develop complicated tactile end organs to enable sophisticated sensory tasks, including social interaction, environmental exploration, and tactile discrimination. The Merkel disc, a main type of tactile end organ consisting of Merkel cells (MCs) and Aβ-afferent endings,...

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

authors： Chang W,Kanda H,Ikeda R,Ling J,DeBerry JJ,Gu JG

更新日期：2016-09-13 00:00:00

abstract：:We previously have identified a subpopulation of contact-insensitive (CS-) cells which lacks density-dependent inhibition of cell division in primary and low-passage cultures of Syrian hamster embryonic (SHE) fibroblastic cells. Further, we have shown that the proportion of these CS- cells declines as a result of the ...

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

authors： Nakano S,Ueo H,Bruce SA,Ts'o PO

更新日期：1985-08-01 00:00:00

abstract：:Direct measurements of the intracellular level of lambda repressor have been made by a DNA-filter assay and a radioimmune assay. Transcription of cI, the structural gene for repressor, appears to initiate at two different promoters, prm and pre. Promoter pre is activated during the establishment of lysogeny by the act...

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

authors： Reichardt L,Kaiser AD

更新日期：1971-09-01 00:00:00

abstract：:Tissue cultures of Actinidia kolomikta can be maintained as callus through repeated passages on a nutrient medium devoid of cytokinin but containing inorganic nutrients, sucrose, and other basal organics plus auxin. Under these conditions, actively growing callus contained 2 and 0.5 nmol of the cytokinins zeatin [io(6...

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

authors： Einset JW

更新日期：1986-02-01 00:00:00

abstract：:Bone marrow mononuclear cells (BMC) from patients with ischemic cardiomyopathy (ICMP) show a reduced neovascularization capacity in vivo. NO plays an important role in neovascularization, and NO bioavailability is typically reduced in patients with ICMP. We investigated whether the impaired neovascularization capacity...

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

authors： Sasaki K,Heeschen C,Aicher A,Ziebart T,Honold J,Urbich C,Rossig L,Koehl U,Koyanagi M,Mohamed A,Brandes RP,Martin H,Zeiher AM,Dimmeler S

更新日期：2006-09-26 00:00:00

abstract：:It is shown that a very simple semiempirical equation represents quite accurately the thermodynamic properties of aqueous sodium chloride from 373 to 823 K. The equation comprises one Margules term and a Debye-Hückel term. Just the one Margules parameter is freely adjustable because the Debye-Hückel parameter is deter...

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

authors： Pitzer KS,Li YG

更新日期：1983-12-01 00:00:00