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Young RD, Roche J, Carlini RD, Thomas AW. Extracting nucleon strange and anapole form factors from world data. PHYSICAL REVIEW LETTERS 2006; 97:102002. [PMID: 17025805 DOI: 10.1103/physrevlett.97.102002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2006] [Indexed: 05/12/2023]
Abstract
The complete world set of parity-violating electron scattering data up to Q2 approximately 0.3 GeV2 is analyzed. We extract the current experimental determination of the strange electric and magnetic form factors of the proton, as well as the weak axial form factors of the proton and neutron, at Q2=0.1 GeV2. Within experimental uncertainties, we find that the strange form factors are consistent with zero, as are the anapole contributions to the axial form factors. Nevertheless, the correlation between the strange and anapole contributions suggest that there is only a small probability that these form factors all vanish simultaneously.
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Roche J, Roche A, Adair GS, Adair ME. The osmotic pressure of globin. Biochem J 2006; 26:1811-28. [PMID: 16745006 PMCID: PMC1261106 DOI: 10.1042/bj0261811] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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78
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Roche J, Roche A, Adair GS, Adair ME. Osmotic equilibria of haemocyanin in a gravitational field. Biochem J 2006; 29:2576-87. [PMID: 16745943 PMCID: PMC1266799 DOI: 10.1042/bj0292576] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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80
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Aniol KA, Armstrong DS, Averett T, Benaoum H, Bertin PY, Burtin E, Cahoon J, Cates GD, Chang CC, Chao YC, Chen JP, Choi S, Chudakov E, Craver B, Cusanno F, Decowski P, Deepa D, Ferdi C, Feuerbach RJ, Finn JM, Frullani S, Fuoti K, Garibaldi F, Gilman R, Glamazdin A, Gorbenko V, Grames JM, Hansknecht J, Higinbotham DW, Holmes R, Holmstrom T, Humensky TB, Ibrahim H, de Jager CW, Jiang X, Kaufman LJ, Kelleher A, Kolarkar A, Kowalski S, Kumar KS, Lambert D, LaViolette P, LeRose J, Lhuillier D, Liyanage N, Margaziotis DJ, Mazouz M, McCormick K, Meekins DG, Meziani ZE, Michaels R, Moffit B, Monaghan P, Munoz-Camacho C, Nanda S, Nelyubin V, Neyret D, Paschke KD, Poelker M, Pomatsalyuk R, Qiang Y, Reitz B, Roche J, Saha A, Singh J, Snyder R, Souder PA, Subedi R, Suleiman R, Sulkosky V, Tobias WA, Urciuoli GM, Vacheret A, Voutier E, Wang K, Wilson R, Wojtsekhowski B, Zheng X. Parity-violating electron scattering from 4He and the strange electric form factor of the nucleon. PHYSICAL REVIEW LETTERS 2006; 96:022003. [PMID: 16486563 DOI: 10.1103/physrevlett.96.022003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2005] [Indexed: 05/06/2023]
Abstract
We have measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from 4He at an average scattering angle <theta(lab)> = 5.7 degrees and a four-momentum transfer Q2 = 0.091 GeV2 . From these data, for the first time, the strange electric form factor of the nucleon G(E)s can be isolated. The measured asymmetry of A(PV) = (6.72 +/- 0.84(stat) +/- 0.21(syst) x 10(-6) yields a value of G(E)s = -0.038 +/- 0.042(stat) +/- 0.010(syst), consistent with zero.
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Aquaron R, Berge-Lefranc JL, Badens C, Roche J, Fite A, Sainte-Marie D, Piquion N, Cartault F. [Oculocutaneous albinism in French overseas territories (Reunion, French Guyana, Martinique) and Mayotte. Study of 21 cases in 16 families]. MEDECINE TROPICALE : REVUE DU CORPS DE SANTE COLONIAL 2005; 65:584-91. [PMID: 16555521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The dual purpose of this study was to determine the genotype of patients with oculocutaneous albinism type 1 and 2 based on analysis of tyrosinase and P gene mutations and to attempt to establish a correlation between phenotype and genotype. This study included a total of 21 Caucasian, Indian and Black African patients from La Reunion, la Martinique, French Guyana and Mayotte. PCR-sequencing of genomic DNA was performed to detect tyrosinase gene mutations and PCR-separation of PCR products by agarose gel electrophoresis was performed to detect 2.7kb deletion allele of the P gene. Tyrosinase gene mutations were identified in two cases, i.e., on eheterozygous guanine "g" deletion (c.572 delG) with a frameshift (Gly191fs) resulting in apremature termination signal at codon 225 in a Caucasian patient from La Reunion and one homozygous missense mutation, Glycine419Arginine, in an Indian patient from La Reunion. The 2.7-kb deletion allele of the P gene was detected in three Black African patients, i.e. two in the homozygous state in siblings from Mayotte and one in the heterozygous state in a girl from la Martinique. The latter patient whose mother was from la Martinique inherited the mutation from her father who was from Cameroon. This study shows that characterization of tyrosinase and P gene mutations in albinos patients is crucial to (a) differentiate subjects with oculocutaneous albinism types 1 and 2 and establish a correlation between phenotype and genotype, (b) identify healthy heterozygous carriers among the patient's immediate family (parents and siblings) and (c) allow prenatal diagnosis during subsequent pregnancies in couples who have already engendered albino children with severe visual phenotype and documented mutation(s).
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Kramer K, Armstrong DS, Averett TD, Bertozzi W, Binet S, Butuceanu C, Camsonne A, Cates GD, Chen JP, Choi S, Chudakov E, Cusanno F, Deur A, Djawotho P, Dutta D, Finn JM, Gao H, Garibaldi F, Gayou O, Gilman R, Glamazdin A, Gorbenko V, Griffioen KA, Hansen JO, Higinbotham DW, Hinton W, Horn T, de Jager CW, Jiang X, Korsch W, LeRose J, Lhuillier D, Liyanage N, Margaziotis DJ, McCormick K, Meziani ZE, Michaels R, Milbrath B, Moffit B, Nanda S, Perdrisat CF, Pomatsalyuk R, Punjabi V, Reitz B, Roche J, Roché R, Roedelbronn M, Savvinov N, Secrest J, Singh J, Sirca S, Slifer K, Solvignon P, Steiner DJ, Suleiman R, Sulkosky V, Tobias A, Vacheret A, Xiao Y, Zheng X, Zhou J, Zhu L, Zhu X, Zołnierczuk PA. Q2 dependence of the neutron spin structure function g2(n) at low Q2. PHYSICAL REVIEW LETTERS 2005; 95:142002. [PMID: 16241646 DOI: 10.1103/physrevlett.95.142002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2005] [Indexed: 05/05/2023]
Abstract
We present the first measurement of the Q2 dependence of the neutron spin structure function g2(n) at five kinematic points covering 0.57 (GeV/c)2 < or = Q2 < or = 1.34 (GeV/c)2 at x approximately = 0.2. Though the naive quark-parton model predicts g2 = 0, nonzero values occur in more realistic models of the nucleon which include quark-gluon correlations, finite quark masses, or orbital angular momentum. When scattering from a noninteracting quark, g2(n) can be predicted using next-to-leading order fits to world data for g1(n). Deviations from this prediction provide an opportunity to examine QCD dynamics in nucleon structure. Our results show a positive deviation from this prediction at lower Q2, indicating that contributions such as quark-gluon interactions may be important. Precision data obtained for g1(n) are consistent with next-to-leading order fits to world data.
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Armstrong DS, Arvieux J, Asaturyan R, Averett T, Bailey SL, Batigne G, Beck DH, Beise EJ, Benesch J, Bimbot L, Birchall J, Biselli A, Bosted P, Boukobza E, Breuer H, Carlini R, Carr R, Chant N, Chao YC, Chattopadhyay S, Clark R, Covrig S, Cowley A, Dale D, Davis C, Falk W, Finn JM, Forest T, Franklin G, Furget C, Gaskell D, Grames J, Griffioen KA, Grimm K, Guillon B, Guler H, Hannelius L, Hasty R, Hawthorne Allen A, Horn T, Johnston K, Jones M, Kammel P, Kazimi R, King PM, Kolarkar A, Korkmaz E, Korsch W, Kox S, Kuhn J, Lachniet J, Lee L, Lenoble J, Liatard E, Liu J, Loupias B, Lung A, MacLachlan GA, Marchand D, Martin JW, McFarlane KW, McKee DW, McKeown RD, Merchez F, Mkrtchyan H, Moffit B, Morlet M, Nakagawa I, Nakahara K, Nakos M, Neveling R, Niccolai S, Ong S, Page S, Papavassiliou V, Pate SF, Phillips SK, Pitt ML, Poelker M, Porcelli TA, Quéméner G, Quinn B, Ramsay WD, Rauf AW, Real JS, Roche J, Roos P, Rutledge GA, Secrest J, Simicevic N, Smith GR, Spayde DT, Stepanyan S, Stutzman M, Sulkosky V, Tadevosyan V, Tieulent R, van de Wiele J, van Oers W, Voutier E, Vulcan W, Warren G, Wells SP, Williamson SE, Wood SA, Yan C, Yun J, Zeps V. Strange-quark contributions to parity-violating asymmetries in the forward g0 electron-proton scattering experiment. PHYSICAL REVIEW LETTERS 2005; 95:092001. [PMID: 16197209 DOI: 10.1103/physrevlett.95.092001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2005] [Indexed: 05/04/2023]
Abstract
We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < or =Q2 < or =1.0 GeV2. These asymmetries, arising from interference of the electromagnetic and neutral weak interactions, are sensitive to strange-quark contributions to the currents of the proton. The measurements were made at Jefferson Laboratory using a toroidal spectrometer to detect the recoiling protons from a liquid hydrogen target. The results indicate nonzero, Q2 dependent, strange-quark contributions and provide new information beyond that obtained in previous experiments.
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Mant J, Winner S, Roche J, Wade DT. Family support for stroke: one year follow up of a randomised controlled trial. J Neurol Neurosurg Psychiatry 2005; 76:1006-8. [PMID: 15965213 PMCID: PMC1739696 DOI: 10.1136/jnnp.2004.048991] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND There is evidence that family support can benefit carers of stroke patients, but not the patients themselves. OBJECTIVE To extend the follow up of a single blind randomised controlled trial of family support for stroke patients and carers to one year to ascertain whether there were any late effects of the intervention. METHODS The study was a randomised controlled trial. Patients admitted to hospital with acute stroke who had a close carer were assigned to receive family support or normal care. Families were visited at home by a researcher 12 months after the stroke, and a series of questionnaires was administered to patient and carer. RESULTS The benefits to carers mostly persisted, though they were no longer statistically significant because some patients were lost to follow up. There was no evidence of any effects on patients. CONCLUSION Family support is effective for carers, but different approaches need to be considered to alleviate the psychosocial problems of stroke patients.
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85
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Roche J, Roup B. Health department communications with infection control professionals across the spectrum of healthcare. Am J Infect Control 2005. [DOI: 10.1016/j.ajic.2005.04.128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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86
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Dohrmann F, Ahmidouch A, Armstrong CS, Arrington J, Asaturyan R, Avery S, Bailey K, Bitao H, Breuer H, Brown DS, Carlini R, Cha J, Chant N, Christy E, Cochran A, Cole L, Crowder J, Danagoulian S, Elaasar M, Ent R, Fenker H, Fujii Y, Gan L, Garrow K, Geesaman DF, Gueye P, Hafidi K, Hinton W, Juengst H, Keppel C, Liang Y, Liu JH, Lung A, Mack D, Markowitz P, Mitchell J, Miyoshi T, Mkrtchyan H, Mtingwa SK, Mueller B, Niculescu G, Niculescu I, Potterveld D, Raue BA, Reimer PE, Reinhold J, Roche J, Sarsour M, Sato Y, Segel RE, Semenov A, Stepanyan S, Tadevosian V, Tajima S, Tang L, Uzzle A, Wood S, Yamaguchi H, Yan C, Yuan L, Zeidman B, Zeier M, Zihlmann B. Angular distributions for (3,4)(Lambda)H bound states in the (3,4)He(e,e(')K+) reaction. PHYSICAL REVIEW LETTERS 2004; 93:242501. [PMID: 15697799 DOI: 10.1103/physrevlett.93.242501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2004] [Indexed: 05/24/2023]
Abstract
The (3,4)(Lambda)H and (4)(Lambda)H hypernuclear bound states have been observed for the first time in kaon electroproduction on (3,4)He targets. The production cross sections have been determined at Q(2)=0.35 GeV2 and W=1.91 GeV. For either hypernucleus the nuclear form factor is determined by comparing the angular distribution of the (3,4)He(e,e(')K+)(3,4)(Lambda)H processes to the elementary cross section 1H(e,e K+)Lambda on the free proton, measured during the same experiment.
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87
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Roche J, Zeng C, Barón A, Gadgil S, Gemmill RM, Tigaud I, Thomas X, Drabkin HA. Hox expression in AML identifies a distinct subset of patients with intermediate cytogenetics. Leukemia 2004; 18:1059-63. [PMID: 15085154 DOI: 10.1038/sj.leu.2403366] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We previously reported that favorable and poor prognostic chromosomal rearrangements in acute myeloid leukemia (AML) were associated with distinct levels of HOX expression. We have now analyzed HOX expression in 50 independent adult AML patients (median age=62 years), together with FLT3 and FLT3-ligand mRNA levels, and FLT3 mutation determination. By cluster analysis, we could divide AMLs into cases with low, intermediate and high HOX expression. Cases with high expression were uniquely restricted to a subset of AMLs with intermediate cytogenetics (P=0.0174). This subset has significantly higher levels of FLT3 expression and appears to have an increase of FLT3 mutations (44%), while CEBPalpha mutations were infrequent (6%). FLT3 mRNA levels were correlated with the expression of multiple HOX genes, whereas FLT3 mutations were correlated with HOXB3. In some cases, FLT3 was expressed at levels equivalent to GAPDH in the absence of genomic amplification. We propose that high HOX expression may be characteristically associated with a distinct biologic subset of AML. The apparent global upregulation of HOX expression could be due to growth-factor signaling or, alternatively, these patterns may reflect a particular stage of differentiation of the leukemic cells.
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88
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Ito TM, Averett T, Barkhuff D, Batigne G, Beck DH, Beise EJ, Blake A, Breuer H, Carr R, Clasie B, Covrig S, Danagoulian A, Dodson G, Dow K, Dutta D, Farkhondeh M, Filippone BW, Franklin W, Furget C, Gao H, Gao J, Gustafsson K, Hannelius L, Hasty R, Hawthorne-Allen AM, Herda MC, Jones CE, King P, Korsch W, Kowalski S, Kox S, Kramer K, Lee P, Liu J, Martin JW, McKeown RD, Mueller B, Pitt ML, Plaster B, Quéméner G, Réal JS, Ritter J, Roche J, Savu V, Schiavilla R, Seely J, Spayde D, Suleiman R, Taylor S, Tieulent R, Tipton B, Tsentalovich E, Wells SP, Yang B, Yuan J, Yun J, Zwart T. Parity-violating electron deuteron scattering and the proton's neutral weak axial vector form factor. PHYSICAL REVIEW LETTERS 2004; 92:102003. [PMID: 15089200 DOI: 10.1103/physrevlett.92.102003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2003] [Indexed: 05/24/2023]
Abstract
We report on a new measurement of the parity-violating asymmetry in quasielastic electron scattering from the deuteron at backward angles at Q2=0.038 (GeV/c)2. This quantity provides a determination of the neutral weak axial vector form factor of the nucleon, which can potentially receive large electroweak corrections. The measured asymmetry A=-3.51+/-0.57 (stat)+/-0.58 (syst) ppm is consistent with theoretical predictions. We also report on updated results of the previous experiment at Q2=0.091 (GeV/c)2, which are also consistent with theoretical predictions.
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89
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Cano J, Berzosa PJ, Roche J, Rubio JM, Moyano E, Guerra-Neira A, Brochero H, Mico M, Edú M, Benito A. Malaria vectors in the Bioko Island (Equatorial Guinea): estimation of vector dynamics and transmission intensities. JOURNAL OF MEDICAL ENTOMOLOGY 2004; 41:158-161. [PMID: 15061273 DOI: 10.1603/0022-2585-41.2.158] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The current study was performed on the Bioko Island (Equatorial Guinea) with the aim of establishing a rapid assessment technique for mapping malaria risk and measuring vector densities. Human bait collection, tent traps, light traps, indoor resting collection, and window exit traps were used to collect Anopheles gambiae s.s. and Anopheles funestus, the two anopheline species involved in malaria transmission in this island. Capture data were used to compare differences in the behavior and vectorial capacity of An. gambiae s.s. and An. funestus. Differences in the two species of mosquitoes were found in relation to the season and trapping methods used. Entomological inoculation rates (EIR) for Plasmodium falciparum were calculated using a polymerase chain reaction (PCR) test with individual anopheline mosquitoes from human bait collections in two villages during the dry and rainy seasons. P. falciparum sporozoites were detected from both dissected heads/thorax and abdomens of both species.
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90
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Warren G, Wesselmann F, Zhu H, McKee P, Savvinov N, Zeier M, Aghalaryan A, Ahmidouch A, Arenhövel H, Asaturyan R, Ben-Dayan I, Bloch F, Boeglin W, Boillat B, Breuer H, Brower J, Carasco C, Carl M, Carlini R, Cha J, Chant N, Christy E, Cole L, Coman L, Coman M, Crabb D, Danagoulian S, Day D, Duek K, Dunne J, Elaasar M, Ent R, Farrell J, Fatemi R, Fawcett D, Fenker H, Forest T, Garrow K, Gasparian A, Goussev I, Gueye P, Harvey M, Hauger M, Herrera R, Hu B, Jaegle I, Jones M, Jourdan J, Keith C, Kelly J, Keppel C, Khandaker M, Klein A, Klimenko A, Kramer L, Krusche B, Kuhn S, Liang Y, Lichtenstadt J, Lindgren R, Liu J, Lung A, Mack D, Maclachlan G, Markowitz P, McNulty D, Meekins D, Mitchell J, Mkrtchyan H, Nasseripour R, Niculescu I, Normand K, Norum B, Opper A, Piasetzky E, Pierce J, Pitt M, Prok Y, Raue B, Reinhold J, Roche J, Rohe D, Rondon O, Sacker D, Sawatzky B, Seely M, Sick I, Simicevic N, Smith C, Smith G, Steinacher M, Stepanyan S, Stout J, Tadevosyan V, Tajima S, Tang L, Testa G, Trojer R, Vlahovic B, Vulcan B, Wang K, Wells S, Woehrle H, Wood S, Yan C, Yanay Y, Yuan L, Yun J, Zihlmann B. Measurement of the electric form factor of the neutron at Q2=0.5 and 1.0 GeV2/c2. PHYSICAL REVIEW LETTERS 2004; 92:042301. [PMID: 14995367 DOI: 10.1103/physrevlett.92.042301] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2003] [Indexed: 05/24/2023]
Abstract
The electric form factor of the neutron was determined from measurements of the d-->(e-->,e'n)p reaction for quasielastic kinematics. Polarized electrons were scattered off a polarized deuterated ammonia (15ND3) target in which the deuteron polarization was perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons in a large solid angle detector. We find G(n)(E)=0.0526+/-0.0033(stat)+/-0.0026(sys) and 0.0454+/-0.0054+/-0.0037 at Q(2)=0.5 and 1.0 (GeV/c)(2), respectively.
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Zheng X, Aniol K, Armstrong DS, Averett TD, Bertozzi W, Binet S, Burtin E, Busato E, Butuceanu C, Calarco J, Camsonne A, Cates GD, Chai Z, Chen JP, Choi S, Chudakov E, Cusanno F, Leo RD, Deur A, Dieterich S, Dutta D, Finn JM, Frullani S, Gao H, Gao J, Garibaldi F, Gilad S, Gilman R, Gomez J, Hansen JO, Higinbotham DW, Hinton W, Horn T, De Jager CW, Jiang X, Kaufman L, Kelly J, Korsch W, Kramer K, LeRose J, Lhuillier D, Liyanage N, Margaziotis DJ, Marie F, Markowitz P, McCormick K, Meziani ZE, Michaels R, Moffit B, Nanda S, Neyret D, Phillips SK, Powell A, Pussieux T, Reitz B, Roche J, Roche R, Roedelbronn M, Ron G, Rvachev M, Saha A, Savvinov N, Singh J, Sirca S, Slifer K, Solvignon P, Souder P, Steiner DJ, Strauch S, Sulkosky V, Tobias A, Urciuoli G, Vacheret A, Wojtsekhowski B, Xiang H, Xiao Y, Xiong F, Zhang B, Zhu L, Zhu X, Zołnierczuk PA. Precision measurement of the neutron spin asymmetryA(n)(1) and spin-flavor decomposition in the valence quark region. PHYSICAL REVIEW LETTERS 2004; 92:012004. [PMID: 14753984 DOI: 10.1103/physrevlett.92.012004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2003] [Indexed: 05/24/2023]
Abstract
We have measured the neutron spin asymmetry A(n)(1) with high precision at three kinematics in the deep inelastic region at x=0.33, 0.47, and 0.60, and Q(2)=2.7, 3.5, and 4.8 (GeV/c)(2), respectively. Our results unambiguously show, for the first time, that A(n)(1) crosses zero around x=0.47 and becomes significantly positive at x=0.60. Combined with the world proton data, polarized quark distributions were extracted. Our results, in general, agree with relativistic constituent quark models and with perturbative quantum chromodynamics (PQCD) analyses based on the earlier data. However they deviate from PQCD predictions based on hadron helicity conservation.
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92
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Madey R, Semenov AY, Taylor S, Plaster B, Aghalaryan A, Crouse E, MacLachlan G, Tajima S, Tireman W, Yan C, Ahmidouch A, Anderson BD, Arenhövel H, Asaturyan R, Baker OK, Baldwin AR, Barkhuff D, Breuer H, Carlini R, Christy E, Churchwell S, Cole L, Danagoulian S, Day D, Eden T, Elaasar M, Ent R, Farkhondeh M, Fenker H, Finn JM, Gan L, Garrow K, Gasparian A, Gueye P, Howell CR, Hu B, Jones MK, Kelly JJ, Keppel C, Khandaker M, Kim WY, Kowalski S, Lai A, Lung A, Mack D, Manley DM, Markowitz P, Mitchell J, Mkrtchyan H, Opper AK, Perdrisat C, Punjabi V, Raue B, Reichelt T, Reinhold J, Roche J, Sato Y, Savvinov N, Semenova IA, Seo W, Simicevic N, Smith G, Stepanyan S, Tadevosyan V, Tang L, Ulmer PE, Vulcan W, Watson JW, Wells S, Wesselmann F, Wood S, Yan C, Yang S, Yuan L, Zhang WM, Zhu H, Zhu X. Measurements of GnE/GnM from the 2H(e-->,en-->)1H Reaction to Q2=1.45 (GeV/c)2. PHYSICAL REVIEW LETTERS 2003; 91:122002. [PMID: 14525355 DOI: 10.1103/physrevlett.91.122002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2003] [Indexed: 05/24/2023]
Abstract
We report new measurements of the ratio of the electric form factor to the magnetic form factor of the neutron, G(n)(E)/G(n)(M), obtained via recoil polarimetry from the quasielastic 2H(e-->,e(')n-->)1H reaction at Q2 values of 0.45, 1.13, and 1.45 (GeV/c)(2) with relative statistical uncertainties of 7.6% and 8.4% at the two higher Q2 points, which points have never been achieved in polarization measurements.
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Miyoshi T, Sarsour M, Yuan L, Zhu X, Ahmidouch A, Ambrozewicz P, Androic D, Angelescu T, Asaturyan R, Avery S, Baker OK, Bertovic I, Breuer H, Carlini R, Cha J, Chrien R, Christy M, Cole L, Danagoulian S, Dehnhard D, Elaasar M, Empl A, Ent R, Fenker H, Fujii Y, Furic M, Gan L, Garrow K, Gasparian A, Gueye P, Harvey M, Hashimoto O, Hinton W, Hu B, Hungerford E, Jackson C, Johnston K, Juengst H, Keppel C, Lan K, Liang Y, Likhachev VP, Liu JH, Mack D, Margaryan A, Markowitz P, Martoff J, Mkrtchyan H, Nakamura SN, Petkovic T, Reinhold J, Roche J, Sato Y, Sawafta R, Simicevic N, Smith G, Stepanyan S, Tadevosyan V, Takahashi T, Tanida K, Tang L, Ukai M, Uzzle A, Vulcan W, Wells S, Wood S, Xu G, Yamaguchi H, Yan C. High resolution spectroscopy of the 12Lambda B hypernucleus produced by the (e,e'K+) reaction. PHYSICAL REVIEW LETTERS 2003; 90:232502. [PMID: 12857252 DOI: 10.1103/physrevlett.90.232502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2002] [Indexed: 05/24/2023]
Abstract
High-energy, cw electron beams at new accelerator facilities allow electromagnetic production and precision study of hypernuclear structure, and we report here on the first experiment demonstrating the potential of the (e,e'K+) reaction for hypernuclear spectroscopy. This experiment is also the first to take advantage of the enhanced virtual photon flux available when electrons are scattered at approximately zero degrees. The observed energy resolution was found to be approximately 900 keV for the (12)(Lambda)B spectrum, and is substantially better than any previous hypernuclear experiment using magnetic spectrometers. The positions of the major excitations are found to be in agreement with a theoretical prediction and with a previous binding energy measurement, but additional structure is also observed in the core excited region, underlining the future promise of this technique.
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Ong A, Anderson J, Roche J. A pilot study of the prevalence of lumbar disc degeneration in elite athletes with lower back pain at the Sydney 2000 Olympic Games. Br J Sports Med 2003; 37:263-6. [PMID: 12782554 PMCID: PMC1724651 DOI: 10.1136/bjsm.37.3.263] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To observe the prevalence of lumbar intervertebral disc degeneration in elite athletes as compared with published literature of changes seen in non-athletes-that is, normal population. METHODS The lumbar spines of 31 Olympic athletes who presented to the Olympic Polyclinic with low back pain and/or sciatica were examined using magnetic resonance imaging. Three criteria were looked at: (a) the loss of disc signal intensity; (b) the loss of disc height; (c) the presence of disc displacement. The results were then recorded and correlated with the lumbar levels. RESULTS The disc signal intensity was progressively reduced the more caudal the disc space. It was most common at the L5/S1 level, and, of the abnormal group, 36% (n = 11) showed the most degenerative change. Disc height reduction was also found to be most common at the L5/S1 level. However, the most common height reduction was only mild. A similar trend of increased prevalence of disc herniation was noted with more caudal levels. At the L5/S1 level, 58% were found to have an element of disc displacement, most of which were disc bulges. Compared with changes seen in the normal population (non-athletes) as described in the literature, disc degeneration defined by the above criteria was found to be significantly more severe in these Olympic athletes. CONCLUSIONS Although the study was limited, the results suggest that elite athletes have a greater prevalence and greater degree of lumbar disc degeneration than the normal population. A more detailed follow up study should be considered to investigate which particular training activities have the most impact on the lumbar spine, and how to modify training methods so as to avoid the long term sequelae of degenerative disc disease of the lumbar spine.
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95
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Berzosa PJ, Cano J, Roche J, Rubio JM, García L, Moyano E, Guerra A, Mateos JC, Petrarca V, Rosario VD, Benito A. Malaria vectors in Bioko Island (Equatorial Guinea): PCR determination of the members of Anopheles gambiae Giles complex (Diptera: Culicidae) and pyrethroid knockdown resistance (kdr) in An. gambiae sensu stricto. JOURNAL OF VECTOR ECOLOGY : JOURNAL OF THE SOCIETY FOR VECTOR ECOLOGY 2002; 27:102-106. [PMID: 12125862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Anopheles gambiae sensu lato Giles, 1902 and Anophelesfunestus Giles, 1900 are the main malaria vectors on the island of Bioko (Equatorial Guinea). This study was carried out to determine: a) members of the An. gambiae complex that may be present on the island of Bioko and, b) the sensitivity of An. gambiae sensu stricto to pyrethroids. The analysis by PCR detected the presence of An. gambiae s.s. as the major vector of the complex and the "forest chromosomal form" was demonstrated by cytogenetic analysis. The presence of Anopheles melas in the southwest, north and southeast of the island justifies its study as a vector. The molecular characterization of pyrethroid knockdown resistance (kdr) showed that the populations of An. gambiae s.s. were sensitive and no mutations were found. This fact justifies the implementation on a large scale of pyrethroid-impregnated bednets within the framework of the Malaria Control Program of Equatorial Guinea.
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96
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Drabkin HA, Parsy C, Ferguson K, Guilhot F, Lacotte L, Roy L, Zeng C, Baron A, Hunger SP, Varella-Garcia M, Gemmill R, Brizard F, Brizard A, Roche J. Quantitative HOX expression in chromosomally defined subsets of acute myelogenous leukemia. Leukemia 2002; 16:186-95. [PMID: 11840284 DOI: 10.1038/sj.leu.2402354] [Citation(s) in RCA: 145] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2001] [Accepted: 09/25/2001] [Indexed: 02/02/2023]
Abstract
We used a degenerate RT-PCR screen and subsequent real-time quantitative RT-PCR assays to examine the expression of HOX and TALE-family genes in 34 cases of chromosomally defined AML for which outcome data were available. AMLs with favorable cytogenetic features were associated with low overall HOX gene expression whereas poor prognostic cases had high levels. Characteristically, multiple HOXA family members including HOXA3-HOXA10 were jointly overexpressed in conjunction with HOXB3, HOXB6, MEIS1 and PBX3. Higher levels of expression were also observed in the FAB subtype, AML-M1. Spearmann correlation coefficients indicated that the expression levels for many of these genes were highly inter-related. While we did not detect any significant correlations between HOX expression and complete response rates or age in this limited set of patients, there was a significant correlation between event-free survival and HOXA7 with a trend toward significance for HoxA9, HoxA4 and HoxA5. While patients with elevated HOX expression did worse, there were notable exceptions. Thus, although HOX overexpression and clinical resistance to chemotherapy often coincide, they are not inextricably linked. Our results indicate that quantitative HOX analysis has the potential to add new information to the management of patients with AML, especially where characteristic chromosomal alterations are lacking.
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97
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Tomizawa Y, Sekido Y, Kondo M, Gao B, Yokota J, Roche J, Drabkin H, Lerman MI, Gazdar AF, Minna JD. Inhibition of lung cancer cell growth and induction of apoptosis after reexpression of 3p21.3 candidate tumor suppressor gene SEMA3B. Proc Natl Acad Sci U S A 2001; 98:13954-9. [PMID: 11717452 PMCID: PMC61148 DOI: 10.1073/pnas.231490898] [Citation(s) in RCA: 170] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Semaphorins SEMA3B and its homologue SEMA3F are 3p21.3 candidate tumor suppressor genes (TSGs), the expression of which is frequently lost in lung cancers. To test the TSG candidacy of SEMA3B and SEMA3F, we transfected them into lung cancer NCI-H1299 cells, which do not express either gene. Colony formation of H1299 cells was reduced 90% after transfection with wild-type SEMA3B compared with the control vector. By contrast, only 30-40% reduction in colony formation was seen after the transfection of SEMA3F or SEMA3B variants carrying lung cancer-associated single amino acid missense mutations. H1299 cells transfected with wild-type but not mutant SEMA3B underwent apoptosis. We found that lung cancers (n = 34) always express the neuropilin-1 receptor for secreted semaphorins, whereas 82% expressed the neuropilin-2 receptor. Because SEMA3B and SEMA3F are secreted proteins, we tested conditioned medium from COS-7 cells transfected with SEMA3B and SEMA3F and found that medium from wild-type SEMA3B transfectants reduced the growth of several lung cancer lines 30-90%, whereas SEMA3B mutants or SEMA3F had little effect in the same assay. Sequencing of sodium bisulfite-treated DNA showed dense methylation of CpG sites in the SEMA3B 5' region of lung cancers not expressing SEMA3B but no methylation in SEMA3B-expressing tumors. These results are consistent with SEMA3B functioning as a TSG, the expression of which is inactivated frequently in lung cancers by allele loss and promoter region methylation.
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98
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Abstract
The semaphorins are a family of secreted, transmembrane, and membrane-associated proteins initially identified as causing the repulsion of nerve growth cone guidance. However, subsequent experiments have demonstrated that they can induce retraction in non-neural cells and affect the development of non-neural organs. Two related secreted semaphorins, SEMA3F and SEMA3B, were isolated from a recurrent 3p21.3 homozygous deletion region in small-cell lung cancer (SCLC) cell lines. Moreover, a functionally related molecule, Roundabout/DUTT1, was identified as the target of a more proximal chromosome 3p deletion also involving SCLCs. Based on current data, it is likely that the loss of these semaphorins or Roundabout may affect cell migration, metastasis, and apoptosis. In addition, receptors for the secreted semaphorins, neuropilin-1 and neuropilin-2, have been shown to function as coreceptors for a subset of vascular endothelial growth factor (VEGF) isoforms and related growth factors. Since semaphorins and VEGF bind antagonistically to neuropilins, their loss is likely to facilitate angiogenesis. In lung cancer specimens, antibody staining against SEMA3F has been shown to correlate with stage and histologic subtypes with more aggressive tumors showing increased VEGF and decreased SEMA3F staining. This review is focused on a basic understanding of these pathways with an emphasis on their role in lung cancer.
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99
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Dahéron L, Veinstein A, Brizard F, Drabkin H, Lacotte L, Guilhot F, Larsen CJ, Brizard A, Roche J. Human LPP gene is fused to MLL in a secondary acute leukemia with a t(3;11) (q28;q23). Genes Chromosomes Cancer 2001; 31:382-9. [PMID: 11433529 DOI: 10.1002/gcc.1157] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The mixed lineage leukemia, MLL, gene is frequently rearranged in patients with secondary leukemia following treatment with DNA topoisomerase II inhibitors. By FISH and Southern blot analyses we identified a rearrangement in the MLL gene due to a novel t(3;11)(q28;q23) chromosomal translocation in a patient who developed AML-M5 3 years after treatment for a follicular lymphoma. Through inverse PCR, the LPP (lipoma preferred partner) gene on 3q28 was identified as the MLL fusion partner. LPP contains substantial identity to the focal adhesion protein, zyxin, and is frequently fused to HMGIC in lipomas. The breakpoint occurred in intron 8 of MLL and LPP. Two in-frame MLL-LPP transcripts, which fuse MLL exon 8 to LPP exon 9, were detected by RT-PCR, although the smaller of these contained a deletion of 120 bp from the MLL sequence. The predicted MLL-LPP fusion protein includes the A/T hook motifs and methyltransferase domain of MLL joined to the two last LIM domains of LPP. A reciprocal LPP-MLL transcript, predicted to include the proline-rich and leucine zipper motifs, and the first LIM domain of LPP were also detected by RT-PCR. In summary, LPP is a newly identified MLL fusion partner in secondary leukemia resulting from topoisomerase inhibitors. The MLL-LPP and LPP-MLL predicted proteins contain many of the features present in other MLL rearrangements.
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MESH Headings
- Adult
- Amino Acid Sequence
- Base Sequence
- Chromosome Breakage/genetics
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 3/genetics
- Cloning, Molecular
- Cytoskeletal Proteins/genetics
- DNA-Binding Proteins/genetics
- Fatal Outcome
- Female
- Histone-Lysine N-Methyltransferase
- Humans
- Karyotyping
- LIM Domain Proteins
- Leukemia, Monocytic, Acute/chemically induced
- Leukemia, Monocytic, Acute/genetics
- Lymphoma, Follicular/drug therapy
- Lymphoma, Follicular/genetics
- Molecular Sequence Data
- Myeloid-Lymphoid Leukemia Protein
- Neoplasms, Second Primary/chemically induced
- Neoplasms, Second Primary/genetics
- Oncogene Proteins, Fusion/genetics
- Proto-Oncogenes
- RNA, Messenger/genetics
- Transcription Factors
- Translocation, Genetic/genetics
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100
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Cunningham H, Roche J. Using Web CT to Determine Competency in Medication Dosage Calculation for Nursing Students. Nurse Educ 2001; 26:164-6. [PMID: 16372643 DOI: 10.1097/00006223-200107000-00010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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