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  • 1
    Publication Date: 2013-04-11
    Description: Author(s): L. Yang, C. J. Lin, H. M. Jia, X. X. Xu, F. Yang, H. Q. Zhang, Z. H. Liu, P. F. Bao, and L. J. Sun Angular distributions of 7 Li+ 11 B elastic scattering were measured at E lab ( 7 Li)=9.85, 13.3, 18.3, 23.3, and 28.3 MeV within the angular range of θ c.m. ≈15 ∘ –80 ∘ . Optical model potentials have been extracted from these angular distributions and the data available in the literature at E lab ( 7 Li)=34 MeV an... [Phys. Rev. C 87, 047601] Published Wed Apr 10, 2013
    Keywords: Nuclear Reactions
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
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  • 2
    Publication Date: 2012-10-23
    Description: Author(s): H. M. Jia, C. J. Lin, F. Yang, X. X. Xu, H. Q. Zhang, Z. H. Liu, L. Yang, S. T. Zhang, P. F. Bao, and L. J. Sun Fusion excitation functions with high precision have been measured for the 16 O+ 76 Ge and 18 O+ 74 Ge systems at energies near and below the Coulomb barrier. The barrier distributions have been extracted from the corresponding excitation functions. The coupling effect of the positive Q -value neutron tran... [Phys. Rev. C 86, 044621] Published Mon Oct 22, 2012
    Keywords: Nuclear Reactions
    Print ISSN: 0556-2813
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  • 3
    Publication Date: 2012-02-25
    Description: Author(s): Y. G. Ma (马余刚), G. H. Liu (刘桂华), X. Z. Cai (蔡翔舟), D. Q. Fang (方德清), W. Guo (郭威), W. Q. Shen (沈文庆), W. D. Tian (田文栋), and H. W. Wang (王宏伟) Hard photons emitted from energetic heavy-ion collisions are very interesting since they do not experience nuclear interaction, and therefore they are useful to explore properties of nuclear matter. We investigated hard-photon production and its properties in intermediate-energy heavy-ion collisions... [Phys. Rev. C 85, 024618] Published Fri Feb 24, 2012
    Keywords: Nuclear Reactions
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
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  • 4
    Publication Date: 2014-04-29
    Description: Author(s): L. Yang, C. J. Lin, H. M. Jia, F. Yang, Z. D. Wu, X. X. Xu, H. Q. Zhang, Z. H. Liu, P. F. Bao, L. J. Sun, and N. R. Ma Angular distributions of the Pb208(Li7,He6)Bi209 reactions with one-proton transferred to the ground, first-excited, and second-excited states of Bi209 were measured at Elab=25.67, 28.55, 32.55, 37.55, and 42.55 MeV. The experimental data and the data available in the literature at Elab=52 MeV were ... [Phys. Rev. C 89, 044615] Published Mon Apr 28, 2014
    Keywords: Nuclear Reactions
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
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  • 5
    Publication Date: 2014-09-04
    Description: Author(s): H. M. Jia, C. J. Lin, F. Yang, X. X. Xu, H. Q. Zhang, Z. H. Liu, Z. D. Wu, L. Yang, N. R. Ma, P. F. Bao, and L. J. Sun Background: The hexadecapole deformation β4 is usually difficult to determine experimentally, especially its sign. The rapidly accumulated knowledge of β2 inspires the desire of β4 for radioactive nuclei, but the current low-quality beam is a severe experimental challenge. Therefore, a simple but se... [Phys. Rev. C 90, 031601] Published Wed Sep 03, 2014
    Keywords: Nuclear Reactions
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
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  • 6
    Publication Date: 2010-09-08
    Description: Cell cycle checkpoints are implemented to safeguard the genome, avoiding the accumulation of genetic errors. Checkpoint loss results in genomic instability and contributes to the evolution of cancer. Among G1-, S-, G2- and M-phase checkpoints, genetic studies indicate the role of an intact S-phase checkpoint in maintaining genome integrity. Although the basic framework of the S-phase checkpoint in multicellular organisms has been outlined, the mechanistic details remain to be elucidated. Human chromosome-11 band-q23 translocations disrupting the MLL gene lead to poor prognostic leukaemias. Here we assign MLL as a novel effector in the mammalian S-phase checkpoint network and identify checkpoint dysfunction as an underlying mechanism of MLL leukaemias. MLL is phosphorylated at serine 516 by ATR in response to genotoxic stress in the S phase, which disrupts its interaction with, and hence its degradation by, the SCF(Skp2) E3 ligase, leading to its accumulation. Stabilized MLL protein accumulates on chromatin, methylates histone H3 lysine 4 at late replication origins and inhibits the loading of CDC45 to delay DNA replication. Cells deficient in MLL showed radioresistant DNA synthesis and chromatid-type genomic abnormalities, indicative of S-phase checkpoint dysfunction. Reconstitution of Mll(-/-) (Mll also known as Mll1) mouse embryonic fibroblasts with wild-type but not S516A or DeltaSET mutant MLL rescues the S-phase checkpoint defects. Moreover, murine myeloid progenitor cells carrying an Mll-CBP knock-in allele that mimics human t(11;16) leukaemia show a severe radioresistant DNA synthesis phenotype. MLL fusions function as dominant negative mutants that abrogate the ATR-mediated phosphorylation/stabilization of wild-type MLL on damage to DNA, and thus compromise the S-phase checkpoint. Together, our results identify MLL as a key constituent of the mammalian DNA damage response pathway and show that deregulation of the S-phase checkpoint incurred by MLL translocations probably contributes to the pathogenesis of human MLL leukaemias.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2940944/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2940944/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Han -- Takeda, Shugaku -- Kumar, Rakesh -- Westergard, Todd D -- Brown, Eric J -- Pandita, Tej K -- Cheng, Emily H-Y -- Hsieh, James J-D -- CA119008/CA/NCI NIH HHS/ -- CA123232/CA/NCI NIH HHS/ -- CA129537/CA/NCI NIH HHS/ -- R01 CA119008/CA/NCI NIH HHS/ -- R01 CA119008-01/CA/NCI NIH HHS/ -- R01 CA119008-02/CA/NCI NIH HHS/ -- R01 CA119008-03/CA/NCI NIH HHS/ -- R01 CA119008-04/CA/NCI NIH HHS/ -- R01 CA119008-05/CA/NCI NIH HHS/ -- England -- Nature. 2010 Sep 16;467(7313):343-6. doi: 10.1038/nature09350. Epub 2010 Sep 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Washington University School of Medicine, St Louis, Missouri 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20818375" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Ataxia Telangiectasia Mutated Proteins ; Cell Cycle Proteins/*metabolism ; Cell Line ; Chromatin/metabolism ; DNA Damage ; DNA Replication/physiology ; Genes, Dominant/genetics ; Genomic Instability/physiology ; Histone-Lysine N-Methyltransferase ; Histones/chemistry/metabolism ; Humans ; Leukemia/genetics ; Lysine/metabolism ; Methylation ; Mice ; Myeloid Progenitor Cells/metabolism ; Myeloid-Lymphoid Leukemia Protein/chemistry/deficiency/genetics/*metabolism ; Phosphorylation ; Phosphoserine/metabolism ; Protein Binding ; Protein-Serine-Threonine Kinases/*metabolism ; S Phase/*physiology ; S-Phase Kinase-Associated Proteins/metabolism ; Signal Transduction ; Translocation, Genetic/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 2010-06-18
    Description: Sialic acid acetylesterase (SIAE) is an enzyme that negatively regulates B lymphocyte antigen receptor signalling and is required for the maintenance of immunological tolerance in mice. Heterozygous loss-of-function germline rare variants and a homozygous defective polymorphic variant of SIAE were identified in 24/923 subjects of European origin with relatively common autoimmune disorders and in 2/648 controls of European origin. All heterozygous loss-of-function SIAE mutations tested were capable of functioning in a dominant negative manner. A homozygous secretion-defective polymorphic variant of SIAE was catalytically active, lacked the ability to function in a dominant negative manner, and was seen in eight autoimmune subjects but in no control subjects. The odds ratio for inheriting defective SIAE alleles was 8.6 in all autoimmune subjects, 8.3 in subjects with rheumatoid arthritis, and 7.9 in subjects with type I diabetes. Functionally defective SIAE rare and polymorphic variants represent a strong genetic link to susceptibility in relatively common human autoimmune disorders.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2900412/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2900412/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Surolia, Ira -- Pirnie, Stephan P -- Chellappa, Vasant -- Taylor, Kendra N -- Cariappa, Annaiah -- Moya, Jesse -- Liu, Haoyuan -- Bell, Daphne W -- Driscoll, David R -- Diederichs, Sven -- Haider, Khaleda -- Netravali, Ilka -- Le, Sheila -- Elia, Roberto -- Dow, Ethan -- Lee, Annette -- Freudenberg, Jan -- De Jager, Philip L -- Chretien, Yves -- Varki, Ajit -- MacDonald, Marcy E -- Gillis, Tammy -- Behrens, Timothy W -- Bloch, Donald -- Collier, Deborah -- Korzenik, Joshua -- Podolsky, Daniel K -- Hafler, David -- Murali, Mandakolathur -- Sands, Bruce -- Stone, John H -- Gregersen, Peter K -- Pillai, Shiv -- AI 064930/AI/NIAID NIH HHS/ -- AI 068759/AI/NIAID NIH HHS/ -- AI 076505/AI/NIAID NIH HHS/ -- AR 022263/AR/NIAMS NIH HHS/ -- AR 044422/AR/NIAMS NIH HHS/ -- AR 058481/AR/NIAMS NIH HHS/ -- NS 32765/NS/NINDS NIH HHS/ -- P30 DK043351/DK/NIDDK NIH HHS/ -- R01 AI064930/AI/NIAID NIH HHS/ -- R01 AI064930-04/AI/NIAID NIH HHS/ -- R01 AI068759/AI/NIAID NIH HHS/ -- R01 AI068759-05/AI/NIAID NIH HHS/ -- R01 AI076505/AI/NIAID NIH HHS/ -- R01 AI076505-02/AI/NIAID NIH HHS/ -- R01 AR044422/AR/NIAMS NIH HHS/ -- R01 AR044422-13/AR/NIAMS NIH HHS/ -- RC1 AR058481/AR/NIAMS NIH HHS/ -- RC1 AR058481-01/AR/NIAMS NIH HHS/ -- England -- Nature. 2010 Jul 8;466(7303):243-7. doi: 10.1038/nature09115. Epub 2010 Jun 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Center, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20555325" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Acetylesterase/*genetics/metabolism/secretion ; Alleles ; Animals ; Antibodies, Antinuclear/blood ; Arthritis, Rheumatoid/enzymology/genetics ; Autoimmune Diseases/*enzymology/*genetics ; Autoimmunity/*genetics ; B-Lymphocytes/metabolism ; Biocatalysis ; Carboxylic Ester Hydrolases/*genetics/metabolism/secretion ; Case-Control Studies ; Cell Line ; Diabetes Mellitus, Type 1/enzymology/genetics ; Europe/ethnology ; Exons/genetics ; Genetic Predisposition to Disease/*genetics ; Germ-Line Mutation/*genetics ; Humans ; Mice ; N-Acetylneuraminic Acid/*metabolism ; Odds Ratio ; Polymorphism, Single Nucleotide/genetics ; Sample Size ; Sequence Analysis, DNA
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2011-02-25
    Description: Hutchinson-Gilford progeria syndrome (HGPS) is a rare and fatal human premature ageing disease, characterized by premature arteriosclerosis and degeneration of vascular smooth muscle cells (SMCs). HGPS is caused by a single point mutation in the lamin A (LMNA) gene, resulting in the generation of progerin, a truncated splicing mutant of lamin A. Accumulation of progerin leads to various ageing-associated nuclear defects including disorganization of nuclear lamina and loss of heterochromatin. Here we report the generation of induced pluripotent stem cells (iPSCs) from fibroblasts obtained from patients with HGPS. HGPS-iPSCs show absence of progerin, and more importantly, lack the nuclear envelope and epigenetic alterations normally associated with premature ageing. Upon differentiation of HGPS-iPSCs, progerin and its ageing-associated phenotypic consequences are restored. Specifically, directed differentiation of HGPS-iPSCs to SMCs leads to the appearance of premature senescence phenotypes associated with vascular ageing. Additionally, our studies identify DNA-dependent protein kinase catalytic subunit (DNAPKcs, also known as PRKDC) as a downstream target of progerin. The absence of nuclear DNAPK holoenzyme correlates with premature as well as physiological ageing. Because progerin also accumulates during physiological ageing, our results provide an in vitro iPSC-based model to study the pathogenesis of human premature and physiological vascular ageing.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3088088/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3088088/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Guang-Hui -- Barkho, Basam Z -- Ruiz, Sergio -- Diep, Dinh -- Qu, Jing -- Yang, Sheng-Lian -- Panopoulos, Athanasia D -- Suzuki, Keiichiro -- Kurian, Leo -- Walsh, Christopher -- Thompson, James -- Boue, Stephanie -- Fung, Ho Lim -- Sancho-Martinez, Ignacio -- Zhang, Kun -- Yates, John 3rd -- Izpisua Belmonte, Juan Carlos -- P41 RR011823/RR/NCRR NIH HHS/ -- R01 DA025779/DA/NIDA NIH HHS/ -- R01 DA025779-01/DA/NIDA NIH HHS/ -- R01-DA025779/DA/NIDA NIH HHS/ -- T32 CA009370/CA/NCI NIH HHS/ -- T32 CA009370-25A1/CA/NCI NIH HHS/ -- England -- Nature. 2011 Apr 14;472(7342):221-5. doi: 10.1038/nature09879. Epub 2011 Feb 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gene Expression Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, California 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21346760" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/metabolism/pathology/physiology ; Aging, Premature/genetics/pathology/physiopathology ; Calcium-Binding Proteins/analysis ; Cell Aging ; Cell Differentiation ; Cell Line ; Cellular Reprogramming ; DNA-Activated Protein Kinase/metabolism ; Epigenesis, Genetic ; Fibroblasts/pathology ; Holoenzymes/metabolism ; Humans ; Induced Pluripotent Stem Cells/metabolism/*pathology ; Lamin Type A ; Microfilament Proteins/analysis ; Models, Biological ; Muscle, Smooth, Vascular/pathology ; Nuclear Envelope/pathology ; Nuclear Proteins/analysis/genetics/metabolism ; Phenotype ; Progeria/genetics/pathology/physiopathology ; Protein Precursors/analysis/genetics/metabolism ; Substrate Specificity
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  • 9
    Publication Date: 2012-10-19
    Description: Nuclear-architecture defects have been shown to correlate with the manifestation of a number of human diseases as well as ageing. It is therefore plausible that diseases whose manifestations correlate with ageing might be connected to the appearance of nuclear aberrations over time. We decided to evaluate nuclear organization in the context of ageing-associated disorders by focusing on a leucine-rich repeat kinase 2 (LRRK2) dominant mutation (G2019S; glycine-to-serine substitution at amino acid 2019), which is associated with familial and sporadic Parkinson's disease as well as impairment of adult neurogenesis in mice. Here we report on the generation of induced pluripotent stem cells (iPSCs) derived from Parkinson's disease patients and the implications of LRRK2(G2019S) mutation in human neural-stem-cell (NSC) populations. Mutant NSCs showed increased susceptibility to proteasomal stress as well as passage-dependent deficiencies in nuclear-envelope organization, clonal expansion and neuronal differentiation. Disease phenotypes were rescued by targeted correction of the LRRK2(G2019S) mutation with its wild-type counterpart in Parkinson's disease iPSCs and were recapitulated after targeted knock-in of the LRRK2(G2019S) mutation in human embryonic stem cells. Analysis of human brain tissue showed nuclear-envelope impairment in clinically diagnosed Parkinson's disease patients. Together, our results identify the nucleus as a previously unknown cellular organelle in Parkinson's disease pathology and may help to open new avenues for Parkinson's disease diagnoses as well as for the potential development of therapeutics targeting this fundamental cell structure.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3504651/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3504651/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Guang-Hui -- Qu, Jing -- Suzuki, Keiichiro -- Nivet, Emmanuel -- Li, Mo -- Montserrat, Nuria -- Yi, Fei -- Xu, Xiuling -- Ruiz, Sergio -- Zhang, Weiqi -- Wagner, Ulrich -- Kim, Audrey -- Ren, Bing -- Li, Ying -- Goebl, April -- Kim, Jessica -- Soligalla, Rupa Devi -- Dubova, Ilir -- Thompson, James -- Yates, John 3rd -- Esteban, Concepcion Rodriguez -- Sancho-Martinez, Ignacio -- Izpisua Belmonte, Juan Carlos -- ES017166/ES/NIEHS NIH HHS/ -- GTB07001/Telethon/Italy -- P41 RR011823/RR/NCRR NIH HHS/ -- U01 ES017166/ES/NIEHS NIH HHS/ -- England -- Nature. 2012 Nov 22;491(7425):603-7. doi: 10.1038/nature11557. Epub 2012 Oct 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China. ghliu@ibp.ac.cn〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23075850" target="_blank"〉PubMed〈/a〉
    Keywords: Apoptosis ; Cell Differentiation ; Cell Division ; Cell Line ; Clone Cells/metabolism/pathology ; Embryonic Stem Cells/metabolism/pathology ; Gene Knock-In Techniques ; Humans ; Induced Pluripotent Stem Cells/metabolism/pathology ; Mutant Proteins/genetics/*metabolism ; Mutation ; Neural Stem Cells/metabolism/*pathology ; Nuclear Envelope/genetics/pathology ; Parkinson Disease/*pathology ; Proteasome Endopeptidase Complex/metabolism ; Protein-Serine-Threonine Kinases/*genetics/*metabolism ; Stress, Physiological
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    Electronic ISSN: 1476-4687
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  • 10
    Publication Date: 2014-06-17
    Description: Author(s): H. M. Jia, C. J. Lin, F. Yang, X. X. Xu, H. Q. Zhang, Z. H. Liu, Z. D. Wu, L. Yang, N. R. Ma, P. F. Bao, and L. J. Sun The effect of the positive Q-value neutron transfer (PQNT) channels on the subbarrier fusion process is still far from a clear understanding and hence is worth further investigation. To this end, we have measured the fusion excitation function for S32+Zr94 at energies near and below the Coulomb barr... [Phys. Rev. C 89, 064605] Published Mon Jun 16, 2014
    Keywords: Nuclear Reactions
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    Topics: Physics
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