451
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Qin W, Yang T, Ho L, Zhao Z, Wang J, Chen L, Zhao W, Thiyagarajan M, MacGrogan D, Rodgers JT, Puigserver P, Sadoshima J, Deng H, Pedrini S, Gandy S, Sauve AA, Pasinetti GM. Neuronal SIRT1 Activation as a Novel Mechanism Underlying the Prevention of Alzheimer Disease Amyloid Neuropathology by Calorie Restriction. J Biol Chem 2006; 281:21745-21754. [PMID: 16751189 DOI: 10.1074/jbc.m602909200] [Citation(s) in RCA: 472] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Nicotinamide adenine dinucleotide (NAD)+-dependent sirtuins have been identified to be key regulators in the lifespan extending effects of calorie restriction (CR) in a number of species. In this study we report for the first time that promotion of the NAD+-dependent sirtuin, SIRT1-mediated deacetylase activity, may be a mechanism by which CR influences Alzheimer disease (AD)-type amyloid neuropathology. Most importantly, we report that the predicted attenuation of beta-amyloid content in the brain during CR can be reproduced in mouse neurons in vitro by manipulating cellular SIRT1 expression/activity through mechanisms involving the regulation of the serine/threonine Rho kinase ROCK1, known in part for its role in the inhibition of the non-amyloidogenic alpha-secretase processing of the amyloid precursor protein. Conversely, we found that the expression of constitutively active ROCK1 in vitro cultures significantly prevented SIRT1-mediated response, suggesting that alpha-secretase activity is required for SIRT1-mediated prevention of AD-type amyloid neuropathology. Consistently we found that the expression of exogenous human (h) SIRT1 in the brain of hSIRT1 transgenics also resulted in decreased ROCK1 expression and elevated alpha-secretase activity in vivo. These results demonstrate for the first time a role for SIRT1 activation in the brain as a novel mechanism through which CR may influence AD amyloid neuropathology. The study provides a potentially novel pharmacological strategy for AD prevention and/or treatment.
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Affiliation(s)
- Weiping Qin
- Department of Psychiatry, Mount Sinai School of Medicine, New York, New York 10029
| | - Tianle Yang
- Department of Pharmacology, Tri-Institutional Program in Chemical Biology, Weill Medical College of Cornell University, New York, New York 10021
| | - Lap Ho
- Department of Psychiatry, Mount Sinai School of Medicine, New York, New York 10029; Department of Neuroscience, Mount Sinai School of Medicine, New York, New York 10029; Geriatric Research and Clinical Center, Bronx Veterans Affairs Medical Center, Bronx, New York 10468
| | - Zhong Zhao
- Department of Psychiatry, Mount Sinai School of Medicine, New York, New York 10029
| | - Jun Wang
- Department of Psychiatry, Mount Sinai School of Medicine, New York, New York 10029
| | - Linghong Chen
- Department of Psychiatry, Mount Sinai School of Medicine, New York, New York 10029
| | - Wei Zhao
- Department of Psychiatry, Mount Sinai School of Medicine, New York, New York 10029
| | | | - Donal MacGrogan
- Department of Psychiatry, Mount Sinai School of Medicine, New York, New York 10029
| | - Joseph T Rodgers
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205
| | - Pere Puigserver
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205
| | - Junichi Sadoshima
- Cardiovascular Research Institute, University of Medicine and Dentistry of New Jersey, New Jersey Medical School, Newark, New Jersey 07103
| | - Haiteng Deng
- Proteomics Resource Center, The Rockefeller University, New York, New York 10021
| | - Steven Pedrini
- Farber Institute for Neurosciences, Thomas Jefferson University, Philadelphia, Pennsylvania 19107-5099
| | - Samuel Gandy
- Farber Institute for Neurosciences, Thomas Jefferson University, Philadelphia, Pennsylvania 19107-5099
| | - Anthony A Sauve
- Department of Pharmacology, Tri-Institutional Program in Chemical Biology, Weill Medical College of Cornell University, New York, New York 10021.
| | - Giulio M Pasinetti
- Department of Psychiatry, Mount Sinai School of Medicine, New York, New York 10029; Department of Neuroscience, Mount Sinai School of Medicine, New York, New York 10029; Geriatric Research and Clinical Center, Bronx Veterans Affairs Medical Center, Bronx, New York 10468.
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452
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453
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Tryggestad E, Armour E, Deng H, Ford E, Huang J, Iordachita I, Kazanzides P, Kennedy C, McNutt T, Verhaegen F, Wong J. WE-D-330A-08: The Small-Animal Radiation Research Platform (SARRP): Commissioning a 225 KVp “small-Field” X-Ray Source for Monte Carlo-Based Treatment Planning. Med Phys 2006. [DOI: 10.1118/1.2241749] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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454
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Deng H, Kennedy C, Armour E, McNutt T, Tryggestad E, Ford E, Iordachita I, Kazanzides P, Huang J, Wong J. WE-D-330A-07: The Small-Animal Radiation Research Platform (SARRP): Focused Pencil Beam Dosimetry. Med Phys 2006. [DOI: 10.1118/1.2241748] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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455
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Deng H, Ye ZH, Wong MH. Lead and zinc accumulation and tolerance in populations of six wetland plants. Environ Pollut 2006; 141:69-80. [PMID: 16214279 DOI: 10.1016/j.envpol.2005.08.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2005] [Accepted: 08/05/2005] [Indexed: 05/04/2023]
Abstract
Wetland plants such as Typha latifolia and Phragmites australis have been indicated to show a lack of evolution of metal tolerance in metal-contaminated populations. The aim of the present study is to verify whether other common wetland plants such as Alternanthera philoxeroides and Beckmannia syzigachne, also possess the same characteristics. Lead and zinc tolerances in populations of six species collected from contaminated and clean sites were examined by hydroponics. In general, the contaminated populations did not show higher metal tolerance and accumulation than the controls. Similar growth responses and tolerance indices in the same metal treatment solution between contaminated and control populations suggest that metal tolerance in wetland plants are generally not further evolved by contaminated environment. The reasons may be related to the special root anatomy in wetland plants, the alleviated metal toxicity by the reduced rooting conditions and the relatively high innate metal tolerance in some species.
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Affiliation(s)
- H Deng
- Biology Department and Croucher Institute for Environmental Sciences, Hong Kong Baptist University, Kowloon, Hong Kong SAR, PR China
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456
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Janzen CJ, Fernandez JP, Deng H, Diaz R, Hake SB, Cross GAM. Unusual histone modifications inTrypanosoma brucei. FEBS Lett 2006; 580:2306-10. [PMID: 16580668 DOI: 10.1016/j.febslet.2006.03.044] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2006] [Revised: 03/01/2006] [Accepted: 03/12/2006] [Indexed: 10/24/2022]
Abstract
To start to understand the role of chromatin structure in regulating transcription in trypanosomes, we analyzed covalent modifications on the four core histones of Trypanosoma brucei. We found unusually few modifications in the N-terminal tails, which are abundantly modified in other organisms and whose sequences, but not composition, are highly divergent in trypanosomes. In contrast, the C-terminal region of H2A appears to be hyper-acetylated. Surprisingly, the N-terminal alanines of H2A, H2B, and H4, were mono-methylated, a modification that has not been described previously for histones. Possible functions and evolutionary explanations for these unusual histone modifications are discussed.
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Affiliation(s)
- Christian J Janzen
- Laboratory of Molecular Parasitology, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA
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457
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Li D, Hayden EY, Panda K, Stuehr DJ, Deng H, Rousseau DL, Yeh SR. Regulation of the monomer-dimer equilibrium in inducible nitric-oxide synthase by nitric oxide. J Biol Chem 2006; 281:8197-204. [PMID: 16421101 DOI: 10.1074/jbc.m507328200] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The oxygenase domain of inducible nitric-oxide synthase exists as a functional tight homodimer in the presence of the substrate L-arginine and the cofactor tetrahydrobiopterin (H4B). In the absence of H4B, the enzyme is a mixture of monomer and loose dimer. We show that exposure of H4B-free enzyme to NO induces dissociation of the loose dimer into monomers in a reaction that follows single exponential decay kinetics with a lifetime of approximately 300 min. It is followed by a faster autoreduction reaction of the heme iron with a lifetime of approximately 30 min and the concurrent breakage of the proximal iron-thiolate bond, forming a five-coordinate NO-bound ferrous species. Mass spectrometry revealed that the NO-induced monomerization is associated with intramolecular disulfide bond formation between Cys104 and Cys109, located in the zinc-binding motif. The regulatory effect of NO as a dimer inhibitor is discussed in the context of the structure/function relationships of this enzyme.
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Affiliation(s)
- David Li
- Department of Physiology and Biophysics, Albert Einstein College of Medicine of Yeshiva University, Bronx, New York 10461, USA
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458
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Wong J, Armour E, Huang J, Deng H, Kennedy C, De Weese T. 196 Dosimetric commissioning of a platform for targeted irradiation of small laboratory animals. Radiother Oncol 2006. [DOI: 10.1016/s0167-8140(06)80673-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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459
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Pasinetti GM, Ungar LH, Lange DJ, Yemul S, Deng H, Yuan X, Brown RH, Cudkowicz ME, Newhall K, Peskind E, Marcus S, Ho L. Identification of potential CSF biomarkers in ALS. Neurology 2006; 66:1218-22. [PMID: 16481598 DOI: 10.1212/01.wnl.0000203129.82104.07] [Citation(s) in RCA: 162] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND The clinical diagnosis of ALS is based entirely on clinical features. Identification of biomarkers for ALS would be important for diagnosis and might also provide clues to pathogenesis. OBJECTIVE To determine if there is a specific protein profile in the CSF that distinguishes patients with ALS from those with purely motor peripheral neuropathy (PN) and healthy control subjects. METHODS CSF obtained from patients with ALS, disease controls (patients with other neurologic disorders), and normal controls were analyzed using the surface-enhanced laser desorption/ionization time-of-flight mass spectrometry proteomics technique. Biomarker sensitivity and specificity was calculated with receiver operating characteristic curve methodology. ALS biomarkers were purified and sequence identified by mass spectrometry-directed peptide sequencing. RESULTS In initial proteomic discovery studies, three protein species (4.8-, 6.7-, and 13.4-kDa) that were significantly lower in concentration in the CSF from patients with ALS (n = 36) than in normal controls (n = 21) were identified. A combination of three protein species (the "three-protein" model) correctly identified patients with ALS with 95% accuracy, 91% sensitivity, and 97% specificity from the controls. Independent validation studies using separate cohorts of ALS (n = 13), healthy control (n = 25), and PN (n = 7) subjects confirmed the ability of the three CSF protein species to separate patients with ALS from other diseases. Protein sequence analysis identified the 13.4-kDa protein species as cystatin C and the 4.8-kDa protein species as a peptic fragment of the neurosecretory protein VGF. CONCLUSION Additional application of a "three-protein" biomarker model to current diagnostic criteria may provide an objective biomarker pattern to help identify patients with ALS.
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Affiliation(s)
- G M Pasinetti
- Geriatric Research, Education, and Clinical Center, Bronx Veterans Affairs Medical Center, Bronx, NY, USA.
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460
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Deng H. Characterization of the reaction products of cytochrome c with glutathione by mass spectrometry. Biochem Biophys Res Commun 2006; 342:73-80. [PMID: 16480683 DOI: 10.1016/j.bbrc.2006.01.108] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2005] [Accepted: 01/24/2006] [Indexed: 12/01/2022]
Abstract
Cytochrome c and glutathione (GSH) are two important biomolecules that regulate many cellular processes. The reaction of cytochrome c with GSH involves radical oxygen species and exhibits significant complexity. In the present work, the reaction of cytochrome c with GSH in water was characterized using mass spectrometry. The results show for the first time that the reaction generates multiple products including apocytochrome c in oxidized and reduced forms, glutathionylated apocytochrome c, GSH-modified cytochrome c, and oxidized and hydroxylated species. The reaction is O(2) dependent and is rapid in water at neutral pH and 37 degrees C. The reaction involves the cleavage of thioether linkages between the heme and apocytochrome c. Evidence for the role of H(2)O(2) and other oxygen radicals in this reaction is also provided.
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Affiliation(s)
- Haiteng Deng
- The Proteomics Resource Center, The Rockefeller University, New York, NY 10021, USA.
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461
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Abstract
Defective mitotic spindles or an impaired spindle-kinetochore interaction activates the spindle checkpoint. We have previously shown that BubR1 haplo-insufficiency results in enhanced genomic instability and tumorigenesis in mice. Here we report that BubR1 deficiency also leads to a compromised response to DNA damage. Following treatment with doxorubicin, BubR1(+/-) murine fibroblast cells (MEF) were defective in undergoing G(2)/M arrest. Thus, whereas in the presence of DNA damage BubR1(+/+) MEF cells remained arrested in mitosis, BubR1(+/-) MEFs rapidly exited from mitosis and divided. The impaired mitotic arrest of BubR1(+/-) MEFs was associated with low levels of phospho-histone H2AX, p53, and p21 after DNA damage caused by treatment with both doxorubicin and ultraviolet light (UV). The impaired expression of p53 and p21 was also confirmed in human cell lines with BubR1 knockdown via RNA interference. Affinity pull-down coupled with mass spectrometry identified Poly(ADP-ribose) polymerase 1 (PARP-1) as one of the proteins interacting with BubR1. Reciprocal co-immunoprecipitation analysis confirmed the physical interaction between BubR1 and PARP-1. Our further study revealed that the ability of retaining intact PARP-1 or its cleavage product p89 was compromised in BubR1(+/-) MEFs upon treatment with doxorubicin or UV. Given that PARP-1 mediates DNA damage responses and regulates the activity of p53, our studies suggest that there exists a cross-talk between the spindle checkpoint and the DNA damage checkpoint and that BubR1 may play an important role in mediating the cross-talk.
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Affiliation(s)
- Y Fang
- Division of Molecular Carcinogenesis, New York Medical College, Valhalla, NY 10595, USA
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462
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Abstract
In the present study, reactions of sodium nitrite with proteins/peptides were characterized with mass spectrometry. The reaction generates two major products: replacement of the amino group by a hydroxyl group and formation of an alkene derivative by loss of a NH3 group at the N-terminus and the side chain of lysine residues of proteins/peptides. The reaction proceeds rapidly in weak acidic solution and at 37 degrees C in the presence of a millimolar concentration of nitrite, demonstrating that nitrite induces nitrosative deamination in proteins and peptides. The facile nitrite-induced modification of amino groups of protein/peptides changes the chemical nature of proteins and may have various applications in peptide synthesis, analytical chemistry, and protein engineering. It also provides information to enhance our understanding of functions of nitrite ions in biology and food preservation.
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Affiliation(s)
- Haiteng Deng
- The Proteomics Resource Center, The Rockefeller University, New York, NY 10021, USA.
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463
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Affiliation(s)
- H Deng
- Department of Neurology, Baylor College of Medicine, Houston, TX 77030, USA
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464
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Abstract
OBJECTIVE To determine whether the G309D and W437OPA mutations in PINK1 gene are present in American Caucasian population of patients with Parkinson's disease (PD). METHODS We searched for the G309D and W437OPA mutation by sequencing the regions of interest in the PINK1 gene in 237 unrelated Caucasian patients. RESULTS None of the 237 samples showed the G309D or W437OPA mutations. CONCLUSIONS The G309D and W437OPA mutations in PINK1 gene probably do not represent common causes of familial or sporadic PD in a Caucasian population.
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Affiliation(s)
- H Deng
- Department of Neurology, Parkinson's Disease Center and Movement Disorders Clinic, Baylor College of Medicine, Houston, TX 77030, USA
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465
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Aburel PS, Aigbirhio F, Alexakis E, Audrain H, Austin CA, Barry C, Bender D, Bushby N, Cable K, Carroll MA, Deng H, Ellames G, Fellows I, Gardiner JM, Geach NJ, Gee AD, Gerhard M, Guthrie EJ, Hamprecht DW, Harding JR, Hartley RC, Harwood SJ, Herbert JM, Hickey MJ, Jones JR, Kamara LM, Kingston LP, Lawrie KWM, Lewis RJ, Lockhart A, Lockley WJS, Macritchie J, MacGlinchey R, Macleod C, Martarello L, Mather AN, Matthews JC, McAuley BM, McKiernan GJ, McNeill A, Murrell V, O'Hagan D, Oldfield MF, Panchal N, Passchier J, Pike VW, Roberts CF, Rustidge DC, Smith T, Stimpson W, Taylor K, Widdowson DA, Willis CL, Wilkinson DJ, Wilson I, Zinsser W, O'Hagan D, Deng H, Martarello L, Gee AD, Lockhart A, MacGlinchey R, Carroll MA, Kamara LM, Widdowson DA, Pike VW, Gardiner JM, Panchal N, Stimpson W, Herbert JM, Ellames G, Alexakis E, Hickey MJ, Kingston LP, Jones JR, Lockley WJS, Mather AN, McAuley BM, Smith T, Wilkinson DJ, Rustidge DC, Geach NJ, Oldfield MF, Guthrie EJ, Macleod C, McKiernan GJ, Roberts CF, Austin CA, Macritchie J, Hamprecht DW, Hartley RC, Wilson I, Harwood SJ, Herbert JM, Barry C, Bushby N, Harding J, Willis C, Alexakis E, Jones JR, Lockley WJS, Lockley WJS, Lewis RJ, Wilkinson DJ, Jones JR, Harwood SJ, Gerhard M, Zinsser W, Lawrie KWM, Martarello L, Gee AD, Hélène Audrain, Aburel PS, Bender D, McNeill A, Murrell V, Taylor K, Stimpson W, Panchal N, Gardiner JM, Herbert JM, Ellames GJ, Passchier J, Bender D, Lawrie KWM, Fellows I, Matthews JC, Gee AD. 14th International Isotope Society (UK group) symposium. J Labelled Comp Radiopharm 2005. [DOI: 10.1002/jlcr.948] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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466
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Deng H, Ye ZH, Wong MH. Accumulation of lead, zinc, copper and cadmium by 12 wetland plant species thriving in metal-contaminated sites in China. Environ Pollut 2004; 132:29-40. [PMID: 15276271 DOI: 10.1016/j.envpol.2004.03.030] [Citation(s) in RCA: 260] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2003] [Accepted: 03/29/2004] [Indexed: 05/22/2023]
Abstract
The concentrations of lead, zinc, copper and cadmium accumulated by 12 emergent-rooted wetland plant species including different populations of Leersia hexandra, Juncus effusus and Equisetum ramosisti were investigated in field conditions of China. The results showed that metal accumulation by wetland plants differed among species, populations and tissues. Populations grown in substrata with elevated metals contained significantly higher metals in plants. Metals accumulated by wetland plants were mostly distributed in root tissues, suggesting that an exclusion strategy for metal tolerance widely exists in them. That some species/populations could accumulate relatively high metal concentrations (far above the toxic concentration to plants) in their shoots indicates that internal detoxification metal tolerance mechanism(s) are also included. The factors affecting metal accumulation by wetland plants include metal concentrations, pH, and nutrient status in substrata. Mostly concentrations of Pb and Cu in both aboveground and underground tissues of the plants were significantly positively related to their total and/or DTPA-extractable fractions in substrata while negatively to soil N and P, respectively. The potential use of these wetland plants in phytoremediation is also discussed.
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Affiliation(s)
- H Deng
- Croucher Institute for Environmental Sciences, Hong Kong Baptist University, Hong Kong SAR, PR China
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467
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Zheng K, Deng H, Liu X, Li H, Chao H, Ji L. Electronic structures, DNA-binding and related properties of complexes [Ru(bpy)2L]2+ (L=ip, pip, hpip). ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.theochem.2004.05.026] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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468
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Wu LQ, Yang YF, Zheng D, Deng H, Pan Q, Zhao TL, Cai F, Feng Y, Long ZG, Dai HP, Tang BS, Yang YJ, Deng HX, Xia K, Xia JH. Confirmation and refinement of a genetic locus for disseminated superficial actinic porokeratosis (DSAP1) at 12q23.2-24.1. Br J Dermatol 2004; 150:999-1004. [PMID: 15149516 DOI: 10.1111/j.1365-2133.2004.05912.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Our previous study has identified two loci for disseminated superficial actinic porokeratosis (DSAP), but the genes responsible are still unknown. OBJECTIVES To narrow down the candidate regions and to assess candidate genes. METHODS A genome-wide scan and linkage analysis were carried out in a newly collected five-generation Chinese family with DSAP. In addition, six candidate genes were screened for possible DSAP-associated mutations. RESULTS DSAP in this family was associated with chromosome 12q. Fine mapping and haplotype construction refined the DSAP1 locus to a 4.4-cM interval. No disease-associated mutation was detected in CRY1, C4ST1, TXNRD1, HCF2, CMKLR1 or KIAA0789 genes. CONCLUSIONS The DSAP1 locus was localized to a 4.4-cM interval at chromosome 12q23.2-24.1. CRY1, C4ST1, TXNRD1, HCF2, CMKLR1 and KIAA0789 genes were not associated with DSAP1.
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Affiliation(s)
- L Q Wu
- National Laboratory of Medical Genetics, Xiangya Second Hospital, Central South University, Changsha, Hunan 410078, China
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469
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470
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Bennett GW, Bousquet B, Brown HN, Bunce G, Carey RM, Cushman P, Danby GT, Debevec PT, Deile M, Deng H, Dhawan SK, Druzhinin VP, Duong L, Farley FJM, Fedotovich GV, Gray FE, Grigoriev D, Grosse-Perdekamp M, Grossmann A, Hare MF, Hertzog DW, Huang X, Hughes VW, Iwasaki M, Jungmann K, Kawall D, Khazin BI, Krienen F, Kronkvist I, Lam A, Larsen R, Lee YY, Logashenko I, McNabb R, Meng W, Miller JP, Morse WM, Nikas D, Onderwater CJG, Orlov Y, Ozben CS, Paley JM, Peng Q, Polly CC, Pretz J, Prigl R, Zu Putlitz G, Qian T, Redin SI, Rind O, Roberts BL, Ryskulov N, Semertzidis YK, Shagin P, Shatunov YM, Sichtermann EP, Solodov E, Sossong M, Sulak LR, Trofimov A, von Walter P, Yamamoto A. Measurement of the negative muon anomalous magnetic moment to 0.7 ppm. Phys Rev Lett 2004; 92:161802. [PMID: 15169217 DOI: 10.1103/physrevlett.92.161802] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2004] [Indexed: 05/24/2023]
Abstract
The anomalous magnetic moment of the negative muon has been measured to a precision of 0.7 ppm (ppm) at the Brookhaven Alternating Gradient Synchrotron. This result is based on data collected in 2001, and is over an order of magnitude more precise than the previous measurement for the negative muon. The result a(mu(-))=11 659 214(8)(3) x 10(-10) (0.7 ppm), where the first uncertainty is statistical and the second is systematic, is consistent with previous measurements of the anomaly for the positive and the negative muon. The average of the measurements of the muon anomaly is a(mu)(exp)=11 659 208(6) x 10(-10) (0.5 ppm).
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Affiliation(s)
- G W Bennett
- Brookhaven National Laboratory, Upton, New York 11973, USA
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471
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Deng H, Tanojo H, Lenn J, Cuesico C. In vitro human skin study of combined application of pimecrolimus cream and betamethasone 17-valerate. J Am Acad Dermatol 2004. [DOI: 10.1016/j.jaad.2003.11.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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472
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Liu YZ, Xu FH, Shen H, Deng H, Liu YJ, Zhao LJ, Dvornyk V, Conway T, Li JL, Huang QY, Davies KM, Recker RR, Deng HW. Confirmation linkage study in support of the X chromosome harbouring a QTL underlying human height variation. J Med Genet 2004; 40:825-31. [PMID: 14627672 PMCID: PMC1735321 DOI: 10.1136/jmg.40.11.825] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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473
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Liu L, Deng H, Sun X, Zhao J, Li X. Crit Care 2004; 8:P142. [DOI: 10.1186/cc2609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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474
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Basu U, Si K, Deng H, Maitra U. Phosphorylation of mammalian eukaryotic translation initiation factor 6 and its Saccharomyces cerevisiae homologue Tif6p: evidence that phosphorylation of Tif6p regulates its nucleocytoplasmic distribution and is required for yeast cell growth. Mol Cell Biol 2003; 23:6187-99. [PMID: 12917340 PMCID: PMC180954 DOI: 10.1128/mcb.23.17.6187-6199.2003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2003] [Accepted: 06/06/2003] [Indexed: 11/20/2022] Open
Abstract
The synthesis of 60S ribosomal subunits in Saccharomyces cerevisiae requires Tif6p, the yeast homologue of mammalian eukaryotic translation initiation factor 6 (eIF6). In the present work, we have isolated a protein kinase from rabbit reticulocyte lysates on the basis of its ability to phosphorylate recombinant human eIF6. Mass spectrometric analysis as well as antigenic properties of the purified kinase identified it as casein kinase I. The site of in vitro phosphorylation, which is highly conserved from yeast to mammals, was identified as the serine residues at positions 174 (major site) and 175 (minor site). The homologous yeast protein Tif6p was also phosphorylated in vivo in yeast cells. Mutation of Tif6p at serine-174 to alanine reduced phosphorylation drastically and caused loss of cell growth and viability. When both Ser-174 and Ser-175 were mutated to alanine, phosphorylation of Tif6p was completely abolished. Furthermore, while wild-type Tif6p was distributed both in nuclei and the cytoplasm of yeast cells, the mutant Tif6p (with Ser174Ala and Ser175Ala) became a constitutively nuclear protein. These results suggest that phosphorylatable Ser-174 and Ser-175 play a critical role in the nuclear export of Tif6p.
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Affiliation(s)
- Uttiya Basu
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine of Yeshiva University, Bronx, New York 10461, USA
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475
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Petrache I, Birukov K, Zaiman AL, Crow MT, Deng H, Wadgaonkar R, Romer LH, Garcia JGN. Caspase-dependent cleavage of myosin light chain kinase (MLCK) is involved in TNF-alpha-mediated bovine pulmonary endothelial cell apoptosis. FASEB J 2003; 17:407-16. [PMID: 12631580 DOI: 10.1096/fj.02-0672com] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Cytoskeletal proteins are key participants in the cellular progression to apoptosis. Our previous work demonstrated the critical dependence of actomyosin rearrangement and MLC phosphorylation in TNF-alpha-induced endothelial cell apoptosis. As these events reflect the activation of the multifunctional endothelial cell (EC) MLCK isoform, we assessed the direct role of EC MLCK in the regulation of TNF-alpha-induced apoptosis. Bovine pulmonary artery endothelial cells expressing either an adenovirus encoding antisense MLCK cDNA (Ad.GFP-AS MLCK) or a dominant/negative EC MLCK construct (EC MLCK-ATPdel) resulted in marked reductions in MLCK activity and TNF-alpha-mediated apoptosis. In contrast, a constitutively active EC MLCK lacking the carboxyl-terminal autoinhibitory domains (EC MLCK-1745) markedly enhanced the apoptotic response to TNF-alpha. Immunostaining in GFP-EC MLCK-expressing cells revealed colocalization of caspase 8 and EC MLCK along actin stress fibers after TNF-alpha. TNF-alpha induced the caspase-dependent cleavage of EC MLCK-1745 in transfected endothelial cells, which was confirmed by mass spectroscopy with in vitro cleavage by caspase 3 at LKKD (D1703). The resulting MLCK fragments displayed significant calmodulin-independent kinase activity. These studies convincingly demonstrate that novel interactions between the apoptotic machinery and EC MLCK exist that regulate the endothelial contractile apparatus in TNF-alpha-induced apoptosis.
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Affiliation(s)
- Irina Petrache
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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476
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Rajeevan H, Osier MV, Cheung KH, Deng H, Druskin L, Heinzen R, Kidd JR, Stein S, Pakstis AJ, Tosches NP, Yeh CC, Miller PL, Kidd KK. ALFRED: the ALelle FREquency Database. Update. Nucleic Acids Res 2003; 31:270-1. [PMID: 12519999 PMCID: PMC165490 DOI: 10.1093/nar/gkg043] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Elaboration of ALFRED (http://alfred.med.yale.edu) is being continued in two directions. One of which is developing tools for efficiently annotating the entries and checking the integrity of the data already in the database while the other is to increase the quantity and accessibility of data. Information contained in ALFRED such as, polymorphic sites, number of populations and frequency tables (one sample typed for one site) has significantly increased.
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Affiliation(s)
- H Rajeevan
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06520-8005, USA
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477
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Huang T, Deng H, Wolkoff AW, Stockert RJ. Phosphorylation-dependent interaction of the asialoglycoprotein receptor with molecular chaperones. J Biol Chem 2002; 277:37798-803. [PMID: 12167617 DOI: 10.1074/jbc.m204786200] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
A membrane protein trafficking mutant (Trf1) of HuH-7 alters the asialoglycoprotein (ASGPR) and transferrin receptor subcellular distribution. Expression cloning of a cDNA complementing the trf1 mutation led to the discovery of a novel casein Kinase 2 catalytic subunit (CK2alpha"). To purify potential CK2alpha" phosphorylation-dependent sorting proteins from cytosol, the ASGPR cytoplasmic domain was expressed as a GST fusion protein and immobilized on glutathione-agarose. In the absence of phosphorylation, only trace amounts of cytosol protein were bound and eluted. When the fusion protein was phosphorylated, a heterocomplex of potential sorting proteins was recovered. Mass spectrometer and immunoblot analysis identified five of these proteins as gp96, HSP70, HSP90, cyclophilin-A, and FKBP18. Treatment of HuH-7 with rapamycin to disrupt the heterocomplex reduced surface ASGPR binding activity by 65 +/- 5.7%. In Trf1 cells, surface-binding activity was 48 +/- 7% of that in HuH-7 and was not further reduced by rapamycin treatment. Immunoanalysis showed significantly fewer surface receptors on rapamycin-treated HuH7 cells than on nontreated cells, with no affect on the level of surface receptors in Trf1 cells. The data presented provide evidence that phosphorylation of the ASGPR cytoplasmic domain is required for the binding of specific molecular chaperones with the potential to regulate receptor trafficking.
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Affiliation(s)
- Tianmin Huang
- Marion Bessin Liver Research Center and the Departments of Medicine and Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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478
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Xia K, Deng H, Xia JH, Zheng D, Zhang HL, Lu CY, Li CQ, Pan Q, Dai HP, Yang YF, Long ZG, Deng HX. A novel locus (DSAP2) for disseminated superficial actinic porokeratosis maps to chromosome 15q25.1-26.1. Br J Dermatol 2002; 147:650-4. [PMID: 12366408 DOI: 10.1046/j.1365-2133.2002.05058.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Disseminated superficial actinic porokeratosis (DSAP) is a chronic cutaneous disorder characterized by multiple superficial keratotic lesions surrounded by a slightly raised keratotic border. It develops in teenagers in sun-exposed areas of skin and usually follows an autosomal dominant inheritance pattern. The first locus for DSAP was localized to chromosome 12q23.2-24.1, but no gene responsible for porokeratosis has been identified to date. OBJECTIVES To determine whether DSAP is a genetically heterogeneous disorder and to identify the disease gene locus in a three-generation Chinese family with DSAP. METHODS Genetic linkage analysis was carried out in this family using 15 microsatellite markers between D12S1671 and D12S369 on chromosome 12q, followed by a genome-wide scan with 382 microsatellite markers from the autosomes. RESULTS Genetic linkage analysis with chromosome 12q markers suggested that the locus in this family is not linked to chromosome 12q. A genome-wide scan and fine mapping finally localized the locus for DSAP in this family to a 6.4-cM region between markers D15S1023 and D15S1030 at chromosome 15q25.1-26.1. This DSAP locus was named DSAP2. CONCLUSIONS The previous results and this study have shown that DSAP is a genetically heterogeneous disorder; a novel locus for DSAP, termed DSAP2, was mapped to a 6.4-cM region between markers D15S1023 and D15S1030.
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Affiliation(s)
- K Xia
- National Laboratory of Medical Genetics, Department of Dermatology, Xiangya Hospital, Changsha, Hunan 410078, China.
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479
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Li S, Zhang B, Deng H. [Momordica charantia proteins against coxsackievirus B3 infection in vitro]. Hunan Yi Ke Da Xue Xue Bao 2002; 24:583-4. [PMID: 12080730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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480
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Deng JK, Li GQ, Wang XD, Huang JD, Deng H, Ning CG, Wang Y, Zheng Y. Orbital electron densities of ethane: Comparison of electron momentum spectroscopy measurements with near Hartree–Fock limit and density functional theory calculations. J Chem Phys 2002. [DOI: 10.1063/1.1498816] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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481
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Bennett GW, Bousquet B, Brown HN, Bunce G, Carey RM, Cushman P, Danby GT, Debevec PT, Deile M, Deng H, Deninger W, Dhawan SK, Druzhinin VP, Duong L, Efstathiadis E, Farley FJM, Fedotovich GV, Giron S, Gray FE, Grigoriev D, Grosse-Perdekamp M, Grossmann A, Hare MF, Hertzog DW, Huang X, Hughes VW, Iwasaki M, Jungmann K, Kawall D, Khazin BI, Kindem J, Krienen F, Kronkvist I, Lam A, Larsen R, Lee YY, Logashenko I, McNabb R, Meng W, Mi J, Miller JP, Morse WM, Nikas D, Onderwater CJG, Orlov Y, Ozben CS, Paley JM, Peng Q, Polly CC, Pretz J, Prigl R, Zu Putlitz G, Qian T, Redin SI, Rind O, Roberts BL, Ryskulov N, Shagin P, Semertzidis YK, Shatunov YM, Sichtermann EP, Solodov E, Sossong M, Steinmetz A, Sulak LR, Trofimov A, Urner D, Von Walter P, Warburton D, Yamamoto A. Measurement of the positive muon anomalous magnetic moment to 0.7 ppm. Phys Rev Lett 2002; 89:101804. [PMID: 12225185 DOI: 10.1103/physrevlett.89.101804] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2002] [Indexed: 05/23/2023]
Abstract
A higher precision measurement of the anomalous g value, a(mu)=(g-2)/2, for the positive muon has been made at the Brookhaven Alternating Gradient Synchrotron, based on data collected in the year 2000. The result a(mu(+))=11 659 204(7)(5)x10(-10) (0.7 ppm) is in good agreement with previous measurements and has an error about one-half that of the combined previous data. The present world average experimental value is a(mu)(expt)=11 659 203(8)x10(-10) (0.7 ppm).
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Affiliation(s)
- G W Bennett
- Brookhaven National Laboratory, Upton, New York 11973, USA
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482
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Abstract
Duck blastodermal cells isolated from Stage X embryos of Maya ducks were injected into subgerminal cavity of recipient Stage X chicken embryos treated with gamma-irradiation or untreated. Eleven somatic chimeras were obtained based on plumage color and were raised to sexual maturity. To test for germline chimerism, progeny tests were performed by mating the chimeras with Maya ducks. A total of 622 eggs was collected and incubated. Fertility rate and hatchability were 2.9% (18/622) and 1.0% (6/622), respectively. The six duck hatchlings were from Chimera 9801 and were considered to be derived from the germ cells developed from the donor Maya blastodermal cells, indicating that Chimera 9801 is a germline chimera.
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Affiliation(s)
- Z D Li
- Department of Biochemistry and Molecular Biology, China Agricultural University Beijing.
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483
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Xiao F, Wei Y, Yang L, Zhao X, Tian L, Ding Z, Yuan S, Lou Y, Liu F, Wen Y, Li J, Deng H, Kang B, Mao Y, Lei S, He Q, Su J, Lu Y, Niu T, Hou J, Huang MJ. A gene therapy for cancer based on the angiogenesis inhibitor, vasostatin. Gene Ther 2002; 9:1207-13. [PMID: 12215887 DOI: 10.1038/sj.gt.3301788] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2002] [Accepted: 04/19/2002] [Indexed: 11/08/2022]
Abstract
The growth and persistence of solid tumors and their metastasis are angiogenesis-dependent. Vasostatin, the N-terminal domain of calreticulin inclusive of amino acids 1-180, is a potent angiogenesis inhibitor. To investigate whether intramuscular administration of vasostatin gene has the antitumor activity in mouse tumor models, we constructed a plasmid DNA encoding vasostatin and a control vector. Production and secretion of vasostatin protein by COS cells transfected with the plasmid DNA encoding vasostatin (pSecTag2B-vaso) were confirmed by Western blot analysis and ELISA. Conditioned medium from vasostatin-transfected COS cells apparently inhibited human umbilical vein endothelial cell (HUVEC) and mouse endothelial cell (SVEC4-10) proliferation, compared with conditioned medium from the COS cells transfected with control vector or non-transfected cells. Treatment with pSecTag2B-vaso twice weekly for 4 weeks resulted in the inhibition of tumor growth and the prolongation of the survival of tumor-bearing mice. The sustained high level of vasostatin protein in serum could be identified in ELISA. Angiogenesis was apparently inhibited in tumor by immunohistochemical analysis. Angiogenesis was also inhibited in the chicken embryo CAM assay and mouse corneal micropocket assay. The increased apoptotic cells were found within the tumor tissues from the mice treated with plasmid DNA encoding vasostatin. Taken together, the data in the present study indicate that the cancer gene therapy by the intramuscular delivery of plasmid DNA encoding vasostatin, is effective in the inhibition of the systemic angiogenesis and tumor growth in murine models. The present findings also provide further evidence of the anti-tumor effects of the vasostatin, and may be of importance for the further exploration of the application of this molecule in the treatment of cancer.
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Affiliation(s)
- F Xiao
- Key Laboratory of Biotherapy of Human Diseases, Ministry of Education, PR China and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Sichuan, The People's Republic of China
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484
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Deng H, Zhou H, Sun M. [Roles of sex hormones and oxygen free radical in coronary heart disease]. Hunan Yi Ke Da Xue Xue Bao 2002; 24:343-6. [PMID: 12080642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
To examine the roles of sex hormones and oxygen free radical(OFR) in coronary heart disease (CHD), the serum estradiol(E2), testosterone(T), SOD, MDA and lipid levels were measured in 44 postmenopausal women with CHD and 22 health women. Mean levels of T and MDA were significantly higher while mean levels of SOD and E2 were significantly lower in CHD group than those in control group. On relative analysis, there was a positive correlation between E2 and SOD, while a negative correlation was observed between T and MDA in CHD group. Eighteen postmenopausal women with CHD had been receiving nilestriol replacement therapy for 12 weeks. The serum SOD and HDL-C/TC levels increased significantly, but LDL-C and MDA decreased significantly. The overall data suggest that OFR plays an important role in CHD; Low E2 levels is a risk factor of CHD in postmenopausal women; Nilestriol replacement therapy can improve the metabolism of serum lipids and inhibit lipid peroxidation, therefore, it may be of benefit to postmenopausal women with CHD.
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Affiliation(s)
- H Deng
- Department of Cardiovascular, Xiangya Hospital, Hunan Medical University, Changsha 410008
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485
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Kertesz V, Deng H, Asano K, Hettich R, Van Berkel G. N-Phenyl-1,4-Phenylenediamine and Benzidine Oxidation Products Identified Using On-Line Electrochemistry/Electrospray Fourier Transform Mass Spectrometry This manuscript has been authored by a contractor of the U.S. Government under contract No. DE-AC05-00OR22725. Accordingly, the U.S. Government retains a paid-up, nonexclusive, irrevocable, worldwide license to publish or reproduce the published form of this contribution, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, or allow others to do so, for U.S. Government purposes. ELECTROANAL 2002. [DOI: 10.1002/1521-4109(200208)14:14<1027::aid-elan1027>3.0.co;2-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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486
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Deng H, Huang L, Groesbeek M, Lugtenburg J, Callender RH. Vibrational Analysis of a Retinal Protonated Schiff Base Analog. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100069a002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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487
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Ray WJ, Crans DC, Zheng J, Burgner JW, Deng H, Mahroof-Tahir M. Structure of the Dimeric Ethylene Glycol-Vanadate Complex and Other 1,2-Diol-Vanadate Complexes in Aqueous Solution: Vanadate-Derived Transition-State Analog Complexes of Phosphotransferases. J Am Chem Soc 2002. [DOI: 10.1021/ja00127a015] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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488
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Tonge PJ, Carey PR, Callender R, Deng H, Ekiel I, Muhandiram DR. Characterization of trans- and cis-5-methylthienylacryloyl chymotrypsin using Raman difference spectroscopy, NMR, and kinetics: carbonyl environment and reactivity. J Am Chem Soc 2002. [DOI: 10.1021/ja00072a031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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489
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Abstract
Eukaryotic translation initiation factor 5 (eIF5) interacts with the 40S initiation complex (40S*eIF3*AUG*Met-tRNA(f)*eIF2*GTP) and, acting as a GTPase activating protein, promotes the hydrolysis of bound GTP. We isolated a protein kinase from rabbit reticulocyte lysates on the basis of its ability to phosphorylate purified bacterially expressed recombinant rat eIF5. Physical, biochemical and antigenic properties of this kinase identify it as casein kinase II (CK II). Mass spectrometric analysis of maximally in vitro phosphorylated eIF5 localized the major phosphorylation sites at Ser-387 and Ser-388 near the C-terminus of eIF5. These serine residues are embedded within a cluster of acidic amino acid residues and account for nearly 90% of the total in vitro eIF5 phosphorylation. A minor phosphorylation site at Ser-174 was also observed. Alanine substitution mutagenesis at Ser-387 and Ser-388 of eIF5 abolishes phosphorylation by the purified kinase as well as by crude reticulocyte lysates. The same mutations also abolish phosphorylation of eIF5 when transfected into mammalian cells suggesting that CK II phosphorylates eIF5 at these two serine residues in vivo as well.
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Affiliation(s)
- Romit Majumdar
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine of Yeshiva University, Jack and Pearl Resnick Campus, Bronx, NY 10461, USA
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490
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Deng HW, Livshits G, Yakovenko K, Xu FH, Conway T, Davies KM, Deng H, Recker RR. Evidence for a major gene for bone mineral density/content in human pedigrees identified via probands with extreme bone mineral density. Ann Hum Genet 2002; 66:61-74. [PMID: 12015001 DOI: 10.1017/s0003480001008958] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Bone mineral content (BMC) and/or bone mineral density (BMD, i.e. BMC scaled by bone size) are major determinants for osteoporosis, which is a serious health problem. The major determinant of variation in BMD/BMC is genetic. The few studies now available are inconsistent in the identification and/or even in the existence of major gene(s) for BMD/BMC. In 51 human pedigrees with 941 individuals (526 measured for phenotypes) identified via probands with extreme BMD values, we performed complex segregation analyses to test the existence of a genetic locus with a major effect on BMD/BMC variation. We analyzed BMD and BMC at the spine, hip and wrist jointly by employing, as the study phenotype, factor scores (FS) of the principle component that explains approximately 75% of the total BMD/BMC variation at the three sites. The results indicate that a major gene exists with a codominant effect that is responsible for approximately 16% of the FS variation when adjusted for significant effects of sex, body weight and age. A significant genotype-x-sex-x-age interaction was found, which may explain approximately 14% of the FS variation after adjusting for body weight. Testing of various models did not provide support for shared familial environmental effects but suggested the existence of residual polygenic effects, which may explain approximately 50% of the FS variation when adjusting for sex, body weight and age. This study indicates a promising aspect of studies to identify a major gene for BMD/BMC variation in our pedigrees identified via extreme probands.
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Affiliation(s)
- H W Deng
- Osteoporosis Research Center, Creighton University, Omaha, USA.
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491
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Aangelidaki I, Ahrin BK, Deng H, Schmidt JE. Anaerobic digestion of olive oil mill effluents together with swine manure in UASB reactors. Water Sci Technol 2002; 45:213-218. [PMID: 12188547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Combined anaerobic digestion of olive oil mill effluent (OME) with swine manure, was investigated. In batch experiments was shown that for anaerobic degradation of OME alone nitrogen addition was needed. A COD:N ratio in the range of 65:1 to 126:1 was necessary for the optimal degradation process. Furthermore, it was found that methane productions rates during digestion of either swine manure alone or OME alone were much lower than the rates achieved when OME and manure were digested together. Admixing OME with manure at a concentration of 5 to 10% OME resulted in the highest methane production rates. Using upflow anaerobic sludge blanket (UASB) reactors, it was shown that codigestion of OME with swine manure (up to 50% OME) was successful with a COD reduction up to 75%. The process was adapted for degradation of OME with stepwise increase of the OME load to the UASB reactor. The results showed that the high content of ammonia in swine manure, together with content of other nutrients, make it possible to degrade OME without addition of external alkalinity and without addition of external nitrogen source. Anaerobic treatment of OME in UASB reactors resulted in reduction of simple phenolic compounds such as mequinol, phenyl ethyl alcohol and ethyl methyl phenol. After anaerobic treatment the concentration of these compounds was reduced between 75 and 100%. However, the concentration of some degradation products such as methyl phenol and ethyl phenol were detected in significantly higher concentrations after treatment, indicating that the process has to be further optimised to achieve satisfactory removal of all xenobiotic compounds.
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Affiliation(s)
- I Aangelidaki
- Environment & Resources DTU, Technical University of Denmark, Lyngby
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492
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Zou XH, Li H, Yang G, Deng H, Liu J, Li RH, Zhang QL, Xiong Y, Ji LN. Synthesis, characterization, and crystal structure of a functionalized ruthenium(II) polypyridyl complex with fused triazinone as ligand. Inorg Chem 2001; 40:7091-5. [PMID: 11754296 DOI: 10.1021/ic001429u] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- X H Zou
- State Key Laboratory of Ultrafast Laser Spectroscopy/Department of Chemistry, Zhongshan University, Guangzhou, 510275, P.R. China
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493
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Abstract
R67 is a Type II dihydrofolate reductase (DHFR) that catalyzes the reduction of dihydrofolate (DHF) to tetrahydrofolate by facilitating the addition of a proton to N5 of DHF and the transfer of a hydride ion from NADPH to C6. Because this enzyme is a plasmid-encoded DHFR from trimethoprim-resistant bacteria, extensive studies on R67 with various methods have been performed to elucidate its reaction mechanism. Here, Raman difference measurements, conducted on the ternary complex of R67.NADP(+).DHF believed to be an accurate mimic of the productive DHFR.NADPH.DHF complex, show that the pK(a) of N5 in the complex is less than 4. This is in clear contrast to the behavior observed in Escherichia coli DHFR, a substantially more efficient enzyme, where the pK(a) of bound DHF at N5 is increased to 6.5 compared with its solution value of 2.6. A comparison of the ternary complexes in R67 and E. coli DHFRs suggests that enzymic raising of the pK(a) at N5 can significantly increase the catalytic efficiency of the hydride transfer step. However, R67 shows that even without such a strategy an effective DHFR can still be designed.
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Affiliation(s)
- H Deng
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA.
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494
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Sauve AA, Celic I, Avalos J, Deng H, Boeke JD, Schramm VL. Chemistry of gene silencing: the mechanism of NAD+-dependent deacetylation reactions. Biochemistry 2001; 40:15456-63. [PMID: 11747420 DOI: 10.1021/bi011858j] [Citation(s) in RCA: 246] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Sir2 enzyme family is responsible for a newly classified chemical reaction, NAD(+)-dependent protein deacetylation. New peptide substrates, the reaction mechanism, and the products of the acetyl transfer to NAD(+) are described for SIR2. The final products of SIR2 reactions are the deacetylated peptide and the 2' and 3' regioisomers of O-acetyl ADP ribose (AADPR), formed through an alpha-1'-acetyl ADP ribose intermediate and intramolecular transesterification reactions (2' --> 3'). The regioisomers, their anomeric forms, the interconversion rates, and the reaction equilibria were characterized by NMR, HPLC, 18O exchange, and MS methods. The mechanism of acetyl transfer to NAD(+) includes (1) ADP ribosylation of the peptide acyl oxygen to form a high-energy O-alkyl amidate intermediate, (2) attack of the 2'-OH group on the amidate to form a 1',2'-acyloxonium species, (3) hydrolysis to 2'-AADPR by the attack of water on the carbonyl carbon, and (4) an SIR2-independent transesterification equilibrating the 2'- and 3'-AADPRs. This mechanism is unprecedented in ADP-ribosyl transferase enzymology. The 2'- and 3'-AADPR products are candidate molecules for SIR2-initiated signaling pathways.
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Affiliation(s)
- A A Sauve
- Department of Biochemistry, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, New York 10461, USA
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495
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Fan J, Unoki H, Kojima N, Sun H, Shimoyamada H, Deng H, Okazaki M, Shikama H, Yamada N, Watanabe T. Overexpression of lipoprotein lipase in transgenic rabbits inhibits diet-induced hypercholesterolemia and atherosclerosis. J Biol Chem 2001; 276:40071-9. [PMID: 11477088 DOI: 10.1074/jbc.m105456200] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Lipoprotein lipase (LPL) is a key enzyme in the hydrolysis of TG-rich lipoproteins. To elucidate the physiological roles of LPL in lipid and lipoprotein metabolism, we generated transgenic rabbits expressing human LPL. In postheparinized plasma of transgenic rabbits, the human LPL protein levels were about 650 ng/ml, and LPL enzymatic activity was found at levels up to 4-fold greater than that in nontransgenic littermates. Increased LPL activity in transgenic rabbits was associated with as much as an 80% decrease in plasma triglycerides and a 59% decrease in high density lipoprotein-cholesterol. Analysis of the lipoprotein density fractions revealed that increased expression of the LPL transgene resulted in a remarkable reduction in the level of very low density lipoproteins as well as in the level of intermediate density lipoproteins. In addition, LDL cholesterol levels in transgenic rabbits were significantly increased. When transgenic rabbits were fed a cholesterol-rich diet, the development of hypercholesterolemia and aortic atherosclerosis was dramatically suppressed in transgenic rabbits. These results demonstrate that systemically increased LPL activity functions in the metabolism of all classes of lipoproteins, thereby playing a crucial role in plasma triglyceride hydrolysis and lipoprotein conversion, and that overexpression of LPL protects against diet-induced hypercholesterolemia and atherosclerosis.
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Affiliation(s)
- J Fan
- Department of Pathology, Institute of Basic Medical Sciences, University of Tsukuba, Tsukuba 305-8575, Japan.
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496
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Cai G, Li T, Deng H, Wu M, Liu X, Collier DA. [Linkage disequilibrium analysis of chromosome 22 and schizophrenia in a Chinese population]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2001; 18:335-7. [PMID: 11592037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
OBJECTIVE To explore the molecular genetic relations of chromosome 22 and schizophrenia and locate the susceptibility gene of schizophrenia. METHODS Six dinucleotide tandem repeat loci on chromosome 22 were chosen to analyze 126 affected sib-pair nuclear families of schizophrenia in Chinese population by fluorescent labeled auto-mated genotyping and transmission/ disequilibrium test(TDT). RESULTS The TDT-chi square value of IL2Rbeta was 25.30(P=0.01), which suggests there is linkage disequilibrium between IL2R beta and schizophrenia. The P vaules of the other five loci (D22S944, D22S264, D22S303, D22S278 and CYP2D6) were greater than 0.05. CONCLUSION A susceptive gene of schizophrenia may be located in IL2Rbeta locus or adjacent region.
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Affiliation(s)
- G Cai
- Institute of Mental Health, The First Affiliated Hospital, West China University of Medical Sciences, Chengdu, Sichuan, 610041 P.R. China.
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497
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Abstract
The reaction of lead(IV) 4-indolyl triacetate with substituted methyl 2-oxo-1-cyclohexanecarboxylates has been investigated as a route to the natural product N-methylwelsitindolinone C isothiocyanate. Reaction of lead(IV) reagent 18 with beta-ketoester 20 affords the desired coupled material in excellent yield and diastereoselectivity. Reaction: see text.
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Affiliation(s)
- H Deng
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA
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498
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Li L, Liang Z, Deng H, Li Y, Zhang X, Yang X. [The measurement of 153Sm-EDTMP bone uptake rate and its relationship with therapeutic effect]. Hua Xi Yi Ke Da Xue Xue Bao 2001; 32:446-8. [PMID: 12536590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To evaluate the measurement of 153Sm-EDTMP Bone uptake rate with whole-body scintigraphy and analyze the relationship between bone uptake rate and therapeutic effect. METHODS 66 patients with bony metastases were examined with whole-body scintigraphy 10 minutes and 6 hours after the administration of 153Sm-EDTMP, and then bone uptake rate was calculated. RESULTS The bone uptake rate in 66 patients ranged from 31.9% to 86.6%, (mean 56.0%). The patients with higher bone uptake rate had better overall therapeutic effect. According to the bone uptake rate calculated by whole-body scintigraphy, the therapy activity administered within the limit of bone marrow absorbed dose of 1400 mGy in these patients was 1.40-2.27GBq (mean 1.90 GBq). CONCLUSION The present authors have developed a whole-body scintigraphic technique which is simple and reliable in calculating prospectively a safe and effective dose of 153Sm-EDTMP for palliating the patient's painful bone metastases without myelotoxicity.
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Affiliation(s)
- L Li
- Department of Nuclear Medicine, First Affiliated Hospital, WCUMS, Chengdu 610041, China
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499
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Deng H, Tang WL, Pan Q. [Gly40Ser mutation of glucagon receptor gene and NIDDM in Han nationality]. Hunan Yi Ke Da Xue Xue Bao 2001; 26:291-3. [PMID: 12536714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
OBJECTIVE To ascertain whether Gly40Ser mutation in exon 2 of glucagon receptor (GCG-R) gene is associated with late-onset non-insulin-dependent diabetes millitus (NIDDM) in Chinese. METHODS We selected 82 NIDDM patients and 136 controls of Han nationality in Hunan province, and detected Gly40Ser mutation using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). RESULTS None of Gly40Ser mutation was found in all subjects. CONCLUSIONS The mutation doesn't associate with NIDDM in Chinese, even though the mutation was reported to be associated with NIDDM in certain French and Caucasians, genetic heterogeneity of NIDDM among ethnic groups should be considered.
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Affiliation(s)
- H Deng
- National Lab of Medical Genetics of China, Central South University, Changsha 410078, China
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500
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Deng HW, Xu FH, Conway T, Deng XT, Li JL, Davies KM, Deng H, Johnson M, Recker RR. Is population bone mineral density variation linked to the marker D11S987 on chromosome 11q12-13? J Clin Endocrinol Metab 2001; 86:3735-41. [PMID: 11502804 DOI: 10.1210/jcem.86.8.7762] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Our purpose is to test linkage of human chromosome 11q12-13 to BMD variation. Chromosome 11q12-13 has been linked to three BMD-related phenotypes that are inherited as Mendelian traits in human pedigrees: an autosomal dominant high bone mass trait, autosomal recessive osteoporosis pseudoglioma, and autosomal recessive osteopetrosis. A sibling pair study with 374 sibships showed significant linkage of D11S987 to normal BMD variation, with a maximum logarithm of odds score of 3.5. However, a subsequent linkage study with a total of 595 sibling pairs demonstrated reduced significance for linkage of D11S987 to bone mineral density variation, with a logarithm of odds score less than 2.2. We genotyped five markers in a genomic region of approximately 27 cM centering on D11S987 and measured bone mineral density and other traits (weight, etc.) for 635 individuals from 53 human pedigrees. Each of these pedigrees was ascertained through a proband with bone mineral density Z-scores less than -1.28 at the hip or spine. Adjusting for age, sex, and weight as covariates, we performed two-point and multipoint linkage analyses using the variance component linkage analysis method implemented in Sequential Oligogenic Linkage Analysis Routines. We found little evidence of linkage of these five markers to bone mineral density at the spine, hip, wrist and total body bone mineral content. The maximum logarithm of odds score at these five markers was 0.25, and the maximum logarithm of odds score at D11S987 was 0.15. Therefore, although we cannot exclude the linkage of D11S987 region to bone mineral density variation, there is no evidence for linkage of the marker D11S987 on human chromosome 11q12-13 to bone mineral density variation in our study population.
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Affiliation(s)
- H W Deng
- Osteoporosis Research Center, Creighton University, Omaha, Nebraska 68131, USA
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