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Marconi A, Di Marcantonio P, D'Odorico V, Cristiani S, Maiolino R, Oliva E, Origlia L, Riva M, Valenziano L, Zerbi FM, Abreu M, Adibekyan V, Allende Prieto C, Amado PJ, Benz W, Boisse I, Bonfils X, Bouchy F, Buchhave L, Buscher D, Cabral A, Canto Martins BL, Chiavassa A, Coelho J, Christensen LB, Delgado-Mena E, de Medeiros JR, Di Varano I, Figueira P, Fisher M, Fynbo JPU, Glasse ACH, Haehnelt M, Haniff C, Hansen CJ, Hatzes A, Huke P, Korn AJ, Leão IC, Liske J, Lovis C, Maslowski P, Matute I, McCracken RA, Martins CJAP, Monteiro MJPFG, Morris S, Morris T, Nicklas H, Niedzielski A, Nunes NJ, Palle E, Parr-Burman PM, Parro V, Parry I, Pepe F, Piskunov N, Queloz D, Quirrenbach A, Rebolo Lopez R, Reiners A, Reid DT, Santos N, Seifert W, Sousa S, Stempels HC, Strassmeier K, Sun X, Udry S, Vanzi L, Vestergaard M, Weber M, Zackrisson E. EELT-HIRES the high-resolution spectrograph for the E-ELT. ACTA ACUST UNITED AC 2016. [DOI: 10.1117/12.2231653] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
| | | | - V. D'Odorico
- INAF - Osservatorio Astronomico di Trieste (Italy)
| | - S. Cristiani
- INAF - Osservatorio Astronomico di Trieste (Italy)
| | | | - E. Oliva
- INAF - Osservatorio Astrofisico di Arcetri (Italy)
| | - L. Origlia
- INAF - Osservatorio Astronomico di Bologna (Italy)
| | - M. Riva
- INAF - Osservatorio Astronomico di Brera (Italy)
| | | | | | | | | | | | - P. J. Amado
- Instituto de Astrofísica de Andalucía (Spain)
| | | | - I. Boisse
- Lab. d'Astrophysique de Marseille (France)
| | - X. Bonfils
- Observatoire de Science de l'Univ. de Grenoble (France)
| | | | | | | | | | | | - A. Chiavassa
- Lab. Lagrange, Univ. Côte d'Azur, Observatoire de la Côte d'Azur (France)
| | | | | | | | | | - I. Di Varano
- Leibniz-Institut für Astrophysik Potsdam (Germany)
| | | | | | | | | | | | | | | | - A. Hatzes
- Thüringer Landessternwarte Tautenburg (Germany)
| | - P. Huke
- Univ. of Göttingen (Germany)
| | | | - I. C. Leão
- Federal Univ. of Rio Grande do Norte (Brazil)
| | | | | | | | | | | | | | | | | | | | | | | | | | - E. Palle
- Instituto de Astrofísica de Canarias (Spain)
| | | | - V. Parro
- Instituto Mauá de Tecnologia (Brazil)
| | - I. Parry
- Univ. of Cambridge (United Kingdom)
| | - F. Pepe
- Univ. de Genève (Switzerland)
| | | | | | | | | | | | | | | | | | | | | | | | - X. Sun
- Univ. of Cambridge (United Kingdom)
| | - S. Udry
- Univ. de Genève (Switzerland)
| | - L. Vanzi
- Pontificia Univ. Católica de Chile (Chile)
| | | | - M. Weber
- Leibniz-Institut für Astrophysik Potsdam (Germany)
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Pentericci L, Vanzella E, Fontana A, Castellano M, Treu T, Mesinger A, Dijkstra M, Grazian A, Bradač M, Conselice C, Cristiani S, Dunlop J, Galametz A, Giavalisco M, Giallongo E, Koekemoer A, McLure R, Maiolino R, Paris D, Santini P. NEW OBSERVATIONS OFz∼ 7 GALAXIES: EVIDENCE FOR A PATCHY REIONIZATION. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/0004-637x/793/2/113] [Citation(s) in RCA: 183] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Cimatti A, Daddi E, Renzini A, Cassata P, Vanzella E, Pozzetti L, Cristiani S, Fontana A, Rodighiero G, Mignoli M, Zamorani G. Old galaxies in the young Universe. Nature 2004; 430:184-7. [PMID: 15241408 DOI: 10.1038/nature02668] [Citation(s) in RCA: 312] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2004] [Accepted: 05/17/2004] [Indexed: 11/09/2022]
Abstract
More than half of all stars in the local Universe are found in massive spheroidal galaxies, which are characterized by old stellar populations with little or no current star formation. In present models, such galaxies appear rather late in the history of the Universe as the culmination of a hierarchical merging process, in which larger galaxies are assembled through mergers of smaller precursor galaxies. But observations have not yet established how, or even when, the massive spheroidals formed, nor if their seemingly sudden appearance when the Universe was about half its present age (at redshift z approximately 1) results from a real evolutionary effect (such as a peak of mergers) or from the observational difficulty of identifying them at earlier epochs. Here we report the spectroscopic and morphological identification of four old, fully assembled, massive (10(11) solar masses) spheroidal galaxies at l.6 < z < 1.9, the most distant such objects currently known. The existence of such systems when the Universe was only about one-quarter of its present age shows that the build-up of massive early-type galaxies was much faster in the early Universe than has been expected from theoretical simulations.
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Affiliation(s)
- A Cimatti
- INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125, Firenze, Italy.
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Cortelezzi A, Cattaneo C, Cristiani S, Duca L, Sarina B, Deliliers GL, Fiorelli G, Cappellini MD. Non-transferrin-bound iron in myelodysplastic syndromes: a marker of ineffective erythropoiesis? Hematol J 2002; 1:153-8. [PMID: 11920184 DOI: 10.1038/sj.thj.6200028] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/1999] [Accepted: 02/22/2000] [Indexed: 11/08/2022]
Abstract
INTRODUCTION Iron overload is usually observed in patients (even untransfused) with myelodysplastic syndromes (MDS), and contributes towards the generation of low molecular weight iron complexes or non-transferrin-bound iron (NTBI), which in turn favors oxidative DNA damage and consequent apoptosis. MATERIALS AND METHODS Levels of NTBI and lipid peroxidation were evaluated by means of free serum malondyaldehyde (MDA) in untransfused MDS patients and we tried to correlate them with ineffective erythropoiesis, apoptosis and the pattern of in vitro growth. RESULTS NTBI levels were found to be significantly higher in low-risk than in high-risk MDS patients, as well as in patients with a lower myeloid/erythroid ratio. MDA was found to be uniformly higher in the MDS patients as a whole than in normal controls. The bone marrow progenitor cells in the MDS patients with high NTBI levels showed a higher degree of apoptosis, but this difference was not statistically significant. Patients with a leukemic growth pattern had lower NTBI levels than those with a non-leukemic pattern. CONCLUSION These data suggest that NTBI is related to the degree of ineffective erythropoiesis and that it contributes towards inducing apoptosis in MDS bone marrow precursors. The presence of leukemic growth is associated with low NTBI levels, probably due to increased iron consumption by blast cells.
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Affiliation(s)
- A Cortelezzi
- Servizio Autonomo di Ematologia Diagnostica, Ospedale Maggiore, IRCCS, Milano, Italy.
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Cortelezzi A, Cattaneo C, Sarina B, Cristiani S, Pomati M, Silvestris I, Motta M, Ibatici A, Gornati G, Volpe AD, Maiolo AT. Efficacy of N-acetylcysteine and all-trans retinoic acid in restoring in vitro effective hemopoiesis in myelodysplastic syndromes. Leuk Res 2000; 24:129-37. [PMID: 10654448 DOI: 10.1016/s0145-2126(99)00165-4] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We evaluated the in vitro effect on clonogenic potential (CFU-GM) and apoptosis in myelodysplastic syndromes (MDS) progenitors of an anti-oxidant (N-acetylcysteine, NAC) and/or a differentiating (all-trans retinoic acid, ATRA) agent. NAC significantly reduced apoptosis, both NAC and ATRA induced an increase in CFU-GM, but NAC seemed to be particularly effective in the high risk (HR) MDS. NAC + ATRA conferred a significant advantage in terms of CFU-GM with respect to NAC and ATRA alone. Tumor Necrosis Factor-alpha (TNF-alpha) levels decreased after incubation with NAC in the MDS samples. This study shows that ineffective hemopoiesis in MDS could benefit from both NAC and ATRA, suggesting that anti-oxidant treatment may play a role in guaranteeing MDS cell survival, predisposing them towards differentiation.
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Affiliation(s)
- A Cortelezzi
- Servizio Autonomo di Ematologia Diagnostica, Ospedale Maggiore Policlinico IRCCS, Milan, Italy.
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Abstract
The presence of the ancient anti-inflammatory peptide alpha-melanocyte-stimulating hormone [alpha-MSH (1-13), SYSMEHFRWGKPV] in barrier organs such as gut and skin suggests a role in the nonspecific (innate) host defense. alpha-MSH and and its carboxy-terminal tripeptide (11-13, KPV) were determined to have antimicrobial influences against two major and representative pathogens: Staphylococcus aureus and Candida albicans. alpha-MSH peptides significantly inhibited S. aureus colony formation and reversed the enhancing effect of urokinase on colony formation. Antimicrobial effects occurred over a broad range of concentrations including the physiological (picomolar) range. Small concentrations of alpha-MSH peptides likewise reduced viability and germ tube formation of the yeast C. albicans. Antimicrobial influences of alpha-MSH peptides could be mediated by their capacity to increase cellular cAMP. Indeed, this messenger was significantly augmented in peptide-treated yeast and the potent adenylyl cyclase inhibitor dideoxyadenosine (ddAdo) partly reversed the killing activity of alpha-MSH peptides. Reduced killing of pathogens is a detrimental consequence of therapy with anti-inflammatory drugs. Because alpha-MSH has potent anti-inflammatory effects we determined influences of alpha-MSH on C. albicans and S. aureus killing by human neutrophils. alpha-MSH peptides did not reduce killing but rather enhanced it, likely as a consequence of the direct antimicrobial activity. alpha-MSH peptides that combine antipyretic, anti-inflammatory, and antimicrobial effects could be useful in treatment of disorders in which infection and inflammation coexist.
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Affiliation(s)
- M Cutuli
- 3rd Division of Internal Medicine, IRCCS Ospedale Maggiore, Milano, Italy
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Cortelezzi A, Cattaneo C, Cristiani S, Sarina B, Pomati M, Silvestris I, Ibatici A, Maiolo AT. Low plasma stem cell factor levels correlate with in vitro leukemic growth in myelodysplastic syndromes. Leuk Res 1999; 23:271-5. [PMID: 10071080 DOI: 10.1016/s0145-2126(98)00175-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 12/01/2022]
Abstract
We evaluated the effect of SCF on myeloid differentiation by correlating clonogenic potential (as CFU-GM), bone marrow (BM) plasma SCF levels and CD34/c-kit expression in 57 MDS samples. There was a significant correlation between low SCF levels and 'leukemic' in vitro growth, the number of clusters and the colony/cluster ratio. No correlation was found between BM plasma SCF levels, the pattern of growth and CD34+ c-kit+ expression. These data seem to exclude any direct effect of SCF on leukemogenesis, but suggest that low plasma SCF levels may be at least partially responsible for leukemic growth in MDS.
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Affiliation(s)
- A Cortelezzi
- Institution Servizio di Ematologia, IRCCS, Ospedale Maggiore, Milano, Italy
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Cortelezzi A, Sarina B, Cattaneo C, Pomati M, Carrabba M, Giannini S, Cristiani S, Silvestris I, Maiolo A. 88 Low stem cell factor plasma levels are correlated with in vitro leukemic growth in myelodysplastic syndromes. Leuk Res 1997. [DOI: 10.1016/s0145-2126(97)81299-4] [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: 11/26/2022]
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Pedersen H, Tarenghi M, Cristiani S, Salvati M. CCD images of the 6.1 ms pulsar field. Nature 1983. [DOI: 10.1038/306568a0] [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: 11/09/2022]
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