1
|
Palumbo E, Piotto C, Baggio L, Groff E, Calura E, Busato F, El Khouzai B, Fasanaro E, Rigo M, Loreggian L, Romualdi C, Russo A, Mognato M, Zafiropoulos D, Corti L. PO-0974: Biomarkers of radiosensitivity for patient stratification and personalized radiotherapy treatment. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31410-x] [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: 10/19/2022]
|
2
|
Baggio L, Gil-González S, Barra-González X, Collado-Saenz F, Cruz-Olive E. [Cemented stems in revision total knee arthroplasty on patients older than 75 y/o. Clinical and radiological analysis]. Acta Ortop Mex 2016; 30:85-90. [PMID: 27846356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
BACKGROUND The purpose of this study was to analyze the clinical and radiological evolution of the total knee revision arthroplasty with cemented stems in patients over 75 years. MATERIAL AND METHODS A retrospective analysis was performed in all the subjects who underwent revision of total knee arthroplasty with cemented stems between 2008 and 2014 in our center. Twenty-seven individuals over 75 years met the inclusion criteria. We assessed the Knee Society Score and range of motion for clinical outcome. We evaluated the implant stability with radiographs through radiolucent lines according to the modified radiological scale of the Knee Society; we registered the complications and prosthetic survival. RESULTS With an average age of our participants of 82.6 ± 4.4 years and a follow-up of 43 ± 14.4 months, we did not find any mechanical failure of the components. The functional average score was 115 ± 32 in the total KSS, of which 77 ± 17.5 points were in the KSS knee and 42 ± 24 in the KSS function. The average range of motion was 98º ± 17. Radiologically, 18 patients presented radiolucent lines, but only three needed follow-up using the modified Knee Society radiographic scoring system. CONCLUSIONS The results revealed that cemented stems are a good method for fixation in the revision of total knee arthroplasty in people over 75 years. We observed acceptable medium-term clinical results with a low risk of radiological failure, despite the high number of radiolucencies.
Collapse
Affiliation(s)
- L Baggio
- Servicio de Cirugía Ortopédica. Hospital General de Granollers, España
| | - S Gil-González
- Servicio de Cirugía Ortopédica. Hospital General de Granollers, España
| | - X Barra-González
- Servicio de Cirugía Ortopédica. Hospital General de Granollers, España
| | - F Collado-Saenz
- Servicio de Cirugía Ortopédica. Hospital General de Granollers, España
| | - E Cruz-Olive
- Servicio de Cirugía Ortopédica. Hospital General de Granollers, España
| |
Collapse
|
3
|
Rigoni L, Scroferneker ML, Pitombeira BS, Ottoni E, Paz A, Fischer G, Michalowski M, Pezzi A, Amorin B, Valim V, Baggio L, Laureano Á, da Silva MA, Silla L, Daudt L. Importance of early absolute lymphocyte count after allogeneic stem cell transplantation: a retrospective study. Transplant Proc 2015; 47:511-6. [PMID: 25769599 DOI: 10.1016/j.transproceed.2014.11.042] [Citation(s) in RCA: 5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 05/14/2014] [Accepted: 11/25/2014] [Indexed: 01/13/2023]
Abstract
INTRODUCTION Early lymphocyte recovery after allogeneic hematopoietic stem cell transplantation (HSCT) is related to the prevention of serious infections and the clearing of residual tumor cells. METHODS We analyzed the absolute lymphocyte count at 20 (D+20) and 30 (D+30) days after HSCT in 100 patients with malignant hematologic diseases and correlated with the risk of transplant-related mortality, overall survival (OS), disease-free survival (DFS), nonrelapsed mortality (NRM), and risk of infection. RESULTS Patients presenting with lymphocyte counts of <300 × 103/μL on D+30 have a 3.76 times greater risk of death in <100 days. Over a medium follow-up of 20 months OS, DFS, and NRM were similar between the groups. CONCLUSION In our group of patients delayed lymphocyte recovery after HSCT was a predictor of early death post-HSCT.
Collapse
Affiliation(s)
- L Rigoni
- Hematology and Bone Marrow Transplantation, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - B S Pitombeira
- Hematology and Bone Marrow Transplantation, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - E Ottoni
- Hematology and Bone Marrow Transplantation, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - A Paz
- Hematology and Bone Marrow Transplantation, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - G Fischer
- Hematology and Bone Marrow Transplantation, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - M Michalowski
- Pediatric Oncology, Hospital Santo Antônio, Porto Alegre, Brazil
| | - A Pezzi
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Laboratory of Cell Culture and Molecular Analysis of Hematopoietic Cells, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - B Amorin
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Laboratory of Cell Culture and Molecular Analysis of Hematopoietic Cells, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - V Valim
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Laboratory of Cell Culture and Molecular Analysis of Hematopoietic Cells, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - L Baggio
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Laboratory of Cell Culture and Molecular Analysis of Hematopoietic Cells, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Á Laureano
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Laboratory of Cell Culture and Molecular Analysis of Hematopoietic Cells, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - M A da Silva
- Laboratory of Cell Culture and Molecular Analysis of Hematopoietic Cells, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - L Silla
- Hematology and Bone Marrow Transplantation, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil; Laboratory of Cell Culture and Molecular Analysis of Hematopoietic Cells, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil.
| | - L Daudt
- Hematology and Bone Marrow Transplantation, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil; Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| |
Collapse
|
4
|
Palmieri A, Sorarù G, Lombardi L, D'Ascenzo C, Baggio L, Ermani M, Pegoraro E, Angelini C. Quality of life and motor impairment in ALS: Italian validation of ALSAQ. Neurol Res 2010; 32:32-40. [PMID: 20092693 DOI: 10.1179/174313209x385734] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
OBJECTIVES To evaluate the validity and reliability of the amyotrophic lateral sclerosis assessment questionnaire (ALSAQ) in an Italian cohort of ALS patients and to further characterize the relationship between motor impairment and quality of life (QoL) in ALS. METHODS Seventy-six patients completed the Italian version of ALSAQ-40 and ALSAQ-5. To verify test-retest reliability, 30 patients were revaluated after 3 months. The medical outcome study short form 36 (MOS SF-36) questionnaire and revised ALS functional rating scale (ALSFR-R) scale were used to assess Italian ALSAQ-40 construct validity. The limb muscles' Medical Research Council (MRC) score and forced vital capacity (FVC) were used to measure the degree of motor impairment. RESULTS The Italian ALSAQ-40 showed a very good internal consistency (all subscales Cronbach's alpha>0.86) and a good construct validity as shown by the patterns of correlation between the subscales and SF-36 (resp. ALSFRS-R) scores. ALSAQ-5 showed a positive correlation with the corresponding ALS patient total score and subscale scores of the ALSAQ-40 (Spearman's correlation coefficient>0.73). The emotional functioning subscale did not correlate with any motor impairment measures. DISCUSSION Italian ALSAQ-40 and ALSAQ-5 psychometric properties are reliable and similar to those showed by the original English version. We observed emotional aspects to be distinct from physical involvement.
Collapse
Affiliation(s)
- A Palmieri
- Department of Neurosciences, University of Padova, Padova, Italy.
| | | | | | | | | | | | | | | |
Collapse
|
5
|
Sorarù G, Pegoraro E, Spinella P, Turra S, D'Ascenzo C, Baggio L, Mantovan MC, Vergani L, Angelini C. A pilot trial with clenbuterol in amyotrophic lateral sclerosis. ACTA ACUST UNITED AC 2009; 7:246-8. [PMID: 17127564 DOI: 10.1080/14660820600600558] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Gianni Sorarù
- Department of Neurosciences, Neurology Unit, Piove di Sacco Hospital, Padova, Italy.
| | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Acernese F, Alshourbagy M, Amico P, Antonucci F, Aoudia S, Astone P, Avino S, Ballardin G, Baggio L, Barone F, Barsotti L, Barsuglia M, Bauer TS, Bigotta S, Birindelli S, Bizouard MA, Boccara AC, Bondu F, Bosi L, Braccini S, Bradaschia C, Brillet A, Brisson V, Buskulic D, Cagnoli G, Calloni E, Campagna E, Carbognani F, Carbone L, Cavalier F, Cavalieri R, Cella G, Cesarini E, Chassande-Mottin E, Chatterji S, Cleva F, Coccia E, Corda C, Corsi A, Cottone F, Coulon JP, Cuoco E, D'Antonio S, Dari A, Dattilo V, Davier M, De Rosa R, Del Prete M, Di Fiore L, Di Lieto A, Di Paolo Emilio M, Di Virgilio A, Evans M, Fafone V, Ferrante I, Fidecaro F, Fiori I, Flaminio R, Fournier JD, Frasca S, Frasconi F, Gammaitoni L, Garufi F, Genin E, Gennai A, Giazotto A, Giordano L, Granata V, Greverie C, Grosjean D, Guidi G, Hamdani S, Hebri S, Heitmann H, Hello P, Huet D, La Penna P, Laval M, Leroy N, Letendre N, Lopez B, Lorenzini M, Loriette V, Losurdo G, Mackowski JM, Majorana E, Man N, Mantovani M, Marchesoni F, Marion F, Marque J, Martelli F, Masserot A, Menzinger F, Milano L, Minenkov Y, Moins C, Morgado N, Mosca S, Mours B, Neri I, Nocera F, Pagliaroli G, Palomba C, Paoletti F, Pardi S, Pasqualetti A, Passaquieti R, Passuello D, Persichetti G, Piergiovanni F, Pinard L, Poggiani R, Punturo M, Puppo P, Rabaste O, Rapagnani P, Regimbau T, Remillieux A, Ricci F, Ricciardi I, Rocchi A, Rolland L, Romano R, Ruggi P, Russo G, Sentenac D, Solimeno S, Swinkels BL, Tarallo M, Terenzi R, Toncelli A, Tonelli M, Tournefier E, Travasso F, Vajente G, van den Brand JFJ, van der Putten S, Verkindt D, Vetrano F, Viceré A, Vinet JY, Vocca H, Yvert M. In-vacuum optical isolation changes by heating in a Faraday isolator. Appl Opt 2008; 47:5853-5861. [PMID: 19122727 DOI: 10.1364/ao.47.005853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We describe a model evaluating changes in the optical isolation of a Faraday isolator when passing from air to vacuum in terms of different thermal effects in the crystal. The changes are particularly significant in the crystal thermal lensing (refraction index and thermal expansion) and in its Verdet constant and can be ascribed to the less efficient convection cooling of the magneto-optic crystal of the Faraday isolator. An isolation decrease by a factor of 10 is experimentally observed in a Faraday isolator that is used in a gravitational wave experiment (Virgo) with a 10 W input laser when going from air to vacuum. A finite element model simulation reproduces with a great accuracy the experimental data measured on Virgo and on a test bench. A first set of measurements of the thermal lensing has been used to characterize the losses of the crystal, which depend on the sample. The isolation factor measured on Virgo confirms the simulation model and the absorption losses of 0.0016 +/- 0.0002/cm for the TGG magneto-optic crystal used in the Faraday isolator.
Collapse
|
7
|
Acernese F, Amico P, Alshourbagy M, Antonucci F, Aoudia S, Astone P, Avino S, Baggio L, Ballardin G, Barone F, Barsotti L, Barsuglia M, Bauer TS, Bigotta S, Bizouard MA, Boccara C, Bondu F, Bosi L, Bradaschia C, van den Brand JFJ, Birindelli S, Braccini S, Brillet A, Brisson V, Buskulic D, Cagnoli G, Calloni E, Campagna E, Carbognani F, Cavalier F, Cavalieri R, Cella G, Cesarini E, Chassande-Mottin E, Clapson AC, Cleva F, Coccia E, Corda C, Corsi A, Cottone F, Coulon JP, Cuoco E, D’Antonio S, Dari A, Dattilo V, Davier M, del Prete M, De Rosa R, Di Fiore L, Di Lieto A, Di Virgilio A, Dujardin B, Evans M, Fafone V, Ferrante I, Fidecaro F, Fiori I, Flaminio R, Fournier JD, Frasca S, Frasconi F, Gammaitoni L, Garufi F, Genin E, Gennai A, Giazotto A, Giordano L, Granata V, Greverie C, Grosjean D, Guidi G, Hamdani S, Hebri S, Heitmann H, Hello P, Huet D, Kreckelbergh S, La Penna P, Laval M, Leroy N, Letendre N, Lopez B, Lorenzini M, Loriette V, Losurdo G, Mackowski JM, Majorana E, Man CN, Mantovani M, Marchesoni F, Marion F, Marque J, Martelli F, Masserot A, Menzinger F, Milano L, Minenkov Y, Moins C, Moreau J, Morgado N, Mosca S, Mours B, Neri I, Nocera F, Pagliaroli G, Pallottino GV, Palomba C, Paoletti F, Pardi S, Pasqualetti A, Passaquieti R, Passuello D, Piergiovanni F, Pinard L, Poggiani R, Punturo M, Puppo P, van der Putten S, Rapagnani P, Regimbau T, Reita V, Remillieux A, Ricci F, Ricciardi I, Rocchi A, Romano R, Ruggi P, Russo G, Solimeno S, Spallicci A, Tarallo M, Terenzi R, Tonelli M, Toncelli A, Tournefier E, Travasso F, Tremola C, Vajente G, Verkindt D, Vetrano F, Viceré A, Vinet JY, Vocca H, Yvert M. The Virgo 3 km interferometer for gravitational wave detection. ACTA ACUST UNITED AC 2008. [DOI: 10.1088/1464-4258/10/6/064009] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
8
|
Sorarù G, D'Ascenzo C, Polo A, Palmieri A, Baggio L, Vergani L, Gellera C, Moretto G, Pegoraro E, Angelini C. Spinal and bulbar muscular atrophy: skeletal muscle pathology in male patients and heterozygous females. J Neurol Sci 2007; 264:100-5. [PMID: 17854832 DOI: 10.1016/j.jns.2007.08.012] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.9] [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: 05/02/2007] [Revised: 07/24/2007] [Accepted: 08/06/2007] [Indexed: 11/13/2022]
Abstract
Spinal and bulbar muscular atrophy (SBMA) is an adult form of X-linked motor neuron disease caused by an expansion of a CAG repeat sequence in the first exon of the androgen receptor (AR) gene. Nuclear accumulation of mutant AR with expanded polyglutamines in motor neurons is a major pathogenic mechanism. To characterize muscle involvement in SBMA the skeletal muscle biopsies of 8 SBMA patients and 3 female carriers were studied. Six of 8 SBMA patients showed myogenic changes together with the neurogenic atrophy in their muscle biopsy. Myopathic abnormalities did not correlate with disease duration and were more prominent in the muscle of patients with an higher degree of disability. In all patients plasma CK levels were more elevated than what usually occurs in denervative diseases. Both neurogenic and myopathic changes were also observed in female carriers. Here we suggest that myopathic changes in SBMA muscle are not only related to denervation and that muscle satellite cells may have a role in the pathogenesis of muscle damage.
Collapse
MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Biopsy
- Creatine Kinase/blood
- DNA Repeat Expansion/genetics
- Disease Progression
- Female
- Genetic Predisposition to Disease/genetics
- Heterozygote
- Humans
- Male
- Middle Aged
- Motor Neurons/metabolism
- Motor Neurons/pathology
- Muscle Fibers, Skeletal/metabolism
- Muscle Fibers, Skeletal/pathology
- Muscle, Skeletal/pathology
- Muscle, Skeletal/physiopathology
- Muscular Atrophy, Spinal/genetics
- Muscular Atrophy, Spinal/pathology
- Muscular Atrophy, Spinal/physiopathology
- Nerve Degeneration/genetics
- Nerve Degeneration/metabolism
- Nerve Degeneration/physiopathology
- Peptides/genetics
- Receptors, Androgen/genetics
- Satellite Cells, Skeletal Muscle/metabolism
- Satellite Cells, Skeletal Muscle/pathology
- Severity of Illness Index
- Sex Characteristics
Collapse
Affiliation(s)
- Gianni Sorarù
- Department of Neurological Sciences, University of Padova, Italy.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Baggio L, Bignotto M, Bonaldi M, Cerdonio M, Conti L, De Rosa M, Falferi P, Fortini P, Inguscio M, Liguori N, Marin F, Mezzena R, Mion A, Ortolan A, Prodi GA, Poggi S, Salemi F, Soranzo G, Taffarello L, Vedovato G, Vinante A, Vitale S, Zendri JP. Upper limits on gravitational-wave emission in association with the 27 Dec 2004 giant flare of SGR1806-20. Phys Rev Lett 2005; 95:081103. [PMID: 16196848 DOI: 10.1103/physrevlett.95.081103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2005] [Indexed: 05/04/2023]
Abstract
At the time when the giant flare of SGR1806-20 occurred, the AURIGA "bar" gravitational-wave (GW) detector was on the air with a noise performance close to stationary Gaussian. This allows us to set relevant upper limits, at a number of frequencies in the vicinities of 900 Hz, on the amplitude of the damped GW wave trains, which, according to current models, could have been emitted, due to the excitation of normal modes of the star associated with the peak in x-ray luminosity.
Collapse
Affiliation(s)
- L Baggio
- Institute for Cosmic Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8582, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Abstract
Subtle neuropsychological deficits have been described in patients affected by amyotrophic lateral sclerosis (ALS) without dementia. Overall, selective impairment in memory function has been reported, but the source of memory impairment in ALS has yet to be defined. We performed neuropsychological screening in 20 ALS patients. Semantic encoding and post-encoding cue effects on the retrieval of word lists were investigated in the ALS patients and normal controls. Severity of memory impairment was correlated to cerebral blood perfusion detected by single photon emission computed tomography (SPECT). ALS patients showed moderate impairments in frontal and memory tests. Short-term memory was normal, while serial position retrieval of word lists with normal recency effect but poor primacy effect showed long-term memory deficit. ALS patients performed better in cued encoding than in cued post-encoding recall condition. In the cued post-encoding condition, the primacy effect in word list recall improved significantly in controls, but not in ALS patients, as compared with both the free recall and cued encoding conditions. SPECT hypoperfusion was observed in frontal and temporal areas in ALS patients. ALS patients showed a long-term memory deficit which did not improve in cued post-encoding condition as it does for controls. We hypothesize abnormal retrieval processes related to frontal lobe dysfunction which entails difficulties in generating stable long-memory traces at encoding.
Collapse
Affiliation(s)
- M C Mantovan
- Department of Neurological and Psychiatric Sciences, University of Padua, Padua, Italy.
| | | | | | | | | | | | | | | |
Collapse
|
11
|
Abstract
Low dose hyper-radiosensitivity (HRS) of V79 cells was demonstrated after irradiation with gamma rays and 4He2+ ions of various linear energy transfer (LET) values (58.9, 79.3 and 101.7 keV.micron-1). In parallel, the cytogenetic analysis showed an LET dependence of aberrations at a dose of 1 Gy, while the observed chromatid fragments appeared to vary with the number of 4He2+ ions traversing the cell nucleus. The results of both studies are correlated so as to achieve a better understanding of the so-called induced radioresistance. The cell mechanism of radioresistance appears to be induced after a certain amount of energy is deposited in the cell nucleus. This amount depends both on the radiation quality as well as the number of particles traversing the cell, inducing chromosome alterations and chromatid damage.
Collapse
Affiliation(s)
- E Tsoulou
- Institute of Nuclear Physics, NCSR Demokritos, Aghia Paraskevi 153 10 Athens, Greece.
| | | | | | | |
Collapse
|
12
|
Baggio L, Cavinato M, Cherubini R, Conzato M, Cucinotta F, Favaretto S, Gerardi S, Lora S, Stoppa P, Williams JR. Relative biological effectiveness of light ions in human tumoural cell lines: role of protein p53. Radiat Prot Dosimetry 2002; 99:211-214. [PMID: 12194286 DOI: 10.1093/oxfordjournals.rpd.a006764] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Protons and alpha particles of high linear energy transfer (LET) have shown an increased relative biological effectiveness (RBE) with respect to X/gamma rays for several cellular and molecular endpoints in different in vitro cell systems. To contribute to understanding the biochemical mechanisms involved in the increased effectiveness of high LET radiation, an extensive study has been designed. The present work reports the preliminary result of this study on two human tumoural cell lines, DLD1 and HCT116, (with different p53 status), which indicate that for these cell lines, p53 does not appear to take a part in the response to radiation induced DNA damage, suggesting an alternative p53-independent pathway and a cell biochemical mechanism dependent on the cell type.
Collapse
Affiliation(s)
- L Baggio
- INFN-Laboratori Nazionali di Legnaro, Legnaro-Padova, Italy
| | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Tsoulou E, Baggio L, Cherubini R, Kalfas CA. Low-dose hypersensitivity of V79 cells under exposure to gamma-rays and 4He ions of different energies: survival and chromosome aberrations. Int J Radiat Biol 2001; 77:1133-9. [PMID: 11683984 DOI: 10.1080/09553000110073439] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [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: 10/17/2022]
Abstract
PURPOSE To examine the low-dose sensitivity of V79 cells under exposure to gamma-rays and 4He ions of different energies. MATERIALS AND METHODS Cell survival and cytogenetic analysis using the Giemsa technique were studied following irradiation to doses of 0-3 Gy at the INFN-LNL facilities. RESULTS Low-dose hyper-radiosensitivity (HRS) of V79 was demonstrated after irradiation with gamma-rays and alpha-particles of various linear energy transfers (LET) (58.9, 79.3 and 101.7 keV microm(-1)). Cytogenetic analysis showed an LET dependence of aberrations at a dose of 1Gy; the frequency of chromatid fragments appeared to vary with the number of alpha-particles traversing the cell nucleus. The results of both studies fit together to give a better understanding of so-called 'induced radioresistance' phenomenon. CONCLUSIONS The mechanism of induced cellular radioresistance appears to be initiated after a certain amount of energy is deposited in the cell nucleus. This amount depends on both radiation quality and the number of particles traversing the cell.
Collapse
Affiliation(s)
- E Tsoulou
- Institute of Nuclear Physics, NCSR Demokritos, Aghia Paraskevi 153 10, Athens, Greece.
| | | | | | | |
Collapse
|
14
|
Drucker DJ, Lovshin J, Baggio L, Nian M, Adatia F, Boushey RP, Liu Y, Saleh J, Yusta B, Scrocchi L. New developments in the biology of the glucagon-like peptides GLP-1 and GLP-2. Ann N Y Acad Sci 2001; 921:226-32. [PMID: 11193827 DOI: 10.1111/j.1749-6632.2000.tb06970.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [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: 11/29/2022]
Abstract
Glucagon-like peptides 1 and 2 (GLP-1 and GLP-2) are coencoded within a single mammalian proglucagon precursor, and are liberated in the intestine and brain. GLP-1 exerts well known actions on islet hormone secretion, gastric emptying, and food intake. Recent studies suggest GLP-1 plays a central role in the development and organization of islet cells. GLP-1 receptor signaling appears essential for beta cell signal transduction as exemplified by studies of GLP-1R-/- mice. GLP-2 promotes energy assimilation via trophic effects on the intestinal mucosa of the small and large bowel epithelium via a recently cloned GLP-2 receptor. The actions of GLP-2 are preserved in the setting of small and large bowel injury and inflammation. The biological actions of the glucagon-like peptides suggest they may have therapeutic efficacy in diabetes (GLP-1) or intestinal disorders (GLP-2).
Collapse
Affiliation(s)
- D J Drucker
- Department of Medicine, Toronto General Hospital, Banting and Best Diabetes Centre, University of Toronto, Toronto, Ontario, Canada M5G2C4.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Allen ZA, Astone P, Baggio L, Busby D, Bassan M, Blair DG, Bonaldi M, Bonifazi P, Carelli P, Cerdonio M, Coccia E, Conti L, Cosmelli C, D'Antonio S, Fafone V, Falferi P, Fortini P, Frasca S, Hamilton WO, Heng IS, Ivanov EN, Johnson WW, Kingham M, Locke CR, Marini A. First search for gravitational wave bursts with a network of detectors. Phys Rev Lett 2000; 85:5046-50. [PMID: 11102183 DOI: 10.1103/physrevlett.85.5046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2000] [Indexed: 05/21/2023]
Abstract
We report the initial results from a search for bursts of gravitational radiation by a network of five cryogenic resonant detectors during 1997 and 1998. This is the first significant search with more than two detectors observing simultaneously. No gravitational wave burst was detected. The false alarm rate was lower than 1 per 10(4) yr when three or more detectors were operating simultaneously. The typical threshold was H approximately 4x10(-21) Hz-1 on the Fourier component at approximately 10(3) Hz of the gravitational wave strain amplitude. New upper limits for amplitude and rate of gravitational wave bursts have been set.
Collapse
Affiliation(s)
- ZA Allen
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Baggio L, Adatia F, Bock T, Brubaker PL, Drucker DJ. Sustained expression of exendin-4 does not perturb glucose homeostasis, beta-cell mass, or food intake in metallothionein-preproexendin transgenic mice. J Biol Chem 2000; 275:34471-7. [PMID: 10952981 DOI: 10.1074/jbc.m005119200] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [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: 11/06/2022] Open
Abstract
Activation of glucagon-like peptide (GLP)-1 receptor signaling promotes glucose lowering via multiple mechanisms, including regulation of food intake, glucose-dependent insulin secretion, and stimulation of beta-cell mass. As GLP-1 exhibits a short t(12) in vivo, the biological consequences of prolonged GLP-1 receptor signaling remains unclear. To address this question, we have now generated metallothionein promoter-preproexendin (MT-Ex) transgenic mice. MT-Ex mice process preproexendin correctly, as is made evident by detection of circulating plasma exendin-4 immunoreactivity using high pressure liquid chromatography and an exendin-4-specific radioimmunoassay. Despite elevated levels of exendin-4, fasting plasma glucose and glucose clearance following oral and intraperitoneal glucose tolerance tests are normal in MT-Ex mice. Induction of transgene expression significantly reduced glycemic excursion during both oral and intraperitoneal glucose tolerance tests (p < 0.05) and increased levels of glucose-stimulated insulin following oral glucose administration (p < 0.05). Despite evidence that exendin-4 may induce beta-cell proliferation, beta-cell mass and islet histology were normal in MT-Ex mice. MT-Ex mice exhibited no differences in basal food intake or body weight; however, induction of exendin-4 expression was associated with reduced short term food ingestion (p < 0.05). In contrast, short term water intake was significantly reduced in the absence of zinc in fluid-restricted MT-Ex mice (p < 0.05). These findings illustrate that sustained elevation of circulating exendin-4 is not invariably associated with changes in glucose homeostasis, increased beta-cell mass, or reduction in food intake in mice in vivo.
Collapse
Affiliation(s)
- L Baggio
- Department of Laboratory Medicine and Pathobiology, Toronto General Hospital, Banting and Best Diabetes Centre, University of Toronto, Toronto, Ontario M5G 2C4
| | | | | | | | | |
Collapse
|
17
|
Baggio L, Kieffer TJ, Drucker DJ. Glucagon-like peptide-1, but not glucose-dependent insulinotropic peptide, regulates fasting glycemia and nonenteral glucose clearance in mice. Endocrinology 2000; 141:3703-9. [PMID: 11014225 DOI: 10.1210/endo.141.10.7720] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.2] [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
Glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic peptide (GIP) potentiate glucose-stimulated insulin secretion after enteral nutrient ingestion. We compared the relative incretin and nonincretin actions of GLP-1 and GIP in +/+ and GLP-1R-/- mice using exendin(9-39) and immunopurified anti-GIP receptor antisera (GIPR Ab) to antagonize GLP-1 and GIP action, respectively. Both antagonists produced a significant increase in glycemic excursion after oral glucose loading of +/+ mice (P < 0.05 for antagonists us. controls). Exendin(9-39) also increased blood glucose and decreased glucose-stimulated insulin in +/+ mice after ip glucose loading [0.58 +/- 0.02 vs. 0.47 +/- 0.02 ng/ml in saline- vs. exendin(9-39)-treated mice, respectively, P < 0.05]. In contrast, GIPR Ab had no effect on glucose excursion or insulin secretion, after ip glucose challenge, in +/+ or GLP-1R-/- mice. Repeated administration of exendin(9-39) significantly increased blood glucose and reduced circulating insulin levels but had no effect on levels of pancreatic insulin or insulin messenger RNA transcripts. In contrast, no changes in plasma glucose, circulating insulin, pancreatic insulin content, or insulin messenger RNA were observed in mice, 18 h after administration of GIPR Ab. These findings demonstrate that GLP-1, but not GIP, plays an essential role in regulating glycemia, independent of enteral nutrient ingestion in mice in vivo.
Collapse
Affiliation(s)
- L Baggio
- Department of Laboratory Medicine and Pathobiology, Banting and Best Diabetes Centre, University Health Network, Toronto General Hospital, University of Toronto, Ontario, Canada
| | | | | |
Collapse
|
18
|
Marguet D, Baggio L, Kobayashi T, Bernard AM, Pierres M, Nielsen PF, Ribel U, Watanabe T, Drucker DJ, Wagtmann N. Enhanced insulin secretion and improved glucose tolerance in mice lacking CD26. Proc Natl Acad Sci U S A 2000; 97:6874-9. [PMID: 10823914 PMCID: PMC18768 DOI: 10.1073/pnas.120069197] [Citation(s) in RCA: 430] [Impact Index Per Article: 17.9] [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: 01/30/2023] Open
Abstract
A subset of prolyl oligopeptidases, including dipeptidyl-peptidase IV (DPP IV or CD26, EC ), specifically cleave off N-terminal dipeptides from substrates having proline or alanine in amino acid position 2. This enzyme activity has been implicated in the regulation of the biological activity of multiple hormones and chemokines, including the insulinotropic peptides glucagon-like peptide 1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP). Targeted inactivation of the CD26 gene yielded healthy mice that have normal blood glucose levels in the fasted state, but reduced glycemic excursion after a glucose challenge. Levels of glucose-stimulated circulating insulin and the intact insulinotropic form of GLP-1 are increased in CD26(-/-) mice. A pharmacological inhibitor of DPP IV enzymatic activity improved glucose tolerance in wild-type, but not in CD26(-/-), mice. This inhibitor also improved glucose tolerance in GLP-1 receptor(-/-) mice, indicating that CD26 contributes to blood glucose regulation by controlling the activity of GLP-1 as well as additional substrates. These data reveal a critical role for CD26 in physiological glucose homeostasis, and establish it as a potential target for therapy in type II diabetes.
Collapse
Affiliation(s)
- D Marguet
- Centre d'Immunologie de Marseille Luminy, Institut National de la Santé et de la Recherche Médicale-Centre National de la Recherche Scientifique Case 906, Parc Scientifique de Luminy, 13288 Marseille Cedex 9, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Baggio L, Morrison M. The NAD(P)H-utilizing glutamate dehydrogenase of Bacteroides thetaiotaomicron belongs to enzyme family I, and its activity is affected by trans-acting gene(s) positioned downstream of gdhA. J Bacteriol 1996; 178:7212-20. [PMID: 8955404 PMCID: PMC178635 DOI: 10.1128/jb.178.24.7212-7220.1996] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [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: 02/03/2023] Open
Abstract
Previous studies have suggested that regulation of the enzymes of ammonia assimilation in human colonic Bacteroides species is coordinated differently than in other eubacteria. The gene encoding an NAD(P)H-dependent glutamate dehydrogenase (gdhA) in Bacteroides thetaiotaomicron was cloned and expressed in Escherichia coli by mutant complementation from the recombinant plasmid pANS100. Examination of the predicted GdhA amino acid sequence revealed that this enzyme possesses motifs typical of the family I-type hexameric GDH proteins. Northern blot analysis with a gdhA-specific probe indicated that a single transcript with an electrophoretic mobility of approximately 1.6 kb was produced in both B. thetaiotaomicron and E. coli gdhA+ transformants. Although gdhA transcription was unaffected, no GdhA enzyme activity could be detected in E. coli transformants when smaller DNA fragments from pANS100, which contained the entire gdhA gene, were analyzed. Enzyme activity was restored if these E. coli strains were cotransformed with a second plasmid, which contained a 3-kb segment of DNA located downstream of the gdhA coding region. Frameshift mutagenesis within the DNA downstream of gdhA in pANS100 also resulted in the loss of GdhA enzyme activity. Collectively, these results are interpreted as evidence for the role of an additional gene product(s) in modulating the activity of GDH enzyme activity. Insertional mutagenesis experiments which led to disruption of the gdhA gene on the B. thetaiotaomicron chromosome indicated that gdhA mutants were not glutamate auxotrophs, but attempts to isolate similar mutants with insertion mutations in the region downstream of the gdhA gene were unsuccessful.
Collapse
Affiliation(s)
- L Baggio
- Department of Animal Sciences, University of Nebraska, Lincoln 68583, USA
| | | |
Collapse
|
20
|
Abstract
Type-B leukemogenic retrovirus (TBLV) is a replication-competent type-B thymotropic retrovirus which lacks a transforming gene and whose genome is > 98% homologous to that of type-B mouse mammary tumor virus (MMTV). In contrast to MMTV, which induces mammary adenocarcinomas, TBLV induces a high incidence of T-cell thymic lymphomas in mice after a very short latent period. To investigate the molecular mechanisms by which TBLV induces T-cell lymphomas, we screened TBLV-induced tumor DNA for the frequent disruption of a particular cellular locus by TBLV proviral copies. In approximately 20% of the 55 primary tumors screened, the presence of proviruses in a common integration site was detected. This locus spans at least 53 kb of genomic DNA and maps to the mouse X chromosome. The presence of a functional gene at this locus is suggested by the conservation of nucleotide sequences from this locus among diverse animal species and by the expression of these sequences as mRNA in normal mouse tissues and tumors. The majority (17/18) of TBLV-induced primary tumors examined have elevated levels of this expressed mRNA.
Collapse
Affiliation(s)
- R E Mueller
- Department of Biochemistry, University of Western Ontario, London, Canada
| | | | | | | |
Collapse
|
21
|
Lemaire R, Duvallet A, Baggio L, Chauveau M. [The external saphenous vein and the Doppler effect]. Phlebologie 1980; 33:737-43. [PMID: 7454845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
After medium physical exertion, twelve athletes had their venous reflux measured using a Doppler fluxometer. A rise in the speed of the blood flow was recorded. This is due to the hyperactivity of the thoraco-abdominal and cardiac pumps, whose efficiency is boosted by arteriocapillary vasodilation. In some cases, this happens only in the deep system. But in others, this "arterialization" is apparent in the superficial system too, and especially in the region of the short saphenous vein. This occurs in such a way as to suggest that the deep course becomes saturated and so the reflux is redirected along the superficial course. This hypothesis is an argument in favour of the existence of vein to vein anastomosis.
Collapse
|