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Belloni M, Guihenneuc C, Rage E, Ancelet S. A Bayesian hierarchical approach to account for left-censored and missing radiation doses prone to classical measurement error when analyzing lung cancer mortality due to γ-ray exposure in the French cohort of uranium miners. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2020; 59:423-437. [PMID: 32567014 DOI: 10.1007/s00411-020-00859-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 06/13/2020] [Indexed: 06/11/2023]
Abstract
Epidemiological data on cohorts of occupationally exposed uranium miners are currently used to assess health risks associated with chronic exposure to low doses of ionizing radiation. Nevertheless, exposure uncertainty is ubiquitous and questions the validity of statistical inference in these cohorts. This paper highlights the flexibility and relevance of the Bayesian hierarchical approach to account for both missing and left-censored (i.e. only known to be lower than a fixed detection limit) radiation doses that are prone to measurement error, when estimating radiation-related risks. Up to the authors' knowledge, this is the first time these three sources of uncertainty are dealt with simultaneously in radiation epidemiology. To illustrate the issue, this paper focuses on the specific problem of accounting for these three sources of uncertainty when estimating the association between occupational exposure to low levels of γ-radiation and lung cancer mortality in the post-55 sub-cohort of French uranium miners. The impact of these three sources of dose uncertainty is of marginal importance when estimating the risk of death by lung cancer among French uranium miners. The corrected excess hazard ratio (EHR) is 0.81 per 100 mSv (95% credible interval: [0.28; 1.75]). Interestingly, even if the 95% credible interval of the corrected EHR is wider than the uncorrected one, a statistically significant positive association remains between γ-ray exposure and the risk of death by lung cancer, after accounting for dose uncertainty. Sensitivity analyses show that the results obtained are robust to different assumptions. Because of its flexible and modular nature, the Bayesian hierarchical models proposed in this work could be easily extended to account for high proportions of missing and left-censored dose values or exposure data, prone to more complex patterns of measurement error.
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Abstract
Complications in apheresis affect on the average 40% of treated patients and 10-14% of the procedures. The mortality rate is 1/500 treated patients. The utilization of more complex techniques, central catheters, plasma infusion and even more the superimposition of different factors increase the incidence and gravity of side effects. Very influent are also the underlying pathologies and the clinical conditions; particularly at risk are patients with TTP/HUS and GBS. However, PE represents a relatively safe therapy in which prevention of complications requires a particularly diligent personnel and a careful evaluation of indications.
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Belloni M, Almeida Paz ICL, Nääs IA, Alves MCF, Garcia RG, Caldara FR, Seno LO. Productive, Qualitative, and Physiological Aspects of Layer Hens Fed with Propolis. BRAZILIAN JOURNAL OF POULTRY SCIENCE 2015. [DOI: 10.1590/1516-635x1704467-472] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Felix GA, Almeida Paz ICL, Piovezan U, Garcia RG, Lima KAO, Nääs IA, Salgado DD, Pilecco M, Belloni M. Feeding behavior and crop damage caused by capybaras (Hydrochoerus hydrochaeris) in an agricultural landscape. BRAZ J BIOL 2014; 74:779-86. [PMID: 25627586 DOI: 10.1590/1519-6984.02113] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Accepted: 11/13/2013] [Indexed: 11/22/2022] Open
Abstract
This study aimed to assess the yield loss caused by capybaras in rural areas of Dourados-MS, their feeding periods, crop preferences and the landscape characteristics of farms that may affect the occurrence of capybara's herds. Semi-structured interviews in 24 different farms were done during a period between April 2010 and August 2011. Field observations were held at different times of the day, and also during the night in order to record peaks of the feeding behavior in six farms. Direct counting of capybaras along with the group of animals reported as seen by the farmers during the interviews was used to estimate the size of herds. Data was analyzed using the Principal Components Analyses and the Analytic Hierarchy Process. The average number of capybaras found in a regular herd was 18.8 ± 7.90 animals. The average number of capybara herd by farms was of 1.38 ± 0.92 while the average number of capybaras by farms was 32.33 ± 27.87. Capybaras selected rice (Oryza sativa) when it was available (14.5% of devastation in 1.18% of total planted area); however, the most eaten crop was corn (Zea mays) with 38.55% of loss rate in 16.17% of the total planted area. Capybaras ate mostly in the evening and during the night. The availability of water resources in the rural area predisposed the occurrence of capybara's herds.
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Winck FV, Belloni M, Pauletti BA, Zanella JDL, Domingues RR, Sherman NE, Paes Leme AF. Phosphoproteome analysis reveals differences in phosphosite profiles between tumorigenic and non-tumorigenic epithelial cells. J Proteomics 2013; 96:67-81. [PMID: 24211406 DOI: 10.1016/j.jprot.2013.10.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 09/16/2013] [Accepted: 10/29/2013] [Indexed: 11/18/2022]
Abstract
UNLABELLED Oral cancer disease represents a significant fraction of all human cancer types and its poor early diagnosis contributes to reduced individual survival rate. The identification of proteins modulated in tumorigenic cells and its post-translational modifications may improve our understanding of tumor development in epithelial cells. We have analyzed the phosphoproteome of tumorigenic (SCC-9) and non-tumorigenic (HaCaT) cell lines using MS-based approach in order to identify phosphopeptides with differing patterns of modifications and/or abundance. Our results revealed the identity of 4,206 protein phosphorylation sites with sixty-two sites showing to be significantly modulated between the two cell lines. The phosphoproteome data showed an overrepresentation of proteins with a possible role in nuclear regulatory functions. Pathway analysis was further performed on the phosphoproteome dataset and differences and commonalities of the functional pathways present in tumorigenic and non-tumorigenic cells were identified. Phosphopeptides that belong to the proteins lamina-associated polypeptide 2 isoform alpha and serine-arginine repetitive matrix protein 2 were identified with differential abundance and they appear as promising tumor-related phosphopeptides. These two proteins may be related to the structural alterations generally found in the nucleus of tumorigenic cells. The identification of phosphorylation sites in tumorigenic cells may contribute to disclose novel signaling mechanisms associated with OSCC. SIGNIFICANCE Oral Squamous Cell Carcinoma (OSCC) is an important cancer disease affecting thousands of people worldwide. Many cellular processes related to the development of oral cancer remain unknown; however, the studies performed in vitro with cancer cells have contributed to guide more specific research which may be further performed by using in vivo approaches or clinical samples. To our knowledge, only few studies have been published showing the results of phosphoproteome profiling of squamous cell carcinoma models, and many signaling proteins must be identified and functionally characterized in order to increase the knowledge available about the complexity of the signaling networks responsible for oral cancer development and its progression. Furthermore, our knowledge regarding proteins exclusive or very low abundant in cancer cells remains limited. A better understanding of the differences between signaling pathways present in epithelial cell lines may contribute to reveal the processes underlying the OSCC.
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Manickam M, Iqbal P, Belloni M, Kumar S, Preece JA. A Brief Review of Carbazole-Based Photorefractive Liquid Crystalline Materials. Isr J Chem 2012. [DOI: 10.1002/ijch.201200058] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Aragão AZB, Belloni M, Simabuco FM, Zanetti MR, Yokoo S, Domingues RR, Kawahara R, Pauletti BA, Gonçalves A, Agostini M, Graner E, Coletta RD, Fox JW, Leme AFP. Novel processed form of syndecan-1 shed from SCC-9 cells plays a role in cell migration. PLoS One 2012; 7:e43521. [PMID: 22905270 PMCID: PMC3419706 DOI: 10.1371/journal.pone.0043521] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Accepted: 07/23/2012] [Indexed: 12/15/2022] Open
Abstract
The extracellular milieu is comprised in part by products of cellular secretion and cell surface shedding. The presence of such molecules of the sheddome and secretome in the context of the extracellular milieu may have important clinical implications. In cancer they have been hypothesized to play a role in tumor growth and metastasis. The objective of this study was to evaluate whether the sheddome/secretome from two cell lines could be correlated with their potential for tumor development. Two epithelial cell lines, HaCaT and SCC-9, were chosen based on their differing abilities to form tumors in animal models of tumorigenesis. These cell lines when stimulated with phorbol-ester (PMA) showed different characteristics as assessed by cell migration, adhesion and higher gelatinase activity. Proteomic analysis of the media from these treated cells identified interesting, functionally relevant differences in their sheddome/secretome. Among the shed proteins, soluble syndecan-1 was found only in media from stimulated tumorigenic cells (SCC-9) and its fragments were observed in higher amount in the stimulated tumorigenic cells than stimulated non-tumorigenic cells (HaCaT). The increase in soluble syndecan-1 was associated with a decrease in membrane-bound syndecan-1 of SCC-9 cells after PMA stimuli. To support a functional role for soluble syndecan-1 fragments we demonstrated that the synthetic syndecan-1 peptide was able to induce cell migration in both cell lines. Taken together, these results suggested that PMA stimulation alters the sheddome/secretome of the tumorigenic cell line SCC-9 and one such component, the syndecan-1 peptide identified in this study, was revealed to promote migration in these epithelial cell lines.
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Ferreira VMOS, Francisco NS, Belloni M, Aguirre GMZ, Caldara FR, Nääs IA, Garcia RG, Almeida Paz ICL, Polycarpo GV. Infrared thermography applied to the evaluation of metabolic heat loss of chicks fed with different energy densities. BRAZILIAN JOURNAL OF POULTRY SCIENCE 2011. [DOI: 10.1590/s1516-635x2011000200005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Mandressi A, Buizza C, Antonelli D, Belloni M, Chisena S, Zaroli A, Bernasconi S. Retro-extraperitoneal laparoscopic approach to excise retroperitoneal organs: Kidney and adrenal gland. ACTA ACUST UNITED AC 2009. [DOI: 10.3109/13645709309152957] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Memo M, Pizzi M, Belloni M, Benarese M, Spano P. Activation of Dopamine D2 Receptors Linked to Voltage-Sensitive Potassium Channels Reduces Forskolin-Induced Cyclic AMP Formation in Rat Pituitary Cells. J Neurochem 2006; 59:1829-35. [PMID: 1357100 DOI: 10.1111/j.1471-4159.1992.tb11016.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
3,4-Dihydroxyphenylethylamine (dopamine) D2 receptor agonists, including BHT 920 and bromocriptine, and the potassium channel opener minoxidil share the property of hyperpolarizing the plasma membrane by activating voltage-dependent potassium channels. These drugs were tested for their ability to inhibit the cyclic AMP formation induced by forskolin either in intact or in broken pituitary cells. In contrast to bromocriptine, which was active in both experimental systems, BHT 920 and minoxidil inhibited the forskolin-induced cyclic AMP formation in intact-cell but not in broken-cell preparations. The effects of BHT 920 were (a) concentration dependent, with a calculated IC50 of 0.7 microM, (b) dopaminergic in nature, being specifically antagonized by sulpiride, (c) not additive with those induced by minoxidil, and (d) less effective in the presence of potassium channel blockers, such as 4-aminopyridine and tetraethylammonium. These data indicate that the inhibition of forskolin-induced cyclic AMP formation by BHT 920 in intact pituitary cells is not a primary consequence of receptor occupation, but a late event, possibly related to the opening of voltage-dependent potassium channels elicited by this drug through the activation of a subtype of dopamine D2 receptors uncoupled to adenylyl cyclase.
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Christian W, Belloni M, Brown D. An Open-Source XML Framework for Authoring Curricular Material. Comput Sci Eng 2006. [DOI: 10.1109/mcse.2006.82] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Cimaschi D, De Cesare V, Pulcini G, Cervi E, Belloni M, Liserre B, Cervi GC. [A case of amputation neuroma of the bile duct following video-laparoscopic cholecystectomy]. G Chir 2006; 27:31-6. [PMID: 16608630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
We report a case of neuroma of the common hepatic duct arising five years after cholecystectomy (laparoscopic then converted in laparotomy). A 73-years-old patient was admitted for obstructive jaundice. Ultrasonography, TC and cholangiography showed a nodular lesion of the common hepatic of 1 cm in diameter, causing a regular and important stenosis of the main bile duct. Histologic examination demonstrated neuroma. By the analysis of this and 42 other previously published cases, the following features of bile duct neuroma were outlined: 1) variable interval between cholecystectomy and the onset of jaundice (2 months to 40 years); 2) the same incidence after laparoscopic or laparotomic cholecystectomy; 3) the generally complicated postoperative course after first surgical approach; 4) the various localizations on the biliary tree (cystic, main bile duct, intrahepatic ducts); 5) the circumstances of onset are almost the same (obstructive jaundice); 6) the histologic examination is mandatory for a correct diagnosis; and 7) the best treatment is resection of the bile duct tract involved in neuroma and reconstruction of biliary tree with hepaticojejunostomy.
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Raimondi R, Soli M, Lamparelli T, Bacigalupo A, Arcese W, Belloni M, Rodeghiero F. ABO-incompatible bone marrow transplantation: a GITMO survey of current practice in Italy and comparison with the literature. Bone Marrow Transplant 2005; 34:321-9. [PMID: 15235580 DOI: 10.1038/sj.bmt.1704579] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
ABO incompatibility is not considered a contraindication for allogeneic haematopoietic stem cell transplantation (HSCT) despite its association with several immunohaematological complications. At present, there is no general agreement concerning the best methods to reduce these problems. To survey current practice related to ABO-incompatible HSCT in Italy, a questionnaire was sent to all GITMO centres. Specific questions were addressed for management in pretransplant, peritransplant and post transplant phases. A comparison was made with the experience reported in the literature. In all, 74% of GITMO centres answered the questionnaire. A high degree of heterogeneity concerning the pretransplant tests, methods to overcome infusion of ABO-incompatible marrow and post transplant transfusion policy and monitoring was evident. For many of these aspects the literature does not contain unanimous guidelines. The considerable degree of heterogeneity that reflects, at least partially, the lack of consensus in the literature demonstrates that ABO incompatibility is still an open issue in the setting of HSCT and that further studies are needed for a more rationale approach and for the production of evidence-based guidelines.
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Soli M, Blanco L, Riggert J, Martínez-Clavel A, Lucas C, Lunghi M, Belloni M, Wolf C, van Waeg G, Antoon M. A multicentre evaluation of a new filtration protocol for leucocyte depletion of high-haematocrit red blood cells collected by an automated blood collection system. Vox Sang 2002; 81:108-12. [PMID: 11555470 DOI: 10.1046/j.1423-0410.2001.00078.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND OBJECTIVES A multicentre trial was set up to evaluate the performance of a new leucodepletion protocol. MATERIALS AND METHODS Filtration at high haematocrit was started during collection of red blood cell (RBC) products by apheresis with Trima. SAG-M was added after filtration through the filter. Haematocrits and haemoglobin of the filtered RBCs were measured. Residual leucocytes were determined by Nageotte counting. RESULTS One-hundred and forty seven procedures were carried out. The haematocrit and haemoglobin contents were 57.3 +/- 3.0% and 55.1 +/- 4.3 g/unit, respectively. All products showed low residual leucocyte levels (< or = 0.75 x 106/unit; 99.31% < 1 x 106). CONCLUSION Immediate, on-line, high-haematocrit filtration of red cells collected on Trima resulted in leucoreduced RBCs, which met the AABB and Council of Europe criteria.
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Rassu M, Lauro FM, Cazzavillan S, Bonoldi E, Belloni M, Bettini MC, Pilotto A, Mengoli C, Peron A, Zambello R, Scagnelli M, Bertoloni G. Detection of Chlamydophila pneumoniae DNA in peripheral blood mononuclear cells of blood donors in the north-east of Italy. Med Microbiol Immunol 2001; 190:139-44. [PMID: 11827203 DOI: 10.1007/s004300100092] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Recent studies have implicated Chlamydia pneumoniae (now Chlamydophila pneumoniae) in the pathogenesis of atherosclerosis and demonstrated its presence within human peripheral blood mononuclear cells (PBMCs). In this study the presence of C. pneumoniae DNA was assessed, using nested PCR, in PBMCs from 169 active blood donors as a function of age, of specific antibodies and C-reactive protein. The results obtained demonstrated a high degree of global positivity (46.15%), which was higher in females (52%) than in males (43.7%). Seroepidemiological studies showed a high percentage of positivity both in subjects positive by PCR (65.91%) and negative by PCR (71.74%). The clinical implication of such finding are under study.
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Perini P, Tagliaferri C, Belloni M, Biasi G, Gallo P. The HLA-DR13 haplotype is associated with "benign" multiple sclerosis in northeast Italy. Neurology 2001; 57:158-9. [PMID: 11445652 DOI: 10.1212/wnl.57.1.158] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Ruggeri A, Comai G, Belloni M, Zanella A. A simulation study for the design of a control system for the blood concentration process in autotransfusion. Ann Biomed Eng 2000; 28:470-82. [PMID: 10870904 DOI: 10.1114/1.285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Autotransfusion is the process in which a patient serves as his or her own blood donor; its most important application is the intraoperative blood salvage, in which the blood collected during a surgical operation is filtered, concentrated, washed, and then reinfused. In an automatic autotransfusion device, such as the DIDECO Compact Advanced, red blood cells (RBCs) are separated from the other unwanted components and concentrated by using a rotating bowl and the effect of centrifugal force. An important characteristic of concentrated RBCs is their hematocrit (Hct), i.e., percent RBC volume divided by total blood volume. The aim of this study is to assess the feasibility of a controller, based on the artificial neural network approach, which is able to provide a closed loop control of the hematocrit of the blood in the bowl at the end of the concentration phase. A simulation approach was adopted both for training the network and for assessing its performances. The results obtained are quite satisfactory, since the target Hct was typically reached within a 3% error, and always within 6% in highly challenging situations.
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Belloni M, Uberti D, Rizzini C, Ferrari-Toninelli G, Rizzonelli P, Jiricny J, Spano P, Memo M. Distribution and kainate-mediated induction of the DNA mismatch repair protein MSH2 in rat brain. Neuroscience 2000; 94:1323-31. [PMID: 10625070 DOI: 10.1016/s0306-4522(99)00380-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
DNA repair is one of the most essential systems for maintaining the inherited nucleotide sequence of genomic DNA over time. Repair of DNA damage would be particularly important in neurons, because these cells are among the longest-living cells in the body. MSH2 is one of the proteins which are involved in the recognition and repair of a specific type of DNA damage that is characterized by pair mismatches. We studied the distribution of MSH2 in rat brain by immunohistochemical analysis. We found the level of MSH2 expression in rat brain to be clearly heterogeneous. The highest intensity of staining was found in the pyramidal neurons of the hippocampus and in the entorhinal and frontoparietal cortices. Positive cells were observed in the substantia nigra pars compacta, in cerebellar granular and Purkinje cells, and in the motor neurons of the spinal cord. We investigated the possible modulation of MSH2 expression after injection of kainate. Systemic administration of kainate induces various behavioural alterations and a typical pattern of neuropathology, with cell death in the hippocampal pyramidal neurons of the CA3/CA4 fields. Kainate injection also resulted in a marked, dose-dependent increase of MSH2 immunoreactivity in the hippocampal neurons of the CA3/CA4 fields. The effect was specific, since no changes in immunoreactivity were detected in the dentate gyrus nor in other brain areas. In summary, our data suggest that a mismatch DNA repair system, of which MSH2 protein is a representative component, is heterogeneously expressed in the rat brain and specifically induced by an experimental paradigm of excitotoxicity.
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Belloni M, Uberti D, Rizzini C, Jiricny J, Memo M. Induction of two DNA mismatch repair proteins, MSH2 and MSH6, in differentiated human neuroblastoma SH-SY5Y cells exposed to doxorubicin. J Neurochem 1999; 72:974-9. [PMID: 10037468 DOI: 10.1046/j.1471-4159.1999.0720974.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The MutS homologues MSH2 and MSH6 form a heterodimeric protein complex that is involved in the recognition of base/base mismatches and insertion/deletion loops, as well as some other types of DNA damage. We investigated the expression of these proteins in undifferentiated and retinoic acid-differentiated human neuroblastoma SH-SY5Y cells by immunocytochemistry, western blot analysis, and RT-PCR. Nuclei from undifferentiated SH-SY5Y cells were found to be immunoreactive to anti-MSH2 and anti-MSH6 antibodies. Following differentiation, the cells stop dividing and change morphology to acquire a neuron-like phenotype. Under these conditions, both anti-MSH2 and anti-MSH6 immunoreactivities were still detectable, although the signals were somewhat less intense. When these cells were exposed for 2 h to neurotoxic concentrations of doxorubicin (50 nM), they exhibited a marked and homogeneous increase of both anti-MSH2 and anti-MSH6 immunoreactivities. As revealed by western blot analysis, these effects were associated with increased protein content and were dose-dependent. Using RT-PCR technology, we also found that doxorubicin treatment did not change MSH2 or MSH6 mRNA levels. Our data indicate that human postmitotic, neuron-like cells constitutively express the molecular machinery devoted to recognition of DNA mismatches and that this system is activated by specific treatment leading to cell death. These findings might help clarify the molecular mechanisms underlying various human neurological diseases that are associated with deficiencies in DNA repair and/or a high rate of DNA damage acquisition.
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Bonardelli S, Tiberio GA, Belloni M, Rampinelli LA, Nodari F, Coniglio A, Pouché A, Giulini SM. [Splanchnic aneurysms: 10 treated cases and review of the literature]. Ann Ital Chir 1998; 69:325-30. [PMID: 9835104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
The splanchnic aneurysms, which are complicated by rupture in 25% of cases with a mortality of 25-70%, are usually a surprise during diagnostic tests for other abdominal pathologies or emergency laparotomies. 10 cases treated (8 in elective and 2 in emergency surgery) are presented here: the aneurysm was in celiac trunk (1 patient), common hepatic artery (1 pt.), hepatic artery (2 pts.), gastroduodenal artery (1 pt.), superior mesenteric artery (1 pt.), inferior pancreaticoduodenal artery (1 pt.), right colic artery (1 pt.) and inferior mesenteric artery (1 pt.). There were 1 case of Marfan syndrome and 9 cases of atherosclerosis, 4 of which arteries presenting hyperdynamic flow consequent to occlusions of the superior mesenteric artery and/or the celiac trunk. The 2 cases operated on for hemoperitoneum underwent aneurysmectomy and ligation of the inflow vessels (1 death from pulmonary embolism on 5th postoperative day), whereas the 8 cases electively treated (with no deaths and I case of transient diarrhoeal syndrome) underwent 4 aneurysmal resections with end-to-end arterial reconstruction, 3 PTFE-graft substitutions and 1 autologous saphenous vein substitution. At follow-up (12-74 months; mean 30.6) all the reconstructions resulted successful. These data confirm the consistent indications of the recent Literature suggesting the indication to the surgical treatment of the incidental aneurysms in the splanchnic area.
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Bonardelli S, Nodari F, Tiberio GA, Belloni M, De Lucia M, Ghilardi G, Portolani N, Guarneri B, Tomasoni G, Giulini SM. [Carotid endarterectomy in patients with neurological non-side related (NSRS) symptoms]. G Chir 1998; 19:139-42. [PMID: 9628061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Out of 970 carotid endarterectomies (CE) performed for high-grade (> 80%) stenosis of the internal carotid artery (ICA) until 1995, 147 patients with neurological non side-related symptoms (NSRS) and without any cardiac, ocular or vestibular significant pathology have been evaluated, analyzing the medium and long-term functional results (mean follow-up 37.6 months) related to the morphological status of the ICA contralateral and the vertebral arteries. NSRS disappeared in 126 pts (85.71%): contralateral ICA was non-stenotic in 32 cases (25.39%), stenotic < 75% in 68 cases (53.96%), stenotic > 75% in 7 cases (5.55%) and occluded in 19 cases (15.09%); vertebral arteries were pathological in only 6 cases (4.75%), among which 4 were on the same side and 2 on the opposite side of CE. NSRS persisted in 20 pts (13.6%): contralateral ICA was non-stenotic in 5 cases (25%), with a stenosis < 75% in 11 cases (55%) and with stenosis > 75% in 4 cases (20%); vertebral obliterative lesions were 3 (15.78%), among which 1 on the same and 2 on the opposite side of CE. No one statistical comparison among the groups of cases obtained on the ground of the status of ICA and vertebral arteries were significant (p always > 0.05 at chi-square analysis). Authors' data confirmed that high grade stenoses of ICA can cause NSRS and that CE--always performed at the aim to prevent major neurological attacks--can relieve also these functional disorders in the most of cases, independently from the status of the contralateral ICA and the vertebral arteries.
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Belloni M, Alghisi A, Bettini C, Soli M, Zampieri L. Hypotensive reactions associated with white cell-reduced apheresis platelet concentrates in patients not receiving ACE Inhibitors. Transfusion 1998; 38:412-5. [PMID: 9595028 DOI: 10.1046/j.1537-2995.1998.38498257384.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Uberti D, Belloni M, Grilli M, Spano P, Memo M. Induction of tumour-suppressor phosphoprotein p53 in the apoptosis of cultured rat cerebellar neurones triggered by excitatory amino acids. Eur J Neurosci 1998; 10:246-54. [PMID: 9753133 DOI: 10.1046/j.1460-9568.1998.00042.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We found that primary cultures of rat cerebellar granule cells, although definitely postmitotic and terminally differentiated, express the tumour-suppressor phosphoprotein p53. In particular, granule cells both expressed significant levels of p53 mRNA and positively reacted to an anti-p53 antibody, from the first day of culturing. During neurone differentiation, p53 mRNA content did not significantly change, at least up to 12 days in vitro, while p53 immunoreactivity increased gradually. p53 expression appeared to be further modulable being upregulated after stimulation of glutamate ionotropic receptors by glutamate or kainate. Although qualitatively similar, p53 induction by glutamate and kainate differed in terms of intensity and time-course. The glutamate increase of p53 immunoreactivity appeared within 30 min after the treatment and lasted for at least 2 h. Kainate-induced increase of p53 immunoreactivity was delayed, becoming apparent within 2 h and lasting for at least 8 h. Both kainate- and glutamate-induced increases of p53 immunoreactivity were prevented by the non-competitive NMDA receptor antagonist MK 801. As shown by the electrophoretic mobility shift analysis, both glutamate and kainate induced increases of p53 DNA binding activity. Blockade of p53 induction by a specific p53 antisense oligonucleotide resulted in a partial reduction of excitotoxicity with a complete inhibition of the excitatory amino acids induced apoptosis. Our data suggest that stimulation of ionotropic glutamate receptors in neurones results in a p53-dependent apoptosis.
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Buizza C, Antonelli D, Chisena S, Bernasconi S, Zaroli A, Belloni M, Mandressi A. [Conservative therapy in renal carcinoma: follow-up]. Arch Ital Urol Androl 1997; 69:93-100. [PMID: 9213499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Due to the increasing use of sophisticated imaging techniques, up to 30% of diagnosed renal cell carcinoma (RCC) are asymptomatic and diagnosed incidentally. Getting the cue from our personal survey of conservative renal surgery for renal cell carcinoma with a cancer specific survival of 95.5% after a mean follow up of 32.7 months, a review of the literature is illustrated: numerous studies have documented the technical success rate with this approach as well as long term disease free survival, comparable to that obtained by radical nephrectomy, in patients with unilateral, small, low stage tumors and normal opposite kidney. Patient selection is of extreme importance in case of partial resection in the presence of a normal contralateral kidney. The tumor must be < 3-4 cm, solitary, well delineated on CT, without invasion of the perinephric far or pyelocaliceal system (T1 and T2), easily resectable with at least 1 cm of healthy parenchyma. Only well informed patients who agree on a careful follow up after surgery can be candidates for kidney sparing surgery. In case of imperative surgery the follow up must be strict and personified for every single patient. Those patients who underwent a partial nephrectomy in presence of a normal contralateral kidney should be monitored with a conventional follow up monitored in order to detect an eventual local recurrence: 12 monthly ultrasonography and contrast enhanced CT scan alternately every 6 months for the first five years after surgery and then lifelong once a year by echography and/or CT scan.
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