@article {10783, title = {Gadolinium tissue deposition in the periodontal ligament of mice with reduced renal function exposed to Gd-based contrast agents.}, journal = {Toxicol Lett}, volume = {301}, year = {2019}, month = {2019 Feb}, pages = {157-167}, abstract = {

Gadolinium deposition in tissue is linked to nephrogenic systemic fibrosis (NSF): a rare disorder occurring in patients with severe chronic kidney disease and associated with administration of Gd-based contrast agents (GBCAs) for Magnetic Resonance Imaging (MRI). It is suggested that the GBCAs prolonged permanence in blood in these patients may result in a Gd precipitation in peripheral or central organs, where it initiates a fibrotic process. In this study we investigated new sites of retention/precipitation of Gd in a mouse model of renal disease (5/6 nephrectomy) receiving two doses (closely after each other) of a linear GBCA. Two commercial GBCAs (Omniscan{\textregistered} and Magnevist{\textregistered}) were administered at doses slightly higher than those used in clinical practice (0.7 mmol/kg body weight, each). The animals were sacrificed one month after the last administration and the explanted organs (kidney, liver, femur, dorsal skin, teeth) were analysed by X-ray fluorescence (XRF) at two synchrotron facilities. The XRF analysis with a millimetre-sized beam at the SYRMEP beamline (Elettra, Italy) produced no detectable levels of Gd in the examined tissues, with the notable exception of the incisors of the nephrectomised mice. The XRF analyses at sub-micron resolution performed at ID21 (ESRF, France) allowed to clearly localize Gd in the periodontal ligaments of teeth both from Omniscan{\textregistered} and Magnevist{\textregistered} treated nephrectomised mice. The latter results were further confirmed by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). The study prompts that prolonged permanence of GBCAs in blood may result in Gd retention in this particular muscular tissue, opening possibilities for diagnostic applications at this level when investigating Gd-related toxicities.

}, keywords = {Animals, Contrast Media, Disease Models, Animal, Dose-Response Relationship, Drug, Female, Gadolinium, Gadolinium DTPA, Magnetic Resonance Imaging, Mice, Nephrogenic Fibrosing Dermopathy, Periodontal Ligament, Renal Insufficiency, Tissue Distribution}, issn = {1879-3169}, doi = {10.1016/j.toxlet.2018.11.014}, author = {Delfino, Riccarda and Biasotto, Matteo and Candido, Riccardo and Altissimo, Matteo and Stebel, Marco and Salom{\`e}, Murielle and van Elteren, Johannes T and Vogel Miku{\v s}, Katarina and Zennaro, Cristina and {\v S}ala, Martin and Addobbati, Riccardo and Tromba, Giuliana and Pascolo, Lorella} } @article {10779, title = {Ferruginous bodies resolved by synchrotron XRF in a dog with peritoneal malignant mesothelioma.}, journal = {Environ Sci Pollut Res Int}, volume = {25}, year = {2018}, month = {2018 Dec}, pages = {35707-35714}, abstract = {

Mesothelioma is a malignant tumor mainly correlated to occupational asbestos exposure. Rare reports describe its occurrence also in animals, mainly linked to asbestos in the environment. Asbestos exposure is demonstrated by the appearance of characteristic histological hallmarks: asbestos containing ferruginous bodies that are iron-based structures forming around fibers and also other dust particles. Here we present a clinical case of a suspect of mesothelioma in the peritoneum of a dog with parallel histological observation of ferruginous bodies. To possibly correlate the dog tumor to environmental exposure, we performed X-ray fluorescence (XRF) analyses at two different synchrotrons to resolve the ferruginous bodies{\textquoteright} composition. While the histological examination diagnoses a tubulo-papillary mesothelioma, the XRF analyses show that ferruginous bodies contain Si particles, resembling formations of exogenous origin; however, the morphology is unlikely that of asbestos fibers. We speculate that the peritoneal mesothelioma of this dog could be related to environmental exposure to non-asbestos material.

}, keywords = {Animals, Asbestos, Dogs, Environmental Exposure, Immunohistochemistry, Iron, Lung, Lung Neoplasms, Male, Mesothelioma, Peritoneal Neoplasms, Silicon, Spectrometry, X-Ray Emission, Synchrotrons}, issn = {1614-7499}, doi = {10.1007/s11356-018-3521-x}, author = {Pascotto, Ernesto and Gianoncelli, Alessandra and Calligaro, Carla and Marcuzzo, Thomas and Melato, Mauro and Rizzardi, Clara and Pascolo, Lorella} } @article {10806, title = {Iron-related toxicity of single-walled carbon nanotubes and crocidolite fibres in human mesothelial cells investigated by Synchrotron XRF microscopy.}, journal = {Sci Rep}, volume = {8}, year = {2018}, month = {2018 01 15}, pages = {706}, abstract = {

Carbon nanotubes (CNTs) are promising products in industry and medicine, but there are several human health concerns since their fibrous structure resembles asbestos. The presence of transition metals, mainly iron, in the fibres seems also implicated in the pathogenetic mechanisms. To unravel the role of iron at mesothelial level, we compared the chemical changes induced in MeT-5A cells by the exposure to asbestos (crocidolite) or CNTs at different content of iron impurities (raw-SWCNTs, purified- and highly purified-SWCNTs). We applied synchrotron-based X-Ray Fluorescence (XRF) microscopy and soft X-ray imaging (absorption and phase contrast images) to monitor chemical and morphological changes of the exposed cells. In parallel, we performed a ferritin assay. X-ray microscopy imaging and XRF well localize the crocidolite fibres interacting with cells, as well as the damage-related morphological changes. Differently, CNTs presence could be only partially evinced by low energy XRF through carbon distribution and sometimes iron co-localisation. Compared to controls, the cells treated with raw-SWCNTs and crocidolite fibres showed a severe alteration of iron distribution and content, with concomitant stimulation of ferritin production. Interestingly, highly purified nanotubes did not altered iron metabolism. The data provide new insights for possible CNTs effects at mesothelial/pleural level in humans.

}, keywords = {Asbestos, Crocidolite, Cell Line, Epithelial Cells, Humans, Iron, Microscopy, Fluorescence, Nanotubes, Carbon}, issn = {2045-2322}, doi = {10.1038/s41598-017-19076-1}, author = {Cammisuli, Francesca and Giordani, Silvia and Gianoncelli, Alessandra and Rizzardi, Clara and Radillo, Lucia and Zweyer, Marina and Da Ros, Tatiana and Salom{\`e}, Murielle and Melato, Mauro and Pascolo, Lorella} } @article {10442, title = {Light element distribution in fresh and frozen-thawed human ovarian tissues: a preliminary study.}, journal = {Reprod Biomed Online}, volume = {37}, year = {2018}, month = {2018 08}, pages = {153-162}, abstract = {

RESEARCH QUESTION: Does synchrotron X-ray fluorescence (XRF) provide novel chemical information for the evaluation of human ovarian tissue cryopreservation protocols?

DESIGN: Tissues from five patients undergoing laparoscopic surgery for benign gynaecological conditions were fixed for microscopic analysis either immediately or after cryopreservation. After fixation, fresh and slowly frozen samples were selected by light microscopy and transmission electron microscopy, and subsequently analysed with synchrotron XRF microscopy at different incident energies.

RESULTS: The distributions of elements detected at 7.3 keV (S, P, K, Cl, Fe, and Os) and 1.5 keV (Na and Mg) were related to the changes revealed by light microscopy and transmission electron microscopy analyses. The light elements showed highly informative findings. The S distribution was found to be an indicator of extracellular component changes in the stromal tissues of the freeze-stored samples, further revealed by the transmission electron microscopy analyses. Low-quality follicles, frequent in the freeze-thawed tissues, showed a high Na level in the ooplasm. On the contrary, good-quality follicles were detected by a homogeneous Cl distribution. The occurrence of vacuolated follicles increased after cryopreservation, and the XRF analyses showed that the vacuolar structures contained mainly Cl and Na.

CONCLUSIONS: The study demonstrates that elemental imaging techniques, particularly revealing the distribution of light elements, could be useful in establishing new cryopreservation protocols.

}, keywords = {Cryopreservation, Female, Humans, Microscopy, Electron, Transmission, Organ Preservation, Ovarian Follicle, Ovary}, issn = {1472-6491}, doi = {10.1016/j.rbmo.2018.04.051}, author = {Pascolo, Lorella and Venturin, Irene and Gianoncelli, Alessandra and Bortul, Roberta and Zito, Gabriella and Giolo, Elena and Salom{\`e}, Murielle and Bedolla, Diana E and Altissimo, Matteo and Zweyer, Marina and Ricci, Giuseppe} } @article {10457, title = {Avoiding Ethanol Presence in DNA Samples Enhances the Performance of Ultraviolet Resonance Raman Spectroscopy Analysis.}, journal = {Appl Spectrosc}, volume = {71}, year = {2017}, month = {2017 Jan}, pages = {152-155}, abstract = {

Ethanol is an essential chemical reagent in DNA preparation as its use increases the yield of extraction. All methodologies for DNA isolation involve the use of ethanol in order to prevent DNA dissolution in water and to optimize the binding of DNA to chromatographic membranes. In this note, we show how the presence of ethanol traces in DNA aqueous solution affects ultraviolet Raman spectra, leading to possible misinterpretations. We report a simple method to remove the ethanol Raman features from the spectra, based on heating the DNA sample at 80 {\textcelsius}, followed by a slow cooling procedure.

}, keywords = {DNA, Ethanol, Female, Humans, Placenta, Pregnancy, Spectrophotometry, Ultraviolet, Spectrum Analysis, Raman}, issn = {1943-3530}, doi = {10.1177/0003702816654152}, author = {Cammisuli, Francesca and Pascolo, Lorella and Morgutti, Marcello and Gessini, Alessandro and Masciovecchio, Claudio and D{\textquoteright}Amico, Francesco} } @article {10552, title = {Combined use of AFM and soft X-ray microscopy to reveal fibres{\textquoteright} internalization in mesothelial cells.}, journal = {Analyst}, volume = {142}, year = {2017}, month = {2017 May 30}, pages = {1982-1992}, abstract = {

Nanotoxicology and nanomedicine investigations often require the probing of nano-objects such as fibres and particles in biological samples and cells, whilst internalization and intracellular destiny are the main issues for in vitro cellular studies. Various high resolution microscopy techniques are well suited for providing this highly sought-after information. However, sample preparation, nanomaterial composition and sectioning challenges make it often difficult to establish whether the fibres or particles have been internalized or they are simply overlaying or underlying the biological matter. In this paper we suggest a novel suitable combination of two different microscopic techniques to reveal in intact cells the uptake of asbestos fibres by mesothelial cells. After exposure to asbestos fibres and fixation, cells were first analysed under the AFM instrument and then imaged under the TwinMic soft X-ray microscope at Elettra Sincrotrone. The suggested approach combines standard soft X-ray microscopy imaging and AFM microscopy, with a common non-invasive sample preparation protocol which drastically reduces the experimental uncertainty and provides a quick and definitive answer to the nanoparticle cellular and tissue uptake.

}, keywords = {Asbestos, Cell Line, Epithelial Cells, Epithelium, Humans, Microscopy, Atomic Force, X-Rays}, issn = {1364-5528}, doi = {10.1039/c6an02661c}, author = {Gianoncelli, Alessandra and Kourousias, George and Cammisuli, Francesca and Cassese, Damiano and Rizzardi, Clara and Radillo, Oriano and Lazzarino, Marco and Pascolo, Lorella} } @article {10520, title = {Puzzling Results from Germline Mutations Analysis in a Group of Asbestos-Exposed Patients in a High-risk Area of Northeast Italy.}, journal = {Anticancer Res}, volume = {37}, year = {2017}, month = {2017 06}, pages = {3073-3083}, abstract = {

BACKGROUND: Germline mutations of the oncosuppressor gene breast cancer 1-associated protein 1 (BAP1) were recently related to an autosomal-dominant tumor predisposition syndrome (BAP1-TPDS), characterized by uveal melanoma, malignant mesothelioma (MM), cutaneous melanoma, and other malignancies. The demonstration that BAP1 mutations are strongly associated with MM has provided a real breakthrough in the study of genetic predisposition in MM, that may explain why only a fraction of asbestos-exposed individuals go on to develop MM.

MATERIALS AND METHODS: To evaluate the possible role of BAP1 mutations in the epidemiology of sporadic MM, and their relationship with asbestos exposure, we determined the prevalence of germline BAP1 mutations by the Sanger method in a group of 29 asbestos-exposed patients, 21 of which were diagnosed with MM. They were residents of Trieste, a ship-building town in Northeast Italy with a very high incidence of mesothelioma.

RESULTS: We identified non-obviously pathogenetic germline sequence variants of BAP1 in 3/29 patients and in 2/21 MM cases (10\%).

CONCLUSION: Non obviously pathogenic germline sequence variants of BAP1 were found. Nevertheless, limitations of predictive web tools allowed us to comment on some interesting peculiarities of our findings.

}, keywords = {Aged, Aged, 80 and over, Asbestos, Environmental Exposure, Female, Germ-Line Mutation, Humans, Italy, Lung Neoplasms, Male, Mesothelioma, Middle Aged, Risk, Tumor Suppressor Proteins, Ubiquitin Thiolesterase}, issn = {1791-7530}, doi = {10.21873/anticanres.11663}, author = {Rizzardi, Clara and Athanasakis, Emmanouil and Cammisuli, Francesca and Monego, Simeone Dal and DE Spelorzi, Yeraldin Chiquinquira Castillo and Costantinides, Fulvio and Giudici, Fabiola and Pinamonti, Maurizio and Canzonieri, Vincenzo and Melato, Mauro and Pascolo, Lorella} } @article {8305, title = {Fecal Calprotectin: Diagnostic Accuracy of the Immunochromatographic CalFast Assay in a Pediatric Population.}, journal = {J Clin Lab Anal}, year = {2016}, month = {2016 Feb 15}, abstract = {

BACKGROUND: Fecal calprotectin is a noninvasive marker for bowel diseases and it is high valuable to follow disease activity in Crohn{\textquoteright}s disease (CD) and ulcerative colitis (UC). In this study, we evaluated the diagnostic performance of the recently introduced immunochromatographic assay CalFast in comparison to the well-known ELISA tests for calprotectin assay to obtain a rapid diagnosis of bowel inflammation in pediatric patients.

METHODS: CalFast was tested in parallel to the classic ELISA tests CalPrest and PhiCal (gold standards for the calprotectin determination) on 148 fecal samples from pediatric subjects including 104 healthy subjects, 29 with CD, and 15 with UC.

RESULTS: In this study, the sensitivity and specificity of CalFast, CalPrest, and PhiCal were 86.4\%, 88.6\%, and 93.2\% and 86.6\%, 74\%, and 64.4\%, respectively. The area under the curve, obtained from receiver operating characteristic analysis, indicated the lack of significant difference among all the kits used.

CONCLUSION: The immunochromatographic assay demonstrated good diagnostic predictive values, comparable to those of the ELISA methods, and may represent a valid alternative in order to save operators{\textquoteright} time. The test, in fact, has a short turnaround time and does not need a specific ELISA instrumentation.

}, issn = {1098-2825}, doi = {10.1002/jcla.21886}, author = {Radillo, Oriano and Pascolo, Lorella and Martelossi, Stefano and Dal Bo, Sara and Ventura, Alessandro} } @article {8312, title = {Histopathological data of iron and calcium in the mouse lung after asbestos exposure.}, journal = {Data Brief}, volume = {6}, year = {2016}, month = {2016 Mar}, pages = {769-75}, abstract = {

This data article contains data related to the research article entitled, "Synchrotron X-ray microscopy reveals early calcium and iron interaction with crocidolite fibers in the lung of exposed mice" [1]. Asbestos fibers disrupt iron homeostasis in the human and mouse lung, leading to the deposition of iron (Fe) onto longer asbestos fibers which forms asbestos bodies (AB) [2]. Similar to Fe, calcium (Ca) is also deposited in the coats of the AB. This article presents data on iron and calcium in the mouse lung after asbestos exposure detected by histochemical evaluation.

}, issn = {2352-3409}, doi = {10.1016/j.dib.2016.01.026}, author = {Trevisan, Elisa and Zabucchi, Giuliano and Pascolo, Lorella and Pascotto, Ernesto and Casarsa, Claudia and Lucattelli, Monica and Lungarella, Giuseppe and Cavarra, Eleonora and Bartalesi, Barbara and Zweyer, Marina and Borelli, Violetta} } @article {8317, title = {Pitfalls and promises in FTIR spectromicroscopy analyses to monitor iron-mediated DNA damage in sperm.}, journal = {Reprod Toxicol}, volume = {61}, year = {2016}, month = {2016 Jun}, pages = {39-46}, abstract = {

Many drugs, chemicals, and environmental factors can impair sperm functionality by inducing DNA damage, one of the important causes of reduced fertility potential. The use of vibrational spectromicroscopy represents a promising approach for monitoring DNA integrity in sperm, although some limitations exist, depending from the experimental conditions. Here, we report that when using FTIR spectromicroscopy to reveal oxidative stress mediated by Fenton{\textquoteright}s reaction on hydrated sperm samples, DNA damage interpretation is partially compromised by unexpected cell surface precipitates. The precipitates give a broad band in the 1150-1000cm(-1) infrared region, which partially covers one of the signatures of DNA (phosphate stretching bands), and are detected as iron and oxygen containing material when using XRF spectroscopy. On the other hand, the analyses further support the potential of FTIR spectromicroscopy to reveal cellular oxidative damage events such as lipid peroxidation, protein misfolding and aggregations, as well as DNA strain breaks.

}, issn = {1873-1708}, doi = {10.1016/j.reprotox.2016.02.011}, author = {Pascolo, Lorella and Bedolla, Diana E and Vaccari, Lisa and Venturin, Irene and Cammisuli, Francesca and Gianoncelli, Alessandra and Mitri, Elisa and Giolo, Elena and Luppi, Stefania and Martinelli, Monica and Zweyer, Marina and Ricci, Giuseppe} } @article {8085, title = {Synchrotron X-ray microscopy reveals early calcium and iron interaction with crocidolite fibers in the lung of exposed mice.}, journal = {Toxicol Lett}, volume = {241}, year = {2016}, month = {2016 Jan 22}, pages = {111-20}, abstract = {

Human exposure to asbestos can cause a wide variety of lung diseases that are still a current major health concern, even if asbestos has been banned in many countries. It has been shown in many studies that asbestos fibers, ingested by alveolar macrophages, disrupt lung iron homeostasis by sequestering iron. Calcium can also be deposited on the fibers. The pathways along which iron and above all calcium interact with fibers are still unknown. Our aim was that of investigating if the iron accumulation induced by the inhaled asbestos fibers also involves calcium ions accumulation. Lung sections of asbestos-exposed mice were analyzed using an extremely sensitive procedure available at the synchrotron facilities, that provides morphological and chemical information based on X-ray fluorescence microspectroscopy (μ-XRF). In this study we show that (1) where conventional histochemical procedures revealed only weak deposits of iron and calcium, μ-XRF analysis is able to detect significant deposits of both iron and calcium on the inhaled asbestos fibers; (2) the extent of the deposition of these ions is proportionally directly related and (3) iron and calcium deposition on inhaled asbestos fibers is concomitant with the appearance of inflammatory and hyperplastic reactions.

}, issn = {1879-3169}, doi = {10.1016/j.toxlet.2015.11.016}, author = {Pascolo, Lorella and Zabucchi, Giuliano and Gianoncelli, Alessandra and Kourousias, George and Trevisan, Elisa and Pascotto, Ernesto and Casarsa, Claudia and Ryan, Chris and Lucattelli, Monica and Lungarella, Giuseppe and Cavarra, Eleonora and Bartalesi, Barbara and Zweyer, Marina and Cammisuli, Francesca and Melato, Mauro and Borelli, Violetta} } @article {7711, title = {Differential protein folding and chemical changes in lung tissues exposed to asbestos or particulates.}, journal = {Sci Rep}, volume = {5}, year = {2015}, month = {2015}, pages = {12129}, abstract = {

Environmental and occupational inhalants may induce a large number of pulmonary diseases, with asbestos exposure being the most risky. The mechanisms are clearly related to chemical composition and physical and surface properties of materials. A combination of X-ray fluorescence (μXRF) and Fourier Transform InfraRed (μFTIR) microscopy was used to chemically characterize and compare asbestos bodies versus environmental particulates (anthracosis) in lung tissues from asbestos exposed and control patients. μXRF analyses revealed heterogeneously aggregated particles in the anthracotic structures, containing mainly Si, K, Al and Fe. Both asbestos and particulates alter lung iron homeostasis, with a more marked effect in asbestos exposure. μFTIR analyses revealed abundant proteins on asbestos bodies but not on anthracotic particles. Most importantly, the analyses demonstrated that the asbestos coating proteins contain high levels of β-sheet structures. The occurrence of conformational changes in the proteic component of the asbestos coating provides new insights into long-term asbestos effects.

}, issn = {2045-2322}, doi = {10.1038/srep12129}, author = {Pascolo, Lorella and Borelli, Violetta and Canzonieri, Vincenzo and Gianoncelli, Alessandra and Birarda, Giovanni and Bedolla, Diana E and Salom{\`e}, Murielle and Vaccari, Lisa and Calligaro, Carla and Cotte, Marine and Hesse, Bernhard and Luisi, Fernando and Zabucchi, Giuliano and Melato, Mauro and Rizzardi, Clara} } @article {7706, title = {Metal accumulation in the renal cortex of a pediatric patient with sickle cell disease: a case report and review of the literature.}, journal = {J Pediatr Hematol Oncol}, volume = {37}, year = {2015}, month = {2015 May}, pages = {311-4}, abstract = {

BACKGROUND: Sickle cell disease (SCD) is a well-known multisystem illness characterized by vascular injury due to vasoocclusion and hemolysis, as well as infectious complications and iron overload, all of which contribute to high morbidity and mortality rates among children. In these patients, some authors have previously described iron cortical deposition in the kidney. We here report the first case in the literature of a girl affected by SCD showing an anomalous metal and rare element retention in the renal cortex.

CASE PRESENTATION: A 10-year-old white girl affected by SCD underwent a routine magnetic resonance imaging investigation that evidenced a reduced signal intensity in the renal cortex, compatible with hemosiderin precipitation. Histologic and elemental analyses of the hepatic and the renal biotic samples, performed with inductively coupled plasma mass spectrometry, revealed that concomitant with the high iron deposition, toxic and potentially carcinogenic elements such as nickel, magnesium, rubidium, and gadolinuim were anomalously retained particularly in the kidney.

CONCLUSIONS: The finding of rare and toxic elements in the kidney of SCD patients might be linked to the development of specific neoplastic transformations already described in this patient cohort. To be confirmed, our speculations need to be demonstrated in large sampling of patients.

}, keywords = {Anemia, Sickle Cell, Child, Female, Humans, Kidney Cortex, Metals, Spectrophotometry, Atomic}, issn = {1536-3678}, doi = {10.1097/MPH.0000000000000322}, author = {Maximova, Natalia and Zanon, Davide and Pascolo, Lorella and Zennaro, Floriana and Gregori, Massimo and Grosso, Daniele and Sonzogni, Aurelio} } @article {3476, title = {Influence of urine volume on the assessment of intestinal permeability in affected children by multiple sugar probes.}, journal = {Clin Chem Lab Med}, volume = {52}, year = {2014}, month = {2014 Feb}, pages = {227-35}, abstract = {

BACKGROUND: In this study we have looked at the reliability of a multi-sugar test in a pediatric patient population and its accuracy at small urine volumes to evaluate intestinal permeability.

METHODS: Out of 117 subjects enrolled, 31 were healthy and 86 were sick. A solution containing lactulose, rhamnose, sucrose, and sucralose was administered to subjects who were on fasting; the urine excreted during 5 h was collected and measured. Samples were analyzed by gas chromatography-tandem mass spectrometry and results were expressed as percentage of sugar recoveries and lactulose/rhamnose (L/R) ratio.

RESULTS: The analyses showed a clear effect of low urinary volumes (<=240 mL) particularly affecting rhamnose excretion in healthy subjects and sucrose and sucralose recovery in diseased children. Despite the low rhamnose recovery, as lactulose is not similarly affected, the diagnostic reliability of L/R ratio is well preserved at low diuresis conditions. However, this ratio can be useful to discriminate acute conditions vs. clinical remissions only at high urine volumes. Data also suggest potential diagnostic applicability of sucrose and sucralose in children at high urine volumes.

CONCLUSIONS: In conclusion, the multi-sugar test has a good predictivity in pediatric subjects but results must be carefully interpreted in the face of reduced diuresis.

}, keywords = {Carbohydrates, Child, Preschool, Diuresis, Female, Gas Chromatography-Mass Spectrometry, Gastrointestinal Diseases, Humans, Infant, Intestines, Lactulose, Male, Permeability, Rhamnose, Sucrose}, issn = {1437-4331}, doi = {10.1515/cclm-2013-0626}, author = {Addobbati, Riccardo and Pascolo, Lorella and Di Toro, Nicola and Sebastiani, Giulia B and Martellossi, Stefano and Not, Tarcisio} } @article {1815, title = {X-ray fluorescence elemental mapping and microscopy to follow hepatic disposition of a Gd-based magnetic resonance imaging contrast agent.}, journal = {Clin Exp Pharmacol Physiol}, volume = {38}, year = {2011}, month = {2011 Dec}, pages = {834-45}, abstract = {

1. Spatially resolved X-ray fluorescence (XRF) spectroscopy with synchrotron radiation is a technique that allows imaging and quantification of chemical elements in biological specimens with high sensitivity. In the present study, we applied XRF techniques at a macro and micro level to carry out drug distribution studies on ex vivo models to confirm the hepatobiliary disposition of the Gd-based magnetic resonance imaging contrast agent B22956/1. 2. Gd presence was selectively quantified allowing the determination of the time dependent disappearance of the drug from blood and its hepatic accumulation in mice after administration. Elemental mapping highlighted the drug distribution differences between healthy and diseased livers. XRF microanalyses showed that in CCl(4) -induced hepatitis, B22956/1 has greatly reduced hepatic accumulation, shown as a 20-fold reduction of Gd presence. Furthermore, a significant increase of Fe presence was found in steatotic compared with healthy livers, in line with the disease features. 3. The present results show that XRF might be useful in preclinical pharmacological studies with drugs containing exogenous elements. Furthermore, quantitative and high-sensitivity elemental mapping allows simultaneous detection of chemical variation, showing pathological conditions. This approach was useful in suggesting reduced B22956/1 accumulation in steatotic livers, thus opening possible new diagnostic perspectives for this drug.

}, keywords = {Animals, Contrast Media, Fatty Liver, Female, Gadolinium, Hepatitis, Iron, Liver, Magnetic Resonance Imaging, Mice, Mice, Inbred CBA, Organometallic Compounds, Spectrometry, X-Ray Emission}, issn = {1440-1681}, doi = {10.1111/j.1440-1681.2011.05618.x}, author = {Delfino, Riccarda and Altissimo, Matteo and Menk, Ralf Hendrik and Alberti, Roberto and Klatka, Tomasz and Frizzi, Tommaso and Longoni, Antonio and Salom{\`e}, Murielle and Tromba, Giuliana and Arfelli, Fulvia and Clai, Milan and Vaccari, Lisa and Lorusso, Vito and Tiribelli, Claudio and Pascolo, Lorella} }