@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 = {<p>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.</p>},
	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 {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 = {<p>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.</p>},
	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}
}
