@article {10474, title = {Cubosomes for in vivo fluorescence lifetime imaging.}, journal = {Nanotechnology}, volume = {28}, year = {2017}, month = {2017 Feb 03}, pages = {055102}, abstract = {

Herein we provided the first proof of principle for in vivo fluorescence optical imaging application using monoolein-based cubosomes in a healthy mouse animal model. This formulation, administered at a non-cytotoxic concentration, was capable of providing both exogenous contrast for NIR fluorescence imaging with very high efficiency and chemospecific information upon lifetime analysis. Time-resolved measurements of fluorescence after the intravenous injection of cubosomes revealed that the dye rapidly accumulated mainly in the liver, while lifetimes profiles obtained in vivo allowed for discriminating between free dye or dye embedded within the cubosome nanostructure after injection.

}, keywords = {Animals, Carbocyanines, Cell Survival, Drug Compounding, Erythrocytes, Female, Fluorescent Dyes, Glycerides, Humans, Injections, Intravenous, Liposomes, Liver, Mice, Mice, Inbred BALB C, Nanoparticles, NIH 3T3 Cells, Optical Imaging, Particle Size, Spectroscopy, Near-Infrared, Time-Lapse Imaging}, issn = {1361-6528}, doi = {10.1088/1361-6528/28/5/055102}, author = {Biffi, Stefania and Andolfi, Laura and Caltagirone, Claudia and Garrovo, Chiara and Falchi, Angela M and Lippolis, Vito and Lorenzon, Andrea and Macor, Paolo and Meli, Valeria and Monduzzi, Maura and Obiols-Rabasa, Marc and Petrizza, Luca and Prodi, Luca and Rosa, Antonella and Schmidt, Judith and Talmon, Yeshayahu and Murgia, Sergio} } @article {8055, title = {Functionalized synchrotron in-line phase-contrast computed tomography: a novel approach for simultaneous quantification of structural alterations and localization of barium-labelled alveolar macrophages within mouse lung samples.}, journal = {J Synchrotron Radiat}, volume = {22}, year = {2015}, month = {2015 Jan}, pages = {143-55}, abstract = {

Functionalized computed tomography (CT) in combination with labelled cells is virtually non-existent due to the limited sensitivity of X-ray-absorption-based imaging, but would be highly desirable to realise cell tracking studies in entire organisms. In this study we applied in-line free propagation X-ray phase-contrast CT (XPCT) in an allergic asthma mouse model to assess structural changes as well as the biodistribution of barium-labelled macrophages in lung tissue. Alveolar macrophages that were barium-sulfate-loaded and fluorescent-labelled were instilled intratracheally into asthmatic and control mice. Mice were sacrificed after 24 h, lungs were kept in situ, inflated with air and scanned utilizing XPCT at the SYRMEP beamline (Elettra Synchrotron Light Source, Italy). Single-distance phase retrieval was used to generate data sets with ten times greater contrast-to-noise ratio than absorption-based CT (in our setup), thus allowing to depict and quantify structural hallmarks of asthmatic lungs such as reduced air volume, obstruction of airways and increased soft-tissue content. Furthermore, we found a higher concentration as well as a specific accumulation of the barium-labelled macrophages in asthmatic lung tissue. It is believe that XPCT will be beneficial in preclinical asthma research for both the assessment of therapeutic response as well as the analysis of the role of the recruitment of macrophages to inflammatory sites.

}, keywords = {Algorithms, Allergens, Animals, Asthma, Barium Sulfate, Cell Line, Transformed, Cell Movement, Contrast Media, Disease Models, Animal, Female, Image Processing, Computer-Assisted, Imaging, Three-Dimensional, Lung, Macrophages, Alveolar, Mice, Mice, Inbred BALB C, Microscopy, Fluorescence, Ovalbumin, Synchrotrons, Tomography, X-Ray Computed}, issn = {1600-5775}, doi = {10.1107/S1600577514021730}, author = {Dullin, Christian and dal Monego, Simeone and Larsson, Emanuel and Mohammadi, Sara and Krenkel, Martin and Garrovo, Chiara and Biffi, Stefania and Lorenzon, Andrea and Markus, Andrea and Napp, Joanna and Salditt, Tim and Accardo, Agostino and Alves, Frauke and Tromba, Giuliana} } @article {7725, title = {Targeted tumor imaging of anti-CD20-polymeric nanoparticles developed for the diagnosis of B-cell malignancies.}, journal = {Int J Nanomedicine}, volume = {10}, year = {2015}, month = {2015}, pages = {4099-109}, abstract = {

The expectations of nanoparticle (NP)-based targeted drug delivery systems in cancer, when compared with convectional therapeutic methods, are greater efficacy and reduced drug side effects due to specific cellular-level interactions. However, there are conflicting literature reports on enhanced tumor accumulation of targeted NPs, which is essential for translating their applications as improved drug-delivery systems and contrast agents in cancer imaging. In this study, we characterized biodegradable NPs conjugated with an anti-CD20 antibody for in vivo imaging and drug delivery onto tumor cells. NPs{\textquoteright} binding specificity mediated by anti-CD20 antibody was evaluated on MEC1 cells and chronic lymphocytic leukemia patients{\textquoteright} cells. The whole-body distribution of untargeted NPs and anti-CD20 NPs were compared by time-domain optical imaging in a localized human/mouse model of B-cell malignancy. These studies provided evidence that NPs{\textquoteright} functionalization by an anti-CD20 antibody improves tumor pharmacokinetic profiles in vivo after systemic administration and increases in vivo imaging of tumor mass compared to non-targeted NPs. Together, drug delivery and imaging probe represents a promising theranostics tool for targeting B-cell malignancies.

}, issn = {1178-2013}, doi = {10.2147/IJN.S78995}, author = {Capolla, Sara and Garrovo, Chiara and Zorzet, Sonia and Lorenzon, Andrea and Rampazzo, Enrico and Spretz, Ruben and Pozzato, Gabriele and N{\'u}{\~n}ez, Luis and Tripodo, Claudio and Macor, Paolo and Biffi, Stefania} } @article {1781, title = {In vivo distribution of β2 glycoprotein I under various pathophysiologic conditions.}, journal = {Blood}, volume = {118}, year = {2011}, month = {2011 Oct 13}, pages = {4231-8}, abstract = {

In vitro studies have documented β2 glycoprotein I (β2GPI) binding to endothelial cells (ECs) and trophoblast using antiphospholipid antibodies. The in vivo binding of β2GPI to these cells and the conditions that favor their interaction have not been investigated. We analyzed the in vivo distribution of cyanine 5.5-labeled β2GPI in mice and evaluated the effect of pregnancy and circulating antibodies on its tissue localization. The signal was detected in the liver by whole body scan and ex vivo analysis. The β2GPI failed to bind to the vascular endothelium and reacted only with the ECs of uterine vessels. In pregnant mice the protein was localized on ECs and trophoblast at the embryo implantation sites. Immunized mice showed a similar β2GPI biodistribution to naive mice but the immunized pregnant animals exhibited a significant increase in fetal loss associated with C3 and C9 deposition at the implantation sites. Treatment of mice with LPS after β2GPI-Cy5.5 injection promoted protein localization on gut and brain ECs associated with IgG, C1q, and C9 deposition in immunized mice. These findings indicate that β2GPI binding to EC requires priming with pro-inflammatory factors which is not needed for uterine and placental localization probably dependent on hormonal changes.

}, keywords = {Animals, beta 2-Glycoprotein I, Complement C1q, Complement C3, Complement C9, Endothelial Cells, Endothelium, Vascular, Female, Fetal Death, Humans, Mice, Mice, Inbred BALB C, Pregnancy, Trophoblasts, Uterus}, issn = {1528-0020}, doi = {10.1182/blood-2011-01-333617}, author = {Agostinis, Chiara and Biffi, Stefania and Garrovo, Chiara and Durigutto, Paolo and Lorenzon, Andrea and Bek, Alpan and Bulla, Roberta and Grossi, Claudia and Borghi, Maria O and Meroni, Pierluigi and Tedesco, Francesco} } @article {1626, title = {Anti transglutaminase antibodies cause ataxia in mice.}, journal = {PLoS One}, volume = {5}, year = {2010}, month = {2010}, pages = {e9698}, abstract = {

BACKGROUND: Celiac disease (CD) is an autoimmune gastrointestinal disorder characterized by the presence of anti-transglutaminase 2 (TG2) and anti-gliadin antibodies. Amongst the neurological dysfunctions associated with CD, ataxia represents the most common one.

METHODS: We analyzed by immunohistochemistry, the anti-neural reactivity of the serum from 20 CD patients. To determine the role of anti-TG2 antibodies in ataxia, two anti-TG2 single chain variable fragments (scFv), isolated from a phage-display IgA antibody library, were characterized by immunohistochemistry and ELISA, and injected in mice to study their effects on motor coordination. We found that 75\% of the CD patient population without evidence of neurological involvement, has circulating anti-neural IgA and/or IgG antibodies. Two anti-TG2 scFvs, cloned from one CD patient, stained blood vessels but only one reacted with neurons. This anti-TG2 antibody showed cross reactivity with the transglutaminase isozymes TG3 and TG6. Intraventricular injection of the anti-TG2 or the anti-TG2/3/6 cross-reactive scFv provoked transient, equally intensive ataxia in mice.

CONCLUSION: The serum from CD patients contains anti-TG2, TG3 and TG6 antibodies that may potentially cause ataxia.

}, keywords = {Adult, Animals, Antibodies, Ataxia, Autoimmune Diseases, Brain, Celiac Disease, Female, Gliadin, Humans, Isoenzymes, Male, Mice, Mice, Inbred C57BL, Middle Aged, Motor Skills, Rats, Rats, Sprague-Dawley, Transglutaminases}, issn = {1932-6203}, doi = {10.1371/journal.pone.0009698}, author = {Boscolo, Sabrina and Lorenzon, Andrea and Sblattero, Daniele and Florian, Fiorella and Stebel, Marco and Marzari, Roberto and Not, Tarcisio and Aeschlimann, Daniel and Ventura, Alessandro and Hadjivassiliou, Marios and Tongiorgi, Enrico} }