@article {10591, title = {Complement Protein C1q Binds to Hyaluronic Acid in the Malignant Pleural Mesothelioma Microenvironment and Promotes Tumor Growth.}, journal = {Front Immunol}, volume = {8}, year = {2017}, month = {2017}, pages = {1559}, abstract = {

C1q is the first recognition subcomponent of the complement classical pathway, which acts toward the clearance of pathogens and apoptotic cells. C1q is also known to modulate a range of functions of immune and non-immune cells, and has been shown to be involved in placental development and sensorial synaptic pruning. We have recently shown that C1q can promote tumor by encouraging their adhesion, migration, and proliferation in addition to angiogenesis and metastasis. In this study, we have examined the role of human C1q in the microenvironment of malignant pleural mesothelioma (MPM), a rare form of cancer commonly associated with exposure to asbestos. We found that C1q was highly expressed in all MPM histotypes, particularly in epithelioid rather than in sarcomatoid histotype. C1q avidly bound high and low molecular weight hyaluronic acid (HA) its globular domain. C1q bound to HA was able to induce adhesion and proliferation of mesothelioma cells (MES) enhancement of ERK1/2, SAPK/JNK, and p38 phosphorylation; however, it did not activate the complement cascade. Consistent with the modular organization of the globular domain, we demonstrated that C1q may bind to HA through ghA module, whereas it may interact with human MES through the ghC. In conclusion, C1q highly expressed in MPM binds to HA and enhances the tumor growth promoting cell adhesion and proliferation. These data can help develop novel diagnostic markers and molecular targets for MPM.

}, issn = {1664-3224}, doi = {10.3389/fimmu.2017.01559}, author = {Agostinis, Chiara and Vidergar, Romana and Belmonte, Beatrice and Mangogna, Alessandro and Amadio, Leonardo and Geri, Pietro and Borelli, Violetta and Zanconati, Fabrizio and Tedesco, Francesco and Confalonieri, Marco and Tripodo, Claudio and Kishore, Uday and Bulla, Roberta} } @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 {8300, title = {Iron signature in asbestos-induced malignant pleural mesothelioma: A population-based autopsy study.}, journal = {J Toxicol Environ Health A}, volume = {79}, year = {2016}, month = {2016}, pages = {129-41}, abstract = {

Malignant pleural mesothelioma (MPM) is an aggressive cancer with poor prognosis. The development of MPM is frequently linked to inhalation of asbestos fibers. A genetic component of susceptibility to this disease is suggested by the observation that some individuals develop MPM following lower doses of asbestos exposure, whereas others exposed to higher quantities do not seem to be affected. This hypothesis is supported also by frequent reports of MPM familial clustering. Despite the widely recognized role of iron (Fe) in cellular asbestos-induced pulmonary toxicity, the role of the related gene polymorphisms in the etiology of MPM has apparently not been evaluated. Eighty-six single-nucleotide polymorphisms (SNPs) of 10 Fe-metabolism genes were examined by exploiting formalin-fixed paraffin-embedded postmortem samples from 77 patients who died due to MPM (designated AEM) and compared with 48 who were exposed to asbestos but from died in old age of cause other than asbestos (designated AENM). All subjects showed objective signs of asbestos exposure. Three SNPs, localized in the ferritin heavy polypeptide, transferrin, and hephaestin genes, whose frequencies were distributed differently in AEM and AENM populations, were identified. For ferritin and transferrin the C/C and the G/G genotypes, respectively, representing intronic polymorphisms, were significantly associated with protection against MPM and need to be considered as possible genetic markers of protection. Similarly, the C/C hephaestin SNP, a missense variation of this multicopper ferroxidase encoding gene, may be related, also functionally, with protection against MPM. In conclusion, it is proposed that three Fe metabolism-associated genes, significantly associated with protection against development of MPM, may serve as protective markers for this aggressive tumor.

}, keywords = {Adult, Aged, Asbestos, Autopsy, Case-Control Studies, Female, Ferritins, Gene Frequency, Genetic Markers, Humans, Iron, Lung Neoplasms, Male, Membrane Proteins, Mesothelioma, Middle Aged, Mutation, Missense, Polymorphism, Single Nucleotide, Transferrin, Young Adult}, issn = {1528-7394}, doi = {10.1080/15287394.2015.1123452}, author = {Crovella, Sergio and Bianco, Anna Monica and Vuch, Joseph and Zupin, Luisa and Moura, Ronald Rodrigues and Trevisan, Elisa and Schneider, Manuela and Brollo, Alessandro and Nicastro, Enza Maria and Cosenzi, Alessandro and Zabucchi, Giuliano and Borelli, Violetta} } @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 {7732, title = {NLRP1 and NLRP3 polymorphisms in mesothelioma patients and asbestos exposed individuals a population-based autopsy study from North East Italy.}, journal = {Infect Agent Cancer}, volume = {10}, year = {2015}, month = {2015}, pages = {26}, abstract = {

NRLP1 (rs12150220, rs9889625, rs9900356, rs6502867, rs2670660) and NLRP3 (rs35829419, rs10754558) polymorphisms have been analyzed in 69 subjects with documented asbestos exposure and death for malignant pleural mesothelioma and 59 patients with documented asbestos exposure but death for other causes, all from a North East Italy. No association was found between NLRP1 and NLRP3 polymorphisms and susceptibility to develop mesothelioma using the general, dominant or recessive models. Also haplotype analysis did not reveal any significant association with mesothelioma. Our findings, being controversial with respect to another study on Italian patients, do suggest the need of further studies to unravel the contribution of NLRP1 and NLRP3 in susceptibility to mesothelioma.

}, issn = {1750-9378}, doi = {10.1186/s13027-015-0022-0}, author = {Borelli, Violetta and Moura, Ronal R and Trevisan, Elisa and Crovella, Sergio} } @article {1936, title = {Peroxidase-like activity of ferruginous bodies isolated by exploiting their magnetic property.}, journal = {J Toxicol Environ Health A}, volume = {75}, year = {2012}, month = {2012}, pages = {603-23}, abstract = {

Ferruginous bodies (FB) are polymorphic structures whose formation is macrophage dependent, and are composed of a core, which may consist of an asbestos fiber coated with proteins, among which ferritin is the main component. Within ferritin, the ferric and ferrous ions are coordinated as ferrihydrite, which is the main iron (Fe) storage compound. However, when ferritin accumulates in some tissues following Fe overload it also contains magnetite along with ferrihydrite, which endows it with magnetic properties. Recently studies showed that magnetite exerts peroxidase-like activity, and since ferruginous bodies display magnetic properties, it was postulated that these particular structures may also contain magnetite within the ferritin coating, and thus may also exert peroxidase-like activity. Histochemical analysis for peroxidase of isolated FB smears demonstrated positive staining. Samples isolated from 4 different autopsy lung fragments were also able to oxidize 3,3{\textquoteright},5,5{\textquoteright}-tetramethyl-benzidine to a blue colored compound that absorbs at 655 nm. This activity was (1) azide and heat insensitive with optimal pH from 5 to 6, and (2) highly variable, changing more than 25-fold from one sample to another. These findings, together with evidence that the peroxidase-like activity of ferruginous bodies has a hydrogen peroxide and substrate requirement different from that of human myeloperoxidase, can exclude that this enzyme gives a significant contribution to the formation of FB. Standard Fe-rich asbestos fibers also express a peroxidase-like activity, but this appears negligible compared to that of ferruginous bodies. Strong acidification of standard Fe-containing asbestos fibers or magnetically isolated ferruginous bodies liberates a high amount of peroxidase-like activity, which is probably accounted for by the release of Fe ions. Further, FB also damage mesothelial cells in vitro. Data suggest that FB exert peroxidase-like activity and cytotoxic activity against mesothelial cells, and hence may be an important factor in pathogenesis of asbestos-related diseases.

}, keywords = {Air Pollutants, Occupational, Asbestos, Asbestosis, Benzidines, Catalysis, Cell Line, Chromogenic Compounds, Cytotoxins, Ferric Compounds, Ferritins, Ferrosoferric Oxide, Humans, Hydrogen-Ion Concentration, Lung, Magnetic Phenomena, Mesothelioma, Mineral Fibers, Oxidation-Reduction, Peroxidases, Respiratory Mucosa}, issn = {1528-7394}, doi = {10.1080/15287394.2012.688478}, author = {Borelli, Violetta and Trevisan, Elisa and Vita, Francesca and Bottin, Cristina and Melato, Mauro and Rizzardi, Clara and Zabucchi, Giuliano} }