@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 {10440, title = {Neuronal Dysfunction Associated with Cholesterol Deregulation.}, journal = {Int J Mol Sci}, volume = {19}, year = {2018}, month = {2018 May 19}, abstract = {

Cholesterol metabolism is crucial for cells and, in particular, its biosynthesis in the central nervous system occurs in situ, and its deregulation involves morphological changes that cause functional variations and trigger programmed cell death. The pathogenesis of rare diseases, such as Mevalonate Kinase Deficiency or Smith$^{-}$Lemli$^{-}$Opitz Syndrome, arises due to enzymatic defects in the cholesterol metabolic pathways, resulting in a shortage of downstream products. The most severe clinical manifestations of these diseases appear as neurological defects. Expanding the knowledge of this biological mechanism will be useful for identifying potential targets and preventing neuronal damage. Several studies have demonstrated that deregulation of the cholesterol pathway induces mitochondrial dysfunction as the result of respiratory chain damage. We set out to determine whether mitochondrial damage may be prevented by using protective mitochondria-targeted compounds, such as MitoQ, in a neuronal cell line treated with a statin to induce a biochemical block of the cholesterol pathway. Evidence from the literature suggests that mitochondria play a crucial role in the apoptotic mechanism secondary to blocking the cholesterol pathway. Our study shows that MitoQ, administered as a preventive agent, could counteract the cell damage induced by statins in the early stages, but its protective role fades over time.

}, keywords = {Anticholesteremic Agents, Cell Line, Tumor, Cholesterol, Electron Transport, Humans, Lovastatin, Mitochondria, Neurons, Neuroprotective Agents, Organophosphorus Compounds, Ubiquinone}, issn = {1422-0067}, doi = {10.3390/ijms19051523}, author = {Marcuzzi, Annalisa and Loganes, Claudia and Valencic, Erica and Piscianz, Elisa and Monasta, Lorenzo and Bilel, Sabrine and Bortul, Roberta and Celeghini, Claudio and Zweyer, Marina and Tommasini, Alberto} } @article {8323, title = {Geranylgeraniol and Neurological Impairment: Involvement of Apoptosis and Mitochondrial Morphology.}, journal = {Int J Mol Sci}, volume = {17}, year = {2016}, month = {2016}, pages = {365}, abstract = {

Deregulation of the cholesterol pathway is an anomaly observed in human diseases, many of which have in common neurological involvement and unknown pathogenesis. In this study we have used Mevalonate Kinase Deficiency (MKD) as a disease-model in order to investigate the link between the deregulation of the mevalonate pathway and the consequent neurodegeneration. The blocking of the mevalonate pathway in a neuronal cell line (Daoy), using statins or mevalonate, induced an increase in the expression of the inflammasome gene (NLRP3) and programmed cell death related to mitochondrial dysfunction. The morphology of the mitochondria changed, clearly showing the damage induced by oxidative stress and the decreased membrane potential associated with the alterations of the mitochondrial function. The co-administration of geranylgeraniol (GGOH) reduced the inflammatory marker and the damage of the mitochondria, maintaining its shape and components. Our data allow us to speculate about the mechanism by which isoprenoids are able to rescue the inflammatory marker in neuronal cells, independently from the block of the mevalonate pathway, and about the fact that cell death is mitochondria-related.

}, issn = {1422-0067}, doi = {10.3390/ijms17030365}, author = {Marcuzzi, Annalisa and Piscianz, Elisa and Zweyer, Marina and Bortul, Roberta and Loganes, Claudia and Girardelli, Martina and Baj, Gabriele and Monasta, Lorenzo and Celeghini, Claudio} } @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 {7754, title = {Two-dimensional gel electrophoresis analysis of the leiomyoma interstitial fluid reveals altered protein expression with a possible involvement in pathogenesis.}, journal = {Oncol Rep}, volume = {33}, year = {2015}, month = {2015 May}, pages = {2219-26}, abstract = {

Uterine leiomyoma is the most common smooth benign neoplasm. In the present study, we analyzed the global interstitial fluid (IF) profile of leiomyoma vs. normal myometrium to identify protein dysregulation involved in leiomyoma pathogenesis. Two-dimensional gel electrophoresis and mass spectrometry were used to generate and compare the global interstitial fluid profiles of the leiomyoma and of the normal tissue. Two proteins were validated by immunohistochemistry. By comparing the interstitial fluid profile of the leiomyoma with that of the normal myometrium, the levels of seven proteins were found to be significantly different: four structural organization proteins (desmin, prelamin-A/C, transgelin and α-actinin-1), an inflammatory response (α1-antitrypsin), a response to oxidative stress (peroxiredoxin-2), and a folding protein (heat shock 70 kDa protein 1A/1B). Desmin, α1-antitrypsin and peroxiredoxin-2 were upregulated in the leiomyoma, whereas heat shock 70 kDa protein 1A/1B, α-actinin-1, prelamin-A/C and transgelin were downregulated. Desmin and α1-antitrypsin were further validated by immunohistochemistry. By identifying proteins with altered expression levels compared to the myometrium from several pathways of the leiomyoma pathogenesis, we found the leiomyoma interstitial fluid to have a characteristic proteomic profile. A better appreciation of the pathophysiology of the disease can be useful in the development of conservative treatments that serve as viable alternatives to hysterectomy.

}, issn = {1791-2431}, doi = {10.3892/or.2015.3827}, author = {Ura, Blendi and Scrimin, Federica and Zanconati, Fabrizio and Arrigoni, Giorgio and Monasta, Lorenzo and Romano, Andrea and Banco, Rubina and Zweyer, Marina and Milani, Daniela and Ricci, Giuseppe} } @article {8053, title = {Ultrastructural Morphology of Sperm from Human Globozoospermia.}, journal = {Biomed Res Int}, volume = {2015}, year = {2015}, month = {2015}, pages = {798754}, abstract = {

Globozoospermia is a rare disorder characterized by the presence of sperm with round head, lacking acrosome. Coiling tail around the nucleus has been reported since early human studies, but no specific significance has conferred it. By contrast, studies on animal models suggest that coiling tail around the nucleus could represent a crucial step of defective spermatogenesis, resulting in round-headed sperm. No observations, so far, support the transfer of this hypothesis to human globozoospermia. The purpose of this work was to compare ultrastructural morphology of human and mouse model globozoospermic sperm. Sperm have been investigated by using scanning and transmission electron microscopy. The images that we obtained show significant similarities to those described in GOPC knockout mice, an animal model of globozoospermia. By using this model as reference, we were able to identify the probable steps of the tail coiling process in human globozoospermia. Although we have no evidence that there is the same pathophysiology in man and knocked-out mouse, the similarities between these ultrastructural observations in human and those in the experimental model are very suggestive. This is the first demonstration of the existence of relevant morphological homologies between the tail coiling in animal model and human globozoospermia.

}, issn = {2314-6141}, doi = {10.1155/2015/798754}, author = {Ricci, Giuseppe and Andolfi, Laura and Zabucchi, Giuliano and Luppi, Stefania and Boscolo, Rita and Martinelli, Monica and Zweyer, Marina and Trevisan, Elisa} } @article {3570, title = {Potential role of circulating microRNAs as early markers of preeclampsia.}, journal = {Taiwan J Obstet Gynecol}, volume = {53}, year = {2014}, month = {2014 Jun}, pages = {232-4}, abstract = {

OBJECTIVE: To identify microRNAs (miRNAs) differentially expressed at early stages of gestation (12-14 weeks) in the serum of pregnant women, who later developed severe preeclampsia (sPE) in the third trimester of pregnancy (n~=~24) compared to women with normal pregnancy (n~=~24).

MATERIALS AND METHODS: Sera from 12-14-week-gestation whole blood were subjected to microarray analysis with TaqMan Low Density Array chips (human microRNA panel V3.0), and to quantitative real-time polymerase chain reaction.

RESULTS: By using the TaqMan Low Density Array chip technology, 19 mature miRNAs appeared differentially expressed in the group of women who later developed sPE as compared to normal women. The expression of four miRNAs (miR-1233, miR-520, miR-210, miR-144) was validated by quantitative real-time polymerase chain reaction analysis. MiR-1233 was the most overexpressed in the serum of women who later developed sPE.

CONCLUSION: Circulating miRNAs deserve further investigation in order to explore their potential role in the pathogenesis of preeclampsia. In particular, miR-1233 might represent a potential marker of early sPE.

}, keywords = {Adult, Biomarkers, Female, Gestational Age, Humans, MicroRNAs, Oligonucleotide Array Sequence Analysis, Pilot Projects, Pre-Eclampsia, Pregnancy, Retrospective Studies}, issn = {1875-6263}, doi = {10.1016/j.tjog.2014.03.001}, author = {Ura, Blendi and Feriotto, Giordana and Monasta, Lorenzo and Bilel, Sabrine and Zweyer, Marina and Celeghini, Claudio} }