@article {10811, title = {Low-dose sirolimus in two cousins with autoimmune lymphoproliferative syndrome-associated infection.}, journal = {Pediatr Int}, volume = {60}, year = {2018}, month = {2018 Mar}, pages = {315-317}, keywords = {Anti-Bacterial Agents, Autoimmune Lymphoproliferative Syndrome, Child, Child, Preschool, Dose-Response Relationship, Drug, Female, Humans, Immunosuppressive Agents, Infant, Male, Otitis Media, Pneumonia, Bacterial, Sirolimus}, issn = {1442-200X}, doi = {10.1111/ped.13494}, author = {Nocerino, Agostino and Valencic, Erica and Loganes, Claudia and Pelos, Giorgio and Tommasini, Alberto} } @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 {10843, title = {Repositioning of Tak-475 In Mevalonate Kinase Disease: Translating Theory Into Practice.}, journal = {Curr Med Chem}, volume = {25}, year = {2018}, month = {2018}, pages = {2783-2796}, abstract = {

BACKGROUND: Mevalonate Kinase Deficiency (MKD, OMIM $\#$610377) is a rare autosomal recessive metabolic and inflammatory disease. In MKD, defective function of the enzyme mevalonate kinase, due to a mutation in the MVK gene, leads to the shortage of mevalonate- derived intermediates, which results in unbalanced prenylation of proteins and altered metabolism of sterols. These defects lead to a complex multisystem inflammatory and metabolic syndrome.

OBJECTIVE: Although biologic therapies aimed at blocking the inflammatory cytokine interleukin- 1 can significantly reduce inflammation, they cannot completely control the clinical symptoms that affect the nervous system. For this reason, MKD can still be considered an orphan drug disease. The availability of MKD models reproducing the MKD-systematic inflammation, is crucial to improve the knowledge on its pathogenesis, which is still unknown. New therapies are also required in order to improve pateints{\textquoteright} conditions and their quality of life.

METHODS: MKD-cellular models can be obtained by biochemical inhibition of mevalonatederived isoprenoids. Of note, these cells present an exaggerated response to inflammatory stimuli that can be reduced by treatment with zaragozic acid, an inhibitor of squalene synthase, thus increasing the availability of isoprenoids intermediates upstream the enzymatic block.

RESULTS: A similar action might be obtained by lapaquistat acetate (TAK-475, Takeda), a drug that underwent extensive clinical trials as a cholesterol lowering agent 10 years ago, with a good safety profile.

CONCLUSIONS: Here we describe the preclinical evidence supporting the possible repositioning of TAK-475 from its originally intended use to the treatment of MKD and discuss its potential to modulate the mevalonate pathway in inflammatory diseases.

}, keywords = {Acyl Coenzyme A, Cholesterol, Drug Repositioning, Farnesyl-Diphosphate Farnesyltransferase, Humans, Hypercholesterolemia, Mevalonate Kinase Deficiency, Oxazepines, Phosphotransferases (Alcohol Group Acceptor), Piperidines}, issn = {1875-533X}, doi = {10.2174/0929867324666170911161417}, author = {Marcuzzi, Annalisa and Loganes, Claudia and Celeghini, Claudio and Kleiner, Giulio} } @article {10518, title = {Curcumin Anti-Apoptotic Action in a Model of Intestinal Epithelial Inflammatory Damage.}, journal = {Nutrients}, volume = {9}, year = {2017}, month = {2017 Jun 06}, abstract = {

The purpose of this study is to determine if a preventive treatment with curcumin can protect intestinal epithelial cells from inflammatory damage induced by IFNγ. To achieve this goal we have used a human intestinal epithelial cell line (HT29) treated with IFNγ to undergo apoptotic changes that can reproduce the damage of intestinal epithelia exposed to inflammatory cytokines. In this model, we measured the effect of curcumin (curcuminoid from ) added as a pre-treatment at different time intervals before stimulation with IFNγ. Curcumin administration to HT29 culture before the inflammatory stimulus IFNγ reduced the cell apoptosis rate. This effect gradually declined with the reduction of the curcumin pre-incubation time. This anti-apoptotic action by curcumin pre-treatment was paralleled by a reduction of secreted IL7 in the HT29 culture media, while there was no relevant change in the other cytokine levels. Even though curcumin pre-administration did not impact the activation of the NF-κB pathway, a slight effect on the phosphorylation of proteins in this inflammatory signaling pathway was observed. In conclusion, curcumin pre-treatment can protect intestinal cells from inflammatory damage. These results can be the basis for studying the preventive role of curcumin in inflammatory bowel diseases.

}, keywords = {Anti-Inflammatory Agents, Non-Steroidal, Apoptosis, Cell Survival, Curcuma, Curcumin, Cytokines, Epithelial Cells, HT29 Cells, Humans, Inflammation, Interferon-gamma, Interleukin-7, Intestinal Mucosa, NF-kappa B, Phosphorylation, Signal Transduction}, issn = {2072-6643}, doi = {10.3390/nu9060578}, author = {Loganes, Claudia and Lega, Sara and Bramuzzo, Matteo and Vecchi Brumatti, Liza and Piscianz, Elisa and Valencic, Erica and Tommasini, Alberto and Marcuzzi, Annalisa} } @article {8355, title = {Action of methotrexate and tofacitinib on directly stimulated and bystander-activated lymphocytes.}, journal = {Mol Med Rep}, volume = {14}, year = {2016}, month = {2016 Jul}, pages = {574-82}, abstract = {

Chronic inflammation associated with autoimmune activation is characteristic of rheumatic diseases from childhood to adulthood. In recent decades, significant improvements in the treatment of these types of disease have been achieved using disease modifying anti-rheumatic drugs (DMARDs), such as methotrexate (MTX) and, more recently, using biologic inhibitors. The recent introduction of kinase inhibitors (for example, tofacitinib; Tofa) further increases the available ARDs. However, there are patients that do not respond to any treatment strategies, for whom combination therapies are proposed. The data regarding the combined action of different drugs is lacking and the knowledge of the mechanisms of ARDs and their actions upon pathogenic lymphocytes, which are hypothesized to sustain disease, is poor. An in~vitro model of inflammation was developed in the current study, in which stimulated and unstimulated lymphocytes were cultured together, but tracked separately, to investigate the action of MTX and Tofa on the two populations. By analysing lymphocyte proliferation and activation, and cytokine secretion in the culture supernatants, it was established that, due to the presence of activated cells, unstimulated cells underwent a bystander activation that was modulated by the ARDs. Additionally, varying administration schedules were demonstrated to affect lymphocytes differently in~vitro, either directly or via bystander activation. Furthermore, MTX and Tofa exerted different effects; while MTX showed an antiproliferative effect, Tofa marginally effected activation, although only a slight antiproliferative action, which could be potentiated by sequential treatment with MTX. Thus, it was hypothesized that these differences may be exploited in sequential therapeutic strategies, to maximize the anti-rheumatic effect. These findings are notable and must be accounted for, as bystander-activated cells in~vivo could contribute to the spread of autoimmune activation and disease progression.

}, issn = {1791-3004}, doi = {10.3892/mmr.2016.5263}, author = {Piscianz, Elisa and Candilera, Vanessa and Valencic, Erica and Loganes, Claudia and Paron, Greta and De Iudicibus, Sara and Decorti, Giuliana 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 {7787, title = {Altered germinal center reaction and abnormal B cell peripheral maturation in PI3KR1-mutated patients presenting with HIGM-like phenotype.}, journal = {Clin Immunol}, volume = {159}, year = {2015}, month = {2015 Jul}, pages = {33-6}, keywords = {B-Lymphocytes, Child, Preschool, Female, Germinal Center, Humans, Hyper-IgM Immunodeficiency Syndrome, Infant, Male, Mutation, Phenotype, Phosphatidylinositol 3-Kinases, RNA Splice Sites, Sequence Analysis, DNA}, issn = {1521-7035}, doi = {10.1016/j.clim.2015.04.014}, author = {Lougaris, Vassilios and Faletra, Flavio and Lanzi, Gaetana and Vozzi, Diego and Marcuzzi, Annalisa and Valencic, Erica and Piscianz, Elisa and Bianco, AnnaMonica and Girardelli, Martina and Baronio, Manuela and Loganes, Claudia and Fasth, Anders and Salvini, Filippo and Trizzino, Antonino and Moratto, Daniele and Facchetti, Fabio and Giliani, Silvia and Plebani, Alessandro and Tommasini, Alberto} } @article {8088, title = {The diagnostic challenge of very early-onset enterocolitis in an infant with XIAP deficiency.}, journal = {BMC Pediatr}, volume = {15}, year = {2015}, month = {2015}, pages = {208}, abstract = {

BACKGROUND: Aggressive course and resistance to treatments usually characterize very early onset inflammatory bowel disease (VEO-IBD). Some VEO-IBD cases are due to monogenic immune defects and can benefit from hematopoietic stem cell transplantation (HSCT).

CASE PRESENTATION: We describe a Caucasian male baby who presented in the first months of life macrophage activation syndrome, followed by intractable colitis, recurrent episodes of fever and mild splenomegaly. After several immunological, genetic and clinical investigations, subsequently a therapeutic attempt with colectomy, analysis of VEO-IBD-associated genes, revealed a causative mutation in XIAP. The genetic diagnosis of a primary immune deficiency allowed curing the boy with hematopoietic stem cell transplantation.

CONCLUSION: Our report, together with novel findings from recent literature, should contribute to increase awareness of monogenic immune defects as a cause of VEO-IBD. Comprehensive genetic analysis can allow a prompt diagnosis, resulting in the choice of effective treatments and sparing useless and damaging procedures.

}, issn = {1471-2431}, doi = {10.1186/s12887-015-0522-5}, author = {Girardelli, Martina and Arrigo, Serena and Barabino, Arrigo and Loganes, Claudia and Morreale, Giuseppe and Crovella, Sergio and Tommasini, Alberto and Bianco, Anna Monica} } @article {3485, title = {Inhibition of mesenchymal stromal cells by pre-activated lymphocytes and their culture media.}, journal = {Stem Cell Res Ther}, volume = {5}, year = {2014}, month = {2014}, pages = {3}, abstract = {

INTRODUCTION: Despite having a proven immunosuppressive potential in vitro, human mesenchymal stromal cells (MSCs) are reported to display variable efficacy in vivo and, in fact, their proven benefit in the clinical practice is still limited and controversial.

METHODS: The interplay between clinical grade MSCs and pre-activated donor lymphocytes or selected lymphocyte subsets was studied in vitro. The kinetics of MSC growth and viability was evaluated by adhesion-dependent changes of culture plate impedance and biochemically by a colorimetric assay. Activation of natural killer (NK) cells was assessed as well, using a flow cytometry assay.

RESULTS: A strong inhibition of MSC growth was rapidly induced by the addition of pre-activated lymphocytes but not of resting lymphocytes. Inhibition seems not to be attributable to a single cell population, as similar results can be obtained by depleting NK cells or by using either selected CD4+ or CD8+ lymphocytes. In addition, conditioned medium (CM) from activated lymphocytes was able to inhibit MSC growth in a dose-dependent manner. Furthermore, licensing with IFN-γ partially protected MSCs from pre-activated lymphocytes but not from their CM. These results suggest an inhibitory role of lymphocyte-activation-derived substances. However, the identification of a single molecule responsible for MSC inhibition remained elusive, even if preliminary experiments showed that ATP and, to a lesser extent, TNF-α might play a role.

CONCLUSIONS: These results suggest that survival of MSCs can be affected by soluble mediators released by activated lymphocytes. Thus it can be hypothesized that MSC immunosuppressive action in vivo could be impaired by ongoing immune activation through the release of inflammatory mediators.

}, keywords = {CD4-Positive T-Lymphocytes, CD8-Positive T-Lymphocytes, Cell Proliferation, Cell Survival, Cells, Cultured, Coculture Techniques, Culture Media, Conditioned, Cytokines, Humans, Killer Cells, Natural, Lymphocyte Activation, Mesenchymal Stromal Cells}, issn = {1757-6512}, doi = {10.1186/scrt392}, author = {Valencic, Erica and Loganes, Claudia and Cesana, Stefania and Piscianz, Elisa and Gaipa, Giuseppe and Biagi, Ettore and Tommasini, Alberto} } @article {3548, title = {Piccolipi{\`u}, a multicenter birth cohort in Italy: protocol of the study.}, journal = {BMC Pediatr}, volume = {14}, year = {2014}, month = {2014}, pages = {36}, abstract = {

BACKGROUND: The fetal and infant life are periods of rapid development, characterized by high susceptibility to exposures. Birth cohorts provide unique opportunities to study early-life exposures in association with child development and health, as well as, with longer follow-up, the early life origin of adult diseases. Piccolipi{\`u} is an Italian birth cohort recently set up to investigate the effects of environmental exposures, parental conditions and social factors acting during pre-natal and early post-natal life on infant and child health and development. We describe here its main characteristics.

METHODS/DESIGN: Piccolipi{\`u} is a prospective cohort of expected 3000 newborns, who will be recruiting in six maternity units of five Italian cities (Florence, Rome, Trieste, Turin and Viareggio) since October 2011. Mothers are contacted during pregnancy or at delivery and are offered to participate in the study. Upon acceptance, their newborns are recruited at birth and followed up until at least 18 years of age. At recruitment, the mothers donate a blood sample and complete a baseline questionnaire. Umbilical cord blood, pieces of umbilical cord and heel blood spots are also collected. Postnatal follow-up currently occurs at 6, 12, and 24 months of age using on-line or postal self administered questionnaire; further questionnaires and medical examinations are envisaged. Questionnaires collect information on several factors, including mother{\textquoteright}s and/or child{\textquoteright}s environmental exposures, anthropometric measures, reproductive factors, diet, supplements, medical history, cognitive development, mental health and socioeconomic factors. Health promotion materials are also offered to parents.

DISCUSSION: Piccolipi{\`u} will broaden our understanding of the contribution of early-life factors to infant and child health and development. Several hypotheses on the developmental origins of health can be tested or piloted using the data collected from the Piccolipi{\`u} cohort. By pooling these data with those collected by other existing birth cohorts it will be possible to validate previous findings and to study rare exposures and outcomes.

}, keywords = {Adolescent, Child, Child Development, Child Welfare, Child, Preschool, Cohort Studies, Environmental Exposure, Humans, Infant, Infant, Newborn, Italy, Prospective Studies, Socioeconomic Factors}, issn = {1471-2431}, doi = {10.1186/1471-2431-14-36}, author = {Farchi, Sara and Forastiere, Francesco and Vecchi Brumatti, Liza and Alviti, Sabrina and Arnofi, Antonio and Bernardini, Tommaso and Bin, Maura and Brescianini, Sonia and Colelli, Valentina and Cotichini, Rodolfo and Culasso, Martina and De Bartolo, Paolo and Felice, Laura and Fiano, Valentina and Fioritto, Alessandra and Frizzi, Alfio and Gagliardi, Luigi and Giorgi, Giulia and Grasso, Chiara and La Rosa, Francesca and Loganes, Claudia and Lorusso, Paola and Martini, Valentina and Merletti, Franco and Medda, Emanuela and Montelatici, Veronica and Mugelli, Isabella and Narduzzi, Silvia and Nistic{\`o}, Lorenza and Penna, Luana and Piscianz, Elisa and Piscicelli, Carlo and Poggesi, Giulia and Porta, Daniela and Ranieli, Antonella and Rapisardi, Gherardo and Rasulo, Assunta and Richiardi, Lorenzo and Rusconi, Franca and Serino, Laura and Stazi, Maria Antonietta and Toccaceli, Virgilia and Todros, Tullia and Tognin, Veronica and Trevisan, Morena and Valencic, Erica and Volpi, Patrizia and Ziroli, Valentina and Ronfani, Luca and Di Lallo, Domenico} } @article {3498, title = {Severe inflammatory bowel disease associated with congenital alteration of transforming growth factor beta signaling.}, journal = {J Crohns Colitis}, volume = {8}, year = {2014}, month = {2014 Aug}, pages = {770-4}, abstract = {

Transforming growth factor beta is a pleiotropic cytokine which plays a central role in the homeostasis of the immune system. A complex dysregulation of its signaling occurs in Loeys-Dietz syndrome, a monogenic disorder caused by mutations of transforming growth factor beta receptors type 1 or type 2, characterized by skeletal involvement, craniofacial abnormalities, and arterial tortuosity with a strong predisposition for aneurysm and dissection. In addition, several immunologic abnormalities have been described in these patients, including an increased risk of allergic disorders as well as eosinophilic gastrointestinal disorders. The occurrence of inflammatory bowel disorders has been also reported, but it is poorly documented. We describe two unrelated children with Loeys-Dietz syndrome affected by severe chronic inflammatory colitis appearing at an early age. The intestinal disease presented similar features in both patients, including a histopathological picture of non-eosinophilic chronic ulcerative colitis, striking elevation of inflammatory markers, and a distinctly severe clinical course leading to failure to thrive, with resistance to multiple immunosuppressive treatments. One of the patients also presented autoimmune thyroiditis. Our report confirms that chronic ulcerative colitis may be associated with Loeys-Dietz syndrome. This finding suggests that an alteration of transforming growth factor beta signaling may by itself predispose to inflammatory colitis in humans, and represent an invaluable model to understand inflammatory bowel diseases.

}, keywords = {Child, Preschool, Colon, Colonoscopy, Female, Humans, Infant, Inflammatory Bowel Diseases, Loeys-Dietz Syndrome, Male, Signal Transduction, Transforming Growth Factor beta}, issn = {1876-4479}, doi = {10.1016/j.crohns.2014.01.013}, author = {Naviglio, Samuele and Arrigo, Serena and Martelossi, Stefano and Villanacci, Vincenzo and Tommasini, Alberto and Loganes, Claudia and Fabretto, Antonella and Vignola, Silvia and Lonardi, Silvia and Ventura, Alessandro} }