@article {10761, title = {Causes of Treatment Failure in Children With Inflammatory Bowel Disease Treated With Infliximab: A Pharmacokinetic Study.}, journal = {J Pediatr Gastroenterol Nutr}, volume = {68}, year = {2019}, month = {2019 Jan}, pages = {37-44}, abstract = {

OBJECTIVES: Anti-tumor necrosis factor antibodies have led to a revolution in the treatment of inflammatory bowel diseases (IBD); however, a sizable proportion of patients does not respond to therapy. There is increasing evidence suggesting that treatment failure may be classified as mechanistic (pharmacodynamic), pharmacokinetic, or immune-mediated. Data regarding the contribution of these factors in children with IBD treated with infliximab (IFX) are still incomplete. The aim was to assess the causes of treatment failure in a prospective cohort of pediatric patients treated with IFX.

METHODS: This observational study considered 49 pediatric (median age 14.4) IBD patients (34 Crohn disease, 15 ulcerative colitis) treated with IFX. Serum samples were collected at 6, 14, 22 and 54 weeks, before IFX infusions. IFX and anti-infliximab antibodies (AIA) were measured using enzyme linked immunosorbent assays. Disease activity was determined by Pediatric Crohn{\textquoteright}s Disease Activity Index or Pediatric Ulcerative Colitis Activity Index.

RESULTS: Clinical remission, defined as a clinical score <10, was obtained by 76.3\% of patients at week 14 and by 73.9\% at week 54. Median trough IFX concentration was higher at all time points in patients achieving sustained clinical remission. IFX levels during maintenance correlated also with C-reactive protein, albumin, and fecal calprotectin. After multivariate analysis, IFX concentration at week 14 >3.11 μg/mL emerged as the strongest predictor of sustained clinical remission. AIA concentrations were correlated inversely with IFX concentrations and directly with adverse reactions.

CONCLUSIONS: Most cases of therapeutic failure were associated with low serum drug levels. IFX trough levels at the end of induction are associated with sustained long-term response.

}, issn = {1536-4801}, doi = {10.1097/MPG.0000000000002112}, author = {Naviglio, Samuele and Lacorte, Doriana and Lucaf{\`o}, Marianna and Cif{\`u}, Adriana and Favretto, Diego and Cuzzoni, Eva and Silvestri, Tania and Pozzi Mucelli, Martina and Radillo, Oriano and Decorti, Giuliana and Fabris, Martina and Bramuzzo, Matteo and Taddio, Andrea and Stocco, Gabriele and Alvisi, Patrizia and Ventura, Alessandro and Martelossi, Stefano} } @article {10552, title = {Combined use of AFM and soft X-ray microscopy to reveal fibres{\textquoteright} internalization in mesothelial cells.}, journal = {Analyst}, volume = {142}, year = {2017}, month = {2017 May 30}, pages = {1982-1992}, abstract = {

Nanotoxicology and nanomedicine investigations often require the probing of nano-objects such as fibres and particles in biological samples and cells, whilst internalization and intracellular destiny are the main issues for in vitro cellular studies. Various high resolution microscopy techniques are well suited for providing this highly sought-after information. However, sample preparation, nanomaterial composition and sectioning challenges make it often difficult to establish whether the fibres or particles have been internalized or they are simply overlaying or underlying the biological matter. In this paper we suggest a novel suitable combination of two different microscopic techniques to reveal in intact cells the uptake of asbestos fibres by mesothelial cells. After exposure to asbestos fibres and fixation, cells were first analysed under the AFM instrument and then imaged under the TwinMic soft X-ray microscope at Elettra Sincrotrone. The suggested approach combines standard soft X-ray microscopy imaging and AFM microscopy, with a common non-invasive sample preparation protocol which drastically reduces the experimental uncertainty and provides a quick and definitive answer to the nanoparticle cellular and tissue uptake.

}, keywords = {Asbestos, Cell Line, Epithelial Cells, Epithelium, Humans, Microscopy, Atomic Force, X-Rays}, issn = {1364-5528}, doi = {10.1039/c6an02661c}, author = {Gianoncelli, Alessandra and Kourousias, George and Cammisuli, Francesca and Cassese, Damiano and Rizzardi, Clara and Radillo, Oriano and Lazzarino, Marco and Pascolo, Lorella} } @article {3571, title = {Clinical significance of hyper-IgA in a paediatric laboratory series.}, journal = {Arch Dis Child}, volume = {99}, year = {2014}, month = {2014 Dec}, pages = {1114-6}, abstract = {

The causes of extremely elevated IgA, whether isolated or associated with an increase in other classes of immunoglobulin, are poorly defined in paediatrics. We reviewed the diagnostic significance of very high IgA levels (greater than 3 SD above the mean for age) in a cohort of patients referred to a tertiary care children{\textquoteright}s hospital. Hyper-IgA was found in 91 of 6364 subjects (1.4\%) and in 68 cases was not associated with an increased IgG and/or IgM level. Most subjects with hyper-IgA (73.5\%) had a severe immune defect, a chronic rheumatic disease or inflammatory bowel disease, while these conditions were very rare in a control group with normal IgA values (8\%). Although our results may in part reflect the experience of a tertiary care centre, we suggest that hyper-IgA in children should always arouse suspicion of a serious disease.

}, keywords = {Adolescent, Child, Child, Preschool, Female, Hospitals, Pediatric, Humans, Hypergammaglobulinemia, Immunoglobulin A, Infant, Italy, Male, Tertiary Care Centers}, issn = {1468-2044}, doi = {10.1136/archdischild-2014-306607}, author = {Copetti, Valentina and Pastore, Serena and De Pieri, Carlo and Radillo, Oriano and Taddio, Andrea and Ventura, Alessandro and Tommasini, Alberto} } @article {1800, title = {Circulating TRAIL shows a significant post-partum decline associated to stressful conditions.}, journal = {PLoS One}, volume = {6}, year = {2011}, month = {2011}, pages = {e27011}, abstract = {

BACKGROUND: Since circulating levels of TNF-related apoptosis inducing ligand (TRAIL) may be important in the physiopathology of pregnancy, we tested the hypothesis that TRAIL levels change at delivery in response to stressful conditions.

METHODS/PRINCIPAL FINDINGS: We conducted a longitudinal study in a cohort of 73 women examined at week 12, week 16, delivery and in the corresponding cord blood (CB). Serum TRAIL was assessed in relationship with maternal characteristics and to biochemical parameters. TRAIL did not vary between 12 (67.6{\textpm}27.6 pg/ml, means{\textpm}SD) and 16 (64.0{\textpm}16.2 pg/ml) weeks{\textquoteright} gestation, while displaying a significant decline after partum (49.3{\textpm}26.4 pg/ml). Using a cut-off decline >20 pg/ml between week 12 and delivery, the subset of women with the higher decline of circulating TRAIL (41.7\%) showed the following characteristics: i) nullipara, ii) higher age, iii) operational vaginal delivery or urgent CS, iv) did not receive analgesia during labor, v) induced labor. CB TRAIL was significantly higher (131.6{\textpm}52 pg/ml) with respect to the corresponding maternal TRAIL, and the variables significantly associated with the first quartile of CB TRAIL (<90 pg/ml) were higher pre-pregnancy BMI, induction of labor and fetal distress. With respect to the biochemical parameters, maternal TRAIL at delivery showed an inverse correlation with C-reactive protein (CRP), total cortisol, glycemia and insulin at bivariate analysis, but only with CRP at multivariate analysis.

CONCLUSIONS: Stressful partum conditions and elevated CRP levels are associated with a decrease of circulating TRAIL.

}, keywords = {Adult, Biological Markers, C-Reactive Protein, Female, Fetal Blood, Fetal Distress, Humans, Labor, Obstetric, Logistic Models, Multivariate Analysis, Postpartum Period, Pregnancy, Pregnancy Outcome, Statistics, Nonparametric, Stress, Physiological, TNF-Related Apoptosis-Inducing Ligand}, issn = {1932-6203}, doi = {10.1371/journal.pone.0027011}, author = {Zauli, Giorgio and Monasta, Lorenzo and Rimondi, Erika and Vecchi Brumatti, Liza and Radillo, Oriano and Ronfani, Luca and Montico, Marcella and D{\textquoteright}Ottavio, Giuseppina and Alberico, Salvatore and Secchiero, Paola} }