@article {8098, title = {The p53 transcriptional pathway is preserved in ATMmutated and NOTCH1mutated chronic lymphocytic leukemias.}, journal = {Oncotarget}, volume = {5}, year = {2014}, month = {2014 Dec 30}, pages = {12635-45}, abstract = {

By using next generation sequencing, we have analyzed 108 B chronic lymphocytic leukemia (B-CLL) patients. Among genes involved in the TP53 pathway, we found frequent mutations in ATM (n=18), TP53 (n=10) and NOTCH1 (n=10) genes, rare mutations of NOTCH2 (n=2) and CDKN1A/p21 (n=1) and no mutations in BAX, MDM2, TNFRSF10A and TNFRSF10B genes. The in vitro treatment of primary B-CLL cells with the activator of p53 Nutlin-3 induced the transcription of p53 target genes, without significant differences between the B-CLL without mutations and those harboring either ATM or NOTCH1mutations. On the other hand, the subgroup of TP53mutated B-CLL exhibited a significantly lower induction of the p53 target genes in response to Nutlin-3 as compared to the other B-CLL samples. However, among the TP53mutated B-CLL, those showing mutations in the high hot spot region of the DNA binding domain [273-280 aa] maintained a significantly higher p53-dependent transcriptional activity as compared to the other TP53mutated B-CLL samples. Since the ability to elicit a p53-dependent transcriptional activity in vitro has a positive prognostic significance, our data suggest that ATMmutated, NOTCH1mutated and surprisingly, also a subset of TP53mutated B-CLL patients might benefit from therapeutic combinations including small molecule activator of the p53 pathway.

}, keywords = {Aged, Aged, 80 and over, Ataxia Telangiectasia Mutated Proteins, Base Sequence, Female, Genes, p53, Humans, Leukemia, Lymphocytic, Chronic, B-Cell, Male, Models, Molecular, Molecular Sequence Data, Mutation, Receptor, Notch1, Signal Transduction, Tumor Suppressor Protein p53}, issn = {1949-2553}, doi = {10.18632/oncotarget.2211}, author = {Athanasakis, Emmanouil and Melloni, Elisabetta and Rigolin, Gian Matteo and Agnoletto, Chiara and Voltan, Rebecca and Vozzi, Diego and Piscianz, Elisa and Segat, Ludovica and dal Monego, Simeone and Cuneo, Antonio and Secchiero, Paola and Zauli, Giorgio} } @article {1957, title = {Patients affected by metabolic syndrome show decreased levels of circulating platelet derived growth factor (PDGF)-BB.}, journal = {Clin Nutr}, volume = {32}, year = {2013}, month = {2013 Apr}, pages = {259-64}, abstract = {

BACKGROUND \& AIMS: The development and/or progression of metabolic syndrome (MetS) in overweight and obese individuals have been associated to low-grade inflammation, but few studies have simultaneously analyzed the circulating levels of several cytokines.

METHODS: In this pilot study, a group of 27 cytokines and growth factors was analyzed in the serum of obese patients (n=40) diagnosed for MetS in comparison with sex- and age-matched control subjects without MetS (n=53) by using a multiplex immunoassay. Release of cytokines was measured in culture supernatants of human primary endothelial cells, THP-1 macrophagic cells and HuH-7 hepatoma cells upon exposure to a high fat mixture.

RESULTS: While the majority of cytokines did not show significant differences between the investigated groups, the circulating levels of CXCL10/IP-10 and IL-6 were higher in the MetS group versus overweight control group. In contrast, PDGF-BB serum levels were significantly decreased in MetS patients. The in~vitro addition of a high fat mixture increased the release of IL-6 and/or CXCL10/IP-10 in the culture supernatant of human primary endothelial cells and THP-1 macrophagic cells, while the same mixture significantly decreased the release of PDGF-BB by human THP-1 macrophagic and HuH-7 hepatoma cells.

CONCLUSIONS: The current demonstration that MetS is associated with decrease of the pro-fibrotic PDGF cytokine is a completely novel finding, which adds complexity to the interplay between inflammation and fibrosis in patients affected by MetS.

}, keywords = {Adolescent, Adult, Aged, Case-Control Studies, Cell Line, Tumor, Chemokine CXCL10, Endothelial Cells, Female, Humans, Interleukin-6, Linear Models, Male, Metabolic Syndrome X, Middle Aged, Obesity, Pilot Projects, Proto-Oncogene Proteins c-sis, RNA, Messenger, Young Adult}, issn = {1532-1983}, doi = {10.1016/j.clnu.2012.07.003}, author = {Tisato, Veronica and Toffoli, Barbara and Monasta, Lorenzo and Bernardi, Stella and Candido, Riccardo and Zauli, Giorgio and Secchiero, Paola} } @article {1667, title = {Pegylated TRAIL retains anti-leukemic cytotoxicity and exhibits improved signal transduction activity with respect to TRAIL.}, journal = {Invest New Drugs}, volume = {30}, year = {2012}, month = {2012 Apr}, pages = {828-32}, abstract = {

To improve the pharmacokinetic profile of tumor necrosis factor-related apoptosis inducing ligand (TRAIL) an N-terminal specific pegylation was performed to generate pegylated TRAIL (PEG-TRAIL). In in vitro experiments, we found that although PEG-TRAIL was slightly less efficient than recombinant TRAIL in promoting leukemic cell apoptosis, it showed an improved ability to promote migration of bone-marrow mesenchymal stem cells and to elicit the ERK1/2 intracellular signal transduction pathway. Overall, these data suggest that TRAIL pegylation retains, or even enhances, the biological activities of TRAIL relevant for its therapeutic applications.

}, keywords = {Antineoplastic Agents, Apoptosis, Caspase 3, Cell Movement, Dose-Response Relationship, Drug, HL-60 Cells, Humans, Leukemia, Mesenchymal Stromal Cells, Mitogen-Activated Protein Kinase 1, Mitogen-Activated Protein Kinase 3, Phosphorylation, Polyethylene Glycols, Recombinant Fusion Proteins, Signal Transduction, Time Factors, TNF-Related Apoptosis-Inducing Ligand}, issn = {1573-0646}, doi = {10.1007/s10637-010-9599-8}, author = {Gonelli, Arianna and Radillo, Oriano and Drioli, Sara and Rimondi, Erika and Secchiero, Paola and Maria Bonora, Gian} } @article {1932, title = {Potential role of TRAIL in the management of autoimmune diabetes mellitus.}, journal = {Curr Pharm Des}, volume = {18}, year = {2012}, month = {2012}, pages = {5759-65}, abstract = {

Type 1 diabetes mellitus (T1DM) is an autoimmune disease, due to the immune-mediated destruction of pancreatic β-cells, whose incidence has been steadily increasing during the last decades. Insulin replacement therapy can treat T1DM, which, however, is still associated with substantial morbidity and mortality. For this reason, great effort is being put into developing strategies that could eventually prevent and/or cure this disease. These strategies are mainly focused on blocking the immune system from attacking β-cells together with functional islet restoration either by regeneration or transplantation. Recent experimental evidences suggest that TNFrelated apoptosis-inducing ligand (TRAIL), which is an immune system modulator protein, could represent an interesting candidate for the cure for T1DM and/or its complications. Here we review the evidences on the potential role of TRAIL in the management of T1DM.

}, keywords = {Animals, Autoimmunity, Diabetes Mellitus, Type 1, Humans, Hypoglycemic Agents, Insulin, Insulin-Secreting Cells, Islets of Langerhans, TNF-Related Apoptosis-Inducing Ligand}, issn = {1873-4286}, author = {Bernardi, Stella and Norcio, Alessia and Toffoli, Barbara and Zauli, Giorgio and Secchiero, Paola} }