@article {10849, title = {The Complex Interplay between Lipids, Immune System and Interleukins in Cardio-Metabolic Diseases.}, journal = {Int J Mol Sci}, volume = {19}, year = {2018}, month = {2018 Dec 14}, abstract = {

Lipids and inflammation regulate each other. Early studies on this topic focused on the systemic effects that the acute inflammatory response-and interleukins-had on lipid metabolism. Today, in the era of the obesity epidemic, whose primary complications are cardio-metabolic diseases, attention has moved to the effects that the nutritional environment and lipid derangements have on peripheral tissues, where lipotoxicity leads to organ damage through an imbalance of chronic inflammatory responses. After an overview of the effects that acute inflammation has on the systemic lipid metabolism, this review will describe the lipid-induced immune responses that take place in peripheral tissues and lead to chronic cardio-metabolic diseases. Moreover, the anti-inflammatory effects of lipid lowering drugs, as well as the possibility of using anti-inflammatory agents against cardio-metabolic diseases, will be discussed.

}, keywords = {Anti-Inflammatory Agents, Cardiovascular Diseases, Humans, Hypolipidemic Agents, Immune System, Inflammation, Interleukins, Lipid Metabolism, Lipids, Metabolic Diseases}, issn = {1422-0067}, doi = {10.3390/ijms19124058}, author = {Bernardi, Stella and Marcuzzi, Annalisa and Piscianz, Elisa and Tommasini, Alberto and Fabris, Bruno} } @article {10527, title = {Association between thyroid hormones and TRAIL.}, journal = {Clin Biochem}, volume = {50}, year = {2017}, month = {2017 Nov}, pages = {972-976}, abstract = {

INTRODUCTION: Recent studies suggest that a circulating protein called TRAIL (TNF-related apoptosis-inducing ligand) might have a role in the regulation of body weight and metabolism. Interestingly, thyroid hormones seem to increase TRAIL tissue expression. This study aimed at evaluating whether overt thyroid disorders affected circulating TRAIL levels.

METHODS: TRAIL circulating levels were measured in euthyroid, hyperthyroid, and hypothyroid patients before and after thyroid function normalization. Univariate and multivariate analyses were performed to evaluate the correlation between thyroid hormones and TRAIL. Then, the stimulatory effect of both triiodothyronine (T3) and thyroxine (T4) on TRAIL was evaluated in vitro on peripheral blood mononuclear cells.

RESULTS: Circulating levels of TRAIL significantly increased in hyperthyroid and decreased in hypothyroid patients as compared to controls. Once thyroid function was restored, TRAIL levels normalized. There was an independent association between TRAIL and both fT3 and fT4. Consistent with these findings, T3 and T4 stimulated TRAIL release in vitro.

CONCLUSION: Here we show that thyroid hormones are associated with TRAIL expression in vivo and stimulate TRAIL expression in vitro. Given the overlap between the metabolic effects of thyroid hormones and TRAIL, this work sheds light on the possibility that TRAIL might be one of the molecules mediating thyroid hormones peripheral effects.

}, keywords = {Aged, Female, Gene Expression Regulation, Humans, Hyperthyroidism, Hypothyroidism, Leukocytes, Mononuclear, Male, Middle Aged, Thyroxine, TNF-Related Apoptosis-Inducing Ligand, Triiodothyronine}, issn = {1873-2933}, doi = {10.1016/j.clinbiochem.2017.05.011}, author = {Bernardi, Stella and Bossi, Fleur and Toffoli, Barbara and Giudici, Fabiola and Bramante, Alessandra and Furlanis, Giulia and Stenner, Elisabetta and Secchiero, Paola and Zauli, Giorgio and Carretta, Renzo and Fabris, Bruno} } @article {10482, title = {Circulating osteoprotegerin is associated with chronic kidney disease in hypertensive patients.}, journal = {BMC Nephrol}, volume = {18}, year = {2017}, month = {2017 Jul 06}, pages = {219}, abstract = {

BACKGROUND: Osteoprotegerin (OPG) is a glycoprotein that plays an important regulatory role in the skeletal, vascular, and immune system. It has been shown that OPG predicts chronic kidney disease (CKD) in diabetic patients. We hypothesized that OPG could be a risk marker of CKD development also in non-diabetic hypertensive patients.

METHODS: A case-control study was carried out to measure circulating OPG levels in 42 hypertensive patients with CKD and in 141 hypertensive patients without CKD. A potential relationship between OPG and the presence of CKD was investigated and a receiver-operating characteristic (ROC) curve was designed thereafter to identify a cut-off value of OPG that best explained the presence of CKD. Secondly, to evaluate whether OPG increase could affect the kidney, 18 C57BL/6J mice were randomized to be treated with saline or recombinant OPG every 3~weeks for 12~weeks.

RESULTS: Circulating OPG levels were significantly higher in hypertensive patients with CKD, and there was a significant inverse association between OPG and renal function, that was independent from other variables. ROC analysis showed that OPG levels had a high statistically predictive value on CKD in hypertensive patients, which was greater than that of hypertension. The OPG best cut-off value associated with CKD was 1109.19~ng/L. In the experimental study, OPG delivery significantly increased the gene expression of pro-inflammatory and pro-fibrotic mediators, as well as the glomerular nitrosylation of proteins.

CONCLUSIONS: This study shows that OPG is associated with CKD in hypertensive patients, where it might have a higher predictive value than that of hypertension for CKD development. Secondly, we found that OPG delivery significantly increased the expression of molecular pathways involved in kidney damage. Further longitudinal studies are needed not only to evaluate whether OPG predicts CKD development but also to clarify whether OPG should be considered a risk factor for CKD.

}, keywords = {Aged, Animals, Biomarkers, Case-Control Studies, Female, Follow-Up Studies, Humans, Hypertension, Male, Mice, Mice, Inbred C57BL, Middle Aged, Osteoprotegerin, Random Allocation, Renal Insufficiency, Chronic}, issn = {1471-2369}, doi = {10.1186/s12882-017-0625-3}, author = {Bernardi, Stella and Toffoli, Barbara and Bossi, Fleur and Candido, Riccardo and Stenner, Elisabetta and Carretta, Renzo and Barbone, Fabio and Fabris, Bruno} } @article {7730, title = {TRAIL modulates the immune system and protects against the development of diabetes.}, journal = {J Immunol Res}, volume = {2015}, year = {2015}, month = {2015}, pages = {680749}, abstract = {

TRAIL or tumor necrosis factor (TNF) related apoptosis-inducing ligand is a member of the TNF superfamily of proteins, whose best characterized function is the induction of apoptosis in tumor, infected, or transformed cells through activation of specific receptors. In nontransformed cells, however, the actions of TRAIL are less well characterized. Recent studies suggest that TRAIL may be implicated in the development and progression of diabetes. Here we review TRAIL biological actions, its effects on the immune system, and how and to what extent it has been shown to protect against diabetes.

}, keywords = {Animals, Diabetes Mellitus, Humans, Immune System, Receptors, TNF-Related Apoptosis-Inducing Ligand, Signal Transduction}, issn = {2314-7156}, doi = {10.1155/2015/680749}, author = {Bossi, Fleur and Bernardi, Stella and Zauli, Giorgio and Secchiero, Paola and Fabris, Bruno} } @article {3579, title = {Osteoprotegerin increases in metabolic syndrome and promotes adipose tissue proinflammatory changes.}, journal = {Mol Cell Endocrinol}, volume = {394}, year = {2014}, month = {2014 Aug 25}, pages = {13-20}, abstract = {

BACKGROUND: Inflammation is believed to link obesity to insulin resistance, as in the setting of metabolic syndrome (MetS). Osteoprotegerin (OPG) is a soluble protein that seems to exert proatherogenic and prodiabetogenic effects. This study aims at determining OPG levels in MetS and whether OPG might contribute to MetS development and progression.

METHODOLOGY/PRINCIPAL FINDINGS: Circulating OPG was measured in 46 patients with MetS and 63 controls, and was found significantly elevated in those with MetS. In addition, circulating and tissue OPG was significantly increased in high-fat diet (HFD) fed C57BL6 mice, which is one of the animal models for the study of MetS. To evaluate the consequences of OPG elevation, we delivered this protein to C57BL6 mice, finding that it promoted systemic and adipose tissue proinflammatory changes in association with metabolic abnormalities.

CONCLUSIONS/SIGNIFICANCE: These data suggest that OPG may trigger adipose tissue proinflammatory changes in MetS/HFD-induced obesity.

}, keywords = {Adipose Tissue, Adult, Animals, Blood Glucose, Body Mass Index, C-Reactive Protein, Case-Control Studies, Cholesterol, HDL, Cholesterol, LDL, Diet, High-Fat, Female, Humans, Inflammation, Insulin, Insulin Resistance, Male, Metabolic Syndrome X, Mice, Mice, Inbred C57BL, Middle Aged, Obesity, Osteoprotegerin, Triglycerides}, issn = {1872-8057}, doi = {10.1016/j.mce.2014.06.004}, author = {Bernardi, Stella and Fabris, Bruno and Thomas, Merlin and Toffoli, Barbara and Tikellis, Christos and Candido, Riccardo and Catena, Cristiana and Mulatero, Paolo and Barbone, Fabio and Radillo, Oriano and Zauli, Giorgio and Secchiero, Paola} } @article {1911, title = {TNF-related apoptosis-inducing ligand significantly attenuates metabolic abnormalities in high-fat-fed mice reducing adiposity and systemic inflammation.}, journal = {Clin Sci (Lond)}, volume = {123}, year = {2012}, month = {2012 Nov}, pages = {547-55}, abstract = {

TRAIL [TNF (tumour necrosis factor)-related apoptosis-inducing ligand] has recently been shown to ameliorate the natural history of DM (diabetes mellitus). It has not been determined yet whether systemic TRAIL delivery would prevent the metabolic abnormalities due to an HFD [HF (high-fat) diet]. For this purpose, 27 male C57bl6 mice aged 8 weeks were randomly fed on a standard diet, HFD or HFD+TRAIL for 12 weeks. TRAIL was delivered weekly by intraperitoneal injection. Body composition was evaluated; indirect calorimetry studies, GTT (glucose tolerance test) and ITT (insulin tolerance test) were performed. Pro-inflammatory cytokines, together with adipose tissue gene expression and apoptosis, were measured. TRAIL treatment reduced significantly the increased adiposity associated with an HFD. Moreover, it reduced significantly hyperglycaemia and hyperinsulinaemia during a GTT and it improved significantly the peripheral response to insulin. TRAIL reversed the changes in substrate utilization induced by the HFD and ameliorated skeletal muscle non-esterified fatty acids oxidation rate. This was associated with a significant reduction of pro-inflammatory cytokines together with a modulation of adipose tissue gene expression and apoptosis. These findings shed light on the possible anti-adipogenic and anti-inflammatory effects of TRAIL and open new therapeutic possibilities against obesity, systemic inflammation and T2DM (Type 2 DM).

}, keywords = {Adiposity, Animals, Apoptosis, Calorimetry, Cytokines, Dietary Fats, Energy Intake, Glucose Tolerance Test, Hyperglycemia, Hyperinsulinism, Inflammation, Inflammation Mediators, Male, Mice, Mice, Inbred C57BL, Oxidation-Reduction, Palmitic Acid, Real-Time Polymerase Chain Reaction, TNF-Related Apoptosis-Inducing Ligand}, issn = {1470-8736}, doi = {10.1042/CS20120176}, author = {Bernardi, Stella and Zauli, Giorgio and Tikellis, Christos and Candido, Riccardo and Fabris, Bruno and Secchiero, Paola and Cooper, Mark E and Thomas, Merlin C} } @article {1917, title = {TRAIL as biomarker and potential therapeutic tool for cardiovascular diseases.}, journal = {Curr Drug Targets}, volume = {13}, year = {2012}, month = {2012 Aug}, pages = {1215-21}, abstract = {

This review focuses on TNF-related apoptosis-inducing ligand (TRAIL), also called Apo2 ligand, a protein belonging to the TNF superfamily. TRAIL can be found either in its transmembrane or circulating form, and its mostly studied peripheral effect is the induction of cellular apoptosis. Here, we discuss the evidences supporting the use of TRAIL as biomarker of cardiovascular diseases as well as the evidences showing the potential beneficial therapeutic effects of TRAIL on cardiovascular diseases and diabetes.

}, keywords = {Biological Markers, Cardiovascular Diseases, Humans, Prognosis, TNF-Related Apoptosis-Inducing Ligand}, issn = {1873-5592}, author = {Bernardi, Stella and Milani, Daniela and Fabris, Bruno and Secchiero, Paola and Zauli, Giorgio} } @article {1709, title = {TRAIL shows potential cardioprotective activity.}, journal = {Invest New Drugs}, volume = {30}, year = {2012}, month = {2012 Jun}, pages = {1257-60}, abstract = {

Recent clinical trials carried out in patients with advanced cancer have shown that recombinant TRAIL administration is usually safe and well tolerated when used either alone or in association with chemotherapeutic drugs. Notably, anticancer chemotherapy can be associated to cardiomiopathy. We have here demonstrated that TRAIL (administrated as either recombinant soluble TRAIL or as AAV-TRAIL expression viral vector) reduced the development of cardiomyopathy in the ApoE(-/-) diabetic mouse model. These data suggest, for the first time, that therapeutically administration of TRAIL might have a cardioprotective effect.

}, keywords = {Animals, Apolipoproteins E, Apoptosis, Cardiotonic Agents, Diabetes Mellitus, Experimental, Diabetes Mellitus, Type 1, Diabetic Cardiomyopathies, Fibrosis, Male, Mice, Mice, Knockout, Recombinant Proteins, TNF-Related Apoptosis-Inducing Ligand}, issn = {1573-0646}, doi = {10.1007/s10637-010-9627-8}, author = {Toffoli, Barbara and Bernardi, Stella and Candido, Riccardo and Zacchigna, Serena and Fabris, Bruno and Secchiero, Paola} } @article {1710, title = {Osteoprotegerin induces morphological and functional alterations in mouse pancreatic islets.}, journal = {Mol Cell Endocrinol}, volume = {331}, year = {2011}, month = {2011 Jan 1}, pages = {136-42}, abstract = {

Although serum osteoprotegerin (OPG) is significantly increased in diabetic subjects, its potential role in beta cell dysfunction has not been investigated. This study aimed to assess the effect of full-length OPG administered in vivo in mice on pancreatic islet structure and function and its interaction with the renin-angiotensin system (RAS). OPG-treated mice showed increased islet monocyte/macrophage infiltration, fibrosis and apoptosis with reduction of islet function. The remodeling of islet architecture was associated with increased pancreatic expression of components of the RAS, growth factor genes (transforming growth factor β and connective tissue growth factor) and inflammatory molecules (monocyte chemotactic protein-1 and vascular adhesion molecule type 1). Prevention of these changes with improvement of insulin secretion was observed in ramipril treated animals. Our data suggest that OPG might play an important role in promoting beta cell dysfunction and that the upregulation of the local RAS represents one possible mechanism responsible for the OPG-induced beta cell dysfunction.

}, keywords = {Animals, Apoptosis, Blood Glucose, Blood Pressure, Body Weight, Cell Lineage, Cell Movement, Chemokine CCL2, Connective Tissue Growth Factor, Fibrosis, Gene Expression Regulation, Humans, Insulin, Islets of Langerhans, Macrophages, Mice, Monocytes, Organ Size, Osteoprotegerin, Peptidyl-Dipeptidase A, Receptor, Angiotensin, Type 1, Systole, Transforming Growth Factor beta, Vascular Cell Adhesion Molecule-1}, issn = {1872-8057}, doi = {10.1016/j.mce.2010.08.019}, author = {Toffoli, Barbara and Bernardi, Stella and Candido, Riccardo and Sabato, Nicoletta and Carretta, Renzo and Corallini, Federica and Secchiero, Paola and Zauli, Giorgio and Fabris, Bruno} } @article {1784, title = {Osteoprotegerin promotes vascular fibrosis via a TGF-β1 autocrine loop.}, journal = {Atherosclerosis}, volume = {218}, year = {2011}, month = {2011 Sep}, pages = {61-8}, abstract = {

BACKGROUND: This study was designed to evaluate the potential role of osteoprotegerin (OPG) in arterial fibrosis.

METHODS: Aortic samples were analyzed after in vivo treatment of ApoE(-/-) mice with recombinant human OPG. Mouse vascular smooth muscle cells (VSMC) were exposed in vitro to recombinant OPG and analyzed for markers of inflammation and fibrosis, such as fibronectin, collagen I, III, IV and transforming growth factor-β1 (TGF-β1). Conversely, the potential modulation of endogenous OPG expression and release by VSMC was analyzed in response to different pro-atherosclerotic cytokines, TGF-β1, platelet derived growth factor (PDGF) and angiogensin II (Ang II).

RESULTS: In vivo treatment with human OPG induced signs of fibrosis and up-regulated the arterial expression of TGF-β1. Consistently, in vitro treatment of VSMC with human OPG induced the expression of fibronectin, collagen type I, III, IV, metalloprotein-2 (MMP-2) and MMP-9, as well as of TGF-β1. On the other hand, exposure to recombinant TGF-β1 promoted the expression/release of endogenous OPG and mediated the increase of OPG release induced by PDGF and Ang II in VSMC.

CONCLUSIONS: Taken together, these data support a pathogenic role for OPG in the development and progression of atherosclerotic lesions and suggest the existence of a vicious circle between TGF-β1 and OPG.

}, keywords = {Animals, Apolipoproteins E, Cell Proliferation, Collagen, Fibronectins, Fibrosis, Gene Expression Regulation, Humans, Mice, Mice, Inbred C57BL, Mice, Transgenic, Muscle, Smooth, Vascular, Myocytes, Smooth Muscle, Osteoprotegerin, Platelet-Derived Growth Factor, Transforming Growth Factor beta1}, issn = {1879-1484}, doi = {10.1016/j.atherosclerosis.2011.05.019}, author = {Toffoli, Barbara and Pickering, Raelene J and Tsorotes, Despina and Wang, Bo and Bernardi, Stella and Kantharidis, Phillip and Fabris, Bruno and Zauli, Giorgio and Secchiero, Paola and Thomas, Merlin C} } @article {1718, title = {Treatment with recombinant tumor necrosis factor-related apoptosis-inducing ligand alleviates the severity of streptozotocin-induced diabetes.}, journal = {Diabetes}, volume = {59}, year = {2010}, month = {2010 May}, pages = {1261-5}, abstract = {

OBJECTIVE: To evaluate the potential therapeutic effect of recombinant human tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) treatment in a model of type 1 diabetes.

RESEARCH DESIGN AND METHODS: Recombinant TRAIL was added in vitro to primary human and mouse peripheral blood mononuclear cells (PBMCs) and isolated human islets to evaluate the expression of the immunoregulatory gene SOCS1. Diabetes was induced by five consecutive daily injections of low-concentration (50 mg/kg) streptozotocin (STZ) in C57 black mice (n = 24). A group of these mice (n = 12) was co-injected with recombinant TRAIL (20 microg/day) for 5 days, and the diabetic status (glycemia and body weight) was followed over time. After 6 weeks, circulating levels of insulin, TNF-alpha, and osteoprotegerin (OPG) were measured, and animals were killed to perform the histological analysis of the pancreas.

RESULTS: The in vitro exposure of both PBMCs and human islets to recombinant TRAIL significantly upregulated the expression of SOCS1. With respect to STZ-treated animals, mice co-injected with STZ+TRAIL were characterized by 1) lower levels of hyperglycemia, 2) higher levels of body weight and insulinemia, 3) a partial preservation of pancreatic islets with normal morphology, and 4) a lower expression of both systemic (TNF-alpha and OPG) and pancreatic (vascular cell adhesion molecule [VCAM]-1) inflammatory markers.

CONCLUSIONS: Overall, these data demonstrate that the administration of recombinant TRAIL ameliorates the severity of STZ-induced type 1 diabetes, and this effect was accompanied by the upregulation of SOCS1 expression.

}, keywords = {Animals, Cells, Cultured, Diabetes Mellitus, Experimental, Gene Expression, Humans, Islets of Langerhans, Leukocytes, Mononuclear, Mice, Recombinant Proteins, Suppressor of Cytokine Signaling Proteins, TNF-Related Apoptosis-Inducing Ligand}, issn = {1939-327X}, doi = {10.2337/db09-1771}, author = {Zauli, Giorgio and Toffoli, Barbara and di Iasio, Maria Grazia and Celeghini, Claudio and Fabris, Bruno and Secchiero, Paola} }