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Dragoni S.,University of Pavia | Laforenza U.,University of Pavia | Bonetti E.,Center for the Study of Myelofibrosis | Lodola F.,University of Pavia | And 7 more authors.
Stem Cells and Development | Year: 2013

Endothelial colony-forming cells (ECFCs) are the only endothelial progenitor cells (EPCs) that are capable of acquiring a mature endothelial phenotype. ECFCs are mainly mobilized from bone marrow to promote vascularization and represent a promising tool for cell-based therapy of severe ischemic diseases. Vascular endothelial growth factor (VEGF) stimulates the proliferation of peripheral blood-derived ECFCs (PB-ECFCs) through oscillations in intracellular Ca2+ concentration ([Ca2+]i). VEGF-induced Ca2+ spikes are driven by the interplay between inositol-1,4,5-trisphosphate (InsP3)-dependent Ca2+ release and store-operated Ca2+ entry (SOCE). The therapeutic potential of umbilical cord blood-derived ECFCs (UCB-ECFCs) has also been shown in recent studies. However, VEGF-induced proliferation of UCB-ECFCs is faster compared with their peripheral counterpart. Unlike PB-ECFCs, UCB-ECFCs express canonical transient receptor potential channel 3 (TRPC3) that mediates diacylglycerol-dependent Ca2+ entry. The present study aimed at investigating whether the higher proliferative potential of UCB-ECFCs was associated to any difference in the molecular underpinnings of their Ca 2+ response to VEGF. We found that VEGF induces oscillations in [Ca2+]i that are patterned by the interaction between InsP3-dependent Ca2+ release and SOCE. Unlike PB-ECFCs, VEGF-evoked Ca2+ oscillations do not arise in the absence of extracellular Ca2+ entry and after pharmacological (with Pyr3 and flufenamic acid) and genetic (by employing selective small interference RNA) suppression of TRPC3. VEGF-induced UCB-ECFC proliferation is abrogated on inhibition of the intracellular Ca2+ spikes. Therefore, the Ca 2+ response to VEGF in UCB-ECFCs is shaped by a different Ca 2+ machinery as compared with PB-ECFCs, and TRPC3 stands out as a promising target in EPC-based treatment of ischemic pathologies. © Mary Ann Liebert, Inc. Source

Fanos V.,Puericulture Institute and Neonatal Section | Cristina Pintus M.,Puericulture Institute and Neonatal Section | Lussu M.,University of Cagliari | Atzori L.,University of Cagliari | And 14 more authors.
Journal of Maternal-Fetal and Neonatal Medicine | Year: 2014

Objective: Bronchopulmonary dysplasia (BPD) or chronic lung disease is one of the principal causes of mortality and morbidity in preterm infants. Early identification of infants at the greater risk of developing BPD may allow a targeted approach for reducing disease severity and complications. The trigger cause of the disease comprehends the impairment of the alveolar development and the increased angiogenesis. Nevertheless, the molecular pathways characterizing the disease are still unclear. Therefore, the use of the metabolomics technique, due to the capability of identifying instantaneous metabolic perturbation, might help to recognize metabolic patterns associated with the condition.Methods: The purpose of this study is to compare urinary metabolomics at birth in 36 newborns with a gestational age below 29 weeks and birth weight <1500 g (very low birth weight-VLBW), admitted in Neonatal Intensive Care Unit (NICU) divided into two groups: the first group (18 cases) consisting of newborns who have not yet developed the disease, but who will subsequently develop it and the second group (18 controls) consisting of newborns not affected by BPD. Urine samples were collected within 24-36 h of life and immediately frozen at-80 °C.Results: The 1H-NMR spectra were analyzed using a partial least squares discriminant analysis (PLS-DA) model coupled with orthogonal Signal Correction. Using this approach it was possible with urine at birth to discriminate newborns that will be later have a diagnosis of BPD with a high statistics power. In particular, we found five important discriminant metabolites in urine in BPD newborns: lactate, taurine, TMAO, myoinositol (which increased) and gluconate (which decreased).Conclusion: These preliminary results seem to be promising for the identification of predictor's biomarkers characterizing the BPD condition. These data may suggest that BPD is probably the result of an abnormal development (respiratory bud, vascular tree, hypodysplasia of pneumocytes) and could be considered a congenital disease (genetics plus intrauterine epigenetics). Early identification of infants at the greater risk of developing BPD may allow a targeted approach for reducing disease severity and complications. © 2014 Informa UK Ltd. Source

Dessi A.,University of Cagliari | Liori B.,University of Cagliari | Caboni P.,University of Cagliari | Corsello G.,University of Palermo | And 7 more authors.
Journal of Maternal-Fetal and Neonatal Medicine | Year: 2014

The objective of our study was to evaluate the capability of the metabolomics approach to identify the variations of urine metabolites over time related to the neonatal fungal septic condition. The study population included a clinical case of a preterm neonate with invasive fungal infection and 13 healthy preterm controls. This study showed a unique urine metabolic profile of the patient affected by fungal sepsis compared to urine of controls and it was also possible to evaluate the efficacy of therapy in improving patient health. © 2014 Informa UK Ltd. Source

Fanos V.,University of Cagliari | Caboni P.,University of Cagliari | Corsello G.,University of Palermo | Stronati M.,Neonatal Unit and Neonatal Intensive Care Unit | And 13 more authors.
Early Human Development | Year: 2014

The purpose of this article is to study one of the most significant causes of neonatal morbidity and mortality: neonatal sepsis. This pathology is due to a bacterial or fungal infection acquired during the perinatal period. Neonatal sepsis has been categorized into two groups: early onset if it occurs within 3-6 days and late onset after 4-7 days. Due to the not-specific clinical signs, along with the inaccuracy of available biomarkers, the diagnosis is still a major challenge. In this regard, the use of a combined approach based on both nuclear magnetic resonance (1H-NMR) and gas-chromatography-mass spectrometry (GC-MS) techniques, coupled with a multivariate statistical analysis, may help to uncover features of the disease that are still hidden. The objective of our study was to evaluate the capability of the metabolomics approach to identify a potential metabolic profile related to the neonatal septic condition. The study population included 25 neonates (15 males and 10 females): 9 (6 males and 3 females) patients had a diagnosis of sepsis and 16 were healthy controls (9 males and 7 females). This study showed a unique metabolic profile of the patients affected by sepsis compared to non-affected ones with a statistically significant difference between the two groups (p = 0.05). © 2014 Elsevier Ireland Ltd. Source

Longo S.,Neonatal Intensive Care Unit | Bollani L.,Neonatal Intensive Care Unit | Decembrino L.,Neonatal Intensive Care Unit | Di Comite A.,Neonatal Intensive Care Unit | And 3 more authors.
Journal of Maternal-Fetal and Neonatal Medicine | Year: 2013

Intrauterine Growth Retardation (IUGR) is defined as a rate of growth of a fetus that is less than normal for the growth potential of the fetus (for that particular gestational age). Small for Gestational Age (SGA) is defined infant born following IUGR, with a weight at birth below the 10th percentile.Suboptimal fetal growth occurring in IUGR fetuses is an important cause of perinatal mortality and morbidity. The acute neonatal consequences of IUGR include metabolic and hematological disturbances, and disrupted thermoregulation; in addition, respiratory distress (RDS), necrotizing enterocolitis (NEC), and retinopathy of prematurity (ROP) may contribute to perinatal morbidity. Metabolic disturbances are related to glucose and fatty acid metabolism. It is well-known that individuals who display poor growth in utero are at significantly increased risk for type 2 diabetes mellitus (T2DM), obesity, hypertension, dyslipidemia, and insulin resistance (the so-called metabolic syndrome, MS). MS ultimately leads to the premature development of cardiovascular diseases. In addition, short stature in children and adults, premature adrenarche, and the polycystic ovarian syndrome (PCOS) are endocrinological sequelae of IUGR. (8) Early onset growth delay and prematurity significantly increase the risk for neurological sequelae and motor and cognitive delay.Future prospective studies need to investigate risk factors for infants who are SGA. If reliable prediction can be achieved, there is potential to reduce future perinatal morbidity and mortality, and long term consequences among SGA babies. © 2013 Informa UK, Ltd. Source

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