Escherichia coli specific secretory IgA and cytokines in human milk from mothers of different ethnic groups resident in northern Italy.

Breast milk supplies many bioactive components. Neonates protection from pathogenic bacteria is mainly attributable to secretory IgA antibodies present in human milk in an amount depending on previous antigenic exposure. To bring new details into the field of immunological memory in secretory immunity, we evaluated the production of s-IgA specific for E. coli (E. coli s-IgA), and of proinflammatory (IL-6 and IL-8) or anti-inflammatory (IL-10) cytokines in the milk of mothers of different ethnic groups exposed in the past to poor conditions, but nowadays living in Italy in adequate conditions. Mothers from Italy, Africa, Asia and Eastern European Countries were included in the study. Anti- E. coli s-IgA, IL-6, IL-8 and IL-10 were determined by ELISA. Breast milk of all the foreign mothers presented higher levels of E. coli s-IgA than Italians, and for Asian and African mothers were significative (p=0.031 and p=0.015, respectively). Milk from women of Eastern European Countries revealed the highest IL-8 levels (p=0.026), while milk from Asian women presented the greatest concentration of IL-6 (p=0.04); however, the Africans reported the lowest concentrations of IL-10 (p=0.045). Since all the mothers had been living in Italy for some time, we believe that the presence of high levels of E. coli s-IgA, supported by high levels of pro-inflammatory cytokine, is part of a persisting immunological secretory memory

The red cell distribution width (RDW): value and role in preterm, IUGR (intrauterine growth restricted), full-term infants.

To measure the red cell distribution width (RDW) ranges at birth and to evaluate potential association with typical neonatal diseases: patent of the ductus arteriousus (PDA), bronchopulmonary dysplasia (BPD), and late-onset sepsis (LOS) mortality.Forty-six full-term, 41 preterm, and 35 intrauterine growth restricted (IUGR) infants participated in this retrospective, observational study. RDW was measured before 3 days of life (T0) in all infants, and at first month of life (T1) in preterm/IURG patients.RDW% mean (standard deviation) at T0 was: 15.65 (1.18) in full-term newborns; 17.7 (2.06) in preterm; 17.45 (1.81) in IUGR. A negative correlation (r = -0.51; P0.001) between RDW and gestational age was found. RDW at T1 was: 17.25 (2.19) in the preterm group; 17.37 (2.56) in IUGR group. Fourteen preterm infants reported: 12 PDA, 5 LOS, 4 BPD, and 3 died; 10 IUGR infants had: 4 PDA, 6 LOS, 3 BPD, and 1 died. RDW of IUGR infants suffering from those pathologies was not statistically different compared with unaffected infants, while preterm newborns with pathologies reported higher RDW: PDA vs. PDA absent: P = 0.008 at T0; P0.002 at T1. BPD vs. BPD absent: P0.005 at T1. LOS vs. LOS absent: P0.005 at T0. RDW in preterm/IUGR population was associated with early mortality, T0: dead 21.2 (2.7) vs. alive 16.7 (1.7), P0.0001.RDW and gestational age at birth were negatively correlated. High RDW resulted to be an indication of risk for critical newborns. This parameter can be inexpensively and routinely verified and further studies are required to confirm its prognostic role in neonatal pathologies

Integration of Biomechanical and Biological Characterization in the Development of Porous Poly(Caprolactone)-Based Membranes for Abdominal Wall Hernia Treatment.

AIMS: Synthetic meshes are the long-standing choice for the clinical treatment of abdominal wall hernias: the associated long-term complications have stimulated the development of a new-generation of bio-resorbable prostheses. In this work, polycaprolactone (PCL) porous membranes prepared by solvent casting/porogen leaching of PCL/poly(ethylene glycol) (PEG) blends with different compositions (different PCL/PEG weight ratio and PEG molecular weight) were investigated to be applied in the field. An optimal porous membrane structure was selected based on the evaluation of physicochemical, biomechanical and in-vitro biological properties, compared to a reference commercially available hernia mesh (CMC). FINDINGS: Selected PCL7-2i membranes (derived from PCL/PEG 70/30, PCL: Mw 70,000-90,000 Da; PEG: 35,000 Da) showed suitable pore size for the application, intermediate surface hydrophilicity and biomimetic mechanical properties. In-vitro cell tests performed on PCL7-2i membranes showed their cytocompatibility, high cell growth during 21 days, a reduced production of pro-inflammatory IL-6 respect to CMC and a significant secretion of Collagen Type I. CONCLUSIONS: PCL7-2i membranes showed biomimetic biomechanical properties and in-vitro biological properties similar to or even better than - in the case of anti-inflammatory behavior and collagen production - CMC, a commercially available product, suggesting potentially improved integration in the host tissue

Structure and rheology of polypropylene with various architectures prepared by coagent-assisted radical processing

The grafting of polar monomers to polyolefin backbones carried out in the melt in the presence of peroxides is accompanied by a restructuring of the pristine macromolecule architecture depending on reaction conditions and original polyolefin structure In the case of polypropylene (PP), side reactions, mainly degradation, are often controlled by the use of coagents which also provide a more complex scenario as far as possible reactions and final polymer structure are concerned We have demonstrated that 2 furyl acrylates are very active in maintaining the high molecular weight of PP during various functionalization processes carried out in the melt in the presence of peroxides In the study reported here, PP samples modified in the melt by free radical processes initiated with peroxides in the presence of butyl-3-(2-furyl) propenoate and its mixture with maleic anhydride were examined, and the effect of structural changes achieved were related to the rheology of the melt and morphological behaviour under heating Rheological analysis is consistent with the formation of long branched macromolecules to an increasing extent with increasing content of reagents with respect to the polyolefin Differential scanning calorimetry shows that the amount of long-chain branching is responsible for a decrease of the melting temperature and an increase of the crystallization temperature These results confirm that the functionalization coagent and monomer can give large macromolecule structure changes which can be driven in different directions depending on feed composition (C) 2010 Society of Chemical Industr

Escherichia Coli

Breast milk supplies many bioactive components. Neonates protection from pathogenic bacteria is mainly attributable to secretory IgA antibodies present in human milk in an amount depending on previous antigenic exposure. To bring new details into the field of immunological memory in secretory immunity, we evaluated the production of s-IgA specific for E. coli (E. coli s-IgA), and of proinflammatory (IL-6 and IL-8) or anti-inflammatory (IL-10) cytokines in the milk of mothers of different ethnic groups exposed in the past to poor conditions, but nowadays living in Italy in adequate conditions. Mothers from Italy, Africa, Asia and Eastern European Countries were included in the study. Anti- E. coli s-IgA, IL-6, IL-8 and IL-10 were determined by ELISA. Breast milk of all the foreign mothers presented higher levels of E. coli s-IgA than Italians, and for Asian and African mothers were significative (p=0.031 and p=0.015, respectively). Milk from women of Eastern European Countries revealed the highest IL-8 levels (p=0.026), while milk from Asian women presented the greatest concentration of IL-6 (p=0.04); however, the Africans reported the lowest concentrations of IL-10 (p=0.045). Since all the mothers had been living in Italy for some time, we believe that the presence of high levels of E. coli s-IgA, supported by high levels of pro-inflammatory cytokine, is part of a persisting immunological secretory memory

Diagnostic performance of triggering receptor expressed on myeloid cells-1 and CD64 index as markers of sepsis in preterm newborns

CD64 index and triggering receptor expressed on myeloid cells-1 are biomarkers on neutrophil polymorphonuclear cells with crucial role in sepsis. The study aim is to assess diagnostic performance, individually and combined, of CD64 index and triggering receptor expressed on myeloid cells-1 (surface marker/soluble form), in late-onset sepsis of preterm infants