First molecular detection of Leishmania infantum in Sergentomyia minuta (Diptera, Psychodidae) in Alentejo, southern Portugal

Protozoan parasites, such as Leishmania spp., are the causative agents of many insect-borne infectious diseases with medical and veterinary importance. Leishmaniasis, caused by Leishmania spp., is transmitted by female phlebotomine sand flies. In the Alentejo region of Portugal, located at the north of Algarve, cases of human and canine leishmaniasis caused by Leishmania infantum have been notified. However, no recent studies regarding the sand fly fauna in the region are available. We therefore aimed to explore the phlebotomine sand fly species found in both, Évora and Beja Districts, to gain an insight about the leishmaniasis epidemiology in these areas. After the identification of the insect species, PCR molecular tests were used to assess L. infantum infection rate in the sand fly captured females, together with the analysis of blood meal sources of the insect vectors. One Sergentomyia minuta female was positive for L. infantum infection and another for human blood as a meal source. The occurrence of this phlebotomine species infected with L. infantum may suggest that, in the Mediterranean basin, leishmaniasis epidemiology is changing. Also, if the importance of S. minuta for the zoonotic and anthroponotic cycle of leishmaniasis is later proven, the strategies to control its vector will inevitably to be rethought.

Resemblance in physical activity levels: The Portuguese sibling study on growth, fitness, lifestyle, and health

OBJECTIVES

To investigate the relationships of biological, behavioral, familial, and environmental characteristics with siblings´ physical activity (PA) levels as well as the intrapair resemblance in PA.

METHODS

The sample comprises 834 (390 females) biological siblings [brother-brother (BB), sister-sister (SS), brother-sister (BS)] aged 9 to 20 years. Total PA index (TPAI) was estimated by questionnaire. Information on potential behavioral, familial, and environmental correlates was obtained by self-report; body mass index (BMI), biological maturation, and physical fitness were measured. Multilevel models were used to analyze siblings´ clustered data, and sibling resemblance was estimated with the intraclass correlation (ρ).

RESULTS

On average, younger sibs, those more physically fit, and those with more parental support had greater TPAI. Further, BB pairs had higher TPAI levels than SS or BS pairs, but also had greater within-pair variance. When adjusted for all covariates, SS pairs demonstrated greater resemblance in TPAI (ρ = 0.53, 95%CI = 0.38-0.68) than BS (ρ = 0.26, 95%CI = 0.14-0.43) or BB pairs (ρ = 0.18, 95%CI = 0.06-0.44).

CONCLUSIONS

Age, physical fitness, and parental support were the best predictors of TPAI levels. A moderate level of resemblance in TPAI was observed in SS pairs, while lower resemblance was found for BS and BB pairs. These findings may be due to differences in the roles of shared genetic factors, familial, and environmental characteristics across different sibling types.

Mapping landslide susceptibility using data-driven methods

Most epistemic uncertainty within data-driven landslide susceptibility assessment results from errors in landslide inventories, difficulty in identifying and mapping landslide causes and decisions related with the modelling procedure. In this work we evaluate and discuss differences observed on landslide susceptibility maps resulting from: (i) the selection of the statistical method; (ii) the selection of the terrain mapping unit; and (iii) the selection of the feature type to represent landslides in the model (polygon versus point). The work is performed in a single study area (Silveira Basin - 18.2km² - Lisbon Region, Portugal) using a unique database of geo-environmental landslide predisposing factors and an inventory of 82 shallow translational slides. The logistic regression, the discriminant analysis and two versions of the information value were used and we conclude that multivariate statistical methods perform better when computed over heterogeneous terrain units and should be selected to assess landslide susceptibility based on slope terrain units, geo-hydrological terrain units or census terrain units. However, evidence was found that the chosen terrain mapping unit can produce greater differences on final susceptibility results than those resulting from the chosen statistical method for modelling. The landslide susceptibility should be assessed over grid cell terrain units whenever the spatial accuracy of landslide inventory is good. In addition, a single point per landslide proved to be efficient to generate accurate landslide susceptibility maps, providing the landslides are of small size, thus minimizing the possible existence of heterogeneities of predisposing factors within the landslide boundary. Although during last years the ROC curves have been preferred to evaluate the susceptibility model's performance, evidence was found that the model with the highest AUC ROC is not necessarily the best landslide susceptibility model, namely when terrain mapping units are heterogeneous in size and reduced in number.

In situ evaluation of water and energy consumptions at the end use level: The influence of flow reducers and temperature in baths

Nowadays, water and energy consumption is intensifying every year in most of the countries. This perpetual increase will not be supportable in the long run, making urgently to manage these resources on a sustainable way. Domestic consumptions of water and electric energy usually are related and it's important to study that relation, identifying opportunities for use efficient improvement. In fact, without an understanding of water-energy relations, there are water efficiency measures that may lead to unintentional costs in the energy efficiency field. In order to take full advantage of combined effect between water and energy water management methodologies, it is necessary to collect data to ensure that the efforts are directed through the most effective paths. This paper presents a study based in the characterization, measurement and analysis of water and electricity consumption in a single family house (2months period) in order to find an interdependent relationship between consumptions at the end user level. The study was carried out on about 200 baths, divided in four different scenarios where the influence of two variables was tested: the flow reducer valve and the bath temperature. Data showed that the presence of flow reducer valve decreased electric energy consumption and water consumption, but increased the bath duration. Setting a lower temperature in water-heater, decreased electric consumption, water consumption and bath duration. Analysing the influence of the flow reducer valve and 60°C temperature simultaneously, it was concluded that it had a significant influence on electric energy consumption and on the baths duration but had no influence on water consumption.

Plasma Amino Acids vs Conventional Predictors of Insulin Resistance Measured by the Hyperinsulinemic Clamp

Context:

Specific plasma amino acid (AA) profiles including elevated postabsorptive branched-chain amino acids (BCAAs) have been associated with insulin resistance (IR), mostly estimated by homeostatic model assessment. This study assessed the associations of postabsorptive AAs with IR directly measured by insulin-mediated glucose disposal and determined the quantitative value of AAs and conventional IR predictors.

Design:

Fifty-one healthy, 31 overweight or obese (Ow/Ob), and 52 men and women with type 2 diabetes (T2D) were studied retrospectively. The main outcome measures were the glucose disposal (M/I) index (using 3-[³H]-glucose) during a hyperinsulinemic–euglycemic clamp and whole-body protein turnover (using 1-[¹³C]-leucine).

Results:

Compared with healthy participants, M/I was lower in Ow/Ob participants and lowest in those with T2D. BCAAs, glutamate, and lysine were higher in the Ow/Ob and T2D groups than in healthy participants; glycine and threonine were lower. Most AAs were higher in men. Principal component analysis identified component 1 (C1: BCAAs, methionine) and C3 (glycine, threonine, serine). Glutamate, C1, ornithine, lysine, methionine, and tyrosine correlated negatively with M/I; C3 and glycine correlated positively. Waist circumference and sex strongly influenced AA–IR relationships; only glutamate correlated after these factors were controlled for. From regression analysis, waist circumference, fasting glucose, insulin, and free fatty acids (FFAs) negatively predicted 64% of the M/I variance; glutamate added 2% more. In nondiabetic participants, IR was predicted by waist circumference, insulin, and FFAs, without contribution from AAs.

Conclusion:

Several postabsorptive AAs correlated with IR but added limited predictive value to conventional markers because levels were determined largely by abdominal adiposity. Data suggest a sex-specific regulation of AA metabolism by excess adiposity, particularly the BCAAs, warranting investigation.

S, Daly F, Nasri R, Ben Lakhal S, Paramba F, Purayil N, Naushad V, Mohammad O, Negi V, Chandra P, Kleinsasser A, Witrz MR, Buchner-Doeven JF, Tuip-de Boer AM, Goslings JC, Juffermans NP, Van Hezel M, Straat M, Boing A, Van Bruggen R, Juffermans N, Markopoulou D, Venetsanou K, Kaldis V, Koutete D, Chroni D, Alamanos I, Koch L, Jancik J, Rhodes H, Walter E, Maekawa K, Hayakawa M, Kushimoto S, Shiraishi A, Kato H, Sasaki J, Ogura H, Matauoka T, Uejima T, Morimura N, Ishikura H, Hagiwara A, Takeda M, Tarabrin O, Shcherbakow S, Gavrychenko D, Mazurenko G, Ivanova V, Chystikov O, Plourde C, Lessard J, Chauny J, Daoust R, Shcherbakow S, Tarabrin O, Gavrychenko D, Mazurenko G, Chystikov O, Vakalos A, Avramidis V, Kropman L, In het Panhuis L, Konings J, Huskens D, Schurgers E, Roest M, De Laat B, Lance M, Durila M, Lukas P, Astraverkhava M, Jonas J, Budnik I, Shenkman B, Hayami H, Koide Y, Goto T, Iqbal R, Alhamdi Y, Venugopal N, Abrams S, Downey C, Toh CH, Welters ID, Bombay VB, Chauny JM, Daoust RD, Lessard JL, Marquis MM, Paquet JP, Siemens K, Sangaran D, Hunt BJ, Durward A, Nyman A, Murdoch IA, Tibby SM, Ampatzidou F, Moisidou D, Dalampini E, Nastou M, Vasilarou E, Kalaizi V, Chatzikostenoglou H, Drossos G, Spadaro S, Fogagnolo A, Fiore T, Schiavi A, Fontana V, Taccone F, Volta C, Chochliourou E, Volakli E, Violaki A, Samkinidou E, Evlavis G, Panagiotidou V, Sdougka M, Mothukuri R, Battle C, Guy K, Mills G, Evans P, Wijesuriya J, Keogh S, Docherty A, O’Donnell R, Brunskill S, Trivella M, Doree C, Holst L, Parker M, Gregersen M, Almeida J, Walsh T, Stanworth S, Moravcova S, Mansell J, Rogers A, Smith RA, Hamilton-Davies C, Omar A, Allam M, Bilala O, Kindawi A, Ewila H, Ampatzidou F, Moisidou D, Nastou M, Dalampini E, Malamas A, Vasilarou E, Drossos G, Ferreira G, Caldas J, Fukushima J, Osawa EA, Arita E, Camara L, Zeferino S, Jardim J, Gaioto F, Dallan L, Jatene FB, Kalil Filho R, Galas F, Hajjar LA, Mitaka C, Ohnuma T, Murayama T, Kunimoto F, Nagashima M, Takei T, Tomita M, Omar A, Mahmoud K, Hanoura S, Sudarsanan S, Sivadasan P, Othamn H, Shouman Y, Singh R, Al Khulaifi A, Mandel I, Mikheev S, Suhodolo I, Kiselev V, Svirko Y, Podoksenov Y, Jenkins SA, Griffin R, Tovar Doncel MS, Lima A, Aldecoa C, Ince C, Taha A, Shafie A, Mostafa M, Syed N, Hon H, Righetti F, Colombaroli E, Castellano G, Righetti F, Colombaroli E, Hravnak M, Chen LC, Dubrawski AD, Clermont GC, Pinsky MR, Gonzalez S, Macias D, Acosta J, Jimenez P, Loza A, Lesmes A, Lucena F, Leon C, Tovar Doncel MS, Ince C, Aldecoa C, Lima A, Bastide M, Richecoeur J, Frenoy E, Lemaire C, Sauneuf B, Tamion F, Nseir S, Du Cheyron D, Dupont H, Maizel J, Shaban M, Kolko R, Salahuddin N, Sharshir M, AbuRageila M, AlHussain A, Mercado P, Maizel J, Kontar L, Titeca D, Brazier F, Riviere A, Joris M, Soupison T, De Cagny B, Slama M, Wagner J, Körner A, Kubik M, Kluge S, Reuter D, Saugel B, Colombaroli E, Righetti F, Castellano G, Tran T, De Bels D, Cudia A, Strachinaru M, Ghottignies P, Devriendt J, Pierrakos C, Martínez González Ó, Blancas R, Luján J, Ballesteros D, Martínez Díaz C, Núñez A, Martín Parra C, López Matamala B, Alonso Fernández M, Chana M, Huber W, Eckmann M, Elkmann F, Gruber A, Klein I, Schmid RM, Lahmer T, Moller PW, Sondergaard S, Jakob SM, Takala J, Berger D, Bastoni D, Aya H, Toscani L, Pigozzi L, Rhodes A, Cecconi M, Ostrowska C, Aya H, Abbas A, Mellinghoff J, Ryan C, Dawson D, Rhodes A, Cecconi M, Cronhjort M, Wall O, Nyberg E, Zeng R, Svensen C, Mårtensson J, Joelsson-Alm E, Aguilar Arzapalo M, Barradas L, Lopez V, Cetina M, Parenti N, Palazzi C, Amidei LA, Borrelli FB, Campanale SC, Tagliazucchi FT, Sedoni GS, Lucchesi DL, Carella EC, Luciani AL, Mackovic M, Maric N, Bakula M, Aya H, Rhodes A, Grounds RM, Fletcher N, Cecconi M, Avard B, Zhang P, Mezidi M, Charbit J, Ould-Chikh M, Deras P, Maury C, Martinez O, Capdevila X, Hou P, Linde-Zwirble WZ, Douglas ID, Shapiro NS, Ben Souissi A, Mezghani I, Ben Aicha Y, Kamoun S, Laribi B, Jeribi B, Riahi A, Mebazaa MS, Pereira C, Marinho R, Antunes R, Marinho A, Crivits M, Raes M, Decruyenaere J, Hoste E, Bagin V, Rudnov V, Savitsky A, Astafyeva M, Korobko I, Vein V, Kampmeier T, Arnemann P, Hessler M, Wald A, Bockbreder K, Morelli A, Van Aken H, Rehberg S, Ertmer C, Arnemann P, Hessler M, Kampmeier T, Rehberg S, Van Aken H, Ince C, Ertmer C, Reddy S, Bailey M, Beasley R, Bellomo R, Mackle D, Psirides A, Young P, Reddy S, Bailey M, Beasley R, Bellomo R, Mackle D, Young P, Venkatesh H, Ramachandran S, Basu A, Nair H, Egan S, Bates J, Oliveira S, Rangel Neto NR, Reis FQ, Lee CP, Lin XL, Choong C, Eu KM, Sim WY, Tee KS, Pau J, Abisheganaden J, Maas K, De Geus H, Lafuente E, Marinho R, Moura J, Antunes R, Marinho A, Doris TE, Monkhouse D, Shipley T, Kardasz S, Gonzalez I, Stads S, Groeneveld AJ, Elsayed I, Ward N, Tridente A, Raithatha A, Steuber A, Pelletier C, Schroeder S, Michael E, Slowinski T, Kindgen-Milles D, Ghabina S, Turani F, Belli A, Busatti S, Barettin G, Candidi F, Gargano F, Barchetta R, Falco M, Demirkiran O, Kosuk M, Bozbay S, Weber V, Hartmann J, Harm S, Linsberger I, Eichhorn T, Valicek G, Miestinger G, Hoermann C, Faenza S, Ricci D, Mancini E, Gemelli C, Cuoghi A, Magnani S, Atti M, Laddomada T, Doronzio A, Balicco B, Gruda MC, O’Sullivan P, Dan VP, Guliashvili T, Scheirer A, Golobish TD, Capponi VJ, Chan PP, Kogelmann K, Drüner M, Jarczak D, Turani F, Belli AB, Martni SM, Cotticelli VC, Mounajergi F, Barchetta R, Morimoto S, Ishikura H, Hussain I, Salahuddin N, Nadeem A, Ghorab K, Maghrabi K, Kloesel SK, Goldfuss C, Stieglitz A, Stieglitz AS, Krstevska L, Albuszies G, Aguilar Arzapalo M, Barradas L, Lopez V, Escalante A, Jimmy G, Cetina M, Izawa J, Iwami T, Uchino S, Takinami M, Kitamura T, Kawamura T, Powell-Tuck JG, Crichton S, Raimundo M, Camporota L, Wyncoll D, Ostermann M, Hana A, De Geus HR, De Geus HR, Hana A, Aydogdu M, Boyaci N, Yuksel S, Gursel G, Cayci Sivri AB, Meza-Márquez J, Nava-López J, Carrillo-Esper R, Dardashti A, Grubb A, Maizel J, Wetzstein M, Titeca D, Kontar L, Brazier F, De Cagny B, Riviere A, Soupison T, Joris M, Slama M, Peters E, Njimi H, Pickkers P, Vincent JL, Waraich M, Doyle J, Samuels T, Forni L, Desai N, Baumber R, Gunning P, Sell A, Lin S, Torrence H, O’Dwyer M, Kirwan C, Prowle J, Kim T, O’Connor ME, Hewson RW, Kirwan CJ, Pearse RM, Prowle J, Hanoura S, Omar A, Othamn H, Sudarsanan S, Allam M, Maksoud M, Singh R, Al Khulaifi A, O’Connor ME, Hewson RW, Kirwan CJ, Pearse RM, Prowle J, Uzundere O, Memis D, Ýnal M, Gultekin A, Turan N, Aydin MA, Basar H, Sencan I, Kapuagasi A, Ozturk M, Uzundurukan Z, Gokmen D, Ozcan A, Kaymak C, Artemenko VA, Budnyuk A, Pugh R, Bhandari S, Mauri T, Turrini C, Langer T, Taccone P, Volta CA, Marenghi C, Gattinoni L, Pesenti A, Sweeney L, O’Sullivan A, Kelly P, Mukeria E, MacLoughlin R, Pfeffer M, Thomas JT, Bregman GB, Karp GK, Kishinevsky EK, Stavi DS, Adi NA, Poropat T, Knafelj R, Llopart E, Batlle M, De Haro C, Mesquida J, Artigas A, Pavlovic D, Lewerentz L, Spassov A, Schneider R, De Smet S, De Raedt S, Derom E, Depuydt P, Oeyen S, Benoit D, Decruyenaere J, Gobatto A, Besen B, Tierno P, Melro L, Mendes P, Cadamuro F, Park M, Malbouisson LM, Civantos BC, Lopez JL, Robles A, Figueira J, Yus S, Garcia A, Oglinda A, Ciobanu G, Oglinda C, Schirca L, Sertinean T, Lupu V, Kelly P, O’Sullivan A, Sweeney L, MacLoughlin R, O’Sullivan A, Kelly P, Sweeney L, Mukeria E, Wolny M, MacLoughlin R, Pagano A, Numis F, Visone G, Saldamarco L, Russo T, Porta G, Paladino F, Bell C, Liu J, Debacker J, Lee C, Tamberg E, Campbell V, Mehta S, Silva-Pinto A, Sarmento A, Santos L, Kara Ý, Yýldýrým F, Zerman A, Güllü Z, Boyacý N, Basarýk Aydogan B, Gaygýsýz Ü, Gönderen K, Arýk G, Turkoglu M, Aydogdu M, Aygencel G, Ülger Z, Gursel G, Boyacý N, Isýkdogan Z, Özdedeoglu Ö, Güllü Z, Badoglu M, Gaygýsýz U, Aydogdu M, Gursel G, Kongpolprom N, Sittipunt C, Eden A, Kokhanovsky Y, Bursztein – De Myttenaere S, Pizov R, Neilans L, MacIntyre N, Radosevich M, Wanta B, Weber V, Meyer T, Smischney N, Brown D, Diedrich D, Fuller A, McLindon P, Sim K, Shoaeir M, Noeam K, Mahrous A, Matsa R, Ali A, Dridi C, Koubaji S, Kamoun S, Haddad F, Ben Souissi A, Laribi B, Riahi A, Mebazaa MS, Pérez-Calatayud A, Carrillo-Esper R, Zepeda-Mendoza A, Diaz-Carrillo M, Arch-Tirado E, Carbognin S, Pelacani L, Zannoni F, Agnoli A, Gagliardi G, Cho R, Adams A, Lunos S, Ambur S, Shapiro R, Prekker M, Thijssen M, Janssen L, Foudraine N, Voscopoulos CJ, Freeman J, Voscopoulos CJ, Freeman J, George E, Voscopoulos CJ, Eversole D, Freeman J, George E, Muttini S, Bigi R, Villani G, Patroniti N, Williams G, Voscopoulos CJ, Freeman J, George E, Waldmann A, Böhm S, Windisch W, Strassmann S, Karagiannidis C, Waldmann A, Böhm S, Windisch W, Strassmann S, Karagiannidis C, Karagiannidis CK, Waldmann AW, Böhm SB, Strassmann S, Windisch WW, Persson P, Lundin S, Stenqvist O, Porta G, Numis F, Serra CS, Pagano AP, Masarone MM, Rinaldi LR, Amelia AA, Fascione MF, Adinolfi LA, Ruggiero ER, Asota F, O’Rourke K, Ranjan S, Morgan P, DeBacker JW, Tamberg E, O’Neill L, Munshi L, Burry L, Fan E, Mehta S, Poo S, Mahendran K, Fowles J, Gerrard C, Vuylsteke A, Loveridge R, Chaddock C, Patel S, Kakar V, Willars C, Hurst T, Park C, Best T, Vercueil A, Auzinger G, Borgman A, Proudfoot AG, Grins E, Emiley KE, Schuitema J, Fitch SJ, Marco G, Sturgill J, Dickinson MG, Strueber M, Khaghani A, Wilton P, Jovinge SM, Sampson C, Harris-Fox S, Cove ME, Vu LH, Sen A, Federspiel WJ, Kellum JA, Mazo Torre C, Riera J, Ramirez S, Borgatta B, Lagunes L, Rello J, Kuzovlev AK, Moroz V, Goloubev A, Polovnikov S, Nenchuk S, Karavana V, Glynos C, Asimakos A, Pappas K, Vrettou C, Magkou M, Ischaki E, Stathopoulos G, Zakynthinos S, Spadaro S, Kozhevnikova I, Dalla Corte F, Grasso S, Casolari P, Caramori G, Volta C, Andrianjafiarinoa T, Randriamandrato T, Rajaonera T, El-Dash S, Costa ELV, Tucci MR, Leleu F, Kontar L, De Cagny B, Brazier F, Titeca D, Bacari-Risal G, Maizel J, Amato M, Slama M, Mercado P, Maizel J, Kontar L, Titeca D, Brazier F, Riviere A, Joris M, Soupison T, De Cagny B, El Dash S, Slama M, Remmington, Fischer A, Squire S, Boichat M, Honzawa H, Yasuda H, Adati T, Suzaki S, Horibe M, Sasaki M, Sanui M, Marinho R, Daniel J, Miranda H, Marinho A, Milinis K, Cooper M, Williams GR, McCarron E, Simants S, Patanwala I, Welters I, Su Y, Fernández Villanueva J, Fernández Garda R, López Lago A, Rodríguez Ruíz E, Hernández Vaquero R, Tomé Martínez de Rituerto S, Varo Pérez E, Lefel N, Schaap F, Bergmans D, Olde Damink S, Van de Poll M, Tizard K, Lister C, Poole L, Ringaitiene D, Gineityte D, Vicka V, Norkiene I, Sipylaite J, O’Loughlin A, Maraj V, Dowling J, Velasco MB, Dalcomune DM, Dias EB, Fernandes SL, Oshima T, Graf S, Heidegger C, Genton L, Karsegard V, Dupertuis Y, Pichard C, Friedli N, Stanga Z, Mueller B, Schuetz P, Vandersteen L, Stessel B, Evers S, Van Assche A, Jamaer L, Dubois J, Marinho R, Castro H, Moura J, Valente J, Martins P, Casteloes P, Magalhaes C, Cabral S, Santos M, Oliveira B, Salgueiro A, Marinho A, Marinho R, Santos M, Lafuente E, Castro H, Cabral S, Moura J, Martins P, Oliveira B, Salgueiro A, Duarte S, Castro S, Melo M, Casteloes P, Marinho A, Gray S, Maipang K, Bhurayanontachai R, Grädel LG, Schütz P, Langlois P, Manzanares W, Tincu R, Cobilinschi C, Tomescu D, Ghiorghiu Z, Macovei R, Manzanares W, Langlois P, Lemieux M, Elke G, Bloos F, Reinhart K, Heyland D, Langlois P, Lemieux M, Aramendi I, Heyland D, Manzanares W, Su Y, Marinho R, Babo N, Marinho A, Hoshino M, Haraguchi Y, Kajiwara S, Mitsuhashi T, Tsubata T, Aida M, Rattanapraphat T, Bhurayanontachai R, Kongkamol C, Khwannimit B, Marinho R, Santos M, Castro H, Lafuente E, Salgueiro A, Cabral S, Martins P, Moura J, Oliveira B, Melo M, Xavier B, Valente J, Magalhaes C, Casteloes P, Marinho A, Moisidou D, Ampatzidou F, Koutsogiannidis C, Moschopoulou M, Drossos G, Taskin G, Çakir M, Güler AK, Taskin A, Öcal N, Özer S, Yamanel L, Wong JM, Fitton C, Anwar S, Stacey S, Aggou M, Fyntanidou B, Patsatzakis S, Oloktsidou E, Lolakos K, Papapostolou E, Grosomanidis V, Suda S, Ikeda T, Ono S, Ueno T, Izutani Y, Gaudry S, Desailly V, Pasquier P, Brun PB, Tesnieres AT, Ricard JD, Dreyfuss D, Mignon A, White JC, Molokhia A, Dean A, Stilwell A, Friedlaender G, Peters M, Stipulante S, Delfosse A, Donneau AF, Ghuysen A, Feldmann C, Freitag D, Dersch W, Irqsusi M, Eschbach D, Steinfeldt T, Wulf H, Wiesmann T, Kongpolprom N, Cholkraisuwat J, Beitland S, Nakstad E, Stær-Jensen H, Drægni T, Andersen G, Jacobsen D, Brunborg C, Waldum-Grevbo B, Sunde K, Hoyland K, Pandit D, Hayakawa K, Oloktsidou E, Kotzampassi K, Fyntanidou B, Patsatzakis S, Loukipoudi L, Doumaki E, Grosomanidis V, Yasuda H, Admiraal MM, Van Assen M, Van Putten MJ, Tjepkema-Cloostermans M, Van Rootselaar AF, Horn J, Ragusa F, Marudi A, Baroni S, Gaspari A, Bertellini E, Taha A, Abdullah T, Abdel Monem S, Alcorn S, McNeill S, Russell S, Eertmans W, Genbrugge C, Meex I, Dens J, Jans F, De Deyne C, Cholkraisuwat J, Kongpolprom N, Avard B, Burns R, Patarchi A, Spina T, Tanaka H, Otani N, Ode S, Ishimatsu S, Cho J, Moon JB, Park CW, Ohk TG, Shin MC, Won MH, Dakova S, Ramsheva Z, Ramshev K, Cho J, Moon JB, Park CW, Ohk TG, Shin MC, Cho J, Moon JB, Park CW, Ohk TG, Shin MC, Marudi A, Baroni S, Gaspari A, Bertellini E, Orhun G, Senturk E, Ozcan PE, Sencer S, Ulusoy C, Tuzun E, Esen F, Tincu R, Cobilinschi C, Tomescu D, Ghiorghiu Z, Macovei R, Van Assen M, Admiraal MM, Van Putten MJ, Tjepkema-Cloostermans M, Van Rootselaar AF, Horn J, Fallenius M, Skrifvars MB, Reinikainen M, Bendel S, Raj R, Abu-Habsa M, Hymers C, Borowska A, Sivadhas H, Sahiba S, Perkins S, Rubio J, Rubio JA, Sierra R, English S, Chasse M, Turgeon A, Lauzier F, Griesdale D, Garland A, Fergusson D, Zarychanski R, Tinmouth A, Van Walraven C, Montroy K, Ziegler J, Dupont Chouinard R, Carignan R, Dhaliwal A, Lum C, Sinclair J, Pagliarello G, McIntyre L, English S, Chasse M, Turgeon A, Lauzier F, Griesdale D, Garland A, Fergusson D, Zarychanski R, Tinmouth A, Van Walraven C, Montroy K, Ziegler J, Dupont Chouinard R, Carignan R, Dhaliwal A, Lum C, Sinclair J, Pagliarello G, McIntyre L, Groza T, Moreau N, Castanares-Zapatero D, Hantson P, Carbonara M, Ortolano F, Zoerle T, Magnoni S, Pifferi S, Conte V, Stocchetti N, Carteron L, Suys T, Patet C, Quintard H, Oddo M, Rubio JA, Rubio J, Sierra R, Spatenkova V, Pokorna E, Suchomel P, Ebert N, Jancik J, Rhodes H, Bylinski T, Hawthorne C, Shaw M, Piper I, Kinsella J, Kink AK, Rätsep IR, Boutin A, Moore L, Chasse M, Zarychanski R, Lauzier F, English S, McIntyre L, Lacroix J, Griesdale D, Lessard-Bonaventure P, Turgeon AF, Boutin A, Moore L, Green R, Lessard-Bonaventure P, Erdogan M, Butler M, Lauzier F, Chasse M, English S, McIntyre L, Zarychanski R, Lacroix J, Griesdale D, Desjardins P, Fergusson DA, Turgeon AF, Goncalves B, Vidal B, Valdez C, Rodrigues AC, Miguez L, Moralez G, Hong T, Kutz A, Hausfater P, Amin D, Struja T, Haubitz S, Huber A, Mueller B, Schuetz P, Brown T, Collinson J, Pritchett C, Slade T, Le Guen M, Hellings S, Ramsaran R, Alsheikhly A, Abe T, Kanapeckaite L, Abu-Habsa M, Bahl R, Russell MQ, Real KJ, Abu-Habsa M, Lyon RM, Oveland NP, Penketh J, Mcdonald M, Kelly F, Alfafi M, Alsolamy S, Almutairi W, Alotaibi B, Van den Berg AE, Schriel Y, Dawson L, Meynaar IA, Talaie H, Silva D, Fernandes S, Gouveia J, Santos Silva J, Foley J, Kaskovagheorgescu A, Evoy D, Cronin J, Ryan J, Huck M, Hoffmann C, Renner J, Laitselart P, Donat N, Cirodde A, Schaal JV, Masson Y, Nau A, Leclerc T, Howarth O, Davenport K, Jeanrenaud P, Raftery S, MacTavish P, Devine H, McPeake J, Daniel M, Kinsella J, Quasim T, Alrabiee S, Alrashid A, Alsolamy S, Gundogan O, Bor C, Akýn Korhan E, Demirag K, Uyar M, Frame F, Ashton C, Bergstrom Niska L, Dilokpattanamongkol P, Suansanae T, Suthisisang C, Morakul S, Karnjanarachata C, Tangsujaritvijit V, Mahmood S, Al Thani H, Almenyar A, Vakalos A, Avramidis V, Sharvill R, Penketh J, Morton SE, Chiew YS, Pretty C, Chase JG, Shaw GM, Knafelj R, Kordis P, Patel S, Grover V, Kuchyn I, Bielka K, Aidoni Z, Grosomanidis V, Kotzampassi K, Stavrou G, Fyntanidou B, Patsatzakis S, Skourtis C, Lee SD, Williams K, Weltes ID, Berhane S, Arrowsmith C, Peters C, Robert S, Caldas J, Panerai RB, Robinson TG, Camara L, Ferreira G, Borg-Seng-Shu E, De Lima Oliveira M, Mian NC, Santos L, Nogueira R, Zeferino SP, Jacobsen Teixeira M, Galas F, Hajjar LA, Killeen P, McPhail M, Bernal W, Maggs J, Wendon J, Hughes T, Taniguchi LU, Siqueira EM, Vieira Jr JM, Azevedo LC, Ahmad AN, Abu-Habsa M, Bahl R, Helme E, Hadfield S, Loveridge R, Shak J, Senver C, Howard-Griffin R, Wacharasint P, Fuengfoo P, Sukcharoen N, Rangsin R, Sbiti-Rohr D, Schuetz P, Na H, Song S, Lee S, Jeong E, Lee K, Cooper M, Milinis K, Williams G, McCarron E, Simants S, Patanwala I, Welters ID, Zoumpelouli E, Volakli EA, Chrysohoidou V, Georgiou S, Charisopoulou K, Kotzapanagiotou E, Panagiotidou V, Manavidou K, Stathi Z, Sdougka M, Salahuddin N, AlGhamdi B, Marashly Q, Zaza K, Sharshir M, Khurshid M, Ali Z, Malgapo M, Jamil M, Shafquat A, Shoukri M, Hijazi M, Abe T, Uchino S, Takinami M, Rangel Neto NR, Oliveira S, Reis FQ, Rocha FA, Moralez G, Ebecken K, Rabello LS, Lima MF, Hatum R, De Marco FV, Alves A, Pinto JE, Godoy M, Brasil PE, Bozza FA, Salluh JI, Soares M, Krinsley J, Kang G, Perry J, Hines H, Wilkinson KM, Tordoff C, Sloan B, Bellamy MC, Moreira E, Verga F, Barbato M, Burghi G, Soares M, Silva UV, Azevedo LC, Torelly AP, Kahn JM, Angus DC, Knibel MF, Brasil PE, Bozza FA, Salluh JI, Velasco MB, Dalcomune DM, Marshall R, Gilpin T, Tridente A, Raithatha A, Mota D, Loureiro B, Dias J, Afonso O, Coelho F, Martins A, Faria F, Al-Dorzi H, Al Orainni H, AlEid F, Tlaygeh H, Itani A, Hejazi A, Arabi Y, Gaudry S, Messika J, Ricard JD, Guillo S, Pasquet B, Dubief E, Dreyfuss D, Tubach F, Battle C, James K, Temblett P, Davies L, Battle C, Lynch C, Pereira S, Cavaco S, Fernandes J, Moreira I, Almeida E, Seabra Pereira F, Malheiro M, Cardoso F, Aragão I, Cardoso T, Fister M, Knafelj R, Muraray Govind P, Brahmananda Reddy N, Pratheema R, Arul ED, Devachandran J, Velasco MB, Dalcomune DM, Knafelj R, Fister M, Chin-Yee N, D’Egidio G, Thavorn K, Heyland D, Kyeremanteng K, Murchison AG, Swalwell K, Mandeville J, Stott D, Guerreiro I, Devine H, MacTavish P, McPeake J, Quasim T, Kinsella J, Daniel M, Goossens C, Marques MB, Derde S, Vander Perre S, Dufour T, Thiessen SE, Güiza F, Janssens T, Hermans G, Vanhorebeek I, De Bock K, Van den Berghe G, Langouche L, Devine H, MacTavish P, Quasim T, Kinsella J, Daniel M, McPeake J, Miles B, Madden S, Devine H, Weiler M, Marques P, Rodrigues C, Boeira M, Brenner K, Leães C, Machado A, Townsend R, Andrade J, MacTavish P, McPeake J, Devine H, Kinsella J, Daniel M, Kishore R, Fenlon C, Quasim T, Fiks T, Ruijter A, Te Raa M, Spronk P, Chiew YS, Docherty P, Dickson J, Moltchanova E, Scarrot C, Pretty C, Shaw GM, Chase JG, Hall T, Ngu WC, Jack JM, Morgan P, Avard B, Pavli A, Gee X, Bor C, Akin Korhan E, Demirag K, Uyar M, Shirazy M, Fayed A, Gupta S, Kaushal A, Dewan S, Varma A, Ghosh E, Yang L, Eshelman L, Lord B, Carlson E, Helme E, Broderick R, Hadfield S, Loveridge R, Ramos J, Forte D, Yang F, Hou P, Dudziak J, Feeney J, Wilkinson K, Bauchmuller K, Shuker K, Faulds M, Raithatha A, Bryden D, England L, Bolton N, Tridente A, Bauchmuller K, Shuker K, Tridente A, Faulds M, Matheson A, Gaynor J, Bryden D, ᅟ SSYHRC, Ramos J, Peroni B, Daglius-Dias R, Miranda L, Cohen C, Carvalho C, Velasco I, Forte D, Kelly JM, Neill A, Rubenfeld G, Masson N, Min A, Boezeman E, Hofhuis J, Hovingh A, De Vries R, Spronk P, Cabral-Campello G, Aragão I, Cardoso T, Van Mol M, Nijkamp M, Kompanje E, Ostrowski P, Omar A, Kiss K, Köves B, Csernus V, Molnár Z, Hoydonckx Y, Vanwing S, Stessel B, Van Assche A, Jamaer L, Dubois J, Medo V, Galvez R, Miranda JP, Stone C, Wigmore T, Arunan Y, Wheeler A, Bauchmuller K, Bryden D, Wong Y, Poi C, Gu C, Molmy P, Van Grunderbeeck N, Nigeon O, Lemyze M, Thevenin D, Mallat J, Ramos J, Correa M, Carvalho RT, Forte D, Fernandez A, McBride C, Koonthalloor E, Walsh C, Webber A, Ashe M, Smith K, Jeanrenaud P, Marudi A, Baroni S, Ragusa F, Bertellini E, Volakli EA, Chochliourou E, Dimitriadou M, Violaki A, Mantzafleri P, Samkinidou E, Vrani O, Arbouti A, Varsami T, Sdougka M, Bollen JA, Van Smaalen TC, De Jongh WC, Ten Hoopen MM, Ysebaert D, Van Heurn LW, Van Mook WN, Sim K, Fuller A, Roze des Ordons A, Couillard P, Doig C, Van Keer RV, Deschepper RD, Francke AF, Huyghens LH, Bilsen JB, Nyamaizi B, Dalrymple C, Molokhia A, Dobru A, Marrinan E, Ankuli A, Molokhia A, McPeake J, Struthers R, Crawford R, Devine H, Mactavish P, Quasim T, Morelli P, Degiovanangelo M, Lemos F, MArtinez V, Verga F, Cabrera J, Burghi G, Rutten A, Van Ieperen S, De Geer S, Van Vugt M, Der Kinderen E, Giannini A, Miccinesi G, Marchesi T, Prandi E. Erratum to: 36th International Symposium on Intensive Care and Emergency Medicine: Brussels, Belgium. 15-18 March 2016

[This corrects the article DOI: 10.1186/s13054-016-1208-6.].

A multiple index integrating different levels of organization

Many methods in freshwater biomonitoring tend to be restricted to a few levels of biological organization, limiting the potential spectrum of measurable of cause-effect responses to different anthropogenic impacts. We combined distinct organisational levels, covering biological biomarkers (histopathological and biochemical reactions in liver and fish gills), community based bioindicators (fish guilds, invertebrate metrics/traits and chironomid pupal exuviae) and ecosystem functional indicators (decomposition rates) to assess ecological status at designated Water Framework Directive monitoring sites, covering a gradient of human impact across several rivers in northern Portugal. We used Random Forest to rank the variables that contributed more significantly to successfully predict the different classes of ecological status and also to provide specific cut levels to discriminate each WFD class based on reference condition. A total of 59 Biological Quality Elements and functional indicators were determined using this procedure and subsequently applied to develop the integrated Multiple Ecological Level Index (MELI Index), a potentially powerful bioassessment tool.

Microstructural, mechanical, and histological evaluation of modified alginate-based scaffolds

Scaffolds are three-dimensional structures used for tissue regeneration being the base in tissue engineering. These scaffolds are obtained from natural and/or synthetic polymers and they should satisfy some specific requirements such as biocompatibility, suitable mechanical, and microstructural properties to favor cellular adhesion and neovascularization. This work shows a preclinic study about the production of low and medium molecular weight alginate through the use of calcium salts (calcium glutamate). The results showed prove that better structures, distribution, and pore sizes as well as better mechanical properties correspond to medium molecular weight alginate and higher calcium salts concentration. This type of scaffold, after muscular cells cultivation, has been proved as an excellent material for muscle growth. The histopathological analysis shows a low inflammatory response, without a foreign body reaction, suitable neovascularization and good fibroblasts incorporation. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 3107-3114, 2016.

IRAK1 variant is protective for orthodontic-induced external apical root resorption

OBJECTIVE

Interleukin-1 beta (IL1B) pathway is a key player in orthodontic-induced external apical root resorption (EARR). The aim of this work was to identify the genes related to the IL1 pathway as possible candidate genes for EARR, which might be included in an integrative predictive model of this complex phenotype.

MATERIALS AND METHODS

Using a stepwise multiple linear regression model, 195 patients who had undergone orthodontic treatment were assessed for clinical and genetic factors associated with %EARRmax (maximum %EARR value obtained for each patient). The four maxillary incisors and the two maxillary canines were assessed. Three functional single nucleotide polymorphisms (SNPs) were genotyped: rs1143634 in IL1B gene, rs315952 in IL1RN gene, and rs1059703 in X-linked IRAK1 gene.

RESULTS

The model showed that four of the nine clinical variables and one SNP explained 30% of the %EARRmax variability. The most significant unique contributions to the model were gender (P = 0.001), treatment duration (P < 0.001), premolar extractions (P = 0.003), Hyrax appliance (P < 0.001), and homozygosity/hemizygosity for variant C from IRAK1 gene (P = 0.018), which proved to be a protective factor.

CONCLUSION

IRAK1 polymorphism is proposed as a protective variant for EARR.

Recommendations for aetiological diagnosis of bronchiectasis

The number of bronchiectasis diagnoses has increased in the last two decades due to several factors. Research carried out over the last years showed that an aetiological diagnosis could change the approach and treatment of a relevant percentage of patients and consequently the prognosis. Currently, systematic investigation into aetiology, particularly of those disorders that can be subject to specific treatment, is recommended. Given the complexity of the aetiological diagnosis, the Pulmonology Portuguese Society Bronchiectasis Study Group assembled a working group which prepared a document to guide and standardize the aetiologic investigation based on available literature and its own expertise. The goal is to facilitate the investigation, rationalize resources and improve the delivery of care, quality of life and prognosis of patients with bronchiectasis.

Mortality Patterns of Hydro-Geomorphologic Disasters

Social impacts caused by floods and landslides in Portugal in the period of 1865-2010 are gathered in the DISASTER database. This database contains 1,902 hydro-geomorphologic cases that caused 1,248 fatalities (81% and 19% associated with floods and landslides, respectively). The use of the DISASTER database allowed for: (i) the analysis of the frequency and the temporal evolution of fatal floods and landslides; (ii) the analysis of the spatio-temporal distribution of fatalities; (iii) the identification of the most deadly flood and landside types; (iv) the verification of gender tendencies in mortalities; and (v) the evaluation of individual and societal risk. The highest number of flood and landslide cases and related mortalities occurred in the period of 1935-1969. After this period, the number of flood and landslide mortalities decreased, although landslide fatalities remained higher than those registered in the period of 1865-1934. The occurrence of flood fatalities was widespread in the country, with an important cluster in the Lisbon region and in the Tagus valley, while fatalities caused by landslides mainly occurred in the north of the Tagus valley. Flash floods caused the majority of fatalities associated with floods, while falls and flows were responsible for the highest number of fatalities associated with landslides. Males were found to have the highest frequency of fatalities. In the case of floods, the majority of fatalities were found both outdoors and inside of buildings in rural areas while fatalities inside buildings were dominant in landslide cases, mostly in rural areas.

Correlates of children's compliance with moderate-to-vigorous physical activity recommendations: a multilevel analysis

This study aimed to investigate the association between individual and school characteristics associated with the number of school days children comply with moderate-to-vigorous physical activity (MVPA) recommendations. Sample comprises 612 Portuguese children, aged 9-11 years, from 23 schools. Time spent in MVPA was measured by accelerometry, while individual-level correlates were obtained by anthropometry and questionnaires. School-level variables were collected by questionnaire, and accelerometer wear time and season were also considered. Maximum likelihood estimates of model parameters were obtained via a multilevel analysis with children as level-1, and school as level-2. Children who spent more time in sedentary activities and girls were less likely to comply with MVPA/daily. More mature children and those who use active transportation to school were more likely to attain the PA recommendation. Furthermore, greater accelerometer wear time and spring season increased the chance to achieve the recommended MVPA. In terms of school-level correlates, a greater number of available facilities was negatively associated with children MVPA compliance. Given the set of variables, our results showed that individual characteristics seem to be more relevant for children's compliance rates with PA/day than school context variables, which should be taken into account in the implementation of school policies and practices.

When one port does not return blood: two case reports of rare causes for misplaced central venous catheters

We present two cases of misplaced central venous catheters having in common the absence of free blood return from one lumen immediately after placement. The former is a case of right hydrothorax associated with central venous catheterization with the catheter tip in intra-pleural location. In this case the distal port was never patent. In the latter case there was an increased aspiration pressure through the middle port due to a catheter looping. The absence of free flow on aspiration from one lumen of a central catheter should not be undervalued. In these circumstances the catheter should not be used and needs to be removed.

An integrated approach for assessing the bioreceptivity of glazed tiles to phototrophic microorganisms

A laboratory-based methodology was designed to assess the bioreceptivity of glazed tiles. The experimental set-up consisted of multiple steps: manufacturing of pristine and artificially aged glazed tiles, enrichment of phototrophic microorganisms, inoculation of phototrophs on glazed tiles, incubation under optimal conditions and quantification of biomass. In addition, tile intrinsic properties were assessed to determine which material properties contributed to tile bioreceptivity. Biofilm growth and biomass were appraised by digital image analysis, colorimetry and chlorophyll a analysis. SEM, micro-Raman and micro-particle induced X-ray emission analyses were carried out to investigate the biodeteriorating potential of phototrophic microorganisms on the glazed tiles. This practical and multidisciplinary approach showed that the accelerated colonization conditions allowed different types of tile bioreceptivity to be distinguished and to be related to precise characteristics of the material. Aged tiles showed higher bioreceptivity than pristine tiles due to their higher capillarity and permeability. Moreover, biophysical deterioration caused by chasmoendolithic growth was observed on colonized tile surfaces.

External gamma irradiation-induced effects in early-life stages of zebrafish, Danio rerio

In the general context of validation of tools useful for the characterization of ecological risk linked to ionizing radiation, the effects of an external gamma irradiation were studied in zebrafish larvae irradiated for 96 h with two dose rates: 0.8 mGy/d, which is close to the level recommended to protect ecosystems from adverse effects of ionizing radiation (0.24 mGy/d) and a higher dose rate of 570 mGy/d. Several endpoints were investigated, such as mortality, hatching, and some parameters of embryo-larval development, immunotoxicity, apoptosis, genotoxicity, neurotoxicity and histological alterations. Results showed that an exposure to gamma rays induced an acceleration of hatching for both doses and a decrease of yolk bag diameter for the highest dose, which could indicate an increase of global metabolism. AChE activity decreased with the low dose rate of gamma irradiation and alterations were also shown in muscles of irradiated larvae. These results suggest that gamma irradiation can induce damages on larval neurotransmission, which could have repercussions on locomotion. DNA damages, basal ROS production and apoptosis were also induced by irradiation, while ROS stimulation index and EROD biotransformation activity were decreased and gene expression of acetylcholinesterase, choline acetyltransferase, cytochrome p450 and myeloperoxidase increased. These results showed that ionizing radiation induced an oxidative stress conducting to DNA damages. This study characterized further the modes of action of ionizing radiation in fish.

A middleware for intelligent environments in ambient assisted living

The increasing elderly population is changing the demography of many countries, becoming a major issue for society. As a direct consequence of this demographic phenomenon, allied to technological developments and pressure to reduce healthcare costs, new healthcare technologies for proactive health and elder care is needed. However, interoperability issues among different levels of available technologies restricts a wider deployment among intermediate and end-users. This work presents a service-oriented middleware that was developed to provide access to the functionality offered by virtually any existing device, or application, in a residential setting, in a transparent and intuitive form. The proposed middleware abstracts the communication technologies involved, allowing to seemingly integrate different communication protocols, making possible the distributed cooperation of devices that were built as stand-alone products. As a test case, an application was built with the middleware to monitor blood pressure and electromyography signal using typical health devices.

Potential of phage cocktails in the inactivation of Enterobacter cloacae--An in vitro study in a buffer solution and in urine samples

The objective of this study was to compare the dynamics of three previously isolated phages for Enterobacter cloacae in order to evaluate their ability to treat urinary tract infections (UTI). The phages genomes, survival, host range, were characterized, and the host-phage dynamics was determined in culture medium and urine samples. The presence of prophages in bacteria, host recovery and development of resistance to phage after treatment was also evaluated. The growth of the E. cloacae was inhibited by the three phages, resulting in a decrease of ≈3 log. The use of cocktails with two or three phages was significantly more effective (decrease of ≈4 log). In urine, the inactivation was still effective (≈2 log). Both phages were considered safe to inactivate the bacteria (no integrase and toxin codifying genes). Some bacteria remained viable in the presence of the phages, but their colonies were smaller than those of the non-treated control and were visible only after 5 days of incubation (visible after 24h in the control). A high bacterial inactivation efficiency with phage cocktails combined with the safety of the phages and their long periods of survival, even in urine samples, paves the way for depth studies, especially in vivo studies, to control urinary tract infection and to overcome the development of resistances by the nosocomial bacterium E. cloacae.

Combined effects of depleted uranium and ionising radiation on zebrafish embryos

In the environment, living organisms are exposed to a mixture of stressors, and the combined effects are deemed as multiple stressor effects. In the present work, the authors studied the multiple stressor effect in embryos of the zebrafish (Danio rerio) from simultaneous exposure to alpha particles and depleted uranium (DU) through quantification of apoptotic signals at 24 h post-fertilisation (hpf) revealed by vital dye acridine orange staining. In each set of experiments, dechorionated zebrafish embryos were divided into 4 groups, each having 10 embryos: Group (C) in which the embryos did not receive any further treatment; Group (IU) in which the embryos received an alpha-particle dose of 0.44 mGy at 5 hpf and were then exposed to 100 µg l(-1) of DU from 5 to 6 hpf; Group (I) in which the embryos received an alpha-particle dose of 0.44 mGy at 5 hpf and Group (U) in which the dechorionated embryos were exposed to 100 µg l(-1) of DU from 5 to 6 hpf. The authors confirmed that an alpha-particle dose of 0.44 mGy and a DU exposure for 1 h separately led to hormetic and toxic effects assessed by counting apoptotic signals, respectively, in the zebrafish. Interestingly, the combined exposure led to an effect more toxic than that caused by the DU exposure alone, so effectively DU changed the beneficial effect (hormesis) brought about by alpha-particle irradiation into an apparently toxic effect. This could be explained in terms of the promotion of early death of cells predisposed to spontaneous transformation by the small alpha-particle dose (i.e. hormetic effect) and the postponement of cell death upon DU exposure.

An Experimental Study on the Use of Calcium Alginate to Heal Colonic Anastomoses

BACKGROUND

Anastomotic leak is considered the major complication following abdominal surgery. In recent years, the use of a variety of sealing materials for the prevention of leaks has been analyzed. Different biomaterials have been employed as scaffolds to favour tissue repair and regeneration. Among these materials we must mention alginate, a natural polymer with different applications as temporary supporting matrix. The aim of the present study is to evaluate the behavior of both alginate-impregnated sutures and lyophilized alginate sponges in the healing process of colonic anastomes using an experimental animal model.

MATERIAL AND METHODS

A preliminary study was undertaken to select the adequate scaffold. Animals (n = 45) were distributed into three groups: control (colonic anastomosis using non-continuous 5-0 Polyglactin 910 suture), suture (colonic anastomosis using suture impregnated with alginate gel at 4%) and sponge (colonic anastomosis using suture reinforced with lyophilized alginate sponge). The macroscopic and histological variables were assessed at 4, 8 and 12 days after surgical intervention.

RESULTS

No statistically significant differences have been observed between the groups during the analysis of macroscopic variables. Animals with sponge implantation showed a greater degree of epithelial reepithalization, less acute and chronic inflammation and greater collagen deposit.

CONCLUSIONS

The use of lyophilized alginate sponges to reinforce colonic anastomoses in an animal model reduces inflammation and promotes the earlier formation of greater collagen deposits without increasing the number of adhesions or the incidence of stenosis.

Physicochemical and biological characterization of chitosan-microRNA nanocomplexes for gene delivery to MCF-7 breast cancer cells

Cancer gene therapy requires the design of non-viral vectors that carry genetic material and selectively deliver it with minimal toxicity. Non-viral vectors based on cationic natural polymers can form electrostatic complexes with negatively-charged polynucleotides such as microRNAs (miRNAs). Here we investigated the physicochemical/biophysical properties of chitosan-hsa-miRNA-145 (CS-miRNA) nanocomplexes and the biological responses of MCF-7 breast cancer cells cultured in vitro. Self-assembled CS-miRNA nanocomplexes were produced with a range of (+/-) charge ratios (from 0.6 to 8) using chitosans with various degrees of acetylation and molecular weight. The Z-average particle diameter of the complexes was <200 nm. The surface charge increased with increasing amount of chitosan. We observed that chitosan induces the base-stacking of miRNA in a concentration dependent manner. Surface plasmon resonance spectroscopy shows that complexes formed by low degree of acetylation chitosans are highly stable, regardless of the molecular weight. We found no evidence that these complexes were cytotoxic towards MCF-7 cells. Furthermore, CS-miRNA nanocomplexes with degree of acetylation 12% and 29% were biologically active, showing successful downregulation of target mRNA expression in MCF-7 cells. Our data, therefore, shows that CS-miRNA complexes offer a promising non-viral platform for breast cancer gene therapy.

Regulation of cell death receptor S-nitrosylation and apoptotic signaling by Sorafenib in hepatoblastoma cells

Nitric oxide (NO) plays a relevant role during cell death regulation in tumor cells. The overexpression of nitric oxide synthase type III (NOS-3) induces oxidative and nitrosative stress, p53 and cell death receptor expression and apoptosis in hepatoblastoma cells. S-nitrosylation of cell death receptor modulates apoptosis. Sorafenib is the unique recommended molecular-targeted drug for the treatment of patients with advanced hepatocellular carcinoma. The present study was addressed to elucidate the potential role of NO during Sorafenib-induced cell death in HepG2 cells. We determined the intra- and extracellular NO concentration, cell death receptor expression and their S-nitrosylation modifications, and apoptotic signaling in Sorafenib-treated HepG2 cells. The effect of NO donors on above parameters has also been determined. Sorafenib induced apoptosis in HepG2 cells. However, low concentration of the drug (10nM) increased cell death receptor expression, as well as caspase-8 and -9 activation, but without activation of downstream apoptotic markers. In contrast, Sorafenib (10 µM) reduced upstream apoptotic parameters but increased caspase-3 activation and DNA fragmentation in HepG2 cells. The shift of cell death signaling pathway was associated with a reduction of S-nitrosylation of cell death receptors in Sorafenib-treated cells. The administration of NO donors increased S-nitrosylation of cell death receptors and overall induction of cell death markers in control and Sorafenib-treated cells. In conclusion, Sorafenib induced alteration of cell death receptor S-nitrosylation status which may have a relevant repercussion on cell death signaling in hepatoblastoma cells.

Resveratrol prevents insulin resistance caused by short-term elevation of free fatty acids in vivo

Elevated levels of plasma free fatty acids (FFA), which are commonly found in obesity, induce insulin resistance. FFA activate protein kinases including the proinflammatory IκBα kinase β (IKKβ), leading to serine phosphorylation of insulin receptor substrate 1 (IRS-1) and impaired insulin signaling. To test whether resveratrol, a polyphenol found in red wine, prevents FFA-induced insulin resistance, we used a hyperinsulinemic-euglycemic clamp with a tracer to assess hepatic and peripheral insulin sensitivity in overnight-fasted Wistar rats infused for 7 h with saline, Intralipid plus 20 U·mL(-1) heparin (IH; triglyceride emulsion that elevates FFA levels in vivo; 5.5 μL·min(-1)) with or without resveratrol (3 mg·kg(-1)·h(-1)), or resveratrol alone. Infusion of IH significantly decreased glucose infusion rate (GIR; P < 0.05) and peripheral glucose utilization (P < 0.05) and increased endogenous glucose production (EGP; P < 0.05) during the clamp compared with saline infusion. Resveratrol co-infusion, however, completely prevented the effects induced by IH infusion: it prevented the decreases in GIR (P < 0.05 vs. IH), peripheral glucose utilization (P < 0.05 vs. IH), and insulin-induced suppression of EGP (P < 0.05 vs. IH). Resveratrol alone had no effect. Furthermore, IH infusion increased serine (307) phosphorylation of IRS-1 in soleus muscle (∼30-fold, P < 0.001), decreased total IRS-1 levels, and decreased IκBα content, consistent with activation of IKKβ. Importantly, all of these effects were abolished by resveratrol (P < 0.05 vs. IH). These results suggest that resveratrol prevents FFA-induced hepatic and peripheral insulin resistance and, therefore, may help mitigate the health consequences of obesity.

Effect of N-acetyl-l-cysteine on insulin resistance caused by prolonged free fatty acid elevation

Circulating free fatty acids (FFAs) are elevated in obesity and cause insulin resistance. The objective of the current study was to determine whether the antioxidant N-acetyl-l-cysteine (NAC) prevented hepatic and peripheral insulin resistance caused by prolonged elevation of plasma FFAs. Chronically cannulated Wistar rats received saline (SAL), Intralipid plus heparin (IH), IH plus NAC, or NAC i.v. infusion for 48 h. Insulin sensitivity was determined using the hyperinsulinemic-euglycemic clamp with tritiated glucose tracer. IH induced hepatic and peripheral insulin resistance (P<0.05). NAC co-infusion did not prevent insulin resistance in the liver, although it was able to prevent peripheral insulin resistance. Prolonged IH infusion did not appear to induce oxidative stress in the liver because hepatic content of protein carbonyl, malondialdehyde, and reduced to oxidized glutathione ratio did not differ across treatment groups. In alignment with our insulin sensitivity results, IH augmented skeletal muscle protein carbonyl content and this was prevented by NAC co-infusion. Taken together, our results indicate that oxidative stress mediates peripheral, but not hepatic, insulin resistance resulting from prolonged plasma FFA elevation. Thus, in states of chronic plasma FFA elevation, such as obesity, antioxidants may protect against peripheral but not hepatic insulin resistance.

In vivo effects of polyunsaturated, monounsaturated, and saturated fatty acids on hepatic and peripheral insulin sensitivity

OBJECTIVE

Free fatty acids (FFAs) cause insulin resistance and are often elevated in obesity. Chronic ingestion of diets rich in saturated fat induces more insulin resistance than diets rich in unsaturated fat, however, it remains unclear whether different FFAs cause distinct levels of insulin resistance in the short-term, which is relevant to the feeding and fasting cycle. Protein kinase C (PKC)-δ is implicated in hepatic insulin resistance. Therefore, we investigated the effects of short-term elevation of fatty acids with different degrees of unsaturation on hepatic insulin action and liver PKC-δ membrane translocation, a marker of activation.

MATERIALS/METHODS

Triglyceride emulsions of Soybean Oil+Heparin (polyunsaturated (POLY)), Olive Oil+Heparin (monounsaturated (MONO)), Lard Oil+Heparin (saturated (SATU)), or saline (SAL) were infused intravenously for 7h to elevate plasma FFA concentrations ~3-4 fold in rats. During the last 2h of infusion, a hyperinsulinemic-euglycemic clamp with tritiated glucose methodology was performed to examine hepatic and peripheral insulin sensitivity.

RESULTS

Surprisingly, SATU, MONO, and POLY impaired peripheral insulin sensitivity (glucose utilization divided by insulin) to a similar extent. Furthermore, all lipids induced a similar degree of hepatic insulin resistance compared to SAL. Although there were changes in hepatic content of lipid metabolites, there were no significant differences in liver PKC-δ membrane translocation across fat groups.

CONCLUSIONS

In summary, in the short-term, FFAs with different degrees of unsaturation impair peripheral insulin sensitivity and induce hepatic insulin resistance as well as hepatic PKC-δ translocation to the same extent.

Successful induction of labor: prediction by preinduction cervical length, angle of progression and cervical elastography

OBJECTIVE

To examine the potential value of preinduction cervical length, cervical elastography and angle of progression (AOP) in prediction of successful vaginal delivery and induction-to-delivery interval.

METHODS

This was a prospective study in 99 women with singleton pregnancy undergoing preinduction ultrasound assessment at 35-42 weeks' gestation. Cervical length, elastographic score at the internal os and AOP were determined. Regression analysis was used to assess the relationship between cervical length and both AOP and elastographic score. Logistic regression analysis was used to determine which of the maternal characteristics (cervical length, AOP, elastographic score) were significant predictors of vaginal delivery and induction-to-delivery interval.

RESULTS

Vaginal delivery occurred in 66 (66.7%) cases and Cesarean delivery was performed in 33 (33.3%) cases. There were significant correlations between cervical length and both AOP (r = - 0.319) and elastographic score (r = 0.368). Significant independent prediction of vaginal delivery and induction-to-delivery interval was provided by nulliparity and cervical length, with no additional significant contribution from electrographic score or AOP.

CONCLUSIONS

In women undergoing induction of labor, AOP and elastographic score at the internal os are unlikely to be useful in prediction of vaginal delivery and induction-to-delivery interval.

Wastewater and greywater reuse on irrigation in centralized and decentralized systems--an integrated approach on water quality, energy consumption and CO2 emissions

Wastewater and greywater have different scales of end-uses in irrigation in Portugal. Wastewater is treated in a central wastewater treatment plant and reused in public/private large areas of irrigation, like agriculture, public gardens and golf courses. On the contrary, greywater reuse is generally applied in in situ small scales, treated and used in the same place, generally in the production site. The main aim of this paper is to compare the two types of systems: a wastewater centralized reuse system (WWCRS) and a greywater decentralized reuse system (GWDRS) in terms of water quality, energy consumption and CO2 emissions. In this paper, the main characteristics of both streams are presented and the degree of treatment required in each stream is analyzed. The advantages and disadvantages of its reuse in different scales, in terms of water quality, energy consumption and CO2 emissions are discussed. A methodology to calculate the energy consumptions and CO2 emissions related to wastewater treatment that may be applied in different cases is presented. A hypothetical example of the two systems: one referring to a WWCRS and the other to a GWDRS is presented. The energy consumption and the CO2 emissions are analyzed and compared. The WWCRS needs a higher degree of treatment and so it spends more energy and leads to more CO2 emissions to the environment than the GWDRS that consumed between 11.8 and 37.5% of the energy consumed in the WWCRS considering the same number of inhabitants served.

FFA-induced hepatic insulin resistance in vivo is mediated by PKCδ, NADPH oxidase, and oxidative stress

Fat-induced hepatic insulin resistance plays a key role in the pathogenesis of type 2 diabetes in obese individuals. Although PKC and inflammatory pathways have been implicated in fat-induced hepatic insulin resistance, the sequence of events leading to impaired insulin signaling is unknown. We used Wistar rats to investigate whether PKCδ and oxidative stress play causal roles in this process and whether this occurs via IKKβ- and JNK-dependent pathways. Rats received a 7-h infusion of Intralipid plus heparin (IH) to elevate circulating free fatty acids (FFA). During the last 2 h of the infusion, a hyperinsulinemic-euglycemic clamp with tracer was performed to assess hepatic and peripheral insulin sensitivity. An antioxidant, N-acetyl-L-cysteine (NAC), prevented IH-induced hepatic insulin resistance in parallel with prevention of decreased IκBα content, increased JNK phosphorylation (markers of IKKβ and JNK activation, respectively), increased serine phosphorylation of IRS-1 and IRS-2, and impaired insulin signaling in the liver without affecting IH-induced hepatic PKCδ activation. Furthermore, an antisense oligonucleotide against PKCδ prevented IH-induced phosphorylation of p47(phox) (marker of NADPH oxidase activation) and hepatic insulin resistance. Apocynin, an NADPH oxidase inhibitor, prevented IH-induced hepatic and peripheral insulin resistance similarly to NAC. These results demonstrate that PKCδ, NADPH oxidase, and oxidative stress play a causal role in FFA-induced hepatic insulin resistance in vivo and suggest that the pathway of FFA-induced hepatic insulin resistance is FFA → PKCδ → NADPH oxidase and oxidative stress → IKKβ/JNK → impaired hepatic insulin signaling.