119 research outputs found

    Relationship between Resilience and Self-regulation: A Study of Spanish Youth at Risk of Social Exclusion

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    The Supplementary Material for this article can be found online at: http://journal.frontiersin.org/article/10.3389/fpsyg.2017.00612/full#supplementary-materialThe ability to self-regulate behavior is one of the most important protective factors in relation with resilience and should be fostered especially in at-risk youth. Previous research has characterized these students as having behaviors indicating lack of foresight. The aim of the present study was to test the hypothetical relationship between these personal variables. It was hypothesized that self-regulation would be associated with and would be a good predictor of resilience, and that low-medium-high levels of self-regulation would lead to similar levels of resilience. The participants were 365 students -aged 15 and 21- from Navarre (Spain) who were enrolled in Initial Vocational Qualification Programs (IVQP). For the assessment, the Connor Davidson Resilience Scale (CD-RISC) and the Short Self-Regulation Questionnaire (SSRQ) were applied. We carried out linear association analyses (correlational and structural) and non-linear interdependence analyses (MANOVA) between the two constructs. Relationships between them were significant and positive. Learning from mistakes (self-regulation) was a significant predictor of coping and confidence, tenacity and adaptation, and tolerance to negative situations (resilience). Likewise, low-medium-high levels of self-regulation correlated with scores on resilience factors. Implications of these results for educational practice and for future research are discussed.Motivational-affective strategies of personal self-regulation and coping with stress in the university teaching-learning process. Ref. EDU2011-24805 (2012-2015). Ministry of Economy and Competitiveness (Spain) and FEDER Found (EU)

    Reproductive Diseases in Farmed Rabbit Does

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    [EN] In this study, we determined the occurrence of reproductive diseases in does on 1373 visited farms in Spain and Portugal, between 1994 and 2019. The retrospective information obtained was entered in a database classified as follows: apparent infertility (≀70% pregnancy rate), abortions (≄2% of serviced does), high fetal death risk at parturition (≄10%) or dystocia, amongst others. Infertility was the reason for 181 visits. The median of prevalence of apparent infertility in these cases was 35% (minimum to maximum: 25-90%) and the mean, 37.4%. We performed a prospective study to determine risk factors at the individual and farm level, with a second database corresponding to 2014-2019. We carried out pregnancy checks, assessed sanitary status and body condition, and recorded the age of 17, 297 rebred lactating does on 142 farms. The median size of the farms was 800 does, and the examined cohorts, 350 does. Predisposing risk factors for infertility were observed: e.g., mastitis had an effect. During the 5-year study, we made a third database with the results from 190, 508 does palpated by producers in a subset of 134 farms. In this case, the median of the prevalence of apparent infertility was 14.5% (minimum to maximum: 4.1-50%), which could be considered baseline occurrence when monitoring the theriogenology of rabbit doe farms. Reproductive rhythm was an enabling risk factor: does serviced ≀25 d postpartum were less fertile than at ≄32 d. We made a database with the body condition score (BCS) on a linear scale from 1 (emaciated) to 9 (obese). The pregnancy rate (PR) of underweight and borderline does (4/9) was 73.1%. The PR of overweight and borderline does (6/9) was 82.6% and those classified with a mean BCS (5/9): PR = 79.3%. We may infer that the optimum BCS for reproduction is 6/9, rather than 5/9. Some changes in female rabbit health and husbandry to improve reproductive performance and welfare are highlightedSIThis research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sector

    Gold-nanoparticles coated with the antimicrobial peptide esculentin-1a(1-21)NH2 as a reliable strategy for antipseudomonal drugs

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    Naturally occurring antimicrobial peptides (AMPs) hold promise as future therapeutics against multidrug resistant microorganisms. Recently, we have discovered that a derivative of the frog skin AMP esculentin-1a, Esc(1-21), is highly potent against both free living and biofilm forms of the bacterial pathogen Pseudomonas aeruginosa. However, bringing AMPs into clinics requires to overcome their low stability, high toxicity and inefficient delivery to the target site at high concentrations. Importantly, peptide conjugation to gold nanoparticles (AuNPs), which are among the most applied inorganic nanocarriers in biomedical sciences, represents a valuable strategy to solve these problems. Here we report that covalent conjugation of Esc(1-21) to soluble AuNPs AuNPs@Esc(1-21)] via a poly(ethylene glycol) linker increased by ~15-fold the activity of the free peptide against the motile and sessile forms of P. aeruginosa without being toxic to human keratinocytes. Furthermore, AuNPs@Esc(1-21) resulted to be significantly more resistant to proteolytic digestion and to disintegrate the bacterial membrane at very low concentration (5 nM). Finally, we demonstrated for the first time the capability of peptide-coated AuNPs to display a wound healing activity on a keratinocytes monolayer. Overall, these findings suggest that our engineered AuNPs can serve as attractive novel biological-derived material for topical treatment of epithelial infections and healing of the injured tissue. Statement of Significance Despite conjugation of AMPs to AuNPs represents a worthwhile solution to face some limitations for their development as new therapeutics, only a very limited number of studies is available on peptide-coated AuNPs. Importantly, this is the first report showing that a covalent binding of a linear AMP via a poly(ethylene glycol) linker to AuNPs highly enhances antipseudomonal activity, preserving the same mode of action of the free peptide, without being harmful. Furthermore, AuNPs@Esc(1-21) are expected to accelerate recovery of an injured skin layer. All together, these findings suggest our peptide-coated AuNPs as attractive novel nanoscale formulation to treat bacterial infections and to heal the injured tissue

    Determination of Methane Oxidation in Landfill Fugitive Emissions by 13C Isotope Measurements

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    Still today, the final destiny of a large part of the waste dumped is landfilling, which is an important source of methane. Quantifying the amount of methane that is oxidized when the landfill gas passes through the seal, it can provide valuable information when determining the total GHG potential emission of a landfill. In this work, methane oxidation has been determined for landfill gas samples taken on the surface of three Spanish landfills. For this, it has been determined the 13C isotopic signal in methane by cavity ring-down spectroscopy (CRDS-WS). Previously, the preference of methanotrophic bacteria for 12C isotope versus 13C has been quantified using soil samples from the three landfills. The results obtained show a great variability, ranging from 0 to 70% of methane oxidized. This variability can be explained with the specific characteristics of each sample, suggesting a consistent methodology

    Identification of Rickettsia species in ticks from ruminants in Lebanon

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    Rickettsia are tick-borne emerging pathogens recognized as important agents of human tick-borne diseases worldwide. Aim of this study was the identification and characterization of Spotted Fever Group (SFG) rickettsiae in ticks from ruminants in Lebanon. The study concerned 88 ticks collected in June 2014 from 30 Lebanese farms of ruminants and identified according morphological keys. Total DNA was extracted and used to identify and characterize Rickettsia spp. DNA through PCR and sequencing of fragments of 17 kDa protein, ompA, ompB, gltA, atpA, dnaK, dnaA, recA and 16S rRNA. Five different tick species were found: Hyalomma anatolicum (n=6), Rhipicephalus annulatus (n=56), Rhipicephalus bursa (n=1), Rhipicephalus sanguineus (n=6) and Rhipicephalus turanicus (n=19). A prevalence of 68.2% was found at the first screening performed amplyfing Rickettsia spp. 16S rRNA. Among these Rickettsia positive samples, 17 were identified at the species level and 43 as SFG rickettsiae based on the multigene genotyping strategy. ‘Candidatus Rickettsia barbariae’, an emerging member of the rickettsial SFG, was identified in 9 samples. R. massiliae, R. aeschlimannii and R. africae were identified in four, three and one tick, respectively, confirming the presence of SFG Rickettsia spp. involved in human diseases. SFG rickettsiae with public health relevance were found in ticks collected in Lebanon, where the widespread distribution of tick vectors and possible livestock animal hosts in contact with humans may favor transmission to humans. Funded by IZSSI 02/13, IZSSI 10/14, COMPARE, Grant 643476 and by UCLM Own Research Program. Thanks to Pippo Bono for technical support

    Estado gingival y presencia de bacterias del complejo rojo en escolares de 12 años

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    The objective of this study was to determine the gingival state and presence of red complex bacteria in saliva samples of 12-year-old schoolchildren. A calibrated periodontist evaluated biofilm index (BI) (Silness and Löe, 1964), presence of calculus, and gingival index (GI) (Silness and Löe, 1967) in sixty two 12-year-old students of Carmen Lyra School. Saliva samples were collected from each student. The DNA of each sample was extracted and amplified by the polymerase chain reaction (PCR) technique, using specific primers. The BI was 1.18. Calculus was present in 40.40% of the schoolchildren examined; 19.4% was supragingival calculus and 21% both supragingival and subgingival calculus. The GI was 0.97, which according to Silness and Löe is mild gingivitis. Gingivitis was present in 96.8% of the children examined. Regarding the PCR tests: 18 of the samples (31.58%) did not present any of the bacteria analyzed and the remaining 39 samples (68.42%) were positive for at least the presence of red complex bacteria. Within the limitations of this study, it is concluded that the prevalence of gingivitis and calculus is high in the sample examined, and the gingival state observed in the study population, may be related to the presence of red complex bacteria.El objetivo de este estudio era determinar el estado gingival y la presencia de bacterias del complejo rojo en muestras de saliva de niños de 12 años de la Escuela Carmen Lyra. Una periodoncista calibrada evaluó en 62 estudiantes de 12 años de la Escuela Carmen Lyra, el índice de biofilme (IB) (Silness y Löe, 1964), la presencia de cålculo y el índice gingival (IG) (Silness y Löe, 1967). Se recolectaron muestras de saliva de cada estudiante. El ADN de cada muestra fue extraído y amplificado por medio de la prueba PCR, empleando primers específicos, para determinar la presencia de bacterias del complejo rojo. El IB fue de 1.18. El cålculo estuvo presente en el 40.40% de la muestra, se encontró 19.4% de cålculo en supragingival y 21% tanto en supragingival como en subgingival. El IG fue de 0.97, que de acuerdo con Silness y Löe es una gingivitis leve. La gingivitis estuvo presente en el 96.8 % de los niños examinados. Con respecto a las pruebas PCR: 18 de las muestras (31.58 %) no presentaron ninguna de las bacterias analizadas y las 39 muestras restantes (68.42 %) fueron positivas por lo menos a la presencia de las bacterias del complejo rojo. Dentro de las limitaciones de este estudio, se concluye que la prevalencia de gingivitis y cålculo es alta en la muestra examinada y el estado gingival observado puede estar relacionado con la presencia de bacterias del complejo rojo.UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Båsicas::Centro de Investigación en Biología Celular y Molecular (CIBCM)UCR::Vicerrectoría de Docencia::Salud::Facultad de Odontologí

    Determination of methane and carbon dioxide surface emissions in a Spanish landfill

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    Fugitive emissions from the surface of landfills constitute an important source of carbon dioxide and methane that are emitted to the atmosphere and contribute to the greenhouse effects. Quantifying those emissions can give valuable information, not only, on the amount of those gases which are released into the atmosphere but on their environmental consequences. They can also help to evaluate another aspects related to the landfill management like the seal efficiency or the gas recovery. Quantifying these emissions is not an easy task, due to the heterogeneity of the waste into the landfills, their huge dimensions and the influence of others factors like the site meteorology. Several measurement methods as well as prediction models for determine this type of emissions can be found in the bibliography. In this study a process in two steps, as described on the Guidance on monitoring landfill gas surface emissions (EA 2010), was followed in order to obtain the fugitive emissions of two landfill sites in Madrid (Spain). The first step consists on a walkover survey. At this stage the gas concentration close to the surface is monitored and zones with equal concentrations are defined. At the same time, significant emission sources and failures in the gas collection system are identified. All this information is used to choose the sample points for the second step, the flux box study. A flux box or flux chamber is a well known volume dispositive that allows to accumulate and to quantify over time emissions emanating from a given area of the landfill. To measure the composition of methane inside the flux box, a portable detector based on Infrared (IR) Absorption Spectroscopy (Sensit PMD) in combination with an electronic narrow band pass filter technology is being used. Carbon dioxide emissions were obtained using a passive IR sensor for CO2 (Kimo HQ210). Some preliminary results show the possibility of quantifying emissions rates from less than 1 mg/m2h to 104 mg/m2h or even higher. From a number of measures of this type in the selected emissions points the total amount of the surface emission of the landfill could be estimated. This method has been used in two landfills. The first one is a closed landfill that has been exploited for almost 40 years and was closed in 2000. In this case the landfill gas extracted is being used to generate electricity. The other one corresponds to a landfill which is still in use and the extracted gas is being burnt in a flare. Another critical difference between the two landfills is the type of cover used. In the closed landfill there is a high density polyethylene film while in the other one there is only a clay and sand barrier as cover. The walkover survey results show lower concentrations of methane on the closed landfill. This is an evidence of the effectiveness of a good seal combined with the active extraction and use of the gas to reduce methane release

    Immunogenicity, transplacental transfer of pertussis antibodies and safety following pertussis immunization during pregnancy: Evidence from a randomized, placebo-controlled trial.

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    Background: Pertussis immunization during pregnancy is recommended in many countries. Data from large randomized controlled trials are needed to assess the immunogenicity, reactogenicity and safety of this approach. Methods: This phase IV, observer-blind, randomized, placebo-controlled, multicenter trial assessed immunogenicity, transplacental transfer of maternal pertussis antibodies, reactogenicity and safety of a reduced-antigen-content diphtheria-tetanus-three-component acellular pertussis vaccine (Tdap) during pregnancy. Women received Tdap or placebo at 27–36 weeks’ gestation with crossover 72-hourpostpartum immunization. Immune responses were assessed before the pregnancy dose and 1 month after, and from the umbilical cord at delivery. Superiority (primary objective) was reached if the lower limits of the 95% confidence intervals (CIs) of the pertussis geometric mean concentration (GMC) ratios (Tdap/control) in cord blood were 1.5. Solicited and unsolicited adverse events (AEs) and pregnancy-/ neonate-related AEs of interest were recorded. Results: 687 pregnant women were vaccinated (Tdap: N = 341 control: N = 346). Superiority of the pertussis immune response (maternally transferred pertussis antibodies in cord blood) was demonstrated by the GMC ratios (Tdap/control): 16.1 (95% CI: 13.5–19.2) for anti-filamentous hemagglutinin, 20.7 (15.9–26.9) for anti-pertactin and 8.5 (7.0–10.2) for anti-pertussis toxoid. Rates of pregnancy-/ neonate-related AEs of interest, solicited general and unsolicited AEs were similar between groups. None of the serious AEs reported throughout the study were considered related to maternal Tdap vaccination. Conclusions: Tdap vaccination during pregnancy resulted in high levels of pertussis antibodies in cord blood, was well tolerated and had an acceptable safety profile. This supports the recommendation of Tdap vaccination during pregnancy to prevent early-infant pertussis disease.post-print502 K

    Antiretroviral therapy duration and immunometabolic state determine efficacy of ex vivo dendritic cell-based treatment restoring functional HIV-specific CD8+ T cells in people living with HIV.

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    Dysfunction of CD8+ T cells in people living with HIV-1 (PLWH) receiving anti-retroviral therapy (ART) has restricted the efficacy of dendritic cell (DC)-based immunotherapies against HIV-1. Heterogeneous immune exhaustion and metabolic states of CD8+ T cells might differentially associate with dysfunction. However, specific parameters associated to functional restoration of CD8+ T cells after DC treatment have not been investigated. We studied association of restoration of functional HIV-1-specific CD8+ T cell responses after stimulation with Gag-adjuvant-primed DC with ART duration, exhaustion, metabolic and memory cell subsets profiles. HIV-1-specific CD8+ T cell responses from a larger proportion of PLWH on long-term ART (more than 10 years; LT-ARTp) improved polyfunctionality and capacity to eliminate autologous p24+ infected CD4+ T cells in vitro. In contrast, functional improvement of CD8+ T cells from PLWH on short-term ART (less than a decade; ST-ARTp) after DC treatment was limited. This was associated with lower frequencies of central memory CD8+ T cells, increased co-expression of PD1 and TIGIT and reduced mitochondrial respiration and glycolysis induction upon TCR activation. In contrast, CD8+ T cells from LT-ARTp showed increased frequencies of TIM3+ PD1- cells and preserved induction of glycolysis. Treatment of dysfunctional CD8+ T cells from ST-ARTp with combined anti-PD1 and anti-TIGIT antibodies plus a glycolysis promoting drug restored their ability to eliminate infected CD4+ T cells. Together, our study identifies specific immunometabolic parameters for different PLWH subgroups potentially useful for future personalized DC-based HIV-1 vaccines. NIH (R21AI140930), MINECO/FEDER RETOS (RTI2018-097485-A-I00) and CIBERINF grants.NIH (R21AI140930), MINECO/FEDER RETOS (RTI2018-097485-A-I00) and CIBERINF grants. We would like to thank the NIH AIDS Reagent Pro- gram, Division of AIDS, NIAID, NIH for providing HIV-1 PTE Gag Peptide Pool from NIAID, DAIDS (cat #11057) for the study. We would also like to thank Alvaro Serrano Navarro, for his help on adapting the lin- ear mixed model previously described by Martin- C ofreces N. et al83 to our data. Graphical schematic rep- resentations were created with BioRender.com. EMG was supported by the NIH R21 program (R21AI140930), the RamĂłn y Cajal Program (RYC2018- 024374-I), the MINECO/FEDER RETOS program (RTI2018-097485-A-I00), by Comunidad de Madrid Talento Program (2017-T1/BMD-5396) and by Gilead becas de investigaci on (GLD19/00168). EMG and IDS are supported by Centro de InvestigaciĂłn BiomĂ©dica en Red (CIBERINF) de Enfermedades Infecciosas (CB21/ 13/00107). MCM was supported by NIH R21 program (R21AI140930), “La Caixa Banking Foundation (H20- 00218) and Gilead becas de investigaci on (GLD19/ 00168). MJB is supported by the Miguel Servet program funded by the Spanish Health Institute Carlos III (CP17/00179), the MINECO/FEDER RETOS program (RTI2018-101082-B-100), and FundaciĂł La Marat o TV3 (201805-10FMTV3). EMG and MJB are both funded by “La Caixa Banking Foundation (H20-00218) and by REDINCOV grant from FundaciĂł La Marat o TV3. FSM was supported by SAF2017-82886-R and PDI-2020- 120412RB-I00 grants from the Ministerio de Ciencia e Innovaci on, and HR17-00016 grant from “La Caixa Banking Foundation. HF was funded by PI21/01583 grant from Ministerio de Ciencia e InnovaciĂłn, Instituto de Salud Carlos III. MJC was supported by PID2019- 104406RB-I00 from Ministerio de Ciencia e InnovaciĂłn. ISC was funded by the CM21/00157 Rio- Hortega grant. IT was supported by grant for the pro- motion of research studies master-UAM 2021.S
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