Early parental death and psychosocial risk factors for dementia: A case-control study in Europe

Objectives: To assess the association between early parental death and the risk of dementia in adult life, and to examine the risk factors associated with early parental death in people with and without dementia. Methods / Design: A population-based case-control study of a sample of 65,997 participants from the Survey of Health, Ageing and Retirement in Europe study. Early parental death was operationalized as parental death at the age of ≤ 16 years. Main analyses were conducted using bivariate and multivariate logistic regression analyses. Results: The odds ratio (OR) for dementia in individuals who experienced early parental death (father or mother) at the age of ≤ 16 years was 1.83 (95%CI 1.61-2.09) and 1.54 (95%CI 1.35-1.76) adjusted for age, gender, and education. In the multivariate logistic regression analysis carried out with the whole sample, early parental death increased the risk of dementia (OR = 1.50, 95%CI 1.31-1.72), along with older age (OR = 5.92, 95%CI 4.86-7.17), neuroticism (OR = 2.94,95%CI 2.61-3.31), low education level (OR = 1.84, 95%CI 1.64- 2.05) and low income (OR = 1.49, 95%CI 1.34-1.67). Discussion: Early parental death (< 16 years) was associated with an increased risk of dementia. We discuss the neurobiological markers associated with adverse childhood experiences (ACEs) and dementia as well as interventions to counteract the negative health effects on adults

Field Emission from Self-Assembled Arrays of Lanthanum Monosulfide Nanoprotrusions

The field emission properties of LaS nanoprotrusions called nanodomes, formed by pulsed laser deposition on porous anodic alumina films, have been analyzed with scanning anode field emission microscopy. The voltage necessary to produce a given field emission current is 3.5 times less for nanodomes than for thin films. Assuming the same work function for LaS thin films and nanoprotrusions, that is, 1 eV, a field enhancement factor of 5.8 is extracted for the nanodome emitters from Fowler-Nordheim plots of the field emission data. This correlates well with the aspect ratio of the tallest nanodomes observed in atomic force micrograph measurements

Adicción al móvil e internet en adolescentes y su relación con problemas psicopatológicos y variables protectoras

The objectives of this study were to analyse the relationship between psychopathological problems and mobile phone and internet abuse in adolescents, and whether certain variables that offer protection from psychopathological problems also offer protection against this type of abuse. We administered two questionnaires that measure such abuse. The study included a sample of 269 adolescents aged between 12 and 18 years (124 boys and 145 girls). The YSR, CERI, and CERM questionnaires were used to measure psychopathology, internet abuse, and mobile abuse, respectively. The results showed that the abuse of new technologies is particularly related to externalizing symptoms and attention deficit. It was found that variables such as the number of clubs to which the participants belonged, their relationship with parents, autonomy, and school performance in science are protective variables against mobile phone and internet abuse. At the age of 15 years, there was a significant increase in the use of these technologies and their associated psychopathological problems.Se analizó la relación entre psicopatología y abuso del móvil e internet en adolescentes, además, se analizaron si ciertas variables protectoras de psicopatología protegen también del abuso del móvil e internet y se calcularon los puntos de corte dos cuestionarios que miden el abuso de estas tecnologías. Se empleó una muestra de 269 adolescentes entre 12 y 18 años (124 chicos y 145 chicas) y se usaron los cuestionarios YSR para medir psicopatología, CERI abuso de internet y CERM abuso del móvil. Los resultados mostraron que el abuso de las nuevas tecnologías se relaciona con sintomatología externalizante y de déficit de atención. Se halló que el número de clubs a los que pertenecen, relación con los padres, autonomía y rendimiento escolar en ciencias, son variables protectoras frente al abuso del móvil e internet. Además, a los 15 años aumenta significativamente el uso de estas tecnologías y la psicopatología asociada

Drp1 overexpression induces desmin disassembling and drives kinesin-1 activation promoting mitochondrial trafficking in skeletal muscle

Mitochondria change distribution across cells following a variety of pathophysiological stimuli. The mechanisms presiding over this redistribution are yet undefined. In a murine model overexpressing Drp1 specifically in skeletal muscle, we find marked mitochondria repositioning in muscle fibres and we demonstrate that Drp1 is involved in this process. Drp1 binds KLC1 and enhances microtubule-dependent transport of mitochondria. Drp1-KLC1 coupling triggers the displacement of KIF5B from kinesin-1 complex increasing its binding to microtubule tracks and mitochondrial transport. High levels of Drp1 exacerbate this mechanism leading to the repositioning of mitochondria closer to nuclei. The reduction of Drp1 levels decreases kinesin-1 activation and induces the partial recovery of mitochondrial distribution. Drp1 overexpression is also associated with higher cyclin-dependent kinase-1 (Cdk-1) activation that promotes the persistent phosphorylation of desmin at Ser-31 and its disassembling. Fission inhibition has a positive effect on desmin Ser-31 phosphorylation, regardless of Cdk-1 activation, suggesting that induction of both fission and Cdk-1 are required for desmin collapse. This altered desmin architecture impairs mechanotransduction and compromises mitochondrial network stability priming mitochondria transport through microtubule-dependent trafficking with a mechanism that involves the Drp1-dependent regulation of kinesin-1 complex

Accuracy and limitations of the growth hormone (GH) releasing hormone-arginine retesting in young adults with childhood-onset GH deficiency

Background: Re-testing for GH secretion is needed to confirm the diagnosis of GH deficiency (GHD) after adult height achievement in childhood-onset GHD (COGHD). Aim: To define the cut-off of GH peak after retesting with GH-releasing hormone plus arginine (GHRHarg) in the diagnosis of permanent GHD in COGHD of different etiology. Patients and methods: Eighty-eight COGHD (median age 17.2 y), 29 idiopathic GHD (IGHD), 44 cancer survivors (TGHD) and 15 congenital GHD (CGHD) were enrolled in the study; 54 had isolated GHD (iGHD) and 34 had multiple pituitary hormone deficiencies (MPHD). All were tested with insulin tolerance test (ITT) and GHRHarg. IGHD with a GH response to ITT 656\ub5g/L were considered true negatives and served as the control group, and patients with a GH response &lt;6\ub5g/L as true positives. Baseline IGF-I was also measured. The diagnostic accuracy of GHRHarg testing and of IGF-I SDS in patients with GHD of different etiologies was evaluated by ROC analysis. Results: Forty-six subjects with a GH peak to ITT 656\ub5g/L and 42 with GH peak &lt;6 \ub5g/L showed a GH peak after GHRHarg between 8.8\u2013124\ub5g/L and 0.3\u201326.3\ub5g/L, respectively; 29 IGHD were true negatives, 42 were true positives and 17 with a high likelihood GHD showed a GH peak to ITT 656\ub5g/L. ROC analysis based on the etiology indicated the best diagnostic accuracy for peak GH cutoffs after GHRHarg of 25.3 \ub5g/L in CGHD, 15.7 in TGHD, and 13.8 in MPHD, and for IGF-1 SDS at 122.1 in CGHD, 121.5 in TGHD, and 121.9 in MPHD. Conclusions: Our findings indicate that the best cut-off for GH peak after retesting with GHRHarg changes according to the etiology of GHD during the transition age. Based on these results the diagnostic accuracy of GHRHarg remains questionable

Effective Treatment of Respiratory Alphaherpesvirus Infection Using RNA Interference

BACKGROUND: Equine herpesvirus type 1 (EHV-1), a member of the Alphaherpesvirinae, is spread via nasal secretions and causes respiratory disease, neurological disorders and abortions. The virus is a significant equine pathogen, but current EHV-1 vaccines are only partially protective and effective metaphylactic and therapeutic agents are not available. Small interfering RNAs (siRNA's), delivered intranasally, could prove a valuable alternative for infection control. siRNA's against two essential EHV-1 genes, encoding the viral helicase (Ori) and glycoprotein B, were evaluated for their potential to decrease EHV-1 infection in a mouse model. METHODOLOGY/PRINCIPAL FNDINGS: siRNA therapy in vitro significantly reduced virus production and plaque size. Viral titers were reduced 80-fold with 37.5 pmol of a single siRNA or with as little as 6.25 pmol of each siRNA when used in combination. siRNA therapy in vivo significantly reduced viral replication and clinical signs. Intranasal treatment did not require a transport vehicle and proved effective when given up to 12 h before or after infection. CONCLUSIONS/SIGNIFICANCE: siRNA treatment has potential for both prevention and early treatment of EHV-1 infections