A matter of words: Impact of verbal and nonverbal information on impression formation in high-functioning autism

Clinical intuition and resent research (Senju et al., 2009) suggests that adults with high-functioning autism (HFA) are able to use explicit verbal information but fail to react upon subtle nonverbal cues in order to understand others and navigate social encounters.In order to investigate the relative influence of different domains of socially relevant information in HFA as compared to matched controls, we used verbal and nonverbal stimuli as a basis for an interpersonal impression formation task. Results demonstrated a reduced sensitivity to nonverbal cues in individuals with HFA when consideration of conflicting information from the different domains was required, although HFA participants could well evaluate nonverbal stimuli in isolation. Thus, in a more complex experimental setting nonverbal information had a comparably weak impact on the impression formation confirming that social processing is preferentially based on verbal information in HFA.     

Learning Bayesian networks from survival data using weighting censored instances

Different survival data pre-processing procedures and adaptations of existing machine-learning techniques have been successfully applied to numerous fields in clinical medicine. Zupan et al. (2000) proposed handling censored survival data by assigning distributions of outcomes to shortly observed censored instances. In this paper, we applied their learning technique to two well-known procedures for learning Bayesian networks: a search-and-score hill-climbing algorithm and a constraint-based conditional independence algorithm. The method was thoroughly tested in a simulation study and on the publicly available clinical dataset GBSG2. We compared it to learning Bayesian networks by treating censored instances as event-free and to Cox regression. The results on model performance suggest that the weighting approach performs best when dealing with intermediate censoring. There is no significant difference between the model structures learnt using either the weighting approach or by treating censored instances as event-free, regardless of censoring.     

DNA damage and alterations in expression of DNA damage responsive genes induced by TiO2 nanoparticles in human hepatoma HepG2 cells

We investigated the genotoxic responses to two types of TiO2 nanoparticles (<25 nm anatase: TiO(2)-An, and <100 nm rutile: TiO2-Ru) in human hepatoma HepG2 cells. Under the applied exposure conditions the particles were agglomerated or aggregated with the size of agglomerates and aggregates in the micrometer range, and were not cytotoxic. TiO2-An, but not TiO2-Ru, caused a persistent increase in DNA strand breaks (comet assay) and oxidized purines (Fpg-comet). TiO2-An was a stronger inducer of intracellular reactive oxygen species (ROS) than TiO2-Ru. Both types of TiO2 nanoparticles transiently upregulated mRNA expression of p53 and its downstream regulated DNA damage responsive genes (mdm2, gadd45α, p21), providing additional evidence that TiO2 nanoparticles are genotoxic. The observed differences in responses of HepG2 cells to exposure to anatase and rutile TiO2 nanoparticles support the evidence that the toxic potential of TiO2 nanoparticles varies not only with particle size but also with crystalline structure.     

Antioxidant and antigenotoxic effects of rosemary (Rosmarinus officinalis L.) extracts in Salmonella typhimurium TA98 and HepG2 cells

In the present study the chemopreventive effects of water soluble AquaROX^® 15 and oil soluble VivOX^® 40 rosemary extracts against 4-nitroquinoline-N-oxide (NQNO) and 2-amino-3-methyl-3H-imidazo[4,5-F]quinoline (IQ) induced mutagenicity in the reverse mutation assays with Salmonella typhimurium TA98 and against t-butyl hydroperoxide (t-BOOH), benzo(a)pyrene (BaP) and 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) induced DNA damage in HepG2 cells were studied, applying the comet assay. The results showed comparable protective effect of AquaROX and VivOX against oxidative DNA damage, whereas protection against indirect active genotoxic carcinogens was more efficient by VivOX.     

Behavioral characterization of cereblon forebrain-specific conditional null mice: a model for human non-syndromic intellectual disability

A nonsense mutation in the human cereblon gene (CRBN) causes a mild type of autosomal recessive non-syndromic intellectual disability (ID). Animal studies show that crbn is a cytosolic protein with abundant expression in the hippocampus (HPC) and neocortex (CTX). Its diverse functions include the developmental regulation of ion channels at the neuronal synapse, the mediation of developmental programs by ubiquitination, and a target for herpes simplex type I virus in HPC neurons. To test the hypothesis that anomalous CRBN expression leads to HPC-mediated memory and learning deficits, we generated germ-line crbn knock-out mice (crbn^−/−). We also inactivated crbn in forebrain neurons in conditional knock-out mice in which crbn exons 3 and 4 are deleted by cre recombinase under the direction of the Ca²⁺/calmodulin-dependent protein kinase II alpha promoter (CamKII^cre/+, crbn^−/−). crbn mRNA levels were negligible in the HPC, CTX, and cerebellum (CRBM) of the crbn^−/− mice. In contrast, crbn mRNA levels were reduced 3- to 4-fold in the HPC, CTX but not in the CRBM in CamKII^cre/+, crbn^−/− mice as compared to wild type (CamKII^cre/+, crbn^+/+). Contextual fear conditioning showed a significant decrease in the percentage of freezing time in CamKII^cre/+, crbn^−/− and crbn^−/− mice while motor function, exploratory motivation, and anxiety-related behaviors were normal. These findings suggest that CamKII^cre/+, crbn^−/− mice exhibit selective HPC-dependent deficits in associative learning and supports the use of these mice as in vivo models to study the functional consequences of CRBN aberrations on memory and learning in humans.     

The framework of family therapy in clinical practice and research in Serbia

In the last two decades, Serbia has had to deal with multiple social and economic problems reflecting on society's demographics and seemed to weaken its core cell - the family. The paper describes the framework of family therapy in clinical practice and research, within the recent transition of the Serbian family. Family therapy treatment in Serbia uses the systemic family therapy (SFT) approach, applied according to the standards of the European Association for Psychotherapy. A large number of professionals who practise in Serbia hold European qualifications, setting high standards in education, clinical practice, and research. Although SFT is also available in the private sector, the majority of patients are still treated in state institutions. Family therapy is often used for adults and adolescents with psychosis and addictions in psychiatric hospital settings. However, in counselling centres it is used for marital and relationship problems. Interestingly, family therapy has recently started to emerge as a more frequent tool in consultation-liaison, particularly psycho-oncology but also in correctional institutions. The clinical practice and research interests are interlinked with changes in social settings.