How the Dark Triad associated with internet gaming disorder? The serial mediation of basic psychological needs satisfaction and negative coping styles.

According to the I-PACE model, this study focused on the role of need satisfaction and negative coping styles in the relationship between the Dark Triad (i.e., Machiavellianism, psychopathy, and narcissism) and internet gaming disorder (IGD). In a sample of 749 emerging adult gamers, a multiple mediation model with Dark Triad as the distal variable, psychological need satisfaction and negative coping style as mediating variables, and IGD as the outcome variable was tested. Results indicated that Machiavellianism and psychopathy were found to be significant predictors of IGD when mediated by psychological need satisfaction and negative coping styles. Narcissism predicts IGD only through the indirect effect of negative coping styles. The findings enhanced our understanding that Machiavellianism and psychopathy are characterized by compensatory use of internet games, as well as added new perspectives to the understanding of addiction mechanisms in narcissists.

THE ENDOPARASITOID Pteromalus puparum INFLUENCES HOST GENE EXPRESSION WITHIN FIRST HOUR OF PARASITIZATION.

The small cabbage butterfly, Pieris rapae, is an important pest of cruciferous corps, and Pteromalus puparum is a predominant pupal endoparasitoid wasp of this butterfly. For successful development of parasitoid offspring, female parasitoids usually introduce one or several kinds of maternal factors into the hemocoels during oviposition to suppress host immunity. To investigate the early changes in host immune-related genes following parasitization, we analyzed transcriptomes of parasitized and unparasitized, control, host pupae. Approximately 17.7 and 19.3 million paired-end reads were generated from nonparasitized and parasitized host pupae, and assembled de novo into 45,639 transcripts and 27,659 nonredundant unigenes. The average unigene length was 790 bp. A total 18,377 of 27,659 unigenes were annotated and we identified 557 differentially expressed unigenes in host pupae at 1 h after parasitization, of which 21 were immune-related. Parasitization led to downregulation of most pattern recognition receptors and upregulation of all serine protease inhibitors. The transcirptomic profile of P. rapae is considerably affected by parasitization. This study provides valuable sources for future investigations of the molecular interaction between P. puparum and its host P. rapae.