Organizational changes are costly ventures that too often fail to deliver the expected outcomes. Psychological empowerment (PE) and affective commitment to change (ACC) are proposed as especially important in turbulent contexts characterized by multiple and ongoing changes requiring employees' continuing contributions. In such a context, employees' beliefs that the changes are necessary, legitimate, and will be supported, are presumed to increase PE and ACC. In a three-wave longitudinal panel study of 819 employees, we examined autoregressive and cross-lagged relations among latent constructs reflecting change-related beliefs (necessity, legitimacy, support) and psychological reactions (PE, ACC). Our findings suggest that PE and ACC represent largely orthogonal reactions, that PE is influenced more by beliefs regarding support, whereas ACC is shaped more by beliefs concerning necessity and legitimacy.

The tumor suppressor PTEN dephosphorylates PtdIns(3,4,5)P3 into PtdIns(4,5)P2. Here, we make the unexpected discovery that in Drosophila melanogaster PTEN reduces PtdIns(4,5)P2 levels on endosomes, independently of its phosphatase activity. This new PTEN function requires the enzymatic action of dPLCXD, an atypical phospholipase C. Importantly, we discovered that this novel PTEN/dPLCXD pathway can compensate for depletion of dOCRL, a PtdIns(4,5)P2 phosphatase. Mutation of OCRL1, the human orthologue of dOCRL, causes oculocerebrorenal Lowe syndrome, a rare multisystemic genetic disease. Both OCRL1 and dOCRL loss have been shown to promote accumulation of PtdIns(4,5)P2 on endosomes and cytokinesis defects. Here, we show that PTEN or dPLCXD overexpression prevents these defects. In addition, we found that chemical activation of this pathway restores normal cytokinesis in human Lowe syndrome cells and rescues OCRL phenotypes in a zebrafish Lowe syndrome model. Our findings identify a novel PTEN/dPLCXD pathway that controls PtdIns(4,5)P2 levels on endosomes. They also point to a potential new strategy for the treatment of Lowe syndrome.

Introduction: Train-the-trainer (TTT) programs are frequently used to facilitate knowledge dissemination. However, little is known about the effectiveness of these programs. Therefore, we sought to assess the impact of TTT programs on learning and behavior of trainers for educating health and social professionals (trainees). Methods: Guided by the Cochrane Effective Practice and Organisation of Care, we conducted a systematic review. We searched 12 databases until April 2018 and extracted data according to the Population, Intervention, Comparison, Outcome model. Population was defined as trainers delivering training program to health care professionals, and the intervention consists in any organized activity provided by a trainer. There were no restrictive comparators, and outcomes were knowledge, attitude, skill, confidence, commitment, and behavior of trainers. We estimated the pooled effect size and its 95% confidence interval using a random-effect model. We performed a narrative synthesis when meta-analysis was not possible. Results: Of 11,202 potentially eligible references, we identified 16 unique studies. Studies were mostly controlled before-and-after studies and covered a unique training intervention. Targeted trainers were mostly nurses (n = 10) and physicians (n = 5). The most frequent measured outcome was knowledge (n = 12). TTT programs demonstrated significant effect on knowledge (Standardized mean deviation = 0.58; 95% CI = 0.11–1.06; I2 = 90%; P < .01; 10 studies). No studies measured trainers' ability to deliver the training program. Discussion: TTT programs may improve the knowledge of trainers. However, the heterogeneity and small number of studies hamper our ability to draw conclusions that are more robust.