Bullying in schools ? The educator’s role

Worldwide there is a problem with violent incidents occurring amongst learners in schools. Bullying is one mode of violence that often occurs at school level. Bullying means repeatedly attacking a person psychologically, physically and/or emotionally in order to inflict harm. Bullying behaviour cannot be ignored, because the victims often report physical and mental health problems caused by the abuse they suffered. The future of the bully is also at stake, because such a person can turn into an abuser in his or her adult years. This research focused on the challenges for teachers in the school system to handle bullying behaviour. The specific aims of the study were to research the role of school policies and ethos, as well as the teacher’s role, in dealing with bullying. The researchers investigated the problem by using social identity theory as theoretical framework and Christianity as worldview. The researchers mainly used a qualitative research design. Data for this study were collected by means of a literature study and questionnaires with closed questions as well as open-ended questions about teachers’ experiences regarding bullying. The main emphasis was on the feedback on the open-ended questions. It became clear from the research that schools should adopt an anti-bullying policy. Teachers should give more attention to classroom rules and they should become skilled in dealing with bullying. Recommendations were made concerning the role of teachers as well as the place of school ethos and policies when the above-mentioned behavioural problem needs to be managed

Intra-tumor heterogeneity: lessons from microbial evolution and clinical implications

Multiple subclonal populations of tumor cells can coexist within the same tumor. This intra-tumor heterogeneity will have clinical implications and it is therefore important to identify factors that drive or suppress such heterogeneous tumor progression. Evolutionary biology can provide important insights into this process. In particular, experimental evolution studies of microbial populations, which exist as clonal populations that can diversify into multiple subclones, have revealed important evolutionary processes driving heterogeneity within a population. There are transferrable lessons that can be learnt from these studies that will help us to understand the process of intra-tumor heterogeneity in the clinical setting. In this review, we summarize drivers of microbial diversity that have been identified, such as mutation rate and environmental influences, and discuss how knowledge gained from microbial experimental evolution studies may guide us to identify and understand important selective factors that promote intra-tumor heterogeneity. Furthermore, we discuss how these factors could be used to direct and optimize research efforts to improve patient care, focusing on therapeutic resistance. Finally, we emphasize the need for longitudinal studies to address the impact of these potential tumor heterogeneity-promoting factors on drug resistance, metastatic potential and clinical outcome

Spatial and temporal diversity in genomic instability processes defines lung cancer evolution

PMCID: PMC4636050.-- et al.Spatial and temporal dissection of the genomic changes occurring during the evolution of human non-small cell lung cancer (NSCLC) may help elucidate the basis for its dismal prognosis.We sequenced 25 spatially distinct regions from seven operable NSCLCs and found evidence of branched evolution, with driver mutations arising before and after subclonal diversification. There was pronounced intratumor heterogeneity in copy number alterations, translocations, and mutations associated with APOBEC cytidine deaminase activity. Despite maintained carcinogen exposure, tumors from smokers showed a relative decrease in smoking-related mutations over time, accompanied by an increase in APOBEC-associated mutations. In tumors from former smokers, genome-doubling occurred within a smoking-signature context before subclonal diversification, which suggested that a long period of tumor latency had preceded clinical detection. The regionally separated driver mutations, coupled with the relentless and heterogeneous nature of the genome instability processes, are likely to confound treatment success in NSCLC.E.B. is a Rosetrees Trust fellow; M.J.H. has a Cancer Research UK fellowship; N.Mu. received funding from the Rosetrees Trust; M.G. is funded by the UK Medical Research Council; I.V. is funded by Spanish Ministerio de Economía y Competitividad subprograma Ramón y Cajal; R.C.R. and D.M.R. are partly funded by the Cambridge Biomedical Research Centre and Cancer Research UK Cancer Centre; P.V.L. is a postdoctoral researcher of the Research Foundation—Flanders (FWO); S.M.J. is a Wellcome Senior Fellow in Clinical Science; and C.S. is a senior Cancer Research UK clinical research fellow and is funded by Cancer Research UK, the Rosetrees Trust, European Union Framework Programme 7 (projects PREDICT and RESPONSIFY, ID:259303), the Prostate Cancer Foundation, the European Research Council and the Breast Cancer Research Foundation. This research is supported by the National Institute for Health Research University College London Hospitals Biomedical Research Centre.Peer Reviewe