Complicity and contestation in the gentrifying urban primary school.

The transformation of primary schools in gentrifying localities has sometimes been referred to as a form of ‘class colonisation’. This article draws on ethnographic research with teachers, teaching assistants, and parents in two inner-London primary schools to explore the largely unexamined role of school leaders (headteachers) in mediating gentrification processes within urban schools. It argues that institutional history, contexts of headship and leadership style all play an important role in negotiating and recontextualising middle-class mobilisation and power to re-shape primary schools. Headteachers’ relationship to gentrification is therefore not simply one of complicity, but often of contestation and conflict. This article therefore challenges understandings of gentrification as a hegemonic process, and contributes to a more nuanced picture of the educational consequences of gentrification, particularly the institutional realities and experiences of urban social change

An Inducible Cartilage Oligomeric Matrix Protein Mouse Model Recapitulates Human Pseudoachondroplasia Phenotype

Cartilage oligomeric matrix protein (COMP) is a pentameric extracellular protein expressed in cartilage and other musculoskeletal tissues. Mutations in the COMP gene cause pseudoachondroplasia (PSACH), a severe dwarfing condition that has a growth plate chondrocyte pathology. PSACH is characterized by intracellular retention of COMP and other extracellular matrix (ECM) proteins, which form an ordered matrix within large rough endoplasmic reticulum cisternae. This accumulation is cytotoxic and causes premature chondrocyte cell death, thereby depleting chondrocytes needed for normal long bone growth. Research to define the underlying molecular mechanisms of PSACH has been hampered by the lack of a suitable model system. In this study, we achieved robust expression of human mutant (MT) or wild-type (WT) COMP in mice by using a tetracycline-inducible promoter. Normal growth plate distribution of ECM proteins was observed in 1-month-old WT-COMP and C57BL\6 control mice. In contrast, the structure of the MT-COMP growth plate recapitulated the findings of human PSACH growth plate morphology, including (1) retention of ECM proteins, (2) intracellular matrix formation in the rER cisternae, and (3) increased chondrocyte apoptosis. Therefore, we have generated the first mouse model to show extensive intracellular retention of ECM proteins recapitulating the human PSACH disease process at the cellular level