ALBERT

Description: What does it mean to work with radical concepts in our time of rampant inequality, imperial-capitalist plunder, racial/sexual/class violence and ecocide? When concepts from the past seem inadequate, how do scholars and activists concerned with social change decide what concepts to work with or renew? The contributors to Ethnographies of Power address these questions head on. Gillian Hart is a key thinker in radical political economy, geography, development studies, agrarian studies and Gramscian critique of postcolonial capitalism. In Ethnographies of Power each contributor engages her work and applies it to their own field of study. These applied concepts include: ‘gendered labour’ practices among South African workers, reading ‘racial capitalism’ through agrarian debates, using ‘relational comparison’ in an ethnography of schooling across Durban, reworking ‘multiple socio-spatial trajectories’ in Guatemala’s Maya Biosphere Reserve, critiquing the notion of South Africa’s ‘second economy’, revisiting ‘development’ processes and ‘Development’ discourses in US military contracting, reconsidering Gramsci’s ‘conjunctures’ geographically, finding divergent ‘articulations’ in Cape Town land occupations, and exploring ‘nationalism’ as central to revaluing recyclables at a Soweto landfill. Ethnographies of Power offers an invaluable toolkit for activists and scholars engaged in sharpening their critical concepts for the social and environmental change necessary for our collective future.

Description: Lipoprotein-associated phospholipase A2 (Lp-PLA2) hydrolyses oxidized low-density lipoproteins into proinflammatory products, which can have detrimental effects on vascular function. As a specific inhibitor of Lp-PLA2, darapladib has been shown to be protective against atherogenesis and vascular leakage in diabetic and hypercholesterolemic animal models. This study has investigated whether Lp-PLA2 and its major enzymatic product, lysophosphatidylcholine (LPC), are involved in blood–retinal barrier (BRB) damage during diabetic retinopathy. We assessed BRB protection in diabetic rats through use of species-specific analogs of darapladib. Systemic Lp-PLA2 inhibition using SB-435495 at 10 mg/kg (i.p.) effectively suppressed BRB breakdown in streptozotocin-diabetic Brown Norway rats. This inhibitory effect was comparable to intravitreal VEGF neutralization, and the protection against BRB dysfunction was additive when both targets were inhibited simultaneously. Mechanistic studies in primary brain and retinal microvascular endothelial cells, as well as occluded rat pial microvessels, showed that luminal but not abluminal LPC potently induced permeability, and that this required signaling by the VEGF receptor 2 (VEGFR2). Taken together, this study demonstrates that Lp-PLA2 inhibition can effectively prevent diabetes-mediated BRB dysfunction and that LPC impacts on the retinal vascular endothelium to induce vasopermeability via VEGFR2. Thus, Lp-PLA2 may be a useful therapeutic target for patients with diabetic macular edema (DME), perhaps in combination with currently administered anti-VEGF agents.

Description: Background Australia has maintained low rates of SARS-COV-2 (COVID-19) infection, due to geographic location and strict public health restrictions. However, the financial and social impacts of these restrictions can negatively affect parents’ and children’s mental health. In an existing cohort of mothers recruited for their experience of adversity, this study examined: 1) families’ experiences of the COVID-19 pandemic and public health restrictions in terms of clinical exposure, financial hardship family stress, and family resilience (termed ‘COVID-19 impacts’); and 2) associations between COVID-19 impacts and maternal and child mental health. Methods Participants were mothers recruited during pregnancy (2013–14) across two Australian states (Victoria and Tasmania) for the ‘right@home’ trial. A COVID-19 survey was conducted from May-December 2020, when children were 5.9–7.2 years old. Mothers reported COVID-19 impacts, their own mental health (Depression, Anxiety, Stress Scales short-form) and their child’s mental health (CoRonavIruS Health and Impact Survey subscale). Associations between COVID-19 impacts and mental health were examined using regression models controlling for pre-COVID-19 characteristics. Results 319/406 (79%) mothers completed the COVID-19 survey. Only one reported having had COVID-19. Rates of self-quarantine (20%), job or income loss (27%) and family stress (e.g., difficulty managing children’s at-home learning (40%)) were high. Many mothers also reported family resilience (e.g., family found good ways of coping (49%)). COVID-19 impacts associated with poorer mental health (standardised coefficients) included self-quarantine (mother: β = 0.46, child: β = 0.46), financial hardship (mother: β = 0.27, child: β = 0.37) and family stress (mother: β = 0.49, child: β = 0.74). Family resilience was associated with better mental health (mother: β = -0.40, child: β = -0.46). Conclusions The financial and social impacts of Australia’s public health restrictions have substantially affected families experiencing adversity, and their mental health. These impacts are likely to exacerbate inequities arising from adversity. To recover from COVID-19, policy investment should include income support and universal access to family health services.