Background Public Participation Involvement Engagement (PPIE) is now strongly encouraged across health policy and research. Coproduction, although linked to PPIE is a way of working that can be applied to work collaboratively with participants in health. However, a lack of definition which leads to interchangeable terminology, limited guidance and examples of good practice on how to facilitate the process impedes progress. The Born in Bradford (BiB) research programme consists of a family of observational and longitudinal birth cohort studies (Raynor et al. in BMC Public Health 8:1–13, 2008; Dickerson et al. in BMC Public Health 16(1):1–14, 2016) which include participants from multi-ethnic and socially diverse backgrounds (Uphoff et al. in Int J Equity Health 12:1–12, 2013). Methods This paper aims to highlight our approach to PPIE and coproduction methodologies, to provide an outline of the methods we have utilised to work collaboratively with our cohort populations from diverse communities and how we have managed to overcome challenges to achieve successful PPIE.A secondary aim of this paper is to demonstrate the value of PPIE and coproduction and how it can enhance research.  Some examples from recent years are provided to demonstrate how useful the approach has been for BiB community engagement and community participation. In addition, we discuss the methods we have used and how this methodology has now been embedded into protocol and practice in our research. Results Successful and productive PPIE and coproduction occur where stakeholders are taken on board and realise the impact that their involvement can have in terms of policy design and delivery. Conclusions The involvement of participants and the community in research about them becomes more credible when equal partnerships are formed and they are involved in the whole process leading to community ownership of research. Hence, nothing about us, without us—is for us.

Using a simulated oxidative stress model of hippocampus-derived immortalized cell line (HT22), we report that prooxidant buthionine sulfoximine (BSO, 1 mM, 14 h), without adversely affecting cell viability or morphology, induced oxidative stress by inhibiting glutathione synthesis. BSO treatment also significantly reduced superoxide dismutase (SOD) activity (p < 0.05) and significantly lowered total antioxidant capacity (p < 0.001) in HT22 cells when compared to vehicle treated control cells. Antioxidant tempol, a piperidine nitroxide considered a SOD mimetic, reversed BSO-induced decline in SOD activity (p < 0.01) and also increased BSO-induced decline in total antioxidant capacity (p < 0.05). Interestingly, BSO treatment significantly reduced mitochondrial oxygen consumption (p < 0.05), decreased mitochondrial membrane potential (p < 0.05), and lowered ATP production (p < 0.05) when compared to vehicle treated control cells, collectively indicative of mitochondrial impairment. Antioxidant tempol treatment mitigated all three indicators of mitochondrial impairment. We postulate that BSO-induced oxidative stress in HT22 cells caused mitochondrial impairment, and tempol by increasing SOD activity and improving antioxidant capacity presumably protected the cells from BSO-induced mitochondrial impairment. In conclusion, present study provides an interesting simulation of oxidative stress in hippocampal cells, which will serve as an excellent model to study mitochondrial functions.

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