Integrating Psychosocial Support for Children in the Education Sector in Zambia: Lessons from the Programme Implementation Process

Literature suggests that psychosocial support programmes can improve wellbeing and mental health among learners. There is however limited documentation on methodologies and factors that shape integration of such programmes within the education sector. This qualitative study aimed to contribute towards addressing this knowledge gap by analysing the implementation process of the Mainstreaming of Psychosocial Support in the Education Sector programme in Zambia. The study showed that the programme contributed to improved school culture and learning involvement. This transformation led to reduction in school dropout, as well as improved students' wellbeing and performance. These positive results motivated Zambia and other countries to integrate psychosocial support into the education systems. Community engagement, outreach activities, group forums and partnerships were the key programme methodologies that facilitated the integration process. However, limited stakeholder involvement in developing the monitoring process complicated the integration process in the initial stages. In conclusion, effectively facilitating programme integration requires ensuring that the programme is credible, inclusive and has clear implementation guidelines.

Extracellular acidosis impairs P2Y receptor-mediated Ca(2+) signalling and migration of microglia

Microglia are the resident macrophage and immune cell of the brain and are critically involved in combating disease and assaults on the brain. Virtually all brain pathologies are accompanied by acidosis of the interstitial fluid, meaning that microglia are exposed to an acidic environment. However, little is known about how extracellular acidosis impacts on microglial function. The activity of microglia is tightly controlled by 'on' and 'off' signals, the presence or absence of which results in generation of distinct phenotypes in microglia. Activation of G protein coupled purinergic (P2Y) receptors triggers a number of distinct behaviours in microglia, including activation, migration, and phagocytosis. Using pharmacological tools and fluorescence imaging of the murine cerebellar microglia cell line C8B4, we show that extracellular acidosis interferes with P2Y receptor-mediated Ca(2+) signalling in these cells. Distinct P2Y receptors give rise to signature intracellular Ca(2+) signals, and Ca(2+) release from stores and Ca(2+) influx are differentially affected by acidotic conditions: Ca(2+) release is virtually unaffected, whereas Ca(2+) influx, mediated at least in part by store-operated Ca(2+) channels, is profoundly inhibited. Furthermore, P2Y1 and P2Y6-mediated stimulation of migration is inhibited under conditions of extracellular acidosis, whereas basal migration independent of P2Y receptor activation is not. Taken together, our results demonstrate that an acidic microenvironment impacts on P2Y receptor-mediated Ca(2+) signalling, thereby influencing microglial responses and responsiveness to extracellular signals. This may result in altered behaviour of microglia under pathological conditions compared with microglial responses in healthy tissue.