eLife Assessment
The study investigates an emerging research field: the interaction between sleep and development. The authors used Drosophila larvae sleep as a study model and provide insight into how neuropeptide circuitry control sleep differentially between larvae and adult Drosophila. By using board range of behaviour and imaging methods and analysis, the authors provide a valuable investigation that demonstrates a larvae-specific sleep regulatory neural pathway of Hugin-PK2-Dilps in the Drosophila neurosecretory centre IPC. While some further text clarifications are still required, the revision presented convincing evidence supporting the claims with the new imaging data, sleep parametric analysis, and further clarification addressing the reviewers' comments.