eLife Assessment
In this valuable manuscript, the authors tackle a highly relevant question in biology: how cells integrate attractive and repulsive cues to achieve directed migration. They present solid data demonstrating that two wunen genes act as negative regulators of Hedgehog signalling, thereby enabling efficient primordial germ cell (PGC) migration in Drosophila embryos. Beyond its immediate scope, this work has broader implications, particularly for understanding key mechanisms underlying complex processes such as cancer metastasis, where the coordinated interpretation of guidance cues is critical.