The wu wei of brain metastases: When the gift of a pause is also a vulnerability.

Brain-seeding cancer cells exploit an MXD4-dependent proliferative pause that may be targeted to eradicate micrometastases before relapse.

• Why it matters: Understanding how cancer cells survive stress during early metastasis can reveal vulnerabilities for therapeutic intervention, potentially preventing clinical relapse.
• What they did: García-Gómez et al. studied brain-seeding cancer cells and found they utilize an MXD4-dependent pause that restrains MYC and activates stress responses, facilitating survival under stress.
• The result: This proliferative pause, while aiding survival, also presents an Achilles' heel that could be targeted to eliminate micrometastases before they grow into detectable metastases.