Pharmaceutical Market Europe • July/August 2025 • 19
THOUGHT LEADER
By Jessica Hurley
An infusion in the morning versus the afternoon. That’s it. Yet this simple difference translated into a median progression-free survival (PFS) of 11.3 months versus 5.7 months for patients with non-small-cell lung cancer (NSCLC) receiving immunochemotherapy.1
When this data emerged from the 2025 American Society of Clinical Oncology (ASCO) Annual Meeting, it wasn’t just another clinical finding to file away – it challenged fundamental assumptions about what drives treatment outcomes in precision medicine.
These findings came from a phase 3 study of patients with advanced NSCLC receiving chemotherapy plus immunotherapy, randomised to receive their infusion either before or after 15:00. This simple timing switch led to a difference in PFS of 5.6 months, favouring patients receiving the earlier infusion.1
An effect size of this magnitude rivals those seen with other precision medicine contenders. After all, that same ASCO congress delivered the wins we expected: Zipalertinib hit a 35% response rate in patients with EGFR exon 20 mutations in the phase 2b REZILIENT1 study – exactly the kind of biomarker-driven success that validates our molecular targeting approach in patients progressing after platinum-based chemotherapy.2 Tarlatamab, a DLL3-targeting bispecific T-cell engager (BiTE), extended overall survival from 8.3 to 13.6 months versus chemotherapy in relapsed small-cell lung cancer (DeLLphi-304), another victory for targeted therapy.3
The ‘why’ behind the circadian effect is still unclear – the role of ‘clock’ genes in modulating immune system functional patterns is only beginning to be unpicked, but the precise mechanisms regarding timing of infusions are still vague.4
For pharma and medical communications professionals, this discovery exposes an uncomfortable truth. We’ve built entire scientific strategies around the assumption that we understand why our treatments work. But what happens when breakthroughs arise from factors we previously never thought to question – let alone measure?
The traditional approach – project confidence, avoid uncertainty – breaks down when impressive clinical data comes from unexpected variables. How do we create scientific strategies around the idea that ‘your appointment time might matter as much as your genetics’, even when we can’t predict which factors will surprise us next? Honesty is, perhaps, the most confident route of all.
Most medical communications avoid uncertainty like the plague. But the circadian discovery suggests a different map for the road ahead: what if acknowledging the limits of current knowledge became a differentiator rather than a liability?
The organisations that will lead in precision medicine communications are those that prepare for discoveries they can’t predict. And with the pace of research and data generation increasing each year, there will inevitably be more. Take heart – there’s no need to overhaul messaging; instead, forward-thinking teams are building three core content approaches:
References:
Jessica Hurley is Scientific Director at Synergy Vision
jessica.hurley@synergy-vision.com