AstraZeneca’s Lupus Drug Saphnelo Shows 56.2% Response in Phase 3 SC Trial

AZNAZN

In the Phase 3 TULIP-SC trial, AstraZeneca’s self-injectable Saphnelo achieved a 56.2% reduction in disease activity versus 37.1% for placebo, with a favorable safety profile. Saphnelo is approved in over 70 countries and has been administered to more than 40,000 patients globally.

1. AstraZeneca and BostonGene Forge AI-Driven Oncology Partnership

On January 5, 2026, AstraZeneca announced a multi-year collaboration with BostonGene to integrate the company’s multimodal AI foundation model for tumor and immune biology into early-stage oncology trials. Under the agreement, AstraZeneca will deploy BostonGene’s platform—combining cell-free RNA profiling, tumor microenvironment analytics and deep learning—to generate patient-level predictions of safety and efficacy. By incorporating these insights into trial design, the partners aim to shorten development timelines by up to 20% and reduce the probability of late-stage attrition, according to internal modeling. The collaboration will initially focus on three asset programs in solid tumors, with options to expand across AstraZeneca’s broader oncology portfolio.

2. Saphnelo Subcutaneous Injection Achieves Statistically Significant Phase 3 Success

In mid-December 2025, AstraZeneca reported positive topline results from the TULIP-SC Phase 3 trial evaluating a self-injectable formulation of Saphnelo (anifrolumab) in systemic lupus erythematosus. The trial enrolled over 450 patients across North America and Europe and demonstrated a 56.2% reduction in validated disease activity scores at week 52, compared with 37.1% in the placebo arm (p<0.0001). Safety analyses showed comparable rates of serious adverse events (8.3% versus 7.9%), with no new safety signals identified. Saphnelo is already approved in more than 70 countries and has been administered to over 40,000 patients to date; the new self-injectable format is expected to expand patient access and support label extensions in high-growth markets.

Sources

BBG