On April 20, 2026 Aditxt, Inc. (Nasdaq: ADTX) ("Aditxt" or the "Company"), a social innovation platform accelerating promising health innovations, reported that its precision oncology subsidiary, Ignite Proteomics, LLC ("Ignite" or "Ignite Proteomics"), has been featured in a peer-reviewed study published online ahead of print in npj Precision Oncology, a Nature journal. The study, led by investigators at Dana-Farber Cancer Institute, evaluated outcomes among patients with metastatic breast cancer treated with trastuzumab deruxtecan (T-DXd, marketed as Enhertu by AstraZeneca and Daiichi Sankyo) and assessed multiple quantitative HER2-related assays for their association with treatment outcomes.

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While conventional HER2 immunohistochemistry (IHC) showed some association with outcomes in the broader patient population, the study found that quantitative HER2-related assays provided more granular predictive information in several matched biomarker sub-cohorts. In those sub-cohorts, traditional IHC classification often showed limited predictive value compared with quantitative approaches. Ignite’s Reverse Phase Protein Array (RPPA) platform, the only commercially available multiplex assay in the study, was one of the quantitative methods that demonstrated meaningful predictive value for patient outcomes.

T-DXd is an approved treatment option for a broad population of patients with metastatic breast cancer, yet there is currently no reliable way to predict which patients will respond.

"According to several studies, approximately 40% of cancers do not respond to the FDA approved therapy at front line in a metastatic setting," said Jeff Busch, Chief Executive Officer of Ignite Proteomics. In oncology, published research and institutional analyses have shown that approved therapies often fail to benefit a substantial portion of the patients who receive them. A 2017 study published in the BMJ reported that 57% of cancer drug indications approved by the European Medicines Agency entered the market without evidence of improved survival or quality-of-life benefit. MIT researchers have noted that targeted tyrosine kinase inhibitors typically work for only 40% to 80% of patients expected to respond. Johns Hopkins has reported that only 15% to 20% of patients achieve durable results with immunotherapy.

Ignite’s RPPA platform measures multiple protein biomarkers, including pathway activation and payload-relevant markers, from a single tumor sample. In the Dana-Farber study, Ignite’s platform was the only commercially available multiplex assay evaluated and demonstrated predictive value in matched biomarker cohorts where conventional HER2 IHC showed limitations. Notably, the study found that TOPO1 expression, the target of T-DXd’s cytotoxic payload, was detectable by Ignite’s platform in certain HER2-negative patients, highlighting the potential value of measuring tumor biology beyond HER2 expression alone. Ignite’s assay is CLIA-certified, CAP-accredited, listed on the Medicare Clinical Laboratory Fee Schedule under AMA CPT code PLA 0249U, and orderable today on standard biopsy tissue.

"Cancer therapy has made extraordinary progress, but oncology still has a treatment-selection problem," added Busch. "Too many patients receive therapies without enough information about whether those therapies are likely to work for their tumor biology. That is not an indictment of the drugs. These are powerful therapies. The issue is that cancer is complex, and single-marker testing often does not capture the functional biology that drives response or resistance. Ignite’s RPPA platform was built to address that gap by measuring multiple proteins, pathway activation, and payload-relevant biology from the same tumor sample. In this study, one of the world’s leading breast cancer research teams evaluated our platform alongside standard testing, and our platform demonstrated predictive value where conventional testing had limitations. That is the opportunity: better data, better treatment selection, and fewer patients receiving therapies that were never likely to help them."

"This publication represents an important milestone for our subsidiary Ignite and reflects the strength of Aditxt’s model of advancing and scaling impactful health innovations," said Amro Albanna, Co-Founder and Chief Executive Officer of Aditxt. "Peer-reviewed clinical evidence from one of the world’s leading cancer research institutions is key to accelerating the commercialization of this platform and expanding access to it for millions of patients making treatment decisions without clear guidance on what will work. Our goal is to help ensure that more patients receive the right therapy at the right time, with the potential to improve outcomes and make a meaningful difference in people’s lives."

The full study is available open access at: View Source

(Press release, Dana-Farber Cancer Institute, APR 20, 2026, View Source [SID1234664575])