Biovica announced that DiviTum®TKa results from an analysis of samples from the large SWOG S0226 study have been published in the highly ranked peer-reviewed scientific journal Clinical Cancer Research, published by the American Association for Cancer Research (AACR). The strong results support using DiviTum®TKa as a tool to monitor disease progression with endocrine therapy in women with hormone receptor positive metastatic breast cancer. As previously announced, results demonstrate that patients with low TKa levels (using a predefined cut-off) before treatment initiation will do significantly better than patients expressing high levels of TKa. Progression free survival (PFS) was 17.3 vs 11.2 months and overall survival (OS) was 58 vs 30 months, respectively. In addition, similar results were observed during treatment, where patients with low TKa showed significantly longer PFS and OS. Furthermore, results support the potential clinical use of DiviTum®TKa to identify low-TKa patients as best suited for endocrine monotherapy, whereas those with elevated TKa values appear to benefit from combination therapies. The analysis measured thymidine kinase activity (TKa) levels in 1,726 serum samples from more than 400 patients in SWOG S0226 and is the largest study to evaluate DiviTum®TKa for prognostic and serial monitoring of metastatic breast cancer. The study constitutes the foundation for the clinical validation of DiviTum®TKa in Biovica’s 510(k)-application to the FDA. DiviTum®TKa is 510(k) pending. Not available for sale in the United States.