Shattuck Labs announces data from Phase 1A/B clinical trial of SL-172154

Shattuck Labs announced initial topline dose-expansion data from its ongoing Phase 1A/B clinical trial of SL-172154 in combination with AZA in frontline HR-MDS and TP53m AML patients. Initial data from the dose-expansion cohorts build on the complete dose-escalation data featured in a poster presentation on December 11, 2023 at the 65th ASH Annual Meeting. “Both the frontline HR-MDS and TP53m AML expansion cohorts enrolled quickly after completion of the dose escalation study in the middle of this year, and we are pleased to share initial efficacy data, which begin to demonstrate the activity of SL-172154 beyond what is expected of AZA alone. In dose escalation, we saw a monotherapy response to SL-172154 in a heavily pre-treated relapsed/refractory TP53m AML patient that allowed the patient to receive a stem cell transplant. That patient remains disease free.” said Lini Pandite, MBChB, Chief Medical Officer of Shattuck. “In frontline, the rate of complete responses in both the HR-MDS and TP53m AML cohorts is already encouraging, and when coupled with the observation of peripheral blood count recovery in most patients that have not yet achieved a complete response, and the fact that many of these patients are very early in their course of treatment and have not yet reached the median time at which a complete response is expected for azacitidine, suggests that the complete response rate may continue to improve in the coming months. As a result, we have amended both studies to increase the sample size and look forward to providing another update by mid-year 2024.”