On February 26, 2026 TScan Therapeutics, Inc. (Nasdaq: TCRX), a clinical-stage biotechnology company focused on the development of T cell receptor (TCR)-engineered T cell (TCR-T) therapies for the treatment of patients with cancer, reported completion of enrollment into Cohort C of the ALLOHA study. Patients in Cohort C are being treated using the new commercial-ready manufacturing process. The Company also announced that the U.S. Food and Drug Administration (FDA) has cleared its investigational new drug (IND) applications for TSC-102-A01 and TSC-102-A03 for patients with HLA types A*01:01 and A*03:01, respectively.
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"We are excited about the potential of TSC-101 to treat residual disease and prevent relapse in patients undergoing hematopoietic cell transplantation," said Gavin MacBeath, Ph.D., Chief Executive Officer. "We have now enrolled over ten patients in Cohort C of the ALLOHA study where we are treating patients with our new commercial-ready manufacturing process. We look forward to sharing data from this cohort in the second quarter of this year, prior to launching our Phase 3 study. We are also pleased to announce that the FDA has cleared our IND applications for TSC-102-A01 and TSC-102-A03, and we look forward to initiating a Phase 1 trial with these candidates in the second half of this year. We believe the addition of these product candidates will nearly double the addressable U.S. patient population in our heme program."
"During the Tandem Meetings of ASTCT and CIBMTR, we highlighted the relationship between donor chimerism and long-term outcomes in patients following HCT," added Chrystal U. Louis, M.D., Chief Medical Officer. "Specifically, patients that achieved complete donor chimerism by month two after transplant using a high-sensitivity assay have a significantly lower probability of relapse (HR=4.6, p=0.02) compared to those who did not achieve complete donor chimerism. We look forward to sharing early chimerism data from Cohort C and formally initiating our pivotal study for TSC-101."
The Phase 1 ALLOHA study is evaluating TSC-101 in A*02:01-positive patients with heme malignancies undergoing allogeneic hematopoietic cell transplantation (allo-HCT). TScan plans to share safety and early chimerism data from Cohort C in the second quarter of 2026. The Company also plans to launch a pivotal trial for TSC-101 in patients with acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS) in the second quarter of 2026.
The U.S. FDA clearance of INDs for TSC-102-A01 and TSC-102-A03 continues the momentum in TScan’s heme program by expanding HLA coverage to include patients who are HLA-A*01:01-positive or HLA-A*03:01-positive, respectively. These TCR-T therapy candidates target CD45, a protein broadly expressed in heme cells but absent in non-heme tissues.
TScan plans to initiate a Phase 1 trial for both TSC-102-A01 and TSC-102-A03 in the second half of 2026. Products will be manufactured using the commercial-ready process and will enroll patients with various hematologic malignancies undergoing allo-HCT using either reduced intensity conditioning or myeloablative conditioning. The multi-center Phase 1 trial is designed to assess safety and initial efficacy of these TCR-T therapy candidates.
(Press release, TScan Therapeutics, FEB 26, 2026, View Source [SID1234663107])