Sangamo to Announce Gene Therapy and Ex Vivo Gene-Edited Cell Therapy Data at ASH

Industry News
The following is an excerpt from a press release from Sangamo. Read the press release in its entirety here.

Sangamo Therapeutics Inc., a genomic medicine company, announced that hemophilia A gene therapy clinical data and hemoglobinopathies ex vivo gene-edited cell therapy data will be featured in poster presentations at the 61st Annual Meeting of the American Society of Hematology. The ASH abstracts, which were submitted on Aug. 3, 2019, were released online this morning. The conference will take place in Orlando, Fla, from Dec. 7 to 10, 2019.
Gene Therapy

  • Abstract #2060: “Updated Follow-up of the Alta Study, a Phase 1/2, Open Label, Adaptive, Dose-Ranging Study to Assess the Safety and Tolerability of SB-525 Gene Therapy in Adult Patients with Severe Hemophilia A”
    Presenter: Barbara Konkle, M.D., Bloodworks Northwest, Professor of Medicine at University of Washington
    December 7th, 2019, 5:30-7:30pm Eastern Time

The SB-525 poster will show updated Alta study data including durability of Factor VIII (FVIII) levels, bleeding rate, factor usage, and safety, for all five patients in the high dose cohort of 3e13 vg/kg, with approximately 4 months to 11 months of follow-up after treatment with SB-525.
As of the abstract submission date, four patients in the 3e13 vg/kg cohort achieved FVIII levels within the normal range with no bleeding events reported up to 24 weeks post-administration. These patients did not require FVIII replacement therapy following the initial prophylactic period of up to approximately 3 weeks post-SB-525 administration. The fifth patient in the 3e13 vg/kg cohort had only recently undergone treatment with SB-525 at the time of the abstract submission. As previously reported, one patient had treatment-related serious adverse events (SAEs) of hypotension and fever, which occurred approximately 6 hours after completion of the vector infusion and resolved with treatment within 24 hours, with no loss of FVIII expression. SB-525 is being developed as part of a global collaboration between Sangamo and Pfizer.
“The rapid kinetics of Factor VIII expression, durability of response, and the relatively low intra-cohort variability in the context of a complete cessation of bleeding events and elimination of exogenous Factor VIII usage continues to suggest SB-525 is a differentiated hemophilia A gene therapy,” said Bettina Cockroft, M.D., M.B.A., Chief Medical Officer of Sangamo, commenting on the published abstract. “We are pleased with the progress of the program toward a registrational Phase 3 study led by Pfizer, who announced it has enrolled its first patient in the 6-month Phase 3 lead-in study. We have recently completed the manufacturing technology transfer to Pfizer and initiated the transfer of the IND.”
Read the press release in its entirety here. 
About Sangamo Therapeutics
Sangamo Therapeutics, Inc. is focused on translating ground-breaking science into genomic medicines with the potential to transform patients’ lives using gene therapy, ex vivo gene-edited cell therapy, in vivo genome editing, and gene regulation. For more information about Sangamo, visit

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