Sangamo Announces U.K. Authorization Of Clinical Trials Evaluating Zinc Finger Nuclease In Vivo Genome Editing Treatments SB-318 For MPS I And SB-913 For MPS II
Published: Jun 04, 2018
RICHMOND, Calif., June 4, 2018 /PRNewswire/ -- Sangamo Therapeutics, Inc. (Nasdaq: SGMO) today announced that the Medicines and Healthcare Products Regulatory Agency (MHRA) of the United Kingdom has granted the Clinical Trial Authorisation (CTA) for enrollment of subjects into ongoing Phase 1/2 clinical trials evaluating SB-318 and SB-913, zinc finger nuclease (ZFN) in vivo genome editing treatments for Mucopolysaccharidosis Type I (MPS I) and MPS II, respectively.
"Patients with MPS I and MPS II have very few treatment options, and we are excited to expand access to our clinical trials to the U.K.," said Dr. Edward Conner, Chief Medical Officer at Sangamo. "We are pleased with the MHRA's rapid action on our CTA applications and to be working closely with them to advance our evaluation of zinc finger nuclease genome editing treatments into younger patient populations for whom we believe the need and potential benefits are greatest."
The CTA for SB-913 allows for treatment of children as young as five years of age following a review of cumulative safety data from adult and adolescent cohorts. The SB-318 CTA application was based on the protocol of the ongoing Phase 1/2 clinical trial which includes only adult patients. Sangamo plans this year to request a protocol amendment for the SB-318 study to include younger patients.
Sangamo expects to initiate clinical trial sites in the U.K. later this year for the SB-318 and SB-913 Phase 1/2 clinical trials.
Sangamo's In Vivo Genome Editing Approach
To restrict editing to liver cells, the ZFNs and the corrective gene are delivered in a single intravenous infusion using an AAV vector that targets the liver. The ZFNs enter the cells as inactive DNA instructions in a format designed only for liver cells to unlock. Once "unlocked," the ZFNs then identify, bind to and cut the DNA in a specific location within the albumin gene located in liver cells. Using the cells' natural DNA repair processes, liver cells can then insert the corrective gene for IDUA (MPS I) or IDS (MPS II) at that precise location.
The potential to permanently and precisely integrate the therapeutic IDUA (MPS I) or IDS (MPS II) gene into the DNA differentiates Sangamo's in vivo genome editing approach from conventional AAV cDNA gene therapy and from lenti- or retroviral-based gene therapies that insert genes randomly into the genome.
About Sangamo Therapeutics
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SOURCE Sangamo Therapeutics, Inc.
Company Codes: NASDAQ-NMS:SGMO