Summary

for males ages 18 years and up (full criteria)
at San Francisco, California and other locations
study started
estimated completion:
Andrew Leavitt

Description

Summary

The purpose of the study is to evaluate the safety, tolerability and time-course profile of FVIII activity levels with adaptive doses of SB-525.

Official Title

A Phase 1/2, Open-Label, Adaptive, Dose-Ranging Study to Assess the Safety and Tolerability of SB-525 (Recombinant AAV2/6 Human Factor 8 Gene Therapy) in Adult Subjects With Severe Hemophilia A

Details

The objective of the study is to reduce or eliminate the need for FVIII replacement therapy. The proposed SB-525 clinical study uses a recombinant adeno-associated virus 2/6 (AAV2/6) vector encoding the cDNA for the B-domain deleted human F8 (hF8). The secreted FVIII has the same amino acid sequence as approved recombinant anti hemophilic factors (Refacto® and Xyntha®). The SB-525 vector encodes a liver-specific promotor module and AAV2/6 exhibits liver tropism, thus providing the potential for long-term hepatic production of FVIII in hemophilia A subjects.

The constant production of FVIII after a single SB-525 administration may provide potential benefit in durable protection against bleeding and the complications thereof without lifelong repetitive IV factor replacement administration.

Keywords

Hemophilia A Factor VIII SB-525 Sequential dose escalation

Eligibility

You can join if…

Open to males ages 18 years and up

  • Male ≥18 years of age
  • Severe hemophilia A (past evidence of circulating FVIII activity of < 1% normal)
  • Treated or exposed to FVIII concentrates or cryoprecipitate for at least 150 exposure days
  • ≥12 bleeding episodes if receiving on-demand therapy over the preceding 12 months
  • Agree to use double barrier contraceptive until at least 3 consecutive semen samples are negative for AAV 2/6 after SB-525 infusion

You CAN'T join if...

  • Presence of neutralizing antibodies
  • Current inhibitor, or history of FVIII inhibitor (except for transient low titer inhibitor detected in childhood)
  • History of hypersensitivity response to FVIII
  • History of Hepatitis B or HIV-1/2 infection
  • History of Hepatitis C, unless viral assays in two samples, collected at least 6 months apart, are negative
  • Evidence of any bleeding disorder in addition to hemophilia A
  • Markers of hepatic inflammation or overt or occult cirrhosis
  • History of chronic renal disease or creatinine ≥ 1.5 mg/dL
  • Presence of liver mass on magnetic resonance imaging (MRI), or, positive alpha fetoprotein
  • Presence of > grade 2 liver fibrosis on elastography for subjects with history of treated Hepatitis C or suspicion of chronic liver disease

Locations

  • University of California, San Francisco accepting new patients
    San Francisco California 94117 United States
  • UC Davis Medical Center accepting new patients
    Sacramento California 95817 United States
  • City of Hope National Medical Center accepting new patients
    Duarte California 91010 United States

Details

Status
accepting new patients
Start Date
Completion Date
(estimated)
Sponsor
Sangamo Therapeutics
ID
NCT03061201
Phase
Phase 1/2
Lead Scientist
Andrew Leavitt
Study Type
Interventional
Last Updated
June 21, 2018