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A Gene Therapy Study for Hemophilia B

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02484092
Recruitment Status : Completed
First Posted : June 29, 2015
Last Update Posted : January 10, 2020
Information provided by (Responsible Party):

Brief Summary:
A Phase 1/2, Open-Label, Non-Randomized, Dose-Escalation Study of SPK-9001 in Subjects with Hemophilia B.

Condition or disease Intervention/treatment Phase
Hemophilia B Biological: SPK-9001 Phase 2

Detailed Description:

Hemophilia B, or Christmas disease, is a genetic bleeding disorder resulting in the lack of ability to produce blood-clotting factor IX (FIX). Individuals with hemophilia B suffer repeated bleeding events, which can cause chronic joint disease and sometimes leads to death due to the inability for blood to clot efficiently. This chronic joint disease can have significant physical, psychosocial, and quality-of-life effects, including financial burden. The current treatment is intravenous infusion of FIX protein products, either prophylactically or in response to bleeding.

The approach being tested in this study uses a novel recombinant adeno-associated virus (AAV), which in nature causes no disease, to deliver the human factor IX (hFIX) gene to the liver cells where FIX is normally made. Recent data of a gene therapy study showed preliminary encouraging results with the approach of using an AAV vector carrying the factor IX gene. This study will seek to determine the safety and kinetics of a single IV infusion of SPK-9001 (a novel AAV vector carrying a high specific activity factor IX variant).

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 15 participants
Intervention Model: Sequential Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Gene Therapy, Open-label, Dose-escalation Study of PF-06838435 (SPK-9001) [Adeno-associated Viral Vector With Human Factor IX Gene] in Subjects With Hemophilia B
Actual Study Start Date : November 18, 2015
Actual Primary Completion Date : April 8, 2019
Actual Study Completion Date : April 23, 2019

Arm Intervention/treatment
Experimental: SPK-9001
Single intravenous (i.v.) infusion of SPK-9001 [an adeno-associated viral (AAV) vector with human factor IX gene] Intervention: Gene Therapy / Gene Transfer
Biological: SPK-9001
A novel, bioengineered adeno-associated viral vector carrying human factor IX variant

Primary Outcome Measures :
  1. Number of participants experiencing drug-related adverse events [ Time Frame: 1 year ]
    As assessed by physical exam, vital signs, standard clinical labs, and Bethesda assay for FIX inhibitor

Secondary Outcome Measures :
  1. Changes from baseline in circulating FIX activity (IU/dL or % normal) [ Time Frame: 1 Year ]
    FIX activity

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   Male
Gender Based Eligibility:   Yes
Gender Eligibility Description:   Genetic Males
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Able to provide informed consent and comply with requirements of the study
  • Males ≥18 y.o. with confirmed diagnosis of hemophilia B (≤2 IU/dL or ≤2% endogenous factor IX)
  • Received ≥50 exposure days to factor IX products
  • A minimum average of 4 bleeding events per year requiring episodic treatment of factor IX infusions or prophylactic factor IX infusions
  • No measurable factor IX inhibitor as assessed by the central laboratory and have no prior history of inhibitors to factor IX protein
  • Agree to use reliable barrier contraception until 3 consecutive samples are negative for vector sequences

Exclusion Criteria:

  • Evidence of active hepatitis B or C
  • Currently on antiviral therapy for hepatitis B or C
  • Have significant underlying liver disease
  • Have serological evidence* of HIV-1 or HIV-2 with CD4 counts ≤200/mm3 (* subjects who are HIV+ and stable with CD4 count >200/mm3 and undetectable viral load are eligible to enroll)
  • Neutralizing antibodies reactive with AAV-Spark100 above and/or below a defined titre
  • Participated in a gene transfer trial within the last 52 weeks or in a clinical trial with an investigational drug within the last 12 weeks
  • Unable or unwilling to comply with study assessments

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02484092

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United States, California
UC Davis Comprehensive Cancer Center
Sacramento, California, United States, 95817
UC Davis CTSC Clinical Research Center
Sacramento, California, United States, 95817
UC Davis Ellison Ambulatory Care Clinic
Sacramento, California, United States, 95817
UC Davis Investigational Pharmacy
Sacramento, California, United States, 95817
UC Davis Medical Center
Sacramento, California, United States, 95817
United States, Mississippi
University of Mississippi Medical Center
Jackson, Mississippi, United States, 39216
Mississippi Center for Advanced Medicine
Madison, Mississippi, United States, 39110
United States, New York
Weill Cornell Medicine - New York Presbyterian Hospital
New York, New York, United States, 10065
United States, Pennsylvania
The Children's Hospital of Philadelphia
Philadelphia, Pennsylvania, United States, 19104
Australia, New South Wales
Royal Prince Alfred Hospital
Camperdown/Sydney, New South Wales, Australia, 2050
Sponsors and Collaborators
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Study Director: Pfizer Call Center Pfizer

Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Pfizer Identifier: NCT02484092    
Other Study ID Numbers: C0371005
SPK-9001-101 ( Other Identifier: Alias Study Number )
First Posted: June 29, 2015    Key Record Dates
Last Update Posted: January 10, 2020
Last Verified: January 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at:

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Pfizer:
Hemophilia B
Blood Coagulation Disorders
Gene Therapy
Gene Transfer
Factor IX Deficiency
Factor IX Gene
Factor IX Protein
Additional relevant MeSH terms:
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Hemophilia A
Hemophilia B
Blood Coagulation Disorders, Inherited
Blood Coagulation Disorders
Hematologic Diseases
Coagulation Protein Disorders
Hemorrhagic Disorders
Genetic Diseases, Inborn
Genetic Diseases, X-Linked