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Study of SDMB (2,2 Dimethylbutyrate, Sodium Salt) in Beta Thalassemia Intermedia in Thailand (ST20-P2T)

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ClinicalTrials.gov Identifier: NCT01609595
Recruitment Status : Completed
First Posted : June 1, 2012
Last Update Posted : March 13, 2013
Mahidol University
Information provided by (Responsible Party):
Susan P. Perrine, Boston University

Brief Summary:

Beta thalassemia intermedia is an inherited blood disease caused by molecular mutations which reduce the beta globin protein chain of adult hemoglobin A, the protein in red blood cells which carries oxygen throughout the body. Beta thalassemias cause progressively severe anemia, widespread organ damage, and often require blood transfusions. There is no FDA approved therapeutic to treat the underlying cause of beta thalassemia. Fetal hemoglobin is another type of endogenous hemoglobin which can replace the reduced beta globin protein, reduce the anemia, and even abolish transfusion requirements. This type of hemoglobin is normally suppressed in infancy.

Sodium 2,2 dimethylbutyrate (ST20, or HQK-1001) is a small molecule which stimulates production of fetal hemoglobin in nonhuman primates and in human patients in Phase I/II trials.

This is a Phase 2 open-label trial to evaluate the ability of this oral therapeutic to reduce anemia in patients with beta thalassemia intermedia, when administered once daily for 26 weeks. All participants will receive the study drug.

Condition or disease Intervention/treatment Phase
Beta Thalassemia Intermedia Drug: sodium 2,2 dimethylbutyrate Phase 2

Detailed Description:

This trial will:

  1. Determine the proportion of patients in which treatment with the study drug results in an increase in total hemoglobin by 1.5 g/dl above baseline levels when administered for 26 weeks in Thai patients with beta thalassemia intermedia, including Hemoglobin E beta thalassemia.
  2. Determine the number and proportion of participants in whom treatment with the study drug results in an increase in fetal hemoglobin.
  3. Determine the number of participants who have adverse events.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 10 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: An Open Label Academic Phase 2 Study of SDMB in Subjects in Thailand With Beta Thalassemia Intermedia
Study Start Date : March 2012
Actual Primary Completion Date : November 2012
Actual Study Completion Date : December 2012

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Thalassemia

Arm Intervention/treatment
Experimental: Treatment
Study drug treatment
Drug: sodium 2,2 dimethylbutyrate
Oral capsule, dose 20 mg/kg/day, daily, for 26 weeks
Other Name: HQK-1001, ST20

Primary Outcome Measures :
  1. The number of participants in which an increase in total hemoglobin of at least 1.5 g/dl above average baseline occurs with study drug treatment. [ Time Frame: Within 30 weeks, including 26 weeks of dosing with the study drug ]

    Baseline hemoglobin levels will be determined by averaging 2 values prior to administration of the study drug.

    The number of participants in which an increase in total hemoglobin of at least 1.5 g/dL above baseline occurs will be determined.

Secondary Outcome Measures :
  1. The proportion of participants in which an increase in fetal hemoglobin occurs above the subjects' averaged baseline levels. [ Time Frame: Within 30 weeks, including 26 weeks of study drug administration ]
    Tests of fetal hemoglobin will be obtained at two times prior to administration of the study drug and will be averaged. Laboratory tests of fetal hemoglobin will be assessed monthly during the study drug administration for 26 weeks, as a biomarker of drug activity.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 55 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Diagnosis of Beta Thalassemia Intermedia
  • Splenectomized
  • Average of two Hgb levels between 6.0 and 9.0 g/dl

Exclusion Criteria:

  • Red blood cell transfusion within 3 months of study drug initiation
  • Enlarged spleen
  • Use of hydroxyurea within 6 months
  • QT Segment corrected (QTc)> 450 msec (men) or 470 msec (women) on screening ECG
  • Use of iron chelating agents within 7 days of first dose
  • Alanine Transaminase(ALT)> 4 times the upper limit of normal
  • Use of erythropoiesis stimulating agents (ESAs) within 90 days of first dose
  • serum creatinine > 1.5 mg/dL

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 ClinicalTrials.gov identifier (NCT number): NCT01609595

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Mahidol University Thalassemia Research Centre
Nakhonpathom, Thailand
Sponsors and Collaborators
Boston University
Mahidol University
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Principal Investigator: Suthat Fuchareon, MD Thalassemia Research Centre, Mahidol University
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Responsible Party: Susan P. Perrine, Sponsor Investigator, Boston University
ClinicalTrials.gov Identifier: NCT01609595    
Other Study ID Numbers: ST20-P2T
HQK-1001-Thal P2 ( Other Identifier: HemaQuest )
First Posted: June 1, 2012    Key Record Dates
Last Update Posted: March 13, 2013
Last Verified: March 2013
Keywords provided by Susan P. Perrine, Boston University:
Fetal hemoglobin
Additional relevant MeSH terms:
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Anemia, Hemolytic, Congenital
Anemia, Hemolytic
Hematologic Diseases
Genetic Diseases, Inborn