Use of Hydroxyurea and Magnesium Pidolate for Treatment of Sickle Cell Disease

Anemia, Sickle Cell Clinical Trial

Official title:

Phase I Study of Combination Treatment With Hydroxyurea and Magnesium Pidolate in Patients With Sickle Cell Disease

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00143572
• Other study ID #: HUMG1
• Status: Completed
• Phase: Phase 1
• First received: September 1, 2005
• Last updated: April 24, 2017
• Start date: November 2004
• Est. completion date: January 2008

Study information

• Verified date: February 2010
• Source: St. Jude Children's Research Hospital
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The purpose of this study is to estimate the MTD of Mg pidolate in combination with HU in patients with sickle cell disease who have been on a therapeutic dose (15-30 mg/kg/day) of HU for at least 6 months.

Description:

This is a Phase I clinical trial evaluating the combination of hydroxyurea and magnesium pidolate for patients with sickle cell disease with either hemoglobin SS disease or hemoglobin S beta thalassemia. Hydroxyurea and magnesium pidolate will be tested in pediatric and adolescent patients with sickle cell disease who already have been treated with hydroxyurea for a minimum of six months. Magnesium pidolate will be given in combination with hydroxyurea for six months. In successive small groups of patients, the dose of magnesium will be increased in order to eventually determine the maximum tolerated dose (MTD) and dose limiting toxicity (DLT) for magnesium when given in combination with hydroxyurea. The maximum tolerated dose is the highest drug dose that can be given safely to participants. The dose limiting toxicity is determined when drug side effects prevent an increase in dose.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 16
• Est. completion date: January 2008
• Est. primary completion date: January 2008
• Accepts healthy volunteers: No
• Gender: All
• Age group: 3 Years to 15 Years

Eligibility

Inclusion Criteria:

1. Age > 3 years and < 15 years at the time of study enrollment

2. Diagnosis of Hb SS or Hb S beta thalassemia

3. Hydroxyurea treatment for at least 6 months prior to study entry at dose of 15 - 30 mg/kg/day

4. Compliance with taking HU treatment of at least 70 % for 6 months prior to study entry

Exclusion Criteria:

1. Red blood cell transfusion within the last 3 months resulting in a level of Hb A of 10% or more

2. Pregnancy or unwillingness to use effective birth control in sexually active subjects (females who state that they are sexually active)

3. Renal dysfunction defined by a serum creatinine greater than 1.5 times the upper limit of normal for age

4. Liver dysfunction defined by an ALT greater than twice the upper limit of normal for age

5. Concomitant usage of an "antisickling" agent other than hydroxyurea

6. Current use of Mg containing drugs

7. Iron deficiency, defined by serum ferritin = 10 ng/ml

8. Concomitant chronic illness other than sickle cell anemia

Related Conditions & MeSH terms

• Anemia, Sickle Cell

Intervention

Drug:
• Magnesium Pidolate, Hydroxyurea
Intervention Description: Mg pidolate in combination with HU in patients with sickle cell disease who have been on a therapeutic dose (15-30 mg/kg/day) of HU for at least 6 months. Mg pidolate will be given at an initial dose of 0.6 mEq/kg/day divided into 2 daily doses for the first cohort of patients. This dose will be escalated for the subsequent patient cohorts as defined by a classic Phase I design (according to toxicity).

Locations

Country	Name	City	State
United States	St. Jude Children's Research Hospital	Memphis	Tennessee

Sponsors (1)

Lead Sponsor	Collaborator
St. Jude Children's Research Hospital

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	To estimate the maximum tolerated dose of magnesium pidolate in combination with hydroxyurea in patients with sickle cell disease who have been on a therapeutic dose of hydroxyurea for at least six months.		Every 2 weeks for first 8 weeks; then every 4 weeks
Secondary	To document the toxicity of the combination of hydroxyurea and magnesium pidolate.		Every 2 weeks for first 8 weeks; then every 4 weeks
Secondary	To investigate the effect of the combination of hydroxyurea and magnesium on hematological parameters and red cell metabolism.		3 months, 6 months, and 9 months

External Links

•   St. Jude Children's Research Hospital