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PK and PD Responses to Oral L-Citrulline in Patients With Sickle Cell Disease

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: NCT00343954
Recruitment Status : Unknown
Verified June 2006 by Angiogenix.
Recruitment status was:  Not yet recruiting
First Posted : June 23, 2006
Last Update Posted : June 23, 2006
Information provided by:

Brief Summary:
To evaluate PK and PD responses to L-citrulline given orally for four weeks to patients with sickle cell disease who are otherwise healthy.

Condition or disease Intervention/treatment Phase
Sickle Cell Disease Drug: L-citrulline tablets, 1000 mg Phase 1

Detailed Description:

Phase 1, single center, open label, multiple-dose study consisting of a screening period followed by four weeks of treatment. At least 12 male and female patients, 10 years of age or older, with sickle cell disease but otherwise healthy, will be enrolled in the study.

PK measurements include plasma concentrations of L-citrulline, L-arginine, L-ornithine, and L-proline following the first dose of orally administered L-citrulline and after four weeks of twice daily administration of the drug.

PD measurements include intercellular and vascular adhesion molecules (ICAM, VCAM, and E-selectin), surrogate markers of sickle cell disease activity, and PAT, a measurement of vascular function.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 12 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Phase 1 Pharmacokinetic and Pharmacodynamic Responses to Oral L-Citrulline in Patients With Sickle Cell Disease

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. PK and PD responses to L-citrulline
  2. Endpoints will be determined as change from baseline

Secondary Outcome Measures :
  1. Assessment of safety and tolerability of L-citrulline,

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:   10 Years and older   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Male or female, 10 years of age or older on the day of dosing, and generally healthy as determined by medical history, physical examination, and laboratory test values
  2. Diagnosis of sickle cell anemia (Hb SS)
  3. For female of child-bearing potential, a negative serum pregnancy test and using an adequate method of contraception
  4. Has signed and received a copy of the written informed consent form approved by the investigator's Institutional Review Board (IRB), understands the purposes and risks of the study and agrees to follow the restrictions and schedule of procedures as defined by this protocol

Exclusion Criteria:

  1. History of sickle-cell-related pain crisis within two weeks of study
  2. Pregnant or breast feeding
  3. Transfusion within last 90 days
  4. Creatinine >1.5 X upper limit of normal
  5. SGPT > 2 X upper limit of normal
  6. History of allergic reaction to arginine or citrulline product
  7. Requires chronic medication other than study drug that cannot be discontinued during the study period
  8. Unable to take or tolerate oral medications
  9. Unreliable venous access
  10. Noncompliant with regular care
  11. Participation in an investigational drug or medical device study within previous 30 days
  12. In the opinion of the investigator is not a good candidate for participation in the study

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): NCT00343954

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United States, Pennsylvania
Children's Hospital of Pittsburgh of the University of Pittsburgh Medical Center Health System
Pittsburgh, Pennsylvania, United States, 15213
Contact: Lakshmanan Krishnamurti, MD    412-692-7192      
Contact: Sidney Morris, PhD    (412) 648-9338      
Sponsors and Collaborators
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Principal Investigator: Lakshmanam Krishnamurti, MD Children's Hospital of Pittsburgh, Univ. of Pittsburgh Medical Center
Layout table for additonal information Identifier: NCT00343954    
Other Study ID Numbers: ANGX-3227-01
First Posted: June 23, 2006    Key Record Dates
Last Update Posted: June 23, 2006
Last Verified: June 2006
Keywords provided by Angiogenix:
sickle cell disease
Additional relevant MeSH terms:
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Anemia, Sickle Cell
Anemia, Hemolytic, Congenital
Anemia, Hemolytic
Hematologic Diseases
Genetic Diseases, Inborn