Efficacy, Tolerability, PK of OZ439 in Adults With Acute, Uncomplicated P.Falciparum or Vivax Malaria Mono-infection

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: NCT01213966
Recruitment Status : Completed
First Posted : October 4, 2010
Results First Posted : November 18, 2014
Last Update Posted : December 3, 2014
Mahidol University
Information provided by (Responsible Party):
Medicines for Malaria Venture

Brief Summary:
A Phase IIa Exploratory, Open label, Single Dose Regimen, Multiple Dose Testing Clinical Study to Assess the Preliminary Efficacy, Tolerability and Pharmacokinetics of OZ439 in adult patients with acute, uncomplicated Plasmodium falciparum or vivax malaria mono-infection.

Condition or disease Intervention/treatment Phase
Malaria, Falciparum Malaria, Vivax Drug: OZ439 Phase 2

Detailed Description:

This exploratory Phase IIa study aims to investigate the preliminary efficacy in terms of parasite reduction and clearance in malaria patients, and the tolerability of OZ439 administered as single dose regimen at 3 different doses in parallel cohorts of patients with either acute uncomplicated Plasmodium falciparum or Plasmodium vivax malaria mono-infection (10 patients per plasmodium species per dose level).

Treatment with OZ439 will be given as a single dose on Day 0, starting in the first cohort at a dose of 800 mg. Established antimalarial therapy will be given at the latest at 36 hours post dosing.

The primary endpoint will be the derived parasite reduction rate (PRR) at 24 hours after study drug administration.

A review of each individual study cohort (dose/species) will be conducted with the Principal Investigator and the Sponsor and a decision will be reached on whether the dose for the next cohort should increase or decrease (within 200mg-1600mg range). This decision will be based on parasite reduction rate over the first 24 hours following administration of OZ439, tolerability and exposure.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 82 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Phase IIa Exploratory, Open Label, Single/Multiple Dose Testing Clinical Study to Assess the Preliminary Efficacy, Tolerability and PK of OZ439 in Adult Patients With Acute, Uncomplicated P. Falciparum or Vivax Malaria Mono-infection
Study Start Date : October 2010
Actual Primary Completion Date : May 2012
Actual Study Completion Date : May 2012

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Malaria

Arm Intervention/treatment
Experimental: 800 mg OZ439 po single dose
800 mg OZ439 po single dose
Drug: OZ439
po, single dose
Other Name: Artefenomel

Experimental: 400 mg OZ439 p.o. single dose
400 mg OZ439 p.o. single dose
Drug: OZ439
po, single dose
Other Name: Artefenomel

Experimental: 200mg OZ439 p.o. single dose
200mg OZ439 p.o. single dose
Drug: OZ439
po, single dose
Other Name: Artefenomel

Experimental: 1200 mg OZ439 po single dose
1200 mg OZ439 po single dose
Drug: OZ439
po, single dose
Other Name: Artefenomel

Primary Outcome Measures :
  1. Derived Parasite Reduction Rate at 24 Hours (PPR24) [ Time Frame: 24 hours after study drug administration ]

    PRR24 is the log10 change in parasitemia over 24 hours estimated from a regression model fit separately for each patient. The relationship between parasite counts and time was analyzed by fitting a variable lag phase, then a linear decline to the natural log of parasite count versus time relationship. The slope of this log linear relationship is the primary end-point.

    The time points chosen for the regression are those that yield the highest degree of significance when assessing the regression when the number of time points are greater than or equal to 3. No extrapolation was performed.

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Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Male or female patients between the age of 18 and 60 years, inclusive
  2. Body weight between 40 kg and 90 kg inclusive
  3. Presence of mono-infection of P. falciparum or P. vivax confirmed by:

    • Fever, as defined by axillary temperature ≥ 37.5°C or oral/rectal/tympanic temperature ≥ 38°C, or history of fever in the previous 24 hours (history of fever must be documented) and,
    • Microscopically confirmed parasite infection, 5,000 to 50,000 asexual parasite count/µl of blood
  4. Written informed consent, in accordance with local practice, provided by patient. If the patient is unable to write, witnessed consent is permitted according to local ethical considerations
  5. Ability to swallow oral medication
  6. Ability and willingness to participate and access the health facility
  7. Agree to minimum of 4 days hospitalisation for drug administration and pharmacokinetic sampling

Exclusion Criteria:

  1. Patients with signs and symptoms of severe/complicated malaria requiring parenteral treatment according to the World Health Organisation Criteria 2010 (Attachment 2)
  2. Mixed Plasmodium infection
  3. Severe vomiting, defined as more than three times in the 24 hours prior to inclusion in the study or inability to tolerate oral treatment, or severe diarrhoea defined as 3 or more watery stools per day
  4. Presence of other serious or chronic clinical condition requiring hospitalisation.
  5. Severe malnutrition (defined as the weight-for-height being below -3 standard deviation or less than 70% of median of the NCHS/WHO normalised reference values).
  6. Known history or evidence of clinically significant disorders such as cardiovascular (including arrhythmia, QTc interval greater than or equal to 450 msec), respiratory (including active tuberculosis), history of jaundice, hepatic, renal, gastrointestinal, immunological (including active HIV-AIDS), neurological (including auditory), endocrine, infectious, malignancy, psychiatric, history of convulsions or other abnormality (including head trauma).
  7. Known history of hypersensitivity, allergic or adverse reactions to artemisinin containing compounds or mefloquine or drug in the national guidelines for P. vivax.
  8. Known active Hepatitis A IgM (HAV-IgM), Hepatitis B surface antigen (HBsAg) or Hepatitis C antibody (HCV Ab).
  9. Have received any antimalarial treatment in the preceding 14 days, as determined by history and screening test.
  10. Have received antibacterial with known antimalarial activity in the preceding 14 days.
  11. Have received an investigational drug within the past 4 weeks.
  12. Liver function tests (ASAT/ALAT levels) more than 2 x ULN
  13. Hb level below 10 g/dL.
  14. Bilirubin levels greater than 40 µmol/L.
  15. Serum creatinine levels more than 2 times the upper limit of normal range in absence of dehydration. In case of important dehydration the creatinine should be lower than 2X ULN after oral/parenteral rehydration.
  16. Female patients must be neither pregnant (as demonstrated by a negative serum pregnancy test) nor lactating, and must be willing to take measures not to become pregnant during the study period and safety follow-up period

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): NCT01213966

Sponsors and Collaborators
Medicines for Malaria Venture
Mahidol University
Principal Investigator: Sasithon Pukrittayakamee, MD Mahidol University

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Medicines for Malaria Venture Identifier: NCT01213966     History of Changes
Other Study ID Numbers: MMV_OZ439_10_002
First Posted: October 4, 2010    Key Record Dates
Results First Posted: November 18, 2014
Last Update Posted: December 3, 2014
Last Verified: November 2014

Keywords provided by Medicines for Malaria Venture:
Acute uncomplicated Plasmodium Falciparum malaria
Blood stage Plasmodium Vivax malaria

Additional relevant MeSH terms:
Malaria, Vivax
Malaria, Falciparum
Protozoan Infections
Parasitic Diseases