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Safety and Pharmacokinetics of Oral PRX-112 in Gaucher Disease Patients

Primary Purpose

Gaucher Disease

Status
Completed
Phase
Phase 1
Locations
Israel
Study Type
Interventional
Intervention
PRX-112
Sponsored by
Protalix
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Gaucher Disease focused on measuring Gaucher disease, human glucocerebrosidase, plant recombinant human glucocerebrosidase

Eligibility Criteria

18 Years - undefined (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria:

  • Males and females, 18 years or older.
  • Historical diagnosis of Gaucher disease with leukocyte GCD activity level ≤3 nmol/mg*hr (≤30 % of the mean activity of the reference range)
  • Subjects who have not received enzyme replacement therapy (ERT) or substrate replacement therapy (SRT) in the past or patients who have not received ERT in the past twelve months
  • Body Mass Index (BMI) 19 to 25 kg/m2 (inclusive).
  • Non-smoking (by declaration) for a period of at least 6 months prior to screening visit.
  • Subjects in generally good health in the opinion of the investigator as determined by medical history, vital signs and a physical examination.
  • Negative hepatitis B or hepatitis C serology tests at screening.
  • Ability to provide a written informed consent
  • Female subjects of child-bearing potential or male subjects with female partners of child-bearing potential must agree to use two methods of contraception, one of which must be a barrier method. Acceptable methods of contraception include hormonal products, intrauterine device, or male or female condoms.

Exclusion Criteria:

  • Presence of any co-morbidity other than Gaucher Disease
  • Presence of any GIT disease or symptomatology suspected to be GIT related using a study specific GI questionnaire
  • Subjects with any history of allergic response to drugs or other allergies deemed clinically significant or exclusionary for the study, including known food allergies
  • History of alcohol or drug abuse
  • Subjects who donated blood in the three months, or received blood or plasma derivatives in the six months, preceding study drug administration.
  • Use of any investigational drug at screening or within 3 months of dosing.
  • Subjects with an inability to communicate well with the investigators and study staff (i.e., language problem, poor mental development or impaired cerebral function).
  • Subjects who are non-cooperative or unwilling to sign the consent form.
  • Pregnant or nursing or planning to be pregnant during the study period.
  • Have used any medication (excluding paracetamol), within 7 days of study drug administration including laxatives or other drugs, teas or food additives known to be used to treat constipation or diarrhea.
  • Presence of any medical, emotional, behavioral or psychological condition that in the judgment of the investigator would interfere with the subject's compliance with the requirements of the study.

Sites / Locations

  • Rambam Medical Center
  • Shaare Zedek Medical Center

Arms of the Study

Arm 1

Arm Type

Experimental

Arm Label

PRX-112

Arm Description

250 mL of resuspended carrot cells administered orally in a vehicle

Outcomes

Primary Outcome Measures

Adverse Events
Spontaneous reports of adverse events, or events identified during physical examination or clinical laboratory testing

Secondary Outcome Measures

Area Under the Curve (AUC)
Area under the GCD level curve 0-30 hours (AUC0-30h)
Maximum Concentration (Cmax)
Time of maximum prGCD concentration (Tmax)

Full Information

First Posted
December 5, 2012
Last Updated
April 4, 2014
Sponsor
Protalix
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1. Study Identification

Unique Protocol Identification Number
NCT01747980
Brief Title
Safety and Pharmacokinetics of Oral PRX-112 in Gaucher Disease Patients
Official Title
An Exploratory, Open-label Study to Evaluate the Safety of PRX-112 and Pharmacokinetics of Oral prGCD (Plant Recombinant Human Glucocerebrosidase) in Gaucher Patients
Study Type
Interventional

2. Study Status

Record Verification Date
April 2014
Overall Recruitment Status
Completed
Study Start Date
March 2013 (undefined)
Primary Completion Date
January 2014 (Actual)
Study Completion Date
March 2014 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Protalix

4. Oversight

Data Monitoring Committee
No

5. Study Description

Brief Summary
Absorption of therapeutic proteins taken orally has remained the major hurdle for treatment in humans. The proteins are generally degraded by enzymes in the stomach and intestine and the intestine lining that prevents absorption into the circulation. Administration of PRX-112, a plant recombinant human glucocerebrosidase (prGCD) using plant cells as carrier vehicle, may help overcome many of these hurdles. The plant cell wall protects the protein from degradation in its transport through the upper GI and allows release in the lower intestine. Studies in animals have shown that prGCD delivered in this way can be found in the blood stream in an active form.
Detailed Description
This exploratory, open-label safety and pharmacokinetic (PK) study is designed to assess the delivery of prGCD after oral administration of PRX-112 in Gaucher subjects. Subjects will receive an oral dose of PRX-112 in a single administration and followed by 3 consecutive daily administrations at the same dose. prGCD levels in plasma will be determined at selected time points. Safety parameters will also be assessed at selected time points. Enrollment will proceed into the next dosage cohort after the pharmacokinetic and safety data of the previous cohort have been reviewed. A different dosage may be selected based on the pharmacokinetic results of the first cohort.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Gaucher Disease
Keywords
Gaucher disease, human glucocerebrosidase, plant recombinant human glucocerebrosidase

7. Study Design

Primary Purpose
Treatment
Study Phase
Phase 1
Interventional Study Model
Single Group Assignment
Masking
None (Open Label)
Allocation
N/A
Enrollment
16 (Actual)

8. Arms, Groups, and Interventions

Arm Title
PRX-112
Arm Type
Experimental
Arm Description
250 mL of resuspended carrot cells administered orally in a vehicle
Intervention Type
Drug
Intervention Name(s)
PRX-112
Other Intervention Name(s)
plant expressed recombinant human glucocerebrosidase
Intervention Description
Single dose level, four doses per cohort
Primary Outcome Measure Information:
Title
Adverse Events
Description
Spontaneous reports of adverse events, or events identified during physical examination or clinical laboratory testing
Time Frame
3 days after the last dose
Secondary Outcome Measure Information:
Title
Area Under the Curve (AUC)
Description
Area under the GCD level curve 0-30 hours (AUC0-30h)
Time Frame
From start of infusion to 30 hours after infusion
Title
Maximum Concentration (Cmax)
Time Frame
From start of infusion to 30 hours after infusion
Title
Time of maximum prGCD concentration (Tmax)
Time Frame
From start of infusion to 30 hours after infusion

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: Males and females, 18 years or older. Historical diagnosis of Gaucher disease with leukocyte GCD activity level ≤3 nmol/mg*hr (≤30 % of the mean activity of the reference range) Subjects who have not received enzyme replacement therapy (ERT) or substrate replacement therapy (SRT) in the past or patients who have not received ERT in the past twelve months Body Mass Index (BMI) 19 to 25 kg/m2 (inclusive). Non-smoking (by declaration) for a period of at least 6 months prior to screening visit. Subjects in generally good health in the opinion of the investigator as determined by medical history, vital signs and a physical examination. Negative hepatitis B or hepatitis C serology tests at screening. Ability to provide a written informed consent Female subjects of child-bearing potential or male subjects with female partners of child-bearing potential must agree to use two methods of contraception, one of which must be a barrier method. Acceptable methods of contraception include hormonal products, intrauterine device, or male or female condoms. Exclusion Criteria: Presence of any co-morbidity other than Gaucher Disease Presence of any GIT disease or symptomatology suspected to be GIT related using a study specific GI questionnaire Subjects with any history of allergic response to drugs or other allergies deemed clinically significant or exclusionary for the study, including known food allergies History of alcohol or drug abuse Subjects who donated blood in the three months, or received blood or plasma derivatives in the six months, preceding study drug administration. Use of any investigational drug at screening or within 3 months of dosing. Subjects with an inability to communicate well with the investigators and study staff (i.e., language problem, poor mental development or impaired cerebral function). Subjects who are non-cooperative or unwilling to sign the consent form. Pregnant or nursing or planning to be pregnant during the study period. Have used any medication (excluding paracetamol), within 7 days of study drug administration including laxatives or other drugs, teas or food additives known to be used to treat constipation or diarrhea. Presence of any medical, emotional, behavioral or psychological condition that in the judgment of the investigator would interfere with the subject's compliance with the requirements of the study.
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Einat Almon, PhD
Organizational Affiliation
Protalix Ltd.
Official's Role
Study Chair
Facility Information:
Facility Name
Rambam Medical Center
City
Haifa
ZIP/Postal Code
31096
Country
Israel
Facility Name
Shaare Zedek Medical Center
City
Jerusalem
ZIP/Postal Code
91031
Country
Israel

12. IPD Sharing Statement

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Safety and Pharmacokinetics of Oral PRX-112 in Gaucher Disease Patients

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