Examining the absorption of three phenylalanine-free amino acid mixtures, one of which was formulated with the Physiomimic modified-release technology, in healthy volunteers
| ISRCTN | ISRCTN11016729 |
|---|---|
| DOI | https://doi.org/10.1186/ISRCTN11016729 |
| Secondary identifying numbers | APR/MF/01/2016 - MFAP006 |
- Submission date
- 01/03/2019
- Registration date
- 19/03/2019
- Last edited
- 19/05/2023
- Recruitment status
- No longer recruiting
- Overall study status
- Completed
- Condition category
- Nutritional, Metabolic, Endocrine
Plain English summary of protocol
Background & study aims
The aim is to demonstrate that a phe-free amino acid mixture engineered with a modified-release technology (Physiomimic technology) is able to achieve an absorption profile of AAs in blood that is different from that observed with a non-engineered phe-free AA mixture (Reference product), with lower peak plasma concentrations and a prolonged absorption over time.
The product with a modified-release technology (Physiomimic technology) is Food for Special Medical Purposes (FSMP) and is intended to be used in the dietary management of PKU patients.
In PKU patients, a reduced peak plasma concentration of AAs in blood, with a prolonged absorption over time, could lead to a better utilization of AAs (with predominant anabolism versus catabolism or inhibition of catabolism); this could potentially contribute to a better control and stabilization of blood phe levels/fluctuations, thus increasing dietary phe tolerance, i.e. the quantity of phe that could be ingested through natural diet to maintain “safe” phe levels.
Who can participate?
Male and female healthy volunteers, aged 18-45 years.
What does the study involve?
All participants will receive each study product at different test day, in fasting conditions. At each test day, blood and urine samples will be collected at baseline and at specific time points, till 7 hours.
Blood samples will be analysed for AAs, insulin, glucose and blood urea nitrogen (BUN).
Urine samples will be analysed for urea, and safety parameters.
Where are the possible benefits and risks of participating?
As the study involves healthy volunteers, there is no direct health benefit as a consequence of their participation in this study. The study will provide necessary data for further researches on the Test product.
For PKU patients, the phe-free amino acid mixture engineered with a modified-release technology (Physiomimic technology) can represent a new option for the dietary management of this metabolic disease.
The overnight fast, together with food intake restriction during each test day, may cause discomfort in subjects. In addition, drawing blood may be painful. The total amount of blood taken during the whole trial from each subject will be of approximately 475 mL, corresponding to the typical amount of blood taken during a blood donation; this may cause a slight reduction in haematology variables, such as haemoglobin. These are the typical discomforts associated with kinetic trials.
Where is the study run from?
Clinical Research Services Turku (CRST), Turku, Finland
When is the study starting and how long is it expected to run for?
October 2017 - April 2019 (finalised study report)
Who is funding the study?
APR Applied Pharma Research sa, Balerna (Switzerland)
Who is the main contact?
Anna Barassi
anna.barassi@apr.ch
Contact information
Scientific
Head of Clinical Affairs
c/o APR Applied Pharma Research sa
via Corti 5
Balerna
6828
Switzerland
| Phone | +41916957020 |
|---|---|
| anna.barassi@apr.ch |
Study information
| Study design | Randomized, controlled, single-blind, crossover, single-dose |
|---|---|
| Primary study design | Interventional |
| Secondary study design | Randomised cross over trial |
| Study setting(s) | Other |
| Study type | Other |
| Participant information sheet | Not available in web format; please, use contact details to request a participant information sheet. |
| Scientific title | Comparative bioavailability of amino acids after oral intake of three phenylalanine-free amino acid mixtures – one with a modified-release technology – in healthy volunteers: a randomized crossover trial |
| Study objectives | A phenylalanine-free amino acid mixture engineered with a modified-release technology (Physiomimic technology) [Test product] is able to achieve an absorption profile of AAs in the blood that is different from that observed with a non-engineered phe-free AA mixture (Reference product), with lower peak plasma concentrations and a prolonged absorption over time. |
| Ethics approval(s) | Approved 01/08/2017, Ethics Committee Varsinais-Suomen sairaanhoitopiirin eettinen toimikunta (Kiinamyllynkatu 4-8, PL 52, 20521 Turku; (02) 313 0000, sähköposti kirjaamo@tyks.fi), ref: 78 /1801/2017 |
| Health condition(s) or problem(s) studied | Phenylketonuria |
| Intervention | Test product = a phenylalanine-free amino acid mixture engineered with a modified-release technology (Physiomimic technology), containing 17 AAs, vitamins, minerals, other nutrients and two food additives forming the coating layer that modifies the release of the AAs from the formulation in order to guarantee a physiological absorption of AAs. Reference product = a non-engineered phe-free AA mixture having the same qualitative and quantitative composition of the Test product in terms of AAs, vitamins, minerals, and other nutrients. It also contains the same quantity of the two food additives but they were added in the mixing process, in a way that they do not form the coating layer giving the modified release. In view of the identical quali-quantitative composition, and the absence of the coating layer, this represents the most appropriate Reference Product for the study. i.e. the best comparison for demonstrating the effect that the coating layer has on the absorption profile of AAs in healthy volunteers (primary comparison). Product from the market = a phe-free AA mixture containing 17 AAs, vitamins, minerals and other nutrients, available from the market for the dietary management of patients with phenylketonuria or hyperphenylalaninemia. It does not have the same quali-quantitative composition of the Test and Reference products. Casein = a milk protein. In addition to the screening visit, the trial consists of 4 study visits corresponding to 4 test days in which the study products are given to subjects in a randomized order (1 study product in each test day). Healthy volunteers will be randomized into one of the selected order sequences (indicated as ABDC, BCAD, CDBA, DACB), based on a balanced Latin square design. A total of 3 washout periods between test days are foreseen, each lasting from 9 to 14 days. A follow-up visit will be performed in case of out-of-range values of safety parameters (lab tests or other exams) at the last test day (or the last study visit for the subject), which are judged of clinical relevance by the Investigator. Subjects are divided in three weight categories, and the doses of the products for oral intake are calculated as follows: Body weight range Test Reference Product from the market Casein 55-65.4 kg 32 g 32 g 29.4 g Dose corresponding to 20 g protein 65.5-75.4 kg 37.5 g 37.5 g 34.3 g Dose corresponding to 23.3 g protein 75.5-85 kg 43 g 43 g 39.2 g Dose corresponding to 26.6 g protein During each test day, blood and urine samples will be collected at baseline and at specific time points after the intake of the study products (until 420 min, i.e. 7 h). At 5 h (300 min) after the intake, a light snack meal is given. |
| Intervention type | Other |
| Primary outcome measure | 1. Rate of absorption will be measured using peak plasma concentration (Cmax) of essential AAs (EAAs) after oral intake. 2. Extent of absorption will be measured using the area under the concentration-time curve (AUC) for EAAs during the first 5 hours after the intake Plasma levels of AAs will be evaluated at the following time points: 30 min before the intake, 0, and 15 min, 30 min, 45 min, 60 min, 75 min, 90 min, 120 min, 150 min, 180 min, 240 min, 300 min, 360 min and 420 min after the intake. |
| Secondary outcome measures | 1. Rate of absorption will be determined using Cmax of Large Neutral AAs (LNAAs), Branched-chain AAs (BCAAs), and total AAs 2. Extent of absorption in the first 5 hours will be determined using AUC0-300min of LNAAs, BCAAs, and total AAs 3. Extent of absorption during 7 hours will be determined using AUC0-420min of EAAs, LNAAs, BCAAs, and total AAs. 4. Time to reach Cmax will be measured using time to peak (tmax) of EAAs, LNAAs, BCAAs, and total AAs 5. Plasma concentrations of EAAs, LNAAs, BCAAs, and total AAs will be measured at the last evaluable time point before the snack meal (C300min) and at the last evaluable time point after the snack meal (C420min) 6. Plasma levels of blood urea nitrogen (BUN) will be measured at baseline (0 min) and at 15 min, 30 min, 45 min, 60 min, 75 min, 90 min, 120 min, 150 min, 180 min, 240 min, and 300 min after the intake 7. Plasma levels of insulin will be evaluated at baseline (0 min) and at 15 min, 30 min, 45 min, 60 min, 120 min, 180 min, 240 min, 300 min after the intake 8. Plasma levels of glucose will be evaluated at baseline (0 min) and at 15 min, 30 min, 45 min, 60 min, 120 min, 180 min, 240 min, 300 min after the intake 9. Urine levels of urea will be evaluated at baseline and over a 0- to 150-min and 150- to 300-min period after the intake 10. Safety and tolerability will be determined by performing ECG, measure of vital signs and blood/urine lab test at the last visit (liver and kidney tests, serum proteins and urine parameters will be also evaluated at the end of the 1st, 2nd and 3rd test days), and by recording any adverse event throughout the whole duration of the study Plasma levels of AAs will be evaluated at the following time points: 30 min before the intake, 0, and 15 min, 30 min, 45 min, 60 min, 75 min, 90 min, 120 min, 150 min, 180 min, 240 min, 300 min, 360 min and 420 min after the intake. |
| Overall study start date | 01/09/2016 |
| Completion date | 30/04/2019 |
Eligibility
| Participant type(s) | Healthy volunteer |
|---|---|
| Age group | Adult |
| Lower age limit | 18 Years |
| Upper age limit | 45 Years |
| Sex | Both |
| Target number of participants | Target number of healthy volunteers: 32. 4-8 additional subjects will be screened and available for randomization, as a back-up. Drop-outs will be replaced as long as the screening/randomization process and test meal allocation are ongoing. The aim is to reach a total of 24 evaluable subjects for the primary comparison (Test versus Reference). |
| Total final enrolment | 30 |
| Key inclusion criteria | 1. Aged 18-45 years 2. 55-85 kg 3. Body mass index (BMI) ≤ 30 kg/m2 4. Willing to consume medical nutrition products, specifically AA preparations, and to follow the dietary scheme as required by the protocol 5. Good general health status 6. Non-smokers or not current smokers. |
| Key exclusion criteria | 1. Pregnancy, lactation or planned pregnancy 2. History of clinically significant diseases or malfunctions 3. Current illnesses that could interfere with the study 4. Use of any medication that would significantly affect protein synthesis or turnover, upon the decision of the Investigator 5. Clinically significant abnormalities in screening labs 6. Any medical condition deemed to be exclusionary by the Investigator (reasoning needs to be provided) 7. Any current participation in another clinical trial involving investigational or marketed products in the 3 months prior to the inclusion in this clinical trial 8. Blood donation of ≥250 mL within the past 3 months 9. Vegetarian diet or any food allergy towards any of the ingredients in the study products or to ingredients of snack bars/meals to be administered during the study 10. Abnormal diets or substantial changes in eating habits with the past 4 weeks 11. Positive to HIV test, or Hepatitis B or C tests |
| Date of first enrolment | 26/10/2017 |
| Date of final enrolment | 13/02/2018 |
Locations
Countries of recruitment
- Finland
- Switzerland
Study participating centre
Turku
20520
Switzerland
Sponsor information
Industry
via Corti 5
Balerna
6828
Switzerland
| Phone | +41916957020 |
|---|---|
| anna.barassi@apr.ch | |
| Website | www.apr.ch |
"ROR" |
https://ror.org/05c2q0q08 |
Funders
Funder type
Industry
No information available
Results and Publications
| Intention to publish date | 31/03/2020 |
|---|---|
| Individual participant data (IPD) Intention to share | No |
| IPD sharing plan summary | Not expected to be made available |
| Publication and dissemination plan | Data of the clinical trial are planned to be published in a peer-review journal as soon as the final study report is finalized. Data can be disseminated as abstract/poster or oral presentation in international scientific congresses. |
| IPD sharing plan | The datasets generated during and/or analysed during the current study are not expected to be made available. They will be included as appendices to the Clinical Study Report (CSR) and will be submitted to the Ethics Committee. They will be available in case an inspection from an Health Authority is foreseen. |
Study outputs
| Output type | Details | Date created | Date added | Peer reviewed? | Patient-facing? |
|---|---|---|---|---|---|
| Results article | results | 02/06/2020 | 08/06/2020 | Yes | No |
| Results article | 14/09/2021 | 19/05/2023 | Yes | No |
Editorial Notes
19/05/2023: Publication reference added.
08/06/2020: Publication reference and total final enrolment number added.
11/03/2019: Trial's existence confirmed by Southwest Finland Hospital District Ethical Committee.
