Bioavailability of the Microconstituents of Natural Chios Mastiha in Healthy Adults.

June 15, 2021 updated by: Andriana C Kaliora, Harokopio University

A Bioavailability Study of the Natural Chios Mastiha in Blood and Urine Samples of Healthy Adults.

Mastiha is a natural product from the tree Pistacia lentiscus var. Chia (Anacardiaceae) growing exclusively in the Southern part of Chios Island. It is the natural resinous exudate produced after longitudinal incisions made at close intervals from the base of the trunk up to the thicker branches of the tree. U.S. Food and Drug Administration has classified Mastiha as GRAS. Previous research demonstrates Mastiha's safety, as well as anti-inflammatory, antimicrobial and antioxidant properties. In addition, the European Medicine Agency has recently recognized Mastiha as a natural medicine and classified it to the category of traditional herbal medicines in diarrhea problems, mild dyspeptic disorders, skin inflammation and healing (EMA/HMPC/46758/2015).

However, the bioavailability of its microconstituents in human biological samples is still undetermined. To this end, the current study aims to investigate the whether Mastiha's compounds are bioavailable in healthy adults. Twenty apparently healthy men, aged 20-40 years old, will be enrolled based on certain inclusion and exclusion criteria. The staff of the study will provide detailed information regarding the aims, the methods, anticipated benefits and potential hazards of the study and all patients will receive the Patient Information Leaflet (PIL). Ample time (48 hours) will be provided in order to decide whether they want to participate in the protocol. Each patient agreeing to participate will sign an Informed Consent document and the staff will explain to patients that they are under no obligation to enter the trial and that they can withdraw at any time during the trial, without having to give a reason. A copy of the signed Informed Consent will be given to the participant.

After enrollment, the volunteers will undergo a medical and dietary assessment and their health status will be evaluated through a complete blood count. Then, they will follow a low-phytochemical diet for five days, meaning that they will exclude fruits, vegetables, legumes, coffee, tea, alcoholic beverages and chocolate. On the day of the experiment and after overnight fasting, the volunteers will consume 10g of natural Mastiha and blood samples will be obtained on timepoints 0h, 30min, 1h, 2h, 4h, 6h and 24h after Mastiha intake. Until timepoint 6h, they will be allowed to consume only water. Urine samples will also be collected on timepoints 0h, 4h, 8h and 24h.

After collection, the phenolic and terpenoid content or metabolites of Mastiha will be identified in plasma samples applying LC-HRMS. Additionally, the metabolomic profile will be assessed in plasma samples with LC-HRMS and in urine samples with NMR-based metabolomics. Oxidative stress will be evaluated through the CuSO4 technique and oxidised LDL levels in serum samples, as well as F-2 isoprostanes in urine samples.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

20

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Greece
      • Athens, Greece, 17671
        • Harokopio University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

20 years to 40 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Description

Inclusion Criteria:

  • Age: 20-40 years old
  • BMI: 18.5-24.9 kg/m2

Exclusion Criteria:

  • BMI > 25 kg/m2
  • Alcohol or drug abuse
  • Medication, vitamin or inorganic supplements
  • Vegan or macrobiotic diet before and during the study
  • Gastrointestinal diseases, such as IBD, peptic ulcer or GI cancer

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Other
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: Mastiha
Other: Mastiha
The volunteers will follow a low-phytochemical diet for five days, meaning that they will exclude fruits, vegetables, legumes, coffee, tea, alcoholic beverages and chocolate. On the day of the experiment and after overnight fasting, the volunteers will consume 10g of natural Mastiha and blood samples will be obtained on timepoints 0h, 30min, 1h, 2h, 4h, 6h and 24h after Mastiha intake. Until timepoint 6h, will be allowed to consume only water. Urine samples will also be collected on timepoints 0h, 4h, 8h and 24h.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Phenolic and terpenoid content or metabolites of Mastiha identification
Time Frame: The phenolic and terpenoid content or metabolites of Mastiha will be identified in plasma samples applying LC-HRMS. Data will be presented through study completion, an average of 1 year.
The phenolic and terpenoid content or metabolites of Mastiha will be identified in plasma samples applying LC-HRMS. Data will be presented through study completion, an average of 1 year.
Targeted and untargeted metabolic profile assessment
Time Frame: Plasma metabolites assessment with GC-MS, LC-HRMS and urine metabolites assessment with NMR will take place . Data will be presented through study completion, an average of 1 year.
Plasma metabolites assessment with GC-MS, LC-HRMS and urine metabolites assessment with NMR will take place . Data will be presented through study completion, an average of 1 year.

Secondary Outcome Measures

Outcome Measure
Time Frame
Oxidative stress assessment
Time Frame: Serum resistance to oxidation will be assessed through the CuSO4 technique, oxidised LDL levels and uric acid levels. F-2 isoprostanes determination will take place in urine samples. Data will be presented through study completion, an average of 1 year.
Serum resistance to oxidation will be assessed through the CuSO4 technique, oxidised LDL levels and uric acid levels. F-2 isoprostanes determination will take place in urine samples. Data will be presented through study completion, an average of 1 year.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Harokopio University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 1, 2016

Primary Completion (Actual)

February 1, 2017

Study Completion (Actual)

March 10, 2021

Study Registration Dates

First Submitted

July 25, 2016

First Submitted That Met QC Criteria

July 27, 2016

First Posted (Estimate)

July 28, 2016

Study Record Updates

Last Update Posted (Actual)

June 21, 2021

Last Update Submitted That Met QC Criteria

June 15, 2021

Last Verified

June 1, 2021

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • Mastiha BIO-GR (304)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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