Effect of Green Tea Extract on Arterial Stiffness in Type 2 Diabetes Mellitus

January 23, 2018 updated by: Fernando Grover Paez, Centro Universitario de Ciencias de la Salud, Mexico

Effect of Green Tea Extract Administration on Arterial Stiffness in Patients With Type 2 Diabetes Mellitus

Type 2 diabetes mellitus (T2DM) has become the epidemic of the XXI century. This chronic disease is also highly prevalent and primarily associated with an increased cardiovascular mortality and morbidity due to micro and macrovascular complications, where its pathophysiological mechanism accelerates the formation of the atherosclerotic process, fundamental element associated with arterial stiffness. The importance of anticipating the presence of a cardiovascular event lies precisely in the early detection of subclinical changes in the elastic arteries identified by measuring the pulse wave velocity. Having adequate pharmacological or non-pharmacological interventions that impact precisely in the reduction of pulse wave velocity contributes to a reduction of cardiovascular morbidity and mortality associated with DM2. Among non-pharmacological therapies they have been studied the benefits attributed to the use of green tea infusion either encapsulated or extract have been associated mainly with anti-inflammatory and antioxidant effects. There are both experimental and clinical studies that have shown benefits of administration of green tea (extract or infusion), and administered by different routes at different dosages and for varying times. But it has been noted that not all studies with green tea meet appropriate to draw conclusions about its benefits to cardiovascular level. However, it is proposed that the use of green tea extract with a highest amount of catechins through a controlled clinical trial could be a potential therapeutic strategy for changing hemodynamic alterations and arterial stiffness favorably in this particular group of patients DM2.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The objetive is to evaluate the effect of administration of Green tea exctract on arterial stiffness in individuals with T2DM. The investigators will conduct a double-blind trial, randomized, placebo control group, each group 12 male and female patients of 35-65 years of age with T2DM, with no hypertension or treated with insulins. Randomization will determine who will receive the intervention during 8 week trial (Green tea extract capsule, 400 mg 1 time daily with the first bite of each meal or approved placebo capsules), both groups also will continue with their usual treatment. The clinical findings and laboratory test include a metabolic profile and biosafety, wich will be baseline and at 8 weeks. Body weight, body fat, body mass index (BMI) and blood pressure will be determined during the inicial and final visit, likewise, hemodynamics parameters of arterial stiffness like the aortic pulse wave velocity (PWVao), central pulse pressure (PPao), aortic augmentation index (IAxao) and central systolic blood pressure (cSBP) by an oscillometric monitoring system via BPLab ®. Adverse events and adherence to treatment will be documented. The statistical analysis: Mann-Whitney U Test and Wilcoxon exact test. It is considered with significance at p<0.05.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
24

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

35 years to 65 years (ADULT, OLDER_ADULT)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Diagnosis of T2DM
  • Fasting plasma glucose >126 and <250 mg/dl at the time security
  • Metformin monotherapy or with glibenclamide added
  • Written informed consent

Exclusion Criteria:

  • Hypertention
  • Treated with insulin
  • Use of antioxidant suplements or products with caffeine
  • Woman pregnant or breastfeeding
  • Untreated tyroid disease
  • Total colesterol >400mg/dl
  • Triglycerides >400mg/dl
  • Liver enzimes (alt and ast) more tan twice the normal range
  • Glomerular filtration rate <60ml/min (Cockcroft-Gault)

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: TREATMENT
  • Allocation: RANDOMIZED
  • Interventional Model: PARALLEL
  • Masking: DOUBLE

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
EXPERIMENTAL: Green tea extract
Individuals with T2DM controlled with metformin or glibenclamide, or both; with no hypertension neither treated with insulim
Drug: green tea extract
Green tea extract capsules, 400mg 1 time daily with the first bite of eat meal
Other Names:
  • Sunphenon 90LB
PLACEBO_COMPARATOR: Placebo
Individuals with T2DM controlled with metformin or glibenclamide, or both; with no hypertension neither treated with insulim
Drug: placebo
Placebo capsules, 400mg 1 time daily with the first bite of eat meal
Other Names:
  • Calcined magnesia

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change from Baseline in Aortic Pulse Wave Velocity measured in meters / second, at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention with oscillometric monitoring system via BPLab
baseline and 12 weeks

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change from Baseline in aortic pulse pressure measured in mm / Hg at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention with oscillometric monitoring system via BPLab
baseline and 12 weeks
Change from Baseline in aortic Augmentation index measured in percentage at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention with oscillometric monitoring system via BPLab
baseline and 12 weeks
Change from Baseline in central systolic blood pressure measured in mm / Hg at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention with oscillometric monitoring system via BPLab
baseline and 12 weeks

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change from Baseline in Fasting plasma glucose measured in mg / dL at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention by spectrophotometry
baseline and 12 weeks
Change from Baseline in Total cholesterol measured in mg / dL at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention by spectrophotometry
baseline and 12 weeks
Change from Baseline in Triglycerids measured in mg / dL at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention by spectrophotometry
baseline and 12 weeks
Change from Baseline in High-density lipoprotein colesterol measured in mg / dL at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention by friedewall formula
baseline and 12 weeks
Change from Baseline in Low-density lipoprotein colesterol measured in mg / dL at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention by friedewall formula
baseline and 12 weeks
Change from Baseline in Alanine aminotransferase measured in IU / L at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention by spectrophotometry
baseline and 12 weeks
Change from Baseline in Aspartate aminotransferase measured in IU / L at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention by spectrophotometry
baseline and 12 weeks
Change from Baseline in Creatinine measured in mg / dL at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention by spectrophotometry
baseline and 12 weeks
Change from Baseline in Peripheral systolic blood pressure measured in mg / dL at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention using a digital baumanometer
baseline and 12 weeks
Change from Baseline in Peripheral diastolic blood pressure measured in mg / dL at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention using a digital baumanometer
baseline and 12 weeks
Change from Baseline in Body and visceral fat measured in centimeters ^ 2 at 12 weeks
Time Frame: baseline and 12 weeks
Before and after intervention using an impedance bascula, Dualscan HDS-2000
baseline and 12 weeks

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Centro Universitario de Ciencias de la Salud, Mexico

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

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 1, 2016

Primary Completion (ACTUAL)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 1, 2016

Study Completion (ACTUAL)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2016

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 3, 2015

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 10, 2015

First Posted (ESTIMATE)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 11, 2015

Study Record Updates

Last Update Posted (ACTUAL)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 25, 2018

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 23, 2018

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2018

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • CUCS-INTEC-MV-TEVE-001

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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