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Effects of Genistein in Postmenopausal Women With Metabolic Syndrome

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: NCT01664650
Recruitment Status : Completed
First Posted : August 14, 2012
Last Update Posted : August 14, 2012
Ministry of Education, Universities and Research, Italy
Information provided by (Responsible Party):
Francesco Squadrito, University of Messina

Brief Summary:
The 15-25% of the population of developed countries suffers for metabolic syndrome. It is associated with a 2-4 fold increase in cardiovascular morbility and mortality and with a 5- 9 fold increase in developing type II diabetes. MS prevalence increases after the onset of menopause, because of estrogen deficiency. It is still not clear if menopause itself increases the risk of cardiovascular diseases in al women or only in those that develop MS. Many MS patients that show slight modification in cardiovascular and metabolic parameters are not generally pharmacologically treated since diabetes or alteration in the lipid profile are not evidenced. In this respect it is of importance to develop new therapeutic strategies to prevent and treat MS. Genistein (4,5,7-trihydroxyisoflavone), shown a potentially preventive role on the cardiovascular apparatus in post-menopausal women, may be termed as selective ER modulator (SERM), since it reveals both ER-alpha full agonist and ER-beta partial agonist activity.

Condition or disease Intervention/treatment Phase
Metabolic Syndrome Dietary Supplement: Genistein Dietary Supplement: Placebo Phase 2 Phase 3

Detailed Description:
The investigators studied whether genistein may represent an efficacious and safe alternative for reducing vascular risk in postmenopausal women with metabolic syndrome. The clinical study was a randomized, double-blind, placebo-controlled study involving 150 patients with metabolic syndrome. After a 4-week stabilization on a standard fat-reduced diet, participants were randomly assigned to receive either phytoestrogen genistein (54 mg/day) or placebo for 6 months. At baseline and following treatment fasting plasma glucose, insulin, insulin resistance (HOMA-IR), lipid concentrations, plasma total homocysteine, leptin, adiponectin and visfatin were measured. Bioimpedentiometric and nutritional analysis, as well as a safety assessment of the endometrium and vagina were also performed.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 120 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Role of Genistein on Metabolic Syndrome in Post-menopausal Women
Study Start Date : September 2008
Actual Primary Completion Date : November 2010
Actual Study Completion Date : January 2011

Resource links provided by the National Library of Medicine

Drug Information available for: Genistein

Arm Intervention/treatment
Placebo Comparator: Lifestyle counseling
Placebo tablets. All participants were counseled on an moderate hypocaloric, Mediterranean-style diet composed of 25% to 30% energy from fat, less than 10% energy from saturated fatty acids, 55% to 60% energy from carbohydrates, and 15% energy from protein, with a cholesterol intake less than 300 mg/d and fiber intake of 35 g/d or greater.
Dietary Supplement: Placebo
Experimental: Genistein
Genistein 54 mg/day in 2 tablets for 12 months. All participants were counseled on an moderate hypocaloric, Mediterranean-style diet composed of 25% to 30% energy from fat, less than 10% energy from saturated fatty acids, 55% to 60% energy from carbohydrates, and 15% energy from protein, with a cholesterol intake less than 300 mg/d and fiber intake of 35 g/d or greater.
Dietary Supplement: Genistein

Primary Outcome Measures :
  1. homeostasis model assessment for insulin resistance (HOMA-IR) [ Time Frame: change from baseline at 6 and 12 months ]
    HOMA-IR was calculated using the following formula: fasting glucose (mg/dl) X fasting insulin (uIU/ml)/22.5.

Secondary Outcome Measures :
  1. body mass index [ Time Frame: basal, 6 and 12 months ]
    The body mass index (BMI) is calculated by dividing the weight measured in kilograms by the square of the height measured in metres [i.e. BMI = Weight (kg)/ Height (m)]2.

  2. Blood pressure [ Time Frame: basal, 6 and 12 months ]
    Three seated blood pressure measurements were taken on the right arm with a sphygmomanometer after the participant had been resting for at least 5 min. Blood pressure values were based on the average of the second and third measurements.

  3. Metabolic variables [ Time Frame: basal, 6 and 12 months ]
    Fasting glucose and insulin were measured in serum collected after an overnight fast using routine methods. Total cholesterol, High Density Lipoprotein-Cholesterol (HDL-C), and triglycerides were measured by using a routine enzymatic method, and the Low-Density Lipoprotein Cholesterol (LDL-C) level was calculated by using the Friedewald formula: [Total cholesterol (mg/dL) - High Density Lipoprotein-Cholesterol (HDL-C) (mg/dL) - triglycerides (mg/dL)/5].

  4. Inflammatory markers [ Time Frame: basal, 6 and 12 months ]
    Serum visfatin, adiponectin, and homocysteine were measured by using an immunoenzymatic assay was measured by using an immunoenzymatic assay.

  5. Adverse events [ Time Frame: basal, 6 and 12 months ]
    Participants were asked about symptoms at clinic visits every 6 months. Standard clinical evaluations and laboratory analyses, including hematologic, renal, and liver function tests, were done every 6 months. Endometrial thickness was evaluated by using ultrasonography at baseline, 6 months, and 1 year. The endometrial thickness was measured in the sagittal plane from 1 basal layer to the other. If the endometrial thickness was 8 mm or greater or if uterine bleeding occurred, hysteroscopy and endometrial biopsy were performed. All unfavorable and unintended clinical effects were considered adverse effects and were evaluated for severity, duration, seriousness, and relation to the study drug and outcome.

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Ages Eligible for Study:   49 Years to 67 Years   (Adult, Older Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Post-menopausal satus
  • The presence of three or more of the five following criteria:

    1. waist circumference ≥88 cm;
    2. Triglycerides ≥150 mg/dl or on drug treatment for elevated triglycerides;
    3. high-density-lipoprotein (HDL) cholesterol <50 mg/dl or on drug treatment for reduced HDL-C;
    4. Fasting glucose ≥100 mg/dl or on drug treatment for elevated glucose;
    5. Blood pressure ≥130/85 mmHg or on antihypertensive drug treatment in a subject with a history of hypertension.

Exclusion Criteria:

  • clinical or laboratory evidence of confounding systemic diseases (e.g., chronic renal or hepatic failure, chronic inflammatory diseases)
  • cardiovascular disease (CVD) defined as documented myocardial infarction, ischaemic heart disease, coronary heart bypass, coronary angioplasty, cerebral thromboembolism, and peripheral amputations, or by Minnesota codes 1°1-3, 4°1-4, 5°1-3 at a standard ECG performed in the 12 months preceding the study;
  • coagulopathy;
  • use of oral or transdermal estrogen, progestin, androgens, selective estrogen receptor modulators, or other steroids;
  • treatment in the preceding six months with polyunsaturated n-3 fatty acids supplements, non steroidal anti-inflammatory drugs (NSAIDs) or steroids, that would interfere with evaluation of the study medication;
  • smoking habit of more than 2 cigarettes daily.

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): NCT01664650

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University of Magnia Graecia
Catanzaro, Italy
University of Messina
Messina, Italy, 98123
University of Palermo
Palermo, Italy, 90129
Sponsors and Collaborators
University of Messina
Ministry of Education, Universities and Research, Italy
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Principal Investigator: Francesco Squadrito, MD University of Messina

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Responsible Party: Francesco Squadrito, Full Professor of Pharmacology, University of Messina Identifier: NCT01664650     History of Changes
Other Study ID Numbers: 20073XZSR3_003
First Posted: August 14, 2012    Key Record Dates
Last Update Posted: August 14, 2012
Last Verified: August 2012
Keywords provided by Francesco Squadrito, University of Messina:
Additional relevant MeSH terms:
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Insulin Resistance
Estrogens, Non-Steroidal
Metabolic Syndrome
Pathologic Processes
Glucose Metabolism Disorders
Metabolic Diseases
Anticarcinogenic Agents
Protective Agents
Physiological Effects of Drugs
Antineoplastic Agents
Protein Kinase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Hormones, Hormone Substitutes, and Hormone Antagonists