Clinical trial NCT01270737: Whole Soy and Daidzein on Reduction of Blood Pressure in Postmenopausal Chinese Women
Official title: A Double-blind Randomized Controlled Trial on Whole Soy and Daidzein Supplementation on Reduction of Blood Pressure in Prehypertensive Postmenopausal Chinese Women
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Hypertension
Lead sponsor: Chinese University of Hong Kong
Sponsor class: OTHER
First posted: 2011-01-05
Enrollment: 270
Sex: FEMALE
Minimum age (years): 48
Maximum age (years): 70
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: The investigators hypothesize that whole soy or purified daidzein alone could reduce blood pressure and CVD risks in equol-producing menopausal Chinese women.

Detailed description: Hypertension is an important risk factor for cardiovascular diseases. Substantial evidence has also shown that prehypertension \[systolic blood pressure (BP) 120-139 mm Hg or diastolic BP 80-89 mm Hg\] is the strongest predictor of incident hypertension and is associated with elevated risk of cardiovascular diseases. Thus, prehypertension and its progression to hypertension have enormous public health implications. Soybean contains many beneficial components, among which isoflavones have received most research attention. Recently researchers have investigated their influences on vascular functions but only a handful of studies have focused on BP reduction as the primary outcome.The role of whole soy or daidzein on BP is yet unclear.

The investigators hypothesize that whole soy (soy flour) or purified daidzein alone could reduce BP,and decrease CVD risks in menopausal women with prehypertension or initial untreated hypertension. The investigators propose to perform a 24-week double-blind, randomized, placebo-controlled trial in postmenopausal women with prehypertension or stage 1 hypertension. The primary objective is to verify if whole soy (soy flour) or purified daidzein alone has anti-hypertensive effects at a dosage of habitual high soy intake.

Eligibility criteria: Inclusion Criteria:

* Postmenopausal Chinese women with prehypertension or stage 1 hypertension

Exclusion Criteria:

* Medical treatment for blood pressure or lipids reduction hormones replacement therapy in recent 3 months, chronic renal or hepatic diseases

Primary outcomes:
measure: 24 hours blood pressure
timeFrame: 1 year
Secondary outcomes:
measure: Cardiovascular Disease (CVD) risks
timeFrame: 1 year
Other outcomes:
Locations:
city: Hong Kong
country: China
facility: Center of Research and Promotion of Women's Health
Study officials:
affiliation: Chinese University of Hong Kong
name: Suzanne C Ho, Professor
role: PRINCIPAL_INVESTIGATOR
References:
citation: Liu ZM, Chen B, Li S, Li G, Zhang D, Ho SC, Chen YM, Ma J, Qi H, Ling WH. Effect of whole soy and isoflavones daidzein on bone turnover and inflammatory markers: a 6-month double-blind, randomized controlled trial in Chinese postmenopausal women who are equol producers. Ther Adv Endocrinol Metab. 2020 Jun 18;11:2042018820920555. doi: 10.1177/2042018820920555. eCollection 2020.
citation: Liu ZM, Li G, Zhang D, Ho SC, Chen YM, Ma J, Huang Q, Li S, Ling WH. Effect of whole soy and purified daidzein on androgenic hormones in chinese equol-producing post-menopausal women: a six-month randomised, double-blinded and Placebo-Controlled trial. Int J Food Sci Nutr. 2020 Aug;71(5):644-652. doi: 10.1080/09637486.2020.1712682. Epub 2020 Jan 9.
citation: Liu ZM, Ho SC, Chen YM, Tomlinson B, Ho S, To K, Woo J. Effect of whole soy and purified daidzein on ambulatory blood pressure and endothelial function--a 6-month double-blind, randomized controlled trial among Chinese postmenopausal women with prehypertension. Eur J Clin Nutr. 2015 Oct;69(10):1161-8. doi: 10.1038/ejcn.2015.24. Epub 2015 Mar 18.
citation: Liu ZM, Ho SC, Chen YM, Tang N, Woo J. Effect of whole soy and purified isoflavone daidzein on renal function--a 6-month randomized controlled trial in equol-producing postmenopausal women with prehypertension. Clin Biochem. 2014 Sep;47(13-14):1250-6. doi: 10.1016/j.clinbiochem.2014.05.054. Epub 2014 May 27.
citation: Liu ZM, Ho CS, Chen YM, Woo J. Can soy intake affect serum uric acid level? Pooled analysis from two 6-month randomized controlled trials among Chinese postmenopausal women with prediabetes or prehypertension. Eur J Nutr. 2015 Feb;54(1):51-8. doi: 10.1007/s00394-014-0684-1.
citation: Liu ZM, Ho SC, Chen YM, Ho S, To K, Tomlinson B, Woo J. Whole soy, but not purified daidzein, had a favorable effect on improvement of cardiovascular risks: a 6-month randomized, double-blind, and placebo-controlled trial in equol-producing postmenopausal women. Mol Nutr Food Res. 2014 Apr;58(4):709-17. doi: 10.1002/mnfr.201300499. Epub 2013 Nov 24.
citation: Liu ZM, Ho SC, Woo J, Chen YM, Wong C. Randomized controlled trial of whole soy and isoflavone daidzein on menopausal symptoms in equol-producing Chinese postmenopausal women. Menopause. 2014 Jun;21(6):653-60. doi: 10.1097/GME.0000000000000102.
citation: Liu ZM, Ho SC, Chen YM, Woo J. A six-month randomized controlled trial of whole soy and isoflavones daidzein on body composition in equol-producing postmenopausal women with prehypertension. J Obes. 2013;2013:359763. doi: 10.1155/2013/359763. Epub 2013 Aug 1.