Anti-hypertensive Effect of Mycelia of Antrodia Cinnamomea

NCT ID: NCT02532699

Last Updated: 2015-08-26

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 41 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2011-06-30
• Study Completion Date: 2012-07-31

Brief Summary

This the first report undertaken to assess the effect of supplementation with oral gamma-aminobutyric acid (GABA), adenosine and antrosterol-containing AC mycelia on blood pressure among people with mild hypertension. Overall, AC mycelia consumption for 8 weeks could successfully reduce mean diastolic and systolic BP through the suppression of PRA that is linked to downstream suppresion of angiotensin II formation, which further decreases the sympathetic outflow that leads to hypertension. In addition to blood pressure lowering properties, AC mycelia also has beneficial effect in reducing oxidative stress, significantly. No adverse events were noted, suggesting that AC mycelia deserve its consideration as a candidate for safe alternative treatment to conventional anti-hypertensive medications.

Detailed Description

This the first report undertaken to assess the effect of supplementation with oral gamma-aminobutyric acid (GABA), adenosine and antrosterol-containing AC mycelia on blood pressure among people with mild hypertension. Forty-one subjects with systolic blood pressure (SBP) between 130 and 179 mm Hg and/or diastolic blood pressure (DBP) between 85 and 109 mm Hg were randomized to receive either AC mycelia or starch placebo for 8 weeks, and had follow-up observation for an additional 2 weeks. SBP in the subjects given GABA, adenosine and antrosterol-rich AC mycelia significantly decreased compared to those who received the placebo (p<0.05). DBP also decreased after the intake of AC mycelia. Compared to the placebo, AC mycelia significantly reduced plasma renin activity by a maximum of 25 % and 36 % on week 8. This suppression suggested that AC mycelia is a potent inhibitor of renin, and its bioavailability is sufficient to produce BP reduction after a short term of oral administration. Neither adverse events nor abnormal laboratory findings were noted throughout the study period, suggesting that GABA, adenosine and antrosterol-rich AC mycelia significantly decreased borderline hypertension, which may support its consideration as a safe alternative treatment compared to conventional anti-hypertensive medications.

Conditions

Hypertension

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: DOUBLE

Study Groups

AC mycelia

Subjects receive three capsules per day containing either 420 mg of AC mycelia.

Group Type: ACTIVE_COMPARATOR

AC mycelia

Intervention Type: DIETARY_SUPPLEMENT

An 8 week double-blinded randomized placebo-controlled parallel study with 2 week follow-up period was performed in mild hypertension subjects. Consenting eligible subjects were receive three capsules per day containing either 420 mg of AC mycelia of similar appearance for 8 weeks. The subjects were required to visit at baseline, every two weeks during the intervention period (8 weeks), and at follow-up 2 weeks after treatment had ended. During each study visit, systolic and diastolic BPs were recorded, fasting blood samples were collected and anthropometric measurements were performed. Compliance was evaluated using a food diary and monitored with biweekly telephone calls.

Placebo

Subjects receive three capsules per day containing starch placebo of similar appearance.

Group Type: PLACEBO_COMPARATOR

Placebo

Intervention Type: DIETARY_SUPPLEMENT

An 8 week double-blinded randomized placebo-controlled parallel study with 2 week follow-up period was performed in mild hypertension subjects. Consenting eligible subjects were receive three capsules per day containing 420 mg starch placebo of similar appearance for 8 weeks. The subjects were required to visit at baseline, every two weeks during the intervention period (8 weeks), and at follow-up 2 weeks after treatment had ended. During each study visit, systolic and diastolic BPs were recorded, fasting blood samples were collected and anthropometric measurements were performed. Compliance was evaluated using a food diary and monitored with biweekly telephone calls.

Interventions

AC mycelia

An 8 week double-blinded randomized placebo-controlled parallel study with 2 week follow-up period was performed in mild hypertension subjects. Consenting eligible subjects were receive three capsules per day containing either 420 mg of AC mycelia of similar appearance for 8 weeks. The subjects were required to visit at baseline, every two weeks during the intervention period (8 weeks), and at follow-up 2 weeks after treatment had ended. During each study visit, systolic and diastolic BPs were recorded, fasting blood samples were collected and anthropometric measurements were performed. Compliance was evaluated using a food diary and monitored with biweekly telephone calls.

Intervention Type: DIETARY_SUPPLEMENT

Placebo

An 8 week double-blinded randomized placebo-controlled parallel study with 2 week follow-up period was performed in mild hypertension subjects. Consenting eligible subjects were receive three capsules per day containing 420 mg starch placebo of similar appearance for 8 weeks. The subjects were required to visit at baseline, every two weeks during the intervention period (8 weeks), and at follow-up 2 weeks after treatment had ended. During each study visit, systolic and diastolic BPs were recorded, fasting blood samples were collected and anthropometric measurements were performed. Compliance was evaluated using a food diary and monitored with biweekly telephone calls.

Intervention Type: DIETARY_SUPPLEMENT

Other Intervention Names

niu-chang-chih

Eligibility Criteria

Inclusion Criteria

• Eligible subjects were untreated hypertensive men or women aged between 20 and 80 years old with SBP between 130 and 179 mmHg and/or DBP between 85 and 109 mmHg as measured in a sitting position

Exclusion Criteria

• Subjects were excluded if they had a history of major cardiovascular disease, severe liver dysfunction, insulin-dependent diabetes mellitus or stroke. They were also excluded if they routinely consumed alcohol, were pregnant or unable to comprehend study instructions.

• Minimum Eligible Age: 20 Years
• Maximum Eligible Age: 80 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Chung Shan Medical University

OTHER

Sponsor Role: lead

Responsible Party

You-Cheng Shen

School of Health Diet and Industry Managment

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

You-Cheng Mr Shen, Ph.D.

Role: PRINCIPAL_INVESTIGATOR

Chung Shan Medical University

References

1. Geethangili, M.; Tzeng, Y.M. Review of pharmacological effects of antrodia camphorata and its bioactive compounds. Evidence-based complementary and alternative medicine : eCAM 2011, 2011, 212641. 2. Liu, D.Z.; Liang, Y.C.; Lin, S.Y.; Lin, Y.S.; Wu, W.C.; Hou, W.C.; Su, C.H. Antihypertensive activities of a solid-state culture of taiwanofungus camphoratus (chang-chih) in spontaneously hypertensive rats. Bioscience, biotechnology, and biochemistry 2007, 71, 23-30. 3. Jong-Wook Shin, S.-I.L.; Kim, S.-D. Effect of acetic acid fermented juice prepared using submerged culture media of antrodia camphorata mycelium on blood glucose and lipid profiles of rats in which diabetes was induced with streptozotocin. Korean J. Food Preserv. 2008, 15, 725-730.

Reference Type: BACKGROUND

Other Identifiers

E099N0115-MY2

Identifier Type: OTHER_GRANT

Identifier Source: secondary_id

CS11043

Identifier Type: -

Identifier Source: org_study_id