The Effect of Vitamin K2 on Bone Turnover

October 26, 2018 updated by: Eisai Limited

Short-Term Menatetrenone Therapy Increases Gamma-Carboxylation Of Osteocalcin With A Moderate Increase Of Bone Turnover In Postmenopausal Osteoporosis: A Randomized Prospective Study

To investigate the effect of menatetrenone on bone turnover in postmenopausal patients with osteoporosis. One month of menatetrenone therapy enhanced the secretion and gamma-carboxylation of osteocalcin. Moderate increases of bone resorption and formation markers were observed after 6 months. These changes may contribute to fracture prevention in patients with osteoporosis.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

131

Phase

  • Phase 4

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

  • Japan
    • Saitama Prefecture
      • Kumagaya-shi, Saitama Prefecture, Japan, 350-0831
    • Tokyo
      • Hachioji-shi, Tokyo, Japan, 192-0065
      • Setagaya-Ku, Tokyo, Japan, 157-0066
    • Yamanashi Prefecture
      • Nishiyatsushiro-Gun, Yamanashi Prefecture, Japan, 409-3244

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

49 years to 90 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion criteria:

  • A diagnosis of osteoporosis was made according to the Year 2000 version of the Diagnostic Criteria for Osteoporosis proposed by the Japanese Society for Bone and Mineral Research.
  • These criteria state that patients with a lumbar bone mineral density (BMD)<70% of the young adult mean or patients with pre-existing osteoporotic fractures and a lumbar BMD<80% of the young adult mean can be diagnosed as having osteoporosis.

Exclusion criteria:

  • Patients with secondary osteoporosis (e.g., due to major gastrointestinal surgery, steroid therapy, rheumatoid arthritis, premenopausal bilateral oophorectomy, renal dysfunction, and thyroid dysfunction ).
  • Patients taking medications that could affect bone turnover (such as bisphosphonates, estrogen, calcitonin, SERM, active vitamin D3, or Warfarin) were excluded.

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 Assignment
  • Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Gamma-carboxylation

Secondary Outcome Measures

Outcome Measure
Bone turnover marker

Collaborators and Investigators

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

Sponsor

Eisai Limited

Investigators

  • Study Director: Norio Iinuma, Post -marketing Clinical Research Department, Clinical Research Center - Eisai Company Limited

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)

February 1, 2002

Primary Completion (Actual)

January 1, 2013

Study Completion (Actual)

January 1, 2013

Study Registration Dates

First Submitted

October 23, 2007

First Submitted That Met QC Criteria

October 23, 2007

First Posted (Estimate)

October 24, 2007

Study Record Updates

Last Update Posted (Actual)

October 29, 2018

Last Update Submitted That Met QC Criteria

October 26, 2018

Last Verified

October 1, 2007

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • E0167-J081-191

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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