Evidence map›Paper›PMID 26137225›Full record

ArticleBiomedical reports2015

Effects of the combination of vitamin K and teriparatide on the bone metabolism in ovariectomized rats.

Nana Nagura, Jun Komatsu, Hideaki Iwase, Hiroshi Hosoda, Osamu Ohbayashi, Isao Nagaoka, Kazuo Kaneko

Abstract read
In one paragraph

Article in Biomedical reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Review
  3. Article
  4. Article
  5. Role of Vitamin K in Bone and Muscle Metabolism.Calcified tissue international · 2023
    Review
  6. Article
  7. Article
  8. Vitamin K in CKD Bone Disorders.Calcified tissue international · 2021
    Review
  9. Review
  10. Review
  11. Article
  12. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Nana NaguraDepartment of Medicine for Motor Organs, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan.
Jun KomatsuDepartment of Medicine for Motor Organs, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan.
Hideaki IwaseDepartment of Bio-Engineering, Juntendo University Institute of Casualty Center, Izunokuni, Shizuoka 410-2295, Japan.
Hiroshi HosodaDepartment of Host Defense and Biochemical Research, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan.
Osamu OhbayashiDepartment of Medicine for Motor Organs, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan.
Isao NagaokaDepartment of Host Defense and Biochemical Research, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan.
Kazuo KanekoDepartment of Medicine for Motor Organs, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The purpose of the present study was to evaluate the combined effects of vitamin K (VK) and teriparatide (TPTD) on bone mineral density (BMD), mechanical strength and other parameters for bone metabolism using a rat ovariectomized osteoporosis model. Ovariectomized female Sprague-Dawley rats were administered with VK (an oral dose of 30 mg/kg/day), TPTD (a subcutaneous dose of 30 µg/kg, three times a week) or a combination for 8 weeks. Thereafter, serum levels of γ-carboxylated osteocalcin (Gla-OC) were quantitated by ELISA; BMD and mechanical strength were measured by computed tomography and biomechanical testing, respectively at the femoral metaphysis. Additionally, histomorphometry was performed using the toluidine blue-stained coronal sections of distal femur. The combination of VK and TPTD clearly increased the serum levels of Gla-OC (a specific marker for bone formation) and osteoblast surface (the number of osteoblasts attaching with the surface of cancellous bone), compared to VK or TPTD alone. In addition, the combination of the two agents improved the BMD and bone strength of the femur in the ovariectomized rats, compared to VK or TPTD alone. Taken together, these findings suggest that the treatment with VK and TPTD may have a therapeutic advantage over VK or TPTD monotherapy for postmenopausal osteoporosis, possibly by enhancing the bone formation through the actions on OC and osteoblasts.

Indexed as

bone metabolismosteocalcinovariectomized ratsteriparatidevitamin K

Identifiers

PMID26137225
PMCPMC4467291

What OpenQuestion holds

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Read underepoch 390

Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.