Evidence map›Paper›PMID 28503340›Full record

ArticleBone research2017

Administration frequency as well as dosage of PTH are associated with development of cortical porosity in ovariectomized rats.

Aya Takakura, Ji-Won Lee, Kyoko Hirano, Yukihiro Isogai, Toshinori Ishizuya, Ryoko Takao-Kawabata, Tadahiro Iimura

Open access · goldAbstract read
In one paragraph

Article in Bone research, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
4.6field-weighted citation impact, top 5% of its field
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

24 citing papers in PubMed, 41 citations in OpenAlex.

  1. Trial
  2. Study of twice-weekly injections of Teriparatide by comparing efficacy with once-weekly injections in osteoporosis patients: the TWICE study.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2019
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  7. Regional and Sexual Dimorphism in Murine Skeletal Responses to Osteocytic HIF Pathway Modulation.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2026
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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 at 2 institutions in 1 country.

Aya TakakuraPharmaceuticals Research Center, Asahi Kasei Pharma Corporation, Shizuoka, Japan.
Ji-Won LeeDivision of Bio-Imaging, Proteo-Science Center (PROS), Ehime University, Ehime, Japan.
Kyoko HiranoPharmaceuticals Research Center, Asahi Kasei Pharma Corporation, Shizuoka, Japan.
Yukihiro IsogaiPharmaceuticals Research Center, Asahi Kasei Pharma Corporation, Shizuoka, Japan.
Toshinori IshizuyaPharmaceuticals Research Center, Asahi Kasei Pharma Corporation, Shizuoka, Japan.
Ryoko Takao-KawabataPharmaceuticals Research Center, Asahi Kasei Pharma Corporation, Shizuoka, Japan.
Tadahiro IimuraGraduate School of Medicine, Division of Analytical Bio-Medicine, Ehime University, Ehime, Japan.
Asahi Kasei (Japan) · JPEhime University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

To investigate whether the administration frequency of parathyroid hormone (PTH) is associated with the development of cortical porosity, this study established 15 dosage regimens of teriparatide [human PTH(1-34), TPTD] with four distinct concentrations and four distinct administration frequencies of TPTD to 16-week-old ovariectomized rats. Our analyses demonstrated that the bone mineral density, mechanical properties, and bone turnover were associated with the total amount of TPTD administered. Our observations further revealed that the cortical porosity was markedly developed as a result of an increased administration frequency with a lower concentration of total TPTD administration in our setting, although the highest concentration also induced cortical porosity. Deconvolution fluorescence tiling imaging on calcein-labeled undecalcified bone sections also demonstrated the development of cortical porosity to be closely associated with the bone site where periosteal bone formation took place. This site-specific cortical porosity involved intracortical bone resorption and an increased number and proximity of osteocytic lacunae, occasionally causing fused lacunae. Taken together, these findings suggested the involvement of local distinctions in the rate of bone growth that may be related to the site-specific mechanical properties in the development of cortical porosity induced by frequent and/or high doses of TPTD.

Identifiers

PMID28503340
PMCPMC5405404
OpenAlexW2608151193

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.