Evidence map›Paper›PMID 34387115›Full record

ArticleBone & joint research2021

Intra-articular low-dose parathyroid hormone (1-34) improves mobility and articular cartilage quality in a preclinical age-related knee osteoarthritis model.

Chung-Hwan Chen, Lin Kang, Ling-Hua Chang, Tsung-Lin Cheng, Sung-Yen Lin, Shun-Cheng Wu, Yi-Shan Lin, Shu-Chun Chuang, Tien-Ching Lee, Je-Ken Chang and 1 more

Open access · goldAbstract read
In one paragraph

Article in Bone & joint research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 2 pooled it
2.6field-weighted citation impact, top 10% 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

11 citing papers in PubMed, 2 syntheses or guidelines pooled it, 16 citations in OpenAlex.

  1. Pooled it
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  3. Article
  4. Cross-Linked Versus Linear Hyaluronic Acid for Cartilage Repair in Rat Post-Traumatic Osteoarthritis.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

11 authors at 3 institutions in 1 country.

Chung-Hwan ChenOrthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.ORCID https://orcid.org/0000-0001-8941-4792
Lin KangDepartment of Obstetrics and Gynecology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Ling-Hua ChangOrthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.
Tsung-Lin ChengOrthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.
Sung-Yen LinOrthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.
Shun-Cheng WuOrthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.
Yi-Shan LinOrthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.
Shu-Chun ChuangOrthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.
Tien-Ching LeeOrthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.
Je-Ken ChangOrthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.ORCID https://orcid.org/0000-0001-8485-2574
Mei-Ling HoOrthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan.
Kaohsiung Medical University · TWNational Sun Yat-sen University · TWNational Cheng Kung University Hospital · TW

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsOsteoarthritis (OA) is prevalent among the elderly and incurable. Intra-articular parathyroid hormone (PTH) ameliorated OA in papain-induced and anterior cruciate ligament transection-induced OA models; therefore, we hypothesized that PTH improved OA in a preclinical age-related OA model.

methodsGuinea pigs aged between six and seven months of age were randomized into control or treatment groups. Three- or four-month-old guinea pigs served as the young control group. The knees were administered 40 μl intra-articular injections of 10 nM PTH or vehicle once a week for three months. Their endurance as determined from time on the treadmill was evaluated before kill. Their tibial plateaus were analyzed using microcalculated tomography (μCT) and histological studies.

resultsPTH increased the endurance on the treadmill test, preserved glycosaminoglycans, and reduced Osteoarthritis Research Society International score and chondrocyte apoptosis rate. No difference was observed in the subchondral plate bone density or metaphyseal trabecular bone volume and bone morphogenetic 2 protein staining.

conclusionSubchondral bone is crucial in the initiation and progression of OA. Although previous studies have shown that subcutaneous PTH alleviates knee OA by improving subchondral and metaphyseal bone mass, we demonstrated that intra-articular PTH injections improved spontaneous OA by directly affecting the cartilage rather than the subchondral or metaphyseal bone in a preclinical age-related OA model. Cite this article:

Indexed as

Age-related osteoarthritisapoptosisApoptosisarticular cartilagescartilagechondrocytesglycosaminoglycan (GAG)knee osteoarthritiskneesParathyroid hormonestainingtrabecular bone

Identifiers

PMID34387115
PMCPMC8414442
OpenAlexW3187912988

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

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.