Association Between Serum Periostin Levels and Cortical Porosity in Patients With Secondary Hyperparathyroidism
Based on the evidence that periostin is specifically involved in intra-cortical remodeling control, our working hypothesis is that assessment of its concentration in the serum would be helpful in identifying patients with severe cortical porosity, a critical parameter in bone fragility. Periostin expression by osteoblasts and osteocytes is part of the bone cortical response to anabolic stimuli such as mechanical strain or intermittent increase in parathyroid hormone. However, it remains unknown whether this expression may participate as well to mechanisms that will lead to exaggerated intra-cortical remodeling and subsequent bone loss.
In rare clinical situations in which trans-iliac bone biopsies will be necessary to better understand their bone status in addition to densitometry and biological bone markers assessment, specific analyses using immune-staining techniques will be performed on the bone sample. Data from routine follow-up every six months will be also collected in this specific sub-group.
High resolution peripheral quantitative computerized tomography (HR-pQCT) gives the opportunity of performing a virtual bone biopsy providing information on trabecular and cortical microarchitecture in vivo. These microarchitectural parameters allow a more accurate evaluation of the alteration of the bone structure and therefore of the fracture risk as compared to current tools used in clinical practice such as densitometry. However, the availability of such HRpQCT facilities is limited and there is on-going development on the best way of measuring porosity for example. The definition of a biological profile including key proteins such as periostin and sclerostin involved in porosity mechanisms is therefore of great interest. A better understanding of the relationship between bone matrix components and parathyroid hormone effects also appears as critical. Follow-up of routine evaluation parameters reflecting bone status in a subgroup of specific patients could also provide new and additional information.
調査の概要
研究の種類
入学 (実際)
段階
- 適用できない
連絡先と場所
研究場所
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Saint-etienne、フランス、42000
- CHU de Saint-Etienne
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- Hyperparathyroidism defined by a parathyroid hormone serum level above 65 ng/ml, secondary to Chronic Kidney Disease (CKD) ou vitamin D deficiency
Exclusion Criteria:
- Concurrent bone disease (such as Paget's disease, osteomalacia),
- Other endocrinopathy having an impact on bone metabolism (such as Cushing, hyperthyroidism, severe hypogonadism (except menopause)),
- Current or previous bisphosphonate treatment.
- Transplantation
- parathyroidectomy
- Life expectancy less than 3 months.
- Lack of study understanding.
- Lack of agreement.
- Under legal control.
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:基礎科学
- 割り当て:なし
- 介入モデル:単一グループの割り当て
- マスキング:なし(オープンラベル)
武器と介入
参加者グループ / アーム |
介入・治療 |
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実験的:secondary hyperparathyroidism
Blood specimen and HR-pQCT for measure bone quality and quantity
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血液検体
The Xtrem CT scanco device is a HR-pQCT used for 3D bone measurements at the tibia and the radius levels in humans
他の名前:
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この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
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Correlation between periostin level and cortical porosity
時間枠:day 1
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Correlation between periostin serum level (ng/ml) and cortical porosity.
Cortical porosity (%) is measured by HR-pQCT
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day 1
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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
---|---|---|
Correlation between periostin level and other trabecular and cortical microarchitectural parameters (composite outcome)
時間枠:day 1
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Correlation between periostin serum level (ng/ml) and other trabecular and cortical microarchitectural parameters. Cortical microarchitectural parameters are a composite measure measured by HR-pQCT. The measures are : Total volumetric mineral density (mg/ccm HA), Trabecular volumetric mineral density (mg/ccm HA), Cortical volumetric mineral density (mg/ccm HA), Number of bone trabeculae (1/mm), Trabecular thickness (mm), Cortical thickness (mm), Trabecular spacing (mm) o Trabecular distribution (mm) |
day 1
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Correlation between parathyroid hormon level and other trabecular and cortical microarchitectural parameters (composite outcome)
時間枠:day 1
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Correlation between parathyroid hormon serum level (pg/ml) and other trabecular and cortical microarchitectural parameters. Cortical microarchitectural parameters are a composite measure measured by HR-pQCT. The measures are : Total volumetric mineral density (mg/ccm HA), Trabecular volumetric mineral density (mg/ccm HA), Cortical volumetric mineral density (mg/ccm HA), Number of bone trabeculae (1/mm), Trabecular thickness (mm), Cortical thickness (mm), Trabecular spacing (mm) o Trabecular distribution (mm) |
day 1
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Correlation between Sclerostin serum level and cortical porosity
時間枠:Day 1
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Correlation between Sclerostin serum level (ng/ml) and cortical porosity.Cortical porosity (%) is measured by HR-pQCT.
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Day 1
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Correlation between parathyroid hormon level and cortical porosity
時間枠:Day 1
|
Correlation between parathyroid hormon serum level (pg/ml) and cortical porosity.Cortical porosity (%) is measured by HR-pQCT.
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Day 1
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協力者と研究者
捜査官
- 主任研究者:Thierry THOMAS, MD PhD、CHU de Saint-Etienne
研究記録日
主要日程の研究
研究開始
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (見積もり)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
本研究に関する用語
キーワード
追加の関連 MeSH 用語
その他の研究ID番号
- 1308046
- 130560B-22 (その他の識別子:ANSM)
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。
血液検体の臨床試験
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University of UtahAlbert Einstein College of Medicine; University of California, San Francisco; National Human Genome... と他の協力者完了新生児スクリーニング
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Bedford Hospital NHS TrustAnglia Ruskin Universityわからない