- ICH GCP
- 미국 임상 시험 레지스트리
- 임상시험 NCT01660308
Observing the Changes of Fibroblast Growth Factor 23 in Patients of Tumor Induced Osteomalacia
Fibroblast froth factors (FGFs) are humoral factors identified by their ability to stimulate cell proliferation1. They play different roles in the regulation of cell proliferation, differentiation and function. Most FGF family members act as paracrine factors. But FGF19(FGF19) subfamily members, including FGF19, 21, and 23, work as endocrine factors to regulate bile acid, carbohydrate and phosphate metabolism2. Of these, FGF23 plays an important role in phosphate and bone metabolism3. FGF23 gene encodes 251 amino acids, including a 24-amino acid signal peptide4. The secreted FGF23 is a protein consisted of 227 amino acids. It works by binding to a Klotho-FGF receptor 1c (FGF1c) complex5. FGF suppresses the expression of type 2a and 2c sodium-phosphate cotransporters, which mediate phosphate reabsorption in proximal tubules.6 FGF23 decreases 25-hydroxyvitamin D-1α-hydroxylase expression and enhances 25-hydroxyvitamin D-24-hydroxylase expression6. Therefore, FGF23 reduces serum 1,25-dihydroxyvitamin D〔1,25(OH)2D〕, which stimulates intestinal calcium and phosphate absorption. FGF23 decreases serum phosphate through the above mechanisms FGF23 over-expression might result in hypophosphatemic rickets and osteomalacia.
Tumor induced osteomalacia (TIO) is a paraneoplastic syndrome usually caused by benign phosphaturic mesenchymal tumors. Symptoms are nonspecific, such as general weakness, fatigue, and bone pain. Sometimes fracture may occurs. The responsible tumors are sometimes small and difficult to detect. Tumors secrete FGF23. FGF23 reduced phosphate reabsorption in the proximal tubules and decrease 1,25(OH)2D levels, which result in hypophosphatemia and then osteomalacia.
The investigators would like to observe the changes of FGF23 in patients who receive operation or medical treatment and hope this will benefit future treatment.
연구 개요
상태
정황
연구 유형
등록 (예상)
연락처 및 위치
연구 장소
-
-
-
Taipei, 대만
- 모병
- National Taiwan University Hospital
-
연락하다:
- Shyang-Rong Shih, PhD
- 전화번호: 886-972653337
- 이메일: srshih@ntu.edu.tw
-
수석 연구원:
- Shyang-Rong Shih, PhD
-
-
참여기준
자격 기준
공부할 수 있는 나이
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
샘플링 방법
연구 인구
설명
Inclusion Criteria:
- patients with tumor induced osteomalacia.
- people without osteomalacia such as healthy people,
- people under dialysis,
- people with poor nutrition.
Exclusion Criteria:
- people younger than 20 years old or older than 85 years old.
- people who are pregnant.
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 관찰 모델: 케이스 컨트롤
- 시간 관점: 유망한
코호트 및 개입
그룹/코호트 |
---|
Tumor induced osteomalcia
|
연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
기간 |
---|---|
FGF23, P
기간: at the time TIO is diagnosed
|
at the time TIO is diagnosed
|
공동 작업자 및 조사자
수사관
- 수석 연구원: Shyang-Rong Shih, PhD, National Taiwan University Hospital
간행물 및 유용한 링크
일반 간행물
- Lin CH, Chang CK, Shih CW, Li HY, Chen KY, Yang WS, Tsai KS, Wang CY, Shih SR. Serum fibroblast growth factor 23 and mineral metabolism in patients with euthyroid Graves' diseases: a case-control study. Osteoporos Int. 2019 Nov;30(11):2289-2297. doi: 10.1007/s00198-019-05116-1. Epub 2019 Aug 5.
- Lin HA, Shih SR, Tseng YT, Chen CH, Chiu WY, Hsu CY, Tsai KS. Ovarian cancer-related hypophosphatemic osteomalacia--a case report. J Clin Endocrinol Metab. 2014 Dec;99(12):4403-7. doi: 10.1210/jc.2014-2120.
연구 기록 날짜
연구 주요 날짜
연구 시작
기본 완료 (예상)
연구 완료 (예상)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (추정)
연구 기록 업데이트
마지막 업데이트 게시됨 (추정)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .