- ICH GCP
- 미국 임상 시험 레지스트리
- 임상시험 NCT01931891
Extracellular Matrix Remodeling of the Umbilical Cord and Placenta in Preeclampsia
Preeclampsia affects 2% to 8% of all pregnancies and is a major cause of maternal morbidity an mortality worldwide.Althought the primary pathology leading to preeclampsia is remain not known, complex pathophysiologic pathways and mechanisms have been described.
New blood vessels evolve during angiogenesis and vasculogenesis, two physiological processes, that play a crucial role in embryogenesis and placentation. Structural alterations in the human umbilical cord, maternal spiral arteries can cause adverse fetal consequences.Pre-eclampsia is accompanied by an extensive remodelling of the ECM of the umbilical cord. Pre-eclamptic Wharton's jelly contains higher amounts of glycosaminoglycans in comparison to control tissue.
Matrixmetalloproteinases (MMPs) are a family of proteolytic enzymes that degrade various components of the extracellular matrix (ECM). A Disintegrin And Metalloproteinases (ADAMs) and ADAMs with Thrombospondin motifs (ADAMTS) are proteinases closely related to Matrix Metalloproteinases (MMPs). Dysregulation of ADAMs and ADAMTS expression have been reported in different types of pathologies such as cancer, osteoarthritis, neurodegenerative inflammation or asthma.
The role of ADAMTS in the pathomechanism of pre-eclampsia has not been studied until now. We therefore decided to compare the ADAMTS composition of the umbilical cord and placenta from newborns of mothers with pre-eclampsia with those with normal pregnancy.
연구 개요
상태
상세 설명
Preeclampsia is a multi-systemic disorder. Despite its seriousness, the aetyology remains unknown. Current theories include abnormal placentation, cardiovascular maladaptation to pregnancy, genetic and immune mechanisms, angiogenic factors and an enhanced systemic inflammatory response. Poor placental perfusion leading to wide spread maternal endothelial dysfunction is accepted as a major mechanism.
The trophoblastic invasion of maternal vessels results many changes in extracellular matrix, which gives rise to high uteroplacental vessel distensibility to accommodate the increased blood flow. So, İn normal pregnancy, there is a wide spread vasodilatation, with increased arterial compliance and reduced peripheral vascular resistance.In preeclampsia, however, trophoblastic invasion is reduced, leading to incomplete modification of maternal spiral arteries and therefore to decreases in placental perfusion.
Pre-eclampsia is accompanied by an extensive remodelling of the ECM of the umbilical cord and placenta. Pre-eclamptic Wharton's jelly contains higher amounts of glycosaminoglycans in comparison to control tissue.
Matrix metalloproteinases (MMPs) are a family of proteolytic enzymes that degrade various components of the extracellularmatrix (ECM). These enzymes play an essential role in physiological states such as tissue remodeling, morphogenesis and wound healing anda lso in pathological processes such as tumor cell invasion and metastasis.
A Disintegrin And Metalloproteinases (ADAMs) and ADAMs with Thrombospondin motifs (ADAMTS) are proteinases closely related to Matrix Metalloproteinases (MMPs). Dysregulation of ADAMsexpression has beenreported in differenttypes of pathologies such as cancer, osteoarthritis, neurodegenerative inflammation or asthma.
Some authors suggestted that ADAM-8, -9, -10, -12, -15, -17, and ADAMTS-1 might play roles in uterus remodeling during the periimplantation period and ADAMTS-12, independent of its proteolytic activity, plays a critical role in human trophoblastic cell invasion in vitro.
Human umbilical cord is an extra-embryonic structure linking the mother and fetus during pregnancy In the umbilical cord two arteries and one vein are surrounded by a collagen-rich, myxomatous substance, called Wharton's jelly (WJ) that protect the umbilical vessels against extension, bending, twisting and compression.
The extracellular matrix (ECM) of WJ is very copious and contains significant amounts of hyaluronic acid and some sulphated glycosaminoglycans (GAGs). İts interesting that Wharton's jelly contain a low number of cells but large amounts of collagen and GAGs. Wharton's jelly plays also an important role as a storage for some compounds, such as growth factor. Previous studies demonstrated that both human umbilical cord serum and tissues contain large amounts of IGF-I and IGF-binding proteins (BPs), mainly BP-1 and BP-3.
Structural alterations in the human umbilical cord can cause adverse fetal consequences. ECM dynamics can result from changes of ECM composition, for example, because of altered synthesis or degradation of one or more ECM components, or in architecture because of altered organization. Pre-eclampsia is accompanied by an extensive remodelling of the ECM of the umbilical cord.
İt found that significant increase in collagen content in the umbilical cord arteries and vein and premature replacement of hyaluronic acid by sulfated GAGs both in the UCAs and in Wharton's jelly in preeclampsia. Pre-eclamptic Wharton's jelly contains higher amounts of glycosaminoglycans in comparison to control tissue.
The role of ADAMTS in the pathology of pre-eclampsia has not been studied until now. We therefore decided to compare the ADAMTS composition of the umbilical cord and placenta from newborns of mothers with pre-eclampsia with those with normal pregnancy.
연구 유형
등록 (예상)
연락처 및 위치
연구 연락처
- 이름: ayse kirbas, md
- 전화번호: 533-646-9213
- 이메일: ayseozdemirkirbas@hotmail.com
연구 장소
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Ankara, 칠면조
- 모병
- Zekai Tahir Burak Maternity Hospital
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연락하다:
- nuri danisman, md
- 전화번호: 306-5000
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참여기준
자격 기준
공부할 수 있는 나이
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
샘플링 방법
연구 인구
설명
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Inclusion Criteria:
Clinical diagnosis of preeclampsia (diagnosed per ACOG criteria)
Exclusion Criteria:
known chronic disease multipl pregnancies
Exclusion Criteria:
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공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 관찰 모델: 케이스 컨트롤
- 시간 관점: 단면
코호트 및 개입
그룹/코호트 |
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prreclampsia
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연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
기간 |
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severe preclampsia
기간: 34 weeks
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34 weeks
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공동 작업자 및 조사자
수사관
- 수석 연구원: ayse kirbas, md, Zekai Tahir Burak Hospital
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 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
- ztb- wharton jelly
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
미국에서 제조되어 미국에서 수출되는 제품
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