Genetic Research of Bone Morphogenetic Protein Receptor-II Gene in Taiwanese Patient With Primary Pulmonary Hypertension

Not Applicable

• Conditions: Pulmonary Hypertension
• Interventions: Procedure: for BMPR II study; Genetic: BMPRII

• Registration Number: NCT00173537
• Lead Sponsor: National Taiwan University Hospital

Brief Summary

Primary pulmonary hypertension (PPH) is a rare lung disorder in which the blood pressure in the pulmonary artery rises far above normal levels for no apparent reason. The pulmonary artery is a blood vessel carrying oxygen-poor blood from the right ventricle (one of the heart's pumping chambers) to the lungs. In the lungs, the blood picks up oxygen, then flows to the heart's left side, where the left ventricle pumps it to the rest of the body through the aorta. In the United States, an estimated 500 to 1,000 new cases of primary pulmonary hypertension are diagnosed each year. The greatest number is reported in women between ages 20 and 40. However, men and women in all age ranges as well as very young children can develop PPH. Researchers have identified more than 40 BMPR2 mutations that can cause primary pulmonary hypertension. Many of these mutations introduce a stop signal that halts protein production prematurely, decreasing the amount of functional BMPR2 protein. Other mutations prevent the BMPR2 protein from reaching the cell surface, or alter its structure so it cannot form a complex with other proteins. It remains unclear how BMPR2 mutations cause primary pulmonary hypertension. Researchers suggest that a mutation in this gene prevents cell death or promotes cell proliferation, resulting in an overgrowth of cells in the blood vessels of the lungs. Cell overgrowth can narrow the diameter of the vessels, restricting blood flow and resulting in elevated blood pressure. However, it has not yet been reported regarding the genetic variants in Taiwan. Further details have been described in this project proposal.

Detailed Description

Not available

Study Timeline

• Study Start: 2005-07
• Study First Submitted: 2005-09-12
• Study First Submitted QC: 2005-09-12
• Study First Posted: 2005-09-15
• Primary Completion: 2009-11
• Status Verified: 2012-12
• Last Update Submitted: 2012-12-26
• Last Update Posted: 2012-12-27
• Study Completion: 2013-12

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 1

Inclusion Criteria

• diagnosed as idiopathic pulmonary artery hypertension and associated family

Exclusion Criteria

• none

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
other	for BMPR II study	-
other	BMPRII	-

Primary Outcome Measures

Name	Time	Method
all cause follow up	eight years	all cause follow up

Trial Locations

Locations (1)

National Taiwan University Hospital; 🇨🇳 Taipei, Taiwan