Nctid:
NCT00001741
Payload:
{"hasResults"=>false, "derivedSection"=>{"miscInfoModule"=>{"versionHolder"=>"2024-09-05"}, "conditionBrowseModule"=>{"meshes"=>[{"id"=>"D000002318", "term"=>"Cardiovascular Diseases"}]}, "interventionBrowseModule"=>{"meshes"=>[{"id"=>"D000019808", "term"=>"Losartan"}], "ancestors"=>[{"id"=>"D000000889", "term"=>"Anti-Arrhythmia Agents"}, {"id"=>"D000000959", "term"=>"Antihypertensive Agents"}, {"id"=>"D000047228", "term"=>"Angiotensin II Type 1 Receptor Blockers"}, {"id"=>"D000057911", "term"=>"Angiotensin Receptor Antagonists"}, {"id"=>"D000045504", "term"=>"Molecular Mechanisms of Pharmacological Action"}], "browseLeaves"=>[{"id"=>"M21701", "name"=>"Losartan", "asFound"=>"Doxorubicin", "relevance"=>"HIGH"}, {"id"=>"M4132", "name"=>"Angiotensin II", "relevance"=>"LOW"}, {"id"=>"M289354", "name"=>"Giapreza", "relevance"=>"LOW"}, {"id"=>"M4135", "name"=>"Angiotensinogen", "relevance"=>"LOW"}, {"id"=>"M4213", "name"=>"Anti-Arrhythmia Agents", "relevance"=>"LOW"}, {"id"=>"M4277", "name"=>"Antihypertensive Agents", "relevance"=>"LOW"}, {"id"=>"M25789", "name"=>"Angiotensin II Type 1 Receptor Blockers", "relevance"=>"LOW"}, {"id"=>"M28916", "name"=>"Angiotensin Receptor Antagonists", "relevance"=>"LOW"}], "browseBranches"=>[{"name"=>"Anti-Arrhythmia Agents", "abbrev"=>"AnArAg"}, {"name"=>"Antihypertensive Agents", "abbrev"=>"AnAg"}, {"name"=>"All Drugs and Chemicals", "abbrev"=>"All"}, {"name"=>"Vasoconstrictor Agents", "abbrev"=>"VaCoAg"}]}}, "protocolSection"=>{"designModule"=>{"phases"=>["PHASE1"], "studyType"=>"INTERVENTIONAL", "designInfo"=>{"primaryPurpose"=>"TREATMENT"}, "enrollmentInfo"=>{"count"=>200}}, "statusModule"=>{"overallStatus"=>"COMPLETED", "startDateStruct"=>{"date"=>"1997-11"}, "expandedAccessInfo"=>{"hasExpandedAccess"=>false}, "statusVerifiedDate"=>"2003-04", "completionDateStruct"=>{"date"=>"2003-04"}, "lastUpdateSubmitDate"=>"2008-03-03", "studyFirstSubmitDate"=>"1999-11-03", "studyFirstSubmitQcDate"=>"1999-11-03", "lastUpdatePostDateStruct"=>{"date"=>"2008-03-04", "type"=>"ESTIMATED"}, "studyFirstPostDateStruct"=>{"date"=>"1999-11-04", "type"=>"ESTIMATED"}}, "conditionsModule"=>{"keywords"=>["Angiotensin II Receptor", "Polymorphism, Genetic", "Vascular Tone", "Angiotensin II", "Losartan"], "conditions"=>["Cardiovascular Disease"]}, "referencesModule"=>{"references"=>[{"pmid"=>"1976655", "type"=>"BACKGROUND", "citation"=>"Rigat B, Hubert C, Alhenc-Gelas F, Cambien F, Corvol P, Soubrier F. An insertion/deletion polymorphism in the angiotensin I-converting enzyme gene accounting for half the variance of serum enzyme levels. J Clin Invest. 1990 Oct;86(4):1343-6. doi: 10.1172/JCI114844."}, {"pmid"=>"1328889", "type"=>"BACKGROUND", "citation"=>"Cambien F, Poirier O, Lecerf L, Evans A, Cambou JP, Arveiler D, Luc G, Bard JM, Bara L, Ricard S, et al. Deletion polymorphism in the gene for angiotensin-converting enzyme is a potent risk factor for myocardial infarction. Nature. 1992 Oct 15;359(6396):641-4. doi: 10.1038/359641a0."}, {"pmid"=>"1759997", "type"=>"BACKGROUND", "citation"=>"Alderman MH, Madhavan S, Ooi WL, Cohen H, Sealey JE, Laragh JH. Association of the renin-sodium profile with the risk of myocardial infarction in patients with hypertension. N Engl J Med. 1991 Apr 18;324(16):1098-104. doi: 10.1056/NEJM199104183241605."}]}, "descriptionModule"=>{"briefSummary"=>"The renin angiotensin system is a complex process involving hormones and enzymes that regulate blood volume and blood pressure. The hormone angiotensin II is responsible for making blood vessels narrow or constrict. Angiotensin II is found in the blood and can attach to special sites called receptors on blood vessel walls. These receptors are programmed to accept angiotensin II and cause a constriction of the blood vessel. This function is found in the genetic information of each individual person.\n\nOccasionally patients have changes in their genes related to angiotensin II receptors. These changes may result in the receptors acting differently to angiotensin II, which may affect the function of blood vessels.\n\nThis study is designed to improve researchers understanding of the physiological effects on blood vessels associated with mutations of the genes responsible for angiotensin II receptor function.", "detailedDescription"=>"Polymorphisms in the genes encoding for various elements of the renin angiotensin system have been associated with cardiovascular disease. We have isolated novel alleles in the angiotensin II type I receptor gene. We propose this exploratory investigation to study the physiological effect of these mutations on vascular function in patients and family members who carry these rare alleles."}, "eligibilityModule"=>{"sex"=>"ALL", "stdAges"=>["CHILD", "ADULT", "OLDER_ADULT"], "healthyVolunteers"=>true, "eligibilityCriteria"=>"Patients aged 21 or older with chronic orthostatic intolerance will be included.\n\nThere will be no exclusion from participation in the study on the basis of ethnicity/race.\n\nPatients will be recruited in the Cardiology Branch outpatient clinic, Dr. David Goldstein (Chief Neurocardiology Section, NINDS, NIH), or from outside physicians.\n\nChildren will be excluded from the study because of inability in obtaining informed consent.\n\nCognitively impaired individuals, prisoners, or other institutionalized persons will not be able to participate."}, "identificationModule"=>{"nctId"=>"NCT00001741", "briefTitle"=>"Study of Inherited Changes of Receptors Located on Blood Vessels", "organization"=>{"class"=>"NIH", "fullName"=>"National Institutes of Health Clinical Center (CC)"}, "officialTitle"=>"Study of Vascular Responsiveness in Subjects With Polymorphisms of the Angiotensin II Type I Receptor Gene", "orgStudyIdInfo"=>{"id"=>"980029"}, "secondaryIdInfos"=>[{"id"=>"98-H-0029"}]}, "armsInterventionsModule"=>{"interventions"=>[{"name"=>"Losartan", "type"=>"DRUG"}]}, "contactsLocationsModule"=>{"locations"=>[{"zip"=>"20892", "city"=>"Bethesda", "state"=>"Maryland", "country"=>"United States", "facility"=>"National Heart, Lung and Blood Institute (NHLBI)", "geoPoint"=>{"lat"=>38.98067, "lon"=>-77.10026}}]}, "sponsorCollaboratorsModule"=>{"leadSponsor"=>{"name"=>"National Heart, Lung, and Blood Institute (NHLBI)", "class"=>"NIH"}}}}
