Decreased Myocardial Taurine Levels and Hypertaurinuria in a Kindred with Mitral-Valve Prolapse and Congestive Cardiomyopathy
In a 46-member kindred with consanguineous ancestry, eight progeny in two generations had congestive cardiomyopathy and markedly elevated urinary taurine levels (range, 411 to 536 mg per gram of creatinine [normal ±S.D., 89±32]). Ten other family members had late or holosystolic mitral-valve prolaps...
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Published in | The New England journal of medicine Vol. 304; no. 3; pp. 129 - 135 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
United States
Massachusetts Medical Society
15.01.1981
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Subjects | |
Online Access | Get full text |
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Summary: | In a 46-member kindred with consanguineous ancestry, eight progeny in two generations had congestive cardiomyopathy and markedly elevated urinary taurine levels (range, 411 to 536 mg per gram of creatinine [normal ±S.D., 89±32]). Ten other family members had late or holosystolic mitral-valve prolapse, and elevated urinary taurine values (range, 215 to 265 mg). In two with mitral-valve prolapse, congestive cardiomyopathy eventually developed while the amounts of urinary taurine doubled. One member with mitral-valve prolapse died suddenly; histologic examination revealed myocardial fibrosis in the papillary muscles and myocardial taurine values of 16.9±3.0 μmol per gram of protein (normal ±S.E., 33.2±3.6). Four other family members with congestive cardiomyopathy had myocardial fibrosis at autopsy or biopsy and mean myocardial taurine levels of 9.2±2.2 μmol. We conclude that hypertaurinuria and depressed levels of taurine in the myocardium may be associated with one type of mitral-valve-prolapse syndrome and a rapidly progressive form of congestive cardiomyopathy. (N Engl J Med. 1981; 304:129–35.)
ALTHOUGH mitral-valve prolapse and idiopathic congestive cardiomyopathy may occur together in any given family,
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no common biochemical or genetic link has been established between these disorders. Numerous associations have been reported
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however, mitral-valve prolapse usually occurs as an isolated phenomenon
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and in most cases is idiopathic.
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Likewise, congestive cardiomyopathy may result from several causes, but is also usually idiopathic.
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There is evidence that mitral-valve prolapse, or at least one type of it, is transmitted through autosomal-dominant inheritance.
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Idiopathic congestive cardiomyopathy may also be familial, but the pattern of inheritance is less clear.
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We have studied a large, inbred kindred of . . . |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Correction/Retraction-1 ObjectType-Feature-3 content type line 23 |
ISSN: | 0028-4793 1533-4406 |
DOI: | 10.1056/NEJM198101153040301 |