Genetic Epidemiology of Coronary Heart Disease Risk in Women Twins
調査の概要
詳細な説明
BACKGROUND:
In 1974, a twin registry was established from members of the Kaiser Permanente Medical Care Program's Northern California region. In all, 9,821 twin pairs were enrolled. In 1978-1979, 434 pairs of female twins were recruited from the registry for a clinical examination of coronary heart disease risk factors. The clinical examination included an extensive health questionnaire, measurements of plasma lipids and serum chemistries, analyses of genetic markers for determination of zygosity, measurement of expired air carbon monoxide and serum thiocyanate levels, and a complete physical examination. During the ten years since the first examination, several new or more specific coronary heart disease risk factors have been recognized, including low density lipoprotein and insulin levels, and the anatomic distribution of body fat.
DESIGN NARRATIVE:
All women who participated in the first examination were invited to participate in the second examination. Medical records and/or death certificates were obtained to document coronary heart disease events. Questionnaires were used to collect information on health history, nutrition, and physical activity. A clinical examination assessed blood pressure, a variety of anthropometric measures and cardiovascular fitness. Blood specimens were collected for clinical chemistry and lipid/lipoprotein profiles. To assess genetic influence, the heritability of each of the risk factors was estimated. Blood was frozen for future studies of polymorphic DNA markers. Using the monozygotic co-twin control method, the effects of environmental or behavioral factors on these risk factors were assessed after controlling for genetic factors that could explain their association. Two hypotheses were examined that could be uniquely addressed using twin data. First, the association of body fat distribution with other coronary heart disease risk factors was mediated by serum insulin levels. Secondly, cardiovascular fitness explained in part the association of physical activity with coronary heart disease risk factors such as HDL-cholesterol and insulin levels. Lipoprotein analyses were conducted at Donner Laboratory at Berkeley.
The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.
研究の種類
参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
研究計画
研究はどのように設計されていますか?
協力者と研究者
捜査官
- Joseph Selby、Kaiser Foundation Research Institute
出版物と役立つリンク
一般刊行物
- Austin MA, Sandholzer C, Selby JV, Newman B, Krauss RM, Utermann G. Lipoprotein(a) in women twins: heritability and relationship to apolipoprotein(a) phenotypes. Am J Hum Genet. 1992 Oct;51(4):829-40.
- Edwards KL, Austin MA, Jarvik GP. Evidence for genetic influences on smoking in adult women twins. Clin Genet. 1995 May;47(5):236-44. doi: 10.1111/j.1399-0004.1995.tb04303.x.
- Mayer EJ, Newman B, Quesenberry CP Jr, Selby JV. Usual dietary fat intake and insulin concentrations in healthy women twins. Diabetes Care. 1993 Nov;16(11):1459-69. doi: 10.2337/diacare.16.11.1459.
- Austin MA, Hokanson JE. Epidemiology of triglycerides, small dense low-density lipoprotein, and lipoprotein(a) as risk factors for coronary heart disease. Med Clin North Am. 1994 Jan;78(1):99-115. doi: 10.1016/s0025-7125(16)30178-x.
- Mayer EJ, Newman B, Quesenberry CP Jr, Friedman GD, Selby JV. Alcohol consumption and insulin concentrations. Role of insulin in associations of alcohol intake with high-density lipoprotein cholesterol and triglycerides. Circulation. 1993 Nov;88(5 Pt 1):2190-7. doi: 10.1161/01.cir.88.5.2190.
- Selby JV, Austin MA, Newman B, Zhang D, Quesenberry CP Jr, Mayer EJ, Krauss RM. LDL subclass phenotypes and the insulin resistance syndrome in women. Circulation. 1993 Aug;88(2):381-7. doi: 10.1161/01.cir.88.2.381.
- Austin MA, Newman B, Selby JV, Edwards K, Mayer EJ, Krauss RM. Genetics of LDL subclass phenotypes in women twins. Concordance, heritability, and commingling analysis. Arterioscler Thromb. 1993 May;13(5):687-95. doi: 10.1161/01.atv.13.5.687.
- Edwards KL, Austin MA, Newman B, Mayer E, Krauss RM, Selby JV. Multivariate analysis of the insulin resistance syndrome in women. Arterioscler Thromb. 1994 Dec;14(12):1940-5. doi: 10.1161/01.atv.14.12.1940.
- Selby JV, Austin MA, Sandholzer C, Quesenberry CP Jr, Zhang D, Mayer E, Utermann G. Environmental and behavioral influences on plasma lipoprotein(a) concentration in women twins. Prev Med. 1994 May;23(3):345-53. doi: 10.1006/pmed.1994.1048.
研究記録日
主要日程の研究
研究開始
一次修了
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (見積もり)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。
心臓疾患の臨床試験
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Novartis Pharmaceuticals完了EC-MPS による治療に関心があり、コア研究の 12 か月の治療期間を無事に完了した患者 (de novo Heart Recipients)