Study of Nutritional Factors in Porphyria
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 30
研究概览
简要总结
OBJECTIVES: I. Determine whether differences in dietary habits are associated with disease activity in patients with acute intermittent porphyria.
II. Determine whether premenstrual porphyria attacks are associated with increased luteal phase energy requirements.
III. Determine whether energy requirements are higher than intakes in men with unexplained frequent porphyria attacks.
IV. Assess the nutritional status of women with acute intermittent porphyria using a comprehensive series of laboratory methods, including zinc and pyridoxine status.
V. Determine whether the frequency of disease exacerbations decreases when dietary and nutritional abnormalities are corrected in these patients.
VI. Evaluate the safety and efficacy of a parenteral nutrition regimen for patients with acute porphyria attacks.
详细描述
PROTOCOL OUTLINE: Women record diet intake for at least 1 cycle (28 days), then undergo a comprehensive nutritional assessment at least once during the follicular and luteal phases of the cycle.
Men also record diet intake for at least 1 month and undergo indirect calorimetry and other studies.
All patients receive a comprehensive analysis of diet and energy metabolism. Energy expenditure, resting metabolic rates, and basal metabolic rates are determined with indirect calorimetry, including measurements taken during the follicular and luteal phases of the cycle. Other testing includes hormone assays, serology for nutritional studies, and a urinary metabolite profile. Zinc, lead, and other metals are measured by atomic absorption spectroscopy.
The diagnosis of acute intermittent porphyria is confirmed by erythrocyte porphobilinogen deaminase; urinary aminolevulinic acid, porphobilinogen, and porphyrins; and total fecal porphyrins.
Patients hospitalized for acute attacks of porphyria during the study will receive standard treatment, including intravenous hematin and parenteral support.
研究设计
- 研究类型
- Observational
入排标准
- 年龄范围
- 0 Years 至 —（Child, Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- 未提供
排除标准
- 未提供